JPS644480B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a drying device, and particularly to a drum dryer suitable for drying clothes.

The front of this type of drum dryer includes a cold air intake, a heat source that heats the air taken in from the cold air intake, a hot air discharge unit that sends the heated air into the drum, and a A bearing section that rotatably supports the front end, a timer that sets the operating time, and a changeover switch section that changes the amount of heat generated by the heat source.Furthermore, a door switch that turns off the power to the heat source and motor and stops operation when the door is opened is installed. ing. Conventionally, the external parts were attached to the main body as separate parts, which made assembly work troublesome, and there were also problems such as poor airtightness and a reduction in the amount of hot air sent into the drum, resulting in a reduction in drying performance. was.

In view of the above points, an object of the present invention is to attach the door switch itself to the main body case without using screws or other parts.

The present invention includes a main body case, a drum rotatably supported within the main body case, an electric motor that rotationally drives the drum, an exhaust vane that exhausts air inside the drum to the outside, and air sucked into the drum. and a door that can be opened and closed at the front opening of the main body case, and a front case made of synthetic resin is attached to the back surface of the periphery of the front opening of the main body case, and a front case made of synthetic resin is provided on the front case. It has a door switch, and the front case is provided with a door switch mounting part to which the door switch is attached. An opposing piece provided at the front case, and a pressing piece provided apart from the holding piece and the opposing piece are integrally formed with the front case, and a through hole is formed at the bottom of the pressing piece, and the door switch is installed at the bottom of the pressing piece. This feature is characterized in that the door switch is held in the door switch mounting part by the claw part by inserting the door switch into the door switch and pushing it between the holding part and the opposing piece.

An embodiment of the present invention will be described above based on the drawings. The overall configuration will be explained with reference to Figure 1.
Reference numeral 1 denotes a main body case, which is made by bending a steel plate into a rectangular tube shape and fixing the ends by welding, and has a main body frame 2 having a front opening 3-1, and a rear frame 4 similarly fixed to the rear surface of the main body frame 2. It is composed of. Reference numeral 5 indicates a plurality of legs attached to the main body frame 2, which are used when the drying device is installed in a square shape directly on the floor. Reference numeral 6 denotes an intake port formed in the main body frame 2, and 7 a louver detachably attached to the front surface of the intake port 6. An intake filter 8 having an intake net on its surface is held between the louvers 6 and 7. Reference numeral 9 denotes a front case made of synthetic resin that is airtightly attached to the back surface of the main body frame 2 with an annular packing 10, and an entrance 11 for clothing is formed therein. Reference numeral 12 denotes a door that is attached to the main body frame 2 with a hinge (not shown) so as to be openable and closable, and is composed of a transparent plate 13 and an outer peripheral frame 14 that supports the transparent plate 13. Also, this door 1
2 is the annular packing 10 described above, which is connected to the entrance 1.
1 and maintains airtightness. 15 is a warm air guide fitted into the outer periphery of the entrance/exit 11. As is clear from FIG. 2, the front case 9 has a heat source mounting window 16 at its upper part, and this heat source mounting window 16.
a heat source mounting boss 17 provided on the upper side, a heat source hooking member 18, a bearing ring portion 19 having two supporting bosses 19-1 below the outer periphery of the entrance/exit port 11;
Control parts mounting part 20, door switch mounting part 2
1 and a heat-resistant plate mounting hole are provided integrally. That is, all the components required for the drying device can be attached to the front case 9, a sliding support piece for rotatably holding the drum can be attached, and the hot air guide 15 can also be easily installed. It can be attached, and the structure is designed to reduce the number of parts and improve ease of assembly. To further explain Fig. 2, 2
Reference numeral 2 denotes a heat source assembly, for example, as shown in FIG. 4, a positive resistance temperature characteristic element (hereinafter simply referred to as a heating element) 23 having a large number of honeycomb-shaped passages, electrode plates 24 and 25 that sandwich this, and these electrodes. It is composed of a screw 27 that commonly attaches the plates 24 and 25 to the heat source base 26, and a spring member 28 that applies appropriate contact pressure between the heating element 23 and both electrode plates.
The heating element 23 is made of a material whose resistance increases rapidly when the temperature exceeds a certain level, thereby avoiding the occurrence of a fire due to an abnormal temperature rise. The heat source assembly 22 is attached to the mounting window 16 by engaging the lower end with the hook 18 and fixing the upper part to the boss 17 with screws (not shown). Furthermore, this heat source assembly 22 has a mounting window 16 whose upper part is inclined toward the back.
Since it is installed, a space 31 is formed in which the air sucked in from the lateral end of the intake port 6 flows laterally and efficiently toward the heat source assembly 22, as shown in FIG. That is, this space 31 is formed in a triangular shape when viewed from the side between the air intake port 6 and the heat source assembly 22, and this space 31 allows all the air sucked from the air intake port 6 to flow into the heat source assembly. This improves the overall drying efficiency. Furthermore, since the heating element 23 is mounted with the upper part inclined backward, a large area heating element 23 can be used without increasing the vertical dimension. You can increase the amount. Reference numeral 32 designates a heat-resistant plate that is fitted into the mounting hole 30 and is integrally formed with two supporting bosses 32-1. The heat-resistant plate 32 is made of a material with higher heat resistance than the front case 9, such as glass fiber-reinforced polypropylene, and has a heat deformation temperature of about 150°C. The front case 9 is generally made of polypropylene having a heat deformation temperature of about 90°C. By providing the heat-resistant plate 32 in a portion of the front case 9 near the heat source assembly 22 in this way, the problem of thermal deformation is eliminated, and the material of the front case 9 can be made cheaper. Also, front case 9
Since deformation of the drum itself can be prevented, the airtightness between the front case and the drum can also be maintained at the desired performance. Reference numeral 33 denotes a back cover that covers the heat source assembly 22, and is attached by engaging a hole 35 provided in the back cover 33 with a claw 34 provided at the upper end of the front case 9. The door switch mounting portion 21 is constructed as shown in FIGS. 5 and 6. That is, the front case 9 is integrally formed with a through hole 36, a protruding fulcrum 37, a holding piece 39 having a claw portion 38, an opposing piece 40 located opposite the holding piece 39, and a pressing piece 41. .
Reference numerals 42 and 43 denote a door switch and its operation piece held in the space of the door switch mounting portion 21. When attaching the door switch 42 to the front case 9, first place the operating piece 43 on the fulcrum 37 as shown in FIG. 6, and then press the door switch 42 downward as shown by the arrow. At this time, the pawl 38 and the pressing piece 41 are pushed by the door switch 42 and deform outward, but when the door switch 42 is completely pressed, they return to their original positions. At this time, the pawl 38 and the pressing piece 41 press the upper surface of the door switch 42 and restrict its movement in the lateral direction, so that the door switch 42 is securely held within the door switch mounting portion 21. A lower receiving surface 47 receives the lower surface of the door switch 42, and the door switch 42 is held between the lower receiving surface 47, the claw portion 38, and the pressing piece 41. 44 is a rod for opening and closing internal contacts of the door switch 42; 45 is a through hole bored in the main body frame 2 supporting the front case 9; and 46 is an operator formed in the outer peripheral frame 14 of the door 12. Then, when the door 12 is closed, the operating element 46 passes through the through hole 45 and the operating piece 4
3 is pushed up, the door switch 42 is closed,
The drying equipment is ready for operation. Next, when the motor circuit and the heat generating circuit are closed, drying operation is performed. Referring again to FIG. 2, reference numeral 50 denotes a switch base on which mounting portions 51 and 52 are formed. A time switch 53 for controlling the operating time of the electric motor is attached to one attachment portion 51, and a changeover switch (not shown) for switching the amount of heat generated by the heat source assembly 22 is attached to the other attachment portion 52. This switch base 50 is fitted into the control box 20 of the front case 9 and fixed with screws or the like. 54 is a knob of the time switch 53. Referring again to FIG. 1, reference numeral 60 is a drum having a plurality of lifters 61 on its inner peripheral surface, the front end of which is rotatably supported around the bearing ring portion 19 of the front case 9, and the rear end of which is rotatably supported by the bearing ring portion 19 of the front case 9. It is rotatably supported around a fixed shaft 63 fixed to a support frame 62 fixed to the rear end of the main body frame 2. To explain in detail, a cylindrical portion 64 is provided on the front surface of the drum 60,
A bearing piece 65 made of synthetic resin is attached to the supporting boss 19-1 of the bearing ring part 19 at the outer circumference of the cylindrical part 64.
It is configured to be slidably supported.
Although not shown, a bearing piece is similarly attached to the supporting boss 32-1 of the heat-resistant plate 32, and the latter bearing piece is mainly used when the apparatus is used in an upright position. Furthermore, as is clear from FIG. 7, this bearing piece 65 is attached to the bearing boss 19-1 by the airtight felt 6 stretched on the inner surface of the bearing ring part 19.
Make sure to hold 6. That is, with this configuration, compared to simply fixing the airtight felt 66 to the bearing ring portion 19 with adhesive or the like, the airtight felt 66 can be firmly fixed mechanically, thereby preventing peeling due to heat or humidity. It can be prevented. 6
7 is a fixing hole into which the fixing claw 68 of the bearing piece 65 is fitted and fixed. 69 is a sliding piece made of felt or the like stretched on the inner surface of the cylindrical part 64; 70 is a bearing piece 6;
5 and the drum 60, and is a sliding piece made of felt or the like attached to the bearing piece 65. To explain the rear part of the drum 60, the drum 6
A bearing 72 is fixed to the rear plate 71 of 0 by a holder 73. Reference numeral 74 designates a locking hole provided in the rear plate 71 near the outer periphery of this bearing 72, and reference numeral 75 designates a number of exhaust holes provided outward. A net 76-1 is provided on the inner surface of the drum 60 of these exhaust holes 75.
A filter 76 having a filter 76 is removably attached to the mounting leg 77. 76-2 is an annular spring that snaps the filter 76 and the mounting leg 77 together. The mounting leg 77 is made of an elastic synthetic resin material, and has a locking claw 79 formed at its tip. After inserting the locking pawl 79 into the locking hole 74 as shown in FIG. Since the movement of the filter 76 is restricted and the filter 76 is prevented from coming off, even if the mounting legs 77 are made of synthetic resin, the filter 76 can be securely fixed. 81 is the support frame 6
The fixed shaft 63 is firmly supported by a collar body 83 in the front casing of the exhaust vane 82 which is manufactured integrally with the exhaust vane 2 . 84 is a vent provided in the front casing 81. A rear casing 85 covers the rear surface of the exhaust vane 82 and is connected to the front casing 81, and is provided with an exhaust port 86 opening rearward in a part of its outer periphery. Reference numeral 87 denotes a guide slope portion connected to the exhaust port 86 in order to improve exhaust performance. 8
8 is an exhaust joint fixed to this exhaust port 86, and this outlet faces an exhaust louver 89 provided in the rear frame 4. The exhaust vane 82 is composed of a synthetic resin or a centrifugal vane made of a full layer, and bearings are provided at both ends of the boss portion of the exhaust vane 82, and the exhaust vane 82 is rotatably supported around the fixed shaft 63. Furthermore, the rear end of the boss portion protrudes rearward from the through hole 90 of the rear casing 85, and a belt groove 91 is formed in this protrusion. Furthermore, a belt 92 driven by an electric motor, which will be described later, is hung in this belt groove 91. Reference numeral 93 denotes a seal cylinder for keeping the space between the exhaust port 75 of the rear plate 71 and the vent 84 of the front casing 81 airtight, and is made of felt material and is attached to the rear plate 71. The details of this mounting configuration are as shown in FIGS. 9 and 10. To explain these figures, 94 is a seal cylinder frame attached to the rear plate 71 and has an outer peripheral wall 95 and a cut-and-raised inner peripheral piece 96. The outer peripheral wall 95 has locking claws 9 cut inwardly.
7. Locking claws 98 are formed on both ends of the inner peripheral piece 96 and are slightly bent outward. Then, by inserting the end portion of the seal cylinder 93 between the outer circumferential wall 95 and the inner circumferential piece 96, and bending the inner circumferential piece 96 outward as shown in FIG. 9, the seal cylinder 93 is held between the two. At this time, the locking claws 97 and 98 bite into the seal tube 93, so that even if a considerable external force is applied to the seal tube 93, the connection between the seal tube 93 and the seal tube frame 94 will not fail. In addition, FIG. 10 is a state diagram before installation.

Reference numeral 100 is fixed to a mounting leg 101 extruded from the main body frame 2 by an electric motor. 102 is the capacitor, 103 is a motor shaft, and a pulley 104 is attached to one end of the shaft, and a pulley 105 is attached to the other end. A drum drive belt 106 is wound between the outer periphery of the drum 60 and the pulley 104. A support frame 107 is fixed to a motor board 108 and supports a tension pulley 109. This tension pulley 109 applies a predetermined tension to the drum drive belt 106 using a tension spring 110. 111 is a motor cooling fan integrated with the pulley 105; 112;
is a fan belt wound between the pulley 105 and the belt groove 91 integrated with the exhaust vane 82. FIG. 11 shows the handle portion of the door 12. To explain this drawing, 13 and 14 are the above-mentioned transparent plate and its outer peripheral frame. The outer peripheral frame 14 is made of synthetic resin, and has handle portions 113 and 114 projecting left and right on the front surface opposite to a door hinge (not shown). The reason why the grip portions are provided on the left and right sides is that the device is used in an upright or inverted position. In other words, if the handle parts are provided on the left and right sides, the door can be opened and closed with the dominant hand, regardless of which hand is used. 115 is a permanent magnet for fixing the door 12 to the main body case 1, and opposing ribs 116 and 117
It is attached with a pin 118 between them. 119 is a through hole provided in the permanent magnet 115, and the pin 11
8 is inserted, and a conical retaining ring 120 is fitted into the protrusion of the pin 118. Furthermore, if the rib 121 is provided at this time, the pin 118 can be inserted with the permanent magnet 115 placed on the rib, thereby improving the work. 122 and 123 are hand 1
The ribs 13 and 114 are connected to each other to form a bag-like space for the handle. Furthermore, this shape makes it possible to divide the mold into upper and lower parts in the drawing, making molding very easy, and since the rear of the bag-like space on the side of the handle 114 is shielded by the transparent plate 13, the appearance design and sealing performance are improved. There is no particular problem in this respect.

FIG. 12 shows an improved shape of the hot air guide 15. The warm air guide 15 is provided with an inner cylinder 124 so that a cooling passage 125 is formed between the outer peripheries of the inlet and outlet ports 11 . 126 and 127 are main frame 2
and through holes formed in the front case 9 and communicating with the cooling passage 125. When the exhaust vane 82 is rotated, external air is sucked in through the through holes 126 and 127, and the cooling passage 1
25 and into the drum 60. At this time, since the clothing entrance/exit 11 is cooled by the air passing through the cooling passage 125, there is no danger of getting burned even if your hand touches the clothing entrance/exit 11. Hot air from the heat source assembly 22 is drawn into the drum 60 through the outer periphery of the inner cylinder 124.

Next, the operation will be explained. When the washed and dehydrated laundry is put into the drum 60 and the door 12 is closed, the door switch 4 is activated by the operator 46 of the door 12.
2 is closed. Under this condition, when the time switch 53 is set to a predetermined time, the electric motor 1
Current is supplied to the heating element 23 and the heating element 23. At this time, the amount of heat generated by the heating element 23 is changed over by a changeover switch depending on the amount of laundry. This switching is actually performed by changing the number of heating elements 23. When the electric motor 100 rotates, the pulley 10
4. The drum 60 is rotated at low speed by the belt 106. The rotational speed at this time is usually 50/min, which is such that the clothes are pulled up by the lifter 61 and dropped from above. Also, at the same time, pulley 10
5. The exhaust vane 82 is rotated at high speed by the fan belt 112. By rotating the exhaust vane 82, external air is sucked in through the intake port 6, is heated by the heating element 23, and then passes through the hot air guide 15 and reaches the inside of the drum 60. Clothes are repeatedly pulled up and dropped inside the drum 60, and the hot air removes moisture from the clothes, passes through the filter 76, the exhaust hole 75, and the vent 84, and reaches the inside of the fan casing. Further, the humid air discharged by the exhaust vane 82 is sent to the exhaust port 86, the exhaust joint 88, and the exhaust louver 8.
9 to the outside from the back of the drying device. When the time switch 53 is turned off, the electric motor 10
0, the power supply to the heating element 23 is cut off, and the drying operation is stopped. Next, the door 12 is opened and the clothes are taken out from the drum 60, and the series of operations is completed. At this time, since the door switch 42 is opened, the drum 60 will not rotate unexpectedly, making it safe. Furthermore, even if the door 12 is opened inadvertently during the drying operation, the drum 60 will stop, making it safe.

A main body case, a drum rotatably supported within the main body case, an electric motor that rotates the drum, an exhaust vane that exhausts the air inside the drum to the outside, and a heat source that heats the air sucked into the drum. and a door that can be opened and closed at the front opening of the main body case, wherein a front case made of synthetic resin is attached to the back surface of the periphery of the front opening of the main body case, and a door switch provided in the front case is provided. , the front case has a door switch mounting part for attaching the door switch,
This door switch mounting part has a holding piece with an inward claw on the tip side, a facing piece that is spaced apart by the width of the door switch and facing the holding piece, and a piece that is spaced apart from the holding piece and the facing piece. By forming the pressing piece integrally with the front case and forming a through hole in the lower part of the pressing piece, and inserting the door switch into the lower part of the pressing piece and pushing it between the holding part and the opposing piece, This device is characterized in that the door switch is held in the door switch mounting portion by holding the claw portion so as not to slip out.

According to this configuration, the following advantages can be expected.

Since the door switch is elastically held by several holding pieces provided on the front case, the door switch does not require any tools and is extremely easy to install.

[Brief explanation of the drawing]

Figures 1 to 11 show one embodiment of the present invention. Figure 1 is a vertical cross-sectional view of the entire device in an inverted state, and Figure 2 is an exploded perspective view of the front case section viewed from the back side. , Fig. 3 is an exploded perspective view when seen from the front, Fig. 4 is a vertical sectional view of the heat source assembly, Fig. 5 is a perspective view of the door switch mounting part, and Fig. 6 is a cross section with the door switch installed. 7 is a longitudinal sectional view of the airtight felt attachment part, FIG. 8 is a longitudinal sectional view of the filter attachment part, FIG. 9 is a longitudinal sectional view of the seal cylinder attachment part, and FIG. 10 is a perspective view. FIG. 11 is a cross-sectional view of the handle portion, and FIG. 12 is a longitudinal cross-sectional view of the cooling passage portion, showing another embodiment. 1...Main case, 9...Front case, 1
0...Annular packing, 11...Entrance/exit, 12...
...Door, 15...Hot air guide, 16...Heat source mounting window, 19...Bearing ring, 20...Control box, 21...Door switch mounting portion, 22...Heat source assembly.

Claims (1)

[Claims] 1. A main body case 1, a drum 60 rotatably supported within the main body case 1, an electric motor 100 that rotationally drives the drum 60, and an exhaust vane that exhausts air inside the drum 60 to the outside. 82, a heat source section 23 that heats the air sucked into the drum 60, and a door 12 that can be opened and closed at the front opening of the main body case 1.
A synthetic resin front case 9 is attached to the back surface of the front opening of the main body case 1, and a door switch 42 is provided on the front case 9, and the door switch 42 is attached to the front case 9. A door switch mounting portion 21 is provided, and the door switch mounting portion 21 has a holding piece 39 having an inward claw portion 38 on the tip side, and a door switch 42 has a facing piece 40 provided opposite to the holding piece 39 with a width distance apart. and a pressing piece 41 provided apart from the holding station 39 and the facing piece 40 are formed integrally with the front case 9, and the pressing piece 41 is formed integrally with the front case 9.
By inserting the door switch 42 into the lower part of the pressing piece 41 and pushing it between the holding part 39 and the facing piece 40, the door switch 42 is prevented from coming out with the claw part 38. The door switch 42 is attached to the door switch mounting part 21.
A drying device characterized in that it is maintained at