JPH0446563B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to a shelf installed at a high place in a house, such as a wall cabinet for a system kitchen.

[Prior art]

BACKGROUND ART Conventionally, it has been proposed to provide a shelf installed at a high place in a house so that it can be raised and lowered to facilitate storage and removal. When driving the shelf up and down with a motor,
If the shelf hits an obstacle while descending, or if the stored items on the shelf are overloaded or protrude outwards and prevent the shelf from rising, the motor may continue to rotate or burn out, which is dangerous.

〔the purpose〕

In order to solve the conventional drawbacks with a simple configuration, this invention allows a wire, one end of which is pulled by a traction device driven by a motor, to hang down in a U-shape, and a U-shaped part at the lower end of the wire that can be raised and lowered. A pulley is attached to a shelf, and the other end of the wire is equipped with a control device that controls the motor to stop based on the movement of the other end as the load changes. This is to ensure safety by stopping the motor when it is forced to stop descending or rising, or when there is an overload.

〔Example〕

This invention will be explained in detail with reference to FIGS. 1 to 4, which show a cupboard with a drying device. In the figures, 10 is a box with an open bottom, and a shelf 11 can be raised and lowered through the opening in the bottom. It's decorated.

The box body 10 has partition plates 13 disposed at intervals below the top plate and a lid plate 14 covering the front surface between the top plate and the partition plates so as to form a machine room 12 in the upper part of the interior. There is.

Reference numeral 15 denotes a traction device installed in the machine room 12, in which a worm 17 is provided on the shaft of a motor 16 capable of forward and reverse rotation, and a winding drum 2 for wire 19 is connected to a gear 18 that meshes with the worm 17. The wire 19 is direction-changed by a fixed pulley 21 and passes through the partition plate 13
It hangs down from a hole in the. Reference numeral 22 designates another drum connected to the drum 20, and a wire 23 wound around this drum is pulled by a spring 24 to urge it to rotate in a direction that resists the rotational torque of the drum 20 based on the weight of the shelf 11.

The shelf 11 has an arm 27 on the front surface of a back plate 25 on which a dish basket 26 is removably placed, and a bottom plate 29 on which a water tray 28 is placed below the dish basket 26. A suspension device (not shown) used for slidingly guiding a rail member such as a drawer is provided between the back plate 25 and the back plate 30 of the box body 10, and guides the shelf 11 up and down. A pulley 3 is installed on the upper back of the back plate 25.
1 is rotatably provided, and its pulley 31 is suspended from the U-shaped lower end of the wire 19 hanging down in a U-shape.

The tip of the wire 19 (the end opposite to the side wound around the traction device 15) is connected to an actuating plate 33 that is pushed up by a spring 32 against the weight of the shelf 11. The operating plate 33 has a motor 1
A switch 34 inserted into the power supply circuit for rotation in the rewinding direction of No. 6 is disposed opposite to the switch 34. When the weight of the shelf 11 is acting on the wire 19, the spring 32 is compressed by the weight, the actuating plate 33 is lowered, and the switch 34 is in the closed state.

The front plate 37 fixed to the front lower part of the box body 10 includes
a switch knob 35a for raising and lowering the shelf 11;
36a is provided. Knob 3 for lifting operation
When the switch 36 is closed by operating the switch 6a, the motor 16 rotates the winding drum 20 in the direction of winding up the wire 19 and raises the shelf 11. When the lowering operation knob 35a is operated to close the switch 35, the motor 16 rotates the drum 20 in the direction in which the wire 19 is rewound, and the shelf 11 is lowered by its own weight. As shown in FIG. 4, if an obstacle 38 is placed below the shelf 11, the shelf 11 will be stopped midway down and the motor 16 will continue to rotate in the direction of loosening the wire 19. However, as the wire 19 loosens slightly, the actuating plate 33 rises due to the action of the spring 32, and the switch 34
is opened to stop the motor 16.

FIG. 5 shows another embodiment, in which the actuating plate 33
Another spring 39 having a larger spring constant than the spring 32 is provided below the motor 1 at an interval.
A switch 40 inserted into the power supply circuit for rotation in the winding direction of No. 6 is disposed opposite to the switch 40. wire 19
In other words, when the normal weight is acting on the shelf 1
1 is loaded with a weight within the set limit, the spring 39 is hardly compressed, the actuating plate 33 does not press the switch 40, and the switch 40 is in the closed state. If a weight exceeding the set limit is placed on the shelf 11, or if an item protruding sideways from the tableware basket 26 on the shelf 11 collides with the lower end of the box 10 while the shelf 11 is rising, the wire 19 may be overloaded. A tensile force acts, compressing the spring 39, pushing the switch 40 by the operating plate 33, and opening the power supply circuit to the motor 16.

The rail member (not shown) between the back plate 25 of the shelf and the back plate 30 of the box body has stoppers (not shown) for determining the upper and lower limit positions of the shelf 11.
is provided, and the switches 34 and 40 are also opened when the shelf 11 is stopped from rising or falling by this stopper.
40 can have the same function as a normal limit switch.

The cupboard of this embodiment is equipped with a drying device. That is, a fan 42 driven by a motor 41 is built into the machine room 12. The back plate 30 of the box body 10 has a ventilation passage 3 between the two plates 30a and 30b.
The plates 30a, 30 have a hollow structure in which 0c is formed.
A semiconductor heater 4 having positive temperature resistance characteristics is connected between
3 is sandwiched, and a fan 42 is placed at the upper end of the ventilation passage 30c.
A discharge air pipe 44 is connected thereto. Ventilation passage 30
Two opposing through-holes 45 and 46 are provided in the lower end of c and the back plate 25 of the shelf, opening the ventilation passage 30c toward the tableware basket 26. A fan 4 is installed on the cover plate 14 of the machine room 12 and the door 47 on the front of the box body 10.
Inlet ports 48 and 49 communicating with the intake side of the lid 14 are provided, and the inlet port 48 of the lid 14 is covered with a filter 50. An exhaust port 51 is provided at the top of the door 47 to open the space above the shelf 11 to the outside.

An operating knob 52a of an electric time switch is provided on the front plate 37 of the box body 10, and the shelf 11 is raised to the upper limit position in a series circuit of the time contact 52 of the time switch, the motor 41, the heater 43, and the timer motor 52b. A switch 53 which is closed in response to this is connected in series. Therefore, if the switch 36 for raising operation is closed and the time switch is set immediately, the switch 53 is closed after the shelf 11 moves upward, and power is automatically supplied to the motor 41 for the fan 42 and the heater 43 to start drying operation. do. The air sucked from the intake ports 48 and 49 by the fan 42 is passed through the ventilation passage 30c in the back plate 30.
After being heated by the heater 43, the through hole 4
5, 46 toward the tableware basket 26, and exits from the exhaust port 51 together with the moisture taken from the items to be dried.

The elevating shelf detailed above is not limited to storing tableware.
The dryer can be removed and used for storing other items.

〔effect〕

In this invention, a wire, one end of which is pulled by a traction device driven by a motor, is suspended in a U-shape, and a pulley provided on a shelf that can be raised and lowered is hung on the U-shaped portion at the lower end of the wire, and the wire is Since the other end is provided with a control device that controls the motor to stop based on the movement of the other end as the load changes, the shelf is forcibly stopped from descending or rising, or when the shelf is overloaded. When a load is applied, the motor can be reliably stopped to ensure safety.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of the elevating shelf in a lowered state, Fig. 2 is a vertical sectional view of the elevating shelf in the stored state, and Fig. 3 is a vertical sectional view of the elevating shelf in the stored state.
The figure is a sectional view taken along the line 3-3 in FIG. 2, FIG. 4 is an explanatory diagram of the operation of FIG. 3, FIG. 5 is an enlarged view of main parts showing another embodiment, and FIG. 6 is an electric circuit diagram. 10... Box body, 11... Shelf, 15... Traction device, 19... Wire, 31... Pulley, 32,3
9... Spring of the control device, 34, 40... Switch of the control device.

Claims (1)

[Claims] 1. A wire whose one end is pulled by a traction device driven by a motor is suspended in a U-shape, and a pulley provided on a shelf that can be raised and lowered is hung from the U-shaped portion at the lower end of the wire. and a lifting shelf, further comprising a control device at the other end of the wire for controlling the motor to stop based on the movement of the other end in response to changes in the load applied to the wire via the pulley. 2. The elevating shelf according to claim 1, wherein the control device stops the pulling operation of the wire based on an insufficient load caused by stopping the descending of the shelf. 3. The elevating shelf according to claim 1, wherein the control device stops the pulling operation of the wire based on stopping the shelf from rising or an excessive load due to an overload. 4. The control device comprises a spring that extends the other end of the wire against the traction operation direction, and a switch that opens and closes a power supply circuit to the motor based on movement of the other end. Section 1, Section 2
The elevating shelf described in Section 3 or Section 3.