JPH03211183A - Dumbwaiter - Google Patents

Abstract

PURPOSE:To keep a door in a state of being closed as well as to reduce the extent of lifting force when the door is opened, by installing a suction body in a lower end of the door and one side of door receivers being opposed to this lower end and a magnetic substance in the other, respectively. CONSTITUTION:A freight handler holds a lever 13 and sets up the longitudinal direction in the vertical direction when closing a door 5. At this time, since an N pole part of a permanent magnet 12 is opposed to a suction piece 11A and an S pole part to a suction piece 11B, respectively, a line of magnetic force is formed in space between these pieces 11A and 11B, whereby suction force is generated from a suction body 10. Consequently, this suction body 10 is attracted to a magnetic substance 9, and the door 5 is held by a door receiver 6 in a state of being closed. When the door 5 is opened, the lever 13 is held and the magnet 12 is rotated, and when the longitudinal direction of the lever 13 is set up in the cross direction, each of both N, S pole parts of the magnet 12 is opposed to an intermediate part between these pieces 11A and 11B. Therefore the formation of the line of magnetic force is eliminated, and as no suction body is produced, such a state that the door 5 is kept by the door receiver 6 is released.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a dumbwaiter that has a door that opens and closes in the vertical direction and that transports small packages, food, and the like.

[Conventional technology]

FIG. 4 is a side view showing the general configuration of a dumbwaiter.

1 is a floor, 2 is an entrance provided on the floor 1, 3 is a floor door that opens and closes in the vertical direction, 3a is a handle provided protruding from the bottom of the floor door 3, 4 is a small baggage, food etc.,
A car that can be stopped on floor 1, 5 is installed at this corner 4,
A door that can face the floor door 3, 5a is a flat groove formed at the bottom of the door 5, 6 is attached to the bottom of the heel 4 and is a door holder that receives the bottom end of the door 5, 7 is the bottom edge of the door 5. Buffer material installed.

Generally, in the case of dumbwaiters, as shown in Figure 4,
When the car 4 arrives at the floor 1, the cargo handler opens the floor door 3 by pushing up the handle 3a, and then opens the floor door 3 by pushing up the handle 3a.
Put your hand in a and push up door 5 to open this door 5. At this time, a detection switch (not shown) provided on the floor door 3 detects that the floor door 3 has opened to a predetermined position, and accordingly, the operation circuit of the dumb waiter opens, that is,
Car 4 is held in an inoperable state. After loading the cargo into the car 4 in this state, the door 5 and the floor door 3 are closed in sequence. The operation circuit of the dumbwaiter is closed by the detection of the above-mentioned detection switch, and the heel 4 is operated.

However, with such a dumbwaiter, when the door 5 is lowered and closed, it may jump up due to an impact, that is, it may open even though it has been closed, and in this way, the door 5 may not be completely closed. If the car 3 were operated in this condition, there was a risk that the cargo in the car 3 would protrude from the gap between the doors 5 and get caught in the hoistway, causing an accident.

FIG. 5 is a front view of a cage portion showing a conventional example of a dumbwaiter from this viewpoint.

In the conventional dumbwaiter shown in FIG. 5, a permanent magnet 8 is attached to the lower end of the door 5, and a magnetic body 9 is attached to the door holder 6 opposite to the permanent magnet 8.

In this conventional dumbwaiter, when the door 5 is lowered and closed, the cushioning material 7 of the door 5 comes into contact with the door receiver 6, and the permanent magnet 8 is attracted to the magnetic body 9, so that the closed end of the door 5 In other words, jumping due to the impact when the door 5 closes is suppressed. This prevents the door 5 from not being fully closed as described above.

Incidentally, since such a dumbwaiter is not intended for people to ride on the heels 4, the door 5 is often not provided with a detection switch for detecting the movement of the door 5.

On the other hand, in order to prevent the cage 4 from operating when the door 5 is not fully closed, when the above-mentioned detection switch is provided on the door 5, a cable for the detection switch that is lifted from the cage 4, and other various It is necessary to provide additional equipment, and there is a risk that the detection switch may be erroneously activated due to vibration or the like when the car 4 is being raised or lowered, and the car 4 may stop midway.

[Problem to be solved by the invention]

By the way, in the above-mentioned conventional dumbwaiter, when opening the door 5 with the permanent magnet 8 of the door 5 attracted to the magnetic body 9 of the door holder 6, a lifting force considerably larger than the magnetic force of the permanent magnet 8 is required. In other words, there was an operational problem in that the door 5 was heavy to open.

SUMMARY OF THE INVENTION An object of the present invention is to provide a dumbwaiter that can not only keep the door closed, but also reduce the lifting force required to open the door.

[Means to solve the problem]

In order to achieve the above object, the present invention provides a dumbwaiter equipped with a door that opens and closes in the vertical direction.
The structure includes an attracting body that has a permanent magnet and generates an attractive force by the movement of the permanent magnet, and a magnetic body that is attracted by the attracting body on the other side.

[Effect]

Since the present invention is configured as described above, when closing the door,
When the permanent magnet is moved, an adsorption force is generated from the adsorption body,
In other words, this adsorbent adsorbs to the magnetic material. As a result,
The door is held closed by the door holder. In addition, when the permanent magnet is returned to its original position when opening the door, the adsorption force will not be generated from the adsorption body, and this will release the door from being held in the door holder. The lifting force is small.

〔Example〕

Hereinafter, embodiments of the dumbwaiter of the present invention will be described based on the drawings.

4. Figures 1 to 3 are diagrams showing one embodiment of the dumbwaiter of the present invention, with Figure 1 being a front view of the cage, and Figure 2 being an explanatory diagram showing a state in which suction force is generated from the suction body. FIG. 3 is an explanatory diagram showing a state in which no adsorption force is generated from the adsorption body.

In addition, in these FIGS. 1 to 3, the above-mentioned 4th
Components equivalent to those shown in FIG. 5 are given the same reference numerals.

In the dumbwaiter of this embodiment, as shown in FIG. 1, for example, a pair of adsorbents 10 are provided at the lower end of the door 5, and a pair of magnetic bodies 9 to which the adsorbers 10 are adsorbed are provided on the door receiver 6, respectively. As shown in FIGS. 2 and 3, the attracting body 10 includes two divided attracting pieces IIA and IIB, a permanent magnet 12 rotatably housed in the attracting pieces 11A and IIB, and a permanent magnet 12 rotatably housed in the attracting pieces IIA and IIB. It consists of a lever 13 fixed to a permanent magnet 12, and the rotation of this permanent magnet 13 selectively generates an attractive force.

Now, when the cargo handler closes the door 5, he grasps the lever 13 and arranges the lever 13 in the longitudinal direction as shown in FIG. At this time, since the N pole part of the permanent magnet 12 faces one of the attraction pieces IIA, and the S pole part of the permanent magnet 12 faces the other attraction piece IIB, the attraction piece II
Magnetic lines of force are formed between A and 11B, and an adsorption force is generated from the adsorption body 10. As a result, the attracting body 10 is attracted to the magnetic body 9, and the door 5 is held in a closed state by the door receiver 6.

In addition, when opening the door 5, hold the lever 13 and rotate the permanent magnet 12, and if the longitudinal direction of the lever 13 is arranged horizontally as shown in FIG. Department,
Each of the S pole portions faces the intermediate portion between the suction pieces IA and 11B. As a result, suction piece IIA,
Since the magnetic lines of force between 11B are no longer formed and no adsorption force is generated, the state in which the door 5 is held by the door holder 6 is released.

According to this embodiment, not only can the door 5 be kept closed, but also the lifting force required when opening the door 5 can be reduced.

In addition, in this embodiment, an adsorbent 10 is provided on the door 5,
A magnetic material 9 was provided on the door holder 6, but in contrast to this case,
The magnetic body 9 may be provided on the door 5 and the adsorbent 10 may be provided on the door receiver 6. Further, in this embodiment, a pair of adsorbents 1o are provided, but other number of adsorbents, for example, only one adsorbent, may be provided as needed. Furthermore, in this embodiment, the lever 13 of the permanent magnet 12 is configured to be operated directly, but an operating lever that interlocks with this lever 13 is provided inside the handle 5, and when the operating lever is grasped together with the handle 5, It is also possible to arrange the lever 13 longitudinally in the vertical direction as shown in FIG. 2, and on the other hand, to arrange it horizontally as shown in FIG. 3 when the operating lever is released.

〔Effect of the invention〕

According to the present invention, the adsorbent can hold the door in a closed state by adsorbing it to the magnetic material, thereby eliminating jumping when closing the door and preventing the door from opening during car operation. This has the effect that the lifting force required when opening the door can be reduced, and therefore the operability of the dumbwaiter door can be improved.

[Brief explanation of drawings]

1 to 3 are diagrams showing an embodiment of the dumbwaiter of the present invention, with FIG. 1 being a front view of the cage, and FIG. FIG. 3 is an explanatory diagram showing a state in which no adsorption force is generated from the adsorbent, FIG. 4 is a side view showing the general configuration of a dumbwaiter, and FIG. 5 is a front view of a cage portion showing a conventional example of a dumbwaiter.

Claims (1)

[Claims] (1) In a dumb waiter equipped with a door that opens and closes in the vertical direction, a permanent magnet is provided at either the lower end of the door or the door holder facing the lower end, and the movement of this permanent magnet generates an attractive force. What is claimed is: 1. A damwaiter comprising: an adsorbent that holds the absorbent, and a magnetic body that is adsorbed by the adsorbent.