JPS6364208A - Lift - Google Patents

Abstract

(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Purpose of the Invention (Industrial Application Field) The present invention relates to a lifting device used for lifting and lowering high ceiling lighting equipment and the like.

(Prior art) As a conventional lifting device, for example, the
5 = The one shown in Publication No. 1 is known.

This device requires a switch for controlling elevation, and the switch is installed as follows.

That is, a holding body is installed on the lower side of the frame, a base is installed on the lower side of the holding body, and a locking device f5 for the lifting section is provided on this base, and the locking device f5 for the lifting section is connected to the holding body. A detection metal fitting and a lift control switch linked to this metal fitting are provided.

(Problem to be Solved by the Invention) Therefore, the height in the upward and downward directions is increased, and the mounting member is equipped with a locking mechanism, a detection fitting interlocked with the lifting section, and a control switch. As a result, it is difficult to maintain a desired mutual positional relationship between the locking mechanism, the detection fitting, and the control switch, and adjustment during assembly is troublesome.

SUMMARY OF THE INVENTION The present invention aims to eliminate the above-mentioned drawbacks and to provide a lifting device which can be made thin and which does not require troublesome adjustments during assembly.

[Construction of the Invention (Means for Solving Problems)] The present invention provides a storage section having an opening on the bottom surface on the bottom surface of a chassis with a winding device attached to the top surface, and a storage section inside the storage section. A locking mechanism is provided, and the cable wound on the winding device is provided with an elevating part suspended on the lower surface side of the chassis, and this elevating part is raised in accordance with normal rotation of the winding device, and The lifting section is lowered in response to the reversal of the winding device, and one end is rotatably placed inside the storage section and locked by the locking mechanism. A detecting section interlocked with the elevating section is provided to face the upper surface of the elevating section and extend in the lateral direction, and an elevating control switch responsive to the detecting section is further provided on the side of the storage section. be.

(Function) A detection lever is provided extending horizontally within the storage area of the lifting section provided on the bottom surface of the chassis, and a locking mechanism and control switch are also provided in the same storage area. It is thin and does not require troublesome adjustments during assembly.

(Example) Hereinafter, an example of the present invention will be described with reference to FIGS. 1 to 7. (1) is the chassis, (2) is this chassis (1)
) A winding device attached to the top surface, (3) a storage section with an opening (4) on the bottom surface and attached to the bottom surface of the chassis (1), and (5) inside the storage section (3). Locking machine 171 provided. (6) is a cable wound on the winding device (2). Further, (7) is an elevating part, which is suspended by cables (6) on the lower surface side of the chassis (1), and rises as the winding device (2) rotates forward or reverse. From the storage section (3
) and is locked in the lock 11 (6), and lowers in response to the reversal of the winding device (2);
(9) is a detection lever. This detection lever (9) is
It is provided to extend laterally within the storage section (3), and is rotatably supported in the middle section, with one end attached to the elevating section (
7), and is interlocked with the lifting and lowering movement of the lifting unit (7).

(11) is a switch for controlling elevation, and is provided on the side of the storage section (3).

Next, to explain the above embodiment in more detail, the winding device (2) includes a winding drum (13) and this drum (1
3) has a motor (14) that drives the frame <15
) to the chassis (1).

Further, the cable (6) is led out along the frame (15), detoured along the lower surface of the chassis (1) by a plurality of guide rollers (16), and is guided around the chassis (1).
It hangs down from the lower surface part and is connected to the elevating part (7). Further, (17) is a slack detection switch provided on the chassis (1) along the cable (6). Also, (18)
is a fixed contact provided in the storage part (3), (19) is a movable contact provided in the lifting part (7), and these contacts (18),
(19), the lifting section (7) is powered.

Moreover, between the winding device 7F (2) and the chassis (1),
Relay (32), (35) capacitor (21) on - side
A wiring board (23) with a terminal block (22) on the other side
is provided. Note that (24) is a two-part cover.

(25) is the handle 6 Furthermore, (9a) is the detection lever (
(9) rotatably supports the shaft, (26) is the storage part (3
) with said fixed contacts (18) elastically supported by springs (12) in said contact plate (
26) is pressed by the elevating part (7) and moves up and down in conjunction with this. One end of the detection lever (9) is connected to this contact plate (26).
It faces the lifting part (7) via the contact plate (2
6), and is interlocked with the raising and lowering operation of the raising and lowering part (7). The contact plate (26) may not be interposed between the elevating portion (7) and one end of the detection lever (9) may be directly opposed to the elevating portion (7).

Next, referring to Fig. 6, the rise/fall switching control device will be explained in detail. (31) is the power supply, (32) is the rise.

The selector switch for lowering operation (33) is the first relay. This relay (33) has a switching contact (33a) and a self-holding contact (33b), and has a switching contact (33a) and a self-holding contact (33b).
a) is inserted into the forward/reverse switching circuit of the motor (14).

Also, (35) is the second relay, and this relay (35) is the first relay. It has second switching contacts (35a) and (35b), and the first switching contact (35a) is a switch (32).
), and the second changeover switch (35b) is connected to the first.
It is inserted between the second control switches (10), (11) and the first relay (33). Further, the third control switch (36) is inserted in series with the normally open switching contact of the first relay (33).

Next, the operation of the switching control device will be explained. To explain with reference to FIG. 6, when the elevating section (7) is stored in the storage section (3) and is not locked in the locking mechanism (51) (FIG. 6A), the first control switch is activated. Since (10) is a normally closed switch, it is opened by being pushed by the detection lever (9) that is pressed by the elevating part (7). When the selector switch (32) for lifting and lowering operations is switched to the lowering side, the relay (35) is energized and the first. Second switching contact (35
a) and (35b) are switched, the winding device (7) rotates normally, and the elevating part (7) rises.

During this process, the second control switch (11) is activated by the detection lever (
9) is pressed and closed (because the Bl changeover switch (35b) in the figure is switched to the normally open contact side, it has no effect on the operation of the lifting section (7). It further rises and closes from the locked position. When the first level (Ll) is reached (C in the same figure), the first control switch (10) is released from the pressure by the detection lever (9) and closed (C in the same figure). The lock of the part (7) is released, the first relay (33) is energized, the switching contact (33a) is switched, the self-holding contact (33b) is closed, and the motor (
14) is reversed and the elevating section (7) descends. During this process, the first control switch (10) is pressed by the detection unit (9) and opens again (E in the figure), but the first control switch (33)
) is self-held by the self-holding contact (33b), the motor (14) continues to reverse rotation, and the lifting part (7
) continues to fall. When the first control switch (10) further descends, the pressure by the detection lever (9) is released again and the first control switch (10) closes, and the elevating section (7) continues to descend (FIG.
.

G). When the lifting section (7) reaches the floor and the cable (6) slackens, the slack detection control switch (36) opens, the motor (14) stops, and the lifting section (7) stops descending. do. During this lowering operation, the first control switch (10
) is no longer pressed by the detection lever (9) and is closed, so even if the operation is stopped midway and the lowering operation is performed again, the elevating portion (7) continues to descend again.

Next, when the changeover switch (32) is switched to the upward side, the motor (34) rotates normally, the winding device (2) winds up the cable (6), and the elevating section (7) rises. In this case, the relay (
35) is not energized, its switching contact (35b) is switched to the normally closed side. Further, the lifting section (7) rises, passes through the positions shown in FIG. 6 (G) and (H), passes the lock position (0) shown in FIG. 6, and reaches the first level (Ll
), the second control switch (11) is pressed by the detection part (9) and closed, and the switching contact of the relay (33) is turned off. Instead, the motor (14) rotates in reverse and the lifting section (7) descends. When it descends to the lock position, it engages, that is, lock R.
1m (5) is locked and the elevating part (7) stops descending (J in the same figure).

Due to the slack in the cable (6), the slack detection control switch (36) is opened and the motor (14) is stopped.

Then, a locking mechanism (5) for storing the elevating part (7) is provided in the storage part (3) for storing the elevating part (7), and a detection lever (9) interlocked with the elevating part (7) is provided. A detection lever (9) is installed on the side of the storage section (3).
A switch for lifting and lowering control that is linked to <10).

(11), the entire device is thin. These locking mechanism (5), detection lever (9), and switches (10), (11) can be integrally attached in advance to the storage part (3) that stores the lifting part (7),
Further, at this time, it is easy to set the mutual positional relationship as desired, and therefore, troublesome adjustment is not required during the overall assembly, and the assembly work can be performed in a short time.

[Effects of the Invention] As described in detail above, the present invention provides a storage section having an opening on the bottom surface on the bottom surface of the chassis to which the winding Fl device is attached to the top surface, and a locking mechanism is provided in the storage section. A lifting section suspended on the lower surface side of the chassis is provided on the cable wound on the winding device, and the lifting section is raised in response to normal rotation of the winding device, and is raised from the opening of the storage section. Store it in the storage section and lock it with the lock 1RtpI,
In response to the reversal of the winding device, the elevating section is lowered, and a detection section interlocked with the elevating section is placed inside the storage section, rotatably, with one end facing the upper surface of the elevating section. Since the sensor is provided extending in the direction of the sensor, and a lift control switch that responds to the detection unit is provided on the side of the storage unit, the entire device can be made thin and does not require troublesome adjustments. , which can be easily assembled.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, in which Fig. 1 is a partially cutaway front view, Fig. 2 is a bottom view, Fig. 3 is a side view, and Fig. 4 is a side view seen from another different direction. FIG. 5 is a front sectional view of the main parts, FIG. 6 is an explanatory diagram of the operation of the elevating part, the lock mechanism, and the elevating/lowering control switch, and FIG. 7 is a circuit diagram of the ascending/descending switching control device. (1)... Chassis, (2)... Winding device. (3)...Storage part, (4)...Opening part. (5)...Lock mechanism, (6)...Cable. (7)... Lifting section, (9)... Detection lever.

Claims (1)

[Scope of Claims] Chassis; A winding device attached to the upper surface of the chassis; A storage section having an opening on the lower surface and attached to the lower surface of the chassis; A winding device installed inside the storage section; a locking mechanism; a cable wound on the winding device; a cable suspended by the cable on the lower surface side of the chassis, which rises in response to normal rotation of the winding device, and extends to the opening of the storage section; an elevating section that is stored in the storage section and locked by the locking mechanism and that descends in response to the reversal of the winding device; a detection lever that is movably supported and has one end facing the upper surface of the elevating section and is linked to the lifting/lowering operation of the elevating section; A lifting device characterized by comprising a control switch and;