JPH0545242Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] This invention relates to an elevating device for lifting and lowering an inner storage body housed in an outer storage body such as a hanging cabinet, and particularly relates to a lifting device for lifting and lowering an inner storage body such as a hanging cabinet. The present invention relates to an elevating device that has a function of preventing an inner storage body from falling due to cutting of a wire or the like.

[Prior art]

As is well known, there is an elevating device configured to suspend an inner storage object housed in an outer storage object such as a hanging cabinet using a wire, and to raise and lower the inner storage object by winding up or unwinding the wire. , various methods have been proposed.

By the way, in the case of such a wire-suspended lifting device, if the wire suspending the inner storage object breaks, it would be very dangerous if the inner storage object were to fall, so various methods have been used in the past. Safety devices are installed.

As elevating devices equipped with such a safety device, elevating devices as shown in FIGS. 8 to 11 are known.

As shown in FIGS. 8 and 9, this lifting device consists of two wires 2 that suspend the inner storage body 1.
a, 2b, a motor 3 that raises and lowers the inner storage body 1 by winding up or unwinding the wires 2a, 2b, and a slack detection device that detects slack in the wires 2a, 2b and stops the motor 3. 6 and
It was composed of.

The wires 2a and 2b are each formed to have a strength capable of withstanding the load of the inner storage body 1, and the lower ends thereof are connected to the upper end portion of the inner storage body 1.

Further, the upper end of the wire 2a is wound around the pulley 4 of the motor 3, and the upper end of the wire 2b is wound around the pulley 4 of the motor 3 via the direction return pulley 5. Therefore, by rotating the motor 3 forward and backward, the wires 2a, 2b
was configured to raise and lower the inner storage body 1 with the same stroke.

Further, as shown in FIGS. 10 and 11, the relaxation detection device 6 includes an arm 8 rotatably supported on a shaft 7, and a roller 8a rotatably supported on one end of the arm 8. a spring 9 disposed at the other end of the arm 8 and urging the roller 8a in the direction of the wire; and a micro switch SW that controls the motor 3 to turn on and off in accordance with the rotational state of the arm 8. , was composed of.

Therefore, when the wires 2a, 2b are not cut, the wires 2a, 2b maintain a tensioned state as shown in FIG. 10, so the roller 8a is moved by the wires 2a, 2b. 10th
Pushed to the right in the figure, the arm 8 resists the biasing force of the spring 9 and sets the micro switch SW to the OFF state. Thereby, the motor 3 is rotated in forward and reverse directions by a switch not shown, and the inner storage body 1 can be raised or lowered to an arbitrary position.

On the other hand, if one of the wires 2a, 2b breaks due to some kind of accident, or an obstacle comes into contact with the lower surface of the inner storage body 1, the wires 2a, 2b
If the wires 2a, 2b come loose from the pulleys 4, 5 for some reason, the wires 2a and/or 2
11, the roller 8a is rotated to the left in FIG. 11 by the urging force of the spring 9, and the arm 8 presses the micro switch SW to turn it ON. As a result, the motor 3 is set to the OFF state, and the motor 3 is turned off.
The drive was configured to be stopped immediately.

[Issues with conventional technology]

However, in the case of the lifting device equipped with the above-mentioned conventional loosening detection device, although it is possible to detect a state in which the wire is cut and loosened, it does not have the function of supporting the inner storage body in place of the broken wire. For example, if all the wires break at the same time, the support for the inner housing will be lost, which is very dangerous, and the conventional loosening detection device described above has the problem that the electrical circuit However, there was a problem in that there remained concerns about the reliability and durability of limit switches and the like.

This invention was devised in view of the current situation, and its purpose is to mechanically securely lock the inner storage body in place of the broken wire even if the wire breaks. The object of the present invention is to provide a lifting device equipped with a locking device that is safe and highly reliable in operation.

[Means to solve the problem]

In order to achieve the above object, this invention includes a wire that suspends the inner storage body housed in the outer storage body, and a drive device that raises and lowers the inner storage body by winding up or unwinding the wire. and,
In the lifting device, the lifting device includes an arm having one end rotatably supported on the top plate of the inner storage body, and an arm rotatably supported on the other end of the arm. A stopper, a support member rotatably supporting the stopper, and a spring tensioning the stopper in the locking direction are disposed, and the lower end of the wire is connected to the arm. It is characterized by being connected to.

[Effect]

Therefore, in the lifting device according to this invention,
If the wire suspending the inner storage body breaks, the stopper rotates due to the biasing force of the spring and frictionally engages with the inner wall surface of the outer storage body.
The inner storage body can be locked and held on the outer storage body.

〔Example〕

This invention will be described in detail below based on an embodiment shown in the accompanying drawings.

As shown in FIGS. 1 to 6, the lifting device A according to this embodiment includes an outer storage body 10 such as a hanging cabinet, etc.
The inner storage body 11 is housed in the outer storage body 10 so that it can be raised and lowered, the two wires 12a and 12b that suspend the inner storage body 11, and the wires 12a and 12b are rolled up or rolled up. a motor 13 that raises and lowers the inner storage body 11 by returning it;
It is comprised of a locking device 20 having a stopper 24 that rotates and engages with the inner wall surface 10a of the outer storage body 10 when the wires 12a, 12b are cut.

The outer storage body 10 and the inner storage body 11 are, for example,
It is composed of a box or the like having a generally concave cross section, and the inner storage body 11 is housed inside the outer storage body 10 so as to be vertically movable.

Each of the wires 12a and 12b is formed to have a strength that can withstand the load of the inner storage body 11, and the lower end thereof is connected to the arm of the locking device 20, as shown in FIG. 21 are connected.

Further, the upper ends of the wires 12a and 12b are connected to a pulley 13a of the motor 13 via pulleys 14 and 15.
is wrapped in.

Therefore, by rotating the motor 13 in forward and reverse directions,
The wires 12a and 12b are configured to move the inner storage body 11 up and down with the same stroke.

As particularly shown in FIG. 2, the locking device 20 includes a support 22 fixed to the top plate 11a of the inner storage body 11, a shaft 23 supported by the support 22, and one end. The substantially L-shaped arm 21 is rotatably supported on the shaft 23, and the stopper 24 is rotatably supported on the other end of the arm 21 via a shaft 25. , a support body 27 which rotatably supports this stopper 24 via a shaft 26, and a spring 2 which tensions and biases the stopper 24 in the locking direction (clockwise in FIG. 3).
8, and the support body 27 is composed of:
The wires 12a and 12b are fixed to the top plate portion 11a of the inner storage body 11, and the lower ends of the wires 12a and 12b are connected to the arm 21.

The stopper 24 has a locking side 29 that is
As shown in FIG. 3, it is formed eccentrically.
When the stopper 24 is in a horizontal state, that is, when the wire 12
When the wires a and 12b are not cut, the arm 21 is
is maintained in a horizontal state against the biasing force of the spring 28, the locking side 29 is separated from the shaft 26.
The distance d from the shaft 26 to the inner wall surface 10a of the outer storage body 10 is smaller than the distance D (d<D).
It is formed to be. Also, wire 12
a, 12b are cut, and the wire 1
When the tensile forces of 2a and 12b are no longer applied and the arm 21 is rotated by the biasing force of the spring 28, the distance d' from the shaft 26 to the locking side 29 changes from the shaft 26 to the outer storage body 10. inner wall surface 10 of
It is formed to be larger than the distance D to a (D<d'). Therefore, the wire 12a,1
2b is broken, the locking side 2 of the arm 21
9 frictionally engages with the inner wall surface 10a of the outer storage body 10, thereby preventing the inner storage body 11 from falling.

The spring 28 normally urges the stopper 24 to be pulled clockwise in FIG. 3 with the shaft 26 as a fulcrum.

Next, the operation of the elevating device configured as described above will be explained.

First, when the wires 12a and 12b are in tension, the arm 2
1 is maintained in a horizontal state, the stopper 24 does not come into contact with the inner wall surface 10a of the outer storage body 10, and the inner storage body 11 is guided up and down by the drive of the motor 13.

On the other hand, if the wires 12a, 12b break, as shown in FIG. The stopper 2 rotates around the shaft 26 as a fulcrum.
The locking side 29 of No. 4 is connected to the inner wall surface 10 of the outer storage body 10.
Since it is frictionally engaged with a, the inner storage body 11 is prevented from falling.

Incidentally, when the wires 12a, 12b are cut, an alarm device (not shown) may be activated in synchronization with the breakage. As this alarm device, an alarm device having a known configuration, such as a type that flashes a lamp or a type that sounds a buzzer, can be applied.

FIG. 7 shows another example of the locking device 20 according to the above embodiment, and in this example, the stopper 2
4's locking side 29 and the inner wall surface 10 of the outer storage body 10
The other configurations and functions are the same as those of the embodiment shown in Figs. Therefore, the same reference numerals as in the above-mentioned embodiments are used in the drawings, and detailed explanation thereof will be omitted here.

[Effect of idea]

As explained above, in the lifting device according to this invention, when the wire suspending the inner storage body is broken, the stopper is rotated by the biasing force of the spring and the inner wall surface of the outer storage body is rotated. Since it is configured to frictionally lock with the inner storage body, it is possible to reliably prevent the inner storage body from falling due to wire breakage, making it safe, and since it is composed only of mechanical elements, operation is reliable and reliable. In addition to its high performance, it also has many excellent effects, such as being easy to install on existing lifting equipment.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram showing a schematic configuration of a lifting device according to an embodiment of the invention, FIG. 2 is an explanatory diagram showing an enlarged view of a locking device portion of the lifting device, and FIG. 3 is a locking device. FIG. 4 is a side view showing the configuration of the stopper, FIG. 4 is a plan view showing the connection state between the stopper and the arm, FIG. 5 is a side view showing the locking device in the set state with the wire unbroken, The figure is a front view showing the operating state of the locking device, FIG. 7 is a partially cutaway front view showing another example of the locking device, and FIG.
The figure is a front view schematically showing the configuration of a conventional lifting device, FIG. 9 is a plan view of the same lifting device, and FIG. 10 is an explanation showing a schematic configuration of a relaxation detection device attached to the conventional lifting device. 11 are explanatory diagrams showing an example of the operation of the relaxation detection device. Explanation of symbols, A... Elevating device, 10... Outer storage body, 10a... Inner wall surface of outer storage body, 11...
Inner storage body, 12a, 12b...Wire, 13
... Drive device, 20 ... Locking device, 21 ... Arm, 24 ... Stopper, 26 ... Shaft, 28 ...
Spring, 29...Latching side part.

Claims (1)

[Scope of utility model registration request] An elevating device comprising a wire that suspends an inner storage body housed in an outer storage body, and a drive device that raises and lowers the inner storage body by winding up or unwinding the wire, An arm having one end rotatably supported on the top plate of the inner storage body, a stopper rotatably supported on the other end of the arm, and this stopper being rotatable. a support formed by supporting the shaft; a spring tensioning and biasing the stopper in the locking direction;
A lifting device characterized in that the lower end of the wire is connected to the arm.