JPH10157989A - lift device - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To provide, for example, an elevating device used for an underfloor storage, etc., in particular, an elevating device provided with an elevating mechanism such as a pantograph mechanism for elevating and lowering an article storage case or the like, and driving the elevating mechanism by a motor. In this regard, the lifting mechanism can be favorably raised without necessarily using a motor having a large torque. SOLUTION: In an elevating device provided with an elevating mechanism 7 such as a pantograph mechanism, and the elevating mechanism 7 is driven by a motor 20, when the elevating mechanism 7 is started up by the motor 20, the motor 20 is started. The above-described ascent operation is started after rotating by a predetermined rotation angle in a substantially no-load state. Specifically, for example, the elevating mechanism 7 is provided on the output shaft 21 of the motor 20.
Are provided rotatably, and engagement members are provided which engage with each other when the motor rotates by a predetermined angle to allow transmission from the output shaft 21 to the drive gear 24.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an elevating device for use in, for example, an underfloor storage, and in particular, an elevating mechanism such as a pantograph mechanism for elevating and lowering an article storage case, and the elevating mechanism is driven by a motor. Related to the device.

[0002]

2. Description of the Related Art Conventionally, there has been known an apparatus provided with an elevating device for facilitating an operation of storing or taking out an article in an underfloor storage, for example, in an underfloor storage. There is also known an apparatus provided with an elevating mechanism such as a pantograph mechanism for elevating and lowering a storage case and the like, wherein the elevating mechanism is driven by a motor.

[0003]

However, in the above elevating device, when the elevating mechanism is raised by driving the motor from a state where the elevating mechanism is lowered, a large load is applied to the motor. When many articles or the like are placed on the upper part of the elevating mechanism, there is a possibility that the articles cannot be lifted. In this case, a motor having a large torque may be used, but there are disadvantages such as an increase in cost, an increase in size, and difficulty in installation in a limited space such as a storage space under the floor.

[0004] The present invention has been proposed in view of the above problems, and has as its object to provide a lifting device capable of favorably driving a lifting mechanism without necessarily using a motor having a large torque. .

[0005]

In order to achieve the above object, a lifting device according to the present invention has the following configuration.

That is, in an elevating device provided with an elevating mechanism such as a pantograph mechanism and the elevating mechanism is driven by a motor, when the elevating mechanism is started by the motor, the motor is rotated by a predetermined rotation angle. The above-described ascent operation is started after the rotation is performed in a substantially no-load state.

[0007]

As described above, when the ascending operation is started, the motor is rotated by a predetermined rotation angle almost without load, and then the ascending operation is started. During this time, the rotation speed of the motor increases, and thereafter, the operation of raising the elevating member is started, so that the elevating member can be satisfactorily driven even by a motor having a small torque.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a lifting device according to the present invention will be described.
A specific description will be given based on the embodiment shown in the drawings.

The embodiment shown in the drawings shows an example in which the lifting device according to the present invention is applied to a storage device under the floor, FIG. 1 is a front view of a storage device under the floor to which the lifting device according to the present invention is applied, and FIG. FIG. 3 is a front view of a state where the lifting device is lowered, FIG. 4 is a side view thereof, FIG. 5 is an enlarged plan view of a main part, and FIG.
5A is a cross-sectional view taken along line AA in FIG. 5, and FIG.

In the drawing, reference numeral 1 denotes a floor, 1a denotes an opening formed in the floor, and an opening / closing lid 2.2 constituting a part of the floor can be opened / closed in the opening 1a by a hinge or the like omitted in the drawing. It is provided in. A support member 6 is attached to the beam member 3 below the opening 1a via a bracket 4 and a support rod 5.
A box-shaped article storage case 8 having an upper surface opened via a lifting mechanism 7 is provided on the support member 6 so as to be vertically movable.

In the present embodiment, a pantograph mechanism is used as the elevating mechanism 7.
Is a pair of upper and lower rails 9.9 and 10.1
0 and stays 11 and 12 arranged between the upper and lower rails 9 and 10 in an X-shape. Each of the lower rails 10 is arranged and fixed on the support member 6 via a horizontal member 13, and the article storage case 8 is arranged and fixed on an upper surface of the upper rail 9 via a horizontal member 14 as a movable pedestal. I have.

An intersection of each of the stays 11 and 12 is rotatably connected to each other by a connecting shaft 15 such as a bolt, and a lower end of the stay 11 is a bracket 1 provided on a lower rail 10.
The upper end of the stay 12 is rotatably connected to a bracket 9a provided on the upper rail 9 by a connecting shaft 16 such as a bolt. The upper end of the stay 11 and the lower end of the stay 12 are configured to be movable along the upper rail 9 and the lower rail 10 by rollers 17 and 18 rotatably provided via support shafts 17a and 18a, respectively. .

As shown in FIG. 5, a motor support frame 19 is provided at the lower end between the left and right stays 12, 12 on the support shaft 18.
a so as to be able to swing around the motor a.
9 is provided with a motor 20. In this embodiment, the motor 20 is a reversible motor having a built-in speed reducer. On both left and right sides of the motor 20, screw rods 22 are rotatably provided.
Is screwed into a female screw hole 23a of an arm 23 provided between the left and right stays 11 and 11. The arm 23 is rotatably connected to and held by the stays 11 via a horizontal shaft or the like.

A drive gear 24 is provided on the output shaft 21 of the motor 20 as shown in FIGS. 5 and 6 (a), and a driven gear 25 meshing with the drive gear 24 is provided on each screw rod 22.
It is integrally attached to. The driving gear 24 is rotatably fitted to the output shaft 21 so as to be rotatable.
A rotating disk 26 is provided on the side opposite to the motor 20. The rotating disk 26 is integrally fixed to the output shaft 21 by a key connection or the like not shown in the drawing.
In contrast, the drive gear 26 is rotatable. An engagement projection 27 is provided on the peripheral surface of the rotating disk 26, and an engagement pin 28 that engages with the projection 27 is provided on the drive gear 24.

In FIG. 1 and FIG. 2, reference numeral 30 denotes the opening / closing lids 2.2 in conjunction with the elevating operation of the elevating mechanism 7.
The two ends of the link 30 are provided with a bracket 31 fixed to the cross member 14 and the opening / closing lid 2.
Are connected via a shaft pin, a long hole, and the like, respectively, to a plate 32 attached to the lower surface of the.

In the above configuration, when the motor 20 is rotated in the reverse direction to lower the lifting mechanism 7 as shown in FIGS. 3 and 4, and the article storage case 8 is lowered most, the engagement pin 28 6A is in contact with one side surface of the engagement protrusion 27 as shown in FIG. When the motor 20 is rotated forward in this state, the rotating disk 26 rotates in the direction of arrow a in the figure. At this time, the engagement projection 27 provided on the rotating disk 26 rotates in a direction away from the engagement pin 28 on the drive gear 24, and power is not transmitted to the drive gear 24. Therefore, the rotation operation of the motor 20 is started with almost no load.

When the motor 20 continues to rotate, the rotating disk 26 also rotates while gradually accelerating. When the rotation is sufficiently accelerated, the projection 27 comes into contact with the engaging pin 28 and the driving gear 24 rotates in the same direction. I do. As a result, the driven gears 25 and 25 and the screw rod 22 meshing with the drive gear 24
22 rotates in the direction of the arrow b, the arm 23 into which each screw rod 22 is screwed, and the stay 11 of the lifting mechanism 7.
The article storage case 8 is pushed upward through the members 12 and the like, and the ascending operation is started.

As described above, in the present invention, the motor 20 is used when the article storage case 8 is raised by the lifting mechanism 7.
During the initial rotation, the rotation of the article storage case 8 by the elevating mechanism 7 is started when the rotation of the article storage case 8 by the elevating mechanism 7 is started at a predetermined rotation angle and sufficiently accelerated. Even when a large number of articles are placed on the storage case 8, it can be easily raised.

When the article storage case 8 is lifted by the lifting mechanism 7 as described above, the opening / closing lids 2 are automatically opened upward through the link 30 or the like in conjunction therewith. Also, when lowering the article storage case 8, the motor 20 may be rotated in the opposite direction to the above, whereby the article storage case 8 is lowered in the reverse order as shown in FIGS. , The upper surface of which is the open / close lid 2.2
It is automatically closed by. At this time, the engagement protrusion 27
The engagement pin 28 returns to the state shown in FIG. 6A and stops.

The elevating mechanism 7 is provided with a limit switch, a stopper mechanism, and the like for describing the ascending and descending ranges, but these are omitted in the drawing. In addition, the above-mentioned lifting mechanism 7
If the motor 20 stops for some reason during the ascent or descent operation, a large load may be applied to the motor 20 when the ascent operation is started from that state. In such a case, for example, The motor 20 may be once rotated in the direction opposite to the direction in which the elevating mechanism 7 is raised, and then rotated in the direction in which it is raised. Such an operation may be automatically performed by a control device or the like.

Furthermore, in the above-described embodiment, the motor 20 is rotated by a predetermined rotation angle in a substantially no-load state at the time of initial rotation of the motor 20 when the article storage case 8 is lifted, and then the drive gear 24 is rotated from the output shaft 21 of the motor 20. As a means for transmitting power to the drive gear 24, an engagement pin 28 is provided on the drive gear 24, and an engagement protrusion 27 for engaging with the engagement pin 28 is provided on the rotating disk 26.
For example, as shown in FIG. 6B, a concave portion 29 with which the engaging pin 28 engages may be formed in the rotating disk 26, or a long hole or the like may be formed instead of the concave portion. Alternatively, such a long hole may be provided in the drive gear 24, and a projection, a pin, or the like engaged with the drive gear 24 may be provided in the rotating disk 26. Further, the above-mentioned engaging means can be provided between the output shaft 21 and the driving gear 24.

The elevating mechanism 7 is preferably provided with a spring or the like which constantly moves and urges the cross member 14 and the article storage case 8 etc. as required. Tension coil spring 3 between support frame 19 and cross member 13
6 is provided. When the above-described spring 36 is provided, the load when the article storage case 8 is raised by the motor 20 can be further reduced.

Further, in the above embodiment, the lifting mechanism 7 is suspended from the beam 3 provided on the lower surface of the floor 1 via the support rods 5 and the support members 6 and the like. In some cases, a concave portion for storing under the floor is formed on the ground or the like, and the lifting mechanism 7 is directly mounted and fixed on the bottom surface of the concave portion. In the illustrated example, the lifting device according to the present invention is applied to the underfloor storage. However, the invention is not limited to the underfloor storage, and can be applied to other various lifting devices.

[0024]

As described above, the elevating device according to the present invention operates the motor 20 in a substantially no-load state by a predetermined rotation angle when starting the elevating operation of the article storage case 8 or the like by the elevating mechanism such as the pantograph mechanism. Since the above-described rising operation is started after the rotation, the load applied to the motor 20 during the initial rotation can be reduced, and the motor 2
0 is a predetermined angle and the rotation speed of the motor 20 is sufficiently increased to start the ascending operation. Therefore, even if the motor has a small torque, or if a large number of articles are stored in the article storage case 8 or the like. In addition, it is possible to smoothly and easily raise the drive. Further, since it is not necessary to use a large motor having a torque larger than necessary, there is an effect that it is economical and can be easily installed in a narrow space such as a storage space under the floor.

[Brief description of the drawings]

FIG. 1 is a front view showing an embodiment of a lifting device according to the present invention.

FIG. 2 is a side view of the embodiment.

FIG. 3 is a front view of a state where a lifting member is lowered.

FIG. 4 is a side view of a state where a lifting member is lowered.

FIG. 5 is an enlarged plan view of a main part.

FIG. 6A is a sectional view taken along line AA in FIG. (B)
Is the same diagram as in the above example, partially modified.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Floor 2 Opening / closing lid 3 Beam 4 Bracket 5 Support rod 6 Support member 7 Elevating mechanism 8 Article storage case 9, 10 Rail 11, 12 Stay 15, 16 Connecting shaft 17, 18 Roller 20 Motor 22 Screw bar 24 Drive gear 25 Follower Gear 26 Rotating disk 27 Engagement projection 28 Engagement pin

Claims (4)

[Claims] An elevating mechanism such as a pantograph mechanism,
In an elevating device in which the elevating mechanism is driven by a motor, when starting the elevating operation of the elevating mechanism by the motor, the motor is rotated by a predetermined rotation angle almost in a no-load state, and then the elevating operation is performed. An elevating device characterized by being configured to start. 2. A drive gear for driving the elevating mechanism on the output shaft of the motor is rotatably provided on the output shaft, and when the elevating mechanism is started to be raised by the motor, the output shaft of the motor is started. And an engagement member that engages with each other when the output shaft rotates by a predetermined angle and allows transmission of power from the output shaft to the drive gear. Item 6. The lifting device according to Item 1. 3. The lifting device according to claim 2, wherein a disk that rotates integrally with the output shaft is provided on the output shaft, and the engaging member is provided between the disk and the drive gear. . 4. The lifting device according to claim 1, further comprising an urging means for constantly urging the elevating mechanism to move upward.