JP2002219026A - Elevating unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an elevating unit which enables an elevating shelf to move up and down safely and reliably by hoisting the elevating shelf in a balanced manner according to the size of the elevating shelf without reference to a space for mounting the elevating unit so as to make the elevating shelf move up and down, and can be mounted inexpensively by simple execution by virtue of unitization. SOLUTION: A central unit case 6 comprises a winding shaft 5 connected to a motor 2 via a reduction gear 3. Right and left unit cases 8 and 8 are provided with pulleys 7 and 7 for guiding belts 4 and 4 which are wound around the winding shaft 5 and extended right and left. The unit case 6 and the unit cases 8 and 8, respectively, are constituted separately and independently so as to be fixed accordingly to a prescribed installation width. Additionally, the elevating shelf 9 is hoisted by the belts 4 and 4, and the elevating shelf 9 is made to move up and down in equilibrium by the belts 4 and 4 wound or wound back by driving the motor 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an elevating unit for elevating, for example, an elevating shelf of a hanging cabinet.

[0002]

2. Description of the Related Art Heretofore, there has been proposed an elevating shelf in which a shelf for storing tableware and the like provided in a kitchen is a suspending cabinet which can be moved up and down, which is lowered when taking things in and out, and is raised at other times. ing.

[0003] Such lifting shelves are not limited to kitchens, but are used for applications in which various shelves can be moved up and down as needed, as a device for efficiently using a work space in a study or a factory. Can also be used.

A lifting device used for such a lifting shelf has a structure in which wires and belts are attached to both left and right ends of the lifting shelf, and the wires and belts are wound by a motor.

When a wire is used, it is necessary to make the winding amount of the wire equal to the left and right in order to raise and lower the lifting shelf in a well-balanced manner. For this reason, the right and left wires are wound in an aligned winding, but it is difficult to completely perform the aligned winding.

Further, when the left and right sides of the lifting shelf are lifted by wires, it is difficult to maintain the balance of the lifting shelf because the wires are supported at points. On the other hand, friction occurs, and the friction noise at this time causes noise.

[0007] In order to solve the problems that occur when such wires are used, the present applicant has already filed an application for a lifting unit that is lifted using a belt (Japanese Patent Application No. 2000-8482).

In this apparatus, as shown in FIG. 6, a motor 22 is fixed to a unit case 21 fixed to a ceiling or a wall or the like (in the figure, a top plate of an outer box 20). The winding shaft 2 is connected to the output shaft 23 via a reduction mechanism.
4, and left and right belts 25, 25 each having one end fixed to the winding shaft 24, are wound around pulleys 26, 26 attached to both ends of the unit case 21.

In this apparatus, the lifting shelf 27
The left and right belts 25, 25 are hung on pulleys 29, 29 provided respectively on the mounting brackets 28, 28 fixed to both ends of the top plate, and the ends of the respective belts 25, 25 are attached to both ends of the unit case 21. Fixed to a fixed shaft 30 fixed to the
The lifting shelf 27 is raised or lowered by winding and rewinding the belts 25, 25 by the drive of No. 2.

Further, as guides for stopping the raising and lowering of the lift shelf 27, guide fittings 31, 31 are fixed on both sides of the lift shelf 27, and the respective guide fittings 31, 31 are fixed.
Guide rails 32, 3 fixed to both sides of outer box 20
It moves along 2.

[0011]

In the above elevating unit, a motor 22 and a winding shaft 24 connected to the motor 22 are provided substantially at the center of a long unit case 21.
And pulleys 26, 2 near both ends of the unit case 21.
6 are provided, but the space for mounting this device is restricted by the length of the unit case 21, and this device is mounted in a place narrower than the standardized length of the unit case 21. It is impossible.

In order to solve this problem, a unit case having a length corresponding to the mounting space and the size of the elevating shelf may be prepared, and a motor, a pulley and the like may be mounted at a predetermined position. There is no advantage of unitization, and there is a problem in that it is troublesome in production, or transportation and assembly work is troublesome.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and is intended to raise and lower a lifting shelf in a well-balanced manner according to the size of the lifting shelf, regardless of the mounting space of the lifting unit. It is another object of the present invention to provide a lifting unit capable of safely and reliably moving the lifting rack up and down, and being unitized to be installed at a low cost with simple construction.

[0014]

According to a first aspect of the present invention, there is provided a lifting unit having a central unit case including a winding shaft connected to a motor via a speed reducer. The left and right unit cases each having a pulley for guiding the belt extended to the right and left wound by the winding shaft have a configuration independent of each other, so that each unit case is fixed according to a predetermined installation width. The lifting shelf is lifted by the left and right belts, and the motor is driven to move the lifting shelf up and down in equilibrium by the left and right belts that are wound or unwound.

According to a second aspect of the present invention, in the first aspect, the left and right extended belt wound by the rotation of the winding shaft is formed in a diameter direction of the winding shaft. It is characterized in that one belt is inserted through the through hole.

According to a third aspect of the present invention, there is provided the elevating unit according to the first aspect, wherein the left and right belts are hung on pulleys provided at both ends of the elevating rack, and the respective ends of the respective belts are moved right and left. It is characterized by being fixed to the unit case.

Further, the lifting unit according to claim 4 of the present invention is characterized in that in claim 1, each end of the left and right belts is fixed to both ends of the lifting rack.

[0018]

Embodiments of the present invention will be described below with reference to the drawings.

As shown in FIGS. 1 to 3 (FIG. 1 is shown in perspective, and a motor and a speed reducer are omitted for clarity of illustration), the lifting unit 1 according to the present invention is shown in FIGS. A central unit case 6 including a winding shaft 5 connected to the motor 2 via a speed reducer 3, a pulley 7 for guiding left and right extended belts 4 and 4 wound by the winding shaft 5, The left and right unit cases 8, 8 having the respective units 7, 8 are separated and independent from each other, so that the unit cases 6, 8, 8 are fixed according to a predetermined installation width, and are moved up and down by the left and right belts 4, 4. The shelf 9 is lifted up, and the motor is driven so that the left and right belts that are wound or unwound move up and down the shelf 9 in an equilibrium manner.

A detailed description of such a configuration is as follows.
The elevating shelf 9 shown in FIG. 1 is lifted and lowered while being housed in the outer box 10, and a reinforcing top plate 11 is fixed along the center of the upper plate of the outer box 10. , A central unit case 6 and left and right unit cases 8, 8 are attached.

Each of the unit cases 6, 8, 8 can be attached directly to the outer box 10 or to the ceiling or wall of a house, in addition to the outer box 10 or the top plate 11 fixed thereto. It may be fixed.

Each of the unit cases 6, 8, 8 is formed of a rectangular frame having a U-shaped cross section with a lower part opened, and the central unit case 6 is left and right by an amount corresponding to the mounting of the control device 19 (see FIGS. 2 and 3). Are formed longer than the unit cases 8 and 8.

On the upper surfaces of the respective unit cases 6, 8, 8, screw holes 12, 12,... Are provided at necessary locations, and screws (not shown) are provided at the top plate 11, or at predetermined mounting locations. The left and right unit cases 8, 8 are fixed according to the mounting space of the lifting shelf 9 or the size of the lifting shelf 9.
Can be set.

As shown in FIG. 2 or FIG. 3, the motor 2 is fixed to the outside of the
Is connected to a take-up shaft 5 rotatably supported on both sides of a central unit case 6 via a speed reducer 3.

Although not shown in the drawings, a worm is provided inside the drive mechanism on the rotating shaft of the motor 2, and a reduction gear is connected to a worm wheel meshed with the worm. The winding shaft 5 is connected.

The motor 2 is a geared motor, and exerts a braking function when the motor 2 is stopped. However, when a motor having no brake function is used, another stop function may be added to the speed reduction mechanism or the like.

The winding shaft 5 is formed in a bobbin shape having flanges on both sides, and one end of each of the left and right belts 4, 4 is fixed to the periphery of such a winding shaft 5 by screws or the like. By the drive of No. 2, it is wound coaxially around the outer periphery of the winding shaft 5.

As the belts 4 and 4, polyester belts and steel belts can be used. The length can be freely set according to the rising or lowering height of the lifting shelf 9.

Further, in the present invention, as shown in FIG. 4, a through hole 5a is formed in the diameter direction of the winding shaft 5, and a single belt 4 'is inserted through the through hole 5a so as to extend in the left-right direction. Can be extended.

In this embodiment, the portion of the belt 4 in such a configuration extending in the left-right direction from the winding shaft 5 is referred to as the left and right belts 4 and 4 as described above.

The belt 4 'is preferably a foldable belt such as a polyester belt.
As shown in (2), when the winding shaft 5 rotates by driving the motor 2, the diametrical through hole 5 rotates to wind the belt 4 around the winding shaft 5, and the left and right belts 4, 4 are wound up, or The lifting shelf 9 can be raised and lowered by rewinding.

If the belt 4 'is inserted through the through hole 5a formed in the diameter direction of the winding shaft 5 as described above, the belt 4' is fixed to the winding shaft 5. In this configuration, the mounting position of the central unit case 6 does not need to be strictly specified, so that the mounting operation of the central unit case 6 is facilitated.

As shown in FIG. 3, pulleys 7, 7 having flanges at both ends are provided in the left and right unit cases 8, 8, and both ends of each support shaft of the pulleys 7, 7 are respectively connected to the unit cases 8, 8, respectively. Are rotatably supported on both sides.

With such a configuration, the left and right belts 4, 4 wound around the winding shaft 5 are connected to the left and right unit cases 8, 8.
Can be guided on each of the pulleys 7 and 7.

In FIG. 1 to FIG. 3, mounting brackets 13 and 13 are fixed to both ends of the upper surface of the lifting shelf 9 by screws, and are mounted on bearing frames 14 and 14 fixed to the respective mounting brackets 13 and 13 so as to be adjustable in position. Pulleys 15 and 15 are provided, and the ends of the respective belts 4 and 4 hanged on the respective pulleys 15 and 15 are fixed to fixed shafts 16 and 16, and the fixed shafts 16 and 16 are fixed to the left and right unit cases 8 and By fixing it to the screw 8
The pulleys 15 on the lifting shelf 9 side function as moving pulleys.

Although not shown, the belts 4, 4 hanging from the pulleys 7, 7 of the left and right unit cases 8, 8 described above.
Each end of the rack 4 may be welded to metal fittings fixed to both ends of the upper surface of the rack 9 so that the rack 9 can be directly lifted by the left and right belts 4, 4.

In the above configuration, the three unit cases, namely, the central unit case 6 and the left and right unit cases 8, 8, are separated and independent from each other. The mounting position of the central unit case 6 can be determined between 8, 8 and substantially in the middle thereof, and the mounting operation can be completed only by fixing it to a predetermined mounting location with screws.

When the lifting unit according to the present invention is mounted in a narrow installation space, the distance between the central unit case 6 and the left and right unit cases 8, 8 is reduced, and the left and right belts 4, 4 have extra length. However, this extra length can be dealt with by winding it up on the winding shaft 5 of the central unit case.

Guide brackets 17, 17 are fixed to the side surfaces of the bearing frames 14, 14 provided on both sides of the elevating shelf 9, and are vertically fixed to both inner side surfaces of the outer box 10. The elevator shelf 9 is moved while being guided along 18, 18 so as to serve as a steady rest when the elevating shelf 9 moves up and down in a balanced manner.

When the motor 2 of the elevating unit 1 of FIG. 1 configured as described above is rotated upward, the left and right belts 4, 4 are wound around the winding shaft 5 and hang down on both ends of the elevating shelf 9. When the lifted belts 4 are evenly pulled up, the pulleys 15 on both sides of the lifting shelf 9 function as moving pulleys, and the lifting shelf 9
Is raised to equilibrium.

Further, by rotating the motor 2 of the elevating unit 1 in the downward direction, the respective belts 4
Belts 4 and 4 suspended from both ends of the lifting shelf 9
The length of the lifting shelf 9 can be lowered in an equilibrium manner by uniformly extending the length of the lifting shelf 9.

In the structure of this embodiment, since the separate belt 4 or the single belt 4 'is formed in a thin belt shape, it is sequentially wound in the winding direction when winding around the winding shaft 5. It can be aligned, does not have a cross-like overlap like a conventional wire, has high strength, and can safely move up and down even with a fairly large lifting shelf 9,
Alternatively, it can be stopped at a fixed position.

[0043]

As described above, the elevating unit according to the present invention comprises a central unit case including a motor, a speed reducer, and a winding shaft to which one end of a belt extending left and right is fixed, and a left and right extending unit. Since the left and right unit cases provided with the pulleys for guiding the respective belts have a configuration separated and independent, it is possible to fix each unit case according to a predetermined installation width.

Further, since the lifting shelves are lifted in equilibrium by the left and right belts guided by the pulleys of the left and right unit cases, the lifting shelves can be lifted in a well-balanced manner in accordance with the size of the lifting shelves, thereby ensuring safe and reliable operation. The vertical movement of the lifting rack is enabled, and the entire lifting unit according to the present invention is unitized, so that it is possible to mount the lifting rack easily and at low cost.

Further, in the present invention, the belt wound around the winding shaft has a left and right independent configuration, and extends left and right by being inserted into a through hole formed in the diameter direction of the winding shaft. In this case, when one belt is used, the structure of the elevating unit is further simplified, and it is not necessary to strictly specify the mounting position of the central unit case. .

As a configuration for lifting the lifting rack with the left and right belts, the left and right belts are hung on pulleys provided at both ends of the lifting rack, and the ends of the respective belts are fixed to the left and right unit cases. Each end of the belt may be fixed to the left and right unit cases.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a lifting unit according to the present invention, in which each component is shown in a transparent manner.

FIG. 2 is a front view of a lifting unit according to the present invention.

FIG. 3 is a top view of a lifting unit according to the present invention.

FIG. 4 is a schematic perspective view showing another embodiment of the winding shaft and the belt in the lifting unit according to the present invention.

FIG. 5 is a sectional view taken along line AA of FIG. 4;

FIG. 6 is a perspective view of a conventional elevating unit.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Elevating unit 2 ... Motor 3 ... Reduction gear 4, 4 '... Belt 5 ... Winding shaft 5a ... Through-hole 6 ... Center unit case 7 ... Pulley 8 ... Left and right unit cases 9 ... Elevating rack 10 ... Outer box 11 ... Top plate 12 ... Screw hole 13 ... Mounting bracket 14 ... Bearing frame 15 ... Pulley 16 ... Fixed shaft 17 ... Guide bracket 18 ... Guide frame

Claims (4)

[Claims] 1. A central unit case having a winding shaft connected to a motor via a speed reducer, and a left and right unit having a pulley for guiding a belt extending left and right which is wound by the winding shaft. Each unit case is separated and independent from each other so that each unit case is fixed in accordance with a predetermined installation width, and the lifting shelf is lifted by the left and right belts, and the motor is driven to wind or wind. An elevating unit, wherein the elevating rack is raised and lowered in equilibrium by the left and right belts returned. 2. A belt extending right and left, which is wound by rotation of the winding shaft, is formed by inserting a single belt into a through hole formed in a diameter direction of the winding shaft. The lifting unit according to claim 1, wherein 3. The left and right belts are hung on pulleys provided at both ends of the elevating rack, and each end of each of the belts is fixed to the left and right unit cases. The lifting unit as described. 4. The lifting unit according to claim 1, wherein each end of said left and right belts is fixed to both ends of said lifting rack.