JP2001199692A - Elevating device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an elevating device for a hanging shelf device or the like hanging an inner box by belts, having a small number of components, and hardly causing fatigue failure to a gear. SOLUTION: In this elevating device, one winding shaft 19 winds two belts 21 in a lap wind state (shown in Figure 1) or in an adjacent wind state. The inner box 5 vertically moves inside a fixed outer box 3. The tips of the two belts 21 wound up and off by the one winding shaft 19 rotated by a motor 16 provided to the outer box 3 are guided by slide members 23 or fixed pulleys of the outer box 3, and moving pulleys 25 of the inner box 5, and are returned to the outer box 3 and fixed. When the motor 16 rotates, the inner box 5 vertically moves with sliders 15 guided by slide rails 13 of the outer box 3, as the inner box 5 is hung by the belts 21. When the inner box 5 is slid to a set elevating position, the slider 15 contacts with a limit switch 31 to control the motor 16.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of a lifting device used in various fields such as a hanging cabinet and a clothesline.

[0002]

2. Description of the Related Art For example, an apparatus has been proposed in which a shelf for storing items such as tableware in a kitchen is a hanging shelf which can be moved up and down so as to be lowered when taking in and out the items, and to raise it at other times. . Also, the clothesline can be raised and lowered,
When not in use, or leave the laundry dry,
Drying apparatuses have been proposed that are raised above the high ceiling. Furthermore, there has been proposed a device that enables a tableware dryer to move up and down, and keeps the tableware up except when the tableware is taken in and out. By making it possible to move up and down in this way, a work space such as a kitchen can be secured.

[0003] Such an elevating device has a structure in which a wire or a belt is attached via pulleys to both left and right ends of an elevating body for elevating, and the wire or the belt is wound by a motor.

[0004] However, in the case of using a wire, various problems occur. That is, it is necessary to perform aligned winding on the winding shaft for winding the wire so that there is no unevenness in the winding state. If there are irregularities, there will be a difference in the amount of winding between the left and right wires, and this difference will cause the elevating body to tilt. It was very difficult to perform this alignment winding completely.

[0005] Further, since the wire is thin, the elevating body is supported at a point, and at any point in the axial direction of the winding shaft the winding of the wire changes from time to time. Therefore, the lifting body was apt to be unstable.

[0006] Furthermore, when the wire is wound, friction occurs between the wire and the wound wire, and a friction sound is easily generated.

In order to solve the problem caused by using such a wire, the applicant has already filed an application using a belt instead of the wire (Japanese Patent Laid-Open No. 10-1998).
95596, utility model registration 3054375). By using a belt, alignment winding can be easily performed to prevent the elevating body from tilting, and it can be supported on the belt surface to increase the stability of the elevating body. Since no friction occurs, the occurrence of friction can be prevented.

[0008]

However, in the elevating device using the belt which the applicant has already filed, the belts attached to both ends of the elevating body are wound on different winding shafts. , Two winding shafts are required.

Further, in order to transmit the rotational force of the motor to the two winding shafts, it is necessary to arrange a meshing pinion gear, and this pinion gear is concerned about the possibility of fatigue failure. . That is, for example, even when an elevating body such as a cupboard or a clothesline is not used, the pinion gear is always hung by a belt, and thus a large force is always applied to the pinion gear. For this reason, there is concern about the possibility of creep destruction, which is fatigue destruction, and a material having strength greater than that of a normal pinion gear must be used, which increases the cost of the apparatus.

Further, a plurality of winding shafts and pinion gears are required, and the number of parts increases.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and has as its object to provide an elevating device capable of reducing the possibility of fatigue fracture and reducing the number of parts.

[0012]

In order to solve the above problems, a first invention is to provide a belt attached to both ends of a lifting / lowering body via a sliding member or a pulley, and a belt for winding both belts. And a motor for rotating the take-up shaft and moving the elevating body up and down.

According to a second aspect of the present invention, the winding shaft further locks a central portion of a single belt and rotates the belt so that the central portion of the belt is wound one after another. A lifting device attached to both ends of a lifting pair.

According to a third aspect of the present invention, in the winding shaft, two lock portions for locking the tips of the two belts are adjacent to each other in the longitudinal direction of the shaft, whereby the two belts are adjacent to each other. The lifting device is characterized in that it is wound up.

According to a fourth aspect of the present invention, the elevating body is located below the fixed body, and a motor provided substantially at the center of the fixed body, and the one winding shaft rotated by the motor. A sliding member or a fixed pulley provided on the left and right of the fixed body for guiding the belt unwound from the winding shaft to the left and right, and a left and right sliding member for guiding the belt from the sliding member or the fixed pulley. And a fixing portion for fixing a belt from the moving pulley to the fixed body by returning the moving pulley to the fixed body.

According to a fifth aspect of the present invention, there is further provided an outer box having an open bottom as the fixed body, an inner box as an elevating body which moves up and down inside the outer box, and a left and right inner surface of the outer box. A slide rail provided, a slider guided by the slide rail and fixed to the left and right of the inner box, the motor provided substantially at the center of the inner upper surface of the outer box, and the first motor rotated by the motor. A take-up shaft, the belt wound and unwound by the single take-up shaft, and the sliding members or fixed pulleys provided on the left and right sides of the outer box for guiding the two belts left and right, The slide rail includes: a moving pulley provided on the left and right sides of the inner box for guiding a belt from the sliding member or the fixed pulley; and a fixing unit for fixing the belt from the moving pulley to the outer box. , Serial motor, said one winding shaft of
The two belts, the sliding member or the fixed pulley, and the fixed portion are integrally provided on one device base,
The elevating device is characterized in that the moving pulley provided on the belt is provided integrally with the slider.

According to a sixth aspect of the present invention, there are further provided a plurality of limit switches provided along the slide rail and in contact with the slider, an input means for arbitrarily selecting an ascending / descending position corresponding to the position of the limit switch, and A lift device comprising: control means for controlling a motor based on an input signal from an input means and a signal when the slider comes into contact with each limit switch.

A seventh aspect of the present invention is the elevating device, wherein the take-up shaft has one lock slit formed in a cylindrical body for inserting a central portion of one belt. .

According to an eighth aspect of the present invention, the winding shaft further has two lock slits formed in the cylinder to insert the tips of the two belts, and the tips of the two belts are folded back to form a cylinder. A lifting device having a shape portion and a lock rod for being inserted into the tubular portion in the inserted state.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described with reference to FIGS.

The elevating device 1 of this embodiment is used, for example, in a hanging cabinet. The outer box 3 as a fixed body is fixed to, for example, a ceiling or a wall of a kitchen. The outer box 3 has an open front and a bottom. Inside the outer case 3, the inner case 5 as an elevating body moves up and down. This inner box 5
The front is open.

An apparatus base 7 is mounted on the inner upper surface of the outer box 3 by screws or bolts and nuts through screw holes 9 (FIG. 2A). Slide rails 13 provided at both ends of the device base 7 are fixed to the inner left and right surfaces of the outer box 3. The slider 15 guided by the slide rail 13 is fixed to the left and right ends of the upper surface of the inner box 5.

A motor 16 is mounted laterally at substantially the center of the inner upper surface of the device base 7.
Is transmitted to one take-up shaft 19 via the worm gear 17. This one
The central portion of one belt 21 is locked to the take-up shaft 19, and the belt 2 is rotated by the rotation of the take-up shaft 19.
1 are wound up one after another from the center.

Both ends of the belt 21 are guided by sliding members 23 provided at the left and right ends of the apparatus base 7, further guided by a moving pulley 25 provided on the slider 15, and then returned to the apparatus base 7 again. Then, it is fixed to the fixing portion 27. For the fixing portion 27, a metal shaft or a large screw is used.

As shown in the sectional view of FIG. 4, at least one of the two slide rails 13 has not only a slide groove 28 in which a slide piece 15a for mounting the slider 15 slides, but also a limit switch 31.
The mounting groove 28a for mounting is formed. This mounting can be performed at any of a plurality of positions in the longitudinal direction of the slide rail 13 with screws or the like. The slider 15 has
A contact 15b for contacting the limit switch 31 is provided.

The signal from the limit switch 31 is
It is input to the control means in the control box 33.
A control switch (not shown) as an input means for selecting and inputting the elevation position of the inner box 5 is connected to the control box 33. The elevation of the inner box 5 arbitrarily input by the input means is controlled by the motor 16 based on this input signal and a signal when the slider 15 contacts the limit switch 31.

The slider 15 and the moving pulley 25 are attached to the inner box 5 via a mounting base 37 with bolts and nuts.

As shown in FIG. 6, the sliding member 23 has a shape such that the thread winding is halved in a plane passing through the shaft, and the belt 21 is made of a material that is easy to slip. Belts 21 at both ends
And a screw hole 23b through which a screw for mounting is passed is formed in the center.

As shown in FIG. 7, the winding shaft 19 is a cylindrical body, and lock slits 19a are opened on both side surfaces. One belt 21 passes through both lock slits 19 a, and the central portion of the belt 21 is located at the axis of the winding shaft 19. When the winding shaft 19 rotates in this state, the belt 21 is wound in a state where the belt 21 is sequentially stacked from the central portion.

(Operation) When an arbitrary elevation position stored by the remote controller 35 as input means is selected, the motor 16 is rotated by the control means, and the winding shaft 19 is rotated. Thereby, the belt 21 is wound up,
Alternatively, it is unwound and the inner box 5 moves up and down. Along with this elevating operation, when the slider 15 is guided and slid by the slide rail 13 and comes into contact with the limit switch 31 corresponding to the selected elevating position, the control means stops the rotation of the motor 16.

(Effects of the Embodiment) According to the above-described embodiment, the belt 21 is wound around the single winding shaft 19, so that two winding shafts are not required unlike the related art. This eliminates the need for a pinion gear for transmitting the rotational force of the motor to the two winding shafts, thereby eliminating the possibility of fatigue destruction caused by the pinion gear and reducing the number of parts.

Further, since the force is transmitted to the outer case 5 via the moving pulley 25, the force applied to the belt 21 is reduced by half compared with the conventional technology (the technology which the applicant has already applied for). Accordingly, the strength of the belt 21, the gear mechanism, the motor 16, and the like can be reduced, and the cost of the apparatus can be reduced.

Further, by winding the two belts 21 one on top of the other, the two belts 21 are straightened in a plan view as compared with the embodiments shown in FIGS. Since the directions of the two forces transmitted from the shaft 19 to both ends of the inner box 5 as the elevating body via the two belts 21 become the same, it is possible to prevent the generation of a moment that would twist the elevating body in a plane. The lifting operation can be stabilized. By stacking and winding both belts 21, the entire device can be made thinner.

Further, except for the outer box 3 as the fixed body and the inner box 5 as the elevating body, the other parts are integrally provided and unitized, so that the form of the fixed body or the elevating body changes. Mounting can be performed freely, and versatility is obtained.

Further, since the lifting and lowering can be controlled by using the limit switch 31, it is possible to provide a lifting and lowering device with less trouble in the control.

(Other Embodiments) In the above embodiment, the take-up shaft 19 is configured to wind one belt 21 from the central portion in a superposed manner. The belt may be locked at its leading end and wound up in an adjacent state.

That is, as shown in FIGS.
The take-up shaft 19 is attached to a cylindrical body 43 serving as a main body by a belt 21.
A lock slit 45 for inserting and locking the tip of the lock is formed. Two lock slits 45 are formed in the axial direction, and the positions in the circumferential direction are shifted from each other by 180 degrees, and the positions in the axial direction are adjacent to each other with a shift according to the width of the belt 21. In each lock slit 45, a wide portion 47 for holding the belt 21 and a narrow portion 49 for inserting the belt 21 are continuously formed. The end of the narrow portion 47 is continuous with the open edge 51 at the end of the cylindrical body 43.

The ends of the belt 21 inserted into the lock slits 45 are folded and sewn or fixed with an adhesive or the like to form a cylindrical portion 53. The lock rod 55 is inserted through the tubular portion 53 with the tip of the belt 21 inserted. The lock rod 55 has a length sufficient to continuously insert the two tubular portions 53 and is arranged substantially concentrically with the tubular body 43.

A thread-shaped guide 55 for guiding the belt 21 is provided on the outer periphery of the cylindrical body 43 in advance. In the guide 55, three flange portions 57 are formed in the cylindrical portion 56 for guiding the two belts 21 wound adjacently. Further, a guide slit 59 is formed in the tubular portion 56 and the flange portion 57 in communication with the lock slit 45 of the tubular body 43.

In the above embodiment, the belt 21 is attached to the inner box 5 which is an elevating body via the sliding member 23, but in other embodiments, a solid pulley is used instead of the sliding member 23. It is also possible to provide.

Further, in the above embodiment, the limit switch 31 is provided integrally with the slide rail 13, but in other embodiments, the limit switch 31 is provided separately from the slide rail 13. It is also possible.

That is, as shown in FIG. 8, of the two slide rails 13, in parallel along one on the left side in the figure,
A switch mounting member 29 is provided. A plurality of limit switches 31 are arranged on the switch mounting member 29 along the slide rail 13, and are located at positions where the limit switches 31 come into contact with the slider 15. The slider 15 is provided with a contact 30.

In the above embodiment, the moving pulley 25 is used. However, in another embodiment, a metal shaft or a shaft made of a material having a good sliding property with the belt 21 may be used. is there.

In the above embodiment, the control of the motor 16 is performed by using the limit switch 31. However, in other embodiments, the number of rotations of the motor 16 is stored. It is also possible to control the elevating position by controlling the number. In this case, storage means for storing the number of rotations and the ascending / descending position in correspondence with each other, a central processing unit for determining the number of rotations corresponding to the ascending / descending position based on a signal from the input means, and the like are required.

Although the lifting device according to the above embodiment has been described as being used for a hanging cabinet, other embodiments can be applied to various other fields exemplified below. . In other words, the clothesline can be raised and lowered, and when not in use, or with the laundry hanged, the clothesline that is raised to a high part of the ceiling, the lifting operation is performed only when taking in and out the dishes, otherwise Tableware drying device or tableware draining device, which is to be located at the raised position at the time of the store, for example, the product shelf of a store, for example, a pharmacy store, and is operated only when taking in and out of the product, otherwise it is located at the raised position. Product shelf equipment,
For example, it can be used for a food elevating device for raising and lowering dishes between the first floor and the second floor.

Further, in the above-described embodiments of FIGS. 8, 9 and 10, the lock slits 45 as lock portions provided on the take-up shaft 19 are axially adjacent to each other. Although it was wound up adjacently, in another embodiment, the lock portion is provided adjacent to the winding shaft 19 in the circumferential direction and overlapped in the axial direction,
Thereby, it is possible to wind both belts 21 in an overlapping manner.

Further, in the above embodiment, the inner box 5 as the elevating body performs the elevating operation under the outer box 3 as the fixed body. The lifting body M and the fixed body F
Is simplified as shown in FIG.
On the other hand, in another embodiment, as shown in FIG. 10B, the positional relationship between the elevating body M and the fixed body F is reversed, and the fixed body F of the above embodiment is replaced with the elevating body M. The lifting body M in the form can be a fixed body F. In this case, a complicated device such as a motor can be provided on the lower elevating body M side, and maintenance and inspection of the device when the fixed body F is mounted at a high position becomes easy.

Further, in the above embodiment, one left and right moving pulley 25 is provided, but a plurality of moving pulleys 25 may be provided as shown in FIGS. It is possible. In this case, a plurality of sliding members or fixed pulleys 23 corresponding to the moving pulley 25 are required. Thereby, the magnitude of the force applied to the belt 21 and the motor can be further reduced. Also in this case, a motor or the like can be provided on the lifting / lowering body M side (FIG. (D)).

Further, in the above embodiment, the fixed body F is located below the elevating body M, but in other embodiments, the elevating body M is located above the fixed body F. (E in the figure). In this case, one winding shaft 19 rotated by a motor is used.
The two belts 21 wound and unwound by
After being wound around a separate sliding member or fixed pulley P, the fixed portion 27 is guided by the moving pulley 25 of the elevating body M.
Fixed to. According to this embodiment, the fixed body F provided with a complicated mechanism such as a motor can be positioned below the lifting / lowering body M, and when the lifting / lowering body M is moved up and down at a high position, maintenance and inspection of the device is required. It will be easier.

[0050]

As described above, claims 1 and 2,
According to the invention of 3, 4, 5, 6, 7, or 8, by winding both belts used for lifting and lowering around one winding shaft,
Unlike the conventional case, two winding shafts are not required, and a pinion gear for transmitting the rotational force of the motor to the two winding shafts is not required, thereby eliminating the possibility of fatigue damage caused by the pinion gear. And the number of parts can be reduced.

According to the second, third, fourth, fifth, sixth, or seventh aspect of the present invention, the two belts are superposed and wound, and transmitted from the winding shaft to both ends of the elevating body via the two belts. 2
Since the directions of the three forces are the same, it is possible to prevent the generation of a moment that would twist the elevating body in a plane, and to stabilize the elevating operation.

According to the fourth, fifth, sixth, seventh or eighth aspect of the present invention, since the force is transmitted to the elevating body via the moving pulley, the prior art (the applicant has already filed the application) Compared to the prior art), the force applied to the belt is only half, and the strength of the belt and the motor can be reduced accordingly, and the cost of the apparatus can be reduced.

According to the fifth, sixth, seventh, or eighth aspect of the present invention, portions other than the fixed body and the elevating body are integrally provided and unitized, so that the form of the fixed body and the elevating body are changed. It is possible to freely attach it.

According to the invention of claim 6, 7, or 8,
Further, since the lifting and lowering can be controlled using the limit switch, it is possible to provide a lifting and lowering device with less trouble in the control.

[Brief description of the drawings]

FIG. 1 is a schematic overall perspective view of a lifting device according to an embodiment of the present invention.

FIG. 2 shows details of FIG. 1 (A) is a plan view (B)
Is a front view.

3A and 3B show details of FIG. 1, wherein FIG. 3A is a left side view and FIG. 3B is a right side view.

4A and 4B show the slider and the slide rail of FIG. 1, FIG. 2 or FIG. 3, wherein FIG. 4A is a view from the inside of the elevating device, and FIG. 4B is a right side view of FIG.

FIG. 5 shows details of the slide rail of FIG. 4;
(A) is an enlarged view of a lower end portion. (B) is an enlarged sectional view.

FIG. 6 is an enlarged perspective view of the sliding member of FIG. 1, FIG. 2, or FIG.

FIG. 7 is an enlarged perspective view showing a main part of the winding shaft of FIG. 1, FIG. 2, or FIG.

FIG. 8 is a schematic overall perspective view of a lifting device according to another embodiment of the present invention.

FIG. 9 is an enlarged perspective view showing the winding shaft of FIG. 8;

FIG. 10 is an exploded view of FIG. 9;

11 (A), (B), (C), (D), and (E) are overall schematic diagrams showing other embodiments.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Elevating device 3 Outer box as fixed body 5 Inner box as elevating body 7 Device base 9 Bolt and nut 13 Slide rail 15 Slider 15a Slide piece 15b Contact 16 Motor 17 Worm gear 19 Winding shaft 21 Belt 23 Sliding member 25 Dynamic pulley 27 Fixing part 28 Slide groove 28a Mounting groove 30 Contact 31 Limit switch 33 Control box 37 Mounting base 39 Bolt and nut 43 Cylindrical body 45 Lock slit 47 Wide part 49 Narrow part 51 Open edge 53 Cylindrical part 55 Lock rod 56 Cylindrical part 57 Flange part 59 Guide slit

Claims (8)

[Claims] A belt attached to both ends of a lifting / lowering body via a sliding member or a pulley, and a belt for winding both belts
A lifting device comprising: a winding shaft of a book; and a motor for rotating the winding shaft to raise and lower the elevating body. 2. The take-up shaft locks a central portion of one belt and rotates the belt so that the central portion of the belt is wound one after another, and both ends of the belt are attached to both ends of an elevating pair. The lifting device according to claim 1, wherein the lifting device is provided. 3. The winding shaft has two locking portions for locking the ends of the two belts adjacent to each other in the longitudinal direction of the shaft, whereby the two belts are wound adjacently. The elevating device according to claim 1, wherein: 4. The lifting / lowering body is located below the fixed body, and is provided at a substantially central portion of the fixed body; the one winding shaft rotated by the motor; A sliding member or a fixed pulley provided on the left and right sides of the fixed body for guiding the unwound belt to the left and right, and a dynamic pulley provided on the left and right sides of the elevating body for guiding the belt from the sliding member or the fixed pulley. And a fixing portion for returning and fixing the belt from the moving pulley to the fixed body.
The elevating device according to item 1. 5. An outer box having a bottom surface opened as said fixed body, and an inner box as an elevating body which moves up and down inside said outer box.
Slide rails fixedly provided on the inner left and right surfaces of the outer box, sliders guided by the slide rails and fixed on the left and right sides of the inner box, and the motor provided substantially at the center of the inner upper surface of the outer box. And the one winding shaft rotated by the motor, the belt wound and wound by the one winding shaft, and the belt provided on the left and right sides of the outer box for guiding both belts left and right. The sliding member or the fixed pulley provided, the belt from the sliding member or the fixed pulley, the moving pulley provided on the left and right of the inner box, and the fixing from the moving pulley to the outer box. And the slide rail, the motor, the one take-up shaft, the belt, the sliding member or the fixed pulley, and the fixed portion are integrated with one device base. Provided, lifting apparatus of claim 1, 2, 3 or 4, wherein the moving pulley provided on the belt is characterized in that is provided integrally with the slider. 6. A plurality of limit switches provided along said slide rail and in contact with said slider, input means for arbitrarily selecting a vertical position corresponding to the position of said limit switch, and input signals from said input means. The lifting device according to claim 5, further comprising: a control unit that controls a motor based on a signal when the slider contacts each of the limit switches. 7. The winding shaft according to claim 1, wherein a lock slit is formed in the cylindrical body for inserting a central portion of one belt. The elevating device according to item 1. 8. The winding shaft has two lock slits formed in a cylindrical body for inserting the ends of the two belts, and the ends of the two belts are folded back to form a cylindrical portion. 7. The lifting device according to claim 1, further comprising a lock rod for being inserted into the tubular portion in the inserted state.