JPH119355A - Elevating/lowering cabinet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable executing an operation in a state where the elevating/ lowering state of an inner box in a dish dryer, etc., is bodily sensed. SOLUTION: The inner box 12 is provided inside an outer box 11. The inner box 12 is vertically movable with a guide mechanism 13 and the driving force is given by a driving device 14 including a motor 28, etc. A lever 16 is rotatably arranged in the base plate 12B area of the inner box 12 and the rotary position of the lever 16 is detected by an operation force detecting means. The operation force detecting means is given to a controller 18, a relay switch inside the controller 18 is properly changed-over so as to control the rotary direction of the motor 28 and a supply voltage is changed-over so as to control the rotary speed of the motor 28.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lifting cabinet and, more particularly, to changing a lifting speed of a case according to an operating force applied to an operating member when operating a case that moves vertically. It relates to a lifting cabinet capable of carrying out.

[0002]

2. Description of the Related Art There has been known an elevating cabinet in which a case can be raised and lowered in a vertical direction as seen in, for example, a dish dryer provided in a system kitchen. In this type of lifting cabinet, push buttons for instructing raising and lowering of the case are provided at fixed positions, and the case can be automatically raised and lowered by selectively pressing these push buttons. Also, in the elevating cabinet, after pressing the push button with the user's finger, the case moves up and down while the user is away from the elevating cabinet, so the safety at the time of elevating is guaranteed on the mechanism side. A variety of safety devices are also deployed.

[0003]

However, in the conventional elevating cabinet, after the operator presses the push button, the elevating operation of the case is left to the machine, so that when an unexpected trouble occurs in the safety device, Also, when the safety device does not function normally due to a failure or the like, the case cannot be stopped urgently, and there is an inconvenience that the case is separated from the operation feeling of the operator.

In addition, the installation of the safety device reduces the storage space for the case, increases the size and weight of the entire elevating cabinet, and deteriorates the workability when installing it on a ceiling or the like. There is also.

[0005]

SUMMARY OF THE INVENTION The present invention has been devised in view of such inconveniences, and its purpose is to provide a user with an operational sensation as if the user himself were raising and lowering the case. With it, you can wipe out expensive safety devices,
Another object of the present invention is to provide an elevating cabinet capable of reducing the weight while ensuring a sufficient storage area.

[0006]

In order to achieve the above object, the present invention provides a guide mechanism arranged vertically, a case capable of moving up and down along the guide mechanism, and moving the case vertically. In a lifting cabinet including a driving device including a motor, an operation member for instructing elevation of the case, and a control device for controlling driving of the driving device in accordance with an instruction from the operation member, the operation member includes the case And an operating force detecting means for detecting the operating force or position of the operating member, wherein the operating force detected by the operating force detecting means exceeds a predetermined value. The control device outputs a drive command signal to the motor. According to such a configuration, the user continues to apply a predetermined operating force to the operation member arranged in the case, so that the case is moved up and down. As the user moves up and down, the user can feel as if he / she is raising and lowering the case. In addition, even if a trouble occurs during the raising and lowering of the case, the trouble can be detected by the user's sense, so that various conventional safety devices are not required, and the case of the conventional lifting cabinet is not required. It is possible to achieve a reduction in the weight of the elevating cabinet while ensuring a sufficient storage space, and consequently it is possible to effectively improve the workability when the cabinet is installed on a ceiling or the like.

[0007] The present invention also provides a guide mechanism disposed vertically, a case capable of moving up and down along the guide mechanism, a drive device including a motor for moving the case up and down, and a lifting and lowering mechanism for the case. An operation member for instructing the operation member, and a lifting / lowering cabinet including a control device that controls the driving of the driving device in accordance with the instruction of the operation member, wherein the operation member is movably provided at a predetermined position of the case, and Operating force detecting means for detecting an operating force or a position of the operating member is provided, and the control device outputs a drive command signal for changing a rotation speed of the motor according to the operating force detected by the operating force detecting means. The above-mentioned object can be achieved.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The operating member according to the present invention is constituted by a lever disposed in a bottom plate region of the case, and the operating force detecting means includes a member fixed to the lever, It is preferable to adopt a configuration in which it is constituted by a plurality of pairs of optical transmission / reception units whose positions can be detected stepwise. According to this structure, the operating force of the lever corresponding to the vertical movement position of the one member can be specified.

[0009] Further, a configuration is also adopted in which the operating member is constituted by a lever arranged in the bottom plate region of the case, and the operating force detecting means is constituted by a strain gauge which can contact the lever. can do. When such a configuration is adopted, the case can be lifted and lowered under the condition that the value detected by the strain gauge exceeds a predetermined value, so that a simple lifting cabinet can be obtained.

[0010]

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

FIG. 1 shows an embodiment in which a lifting cabinet according to the present invention is applied to a dish dryer. In this figure, an elevating cabinet 10 includes an outer box 11 fixed to a ceiling or an upper part of a wall surface, an inner box 12 constituting a case arranged inside the outer box 11, and an outer box 11 and an inner box 12. A guide mechanism 13 disposed therebetween, a driving device 14 for vertically moving the inner box 12,
A lever 16 as an operating member disposed on the bottom side of the inner box 12, an operating force detecting means 17 for detecting an operating force or a positional change of the lever 16 (see FIG. 4), and an operating force detecting means 17 And a control device 18 that is electrically connected to the drive device 14 and outputs a predetermined signal to the drive device 14.

The outer box 11 includes a top plate 11A and a pair of side plates 11B, 11 suspended at both left and right ends of the top plate 11A.
B, a back plate 11C disposed at the rear end of the top plate 11A and the side plate 11B, and a front plate 11D disposed at the front end, and are formed in a bottom open type. Here, the front plate 1
1D is cut out in a U-shape whose lower side is an open side, and a door 19 is arranged so as to fill this U-shaped space. In the present embodiment, the door 19 is made of a resin plate having a light-transmitting property, so that the internal state is visible from the outside. The door 19 is connected via hinges 20 arranged at two upper positions of the front plate 11D, and can be rotated in the front-rear direction by gripping a handle 21 fixed to a lower central portion. Access to is possible.

The inner box 12 is provided in such a shape that the front side is open. That is, the inner box 12 is
2A and a bottom plate 12B, and a pair of inner side plates 12C disposed on both left and right ends of the inner top plate 12A and the bottom plate 12B.
12C and an inner rear plate 12D arranged at the rear end. The partition plate 22 is bridged between the inner side plates 12C and 12C at a position slightly higher than the bottom plate 12B to form a constant space C between the inner side plates 12C and the bottom plate 12B. At the same time, the operation force detecting means 17 can be arranged.

As shown in FIGS. 2 and 3, the guide mechanism 13 includes a guide rail 24 extending vertically in the center of the outer box 11 relative to the side plate 11B and an inner side plate of the inner box 12. The guide rails 24 are provided at upper positions on outer surfaces of the guide rails 12C and 12C, and are constituted by an outwardly concave member 25 provided so as to be relatively movable.

The driving device 14 is disposed via a downward culvert-type support member 27 disposed on the lower surface of the top plate 11A. As shown in FIGS. 2 and 3, the driving device 14 includes a DC motor 28 with a speed reducer fixed to the support member 27, a driving gear 29 fixed to an output shaft of the motor 28, The driven gears 30 and 31 which are rotatable in opposite directions by engaging with the main driving gear 29, and the take-up / pull-out pulley 3 fixed to the rotation shaft of each driven gear 30 and 31.
3, 34, a belt 36, 37 having one end fixed to each of the winding and pulling pulleys 33, 34, and guide pulleys 38, 39 arranged at a predetermined distance from the winding and pulling pulleys 33, 34. It is provided with. The other ends of the belts 36 and 37 are fixed to the left and right ends of the inner top plate 12A of the inner box 12 via the bracket 40.

As shown in FIG. 4, the lever 16 is disposed in a notch 42 formed in the bottom plate 12B of the inner box 12. The lever 16 includes an operation shaft 16A extending substantially horizontally at the near side position, and an operation shaft 16A.
Hinge connection shaft portions 16B, 16 connected to both ends of
B, and a support shaft portion 16C extending between the depth-side ends of the hinge connection shaft portions 16B, and are provided in an appearance having a substantially square closed loop as a whole. The hinge connection shaft portions 16B, 16B are rotatably provided via a pivot pin 43 constituting a rotation fulcrum. The lever 16 is always provided at a predetermined neutral position so as to be stationary at a predetermined neutral position by a coil spring 44 stretched over the hinge connection shaft portion 16B and the bottom plate 12B.

As shown in FIG. 4, the operating force detecting means 17 has a one-piece member 47 formed substantially at the center of the support shaft 16C of the lever 16, and is disposed at a vertical position sandwiching the one-piece member 47. And a plurality of sets of optical transmission / reception units 48A to 48D. The one-piece member 47 includes a base piece 47A and a convex piece 47 connected thereto so that the planar shape becomes a convex shape.
B and the base piece 47A.
Are formed with an upper slit 50 and a lower slit 51 which are symmetrical with respect to the neutral position. Here, the interconnection between the one member 47 and the support shaft portion 16C is performed as follows. That is, the front side edge of the base piece 47A is cut out so that the support shaft 16C can be inserted therethrough.
3 is inserted and a bolt (not shown) is screwed.

Each of the light transmitting / receiving sections 48A to 48D is composed of a combination of a light emitting element and a light receiving element, and has an inner U-shaped member 55 and an outer Each is attached to the U-shaped member 56. The U-shaped members 55 and 56 are symmetrically arranged at upper and lower positions using these as one unit, and are provided on the inner U-shaped member 55 and the outer U-shaped member 56 located at the upper side in FIG. Optical transceiver 48
A and 48B detect when the one member 47 moves upward, that is, when a downward operation force is applied to the operation shaft portion 16A of the lever 16, while the U-shape located at the lower side in FIG. Optical transmitting and receiving unit 48 provided on the member 55, 56
C and 48D detect when the one member 47 moves downward, that is, when an upward operation force is applied to the operation shaft 16A. Here, the inner U-shaped member 55 is combined so as to be located slightly in the depth direction than the outer U-shaped member 56, and the light transmitting / receiving units 48B and 48C held by the inner U-shaped member 55 The convex piece 47 of the one-piece member 47
The optical transmission / reception path can be appropriately blocked by B.
Further, the light transmitting / receiving unit 48 held by the outer U-shaped member 56
A and 48D are the surface of the base piece 47A of the piece member 47,
The slits 50 and 51 can block or open the optical transmission / reception path.

The output of the operating force detecting means 17 is given to the control device 18. This control device is configured to include a control board, and the control board is configured to include a relay circuit illustrated in FIG. Specifically, the relay switches R1 and R4 connected to the low-voltage power supply L, and the relay switches R2 and R2 connected to the medium-voltage (intermediate voltage) power supply M
R5 and a relay switch R connected to the high voltage power supply H
3, R6. Here, the relay switches R1 to R3
Is a switch for rotating the motor 28 in a direction in which the belts 36 and 37 are wound.
R6 is a switch that rotates the motor 28 in the direction in which the belts 36 and 37 are extended. Relay switch R1, R
When the switch No. 4 is turned on, the motor 28 rotates at a low speed, and when the switches of the relay switches R2 and R5 are turned on, the motor 28 rotates at the intermediate speed. When the relay switches R3 and R6 are turned on, the motor 28 rotates at a high speed.

More specifically, at the neutral position of the one-piece member 47 shown in FIG.
48D is in a state where all the light from the light emitting element is received by the light receiving element. Therefore, as shown in FIG. 7, both the “up” side and the “down” side are kept ON, and the relay switch R1 ~ R6 are all kept OFF, inner box 1
2 is kept stopped. Here, as shown in FIG. 6 (B), when the one member 47 moves downward, that is, when the operating shaft 16A of the lever 16 is gripped and pushed upward, the lower side is formed by the base piece 47A of the one member 47. The light of the optical transmission / reception unit 48D of the outer U-shaped member 56 is turned off (see the position (B) in FIG. 7B). At this time, the relay switch R1 shown in FIG. 5 is turned on, a current flows through the motor 28, and the motor rotates so as to wind up the belts 36 and 37 at a low speed. Further, when the one member 47 descends and reaches the position shown in FIG. 6C, the light of the light transmitting / receiving section 48D in the outer U-shaped member 56 passes through the slit 51 and is turned on.
On the other hand, the light of the light transmitting / receiving section 48C of the inside U-shaped member 55 is blocked by the convex piece 47B and turned off (FIG. 7).
(See (B) middle (C) position). This means that a stronger operating force is applied than in the stage of FIG. 6B, and at this time, the relay switch R2 is turned on, and the intermediate voltage M
Is applied to rotate the motor 28 at the intermediate speed. The one member 47 further descends, and each optical transmitting / receiving unit 48
When the light at C and 48D is shut off and both are turned off (see the position (D) in FIG. 7B), the relay switch R3 is turned on assuming that the strongest operating force has been applied, and the motor 28 rotates at the fastest speed.

When the one-piece member 47 moves upward in the opposite direction to the above operation direction, the ON-OFF state shown in FIG.
, The relay switches R4 to R6 are selectively switched, whereby the speed of the motor 28 is controlled in the direction opposite to the above.

Reference numeral 60 in FIG. 3 denotes a dog provided on the inner box, and reference numerals 61 and 62 denote sensors which contact and separate from the dog and act as stoppers for regulating the elevation area of the inner box 12. Is shown.

Therefore, according to this embodiment, the rotation speed of the motor 28 can be controlled through the switching of the relay switch according to the operating force when the lever 16 as the operating member is rotated, and the operator can control the internal speed. The user can operate the box 12 while feeling the lifting state. Therefore, even if any abnormality occurs while the inner box 12 is being moved up and down, the abnormality can be sensed, and the effect that the up / down operation can be stopped immediately without using a special safety device or the like is obtained.

Note that the present invention is not limited to the above embodiment, and for example, a configuration shown in FIG. 8 can be adopted. In this example, strain gauges 71 and 72 are provided on the inner surface of each arm of one U-shaped member 70 that stands up.
The motor control is performed by detecting that the support shaft 16C selectively contacts the strain gauges 71 and 72. Here, the relay switches R1 and R2 shown in FIG. 9 and the transistors TR1 and TR
2, the inner box 12 rises at a constant speed when the relay switch R1 is turned on, while the inner box 12 moves down at a constant speed when the relay switch R2 is turned on. . In the present embodiment, the transistors TR1 and TR2 are set to be turned on on condition that the strain amount of the strain gauges 71 and 72 is equal to or more than a predetermined value. However, the voltage is varied according to the strain amount. If controllable, the rotation speed of the motor 28 can be adjusted as in the above embodiment.

According to such a configuration, in addition to the effect obtained in the above embodiment, an additional effect that the operation force detecting means 17 can be simply configured can be added.

The lifting cabinet according to the present invention can be applied not only to a tableware dryer but also to a general storage cabinet. Further, the mechanical or electrical configuration according to the present invention can be variously changed in design as well as in the illustrated configuration as long as the same operation is achieved. For example, the slit 5 into the one-piece member 47
0 and 51 can be formed at a finer pitch, and the operating force can be specified by integrating the numbers of light blocking on the plus side and the minus side by the light transmitting and receiving unit. Further, a rack and pinion or the like may be employed for the guide mechanism 13 of the inner box 12, and the guide mechanism 13 may be moved up and down using a single belt.

The operating member according to the present invention is not limited to the lever having the illustrated configuration. For example, a configuration in which a shaft or a rod-shaped operation rod supported by the bottom plate 12B or the like is provided, and this can be moved forward and backward in the axial direction to perform a predetermined switch operation can be exemplified.

[0028]

As described above, according to the present invention,
The operating member is provided movably at a predetermined position of the case, and operating force detecting means for detecting the operating force or the position of the operating member is provided, and the operating force detected by the operating force detecting means exceeds a predetermined value. Sometimes, since the control device is configured to output a drive command signal to the motor, the user continues to apply a predetermined operating force to the operating member arranged in the case, so that the case is raised and lowered. The hand of the user also moves up and down as the case moves up and down, so that the user can be given an operational feeling as if he / she is raising and lowering the case. This also gives
Even if a problem occurs during the raising and lowering of the case, the trouble can be detected by the user's sense, so various conventional safety devices are not required, and the storage space of the case is sufficient compared to the conventional lifting cabinet. Thus, it is possible to achieve a reduction in the weight of the elevating cabinet while ensuring the workability when installed on a ceiling or the like.

The present invention also employs a configuration in which the control device outputs a drive command signal for changing the rotation speed of the motor in accordance with the operation force detected by the operation force detection means. Thus, the speed of movement of the case can be controlled, and the usability can be further improved.

[Brief description of the drawings]

FIG. 1 is an external configuration diagram showing an embodiment in which a lifting cabinet according to the present invention is applied to a dish dryer.

FIG. 2 is a partial schematic cross-sectional view of the cabinet.

FIG. 3 is a schematic sectional view taken along line AA of FIG. 2;

FIG. 4 is a schematic perspective view showing a configuration of a lever and an operation force detection unit.

FIG. 5 is a diagram showing a relay circuit configuration of the control device.

FIG. 6 is an operation explanatory view showing a positional change of the one member by the operation force detecting means.

FIG. 7 is a diagram showing an ON-OFF state of an optical transmitting / receiving unit.

FIG. 8 is a schematic perspective view similar to FIG. 4, showing a modification of the embodiment.

FIG. 9 is a configuration diagram of a relay circuit employed in the configuration of FIG. 8;

[Explanation of symbols]

10 ... elevating cabinet, 12 ... inner box as case, 13 ... guide mechanism, 14 ... drive device,
16 ... Lever as an operating member, 17 ... Operating force detecting means, 18 ... Control device, 47 ... Single member, 7
1 ... Strain gauge

Claims (4)

[Claims] 1. A vertically movable guide mechanism, a case that can move up and down along the guide mechanism, a drive device that includes a motor that moves the case up and down, and an operation that instructs the case to move up and down In a lifting cabinet including a member and a control device that controls the driving of the driving device in accordance with an instruction from the operation member, the operation member is movably provided at a predetermined position of the case, and the operation of the operation member is performed. Operating force detecting means capable of detecting a force or a position, wherein when the operating force detected by the operating force detecting means exceeds a predetermined value, the control device outputs a drive command signal to the motor. Up and down cabinet. 2. A vertically movable guide mechanism, a case that can move up and down along the guide mechanism, a drive device that includes a motor that moves the case up and down, and an operation that instructs the case to move up and down In a lifting cabinet including a member and a control device that controls the driving of the driving device in accordance with an instruction from the operation member, the operation member is movably provided at a predetermined position of the case, and the operation of the operation member is performed. Operating force detecting means capable of detecting a force or a position, wherein the control device outputs a drive command signal for changing a rotation speed of the motor in accordance with the operating force detected by the operating force detecting means. And elevating cabinet. 3. The operating member includes a lever disposed in a bottom plate region of the case, and the operating force detecting unit determines a one member fixed to the lever and a position of the one member in a stepwise manner. The lifting cabinet according to claim 1, comprising a plurality of pairs of optical transmission / reception units that can be detected. 4. The method according to claim 1, wherein the operating member is configured by a lever disposed in a bottom plate region of the case, and the operating force detecting unit is configured to include a strain gauge that can contact the lever. The lifting cabinet according to claim 1 or 2, wherein