JPH04371662A - Abnormality detection device of motor-driven underfloor storage - Google Patents

Abstract

PURPOSE:To protect a device by a method wherein an end of a link member is supported so as to be movable by a predetermined stroke based on the movement of a storage case under conditions that displacement of a lid in the direction of its opening is restricted and a switch is provided which is turned ON when said member is displaced a predetermined stroke. CONSTITUTION:A driving part is actuated so as to move a storage case horizontally under conditions that an item M is placed on a lid L. Next, a horizontal link 63 of a link mechanism for opening the lid is pushed toward the direction of the opening of the lid L so that said pushing force is transmitted to a link member 3 through a connection link 67, following which one end 3t of the member 3 is displaced along a long hole 71 upwardly by a predetermined stroke G and positioned at a location Pc. Further the member 3 pushes a switch knob 5m of a detection switch 5 to switch over the switch 5 from OFF state to ON state so that the operation of the driving part is stopped.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an abnormality detection device for an electric underfloor storage cabinet that links the movement of a storage case with the opening and closing of a lid attached to an opening in the floor.

0002

[Prior Art] Conventionally, a lid that can be opened and closed is attached to an opening in the floor of a kitchen, etc., and a storage case is raised and lowered through the opening by a lifting drive unit installed below the opening, and the storage case is displaced as it is raised and lowered. Alternatively, an electric underfloor storage in which the lid is automatically opened and closed in conjunction with the operation of the lifting drive unit is disclosed in the underfloor storage box device disclosed in Japanese Utility Model Publication No. 57-36759, and the underfloor storage box device disclosed in Japanese Utility Model Publication No. 58-30906. The underfloor storage device disclosed in Japanese Utility Model Application Publication No. 64-7646, and the lid opening/closing mechanism for an underfloor storage lifting device disclosed in Japanese Patent Application Laid-open No. 57-19466 are known. ing.

[0003] All of these types of electric underfloor storages open and close the lid by using the lifting force for the storage case. For example, the lower surface of the lid, which is hinged to the floor, is directly pushed up by the upper end of the storage case. In addition, the lid was opened using a wire pulled by the lift drive unit.

0004

[Problem to be Solved by the Invention] By the way, in such an electric underfloor storage, if a person or something is placed on the lid of the electric underfloor storage, if an attempt is made to raise the storage case by mistake, Since the lid is forcibly stopped by an external force, it may cause deterioration and damage to the mechanical part of the lifting drive unit, burnout of the drive motor, etc., and if the driving force of the lifting drive unit is large, objects (people) may There was a problem that the opening operation could cause the door to be pushed down, causing damage to objects.

[0005] The present invention solves the above-mentioned problems existing in the conventional technology, and promptly detects abnormal conditions that impede the opening operation of the lid, and also detects objects placed on the drive unit or the lid. The purpose of the present invention is to provide an abnormality detection device for electric underfloor storage that can be protected.

[0006]

[Means for Solving the Problems] An abnormality detection device 1 according to the present invention includes a storage case in which a lid L that can be opened and closed is attached to an opening S of a floor F, and is moved below the opening S by a drive unit E. In the electric underfloor storage A where C is arranged, a link mechanism section 2 that opens and closes the lid L based on the movement of the storage case C is provided, and an arbitrary link member 3 constituting this link mechanism section 2 is provided.
The end portion 3t is supported so that it can be displaced by a predetermined stroke G by the movement of the storage case C while the displacement of the lid L in the opening direction is restricted, and the end portion 3t is moved to the normal position P.
It is characterized in that it is provided with a spring 4 that urges to maintain the position at the position Po, and a detection switch 5 that is turned on (or turned off) when the end portion 3t is displaced by a predetermined stroke G from the normal position Po. In this case, it is desirable to stop the operation of the drive unit E by turning the detection switch 5 ON (or OFF).

[0007]

[Operation] In the abnormality detection device 1 according to the present invention, the storage case C moves (horizontal movement or vertical movement) by the operation of the drive unit E.
Then, the movement is transmitted to the lid L via the link mechanism 2, and the lid L is opened and closed. At this time, link member 3
Since the end 3t of is biased by the spring 4 and held at the normal position Po, the detection switch 5 is turned off.
(or ON).

On the other hand, depending on the object placed on the lid L,
Even though the displacement of the lid L in the opening direction is restricted,
When the drive unit E operates, the movement of the storage case C causes
A pressing force is applied to the link mechanism part 2 in the opening direction of the lid L, but since the lid L is regulated, the end 3t of the link member 3 resists the elastic force of the spring 4 and moves in the normal direction. Position P
It is displaced by a predetermined stroke G from o. As a result, the detection switch 5 is pressed by the displaced link member 3,
Turn on (or turn off).

[0009] Therefore, if the detection switch 5 is turned ON (or OFF)
If the operation of the drive section E is stopped based on F), an excessive load on the drive section E is prevented, and the mechanical parts of the link mechanism section 2 and the like are protected.

0010

Embodiments Next, preferred embodiments of the present invention will be described in detail with reference to the drawings.

First, the configuration of an electric underfloor storage A including an abnormality detection device 1 according to the present invention will be explained with reference to FIGS. 1 to 6.

In FIG. 3, F is a floor of a kitchen or the like, and a rectangular opening S (see FIG. 5) is provided therein. on the other hand,
Reference numeral 11 denotes a main body frame, which has a rectangular parallelepiped-like framework as a whole made up of a plurality of frame members, and is inserted and installed under the floor from above the opening S. In addition, the main frame 1
A pair of front and rear lids L, Ls are attached to the top surface of the device 1. In this case, the outer edges of the lids L and Ls are hingedly connected to frame members located at the front and rear of the main body frame 11, so that the lids L and Ls are constructed in a double-opening type.

Furthermore, an elevating drive section 12 for elevating and lowering the storage case C or Cs is attached to the main body frame 11. The elevating drive unit 12 is guided by a pair of elevating drive mechanisms 13, 13 attached to the left and right side surfaces of the main body frame 11, and vertical guide rails 14 arranged inside the main body frame 11 and provided on the main body frame 11. and a lifting frame 1 connected to the operating parts of the lifting drive mechanisms 13, 13.
5, the front and rear ends of the elevating frame 15 and the main frame 11
The synchronizing mechanism 16, 16 is composed of a connected body of X-shaped links installed between the bottoms of the. In addition, the lifting drive mechanism 1
3 (the other one is the same) is connected to the main arm 1 via the rotation shaft 18.
9 and a sub-arm 20, and a drive unit 21 using a drive motor and a reduction gear mechanism. It can be configured by a mechanism (see Japanese Utility Model Publication No. 3-57240).

On the other hand, intermediate rail portions 31m each having an L-shaped cross section are provided at the upper portions of the left and right side surfaces of the main body frame 11, and the floor component Fc located before and after the intermediate rail portions 31m includes: The front rail part 31f... and the rear rail part 31r... which have an L-shaped cross section are attached. As a result, the rail portions 31f..., 31m..., 31r... are arranged continuously, forming a pair of left and right linear horizontal guide rails 31....

On the other hand, 32 is a case support part, which includes a pair of front and rear case support frames 33, 33 configured in a rectangular frame shape.
Consists of s. Each case support frame 33, 33s is movably loaded onto the horizontal guide rails 31 and connected to each other. On the other hand, each case support frame 33, 33s supports the storage case C, Cs, respectively. The flange provided at the top of storage case C (same for Cs side) is the case support frame 3.
It is caught and supported by the locking edge provided on the top surface of 3. Therefore, the storage case C is allowed to be displaced upward.

Further, one of the case support frames 33s is provided with a drive section E for horizontal movement shown in FIG. 6, and is configured to be self-propelled. 35, 35 are wire guides attached to the left and right frame members of the case support frame 33s, and the wire guides 35... have horizontal guide rails 31...
A fixing member 36 to be fixed to the side is slidably loaded. Furthermore, a support plate 37 is fixed to one end of the case support frame 33s, and a drive unit 38 is attached thereto. The drive unit 38 includes a drive motor 39 and a reduction gear mechanism 40. The reduction gear mechanism 40 consists of a worm gear 41 attached to the rotating shaft of the drive motor 39, a worm wheel 42 meshing with the worm gear 41, and a pinion 43 coaxially integrated with the worm wheel 42.
A pair of geared wires 44, 44 are engaged with each other at 0° opposing positions. One end of the geared wire 44 (the other one is the same) is a free end 44p, and the other end 44q is connected to the fixed member 36 through the wire guide 35.

In FIG. 3, reference numerals 51, 52, and 53 are position sensors (microswitches) provided at predetermined positions of one wire guide 35, which correspond to the position of the free end 44p of the geared wire 44, that is, the case support frame. Detect the position of 33s. In this case, the position sensor 53 detects a state in which the storage case C is located directly below the opening S;
The position sensor 52 detects the state in which the storage case Cs is located directly below the opening S, and the position sensor 52 detects the state in which the space between the storage cases C and Cs is located at the center of the opening S in the front-rear direction (standby position Ps).

On the other hand, at approximately the central position in the front-rear direction of the case support part 32, that is, at the left end (or right end) of the case support frame 33s located on the case support frame 33 side, there is a catch that protrudes laterally in the horizontal direction. A joining part 55 is provided. The engaging portion 55 is constructed by loading a rotatable roller onto an engaging pin.

Further, the lids L and Ls are closed at the standby position Ps where the engaging portion 55 is located at the center of the opening S in the front and back direction,
In addition, a pair of front and rear lid opening/closing link mechanisms 2, 2s are provided, which open the lids L, Ls by engaging the engaging portion 55 at a position other than the standby position Ps. As shown in FIG. 2, one link mechanism section 2 consists of an engagement link mechanism 6 and an amplifying link mechanism 7, and is attached to a side surface 11x of the main body frame 11 located below the lid L. The engagement link mechanism 6 has an upper end rotatably attached to a support plate 60 provided near the end of the side surface 11x of the main body frame 11, and then a vertical link 61 and an upper end near the middle of the side surface 11x. It consists of a front vertical link 62 which is rotatably attached to the front vertical link 62, and a horizontal link 63 which rotatably connects the lower ends of the vertical links 61 and 62, and the horizontal link 63 freely moves in parallel. On the other hand, the amplification link mechanism 7 has an upper link 6 whose upper end is rotatably attached to a bracket 64 attached to the lower surface of the lid L.
5, a lower link whose one end 3t is supported in the vicinity of the rear vertical link 61 on the support plate 60, and whose other end is rotatably connected to the lower end of the upper link 65, that is, the link member 3; It consists of a connecting link 67 that rotatably connects the intermediate portion of the member 3 and the intermediate portion of the horizontal link 63.

An abnormality detection device 1 according to the present invention is attached to the link member 3. First, as shown in FIG. 1, one end 3t of the link member 3 is supported by a long hole 71 provided in the support plate 60 and formed in an arcuate shape in the vertical direction so as to be rotatable and movable upward by a predetermined stroke G. . Although the elongated hole 71 in the embodiment is formed in an arcuate shape, it may also be formed in a V-shape. In the case of V-shape, link member 3
Even if the position of the other end is displaced, the one end 3t is allowed to be displaced within the elongated hole 71, so that it can be detected even if the displacement of the lid L is restricted during the opening operation.

Further, a spring 4 is installed between the one end 3t and the lower end of the support plate 60. This urges the one end portion 3t downward and holds it at the normal position Po. On the other hand, a detection switch 5 using a microswitch or the like is attached to the upper part of the support plate 60. The mounting position of the detection switch 5 is selected such that when the one end 3t is displaced upward by a predetermined stroke G, the switch knob 5n is pushed by the link member 3 and turned ON. Further, the tensile force of the spring 4 is set to be larger than the force acting on the spring 4 based on the own weight of the lid L, and smaller than the force acting on the spring 4 from the drive section E.

Note that the other link mechanism section 2s has the same configuration and is arranged symmetrically with respect to the link mechanism section 2. In the same mechanism 2s, 6s is an engagement link mechanism, 3s is a link member, 7s is an amplification link mechanism, 62s is a front vertical link, 63
s indicates a horizontal link. In this case, it is not necessary to attach an abnormality detection device to the link member 3s side.

Furthermore, gears 8 and 8s are formed at the upper end of the front vertical link 62 and the upper end of the front vertical link 62s on the side of the link mechanism section 2s, respectively, and mesh with each other.
A gap is provided between each vertical link 62 and 62s in which the engaging portion 55 is located. This gap becomes the standby position Ps.

Next, the operation of the electric underfloor storage A including the abnormality detection device 1 according to the present invention will be explained with reference to FIGS. 1, 4 and 5.
Explain with reference to.

First, when not in use, the case support portion 32
As shown in FIG. 4, the engaging portions 55 provided in
It is located in the gap between 2 and 62s. A position sensor 52 is used for position control in this case. As a result, the horizontal links 63, 63s are at their lower limit positions, the lids L, Ls are closed, and the pair of front and rear storage cases C, Cs are placed on standby at symmetrical positions with respect to the opening S.

On the other hand, when in use, for example, when it is desired to use the storage case C, by operating the drive section E for horizontal movement, the case support section 32 is moved along the horizontal guide rail 31 as shown in FIG. Move along... Thereby, the storage case C can be positioned directly below the opening S. In this case, the position sensor 53 is used for position control.
is used. At this time, the movement stroke of the case support part 32 is equal to half the width of the storage case C, and the case support part 32 moves quickly.

[0027] By moving the case support part 32,
Since the engaging portion 55 also moves horizontally to a position other than the standby position Ps, the engaging portion 55 pushes the front vertical link 62s of the link mechanism portion 2s and further raises the horizontal link 63s. At the same time, the rotational displacement of the front vertical link 62s is the gear 8s, 8
is transmitted to the other front vertical link 62 via the front vertical link 62 to raise the horizontal link 63. The upward displacement of the horizontal link 63 is transmitted to the link member 3 via the connecting link 67, raising the other end of the link member 3 and raising the upper link 65. As a result, the displacement of the horizontal link 63 is amplified by the amplification link mechanism 7, and the lid L is fully opened. On the other hand, the link mechanism part 2s side is also symmetrically linked, and the lid Ls
fully open. After the lids L and Ls are fully opened, the horizontal link 63s is held in the raised position by the engaging portion 55, and thus the lids L and Ls are also held in the open state.

Furthermore, when the storage case C is located directly below the opening S, the lifting drive unit 12 provided on the main body frame 11
is activated to raise the elevating frame 15. Therefore,
The storage case C located below the opening S can be raised to above the floor F through the opening S. In addition,
The same operation is performed when using the storage case Cs. On the other hand, in order to return the storage case C to the state when not in use, the elevating drive section 12 and the drive section E may be operated in the opposite direction. As a result, the engaging portion 55 is placed in the standby position Ps.
Stop at.

By the way, during use, if the lid L is operated by mistake despite the object M being placed on the lid L as shown in FIG. do.

First, the engaging portion 55 is displaced by the operation of the drive portion E, thereby the front vertical link 62 is displaced, and the horizontal link 63 is pushed in the opening direction of the lids L, Ls, and this pressing force is It is transmitted to the link member 3 via the connecting link 67. However, since the displacement of the lid L in the opening direction is restricted, the displacement of the upper link 65 is also restricted, and as a result, the one end 3t of the link member 3 is displaced upward along the elongated hole 71 by a predetermined stroke G. , the position Pc is indicated by a virtual line in FIG. As a result, the link member 3 pushes the switch knob 5n of the detection switch 5, and the detection switch 5 changes from the OFF state to the OFF state.
Switch to N state.

The detection result by the detection switch 5 is applied to the drive section E, and the operation of the drive section E is immediately stopped. Therefore, application of unnecessary stress to the link mechanism section 2 is prevented, and excessive load on the drive section E is also prevented, so that the link mechanism section 3 and the drive section E are protected. Furthermore, the object M is prevented from overturning. In addition, if necessary,
An alarm buzzer or the like may be sounded based on the detection result of the detection switch 5.

The embodiments have been described in detail above, but
The invention is not limited to such embodiments. For example, although the embodiment has shown the case where the lid is opened and closed based on the horizontal movement of the storage case, the present invention can be similarly applied to the case where the lid is opened and closed based on the vertical movement of the storage case. Further, the link member can be applied to any other link member in the link mechanism section. In addition, the detailed structure, shape, etc. may be arbitrarily changed without departing from the gist of the present invention.

[0033]

As described above, the abnormality detection device for an electric underfloor storage according to the present invention is provided with a link mechanism section that opens and closes the lid based on the movement of the storage case, and any link member constituting this link mechanism section is provided. a spring that supports the end of the housing so that it can be displaced by a predetermined stroke by movement of the storage case while restricting displacement in the opening direction of the lid, and that biases the end of the housing to hold the end in a normal position; turns ON (or O
Since it is equipped with a detection switch that causes the lid to open, it can quickly detect any abnormal conditions that prevent the lid from opening, thereby preventing the link mechanism and drive parts that make up the transmission mechanism, as well as objects placed on the lid. This has the remarkable effect of providing reliable protection.

[Brief explanation of drawings]

FIG. 1 is a side configuration diagram showing the main parts of an abnormality detection device according to the present invention;

[Fig. 2] A side view of the lid and link mechanism of the electric underfloor storage equipped with the abnormality detection device,

[Figure 3] Overall perspective view of electric underfloor storage,

[Fig. 4] A schematic configuration diagram when not in use, illustrating the operation of the electric underfloor storage.

[Fig. 5] A schematic configuration diagram during use to explain the operation of the electric underfloor storage,

[Fig. 6] Principle configuration diagram of the electric underfloor storage in plan view,

[Explanation of symbols]

1. Abnormality detection device 2 Link mechanism section 3 Link member 3t end 4 Spring 5 Detection switch A. Electric underfloor storage F Floor S Opening L Lid E Drive part C Storage case G Predetermined stroke Po Regular position

Claims (2)

[Claims] [Claim 1] A lid that can be opened and closed is attached to the opening in the floor,
In an electric underfloor storage in which a storage case that is moved by a drive unit is arranged below the opening, a link mechanism that opens and closes the lid based on the movement of the storage case is provided, and an arbitrary link mechanism that constitutes the link mechanism is provided. a spring that supports the end of the link member so that it can be displaced by a predetermined stroke by movement of the storage case in a state where displacement in the lid opening direction is restricted, and that biases the end to hold the end in a normal position; An abnormality detection device for an electric underfloor storage, comprising a detection switch that is turned ON (or OFF) when the end portion is displaced by the predetermined stroke from the normal position. 2. The abnormality detection device for an electric underfloor storage according to claim 1, wherein the operation of the drive unit is stopped by turning on (or turning off) a detection switch.