JP5384850B2 - Moving shelf lifting device - Google Patents

Description

  The present invention relates to a lifting device for a movable shelf in which a shelf is supported by a parallel link mechanism so as to be lifted and lowered.

  Conventionally, in a storage facility located above a sink or a cooking table or the like, an elevating-type hanging cabinet that is used for the convenience of taking in and out things is known by allowing the shelves inside the cabinet to be raised and lowered (for example, , Patent Documents 1 to 3), such an elevating type hanging cabinet has a very complicated internal structure, such as a mechanism for opening and closing the door in synchronization with the raising and lowering of the shelf.

  In addition, since conventional lifting cabinets are usually installed in a unified manner with the system kitchen, if adding to an existing kitchen, the hanging cabinet currently in use should be removed. Construction was necessary.

  On the other hand, Patent Document 4 discloses a lifting shelf apparatus that does not include a door and simply lifts and lowers a shelf board. Since this lifting shelf device does not need to synchronize the raising and lowering of the shelf and the opening and closing of the door, the structure is simple and can be installed on the lower surface of an existing hanging door shelf. There is an advantage that it can be installed by construction of scale.

JP 2008-23107 A JP 2007-313227 A JP 2003-24152 A JP 2007-175333 A

  By the way, Patent Document 4 discloses both a case where the shelf plate has two upper and lower stages and a case where the shelf board has a single stage. However, in the case of the former two-stage type, the structure is complicated because the upper and lower shelf boards are supported in an interlocking manner by the upper arm and the lower arm. Moreover, since the upper and lower shelves overlap in the folded state, even small items cannot be placed on the shelves, and the work of removing all the items on the shelves when not in use occurs.

  On the other hand, in the case of the latter single-stage type, the shelf board draws a trajectory that moves backward as it descends. Is difficult to do. In addition, although patent document 4 is also disclosing the slide structure which pulls out a shelf board in a lowering position, not only the structure becomes complicated for the said slide, but a gravity center is displaced by pulling out a shelf board. Also affects stability.

  The present invention has been made in view of the above-described problems, and an object thereof is to disclose a movable shelf that is easier to use while rationally simplifying the configuration.

  In order to achieve the above-described object, the present invention provides a movable shelf elevating device installed on the bottom plate lower surface side of the hanging door shelf, and two movable front and rear front and rear pivotally supporting the lower ends of the movable shelf. A link arm and a damper that is pivotally supported at one end on the rear side of the upper end side of the two link arms and urges a piston rod to extend and contract toward the link arm from the other end. The upper end of each of the two link arms is pivotally supported by a rotation shaft to constitute a parallel link mechanism that can move the movable shelf up and down from the rear of the rotation shaft. A means is used in which a bent portion is formed in the vicinity of the rotating shaft, and a crank mechanism is provided that pivotally supports the piston rod of the damper on the bent portion to bias the link arm in the upward direction.

  The two front and rear link arms constituting the parallel link mechanism always rotate in conjunction with each other so that the movable shelf is moved up and down. Can be made. Therefore, in the present invention, the upper end side is extended from the rotating shaft of the rear arm, and the lowering stopper that can come into contact with a part of the bottom plate of the hanging shelf at the lowering position of the movable shelf is formed.

  The crank mechanism composed of the damper and the bent portion of one link arm has a function of mutually converting the expansion / contraction motion of the piston rod and the rotational motion of the link arm, and is usually attached to the piston rod. One crank arm is urged in the upward direction by the force. Therefore, when the movable shelf is lowered, a force that resists the urging force is required, and therefore the movable shelf can be slowly lowered. On the other hand, when the movable shelf is raised, the urging force can be assisted to raise the movable shelf with a light force.

  Here, as described above, the movable shelf can be lifted with a light force assisted by the urging force of the damper. However, if the movable shelf is lifted by leaving the momentum, the rear arm and the hanging shelf are lifted at the raised position. Contact with the bottom plate violently puts an inadvertent burden on each part and also causes abnormal noise.

Accordingly, in the present invention, a shock absorber is provided in front of the upper end side of the link arm, and this shock absorber is fixed in a state where the plunger protrudes toward the rear arm, and the plunger is moved back at the raised position of the movable shelf. Means that enable pressing by the peripheral surface of the pivot pivotally supporting the piston rod of the arm damper were used. According to this means, as the movable shelf rises, the damper pivot shaft of the rear arm that rotates about the pivot shaft comes into contact with the plunger of the shock absorber and compresses the plunger as the displacement of the damper pivot shaft increases. Let Therefore, the upward movement of the movable shelf is decelerated by the compression operation of the plunger near the top.

  The shock absorber is commonly referred to as a shock absorber, and when a stroke occurs in the plunger due to an external force, a known device is used, not limited to the oil type, as long as it generates resistance against it. can do.

  On the other hand, it is preferable to provide a handle bar for raising and lowering the movable shelf in order to provide convenience for the raising and lowering operation of the movable shelf. In particular, by providing the handle bar horizontally at the front end of the movable shelf, the vertical width of the entire apparatus can be suppressed, and the most compact aspect at the raised position can be achieved.

  The handle bar also functions as a hanger such as a towel or a ladle.

  If a side plate is erected on the left and right sides of the movable shelf, and the lower end of the link arm is pivotally supported on this side plate, the articles fall off from the side of the movable shelf while avoiding interference between the shelf surface of the movable shelf and the link arm. Can be prevented.

  Furthermore, the present invention includes a means for providing a cover that can accommodate the link arm and the movable shelf in the raised position, and pivotally supporting the rotation shaft of the link arm and the damper on the side plate of the cover and fixing the shock absorber. Use. According to this means, the damper and the shock absorber are not exposed, and all the members can be accommodated in the cover when not in use, and the appearance is clean.

  According to the present invention, the movable shelf can be moved up and down horizontally by the parallel link mechanism, and the speed of the lifting operation can be adjusted by forming a crank mechanism with a part of the link arm and the damper constituting the parallel link mechanism. Therefore, it was possible to make a movable shelf with high operability by a rational configuration. In addition, since the movable shelf can be lowered to the front and lower side, the articles can be easily put in and out and can be used more easily than when the movable shelf is lowered to the back as in the prior art.

  Further, in the present invention, the upper end side is extended from the rotating shaft of the rear arm, and the lowering stopper that can come into contact with a part of the bottom plate of the hanging shelf at the lowering position of the movable shelf is bent, so the number of members is increased. The parallel link mechanism can be reasonably controlled. Furthermore, since the pivot shaft, the pivot shaft of the damper, and the lowering stopper are concentrated on the upper end of the rear arm, the configuration is more rational.

  In addition, the lifting movement of the movable shelf is decelerated by a shock absorber near the top, so that the rear arm can avoid a violent collision with the bottom plate of the hanging rack and prevent the occurrence of breakage or abnormal noise. In addition, it is possible to avoid the danger that the hand is excessively pinched by the link arm when the movable shelf is finished.

  In addition, since the handle bar is provided horizontally at the front end of the movable shelf, the apparatus can be folded into the most compact state.

  Further, the damper and the shock absorber are covered by the cover, and the link arm and the movable shelf are also accommodated in the cover in a folded state when not in use, so that the appearance can be made modern with a clean appearance.

  Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. FIGS. 1 and 2 show a first embodiment of the present invention and show an installation example on the bottom surface of the bottom plate B of the hanging cabinet C. FIG. In the figure, 10 is a movable shelf, 20 is a link arm that forms a parallel link mechanism with the movable shelf 10, 30 is a damper that forms a part of the link arm 20 and a crank mechanism, and 40 is a cover. In the following description, left and right and front and rear are specified on the drawing as the user views the apparatus in the direction of the arrow.

  More specifically, the movable shelf 10 has a side plate 12 erected on the left and right sides of the shelf plate 11 and a handle bar 13 that protrudes horizontally from the front end of the shelf plate 11. The shelf board 11 is a table on which seasonings, cooking utensils, and other articles are placed, and the side board 12 is a guard plate that prevents the articles placed on the shelf board 11 from falling off from the side, and the link The lower end side of the arm 20 is pivotally supported. The handle bar 13 functions as a grip bar for moving the movable shelf 10 up and down, and also functions as a hanger for hanging articles such as towels and ladles.

Next, the link arm 20 includes two arms, a front arm 21 and a rear arm 22 that are suspended from the left and right sides of the movable shelf 10. The upper ends of the link arms 20 are attached to the side plate 41 of the cover 40 and the rotation shafts 23 and 24. It can be pivoted in the front-rear direction. Further, the lower end side is pivotally supported on the side plate 12 by pivots 25 and 26 so that the shelf plate 11 of the movable shelf 10 is horizontal. Here, the lower side link _{L 2} connecting the upper link _{L 1} and pivot 25, 26 connecting the pivot shaft 23, 24 of the front arm 21 and the rear arm 22, also a rotation shaft 23, 24 and the pivot 25, 26 The links L ₃ and L ₄ before and after linking (right and left in the drawing) have the same length and are parallel to each other to constitute a parallel link mechanism.

  In this embodiment, the pivot shafts 23 and 24 are pivotally supported near the front of the hanging rack C, and the pivots 25 and 26 are pivotally supported near the rear side of the side plate 12 of the movable shelf 10. The movable link 10 can be moved up and down from the rear raising position of the rotary shafts 23 and 24 to the lower lowering position by the parallel link mechanism of the configuration.

  Further, each of the front arm 21 and the rear arm 22 has the following characteristics. That is, the front arm 21 is bent halfway in order to avoid interference with the rear arm 22 when folded into an unused state. On the other hand, the rear arm 22 is formed with a bent portion 22a in the vicinity of the lower end side of the rotating shaft 24 on the upper end side thereof, and extends at the upper end side of the rotating shaft 24 so that the movable shelf 10 is in a use state. The lowering stopper 22b that can come into contact with the bottom plate B of the hanging cupboard C when in the lowering position shown is formed. Further, a stealing portion 22c is also provided on the lower end side of the rear arm 22 so as not to interfere with the front arm 21 when folded.

  Furthermore, connecting bars 22d are installed on the left and right rear arms 22 to prevent the articles placed on the movable shelf 10 from dropping off from the rear. Further, the connecting bar 22d has a function of more reliably interlocking the left and right link arms 20.

  Subsequently, the damper 30 is a gas damper attached to the rear of the rotating shaft 24 of the rear arm 22, and has a configuration in which the piston rod 32 is urged from one end of the cylinder 31 to extend and contract by gas pressure. The damper 30 pivotally supports the other end of the cylinder 31 on the side plate 41 of the cover 40 with a rotating shaft 33 and pivots the tip of the piston rod 32 on the upper end side bent portion 22 a of the rear arm 22 with a pivot 34. Do it.

  With this configuration, the damper 30 and the rear arm 22 are rotated from the upper end side bent portion 22a of the rear arm 22 by using the damper 30 as a piston (slider), the pivot 34 as a connecting shaft, the rotating shaft 24 of the rear arm 22 as a crankshaft. A crank mechanism having a crank up to the moving shaft 24 is configured. Then, the damper 30 causes the cylinder 31 to rotate following the rotation operation of the rear arm 22 and expands and contracts the piston rod 32 while the movable shelf 10 is moved up and down by the crank mechanism. In other words, during the raising / lowering operation of the movable shelf 10, the rotational movement of the rear arm 22 is converted into the expansion / contraction movement of the piston rod 32. Further, since the piston rod 32 of the damper 30 is urged by the gas pressure, the extension movement of the piston rod 32 by the urging force is the rotation movement of the rear arm 22 and, in turn, the link arm 20 including the front arm 21. It is converted into the whole rotational movement.

  Although the damper 30 employs a gas damper, other dampers such as a spring damper and a hydraulic damper can be employed as long as the piston rod is urged to extend and retract.

  Finally, the cover 40 includes left and right side plates 41 that pivotally support the upper end side of the link arm 20 respectively, a front plate 42 in front thereof, and a back plate 43 in the rear. The movable shelf 10 and the link arm 20 are sized and shaped so as to be covered. Here, the side plate 41 is bent in an L shape, and the side arm 41 supports the rotation shafts 23, 24, and 33 of the link arm 20 and the damper 30, and the top surface 41 b is attached to the bottom plate bottom surface of the hanging cabinet C. It is possible.

  Then, the lifting / lowering operation of the movable shelf according to the present embodiment will be described. When the movable shelf 10 is lifted / lowered with the handle bar 13 of the movable shelf 10, the movable shelf 10 is always kept horizontal by the parallel link mechanism described above. Go up and down. Further, since the lowering operation of the movable shelf 10 is performed against the urging force of the damper 30, the movable shelf 10 can be lowered slowly. On the other hand, since the raising operation of the movable shelf 10 is assisted by the biasing force of the damper 30, the movable shelf 10 can be raised with a light force.

  In this embodiment, the lowering stopper 22b of the rear arm 22 comes into contact with the bottom plate B of the suspension cabinet C, so that the lowering operation is stopped and maintained, while the rear arm 22 is in contact with the bottom plate B of the suspension cabinet C. The ascending motion is stopped and maintained by touching. Therefore, in order to prevent the generation and damage of the sound due to the contact, buffer members 44 and 45 such as rubber are provided on the bottom plate B of the hanging rack C at each of the ascending position and the descending position where the rear arm 22 abuts.

  By the way, in this embodiment, as mentioned above, the raising operation of the movable shelf 10 can be easily performed with a light force by the urging force of the damper 30, and the handle bar 13 is provided horizontally at the front end of the movable shelf 10. And compact storage. However, when the movable shelf 10 is lifted, there is a risk that the hand holding the handle bar 13 will be caught between the link arm 20 and the cover 40. Further, if the movable shelf 10 is lifted with the help of momentum, the rear arm 22 collides violently with the bottom plate B of the hanging cabinet C, which may cause abnormal noise and damage.

  Therefore, in order to avoid such an unexpected situation, the buffer device 50 is provided in the present embodiment. That is, in this embodiment, the shock absorber 50 is located on the upper end side of the link arm 20 and is fixed to the side plate 41 of the cover 40 so that the plunger 51 protrudes toward the rear arm 22. Specifically, the plunger 51 is provided so as to be pressed by the peripheral surface of the damper pivot 34 of the rear arm 22 immediately before the link arm 20 is completely folded.

  According to this configuration, during the raising operation of the movable shelf 10, the damper pivot 34 of the rear arm 22 starts to come into contact with the plunger 51 near the top, and the subsequent raising operation is performed by compressing the plunger 51. The raising operation of the movable shelf 10 can be decelerated near the top. Therefore, there is no danger that the hands will be caught in the cover 40 with excessive momentum, and the impact between the rear arm 22 and the bottom plate B of the hanging cabinet C will be mitigated at the raised position, and the occurrence of abnormal noise and the like will be prevented.

  In other words, immediately after the movable shelf 10 in the raised position is lowered, the damper pivot 34 of the rear arm 22 is urged in the opening direction (downward direction) by the elastic force of the plunger 51. Therefore, the movable shelf 10 can be smoothly lowered from the raised position.

  Further, at the ascending position of the movable shelf 10, the upward biasing force of the damper 30 and the downward elastic force of the buffer member 45 act against each other, and a swing back phenomenon (flapping) occurs in the rear arm 22. However, according to the shock absorber 50, the swing back phenomenon can be prevented or converged early by the expansion and contraction of the plunger 51.

The side view which showed the use condition (lowering position) of the raising / lowering apparatus which concerns on 1st embodiment of this invention. Front view showing the unused state (ascending position)

Explanation of symbols

C hanging cabinet 10 movable shelf 20 link arm 21 front arm 22 rear arm 30 damper 40 cover 50 shock absorber

Claims (4)

A lifting device for a movable shelf installed on the bottom side of the bottom plate of the hanging door shelf, including a movable shelf, two front and rear link arms pivotally supported on the left and right of the movable shelf, and the two link arms. One end is pivotally supported at the rear on the upper end side, and a damper is provided from the other end to urge the piston rod to extend and contract toward the link arm. The upper ends of the two link arms are rotated. A parallel link mechanism that supports the movable shelf up and down from the rear to the lower side of the rotation shaft by pivotally supporting it with a moving shaft, while the rear arm of the link arms has a bent portion near the rotation shaft. A crank mechanism capable of urging the link arm in the upward direction by pivotally supporting the piston rod of the damper at the bent portion, and the rear arm has an upper end extending from the rotating shaft. , Descending position of the movable shelf In the suspended cupboard bottom plate lifting device movable shelves characterized by comprising by 屈成 part and can abut downward stopper. A shock absorber is provided in front of the upper end side of the link arm. The shock absorber is fixed in a state where the plunger protrudes toward the rear arm, and the plunger is moved to the piston rod of the damper of the rear arm at the raised position of the movable shelf. The lifting device for a movable shelf according to claim 1, which can be pressed by a peripheral surface of a pivot that pivotally supports the shaft . The lifting device for a movable shelf according to claim 1 or 2, wherein a handle bar is horizontally provided at a front end of the movable shelf. The cover according to claim 1, 2 or 3, further comprising: a cover that can accommodate the link arm and the movable shelf in the raised position; and the pivot shaft of the link arm and the damper is pivotally supported on a side plate of the cover and the shock absorber is fixed. Lifting device for movable shelves.

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