JP2012030022A - Elevating table - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a safe elevating table which has a neat designed pantographic elevating mechanism, has no vertical play or backlash when a top plate is lifted, prevents acceleration of the elevating speed, controls it at the top plate and prevents finger pinch.SOLUTION: Pantographs 16, 19 comprise three pieces and the middle pantograph 19 is a thick pipe. A movable side gas cylinder 30 is installed near an elevating frame 13, not installed with a base frame 15. A slide fitting 28, a movable part 25 of the pantographs, the fixed side gas cylinder and a gas cylinder driving fitting 14 of the elevating frame 13 are connected with pins each other, and the slide fitting 28 sticks and always keeps parallel to the top plate. The gaps between the crossing pantographs 16, 19 are made the dimension preventing finger pinch, and the gaps between the base frame 15, the elevating frame 13 and the respective pantographs 16, 19 are made safe dimension too.

Description

  The present invention relates to a structure of a pantograph type lifting mechanism for a lifting table.

  As a table top / bottom lift mechanism, there is one that lifts and lowers by supporting it with one column or two columnar columns (Patent Document 1), and another that lifts the table with a pantograph lift mechanism (Patent Document 1). 2). Since one top supports the top plate in a cantilevered manner, the end of the top plate tends to tilt due to insufficient strength. With two struts, it is necessary to synchronize the lifting of the left and right struts, and the mechanism is expensive. Many of the pantograph type lifting mechanisms have a lifting gas cylinder sandwiched between the base frame on the fixed side and the lifting frame, which has problems such as not being refreshed in appearance and being difficult to organize. Moreover, there was a danger of finger scissors, etc., because the crossing struts were narrow.

JP-A-11-253239

JP-A-2005-89052

  The table lift mechanism with a wide top plate adopts a pantograph type lift mechanism that can be lifted stably without tilting the top plate even in uneven load, but the pantograph type lift mechanism has a design that makes the appearance refreshing To do.

  There is a lift mechanism that is fixed to the top plate where the lift lever can be operated so that it can be controlled by hand without play and lifting when the top plate is lifted by the pantograph type lift mechanism, and the lifting speed is not accelerated. .

  The object is an elevating table equipped with a pantograph type elevating mechanism that is safe without finger scissors during elevating.

  The present invention includes a pantograph type lifting mechanism for a top plate that moves up and down, a base frame on the lower side of the pantograph type lifting mechanism, and a lifting frame on the upper side, and a drive source that drives the pantograph type lifting mechanism Is installed on the elevating frame side of the back of the top plate, the fixed side of the drive source is coupled to the driving source driving bracket provided on the elevating frame, and the elevating lever is located in the vicinity of the fixed side of the drive source. The movable side of the drive source is coupled to one end of a slide fitting that slides horizontally on the back of the top plate to be a movable side of the drive source, and the slide fitting is joined to the movable portion of the pantograph type lifting mechanism to attach the top plate Move up and down.

  Preferably, an end portion of the slide fitting is extended from a movable shaft of the pantograph type lifting mechanism in a fixed side direction of the drive source.

  More preferably, the pantograph type lifting mechanism is provided with a clearance of about 25 mm between the crossing struts and the base frame and the lifting frame, and the movable part is in close contact with the inner end of the lifting frame. Provide a stopper on the rail so that it stops without stopping.

  By attaching the lifting gas cylinder of the pantograph lifting mechanism according to the present invention to the lifting frame, the appearance of the mechanism can be refreshed. Further, since the table is moved up and down by adopting a pantograph type lifting mechanism, the support is not cantilevered even if the top plate has a wide size, and it is strong and stable against uneven loads. There is always close contact between the back of the top plate and the upper surface of the slider bracket, so there is no play and play when the top plate is lifted by hand. When the top plate moves up and down, it moves left and right while rubbing with the sliding material on the top surface of the slider bracket, so the lifting is not accelerated only by the movement of the gas cylinder, but it can be controlled by hand, so the precision equipment on the top plate Safe against.

Cart perspective view with lifting table Front and elevation view of cart with lift table Side view of cart with lifting table Perspective view of gas cylinder type lifting mechanism Front view of lift mechanism, lift view Top view of lifting mechanism Front BB cross section of lifting mechanism Detailed front sectional view of the lifting mechanism BB Perspective view of slide bracket Lifting pantograph strut assembly diagram without finger scissors Perspective view of lifting mechanism with drive spring as tension spring

  1 to 4 show an embodiment in which the present invention is suitable for a lift table, in which FIG. 1 is a perspective view of a cart with a lift table, FIG. 2 is a front view thereof, and a lift view, and FIG. 3 is a side view thereof. Indicates. The cart body with the lifting table is provided with four moving casters 7 on the main body base frame 6 and a vertical frame 4a at the bottom so that a plurality of battery trays 8 on which personal computer batteries are mounted can be installed. . The four struts 3 are provided with several horizontal rails 4 symmetrically in the vertical direction between the struts on both sides, and rails 5 are installed in left and right pairs inside the cart body with the lifting table, and each tray 9 is stored. However, the structure can be taken in and out. A space for installing a device having a pantograph type lifting mechanism 12 capable of moving up and down the top table 1 of a wide table is provided at the uppermost stage.

  At the top of the four columns, a handle pipe 2 is provided between the lifting table for easy operation of the lifting table. The handle pipe has a shape that protrudes outward from the top width to make it easier to handle and carry the handle. In addition, a wiring molding 10 can be installed on the two rear support columns so that the wiring can be stored. An elevating frame 13 of a pantograph type elevating mechanism is provided on the back of the top plate so that the gas cylinder elevating lever 11 can easily elevate and lower the top plate on the gas cylinder driving bracket 14 provided on the right outer side of the elevating frame. Is provided. The pantograph type lifting mechanism has a structure in which the base frame 15 is fixed to the uppermost stage of the column of the cart body with the lifting table on the fixed side.

  FIG. 4 shows details of a pantograph type lifting mechanism in which the drive source is a gas cylinder. FIG. 5 is a front view and an elevation view thereof, FIG. 6 is a plan view thereof, FIG. 7 is a front sectional view taken along line AA, FIG. 8 is a front sectional view taken along line BB, and FIG. Indicates. 4, the base frame 15 fixed to the main body has a hole 18 for attaching a fixed shaft 17 of a pantograph A16 and a lower guide rail 21 for guiding a lateral slide of a movable shaft 20 of a pantograph B19. It is provided on both sides of the direction. Similarly, the elevating frame 13 installed on the back of the top plate is provided with holes 24 for attaching the fixed shaft 23 of the pan tag lug B19 and upper guide rails 26 on which both sides of the movable shaft 25 of the pantograph A slide in the longitudinal direction. . Bearing rollers 36 are attached to both end portions of the pantograph movable shafts 20 and 25, respectively. The upper guide rail 26 on the lifting frame 13 side is provided with a movable shaft stopper 27 for raising and lowering initial height that determines the minimum height of the top plate. The movable shaft 25 of the pantograph A is joined from the upper side as shown in FIG. 9 to the slide metal fitting 28 that slides in the horizontal direction, and is in close contact with the back side of the top plate via a slide tape 29 such as a resin material and can be slid horizontally. It has become. The sliding tape made of this resin material makes the friction with the top plate smooth, and the stability of the top plate is maintained by appropriately controlling the acceleration of the gas cylinder. 7 and 8 are sectional views of the pantograph type lifting mechanism taken along the line BB. The end of the slide fitting 28 opposite to the pantograph movable shaft side is rotationally coupled 32 to the movable side 30 of the gas cylinder. Further, in order to keep the slide fitting 28 in a horizontal direction with the top plate 1 at all times, the slide fitting 28 has an extension portion 34 that extends from the movable shaft 25 of the pantograph A16 by about 40 mm in the direction of the gas cylinder fixing side 35. In addition, a resin sliding material 29 is bonded to the upper surface of the slide fitting 28 between the slide fitting and the back side of the top plate. A fixed side 35 of the gas cylinder is rotationally coupled 31 to a gas cylinder driving bracket 14 provided at an end of the elevating frame 13 for fixing the top plate.

FIG. 10 shows a support structure of a safe pantograph lift mechanism without finger scissors. The pantograph struts of the pantograph A16 and the pantograph B19 are divided into two blocks, the dimensions of the pantograph are maintained so that there is no finger scissors between the struts, and the base frame 15 and the lift frame 13 of FIG. The pantograph's struts and finger scissors are provided with sufficient dimensions so that there is no finger scissors between each strut and the initial angle of the pantograph in FIG. 5 is movable from about 20 degrees to the final angle of around 38 degrees. There is no. As shown in FIG. 6, the distance between the finger and the base frame 15 and between the finger and the lifting frame 13 is 25 mm or more, which is sufficiently safe.
In FIG. 5, the gas cylinder is set so that the initial position is extended by 25 mm or more so that the finger is not caught even in the contracted state. In FIG. 7, the initial position of the movable pipe of the pantograph is also 25 mm or more away from the ends of the base frame 15 and the lifting frame 13, so that the problem of finger scissors does not occur. The initial position of the slide fitting 28 is also provided so as not to pinch the gap with the lifting frame. In order to make the design refreshing in appearance as shown in FIG. 10, the pantograph supports are not four, but the center portion is formed by a thick pipe with a gap of three. Further, as shown in FIG. 4, the gas cylinder is installed on the slide metal fitting 28 on the back side of the top plate and the gas cylinder driving metal fitting 14 provided at the end of the lifting frame 13 so as not to touch the eyes.

FIG. 11 shows an embodiment in which a tension spring is used instead of a gas cylinder as a driving source of the present invention.
The stopper mechanism has a structure in which the stopper lever 40 engages the hole portion of the slide fitting 28 and the stopper hole 39 of the stopper lever receiver 38 to lock the slide fitting.

DESCRIPTION OF SYMBOLS 1 Top plate 2 Handle pipe 3 Support | pillar 4 Horizontal rail 4a Vertical frame 5 Rail 6 Main body base frame 7 Caster 8 Battery tray 9 Tray 10 Wiring mall 11 Lifting lever 12 Pantograph type lifting mechanism 13 Lifting frame 14 Gas cylinder drive bracket 15 Base Frame 16 Pantograph A
17 Pantograph A fixed shaft 18 Pantograph A fixed shaft mounting hole 19 Pantograph B
20 Pantograph B movable shaft 21 Lower guide rail 23 Pantograph B fixed shaft 24 Pantograph B fixed shaft mounting hole 25 Pantograph A movable shaft 26 Upper guide rail 27 Stopper 28 Slide bracket 29 Slide tape 30 Gas cylinder movable side 31 Gas cylinder fixed side coupling portion 32 Gas cylinder movable side coupling portion 33 Slide fitting joint portion 34 Slide fitting extension portion 35 Gas cylinder fixed side 36 Bearing roller 37 Tension spring 38 Stopper lever receiver 39 Stopper hole 40 Stopper lever

Claims (3)

  It has a pantograph type lifting mechanism for the top plate that moves up and down, a base frame on the lower side of the pantograph type lifting mechanism, a lifting frame on the upper side, and a drive source for driving the pantograph type lifting mechanism as the back of the top plate The fixed side of the drive source is coupled to the drive source drive fitting provided on the lift frame, and a lift lever is provided in the vicinity thereof on the fixed side of the drive source. The movable side of the source is connected to one end of a slide fitting that slides horizontally on the back of the top plate to be the movable side of the drive source, and the slide fitting is joined to the movable portion of the pantograph type lifting mechanism to raise and lower the top plate up and down table.   2. The lifting table according to claim 1, wherein an end portion of the slide fitting is extended from a movable shaft of the pantograph lifting mechanism in a fixed direction of the drive source.   The pantograph type lifting mechanism is provided with a clearance of about 25 mm between the struts crossing each other and the base frame and the lifting frame so that the movable part stops without contacting the inner end of the lifting frame. The lifting table according to claim 1, wherein a stopper is provided on the rail.

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