JPS5811833Y2 - Link type lifting support device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION This invention relates to an improvement of a link-type elevating support device having a telescoping link mechanism to which intersecting portions are pivotally connected.

Conventionally, as a link type lifting support device, a lifting support table is supported by the upper part of each inclined link in a telescopic link mechanism arranged in an X shape and whose intersection portions are pivotally connected, and one of the vertical links in the telescopic link mechanism is The front end of the inclined link is pivotally connected to the lower frame, and the lower end of the other inclined link is moved forward by an elevating drive device such as a hydraulic cylinder device, thereby raising the elevating support platform via the telescopic link mechanism. The following type is generally known.

However, in this type of link type lifting support device,
When the elevating support base is at its lowest position, that is, the telescopic link mechanism is at its shortest position, the elevating drive device moves the lower end of the other inclined link forward to begin extending the telescopic link mechanism; Since the angle of inclination of each inclined link 1.degree. 2 with respect to the horizontal plane at the initial stage of extension is small, a significantly large driving force is required at the initial stage of extension, that is, at the beginning of pushing up the lifting support platform 4, and the capacity of the lifting drive device is limited to the initial stage of pushing up. The setting is based on the capacity required for the lift, which requires a lifting drive device with a considerably large capacity, which is uneconomical.

The object of this invention is to provide a link-type lifting support device that advantageously solves the above-mentioned problems.

Next, this invention will be explained in detail using illustrated examples.

The drawing shows an embodiment of this invention, in which 1
Two sets of telescopic link mechanisms 3 consisting of a pair of inclined links 1 and 2
are arranged parallel to each other at intervals in the left-right direction, and the lower front end of one inclined link (link tilted forward downward) 1 in each telescoping link mechanism 3 extends in the left-right direction with respect to the lower frame 5. An upper guide roller 12 pivotally connected by a horizontal shaft 6 and attached to the upper end of the inclined link 1
is fitted into a side-opening groove-shaped upper guide rail 13 fixed to the lower rear surface of the lifting support base 4 so as to extend in the front-rear direction.

Other slanted link (link slanted toward the rear) 2
The upper end portion is pivotally connected to the front portion of the lifting support base 4 by a horizontal shaft 14 extending in the left-right direction, and the lower guide roller 15 attached to the lower end portion of the inclined link 2 is connected to the rear upper surface of the lower frame 5. on both the left and right sides of the support shaft 11 which is fitted into a side-opening groove-shaped lower guide rail 16 which is fixed so as to extend in the front-rear direction, and which pivotally connects the intermediate portions of the respective inclined links 1 and 2. A support roller 7 is rotatably fitted therein.

Guide rollers 17 attached to both left and right sides of the front and rear parts of the pressing member 8 are fitted into side opening groove-shaped guide grooves 18 in the lower frame 5, and are gate-shaped guide grooves 18 fixed to the front part of the lower frame 5. An elevating drive device 20 consisting of an electric chain block is suspended from the upper part of the holding frame 19 of The chain 21 is sequentially wound around a sprocket 22 and a traction sprocket 23 attached to the front of the pressing member 8, and the tip of the chain 21 is connected to the lower frame 5 in front of the sprocket 23.

Lower rollers 25 are rotatably fitted on both left and right sides of a lower support shaft 24 installed at the lower end of each of the other inclined links 2, and a support row 27 is mounted on the suppressing member 8 at the lowest end position. , the initial push-up slope 9 slopes upward from the lower part toward the rear, and after the initial push-up, the lower row 225 engages with the lower row 225 to push the lower end of each inclined link 2 through the lower support shaft 24. A suppressing portion 10 for pressing forward is integrally provided, and a belt conveyor 26 is attached to the elevating support base 4 as an example.

As shown in FIG. 1, from a state where each telescopic link mechanism 3 is shortened to the maximum and the lifting support base 4 is at the lowest position, the lifting drive device 20 is operated in the upward direction to When the pressing member 8 is moved forward (first, the supporting roller 7 is moved by the initial push-up slope 9 provided on the pressing member 8).
The support shaft 11 is pressed upward through the telescopic link mechanism 3.
is extended to the extent that the telescopic link mechanism 3 is expanded and the inclination angle of each of the inclined links 1 and 2 is increased to the extent that the initial push-up slope 9 comes off the support roller 7 and the pressing part 1
0 engages with the lower row 225 and moves forward.
As a result, the rear end of each inclined link 2 is pushed forward via the lower row 225 and the lower support shaft 24, the telescopic link mechanism 3 is extended, and the elevating support base 4 is raised.

Further, when the lifting drive device 20 is operated in the downward direction, that is, in the chain payout direction, the lifting support base 4 and the belt conveyor 26 are gradually lowered by their own weight.

When implementing this invention, the sprocket 23 may be omitted and the chain 21 may be directly connected to the pressing member 8.
Further, a fluid pressure cylinder device may be used as the elevating drive device for moving the pressing member 8 forward.

In the embodiment described above, the support roller 7 is attached to the support shaft 11 that pivotally connects the intersection of the inclined link 1 and the inclined link 2, but the supporting roller 27 is attached to the intermediate part of the inclined link 1 or the inclined link 2. It may be attached.

Further, this invention can be implemented in a link-type elevating support device having a dove type telescopic link mechanism in which a plurality of X-shaped telescopic link mechanisms are arranged in the vertical direction and interconnected.

Further, in the above embodiment, the belt conveyor 26 is attached to the lifting support table 4, but any other mechanical equipment may be attached in place of the belt conveyor, or a mechanical apparatus is attached to the lifting support table 4. It may be used for appropriate purposes.

According to this invention, at the initial stage of extension of the telescopic link mechanism 3, that is, at the initial stage of pushing up the lifting support base 4, the support roller Since the middle part of the inclined link is pushed upward through the 4-force movement lever 7, the lifting support platform 4 can be initially pushed up with a relatively small forward movement force, and therefore a small-capacity lifting drive device 20 is used. It is possible to obtain economical effects.

[Brief explanation of the drawing]

The drawings show an embodiment of this invention, in which Fig. 1 is a side view showing the elevating support platform lowered to the lowest position, Fig. 2 is a partially cross-sectional plan view thereof, and Fig. 3 is the telescopic link mechanism 3 via the support roller 7 by the initial push-up slope 9.
It is a side view which shows the state which pushed up and expanded. In the figure, 1 and 2 are inclined links, 3 is a telescopic link mechanism, 4 is an elevating support base, 5 is a lower frame, 6 is a horizontal shaft, 7 is a support roller, 8 is a pressing member, 9 is an initial push-up slope, 10
is a pressing part, 11 is a support shaft, 12 is an upper guide roller, 13
is an upper guide rail, 14 is a horizontal axis, 15 is a lower guide roller, 16 is a lower guide rail, 17 is a guide roller,
Reference numeral 20 designates a lifting drive device, 21 a chain, 24 a lower support shaft, and 25 a lower roller.

Claims (1)

[Scope of utility model registration request] An elevating support platform 4 is supported by the upper part of a telescoping link mechanism 3 consisting of a pair of tilted links 1 and 2 arranged in an X-shape and pivotally connected at their intersections, and one tilted link in the telescoping link mechanism 3 The lower end of the other inclined link 2 is pivotally connected to the lower frame 5 by a horizontal shaft 6, and the lower end of the other inclined link 2 is supported by the lower frame 5 so as to be movable in the front and back direction. In the link-type lifting support device equipped with a lifting drive device for rotating the link 2, a support roller 7 is attached to the middle part of the inclined link, and the lower frame 5 is moved forward by the lifting drive device. A suppressing member 8 is attached so as to be movable in the front-rear direction, and the pressing member 8 has an initial push-up slope 9 that slopes upward from the front to the rear below the support roller 7 at the lowest end position. A link-type elevating support device characterized in that a pressing portion 10 is provided that presses the lower rear end of the other inclined link 2 toward the front after the initial push-up.