JPH0724214Y2 - Lifting table - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a lifting table used for a workbench on which tools, materials, etc. are placed, or an exhibition stand on which various products and exhibits are placed, during various operations.

[Conventional technology]

Conventional worktables and display stands generally have fixed tables on legs of a certain height.

In addition, there are those in which the height of the table can be adjusted and those in which the table is tilted.

[Problems to be solved by the device]

Among the above-mentioned conventional tables, if the height cannot be adjusted, it is used as a workbench, and when the height of the working part and the table are different, the distance on the table to take the tool to the working part Long and inefficient.

Further, although it is convenient to be able to adjust the height and tilt angle of the table, there are problems such as a complicated mechanism for adjusting the height of the table, a complicated mechanism for tilting the table and a locking means, which is troublesome. is there.

An object of the present invention is to solve the problems of the conventional table as described above, and to provide a lifting table in which the height and inclination angle of the table can be easily adjusted.

[Means for Solving the Problems]

In order to solve the above-mentioned problems, this invention fits a hollow lifting column into a fixed column consisting of a square tube fixed on a base, and fits a free-lock cylinder into this lifting column,
A plurality of holes are provided in a multi-tiered manner so as to face the opposite side walls of the fixed column, respectively, and the holes provided so as to face the opposite side walls of a rectangular tube vertically movable in the fixed column and the fixed column Fix the above-mentioned square tube at any position in the fixed column with the fixing bolts and wing nuts inserted in the holes provided at any step,
The lower end of the free lock cylinder is connected to the upper end of the square tube through a connecting frame, and the receiving frame of the upper end of the piston rod protruding from the upper end of the free lock cylinder is connected to the upper end of the elevating column, and is fitted into the piston rod. The push rod has an upper end protruding into the receiving frame, and an operating lever for contacting the upper end of the push rod to push down or push the push rod is swingably attached to the upper end of the lifting column. Is attached to the lower part of the table so that a swing frame of rectangular rectangular tube shape with an open lower end is swingably attached by a horizontal shaft, and the upper and lower adjustment bolts screwed into the upper and lower screw holes of one side wall of the swing frame. The pushing pieces attached to the inner ends of the lifting columns are arranged so as to be crimped to the side surfaces of the lifting columns. Providing a lifting table provided with a stopper that strikes the surface.

[Action]

Since the present invention has the above-mentioned structure, when the operation lever is set to the lock release side, the lock of the free lock cylinder is released, so that the height of the table can be adjusted very easily.

When the table reaches an arbitrary height in this way, the table is fixed at that height when the operation lever is moved to the lock position.

Also, loosen the upper and lower adjustment bolts at the bottom of the table,
The table can be tilted and fixed at an arbitrary angle by tightening.

〔Example〕

In the embodiment shown in the drawings, reference numeral 1 is a base, and in the illustrated example, two metal square tubes bent in an arc shape are combined, and a height-adjustable leg 2 is provided at each end to form a four-legged structure. But,
In some cases, casters may be attached to make it movable.

A fixed support column 3 made of a square tube is fixed to the upper center of the base 1, and a lifting column 4 made of a square tube having a slightly smaller diameter is provided in the support column 3.
Can be moved up and down freely.

Reference numeral 5 denotes a swing frame that covers the upper end outside of the elevating column 4, and has a rectangular cross section with a rectangular cross section, and has a lower end opened.
A detachable horizontal shaft 6 composed of bolts and nuts is swingably attached to the elevating column 4, and a table 7 is fixed to the upper end of the swing frame 5.

Further, a pair of upper and lower table tilt angle adjusting bolts 8 and 9 are screwed into the upper and lower screw holes provided on one side of the swing frame 5,
A push piece swingably attached to the inner end of each of the bolts 8 and 9.
By pressing 10 and 11 against the outer surface of the lifting column 4,
The table can be adjusted to any tilt angle.

A stopper 12 for horizontally holding the table 7 is provided inside the other side of the swing frame 5 as shown in FIGS.
To fix.

Reference numeral 15 is a free lock cylinder fitted in the elevating column 4, and a U-shaped receiving frame 17 is fixed to the upper end of a piston rod 16 thereof, and the horizontal shaft 16 is passed through the receiving frame 17.

The piston rod 16 is hollow, and a push rod 18 is slidably fitted therein.

FIG. 6 shows the details of the above-mentioned free lock cylinder 15. The free piston 20 and the piston 21 integral with the piston rod 16 are slidably fitted in the cylinder 15, and the piston 21
Spool valve 22 operated by the push rod 18 at the center of
Is provided with the valve chamber 23, and the valve chamber 23 is communicated with the upper chamber 25 in the cylinder 15 through the orifice hole 24.

Then, the upper chamber 25 and the lower chamber 26 are filled with oil, and the gas chamber 27 below the free piston 20 is filled with gas of a predetermined pressure.

As shown in FIGS. 1 and 2, a downwardly U-shaped connecting frame 28 is attached to the lower end of the cylinder 15 and the upper end of the square tube 29 is connected to the connecting frame 28.
Hole 33 on the upper end of the square tube 29 and hole 3 on the connecting frame 28
A pin 30 is inserted into 3'and connected to each other, and a plurality of holes 31 are provided on the opposite side walls near the lower part of the fixed support column 3 so as to face each other in multiple stages.
A fixing bolt 32 removably inserted into any of the above is inserted into a hole 33 provided opposite to the opposite side wall at the lower end of the square tube 29 and fixed with a wing nut 34.

Reference numeral 35 in FIGS. 1 to 4 denotes a push rod operating lever which is swingably attached to the receiving frame 17 by a shaft 36.
And it goes out from the notches 37 and 38 provided in the lifting column 4.

Next, the operation of the above embodiment will be described. FIG. 2 shows a state in which the table 7 is fixed horizontally.

At this time, the stopper 12 of the swing frame 5 hits the elevating column 4,
Pressing pieces 10, 11 at the inner ends of the upper and lower bolts 8, 9 come into contact with the outer side of the column 4 opposite to each other.

Also, the bolt 32 is in the upper hole 31 and the piston rod 16 is in the lowered position.

At this time, if the lever 35 is on the lock side as shown by the solid lines in FIGS. 2 and 3, the push rod 18 becomes free and
As shown in FIG. I, the spool valve 22 is pushed up by the hydraulic pressure in the lower chamber 26, and the valve 22 closes the lower portion of the valve chamber 23.

Therefore, there is no common oil in the upper chamber 25 and the lower chamber 26,
The table 7 does not move because 16 is fixed with respect to the cylinder 15.

Next, when the outer end of the lever 35 is lifted upward as shown by the chain line in FIG. 3 to the lock release side, the inner end pushes down the push rod 18.

Therefore, as shown in FIG. 6 II, the spool valve 22 is pushed down by the rod 18, the lower end of the valve chamber 23 is opened and communicates with the lower chamber 26, and the lower chamber 26 and the upper chamber 25 communicate with each other through the orifice hole 24.

Therefore, the piston 21 freely moves up and down together with the rod 16, and the table 7 moves up and down together with the piston 16.

After setting the table 7 to an arbitrary height in this way, the lever 35
When the outer end of is pushed down to the lock side as shown by the solid line in FIG. 3, the pushing of the push rod 18 by the inner end of the lever 35 is released,
The spool valve 22 closes the lower end of the valve chamber 23 and locks the piston 21 as shown in FIG.

To tilt the table 7 from the horizontal state of FIGS. 2 and 3 as shown in FIG. 4, loosen the lower bolt 9 and move it outward, and tighten the upper bolt 8. The table 7 is inclined as shown in FIG.

At this time, a protrusion may be provided on the lower edge of the table 7 so that the object on the table 7 does not slip off.

[Effect of device]

In this invention, a hollow erecting column having a table at the upper end is fitted into the hollow fixed column that is fixed on the base as described above, a free lock cylinder is fitted in the elevating column, and the lower end is connected to the fixed column. The piston rod protruding from the upper end of the free lock cylinder is connected to the upper end of the lifting column, and the operation lever for pushing or freeing the upper end of the push rod fitted in the piston rod is attached to the upper end of the piston rod. Therefore, the table can be fixed at an arbitrary height by operating the operation lever and raising and lowering the table.

In addition, a swing frame fixed to the lower part of the table is swingably attached to the upper end of the lifting column by a horizontal axis, and the inner ends of the adjusting bolts screwed into the upper and lower screw holes on one side wall of the swing frame are attached to the lifting column. The table can be fixed at any angle by loosening or tightening the upper and lower bolts because it is crimped to the side wall, and the square tube connected to the lower end of the free lock cylinder has a hole at the lower end and a fixed strut. Since it can be mounted at an arbitrary height with respect to the fixed column by a fixing bolt inserted into any of the holes provided in a multi-stage, there is an effect that the range of height adjustment of the elevating column becomes extremely large.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing an embodiment of the present invention, FIG. 2 is a vertical sectional front view of the same as above, FIG. 3 is an enlarged vertical sectional front view of the upper part of the same, and FIG. A front view and FIG. 5 are enlarged vertical side views of the same, and FIGS. 6A, 6B, 6C and 6D are vertical sectional views for explaining the action of the free lock cylinder. 1 ... Base, 3 ... Fixed support, 4 ... Lifting support, 5 ...
Swing frame, 6 ... Horizontal axis, 7 ... Table, 8, 9 ... Adjusting bolt, 15 ... Free lock cylinder, 16 ... Piston rod, 18 ... Push rod, 35 ... Operating lever.

Claims (1)

[Scope of utility model registration request] Claims: 1. A hollow elevating column is fitted into a fixed column composed of a square tube fixed on a base, and a free-lock cylinder is fitted in the elevating column, and a plurality of them are respectively opposed to opposite side walls of the fixed column. Holes are provided in a multi-step manner, and the holes are provided so as to face the opposite side walls of a rectangular tube that is vertically movably fitted in the fixed strut, and the fixing bolts inserted into the holes provided at any steps of the fixed strut. Piston rod protruding from the upper end of the free-lock cylinder by connecting the lower end of the free-lock cylinder to the upper end of the free-lock cylinder by fixing the above-mentioned square cylinder at an arbitrary position in the fixed column with a wing nut. The upper end of the receiving frame is connected to the upper end of the lifting column, the upper end of the push rod fitted in the piston rod is projected into the receiving frame, and the receiving frame contacts the upper end of the push rod.
An operation lever for pushing or freeing this push rod is swingably mounted, and a rectangular rectangular tubular swing frame with an open lower end fixed to the lower part of the table is swingable by the horizontal shaft at the upper end of the lifting column. The press pieces attached to the inner ends of the upper and lower adjusting bolts screwed into the upper and lower screw holes of one side wall of the swing frame so as to be swingable are crimped to the side surfaces of the lifting column. An elevating table in which a stopper is provided on the other side wall of the oscillating frame so as to contact the side surface of the elevating column when the table is horizontal.