JP3097056B2 - table - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention enhances the strength of a pillar portion engaged with a roller to prevent its deformation,
The roller engaging force can be adjusted so that smooth and stable operation of the roller can be obtained for a long period of time, and maintenance for roller wear and replacement can be realized and easily performed. About the table.

[0002]

2. Description of the Related Art Conventionally, for example, Japanese Unexamined Patent Publication No. Hei 6-181817 discloses that a support column is provided on a base, and a support column is provided on a cylindrical portion constituting the base. A supporting frame is provided at the upper end of the column so as to be vertically movable, and a supporting frame on which a drafting table is placed is provided, and a gas spring for height adjustment is accommodated inside the supporting column. Then, a pair of rollers are turned around and fixed to the peripheral surface at the lower end portion of the support column, and the rollers are arranged so as to be able to abut on the inner surface of the cylindrical portion so as to prevent rattling of the support column. Was.

However, in the above structure, since the roller is in contact with the inner surface of the flat surface of the cylindrical portion, if the roller is brought into close contact, the inner surface of the cylindrical portion is deformed, and the support column moves smoothly and vertically. In addition, there is a problem that the roller is worn out due to aging, and when replacing the roller, it is necessary to remove the base and pull out the supporting column, which makes the operation large and complicated.

[0004]

SUMMARY OF THE INVENTION The present invention solves such a problem, strengthens the strength of a column portion engaged with a roller, prevents deformation thereof, and makes it possible to adjust the engaging force of the roller. It is an object of the present invention to provide a table capable of obtaining smooth and stable operation of a roller for a long period of time, realizing maintenance for abrasion and replacement of the roller, and easily performing the maintenance.

[0005]

For this reason, the invention of claim 1 provides a column having an inner / outer multiple tube structure so as to be extendable and contractable.
Attach the base to the lower end of the outer column, and place it on the innermost column.
A mounting plate is provided at the end so as to be attachable, and an outer surface of the inner support is provided.
The roller support frame is attached to the
Is rotatable and has a tapered part.
A pair of adjusting pieces are arranged at upper and lower positions of the roller support frame, and
The adjustment piece is moved up and down via the adjustment screw, and the rollers are
In a table in which approach and separation can be adjusted to the corner portion side of the outer support with respect to the outer support, the outer support is vertically positioned on the roller support frame.
A shaft supporting groove that opens to the column side, and the shaft of the roller is provided in the groove;
The roller is detachably accommodated, and the roller can be easily attached and detached.
It is in so that perform the maintenance easily.

According to a second aspect of the present invention, the roller support frame
An adjusting piece is mounted on the lower end so as to be vertically movable via the adjusting screw.
And the taper portion of the adjusting piece is arranged to be engageable with the support shaft.
Mounting of the adjusting piece and the position of the roller via the adjusting screw.
Adjustments can be made quickly and maintenance is simple.
One quickly done is to so that.

According to a third aspect of the present invention, there is provided a method according to
A bottom plate having a plurality of through holes is provided at an end, and
Position the screw in accordance with the head position of the adjustment screw.
We are in so that can be performed to simplify the maintenance.

[0008]

[0009]

[0010]

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings. In FIGS. 1 to 10, reference numeral 1 denotes a square base plate which is a base which can be seated on a floor surface. Is provided with a through hole 2 and a plurality of through holes 3 are formed therearound.

A column 4 is erected on the base plate 1,
The strut 4 comprises first to third struts 5, 6, 7 of the same height,
These are formed by welding a pair of strut pieces having a substantially U-shaped cross section, forming a prismatic shape, a square tube having a similar cross section in the embodiment,
These are configured to be vertically expandable and contractible. In the figure, 5
Reference numerals a, 6a, and 7a denote corners formed at the four corners of the first to third columns 5, 6, and 7, respectively.

The first column 5 is formed in the shape of a largest rectangular tube, and its lower end is fixed to the base plate 1. The first column 5 is positioned at the lowest position when the column 4 is extended, and the bottom plate 8 is welded to its lower end. ing. The bottom plate 8 is formed with a through hole (not shown) at a position corresponding to the through hole 3, a nut (not shown) is welded to the inner surface of the bottom plate 8 facing the hole, and the nut is inserted through the through hole 3. Screws or bolts (not shown) are screwed in to fix the first support 5 to the base plate 1.

A pair of through holes 9 and 10 are provided at diagonal positions on the outer peripheral portion of the bottom plate 8, and these positions are coaxial with first and second adjustment screws described later. A tool 11 such as a screwdriver or a box wrench capable of rotating the adjustment screw can be inserted through the components 9 and 10.

The second support column 6 is formed in a medium rectangular tube shape and is accommodated in the first support column 5 so as to be vertically movable.
Is positioned between the first and third struts 5, 7 when elongate. Further, the third support column 7 is formed in a minimum rectangular tube shape and is housed inside the second support column 5 so as to be vertically movable.
Is positioned at the highest position when elongating.

The corner portions 6a of the second and third columns 6, 7
On the outer surface of 7a, similar vertically long roller supporting frames 12, 12 are provided, and the frame 12 has a vertically long rectangular ring shape,
Its length is almost half of that of the second and third columns 6 and 7, and
At the time of maximum extension of the first and second supports 5, 6 and a connection allowance Y of the second and third supports 6, 7 (X>
It is formed shorter than Y).

In the embodiment, the length of the roller support frame 12 is formed to be slightly shorter than the connection margin Y of the second and third columns 6, 7, and this is the lower half of the second and third columns 6, 7. Mounted on

The bending pieces 13 are provided on both sides of the roller support frame 12.
Are bent obliquely outward and are welded to the outer surfaces of the corners 6a and 7a of the columns 6 and 7. Roller support frame 1
A shaft support groove 14 is formed in the upper and lower positions of the two side pieces of the roller 2, and the support shaft 16 of the roller 15 is rotatably hung in the groove 14 and the hung position is adjusted by an adjustment piece and an adjustment screw described later. Making it possible.

The roller 15 includes first and second columns 5,
The inner surfaces of the six corners 5a and 6a are arranged so as to be engaged with each other at two positions on the inner surfaces of the corners 5a and 6a, that is, each of the inner surfaces orthogonal to each other.

In the drawing, reference numeral 17 denotes a screw hole provided at the upper and lower ends of the roller support frame 12, and 18 denotes an adjusting piece which is mounted on the upper and lower ends of the roller support frame 12 so as to be able to adjust the vertical position. The pair of bent pieces 19 are arranged to be engageable outside the roller support frame 12. The outer edge of the bent piece 19 is formed in a tapered shape, and the tapered portion 19 a is arranged so as to be able to engage with the peripheral surface of the support shaft 16.

The adjusting piece 18 is provided with a through hole 20, into which the first or second adjusting screw 21, 22 is inserted.
This is screwed into the screw hole 17. 1st or 2nd
The adjusting screws 21, 22 are substantially identical, and they are rollers 15, 15 provided on the second or third struts 6, 7.
Is adjustable in the front-rear direction. In the figure, reference numerals 21a and 22a denote first and second adjustment screws 21 and 21, respectively.
2 head.

The upper portion of the third pole 7 is closed by welding the cover 23, magnetic hole 24 is formed at the center of the cover 23,
The upper end of the piston rod 26 of the gas spring 25 is inserted into the hole 24, securing the end by screwing nuts (not shown) to the threaded portion of the upper end portion.

The length of the gas spring 25 is
The length is slightly shorter than the length of the columns 5 to 7, and the piston rod 26 can be extended and contracted by the fluid pressure sealed in the cylinder. The maximum stroke of the piston rod 26 is set to be shorter than the length of the first to third columns 5, 6, and 7. At this time, a margin for connection of the columns 5, 6, and 7 is formed, and the maximum stroke of the piston rod 26 at the time of extension is set. Ensures table stability and support strength.

On the other hand, a screw (not shown) is protruded from the lower end of the gas spring 25. The screw is inserted into the through hole 2, and a nut (not shown) is screwed into the through hole 2. Are fixed to the base plate 1.

On the inner surface of the upper end of the third support column 7, a pair of reinforcing frames 27 are fixed just above the cover 23.
The base end of the lever 28 is rotatably supported at an eccentric position between them. One end of a bracket 29 is fixed to the base end of the lever 28, and the other end is arranged so as to be able to contact the lock switch 30 of the gas spring 26.

The lock switch 30 is connected to the piston rod 26
The piston rod 26 is extended and retracted at the upper end thereof, and when it protrudes, the expansion and contraction operation of the piston rod 26 is locked, and when it is retracted, the lock is released and the expansion and contraction operation of the piston rod 26 is made possible.

The tip of the lever 28 is bent at a right angle, and when the gas spring 25 is locked, the bent portion 28a is disposed diagonally downward just below a top plate to be described later. In the figure,
Reference numeral 31 denotes a gripper 31 attached to the tip of the bent portion 28a.

A pair of inner frames 33 constituting a mounting frame 32 are fixed to the upper peripheral surface of the third support column 7 via bolts and nuts (not shown), and a pair of outer frames are provided at both ends of the frames 33, 33. Frame 3
4 is fixed via bolts and nuts (not shown), and a square top plate 35 as a mounting plate larger than the base plate 1 is mounted on the inner and outer frames 33 and 34 via bolts and nuts (not shown). Installed.

In addition, reference numeral 36 in the figure denotes a through hole formed in the center of the bottom plate 8 so that the gas spring 25 can be inserted thereinto.
Is a through-hole formed in the upper peripheral surface of the third column 7, and the lever 28
Can be inserted.

A cap (not shown) is removably mounted between the upper ends of the first and second columns 5, 6 to prevent intrusion of dust and dirt. A link (not shown) for linking and raising and lowering the columns 6 and 7 is provided inside the inside 7 so as to be freely disengageable.

That is, when the support 4 is raised, first, the third
The column 7 is raised by a full stroke, and the second column 6 can be raised thereafter. When the column 4 is lowered, the third column 7 is first lowered by a full stroke, and then the third column 7
Can be lowered.

In the above embodiment, the roller support frame 1
2, a screw hole 17 is provided, and a through hole 20 is provided in the adjusting piece 18. However, a through hole is provided in the roller support frame 12, a screw hole is provided in the adjusting piece 18, and the adjusting screws 21 and 22 are provided at shaft ends thereof. A flange for retaining may be provided. By doing so, it is possible to prevent the adjusting screws 21 and 22 from coming off, and to obtain a reliable displacement of the adjusting piece 18 by operating the screws 21 and 22.

In order to manufacture the table elevating mechanism constructed as described above, a steel plate is press-formed into a substantially U-shaped cross section to manufacture each column piece, and a corresponding pair is welded, and the same height and different diameter are obtained. First to third pillars 5, 6, and 7 having a rectangular cross section are manufactured.

The bottom plate 8 having a plurality of through holes 9 and 10
And a cover 23 having a through hole 24, and the bottom plate 8 is welded to one end of the first support column 5, that is, a lower end portion.
Is welded to one end of the third column 7, that is, the upper end.

Then, a predetermined number of roller support frames 12 and adjusting pieces 18 are manufactured by press-forming a steel plate, and the base plate 1 having the through holes 2 and the plurality of through holes 3 is manufactured. In this case, since the roller support frame 12 and the adjusting piece 18 can be shared by the columns 6 and 7, they can be manufactured rationally as compared with the case where these are configured for each column. Roller 1
5 and the first and second adjustment screws 21 and 22
7, the parts can be managed rationally.

Next, the bent pieces 13, 13 of the roller support frame 12 manufactured as described above are connected to the corners 6 of the lower half of each of the columns 6, 7.
a, 7a positioned on the outer surface and welded.

In order to assemble these parts after producing them, for example, the first support 5 is placed on a flat work table with the bottom plate 8 on the lower side, and the lower end of the support 5 is set on the lower side. Then, the second support 6 is inserted in the same phase as the first support 5. The second support 6 is provided with the shaft support groove 1 of each roller support frame 12.
The support shaft 16 is inserted into each of the frames 4 and 14, and the adjustment piece 18 is temporarily fixed to the lower end of the frame 12 via the first adjustment screw 21.

Accordingly, the second support 6 is inserted smoothly and stably along the inner surface of the corner 5 a of the first support 5 with the rollers 15, and the lower end of the support 6 contacts the inner surface of the bottom plate 8. When you touch, finish inserting. Under such circumstances, the second support 6 is completely housed inside the first support 5,
Since each roller 15 is disposed so as to be able to engage with the inner surface of the corner 5 a of the first support 5, the roller 15 is prevented from falling out of the shaft support groove 14.

Thereafter, the third column 7 is inserted in the same phase as the second column 6 with the lower end of the second column 6 from below. Similarly to the second support 6, the third support 7 has a support shaft 16 inserted into the shaft support grooves 14 of each roller support frame 12, and a lower end of the frame 12 via a second adjustment screw 22. The adjustment piece 18 is temporarily fixed.

Therefore, the third support 7 is inserted smoothly and stably along the inner surface of the corner 6 a of the second support 6 with the rollers 15, and the lower end of the support 7 contacts the inner surface of the bottom plate 8. When you touch, finish inserting. Under such circumstances, the third support 7 is completely housed inside the second support 6,
Since each roller 15 is disposed so as to be engageable with the inner surface of the corner 6 a of the second support 6, the roller 15 is prevented from falling out of the shaft support groove 14.

In this case, the third column 7 contains a reduced gas spring 25 therein, the lower end of which is inserted into the through hole 25 of the base plate 1, and the upper end of the piston rod 26 is inserted into the through hole 24 of the cover 23. , And a nut (not shown) is screwed into the nut to fix the upper end of the gas spring 25.

In this manner, when the first to third columns 5 to 7 are accommodated in the base plate 1 in the form of an inner / outer triple cylinder, the adjusting piece 18 is fitted to the upper end of the roller support frame 12 from above each column 5 to 7, This is connected to the first or second adjusting screw 21,
Temporarily fixed to the roller support frame 12 via 22.

At this time, the adjusting piece 18 is configured such that the tapered portion 19a of the bending piece 19 engages with the rear peripheral surface of the support shaft 16 inside each of the columns 5 and 6, and pushes the shaft 16 forward to move the roller. Fifteen
Can be engaged with the inner surfaces of the corners 5a, 6a of the first and second columns 5, 6. Therefore, the roller 15 is
From being trapped.

In this case, each roller 15 has a first and a second
It engages with the inner surfaces of the columns 5 and 6 and moves into the shaft support groove 14, and the tapered portion 1 of the bent piece 19 is formed on the rear peripheral surface of the shaft 16.
9a is engaged. Therefore, before the first or second adjusting screws 21 and 22 are adjusted, each adjusting piece 18 is stationary at a position slightly separated from the upper and lower ends of the support frame 12 as shown in FIG.

Under these circumstances, the first and second adjusting screws 21 and 22 are screwed in to adjust the amount of forward projection of each roller 15 so that the corners 5 of the first and second columns 5 and 6 are adjusted.
a, a suitable contact surface pressure on the inner surface, that is, an engaging force is obtained. Of these, the adjusting screws 21 and 22 disposed above the second and third columns 6 and 7 open the upper portions of the columns 6 and 7, respectively. Into the head 21a, 22a of the
Rotate this and screw it in

In this way, the heads 21a, 22
a is displaced downward, and the adjusting piece 18 engaging with this moves together, and the tapered portion 19a on the large diameter side is engaged with the rear peripheral surface of the support shaft 16, and the shaft 16 is moved forward, that is, the first And the second support 5,
The roller 15 moves toward the inner surface of the corners 5a and 6a of the roller 6, and the roller 15 moves together therewith. Therefore, by adjusting the screwing amounts of the adjusting screws 21 and 22, an appropriate engaging force of the roller 15 with respect to the inner surfaces of the first and second columns 5 and 6 can be obtained.

On the other hand, the adjusting screws 21 and 22 arranged below the second and third columns 6 and 7 insert the driver 11 through the through holes 9 and 10 formed in the bottom plate 8 as shown in FIG. Are inserted into the heads 21a and 22a of the screws 21 and 22, and this is turned and screwed. By doing this,
As described above, an appropriate engaging force of the roller 15 with respect to the inner surfaces of the first and second columns 5, 6 can be obtained.

In this case, the roller 15 is engaged with two positions on the inner surfaces of the first and second columns 5, 6 which are orthogonal to each other to disperse the above-mentioned engaging force. Part 5
a and 6a, there is no fear that the periphery of the engaging portion is deformed by the engaging force.

After the position of the roller 15 has been adjusted,
Assemble the third pillars 5, 6, 7 into the base plate 1
Place the gas spring 25 on the plate 1
And a nut is screwed into the threaded portion.

Further, the through hole 3 of the base plate 1 is aligned with a nut (not shown) on the back surface of the bottom plate 8, and a bolt or a screw is inserted into the through hole 3, and this is screwed into the nut, and the above-mentioned assembly is screwed. Is fixed to the base plate 1.

Next, the lever 28 is inserted into the through hole 37 of the third support column 7, and the lever 28 is rotatably bridged between the reinforcing frames 27, 27, and a bracket 29 is integrally attached to the end of the lever 28. One end of the bracket 29 is attached to the lock switch 30 of the gas spring 25 so as to be engageable.

Then, the inner frames 33 and 3 are formed on the outer surface of the third support 7.
3 is attached, and the lower surface of the top plate 35 is attached to the attachment frame 32, thereby completing a series of assembly.

In the table assembled in this manner, the lock switch 30 always projects upward to lock the gas spring 25, and the piston rod 26 is maintained in the currently extended state. At the time of the lock, one end of the bracket 29 is engaged with the lock switch 30, the end of the bracket 29 is urged upward, and the bent portion 28a of the lever 28 is directly below the top plate 35 as shown in FIG. Is located diagonally downward.

In such a situation, the holding portion 31 and the top plate 3
5 and the user lifts the grip 31 with the top plate 35 as a fulcrum. When this is done, the lever 28 rotates clockwise in FIG. 2, and the bracket 29 moves together with the lever 28 to push down the lock switch 30 and release the locked state of the gas spring 25.

Therefore, after that, when the top plate 35 is pressed downward, for example, the piston rod 26 contracts and the second column 6 is pushed down. After the column 6 is moved to the lowest position, the third column 3 is pushed down. Can be

On the other hand, when the locked state is released, the piston rod 26 extends and the third support 7 rises. After the support 7 moves to the highest position, the second support 6 rises. Such a series of lifting and lowering operations of the columns 6 and 7 are realized by a link (not shown) provided inside, and at this time, each roller 15 moves along the inner surfaces of the first and second columns 5 and 6.

In this case, each roller 15 has a first and a second
Since the pillars 5 and 6 move along the inner surfaces of the corners 5a and 6a, the pillars 5 and 6 move more stably and smoothly than those moving on a flat inner surface, thereby preventing vibration of the top plate 35 and forming a horizontal surface thereof. Prompt.

Further, each roller 15 is provided at the corners 5a, 6a.
Since it moves by contacting the two positions on the inner surface, the moving posture is more stable than that of the conventional one contacting at one position, and together with the above, the above-mentioned effects are enhanced.

On the other hand, the roller 15 is worn by aging, and its function is deteriorated or needs to be replaced.
In such a case, the cap (not shown) attached between the upper ends of the first and second posts 5 and 6 is removed, the upper ends are opened, and the upper first and second posts 1 and 2 are opened via the driver 11 in the same manner as described above.
If the two adjusting screws 21 and 22 are screwed in, the roller 15 projects forward and recovers the intended function.

Also, by removing the base plate 1, the first plate
When the bottom plate 8 of the support 5 is opened, the driver 11 is inserted into the through holes 9 and 10 provided in the bottom plate 8 in the same manner as described above, and the lower first and second adjustment screws 21 and 22 are screwed. Protrudes forward and restores its intended function.

On the other hand, when the roller 15 is severely worn and needs to be replaced, the mounting frame 32 is removed from the third column 7 and a nut (not shown) at the lower end of the gas spring 25 is loosened to remove the second and third rollers. The support pillars 6 and 7 are taken out, the support shaft 16 is pulled out from the shaft support groove 14, the roller 15 is removed, and a new roller 15 is replaced. After the replacement, assembly may be performed in the same manner as in the above-described assembly.

As described above, according to the present invention, the position of the roller 15 can be adjusted or replaced, so that the maintenance of the roller 15 can be realized and the stable and smooth operation of the roller 15 can be obtained for a long period of time.

[0063]

As described above, according to the first aspect of the present invention, the roller
A shaft support groove is provided at the top and bottom of the support frame,
The shaft of the roller is detachably housed in the groove.
Maintenance, such as roller replacement, is simple and quick.
Perform effect there Ru to the speed.

According to a second aspect of the present invention, the upper and lower ends of the roller support frame are provided.
The adjustment piece is attached to the part via the adjustment screw so that it can move up and down.
And, the tapered portion of the adjusting piece is arranged so as to be engageable with the support shaft.
Therefore, the adjustment piece can be attached and
Position adjustments quickly and maintain
It can be easily performed .

According to a third aspect of the present invention, the lower end of the outermost support is provided.
A bottom plate having a plurality of through holes formed therein, and
Since it is arranged corresponding to the head position of the adjusting screw, the lower row
There is a simple and easy to perform that effect La maintenance.

[0066]

[0067]

[0068]

[Brief description of the drawings]

FIG. 1 is a plan view showing an embodiment of the present invention, in which a top plate is omitted.

FIG. 2 is a front view showing the embodiment of the present invention, and shows a maximum extension state of the column.

FIG. 3 is an exploded perspective view showing a main part of the embodiment of the present invention.

FIG. 4 is a plan view showing an assembled state of a pillar which is a main part of the embodiment of the present invention, in which a cover of a third pillar is omitted.

FIG. 5 is a bottom view showing an assembled state of a pillar which is a main part of the embodiment of the present invention.

FIG. 6 is a side view showing an assembled state of a roller support frame, which is a main part of the embodiment of the present invention, showing a state before adjustment of the rollers.

FIG. 7 is a plan view of FIG. 6;

FIG. 8 is an exploded perspective view showing an assembled state of a roller support frame which is a main part of the embodiment of the present invention.

FIG. 9 is a perspective view showing a state of maintenance according to the present invention, and shows an adjustment state of a roller disposed on an upper portion of a support.

FIG. 10 is a perspective view showing a state of maintenance according to the present invention, showing an adjustment state of a roller disposed at a lower portion of a support.

[Explanation of symbols]

 Reference Signs List 1 base (base plate) 4 support 5 first support 6 second support 7 third support 5a, 6a, 7a corner 8 bottom plate 9, 10 through hole 12 roller support frame 14 shaft support groove 15 roller 16 support shaft 18 adjustment Piece 19a taper portion 21 first adjusting screw 22 second adjusting screw 21a, 22a screw head 32 mounting frame 35 mounting plate (top plate)

Claims (3)

(57) [Claims] 1. A strut having an inner / outer multiple tube structure is provided so as to be extendable and contractible,
Attach the base to the lower end of the outermost support, and
A mounting plate is provided at the upper end of the column so as to be attachable,
A roller support frame is attached to the outer surface of the
The roller is rotatably mounted and has a tapered part.
A pair of adjusting pieces to be arranged at the upper and lower positions of the roller support frame.
Then, the adjusting piece is moved up and down via an adjusting screw,
Can be adjusted toward and away from the corner of the outer column facing the
In the table, the vertical position of the roller support frame
A shaft support groove that opens to the outer support side is provided, and the roller is provided in the groove.
A table characterized in that the support shaft is detachably accommodated . 2. The adjusting screw is provided on upper and lower ends of the roller support frame.
The adjustment piece is vertically movably mounted via the
The table according to claim 1 , wherein a taper portion is disposed so as to be able to engage with the support shaft . 3. A plurality of through holes are formed at a lower end of the outermost support.
A formed bottom plate is provided, and the through hole is formed at a head portion of the adjusting screw.
3. The table according to claim 2 , wherein the table is arranged corresponding to the position .