JP3056114B2 - table - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention enables safe and reliable vertical movement of a top plate with a mounted article such as OA equipment, and can easily and surely maintain a desired height thereof. The present invention relates to a table capable of obtaining a large head lift.

[0002]

2. Description of the Related Art Conventionally, as a table capable of adjusting the height of a top plate, for example, Japanese Patent Publication No. 55-2287 discloses a table.
A top plate is supported by a pair of leg frames constituting a pantograph link mechanism so as to be able to move up and down, and the frame can be turned upside down by a gas spring.

[0003] However, the above-mentioned thing is, due to the mechanism of the leg frame,
The support force of the top plate is likely to fluctuate.For example, when the top plate descends, if the leg frame is tilted at a certain angle, the support force of the top plate by the frame decreases, and the top plate tends to descend rapidly. This tendency is remarkable when a heavy object such as an OA device is placed on the top plate, which may cause the heavy object to fall or fall. For this reason, the tilt angle of the leg frame is usually regulated,
In that case, there is a problem that the head lift becomes small and the range of use becomes narrow.

[0004] Further, when the top plate is moved up and down with the OA equipment or the like mounted thereon, the gas springs are overloaded, which causes a problem that the elevating speed of the top plate is reduced and it is difficult to set a desired height. . For this reason, there is a problem that it is necessary to temporarily lower the mounted object at the time of elevating and lowering the tabletop, and to mount the object after elevating the tabletop, so that the height adjustment of the table is troublesome and troublesome.

[0005] Further, after the top plate is adjusted to a predetermined height, the stationary state of the leg frame mainly depends on the action of the gas spring. There are problems such as rattling and slight movement, and the mounting state of the top plate becomes unstable.

[0006]

SUMMARY OF THE INVENTION The present invention solves the above-mentioned problems, and allows the top plate to be safely, reliably and easily moved up and down with a mounted article such as OA equipment. It is an object of the present invention to provide a table capable of easily and surely holding a desired height of the table and obtaining a large head of the top plate.

[0007]

According to a first aspect of the present invention, a pair of links are rotatably connected to each other in an X-shape, and the upper ends of the links are rotated directly below the top plate. One upper shaft connected to the upper end of the link so as to be rotatable directly below the top plate, and
Are connected via a gas spring, and the link is foldable via the gas spring .
A cap cover is rotatably fitted to at least one end of the upper shaft, and the end of the cover and the other end of the upper shaft are
The cap is fixed to an end, as well as secure the opposite ends of the torsion bar to these caps, projecting a threadable torque lever adjusting screw on the cap cover, the
The screw shaft end of the adjusting screw can be abutted directly below the top plate to transmit the torsional force of the torsion bar to the top plate and assist in raising the top plate. Therefore, a uniform ascending and descending speed of the tabletop can be obtained, and when the tabletop descends as in the past, it descends rapidly from a certain height,
The mounted object does not move or fall, and the top plate can be moved up and down safely and reliably. In particular, this advantage is advantageous for vertical movement of the top plate when a heavy object is placed. therefore,
When moving the top plate up and down, there is no need to load and unload objects each time, and this can be done easily and a large lift of the top plate can be obtained.

According to a second aspect of the present invention, a pair of links are rotatably connected so as to intersect in an X-shape, and the upper ends of the links are rotatably connected directly below the top plate. A roller is rotatably provided on one of the upper shafts to which the parts are connected, so that the roller can be moved in parallel with the top plate, and the link and the top
The plate and the plate are connected via a gas spring.
In table foldable said link through the pulling, the roller can travel guide rails and pivotally connected to the vertically pair of mounting frame directly under the top plate, the upper straight of the rail Along with projecting overhanging pieces ,
A cam housing is integrated with one end of the guide rail.
The cam is rotatably and engageably provided inside the housing.
The cam is linked to a lever via a drive shaft,
It said cam through a chromatography operation engaged with the cam housing, when the upper rotation of the <br/> guide rail, said roller and enables sandwiched between the protruding piece and the guide rail, the lever operation
The lock state of the roller can be easily obtained, and the play and movement of the roller are prevented, thereby ensuring safety when using the top plate.

According to a third aspect of the present invention, the drive shaft is provided directly below the top plate.
Pivotally supported, a lever is attached to one end of the shaft,
A connecting pipe with the first operating plate fixed to the drive shaft is attached to be able to move.
And a connecting pipe is rotatably mounted on the drive shaft,
A second operating plate engageable with the first operating plate and the cam are fixed to the pipe.
When the lever is locked, it interlocks with the rotation of the first
To rotate the cam, and lock the roller linked to the lever.
Implement a locking mechanism. The invention according to claim 4 is characterized in that the first operating plate has
Connect one end of the ear and the other end to one end of the swing plate
The gas spring lock release switch is
To control the operation of the gas spring.
Operation of the gas spring by lever operation.
I have control.

According to a fifth aspect of the present invention, a pair of links are rotatably connected to each other in an X-shape, and the upper ends of the links are rotatably connected directly below the top plate, and the lower ends of the links are connected to each other. A roller is rotatably provided in the section, and the roller can be moved in parallel with the top plate, and a gas split is formed between the link and a portion directly below the top plate.
In a table which is connected via a ring, the link is foldable via the gas spring , a support frame is arranged in the moving direction of the roller, and a brake rod arranged coaxially with the roller along the support frame. Provided movably,
A nut is screwably provided at one end of the rod, and when the nut is screwed, the nut is pressed against the side surface of the support frame so that the movement of the brake rod can be prevented. A mechanism can be obtained and the mechanism can be made compact.

According to a sixth aspect of the present invention, a pair of links are rotatably connected so as to intersect in an X-shape, and the upper ends of the links are rotatably connected directly below the top plate. A roller is rotatably provided in the section, and the roller can be moved in parallel with the top plate, and a gas split is formed between the link and a portion directly below the top plate.
In a table which is connected via a ring, the link is foldable via the gas spring , a support frame is arranged in the moving direction of the roller, and a brake rod arranged coaxially with the roller along the support frame. Provided movably,
Brake lever with a brake cam at one end of the rod
Rotatably connected to support the cam indirectly or directly
A lock mechanism for the lower roller with a simple structure, which can be engaged with the side surface of the frame, and at the time of engagement , presses the side surface of the support frame through the cam to prevent the movement of the brake rod. Which can be used easily and quickly.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings. In FIGS. 1 to 15, reference numerals 1 and 2 denote a pair of front and rear columns which are arranged left and right apart from each other. Frames 3 and 4 are connected, and legs 5 and 6 are connected to lower ends of the columns 1 and 2, respectively. Height-adjustable leg seats 7, 7 are attached to the lower surfaces of the legs 5, 6, and are grounded to the floor 8.

A lower frame 9 is connected between the lower side frames 3 and 4, and a pair of support frames 10 are connected between the upper side frames 3 and 4. The support frame 10 is formed of a U-shaped member, and a guide rail 11 is provided at one end of the frame 10 to protrude inward.
Rollers 13, 13 integrated with the lower shaft 12 on the rail 11
Are rotatably supported, and the lower shaft 12 is supported by the support frame 10.
It is possible to move along.

The lower ends of the links 14, 14 are fixed to the lower shaft 12, and the other ends of the links 14, 14 are fixed to an upper shaft 15 made of steel pipe. A lower shaft 16 is pivotally connected to the other ends of the support frames 10 and 10 so that the lower ends of the links 17 and 17 are fixed to the shaft 16, and the upper ends of the links 17 and 17 are upper shafts. 18 and these links 1
A pin 19 is pivotably mounted at the center of the pins 4 and 17.

In the drawing, reference numeral 20 denotes a horizontally long rectangular top plate, on which the mounting frames 21 and 21 having a U-shaped cross section are mounted in parallel on the lower surface thereof. Is formed to have substantially the same width as the length of the side frames 3 and 4.

The upper shaft 15 is rotatably supported at one end of the mounting frames 21 and 21, and the upper shaft 1 is
8 is movably mounted. A guide rail 22 is swingably provided inside the other end of the mounting frame 21, and rollers 23, 23 integral with the upper shaft 18 are rotatably supported on the rail 22.

That is, the guide rail 22 is attached to the mounting frame 21.
A stopper 22a that restricts the movement area of the roller 23 is bent at one end thereof.
The stopper 22a is provided rotatably in the vertical direction with respect to the mounting frame 21 via a pin 56, and a cam housing 57 having a substantially U-shaped cross section is integrally formed at the other end of the rail 22.

A cam to be described later is rotatably and engagably accommodated inside the cam housing 57, and a rectangular through hole 58 is provided in the inner surface of the housing 57. A connecting tube has been inserted. In the figure, reference numeral 59 denotes a projecting piece projecting inward from the inner surface of the mounting frame 21, located just above the guide rail 22, and having the roller 2
3 is engageable, and a stopper 59a for restricting the movement area of the roller 23 is bent at one end.

One end of the upper shaft 15 is arranged inside the mounting frame 21, and the other end protrudes outside the other mounting frame 21, and cylindrical caps 24, 24 are fixed in both ends. I have. A square hole (not shown) is formed in the cap 24, and a prismatic torsion bar 2 made of spring steel is formed in the hole.
5 is press-fitted. In the embodiment, the bar 25 is obtained by cutting a material having a rectangular cross section.

In the figure, reference numeral 26 denotes a cap cover rotatably fitted on the peripheral surface of the projecting portion of the mounting frame 21. A torque lever 27 is provided on the peripheral surface of the cap cover. Is provided. Adjusting screw 2 on the screw 28
9 is screwed in so that the screw shaft end of the screw 29 can be brought into contact with a metal plate 30 attached to the lower surface of the top plate 20.

An intermediate portion of the links 14 is a horizontal frame 31.
In coupled, the base end portion of the gas spring 32 is pivotally attached rotatably to the frame 31, the bracket 34 of substantially U-shape at the tip of the piston rod 33 is attached. A lock release switch 35 for the gas spring 32 is provided on the outside of the bracket 34 so as to be able to protrude and retract, and the switch 35 always projects outside the bracket 34 so that the locked state of the gas spring 32 can be formed.

A rocking piece 36 is attached to the lock release switch 35.
The one end of the piece 36 is rotatably connected to the bracket 34 via a pin 37. At the other end of the swinging piece 36, a wire linked to a lever described later is hooked, and when adjusting the height of the table, the swinging piece 36 is rotated via the lever operation to push the switch 35, The locked state of the gas spring 32 can be released.

In the drawing, reference numeral 36a denotes a substantially semicircular engagement groove formed in the intermediate portion of the swinging piece 36, which is engaged with a pivot shaft described later to regulate the outward rotation angle of the swinging piece 36. doing. Reference numeral 38 denotes a horizontal frame fixed to one end of the mounting frames 21 and 21. A frame 39 having a substantially U-shaped cross section is fixed inside the center of the frame 38.
The bracket 34 is rotatably connected to the bracket 9 via a pivot 40. Reference numeral 41 denotes a latch provided at the tip of the piston rod 33, through which the wire is inserted.

First and second operating plates 42 and 43 and a cam 44 are rotatably supported between one ends of the mounting frames 21 and 21, and their operations are controlled by the rotation angle of a lever 45. doing. The first operating plate 42 is formed in a vertically-long rectangular shape, and reinforcing pieces 42a, 42a are formed on both sides of the first operating plate 42, and the pair of first operating plates 42 are arranged apart from each other, and one end thereof is connected. It is fixed to the peripheral surface of the tube 46 in the same phase.

One of the first operation plates 42 has a first
A notch groove 47 is formed at the other end of the operation plate 42.
Is connected to the other end of the wire 48. Then, a drive shaft 49 is inserted into the connecting pipe 46, and the driving shaft 49 is rotatably supported by the mounting frames 21 and 21 through a connecting pipe described later. The assembly of the plate 42 is fixed to the drive shaft 49.

The second operating plate 43 is formed in a rectangular shape which is shorter and shorter than the first operating plate 42, and has reinforcing pieces 43 a bent on both sides thereof, and one end of the plate 43 is connected to one end of the connecting pipe 51. It is fixed to the surface. The tongue piece 5 is provided at the other end of the second operation plate 43.
2 is provided so as to protrude to the side and is engageable with the first operation plate 42.

The cam 44 is composed of a substantially lemon-shaped plate cam, and its contour curves are a semicircular portion 44a of the base circle and a semicircular portion 4a.
4a, the main portion of which is formed by a straight line parallel to the diameter of the semicircular portion 44a.
Is engageable with the inner surface of the second member.

The connecting pipe 51 has the same diameter as the connecting pipe 46,
6, the cam 44 is fixed to the other end of the tube 51. At this time, the second operating plate 43 and the straight portion of the offset portion 44b are Are positioned parallel to each other.

Then, a pair of assemblies of the second operation plate 43 and the cam 44 is disposed between the connecting pipe 46 and the mounting frame 21, and the driving shaft 49 is inserted into the connecting pipes 51, 51. The assembly is rotatably supported on a drive shaft 49. Therefore, the assembly is not fixed to the drive shaft 49. At that time, the tongue pieces 52 are positioned behind the first operation plate 42, and they are arranged so as to be engageable.

Therefore, the first and second operating plates 42,
43 and the cam 44 are rotatable about a drive shaft 49, and the drive shaft 49 and the first operating plate 42 are rotated synchronously,
Although the second operation plate 43 and the cam 44 rotate synchronously, the first operation plate 42 and the second operation plate 43 are basically configured to be unable to rotate synchronously.

When the first operating plate 42 rotates in the direction of the arrow A in FIG. 10, the operating plate 42 engages with the projecting piece 52 and pushes the second operating plate 43, thereby causing the first and second operating plates 43 to move. The two operation plates 42 and 43 can be moved together. On the other hand, the first operation plate 4
2 rotates in the direction of the arrow B in FIG.
Is stationary, and only the first operation plate 42 is rotatable.

The lever 45 is disposed obliquely downward at a position just below the side of the top plate 20 and outside the mounting frame 2, and has a hollow shaft cylinder portion 45a at the tip of a rectangular plate serving as a grip portion. One end of the drive shaft 49 is inserted into the shaft cylinder 45a, and a screw 53 is screwed into the one end to be integrally attached to the drive shaft 49.

In the figure, reference numeral 54 denotes a wire guide disposed close to one of the first operation plates 42 having a notch groove 47, which is disposed so as to restrict the movement of the wire 48, and 55 is provided on the lower surface of the top plate 20. The other end of the drive shaft 49 is rotatably supported by a bearing.

The table constructed in this way is composed of columns 1,
A pair of links 14 and 17 constituting a so-called pantlav link mechanism are arranged in an X-shape between the support frame 10 erected between the upper ends of the two and the mounting frame 21 fixed to the lower surface of the top plate 20. And one of the links 14, 14 and the mounting frame 2
A gas spring 32 is disposed between the top plate 2 and the top plate 21.
0 can be moved up and down

A torque lever 27 is provided on one side directly below the top plate 20 so as to be rotatable in the vertical direction, and an adjustment screw 29 is provided on the tip thereof so as to be rotatable in the horizontal direction, and a lever 45 is provided on the other side. Are provided so as to be rotatable in the vertical direction. The torque lever 27 is not used when, for example, the top plate 20 is not loaded, the adjusting screw 29 is loosened, and its screw shaft end is
Away from

Therefore, the torque lever 27 is placed substantially parallel to the top plate 20 as shown in FIG. 1, the tip end thereof is located at the highest position, and the cap cover 26 is placed in a state where the rotation angle is zero. . Accordingly, the torsion bar 25 linked to the cover 26 has a twist angle of zero, and no torsional force is formed on the bar 25, so that the top plate 20 is not affected by the torque lever 27.

On the other hand, when the table is not used, for example, the lever 45 stops obliquely downward, the first operating plates 42 and 42 that move together with the lever 45 stop in a vertical state, and the second operating plate 42 Reference numeral 52 is engaged with the first operation plate 42 and is stationary in a vertical state.

The operation of the cam 44 is restricted by the second operation plate 43, and the cam 44 is always stationary with the eccentric portion 44b being vertical, and the inner surface of the cam housing 57 is engaged with the upper peripheral surface thereof. The guide rails 22 integrated with the rollers maintain a horizontal state, and the rollers 23 are accommodated on the rails 22.

This situation is as shown in FIG. 12, in which the rocking piece 36 is released from the pulling force of the wire 48 to allow the unlocking switch 35 to protrude, and is urged upward by the switch 35 to rotate the pivot 40 Is engaged. As a result, the protruding state of the lock release switch 35 is maintained, and the locked state of the gas spring 32 is maintained.

In order to place a heavy object such as an OA device on the top plate 20 under such circumstances and raise it, first screw in the adjusting screw 29 and abut the end of the shaft against the contact plate 30. And screw it in further. In this way, the torque lever 27 is pushed around the cap cover 26 in the counterclockwise direction in FIG.
24, the torsion bar 25 press-fitted therein, and the upper support shaft 15 move together, and the torsion bar 25 is twisted about the other cap 24 as a starting point.

Therefore, the torsional moment by the torsion bar 25 acts upward on the top plate 20 from the end of the screw shaft of the adjusting screw 29 via the contact plate 30. In this case, the screwing amount of the adjusting screw 29 is adjusted in accordance with the weight of the OA device or the like, and as a guideline, the torsion angle of the torsion bar 25 is used. It is desirable to attach it around the part.

After the above adjustment, the turning angle of the torque lever 27 is held by the screwing of the adjusting screw 29 and the screw portion 28, and one end of the torsion bar 25 is connected to the cap 24, the cap cover 26, the torque lever 27, The above-mentioned twist angle is maintained. The other end of the torsion bar 25 maintains the torsion angle by the cap 24, the upper support shaft 15, the links 14, 17 connected to the shaft 15, and the gas spring 32 connecting the link 14 and the mounting frame 21. , And maintain the adjustment state.

In such a situation, the user puts his hand on the lever 45 and turns it around the drive shaft 49 clockwise in FIG. By doing so, the drive shaft 4 is integrated with the lever 45.
9 rotates, the connecting pipe 46 moves together with this, the first operating plates 42, 42 rotate in the same direction, and one end of the wire 48 connected to one operating plate 42 is moved to the left in the upper figure. Move to

For this reason, one end of the wire 48 is pulled to the left in FIG. 12, and the swing plate 36 connected to the other end is
6 is rotated counterclockwise in FIG. 6 to push the lock release switch 35 against its elasticity to release the locked state of the gas spring 32. This situation is as shown in FIG. The first operation plate 42 is positioned horizontally and obliquely downward.

Accordingly, the piston rod 33 of the gas spring 32 extends, and the rollers 13 and 23 move on the guide rails 11 and 22 in the directions of the upper and lower support shafts 15 and 16,
The links 14 and 17 stand on the upper and lower support shafts 15 and 16 as fulcrums. Then, when the top board 20 has moved to a desired height, the lever 45 is released.

In this manner, the tension of the wire 48 is lost, the pressing force of the rocking plate 36 against the lock release switch 35 is lost, and the switch 35 protrudes due to its own elasticity, and the locked state of the gas spring 32 is formed. I do. As a result, the extension displacement of the piston rod 33 is maintained, and the predetermined rising angles of the links 14 and 17 are maintained.
The top plate 20 holds a predetermined height, and the table can be used.

In this case, since the semicircular portion 44a of the cam 44 is engaged with the cam housing 57, the height of the guide rail 22 is not changed, and the horizontal state at the same height as that of FIG. 12 is maintained.
Further, the top plate 20 receives the torsional moment of the torsion bar 25 as described above, and is urged to rise.
Even if a heavy object such as an OA device is placed, the ascending speed of the top plate 20 does not decrease and the setting of the desired height does not become difficult. Can be obtained. Therefore, it is possible to eliminate the trouble of removing the object to be mounted when the top plate 20 is raised and installing the mounted object after the ascent, unlike the related art.

After the locked state of the gas spring 32 is formed,
The oscillating plate 36 is urged by the lock release switch 35 to rotate upward around the pin 37, and the wire 48 follows this, and the first operating plate 42 is drawn counterclockwise in FIG.
The lever 45 moves together with this, and the first operation plate 42 and the lever 45 return to the original positions in FIG.

On the other hand, according to the present invention, the use of the table is made safer and more comfortable by operating the lever 45 after forming the use state of the table. That is, after the use state of the table is formed, the lever 45 is rotated counterclockwise in FIG.

In this way, the first operating plates 42, 42 rotate integrally with the lever 45, and the projecting pieces 52, 52 engage with them, whereby the second operating plate 43 is pushed and turned in the same direction. The cam 44 integral with the plate 43 moves together. And lever 4
When the cam 5 is positioned vertically, one end of the offset portion 44b of the cam 44 engages with the inner surface of the cam housing 57 as shown in FIG.
The housing 57 is slightly pushed up.

Further, when the lever 45 is rotated in the same direction,
As shown in FIG. 15, the entire area of the offset portion 44b engages with the inner surface of the cam housing 57, and the housing 57 is
It is pushed up by the cam lift h of b. For this reason, the guide rail 22 integrated with the cam housing 57 rotates clockwise in FIG.
3 moves in contact with the inner surface of the overhanging piece 59 and is held between the overhanging piece 59 and the guide rail 22.

As a result, the backlash and movement of the rollers 23, 23 are prevented, the generation of abnormal noise when using the table is prevented, and the top plate 20 is prevented from sinking, so that the safety in use is ensured. .

Next, when lowering the height of the top plate 20 from the above-mentioned state, the user puts his hand on the lever 45 and turns it around the drive shaft 49 clockwise in FIG. In this way, the connection pipe 51 and the first operating plate 42,
42, the engagement between the operating plate 42 and the protruding piece 52 is released, and the second operating plate 43 rotates in the same direction.

For this reason, the connecting pipes 51, 51 are connected to the lever 45.
, The cam 44 moves in the same direction, and the eccentric portion 44b retreats from the inner surface of the cam housing 57, and the cam lift with respect to the housing 57 is reduced as a whole. Accordingly, the cam housing 57 moves slightly downward from the locked state in FIG. 15, and the guide rail 22 integrated with the housing 57 rotates counterclockwise in FIG.

As a result, the roller 23 moves to the guide rail 22
The roller 23 is released from the locked state, that is, released from the pinching action between the protrusion 23 and the overhanging piece 59. And lever 45
Is further rotated in the same direction, and the rocking plate 36 is rotated counterclockwise in FIG. 6 via the tension of the wire 48 to push the lock release switch 35 to release the locked state of the gas spring 32. This situation is as shown in FIG.

When the top plate 20 is pushed down in such a situation, the rollers 13 and 23 move on the guide rails 11 and 22 in the direction opposite to the upper and lower support shafts 15 and 16, and the link 1
4 and 17, the upper and lower support shafts 15 and 16 are tilted about the fulcrum, and the piston rod 33 of the gas spring 32 is pressed and contracted following this, and the top plate 20 moves downward.

When the top 45 has been lowered to a desired height, when the lever 45 is released, the tension of the wire 48 is lost, and the pressing force of the rocking plate 36 against the lock release switch 35 is lost. Protrudes due to its own elasticity, and forms a locked state of the gas spring 32. As a result, the extension displacement of the piston rod 33 is maintained, the predetermined inclination of the links 14, 17 is maintained, the top plate 20 maintains the predetermined height, and the table can be used.

In this case, since the top plate 20 receives the torsional moment of the torsion bar 25 as described above and is replenished with its ascending ability, the top plate 20 drops rapidly even when a heavy object such as an OA device is placed. The object placed on the top plate 20 is not shaken and falls down, and a safe and stable use state can be obtained.

Particularly, in the case of a table employing a pantograph link mechanism, when the table 20 is lowered by a certain amount or more, the table descends rapidly, and the object placed on the table 20 fluctuates or falls down. The conventional problem that the lowermost position of the top plate 20 is limited and the top plate 20 is reduced in height as a result is solved.
A high head of 0 is obtained, and the range of use is expanded.

FIGS. 16 to 18 show another embodiment of the present invention, in which the same reference numerals are used for components corresponding to those of the above-described embodiment. Of these, FIGS.
Shows a second embodiment of the present invention. In this embodiment, instead of locking the roller 23 by the lever 45, the brake rod 60 penetrates through the lower shaft 12 disposed between the support frames 10, 10, and A lock nut 61 is screwed into one end of the rod 60, and nuts 63, 63 are screwed into the other end via a rubber packing 62. In the drawing, reference numeral 64 denotes a guide groove formed in the support frame 10 and regulates the movement of the brake rod 60 inserted into the groove 64.

The nuts 63 are always loosely attached to the brake rod 60 and allow the brake rod 60 to move along the guide grooves 64. On the other hand, when maintaining the adjustment height of the top plate 20, the nuts 63, 63 are tightened, and the rubber packing 62 is pressed against the outer surfaces of the support frames 10, 10,
This is performed by preventing the movement of the brake rod 60. Therefore, there is an advantage that the operation can be directly and easily performed as compared with the above-described locking method, and the locking can be securely performed with less trouble. Further, the space required for the lock operation can be made more compact than the lock method described later.

Therefore, in this embodiment, the first
In addition, the second operating plates 42 and 43, the connecting pipes 46 and 51, the cam 44, the lever 45, the wire 48, and the like are not required, and the configuration is simplified accordingly.

The gas spring 32 is fixed to the mounting frame 21, and the upper shaft 18 is linked to the piston rod 33 of the gas spring 32.
The engagement piece 65 is arranged so as to be able to abut on 5. Engaging piece 6
5 is provided on the drive shaft 49, and a lever 66 is provided on the shaft 49. The lever 66 is rotated, the engagement piece 65 is moved, and the lock release switch 35 is made operable. .

FIG. 18 shows a third embodiment of the present invention.
This embodiment corresponds to an application of the second embodiment. Instead of screwing a nut 63 into one end of a brake rod 60, a brake lever 67 is pivotally attached to one end of the brake rod 60 so as to be rotatable. Is provided with a brake cam 68 at a pivot portion, and the cam 68 can be engaged with the flange portion 69 a of the spacer 69.

The spacer 69 is inserted into one end of the brake rod 60, and its flange 69a is
Is engaged. The brake lever 67 is always positioned coaxially with the brake rod 60. At this time, the brake cam 68 releases the engagement with the flange portion 69a, and allows the brake rod 60 to move along the guide groove 64.

When the height of the top plate 20 is to be maintained, the brake lever 67 is held, and the brake lever 67 is pivoted at a substantially right angle with the pivot as a fulcrum.
9a. By doing so, the brake cam 6
8 presses the cam lift flange 69 a and presses the rubber packing 62 against the outer surface of the support frame 10 to prevent the brake rod 60 from moving. Therefore, compared to the above-described locking method, there is an advantage that locking can be performed simply and quickly because the screwing operation of the nut is not required.

[0067]

The invention of claim 1 as described above according to the present invention is fitted to cap cover rotatably on at least one end portion of the upper side shaft, the other end of the upper shaft and the end portion of the cover the cap is fixed to the parts, both the torsion bar to these caps
As well as secure the ends, adjusted to the cap cover Ne
A torque lever capable of screwing the screw is protruded so that the screw shaft end of the adjusting screw can abut directly below the top plate, so that the torsion bar torsion force is transmitted to the top plate. Can help the rise. Therefore, a uniform ascending and descending speed of the tabletop can be obtained, and when the tabletop descends, it descends rapidly from a certain height, so that the mounted object does not move or fall, The movement can be performed safely and reliably. In particular, this effect is advantageous for the vertical movement of the top plate when a heavy object is placed. Therefore, when moving the top plate up and down, there is no need to load and unload the mounted object each time, and this can be easily performed, and a large lift of the top plate can be obtained.

[0068] According to a second aspect of the invention, the roller can travel guide rails and pivotally connected to the vertically pair of mounting frame directly under the top plate, projecting pieces on a straight of the rail And a cam at one end of the guide rail.
A housing is provided integrally, and a cam is provided inside the housing.
The cam is provided so as to be rotatable and engageable, and the cam is
The cam is connected to the cam via the lever operation.
Engages managing, the time above the rotation of the guide rail, because the said rollers allow sandwiched between the <br/> protruding piece and the guide rail, volumes of the lock state of the roller by the lever operation
It is easy to obtain and can prevent backlash and movement of the roller , and can secure safety when using the top plate.

According to a third aspect of the present invention, the drive shaft is provided directly below the top plate.
Pivotally supported, a lever is attached to one end of the shaft,
A connecting pipe with the first operating plate fixed to the drive shaft is attached to be able to move.
And a connecting pipe is rotatably mounted on the drive shaft,
A second operating plate engageable with the first operating plate and the cam are fixed to the pipe.
When the lever is locked, it interlocks with the rotation of the first
The cam is rotatable, so the roller linked to the lever
Can be realized. According to a fourth aspect of the present invention, one end of the wire is connected to the first operating plate, and the other end is swung.
Connected to one end of the moving plate, and a gas spring
Arrange the lock release switch and operate the gas spring.
Movement can be controlled.
The operation of the ring can be easily controlled.

According to a fifth aspect of the present invention, a support frame is disposed in the direction of movement of the roller, a brake rod disposed coaxially with the roller is provided movably along the support frame, and a nut is screwed on one end of the rod. The nut is pressed into contact with the side surface of the support frame when the nut is screwed, so that the movement of the brake rod can be prevented, so that a lock mechanism for the lower roller can be obtained with a simple configuration. The mechanism can be made more compact.

According to a sixth aspect of the present invention, a support frame is disposed in the direction of movement of the roller, and a brake rod disposed coaxially with the roller is movably provided along the support frame, and a brake cam is provided at one end of the rod. The brake lever provided is rotatably connected so that the cam can be indirectly or directly engaged with the side surface of the support frame, and at the time of the engagement, the side surface of the support frame is pressed against the cam via the cam to move the brake rod. Can be prevented, a lock mechanism for the lower roller can be obtained with a simple configuration, and this can be used easily and quickly.

[Brief description of the drawings]

FIG. 1 is a front view showing an embodiment of the present invention, and shows a state in which a top plate is moved up and down.

FIG. 2 is a plan view of FIG. 1, showing a situation from below a top plate.

FIG. 3 is a plan view of FIG. 1;

FIG. 4 is a right side view of FIG.

FIG. 5 is a partially enlarged view of FIG. 3, showing how the lever and the first and second operation plates are attached;

[6] a partial enlarged view of FIG. 1, a gas spring and the first,
2 shows the state of attachment of the operation plate and the swing plate.

FIG. 7 is a perspective view showing a lock mechanism of an upper roller applied to the present invention.

FIG. 8 is an exploded perspective view showing an assembled state of a distal end portion of a gas spring applied to the present invention.

FIG. 9 is a plan view showing a main part of the present invention, and shows a mounting state of a torsion bar, a cap cover, and a torque lever.

FIG. 10 is a perspective view showing an assembled state of the first and second operation plates, the cam and the lever applied to the present invention.

FIG. 11 is an exploded perspective view showing an assembled state of the first and second operation plates, the cam and the lever applied to the present invention.

FIG. 12 is an explanatory diagram showing an operation state of the first and second operation plates, the cam and the lever applied to the present invention, and shows a neutral state of the lever (in a normal state).

FIG. 13 is an explanatory view showing an operation state of the first and second operation plates, the cam and the lever applied to the present invention, and illustrates gas operation by the lever.
It shows the unlocking status of the pulling .

FIG. 14 is an explanatory view showing an operation state of the first and second operation plates, the cam and the lever applied to the present invention, and shows a state in which the upper roller is being locked by the lever;

FIG. 15 is an explanatory view showing an operation state of the first and second operation plates, the cam and the lever applied to the present invention, and shows a lock state of the upper roller by the lever.

FIG. 16 is a front view showing the second embodiment of the present invention, and shows a state in which a top plate is lifted and lowered.

FIG. 17 is an enlarged plan view illustrating a main part of a lock mechanism of a lower roller applied to the second embodiment.

FIG. 18 is a front view illustrating a third embodiment of the present invention, and is an enlarged plan view illustrating a main part of a lock mechanism of a lower roller applied to the third embodiment.

[Explanation of symbols]

10 the support frame 11, 22 guide rails 13, 23 rollers 14 and 17 links 15, 18 upper shaft 20 the top plate 21 mounting frame 24 the cap 25 torsion bar 26 cap cover 27 torque lever 28 threaded portion 29 adjusting screw 32 moths Susupurin grayed 35 Rock Release switch 36 Swing link 42 First operating plate 43 Second operating plate 44 Cam 45 Lever 46,51 Connecting pipe 48 Wire 49 Drive shaft 57 Cam housing 59 Overhanging piece 60 Brake rod 63 Nut 67 Brake lever 68 Brake cam

Claims (6)

(57) [Claims] An upper end of the link is rotatably connected to a pair of links crossing in an X shape, an upper end of the link is rotatably connected directly below a top plate, and an upper end of the link is connected. The upper shaft is rotatably supported directly below the top plate, and the link and the top
The lower part is connected via a gas spring and the gas spring
In a table in which the link is foldable through a ring, a cap cover is rotatably fitted to at least one end of the upper shaft, and an end of the cover and the upper shaft are connected to each other.
A cap is fixed to the other side end , and both ends of the torsion bar are fixed to these caps, and a torque lever capable of screwing an adjustment screw to the cap cover is protruded,
A table wherein a screw shaft end of the adjusting screw can be abutted directly below a top plate. 2. A pair of links in which a pair of links are rotatably connected so as to cross in an X-shape, an upper end of the links is rotatably connected directly below a top plate, and an upper end of the links is connected. A roller is rotatably provided on the upper shaft of the motor so that the roller can be moved in parallel with the top plate.
A guide rail capable of running the rollers on a pair of mounting frames disposed directly below the top plate so that the guide rails can be turned up and down in a table that is connected via a spring and the links can be folded through the gas springs. linked, as well as projecting the projecting pieces on <br/> straight of the rail, the guide rail
A cam housing is provided integrally at one end, and
A cam is provided so as to be rotatable and engageable inside, and the cam is
And the lever is operated through the lever operation.
Arm to engage the cam housing, the time above the rotation of the guide rail, characterized in that the roller allowed sandwiched between the protruding piece and the guide rail table. 3. A drive shaft is rotatably supported directly below the top plate,
A lever is attached to one end of the shaft, and a first operating plate is attached to the drive shaft.
The connecting pipe with the fixed
A connecting pipe is rotatably mounted on the shaft, and the pipe is engaged with the first operating plate.
Lock the second operating plate and cam that can be combined, and lock the lever
During operation, the cam can be rotated in conjunction with the rotation of the first operating plate
The table according to claim 2 . 4. One end of a wire is connected to the first operating plate,
Connect the other end to one end of the rocking plate, and
Place the ring unlock switch, the Gasusupuri
4. The table according to claim 3 , wherein the operation of the ring is controllable . 5. A pair of links intersecting in an X-shape and rotatable.
And the upper end of the link can be pivoted directly below the top plate.
Connected, a roller is provided rotatably at the lower end of the link,
The roller can be moved parallel to the top plate,
Link and link directly below the top plate via gas spring
And the link can be folded through the gas spring.
In the table, the supporting frame is moved in the moving direction of the roller.
And coaxially with the rollers along the support frame.
Movably installed brake rod, one end of the rod
A nut is screwably provided, and the nut is screwed when the nut is screwed.
Pressure on the side of the support frame to move the brake rod.
A table characterized by being able to block . 6. A pair of links are rotatably connected so as to intersect in an X-shape, and the upper end of the link is rotatably connected directly below the top plate, and a roller is rotated on the lower end of the link. Freely provided,
While the movable parallel to the top plate of the roller, the
Link and link directly below the top plate via gas spring
Then , in the table in which the link is foldable via the gas spring , a support frame is arranged in the moving direction of the roller, and a brake rod arranged coaxially with the roller is movably provided along the support frame. On one end of the rod
A brake lever with a brake cam is pivotally connected.
And the cam can be indirectly or directly engaged with the side of the support frame.
To, upon engagement, press-contact support frame side surface via the cam, characterized in that to enable preventing movement of the brake rod table.