JPH11278005A - Stop device for table - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a stop device for a table to simply and reliably stop or move a table through simple operation, block oscillation of a caster during the use of a table, improve its stability, and improve the appearance of the periphery of a caster. SOLUTION: A stud 3 is fixed at the lower end part of a stay to support a top plate and a plurality of casters (4,) 5 are rotatably mounted on the stud 3. At least one of the casters (4,) 5 is stopped and a holder shaft 11 on which the stop caster 5 is mounted is mounted on the stud 3. A lock shaft 14 is vertically slidably arranged at the internal part of the holder shaft 11. The upper end part of the lock shaft 14 is engageably arranged at an engaging means. A lock piece 25 is arranged at the lower end part of the lock shaft 14 and an annular lock piece support 24 is arranged at the side of the stop caster 5. The lock piece 25 is disengageably arranged at the lock piece support 24.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention can easily and reliably stop or move a table by a simple operation, prevent the caster from swaying when the table is used, improve its stability, and improve the appearance around the caster. The present invention relates to a stop device for a table or the like which improves the performance.

[0002]

2. Description of the Related Art A movable table having a movable floor surface is provided with an appropriate stopper device in order to secure stability during use. For example, in Japanese Patent Application Laid-Open No. 8-336431, a pair of casters are attached to the front and rear of a pillar, and a stopper is provided at the rear end of the pillar.

The above-mentioned stopper is provided with a pair of operating levers which can be stepped on so as to be engageable with each other. ing.

When the table is used, one of the operation levers is depressed, the stopper shaft projects downward to touch the floor, and the rear caster is pulled up from the floor. On the other hand, when the table is moved, the other operation lever is pressed. Depressing and raising the stopper shaft raises the floor from the floor, so that the rear casters touch the floor.

However, in this conventional table, it is troublesome to step on the two operation levers, and when the table is used, the rear end of the pedestal is slightly displaced upward, so that the top plate is slightly lowered forward. There was a concern that the stability of the object placed on the tabletop might be affected.

[0006] Recently, there is a type in which a table can be used and moved by pushing down or pulling up a top plate to move up and down a stopper shaft attached to a caster at the rear end of a pillar. That is, the top plate is pushed down when using the table, and the stopper shaft is projected downward to contact the floor surface while the rear caster is kept in contact with the floor surface. Is lifted off the floor to allow the casters to travel.

[0007] However, this conventional table is cumbersome because it requires pushing down or pulling up the top plate each time the table is used and moved, and it does not have a proper means for preventing rotation and swinging of the caster itself. Therefore, the casters fluctuate due to vibrations and shocks when the table is used, and there is a concern that the casters are unstable, and the casters and the stopper shaft are provided side by side at the rear end of the pillar, resulting in poor appearance.

[0008]

SUMMARY OF THE INVENTION The present invention solves such a problem, and can easily and reliably stop or move the table by a simple operation, and can prevent the caster from oscillating when using the table, thereby stabilizing the table. It is an object of the present invention to provide a stopping device such as a table that improves the appearance and the appearance around the casters.

[0009]

According to a first aspect of the present invention, a pillar is fixed to a lower end of a column supporting a top plate, and a plurality of casters are rotatably mounted on the column. In a stopping device such as a table in which a holder shaft for mounting the stopable caster is mounted on the pillar, a lock shaft is provided inside the holder shaft so as to be slidable up and down. While the upper end of the shaft is arranged to be engageable with the engagement means, a lock piece is provided at the lower end of the shaft, and an annular lock piece receiver is provided on a side of the caster that can be stopped,
The lock piece is provided so as to be detachable from the lock piece receiver, so that the conventional arrangement of the caster and the stopper shaft is eliminated, the appearance around the caster is improved, and the lock piece and the lock piece receiver are engaged at the time of engagement. The rotation of the caster is prevented, the swing of the caster when the table is used is reliably prevented, and the stable and reliable use state of the table is obtained, and the rotation of the caster is released when the lock piece and the lock piece receiver are disengaged. It makes it possible to move the table.

According to a second aspect of the present invention, the engaging portion between the lock piece and the lock piece receiver is formed in an irregular shape that can be engaged with each other, so that the lock piece and the lock piece receiver are securely and firmly engaged. I have. According to the third aspect of the present invention, since the engaging means is a pillar, the structure can be simplified without requiring a dedicated part for this purpose. According to a fourth aspect of the present invention, the engaging means is a lock link pivotally connected to the pillar so as to be rotatable,
A wire linked to the operation lever is connected to the link to realize the engagement between the lock piece and the lock piece receiver by the operation lever, so that the use state of the table can be easily obtained.

According to a fifth aspect of the present invention, the pedestal is movably mounted in the axial direction of the holder shaft, the pedestal is urged upward, and the pedestal is moved downward through the operation of pushing down the top plate. Then, the lock piece can be engaged with the lock piece receiver so that a stable use state of the table can be easily obtained.

According to a sixth aspect of the present invention, the cancel member is urged in the pillar so as to be movable in the holder axial direction, the cancel member is provided with an engaging portion, and the engaging portion is provided on the peripheral surface of the holder shaft. The engaging portion is engaged with the engaging portion when the lock piece and the lock piece receiver are engaged, and when the engagement between the lock piece and the lock piece receiver is released, The engagement between the engaging portion and the hook portion can be released, and the caster can be kept locked when the engaging portion and the hook portion are engaged, so that a stable use state of the table can be obtained. The unlocked state of the casters is guaranteed when the engagement between the joint and the hook is released, so that a stable table movement state can be obtained.

According to a seventh aspect of the present invention, a lock release button is provided at one end of the canceling member, and the release button is protruded from an end of the pillar, and is engaged with the engaging portion through a pressing operation of the release button. The engagement with the engaging portion can be released, so that the operation of raising the top plate as in the related art is eliminated, and the table can be easily moved.

According to an eighth aspect of the present invention, a wire linked to an operation lever is connected to one end of the cancel member, and the engagement between the engaging portion and the engaging portion can be released through operation of the operation lever. In addition, the complication of the conventional operation of raising the top plate is eliminated, and the table can be easily moved by operating the operation lever.

According to a ninth aspect of the present invention, a lock chamber having a circular cross section is formed inside a holder shaft facing a movement area of a lock shaft, and a plurality of engagement grooves are formed in a part of the inner peripheral surface of the chamber. A plurality of engagement teeth are provided on the peripheral surface of the lock shaft facing the lock chamber, and the engagement teeth can be engaged with and disengaged from the engagement grooves, so that the direction change of the caster can be easily prevented.

According to a tenth aspect of the present invention, when the lock piece and the lock piece receiver are engaged, the engagement teeth are engaged with the engagement grooves,
When the caster is locked, its running and direction change are prevented, the caster is reliably prevented from swaying, and the stable and reliable use of the table is ensured. The engagement between the engagement teeth and the engagement grooves can be released, so that the locked state of the caster can be released quickly.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of the present invention applied to a folding table will be described below. Referring to FIGS. 1 to 6, reference numeral 1 denotes a horizontally-long rectangular top plate, and a lower surface at both ends in the longitudinal direction. In the embodiment, the upper end of the column 2 is attached slightly to the front side from the center of the short side, and the pillar 3 is attached to the lower end thereof.
Is mounted horizontally.

The pillar 3 is formed to be slightly shorter than the short side of the top plate 1, and casters 4, 5 having the same diameter are mounted on both ends thereof so as to run on the floor 6. In the embodiment, a known caster 4 is attached to the front end side of the pillar 3, and a caster 5 having a lock switching mechanism is attached to the rear end side, and the distance between the casters 4, 5 and the support 2 is They are arranged approximately one to two.

The pillar 3 is made of an aluminum tube or a steel tube or a molded member thereof, and has a rear end portion inside.
A hollow cylindrical holder guide 7 is protruded, and a through hole 8 having substantially the same diameter as the inner diameter of the holder guide 7 is formed on the bottom surface of the pillar 3 immediately below the guide 7. In the drawing, 9 is a gap formed between the lower end of the holder guide 7 and the inner surface of the bottom of the pillar 3, and 10 is a projecting guide projecting downward from the outer opening edge of the through hole 8.

A cylindrical holder shaft 11 made of synthetic resin is vertically slidably housed in the holder guide 7 and the cylindrical guide 10, and has large and small-diameter concave holes 12 communicating with each other therein. Through holes 13 are formed, and a lock shaft 14 is inserted therein so as to be slidable up and down.

A flange 15 is provided at the upper end of the lock shaft 14.
The flange portion 15 can be brought into contact with a spring receiver 16 protruding from the upper inner surface of the pillar 3, and a first set spring 17 is inserted between the spring receiver 16 and the concave hole 12. The pillar 3 is urged upward through its elasticity.

A second set spring 18 is mounted on the upper peripheral surface of the lock shaft 14, and both ends of the second set spring 18 are seated on the bottom surface of the flange 15 and the concave hole 12.
8, the lock shaft 14 is urged upward through the elasticity of the lock 8, and the flange 15 is always in contact with the spring receiver 16.

A lock chamber 19 having a circular cross section is provided inside the lower side of the holder guide 7, the inner surface thereof is formed smoothly, and a plurality of engagement grooves 2 are formed in the lower half peripheral surface along the axial direction.
0 is formed, and the engaging teeth 21 can be engaged with the grooves 20.

A plurality of engaging teeth 21 are protruded from the lower peripheral surface of the lock shaft 14 along the axial direction, and have a tapered shape whose diameter is reduced downward as shown in FIG. The maximum outer diameter is formed to be substantially the same as the inner diameter of the lock chamber 19, and is housed slidably in the lock chamber 19.

In the figure, reference numeral 22 denotes a substantially semi-circular caster housing provided at the lower end of the holder shaft 11, which can rotate the caster 5 via a shaft 23 on a partition wall (not shown) provided at the center thereof. I support it. On the side surface of the caster 5, an annular lock piece receiver 24 having an uneven portion is provided, and a lock piece 25 is provided so as to be able to mesh with the lock piece receiver 24.

The lock piece 25 is formed in a substantially U-shape, and the rotation shaft 23 is disposed inside the lock piece 25 so as to be able to engage with the lock piece 25. Provided. One end of the lock piece 25 is connected to the lower end of the lock shaft 14, and the connecting piece 2
6 is arranged to be engageable with the lower end of the holder shaft 11.

On the other hand, a cutout hole 26 is formed at the rear end of the pillar 3, and a lock release button 27 is inserted into the hole 26 so as to be able to protrude and retract. One end of a cancel member 28 is connected to the inner end of the lock release button 27, and the cancel member 28 is accommodated in the bottom of the pillar 3 so as to be movable in the front-rear direction, and an upright piece 29 is formed at the other end.

A spring support 30 projects from the bottom inner surface of the pillar 3, and a return spring 31 is inserted between the spring support 30 and the upright piece 29. It is urged to the 11 side.

A long hole 32 capable of receiving the holder shaft 11 is formed in an intermediate portion of the cancel member 28, and a front edge portion of the hole 32, that is, an engaging portion 32a is movable in the gap 9. The engaging portion 32a is disposed on the caster 5
When a table is used to lock the holder shaft 11, it can be engaged with an annular engaging portion 33 formed on the peripheral surface of the holder shaft 11. In addition, in the figure, reference numeral 34 denotes a lock handle for operating the folding operation of the top plate 1, and 35 denotes a lock fitting.

Since the table thus constructed has a lock mechanism built into the caster 5 and the holder shaft 11, the structure is simpler than that of a conventional table having the caster 5 and the stopper shaft. The appearance is improved.

Next, when using the above table, FIG.
Then, the top plate 1 in the folded state is returned and rotated to form the set state shown in FIG. This situation is as shown in FIGS. 3 and 4, in which loads such as the top plate 1 and the support 2 are applied to the pillar 3 and are supported by the casters 4 and 5.

In this case, since the casters 4 and 5 are arranged at a ratio of about 1: 2 from the column 2, a load of about 1/2 of the caster 4 acts on the caster 5, and the first
And the second set springs 17 and 18 oppose each other, and slightly push up the rear end of the pillar 3 from the front end.

That is, in this case, the pillar 3 is
, The engagement between the portion 33 and the engaging portion 32a of the canceling member 28 is released, and the engaging portion 32a is engaged with the peripheral surface of the holder shaft 11. For this reason, the cancel member 28 has moved slightly forward, and the return spring 31 has been pressed and contracted accordingly, and the lock release button 27 has been drawn into the pillar 3.

Then, the lock shaft 14 is pulled up by the first and second set springs 17 and 18, the flange 15 at the upper end thereof comes into contact with the spring receiver 16, and the lock piece 25 at the lower end is pulled up to receive the lock piece receiver. 2
4 and disengage them. Therefore, in this case, the caster 5 can rotate and the floor 6
You can travel on it.

Further, the engagement teeth 21 integral with the lock shaft 14 move to the upper part of the lock chamber 19, and the engagement with the engagement groove 20 is released. This situation is as shown in FIG. Therefore, in this case, the lock shaft 14 is
Since the caster 5 can be turned around the axis inside, the direction of the caster 5 can be changed, and the table can be moved to a desired position.

Under such circumstances, when the center of the rear end of the top plate 1 is pressed down by human power, the pressing force is applied to the front and rear ends of the pillar 3 where the casters 4 and 5 are located via the support 2. Acting on the rear end of the pillar 3 on which the casters 5 are located, approximately half the pressing force of the front end acts.

With the above pressing force, the pillar 3 is pushed down against the elasticity of the first and second set springs 17 and 18, and the lock shaft 14 moves together with this, and the engagement teeth 21 are moved to the lock chamber 19. And engages with the engaging groove 20 as shown in FIG. 6 to prevent the lock shaft 14 from rotating around the axis. At this time, since the engaging teeth 21 are formed in a tapered shape, the engaging teeth 21 smoothly mesh with the engaging grooves 20.

Further, the lock piece 25 moves downward integrally with the lock shaft 18, and its engaging portion engages with the engaging portion of the lock piece receiver 24, thereby preventing the caster 5 from rotating around the shaft 23.

As a result, the caster 5 is prevented from running on the floor 6 and its direction is changed, thereby forming a locked state. In addition, since this state is formed by the engagement between the plurality of engagement teeth 21 and the engagement grooves 20 and the engagement between the lock piece 25 and the engagement portion between the lock piece receiver 24, a strong and reliable lock state can be obtained. . Therefore, even if one of the casters 4 fluctuates due to vibration, impact or the like during use of the table, this can be suppressed and a stable use state can be obtained.

And, by such a locked state,
The gap 9 of the holder guide 7 moves to the same height position as the hook 33, the cancel member 28 is pushed backward by the return spring 31, and the engaging portion 32a engages with the hook 33. For this reason, the holder shaft 11 is hung on the fixed position of the pillar 3, in other words, the pillar 3 is fixed at the fixed position of the holder shaft 11, holds the locked state, and pushes the lock release button 27 backward. Extrude.

At the time of such locking, the rear end of the pillar 3 moves downward from the original position by h, and the pillar 3 is set horizontally. Therefore, the support column 2 stands upright, and the top plate 1 is placed horizontally to form a stable use state. This state is as shown in FIG.

Next, when the table is to be moved to a predetermined position after the use of the table, the lock release buttons 27, 27 provided at the rear ends of the pillars 3, 3 are sequentially lightly kicked with the foot. By doing so, the cancel member 28 is connected to the return spring 3
The engaging portion 32a moves forward against the elasticity of 1 and the engaging portion 32a retreats from the engaging portion 33 to release the engagement therebetween.

Therefore, the pillar 3 is pushed up by the elasticity of the first and second set springs 17 and 18, and at the same time, the lock shaft 14 is moved by the set springs 17 and 18.
It is pushed up by the elasticity of 18.

As a result, the engagement teeth 21 move to the upper part of the lock chamber 19, disengage the engagement between the engagement teeth 21 and the engagement grooves 20, and recover the rotation of the lock shaft 14 around the axis. . In addition, the lock piece 25 is moved up with the lock shuff 14 to be lifted, and disengaged from the lock piece receiver 24,
Therefore, the casters 5 can rotate around the axis 23 so that the casters 5 can freely travel on the floor surface 6.

As described above, according to the present invention, since the lock release button 27 need only be lightly kicked with the foot when releasing the lock, the operation can be performed simply and quickly as compared with the conventional operation of lifting the top plate 1.

FIGS. 7 to 10 show another embodiment of the present invention, in which the same reference numerals are used for the portions corresponding to the above-described configuration. FIG. 7 shows a second embodiment of the present invention. In this embodiment, a holder shaft 11 is provided on the lower surface of the rear end of the pillar 3.
The lock shaft 14 is mounted on the shaft 11 so as to be slidable up and down, and a lock link 37 in the form of a straight rod is provided directly above the shaft 14 via a pin 36 so as to be rotatable in the up and down direction. I have.

Then, one end of the lock link 37 is provided so as to be engageable with the upper end of the lock shaft 14, one end of a wire 38 is connected to the other end, and the other end is pulled out above the pillar 3. This is connected to an operation lever (not shown) rotatably provided on the lower surface of the top plate 1 or the upper portion of the column 2. Then, the lock link 3 is operated via the lever operation.
By rotating the lock shaft 7 and the lock shaft 14, the engagement and disengagement operation between the engagement teeth 21 and the engagement grooves 20 and the lock piece 25 and the lock piece receiver 24 is realized.

That is, when the table is moved, the lock link 37 is held horizontally as shown in FIG.
4 is pulled up via the set spring 18 so that the engagement teeth 2
1 and the engagement groove 20 and the lock piece 25 and the lock piece receiver 24 are disengaged, so that the caster 5 can travel on the floor 6 and change its direction.

Next, when the table is used, the operating lever is operated, the wire 38 is pulled up and the lock link 37 is rotated, and one end of the lock link 37 is engaged with the upper end of the lock shaft 14, and the shaft 14 is set. 18 and the engaging teeth 21 and the engaging grooves 20 and the lock pieces 2
The lock piece 5 is engaged with the lock piece receiver 24 to prevent the caster 5 from traveling on the floor 6 and changing its direction.

As described above, this embodiment is realized by operating the operation lever instead of the operation of pressing down the top plate 1 and the operation of the lock release button 27 as described above. The number of parts is reduced and the configuration is simplified.

FIG. 8 shows a third embodiment of the present invention. This embodiment corresponds to an application of the second embodiment.
That is, the lock link 37 is formed in a substantially inverted L-shape,
A wire 38 connected to one end of the wire is pulled in the lateral direction along the pillar 3, and the other end is wired in the pillar 2 via a pulley (not shown) and connected to the operation lever. This is substantially the same as the second embodiment.

In this embodiment, compared to the second embodiment, the wires 38 are wired in the pillars 3 and the columns 2 to improve the appearance by exposing the wires 38.

FIGS. 9 and 10 show a fourth embodiment of the present invention. In this embodiment, the lock release button 27 is omitted, and instead, a cancel member 28 is slidably mounted on the spring receiver 30, and this is attached. It is urged rearward via a return spring 31.

At the rear end of the upright piece 29 of the canceling member 28, an engaging portion 32a is provided so as to project therefrom. The engaging portion 32a is provided at the upper and lower ends of the holder shaft 11, and the step portion 4 serving as the engaging portion 33 is provided.
0 is provided so as to be engageable.

Then, one end of the wire 41 is connected to the standing piece 29, and the other end is connected to the top plate 1 through the pillar 3 and the support 2.
Is connected to an operation lever (not shown) rotatably provided on the lower surface of the or on the support 2.

That is, in this embodiment, when the table is moved, the rear end of the pillar 3 is pushed up via the first and second set springs 17 and 18, and the lock shaft 14 is moved.
Are projected upward by the maximum displacement, and the engaging teeth 21 and the engaging grooves 2
The engagement between the lock piece 25 and the lock piece receiver 24 is released to enable the caster 5 to travel on the floor 6 and to change its direction. At this time, the engaging portion 32a is engaged with the flange portion 39 of the lock shaft 11, and the above state is maintained. This situation is as shown in FIG.

Next, when the table is used, the top plate 1 is pushed down, the pillar 3 is lowered via the support 2, the holder shaft 7 and the spring support 16 are moved together, and the spring support 16 is attached to the lock shaft 14. The contact teeth 21 and the engagement grooves 20
The lock piece 25 and the lock piece receiver 24 are engaged with each other to prevent the caster 5 from traveling on the floor 6 and changing its direction, thereby forming a locked state.

At this time, the upright piece 29 is pushed down integrally with the pillar 3, and when the upright piece 29 is lowered to a predetermined position, the engaging portion 32a engages with the step portion 40 to maintain the above-mentioned locked state. This situation is as shown in FIG.

On the other hand, when the table is to be moved to a predetermined position after use, the operating lever (not shown) is operated, the wire 41 is pulled in the direction of the arrow, and the canceling member 28 is moved in the same direction. Then, the engagement between the step portion 40 and the engagement portion 32a is released.

Then, the holder shaft 7 is pushed up via the first and second set springs 17 and 18, and the pillar 3 is moved together with the holder shaft 7, and the engagement between the lock shaft 14 and the spring receiver 16 is released. The original state of the shaft 14 is restored, and the engagement teeth 21 and the engagement grooves 20 and the lock piece 2 are recovered.
The engagement between the lock piece 5 and the lock piece receiver 24 is released, so that the caster 5 can travel on the floor 6 and change its direction. In this way, the pillar 3 moves up to a predetermined position, and the engaging portion 32a engages with the flange portion 39 to restore the original state.

That is, in this embodiment, the lock release button 27 is omitted, and this is realized by operating the lock lever.
The number of parts is reduced and the configuration is simplified.

In the above embodiment, the present invention is applied to a table. However, the present invention can be applied to a desk, another office machine, furniture, and the like.

[0063]

According to the first aspect of the present invention, a lock shaft is provided inside a holder shaft so as to be slidable up and down, and an upper end of the shaft is arranged so as to be engageable with an engagement means, while a lower end of the shaft is provided. In addition to providing a lock piece in the part, an annular lock piece receiver is provided on the side of the caster that can be stopped, and the lock piece is provided so as to be disengageable from the lock piece receiver. The appearance around casters can be improved by eliminating the installation. In addition, since the rotation of the caster is prevented when the lock piece and the lock piece receiver are engaged, the rocking of the caster when the table is used is reliably prevented, and a stable and reliable use state of the table can be obtained. The caster is allowed to rotate when the lock piece is disengaged from the lock piece receiver, so that the caster can travel on the floor and move the table.

According to the second aspect of the present invention, since the engagement portion between the lock piece and the lock piece receiver is formed in an uneven shape that can be engaged with each other, the lock piece and the lock piece receiver can be securely and firmly engaged. It is possible to improve the stability when using the table. According to the third aspect of the present invention, since the engaging means is a pillar, a dedicated component for this purpose is not required, and the configuration can be simplified. According to a fourth aspect of the present invention, since the engaging means is a lock link pivotally attached to the pillar and a wire linked to the operation lever is connected to the link, the lock lever and the lock piece receiver are connected by the operation lever. The engagement can be realized, and the use state of the table can be easily obtained.

According to a fifth aspect of the present invention, the pedestal is movably mounted in the axial direction of the holder shaft, the pedestal is urged upward, and the pedestal is moved downward through the operation of pushing down the top plate. Since the lock piece can be engaged with the lock piece receiver,
A stable use state of the table can be easily obtained.

According to a sixth aspect of the present invention, the cancel member is urged in the pillar so as to be movable in the axial direction of the holder, the cancel member is provided with an engaging portion, and the engaging portion is provided on the peripheral surface of the holder shaft. The engaging portion is engaged with the engaging portion when the lock piece and the lock piece receiver are engaged, and when the engagement between the lock piece and the lock piece receiver is released, Since the engagement between the engaging portion and the engaging portion can be released, the locked state of the caster is maintained when the engaging portion and the engaging portion are engaged, and a stable use state of the table can be obtained. In addition, when the engagement between the engaging portion and the engaging portion is released, the lock state of the caster is released, so that a stable table moving state can be obtained.

According to a seventh aspect of the present invention, a lock release button is provided at one end of the canceling member, and the release button is protruded from an end of the pillar, and is engaged with the engaging portion through a pressing operation of the release button. Since the engagement with the hook portion can be released, the complicated operation of raising the top plate as in the related art can be eliminated, and the table can be easily moved.

The invention according to claim 8 is such that a wire linked to the operation lever is connected to one end of the canceling member, and the engagement between the engaging portion and the engaging portion can be released through the operation of the operation lever. Therefore, the complication of the conventional operation of lifting the top plate can be eliminated, and the table can be easily moved by operating the operation lever.

According to a ninth aspect of the present invention, a lock chamber having a circular cross section is formed inside a holder shaft facing a moving area of a lock shaft, and a plurality of engagement grooves are formed on a part of the inner peripheral surface of the chamber. A plurality of engaging teeth are provided on the peripheral surface of the lock shaft facing the lock chamber, and the engaging teeth can be engaged with and disengaged from the engaging grooves. Therefore, the direction change of the caster can be easily prevented.

According to a tenth aspect of the present invention, when the lock piece is engaged with the lock piece receiver, the engaging teeth are engaged with the engagement grooves. Rocking of the table can be reliably prevented, stability during use of the table can be secured, and when the lock piece and the lock piece receiver are released from engagement, the engagement between the engagement teeth and the engagement groove can be released. Thus, the locked state of the casters can be quickly released, and the table can be moved quickly.

[Brief description of the drawings]

FIG. 1 is a front view showing an embodiment of the present invention, showing a use state of a table.

FIG. 2 is a front view showing the embodiment of the present invention, and shows a folded state when the table is not used.

FIG. 3 is an enlarged cross-sectional view showing a rear end portion of a pillar applied to the present invention and a mounting state of a caster, showing a state before locking of the caster.

FIG. 4 is a sectional view taken along line AA of FIG. 3;

FIG. 5 is an enlarged sectional view showing a rear end portion of a pillar applied to the present invention and a mounting state of a caster, showing a state after locking of the caster.

FIG. 6 is a sectional view taken along the line BB of FIG. 5;

FIG. 7 is a cross-sectional view illustrating a main part of a second embodiment of the present invention.

FIG. 8 is a sectional view showing a main part of a third embodiment of the present invention.

FIG. 9 is a cross-sectional view showing a main part of a fourth embodiment of the present invention, showing a state before locking of casters.

FIG. 10 is a cross-sectional view showing a main part of a fourth embodiment of the present invention, showing a state after locking of casters.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Top plate 2 Prop 3 Leg 4 and 5 Casters 11 Holder shaft 14 Lock shaft 19 Lock chamber 20 Engagement groove 24 Lockpiece receiver 25 Lockpiece 27 Lock release button 28 Cancel member 32a Engagement part 33 Hook part 37 Lock link 38, 41 wire

Claims (10)

[Claims] 1. A pillar is fixed to a lower end of a column supporting a top plate, and a plurality of casters are rotatably mounted on the column.
In a stopping device such as a table in which at least one of the casters can be stopped and a holder shaft for mounting the stopable caster is mounted on the pillar, a lock shaft is slidably provided vertically inside the holder shaft. The upper end of the shaft is arranged to be engageable with the engagement means, while a lock piece is provided at the lower end of the shaft, and an annular lock piece receiver is provided at a side of the caster that can be stopped, A stop device such as a table provided with a piece detachably engaged with a lock piece receiver. 2. The stop device for a table or the like according to claim 1, wherein an engagement portion between the lock piece and the lock piece receiver is formed in an uneven shape capable of meshing with each other. 3. The stopping device according to claim 1, wherein said engaging means is a pillar. 4. A stopping device for a table or the like according to claim 1, wherein said engaging means is a lock link pivotally connected to a pillar, and a wire linked to an operation lever is connected to said link. 5. The pedestal is movably mounted in the axial direction of the holder shaft, the urged column is urged upward, and the pedestal is moved downward through a pressing operation of the top plate, The stopping device for a table or the like according to claim 1 or 3, wherein the lock piece is engageable with the lock piece receiver. 6. A canceling member is movably urged in a direction of a holder axis in the pillar, and an engaging portion is provided on the canceling member, and the canceling member is engageable with the engaging portion on a peripheral surface of the holder shaft. A locking portion, the engagement portion is engaged with the locking portion when the lock piece and the lock piece receiver are engaged, and the engagement portion is engaged when the lock piece and the lock piece receiver are disengaged. The stopping device for a table or the like according to claim 5, wherein the engagement between the hook and the hook portion can be released. 7. A lock release button is provided at one end of the cancel member, and the release button is protruded from an end of the pillar.
7. The stopping device for a table or the like according to claim 6, wherein the engagement between the engaging portion and the engaging portion can be released through a pressing operation of the release button. 8. An end of said canceling member is connected to a wire linked to an operation lever, so that the engagement between said engaging portion and said engaging portion can be released through operation of said operation lever. A stop device such as a table described above. 9. A lock chamber having a circular cross section is formed inside a holder shaft facing a movement area of the lock shaft, and a plurality of engagement grooves are formed on a part of the inner peripheral surface of the chamber, and the lock chamber faces the lock chamber. Provide a plurality of engagement teeth on the peripheral surface of the lock shaft,
A stopping device such as a table in which the engaging teeth can be disengaged from the engaging groove. 10. The engagement teeth engage with an engagement groove when the lock piece and the lock piece receiver are engaged, and engage with the engagement teeth when the lock piece and the lock piece receiver are disengaged. The stopping device for a table or the like according to claim 9, wherein the engagement with the mating groove can be released.