JP2764853B2 - table - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a table provided with a lock means for maintaining a top plate rotatably supported on a column in a horizontal position when used and in a standing position when stored. .

[0002]

2. Description of the Related Art Conventionally, a table in which a top plate is turned upright to facilitate storage when not in use is well known. The table that rotates the table in the reverse direction holds the table horizontally when not in use, raises the table when not in use, and allows many tables to be placed close together in a narrow storage space. .
The rotary table is usually equipped with a lock device so that the top plate does not rotate during use and the top plate does not fall during storage or movement.

[0003] There have been many proposals for this locking device, but in many devices, the operating means for releasing and restraining the locked state, that is, the operating lever or the like, is usually located on the column supporting the top plate. It has become. One of the reasons that the operating means is incorporated on the side of the support is that the position does not move when rotating the top plate, so that it is easy to operate itself, and that the device is assembled in a fixed place to incorporate the device. It is considered that the design is easy because of the fact that it can be included.

[0004] However, it is stable and easy to operate the operating means only when the means for operating the unlocking and restraining operations is provided at a fixed position. In this kind of table where the rotation of the table is free, the top plate is left unattended, which is extremely dangerous.

[0005] In addition, the conventional table-top rotary table is provided with locking devices, for example, female and male engaging means, which are paired on the table-top side and the column side, so that they can be provided in a horizontal position and a standing position when not in use. It is known to employ a method of coupling and locking. However, since the locking devices are separated from each other during rotation of the top plate, there is a problem that smooth coupling is not achieved at the time of coupling, resulting in incomplete coupling. . In particular, the rotary table is large, and there is also a surface where it is difficult to obtain accuracy in supporting the spindle,
Separate locking devices have structural problems.

[0006]

DISCLOSURE OF THE INVENTION The present invention has been developed in view of such a conventional locking device in order to improve the problem. The main object of the present invention is to provide an operating means on a rotating top plate. It is an object of the present invention to provide a table capable of performing a rotation operation while supporting a top plate that can freely rotate when the rotation operation is performed during use or when not used. In addition, the present invention always associates the locking means for restricting the rotation of the top plate during the rotation operation as well as when the rotation is restricted, thereby avoiding the separation state, thereby solving the problem of the engagement as in the conventional device. And a table provided with a locking device for restricting the rotation of the top plate.

[0007]

That is, the present invention has been made based on the above object and is characterized in that a top plate is rotatably supported on a first support shaft provided at an upper end of an upright support column. One end of an operation lever is rotatably supported on a second spindle provided at a predetermined distance in the vicinity of the first spindle, and is arranged along the lower surface of the top plate at the other end of the operation free end. The operating lever is provided with a guide groove having a first locking portion and a second locking portion at both ends along the longitudinal direction in the middle of the length. A lock pin to be implanted on the top plate is slid into the guide groove, and when the top plate is in a horizontal position, the lock pin is engaged with a first locking portion of the guide groove to be horizontal. When the top plate is in the upright position, the lock pin is engaged with the second locking portion of the guide groove to hold the top plate in the upright position. On the other hand, the engagement of the lock pin is released by swinging the operation free end of the operation lever below the rear edge of the top plate, and the lock pin is guided in the guide groove to lock the other end. The table is characterized in that the table is rotatable and the tabletop is rotatable.

According to the present invention, in the above structure, a bracket is provided at an upper end of the support, and first and second support shafts are respectively implanted on the bracket, and a top plate is provided on the lower surface of the plate along the front-rear direction. And a lock pin is implanted in the top plate receiver, and a lock pin is implanted therein. The lock pin is slidably fitted into a guide groove of an operation lever supported on the second support shaft. It is an object of the present invention to provide a table characterized by being arranged side by side in the front-rear direction along a top plate receiver.

Further, according to the present invention, the guide groove formed in the operation lever is formed linearly along the length direction of the operation lever, and is provided with upward bent portions at both ends thereof. An object of the present invention is to provide a table characterized by providing a locking portion.

Another object of the present invention is to provide a table characterized in that the free end of the operating lever extends to near the rear edge of the top plate and an operating portion is provided at the free end.

According to the present invention, a spring is contracted between the top plate and the operation lever to constantly urge the free end of the operation lever downward to engage the first or second locking portion. An object of the present invention is to provide a table characterized by ensuring engagement of a lock pin.

Further, according to the present invention, a third support shaft is provided at the upper end of the support, and the front end of the shelf frame is supported on the support shaft, and a hanging rod is passed between the top plate and the shelf frame to rotate the top plate. An object of the present invention is to provide a table characterized in that the shelf frame is supported so as to rotate from a horizontal posture to a standing posture with the third support shaft as a fulcrum. Next, an embodiment illustrating a table according to the present invention will be described in detail, and other features will be clarified.

[0013]

1 shows an embodiment of a table according to the present invention. FIG. 1 is a rear view in a partially used state of use, FIG. 2 is a left side view of FIG. 1, and FIG. 4 is a rear view of the table partially omitted in FIG. 3, and FIG. 5 is an enlarged left side view of the table in a center longitudinal section in a used state. In the drawings, reference numeral 1 denotes a column formed in a symmetrical shape, and reference numeral 2 denotes a top plate supported by the left and right columns.

In this embodiment, the left and right support columns 1 are provided with horizontal support legs 3 integrally at the leg ends, are formed in a substantially L-shape, and have upper ends slightly inclined rearward. Casters 4 and 4 are provided. A bracket 5 for supporting the top plate 2 is provided at an upper end of the support, and a first support shaft 6 for bearing the top plate is planted on the bracket.

The top plate 2 is fixed to a bottom plate 7 made of a metal plate formed in an angled cross section on the lower surface of the right and left ends corresponding to the upper ends of the left and right columns 1 so that the length is aligned in the front-rear direction. The support shaft 6 is inserted through the top plate receiver 7 to be rotatably supported. In this embodiment, as shown in FIG. 9, a bolt is used for the support shaft 6. The bolt is inserted into a through hole 8 formed in the bracket 5, and then screwed into a nut 9 which is welded to the top plate receiver 7 and fixed. The top plate receiver is mounted on the bracket 5 via the bolt by tightening, and the bolt is rotatably supported on a fulcrum.

In the drawing, reference numeral 10 denotes an operation lever pivotally mounted at one end to a second support shaft 11 implanted on the bracket 5 and 12 is a guide formed in the middle of the length of the operation lever. The lock pin is slid into the groove 13. The second support shaft is a first support shaft 6 provided above the front end of the bracket 5.
It is provided so as to protrude inward at a substantially central portion of the bracket so as to be located further rearward and below, and has a required space with respect to the first support shaft 6.

The operation lever 10 supported on the second support shaft 11 extends rearward along the inner surface of the top plate receiver 7 so that its free end faces the lower surface of the rear edge of the top plate 2. The lock pin 12 protruding from the inner surface of the top plate receiver 7 is made to protrude into the guide groove 13. The operation lever 10 is formed of a strip-shaped metal plate, and the guide groove 13 is formed by punching the metal plate. An operation knob 10a is provided at the free end.

The guide groove 13 has a portion 13a formed by punching straight along the length direction of the lever 10, a first locking portion 14 which is bent upward at both ends of the straight portion 13a to form a recess. A second locking portion 15 is provided to form a substantially U-shape. The straight portion 13a of the guide groove 13 guides the lock pin 12 when the top plate 2 is rotated, as described later, and determines the rotation range. First and second locking portions provided at both ends thereof are provided. Part 14,
Numeral 15 engages and locks the lock pin and regulates the rotation of the top plate. The lock pin 12 is provided with a roller 16 on the peripheral surface of the shaft body.
Are slidably stopped by screws 17 so as to be freely movable through the rollers 16 with respect to the guide grooves 13.

In the drawing, reference numeral 18 denotes a shelf frame provided in parallel below the top plate, and 19 denotes a shelf frame which is hung so as to rotate while maintaining the parallel posture with the rotation of the top plate. It is a hanging rod to support. The shelf frame 18 is formed by bending a metal pipe material into a U-shape, crossing a pipe 18b of the pipe material between the arms 18a at the left and right ends, and penetrating the bracket 5 through the distal ends of the left and right arms 18a. It is rotatably supported by being supported by a third support shaft 20.

On the other hand, one end of the hanging rod 19 is rotatably mounted on the top plate receiver 7 to be suspended therefrom, and is suspended at a right angle from the lower edge of the operating lever 10 in the middle of the length. The other end of the guide frame 21 is inserted through a through hole formed in the guide frame 21, and the other end is pivotally connected to the shelf frame 18 via a pin 22 in the middle of the length of the arm 18 a. In this embodiment, a coil spring 23 is contracted at a portion between the upper shaft mounting end and the guide frame 21 so that the free end of the operation lever 10 is constantly pressed downward by the bias of the spring. It is.

In the drawing, reference numeral 24 denotes a reinforcing member extending between the left and right columns 1 and 1, and reference numeral 25 denotes a reinforcing member extending between the left and right top plate receivers 7, 7 similarly fixed to the lower surface of the top plate. The reinforcing member 24 may be directly passed between the columns, but in this embodiment, both ends of the reinforcing member 24 are fixed to the bracket 5 fixed to the upper end of the column.
After being integrated, a bolt 27 is inserted into the through hole 26 of the bracket.
, And screwed and fixed in a screw hole 28 provided in the column, whereby the left and right columns are connected to face each other. On the other hand, the reinforcing member 25 is provided along the lower surface of the top plate 2 so that both ends thereof are in contact with the inner surfaces of the left and right top plate receivers 7, and a nut 9 for receiving the first support shaft 6 is provided at both ends. The support shaft 6 made of a receiving bolt is tightened to be integrated with the top plate receiver 7.

The table according to the present invention is configured as described above. Next, the actual handling will be described while describing the details of the configuration. When used, the top plate 2 is in a horizontal position as shown in FIGS. 1 to 6. At this time, the first locking portion 14 of the guide groove 13 provided in the operation lever 10 is used.
And the lock pin 12 is engaged.

As described above, since the top plate 2 is supported by the first support shaft 6 so as to be freely rotatable, the top plate 2 itself can freely rotate on the support shaft 6 as a fulcrum. When the lock pin 12 is engaged with the first locking portion 14 as described above, the first support shaft 6 and the second support shaft 11 on which the operation lever 10 is pivoted are engaged with the first locking portion 14. Lock pin 1
Since the three members are fixed at the vertices of the triangle, the rotation of the top plate 2 is restricted by supporting the operation lever 10, and the top plate 2 is held in a horizontal posture. At this time, the operation lever 10 is urged downward by the spring 23 to prevent the lock pin 12 from coming off the first locking portion 14, so that the top plate is held in a stable horizontal posture. Become.

FIG. 5 shows a state in which the top plate 2 is held in a horizontal position. Next, in this state, when the knob 10 a of the lever 10 is pulled up against the spring 23, the lock pin 12 The inside moves to the end of the straight portion 13a, that is, the bent portion, and the restrained state is released. The two-dot chain line in FIG. 6 shows a state in which the lock pin 12 is released from the first locking portion 14 by pulling up the operation lever 10. Since the lock pin 12 in this state is in contact with one end of the guide groove 13, it does not rotate in the direction of pushing down the rear edge (the right end in FIG. 6) of the top plate, but in the opposite direction, that is, Since the guide groove is open toward the other end, it can freely move in this direction.

The two-dot chain line in FIG. 7 shows the way in which the lock pin 12 moves along the straight portion 13a of the guide groove 13. The movement of the lock pin 12 is performed by rotating the rear end portion of the top plate 2 in a direction in which the top pin 2 jumps up. When the top plate is rotated to a substantially upright state, the lock pin 12 is moved to the other end of the guide groove 13. Since the collision and the movement are restricted, the rotation of the tabletop stops at this point. At the same time as the stop, the operating lever 10 is pressed down by the spring 23 acting on the operating lever 10, so that the lock pin 12 is automatically engaged with the second locking portion 15, and its movement is restricted, and The plate 2 is fixed in the upright posture.

The solid line in FIG. 7 restrains the top plate 2 in the upright posture,
This shows a storable state. Here, the folding angle of the table 2 is adjusted to the rearward inclination angle of the column 1 so that a large number of tables can be stored close to each other with the tables being close to each other.

FIG. 8 shows the guide groove 13 of the operation lever 10.
FIG. 4 is an enlarged side view for explaining a relationship between the lock pin and a lock pin sliding thereon. As described above, when the lock pin 12 is engaged with the first locking portion 14 near the shaft attachment end of the operation lever, the top plate 2 is held in a horizontal position, the engagement is released, and the lock pin 12 is straightened. When moving the portion 13a, the top board 2 rotates with the support shaft 6 as a fulcrum in the upright direction.
Then, when the lock pin 12 engages with the second locking portion 15 at the other end, the rotation of the top plate is stopped and the top plate is restrained in an upright posture.

By the way, as is clear from the above description,
In the present invention, the top plate 2 rotates while the lock pin 12 moves along the linear portion 13a of the guide groove 13, and the rotation of the top plate is stopped when the top plate 2 abuts on the end of the guide groove. . Therefore, the rotation range of the top plate is linear portion 1
3a. In order to change the top plate that has been erected in the embodiment from the backward tilted posture to the vertically erected posture, the end on the second locking portion 15 side must be set. The rotation range can be easily changed by simply changing the design of the guide groove formed in the operation lever 10.

Further, when the top plate 2 supported in the horizontal position is tilted and supported slightly downward, the position of the first locking portion 14 may be shifted to the pivot end side. If it is desired to use both of the above-mentioned inclined postures, a third locking portion (not shown) is provided adjacent to the first locking portion 14 so that the lock pin 12 is selectively engaged. I just need. Of course, in order to stabilize the top plate 2 in the horizontal posture, the upper end of the support may be brought into contact with the lower surface of the top plate and restrained and supported together with the lock pin. At this time, a cap such as rubber should be attached to the upper end of the column to protect the contact part.

It is to be noted that the operating lever 10 is not obstructed from being provided for each of the left and right columns, but it is sufficient to equip one set (corresponding to the right column in the embodiment) as shown in FIG. Operation becomes easy. In particular, since the width of the table is widened, it is advantageous in terms of work to equip one of the columns with the column.

[0032]

Although the present invention has been described in detail with reference to the embodiment, according to the present invention, the operation lever 1 provided with the top plate 2 which is restrained in the horizontal posture or the standing posture along the lower surface of the top plate.
With the operation of 0, the lock pin 12 is disengaged from the lock pin 12 to freely rotate, and can be freely changed to another posture.
Since this operation can be performed by the operation lever that rotates and follows the rotating top plate, the operation of the operation lever and the work of supporting the top plate can be performed at the same time. There is an advantage that the work can be performed safely without danger of rotating. In particular, since the operation lever of the present invention has its free end facing the lower surface of the rear edge of the top plate, one worker supports the rear edge of the top plate with one hand and operates the operation lever with the other hand. Since the lock can be released, there is an advantage that the posture changing operation of the top plate can be performed easily and safely. In addition, in the present invention, the lock pin 12 and the guide groove 13 of the operation lever are always in a sliding relationship, and the rotation is regulated when the lock pin abuts on the end of the guide groove, so that the engagement is released, In addition, there is no danger of the top plate rotating excessively, which is safe. A locking portion is provided corresponding to the end of the guide groove, and the locking pin is automatically locked, so that the locking is achieved at the same time as the rotation is stopped, and the incomplete locking is eliminated. Further, in the present invention, since the rotation range of the top plate can be easily changed by changing the length of the guide groove 13 of the operation lever, the design can be easily changed. More specifically, there is an advantage that the rotation range can be freely changed only by replacing the operation lever, and the fixed posture position of the top plate can be changed.

[Brief description of the drawings]

FIG. 1 is a rear view of a used state of a table according to an embodiment of the present invention, which is partially cut away.

FIG. 2 is a left side view of FIG.

FIG. 3 is an enlarged front view partially omitted.

FIG. 4 is a rear view of the partially omitted table shown in FIG. 3;

FIG. 5 is an enlarged left side view in the center longitudinal section of the table in a use state.

FIG. 6 is an enlarged right side view of a main part in a use state.

FIG. 7 is an enlarged right side view of a main part changed to an upright posture and put into a non-use state.

FIG. 8 is a side view illustrating the relationship between the operation lever and the lock pin.

FIG. 9 is an enlarged exploded perspective view of a main part.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Support 2 Top plate 5 Bracket 6 1st support shaft 7 Top support 10 Operating lever 11 2nd support shaft 12 Lock pin 13 Guide groove 13a Linear portion of guide groove 14 First locking part 15 Second engagement Stop 18 Shelf 20 Third spindle 23 Coil spring

──────────────────────────────────────────────────続 き Continuation of the front page (56) References Japanese Utility Model Sho 59-15325 (JP, U) Japanese Utility Model Sho 61-55835 (JP, U) Japanese Utility Model Sho 56-132944 (JP, U) (58) Field (Int.Cl. ⁶ , DB name) A47B 3/08

Claims (7)

(57) [Claims] 1. A top plate is rotatably supported on a first support shaft provided at an upper end of a support, and an operation lever is provided on a second support shaft provided at a required interval near the first support shaft. One end is rotatably supported along the lower surface of the top plate, and the other operation free end is exposed to the lower surface of the rear edge of the top plate. A guide groove having a first locking portion and a second locking portion is formed at both ends along the guide groove, and a lock pin implanted in the top plate is slid into the guide groove so that the top plate is in a horizontal posture. At one time, the lock pin is engaged with the first locking portion of the guide groove and held horizontally, and when the top plate is in the upright posture, the lock pin is engaged with the second locking portion of the guide groove. While holding the operating lever in the upright position, the rocking operation is performed by swinging the free end of the operating lever below the rear edge of the top plate. A table characterized in that the engagement of the cup pin is released, the lock pin is guided in the guide groove, and is freely moved to the other locking portion, thereby enabling the top plate to rotate. 2. A bracket according to claim 1, wherein a bracket is provided at an upper end of the column, and first and second support shafts are respectively implanted on the bracket, and a top plate is provided on a lower surface of the top plate along a front-rear direction. And a lock pin is implanted in the top support to slide into a guide groove of an operation lever for bearing on the second support shaft. A table characterized by being arranged side by side in the front-rear direction along a top plate receiver. 3. The control groove according to claim 1, wherein the guide groove formed in the operation lever has a linear length along the length direction of the operation lever and has an upward bent portion at both ends thereof. 1, a table provided with a second locking portion. 4. The table according to claim 1, wherein a free end of the operation lever is extended to a position near a rear edge of the top plate, and an operation knob 10a is provided at the free end. 5. The first or second locking portion according to claim 1, wherein a spring is contracted between the top plate and the operation lever to constantly urge the free end of the operation lever downward. A table characterized by holding engagement of a lock pin to be inserted. 6. The method according to claim 1, wherein a third support shaft is provided at an upper end of the support, a front end of the shelf frame is supported on the support shaft, and a hanging rod is passed between the top plate and the shelf frame. A table, wherein the shelf frame is supported so as to rotate from a horizontal posture to a standing posture with the third support shaft as a fulcrum in accordance with a rotational movement of a top plate. 7. The suspension rod according to claim 6, wherein the suspension rod is inserted through a guide frame provided halfway in the length of the operation lever, and one of the shaft ends pivotally connected to the guide frame and the top plate. A table in which a coiled spring is wound in a contracted state and the operation lever is constantly biased downward.