JPH038093Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] This invention relates to a folding device for the T-shaped legs in a table in which the T-shaped legs are provided at both left and right ends of the lower surface of the top plate.

[Conventional technology]

Conventionally, as shown in Japanese Utility Model Publication No. 59-38896, a pair of left and right legs, in which the front and rear leg rods are integrated by a connecting rod, is placed in an open position perpendicular to the top plate and in a closed position parallel to the top plate. Tables are commonly used that can be rotated between positions, held in both open and closed positions, and made compact by folding the left and right legs into the closed position when not in use. Moreover, devices with various configurations are used as folding devices for the left and right legs of such a table.

On the other hand, there is also a table that has T-shaped legs attached to both the left and right ends of the bottom surface of the top plate, each of which has legs that extend forward and backward at the bottom end of a single leg rod.
Commonly used.

[Problem that the invention attempts to solve]

In a table equipped with T-shaped legs as described above, if the above-mentioned leg folding device in which the front and rear leg rods are integrated with a connecting rod is provided as a folding device for these T-shaped legs, the leg rods can be folded. Since the number is halved, most parts can be halved, reducing the number of parts and the number of assembly steps. but,
When the load of the top plate and the items placed on the top plate are the same, the load on the leg rods of the T-shaped legs is doubled, which requires greater strength from each part of the folding device. There has been a problem in that it is difficult to apply a leg folding device having front and rear leg levers to a T-shaped leg folding device due to the material and shape of the leg rods.

This invention solves the problems mentioned above, has high strength in each part, can be used for a long period of time with almost no failure or damage even if the leg lever receives a large load, and furthermore, the leg lever can be used in both open and closed positions. To provide a T-leg folding device for a table that can be held securely without rattling.

[Means for solving problems]

The T-leg folding device for a table according to this invention has circuit boards fixed to the left and right ends of the lower surface of the top plate, pivot shafts installed on protrusions projecting downward from the front and rear edges of these boards, The upper ends of the leg rods of the T-shaped legs are rotatably fitted and supported on these pivot shafts, and locking pins protruding from the outer periphery of the front and rear end surfaces of the upper ends are attached to the top plate. The top plate provided on the protrusion is engaged with a cam provided on the protrusion of the board so that it can be locked in the open position at right angles to the open position and the closed position parallel to the open position, and can be moved between the open and closed positions. The front and rear ends of the lock member are slidably engaged and supported in the long engagement holes, and a lock spring that biases the lock member toward the upper end of the leg lever is stretched between the bottom surface of the top plate and the lock member. A protrusion with a locking part is provided on the outer periphery of the upper end of the leg rod, and the protrusion has a locking part that is locked with the locking member in both the open and closed positions of the leg rod, and a lock release lever is further provided on the pivot shaft, the tip of which engages with the locking member. It is rotatably fitted and supported.

[Effect]

The T-leg folding device according to this invention has a locking member attached to the protrusion at the upper end of the T-leg when the leg rod of the T-leg is in the open position in the open position and in the closed position when not in use. At the same time, the locking pin provided at the upper end of the leg lever is locked to the locking portion provided on the protrusion of the board, so that the portion that locks the leg rod is connected to the locking pin. The member is arranged on both sides of the left and right sides of the pivot shaft which is rotatably fitted to the upper end of the leg lever, and there are two locations at the front and two at the rear, and the lock spring is connected to the lock member and the base plate fixed to the top plate. It is possible to make the locking springs stronger by using multiple locking springs, and to make the members that are subjected to force such as the upper end of the leg rod, the cam of the board, and the locking member strong. This allows the leg rods to be securely held on the board without rattling, regardless of whether they are in the open position perpendicular to the top plate or the closed position parallel to the top plate, and is almost free from failure over a long period of time. Can be used without damage.

〔Example〕

An embodiment of this invention will be described below with reference to the drawings.

In FIGS. 1 to 3, reference numeral 1 denotes a top plate of a table formed into a substantially rectangular shape, and a frame body 2 made of a square pipe is fixed to the outer periphery of the lower surface of the top plate 1.
A reinforcing member 3 consisting of a square pipe whose front and rear ends are fixed is disposed between the square pipes constituting the long side 2a at both the left and right ends of the frame body 2, and at each corner of the frame body 2. A corner fitting 4 fixed to the top plate 1 is inserted.
T-shaped legs 5 are attached to the left and right ends of the top plate 1 so as to be openable and closable by a folding device 6, which will be described later. In the T-shaped leg 5, a leg part 8 made of a round pipe is fixed to the lower end of a leg rod 7 made of a pipe with an oval cross section, and the leg part 8 is arranged so as to extend in the front and rear directions of the top plate 1. A mounting pipe 9 made of a round pipe is fixed to the upper end of the rod 7.

As shown in FIGS. 3 to 7, the folding device 6 has a substrate 10 fixed to the center of the left and right ends of the lower surface of the top plate 1 in the front and rear directions. The substrate 10 is made of a bent steel plate, and has a protrusion 10b protruding from the front and lower rear edge of the upper base 10a.
The protrusions 10c and 10d provided on the left and right ends of b are engaged with the holes 2c on the short side 2b of the frame 2 and the holes 3a formed in the reinforcing member 3, and are positioned, and the upper base 10a is fixed to the top with wood screws or the like. It is fixed to plate 1. A pivot shaft 11 is installed horizontally on the protrusion 10b of the base plate 10, and the upper end of the leg rod 7 of the T-shaped leg 5 is rotatably fitted and supported on the pivot shaft 11. That is, the upper end plate 12 is attached to both end surfaces of the mounting pipe 9 fixed to the upper end of the leg rod 7.
is fixed, and the upper end plate 12 is fitted and supported concentrically on a pivot shaft 11 passing through the mounting pipe 9. A cam plate 13 which also serves as a reinforcing plate is welded and fixed to the opposite surface of the protruding part 10b of the base plate 10. A cam 14 is formed by the protruding part 10b and the cam plate 13. A locking pin 15 protruding parallel to the pivot shaft 11 is slidably engaged and supported on the cam 14, and locking portions 14a and 14b are provided at both ends of the cam 14. It is locked in the open position perpendicular to the plate 1, and the leg rod 7 is folded and locked in the closed position parallel to the top plate 1 at the locking part 14a, and in the folded state, the T-shaped leg 5 is locked in the frame. It is configured so that the corner fittings 4 provided on the body 2 do not protrude to the side opposite to the top plate 1. The top plate 1 is attached to the protrusion 10b of the substrate 10.
Engagement holes 10e that are long in the left and right directions are formed horizontally, and the engagement holes 10e are arranged on the opposite side of the cam 14 with respect to the pivot shaft 11. The front and rear ends of a lock member 16 are engaged and supported in the engagement hole 10e so as to be slidable in the left and right directions. The lock member 16 has a front
A rear retaining spring pin 17 is fitted and protruded to the side opposite to the top plate 1, and a spring hanging pin 18 is fixed to the top plate 1 side, and the spring hanging pin 18 and the board 1 are fixed to the side opposite to the top plate 1.
One end and the other end of a plurality of lock springs 19 made of coil springs are hung on a spring hook protrusion 10f which is cut and raised from the upper base 10a of 0. The upper end plate 12 is biased in the outer circumferential direction. A projection 12c having locking portions 12a and 12b at both ends is formed protrudingly on the outer periphery of the upper end plate 12, and the locking portion 12a of the projection 12c is connected to the leg rod 7.
in the open position, the locking part 12b is in the closed position of the leg rod 7,
The locking portions 12a and 12b are respectively locked on the lower surface of the locking member 16, that is, the surface opposite to the top plate 1.
The part in between is formed in an arc shape centered on the pivot shaft 11. Furthermore, both ends of the pivot shaft 11 are rotatably fitted and supported on both sides of a lock release lever 20 which is substantially U-shaped in plan.
0a is arranged so as to be able to engage with the pivot shaft 11 side of the lock member 16, and there is a certain degree of friction between both sides of the lever 20, the pivot shaft 11, the head 11a, and the cap nut 22 when the lever 20 rotates. A plastic seat plate 23 is inserted to provide resistance, and a synthetic resin tube 21 is attached to the intermediate portion of the lever 20. Note that the folding device 6 configured as described above
are provided symmetrically on the left and right ends of the top plate 1, respectively. In addition, the upper end plate 12, the cam plate 13,
The lock plates 16 are each made of a thick steel plate of about 5 to 6 mm.

In the embodiment configured as described above, when the table is used, the T-shaped legs 5 are attached as shown in FIG.
The leg rods 7 are held in an open position extending downward at right angles to the top plate 1. That is, the locking pin 15 provided on the upper end plate 12 of the leg rod 7 is locked with one of the locking portions 14a of the cam 14 provided on the base plate 10, and the locking member 16 biased by the locking spring 19 is activated. Then, one of the locking portions 12a of the upper end plate 12 is locked,
Since the locking pin 15 and the locking member 16 are arranged on both sides of the pivot shaft 11 in the left and right directions, the locking member 16 is a locking spring 19 made up of a plurality of coil springs.
This combined with the fact that the leg rods 7 can be firmly held on the base plate 10 without wobbling, and the strength of the upper end plate 12, cam plate 13, and lock plate 16 is high, so that the Board 1 and top board 1
Can withstand heavy loads from items above.

In this state of use, lift the table slightly or turn it upside down, press the lock release lever 20, rotate it around the pivot shaft 11, and
At 0a, the locking member 16 is moved against the locking spring 19 to release the locking portion 12a of the upper end plate 12 by the locking member 16, and the leg rod 7 is moved to the pivot shaft 11.
The lever 20 is rotated until it reaches a closed position parallel to the lower surface of the top plate 1, and then the lever 20 is pushed and released. As a result, the lock member 16 returns to its previous position due to the restoring force of the lock spring 19, and the seventh
As shown in the figure, the other locking portion 12b of the upper end plate 12
is locked, and the locking pin 15 is locked by the other locking portion 14b of the cam 14, resulting in an unused state. Even in this state, the leg rods 7 can be held securely in the same way as in the above-mentioned use state, and the tables can be stacked in a plurality of upper and lower stages.

Furthermore, to change from unused state to used state,
By rotating the leg rod 7 in the opening direction while pushing the lever 20, and then releasing the push of the lever 20,
It can be put into the usage state described above.

[Effect of idea]

As explained above, according to this invention, the locking member provided on the protrusion at the upper end of the leg lever can be used both when the leg lever is in the open position and when it is not in use when it is folded to the closed position. While locking the locking part,
A locking pin provided at the upper end of the leg rod is locked to a locking portion provided on a protrusion of the board, and the portion that locks the leg rod is such that the locking pin and the lock member can rotate the upper end of the leg rod. They are placed on both sides of the pivot shaft that is fitted into the top plate, and there are two on the front and two on the back.Furthermore, the lock springs are strung between the lock member and the base plate fixed to the top plate, so it is strong enough to have multiple springs. By making it possible to increase the strength of the members on which force is applied, such as the upper end of the leg lever, the cam of the base plate, and the locking member,
In both the open position where the leg rod is perpendicular to the top plate and the closed position where it is parallel to the top plate, the leg rod can be securely held on the board without rattling, and the strength of the component parts is increased so that there is almost no failure over a long period of time. This has the effect of providing a T-leg folding device that can be used without damage.

[Brief explanation of drawings]

1 and 2 are a schematic front view and a schematic bottom view of a table equipped with a T-shaped leg folding device according to an embodiment of the invention, FIG. 3 is an exploded perspective view of the table as seen from the bottom side, and FIG. 4 5 is a front view and a bottom view of a T-shaped leg folding device according to an embodiment of this invention, FIG. 6 is an exploded perspective view of the main parts of the device seen from the bottom side, and FIG. 7 is an illustration for explaining the operation. It is a front view with a part cut away. 1...Top plate, 2...Frame, 4...Corner fittings, 5...
...T-leg, 6... Folding device, 7... Leg rod, 9...
...Mounting pipe, 10... Board, 10a... Upper bottom,
10b...protrusion, 10e...engaging hole, 10f...
...Spring hanging protrusion, 11...Pivot shaft, 12...Upper end plate, 12a, 12b...Locking portion, 12c...Protrusion, 13...Cam plate, 14...Cam, 14a, 1
4b...Locking portion, 15...Latching pin, 16...Lock member, 18...Spring hanging pin, 19...Lock spring, 20...Lock release lever, 20a...
tip.

Claims (1)

[Scope of utility model registration request] Boards are fixed to the left and right ends of the lower surface of the top plate, and pivot shafts are installed on the protrusions that protrude below the front and rear edges of these boards, and the upper ends of the leg rods of the T-shaped legs are attached to these pivot shafts. The locking pins, which are rotatably fitted and supported, and protrude from the outer periphery of the front and rear end surfaces of the upper end are locked in the open position where the leg rod is perpendicular to the top plate and in the closed position parallel to the top plate. The front and rear ends of the locking member are engaged with cams provided on the protrusion of the board so as to be movable between the open and closed positions. A lock spring that biases the lock member toward the upper end of the leg rod is stretched between the bottom surface of the top plate and the lock member, and the outer periphery of the upper end of the leg lever is attached to both the opening and closing sides of the leg lever. The invention is characterized in that a protrusion with a locking portion is provided to be locked to the lock member at a certain position, and a lock release lever whose tip end engages with the lock member is rotatably fitted and supported on the pivot shaft. Folding device for the T-legs of the table.