JP2003024142A - Locking device for supporting leg in table - Google Patents

Abstract

PROBLEM TO BE SOLVED: To automatically lock the raised state of a supporting leg by raising the supporting leg in a table having a foldable supporting leg in the top. SOLUTION: A supporting leg 4 is raisably provided to the underside of a top 1 and a supporting leg holding member 5 is provided rotatably by a supporting shaft 7. A guide hole 8 and an engagement pin 6 an engagement hole 8a bent from the hole 8 are provided in the supporting leg holding member 5. The supporting leg 4 is provided with a guide hole 8 sliding in the engagement hole 8a. The supporting leg holding member 5 is provided with a spring material 10. When the supporting leg 4 is raised from the laid state. The engagement pin 6 slides in the guide hole 8, guided to the engagement hole 8a by a spring material 10, and when the engagement pin 6 is fitted into the engagement hole 8a, the spring material 10 holds the fitted state by an elastic force and locks.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a locking device for supporting legs of a table.

[0002]

2. Description of the Related Art Conventionally, in a table such as a conference table, as a device that folds the supporting legs to the lower surface of the top plate when not in use and stands up when in use to lock the standing state, for example, the supporting legs to the lower surface of the top plate. Prepare for ups and downs,
At the time of use, after the supporting leg is manually raised, the tip of the latch that is rotatably provided on the lower surface of the top plate is manually locked to the supporting leg to hold (lock) the standing state of the supporting leg. There is something.

[0003]

As in the prior art, it is troublesome to lock the latches on the support legs one by one as an operation for locking the standing state of the support legs, and there is a problem that the latches may be forgotten.

Therefore, an object of the present invention is to provide a lock device in which the standing state is automatically locked by the operation of standing the supporting leg.

[0005]

In order to solve the above-mentioned problems, a first aspect of the present invention is to provide a supporting leg at a lower portion of a top plate of a table so that the supporting leg can be raised and lowered by a horizontal first supporting shaft. Further, a support leg holding member is arranged below the top plate of the table in the up and down direction of the support leg and is rotated by a horizontal second support shaft provided at a position in the fall direction of the support leg rather than the first support shaft of the support leg. In order to be possible, the support leg is provided with a locking pin located below the first support shaft, and the support leg holding member is formed with an elongated hole-shaped guide hole along the up and down direction of the support leg. A series of locking holes bent upward are formed at an end of the guide hole on the side opposite to the second support shaft, and the locking pin is slidably fitted in the guide hole to tilt the supporting leg. When operating, the locking pin slides in the guide hole, and when the supporting leg stands up, the locking pin fits into the locking hole. To hold the upright state of the supporting leg, and further to guide the locking pin into the locking hole and to fit the locking hole when the supporting leg holding member is raised from the fall state to the upright state. It is characterized in that a spring member for elastically holding the fitted locking pin is provided.

According to a second aspect of the present invention, in the first aspect of the present invention, a guide portion in which the spring member is arranged in a transverse direction of the guide hole at a position of an end portion of the guide hole, and a locking hole. It is formed by providing a holding portion that elastically presses the locking pin fitted to the inside of the locking hole.

In the above invention, when the supporting leg is raised from the state in which the supporting leg and the supporting leg holding member are laid down on the lower part of the top plate, the locking pin provided on the supporting leg slides in the guide hole of the supporting leg holding member, The supporting leg holding member rotates downward.

When the support leg reaches immediately before standing up, the locking pin abuts the spring member and is guided to the locking hole of the supporting leg holding member, and when the supporting leg stands up, the locking pin fits into the locking hole. Then, this fitted state is elastically held by the spring material. Therefore, the standing state of the supporting leg is automatically locked only by the operation of raising the supporting leg.

Next, from the standing state of the supporting leg, the supporting leg holding member is slightly moved upward against the spring force of the spring member to move the locking pin from the locking hole to the guide hole, and then the supporting leg. When is rotated in the fall direction, the locking pin moves in the guide hole, and the supporting leg and the supporting leg holding member fall down, that is, are folded on the lower portion of the top plate.

According to a third aspect of the present invention, a supporting leg is provided at a lower portion of the top plate of the table so as to be able to be raised and lowered by a horizontal first support shaft, and a supporting leg holding member is further provided at a lower portion of the top plate of the table. It is arranged in the up-and-down direction of the support leg and is rotatably provided by a horizontal second support shaft provided at a position in the fall direction of the support leg rather than the first support shaft of the support leg. Is provided with a locking pin, the supporting leg holding member is formed with an elongated hole-shaped guide hole along the up-and-down direction of the supporting leg, and at the end of the guide hole opposite to the second supporting shaft. Is formed with a series of locking holes bent upwards, and the locking pins are slidably fitted in the guide holes. At the time of standing up, the locking pin fits into the locking hole so as to maintain the standing state of the supporting leg. The serial support leg holding member and is characterized in that a biasing means for biasing said supporting leg support member to the upright direction.

According to a fourth aspect of the present invention, in the third aspect, the urging means is formed by interposing a spring between the supporting leg holding member and the top plate.

According to a fifth aspect of the present invention, in the third aspect of the present invention, the biasing means comprises a torsion spring wound around the second support shaft, and one end of the torsion spring is attached to the lower surface of the top plate. And the other end is locked to the upper surface of the supporting leg holding member.

According to the third, fourth and fifth inventions, when the supporting leg is erected, the supporting leg holding member is urged in the erection direction by the urging means, so that the locking hole is moved to the locking pin. It automatically fits, and the standing state of the supporting leg is automatically locked.

The supporting leg is folded in the same manner as described above.

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described based on the embodiments shown in the drawings.

1 to 8 show a first embodiment of the present invention.

FIG. 1 is a front view of a conference table to which the present invention is applied. 1 is a top plate, 2 is a frame fitting fixed to the four corners of the lower surface of the top plate 1, and 4 is the frame fitting 2 described above. First spindle 3
Is a support leg that can be undulated by a support leg 5, a support leg holding member that holds the support leg 4 in an upright state, and 13 is a shelf.

The supporting leg holding member 5 and the lock mechanism provided therein will be described in detail with reference to FIGS. 2 to 8.

At the four corners of the lower surface of the top plate 1, frame fittings 2 having an inverted U-shaped cross section as shown in FIG. 3 are fixed by screws 2a so as to be disassembled. A supporting leg 4 is rotatably supported at the upper end of each frame fitting 2 by a horizontal first supporting shaft 3, and the supporting leg 4 is centered on the first supporting shaft 3.
It stands up as shown in FIG. 8 or falls down on the lower part of the top plate 1 as shown in FIG. In addition, the first support shaft 3
Is attached by a nut 3a. By removing the nut 3a and removing the first support shaft 3, the frame fitting 2 and the support leg 4 can be disassembled.

In the standing posture of the support leg 4,
A locking pin 6 is fixedly provided below the first support shaft 3 so as to project inward from the support leg 4. As shown in FIG. 3, the locking pin 6 has a base portion 6a and a head portion 6b having a large diameter, and an annular locking groove 6c having a small diameter is formed between them.

A support leg holding member 5 is arranged inside the frame fitting 2 in parallel with the frame fitting 2, that is, in the up-and-down direction of the support leg 4 and on the back side thereof, that is, the support leg. One end of the support leg 4 in the fall direction from the first support shaft 3 is rotatably connected to the frame fitting 2 by the horizontal second support shaft 7. The second support shaft 7 is attached by a nut 7a, and by removing the nut 7a and removing the second support shaft 7, the support leg holding member 5 can be disassembled from the frame fitting 2.

As described above, since the top plate 1, the frame fitting 2, the supporting leg 4, and the supporting leg holding fitting 5 can be disassembled, the table can be sorted when it is discarded, and environmental measures can be sufficiently taken.

The supporting leg holding member 5 is formed in a long shape so that the other end 5a, which is the front end, reaches the locking pin 6 portion of the supporting leg 4 in a standing state.

The outer wall 5b of the supporting leg holding member 5 has a structure shown in FIG.
A guide hole 8 is formed as shown in FIG. The guide hole 8 is formed as a long hole along the longitudinal direction of the support leg holding member 5, that is, in the up-and-down direction of the support leg 4, and at the tip of the guide hole 8, that is, the second support shaft of the support leg holding member 5. A locking hole 8a bent upward is formed continuously with the guide hole 8 on the side opposite to the hole 7. As shown in FIG. 2, the position of the engaging hole 8a is such that the engaging pin 6 fits into the engaging hole 8a when the supporting leg 4 is in the upright state, and the supporting leg holding member 5 is shown in FIG. It is set to incline. Further, the hole width d of the guide hole 8 and the locking hole 8a is smaller than the diameter of the base portion 6a and the head portion 6b of the locking pin 6, and is slidable in the locking groove 6c of the locking pin 6. It is set to fit dimensions.

Further, the inner side surface 8b of the engaging hole 8a is provided with the first support shaft 3 on the supporting leg 4 from the state shown in FIG. 2 in which the engaging pin 6 is fitted in the engaging hole 8a when the supporting leg 4 is upright. The locking pin 6 is locked to the inner side surface 8b of the locking hole 8a and suppresses the falling of the support leg 4 when a rotational force in the central fall direction, that is, in the direction of the arrow X in FIG. 2 is applied. Has been formed. Also,
The guide hole 8 and the locking hole 8a are continuous at the bent portion 8c.

Further, the locking hole 8 in the guide hole 8
A locking pin insertion hole 8d is continuously formed on the side opposite to a, and the inner diameter of the locking pin insertion hole 8d is formed to have a diameter through which the base portion 6a and the head portion 6b of the locking pin 6 are inserted. There is.

In order to fit the locking pin 6 into the guide hole 8, before the support leg holding member 5 is assembled by the second support shaft 7, first, from the locking pin insertion hole 8d of the support leg holding member 5. The locking pin 6 is inserted, and then the guide hole 8 of the supporting leg holding member 5 is fitted into the locking groove 6c of the locking pin 6 as shown in FIG. It is attached to the frame fitting 2 by the shaft 7.

A first rivet 9 is horizontally fixed inside the tip 5a side of the support leg holding member 5, that is, inside the tip side of the locking hole 8a, and the outer periphery of the first rivet 9 is fixed. A spring material 10 made of a coil spring is wound around. One end 10a of the spring member 10 is locked to the inner surface of the upper side 5c of the supporting leg holding member 5, and the other end projects toward the locking hole 8a to form an engaging spring portion 10b. The engagement spring portion 10b is
The first step portion 10c bent from the base portion toward the front portion, the second step portion 10d forming the holding portion, the third step portion forming the guiding portion
It includes a step portion 10e and a horizontal bent portion 10f that is horizontally bent inward from the third step portion 10e. In the state of FIG. 8 in which the locking pin 6 does not exist in the locking hole 8a, the third step 10e comes into contact with the second rivet 11 provided on the supporting leg holding member 5.
Is located in the guide hole 8 in the transverse direction, and the second step portion 10d of the head 6b of the locking pin 6 is in a state where the locking pin 6 is fitted in the locking hole 8a as shown in FIG. It is designed to be locked to the lower surface of the outer circumference.

In the state before the spring member 10 is assembled, the facing interval between the one end 10a and the engaging spring portion 10b is set to be narrower than that in the state shown in FIG. 8, and when the spring member 10 is assembled. , The end portion 10a and the engagement spring portion 10b are slightly widened, and the engagement spring 10 is formed as shown in FIG.
b is locked to the second rivet 11 and assembled. As a result, in the assembled state, the engagement spring portion 10b is always urged upward by the spring force.

The support leg holding members 5 are provided at the lower portions of the four corners of the top plate 1, respectively. They are connected by 12 and interlocked with each other so that they can be integrally tilted. Further, both support leg holding members 5 and 5 in the left-right direction (left-right direction in FIG. 1) of the top plate 1 are connected by a shelf 13. The connection between the supporting leg holding member 5 and the shelf 13 is such that elongated holes 14 are formed at both ends of the shelf side frame 13a as shown in FIG.
A pin 15 projecting from the supporting leg holding member 5 is slidably fitted, and a nut 16 is screwed and connected to the pin 15, so that the shelf 13 and the supporting leg holding member 5 can be disassembled. Supports environmental measures at the time of disposal.

Next, the operation of raising and lowering the supporting leg 4 will be described.

First, the lying state of the support leg 4 (folded state)
8 is in the state shown in FIG. 8, the locking pin 6 provided on the support leg 4 is located at the rear portion of the guide hole 8 in the support leg holding member 5, and the engaging spring portion 10b of the spring member 10 is attached upward by the spring force. Since it is urged, the first step portion 10c is in the upper moving position in contact with the lower surface of the second rivet 11, and the third step portion 10c
e is located inside the guide hole 8, that is, in the supporting leg holding member 5 so as to substantially cross the guide hole 8 from the upper side to the lower side, that is, at a portion where the locking pin 6 passes. Further, the tip of the third step 10e, that is, the fourth step 10f is located below the guide hole 8.

When the support leg 4 is to be erected from the lying state of the support leg 4, the support leg 4 is rotated about the first support shaft 3 in the arrow Y direction in FIG. The rotation of the support leg 4 moves the locking pin 6 to the lower left in FIG. By this movement, the locking pin 6 slides in the guide hole 8 of the support leg holding member 5 and the support leg holding member 5 is rotated about the second support shaft 7 in the Z direction of FIG. Then, when the locking pin 6 is positioned in the bent portion 8c of the guide hole 8, the head portion 6b of the locking pin 6 hits the third step portion 10e of the spring material 10 and pushes the engaging spring portion 10b outward. At the same time, the guide portion including the third step portion 10e guides the locking pin 6 in the direction of the engaging hole 8a.

When the supporting leg 4 is further rotated in the upright direction, the supporting leg holding member 5 is pushed downward about the second supporting shaft 7 by the spring force (returning force) of the second step portion 10d of the engaging spring portion 10b. The locking pin 6 is forcibly pushed into the locking hole 8a side. Then, when the support leg 4 is in the standing state shown in FIG. 2, the locking pin 6 is fitted into the locking hole 8a as shown in FIG. The step portion 10d comes into contact with the locking pin 6 and the locking spring portion 1
It is held elastically at 0b.

When the locking pin 6 is fitted in the locking hole 8a in this way, when a force is applied to the support leg 4 in the fall direction (direction of arrow X in FIG. 2), the locking pin 6 is engaged. Stop hole 8a
In contact with the inner side surface 8b of the support leg 4, the fall of the support leg 4 is suppressed, and the upright state of the support leg 4 is maintained.

Therefore, when the fulcrum 4 is erected, the erected state of the fulcrum 4 is automatically locked only by the step of erecting the fulcrum 4.

Next, when the support leg 4 is toppled from the standing state of the support leg 4, the support leg holding member 5 is manually operated in the state of FIG. 2 so that the tip portion 5a thereof is slightly raised. The locking pin 6 is moved to be positioned below the locking hole 8a, that is, in the bent portion 8c, and in this state, the support leg 4 is rotated about the first support shaft 3 in the arrow X direction in FIG. As a result, the locking pin 6 of the support leg 4 slides in the guide hole 8 of the support leg holding member 5, and the support leg 4 and the support leg holding member 5 lie down and are folded as shown in FIG.

In the above embodiment, the spring material 10 is formed of a coil spring made of a wire material, but the spring material 10 may be formed of a leaf spring instead of the wire material.

9 to 11 show a second embodiment of the present invention.

The second embodiment shows another embodiment of the lock mechanism portion in the first embodiment.

That is, without providing the spring material 10, the first rivet 9 and the second rivet 11 in the first embodiment, the support leg holding member 5 in the first embodiment is centered around the second support shaft 7. An urging means 10A for constantly urging in a direction of standing rotation, that is, downward from the top plate 1 is provided. Specifically, a coil spring is installed between the supporting leg holding member 5 and the top plate 1 by compression. The biasing means 10A is formed of a coil spring in the embodiment, but may be a leaf spring.

Since the other structure is the same as that of the first embodiment, the same parts and portions as those described above are designated by the same reference numerals and the description thereof will be omitted.

In the second embodiment, the support leg 4 is in the folded state as shown in FIG.

When the supporting leg 4 is erected from this folded state, the supporting leg holding member 5 is also erected similarly to the first embodiment. At this time, the urging force of the urging means 10A applies a turning force to the supporting leg holding member 5 in the upright direction.

Then, when the support leg 4 comes close to the standing state,
Since the supporting leg holding member 5 is forcibly urged downward by the urging force of the urging means 10A, the locking pin 6 passes through the bent portion 8c of the guide hole 8 and is locked in the locking hole 8a. The supporting leg holding member 5 is rotated so that the fitting is inserted.

Then, as shown in FIGS. 9 and 10, when the support leg 4 is upright, the locking pin 6 is engaged with the locking hole 8a to prevent the support leg 4 from falling down as in the first embodiment. Is
The standing state of the support leg 4 is locked.

From the standing state of the support leg 4 described above, the support leg 4 is
In the case of lying down, the supporting leg 4 is folded as in the first embodiment.

According to the second embodiment as well, similar to the first embodiment, the standing state of the support leg 4 is automatically locked by merely raising the support leg 4.

FIG. 12 shows a third embodiment of the present invention.

In the third embodiment, instead of the biasing means 10A made of the coil spring in the second embodiment, a biasing means 10B made of a torsion spring is wound around the outer periphery of the second support shaft 7, The urging force constantly urges the support leg holding member 5 in a direction in which the support leg holding member 5 is erected and rotated about the second support shaft 7. That is, one end 10h of the torsion spring forming the urging means 10B is locked to the lower surface of the top plate 1 and the other end 10i is locked to the upper surface of the supporting leg holding member 5, so that the supporting leg holding member 5 is always moved downward. I am biased.

Since the other structure is the same as that of the second embodiment, the same members and parts as those described above are designated by the same reference numerals and the description thereof will be omitted.

Also in the third embodiment, the same action and effect as those of the second embodiment can be exhibited.

The present invention can also be applied to tables other than the conference table shown in the embodiment.

[0054]

As described above, according to the present invention, since the standing state of the supporting leg is automatically locked only by the operation of raising the supporting leg from the lying state, the standing state of the supporting leg is increased as in the conventional case. The erection of the fulcrum can be easily performed as compared with the case where the state is locked by a manual operation other than the standing operation.

Furthermore, since the upright state of the supporting leg is automatically locked, it is not necessary to forget to lock the lock as in the conventional case.

[Brief description of drawings]

FIG. 1 is a front view of a table showing a first embodiment of the present invention.

FIG. 2 is a front sectional view showing an essential part of the present invention in the table shown in FIG.
-A line sectional view.

3 is a sectional view taken along line BB in FIG.

FIG. 4 is a sectional view taken along line CC in FIG.

5 is a cross-sectional view taken along the line DD in FIG.

FIG. 6 is a perspective view of a spring member according to an embodiment of the present invention.

FIG. 7 is a perspective view of the support leg holding member shown in FIG.

FIG. 8 is a front cross-sectional view in which the support leg and the support leg holding member are laid down from the state of FIG.

FIG. 9 shows a second embodiment of the present invention and is a sectional view of a portion similar to that of FIG.

10 is a cross-sectional view taken along the line EE in FIG.

FIG. 11 is a front sectional view in which the support leg and the support leg holding member are laid down from the state of FIG.

FIG. 12 shows a third embodiment of the present invention and is a sectional view of a portion similar to FIG.

[Explanation of symbols]

1 Top plate 2 frame fittings 3 First support shaft 4 support legs 5 Support leg holding member 6 Locking pin 7 Second support shaft 8 guide holes 8a Locking hole 10 Spring material 10A, 10B energizing means 10d holding part 10e guidance section

Claims (5)

[Claims] 1. A support leg is provided at a lower portion of a top plate of a table so as to be able to be raised and lowered by a horizontal first support shaft, and a support leg holding member is arranged at a lower portion of the top plate of the table in a raising and lowering direction of the support leg. It is rotatably provided by a horizontal second support shaft provided at a position of the support leg in the fall direction of the support leg with respect to the first support shaft, and the support leg is provided with a locking pin located below the first support shaft. An elongated hole-shaped guide hole is formed in the supporting leg holding member along the up-and-down direction of the supporting leg, and a locking hole bent upward is formed at an end of the guide hole opposite to the second supporting shaft. Formed in series, the locking pin is slidably fitted in the guide hole, the locking pin slides in the guide hole when the supporting leg is tilted, and the locking pin locks when the supporting leg stands up. The supporting legs are fitted in the holes to maintain the standing state of the supporting legs. When changing from a lying state to a standing state,
A support leg locking device for a table, characterized in that a spring member for guiding the locking pin to the locking hole and elastically holding the locking pin fitted in the locking hole is provided. 2. A guide portion in which the spring member is arranged in a transverse direction of the guide hole at a position of an end portion of the guide hole, and a lock pin fitted in the lock hole is elastically moved to the inner part of the lock hole. 2. A lock device for a supporting leg of a table according to claim 1, wherein the locking device is formed by providing a holding portion that presses it mechanically. 3. A support leg is provided on a lower portion of a top plate of the table so as to be able to be raised and lowered by a horizontal first support shaft, and a support leg holding member is arranged on a lower portion of the top plate of the table in a raising and lowering direction of the support leg. It is rotatably provided by a horizontal second support shaft provided at a position of the support leg in the fall direction of the support leg with respect to the first support shaft, and the support leg is provided with a locking pin located below the first support shaft. An elongated hole-shaped guide hole is formed in the supporting leg holding member along the up-and-down direction of the supporting leg, and a locking hole bent upward is formed at an end of the guide hole opposite to the second supporting shaft. Formed in series, the locking pin is slidably fitted in the guide hole, the locking pin slides in the guide hole when the supporting leg is tilted, and the locking pin locks when the supporting leg stands up. The supporting legs are fitted in the holes to maintain the standing state of the supporting legs. A lock device for a support leg of a table, characterized in that a biasing means for biasing the holding member in the standing direction is provided. 4. The lock device for a supporting leg in a table according to claim 3, wherein the biasing means is formed by interposing a spring between the supporting leg holding member and the top plate. 5. The urging means comprises a torsion spring wound around the second support shaft, one end of the torsion spring is locked to a lower surface of a top plate, and the other end is engaged with an upper surface of the supporting leg holding member. 4. A lock device for a supporting leg in a table according to claim 3, which is formed by being stopped.