JPH1075824A - Lock mechanism for folding table - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lock mechanism which achieves safety in application with a simple structure while facilitating adaptation to any modification of the existing mechanism. SOLUTION: In this lock mechanism for a folding table, a leg 5 is rotatably linked right below a top board 1 and each one end of folding links 7 and 9 is rotatably mounted right below the leg 5 and the top board 1 while other ends thereof 7 and 9 are linked rotatably. A retaining rod 10 is provided at one of the folding links 7 and 9. One end part of a lock link 13 is rotatably mounted right below the top board 1 while the other end part of the lock link 13 is allowed to be engaged with the retaining rod 10.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a locking mechanism for a folding table, which can be used safely with a simple structure and can be easily adapted to modifications of an existing mechanism.

[0002]

2. Description of the Related Art A conventional folding table is provided with a lock mechanism for preventing a leg or a top plate from being accidentally folded during use. For example, in Japanese Utility Model Laid-Open No. 5-11832,
An upper joint member is provided at an upper end of a supporting leg for supporting the top plate, an upper and lower engaging portion is provided at an upper and lower position of the member, and the top plate is foldably connected to the upper joint member via a lower frame.

Further, an arm is rotatably provided on the lower frame, the arm is urged to be rotatable downward, an operation lever is connected to the pivot of the arm, and a pin is protruded from the tip of the arm. The pin is provided so as to be selectively engageable with the upper and lower engaging portions.

When the top plate is used, the operation lever is rotated, and the pin is engaged from the lower engagement portion to the upper engagement portion to fold the top plate. When the top plate is used, the pin is moved from the upper engagement portion. The lower engaging portion is engaged.

However, this lock mechanism has a problem that if a finger accidentally touches the operation lever during use of the table, the pin is disengaged from the lower engagement portion and becomes unstable, thereby impairing safety in use. there were.

[0006]

DISCLOSURE OF THE INVENTION The present invention solves such a problem and can secure the safety at the time of use with a simple configuration, and can also easily lock the folding table so as to easily adapt the existing mechanism. The purpose is to provide a mechanism.

[0007]

According to the present invention, a leg is rotatably connected directly below a top plate, and one end of a folding link is rotated between the leg and directly below the top plate. A folding table in which the other end of the link is rotatably connected and a locking rod is provided on one of the folding links, and one end of the lock link is rotated just below the top plate. And the other end of the link can be engaged with the locking rod to prevent accidental folding of the leg during use with a simple configuration, improve the safety in use, and improve the existing mechanism. In order to easily respond to modifications. The invention of claim 2 is
A folding table in which a leg is rotatably connected directly below a top plate, one end of a folding link is rotatably mounted on the leg and directly below the top plate, and the other end of the link is rotatably connected. A swing link having a locking rod protruding from one of the folding links, rotatably connected thereto, a plurality of shelf bars connected to the rod, and one end of a lock link directly below the top plate. Part is rotatably mounted, and the other end of the link is engageable with the locking rod, thereby preventing a leg and a shelf from being accidentally folded when using a table having a foldable shelf immediately below the top plate. And improve safety in use. According to the third aspect of the present invention, when the table is not used, the lock link is brought into close contact with the lower surface of the top plate to realize compact folding, and when the table is used, the lock link is disposed substantially at right angles to the folding link. It effectively counters the folding displacement of the tatami link to prevent accidental folding of the legs during use.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to the drawings. In FIGS. 1 to 4, reference numeral 1 denotes a horizontally long rectangular top plate, and a pair of reinforcing frames 2 are fixed in parallel on the back surface thereof. A bracket 3 having a substantially U-shaped cross section is fixed to both ends of the frame 2.

The lower end of the bracket 3 projects below the reinforcing frame 2, and the upper end of a leg 5 is connected to this projection via a pin 4 so as to be foldable inward. One end of a folding link 7, 7 is rotatably connected to an upper portion of the leg 5 via a pin 6, 6, and the link 7, 7 is disposed inside the leg 5, 5 so as to face the leg. The other ends thereof are rotatably and hookably connected to the inside of one end of the folding link 9 via pins 8.

The folding links 9, 9 are formed in a substantially U-shaped cross section, and a large-diameter locking rod 10 is fixed between their one ends, and the other ends of the links 9, 9 are connected via pins 11. , And are rotatably connected to the reinforcing frame 2. In this case, the locking rod 10 may be provided between the other folding links 7.

Locking members 12 are fixed to the rear surfaces of both ends of the top plate 1, and one end of a lock link 13 is supported by the metal members 12 so as to be vertically rotatable. The lock link 13 is formed by bending a steel rod into a substantially U-shape as shown in FIG.
At one end thereof, mounting portions 14, 14 which can be inserted into the latch 12.
And an engaging portion 15 bent at a substantially right angle is formed at the other end so that the engaging portion 15 can be engaged with the locking rod 10.

The lock link 13 engages with the locking rod 10 when the leg 5 is folded and comes into close contact with the back surface of the top plate 1 as shown in FIG. And are positioned substantially perpendicular to the folding links 7, 9 and obliquely upward as shown in FIG.

The locking mechanism of the folding table constructed as described above fixes the locking rod 10 between the folding links 9 and 9 and attaches the latch 12 to the back surface of the top plate 1.
One end of the lock link 13 may be rotatably attached to 2, and the other end may be attached to be able to engage with the locking rod 10.

As described above, the present invention has a small number of new components and its structure is simple, so that it is easy to manufacture and easily adapts to the modification of an existing mechanism having a pair of folding links 7 and 9.

The table on which the lock mechanism is assembled is as follows:
When not in use, the legs 5 are folded inward about the pins 4, which overlap with the reinforcing frame 2 and are positioned in parallel. This situation is as shown in FIG. 1, where the folding links 7, 9 are folded,
The folding link 9 is positioned substantially parallel to the reinforcing frame 2, and the periphery of the mounting portion 14 of the lock link 13 and the engaging portion 15 are in close contact with the back surface of the top plate 1, thereby making the folded state compact.

When the table is used in such a situation, for example, the table is held sideways on the floor, and the legs 5, 5 are bent outward with the pins 4, 4 as fulcrums. 5
Is engaged with the inner surface of the bracket 3.

In this manner, the legs 5 stand up, and the folding links 7, 9 are pulled by the legs 5 so that they are connected to the reinforcing frame 2.
And the legs 5 are extended substantially linearly, and at the same time, their upper ends are engaged to form a brace-like erection state. Then, the assembled state of the legs 5 and 5 is maintained.

Thereafter, when the table is erected on the floor,
The lock link 13 pivots downward about the mounting portion 14 by the gravitational action, the engagement portion 15 at the lower end thereof engages with the upper surface of the locking rod 10, and the lock link 13 is substantially perpendicular to the folding link 9. Stand up. This situation is as shown in FIG.

Therefore, even if the limbs contact the folding links 7 and 9 when the table is used, for example, and try to press and bend them upward with the pin 8 as the center, the engaging portion 15 of the locking link 13 is locked by the locking rod 10. And the upper end of the folding link 7 engages with the inner surface of the folding link 10 to prevent the folding links 7 and 9 from being pushed and bent, thereby preventing the legs 5 and 5 from being folded. Therefore, safety in use can be achieved.

Next, when the use of the table is completed and the legs 5 and 5 are folded for transportation or storage, for example, the table is placed horizontally on the floor and held, and the lock link 13 is held.
Is pulled down to the top 1 side, the link 13 is turned clockwise in FIG. 2 around the mounting portion 14 as a fulcrum, and the engaging portion 15 is positioned on the back surface of the top 1, and the legs 5, 5 are connected to the pins 4. Bend inward at the fulcrum.

In this manner, the folding links 7, 7 rotate clockwise in FIG. 2 around the pins 6, 6, and the folding links 9, 9 are pulled by the links 7, 7, and The links 9, 9 rotate around the pins 11, 11 in the counterclockwise direction in FIG.

Then, the legs 5, 5 are folded in parallel with the reinforcing frame 2, the folding links 7, 7 rotate at the maximum angle, and the folding links 7, 7 move substantially in parallel with the reinforcing frame 2, When the locking rod 10 is engaged with the lock link 13, a series of folding operations is completed to form the state shown in FIG.

FIGS. 5 and 6 show another embodiment of the present invention, and the same reference numerals are used for components corresponding to those of the above-described embodiment. In this embodiment, instead of providing the folding rod 9 with the locking rod 10, the folding link 9 and the swing link 16 are rotatably connected to the inside and outside positions of the pins 8, 8, and one end of the link 16 A hooking projection 17 engageable with the folding link 7 is provided, a locking rod 10 is rotatably installed between the other ends, and a plurality of shelf bars 18 forming a shelf between the rods 10, 10. Is fixed.

When the table is not used, the legs 5, 5
And the folding links 7 and 10 are folded, and the latching projections 17 of the swinging links 16 are located below to release the engagement with the folding links 7, while the locking rod 10 is in the uppermost position. The storage space on the shelf bar 18 is narrow.

When the table is used in such a situation, for example, the table is held sideways on the floor, and the legs 5, 5 are bent outward with the pins 4, 4 as fulcrums. 5
Is engaged with the inner surface of the bracket 3.

In this manner, the legs 5 stand up, and the folding links 7, 9 are pulled by the legs 5 so that they are connected to the reinforcing frame 2.
And the legs 5 are extended substantially linearly, and the upper ends of the folding links 7 and 9 are engaged to form a brace-like erection state.

At this time, the swing link 16 is connected to the folding link 7,
9, the locking rod 10 and the shelf bar 18 move to the lowermost position, while rotating away from the top plate 1, and the top plate 1
When a predetermined storage space has been formed between
The latching projection 17 engages with the folding link 7 and stops its operation.

Thereafter, when the table is erected on the floor,
The lock link 13 pivots downward about the mounting portion 14 by the gravitational action, and the engagement portion 15 at the lower end thereof engages with the upper surface of the locking rod 10, and the lock link 13 is substantially moved with respect to the folding link 9. This situation standing at right angles is as shown in FIG.

Therefore, for example, when the limbs contact the shelf bar 18 when using the table and try to push up the bar 18 and the folding links 7 and 9 associated therewith, the engaging portion 15 of the lock link 13 is locked. The folding link 7 engages with the rod 10 and the upper end of the folding link 7 engages with the inner surface of the folding link 10 to prevent the folding links 7 and 9 from being pushed and bent. Prevent folding. As a result, scattering of the top plate 1 and the contents on the shelf can be prevented, and safety in use can be achieved.

Next, when the use of the table is completed and the legs 5 and 5 are folded for transportation or storage, for example, the table is placed horizontally on the floor and held, and the lock link 13 is held.
Is pulled down to the top plate 1 side, the link 13 is turned clockwise in FIG. 6 with the mounting portion 14 as a fulcrum, and the engaging portion 15 is positioned on the back surface of the top plate 1. Bend inward at the fulcrum.

In this manner, the folding links 7, 7 rotate clockwise in FIG. 6 around the pins 6, 6, and the folding links 9, 9 are pulled by the links 7, 7, and The links 9, 9 rotate around the pins 11, 11 in the counterclockwise direction in FIG.

When the legs 5, 5 are folded in parallel with the reinforcing frame 2, the folding links 7, 7 rotate at the maximum angle, and the folding links 7, 7 move substantially in parallel with the reinforcing frame 2. , A series of folding operations is completed, and the state shown in FIG. 8 is formed.

As described above, in the present embodiment, the present invention is applied to a folding table provided with a foldable shelf directly below the top plate 1.

[0034]

As described above, according to the first aspect of the present invention, a locking rod is provided on one of the folding links, and one end of the locking link is rotatably mounted directly below the top plate, and Since the other end can be engaged with the locking rod, the leg can be prevented from being accidentally folded at the time of use with a simple structure, safety in use can be achieved, and the existing mechanism can be easily modified. effective. According to a second aspect of the present invention, a swing link having a locking rod projecting from one of the folding links is rotatably connected, a plurality of shelf bars are connected to the rod, and a lock link is provided immediately below the top plate. Since one end of the link is rotatably mounted, and the other end of the link is engageable with the locking rod,
When using a table having a foldable shelf directly below a top plate, it is possible to prevent a leg and a shelf from being accidentally folded at the time of use, and to ensure safety in use. According to the third aspect of the present invention, when the table is not used, the lock link is in close contact with the lower surface of the top plate, so that a compact folded state can be realized. When the table is used, the lock link is substantially perpendicular to the folding link. , It is possible to effectively prevent the folding displacement of the folding link and prevent the leg from being accidentally folded.

[Brief description of the drawings]

FIG. 1 is a front view showing a first embodiment of the present invention, showing a folded state of a leg when a table is not used.

FIG. 2 is a front view showing an operation state of the first embodiment, and shows a lock state of a lock mechanism when the table is used.

FIG. 3 is a perspective view showing a lock link applied to the first embodiment.

FIG. 4 is a bottom view of FIG. 2;

FIG. 5 is a front view showing a second embodiment of the present invention, and shows a folded state of the legs when the table is not used.

FIG. 6 is a front view showing an operation state of the second embodiment, and shows a lock state of a lock mechanism when a table is used.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Top plate 5 Leg 7,9 Folding link 10 Locking rod 13 Lock link 16 Swing link 18 Shelf

Claims (3)

[Claims] 1. A leg is rotatably connected directly below a top plate, and one end of a folding link is rotatably mounted on the leg and directly below the top plate, and the other end of the link is rotatable. A locking table provided on one of the folding links, one end of the lock link being rotatably mounted directly below the top plate, and the other end of the link being connected to the link. Locking mechanism for the folding table that can be engaged with the stop rod. 2. A leg is rotatably connected directly below the top plate, one end of a folding link is rotatably mounted on the leg and directly below the top plate, and the other end of the link is rotatable. A pivotable link having a locking rod protruding from one of the folding links is rotatably connected, and a plurality of shelf bars are connected to the rod, and the folding table is directly below the top plate. A lock mechanism for a folding table, wherein one end of a lock link is rotatably mounted on the lock table, and the other end of the link is engageable with the locking rod. 3. The lock link according to claim 1, wherein the lock link is in close contact with the lower surface of the top plate when the table is not used, and the lock link is arranged substantially perpendicular to the folding link when the table is used.
A locking mechanism for the folding table as described.