JPS5938898Y2 - Folding and unfolding device for supporting legs on a table - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a folding and unfolding device for supporting legs in a table.

In other words, two bending stays are interposed between the freely rotatable supporting leg and the top plate side to allow the supporting leg to be folded and unfolded.In particular, when unfolding, the two links are ensured to be in a straight line. This creates a strong tension state, and even if an external force is applied to the two links that break, they can be restored to their fixed state. can support
To provide a device that can be easily expanded and folded, has a simple structure, and can be suitably implemented.

Next, the embodiment shown in the drawings will be described.

Figure 1 shows a side view of the table, and two supporting legs B are attached to each end of the long rectangular top plate A.
Both support frames 6 extending in the longitudinal direction are fixedly installed on the lower surfaces of both sides, and support metals 7 having a U-shaped plane are provided at both ends of the support frames 6.
The upper part of each support leg B is fixedly fixed, and the upper part of each support leg B is inserted into the lower part of each support member 7 whose inner and lower sides are open. It is pivotally attached to the metal plate 7 so as to be freely rotatable, and is installed so that each support leg B can be stored along the lower surface of the support frame 6 below the top plate A when folded.

One end of a first link C in the form of an elongated plate is rotatably pivoted to the inner surface of the middle part of each supporting leg B via a pin 1.
One end of a second link D in the form of an elongated plate longer than the first link C is visible on the inner surface of the middle part of the support frame 6 that is away from the end on the side of the support metal 7. The second link D is pivotally attached so that it can rotate freely around the collar 2a fitted to the pin 2 to be inserted, and the first link C is attached to the outer surface of the second link D near the other end. The other end of the second link D is rotatably connected via a pin 3, and a round bar-shaped protrusion 4 facing sideways is provided on the upper part of the outer surface of the portion of the second link D that is closer to the other end than the pin 3. Both links C,
A recess 5 into which the protrusion 4 can be fitted from above is formed with D in a straight line, and both supporting legs B correspond to both sides.

A connecting rod 13 for operation is connected between the other ends of the plan 2 links D and D connected to each other.

Further, a spring rod E is interposed between the lower surface side of the top plate A and each second link D, and the spring rod E is an extending rod 10 having a hook 10a at one end from the coil portion 9. The coil part 9 is fitted into the collar 2a between the support frame 6 and the second link D, and the extension rod 11 having a hook lla at the tip is formed on the other side. The hook 10a is inserted into and engaged with the hole 12 formed on the inner surface of the frame 6, and the hook lla is engaged with the upper edge of the second link D from above, and the second link D is held by the spring lever E. It is installed and configured to apply downward pressure.

Note that a spring rod similar to that described above may be interposed between the support leg B and the first link C so as to bias the first link C downward.

Therefore, when each supporting leg B is expanded vertically, the first
As shown in Figures 4 to 4, when the first link C and the second link D are in a straight line and the protrusion 4 is fitted into the fourth part 5, both links C and D cannot be bent downward any further, and the second link D is in a straight line. The supporting leg B is supported by the coiled spring lever E that can be wound around the shaft 2 with the two links D being pressed downward.

In this state, both links C and D are in a straight line and in a strong tension state, and even if an external force is applied and both links C and D are pushed upward to break, they will immediately recover due to the elastic force of the spring lever E. When folding each supporting leg B, which is to be folded, grasp the connecting rod 13 and push it upward, so that both links C and D are bent from the pin 3, and the supporting legs B are folded upward as shown in Fig. 6. As it is pushed up, the spring lever E
is elastically contracted, and both links C and D rotate around pins 1 and 2, and at the same time, support leg B rotates around pin 8, until the connecting rod 13 approaches the bottom surface of the top plate A. When lifted, the second link D
As soon as the supporting legs B are placed on the lower surface of the top plate A, the supporting legs B are folded on the lower surface of the support frame 6, and the other two supporting legs B can be similarly folded to store each supporting leg B.

In this state, the spring lever E presses the second link D downward, but since the first link C is laterally diagonal between the second link D and the supporting leg B, the supporting leg B maintains the retracted state. will be done.

Also, when deployed, if you hold the connecting rod 13 and pull it strongly downward, it will be expanded in the opposite state to the above, but at that time, the spring rod E
The deployment operation is facilitated by the elastic force of .

In this way, in the present invention, one end of the first link is pivotally connected via a pin to the upper part of the collapsible support leg whose upper part is pivoted to the bottom side of the top plate. A second link whose one end is pivotally connected via a pin and a portion closer to the other end of the second link is rotatably connected to the other end of the first link via a pin, and the second link is closer to the other end than the position of the pin. A protrusion is formed on the upper edge of the first link, and four parts that can be engaged with the protrusion are formed on the upper edge of the first link, and the protrusion and the recess are engaged and the two links are pressed downward so as to be in a straight line. A spring rod, which has a coil shape and whose tip is attached, is interposed between the supporting leg and the first link, and between the bottom side of the thick root and the second link, so when it is deployed, there are two links. is in a straight line and firmly stretched, and even if an external force is applied to the two links that break, the spring lever can restore the fixed state, causing the support leg to break and the table toppling over. The supporting legs can be well supported to prevent
It can be unfolded and folded easily, has a simple structure, is easy to manufacture, and can be suitably implemented.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, in which Fig. 1 is a side view of the entire table, Fig. 2 is an enlarged view of a part thereof, Fig. 3 is a view taken along line ll-1111 in Fig. 2, and Fig. 4. is I in Figure 3
A perspective view along the V-IV line, Fig. 5 is an exploded perspective view of the main parts, Fig. 6 is an explanatory diagram of the operation when folded, Fig. 7 shows the folded state, and Fig. 8 is one side of the table. Shown with side folded. A...Top plate, B...Support leg, C...
...First link, D...Second link, 1. 2
．． 3...Pin, 4...Protrusion, 5...
...Concavity, E...Spring rod.

Claims (1)

[Scope of utility model registration request] One end of the first link is pivotally connected via a pin to the upper part of the collapsible support leg whose upper part is pivotally connected to the bottom side of the top plate, and one end is pivotally attached to the bottom side of the top plate via a pin. A portion of the second link that is closer to the other end is rotatably connected to the other end of the first link via a pin, and a protrusion is provided on the portion of the second link that is closer to the other end than the position of the pin. The upper edge of one link is formed with a recess into which the protrusion can engage, and the protrusion, the engaging part, and the recess are engaged, and the coil is elastically biased downward so that both links become straight. Folding and unfolding of a support leg of a table characterized in that a spring rod, the tip of which is attached, is interposed between the support leg and the first link and between the lower surface of the top plate and the second link. Device.