JPS643385Y2 - - Google Patents

Description

[Detailed explanation of the idea] [Industrial application field]

This invention relates to a structure in which both the left and right legs of a desk, low table, table, or other piece of furniture having foldable legs can be folded at the same time.

[Conventional technology]

In the past, various types of folding structures have been proposed in which the left and right pillars of furniture are linked and folded at the same time, but all of them have complex structures, cumbersome operations, and lack of reliability. There were flaws. For example, the structure in which the opposing pillars are folded using a pair of interlocking links pivoted to the control plate was developed in the Taisho era.
This configuration is disclosed in Utility Model Application Publication No. 1164 of 2013, but since no biasing force is used in this configuration, everything must be done manually, and the trajectory of displacement of the control plate cannot be held constant, so it is difficult to smoothly fold the pedestal. I can't do tatami. In addition, as a biasing means for folding the pedestal, in a table having automatic raising/lowering legs disclosed in Japanese Patent Application Laid-Open No. 56-70708, a pressure receiving plate having an abutting end that is displaced together with the hinge when the pedestal is folded, and a corresponding pressure receiving plate are used. A configuration using a leaf spring that bends along the rotation locus of the contact end is known. However, in the above configuration, the tip of the leaf spring needs to be a free end, and the abutting end moves in a circular motion, so it cannot be applied to the control plate as described above.

[Problem that the invention attempts to solve]

This device was devised as a result of intensive research in view of the above-mentioned drawbacks, and its main problem is to press the control plate with the biasing force of a biasing plate arranged on the same straight line as the interlocking link, and to control the tilting displacement of the control plate. To provide a folding structure of a pedestal in which a pair of pedestals can be easily folded or unfolded by making the locus constant, and by urging the tilting displacement of a control plate with the biasing plate.

[Means to solve the problem]

In order to solve the above-mentioned problems, this invention has a pair of pillars that are pivotally connected to the opposite sides of the back side of a member to be attached such as a top plate, so that the pillars can be folded freely. A control plate is disposed at an intermediate position between the pair of pillars, and the other ends of the pair of interlocking links are respectively pivoted to both ends of the control plate. The control plate connects one end to a midway position between the pivot positions of the pair of interlocking links, and the other end connects with the control plate when deployed. A technical measure is taken in which a biasing plate that extends in the same straight line as the interlocking link whose pivot point is upward and is biased in the direction toward which the attached member approaches is fixed to the back surface of the attached member.

[Effect]

The control plate is always biased toward the member to be attached, such as the top plate, by the biasing plate. The control plate can tilt in the left and right directions while moving the pivot position with the biasing plate up and down with reference to the pivot position with the biasing plate. This tilting of the control plate is performed by interlocking links pivotally connected to the right and left pillars and both ends of the control plate. Therefore, when the control plate assumes a vertical position with respect to the member to which it is attached, the pivot point with the biasing plate is farthest from the test object, so the bias (repulsive force) is at its maximum, and the When tilted in either direction, the repulsive force acts as a force to smoothly perform the folding, unfolding and standing up operations. Further, even when unfolding and folding, the biasing plate biases the control plate toward the top plate, so that the unfolded and biased state can be maintained.

【Example】

A preferred embodiment of this invention will be described below with reference to the drawings. The table shown in FIGS. 1 and 2 has pillars 2 and 3 hinged to both sides of a top plate 1, and a control plate 6 that slides on the back surface of the top plate at the center of the top plate 1, and Both upper and lower ends of the control plate 6 and each pillar 2,
3, and a biasing plate 7 having one end pivotally attached to the middle of the control plate 6 and the other end fixed to the top plate 1. That is, in this embodiment, the biasing plate 7 has one end pivoted P1 to the control plate 6 with the leaf spring biased toward the top plate (curved outward), and is attached along the longitudinal direction of the top plate 1. The other end extending from the top plate 1 is fixed to the top plate 1. Here, the control plate 6 is composed of a pair of left and right long metal plates, and has pivots near the center and both ends, and the center portion is pivotally connected to one end of the biasing plate 7 P1,
The lower end side (upper side in the figure) is pivotally connected P2 to one end of the interlocking link 4 of one pedestal 2, and the upper end side (lower side in the figure) is pivotally connected P3 to one end of the interlocking link 5 of the other pedestal 3. There is. Further, each of the interlocking links 4 and 5 is hinged to the horizontal beam of the pillars 2 and 3 at the other end, respectively. Note that a reinforcing plate 8 made of a metal plate is fixed at a sliding contact position on the back surface of the top plate of the control plate 6. Since it is configured in this way, the operation of this folding mechanism will now be explained based on the schematic diagrams in FIGS. 3 to 5. In the folded position shown in FIG. The set position is slightly inclined from horizontal. In the case of the unfolded attitude shown in FIG. 5, the tilted attitude is almost the same except that the left and right sides are reversed. In this state, the biasing plate 7 biases the control plate 6 toward the top plate, in other words, the biasing plate 7 is biased in a direction that prevents the control plate 6 from rotating in the vertical direction. It can hold two or three folded postures and unfolded standing postures. In addition, in order to change from the folded position to the unfolded standing position, or from the unfolded standing position to the folded position, the pillars 2 or 3 are tilted in the respective directions against the biasing force of the biasing plate 7. However, the control plate 6 in FIG.
The position where is perpendicular to the top plate 1, that is, the pedestal 2,
3 is inclined at 45 degrees, the pivot point P1 of the biasing plate 7 relative to the control plate 6 is maximally separated from the top plate 1, so that the repulsive force is maximum. If the control plate 6 continues to tilt further beyond this position, the repulsive force will be converted into force and will urge the folding or unfolding operation, so the folding or unfolding operation will be smoothly performed. It can be carried out. Further, since the reinforcing plate 8 is fixed at the position where the control plate 6 slides into contact with the back surface of the top plate, it is possible to prevent the back surface of the top plate from being worn and damaged due to the back and forth sliding movement of the control plate 6. Next, FIG. 6 shows a different embodiment in which a guide plate 9 for guiding the reciprocating sliding movement of the control plate 6 is provided on the back surface of the top plate. That is, in this embodiment, a pair of guide plates 9 are provided upright at positions sandwiching the control plate 6 from both sides. This guide plate 9 has an elongated hole 9a extending in parallel along the longitudinal direction of the top plate 1. Both ends of the elongated hole 9a are communicated with locking holes that stand up vertically in the direction of the top plate (in the figure, they hang down). On the other hand, the control plate 6 is provided with a sliding shaft 9b that projects outward and is slidably latched onto the elongated hole 9a. Therefore, since the control plate 6 repeatedly moves back and forth along the elongated hole 9a of the guide rail 9 via the sliding shaft 9b, the control plate 6 always moves on a constant trajectory.
The pillars can reciprocate and repeat the stable folding, unfolding and standing up operations of the pillars. Further, the guide rails 9 may be integrally formed by standing up from both sides of the reinforcing plate 8 in the above embodiment. In addition, in FIG. 7, wheels W shown as an example of a sliding element are provided on both sides of the control plate 6 to make the back surface of the top plate slidable, and restraint walls are provided to restrict the running trajectory of the wheels W to a constant. It consists of a set structure. This restraining wall may have a structure that only raises both sides of the reinforcing plate 8. Here, the sliding element may be a rolling means such as a bearing, or a known structure such as a low-friction material, and the sliding element may be a control plate or the back side of the top plate on which the control plate slides (reinforcement plate). It may be provided on the sliding surface of. In this embodiment, the control plate 6 is in sliding contact with the back surface of the top plate, but other members interlocking with the control plate 6, such as the end side (lower end side in the figure) of the interlocking link 5 near the top plate, are Of course, it is also possible to make sliding contact. Further, in the above embodiment, the folding structure of the pillars is applied to the table, but the present invention can be applied to all other furniture such as low tables and desks to which the pillars are attached.

[Effect of the idea]

Since this invention has the above configuration, the biasing plate always presses the control plate against the attached member by the biasing force, and the biasing plate is arranged on the same straight line as the interlocking link. The control plate can be displaced along a constant trajectory without providing guide means. In addition, by pivoting the biasing plate at the center of the control plate, it is possible to flex the biasing plate by vertically displacing it without greatly displacing it in the lateral direction. The tilting movement can be reliably biased. This is advantageous because the work of folding, unfolding, and raising the pillar can be accomplished easily and reliably. Furthermore, since the structure is simple, mass production is possible and cost performance is high.

[Brief explanation of drawings]

Figure 1 is a rear view of a table showing a preferred embodiment of this invention when the legs are unfolded and erected, Figure 2 is a rear view of the legs when they are folded, and Figure 3 is a rear view when the legs are folded. A schematic diagram of the state, Figure 4 is a schematic diagram of the state where the biasing force (repulsion force) of the biasing plate is maximum, Figure 5 is a schematic diagram of the pedestal when it is erected and deployed, and Figure 6 is a schematic diagram of the state where the quadrail is installed. Main part side view showing different embodiments when
FIG. 7 is a sectional view of a main part showing another embodiment in which a control plate is provided with wheels as an example of a sliding element. 1... Top plate, 2, 3... Pillar, 4, 5... Interlocking link, 6... Control plate, 7... Biasing plate, 8
...Reinforcement plate, 9...Guide rail, W...
Wheel.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A pair of pedestals that are pivotally attached to opposite sides of the back side of a member to be attached, such as a top plate, so that they can be folded freely; a pair of interlocking links that extend in the same straight line toward the center after being installed;
a control plate to which the other ends of the pair of interlocking links are respectively pivotally connected on both ends thereof, so that the pair of pillars can be interlocked in the folding or unfolding direction; and a pivoting position of the pair of interlocking links with the control plate. One end is connected to a midway position between the two, and the other end is connected to a biasing plate fixed to the back surface of the attached member, extending in the same straight line as the interlocking link whose pivot point with the control plate is upward when deployed. The folding structure of the pillar is characterized by the following: (2) The folding structure of the pedestal according to claim 1 of the utility model registration claim, characterized in that a reinforcing plate is fixed to the back surface of the member to be attached in a range where the control plate is displaced. (3) The pedestal according to claim 1 of the utility model registration claim, characterized in that a sliding member is provided on the control plate or the interlocking link near the member to which it is attached, so that it can slide freely on the back surface of the member to which it is attached. Folding structure. (4) A request for registration of a utility model characterized in that a guide rail is provided on the back surface of the attached member to guide the sliding movement of the control plate or the interlocking link closer to the attached member within the range in which the control plate is displaced. The folding structure of the pedestal according to item 1.