JPH0510658Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a folding mechanism for a top plate of a folding table.

[Conventional technology]

Conventionally, a flat horizontally rectangular top plate attached to a leg frame that is approximately L-shaped or inverted T-shaped when viewed from the side,
Folding tables that stand up on the front side or the opposite side are used in various fields.

In this folding type table, the top plate is folded into an upright position, so by shifting the legs of the tables with their top plates folded to each other and crowding them in the front and back direction of each table. It has the advantage that it can be stored space-efficiently.

[The problem that the idea aims to solve]

However, since the folding and assembly operations of the top plate of the above-mentioned folding table are all done manually, it takes a lot of work to assemble and fold a large number of tables of this type. The disadvantage is that it requires a lot of manpower and effort.

Furthermore, conventional types of assembly and folding mechanisms utilize mechanical elements such as levers, cams, or springs to maintain or fix the assembled or folded state of the top plate. Therefore, in order to manually assemble or fold the top plate in these conditions, it is necessary to maintain the above state, release the fixing mechanism manually, and then remove the top plate, which is quite heavy. Since the robot is manually supported while being raised or laid down, it is easy for fingers to get caught in the mechanism and get injured, which also poses a safety problem.

[Means to solve the problem]

The present invention was made with the aim of solving the above-mentioned problems with the conventional folding table. In a folding table with a top plate attached to the upper end of the frame so that it can be folded down or raised up, an upper horizontal part with an open top is provided at the upper end of the leg frame, and a bracket is attached to the rear end of this horizontal part. On the other hand, the tip of a toggle member having a substantially lateral side is pivotally attached to the bracket portion by a horizontal axis, and the lower end of the toggle member is attached to the lower end of the toggle member and is attached to the lower part within the leg frame and extends along the frame. The upper end of the cylinder member, which acts as a buffer during stroke operation, is connected by a pivot shaft, and
The present invention is characterized in that the lower surface of the top plate is attached to the upper surface of the toggle member through an opening at the upper end of the frame.

[Effect]

The cushioning action of the cylinder member supports a part of the weight of the top when the top is raised or lowered when the top is raised or laid down, and also supports the weight of the top when the top is raised or lowered. to moderate the speed of.

〔Example〕

Next, an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a side view of an example of a folding table equipped with the mechanism of the present invention, FIG. 2 is a perspective view of the main part during folding, and FIG. 3 is a perspective view of another example of the main part.

Therefore, 1 is approximately L-shaped or approximately inverted T when viewed from the side.
Two of the leg frames 1 are arranged at the left and right ends of the folding table, and the vertical members 1a are connected to each other by a punch-like connecting member 1c. Note that the position where the connecting member 1c is provided is of course not limited to this example, and the connecting member 1c may be connected at the horizontal member 1b or the like.

The leg frame 1 has an upper horizontal portion 1d with a short cut protruding toward the front side of the table at the upper end of the vertical member 1a. Furthermore, this horizontal part 1
The shape of d is not limited to the illustrated embodiment, as long as its upper surface can support the back side of the top plate.

Reference numeral 2 denotes a top plate attached to the upper surface of the upper horizontal portion 1d at the upper end of the frame 1, and is composed of a top plate main body 2a made of wood or the like, and a top plate receiving member 2b that receives and supports the top plate main body 2a. .

The conventional folding table has the above-mentioned top plate receiving member 2b.
is pivoted at the front end or rear end of the upper horizontal part 1d of the leg frame 1 by a horizontal axis 3 parallel to the longitudinal direction of the top plate, so that it can freely rise and fall with respect to the vertical member 1a of the leg frame 1. It had the structure of

In addition, although not shown here, the conventional folding table mentioned above also has a
A lock mechanism is added to fix each state.

In the present invention, the top plate receiving member 2b is connected to the leg frame 1.
It is pivoted at the upper end by a horizontal shaft 3, but the structure of the part to which this shaft 3 is attached differs from conventional ones. This point will be explained below.

Reference numeral 1e denotes a bracket portion protruding from the rear end (left side in the figure) of the horizontal portion 1d, and is a mounting portion for the shaft 3. Reference numeral 11d denotes an opening formed on the upper surface of the horizontal portion 1d, and the tip of a toggle member 4 whose side surface is approximately shaped as shown in the figure is pivotally attached to the bracket portion 1e by a shaft 3. At the lower end of the toggle member 4, in this example, the upper end of a rod 5c of a cylinder 5, which acts as a damper during the upward stroke, is pivotally connected by a shaft 5a parallel to the shaft 3.

The cylinder 5 is the vertical member 1 of the leg frame 1.
The lower end of the cylinder 5 is fixedly pivotally connected to the member 1a by a shaft 5b parallel to the shaft 5a.

The receiving member 2b of the top plate 2 has its lower surface attached to the upper surface of the toggle member 4 with fixing means 4a such as screws.
It is fixed by.

As shown in the figure, the top plate 2 shown in Figure 1 is pivoted by a shaft 3 on the right side of the center of gravity with respect to the front and back of the top plate 2, so if it remains pivoted, the weight on the left side of the top plate will It turns counterclockwise around the center and stands up.

Therefore, in this embodiment, the following structure is adopted in order to lock and fix the horizontally laid down state shown in the first figure.

2c is an annular locking member 11 attached to the top plate receiving member 2b at a portion facing the upper surface of the upper horizontal portion 1d of the leg frame 1;
d' is a receiving hole formed on the upper surface of the horizontal part 1d to receive the locking member 2c, and 1f is a receiving hole formed on the upper surface of the horizontal part 1d.
from the front side toward the horizontal part, and the axis 1
The lock release lever attached by g is self-resetting with a spring etc. (not shown).
In the normal state, in the normal position, the tip of the lever engages with the locking member 2c inserted into the receiving hole 11d', thereby locking the top plate 2 in a horizontally lying position.

The table with the top plate 2 in the horizontal state, that is, in the assembled state, is folded in the following manner.

First, when the release lever 1f is pressed down, its tip is released from the locking member 2c. At this time, since the top plate 2 is pivotally mounted on the shaft 3 with its right side offset,
The tabletop 2 attempts to rotate counterclockwise around this axis 3 due to its own weight.

In the case of the conventional folding table top plate, if the weight of the top plate was not supported manually, the top plate would suddenly turn due to its own weight, which was very dangerous.

However, in the embodiment of the present invention, the top plate 2 is connected on the right side of the pivot shaft 3 to the cylinder 5 which acts as a damper in the upward stroke through the toggle member 4, so that the top plate 2 is connected to the cylinder 5 which acts as a damper in the upward stroke. The rotation is cushioned, and the robot rotates slowly, stands up, and folds up. It goes without saying that the upper end of the rod 5c may be pivotally attached to the back surface of the top plate 2 via the shaft 5a without using the toggle member 4.

The cylinder 5 has a piston valve structure that acts as a damper in the upward stroke and does not act as a damper in the downward stroke, for example, a one-way reed valve type valve. Therefore, when the above-mentioned raised and folded top plate 2 is brought into an assembled state, the cylinder 5 does not obstruct the assembly turning operation. In addition, in the figure, 6 is the curtain plate, 6a
is its mounting frame.

In the above embodiments, the top plate 2 is supported in an offset manner,
As a result, although we have described a mechanism that acts as a damper when pivoting in the upright direction due to its own weight as shown in Figure 1, in the present invention, the pivot position of the top plate 2 is opposite to the example in Figure 1. , in other words, because the position where it is deviated and supported is on the left side of the top plate 2, if the upright posture of the top plate becomes less than 90 degrees, the top plate will fall down due to its own weight and rotate horizontally by itself. It may be provided as a mechanism to support the movement of the plate.

In this case, the cylinder 5 used has a piston valve configured to act as a damper during its downward stroke.

Further, although it is sufficient to provide the mechanism of the above embodiment on either the left or right leg frame 1 of the table, it may be provided on both. For example, if the top plate 2 is long and the mechanism is provided only on one side of the leg frame 1, the top plate would be twisted, it is desirable to provide the mechanism of the present invention on both the left and right sides. Furthermore, depending on the length of the top plate, if the leg frame 1 is provided on the left and right sides of the top plate, as well as in the middle part, the present invention may be applied to the leg frame in the middle part. A mechanism may also be provided.

Here, the leg frame 1 is explained only when the vertical member 1a is vertical in the above embodiment, but the leg frame 1 may be a leg frame in which a member corresponding to the vertical member 1a is given an appropriate inclination angle, or a panel. The present invention can be applied even to frames that have a shape;
Of course. Also, the purpose of the table or desk does not matter.

[Effect of idea]

The present invention is as described above, and conventionally, a folding table of the type in which the top plate is folded by standing up on the front side or the other side, when folding or assembling the table,
Since the weight of the top plate had to be supported manually, the assembly and folding work was very labor-saving.However, the present invention allows for assembly and folding using the weight of the top plate, or
Since the pivoting motion during folding is supported by a cylinder member that is built into the leg frame and acts as a damper during the stroke motion, the speed of the pivoting motion due to the weight of the top plate is moderated, making it safe. This greatly reduces the weight of the top plate that must be supported manually, thereby increasing safety and labor-saving operations for folding and assembling the folding table.

[Brief explanation of the drawing]

FIG. 1 is a side view of an example of a folding table equipped with the mechanism of the present invention, FIG. 2 is a perspective view of the main part during folding, and FIG. 3 is a perspective view of another example of the main part. 1... Leg frame, 1d... Upper horizontal part, 1e
... Bracket part, 2 ... Top plate, 2b ... Top plate receiving member, 3 ... Shaft, 4 ... Toggle member, 4a ...
Fixing means, 5... cylinder, 5a, 5c... shaft,
5c... Rod.

Claims (1)

[Scope of utility model registration request] At the upper end of the leg frame raised from the floor,
In a folding table with a top plate attached so that it can be laid down or raised up, an upper horizontal part with an open top is provided at the upper end of the leg frame, and a bracket part is formed on the rear end side of this horizontal part; The tip of a toggle member having a substantially lateral side is pivotally attached to the bracket portion by a horizontal axis, and a lower portion of the toggle member is attached to the lower end of the toggle member within the leg frame to provide a buffering effect during stroke motion along the frame. assembly of a top plate in a folding table, characterized in that the upper ends of the cylinder members are connected by a pivot shaft, and the lower surface of the top plate is attached to the upper surface of the toggle member through an opening in the upper end of the frame. , folding mechanism.