JPS6214902Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to a folding desk whose legs are folded onto the lower surface of the deck.

Conventionally, there are many folding mechanisms of this type, but all of them either cause the folding legs to sway during use, making it impossible to function as a stable desk, or the legs are made too rigid, making the overall structure complicated and making folding difficult. There were various problems such as being difficult to operate, generating a loud impact noise when folded due to the elasticity of the spring, and being unable to be stacked stably and requiring a large amount of storage space.

This invention was made to solve the above problems, and its purpose was to make both the legs and the tension device that supports between the legs foldable, thereby improving the structure. A desk that is easy to fold, has stable legs and functions as a complete desk when in use, and can be quietly folded and stored in stable multi-tiered storage when not in use. The purpose is to provide a folding mechanism.

Hereinafter, embodiments of this invention will be described based on the accompanying drawings.

First, to explain the configuration, as shown in Figure 1,
A deck receiver 2 formed in a U-shape with frame attachment portions 2a on both sides is provided in the center band of the lower surface near both ends of the deck 1 in the longitudinal direction according to a predetermined width and length, and is fastened with screws by abutting the U-shaped surfaces. They are fixed facing each other with . A support shaft 15 for foldably supporting a tensioning device S, which will be described later, is fixedly inserted into each inner intermediate longitudinal surface of the deck support 2 in a horizontal manner parallel to the longitudinal direction of the deck 1. Furthermore, L-shaped support plates 3a are attached to both ends of the deck support 2 in the longitudinal direction, and support shafts 3a are attached to the support plates 3a to foldably support legs 4, which will be described later. 3b is fixedly inserted horizontally perpendicular to the longitudinal direction of the deck 1.
are mounted facing each other with bolts to the frame mounting portions 2a at each position.

Legs 4 shown below are foldably connected to each end of both frames 3 as described above.
This leg body 4 is formed as follows. That is, as shown in FIGS. 1 and 2, this leg 4
The whole is formed into an E-shape by welding oval metal cylinders. Side lids 4c with support holes 4d are integrally fitted at both ends of the upper horizontal member. Further, small-diameter holes 4e are provided at left and right positions close to both ends of the surface that is exposed on the lower surface side of the deck 1 and becomes the surface portion when the leg body 4 is folded. In order to prevent damage to the upper surface of the deck 1 that will be in contact with the legs 4 when the desk is folded and stored in multiple tiers, a rubber spacer 16 is attached with rivets at this position. Each is fixed.
Furthermore, a substantially L-shaped receiving part 4b is provided at the lower end of the vertical plate to protrude halfway inside the vertical member part directly below this upper horizontal member part, and a rubber-based through-piece deflection prevention member 18 is lined at this position. A deflection prevention plate 4a having a shaft insertion hole 4f for locking the tip of a stopper shaft 6, which will be described later, is fixed in the middle of the vertical surface directly above it with rivets. The leg body 4 formed in this manner has the support holes 4d at both ends of the upper horizontal member part pivotably fitted to each of the support shafts 3b of the frame 3, and by holding the fulcrum of each of the support shafts 3b, It is connected to the inside position parallel to the longitudinal direction of the deck 1 so as to be foldable. In addition, on the lower surface of the deck 1, which corresponds to approximately the central zone where each of the lower transverse members of the folded legs 4 are located, there is an L-shaped elastic band in order to securely hold the folded legs 4. Leg stopper 17 using a plate
are installed facing each other.

A tension device S shown below is arranged between the legs 4. This tensioning device S is formed as follows. That is, as shown in FIGS. 1, 3, and 4, this tensioning device S has a hollow elongated metal cylinder 5 whose cross section parallel to the longitudinal direction of the deck 1 is approximately elliptical.
A rotary bar 5a having a support hole 5b provided in the upper part of a vertically long plate is fitted and welded to both ends of the elongated metal cylinder 5, and a bearing part 5c having a receiving hole 5d is fitted into both ends of the elongated metal cylinder 5. It is worn. A knob hole 5e for movably inserting a knob 13, which will be described later, is provided on the upper surface of the metal cylinder 5, which corresponds to the middle zone, and is parallel to the longitudinal direction, and a pin hole 5f is provided on the adjacent vertical surface. It is installed through. At an internal position of the metal cylinder 5 according to this aspect, there are two stopper shafts 6 of the same shape made of a round bar with a length slightly exceeding half of the metal cylinder 5, and each other end has a bearing portion 5c at each position. is slidably inserted into the receiving hole 5d, and one end of each is arranged vertically in parallel inside the knob hole 5e. Each end of the stopper shaft 6 is clamped to two link plates 7 made of band-shaped plates with a length approximately close to the internal height of the metal cylinder 5, and a pin 12 is attached at each position.
are connected by. In this case, the above-mentioned link plate 7 is configured such that the stopper pin 8 is inserted through the pin hole 5f into the hole provided in the intermediate band on each surface, and the pin collar 9 is fitted into the stopper pin 8 and the pin collar 9 is fitted into the hole. color 1 on both sides
0, the other ends of both stopper shafts 6 are made to simultaneously protrude from the receiving hole 5d of the bearing portion 5c at each position by swinging with the pin collar 9 as a fulcrum. , or the above-mentioned receiving hole 5d
It is arranged in such a way that it can be raised and folded into the interior. In order to facilitate the operation of raising and lowering the link board 7, pin collars 9 between the link boards 7 are provided.
There is a return spring 1 whose entire body is wound in a dogleg shape.
1 is fitted, and this return spring 11
Each end of the winding is engaged with the upper and lower stopper shafts 6. As a result, each other end of both stopper shafts 6 is held in the receiving hole 5d at each position by the elastic force of the return spring 11, except when the desk is folded.
It is configured to protrude from the outside. Further, in order to guide the raising and lowering operation of the link plate 7 as described above from the outside, a knob 13 is inserted into one end of the upper stopper shaft 6 from the outside of the knob hole 5e. Note that 14 is a retaining ring that prevents the stopper pin 8 inserted into the pin hole 5f from coming off.

The tensioning device S according to the above aspect includes the rotating bar 5a
After fitting the support hole 5b to the support shaft 15 at each position and securing it with a nut so that it can swing, the lower end of the rotary bar 5a is attached to the tension stopper 18 of the leg 4 when the desk is used. By being press-fitted, the tensioning device S is configured to be placed in pressure contact between the legs 4 and to play a role in stabilizing and strengthening the legs 4. In this case, each other end of both stopper shafts 6 is locked in the shaft insertion hole 4f at each position by the elastic force of the return spring 11 described above, and positively supports the fixing state of the tension device S. It is configured as follows.

Next, the effect will be explained.

When folding the desk when not in use with the above configuration, first turn the desk upside down as shown in Figure 2, and then insert the knob 13 into the knob hole 5.
When the link plate 7 moves from one hole edge to the other hole edge side, the link plate 7 is biased in the upright direction by the elastic force of the return spring 11 until just before it is guided by the knob 13, and both stopper shafts 6 are moved. Each other end protrudes outward from the receiving hole 5d as shown in FIG. It is pulled by the link plate 7 that performs the tilting operation using the fulcrum 9, and simultaneously moves toward the center position of the tensioning device S for the same amount. Therefore, each other end of the stopper shaft 6 is retracted into the receiving hole 5d at each position, so that from this point on, the tensioning device S
It becomes possible to swing in the direction away from the leg body 4 using the fulcrum 5 as a fulcrum. As a result, the above-mentioned tension device S is
One side can be folded inside.

As a result of the above, the legs 4, which had been forced into a stance mode by the press-fitting of the tensioning device S, are now
It will be opened simultaneously with the folding operation of the tensioning device S. Therefore, at this point, the above leg body 4 is
By tilting inward using the support shaft 3b at each position as a fulcrum, both legs 4 can be folded to the lower surface position of the deck 1. In this case, since the leg fasteners 17 are arranged in the center band of the lower surface of the deck 1, each leg 4 is supported with elastic force by the metal fittings 17 at each position. Furthermore, since the rubber spacer 16 is exposed on the upper horizontal member of each folded leg 4, even if the folded desk is stored in multiple tiers, the upper surface of the deck 1 will not be damaged. can be easily prevented.

As explained above, in this invention, both the legs and the tension device that supports between the legs are formed to be foldable, making it easy to fold with a simple mechanism, and when in use. The above-mentioned tension device allows both legs to maintain a stable stance, allowing the desk to function as a complete desk.
In addition, when not in use, both legs can be folded quietly by releasing the lock of the stopper shaft guided by the knob and folding the tension device. Since the folding desk can be stored in multiple stages depending on the conditions, it has the effect of greatly increasing the functionality and quality of the folding desk.

[Brief explanation of the drawing]

Fig. 1 is an exploded perspective view of a desk using the folding mechanism of this invention, Fig. 2 is a partial operational view of the folding mechanism of the desk, and Fig. 3 is a partial diagram showing the internal structure of the tension device, which is the main part of this invention. Longitudinal cross-sectional view, Figure 4 is the 3rd
FIG. 2 is a cross-sectional view of main parts taken along line A-A in the figure. 1...Deck, 2...Deck support, 3...Frame, 3b, 15...Spindle, 4...Leg body, 4a...
Anti-flare plate, 4f...Shaft insertion hole, 5...Metal cylinder, 5
a...Rotating bar, 5c...Bearing portion, 5d...Receiving hole, 5e...Knob hole, 6...Stopper shaft, 7
...Link board, 9...Pin collar, 11...Return spring, 16...Spacer, S...Tension device.

Claims (1)

[Scope of utility model registration request] A deck support 2 and a frame 3 are fixed to the lower surface of the deck 1, a leg body 4 is connected to the support shaft 3b of the frame 3, and a tension device S is connected to the support shaft 15 of the deck support 2 in a foldable manner. , this tensioning device S has a hollow elongated metal tube 5, a rotary bar 5a attached to both ends thereof and having a support hole 5b at the top, and a receiving hole 5d fitted to both ends inside the metal tube 5. The bearing part 5c, a stopper shaft 6 of the same shape, which is provided in the metal tube 5 and has a length slightly exceeding half the length of the metal tube 5, and a stopper pin 8 are supported in the metal tube 5 so as to be able to swing freely. Both ends are wrapped around a link plate 7 connected to one end of each stopper shaft 6 and a stopper pin 8, and a receiving hole 5d for the stopper shaft 6.
a return spring 11 that urges the spring to protrude outward from the
and a knob 13 provided at one end of the upper stopper shaft 6.