JPS62500Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Field of Application in the Crossing Industry) The present invention relates to a desk leg folding device that allows folding and raising of the legs to be extremely light and easy, and can be easily assembled.

(Prior Art) Conventionally, desk leg folding devices that allow folding and standing up of the legs are extremely light and easy, have complex structures and require a lot of work to assemble the desk.On the contrary, devices that are easy to assemble are
The legs were not easy to fold or were not light.

Additionally, folding desks have the disadvantage that they tend to wobble during use.

(Problems to be Solved by the Invention) It is an object of the present invention to provide a desk leg folding device whose legs are extremely light and easy to fold, are easily assembled, and are hard to wobble during use.

(Means for Solving the Problems) The desk leg folding device of the present invention has the following configuration.

Due to the length of the rectangular top plate 1, the outer end 3
A square tube 2 with U-shaped metal fittings 4 surrounding it protruding from both ends to the back side, and a leg tube 5 having the same diameter as the square tube 2,
It is composed of an outer part 22, a bottom part 23, and an inner part 11, and has a downwardly open U-shaped body in cross section with a narrow part 24 at the upper end, and a notch 25 in the outer part 22 at the lower end.
A locking part 26 is provided inside the bottom part 23 near the narrow part 24, and an external fitting hole 1 is provided at the edge of the inner part 11.
3 and an internal fitting hole 13A, the diagonal support rod 10 is narrower than the diagonal support rod 10, has a narrow portion 27 at the lower end, and is open downward consisting of an outer wall portion 28, a bottom wall portion 29, and an inner wall portion 30. The operating rod has a U-shaped body when viewed in cross section, has a locking part 31 on the inside of the bottom wall part 29 near the narrow part 27, and has a protruding shaft 16 protruding near the substantially central edge of the inner wall part 30. 14, shorter than the square tube 2, and has long holes 21 at both ends.
It consists of a shelf 18 in which two outer horizontal bars 20A each having a hole therein are integrated in parallel with each other at an interval narrower than the interval between the two rectangular tubes 2.

Then, the leg tube 5 is pivotally attached to each U-shaped metal fitting 4 of the square tube 2 fixed in parallel to the back surface of the top plate 1 with a pivot 6, and the leg tube 5 is attached to the square tube 2 near each U-shaped metal fitting 4 with an axis 8. The pivoted diagonal support rod 10 and the operating rod 14 pivoted near the upper end of the leg tube 5 by a shaft 9 can be mountain-folded at the axis 15 located between the outer fitting hole 13 and the inner fitting hole 13A. The horizontal rod 12 is fixed between the lower ends of both diagonal support rods 10 at positions facing each other, and a coil spring 17 is tensioned between the locking portion 26 of the diagonal support rod 10 and the locking portion 31 of the operating rod 14. established,
The elongated holes 21 at the four corners of the shelf 18 are loosely fitted into the respective protruding shafts 16 protruding from the operating rod 14.

(Example) The desk leg folding device according to the present invention is shown in FIGS.
As shown in the figure, U-shaped metal fittings 4 are attached to both outer ends 3 of two square tubes 2 fixed in parallel to the back surface of the top plate 1.
are fixed, and the leg tube 5 is pivotally connected to each of the U-shaped metal fittings 4,
A diagonal support rod 10 pivoted to the square tube 2 near each U-shaped fitting 4 and an operating rod 14 pivoted near the upper end of the leg tube 5 are pivoted around an axis 15 so as to be freely mountain foldable. A coil spring 17 is stretched between the diagonal support rod 10 and the operating rod 14, and a shelf 18 is attached to each protruding shaft 16 protruding from the operating rod 14.
The four corners of the frame are loosely fitted.

As shown in FIGS. 1 to 3, the square tube 2 is
A U-shaped metal fitting 4, which is slightly shorter than the length of the rectangular top plate 1 and surrounds the outer end 3, is made to protrude toward the back side and is fixed to both outer ends 3.

The leg tube 5 is, as shown in FIGS. 1 to 3,
It is made of a square tube with the same diameter as the square tube 2.

As shown in FIGS. 1 to 3, the diagonal support rod 10 is composed of an outer part 22, a bottom part 23, and an inner part 11, and has a downwardly open upper part with a narrow part 24 at the upper end. The outer part 22 near the lower end is slightly cut out to form a notch 25, and a locking part 26 is provided inside the bottom part 23 near the narrow part 24, and is located above the notch 25. The outer fitting hole 13 and the inner fitting hole 13A are provided by slightly notching two edges of the inner side portion 11.

The diagonal support rod 10 has each of the narrow portions 24 at the upper end pivotally attached to the inner side near both outer ends 3 of the both square tubes 2 by the axis 8, and both diagonal support rods 10 at positions facing each other
A horizontal rod 12 is fixed between the inner parts 11 at the lower ends of the rods.

As shown in FIGS. 1 to 3, the operating rod 14 is slightly shorter than the length from the lower end of the diagonal support rod 10 to the inner fitting hole 13A, and narrower than the diagonal support rod 10,
A narrow part 27 is provided at the lower end, an outer wall part 28, and a bottom wall part 2.
9 and an inner wall portion 30, which is U-shaped in cross section and open downward, and has a bottom wall portion 29 near the narrow portion 27.
A locking portion 31 is provided on the inside of the inner wall portion 30, and a protruding shaft 16 is provided protruding near the substantially central edge of the inner wall portion 30.

As shown in FIGS. 1 to 3, the shelf 18 has elongated holes 21 bored at both ends of an outer horizontal bar 20A shorter than the rectangular tubes 2, and parallel to the spacing narrower than the spacing between the rectangular tubes 2. Two outer horizontal bars 20A are arranged on the outer horizontal bars 20A, and a vertical bar 1 is placed between the left and right inner sides near the long hole 21 of the outer horizontal bars 20A.
9 are fixed, and two parallel horizontal bars 20 are fixed at equal intervals between the vertical bars 19 on both the left and right sides.

Next, a method for assembling a desk equipped with the desk leg folding device according to the present invention will be explained.

Two rectangular tubes 2 with U-shaped metal fittings 4 fixed to both outer ends 3 are placed in parallel, and with the U-shaped metal fittings 4 protruding toward the back side of the top plate 1, screw them into the back side of the top plate 1 with screws 32. stick.

Each leg tube 5 is inserted into the U-shaped metal fittings 4 at the four corners and pivotally connected with a pivot 6.

On each inner side near both outer ends 3 of this both square tube 2,
Each narrow width part 24 at the upper end of both diagonal support rods 10 connected by a horizontal rod 12 is pivotally connected by a shaft center 8.

Each operating rod 1 is placed inside near the upper end of each leg pipe 5.
4 is pivotally connected to the shaft 9, and the upper end of the operating rod 14 is connected between the inner part 11 and the outer part 22 of the diagonal support rod 10 and the outer fitting hole 13 of the diagonal support rod 10. It is pivotally connected by a shaft 15 located between the inner fitting holes 13A, and an operating rod 14 is installed inside the diagonal support rod 10 so as to be foldable.

A coil spring 17 is stretched between the locking portion 26 of each diagonal support rod 10 and the locking portion 31 of each operating rod 14, and the protruding shaft 16 of each operating rod 14 is connected to each elongated hole of the shelf 18. 21 loosely fit.

Then, the leg pipe 5 pivoted to each U-shaped metal fitting 4 is brought into contact with the back plate portion 7 of the U-shaped metal fitting 4, and the bottom wall portion 29 of the operating rod 14 is attached to the inner surface of the bottom surface portion 23 of the diagonal support rod 10. Put the operating rod 1 into the external fitting hole 13 of the diagonal support rod 10 with the outer surfaces in contact with each other.
By fitting the protruding shafts 16 of 4, as shown in FIGS. 1 to 3, the desk is assembled with the leg pipe 5 in an erect state.

Next, a method for folding desk legs according to the present invention will be explained.

As shown in FIGS. 1 to 4, when the left and right horizontal rods 12 between the leg tubes 5 in an upright state are lifted, each diagonal support rod 10 moves upward around the axis 8,
The axis 15 of this diagonal support rod 10 moves upward.

Due to this movement of the axis 15, the upper end of the operating rod 14 moves upward, the coil spring 17 contracts slightly, and the fitting between the protruding shaft 16 of the operating rod 14 and the external fitting hole 13 of the oblique support rod 10 is released. The shelf 18 loosely fitted onto the protruding shaft 16 of the operating rod 14 moves slightly upward, and the operating rod 14
The leg passenger 5, which is pivoted, leans slightly inward about the pivot 6, resulting in the state shown in FIG.

When the horizontal rod 12 is further lifted from this state and the diagonal support rod 10 is brought into contact with the back surface of the top plate 1, the axis 15 of this diagonal support rod 10 moves upward, and this axis 1
5, the operating rod 14 rotates, and the shaft 9 of the operating rod 14 moves upward, and as the shaft 9 moves upward, the leg tube 5 falls inward and overlaps the rectangular tube 2.

On the other hand, the protruding shaft 16 of the operating rod 14 fits into the inner fitting hole 13A of the oblique support rod 10, and the shelf 18 moves upward.
The coil spring 17 is contracted to the maximum, and as shown in FIGS. 6 and 7, the diagonal support rod 10, the operating rod 14 and The shelf 18 is in a folded state.

In this way, the leg tube 5 is folded using the contraction force of the coil spring 17.

(Operation and Effect of the Invention) The desk leg folding device according to the present invention has the above-mentioned configuration, and includes a diagonal support rod 10 pivotally connected to the square tube 2 near each U-shaped metal fitting 4, and each of the square tubes 2. The operating rod 14 pivoted near the upper end of the leg pipe 5 pivoted to the U-shaped metal fitting 4 is connected to the shaft center 15 located between the outer fitting hole 13 and the inner fitting hole 13A.
The horizontal rod 12 is fixed between the lower ends of both diagonal support rods 10 facing each other, and the coil spring 17 is stretched between the diagonal support rod 10 and the operating rod 14. By simply lifting the horizontal rod 12, the leg tube 5 can be folded very easily and easily using the contraction force of the coil spring 17.

The desk leg folding device according to the present invention has the above-described configuration, and includes a diagonal support rod 10 pivotally connected to the square tube 2 near each U-shaped metal fitting 4, and a diagonal support rod 10 pivoted to each U-shaped metal fitting 4 of the square tube 2. The operating rod 14 pivoted near the upper end of the attached leg pipe 5 is connected to the axis 1.
5, the horizontal rod 12 is fixed between the lower ends of both diagonal support rods 10 facing each other, and a coil spring 17 is stretched between the diagonal support rod 10 and the operating rod 14. , has a simple structure and is easy to assemble.

The desk leg folding device according to the present invention has the above-described configuration, and when the leg pipe 5 is used in an upright position, the leg pipe 5
is in contact with the back plate portion 7 of the U-shaped bracket 4, the outer surface of the bottom wall portion 29 of the operating rod 14 is in contact with the inner surface of the bottom surface portion 23 of the diagonal support rod 10, and the outer fitting hole 13 of the diagonal support rod 10 is in contact with the outer surface of the bottom wall portion 29 of the operating rod 14. operating rod 1
Since the protruding shafts 16 of 4 fit together and the horizontal rod 12 is fixed between the lower ends of the diagonal support rods 10, the leg tube 5 that is erected during use is unlikely to wobble.

The desk leg folding device according to the present invention is configured as described above, and when the leg tube 5 is erected, the leg tube 5 comes into contact with the back plate part 7 of the U-shaped metal fitting 4, and the diagonal support rod 10 Bottom part 2
The outer surface of the bottom wall portion 29 of the operating rod 14 is in contact with the inner surface of the operating rod 10, and the protruding shaft 16 of the operating rod 14 is fitted into the outer fitting hole 13 of the oblique support rod 10. Since the rod 12 is fixed and a coil spring 17 is tensioned between the operating rod 14 of the oblique support rod 10, even if the leg tube 5 is shaken while in use, the contractile force of the coil spring 17 will The protruding shaft 16 of the operating rod 14 fitted into the external fitting hole 13 of the diagonal support rod 10 will not come off inadvertently from the external fitting hole 13, and the leg pipe 5 can be effectively prevented from wobbling when erected. It is.

The desk leg folding device according to the present invention has the above-described configuration, and includes a diagonal support rod 10 pivotally connected to the square tube 2 near each U-shaped metal fitting 4, and a diagonal support rod 10 pivoted to each U-shaped metal fitting 4 of the square tube 2. The operating rod 14, which is pivoted near the upper end of the leg tube 5, is connected to the shaft center 15 located between the outer fitting hole 13 and the inner fitting hole 13A.
Because they are pivoted so that they can be folded in a mountain shape, the diagonal support rod 10, operating rod 14, and shelf 18 are folded within the height of the folded square tube 2 and leg tube 5, making it less bulky. , there are no unnecessary protrusions, and many pieces can be stacked for storage and transportation.

[Brief explanation of the drawing]

Fig. 1 is a front view of a desk having a desk leg folding device according to the present invention with the leg pipe in an upright state, Fig. 2 is an enlarged front view of the main part of Fig. 1 with some parts omitted, and Fig. 3 is a front view of the leg pipe. FIG. 4 is a partially omitted enlarged sectional view taken along the line A-A in FIG. 3; FIG. 5 is a partially omitted enlarged sectional view showing the leg tube in the middle of folding; FIG. 6 is a partially omitted enlarged sectional view showing the leg tube in a completely folded state, and FIG. 7 is a partially omitted enlarged bottom view of the leg tube in a completely folded state. 1... Top plate, 2... Square tube, 3... Outer end, 4
... U-shaped metal fitting, 5 ... Leg tube, 6 ... Pivot, 7 ...
Back plate part, 8... Axis core, 9... Shaft, 10... Oblique support rod, 11... Inner part, 12... Horizontal rod, 13... External fitting hole, 13A... Inner fitting hole, 14... ...Operating rod, 15
... shaft core, 16 ... protruding shaft, 17 ... coil spring,
18...shelf, 19...vertical bar, 20...horizontal bar, 20
A... Outer horizontal bar, 21... Long hole, 22... Outer part, 23... Bottom part, 24... Narrow part, 25...
Notch portion, 26...Locking portion, 27...Narrow width portion, 28
...Outer wall part, 29...Bottom wall part, 30...Inner wall part,
31...locking part, 32...screw.

Claims (1)

[Scope of utility model registration request] A U-shaped metal fitting 4 surrounding the outer end 3 and protruding toward the back side
, a square tube 2 fixed to both outer ends 3, and a square tube 2
It is composed of a leg tube 5 having the same diameter as , an outer part 22 , a bottom part 23 and an inner part 11 . A notch 25 is provided, a locking portion 26 is provided inside the bottom portion 23 near the narrow portion 24, and the inner portion 11 is provided with a locking portion 26.
A diagonal support rod 10 having an external fitting hole 13 and an internal fitting hole 13A on the end edge thereof, which is narrower than the diagonal support rod 10 and has a narrow portion 27 at the lower end, an outer wall portion 28, a bottom wall portion 29, and an inner wall. A locking part 31 is provided inside the bottom wall part 29 near the narrow part 27, and a protruding shaft is provided near the substantially central edge of the inner wall part 30. 16 protrudingly provided, and two outer horizontal bars 20A that are shorter than the square tubes 2 and have elongated holes 21 at both ends, integrated in parallel at an interval narrower than the interval between the square tubes 2. 18, the leg tube 5 is pivotally connected to each U-shaped metal fitting 4 of the square tube 2 fixed parallel to the back surface of the top plate 1 by a pivot 6, and A diagonal support rod 10 pivotally connected by a core 8 and an operating rod 14 pivotally connected by a shaft 9 near the upper end of the leg tube 5 are connected by a shaft core 15 located between the outer fitting hole 13 and the inner fitting hole 13A. Both diagonal support rods 1 are pivotably mounted so that they can be folded in a mountain direction, and are located opposite to each other.
A horizontal rod 12 is fixed between the lower ends of 0, a coil spring 17 is stretched between the locking part 26 of the diagonal support rod 10 and the locking part 31 of the operating rod 14, and each protruding shaft protrudes from the operating rod 14. A desk leg folding device in which elongated holes 21 at the four corners of a shelf 18 are loosely fitted into 16.