JPS6243128Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a leg connector used for attaching pipe legs to the deck of a table or the like.

The above-mentioned known leg connector is constructed as follows. In other words, by suspending three arc-shaped connecting pieces equally divided in the circumferential direction from a board that is fixed with screws to the back of the deck of a table, etc., a cylindrical connecting tube is protruded, and one of the connecting pieces is A fixing screw is screwed through a screw hole provided horizontally in the connecting piece, and the conical part provided at the tip of the screw hits the other two connecting pieces, so that the diameter of the connecting cylinder can be expanded freely. That is, by pressing the two connecting pieces in the radial direction by screwing in the fixing screw,
The reaction force is received by the one connecting piece, thereby connecting and fixing the pipe leg which is externally mounted on the connecting cylinder. However, in the above conventional example, only a circular pipe leg that is fitted into a cylindrical connecting tube can be connected and fixed, and it is not suitable for fixing a rectangular pipe leg.

The present invention improves the above-mentioned leg connector so that both circular pipe legs and square pipe legs can be firmly fixed with easy operation without loosening or rattling. The purpose is to

The present invention will be described in detail below based on the illustrated embodiment. As shown in FIGS. Connecting pieces 2a, 2 having an arcuate cross section
A cylindrical connecting tube 2 formed by b and 2c,
It is the same as that described above in that a fixing screw 4 is provided in the screw hole 3 provided horizontally in the one connecting piece 2a, which is threaded through the screw hole 3 so as to be able to move forward and backward.

The connecting pieces 2a, 2b, 2c are equally divided in the circumferential direction, spaced apart from each other by an adjoining distance a of an appropriate width, and hung vertically on the same circumference. A cylindrical connecting tube 2 is formed in the cylindrical connecting tube 2, and therefore each has an arc-shaped cross section, and horizontal ribs 5a, 5b, and 5c are horizontally disposed in a fan shape from the inner surface of the wall toward the center. A thick wall portion 6a is formed at the center of the rib 5a of the two connecting pieces 2a, and the screw hole 3 is formed through the thick wall portion 6a in the radial direction.

Each rib 5 in the remaining two connecting pieces 2b and 2c
Thick walled portions 6b and 6c are formed along the axis of the screw hole 3 at adjacent and opposing ends of the screw holes 6b and 5c, and the protruding end 6
The tip of the fixing screw 4 can enter between b'6c' and abut against the protruding end.

That is, in more detail, the fixing screw 4
A conical part 4b is provided at the tip of the threaded part 4a, and the conical part 4b is mounted between the thick parts 6b and 6c, and by screwing in the fixing screw 4,
The tapered surface of the conical part 4b is the thick part 6b, 6
The connecting pieces 2b and 2c are pressed and deformed in the radial direction, respectively.The connecting piece 2a receives the reaction force at this time, and the connecting piece 2a also moves in the radial direction. As a result of this deformation, the diameter of the connecting cylinder 2 is expanded.

Also, since the pipe leg must be fitted into the connecting tube 2, the fixing screw 4 naturally fits into the screw hole 3.
In order to rotate the fixing screw 4, a tool insertion hole 4c is recessed in the shape of a polygon or the like in the case shown in the figure. .

As mentioned above, the connecting tube 2 must be able to expand and contract in diameter by screwing in and out the fixing screw 4, so the connecting pieces 2a, 2b, 2c and the base plate 1 can do this. It is made of a material such as metal that is sufficient for smoothing.

Further, the board 1 has an appropriate number of screw insertion holes 1a.
..., and as shown in the figure, deck 7 for tables etc.
It is fixed on the back side with screws 8.

In the present invention, the outer circumferential surface 2 of the connecting cylinder 2
d is not only formed with a circular outer periphery as described above so that the circular pipe leg 9 can be fitted to any of the square pipe legs 10, but also has a square pipe leg 10.
At positions corresponding to the sides 10a, 10b, 10c, and 10d, the circular outer peripheral surface has an occluded circular plane portion 2e,
2f, 2g, and 2h are arranged vertically.

Here, the occluded plane portions 2e...2h may be provided at any position as long as they face each side 10a...10d of the square pipe leg 10, but as in the illustrated example, they may be provided at any position on the deck 7. If the square pipe leg 10 is installed in a position parallel to the end sides 7a, 7b, for example, when installing the square pipe leg 10 near the corner of the deck 7, It is convenient that the two sides 10c and 10d can be attached parallel to each other as shown in FIG.

Further, on the back surface of the substrate 1, the connecting tube 2
A circular fitting groove 11 and a square fitting groove 12 are provided on the outer periphery of the base, so that the upper end edges of the circular pipe leg 9 and the square pipe leg 10 can be fitted, respectively.

Here, it is a matter of course that the fitting grooves 11 and 12 are provided in advance to match the diameter of the circular pipe leg 9, the shape and dimensions of the square pipe leg 10, and the direction of each side.

Furthermore, the missing circular plane portions 2e, 2f of the connecting cylinder 2,
2g and 2h, as shown in FIG. 2 and FIG. The missing circular plane portions 2h are provided on the outside of the connecting pieces 2c, and each connecting piece 2a, 2b, 2 is secured by a fixing screw 4.
When pressing and displacing c to the outside, that is, when expanding the diameter of the connecting tube 2, each side 2e, 2 of the square pipe leg 10
The expanding force of each connecting piece 2a, 2b, 2c acts equally on f, 2g, 2h, so that the rectangular pipe leg 10 can be firmly and concentrically fixed to the connecting tube 2 in a stable state. It is better to set it in

In addition, both the circular pipe leg 9 and the square pipe leg 10,
A window hole 13 is previously opened at a position facing the screw hole 3 in a state where it is fitted into the connecting tube 2 so that a tool can be inserted therein.

Therefore, in the above configuration, in order to attach the pipe legs to a table etc. using this, first, the deck 7
The board 1 is fixed at a desired position, such as near the corner of the back surface, with screws 8 in a desired direction.

Next, the circular pipe leg 9 or the square pipe leg 10
Either one of the desired pipe legs may be selected and used. In this case, the connecting tube 2 is in a reduced diameter state, and the circular pipe leg 9 is fitted onto the connecting tube 2 and the upper end thereof is fitted. It fits into the groove 11, and the window hole 13 provided in its peripheral wall matches the screw hole 3 of the connecting tube 2.

In other words, since the circular pipe leg 9 has no directionality,
It is only necessary to align the window hole 13 and the screw hole 3 as described above.

On the other hand, when using the square pipe leg 10, each side 10a, 10b, 10
c, 10d and the window hole 13 are fitted into the connecting cylinder 2 so as to match with each occluded circular plane part 2e, 2f, 2g, 2h and the screw hole 3 of the connecting cylinder 2, and the upper end is fitted into the fitting groove 12. Fits in.

Next, when the tool is inserted into the screw hole 3 from the window hole 13 and the fixing screw 4 is screwed in, as described above,
Since the connecting pieces 2a, 2b, and 2c are expanded outward and in a predetermined direction, the connecting tube 2 is expanded in diameter. The outer wall surface of each connecting piece 2a, 2b, 2d is crimped, and if it is a rectangular pipe leg 10, there is a cutout of each connecting piece 2a, 2b, 2c at the center of the inner surface of each side 10a, 10b, 10c, 10d. By crimping the circular parts 2e, 2f, 2g, and 2h, the circular pipe leg 9 and the square pipe leg 10 are fixed.

In this fixed state, the circular pipe leg 9 makes surface contact with the wide circumferential surface of the outer periphery of the connecting tube 2, so it is stably fixed, while the square pipe leg 10 is fixed stably. Since the portions 2e...2h are in surface contact with the sides 10a..., rotation is prevented and they are stably fixed in a predetermined direction.

As explained above, according to the leg connector according to the present invention, at least three arcuate connecting pieces 2a, 2b, 2c are connected to the back surface of the board 1 fixed to the back surface of the deck 7.
is vertically installed to form a connecting tube 2 that can expand and contract in diameter, and a fixing screw 4 is screwed through one of the connecting pieces 2a so as to be freely rotatable, and its tip is connected to the other two. The fixing screw 4 can be freely abutted against the connecting pieces 2b and 2c.
The outer circumferential surface 2d of the connecting tube 2 has a circular pipe leg 9 and a rectangular pipe leg 10, respectively, in which the diameter of the connecting tube 2 is enlarged by screwing into the connecting tube 2 so that the outer pipe leg can be fixed thereto. This is because it is formed to have a circular cross section as much as possible, and its outer peripheral surface is provided with occluded circular flat parts 2e, 2f, 2g, 2h that fit with each side 10a of the square pipe leg 10. , can be used both for attaching the circular pipe leg 9 and the square pipe leg 10, and in the case of the circular pipe leg 9, it fits into the connecting tube 2, while in the case of the square pipe leg 10, each side 10a...
By aligning and fitting the connecting cylinder 2 with each omitted circular plane part 2e..., and then screwing in the fixing screw 4, it can be firmly fixed in the specified direction without loosening or rattling. Can be connected to.

Moreover, in the leg connector of the present invention, since the base plate 1 is provided with the respective fitting grooves 11 and 12 for the circular pipe legs 9 and the rectangular pipe legs 10 on the back surface thereof, the fitting grooves 11 and 12 for the circular pipe legs 9 and the rectangular pipe legs 10 are provided, respectively. By fitting the end of the circular pipe leg 9 into the groove 11 or fitting the end of the square pipe leg 10 into the fitting groove 12, these pipe legs can be stably supported and connected easily. are formed, and the arc-shaped connecting pieces 2a, 2b,
A more solid leg connection state can be obtained by the diameter expansion fixing force of 2c and the fitting support in the fitting groove 11 or 12.

[Brief explanation of drawings]

Figure 1 is a side view of the leg connector according to the present invention;
The figure is a bottom view of the connector, Figure 3 is a vertical side view of the connector with a circular pipe leg connected to it, Figure 4 is a vertical side view of the connector with a rectangular pipe leg connected to it, FIG. 5 is a cross-sectional view taken along the - line in FIG. 4. 1... Board, 2... Connection cylinder, 2a, 2b, 2c
... Connection piece, 2d ... Outer peripheral surface of connection cylinder, 2e, 2
f, 2g, 2h... missing circular plane part, 4... fixing screw, 7... deck of table etc., 9... circular pipe leg, 10... square pipe leg, 10a, 10b, 1
0c, 10d...Each side of the square pipe leg, 11, 1
2...Fitting groove.

Claims (1)

[Scope of utility model registration request] A board fixed to the back surface of a table, etc., a connecting cylinder consisting of at least three circular arc-shaped connecting pieces hanging vertically from the board, and a connecting piece screwed through one connecting piece of the connecting cylinder, and screwable. and a fixing screw for expanding and contracting the diameter of the connecting tube, and the outer surface of the connecting tube is formed to have a circular cross section so that a circular pipe leg and a square pipe leg can be externally mounted, respectively. A leg connector, wherein the outer circumferential surface is provided with an occluded flat surface portion that fits each side of the square pipe leg, and the base plate has fitting grooves for the circular pipe leg and the square pipe leg on the back surface thereof, respectively.