JPH03257272A - Connecting column - Google Patents

Abstract

PURPOSE:To connect both pipes in the presentable and rigid state by fitting a connecting cylinder, provided at the lower part of a pipe, into a fitting pipe, and rotating a screw shaft to enlarge an inhibit cylinder so as to be press-fitted to the inner peripheral surface of the fitting pipe. CONSTITUTION:A connecting cylinder 2 is provided in the state of the upper end thereof being rigidly fixed at the lower inner periphery of a pipe 1, and a host joint piece 7 is provided at the lower face of the connecting cylinder 2. A screw shaft 11 with the head part thereof rotated inside the pipe 1 is inserted through inside the connecting cylinder 2, and a subordinate joint piece 15 is screwingly fitted at the lower part of the screw shaft 11. An inhibit cylinder 19 formed of an elastic plate of C-shaped cross section is then disposed between both joint pieces 7, 15, and the connecting cylinder 2 is fitted into a fitting pipe (b). In this state, the screw shaft 11 is rotated from an upper part in the pipe 1 to elevate the subordinate joint piece 15, so that the inhibit cylinder 19 is pressed to be enlarged in the diametral direction, and thus the outer peripheral surface of the inhibit cylinder 19 is press-fitted to the inner peripheral surface of the fitting pipe (b). Accordingly, both pipes 1, (b) are connected without using flanges or the like which may harm the outer appearance.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present application relates to a connecting column used when a column is axially connected to a mounting pipe and a lighting lamp, telephone stand, etc. is attached to the connected column.

Conventional technology Conventionally, when connecting a support made of pipes to a mounting pipe, flanges were provided on the end faces of the vibrators to be connected, and the flanges were screwed together or fitted onto the end of one pipe. The method used was to provide a mating shaft that protrudes, fit the end of the other pipe onto this mating shaft, and screw them together.

Problems to be Solved by the Invention However, according to the above-mentioned conventional connection method, not only is the screw-fastening portion exposed to the outside, which seriously spoils the appearance, but also when the support arm is rotatably attached to the outer periphery of the pipe, Alternatively, the flanges and screw heads get in the way during handling, and the screw-fastening portion tends to loosen.

Means for Solving the Problems Therefore, in order to improve the above-mentioned disadvantages, the present application provides a connecting cylinder whose upper end is fixed to the inner periphery of the lower part of the pipe and extends downward, and a connecting cylinder which is fixed to the lower surface of the connecting cylinder in the rotational direction. and an upper joint piece having an upwardly inclined surface along the outer peripheral edge of the lower surface, the upper joint piece being inserted into the connecting cylinder and extending downward from the lower surface of the upper joint piece, and forming a threaded part at the lower part thereof. ,
a screw shaft whose head can be rotated within the pipe; a lower joint piece that is screwed into the threaded portion of the screw shaft and has a downwardly inclined surface along the outer periphery of the upper surface; and the upper and lower joint pieces. A connection characterized by comprising a restraining tube made of an elastic plate having a C-shaped cross section, which is interposed between the inclined surfaces of the joint pieces, and whose upper and lower edges are fixed to each inclined surface so as not to be able to rotate. In order to connect the pipes in sequence, the lower part of the connecting cylinder and the upper and lower joint pieces each have an outer diameter that can be fitted into the pipe. Further, in the above, the upper joint piece is integrally provided on the lower surface of the connecting cylinder, and the engagement between the inclined surface and the upper and lower edges of the restraining cylinder is as follows.
The case consists of a locking protrusion extending in the radial direction provided on the locking surface, and the locking recess provided on the upper and lower edges of the restraining tube that locks on the locking protrusion, and the lower surface of the connecting tube and the upper joint piece. The fixing is done by a locking protrusion and a locking groove that locks thereto, and the locking between the inclined surface and the upper and lower edges of the restraining tube is done by a locking protrusion provided on the inclined surface and extending in the radial direction. , and locking recesses provided on the upper and lower edges of the restraining cylinder that locks therein, and the upper and lower joint pieces each form an inclined surface along the outer periphery of the thick disk. In some cases, the upper and lower joint pieces are formed by bending the outer peripheral edge of a disk to form an inclined surface, and the lower joint piece has a threaded portion of the screw shaft and a screw on the lower surface of its center. In some cases, a matching nut is provided.

Function: When connecting the pillars of the present application, for example, the lower part of the connecting tube is fitted from above to the mounting pipe buried in the corner of the desk, and the vibrators are joined together, and then a screwdriver or the like is connected. Use a tool to rotate the screw shaft from above the pipe to which the connecting tube is fixed. Then, the lower joint piece tries to rotate along with the screw shaft, but the inclined surface of this lower joint piece is locked to the lower edge of the restraining cylinder, and the upper edge of the locking cylinder is locked to the slope of the upper joint piece. As a result, the rotation of the lower joint piece is restrained, and the rotation of the screw shaft causes the lower joint piece to rise, and the top and bottom of the restraining tube are pressed by the inclined surfaces of the upper and lower joint pieces. The restraining tube expands in the diametrical direction and its outer circumferential surface presses against the inner circumferential surface of the attachment pipe, thereby connecting the pipe to the attachment pipe via the connecting tube.

Embodiment The embodiment of the present application will be described in detail below with reference to the drawings. A connecting member A is provided at the lower end of a pipe (1) constituting a support column to be connected to a mounting pipe b buried in a corner of a desk B, for example. be. The upper part of this connecting member A is fitted into the lower end of the pipe (1) by press-fitting or welding, and the outer periphery of the intermediate part * (2)
' and a hollow connecting cylinder (2) whose lower part has an outer diameter that fits into the mounting pipe b;
) that extends integrally or radially on the lower surface of the locking protrusion (
3) and the locking groove (4) to be fixedly connected in the rotational direction, and has an outer diameter that fits into the mounting pipe b, and extends upward along the outer periphery of the lower surface. This slope (5) has a locking protrusion (6).
) is inserted into the connecting tube (2) with its head abutting the upper surface of the connecting tube (2) via a washer (8), and The upper joint piece (7
) is guided downward from the center hole (9) and has a threaded portion (10) at its lower part, and a threaded shaft (11) that is fitted into the mounting vibe b in the same manner as the upper joint piece (7). It has a matching outer diameter, and a downwardly inclined surface (
12), locking protrusions (13) are arranged radially on this inclined surface (12), and a screw hole (13) is formed in the center.
14) and is screwed onto the threaded portion (10) of the threaded shaft (11), and a lower joint piece (15) having a longitudinal slit (
16), and locking recesses (17) and (1B) that lock to the locking protrusions (6) and (13), respectively, on the upper and lower edges.
and a restraining cylinder (19) made of an elastic plate having a C-shaped cross section and made of, for example, a steel plate, which is interposed between the inclined surfaces (5) and (12), and is spaced from each other. axis (1
The lower end of 1) is provided with a swollen diameter part (20) for preventing the lower joint piece 15) from coming off.

Therefore, when connecting the prop of the present application to the mounting vibe b, insert the lower part of the connecting tube (2) into the mounting pipe b from above and abut the collar (1) on the upper surface of the mounting pipe b. condition, use a tool such as a screwdriver to remove the pipe (
1) Rotate the head of the screw shaft (11) from above.

Then, the lower joint piece (15) also tries to rotate together with the screw shaft (11), but the locking protrusion (6) of the upper joint piece (7)
) and the upper locking recess (17) of the restraining cylinder (19), and the lower locking recess (18) of the restraining cylinder (19) and the locking protrusion (13) of the lower joint piece (15). Since the rotation of the lower joint piece (15) and the restraining cylinder (19) is restricted by the locking of the lower joint piece (15), the rotation of the screw shaft (11) causes the lower joint piece (
15) rises and the inclined surface (5) of the upper joint piece (7)
and the inclined surface (12) of the lower joint piece (15) are connected to the restraining tube (
Press the upper and lower edges of the restraining tube (19).
expands in diameter, and the outer circumferential surface is pressed against the inner circumferential surface of the attachment pipe b, as shown in FIG. 2, thereby fixing the connector A to the attachment pipe b.

The above embodiment includes upper and lower joint pieces (7) and (15).
The case is shown in which the slanted surfaces (5) and (12) are formed along the outer periphery of the lower surface and the outer periphery of the upper surface, respectively.However, as shown in FIG. Then bend the periphery upward and downward respectively to form an inclined surface (
5), (12) may be formed; in this case, an inclined surface (2) a that matches the inclined portion of the upper joint piece (7) is formed on the outer peripheral edge of the lower surface of the connecting tube (2), In addition, the through hole (
21), and a nut (22) screwed into the threaded portion (10) is provided on the lower surface of the center thereof.

Effects of the Invention As described above, according to the present application, since the connection operation can be performed from inside the pipe, the appearance is extremely good, and it is also convenient when attaching a support arm to the outer periphery of the pipe.
In addition, since the outer circumferential surface is crimped to the inner circumferential surface of the mounting pipe, the attachment can be made strong, and since the connecting tube is interposed above and below the connecting portion, the mechanical strength of the connecting portion is excellent. The described configuration has the advantage that the connecting struts can be connected and extended in sequence in the axial direction.

[Brief explanation of drawings]

The drawings show an embodiment of the present application, in which No. 19 is a longitudinal sectional view, FIG. 2 is a longitudinal sectional view showing the state connected to the mounting pipe, FIG. 3 is an enlarged perspective view of the main part with some parts omitted, and No. 4 The figure is a longitudinal sectional view corresponding to FIG. 1 showing another embodiment. In the figure, (1) is a pipe, (2) is a connecting tube, (3) is a locking protrusion, (4) is a locking groove, (5), (12) are sloped surfaces, (6), ( 13) is a locking protrusion, (7), (
15) is a joint piece, (10) a spring part, (11) a spring shaft, (17) and (18) a locking recess, (19) a restraining tube, and A a connecting member. Figure 2

Claims (6)

[Claims] (1) A connecting cylinder whose upper end is fixed to the inner periphery of the lower part of the pipe and extends downward, and which is fixed to the lower surface of the connecting cylinder in the rotation direction,
and an upper joint piece having an upwardly inclined surface along the outer periphery of the lower surface; the upper joint piece is inserted into the connecting cylinder and extends downward from the lower surface of the upper joint piece, and a threaded portion is formed at the lower part of the upper joint piece; A screw shaft whose head can be rotated within the pipe, a lower joint piece that is screwed into the threaded portion of the screw shaft and has a downwardly inclined surface along the outer periphery of the upper surface, and the upper and lower joints. A connecting strut comprising a restraining cylinder made of an elastic plate having a C-shaped cross section, interposed between the inclined surfaces of the parts, and having upper and lower edges fixed to each inclined surface in a non-rotatable manner. . (2) The connecting strut according to claim 1, wherein the lower part of the connecting tube and the upper and lower joint pieces each have an outer diameter that allows them to fit into the pipe. (3) The upper joint piece is integrally provided on the lower surface of the connecting cylinder, and the engagement between the inclined surface and the upper and lower edges of the restraining tube is achieved by a locking protrusion extending in the radial direction provided on the inclined surface. , and locking recesses provided on the upper and lower edges of the restraining tube that locks onto the connecting strut according to claim 1 or 2. (4) The lower surface of the connecting cylinder and the upper joint piece are fixed by a locking protrusion and a locking groove that locks on the locking protrusion, and the slope and the upper and lower edges of the restraining cylinder are locked, The connecting strut according to claim 1 or 2, comprising a locking protrusion extending in the radial direction provided on the inclined surface and locking recesses provided on the upper and lower edges of a restraining tube that locks onto the locking protrusion. (5) The connecting strut according to claim 1, 2, 3 or 4, wherein the upper and lower joint pieces each form an inclined surface along the outer periphery of a thick disk. (6) The upper and lower joint pieces each bend the outer peripheral edge of a disk to form an inclined surface, and the lower joint piece:
5. The connecting strut according to claim 1, further comprising a nut screwed into the threaded portion of the screw shaft on the lower surface of the center thereof.