JPH0758086B2 - Connecting prop - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present application relates to a connecting column used to connect columns to each other in the axial direction and to attach, for example, an illumination lamp or a telephone stand to the coupled columns.

2. Description of the Related Art Conventionally, in the case of connecting pipes to each other, a flange is provided on each end face of the pipes to be connected, and the flanges are screwed to each other, or a fitting shaft is projected to an end of one pipe. Then, the other end of the pipe of the fitting shaft is fitted and screwed together.

DISCLOSURE OF THE INVENTION However, according to the above-described conventional connection method, not only is the screwed portion exposed to the outer surface to significantly impair the appearance,
When rotatably attaching the support arm to the outer circumference of the pipe,
Alternatively, there are inconveniences such as the flange and the head of the screw becoming an obstacle during handling, and the screwed portion is easily loosened.

Therefore, in order to improve the disadvantages of the above, the present application integrally provides a lower portion fitted to the inner periphery of the upper portion of the mounting pipe below the upper portion fixed to the inner periphery of the lower portion of the pipe. And the upper support piece which is fixed to the lower surface of the lower part of the connecting cylinder, and which extends the fixed cylinder downward from the center, and extends downward from the lower surface of the fixed cylinder by being inserted into the connecting cylinder and the fixed cylinder. , A screw shaft having a screw portion formed at the lower portion thereof and a rotatable head portion at the upper portion, a lower support piece screwed to the screw portion of the screw shaft, and a central portion inserted into the fixed cylinder. And a lower part of the connecting cylinder so that the pipes can be sequentially connected to each other by providing an elastic deformable body interposed between the upper and lower supporting pieces. , The upper and lower support pieces are It has an outer diameter that allows it to fit inside the pipe, and is provided with a collar between the upper and lower parts, and the upper and lower surfaces of the elastic body cannot rotate with the locking projections provided on the upper and lower support pieces, respectively. It is further preferable that a fitting cylinder portion that extends upward and fits in the fixed cylinder and has a screw hole formed in the inner periphery is provided in the center portion of the lower support piece.

When the pipes are connected to each other, for example, a tool such as a screwdriver is attached to the mounting pipe embedded in the corner of the desk A while the lower part of the connecting cylinder is fitted from above and the pipes are joined together. The screw shaft is rotated from above the pipe on which the connecting cylinder is fixed. Then, the lower support piece rises due to the rotation of the screw shaft, the elastic deformable body is compressed by the upper and lower support pieces, and the elastic deformable body bulges outward and its outer peripheral surface is closely fixed to the inner peripheral surface of the mounting pipe. The pipe is connected to the mounting pipe via a connecting tube.

EXAMPLE An example of the present application will be described in detail below with reference to the drawings. (1) is provided at the lower end of a pipe (2) forming a column, and is connected to, for example, a mounting pipe a embedded in a corner of a desk A. A connecting member is shown, and the connecting member (1) has a pipe (2) at an upper portion.
A hollow connecting cylinder (4) integrally provided with an upper part fitted into the lower end part of the attachment by press fitting or welding and a lower part fitting into the upper end part of the mounting pipe a, and a lower part of the connecting cylinder (4) It has an outer diameter that is integrally provided on the lower surface, has an outer diameter that fits into the mounting pipe a, has a mounting hole (5) in the center, and has locking projections (6) arranged by cutting and raising on the lower surface. The upper support piece (7) provided, a fixed cylinder (8) whose upper end is fixed to the central portion of the upper support piece (7) and extends downward, and a head is a washer () on the upper surface of the connecting cylinder (4). 9) through which the screw shaft (11) is abutted and inserted into the fixed cylinder (8) from the inside of the connecting cylinder (4) and led out below the lower surface thereof, and the screw portion (10) is provided at the lower part thereof. ) Has an outer diameter that fits into the mounting pipe a like the upper support piece (7), and has a locking protrusion ( 12) is disposed, and the center portion is projected upward and slidably fitted in the lower portion of the fixed cylinder (8), and the inner periphery of the threaded portion (10) of the screw shaft (11) is provided. A lower support piece (15) integrally having a short fitting tube portion (13) engraved with a screw (14) screwed into The upper and lower surfaces are inserted into the fixed cylinder (8) and are interposed between the upper support piece (7) and the lower support piece (15), and the upper and lower surfaces thereof are the locking projections (5), (1).
2) and an elastically deformable body (17) such as rubber locked non-rotatably by the screw shaft (11) at the lower end of the screw shaft (11). 18) is provided.

When the pipe (2) is connected to the mounting pipe a, the connecting pipe (4) is inserted into the mounting pipe a from above and the lower part is fitted to the upper end of the mounting pipe a. The collar (3) is brought into contact with the upper surface of the mounting pipe a, and in this state, the head of the screw shaft (11) is rotated from above the pipe (2) using a tool such as a screwdriver. Then, due to the rotation of the screw shaft (11), the lower support piece (15) rises and the elastically deformable body (17) becomes the upper support piece (7) and the lower support piece (1).
5) It is compressed between it and bulges outward, and its outer peripheral surface is closely fixed to the inner peripheral surface of the mounting pipe a as shown in FIG.
As a result, the pipe (2) is connected to the mounting pipe a via the connecting tool (1).

In the above embodiment, a screw hole (14) screwed into the screw portion (10) of the screw shaft (11) is formed on the inner peripheral surface of the fitting tubular portion (13) provided at the center of the lower support piece (15). The case of engraving is shown, but the inner peripheral surface of the fitting tubular portion (13) does not have the screw hole (14),
The lower surface of the central portion of the lower support (15) may be integrally provided with a nut that is screwed with the threaded portion (10) of the screw shaft (11). It has been shown that the locking projections (6) and (7) are locked non-rotatably.
It goes without saying that the locking projections (6) and (12) may be fixed by adhesion without providing them.

As described above, according to the present application, the connection operation can be performed from the inside of the pipe and the appearance is very good, and it is convenient when the support arm is attached to the outer periphery of the pipe. Since the surface is in close contact with the inner peripheral surface of the mounting pipe, the mounting can be made firm, and since the connecting cylinder is interposed between the joints of the pipes, the mechanical strength of the connecting part is also excellent, and the elastic deformation due to the presence of the fixed cylinder There is no fear that the body will come into close contact with the screw shaft and restrain its rotation, and according to the configuration of claim 2, the connecting struts can be sequentially connected and extended in the axial direction, and the pipe It has an advantage that the bonding state can be made constant.

[Brief description of drawings]

The drawings show an embodiment of the present application, FIG. 1 is a vertical cross-sectional view, and FIG. 2 is a vertical cross-sectional view showing a state of being connected to a mounting pipe. In the figure, (1) is a connecting member, (2) is a pipe, (4) is a connecting cylinder, (6) and (12) are locking projections, (7) is an upper support piece, and (8) is a fixed cylinder. , (10) is a screw part, (11) is a screw shaft, (13) is a fitting cylinder part, (14) is a screw, (15) is a lower support piece, and (17) is a deterrent body.

Claims (4)

[Claims] 1. A connecting cylinder integrally provided with a lower part fitted to an upper inner circumference of a mounting pipe below an upper part fixed to a lower inner circumference of the pipe, and fixed to a lower lower surface of the connecting cylinder.
An upper support piece in which the fixed cylinder is drawn out downward from the center part, and a lower part that is inserted into the connecting cylinder and the fixed cylinder and extends below the lower surface of the fixed cylinder. Elastic shaft having a large head portion, a lower support piece screwed into a screw part of the screw shaft, and a central portion inserted into the fixed cylinder, and interposed between the upper and lower support pieces. A strut for connection characterized by being composed of and. 2. The lower part of the connecting cylinder and the upper and lower support pieces are
The connecting column according to claim 1, which has an outer diameter that allows fitting in a pipe, and is provided with a collar between an upper portion and a lower portion. 3. The connecting column according to claim 1, wherein upper and lower surfaces of the elastically deformable body are non-rotatably locked to locking projections provided on the upper and lower support pieces, respectively. 4. The fitting cylinder portion according to claim 1, 2 or 3, wherein a fitting cylinder portion is provided at the center of the lower support piece, the fitting cylinder portion extending upward and fitting in the fixed cylinder and having a screw hole formed in the inner circumference. Support post for connection.