JPH0634483Y2 - Support device for prop - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a column joint device used as a column for tents and other temporary buildings and as an interior column.

[Conventional technology]

Conventionally, for this type of strut joint, when two pipe pillars are screwed together, one pipe pillar is threaded, and the other end of the pipe pillar is also threaded so that both threaded portions are screwed. When connecting by screwing, also attach the outer jacket to the end of the pipe column,
It is generally known that the outer jacket is threaded and screwed into a threaded portion formed at the end of another tube.

[Problems to be solved by the device]

Of the ones described in the prior art, the threaded portion of the tube column to be inserted is always exposed to the outside, so rusting or damage causes screwing failure, and the screwing operation is distorted. There was a problem of instability as a pillar.

Therefore, the present invention has been made in view of the above-mentioned problems of the related art, and the purpose thereof is to simply and reliably fix one pipe by twisting one pipe and to fix the inside of the pipe. Therefore, it is an object of the present invention to provide a compact joint device for a pillar, which is excellent in appearance as a pillar of a tent or a temporary building or the like, and a pillar for an interior because it utilizes the frictional force.

[Means for Solving the Problems]

In order to achieve the above object, the pillar in the present invention is a pipe pillar or pipe, and is divided into an upper pipe and a lower pipe,
The lower pipe has a large inner diameter and a large inner diameter, and a resin grip having a part protruding is fitted to the upper end portion. The upper pipe has a small inner and outer diameter and is a pipe column that can be fitted into the lower pipe. An eccentric T-shaped supporting shaft is welded and hung on the lower end portion of the upper pipe. A ring is loosely attached, a thick portion and a thin portion are provided on the circumference of the eccentric ring, a step portion is formed on the lower circumference of the thin portion side, and the base end is welded to that portion. A leaf spring having an elastic force is attached to the outside.

In addition, an uneven surface is formed on the circumference of the eccentric ring so as to contact the inner surface of the lower pipe to increase the frictional force so that the upper and lower pipes are securely fixed.

[Action]

Since the outer diameter of the upper pipe is smaller than the inner diameter of the lower pipe, it is inserted into the lower pipe together with the eccentric ring of the upper pipe. This insertion adjustment is made in response to the height to be used as a pipe column, and when the height is determined, the T-shaped spindle is twisted about 1/8 turn and By pressing the eccentric ring together with the leaf spring on the inner surface of the lower pipe, the entire peripheral surface of the eccentric ring is tightly fixed to the inner wall of the lower pipe. Next, when pulling out the upper pipe or adjusting the height, the T-shaped support shaft is reversed by about 1/8.

Then, in this case, the elastic force of the leaf spring of the eccentric ring acts to restore.

〔Example〕

1 to 5, the upper pipe (A) has a smaller outer diameter than the lower pipe (B) and can be fitted into the lower pipe (B). Is formed in. The lower pipe of the upper pipe (A) has a locking disc (2) and is circular and welded with the T-shaped support shaft (1) eccentric as a whole. An eccentric ring (4) having a step portion (3) by cutting a part of a lower end portion is fitted on the support shaft (1), and a thick portion is formed on the ring (4). By forming the thin portion, a contact portion and a gap portion are formed between the inner surface of the eccentric ring (4) and the T-shaped support shaft (1). Then, the base end of the leaf spring (5) is welded to the cutting portion facing the thin portion forming the stepped portion (3) so as to have an elastic force, and is bulged outward so as to gradually move away along the circumference of the cutting portion. Contact the inner surface of the lower pipe (B). (6) is a resin grip, which is formed so as to project upward from the upper end of the lower pipe (B) and straddle the upper pipe (A).

In FIG. 5, a concave-convex surface (7) is formed on the outer peripheral surface of the eccentric ring (4) so that the eccentric ring (4) comes into contact with the inner surface of the lower pipe (B) and the frictional resistance is increased to fix the ring.

[Effect of device]

Since the present invention is configured as described above, it has the following effects.

(1) Since the upper pipe and the lower pipe are detachably formed, the external appearance is simple, and it can be made compact, and can be freely assembled as a pipe column.

(2) The upper pipe is twisted and fixed by turning the T-shaped support shaft at about 1/8 rotation, and the tightening force is strong so that no deviation occurs.

(3) Since the frictional force between the inner surfaces of the pipes is used, there is no possibility that the surface treatment of the outer surface will be damaged.

(4) Since the diameter of the lower part of the pipe is large, it has stability when used for a structure.

(5) The lengths of the upper and lower pipes can be finely adjusted, which is convenient for use as a pipe column, and the fixed portion is built in the pipe as described above, so that it is free from any external impact. Not damaged.

[Brief description of drawings]

FIG. 1 is a partially cutaway front view of the device of the present invention, FIG. 2 is a sectional view taken along line XX of FIG. 1, and FIG. 3 shows a state in which an eccentric ring is fixed by rotating a T-shaped support. FIG. 4 is an explanatory view showing the eccentric ring of the present invention, and FIG. 5 is a side view of the eccentric ring of the present invention. 1 ... T-shaped support shaft, 2 ... Locking disc 3 ... Step, 4 ... Eccentric ring 5 ... Leaf spring, 6 ... Resin grip 7 ... Uneven surface, A ... Upper pipe B ...... Lower pipe

Claims (1)

[Scope of utility model registration request] 1. When connecting upper and lower pipe columns having different inner and outer diameters, a T-shaped support shaft having a cross section having a locking disk is eccentrically welded downwardly on the lower end surface of the upper pipe, and eccentric to the support shaft. A ring is fitted, a step is cut down on the periphery of the lower end of the eccentric ring, the base end of a leaf spring having elasticity is welded to the step, and the other end is placed along the circumference of the ring. Strut joint device configured to project outward