JPH0612811U - Structure of telescopic pipe - Google Patents

Abstract

(57) [Summary] [Object] The present invention relates to a structure of an expandable pipe suitable for a curtain rail, a projecting rod, etc., and is to constantly expand and contract the expandable pipe at a constant pitch. [Structure] The present invention comprises a spiral-shaped outer pipe 1 having a required length and an inner pipe 9 having a similar shape, which is stretchably screwed. [Effect] Since the telescopic pipe can be always telescopically operated, the telescopic speed can be adjusted properly to prevent accidental withdrawal.
The amount of expansion and contraction can be adjusted for each constant pitch, and the mounting work can be performed very easily. Further, since both the inner and outer pipes 1 and 9 are formed in a spiral shape, they have a good appearance and are extremely decorative.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a structure of a telescopic pipe suitable for a cart rail, a punching bar, a clothes rod, and the like.

[0002]

[Prior art]

 Conventionally, this type of expandable pipe has a structure in which an inner pipe of a similar shape is elastically inserted into an outer pipe having a required length formed of a round pipe or a square pipe (Actual Publication No. 45- 1398).

[0003]

[Problems to be solved by the device]

 The conventional expansion / contraction pipe configured as described above can perform the expansion / contraction operation extremely smoothly, but it cannot perform the expansion / contraction operation at constant pitches, so the expansion / contraction amount can be finely adjusted during mounting. It was difficult to do. Also, since the expansion and contraction operation can be done smoothly, there was a risk that the inner pipe would pull out during handling and cause an unexpected accident. In addition, the inner and outer pipes were formed from extremely common round pipes and square pipes, so they had a very poor appearance and lacked decorativeness.

The present invention solves all the problems of the prior art, and only expands and contracts at a constant pitch to properly adjust the expansion and contraction speed and effectively prevent accidental extraction. In other words, the present invention aims to provide a structure of a stretchable pipe which is capable of adjusting the stretch amount for each constant pitch and which has a very beautiful appearance and is rich in decorativeness.

[0005]

[Means for Solving the Problems]

 That is, the present invention comprises a spiral outer pipe 1 having a required length and an inner pipe 9 of a similar shape, which is stretchably screwed.

[0006]

[Action]

 According to this invention, the expansion and contraction operation can be performed peristally at a constant pitch.

[0007]

【Example】

 An embodiment of the present invention shown in the drawings will be described below. Reference numeral 1 is an outer pipe formed in a spiral shape at a constant pitch and having a required length, 2 is a cap body with a head 3 rotatably fitted to one end of the outer pipe 1, and the cap is provided. The body 2 is always urged outward through the urging spring 4, and its stopper 5 restricts its withdrawal. Reference numeral 6 denotes an annular groove formed on the outer periphery of the head portion 3 of the cap body 2 for locking a fitting, 7 denotes a mounting hole for nails or the like formed in the head portion 3 orthogonal to the center line of the cap body 2, 8 Is an elastic anti-slip member that is planted on the top surface of the head 3.

Reference numeral 9 denotes a spiral inner pipe having a similar shape and screwed to the outer pipe 1 so as to be capable of expanding and contracting. Reference numeral 10 denotes a holder for a locking ball, which is inserted into a tip portion of the inner pipe 9, and 11 Is a holding hole formed in the outward projecting portion of the holder 10 so as to be orthogonal to the center line of the inner pipe 9, 12 is a steel engaging ball loosely mounted in the holding hole 11, 13 Is a screw hole formed at the base end of the holder 10 along the center line of the inner pipe 9 so as to communicate with the holding hole 11. Reference numeral 14 denotes a cap body with a head portion 15 rotatably fitted to the rear end portion of the inner pipe 9, and reference numerals 16, 17, 18 denote annular grooves formed in the head portion 15 and mounting holes. And a non-slip member. Reference numeral 19 is an operating shaft with a screw portion 20 provided on the cap body 14 so as to be screwed into the screw hole 13 of the holder 10 along the center line of the inner pipe 9.

Next, the operation of the above embodiment will be described. First, the base end of the holder 10 is inserted into the free end of the inner pipe 9, and then the inner pipe 9 is pushed toward the outer pipe 1. Then, both the inner and outer pipes 1 and 9 are formed in a spiral shape with a constant pitch, so that the inner pipe 9 is threaded along the inner peripheral surface of the outer pipe 1 and fits peristally. Then, the inner pipe 9 is screwed in according to a predetermined mounting dimension and finely adjusted by unscrewing it, and then the cap body 14 of the inner pipe 9 is rotated in a predetermined direction to rotate the operating shaft 19. The screw portion 20 is screwed into the screw hole 13 of the holder 10. Then, as the actuating shaft 19 rotates, the tip of the threaded portion 20 enters into the holding hole 11 to gradually push the locking ball 12 outward, and press it against the inner peripheral surface of the outer pipe 1. The inner pipe 9 is securely fixed to the outer pipe 1 by the pressure contact of the locking ball 12. On the contrary, when the fixing is released, the cap body 14 may be rotated in the opposite direction and the screw portion 20 of the actuating shaft 19 may be unscrewed to release the press contact of the locking ball 12.

[0010]

[Effect of device]

 According to this invention, since the inner pipe 9 having a similar shape is telescopically screwed into the spiral outer pipe 1 having the required length, the telescopic pipe is always peristaltic at a constant pitch. The telescopic speed can be adjusted appropriately, and not only can accidental extraction be effectively prevented, but also the amount of expansion and contraction can be adjusted at regular pitches. The installation work can be performed very easily. Further, since the inner and outer pipes 1 and 9 are formed in a spiral shape, they have a much better appearance and are more decorative than conventional products made of round pipes or square pipes.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing an embodiment of the present invention.

FIG. 2 is a vertical sectional view showing an operating state.

FIG. 3 is a partially enlarged sectional view showing a fixed state of an inner pipe 9.

[Explanation of symbols]

 1 Outer pipe 9 Inner pipe

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[Procedure amendment]

[Submission date] August 3, 1993

[Procedure Amendment 1]

[Document name to be corrected] Drawing

[Correction target item name] All drawings

[Correction method] Change

[Correction content]

[Fig. 2]

[Figure 3]

[Figure 1]

Claims (1)

[Scope of utility model registration request] 1. A structure of a telescopic pipe, characterized in that an inner pipe 9 having a similar shape is screwed into a spiral outer pipe 1 having a required length so as to be telescopic.