JPS6332406Y2 - - Google Patents

Description

[Detailed Description of the Invention] Technical Field This invention relates to an expandable pipe device whose overall length can be freely changed.

Purpose of the invention The purpose of this invention is to be able to change the overall length of the pipe by simply pulling out or pushing it, and to automatically hold the pipe at the changed length. To provide a telescoping pipe device which can be released from a fixed state with a single touch and has a simple and durable mechanism.

Embodiment Hereinafter, an embodiment of this invention in a hanger rack will be described based on the drawings. 1st
As shown in the figure, the hanger rack of this embodiment includes a pair of first pipes 3 each having legs 1 and fixed to each other at their lower portions by connecting rods 2;
The upper portions of the pipes are connected to each other by a connecting rod 4, and a second pipe 5 is inserted in and out of the first pipe 3, respectively. A hanger (not shown) is suspended in parallel from the upper connecting rod 4.

Therefore, the first and second pipes 3 and 5 and their related structures will be explained below. As shown in FIGS. 2 and 3, the first pipe 3 includes a short lower pipe 11 that is integral with the leg 1, and a fixed pipe 12 that is externally fitted and fixed to the lower end of the lower pipe 11. It is configured. Lower pipe 1
The inner circumferential surface of 1 is a locking rod 13 having a channel-shaped cross section.
is fixed at its lower end and extends upward within the fixed pipe 12. Both ribs 13a of the locking rod 13
As is clear from FIG. 4, the intervening web 13b has one locking hole 14 located at the lower end and a plurality of locking holes 15 located above the locking hole 14 at approximately equal intervals. They are arranged in rows one above the other. Tongues 16 and 17 are integrally formed from the lower and upper edges of the locking holes 14 and 15, respectively, and extend obliquely outward, and their inner surfaces serve as cam surfaces 16a and 17a, respectively.

The locking rod 13 extends within a movable pipe 18 that is inserted into and out of the fixed pipe 12 from the upper end opening of the fixed pipe 12 . Further, a fixing nut 19 is fixed to the inner periphery of the upper end of the movable pipe 18.
A support shaft 20 extending within the movable pipe 18 is screwed into the threaded hole at the threaded portion at its upper end. A support member 21 located between both ribs 13a of the locking rod 13 is fixed to the lower end of the support shaft 20, and a locking lever 23 is rotatably supported on the support member 21 by a shaft 22. There is. The shaft 22 is connected to a locking lever 23.
When the locking lever 23 is in a free state, it is placed in the position shown by the solid line in FIGS. 2 and 3 due to its own weight, and its tip is located in the locking hole. 14 or 15. Also,
When the movable pipe 18 is raised or lowered (pulled out or pushed in), the tip of the locking lever 23 touches the tongue piece 1.
When the locking lever 23 comes into contact with the cam surfaces 16a, 17a of the locking hole 14 or 17, the locking lever 23 is rotated from the position inside the locking hole 14 or 15 as shown by the two-dot chain line in FIG. It is moved and located outside the locking hole 14 or 15.

A spring 24 is provided on the lower surface of the fixing nut 19.
is attached to the lower surface of the spring 24, and a spring receiver 25 is attached to the lower surface of the spring 24, which faces the upper end of the locking rod 13. This spring 24 does not necessarily need to be attached to the fixing nut 19, and the spring receiver 25 does not necessarily need to be attached to the spring 24. In short, the spring receiver 25 only needs to exist between the fixing nut 19 and the locking rod 13, and the spring 24 only needs to exist between the spring receiver 25 and the fixing nut 19.

Now, FIG. 2 shows that the movable pipe 18 is pushed downward, the spring receiver 25 comes into contact with the upper end of the locking rod 13, and the spring receiver 25 and the fixing nut 1
9, the spring 24 is compressed and an upward spring force is applied to the movable pipe 18. In this state, the tip of the locking lever 23 faces the locking hole 14 at the lower end, and the locking lever 23 enters the locking hole 14 due to its own weight, and is locked by the spring force of the spring 24. The locking lever 23 is held in a locked state at the upper inner peripheral edge of the locking hole 14. That is, in this state, the movable pipe 18 is fixedly held in the downwardly pushed position by the spring force of the spring 24 and the locking action between the inner upper edge of the locking hole 14 and the locking lever 23. Therefore, in this state, the movable pipe 18 cannot be moved upwards, and the lever hanger rack with the connecting rod 4 shown in FIG. 1 can be carried.

Next, when the movable pipe 18 is pushed further against the spring force of the spring 24 from the state shown in FIG. As a result of this action, the locking lever 23 is rotated to the position shown in two-dot chain line in FIG. 2, and is pulled out from the locking hole 14. For this reason, the locking lever 23
The fixed relationship between the locking rod 13 and the locking rod 13 is released, and the movable pipe 18 becomes able to move upward. In this way, the fixed state can be released by simply pushing the movable pipe 18.

Therefore, the movable pipe 18 is moved upward so that the locking lever 23 moves upward from the position of the locking hole 14 before the locking lever 23 enters into the locking hole 14 again due to its own weight. If you pull it out quickly, you can increase the overall length. Then, the locking lever 23 is placed in the locking hole 1 at an arbitrary height position.
5, if the upward movement of the movable pipe 18 is stopped, the locking lever 23 enters into the locking hole 15 due to its own weight. Therefore, as shown in FIG. 3, the lower inner edge of the locking hole 15 and the lower end surface of the locking lever 23 are locked, and this locking locks the movable pipe 18 at the desired extraction position. can be retained. Therefore, a hanger or the like can be hung from the connecting rod 4 in this state.

Next, in order to raise or lower the movable pipe 18 from this position, the movable pipe 18 is pulled up slightly in the state shown in FIG. In this way, the locking lever 23 is attached to the cam surface 17a of the tongue piece 17.
The locking lever 23 is rotated to a position where it is pulled out from the locking hole 15 by the action of the cam surface 17a. Therefore, in this state, the movable pipe 18 can be raised or lowered again, and if the movement is stopped when the locking lever 23 faces a locking hole 15 different from the locking hole 15, the same operation as described above is performed. The movable pipe 18 can be held in its rest position. Note that when passing through a position in the locking hole 15 where the locking lever 23 does not need to be locked, the locking lever 23 must be moved upward or downward from the position of the locking hole 15 before the locking lever 23 enters into the locking hole 15. The movable pipe 18 may be quickly raised or lowered so as to separate downward.

Note that this invention is not limited to the above-mentioned embodiments, and may be embodied in a telescopic pipe device other than a hanger rack, such as a coat hanging stand. Furthermore, in the embodiment described above, the locking rod 13 extends into the movable pipe 18, but
If the support shaft 20 is lengthened and the locking lever 23 is placed in a position protruding outward from the support shaft 20, the same effect as in this embodiment can be obtained even if the locking rod 13 does not extend into the movable pipe 18. can be obtained. Furthermore, in this invention, contrary to the above embodiment, the first pipe is inserted into the second pipe, the locking rod is fixed to the second pipe, and
Modifications such as providing a locking lever on the first pipe side are possible.

Effects of the invention As exemplified in the examples above, this invention allows the overall length of the pipe to be changed freely by simply pulling out or pushing the pipe, and also automatically holds the pipe fixed at the changed length. Furthermore, the fixing and releasing from the fixed state can be performed with a single touch, and the structure for this purpose can be made simple and durable.

[Brief explanation of the drawing]

The drawings show an embodiment of this invention, in which Fig. 1 is a perspective view showing the entire hanger rack, Figs. 2 and 3 are sectional views of main parts showing the expanded and contracted state of the pipe, respectively. FIG. 4 is a partially omitted perspective view of the locking rod. First pipe...3, Second pipe...5, Locking rod...13, Locking hole...14, 15, Cam surface...
...16a, 17a, locking lever...23, spring...24.

Claims (1)

[Claims for Utility Model Registration] 1. A first pipe 3, a second pipe 5 inserted into and out of the first pipe 3, and one pipe 3 of the two pipes 3 and 5.
or the locking part 14 provided inside the pipe 5 and the other pipe 5 or 3, and is movable between a position where it locks with the locking part 14 and a position away from it, and is capable of moving under its own weight. The locking member 23 is biased in the locking direction by the locking member 23; When the locking member 23 is locked in the locking portion 14, the extension between the pipes 3 and 5 is prevented; and the locking portion 14 Cam surface 1 located near
6a, and its cam surface 16a is locked to this cam surface 16a when a force in the shortening direction is applied between both pipes 3 and 5 while the locking member 23 is locked to the locking portion 14. A spring that acts so that the member 23 comes into contact and is moved in the unlocking direction, and a spring that biases both pipes 3 and 5 in the extension direction when the locking member 23 and the locking portion 14 are locked. An expandable pipe device characterized by comprising: 24. 2. The first pipe 3 has a locking rod 13 extending in the longitudinal direction inside thereof, and the locking portion 14 is a locking hole 14 transparently provided in the locking rod 13. The expandable pipe device according to item 1. 3 The second pipe 5 has a longitudinally extending support shaft 20 in its interior, and a locking member 2
The telescopic pipe device according to claim 2, wherein 3 is a locking lever rotatably supported at the tip of the support shaft 20.