JPH0255100A - Expandable pole for stretched span - Google Patents

Abstract

PURPOSE:To enable a pole to be easily and accurately mounted in a stretchedly spanning position by a method wherein a protrusion shaft resiliently actuated for protrusion through operation of a press button is mounted to the one end of the pole. CONSTITUTION:A cap 15 for pressure contact on the outer pipe 11 side is properly pressed against a position on a wall surface 6, and meanwhile, a cap 14 on the inner pipe side is held fronting on a position, where pressure contact is estimated, on the wall surface 6 to press a press button 31. In which case, simultaneously with sink down of the press button 31 in a button hole 30 of a sleeve 21, through the action of a spring 25 for protrusion, a protrusion shaft 22 is actuated for outward protrusion from on inner pipe 12, and the cap 14 for pressure contact is forced into contact with a wall surface. Resulting from this operation, a compression force in the direction of an axis is exerted on the whole of a pole against the force of the spring 25 for protrusion, and backward movement of an inner pipe 12 is blocked by a lock mechanism 16, whereby the pole is brought into a stretched state and is positioned in a stretched state between the two walls 6 and 6.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention can be used, for example, as a general clothes drying rod, or it can be installed in a suspended state between both side walls of a bathroom or hallway, or between pillars, to dry clothes. The present invention relates to a telescopic pole for tensioning racks used for support rods for shelves, clothes hangers, shower curtain rails, partition curtain rails, etc.

2. Description of the Related Art In general, this type of telescopic pole for tensioning, as shown in FIG. 6, has an inner tube (2) slidably and rotatably inserted into an outer tube (1). A rotary operation tool (3) for fine length adjustment is attached to the end of the outer tube (1), and press caps (4) (4) made of rubber or the like are fitted to both ends. A locking mechanism (5) is provided at the insertion portion of the tubes (1) and (2). When in use, both caps (
4) By setting the overall length so that the inner tube (2) is in approximate contact with the outer tube (1), the inner tube (2) is rotated relative to the outer tube (1), and the outer tube ( 1) and the inner tube (2) are fixed in a non-slidable manner, and then by rotating the rotary operating tool (3) to the extension side, both ends are connected to the opposing wall surface (6) (6).
It is constructed so that it is pressed into tension with the
For example, Utility Model Application Publication No. 60-8503).

Problems to be Solved by the Invention However, in the conventional products as described above, during the tension installation operation, the rotation operation of the rotation operation tool is performed with the pressure contact cap at one end pressed against one of the opposing walls. Since the other cap must be pressed against the wall surface, the position where the cap is pressed often shifts when the rotary operating tool is rotated, making it difficult to erect the pole horizontally at the correct planned position. There was a problem. Furthermore, since this type of pole is often erected at a high place, it is not only difficult to perform the above-mentioned work, but it is also difficult for women and others who are not strong enough to achieve a secure fixation with a sufficiently strong pressing force. It was difficult to do so, and it was not uncommon for the external force applied during use to shift the mounting position or cause the pole itself to fall off.

In view of the above-mentioned problems of the prior art, the present invention has been developed to enable easy and reliable installation work even at high locations, to easily install a rack at an accurate planned position, and to provide a flexible structure that can be expanded and contracted easily. The purpose is to provide poles.

Means for Solving the Problems In order to achieve the above-mentioned object, the present invention provides a protruding shaft at one end of the pole that is elastically protruded by pressing a button, so that erection work can be instantaneously performed.

That is, in this invention, the inner tube is slidably inserted into the outer tube,
In the telescopic pole for tensioning, which is provided with pressure-welding caps at both ends, a sleeve is inserted and fixed into the outer end of the outer tube or the inner tube, and a protruding shaft with the cap attached to the tip is inserted into the sleeve. An ejecting spring is provided which is slidably inserted in the axial direction and always biases the protruding shaft in the protruding direction, and a spring is provided in the intermediate portion of the length of the protruding shaft at a position within the sleeve in the protruding direction. An energized stopper/push button is provided so as to be freely protrusive and retractable in the radial direction of the protruding shaft, and at the position where the protruding shaft is most retracted into the sleeve, the stopper/push button is attached to the peripheral wall of the sleeve and the inner or outer pipe. The push button is configured to slightly protrude outward from the drilled button hole to prevent the protruding shaft from protruding, and to allow the protruding shaft to protrude by pushing the push button through the button hole into the sleeve. The gist is a telescopic pole for tensioning.

In addition, when the push button is pressed and the protruding shaft is operated to protrude, the protruding shaft is equipped with the above-mentioned ejecting spring in order to prevent the protruding shaft from accidentally jumping out of the tube or being damaged by strong impact. Separately, it is preferable to equip a spring for preventing removal and for buffering, which has a sufficiently weaker spring force than the spring for ejection, to counteract this.

When the operating protrusion is in the retracted state, the push button is fitted into the button hole of the sleeve and the inner or outer tube, which acts as a stopper and prevents the protrusion of the protrusion. When installing the tension rack, adjust the total length of the pole to be slightly shorter than the distance between the opposing walls by relative sliding of the inner and outer tubes, then press one cap against one of the opposing walls, and then press the other cap against the opposite wall. Push in the push button with the cap properly facing the intended pressure contact position on the other wall. Then, the projecting shaft projects due to the action of the projecting spring, and the cap at the tip of the shaft instantly comes into pressure contact with the wall surface, thereby achieving a predetermined tensioned construction state.

Embodiment FIGS. 1 to 5 show a preferred embodiment of the present invention.

In the figure, (11) shows the outer tube, (12) the inner tube, (13) the ejecting mechanism for tensioning, (14) and (15) the pressure caps at both ends, and (1B) the locking mechanism.

Both the inner and outer tubes (11) and (12) are made of aluminum tubes with painted surfaces, and have different diameters and are fitted snugly into each other so as to be able to freely slide relative to each other.

That is, the inner tube (12) is inserted into the outer tube (11).

The locking mechanism (IB) for adjusting the length of the pole is the inner tube (12
) is equipped on the insertion side end. The locking mechanism (1B)
The plug (17), which is made of resin and has a substantially U-shaped cross section, is press-fitted and fixed to the end of the inner pipe (12), and the plug (17) is inserted loosely through the center of the end wall of the plug (17) in the axial direction. It consists of a mounting shaft (18) that is slidably mounted on the mounting shaft (18), and a locking plate (19) and a support plate (20) that are fixedly mounted on the distal end of the mounting shaft (18) by caulking the shaft end. As shown in FIGS. 1 and 4, the locking plate (19) consists of a dish-shaped disc made of thin steel plate having a total of four notches (19a) extending in the radial direction from the periphery. By having a notch (19a) and a concave dish shape, it can be expanded and contracted to reduce its outer diameter when pressure is applied from the outer circumferential surface, and the mounting shaft ( 18). On the other hand, the support plate (20) is used as a backup for the locking plate (19), and is made of a rigid metal disc with a diameter smaller than that of the locking plate. It is integrally fixed to the mounting shaft (18) together with the locking plate. Therefore, the locking mechanism (
IB) is movable within the outer tube (11) in the direction in which the inner tube (12) is pulled out, but the locking plate (19) is movable in the opposite direction.
The periphery of the outer tube (11) is bitten into the inner surface of the outer tube (11) and locked, thereby realizing a movement-preventing state. In addition, the locking plate (19) and the support plate (20) have a predetermined distance, e.g. ! They are installed in such a manner that they are spaced apart by approximately m. Therefore, when pulling out the inner tube (12) from the outer tube (11), the above-mentioned interval is maintained to allow the locking plate (19) to move smoothly within the outer tube (11), while the inner tube ( 12) in the insertion direction, move the plug (1) as shown in Figure 3.
7) hits the support plate (20), the locking plate (19)
) from the rear side, thereby making it possible to perform the initial locking action of the locking Vil (19) more reliably.

The protruding mechanism (13), which is an important part of this invention, adjusts the length of the pole to be slightly shorter than the distance between the opposing wall surfaces (6) (6), and then When the frame is stretched, one end is elastically protruded to press the caps (14, 15) against the walls (6, 6), and as shown in the figure, the inner tube (12) or the outer end of the outer tube (11).

In the illustrated embodiment, the ejecting mechanism (13) includes an inner tube (1
A sleeve (21) made of synthetic resin is tightly inserted and fixed into the end of the sleeve (2), and a projection made of synthetic resin is inserted into the sleeve (21) so as to be slidable in the axial direction. shaft(
22). Both of them have a pair of anti-rotation pieces (23) protruding from both sides of the middle part of the length of the protruding shaft (22).
(23) is a groove-shaped slit (24) formed from the tip of the sleeve (21) to the middle part (
(see FIG. 5), so that they are combined so that they cannot rotate relative to each other.

Further, a pressure contact cap (14) on the inner tube (12) side is removably attached to one end of the protruding shaft (22) by tightly fitting its protruding tail (14a). Outer tube (
11) side cap (15) also has its protruding tail (1
5a) is removably attached to the outer tube (11) by tightly fitting it to the tube end. and the cap (15)
An air hole (15b) is opened in the outer tube (11) to communicate between the inside and outside of the outer tube (11).

At the rear of the protruding shaft (22) is a protruding spring (25).
A spring (26) for preventing removal and for buffering is provided.

That is, the ejecting spring (25) is connected to the spring receiving part (27) provided at the middle of the length of the ejecting shaft (22) and the sleeve (22).
1) is interposed in a compressed state between the sleeve ( 21)
Retaining ring (28) on the rear wall and the tail end of the protruding shaft (22)
The protruding shaft (22) is interposed between the protruding shaft (22) and the protruding shaft (22) in the retracting direction. Moreover, both springs (25) (2
B) are both made of coil springs, but the former (25)
is set to have a sufficiently stronger spring force than the latter (2B), so even if these spring forces cancel out, the projecting shaft (22) is always attached in the projecting direction, that is, in the left direction in Figure 2. It is assumed that power acts in a dominant manner.

A buttonhole (29) is bored at a position near the end of the inner tube (12), and the sleeve (21) also has a bulge on its periphery fitted to the buttonhole (29). A button hole (30) is provided in a mating manner.

And a stopper/push button (
31) fits into the button holes (29) and (30) and projects outward at the position where the protruding shaft (22) is most retracted into the inner tube (12).

The stopper/push button (31) has its base slidably held in a circular hole (32) formed by penetrating the protruding shaft (22) in the diametrical direction, and has a base that is slidably held in a circular hole (32) formed by penetrating the protruding shaft (22) in the diametrical direction. It is normally biased in the projecting direction by a push-up spring (33) fitted in the. Then press the button (31)
When the button is stuck in the button hole (3G),
This functions as a stopper to prevent the protruding shaft (22) from advancing.

The usage and operation of the telescopic pole according to the above embodiment are as follows.

In the process of putting it into actual use, as shown in Figure 2, the inner tube (12) is inserted into the outer tube (11) at its deepest point, and the protruding shaft (22) of the ejecting mechanism (13) is also retracted. It is handled in its shortest form.

Therefore, in use, depending on the distance between the opposing walls (6) (6) where the tension rack is to be installed, the inner tube (12) should be connected to the outer tube (11) until the length is a little shorter than that. ) and stretch it. This drawer operation is performed using the locking plate (19).
The outer tube (1
This can be done freely while sliding in contact with the inner surface of 1).

Next, in the above-mentioned extended state, one pressure contact cap (15) on the outer tube (11) side is correctly positioned and pressed to a predetermined position on the wall surface (6), while the other inner cap (15) is pressed while looking at the horizontal direction of the pole. Hold the tube-side cap (14) in a position directly facing the planned press-contact position of the other wall surface (6), and press the push button (31). Then, press the button (3
1) sinks into the button hole (30) of the sleeve (21), and at the same time, the protruding shaft (22)
) is operated to protrude outward from the inner tube (12), and as shown in FIG. 3, the pressure contact cap (14) at its tip abuts against the wall surface. As a result, a compressive force in the axial direction is applied to the entire pole in a manner that opposes the force of the ejecting spring (25).
) comes into pressure contact with the support plate (20), and along with this, the locking plate (1
The peripheral edge of the pole (9) bites into the inner surface of the outer tube (11) and is locked to prevent the inner tube (12) from moving in the retracting direction. 6,) (
6) A tension frame is installed between the two. In this installed state, the pole is used, for example, as a shower curtain rail in a bathroom, as a rod for hanging towels, clothes, etc., or as a support rod for an article shelf.

In addition, if the inner tube (12) is pulled out excessively by mistake during the above-mentioned stretching operation performed before tensioning, the inner tube (12)
12) can no longer be moved as it is due to the reverse check function of the locking mechanism (1B). Therefore, in this case, once the inner tube (12) is completely pulled out from the outer tube (11), both caps (14) (
15), reinsert the inner tube (12) into the outer tube (11) from one end, and then remove the caps (14) and (15).
Attachment is performed to restore the initial shortened state, and the above-mentioned expansion operation is performed again. For such restoration,
The cap (15) on the outer tube (11) side needs to be removable, but the cap (14) on the inner tube (12) side has a diameter that allows it to be inserted into the outer tube (11). It does not necessarily have to be removable.

Furthermore, in order to check the protrusion operating state of the protruding shaft (22), a so-called empty ejecting operation was performed in which the push button (31) was pressed to protrude the protruding shaft (22) without directing the cap (14) toward the wall (6). This is often done before use. In this case, if there is no buffer spring (26), the ring (28) at the rear end of the protrusion shaft (22) will be moved by the force of the ejection spring (25).
may collide with the rear end surface of the sleeve (21) with a strong force and damage them, and if the ring (28) is not provided, the protruding shaft (22) may jump out of the sleeve (21). obtain. Spring for preventing removal and buffering (26)
works effectively to avoid such situations from occurring. That is, the protruding operation range of the protruding shaft (22) is
(2B) The force is limited to a balanced position, and a buffering effect is provided near the limit of the ejection operation to prevent a large impact from occurring. In addition, a protruding protruding shaft (22
) When the sleeve (21) is pushed into the sleeve (21) again to restore its original shape, the spring force of the ejecting spring (25) is canceled out, thereby effectively functioning to reduce the force required for the restoration process.

In the embodiment, both the inner and outer tubes (11) and (12) are made of aluminum tubes, but they may also be made of steel tubes, synthetic resin tubes, etc. In addition to strength requirements, it is preferable that at least the outer tube (11) is made of an aluminum tube in order to ensure a locking effect on the locking plate (19).

Effects of the Invention The telescopic pole according to the present invention can cause the protruding shaft to project instantaneously by pressing the push button as described above, and the cap can be brought into contact with the wall surface by pressure, so that it is possible to press the cap against the wall surface. Erection work under tension can be performed extremely easily. Therefore, installation at a high place can be easily performed, and the installation position can be easily and correctly set at the planned position. In addition, during erection, the necessary sufficient tension force is obtained by the force of the ejection spring, making the installation condition sufficiently strong and eliminating concerns about misalignment or falling off during use. I can do it. In addition, by inserting the protruding shaft into the sleeve, it is possible to smoothly advance and retract the protruding shaft, and it is also possible to assemble the ejecting mechanism and assemble it to the pipe easily. be able to.

Furthermore, by providing a buffer spring in opposition to the ejecting spring, there is no risk of failure, damage, etc. occurring when the protruding shaft is ejected idly as described above.

[Brief explanation of the drawing]

Figures 1 to 5 show an embodiment of this invention, with Figure 1 being an exploded perspective view showing the components in a separated state, and Figure 2 being a longitudinal cross-section in the assembled state and in the shortened state before use. FIG. 3 is a longitudinal sectional view of the tension rack installed and in use, FIG. 4 is a perspective view of the locking mechanism, and FIG. 5 is a sectional view taken along the line v-V in FIG. 2. FIG. 6 is a schematic side view showing the conventional product in a state in which it is installed on a tension rack. (11)...outer tube, (12)...inner tube, (13)...
・・Ejecting mechanism, (14) (15) ・・Cap for pressure welding, (21) ・・・Sleeve, (22) ・・・Protruding shaft, (25) ・・・・ Spring for ejecting, (26) ・・・- Pull-out prevention/buffer spring, (29) (3G)...button hole, (31)...push button, (33)...push-up spring. that's all

Claims (2)

[Claims] (1) In an extensible tensioning pole in which an inner tube is slidably inserted into an outer tube and caps for pressure contact are provided at both ends, a sleeve is inserted and fixed into the outer end of the outer tube or the inner tube. A protruding shaft having the cap attached to the tip thereof is inserted into the sleeve so as to be slidable in the axial direction, and is provided with an ejecting spring that constantly biases the protruding shaft in the protruding direction;
A stopper/push button, which is biased by a spring in the protruding direction, is provided in the middle of the length of the protruding shaft at a position inside the sleeve so as to be able to freely move in and out in the radial direction of the protruding shaft. In the inserted position, the stopper/push button slightly protrudes outward from the button hole bored in the sleeve and the peripheral wall of the inner tube or the outer tube to prevent the protrusion operation of the protruding shaft, and the push button is removed from the sleeve from the button hole. A telescopic pole for tensioning that is configured to allow the protruding shaft to protrude by being pushed inward. (2) The telescopic pole for tensioning according to claim 1, wherein the protruding shaft is equipped with a spring for preventing removal and for buffering, which has a weaker spring force than the ejecting spring, in opposition to the ejecting spring.