JPH07313313A - Expansion pipe device - Google Patents

Abstract

PURPOSE:To provide an expansion pipe device consisting of an inner pipe and an outer pipe, which can be moved without varying a fixing point of the pipes. CONSTITUTION:A supporting member 47 having a supporting surface 47a, the diameter of which expands downwardly from the upper end thereof, is provided at the lower end of a shaft member 46 which is held always at a predetermined position by a spring member 49 incorporate into an inner pipe 4 adapted to vertically move in an outer pipe 3 and which is lowered by pressing the spring member 49 while the member 47 supports a spherical body 50 interposed in a gap between the pipe 3 and the pipe 4. When the member 46 is lowered by pressing it, compressive contact between the pipes 3, 4 by means of the body 50 is removed and hence the pipe 4 is made vertically movable with respect to the pipe 3, while under conditions that the spring member 49 is functioning, the pipe 3 and the pipe 4 are brought into compressive contact by the body 50 to hold the pipe 4 at a predetermined height with respect to the pipe 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a telescopic pipe device used for hanging clothes for hanging clothes for display.

[0002]

2. Description of the Related Art For example, for hanging clothes,
It consists of an outer pipe and an inner pipe that slides up and down in the outer pipe, and a plurality of spheres are evenly present inside the outer pipe to form these spheres in the gap formed between the outer pipe and the inner pipe. There is known a telescopic pipe device having a structure in which the inner pipe is fixed at an arbitrary telescopic position by forcibly fitting and pressing a spherical body against the inner peripheral surface of the outer pipe. Among these known expansion / contraction pipe devices, a single type expansion / contraction pipe device composed of a single expansion / contraction pipe by a pair of an outer pipe and an inner pipe is disclosed in, for example, Japanese Utility Model Publication No. 54-32477, and the above expansion / contraction device. A side-by-side type expansion and contraction pipe device in which a pair of pipes are arranged side by side and mutual expansion and contraction pipes are connected by a horizontal pipe to move each inner pipe up and down is disclosed in Japanese Utility Model Publication 57-27336.
Japanese Patent Publication No. 57-28568.

[0003]

The telescopic pipe devices disclosed in these publications have a load (load) such as clothes on the inner pipe when the inner pipe is fixed to the outer pipe.
If it is applied, it can be sufficiently supported. However, when the inner pipe in a fixed state is grasped and lifted upward for the purpose of laterally moving the entire telescopic pipe device, the spherical body that comes into pressure contact with the inner peripheral surface of the outer pipe rotates and the pressure contact force decreases, As a result, there is a problem that the inner pipe slides in the outer pipe and the fixing position changes, and in some cases, the slide may cause the inner pipe to separate from the outer pipe, resulting in extremely unstable fixing.
Therefore, the conventional telescopic pipe device is inevitably moved while holding the outer pipe or the supporting legs provided at the lower end of the outer pipe without moving the inner pipe when moving. There was a problem to be solved for practical purposes, such as inconvenience.

In view of such a present situation, the present invention, regardless of whether it is a single type or a side-by-side type in the telescopic pipe device, can be considered as an inner pipe even if only the inner pipe or only the lateral pipe connecting the inner pipes is lifted. It is intended to provide a telescopic pipe device in which the fixed position of the outer pipe does not change and the inner pipe does not separate from the outer pipe.

[0005]

In order to achieve the above object, the telescopic pipe device of the present invention has a predetermined rise with respect to the inner pipe by a spring member built in the inner pipe that slides up and down in the outer pipe. A shaft member that holds the position and descends by pressing is provided, a support member having a support surface that expands downward from the upper end is provided at the lower end of this shaft member, and the lower end of the inner pipe extends along the axial direction. A slit is formed in the inner pipe, and a guide groove formed by inclining outward from the lower end in an upward gradient is formed on the outer peripheral portion of the guide member in which the slit and the through hole through which the shaft member penetrates are provided in the central portion. The guide member is fixed in a corresponding state, the sphere existing in the guide groove is supported from below by the support surface of the support member, and the support member pushes the sphere along the guide groove by the elevation of the shaft member. Raise and press the sphere protruding from the slit to the inner peripheral surface of the outer pipe, and lower the cam rod to release the pressure contact between the sphere and the inner peripheral surface of the outer pipe, allowing the inner pipe to move up and down relative to the outer pipe. It is characterized by

In the present invention, the telescopic pipe constituting the telescopic pipe device has an outer pipe having an upper end portion having a predetermined diameter and length, and an outer diameter capable of moving up and down in contact with the outer pipe. It is composed of an inner pipe having a predetermined length, and a pair of slits are formed along the axial direction so as to be offset to one outer circumference of the lower end portion of the inner pipe. Also,
In the lower end of the inner pipe, a guide member having a guide groove inclined upward from the lower end toward the outside and having a through hole for allowing the shaft member to penetrate therethrough is provided at the center of the guide member. It is fixed with the groove corresponding to the slit.

The lower end of the shaft member incorporated in the inner pipe projects through the through hole formed in the guide member,
A supporting member is integrally attached to the protruding end. The support member has a support surface that expands downward from the upper end, but the support surface may be linear or curved and is not particularly limited. Also, the shaft member,
It is always biased upward by a spring member mounted on the guide member, and its upward movement is limited by the support member contacting the guide member.

The shaft member installed in the inner pipe has a tip portion protruding from the upper end portion of the inner pipe, and an operating member is integrally provided on the protruding portion, and the operating member is pressed by a finger to rotate the shaft member. Even if the member is pushed down against the urging force of the spring member, or the tip of the shaft member is integrally provided with a hemispherical contactor at the tip, and the contactor is always provided in the inner pipe. A cam member that abuts may be rotatably mounted, and the shaft member may be moved up and down by rotating the cam member by operating the cam member from the outside of the inner pipe.

Further, the telescopic pipe device of the present invention comprises a single telescopic pipe formed by a pair of an inner pipe and an outer pipe, or a pair of telescopic pipes formed by a pair of an inner pipe and an outer pipe. It is connected and integrated by a horizontal pipe.

[0010]

The telescopic pipe device of the present invention is a support member having a support surface which is downwardly expanded from the upper end integrally provided at the lower end of the shaft member by the vertical movement of the shaft member mounted in the inner pipe. It supports a sphere that moves between the guide groove and the slit, and the vertical movement of the shaft member causes a part of the sphere to be pressed against the inner peripheral surface of the outer pipe, or the pressure contact is released to move the inner pipe to the outer pipe. Hold at a predetermined height,
Alternatively, it can be moved vertically. Also,
The expanding surface of the support member ensures that the sphere is pressed against the inner peripheral surface of the outer pipe when the inner pipe is lifted upward. Prevent it from coming out of the pipe.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the expandable pipe device of the present invention will be specifically described below with reference to the accompanying drawings. The telescopic pipe device 1 shown in FIG. 1 is a hanger hook configured by a single telescopic pipe 2, and the telescopic pipe device 11 shown in FIG. 2 is a hanger hook configured by a pair of telescopic pipes 2, 2. .

In FIG. 1, a telescopic pipe 2 is composed of an outer pipe 3 having a predetermined diameter and length with an open upper end, and an inner pipe 4 which is fitted into the upper pipe opening of the outer pipe 3 and slides up and down. The leg member 5 having the casters 6 crossed in a cross shape is attached to the lower end of the outer pipe 3, and the arm members 7, 7 for hooking the hanger are attached to the inner pipe 4. . In the figure, 8 is a display plate attached to the upper end of the inner pipe 4, and 9 is an operation member for fixing the inner pipe 4 to a predetermined position with respect to the outer pipe 3 or allowing it to slide.

In FIG. 2, a pair of telescopic pipes 2, 2
Each of which is composed of an outer pipe 3 having a predetermined diameter and length with an open upper end, and an inner pipe 4 which is fitted from the upper end opening of the outer pipe 3 and slides up and down. A leg member 5a having casters 6 is attached to the lower end of the pipe 3, and a pair of telescopic pipes 2 and 2 arranged side by side with a predetermined distance are formed by an outer pipe 3 and 3 and an inner pipe 4 and 4, respectively. The lateral pipes 10, 10 are connected to each other to form a telescopic pipe device 11. In the figure, 8 is a display plate attached to the upper end of one of the inner pipes 4, and 9 is the inner pipes 4 and 4 and the outer pipes 3 and 3.
At the same time, an operation member for fixing the slide member at a predetermined position or making it slidable is shown. The horizontal pipe 10 which connects the inner pipes 4 and 4 to each other is used to hook the hanger.

In the telescopic pipe 2 shown in FIGS. 1 and 2, from the opening of the outer pipe 3 whose upper end is opened, the inner pipe 4 is opened.
The inner pipe 4 is provided with a mechanism described below. That is, the inner pipe 4 having an outer diameter that is substantially equal to or slightly smaller than the inner diameter of the outer pipe 3 is biased to one of the outer peripheral portions of the lower end as shown in FIGS. A pair of slits 41, 41 are formed facing each other at a predetermined interval. Inside the inner pipe 4 in which the slits 41, 41 are formed,
A through hole 42 penetrating in the axial direction is provided at the center of the short cylindrical body, and a pair of guide grooves 43, 43 corresponding to the slits 41, 41 are biased to one of the outer peripheral portions of the lower end in an upward slope from the lower end. A guide member 44 that is formed so as to be inclined outward is fixed in a state in which the guide grooves 43 correspond to the slits 41.

On the other hand, in the inside of the inner pipe 4 shown in FIGS. 3 to 5, a shaft member 46 integrally provided with a contactor 45 having a hemispherical top at the tip end is provided with a through hole 42 provided in the guide member 44.
The guide member 4 is provided so as to be vertically movable while being penetrated inside.
4. A support member 47 having a support surface 47a whose diameter is expanded downward from the upper end at the tip of the shaft member 46 protruding from the lower end of 4.
Is integrally provided, and compression between the disk-shaped spring receiver 48 provided on the shaft member 46 above the guide member 44 and the upper surface of the guide member 44. A spring member 49 made of a spring is interposed, and the spring member 49 constantly urges the shaft member 46 upward. It should be noted that the shaft member 46 is biased upward by the support surface 47 of the support member 47.
The upper end of a is restricted by abutting the lower end of the guide member 44 (inner pipe 4).

In such inner pipe 4, the guide member 4
In the guide grooves 43, 43 formed in 4, the spherical body 50 is formed.
And the sphere 50 is attached to the support surface 47 of the support member 47.
It is held so as not to fall downward by a. The slit 41 formed in the inner pipe 4 has a width slightly smaller than the diameter of the sphere 50 present in the guide groove 43. For example, when the diameter of the sphere 50 is 7.0 mm, the slit 41 has a width of 6.5 mm. It is formed. Therefore, most of the hemispherical surfaces of the sphere 50 can be projected to the outside of the slit 41, but the sphere 50 is configured to move up and down along the slit 41 without escaping the whole.

A rotary shaft 51 is provided in the inner pipe 4 above the shaft member 46 in a state of being orthogonal to the inner pipe 4, and a tip portion of the rotary shaft 51 penetrates the inner pipe 4 and is externally connected. Earring knobs 53 each having an L-shaped side surface are provided on the protruding portion. Further, a pair of cams 52, 52 having a substantially cylindrical cross section are provided on the rotary shaft 51 in the inner pipe 4 at symmetrical positions with the rotary shaft 51 interposed therebetween.
Is integrally attached to the cam member, and the contact member 45 provided at the tip of the shaft member 46 is attached to the cam member.
The urging force of 9 makes it always in contact.

However, when the cams 52, 52 are in the horizontal position (see FIG. 3) with the rotary shaft 51 sandwiched therebetween, the shaft member 46 is pushed upward by the urging force of the spring member 49, and the contact 4
5 contacts the rotating shaft 51. Further, when the cams 52 and 52 take a vertical position (see FIG. 4) with the rotary shaft 51 sandwiched by rotating at an angle of 90 ° from the horizontal position, the contact element 45 comes into contact with the cam 52, and the pair of cams 52. The shaft member 46 is configured to be pushed downward against the biasing force of the spring member 49 by a distance corresponding to approximately the diameter. The shape and size of the cam are not limited to those in the embodiment, and the cross section may be fan-shaped or rectangular.

The horizontal / vertical switching operation of the cam member composed of the cams 52, 52 is performed by the earring knob 5 formed at both ends of the rotary shaft 51 projecting to the outside of the inner pipe 4.
It is possible to switch by rotating any one of 3 at an angle of 90 °, and that state can be maintained unless this switching operation is performed. When the earring knob 53 is operated as described above to move the cams 52, 52 to the vertical position as shown in FIG. 4, the shaft member 46 is pushed down against the urging force of the spring member 49 composed of a compression spring, The support member 47 integrally provided at the lower end is located at the lowermost end.

At this lowermost position, the gap formed between the lower end of the guide member 44 and the support surface 47a of the support member 47 is smaller than the diameter of the spherical body 50, so that the guide groove 43 is formed. The sphere 50 held inside does not fall off from this gap. Therefore, the spherical body 50 in the guide groove 43 of the guide member 44 formed at the lower end portion of the inner pipe 4 is guided by the guide groove 43 and the slit 41 without laterally deviating, and the upper end of the support member 47. Is supported by a support surface 47a that expands in diameter downward from the inner pipe 4
A slight gap is formed between the outer pipe 3 and the outer pipe 3.

By holding the state in which the shaft member 46 is pushed down in this way, the inner pipe 4 can be easily slid vertically along the outer pipe 3. The relationship between the inner pipe 4 and the outer pipe 3 is the earring knob 53.
Earring knob 5
Release the hand from 3 and grasp a part of the inner pipe 4
Can be moved up and down with respect to the outer pipe 3.

Next, when the earring knob 53 is rotated at an angle of 90 ° while the inner pipe 4 is held at a desired height with respect to the outer pipe 3, a cam 52, which is integral with the rotary shaft 51, is formed.
Reference numeral 52 indicates a horizontal position, and the shaft member 46 is pushed upward by the biasing force of the spring member 49 by a distance corresponding to the diameter of the pair of cams 52, and the contactor 45 at the tip of the shaft member 46 contacts the rotating shaft 51. As a result, the support member 47 that interlocks with the shaft member 46 also rises, and the spherical body 50 supported by the support surface 47a of the support member 47 becomes the inner pipe 4 and the support surface 47a whose diameter has increased due to the rise of the support member 47. A part of the spherical surface is projected to the outside of the slit 41 while being sandwiched in the gradually narrowed gap of the guide groove 4 which is inclined upward with an upward slope.
Ascending in 3 and 43, by this ascending, pressure contact is made at two pressure contact portions X, X on the inner peripheral surface of the outer pipe 3. (Fig. 6
(Refer to the pressure contact part X)

When the spherical body 50 is pressed against the inner peripheral surface of the outer pipe 3, the lower portion of the inner pipe 4 is pressed in the direction opposite to the spherical body 50, and the outer peripheral surface of the inner pipe 4 faces the outer peripheral surface. Pressed against the inner peripheral surface of the pipe 3 in a relatively wide range,
The friction resistance of the inner and outer pipes 3 and 4 generated at the pressure contact portion Y,
Pressure contact portions X, X between the sphere 50 and the inner peripheral surface of the outer pipe 3
The inner pipe 4 is supported at a predetermined elevated position with respect to the outer pipe 3 by the pressure contact in (3), and the inner pipe does not drop inadvertently during use.

In such a fixed state of the inner pipe 4, the sphere 50 is pressed against the inner peripheral surface of the outer pipe 3 by the guide groove 43 of the guide member 44. In this state, the inner pipe 4 can be pulled upward. When operated to, sphere 5
0 moves by rolling on the inner peripheral surface of the outer pipe 3 which is pressed against the inner pipe 4 by this pulling up, and lowers relative to the inner pipe 4 to try to come out of the guide groove 43. However, the support member 4 existing below the guide groove 43
In order to prevent the inner pipe 4 from sliding upward, the diametrically narrowed support surface 47a of the outer pipe 7 sandwiches the sphere 50 so as to sandwich the sphere 50 and strengthen the pressure contact with the inner peripheral surface of the outer pipe 3. It works. Therefore, even if the inner pipe 4 is lifted, the inner pipe 4 does not slide on the outer pipe 3 and the outer pipe 3 and the supporting legs 5 and the like connected thereto can be lifted at the same time.

In this case, if the support member 47 is merely a disc-shaped member, the sphere 50 that relatively rolls in the direction of coming out of the guide groove 43 simply contacts the disc-shaped support member. However, since the inner pipe 4 does not come into pressure contact with the inner peripheral surface of the outer pipe 3, the inner pipe 4 slides easily with respect to the outer pipe 3 by lifting the inner pipe 4, and the inner pipe 4 slips out of the outer pipe 3 in extreme cases. It will also end up.

When it is desired to change the height of the fixed inner pipe 4, the earring knob 53 is operated to push down the shaft member 46 to release the pressure contact between the sphere 50 and the outer pipe 3, thereby causing the inner pipe 4 to move. In contrast to this, it becomes a free state, so that the height of expansion and contraction can be easily changed in the above-mentioned manner.

The telescopic pipe device shown in FIG. 7 is composed of a single telescopic pipe 2 similar to that shown in FIG.
Similar to FIG. 1, it comprises an outer pipe 3 supported by leg members with casters (not shown) and an inner pipe 4 inserted from above, and a hanger is hung by an arm member (not shown) provided on the inner pipe 4. It is something to stop. This telescopic pipe device includes a contactor 45 at the tip of a shaft member 46, a cam 52, a rotary shaft 51, and an earring knob 53.
An operation member 54 that is not provided with an operation portion such as the above, but is instead connected to the upper end of the inner pipe 4 at the tip of the shaft member 46.
It is equipped with. Therefore, in a state where the operating member 54 is not pressed by a finger or the like, the spherical body 50 presses the inner peripheral surface of the outer pipe 4 and presses the spherical body 5.
No pressure contact with the inner surface of the outer pipe 4
Can be moved up and down, the other part is
Since it is the same as the telescopic pipe device of FIG. 2, its description is omitted.

[0028]

According to the telescopic pipe device of the present invention, a support member having a support surface that expands downward from the upper end is integrally attached to the lower end of the shaft member mounted in the inner pipe, and The sphere that is supported by the support surface of the support member is moved up and down along the guide groove by movement, and the switching for expansion and contraction and fixing of the inner pipe can be performed with one touch, and the inner pipe generated when the inner pipe is lifted It is possible to reliably prevent the pipe from sliding or coming off. Therefore, when the telescopic pipe device is moved, even if only the inner pipe is gripped and lifted upward, the fixed position of the inner pipe does not change with respect to the outer pipe, and the inner pipe does not come off, so that the efficiency and labor of mobile transportation can be improved. It can be greatly reduced.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of a telescopic pipe device of the present invention.

FIG. 2 is a perspective view showing another embodiment of the telescopic pipe device of the present invention.

FIG. 3 is a vertical cross-sectional view of a main part of the telescopic pipe device of FIG.

FIG. 4 is a longitudinal sectional view of a main part of the telescopic pipe device of FIG.

FIG. 5 is an exploded view showing an example of an inner pipe constituting the telescopic pipe device of the present invention.

FIG. 6 is a cross-sectional view showing a state in which the inner pipe is fixed to the outer pipe.

FIG. 7 is a vertical sectional view showing another embodiment of the inner pipe.

[Explanation of symbols]

 1, 11 Telescopic pipe device 2 Telescopic pipe 3 Outer pipe 4 Inner pipe 41 Inner pipe slit 43 Guide groove 44 Guide member 45 Contactor 46 Shaft member 47 Support member 48 Spring bearing 49 Spring member 50 Sphere 51 Rotating shaft 52 Cam

Claims (5)

[Claims] 1. A shaft member that holds a predetermined rising position with respect to the inner pipe by a spring member built in the inner pipe that slides up and down in the outer pipe and descends by pressing, and an upper end is provided at a lower end of the shaft member. A support member having a support surface that expands downward from the inner pipe is formed, and a slit is formed along the outer periphery of the lower end portion of the inner pipe along the axial direction, and the axial member penetrates the slit and the center portion of the inner pipe. The guide member is fixed in a state in which the guide groove formed by inclining outward from the lower end at an upward slope is formed on the outer peripheral portion of the guide member provided with the through hole, and the sphere existing in the guide groove is described above. The support surface of the support member is supported from below, the support member pushes up the sphere along the guide groove by the elevation of the shaft member, and the sphere protruding from the slit and the inner peripheral surface of the outer pipe are brought into pressure contact with each other, and the cam. A telescopic pipe device characterized by releasing the pressure contact between the spherical body and the inner peripheral surface of the outer pipe by lowering the rod so that the inner pipe can move up and down relative to the outer pipe. 2. The slit formed in the inner pipe is biased to one of the outer periphery of the lower end of the inner pipe, and a guide groove of a guide member fixed to the lower end of the inner pipe is formed corresponding to the slit. The telescopic pipe device according to claim 1, which is characterized in that. 3. A cam member, which is in constant contact with the tip of the shaft member, is rotatably mounted in the inner pipe, and the cam member is rotated by operating the cam member from the outside of the inner pipe.
The expandable pipe device according to claim 1 or 2, wherein the shaft member is configured to be moved up and down by this rotation. 4. The telescopic pipe device according to claim 1, wherein the telescopic pipe device comprises a single telescopic pipe formed by a pair of an inner pipe and an outer pipe. Pipe equipment. 5. The expansion / contraction pipe device is one in which a pair of expansion / contraction pipes formed by a pair of an inner pipe and an outer pipe are integrally connected by a horizontal pipe. A telescopic pipe device described in Crab.