JP3876418B2 - Connection structure for pipes used for folding sticks, etc. - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a connecting structure for pipe-shaped struts such as a folding stick, and can be used for connecting a folding pipe such as a tent strut in addition to a stick shaft.
[0002]
[Prior art]
Conventionally, a folding stick such as a metal pipe generally has a structure in which a pipe-shaped concave fitting and a convex fitting are combined at the end of the pipe and are attracted and connected by a rubber string passing through the center.
The structure will be described with reference to FIG.
Reference numerals 1 and 2 denote pipe struts, to which tapered connecting fittings 3 and 4 are attached, respectively. The connecting metal fitting is hollow and passes with the rubber string 5 stretched. Since both ends of the elastic band are fixed to the upper end and the lower end of the stick, the pipes are always in a state of attracting each other. When the pipe 1 and the pipe 2 are pulled apart by hand, the rubber string 5 is extended, and the connecting fittings 3 and 4 are separated.
FIG. 2 shows a state in which the connecting fittings 3 and 4 are separated and folded as they are.
In this state, the outer peripheral portion of the connecting metal fitting 4 strongly presses the contact point 6 with the outer peripheral portion of the pipe column 1 to be damaged. In recent years, there are many fashionable walking sticks in which pipes are decorated with floral patterns and the like, but it is inevitable that the decoration of the contact portion is damaged in this way.
[0003]
Moreover, if the hand is released in the folded state as shown in FIG. 2, the folded pipe is instantaneously opened by the tension of the elastic band 5, and the form cannot be maintained.
When carrying in the folded state, it was necessary to put it in a special bag or bundle it with a band.
[0004]
[Problems to be solved by the invention]
In the present invention, when the folding stick is folded, the pulling force between the pipes is stopped, and the folded state can be maintained.
[0005]
Further, the state holding function has a structure capable of withstanding an impact or the like.
[0006]
Moreover, it can be easily connected when using a stick.
[0007]
[Means for Solving the Problems]
In the present invention, a combination of a spring and a wire is used instead of a rubber string, and a stopper fitting is attached in the middle of the wire. In the folded state, the repulsive force of the spring is stopped by the stopper fitting.
[0008]
The stopper fitting was formed in an L shape so that the stopper fitting would not come off due to impact or the like when carried.
[0009]
When releasing the stopper function, use the shape of the connecting bracket to release the stopper.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
An embodiment of a pipe connection structure according to the present invention will be described with reference to the drawings.
FIG. 3 shows a state where pipe struts are connected.
1 and 2 are pipe struts, and 3 and 4 are connecting members made of aluminum. An iron sleeve 15 is inserted in the center of the concave connection fitting 3 to prevent wear. The pipe strut and the concave connection fitting 3 and the pipe support 2 and the convex connection fitting 4 are respectively fixed by an adhesive. 9 is a coil spring that serves as a push spring, 10 is a spring receiver, and 12 is a washer. Reference numeral 14 denotes a stopper fitting, to which wires 7 and 8 are connected at both ends, and ends of the wires 7 and 8 are connected to retaining rings 13 and 17, respectively. 11 is a buffer rubber.
[0011]
In FIG. 3, the spring receiver 10 is pushed to the left by the repulsive force of the coil spring 9. The wire 7, the stopper fitting 14, and the wire 8 connected to 10 are connected to each other by crimping the concave connection fitting 3 and the convex connection fitting 4 via the wire retaining rings 13 and 17.
[0012]
FIG. 4 shows a state in which the pipe support is folded. In the state of FIG. 3, by pulling the pipe strut 1 and the pipe strut 2 left and right, the concave coupling fitting 3 and the convex coupling fitting 4 are separated, and at the same time, the wire 8 is pulled up, and the stopper fitting 14 is made of the iron sleeve 15. The hook-like portion of the stopper fitting 14 enters the center hole and hits the upper end of the iron sleeve 15, and the repulsive force of the coil spring 9 is stopped. Further, the upper portion of the iron sleeve 15 has a loose conical shape, and the stopper fitting 14 is difficult to come off. At this time, the pipe strut 1 and the pipe strut 2 are connected by the wire 8 at a certain distance. In this state, folding is completed by folding the pipe support 1 and the pipe support 2 as shown in FIG.
[0013]
A mechanism for ensuring that the stopper fitting 14 is securely hooked on the upper end of the iron sleeve 15 and does not easily come off even when being carried is carried.
FIG. 5 shows the shape of the stopper fitting 14. As shown in the figure, the stopper fitting 14 is formed in an L-shape consisting of a vertical axis 18 and a horizontal axis 19, and the tip of the vertical axis 18 is hooked. Moreover, the holes 21 and 22 for letting a wire pass are made in the front-end | tip of the vertical axis | shaft 18 and the horizontal axis | shaft 19, respectively, and the wire 7 and the wire 8 are connected, respectively.
[0014]
The function of the stopper metal fitting 14 will be described with reference to FIGS. FIG. 6 shows a state in which the wire 8 is pulled up and the tip of the stopper fitting 14 enters the center hole of the iron sleeve 15. At this time, the stopper fitting 14 is pulled by the wire 7 and the wire 8, and the wire 7, the connecting hole 22, the connecting hole 21, and the wire 8 are in a straight line. Therefore, the vertical axis 18 of the stopper fitting 14 is positioned obliquely with respect to the wires 7 and 8 as shown in FIG. At this time, the outside of the vertical axis 18 and the inner diameter of the iron sleeve 15 are in contact with each other at a point 23 in the figure.
[0015]
FIG. 7 shows a state where the wire 8 is further pulled up. The stopper fitting 14 enters the iron sleeve 15 while changing the angle of the vertical axis 18 clockwise. At this time, the connecting hole 22 is separated from the straight line connecting the wire 8 and the retaining ring 13 of the wire 7, and a force for returning to the original position by the force of the spring works. That is, the stopper metal 14 is acted on by a counterclockwise force with the contact 23 with the iron sleeve 15 as a fulcrum.
FIG. 8 shows a state where the wire 8 is further pulled up and the hook portion 20 at the tip of the stopper fitting 13 is completely protruded from the upper end of the iron sleeve 15. The stopper fitting 14 is reliably engaged with the upper end of the iron sleeve 15 by the rotational force. Even in this state, the stopper metal 14 has a force to rotate counterclockwise and does not come off due to an impact or the like.
[0016]
A method of releasing the stopper from the folded state and connecting the pipes will be described with reference to FIG. FIG. 9 shows a state in which the convex connection fitting 4 is inserted into the concave connection fitting 3. The convex connection fitting 4 moves along the wire 8 and catches the tip of the stopper fitting 14. Further, by pushing the pipe support 2, the tip end of the convex connection fitting 4 moves the tip hook portion 20 of the stopper fitting 14 toward the center of the iron sleeve 15. Since the inner diameters of the center holes of the concave connection fitting 3 and the convex connection fitting 4 are the same, the stopper fitting 14 is disengaged from the upper end of the iron sleeve 15 just before being completely matched, and the wire 8 is pulled by the spring force, The concave connecting metal fitting 3 and the convex connecting metal fitting 4 are combined to return to the state shown in FIG. The buffer rubber 11 is a member for absorbing the impact at this time.
[0017]
【The invention's effect】
When folded, the pipe struts do not attract each other, so they are not damaged. In addition, it is easy to handle because the folded state is maintained even if it is released. When used for walking sticks, it is possible to create foldable materials that are easily scratched, such as carbon pipes and lacquered finishes.
[0018]
The L-shaped stopper bracket does not come off even if it is dropped and bumped while it is in a folded state and is subjected to an impact.
[0019]
Can be connected with one touch when using a stick.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of a connecting portion of a conventional folding stick.
FIG. 2 is a front view of a state in which a connecting portion of a conventional folding stick is folded.
FIG. 3 is a cross-sectional view showing a state in which connecting portions of the present invention are connected.
FIG. 4 is a cross-sectional view showing a state in which a connecting portion of the present invention is folded.
FIG. 5 is a front view of a stopper fitting.
FIG. 6 is a cross-sectional view of the connecting portion showing the function of the stopper fitting.
FIG. 7 is a cross-sectional view of the connecting portion showing the function of the stopper fitting.
FIG. 8 is a cross-sectional view of the connecting portion showing the function of the stopper fitting.
FIG. 9 is a cross-sectional view showing a mechanism for releasing a stopper.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Pipe support | pillar 2 Pipe support | pillar 3 Concave connection bracket 4 Convex connection bracket 5 Rubber string 6 Contact point of connection bracket 4 and outer periphery of pipe support 7 Wire 8 Wire 9 Coil spring 10 Spring receiver 11 Buffer rubber 12 Washer 13 Wire stopper Ring 14 Stopper bracket 15 Iron sleeve 16 Washer 17 Wire retaining ring 18 Stopper bracket longitudinal axis 19 Stopper bracket lateral axis 20 Stopper bracket distal end key 21 Stopper bracket longitudinal axis wire hole 22 Stopper bracket lateral axis wire hole 23 Sleeve and stopper bracket Contact point

Claims (1)

The center hole which is a truncated cone shape and has a through hole in the center so that it protrudes from the side end of the pipe at the side end of one pipe column 2 of the two pipe columns 1 and 2 to be connected. The concave connection fitting 3 having a tapered surface that fits the convex connection fitting 4 at the side end of the other opposite pipe strut 1 is fixed. Is fixed in the pipe support 1,
The tip of the tapered surface of the concave coupling metal 3 is opened, and an iron sleeve 15 having the same inner diameter as the central hole of the convex coupling metal 4 is inserted into the opening, and the side end side of the pipe strut 1 of the iron sleeve 15 is inserted. The upper end is provided with a step between the tapered surface of the concave connection fitting 3 so as to latch the end hook portion 20 of the stopper fitting 14 to be described later, and at the tip and the center of the concave connection fitting 3 in the pipe column 1. The coil spring 9 is accommodated between the spring receivers 10 in which the through holes are formed, and the spring receiver 10 can slide in the pipe column 1 according to the deformation of the coil springs 9.
The vertical axis 18 has an L-shape consisting of a vertical axis 18 and a horizontal axis 19, and the distal end of the vertical axis 18 has a hook shape, and the hook portion 20 of the leading end has a size capable of inserting the iron sleeve 15. The key portion 20 is positioned in the spring 9 so that the key portion 20 is on the iron sleeve 15 side, and the key portion 20 at the tip of the vertical axis 18 is connected to the key portion 20 in a concave shape with the key portion 20 hooked on the iron sleeve 15. Formed so that the tip of the convex coupling metal 4 can enter between the taper surface of the metal fitting 3,
Holes 21 and 22 are formed at the tips of the vertical axis 18 and the horizontal axis 19 of the stopper fitting 14, the wire 8 is connected to the hole 21 at the tip of the vertical axis 18, and the wire 7 is connected to the hole 22 at the tip of the horizontal axis 19. The wire 8 connected to the hole 21 at the tip of the vertical axis 18 is inserted through the center hole of the convex connector 4, and the end of the wire 8 is connected to the retaining ring 17 so as not to come out of the center hole of the convex connector 4. The wire 7 connected to the hole 22 at the tip of the horizontal shaft 19 passes through the coil spring 9 and is inserted through the through hole at the center of the spring receiver 10, and the end of the wire 7 is connected to the retaining ring 13. And so as not to come out of the spring receiver 10.
The length of the wire 8 is such that when the coil spring 9 is contracted and the tip hook portion 20 of the stopper fitting 13 is hooked on the upper end of the iron sleeve 15, the pipe strut 1 and the pipe strut 2 are bent and both pipe struts 1, 2 are bent. The length of the wire 7 is such that the tip hook portion 20 of the stopper fitting 14 hangs on the upper end of the iron sleeve 15 when the coil spring 9 is contracted. In the state in which the convex connection fitting 4 of 2 is inserted and the pipe strut 1 and the pipe strut 2 are connected, the stopper fitting 14 is entirely located in the coil spring 9 and the coil spring 9 is not completely extended. As described above, the length of the wire 7 and the wire 8 is set, and it is used for a folding stick etc. The connection structure of the type.

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