JP2001112563A - Crossed leg type height regulation leg having movable fulcrum joint - Google Patents

Abstract

PROBLEM TO BE SOLVED: To regulate the height of an X-shaped collapsible leg itself by extending by connecting extension members to the tubular legs or storing the extension members into the tubular legs and solve the difficulty of miniaturization. SOLUTION: Two legs 1 and 2 are connected by movable fulcrum joints 3 having fulcrums of the pins 3C. The legs 1 and 2 are swiveled by operating integrally with joint frames 3a and 3b around pins 3c. By moving the joints 3 on the legs 1 and 2, the spread of the legs can be kept constantly and the height can be regulated. As tubular legs 1 and 2 have no obstacle such as pins, extension members 4 can be extended by a length almost equivalent to the length of the legs 1 and 2, and can stored without modifying the extension members 4.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a storage device such as a tennis ball or the like which can be adjusted in height and inclination and which can be folded, and a cross leg type height adjusting leg such as a folding chair.
It should be noted that the storage device here is a concept generally including various types of legs on which objects are placed.

[0002]

2. Description of the Related Art For example, a tennis ball storage cart cannot be height-adjusted by a simple foldable container that can be opened and closed with a fixed pin as an axis, like a conventional folding chair. As a method of adjusting the height, it is composed of tubular members with different diameters,
A table system in which one leg is put in and out of a tube to adjust the height is generally used, and the adjustment is complicated, and it is difficult to achieve miniaturization for easy carrying.

[0003]

In the conventional fixed-pin type cross leg folding system, since the space between two open legs is restricted and used, for example, as a seat surface of a chair, once the height is set, the height is adjusted. Is impossible. When it is desired to adjust the height, another member must be screwed into or inserted into the leg, which has to be achieved. In addition, although it can be folded like a foldable tennis ball storage cart, it cannot be shortened in the height direction, so that it is inconvenient to bring it into a car or a train.

According to the present invention, the height and inclination can be adjusted by only the legs combined so as to intersect in an X-shape, and the height and inclination adjustment ranges can be easily adjusted by additionally adding members other than the legs. An object of the present invention is to greatly increase the size and to shorten the height direction together with folding to reduce the size and make it more convenient to carry.

[0005]

SUMMARY OF THE INVENTION The present invention provides a cross-type folding leg which is provided with a fulcrum, instead of using a conventional fixed pin system for penetrating the leg itself for connecting the two legs. The joint method was used. This joint can be freely moved in the axial direction of the leg and can be fixed at any position, so that even with a single member leg, the leg opening can be adjusted without changing the opening size of the two legs either up or down. The height can be adjusted with. In addition, the inclination can be formed by connecting the two legs by shifting them in the axial direction. Further, since there is no pin hole penetrating through the leg itself, the extension member can be pushed into the tubular leg as long as the length of the leg can be stored, so that the size can be significantly reduced. In addition, the two leg members are respectively included and fixed in the frame of the movable fulcrum joint.

By making the leg member tubular, inserting an extension member into the tube, and adjusting the insertion depth, the range of adjustment of the overall height of the apparatus can be greatly expanded. The locking of the extension member in the height direction can be stopped by pressing with a screw or inserting a pin from the radial direction of the tubular leg.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION In a cross leg type leg, if a joint having a movable fulcrum is moved up and down and, for example, the fulcrum is set high, the width of the restraint width above the legs 1 and 2 is reduced. Achieved by widening the opening, the overall posture is low, and when the fulcrum is set low, the small legs are opened according to the restraint dimensions at the upper portions of the legs 1 and 2, and the overall posture is high. If the leg is made tubular and the extension member is inserted into the tube, the height adjustment range after insertion can be greatly expanded. Conversely, if the leg is used at the height of the extension member and this member is pushed into the pipe when not in use, the size can be reduced accordingly. If the legs 1 and 2 are connected to each other with their lengths shifted from each other, an arbitrary inclination can be formed.

[0008]

BRIEF DESCRIPTION OF THE DRAWINGS FIG.
FIG. 1 is a perspective view showing a basic configuration of the present invention. Legs 1, 2
Is fixed to a movable fulcrum joint 3 movable in the axial direction. The extension member 4 is easily inserted into and removed from the tubes of the legs 1 and 2. A container 5 is fixed to an upper portion of the extension member 4. 1c is a moving wheel. In FIG. 2, the movable fulcrum joint 3 is a combination of two frames 3a and 3b freely pivotable about a pin 3c, and a leg 1.2 is slidably contained in each frame 3a and 3b. The fixing is completed by tightening the screw 3d. FIG. 4 shows a method of locking the extension member 4, in which a plurality of holes 1a, 2a are provided in the radial direction of the legs 1, 2 and the pins 1b, 2b are inserted into the holes 1a, 2b to hold the extension member 4. Pin 1
By changing the set positions of b and 2b, the height of the extension member 4 can be adjusted stepwise. FIG. 5 shows a so-called folded state in which the legs 1 and 2 are turned, and the extension member 4 is inserted into the tubes of the legs 1 and 2. Since the extension member 4 can be pushed to the full length of the legs 1 and 2, it can converge to almost half the height when extended.

FIG. 3 shows the principle of height adjustment of the cross leg alone. The legs 1 and 2 are held by a movable fulcrum joint 3 in an X shape. Now, the opening width of the ends of the legs 1 and 2 is restrained to be constant, for example, like a chair seat. Here, the movable fulcrum joint 3
If you hold it below legs 1 and 2 as in 3 ', the tips of legs 1 and 2
It becomes higher as shown in 1 'and 2'. According to this principle, the height can be adjusted steplessly without changing the tip width of the legs 1 and 2. FIG.
Fig. 2 shows the principle of tilt formation using the cross leg alone. For example, if the length of the leg 1 is deviated from that of the leg 2 and the movable fulcrum joint 3 is connected like 3 ', the inclination shown in the leg 1' is formed.

FIG. 7 shows an application example of the present invention in which a container 5 fixed to an extension member 4 is used as a rope-like flexible body to form a tennis ball storage cart. FIG. 9 shows an example in which the lengths of the legs 1 and 2 are shifted and combined, the container 5 is inclined, and the ball 9 is easily taken out. Further, one end of the string-like belt 10 is fixed to the extension member 4, passes through the lower part of the mesh container 5, and is held between the roller 11 fixed to the other extension member 4, for example, a ball
When the number 9 is reduced and it is difficult to take out by collecting at the bottom, the bottom of the container 5 is pushed up by pulling up the belt 10, thereby facilitating the taking out of the ball. FIG. 8 shows an application of the present invention to a folding chair. The chair legs 6, 7 are fixed with the movable fulcrum joint 3, and a chair having a height in which the flexible seat sheet 8 is fixed to the upper part of the chair legs is formed. In FIG. 10, the movable fulcrum joint 3 is moved and fixed below the chair legs, and
Is set to a high height.

[0011]

Since the present invention is configured as described above, it exhibits the following effects. The height and tilt can be adjusted steplessly by simply changing the fulcrum position without using any other components for the X-shaped crossed legs themselves. In addition, the leg itself is made into a tube, and other members are inserted into the tube to easily construct a structure of a required height, and when not in use, this member is pushed to the full length of the tube, thereby greatly increasing the size. Miniaturization can be achieved and portability can be easily achieved. If the present invention is applied to, for example, a folding tennis ball storage cart or a folding chair, the above effects can be sufficiently exerted.

[Brief description of the drawings]

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

FIG. 2 is a sectional view of a main part of the present invention, a movable fulcrum joint.

FIG. 3 is an explanatory view of a height forming principle of the present invention.

FIG. 4 is a detailed view around the leg of FIG. 1;

FIG. 5 is a view showing the folded state of FIG. 1;

FIG. 6 is an explanatory view of the principle of tilt formation according to the present invention.

FIG. 7 is an example of a tennis ball storage cart.

FIG. 8 Example of folding chair

FIG. 9: Example of forming and raising the inclination

FIG. 10: Example of folding chair after height adjustment

[Explanation of symbols]

 Leg Movable fulcrum joint Extension member Container Ball Belt Roller

Claims (2)

[Claims] 1. A frame which is connected by pins so that the two leg members themselves can be freely swung without being directly connected with a pin or the like, and has a fastening function for fixing the leg members to the frame. A cross leg having a movable fulcrum joint which constitutes a gantry, table, cart, etc. function by fixing a leg member by a joint which can freely move in the longitudinal direction of the leg to be formed, and intersecting the leg in an X shape. Formula height adjustable legs 2. The leg of the leg is formed in a tubular shape, and an extension member other than the leg of the leg is inserted into the tube to increase the height of the leg above the original leg. 2. A cross leg type height adjustable leg having a movable fulcrum joint according to claim 1, wherein