JPH07328084A - Crutch - Google Patents

Abstract

PURPOSE:To provide a crutch easy to assemble, capable of reducing the cost and increasing the overall strength, and having high safety. CONSTITUTION:A cap member 8 is constituted of a circular portion 9 at the center and bottomed tube sections 10, 10 on both sides of the circular portion 9. The bottomed tube sections 10, 10 of the cap member 8 are coupled with the lower ends of a pair of the right and left main pipes 7, 7 fitted with an armpit pad 12 and a grip 15 respectively to connect both main pipes 7, 7 together. A leg pipe 1 is inserted into the circular portion 9, and the leg pipe 1 and the main pipes 7, 7 are integrally fastened and fixed with a bolt 22 and a nut 23.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a crutch.

[0002]

2. Description of the Related Art In a conventional crutch, as shown in FIG. 6, a pair of left and right main pipes 100, 100 extending in a bifurcated shape upward are cross-sectioned so as to fit the outer peripheral surface of a leg pipe 101. Pressed into a crescent shape, stacking the pressed parts on both sides of the leg pipe 101 and bolt 10
2 by tightening the nut 103 with the main pipe 100,
The 100 and the leg pipe 101 are connected and fixed.

[0003]

In the conventional crutch, extra work is required because the lower ends of the pair of left and right main pipes 100, 100 are pressed to match the outer peripheral surface of the leg pipe 101. As a result, the cost will be high. In addition, since the main pipes 100, 100 are made of nicked aluminum, there are problems in strength, such as cracking during pressing and bending at the pressing points when adjusting the height of the legs. It was

Furthermore, the biggest problem with the conventional crutch is that the lower ends of the main pipes 100, 100 are crushed by pressing and there is no catch step, so that they can slip when climbing stairs. It means that it always goes into the hole and is always dangerous.

The present invention has been made in view of the above problems of the prior art. The object of the present invention is to facilitate the assembling, reduce the cost, and increase the overall strength. The purpose of the present invention is to provide a crutch that can be used and is highly safe in use.

[0006]

In order to achieve the above object, in the crutch of the present invention, an annular portion is provided at the center, and bottomed cylindrical portions are provided on both sides of the annular portion to form a cap member. , The bottom pipes of the cap member are fitted and fixed to the lower ends of the pair of left and right main pipes on which the armpits and the grips are mounted, thereby connecting the main pipes to each other and connecting the leg pipes to the annular portion. The leg pipe and the main pipe are integrally fixed by fitting the bolts and nuts.

[0007]

With the pair of left and right main pipes and the leg pipes, the bottomed cylindrical portions of the cap members are fitted and fixed to the lower ends of the main pipes, respectively, and the leg pipes are fitted into the annular portion of the cap member and bolted. It is fixed together by tightening the nut. The cap members attached to the lower ends of the pair of left and right main pipes function to facilitate the assembling and surely prevent slipping or falling into a hole on stairs or the like.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view of a crutch, and FIG. 2 is an exploded perspective view thereof. In the figure, reference numeral 1 is a leg pipe made of a straight pipe having a required length, a plurality of through holes 2 are formed in the upper half of the leg pipe, and a locking hole 3 is formed in the lower portion. Further, an auxiliary leg pipe 1a is inserted into the leg pipe 1 so as to be able to move back and forth, and the length of the auxiliary leg pipe 1a is adjusted by a lock button 4 for fixing and a push button 5 projecting from a locking hole 3. It is configured to be possible. Reference numeral 6 is a rubber chip fixed to the lower end of the auxiliary leg pipe 1a for preventing slippage and impact.

Reference numerals 7 and 7 denote a pair of left and right main pipes that expand upward in a bifurcated shape, and 8 is a cap member that connects the lower ends of the main pipes 7 and 7 to each other. The cap member 8
As shown in FIGS. 3 and 4, has a ring-shaped portion 9 in which the leg pipe 1 is fitted and inserted, and a bottomed cylindrical portion fitted on the lower ends of the main pipes 7, 7 on both sides of the ring-shaped portion 9. 10,
10 is provided and is formed by integral molding of synthetic resin. Further, the main pipes 7, 7 are bent so as to have expansion elasticity in the outward direction, and a plurality of receiving holes 11 are formed on the inner side surface thereof at appropriate intervals in the axial direction.

Reference numeral 12 designates a side wall which is detachably attached to the upper ends of the main pipes 7, 7, and is provided with two cylinders 13, 13 having lower ends opened on the lower surface thereof. 14,
14 is an annular member attached to the lower ends of the cylinders 13, 13.
It is made of synthetic resin or hard rubber, etc., and facilitates attachment of the armrests 12, and the main pipes 7, 7 and the tubular body 1
It serves to conceal the joint with 3,13.

Reference numeral 15 denotes a grip mounted across the main pipes 7, 7, and both ends of the grip 15 are short rods 16, 1 fitted into the receiving holes 11 of the main pipes 7, 7.
6 is projected. Further, both side ends of the grip 15 are formed as concave curved surface portions 17, 17 which fit substantially half around the outer peripheral surfaces of the main pipes 7, 7. This concave curved surface portion 17,
Reference numeral 17 is adapted to the outer peripheral surfaces of the main pipes 7, 7 and functions to prevent the grip 15 from rotating.

The illustrated crutch according to the present invention is assembled in the following manner. First, the lower ends of the main pipes 7, 7 are fitted into the bottomed tubular portions 10, 10 of the cap member 8, and the through holes 18, 18 of the main pipes 7, 7 and the cap member 8 are penetrated as shown in FIG. The tubular bodies 20, 20 are fitted into the holes 19, 19 and caulked in an eyelet shape to fix them. This connects the two main pipes 7, 7 to each other. Then, in this state, the leg pipe 1 is fitted into the annular portion 9 of the cap member 8, and the bolt insertion holes 21 and 21 of the main pipes 7 and 7 and the through hole 2 of the leg pipe 1 are inserted.
The leg pipe 1 and the main pipes 7, 7 are connected and fixed by tightening a bolt 22 and a nut 23 that pass through. In this way, the main pipes 7, 7 and the leg pipe 1 are connected and fixed to each other by bolting at one place, so that the assembly is easy, and when adjusting the length, the bolt 22 is removed to remove the leg pipe 1. It can be achieved by a simple operation of simply sliding up and down.

Next, the short rods 16 and 16 of the grip 15 are fitted into the receiving holes 11 of the main pipes 7 and 7, and the grip 15 is attached. In this state, the main pipes 7 and 7 resist the expansion elasticity. While pushing inwardly, the cylindrical bodies 13, 13 of the armpit 12 are fitted to the upper ends of the main pipes 7, 7. In addition, grip 1
The height position of 5 can be freely set by arbitrarily selecting the receiving holes 11 of the main pipes 7, 7. This allows
The grip 15 is mounted so that its height can be adjusted.

[0014]

Since the present invention is constructed as described above, it has the following effects.

The lower ends of the pair of left and right main pipes are fitted to the bottomed cylindrical portion of the cap member to be connected to each other, and the leg pipes are inserted into the annular portion of the cap member and the bolts and nuts are tightened to fasten the main pipe and the legs. By adopting the configuration of connecting the pipes, the leg pipe and the main pipe can be bolted in only one place, so that the assembly can be facilitated and the length can be easily and smoothly adjusted.

Further, by using a cap member when connecting the main pipe and the leg pipe, the lower end of the main pipe can be connected without being crushed by a press as in the conventional case, so that the strength can be increased. Therefore, it is possible to reduce costs by eliminating the need for extra press processing.

Further, by using the cap member, even if the cap member is slipped or fitted into a hole when climbing up or down stairs, it can be safely used because it is supported by the cap member.

[Brief description of drawings]

FIG. 1 is a perspective view of a crutch according to an embodiment.

FIG. 2 is an exploded perspective view of FIG.

FIG. 3 is a perspective view of a cap member.

4 is a cross-sectional view of FIG.

FIG. 5 is a cross-sectional view of a main part.

FIG. 6 is an explanatory diagram of a conventional technique.

[Explanation of symbols]

 1 Leg pipe 7,7 Main pipe 8 Cap member 9 Annular part 10,10 Bottomed cylinder part 12 Side contact 15 Grip 22 Bolt 23 Nut

Claims (1)

[Claims] 1. A cap member having an annular portion in the center, and a bottomed cylindrical portion provided on both sides of the annular portion to form a cap member. The cap member is provided at the lower ends of a pair of left and right main pipes to which armrests and grips are attached. The two main pipes are connected to each other by fitting and fastening the bottomed cylindrical parts of each, and the leg pipes are fitted and inserted in the annular portion, and the leg pipes and the main pipes are fastened with bolts and nuts. A crutch characterized by being fixed integrally.