JPH11315650A - Connection mechanism between operation member and angular shaft of door - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simplify a connection mechanism between an operation member such as a handle and an angular shaft of a door and improve the strength of the angular shaft. SOLUTION: A set screw 7 which passes through a basic part of a door operation member 1 on an indoor side and faces its inner end a ridge part of an angular shaft 2 is provided. The ridge part of the angular shaft 2 facing the inner end of the set screw 7 is planed to form a spring receive face 8, and a dimension in the direction of axial line of the angular shaft of the spring receive face 8 is set to be larger at least than an outside diameter of the set screw 7. A small diameter part 9 is formed in an inner end part of the set screw 7, and a compression coil spring 11 having a length longer than that of the small diameter part 9 and a smaller outside diameter than that of the set screw 7 is wound and provided in this small diameter part 9.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a mechanism for connecting a door operating member such as a handle to a square shaft (hereinafter, simply referred to as a connecting mechanism).

[0002]

2. Description of the Related Art The distance between a lever handle, knob or other operating member mounted on a door and one end of a square shaft linked to a latch bolt of a lock box is disclosed in Japanese Utility Model Publication No. 58-32516 or Japanese Utility Model Publication No. Sho 62-62. As shown in Japanese Patent No. 24687 and the like, it is extremely common that the screw is screwed to the operation member and the tip is detachably fixed by a set screw pressed into a receiving groove of the square shaft.

The coupling mechanism having such a structure considers a set screw as an elastic body having a large spring constant, and presses the set screw itself against a thread of a female screw formed on an operation member by a large elastic force generated by a slight elastic deformation. This is to prevent the set screw from turning in the loosening direction due to the frictional force generated between the male and female threads.

[0004] However, when an external force due to an impact or vibration applied to the coupling mechanism in the loosening direction of the set screw loosens the set screw, slight rotation of the set screw causes the male and female threads to move between the male and female threads. The frictional force disappears.

Therefore, the applicant of the present invention has previously described, for example, Japanese Patent Application No.
With No. -13860, a leaf spring is straddled between the handle and the rotating member such as a retractor in the lock box, and the central part of this leaf spring is pressed by a set screw and elastically deformed.
A coupling mechanism for pressing both ends of the handle against the handle and the rotating member has been proposed.

[0006] The coupling mechanism having such a structure has an advantage that the coupling between the square shaft and the handle is stabilized because slight loosening of the set screw hardly affects the elastic deformation of the leaf spring.

[0007]

The coupling mechanism proposed by the applicant of the present invention as described above, of course, has the desired function and has been put to practical use. It is necessary to form a slot or to divide an angular axis into two triangular axes having a triangular cross section, and to form a groove for accommodating a leaf spring in a joint surface thereof.

In other words, the processing of the square shaft is inevitable, and it is necessary to prepare a leaf spring as a separate member. In other words, the structure of the coupling mechanism must be complicated.

In addition, since the square shaft is divided into two or forms a slit, the torsional strength and torsional rigidity of the square shaft are reduced.
Inconvenience also arises.

According to the present invention, not only the connection between the square shaft and the door operating member can be stably maintained, but also the structure is simple and easy to manufacture, and the torsional strength and rigidity of the square shaft can be improved. It is intended to provide a coupling mechanism.

[0011]

SUMMARY OF THE INVENTION In order to achieve the above object, the invention according to the first aspect of the present invention provides a door operating member on the indoor side which is fitted to the indoor end of a square shaft, and this door operating member. And a set screw that penetrates the base of the set screw so that the inner end faces the ridge of the square shaft. The ridge of the square shaft that faces the inner end of the set screw is cut to form a spring receiving surface. The dimensions of the surface in the direction of the axis of the axis are set to be at least larger than the outer diameter of the set screw, and a small diameter portion is formed at the inner end of the set screw. Characterized in that a compression coil spring smaller than that of the above is wound.

According to a second aspect of the present invention, there is provided a door operating member on the indoor side to be fitted to the indoor end of the square shaft, and an inner end passing through the base of the door operating member and having an inner end of the square shaft. A set screw facing the ridge, and forming a spring receiving surface by shaving the ridge of the square shaft facing the inner end of the set screw, and setting the dimension of the spring receiving surface in the direction of the square axis to at least the set screw. In addition to being set larger than the outer diameter of the set screw, a recess was formed in the inner end of the set screw, and a compression coil spring longer than the length and having an outer diameter smaller than the inner diameter of the recess was elastically mounted on the recess. It is characterized by the following.

[0013]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 3 showing a first embodiment according to the first aspect of the present invention, reference numeral 1 denotes a lever handle, a knob and the like detachably attached to the inner end of the square shaft 2 by a coupling mechanism according to the present invention. 2 shows the operation member on the indoor side of FIG.

An outdoor operation member 3 is mounted on the outer end of the square shaft 2 and is fixed to the square shaft 2 by caulking a pin 4 or the like.

At the bases of the operation members 1 and 3 on the outdoor and indoor sides, insertion holes 5 each having a rectangular cross section are formed, and both ends of the square shaft 2 are respectively inserted into the insertion holes 5 of the corresponding operation members. The difficulty in fitting is similar to that of the conventional coupling mechanism.

The square shaft 2 passes through a lock box (not shown),
The central portion thereof is linked to a latch bolt (not shown) via a rotating member such as a retractor.

As shown in FIG. 1, a female screw hole 6 is formed at the base of the operation member 1 on the indoor side, and a female screw hole 6 is formed at the outer end of the female screw hole 6 so as to engage with, for example, a flathead screwdriver. The set screw 7 is screwed and the inner end faces the ridge of the square shaft 2.

On the other hand, the angular shaft 2 facing the inner end of the set screw 7
The ridge is cut by, for example, plastic working or the meat is stolen to form a spring receiving surface 8.

In the illustrated embodiment, the spring receiving surface 8 is shown as being elongated extending in the axial direction of the square shaft 2. However, according to the principle of the present invention, the dimension in the square axial direction is at least stopped. What is necessary is just to set larger than the outer diameter of a screw.

On the other hand, if the spring receiving surface 8 is made longer for the embodiment shown, there is an advantage that doors having various thicknesses can be accommodated.

If the spring receiving surface 8 is slightly inclined in the length direction of the square shaft 2, when the set screw 7 is screwed in, the inner end thereof does not come into contact with the spring receiving surface but at a point. Therefore, there is another advantage that the amount of elasticity or plastic deformation of the set screw 7 is increased and the connection between the square shaft 2 and the internal operation member 1 is strengthened.

On the other hand, the inner end of the set screw 7
As shown in FIG. 3, a small-diameter portion 9 is formed, and a compression coil spring 11 that is longer than the length and has an outer diameter smaller than that of the set screw 7 is wound around the small-diameter portion 9.

The material, wire diameter and number of turns of the compression coil spring are adjusted so as to exhibit as large an elasticity as possible when compressed as shown in FIG.
Needless to say, the stress should be set so as not to exceed the allowable stress.

The coupling mechanism according to an embodiment of the present invention having the above-described structure is as shown in FIG.
The operation member 1 on the indoor side is fitted to the inner end of the square shaft 2, and the set screw 7 is screwed into the female screw hole 6 with the small diameter portion 9 and the compression coil spring 11 on the square shaft 2 side.

Then, when the inner end of the screw comes into contact with the spring receiving surface 8 like a normal set screw, the driver is turned slightly slightly so that the set screw 7 bites into the spring receiving surface 8.

Then, as shown in FIG. 1, the compression coil spring 11 wound around the small diameter portion 9 of the set screw is compressed in the axial direction, so that the elasticity of the compression coil spring 11 is reduced.
Outwardly, and a strong frictional force is generated between the threads of the set screw 7 and the female screw hole 6, so that the frictional force effectively prevents the set screw 7 from being loosened due to aging and impact. You.

FIG. 4 shows a second embodiment according to the second aspect of the present invention. In the second embodiment, a cup-shaped recess 12 coaxial with the set screw 7 is formed at the inner end of the set screw 7. ,
The compression coil spring 7 is elastically mounted in the recess 12.

The compression coil spring 7 in the second embodiment is set to be longer than the length (depth) of the recess 12 and to have an outer diameter smaller than an inner diameter of the recess.

Since the operation and effect of the coupling mechanism according to the second embodiment shown in FIG. 4 are the same as those of the first embodiment shown in FIGS. 1 to 3, further detailed description will be omitted.

[0030]

As is apparent from the above description, according to the present invention, the spring receiving surface is formed on the ridge of the square shaft, and the compression coil spring is elastically mounted between the spring receiving surface and the set screw. ,
Due to the elastic force of the compression spring, a large frictional force is generated between the thread of the set screw and the female screw hole, and the frictional force effectively prevents the set screw from loosening for a long period of time.

Further, since the compression coil spring is dimensioned so as to be able to pass through the female screw hole, no other processing is required only by forming the female screw hole in the operation member, and there is no need to prepare a leaf spring as a separate member. Together with this, not only the structure of the coupling mechanism according to the present invention can be simplified, but also the manufacture is easy.

Furthermore, since other processing such as groove formation and division is not required for the square shaft 2 in addition to the formation of the spring receiving surface, the strength and torsional rigidity of the square shaft 2 can be improved. Has the effect of

[Brief description of the drawings]

FIG. 1 is a partial cross-sectional side view of a coupling mechanism according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view of the square axis taken along line II-II in FIG.

FIG. 3 is a partially enlarged side view showing a combination of a set screw and a compression coil spring in the first embodiment of the present invention.

FIG. 4 is an enlarged partial cross-sectional side view showing a combination of a set screw and a compression coil spring according to a second embodiment of the present invention.

[Explanation of symbols]

 Reference Signs List 1 operation member 2 square shaft 5 insertion hole 6 female screw hole 7 set screw 8 spring receiving surface 9 small diameter portion 11 compression coil spring 12 concave portion

Claims (2)

[Claims] An indoor door operating member that fits into the indoor end of a square shaft, and a set screw that penetrates the base of the door operating member and exposes the inner end to the ridge of the square shaft. A spring receiving surface is formed by shaving the ridge of the square shaft facing the inner end of the set screw, and the size of the spring receiving surface in the direction of the square axis is set to be at least larger than the outer diameter of the set screw. A small-diameter portion is formed at an inner end portion of the set screw, and a compression coil spring longer than the length of the small-diameter portion and having an outer diameter smaller than that of the set screw is wound around the small-diameter portion. And square axis coupling mechanism. 2. An indoor door operating member that fits into an indoor end of a square shaft, and a set screw that penetrates a base of the door operating member and exposes an inner end to a ridge of the square shaft. A spring receiving surface is formed by shaving the ridge of the square shaft facing the inner end of the set screw, and the size of the spring receiving surface in the direction of the square axis is set to be at least larger than the outer diameter of the set screw. A concave portion is formed at an inner end portion of the set screw, and a compression coil spring longer than the length thereof and having an outer diameter smaller than the inner diameter of the concave portion is elastically mounted on the concave portion. And square axis coupling mechanism.