JP4249289B2 - Coupling mechanism of door operation member and square shaft - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an improvement in a coupling mechanism (hereinafter simply referred to as a coupling mechanism) between an operating member of a door such as a handle and a square shaft.
[0002]
[Prior art]
The gap between the lever handle, knob or other operation member attached to the door and one end of the square shaft linked to the latch bolt of the lock box is disclosed in Japanese Utility Model Publication No. 58-32516 or Japanese Utility Model Publication No. 62-24687. As shown, it is very common to detachably fix with a set screw which is screwed onto the operating member and whose tip is pressed against the receiving groove of the square shaft.
[0003]
The coupling mechanism of such a structure considers the set screw as an elastic body having a large spring constant, and presses the set screw itself against the thread of the female screw formed on the operating member by the large elastic force generated by the slight elastic deformation, so that the male and female The frictional force generated between the two screw threads prevents the set screw from rotating in the slack direction.
[0004]
However, if the external force due to the impact or vibration applied to this coupling mechanism loosens the set screw, the frictional force between the male and female threads is reduced by the slight rotation of the set screw. It will disappear.
[0005]
Therefore, the applicant of the present invention firstly, for example, in Japanese Patent Application No. 6-13860, a leaf spring is straddled between a rotary action member such as a retractor in the lock box and the handle, and the central portion of the leaf spring is arranged. A coupling mechanism that presses and elastically deforms with a set screw and presses both ends of 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 stable because a slight loosening of the set screw hardly affects the amount of elastic deformation of the leaf spring.
[0007]
[Problems to be solved by the invention]
The above-mentioned coupling mechanism proposed by the applicant of the present invention has, of course, exhibited a desired function and is practically used. However, on the other hand, it forms a slit for mounting a leaf spring on at least the angular axis, or the angular axis. Needs to be divided into two triangular axes having a triangular cross section, and a groove for accommodating the leaf spring must be formed on these joint surfaces.
[0008]
In other words, it is inevitable to process the square shaft, and it is necessary to prepare a leaf spring as a separate member. In short, the structure of the coupling mechanism must be complicated.
[0009]
Further, since the angular axis is divided into two or formed with a slit, there is a disadvantage that the torsional strength and torsional rigidity of the angular axis are reduced.
[0010]
The present invention provides a coupling mechanism that not only keeps the coupling between the square shaft and the door operation member stable, but also has a simple structure and is easy to manufacture, and can improve the torsional strength and rigidity of the square shaft. It is intended to provide.
[0011]
[Means for Solving the Problems]
In order to achieve the above-mentioned object, the invention according to claim 1 is characterized in that the corner shaft penetrating the lock box and linked to the latch bolt or the like and the indoor door operation member are kept stable, and the corner It increases the torsional strength and rigidity of the shaft, and it is a room-side door operation member that fits into the indoor end of the angular shaft, and the base end of the door operation member penetrates the inner end to the ridge of the angular shaft. And a ridge portion of the angular shaft facing the inner end of the set screw to form a spring receiving surface, and the dimension of the spring receiving surface in the direction of the angular axis is at least A larger diameter is set than the outer diameter, a small diameter portion is formed at the inner end of the set screw, and a compression coil spring longer than the length and smaller in outer diameter than that of the set screw is wound around the small diameter portion. Fit the indoor operation member to the inner end of the square shaft and screw the set screw into the female screw hole to The spring receiving surface rotate the screwdriver little stronger After contact, as well as to bite into the set screw to the spring receiving surface, characterized in that so as to prevent the loosening of the set screw by elastic force of the compression coil spring.
[0012]
In addition, the invention according to claim 2 keeps the coupling between the square shaft penetrating the lock box and linked to the latch bolt, etc., and the door operation member on the indoor side, and torsional strength and rigidity of the square shaft. It is those enhancing, setscrew and the indoor side of the door operating member to be fitted to the interior side of the end of the square shaft, to face the inner end through the base of the door operating member ridge of square shaft The edge of the angular shaft facing the inner end of the set screw is cut to form a spring receiving surface, and the dimension of the spring receiving surface in the direction of the axial axis is set to be at least larger than the outer diameter of the set screw. In addition, a concave portion is formed at the inner end of the set screw, and a compression coil spring longer than the length and smaller in outer diameter than the inner diameter of the concave portion is elastically mounted on the concave portion. The operating member on the indoor side is fitted to the inside, the set screw is screwed into the female screw hole, and the inner end abuts against the spring receiving surface. Turn little stronger driver, as well as to bite into the set screw to the spring receiving surface, characterized in that so as to prevent the loosening of the set screw by elastic force of the compression coil spring.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
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 or the like that is detachably attached to the inner end portion of the square shaft 2 by a coupling mechanism according to the present invention. The operation member of the indoor side is shown.
[0014]
An outdoor operation member 3 is attached to the outer end portion of the square shaft 2 and is fixed to the square shaft 2 by caulking the pins 4 or the like.
[0015]
The bases of the operation members 1 and 3 on the outdoor side and the indoor side are respectively formed with insertion holes 5 having a square cross section, and both ends of the square shaft 2 are difficult to fit into the insertion holes 5 of the corresponding operation members. This is the same as the conventional coupling mechanism.
[0016]
Further, the square shaft 2 passes through a lock box (not shown), and the central portion thereof is linked to a latch bolt (not shown) via a rotating action piece such as a retractor.
[0017]
As shown in FIG. 1, a female screw hole 6 is formed in the base portion of the operation member 1 on the indoor side. The female screw hole 6 has a set screw in which a slit that engages with, for example, a minus screwdriver is formed at the outer end. 7 is screwed so that its inner end faces the ridge of the angular axis 2.
[0018]
On the other hand, the ridge portion of the square shaft 2 facing the inner end of the set screw 7 is shaved by, for example, plastic working or the meat is stolen to form the spring receiving surface 8.
[0019]
In the illustrated embodiment, the spring bearing surface 8 is shown as a long one extending in the axial direction of the angular shaft 2, but in the principle of the present invention, the dimension in the angular axial direction is at least outside the set screw. What is necessary is just to set larger than a diameter.
[0020]
On the other hand, if the spring receiving surface 8 is made longer for the illustrated embodiment, there is an advantage that it can be applied to doors of various thicknesses.
[0021]
Further, 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 contact the spring receiving surface at the surface but contacts at a point. Another advantage is that the elasticity of the set screw 7 or the amount of plastic deformation is increased, and the coupling between the square shaft 2 and the internal operation member 1 is strengthened.
[0022]
On the other hand, as shown in FIGS. 1 and 3, a small-diameter portion 9 is formed at the inner end portion of the set screw 7. The small-diameter portion 9 has a longer outer diameter than the set screw 7. A smaller compression coil spring 11 is wound.
[0023]
Depending on the length and outer diameter of the small diameter portion 9, the compression coil spring material, wire diameter, number of turns, etc. should be as elastic as possible when compressed as shown in FIG. Of course, it should be set not to exceed the stress.
[0024]
As shown in FIG. 1, the coupling mechanism according to an embodiment of the invention described in claim 1 constructed as described above is configured to fit the indoor operation member 1 to the inner end of the square shaft 2 and to stop it. The screw 7 is screwed into the female screw hole 6 with the small-diameter portion 9 and the compression coil spring 11 set to the square axis 2 side.
[0025]
Then, like an ordinary set screw, when the inner end abuts against the spring receiving surface 8, the driver is turned slightly hard so that the set screw 7 is bitten into the spring receiving surface 8.
[0026]
Then, as shown in FIG. 1, since the compression coil spring 11 wound around the small diameter portion 9 of the set screw is compressed in the axial direction, the elasticity of the compression coil spring 11 urges the set screw 7 outward. Since a strong friction force is generated between the screw threads of the set screw 7 and the female screw hole 6, loosening of the set screw 7 due to secular change, impact and the like is effectively prevented by this friction force.
[0027]
FIG. 4 shows a second embodiment according to the second aspect of the present invention. In this second embodiment, a cup-shaped concave portion 12 coaxial with this is formed at the inner end portion of the set screw 7, and this concave portion is formed. The compression coil spring 7 is mounted on the portion 12.
[0028]
In addition, the compression coil spring 7 in this 2nd Example is set longer than the length (depth) of the recessed part 12, and an outer diameter is set smaller than the internal diameter of a recessed part.
[0029]
The operation and effect of the coupling mechanism according to the second embodiment shown in FIG. 4 is the same as that of the first embodiment shown in FIGS.
[0030]
【The invention's effect】
As is apparent from the above description, in the present invention, a spring receiving surface is formed at the ridge portion of the angular axis, and a compression coil spring is mounted between the spring receiving surface and the set screw. A large frictional force is generated between the screw threads of the set screw and the female screw hole due to the elastic force, and the loosening of the set screw is effectively prevented over a long period of time by this frictional force.
[0031]
In addition, since the compression coil spring is dimensioned to pass through the female screw hole, there is no need to prepare a plate spring as a separate member without forming another female screw hole only in the operation member. Thus, not only can the structure of the coupling mechanism according to the present invention be simplified, but also the manufacture is easy.
[0032]
Furthermore, since the square shaft 2 does not require any other processing such as grooving or division in addition to the formation of the spring receiving surface, various effects such as improvement of the strength and torsional rigidity of the square shaft 2 can be achieved. Play.
[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 transverse cross-sectional view taken along the line II-II in FIG.
FIG. 3 is a partially sectional 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 a partially sectional enlarged side view showing a combination of a set screw and a compression coil spring in a second embodiment of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Operation member 2 Square shaft 5 Insertion hole 6 Female screw hole 7 Set screw 8 Spring receiving surface 9 Small diameter part 11 Compression coil spring 12 Recessed part

Claims (2)

The shaft that penetrates the lock box and that is linked to the latch bolt and the like and the indoor door operation member is kept stable, and the torsional strength and rigidity of the corner shaft are increased. A door operating member on the indoor side that fits with the inner end, and a set screw that passes through the base of the door operating member and faces the inner end to the ridge of the angular axis. The edge of the angular axis facing the surface is cut to form a spring bearing surface, and the dimension of the spring bearing surface in the direction of the axial axis is set to be at least larger than the outer diameter of the set screw, and the inner diameter of the set screw has a small diameter. A compression coil spring longer than the length and smaller than that of the set screw is wound around the small diameter portion, and an indoor operation member is fitted to the inner end of the square shaft, When the set screw is screwed into the female screw hole and its inner end abuts against the spring receiving surface, turn the screwdriver slightly Together so as to bite into the internal thread on the spring receiving face, the operation member and the square shaft coupling mechanism of the door, characterized in that so as to prevent the loosening of elasticity by set screws of the compression coil spring. The shaft that penetrates the lock box and that is linked to the latch bolt and the like and the indoor door operation member is kept stable, and the torsional strength and rigidity of the corner shaft are increased. A door operating member on the indoor side that fits with the inner end, and a set screw that passes through the base of the door operating member and faces the inner end to the ridge of the angular axis. The edge of the angular axis facing the surface is cut to form a spring bearing surface, and the dimension of the spring bearing surface in the direction of the angular axis is set to be at least larger than the outer diameter of the set screw, and the inner end of the set screw is recessed. A compression coil spring that is longer than the length and smaller in outer diameter than the inner diameter of the recessed portion, and an indoor operation member is fitted to the inner end portion of the square shaft, When the set screw is screwed into the female screw hole and its inner end abuts against the spring receiving surface, turn the screwdriver slightly Together so as to bite into the screw to the spring receiving face, the operation member and the square shaft coupling mechanism of the door, characterized in that so as to prevent the loosening of elasticity by set screws of the compression coil spring.

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