JP3511533B2 - Door operating member and square shaft coupling mechanism - Google Patents

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 coupling mechanism (hereinafter, simply referred to as coupling mechanism) between a door operating member and a square shaft.

[0002]

2. Description of the Related Art Between a lever handle, a knob and other operating members mounted on a door and one end of a square shaft linked to a latch bolt and the like (one end on the indoor side), there is a utility model Japanese Utility Model Publication No. 58-3251.
No. 6 or Japanese Utility Model Publication No. 62-24687, it is extremely removably fixed by a set screw that is screwed onto an operating member and whose tip is pressed against the receiving groove of the square shaft. It is normal.

Since the tip of the connecting set screw is formed in a conical shape, more specifically, in the shape of a tapered truncated cone, when the operating member and the angular shaft are connected, the conical upper part of the tip of the screw is formed. Sometimes stays in strong contact with the surface of the receiving groove of the square shaft, and the screw is unscrewed and loosened due to vibration or the like.

[0004]

The mechanism for connecting the operating member and the angular shaft of the door according to the present invention can be loosened almost completely when the operating member and the angular shaft are connected by only slightly modifying the shape of the tip portion. There is no such thing.

[0005]

In order to achieve the above object, a connecting mechanism according to claim 1 of the present invention is a rod having a rectangular cross section which fits into an insertion hole of an operating member of a door and traverses a ridge. It has an angular shaft having a V-shaped receiving groove formed on its surface, and a set screw screwed to the operating member of the door so that the conical surface at the tip end is joined to and pressed by the receiving groove of the angular shaft. , The conical surface
It is characterized in that it has a pyramid shape in which many ridges are formed.

The coupling mechanism according to claim 2 of the present invention is a rod having a rectangular cross section that fits into the insertion hole of the operating member of the door, and an angular shaft having a V-shaped cross section at the ridge. And a set screw which is screwed to the operation member of the door, and the conical surface of the tip portion is joined to the receiving groove of the square shaft so as to be pressed, and along the longitudinal direction of the screw on the conical surface. It is characterized in that a large number of ridges are integrally formed.

The term "conical surface" used in this specification includes a surface similar to a conical surface, that is, a conical surface, in addition to a strict conical surface and a pyramidal surface.

[0008]

As shown in FIGS. 1 to 4, in the coupling mechanism according to the present invention, two adjacent ridges 43, 43 (see FIG. 2) or ridges 44 on the tip conical surface 41 of the set screw 4 are provided.
The surface between 44 (see FIGS. 6 and 7) is click-joined to and abuts on the surface of the receiving groove 32 in the square shaft 3.

In other words, as shown in FIG. 8, the distance d from the central axis O of the set screw 4 to the ridge 43 or the ridge 44.
Is an adjacent ridge portion 43 from the central axis in a certain cross section.
43 or the distance e to the conical surface between the ridges 44, 44 is always larger, and when the set screw 4 tries to rotate in the loosening direction, the ridge or ridge of the receiving groove 32 in the square shaft 3 Since the screw 4 is stretched on the surface, the screw 4 is hardly screwed back and loosened by vibration or the like.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to three embodiments shown in the drawings. In the first embodiment shown in FIGS. 1 to 4, reference numeral 1 is one lever handle detachably attached to one end of a square shaft 3 by a coupling mechanism according to the present invention, a knob and other operating members, and 2 is a pin 5. The other lever handle fixed to the other end of the square shaft 3 by caulking or the like, knobs and other operating members, 11 and 21 are the operating member 1,
In the insertion holes for the square shafts, which are respectively provided in 2, the square shaft 3 is linked to a latch bolt or the like at a central portion thereof via a rotating action piece such as a cam (not shown).

Although the angular shaft 3 in the illustrated example is composed of opposed members 31, 31 which are divided into two pairs, they may be formed integrally.

Reference numeral 32 is a receiving groove formed in the angular shaft 3 corresponding to the female screw hole 12 formed in the one operating member 1 and having a V-shaped cross section, for example. When the screw is screwed into the female screw hole 12, the conical surface 41 at the tip end strongly abuts.

The set screw 4 usually does not have a head portion, and has a tool engaging portion 42 into which a tool such as a screwdriver is inserted, on the base end side thereof.

The structure of the assembly of the operating member 1 and the square shaft 3 described above, including the set screw 4, is well known in the art.

The receiving groove 32 is deepened to
A plate-like piece made of a spring material for preventing rattling of the angular axis as disclosed in Japanese Utility Model Publication No. 58-32516 may be inserted. In this case, the plate-shaped piece is pressed by the tip surface of the set screw 4 and elastically deforms.

Next, the essential part of the present invention will be described.
In the coupling mechanism 4 according to the present invention, in the first embodiment shown in FIGS. 1 to 4, the conical surface 41 at the tip portion is provided with a large number of ridges 4.
3 (ridgeline) is formed into a pyramid shape. The pyramidal tip portion 41 naturally includes a pyramid and a truncated pyramid.

In the second embodiment shown in FIGS. 5 and 6, the conical surface 41 at the tip is a conical surface, and a large number of conical surfaces 41 are provided along the length direction of the screw 4 (the generatrix direction of the cone). The ridges 44, 44 are integrally formed. The height of each protrusion 44 may be the same over the entire length or may be changed in the length direction.

In the third embodiment shown in FIG. 7, a large number of ridges 44 are integrally formed on the conical surface 41 at the tip end, which is no different from the second embodiment, but two adjacent protrusions are provided. Article 4
This is different from the second embodiment in that the surface sandwiched by 4 and 44 is a convex curved surface. The surface sandwiched between the two adjacent ridges 44, 44 may be flat.

[0019]

According to the coupling mechanism of the present invention described above, the surface between two adjacent ridges or ridges on the tip conical surface of the set screw is clicked on the surface of the receiving groove on the angular axis. Since it abuts against the screw, the screw does not loosen easily, and rattling of the entire coupling mechanism is prevented.

[Brief description of drawings]

FIG. 1 is a partial vertical cross-sectional side view showing a coupling mechanism assembled by a set screw according to a first embodiment of the present invention.

FIG. 2 is an enlarged cross-sectional view taken along the line II-II of FIG.

FIG. 3 is an enlarged side view of the set screw of the first embodiment.

FIG. 4 is a bottom view thereof.

FIG. 5 is a bottom view showing the set screw according to the second embodiment of the present invention.

FIG. 6 is an enlarged cross-sectional side view of the tip of the set screw.

FIG. 7 is an enlarged transverse cross-sectional view of a tip portion of a set screw according to a third embodiment of the present invention.

FIG. 8 is a diagrammatic enlarged cross-sectional view of a contact portion between a set screw and a receiving groove for explaining the operation of the present invention.

[Explanation of symbols]

1 Operation member 3 square axis 32 receiving groove 4 set screw 41 conical surface (tip) 43 Ridge 44 ridge

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Claims (2)

(57) [Claims] 1. A rod having a rectangular cross section that fits into an insertion hole of an operating member of a door, and is screwed to an operating shaft of a door with an angular shaft having a receiving groove having a V-shaped cross section at its ridge. A door characterized in that it has a set screw in which the conical surface of the tip portion is joined to the receiving groove of the square shaft so as to be pressed, and the conical surface is in the shape of a pyramid in which a number of ridges are formed. Mechanism for connecting the operation member and the square shaft. 2. A rod having a rectangular cross section that fits into an insertion hole of an operation member of a door, a rectangular shaft having a V-shaped cross section at a ridge, and a pyramidal surface of a tip end screwed to the operation member of the door. Has a set screw adapted to be pressed by being joined to the receiving groove of the square shaft,
A coupling mechanism for a door operating member and a square shaft, wherein a large number of protrusions are integrally formed on the conical surface along a length direction of a screw.