JP6431358B2 - Fixing for door handle installation - Google Patents

Description

The present invention relates to a fixture used when a door handle is rotatably attached to a predetermined position of a door.

As described in Japanese Patent Laid-Open No. 2008-174928 (Patent No. 4463829) in [0002] to [0004], the prior art prior to the invention of this publication has the following problems.

It is necessary to connect the first pedestal and the second pedestal for attaching the door handle to the left and right side surfaces of the door in which the latch case is embedded. At that time, the operator turns the screwdriver in the tightening direction from the second pedestal side to allow the male screw to enter the screw pipe (referred to as “boss” in the above-mentioned publication) of the first pedestal. The more the driver is turned in the tightening direction, the more the first pedestal is attracted to one door surface and the second pedestal is attracted to the other door surface, and the more firmly fixed.

However, the tightening strength of the first and second pedestals relies on the operator's intuition. Therefore, depending on the worker, there is a case where the screw pipe is strongly tightened in order to secure the fixing. In this case, the screw pipe may be damaged. In order to prevent the screw pipe from being damaged, a resin having a high bending elastic modulus or a metal having a high mechanical strength may be used as the material. However, even if such a material is used, the operator may tighten more strongly in order to secure the fixing, and in this case, there is a problem that deformation such as a dent of the door occurs.

In order to solve this problem, in Japanese Patent Application Laid-Open No. 2008-174928, the length of the female screw is increased along the axial direction from the tip on the male screw insertion side to the disk of the first pedestal. Proposals are made to form slits that exceed the length.

By doing so, if the screw is tightened too much, the screw pipe side loses to the tightening force, the slit opens momentarily in the radial direction, the engagement is disengaged, and then the engagement is restored by the spring force of the slit. Fixed in position. Even after tightening, the screw pipe side lost to the tightening force as described above, and the slits opened momentarily in the radial direction, disengaging the screws, and then the spring engagement of the slits returned a full amount of screw engagement. Fixed in position. That is, when the tightening force exceeds a certain level, the slit opens and more torque than necessary is released. At this time, the operator can feel the `` click '' sound and vibration that disengage the screw, so that even if careful tightening is not performed, an over-tightening signal will be received, the tightening operation will be stopped, and an appropriate Tightening is complete.

JP 2008-174928 A

The object of the present invention is to prevent excessive tightening of the screw as in the invention of JP 2008-174928, but by another approach.

The present invention is a door handle mounting fixture having a first pedestal 1, a second pedestal 2, and a male screw 6 connecting these two pedestals, the first pedestal 1 being an operating lever. A disk 11 having a central through hole 12 for insertion and two screw pipes 13 protruding from the disk 11, and the second base 2 has a disk having a central through hole 22 for inserting an operation lever. 21, has a through hole 23 of the male screw insertion provided in the circular plate 21, the male screw 6 is made of synthetic resin having a flexible, a head 61, a head 61 downwardly The shaft portion 63 extends and a thread 64 provided at the tip of the shaft portion, and the tip of the shaft portion is partially removed over a length exceeding the axial length in which the thread 64 is formed. A cut portion 65 is provided (claim 1).

Preferably, the cut portion 65 is formed by removing about a semicircle of the shaft portion 63 (Claim 2).

Preferably, a reinforcing collar portion 66 is formed in a streak shape at the central portion of the cut portion 65 (Claim 3).

Preferably, the flange portion is substantially the height of the shaft portion 63 at the starting point of the cut portion 65, but gradually decreases toward the tip of the shaft portion (claim 4).

  According to the first aspect of the present invention, if the male screw 6 is tightened too much, the tip thread 64 of the male screw bends from the female screw 14 of the screw pipe 13 and emits a “click” sound, and starts spinning. In this way, once tightening has reached a certain length, it cannot be tightened any further. As a result, excessive tightening of the screw can be prevented.

  According to the second aspect of the present invention, a preferable size of the cut portion 65 is shown.

  According to the invention of claim 3 of the present invention, the streak-like collar portion 66 functions as a male screw reinforcing portion provided with the cut portion 65.

  According to the invention of the fourth aspect of the present invention, since it becomes thinner toward the tip, a space for sufficiently bending the tip of the male screw can be obtained.

  Embodiments of the present invention will be described below with reference to the accompanying drawings.

It is a figure explaining the state which attached the door handle so that rotation with respect to the predetermined position of a door is possible using the fixing tool of this invention. It is a perspective view of the 1st base and the 2nd base. (A) Rear view, (b) Left side view, (c) Top view, (d) Right side view, (e) Front view, (f) Bottom view, (g) It is a cross-sectional view of c). (A) Rear view, (b) Left side view, (c) Top view, (d) Right side view, (e) Front view, (f) Bottom view, (g) First stage pedestal (g) It is a cross-sectional view. (a)-(c) is a perspective view which shows three steps of the state which has inserted the external thread in the thread pipe of the 1st base.

<Fixing tool>
The fixture of the present invention has a first pedestal 1 and a second pedestal 2. As shown in FIG. 1, a first pedestal 1 and a second pedestal 2 for attaching a door handle 5 are connected to the left and right side surfaces of a door 4 in which a latch case 3 is embedded, and the door handle 5 is rotatably attached. Yes. The door handle 5 is not limited to the illustrated knob, and a sliding door handle, lever handle, push-pull handle, and the like can also be used.

  When the outdoor knob or the indoor knob is rotated, the latch actuating rotation member is rotated via the operation lever by a mechanism known per se (not shown) and connected to the rotation member. The latch 31 is retracted against the spring. References showing such a mechanism include, for example, utility model registration No. 2559171, Japanese Utility Model Publication No. 54-170995, Japanese Utility Model Publication No. 58-5821.

  As shown in FIGS. 2 and 4, the first pedestal 1 includes a disk 11 having a central through hole 12 for inserting an operation lever (not shown) and two screw pipes 13 protruding from the disk 11. Have. The disk 11 and the screw pipe 13 may be integrally formed, or two parts may be combined. The second pedestal 2 is a disc 21 having a central through hole 22 for inserting an operation lever (not shown), and is provided with two through holes 23 for inserting male screws.

  The screw pipe 13 can be made of metal, resin, or a composite material of resin and metal. The screw pipe 13 may have any hardness as long as it can be cut with a tap. Further, when the material of the screw pipe is resin, the bending elastic modulus is preferably 1.8 GPa or more, and preferably 2.0 GPa or more from the viewpoint of obtaining sufficient tightening strength and spring force by slit formation. Examples of the resin include polyacetal and nylon.

<Male thread>
The feature of the present invention is the material and structure of the male screw 6 used for fastening the first pedestal 1 and the second pedestal 2.

The material of the male screw 6 needs to be a flexible material that bends when a large force is applied, and synthetic resin is most preferable. Examples of the synthetic resin include polyacetal and nylon.

  As shown in FIGS. 3A and 3B, the male screw 6 is provided at a head portion 61 having a cross hole 62 that engages with a driver tip, a shaft portion 63 that extends downward from the head 61, and a shaft portion tip. It has a thread 64.

As shown in FIGS. 3 (a), (b), (d), and (f), the tip of the shaft 63 is cut out by about a semicircle over a length exceeding the axial length in which the thread 64 is formed. The cut portion 65 is formed. A reinforcing collar 66 is formed in a streak shape at the center of the cut portion 65. The height of the collar portion 66 is substantially the height of the shaft portion 63 at the starting point of the cut portion 65, but gradually decreases toward the tip of the shaft portion. In an embodiment, the total length of the male screw 6 is 25 mm, of which the length (height) of the head 61 is 4 mm and the shaft portion 63 is 21 mm. Of the shaft portion, the length of the cut portion 65 is 10 mm, and the threaded portion 64 is 6 to 8 mm at the tip. The diameter of the shaft portion 63 that is not the cut portion 65 is 3.25 mm.

<Tightening method>
Based on FIG. 5, a method for fastening the male screw 6 to the screw pipe 13 will be described. The latch case 3 is attached to the door 4 (FIG. 1), and the first pedestal 1 and the second pedestal 2 are applied from both sides of the door 4. Next, the male screw 6 is screwed into the female screw 14 of the screw pipe 13 through the male screw insertion hole 23 of the second base 2 (FIG. 5 (a)) and tightened with a screwdriver (not shown) (FIG. 5 (b)). .

When the male screw 6 is tightened too much, the tip thread 64 of the male screw bends from the female screw 14 of the screw pipe 13 and makes a “click” sound, and starts spinning (FIG. 4 (c)). In this way, once tightening has reached a certain length, it cannot be tightened any further. As a result, excessive tightening of the screw can be prevented.

DESCRIPTION OF SYMBOLS 1 1st base 11 disc 12 center through-hole 13 screw pipe 14 female screw 2 2nd base 21 disc 22 center through-hole 23 male screw insertion hole 3 latch case 31 latch 4 door 5 door handle 6 male screw 61 head 62 cross Hole 63 Shaft 64 Thread 65 Cut part 66 Bump

Claims (4)

A door handle mounting fixture having a first pedestal (1), a second pedestal (2), and a male screw (6) connecting these two pedestals (1, 2),
The first pedestal (1) has a disc (11) having a central through hole (12) for inserting an operation lever, and two screw pipes (13) protruding from the disc (11).
The second pedestal (2) includes a disc (21) having a central through hole (22) for inserting an operation lever, and a through hole (23) for inserting a male screw provided in the disc (21). Have
The male thread (6) is made of synthetic resin having a flexible, a head (61), the shaft portion extending downwardly from the head (61) and (63), provided on the shaft tip With thread (64),
For attaching the door handle, the tip of the shaft part is partially removed to form a cut part (65) over a length exceeding the axial length in which the thread (64) is formed. Fixing tool.   The fixture according to claim 1, wherein the cut portion (65) is obtained by removing approximately a semicircle of the shaft portion (63). Central portion in the longitudinal direction, a fixture of claim 1 or 2, wherein ridges of the reinforcing streaked (66) is formed of the cutting portion (65). While projecting the highest position of the ridge portion (66) is equal to the starting approximately the shank at the point (63) the surface height of the cut portion (65), wherein which is gently lowered toward the distal end of the shaft portion Item 3. A fixture according to item 3 .

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