JPH07119717A - Fastener and hook and retainer used therefor - Google Patents

Abstract

PURPOSE:To prevent the damage of a hook and a retainer, as components for a fastener, mounted in an aircraft or a vehicle and used for fastening two objects to each other. CONSTITUTION:The spherical surface part of the hook part 32 of a front hook 30 installed on one body 10 has the same radius as that of the spherical surface part of the recessed part 42a in the movable member 42 of a front retainer 40 installed on the other body 21. Thus, the face contact of the front hook 30 and the front retainer 40 is secured to prevent a contact part from damage.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fastening device and, more particularly, to a front hook and a front retainer for a fastening device which is used in equipment mounted on an aircraft or a vehicle and which is required to securely fasten two objects.

[0002]

2. Description of the Related Art FIG. 2 shows a fastening device 20 used in an aircraft-mounted device 10. The fastening device 20 includes a fixed base (another object) 21 for supporting the device (one object) 10 from its bottom surface, and four (only two are shown in the drawings) provided at four lower corners of the fixed base 21. 4), two front hooks 30 ′ (only one is shown in the drawing) attached to both lower front ends of the device 10, and front front ends of the fixed base 21.
Two for holding and fixing the device 10 in the correct position on its front surface in cooperation with 0 '(only one is shown in the drawing)
Front retainer 40 'and two rear retainers 50 (only one is shown in the drawing) attached to the rear ends of the fixing base 21 and holding and fixing the device 10 in the correct position on the rear surface thereof.

Referring also to FIG. 3, a conventional front hook 30 ′ is a flat plate-shaped mounting plate 3 mounted on the device 10.
1 and a cylindrical hook portion 32 'that vertically projects from one end of the mounting plate 31 and engages with a front retainer 40' described later.

Referring also to FIGS. 4 and 5, a conventional front retainer 40 'has a threaded retainer shaft 41 extending in the axial direction, and is movable in the axial direction by being screwed onto the retainer shaft 41. Then, the movable member 42 ′ engaged with the hook portion 32 ′ of the front hook 30 ′ described above is screwed from the head side of the retainer shaft 41 to move the movable member 42 ′ in the axial direction of the retainer shaft 41. It has a threaded portion 43 and a mounting bracket 44 that is rotatably attached to the bottom of the retainer shaft 41 about a rotation shaft 44 a and that attaches the front retainer 40 ′ to the fixed base 21 (FIG. 2). The movable piece 42 'is
As shown in FIG. 5, there is a truncated cone-shaped recess 42'a on the side that engages with the hook portion 32 '.

In the fastening device having such a structure, the aircraft-mounted device 10 is fixed not only in the vertical direction (Y direction in FIG. 2) but also in the front-back direction (X direction in FIG. 2).
Can be fastened on. Further, it can be reliably fixed against vibration.

Other various fastening devices have been proposed.
For example, Japanese Utility Model Application Laid-Open No. 1-94260 (hereinafter, referred to as Prior Art 1) discloses a "two-object fastening device" for fastening a container and a lid covering an upper end opening thereof.
However, the fastening device disclosed in the prior art 1 can perform fastening only in the vertical direction, and can only fix a relatively lightweight object. Further, Japanese Utility Model Laid-Open No. 62-44114 (hereinafter referred to as Prior Art 2) discloses a "lock mechanism" for pressing and fixing an object to be attached using a link mechanism. However, the lock mechanism disclosed in the prior art 2 cannot be used when the fixing base (mounting base) is a thin plate. Further, both of the prior arts 1 and 2 have a drawback that they are less resistant to vibration than the fastening device shown in FIG.

[0007]

As described above, in the conventional fastening device 20, one of the objects (equipment mounted on the aircraft) is used.
The contact portions between the front hook 30 ′ attached to 10 and the front retainer 40 ′ attached to the other object (fixed base) 21 have a cylindrical shape on the front hook 30 ′ side and a truncated cone shape on the front retainer 40 ′ side. Has become. Therefore, the contact portion (movable piece) 42 'between the cylindrical shaft of the cylindrical shape of the contact portion (hook portion) 32' with the front retainer 40 'on the front hook 30' side and the front hook 30 'on the front retainer 40' side. Only when the front retainer 40 'and the front hook 30' are accurately attached to each other so as to match the angle with the hypotenuse of the truncated cone shape of the front retainer 40 'and the front hook 30'. The contact part is a line contact. However, in other cases, the contact portion between the front retainer 40 'and the front hook 30' becomes point contact. As a result, there is a problem that the contact portion (the movable piece 42 'or the hook portion 32') of the front retainer 40 'or the front hook 30' is damaged.

An object of the present invention is to provide a fastening device capable of preventing damage to the hook and retainer components.

[0009]

A fastening device according to the present invention comprises a fixing base for supporting an object from its bottom surface; four antivibration feet provided at four lower corners of the fixing base; and a front surface of the object. Two front hooks attached to both lower ends; two front retainers attached to both front ends of the fixed base, for cooperating with the front hooks to hold and fix the object in the correct position in front of it A fastening device having two rear retainers attached to both rear ends of a fixed base and holding and fixing an object in a correct position on its back surface, each front hook being a flat plate-like attachment plate attached to the object; A front end retainer having a spherical hook portion projecting from one end of the mounting plate and fitted with the retainer, each front retainer having a threaded retainer shaft extending in the axial direction; Combined and axially movable,
A movable member that includes a spherical concave portion that fits with the hook portion of the front hook; and a mounting member that is rotatably attached to the bottom portion of the retainer shaft about a rotation shaft and that attaches the front retainer to a fixed base. It is characterized by having.

The hook according to the present invention is characterized in that it has a flat plate-shaped mounting plate to be mounted on one of the objects; and a spherical hook portion projecting from one end of the mounting plate.

A retainer according to the present invention is a retainer for use with the above hook, comprising: a retainer shaft having an axially extending thread; a retainer shaft that is screwed onto the retainer shaft and is movable in the axial direction; A movable member including a spherical concave portion that fits with the hook portion of the retainer; rotatably attached to the bottom of the retainer shaft about the rotation axis, and the retainer is attached to the other object to be fastened to one object It has a mounting metal fitting for.

[0012]

Embodiments of the present invention will now be described in detail with reference to the drawings.

Referring to FIG. 1, a fastening device according to an embodiment of the present invention includes a front hook 30 and a front retainer 40.
The structure is similar to that shown in FIGS. 2 to 5, except that the structure is different.

The front hook 30 has the same structure as that shown in FIGS. 3 and 5, except that the structure of the hook portion 32 is different. The hook portion 32 projects from one end of the mounting plate 31, fits with a front retainer 40 described later, and has a spherical shape. The hook portion 32 is provided with a hole 32a through which the retainer shaft 41 of the front retainer 40 is inserted.

The front retainer 40 has the same structure as that shown in FIGS. 4 and 5, except that the structure of the movable member 42 is different. The movable member 42 is screwed onto the retainer shaft 41 and is movable in the axial direction, and fits with the hook portion 32 of the front hook 30 described above. Movable member 42
Has a spherical concave portion 42a corresponding to the hook portion 32.

Since the contact surface between the front hook 30 and the front retainer 40 is thus spherical, the hook portion 32 of the front hook 30 and the movable member of the front retainer 40 are always in surface contact with each other. This prevents damage to the components of the front hook 30 and the front retainer 40.

It is needless to say that the present invention is not limited to the above-mentioned embodiments, and that various modifications can be made without departing from the scope of the present invention.

[0018]

As described above, according to the present invention, since the contact surface between the retainer and the hook is spherical, the contact portion between the retainer and the hook is always in surface contact, and the retainer or hook component There is an effect that damage can be prevented.

[Brief description of drawings]

FIG. 1 is a sectional view showing a structure of a front hook and a front retainer used in a fastening device according to an embodiment of the present invention.

FIG. 2 is a front view showing a schematic configuration of a conventional fastening device for fastening an aircraft-mounted device.

FIG. 3 is a perspective view showing a structure of a conventional front hook used in the fastening device shown in FIG.

FIG. 4 is a perspective view showing a structure of a conventional front retainer used in the fastening device shown in FIG.

5 is a cross-sectional view showing structures of a conventional front hook and a conventional front retainer used in the fastening device shown in FIG.

[Explanation of symbols]

 10 Equipment for Aircraft Installation 21 Fixed Stand 30 Front Hook 31 Mounting Plate 32 Spherical Hook Part 32a Hole 40 Front Retainer 41 Retainer Shaft 42 Movable Member 42a Spherical Recess

Claims (3)

[Claims] 1. A fixed base for supporting an object from its bottom surface; four antivibration feet provided at four lower corners of the fixed base; and two fronts attached to lower front ends of the object. Hooks; two front retainers attached to the front ends of the fixed base for cooperating with the front hooks to hold and fix the object in the correct position on its front surface; rear end ends of the fixed base And a rear retainer for holding and fixing the object in a correct position on the back surface thereof, wherein each of the front hooks has a flat plate-like mounting plate to be mounted on the object; A spherically shaped hook portion that protrudes from one end of the plate and that fits with the front retainer, each front retainer having a threaded retainer shaft extending in the axial direction; A movable member that is movable in the axial direction in combination and that includes a spherical concave portion that fits with the hook portion of the front hook; and is rotatably attached to a bottom portion of the retainer shaft about a rotation shaft, A fastening device for mounting the front retainer to the fixed base. 2. A hook comprising a flat plate-shaped mounting plate mounted on one object; and a spherical hook portion projecting from one end of the mounting plate. 3. A retainer for use with the hook according to claim 2, wherein a retainer shaft having an axially extending thread is threaded onto the retainer shaft and movable in the axial direction. A movable member including a spherical concave portion that fits with the hook portion of the hook; and a rotatably attached to a bottom portion of the retainer shaft about a rotation shaft, and the retainer to be fastened to the one object. Retainer, which is characterized by having a mounting bracket for mounting to an object.