JPH0768969B2 - Fastener - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a fastener composed of a male member and a female member, and more specifically, a male member is inserted into a female member and fastened by rotation of about 90 °. A simple fastener that can be used.

[Prior Art] A fastening method for fast and easy fastening and releasing between a container made of plastic or the like and a lid thereof, using a fastener composed of a male member and a female member, with a female member on the container side. There is a method of mounting and inserting a male member into a female member through a hole formed in a lid, then fastening the female member by rotating it by approximately 90 °, and separating it by returning it in the opposite direction.

As such a fastener, a rod-shaped locking means supported by a spring is provided inside a cap-shaped female member, and a steep sloped spiral groove is formed on the shaft portion of a male member having a head and a shaft portion. It is known that the locking means is guided along the spiral groove and is fastened by inserting the shaft portion of the male member into the female member and rotating it (Japanese Patent Laid-Open No. 58-8813). ).

[Problems to be solved by the invention]

In such a conventional fastener, the locking member of the female member is axially moved along the spiral groove of the male member by rotating the male member and the female member by about 90 ° for fastening. Therefore, the axial relative positions of the male member and the female member in the fastened state are almost fixed, and the degree of freedom is extremely small. Therefore, if the thickness of the lid or the distance between the lower surface of the lid and the mounting position of the female member on the container side changes, it is necessary to prepare a male member having a dimension corresponding to that. Further, there is a problem that the fastening force becomes weak due to the fatigue of the spring, which is not preferable for fastening the container in which vibration is applied.

A fastener structure has been proposed in Japanese Utility Model Publication No. 60-65413. This structure consists of a socket part with male and female screws attached, and the socket part allows the female screw to move in the axial direction of the screw. It is integrally formed of leaf spring parts. However, in each of these fasteners, when inserting the male screw into the female screw, it is necessary to move the male screw in the axial direction while observing the matching relationship between the male screw and the female screw. Therefore, there is a drawback that the female screw and the male screw cannot be fastened and fixed with one touch, and the swiftness is lacking.

[Means for solving problems]

Therefore, the present invention solves the above problems, and particularly when a male member is inserted into a female member, a guide surface is provided that is guided very smoothly,
An object of the present invention is to provide a fastener that can fasten and fix a male member and a female member with almost one touch, and the following configuration is adopted to achieve the object.

The present invention provides a fastener composed of a male member and a female member, wherein the male member 1 has a head portion 2 formed at one end of a shaft portion 3, and the shaft portion 3 has a long axis in a cross section. A screw portion 4 is formed on at least a part of the shaft outer peripheral portion on the long axis side of the shaft having a short axis, and the enlarged portion 6 is provided on the front machine long axis side at the other end outer periphery of the shaft portion. The female member 8 is formed with a chevron-shaped guide surface 12 that guides the enlarged portion 6 of the male member 1 to the inner periphery of one end edge of the inner surface of the cylindrical body 9. A pair of insertion portions 22 extending in parallel to the axis, and the pair of insertion portions 22
In the range of the inner periphery thereof, a screw portion 10 projecting axially from the insertion portion 22 and a stopper 11 are provided, and the shaft portion 3 of the male member 1 is inserted into the insertion portion of the female member 8.
The male member 1 and the female member 8 are screwed together by being inserted into the plate 22 and relatively rotated by about 90 °, and the stopper 11
It is characterized in that it is designed to prevent further rotation.

[Examples and functions]

Next, an embodiment of the fastener of the present invention will be described with reference to the drawings.

FIG. 2 (a) is a perspective view showing an example of a male member constituting the fastener of the present invention, and FIG. 2 (b) is a perspective view showing an example of a female member corresponding to the male member.

The male member 1 has a head portion 2 and a shaft portion 3, and the shaft portion 3 has a long axis and a short axis as shown in FIG. 8 which is a sectional view taken along the line VIII-VIII of FIG. 2 (a). It has the cross-sectional shape that it has, and the threaded portion 4 is formed on at least a part of the shaft outer peripheral portion on the major axis side. The screw part 4 may be formed along substantially the entire length of the shaft part 3. Groove 5 on the head 2 for rotation by a driver
Although it is provided, a head such as an enlarged knob or thumbscrew that can be easily rotated may be provided so that the head can be directly rotated. The tip of the shaft portion 3 has a tip portion 7 having an enlarged portion 6.
It is said that. However, the enlarged portion 6 does not necessarily have to be provided, and may have a linear shape.

The female member 8 is formed of a tubular body 9, and a screw portion 10 and a stopper 11 are provided on a part of the inner circumference thereof. Both ends of the cylindrical body 9 are opened so that the shaft portion 3 of the male member 1 can be inserted from the upper side to the lower side in FIG. 2 (b). A cam-shaped guide portion 12 protruding in a chevron shape is provided as needed near the opening on the side where the shaft portion 3 is inserted and above the screw portion 10 on the inner circumference of the cylindrical body 9. An opening 13 is formed in a part of the side wall of the cylindrical body 9 opposite to the side where the screw portion 10 is provided. The opening 13 is provided for die cutting when the female member 8 having the screw portion 10 is cast from a metal material by a die, and is not necessary when cutting. If the opening 13 is not provided, screw it to that part as well.
You may provide 10. A large number of protrusions 14 are arranged on the outer peripheral portion of the cylindrical body 9. By forming a hole on the container side and embedding a female member, the protrusion 14 acts to prevent the female member from slipping out of the hole by the protrusion group biting into the peripheral wall of the hole, so that a large pulling force is applied. It is preferable when it is applied to various materials. 3 to 5 are sectional views of the female member 8 of FIG. 2 (b) seen from different directions, and FIGS. 6 and 7 are also the female member 8 of FIG. 7 (b).
3 is a plan view seen from above (the insertion side of the shaft portion 3) and a bottom view seen from below. As is apparent from FIGS. 6 and 7, in this embodiment, a pair of stoppers 11 are provided on a part of the inner circumference of the cylindrical body 9 so as to be arranged diagonally to each other. .. However, it is not always necessary to provide a pair of stoppers 11, and only one may be provided. Further, the threaded portions 4 and 10 of the male member 1 and the female member 8 may be either right-handed or left-handed screws, but left-handed screws are preferred as described later.

Various materials can be selected for the male member 1 and the female member 8 according to the container to be used, and usually a metal or an alloy is preferably used, but a hard plastic material reinforced with glass fiber or carbon fiber may also be used. it can. For example, in the case of a usual plastic container, zinc alloy is preferably used. In order to manufacture the male member 1 and the female member 8 from these materials, it is possible to use casting, cutting, injection molding or the like which is usually used.

Next, the operation of fastening and releasing the male member 1 and the female member 8 shown in FIGS. 2A and 2B will be described.

The shaft portion 3 of the male member 1 is inserted from the top end portion 7 of the female member 8 from above (or FIG. 6) in FIG. 2 (b). At this time, it is necessary to insert the outer periphery of the shaft portion 3 on the major axis side in alignment with the inner periphery of the cylindrical body 9 in the direction in which the screw portion 10 does not exist. As is clear from the opening on the insertion side in FIG. 6, the opening where the threaded portion 10 (and one end thereof and the stopper 11 provided on the diagonal line thereof) are present is narrowed by the shaft portion 3 Since it is shorter than the outer circumference on the major axis side, the shaft portion 3 cannot be inserted. If an attempt is made to insert the shaft portion 3 with its outer periphery on the major axis side in the direction in which the screw portion 10 exists, the screw portion 10
The tip portion 7 of the shaft portion 3 and the outer periphery on the long axis side subsequent thereto come into contact with the projection of the guide portion 12 provided on the upper part of the guide portion, and they are guided and rotated along the mountain-shaped slope to correct them in the correct direction. Meanwhile, the shaft portion 3 is smoothly inserted at a predetermined position.

After the shaft portion 3 is inserted into the tubular body 9 to the required depth in the relative positional relationship determined in this way, when the shaft portion 3 is rotated clockwise, the threaded portion 4 is screwed into the threaded portion 10 in the tubular body 9. When the rotation starts at 90 °, the threaded portion 4 near the tip of the major axis comes into contact with the protruding stopper 11 to prevent further rotation. In this state, the male member 1 and the female member 8
Since they are closely attached to each other and firmly joined by the screw connection, they do not separate even if a force in the pulling direction is applied.

As described above, the threaded portions 4 and 10 of the male member 1 and the female member 8 may be right-handed threads or left-handed threads. However, when left-handed threads are used, when pulling force or vibration is applied between the two members, The force rotates the shaft portion 3 rightward along the thread groove and further presses it against the stopper 11, and there is no possibility of slipping out.

In order to separate both fastened members, the shaft part 3 is rotated counterclockwise to release the 90 ° return screw connection, and then the shaft part 3 is pulled out from the tubular body 9 in the same relative positional relationship as when inserting. Good.

FIG. 1 is a schematic partial sectional view showing an example in which a lid is fixed to a container using the fastener shown in FIGS. 2 (a) and 2 (b). In order to detachably attach the lid 16 to the upper opening of the container 15 made of plastic or the like, the female member 8 is embedded in the hole 18 of the attaching portion 17 provided inside the container 15, and the lid 16 corresponds to the hole 18. A stepped hole 19 for inserting and locking the male member 1 is provided at a position where the male member 1 is introduced from above through the stepped hole 19 to be fastened and disengaged from the female member 8. Numerals 20 and 21 are O-rings made of a material such as elastic rubber provided as necessary. The O-ring in the stepped hole 19 is for sealing and snapping action, and the O-ring 20 below the lid 16 cooperates with the enlarged portion 6 formed at the tip of the shaft portion of the male member 1,
It is provided to prevent the male member 1 from falling out of the stepped hole 19 when the lid 16 is removed.

The method of embedding the female member 8 in the hole 18 and attaching it is not particularly limited. As a preferable method, for example, a method of embedding by ultrasonic waves or by heating with a heater or the like can be mentioned.

〔The invention's effect〕

In the fastener of the present invention, the enlarged portion 6 is provided at the tip of the male member 1, and the enlarged portion 6 is guided to the chevron-shaped guide surface 12 of the female member 8 to be inserted into the insertion portion 22 in the cylindrical body 9 of the female member 8. Since the male member is inevitably inserted, the male member can be inserted into the female member at any angle, and the male member and the female member can be screwed and fastened by rotating as they are. Is possible with just one touch.

That is, the present fastener has an extremely excellent effect in quick production of fastening.

Further, according to the embodiment in which the opening 9 is provided in the tubular body 9, the threaded portion 10 and the stopper 11 formed on the inner surface of the female member 8 can be extremely easily integrally formed by casting.

[Brief description of drawings]

FIG. 1 is a schematic partial sectional view showing a state in which a lid is fastened to a container using the fastener of the present invention, and FIGS. 2 (a) and 2 (b) are male members (1) constituting the fastener of the present invention. And female member (8)
Of the respective examples, FIG. 3 is a side sectional view of the female member 8 of FIG. 2 (b), and FIGS. 4 and 5 are FIG. 2 viewed from a direction different from that of FIG. b) side partial sectional view of the female member 8, FIGS. 6 and 7 are a plan view and a bottom view of the female member 8 of FIG. 2B. FIG. 8 is a sectional view taken along the line VIII-VIII in FIG. 1 ... Male member, 2 ... Head part 3 ... Shaft part, 4 ... Screw part 5 ... Groove, 6 ... Enlarged part 7 ... Tip part, 8 ... Female member 9 ... Cylindrical body, 10 …… Screw part 11 …… Stopper, 12 …… Guide part 13 …… Opening part, 14 …… Projection 15 …… Container, 16 …… Lid 17 …… Mounting part, 18 …… Hole 19 …… Step hole, 20,21 …… O-ring 22 …… Insertion part

Claims (2)

[Claims] 1. A fastener comprising a male member and a female member, wherein the male member 1 has a head portion 2 formed at one end of a shaft portion 3, and the shaft portion 3 has a long axis in a cross section. And a short shaft, and a screw portion 4 is formed on at least a part of the shaft outer peripheral portion on the long shaft side, and an enlarged portion 6 is provided on the front machine long shaft side on the outer periphery of the other end of the shaft portion. The female member 8 is formed with a chevron-shaped guide surface 12 that guides the enlarged portion 6 of the male member 1 to the inside on the inner periphery of one end edge of the inner surface of the tubular body 9, and the tubular body 9 extends from both ends of the guide surface 12. A pair of insertion parts 22 extending in parallel to the axis of the inner surface, and the pair of insertion parts 22
In the range of the inner periphery thereof, a screw portion 10 protruding from the insertion portion 22 to the axial line side and a stopper 11 are provided, and the shaft portion 3 of the male member 1 and the insertion portion of the female member 8 are By inserting it in 22 and rotating it by about 90 ° relative,
The male member 1 and the female member 8 are screwed together, and the stopper
A fastener characterized in that it is adapted to prevent further rotation at 11. 2. The female member 8 is opposed to the screw portion 10 and the stopper 11 except for the axially opposite end portions thereof, and the cylindrical body 9 is opposed thereto.
The fastener according to claim 1, wherein an opening 13 is formed in the hole, and the female member 8 is an integrally molded body by casting.