JPH07269547A - Nut - Google Patents

Abstract

PURPOSE:To eliminate a waste of material and to lower the cost, by forming a part requiring no strength with a synthetic resin. CONSTITUTION:This nut is composed of a nut main body 1, screw pieces 5, a spring member 6, and a cap 7. The screw pieces 5, the nut main body 1, and the like which require the strength and the fire-proof property in the fixing time are formed of a metal or a solid material such as a ceramics. The cap 7 and the like which function only in an installing and a removing time, and require no strength, are formed of a synthetic resin.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a work-saving nut that can be inserted in one direction without rotation.

[0002]

2. Description of the Related Art One conventional example is shown in FIGS. The nut body 1 is formed by providing a bolt insertion hole 2 in the center and a pair of inclined guide portions 3 around the bolt insertion hole 2, and a washer 4 is integrally attached to the lower surface of the nut body 1. Screw pieces 5 are slidably mounted on the tilt guide portions 3 of the nut body 1, respectively, and a spring member 6 made of a coil spring is housed in the nut body 1 via a screw piece receiving metal fitting a. A bottom lid b is attached to the upper end.

As another conventional example, an actual Kaihei 1-128 is used.
There is one disclosed in Japanese Patent No. 013, and it is configured as shown in FIG. This is composed of a nut body 1, a screw piece 5 slidably mounted on the tilt guide portion 3 of the nut body 1, a spring member 6 for urging the screw piece 5, and a cap 7 for closing the opening of the nut body 1. Has been done. Still other conventional examples include Japanese Utility Model Laid-Open No. 5-42735 and Japanese Patent Laid-Open No. 2-2.
Some of them are disclosed in Japanese Patent Publication No. 09612, etc., but these are basically the same as those disclosed in Japanese Utility Model Laid-Open No. 1-128013.

[0004]

By the way, as shown in FIG.
In the conventional example shown in FIG. 0 and FIG. 21, parts such as a screw piece receiving metal fitting a are required, the number of parts increases, and assembly is difficult, which is a wall for automation of assembly. Further, each component of the above-mentioned conventional example is formed of a metal material, and there is a problem that some components are too strong in terms of strength, resulting in a large amount of material waste and an increase in cost. Also, Japanese Utility Model Publication No. 1-128013 and Japanese Utility Model Publication No. 5-42735.
The number disclosed in Japanese Patent Laid-Open No. 2-209612 and the like can be reduced because the number of parts is reduced, but these parts are all made of metal materials. However, there is a problem that some parts are too strong in terms of strength, and there is a lot of waste in terms of materials, resulting in an increase in cost.

The present invention has been made in view of the above problems, and an object of the present invention is to reduce cost by eliminating waste of materials by forming parts not required to have strength with synthetic resin. To provide a nut that can be achieved.

[0006]

To achieve the above object, a nut of the present invention comprises a nut body 1 having a bolt insertion hole 2 formed substantially in the center thereof and an inclined guide portion 3 provided around the bolt insertion hole 2. A screw piece 5 having slidably mounted slant guide portions 3 and screw threads 5a which mesh with the screw portions of the bolts are formed at the portions facing the bolt insertion holes 2, respectively.
A spring member 6 for urging the screw piece 5 to project into the bolt insertion hole 2; and a bolt insertion hole 8 formed substantially at the center of the nut body 1 so as to enclose the spring member 6 and the screw piece 5. It is composed of a cap 7 that is fitted to the, and the screw piece 5, the nut body 1, etc., which are required to have strength and fire resistance at the time of fixing, are made of a rigid material such as metal or ceramic, and function only when they are attached and detached. It is characterized in that the cap 7 and the like which are not required to have strength are formed of synthetic resin.

Further, the spring member 6 is formed of a leaf spring material to integrally provide the fulcrum 9 of the spring and the screw piece receiving portion 10, and the fulcrum 9 of the spring and the screw piece receiving portion 10 are orthogonal to each other. It is also preferable that it is provided in. Further, it is also preferable that the spring member 6 is formed of a leaf spring material in an annular shape, and the support portion 11 having a fulcrum 9 at the upper end is bent and projected in a mountain shape.

[0008]

According to the above construction, since the parts such as the cap 7 which function only when attaching or detaching and do not require strength are made of synthetic resin, parts which are not so required to have strength are made of synthetic resin. The cost can be reduced. Further, when the spring member 6 is formed of a leaf spring material, the fulcrum 9 of the spring and the screw piece receiving portion 10 are integrally provided, and the fulcrum 9 of the spring and the screw piece receiving portion 10 are provided in a perpendicular positional relationship. The amount of spring deflection can be minimized.

Further, when the spring member 6 is formed of a leaf spring material in an annular shape and the supporting portion 11 having the fulcrum 9 at the upper end is bent and projected in a mountain shape, the ring diameter is expanded when the spring is bent. It is possible to prevent the bolt from slipping.

[0010]

EXAMPLE First, the example shown in FIG. 1 will be described. The nut is mainly composed of four parts including a nut body 1, a screw piece 5, a spring member 6 and a cap 7. In this embodiment, the nut body 1 is cylindrical and has a bolt insertion hole 2 formed in the center thereof. The bolt insertion hole 2 is formed with a pair of inclined guide portions 3 so as to bulge outward. The guide portion 3 is opened in the bolt insertion hole 2. In the case of this embodiment, an annular plate-shaped washer 4 is integrally provided on the lower surface side of the nut body 1. The nut body 1 and the washer 4 are made of a metal material of sheet metal, and are formed by sheet metal processing.
The screw piece 5 is made of a metal material, and has a screw thread 5a formed on the inner surface thereof to engage with the screw thread of the bolt. The screw piece 5 is slidably mounted on the pair of inclined guide portions 3 of the nut body 1. The spring member 6 is formed of a leaf spring material of metal or synthetic resin in an annular shape, and is placed on the screw piece 5. The cap 7 is formed of a synthetic resin in a cylindrical shape with a bottom, a bolt insertion hole 8 is bored in the upper bottom, and a knob portion 7a is provided so as to project outward. The cap 7 is fitted on the nut body 1 so as to include the spring member 6 and the screw piece 5, and is integrated with the nut body 1 or the washer 4. The cap 7 presses the spring member 6, and the spring member 6 urges the screw piece 5.

FIG. 2 shows another embodiment, in which a spring member 6 is provided integrally with the cap 7 by partially bending the cap 7 so as to bend it. In this case, the cap 7
Is made of synthetic resin, the spring member 6 is also made of synthetic resin. As described above, the spring member 6 is attached to the cap 7.
The number of parts can be reduced by integrally providing.

FIG. 3 shows another embodiment. In the case of this embodiment, the nut body 1 and the washer 4 are formed separately, and the nut body 1 and the washer 4 are integrated later. In this case, the nut body 1 can be made of a metal material and the washer 4 can be made of a synthetic resin. FIG. 4 shows another embodiment. In this embodiment, the side wall portion 12 is integrally provided with the nut body 1 on the outer periphery of the nut body 1. In this case, the nut body 1 and the side wall portion 12 are integrally formed by sheet metal working. Since the side wall portion 12 functions as a part of the cap 7 of the above-described embodiment, in the present embodiment, the cap 7 made of synthetic resin has a disk shape.

FIG. 5 shows another embodiment in which the nut body 1 and the washer 4 are integrally formed by forging. FIG. 6 shows another embodiment of the spring member 6. In the case of the present embodiment, the spring member 6 is formed of a leaf spring material in an annular shape and has a bilaterally symmetrical shape. The spring member 6 is provided with a pair of supporting portions 11 symmetrically and a pair of screw piece receiving portions 10 symmetrically. Further, the support portion 11 and the screw piece receiving portion 10 are provided so as to be in a positional relationship orthogonal to each other. The support portion 11 is formed in a mountain shape, and the apex serves as the fulcrum 9. The screw piece receiving portion 10 is provided so as to be bent upward, and is fitted to the upper end of the screw piece 5 to receive the screw piece 5. When the supporting portion 11 having the fulcrum 9 and the screw piece receiving portion 10 are in the positional relationship of being orthogonal to each other as in this embodiment, the bending amount of the spring portion can be minimized. Further, since the support portion 11 has a chevron shape, it is possible to prevent the annular spring member 6 from expanding when the spring portion bends and the spring member 6 from rubbing against the bolt.

FIG. 7 shows another embodiment of the spring member 6. In the case of this embodiment, a pair of substantially V-shaped spring portions 14 are integrally provided on the annular spring washer 13. FIG. 8 shows another embodiment of the spring member 6. An annular spring washer 13 is provided on the upper and lower sides, and the upper and lower spring washers 13 are connected by a pair of spring portions 14. 9, 10, and 11
Shows another example of the nut, and both the attaching and detaching operations can be performed only by sliding. The nut body 1 is formed in a cylindrical shape with a bottom, and a bolt insertion hole 2 is bored in the center of the bottom wall of the nut body 1. A conical cylindrical opening guide 15 around the bolt insertion hole 2.
And a pair of notches 16 are formed at the upper end of the side wall 1a of the nut body 1. A protrusion 22 is provided on the outer circumference of the nut body 1 for turning it by hand. Cap 7
Is formed in a disk shape, a bolt insertion hole 8 is formed in the center, and a cylindrical fitting portion 17 is formed on the lower surface of the cap 7.
Are provided integrally. The cap 7 is attached to the upper portion of the nut body 1 by inserting the fitting portion 17 into the inside of the nut body 1 from the upper end opening. The pair of screw pieces 5 are rotatably attached to the sliding member 18 and configured to
The interior is slidable inside. The sliding member 18 is composed of a pair of half-split bodies 18a. The pair of half-split bodies 18a sandwich the upper part of a pair of opposing screw pieces 5 and the pivot shaft 20 rotatably mounts the screw pieces 5. I am doing it. A screw thread 5 a is provided on the inner surface of the lower portion of the screw piece 5. Axis 2 of screw piece 5
The 0 portion is the fulcrum B, the outside of the upper end of the screw piece 5 is the force point B, and the screw thread 5a is the action point C.
A knob 21 is provided on the sliding member 18 so as to project outward, and the knob 21 is slidably inserted into the notch 16.

The operation of the nut constructed as described above will be described below. FIG. 12 shows a state where the bolt 23 is attached. The knob 21 is lowered, the lower portion of the screw piece 5 is opened, and the guide 15 is opened as shown by an arrow A in FIG. 12, so that the bolt 23 is inserted into the bolt insertion hole 2 and the bolt insertion hole. Insert into 8,
The entire nut is pushed up as shown by arrow B in FIG. 12, and the knob 21 is raised at an appropriate position to engage the screw thread 5a of the screw piece 5 with the screw thread of the bolt 23 and fix it as shown in FIG. At this time, when a load is applied as indicated by arrow C in FIG. 14, the force point B is pushed downward, the point of action C is pushed inward as indicated by arrow D, and the screw thread 5a meshes with the bolt 23,
The fixed state is retained. When tightening the nut with the nut attached to the bolt 23, the nut is rotated as indicated by arrow E with the knob 21 raised as shown in FIG. At this time, a force as indicated by an arrow F acts on the screw piece 5, and the screw thread 5a can be tightened in a state of being engaged with the bolt 23. When removing the nut,
As shown in FIG. 15, the knob 21 is lowered, the screw guide 5 is opened by the opening guide 15 as shown by an arrow G in FIG. 15, and the nut is pushed down as shown by an arrow H. FIG. 16 is an explanatory diagram showing the positional relationship between the fulcrum a, the force point b, and the action point c. When a downward force acts on the force point b, a force pressing inwardly acts on the action point c as indicated by a broken line. Here, d is the range in which fulcrum a can exist.

FIG. 17 shows another embodiment. Since the lower end of the screw piece 5 is provided with the inclination 25 that matches the edge of the opening guide 15, the screw piece 5 can be easily spread when the bolt 23 is attached to or removed from the bolt 23. FIG. 18 shows another embodiment. Cap 7
A tapered surface 26 is provided on the inner surface of the fitting portion 17. In this case, when a load is applied to the nut at the time of fixing, the screw thread 5a of the screw piece 5 bites the bolt 23 smoothly.

FIG. 19 shows the screw piece 5 made of wire.

[0018]

As described above, according to the present invention, a screw piece, a nut body and the like, which are required to have strength and fire resistance at the time of fixing, are made of a rigid material such as metal or ceramic, and function only at the time of attachment / detachment to improve the strength. Since the caps and the like that are not required are made of synthetic resin, it is possible to reduce the cost by forming parts that are not required to have high strength with synthetic resin. The weight can be reduced.

According to a second aspect of the present invention, the fulcrum of the spring and the screw piece receiving portion are integrally provided by forming the spring member with a leaf spring material, and the fulcrum of the spring and the screw piece are provided. Since the receiving portion and the receiving portion are provided in a positional relationship orthogonal to each other, the amount of bending of the spring can be minimized. Further, in the invention according to claim 3 of the present invention, since the spring member is formed of a leaf spring material in an annular shape, and the support portion having the fulcrum at the upper end is bent and projected in a mountain shape, the spring is bent. The diameter of the ring expands when it is peeled off, which prevents the bolt from slipping.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing an embodiment of the present invention.

FIG. 2 is a perspective view of a cap of another embodiment of the same.

FIG. 3 is a perspective view showing a nut body and a washer of another embodiment of the above.

FIG. 4 is an exploded perspective view showing a nut body and a cap of another embodiment of the same.

FIG. 5 is a perspective view showing a nut body and a washer of another embodiment of the same.

FIG. 6 shows a spring member of another embodiment of the same as above, (a) is a plan view, (b) is a front sectional view, and (c) is a side sectional view.

FIG. 7 shows a spring member of another embodiment of the same as above, (a)
FIG. 6B is a perspective view showing different shapes.

FIG. 8 shows a spring member of another embodiment of the above, (a)
FIG. 6B is a perspective view showing different shapes.

FIG. 9 is an exploded perspective view showing another example of the above.

10 is a perspective view of the assembled state of FIG. 9. FIG.

FIG. 11 is an exploded perspective view of the sliding member and the screw piece of the above.

FIG. 12 is a view for explaining a state when the above nut is attached, wherein (a) is a sectional view and (b) is a front view.

13A and 13B are diagrams illustrating a state when the above nut is tightened, wherein FIG. 13A is a sectional view and FIG. 13B is a front view.

FIG. 14 is a diagram for explaining a state when the nut is fixed,
(A) is sectional drawing, (b) is a front view.

15A and 15B are diagrams illustrating a state when the above nut is removed, in which FIG. 15A is a sectional view and FIG. 15B is a front view.

FIG. 16 is an explanatory diagram illustrating a fulcrum, a force point, and an action point of the above.

FIG. 17 is a perspective view of a screw piece of another example of the above.

FIG. 18 shows another example of the cap of the same, in which (a) is a partially cutaway perspective view and (b) is a sectional view.

FIG. 19 is a perspective view showing a screw piece of another example of the above.

FIG. 20 is an exploded perspective view of a conventional example.

21 is a cross-sectional view of the assembled state of FIG.

FIG. 22 is a cross-sectional view of another conventional example.

[Explanation of symbols]

 1 Nut Main Body 2 Bolt Insertion Hole 3 Tilt Guide Part 5 Screw Piece 6 Spring Member 7 Cap 8 Bolt Insertion Hole 9 Support Point 10 Screw Piece Receiving Part 11 Supporting Part

Claims (3)

[Claims] 1. A nut body having a bolt insertion hole formed substantially in the center thereof and an inclined guide portion provided around the bolt insertion hole, and a portion slidably attached to the inclined guide portion and facing the bolt insertion hole. A screw piece having a screw thread that meshes with the threaded portion of the bolt, a spring member that urges the screw piece so as to project into the bolt insertion hole, and a spring member or a screw member that has a bolt insertion hole formed substantially in the center. It is composed of a cap that is fitted to the nut body so as to enclose the piece, and the screw piece and the nut body that require strength and fire resistance at the time of fixing are made of a rigid material such as metal or ceramic, and then attached and removed. A nut characterized by being formed of a synthetic resin such as a cap that functions only when the strength is not required. 2. The fulcrum of the spring and the screw piece receiving portion are integrally provided by forming the spring member with a leaf spring material, and the fulcrum of the spring and the screw piece receiving portion are provided in a positional relationship orthogonal to each other. The nut according to claim 1, wherein: 3. The nut according to claim 1, wherein the spring member is formed of a leaf spring material into an annular shape, and a supporting portion having a fulcrum at the upper end is bent and projected in a mountain shape. .