JP3145679B2 - Protective structure of screw type fastening structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a protection structure for protecting a fastening structure formed by various screw-type fastening means such as bolts and nuts.

[0002]

2. Description of the Related Art Conventionally, screw-type fastening means having screw portions such as bolts and nuts have been used for various objects from large structures such as steel towers, bridges and buildings to objects around the body. The screw-type fastening means basically has a coupling structure by screwing a male screw and a female screw. According to the screw-type fastening means, for example, to tighten or fix an object between a member having a male thread and a member having a female thread, or a member having a male thread portion and a member having a female thread portion And can be joined together.

[0003] However, such a coupling structure using the screw-type fastening means is released by loosening the engagement between the male screw and the female screw. The fact that the connection structure can be formed and released relatively easily is a great advantage of the screw-type fastening means. On the other hand, because the release is easy,
There is a possibility that the screwing may be loosened by an external force that is artificial or non-artificial and that cannot be normally considered but cannot be avoided, and the coupling structure may be released. Particularly, in a structure or an article for which safety is to be ensured, such release of the connection structure should be avoided.

[0004]

Therefore, in the present invention,
It is an object of the present invention to provide a protection structure for a screw-type fastening structure, which can prevent the coupling structure from being released by an unexpected external force by the screw-type fastening means. Another object of the present invention is to provide a screw member set capable of such protection. Another object of the present invention is to provide a protection member capable of such protection.

[0005]

The present inventor has created the following invention in order to achieve the above-mentioned object of the present invention. That is, the first invention is a structure for protecting a tightening structure formed by screwing a male screw and a female screw, wherein at least one of a male member having the male screw or a female member having the female screw is provided. An engaging portion formed along the outer periphery, and a cylindrical member for internally fitting a screw member having the engaging portion, and two slits along the circumferential direction and parallel to each other, or the two slits. A protection member having a projection formed by punching out a substantially U-shaped slit including a slit, wherein the protection member is screwed into the screw member in a state where the protection member is fitted with the screw member. The projecting portion is rotatably locked to the locking portion with respect to the screw member, and the screw member is formed so that substantially no external force acts on the screw member. According to this invention, since the male member is provided with the protection member formed so that an external force does not substantially act on at least one of the female members, the male member and the female member cannot rotate relative to each other. Therefore, the fastening structure by screwing is not released. According to the protrusion formed by punching out the slit, sufficient locking is possible.

With this configuration, the screw member in which the protection member is inserted can be formed so as to be rotatable with respect to the screw member while being fitted therein. The fact that the protection member rotates with respect to the screw member while the screw member is being fitted inside means that the locking between the locking portion and the protrusion that forms such a fitting state is performed only when the protrusion is a screw. Without substantially applying external force to the member,
It is in a locked state where it is locked by the locking portion of the screw member. That is, while the protruding portion of the protection member is locked by the locking portion of the screw member to prevent the protection member from coming off the screw member, while holding or rotating the protection member,
In this state, the force acting at that time is not transmitted to the screw member (with play).

According to a second aspect of the present invention, there is provided a male member having a male screw and a female member having a female screw, and a locking portion is provided along an outer periphery of at least one of the male member and the female member. There is a cylindrical protection member for internally fitting a screw member having the locking portion, and the protection member can be locked to the locking portion in a state where the protection member has the screw member internally fitted therein. Forming a punched piece, having two slits parallel to each other along the circumferential direction of the protective member, or a substantially U-shaped slit including the two slits,
A screw member set formed by the protection member so that substantially no external force acts on the screw member.
According to this screw member set, the screw member into which the protection member has been inserted can be formed so as to be rotatable with respect to the screw member while internally fitting the screw member, and external force is not substantially transmitted to the screw member. .

In the second aspect of the present invention, since the notch (slit) is formed in the projecting portion of the tubular body by punching a part of the tubular body, the projecting portion is easily formed. In addition, the protection member can be easily prevented from coming off the screw member.

In the first and second aspects of the present invention, it is preferable that the locking portion is a concave portion or a notch provided along the outer periphery of the screw member. Further, it is preferable that the locking portion is a convex portion provided along the outer periphery of the screw member. Further, when the convex portion is provided in the female screw member, it is also preferable to form the female screw member by combining a female member and a female member having an outer diameter larger than that of the female member.
In addition, it is also preferable to form such that a washer having a larger outer diameter than the female screw member is sandwiched therebetween. Further, one convex portion may be formed by combining the flange-shaped ends of the two female members. When the concave portion or the notch portion is provided in the female screw member, it is also preferable to form the female screw member by combining female screws having an outer diameter smaller than that of the female screw member. In addition, it is also preferable to form such that a washer having a smaller outer diameter than the female screw member is sandwiched. Also, the notch-like ends of two female members may be brought together to form one recess, or the notch-like end of one female member may be attached to the end of another female member. In addition, one concave portion may be formed. Furthermore, the end of the female member on the side of the body to be fastened may be formed in a notch shape, and a recess may be formed between the notch-shaped portion and the body to be fastened.

According to a third aspect of the present invention, there is provided a protection member having a screw-type fastening structure for protecting a fastening structure formed by screwing a male screw and a female screw, wherein at least one of a male member and a female member is provided. And two slits parallel to each other along a circumferential direction capable of forming a punched piece pointing toward the screw member, or a substantially U-shaped slit including the two slits. The protection member has a slit and is formed so that substantially no external force acts on the screw member.

Preferably, the protective member further includes one slit near the center of the length of the parallel two slits.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail based on embodiments. The protection structure of the screw-type fastening structure according to the present invention includes a male member, a female member, and a protection member that form the screw-type fastening structure. The male member has a male screw on the shaft. Further, a head may be provided. The shape of the head does not matter. The female member has a female screw on the inner periphery of the hole formed in the base. The base may have a structure in which two or more holes are formed, and each hole has a female screw. The female member may be in a form in which two or more female members are used simultaneously. The shape of the base of the female member is not particularly limited.

[0013] The fastening structure formed by screwing the male screw and the female screw of the male member and the female member is a fastening structure that simply connects the male member and the female member, or a male member and a female member. Includes a fastening structure for fastening an object to be fastened and joined.

The protection member used in the present invention has a fastening structure formed by screwing a male screw and a female screw so that an external force does not substantially act on at least one of the male member and the female member. ing. Here, “substantially no external force acts” means that no external force acts to loosen the fastening between the male screw and the female screw. Specifically, it means that there is no external force for relative rotation acting to loosen the fastening between the male screw and the female screw. Such an external force is a force that fixes one of the male member and the female member and rotates the other. Therefore, it is sufficient if at least one of the male member and the female member cannot be fixed and cannot be rotated. In other words, at least one of the screw members may not be effectively held.

From the above, it is preferable that the protection structure of the present invention is formed by the following screw member and protection member. That is, the protection member is provided at a portion not involved in the screwing of the male member (hereinafter, also referred to as a male non-threading portion) or
A base of a female member (hereinafter, also referred to as a female base) is provided in a tubular body into which it can be inserted. Then, the tubular body may form a fitting state in which at least one of the male non-threaded portion and the female base is rotatable while being fitted therein. Specifically, the cylindrical body is provided with a projecting portion that projects toward the male non-threaded portion or the female base of the screw member inserted therein. On the other hand, the male non-threaded portion and the female base of the screw member are formed with a locking portion such as a convex shape, a concave shape, and a notch shape along the outer periphery thereof so that the protrusion of the cylindrical body can be locked. I do. And
By the locking of the projection and the locking portion, the tubular body forms a rotatable fitting state while internally fitting the male non-threaded portion and the female base portion.

An embodiment of the present invention which can form a fitting state between such a cylindrical body and a male non-threaded portion or a female base will be described.

FIG. 1 shows a protection member 140 according to this embodiment.
You. The protection member 140 shown in FIG.
Accordingly, a punched piece is formed. This protection member 14
0 is slightly larger than the outer diameter of the screw member to be protected
It is formed in a cylindrical shape having an inner diameter. Also screw
The protruding part locked by the locking part on the member side is
Is formed. FIG. 1 (a) and (b)
As shown in the figure, two slots are almost parallel in the circumferential direction.
A slot 142 is formed on the protection member.
That the slit 142 is punched inward
Thereby, the protruding portion 143 is formed. In this case, the slip
Near the center of the length of the slit 142 between the two slits 142
Protruding further inward by inserting a slit
Slits can be formed. Further, FIG.
(C) shows another form of the protruding portion of the protection member 140.
And have two slits parallel to each other in the circumferential direction.
And slits 152
The protrusion 153 obtained by pulling out is shown.

FIG. 2 shows such a protection member 140, for example.
Instead of at least one of the protection members 120 and 130 shown
By using this, the protection structure and screw member set of the present invention can be used.
Is obtained. Hereinafter, the embodiment of FIG. 2 will be described. Figure
In the embodiment 2, the bolt 102 and the nuts 112a, 11
2 is provided. Bolt 102 has a regular hexagonal column head
104, and a male screw is formed on the shaft.
The circumference of the head 104 of the bolt 102 is
A convex portion 106 is formed along the direction. Convex part 106
Is formed substantially at the center of the head 104 in the present embodiment.
ing. In the present embodiment, the head 104 is a male non-threaded portion
, And the convex portion 106 corresponds to the locking portion.

The nuts 112a, 112b are
It has a base with the same outer diameter in the shape of a ring.
In the center, a through hole is formed
An internal thread is formed. These nuts 112a, 1
Between 12b, between the washers 113
I have. Washer 113 is provided at bases 114a and 114b.
It has a larger outer diameter. In this embodiment, the watch
Although a shear was used, use a nut with a larger diameter than the nut.
Can also be. The base corresponds to the female base and the washer 11
3 forms a convex portion 116, and this convex portion 116
Corresponds to the locking part.

For reference, the protective members 120, 130
Will be described, but these protective members 120, 13
Slit configuration at 0 and punched pieces based on this
The form of the (projection) is not an embodiment of the present invention. bolt
The protection member 120 on the side is located outside the head 104 of the bolt 102.
It has an inner diameter slightly larger than the diameter, and all the sides of the head 104
Short enough to cover the body and part of the top
It is formed in a cylindrical shape. The side of the protection member 120
At a predetermined position, that is, when the
Corresponding to the position of the convex portion 106 formed on the head 104
At the height position, a U-shape with a predetermined size (U-shape below
(To open) slits 122 are formed.
The slit 122 is formed in two places on the diameter of the protection member 120.
Has been established. The protection member 130 on the nut side is the nut 1
12a, 112b larger than the outer diameter and washer 1
13 has an inner diameter slightly larger than the outer diameter of
a, 112b and entire side and lower end of washer 113
It is formed in a substantially cylindrical shape so that it can cover a part of the part
ing. A predetermined position on the side of the protective member 130,
That is, the convex portion 116 formed by the washer 113
At the height corresponding to the position
A substantially U-shaped slit 132 is formed to open the character
Have been. The slit 132 has a diameter of the protection member 130.
The upper part is formed in two places. In addition, these protection members 1
Slit forms of 20,130, the implementation of the invention
Not a state.

Next, the bolt 102 thus formed and
Nuts 112a and 112b, washers 113, and
Of the fastening structure formed by the protective members 120 and 130.
The protection structure will be described. First, the body G to be fastened is
, Nuts 112a and 112b, and washer 113
And tighten as usual. Protective member 120 on bolt 2
To the protection member 120 and the slit 122
Punch the inside of the formation part inside, and protect it by punching
The protrusion 123 protruding inside the material 120 is
To be locked. Both slit 122 formation sites
The punched piece forms the projection 123 at
When a predetermined locking state between the projection 123 and the convex portion 106 is obtained,
120 is the bolt 102 with the bolt 102
, A rotatable fitting state is obtained.

Next, the protection member 130 is connected to the nut 112a,
112b and the washer 113,
Punch the slit forming area inward as in
A protruding portion is formed by the punched piece 133, and
A predetermined locking state with the part 106 is obtained, and the protection member 1
30 and nuts 112a, 112b
obtain.

In the above-described fastening structure, the protection according to the present invention is used.
The protection member 140 is used in place of the protection members 120 and 130
This is an embodiment of the present invention. That is, the protection unit
The material 140 is attached to the bolt 102 or the nut
And slits 142 and 15
2 is punched inward to form protrusions 143 and 153.
By doing so, a similar protective structure can be obtained.
In other words, the slip of these protection members 120 and 130 is performed.
By providing slits 142 and 152 in place of
Thus, the protective structure and the screw member of the present invention can be obtained.
In this example, both bolts and nuts have protective materials on both sides.
But with fewer bolts or nuts
By attaching the protective material on one and also fastening this
Protection of the structure is achieved.

In this way, the protection member is attached to the bolt 102.
By attaching 140, the bolt 102 can be manually
And also the gripper cannot be gripped effectively
I have. Therefore, bolt 102 is loosened to loosen the screw.
You can't fix it, and you can turn the bolt 102
Even if the protection member 140 attempts to make the bolt 2
Just spin it around
I can't do that either. Also, nuts 112a and 112b and washers
Attaching the protection member 140 to the cover 113
Thereby, the nuts 112a and 112b can also be effectively gripped.
Can not be fixed or rotated, and screwed together
Can not be relaxed.

In this embodiment, the washer 113
It is said that the convex portion 116 is easily formed on the nut simply by taking care of it.
There are advantages. Also, in the formation of the protrusion by punching,
This is preferable because the protrusion can be easily formed. Also simple
Sufficient locking is possible even with the locking portion of the structure. In addition,
The protruding part formed by punched pieces by punching
The present invention can be applied to various types of convex locking portions.

In this embodiment, the protrusion of the protection member is
Lock the convex locking part on the screw member side (nut)
Formed by a washer sandwiched between
The form of the part is not limited to this.
The protrusion may be formed on the periphery. For example, nut 1
Flange the lower and upper ends of 12a and 112b respectively
To form a convex locking part
Can be. According to this, the flange-shaped protrusions overlap
So you can get reinforced locking
You.

Further , the locking portion may be concave.
For example, as shown in FIG.
12 along the circumferential direction on the outer periphery of the base 14
By forming, the concave portion can be used as a locking portion.
it can. In addition, at least two nuts
And screw each nut to the other nut
The outer diameter of the adjacent side is smaller than other nut parts
By providing a notch like this
Obtainable. That is, screw these nuts together
When the contact is made, the notch
As a result, a concave locking portion is formed between the nuts.
And Cut the adjacent side of one nut
To form a concave locking part
Can also. In addition, tightening by using two nuts
At the same time, it is possible to improve the adhesion. In addition, this
The longer the protective member to be protected, the stronger the protection in the tightened state.
Be transformed into In addition, a smaller diameter between the larger diameter nuts
When the nut is inserted and screwed, the small-diameter nut
It becomes a locking part. In addition, the nut is attached to the end of the fixed body G side.
By providing a notch along the circumference, this notch
It is also possible to form a concave locking portion with the object G to be fastened.
You.

The shape of the protective member is shown in FIG.
Had a cylindrical shape, but as shown in FIG.
With an inner diameter slightly larger than the outer diameter of the
Open edges that can cover the body and part of the top
May be formed in a substantially cylindrical shape. Also, as shown in FIG.
The inner diameter of the bolt is slightly larger than the outer diameter of the head.
And at least the entire bolt head (to the bolt shaft
It can be covered. Key that can cover the
The cap-shaped protection members 20 and 30 may be used. cap
The bolts and nuts end
Also avoids trying to fix and rotate by pressing with
Thus, the protection of the fastening structure is enhanced.

In addition, at least one of the bolt and the nut
By installing protective material, this fastening structure can be protected.
Is achieved. In this embodiment, both the bolt and the nut
The protection has been strengthened because the protective material has been attached.

Further , in one protective member, one member
Of course, providing two or more projections corresponding to the stop
Possible, but two or more protrusions corresponding to two or more stops
Part it is also set kicking things. In addition, one male member
Or provide two or more protective members for female members
Of course, it is possible. Extracted from the above description,
Protective structure of screw type fastening structure, screw member set, protective part
All materials and screw members are included in the present invention.

[0031]

According to the first to fourth aspects of the present invention,
Substantially external to at least one of the male member or the female member
The male member and the female member are
The members cannot rotate relative to each other,
The fastening structure by screwing is not released.

[Brief description of the drawings]

FIG. 1 is a diagram showing an example of an embodiment of a protection member of the present invention.
There is a diagram showing an example in which a protruding portion is formed by punched pieces
(A) to (c).

FIG. 2 is a diagram showing a reference example of a protection structure.

FIG. 3 is a view showing another reference example of the protection structure.

[Description of Signs ] 2, 102 Bolts 12, 112, 212 Nuts 6, 16, 106, 116 Locking portions 142, 152 Slits 143, 153 Projecting portions (punched pieces) 140 Protection member

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-2-35211 (JP, A) JP-A-56-157418 (JP, U) JP-A-63-15320 (JP, U) JP-A-56-157 20072 (JP, U) Fully open sho 56-4667 (JP, U) Fully open sho 63-145013 (JP, U) Fully open sho 63-96314 (JP, U) Fully open flat 3-7518 (JP, U) JP-B-48-25459 (JP, B1) (58) Field surveyed (Int. Cl. ⁷ , DB name) F16B 41/00

Claims (4)

(57) [Claims] 1. A structure for protecting a fastening structure formed by screwing a male screw and a female screw, wherein the structure is provided along an outer periphery of at least one of a male member having the male screw and a female member having the female screw. A locking portion formed by forming a screw member having the locking portion,
A protection member having a protrusion formed by punching out two slits along the circumferential direction and parallel to each other, or a substantially U-shaped slit including the two slits, In a state where the protection member is fitted with the screw member, the protruding portion is locked to the locking portion so that the protection member can rotate relative to the screw member. Protective structure for screw-type fastening structure, formed so as not to act. 2. A male member having a male screw and a female member having a female screw, wherein a locking portion is provided along an outer periphery of at least one of the male member and the female member. A cylindrical protection member for internally fitting a screw member having a punching piece which can be locked to the locking portion when the protection member is internally fitted with the screw member. Two slits parallel to each other along the circumferential direction of the protection member, or a substantially U-shaped slit including the two slits, the screw member by the protection member, A screw member set formed so that substantially no external force acts. 3. A protection member of a screw-type fastening structure for protecting a fastening structure formed by screwing a male screw and a female screw, wherein at least one of a male member and a female member is internally fitted. It has a cylindrical shape, and has two slits parallel to each other along a circumferential direction capable of forming a punched piece directed toward the screw member, or a substantially U-shaped slit including the two slits. And a protection member formed so that an external force does not substantially act on the screw member. 4. The protection member according to claim 3, wherein said protection member further includes one slit near the center of the length of said two parallel slits.