JPH10159826A - Screw body with washer and method of jointing thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable the state of joint completion of a screw body by visual observation thereof after completion of the work by fixing the end part of outside coating member by means of a washer seat surface and the surface of a commodity and pulling to break the outside coating member in the circumferential direction by means of the rotation of the screw body during a period until tightening is further progressed to achieve very tight jointing state. SOLUTION: When the end part 2a of an outside coating member 2 makes contact with the surface of a commodity b so as to be in its fixed state by being pinched between the surface of the commodity b and the seat surface 3a of a washer 3, the end part 2a of the outside coating member 2 is also prevented from its movement in the rotational direction together with its axial movement. When the tightening is further progressed up to the final regular tightening by means of a tool 6, a screw body 1 becomes in its tightly clamped state. Then, in the vicinity of the washer 3 and the washer 1a of the screw body 1, a drawn and cut phenomenon occurs on the outside coating member 2 being pinched between the surface of the commodity b and the seat surface 3a of the washer 3, which is divided into a residual part 2c and a separated part 2e. And since they fall down from the screw body 1, it can be recognized by external visual observation that the screw body 1 after the end of clamping is certainly tightened firmly.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a screw body with a washer and a method for fastening the screw body with a washer, which can be easily used to assemble or connect articles so that the tightening state of the screw body can be easily checked.

[0002]

2. Description of the Related Art When a mounting member such as an article is tightened with a large number of bolts and nuts, it is necessary to check whether each nut or bolt is securely tightened or tightened with a predetermined tightening force. That is, do you forget to tighten?
The important thing is.

[0003] Therefore, the present inventor has previously provided a technique in which a bolt or a nut is covered with a synthetic resin film, and it is possible to determine whether tightened or not tightened based on the presence or absence of the synthetic resin film. Was showing. (For example, Japanese Utility Model Application Laid-open No. Sho 62-190114, and Japanese Utility Model Application Laid-Open Sho 63-7
However, these technologies have been developed after completion of the fastening.
Since the operator had manually removed the cover film, the removal of the cover film was troublesome when a large number of bolts and nuts were fastened. Even with eyes, it cannot be easily broken.

[0004] In particular, since the wrapped bolt / nut has a small amount of locking (winding) of the film onto the seat surface of the washer or the bolt / nut, the seat is not completely tightened at the time of fastening. It may come off from the surface, and in the case of a bolt and nut set with a spring washer, it may come off or break off during tightening due to the distortion of the spring washer itself. In this case, the tightening state cannot be confirmed at all. And other various problems.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned problems. When a screw body with a washer is tightened, the end of a jacket member has a washer seat surface and an article surface. The cover member is co-moved by the rotation of the screw body while clamping and fixing the screw member, and when the fastening is completed, the outer member on the screw body side is separated from the screw body by tearing in the circumferential direction near the seating surface of the screw body. Accordingly, it is an object of the present invention to provide a screw body with a washer and a method of fastening the screw body with a washer, by which the appearance of the screw body can be checked by visually checking the appearance of the screw body after the work is completed.

[0006]

Means of the present invention for achieving the above object is to provide a screw body with a washer attached to a bearing surface thereof.
A jacket member formed by forming the washer and the screw body into a cylindrical shape on the outer periphery thereof is attached, the outer member is shrunk to make close contact with the washer and the screw body, and both end portions of the outer member are seated on the washer surface. In the screw body with a washer that is locked to and integrated with the outer end of the screw body, the end of the jacket member that is locked to the seat surface side of the washer,
At the time of fastening an article, when this screw body with a washer is tightened together with another screw body, the washer is fixed between the washer seat surface and the article surface and is formed to a depth that does not come off from the washer due to rotation of the screw body. In the configuration of the screw body.

[0007] Further, the end portion of the jacket member locked to the seat surface side of the washer, when the screw body with the washer is tightened together with another screw body when fastening the article, when the washer seat face and the article face are connected. A screw with a washer which is formed to a depth that does not come off from the washer due to rotation of the screw body, and is provided with a protruding piece protruding outward at an inner peripheral edge at an end of the outer member. In the composition of the body.

Then, a washer is attached to the seat surface of the screw body, and a jacket member formed by forming the washer and the screw body into a cylindrical shape on the outer periphery thereof is attached. And a screw body with a washer integrated by engaging both ends of the outer member with the seating surface of the washer and the outer end of the screw body. When the body is tightened, the end of the jacket member engaging with the washer seat surface is fixed between the washer seat surface and the article surface. A method of fastening a screw body with a washer in which the abutting jacket member is co-moved by the rotation of the screw body, is torn in the circumferential direction near the bearing surface of the screw body, and the jacket member on the screw body side is separated from the screw body. It is in.

In this method, the properties of the outer cover member at which the tearing of the outer cover member occurs are selected in accordance with the fastening torque of the screw body with the washer.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of a screw body with a washer and a method of fastening the screw body with a washer according to the present invention will be described with reference to the drawings.

In FIG. 1 to FIG. 4 and FIG. 6 to FIG.
Is a screw body with a washer, assembling an article b such as a mounting member,
Alternatively, it is used for connection or the like, and is used for a female threaded body such as a nut as shown in FIGS. 1, 2 and 6 to 10, and a bolt etc. as shown in FIGS. 3 and 4. It is basically composed of a screw body 1 composed of a male screw body, a jacket member 2, and a washer 3 attached to the bearing surface 1a side of the screw body 1.

The screw body 1 and the washer 3 and the jacket member 2
As shown in FIG. 1 to FIG. 4, the outer cover 2 is mounted on the outer periphery of the female screw body 1 by a cylindrical member.
Is shrunk by heating or the like so as to be in close contact with the outer periphery of the female screw body 1. Both ends 2 a and 2 b in the axial direction of the jacket member 2 are attached to the bearing surface 3 a of the washer 3 and the outside of the screw body 1. It is locked to the end 1b and integrated.

In particular, the end portion 2a of the jacket member 2 to be locked to the seat surface 3a side of the washer 3 is deeply covered with the seat surface 3a so as to abut against an article b surface such as a mounting member. When tightened, it is sandwiched between the surface of the article b and the bearing surface 3a of the washer 3 to be in a fixed state in which the movement in the rotation direction as well as in the axial direction is prevented.

As described above, the locking state of the end portion 2a does not have to be uniformly applied to the seating surface 3a as long as the fixed state is ensured, and the eccentric state, a part of the eccentric state, or a part of It may be a coating that is missing at intervals,
The degree of this coating is such that the washer 3 and the screw 1 are not easily separated during transportation or storage and are not easily separated, and the coating is made deeper in a range where there is no support for screwing with the other screw. In addition, it is possible to omit the trouble of inspecting the defective coating of the entangled amount.

The cover member 2 may be formed in advance by a conventional molding machine and fitted to the screw body 1 and the washer 3.

The end 2a of the jacket member 2 provided on the bearing surface 3a side of the washer 3 is formed to a depth which does not come off from the washer 3 due to the rotation of the screw body 1 as shown in FIG. In addition, a protruding piece 20 is provided on the inner peripheral edge of the end portion 2a of the outer cover member 2 so as to protrude outward, that is, to the opposite side of the bearing surface 3a with respect to the axial direction of the female screw 1c. Washer 3
This is effective when a disc spring washer is used.

The protruding pieces 20 may be formed in a cylindrical shape provided on the entire inner peripheral edge of the end portion 2a, a not-shown circular shape (not shown), or a plurality of protrusions may be provided at intervals. The protrusion amount can be obtained arbitrarily, and the cylindrical portion may be in a state in which the outer end is obliquely cut off. Alternatively, the shape may be distorted due to a difference in shrinkage during heating.

The washer 3 is made of a conventional spring washer as shown in FIGS.
As shown in FIG. 2, a disc washer 3 or a flat washer (not shown), various spring washers, and the like are used. Further, as shown in FIGS. May be combined.

The shrinkable casing member 2 is formed of a synthetic resin material having a cylindrical shape and having a large shrinkage rate in the circumferential direction and having heat shrinkability, and is formed to have a predetermined thickness.
A colorless or colored film having transparency is suitable.

As shown in FIGS. 2 (a) and 4 (a), a circumferential portion is provided between the bearing surface 1a of the screw body 1 and the washer 3 or at an appropriate place in the middle of the screw body 1. Perforations 4 may be provided at one or a plurality of positions, and if necessary, the perforations 4 can also be inserted in the vertical direction of the screw body 1 to facilitate separation of the jacket member 2. .

Therefore, using the screw body A with a washer as shown in FIG.
In the case of fastening, first, for example, as shown in FIG. 5, a tubular film-shaped outer casing member raw material 2a formed in a tubular shape as shown in FIG. Then, when the jacket member raw material 2a is contracted by heating, the jacket member raw material 2g is, as shown in FIG.
An outer jacket member 2 is formed in close contact with the outer periphery of the screw body 1 and the washer 3.

One end 2a of the jacket member 2 in the axial direction is locked to the seat surface 3a of the washer 3, and the other end 2b is locked to the outer end 1b of the screw body 1. The screw body 1 and the washer 3 are in an integrated state that is not easily detached.

The screw body A with washer thus formed is
As shown in FIG. 6 (a), after the female screw 1c of the bolt 5 is screwed in a predetermined amount corresponding to the surface b of the article to be fastened, the tool 6 (pneumatically driven box-shaped impact wrench) is used. Is used to improve the work efficiency.) (Temporary tightening state), the end 2a of the jacket member 2 locked on the seat surface 3a side of the washer 3 comes into contact with the article b surface and It is fixed between the surface of the article b and the bearing surface 3a of the washer 3.

As shown in FIG. 8, the leading edge of the tool 6 comes into contact with the surface of the washer 3 via the covering member 2, and presses the washer 3 or the covering member 2 on the surface of the washer 3, Screw body 1
May be tightened.

As described above, when the end 2a of the jacket member 2 comes into contact with the surface of the article b and is sandwiched between the surface of the article b and the bearing surface 3a of the washer 3, the outer member 2 is fixed. The end 2a of the member 2 is prevented from moving not only in the axial direction but also in the rotating direction.

In this state, when the screw body 1 is further tightened and fully tightened, the screw body 1 is rotated at a predetermined rotation angle to be in a tightened state.

Then, as shown in FIG.
And the vicinity of the bearing surface 1a of the screw body 1, for example, in FIG.
In the portions indicated by the circles m and n, a tearing phenomenon occurs in the outer cover member 2, and the remaining portion 2d and the separation portion 2e of the outer cover member 2 sandwiched between the surface of the article b and the seat surface 3a of the washer 3 Is divided into

Finally, as shown in FIG. 6 (b), since the screw body 1 falls off from the screw body 1, the operator visually confirms that the screw body 1 after fastening is securely tightened. If the colored outer cover member 2 is used, the visual confirmation of the tightening is further improved.

In particular, according to the screw body A with washer and the method of this embodiment, when the screw body 1 is only partially tightened halfway, the jacket member 2 which is in close contact with the screw body 1 side has a predetermined size. Since the casing member 2 is not rotated at the rotation angle and remains as a whole without being pulled, it can be determined that the tightening is insufficient.

By covering the outer periphery of the screw body 1 with the outer cover member 2, noise caused by interference between the screw body 1 and the wrench when fastening with the impact wrench 6 is reduced. By appropriately selecting conditions such as the material and thickness of the jacket member 2, the effect of further reducing noise can be exhibited.

Further, the clearance between the article b and the washer 3 is also eliminated, so that the screw body 1 is not easily loosened after fastening.
Even when wood or the like is used for the article b, penetration of moisture is prevented by the interposition of the jacket member 2, and disadvantages such as dew condensation and rust are eliminated.

Further, as shown in FIG. 2A, by providing perforations 4, tearing is promoted.

The embodiment of the present invention is applicable to a case where a plurality of washers 3 are set as shown in FIGS. 2 and 4, and a case where a screw body 1 which is a bolt as shown in FIGS. 3 and 4 is used. The same operational effects as in the case of the screw body 1 as the nut described above are exhibited.

FIGS. 7 and 9 show another example of the embodiment of the present invention. The end 2a of the jacket member 2 locked on the seat surface 3a side of the washer 3 has an inner peripheral edge. By providing the protruding pieces 20 protruding outward, tearing of the jacket member 2 at the time of completion of the fastening of the screw body 1 is promoted.

That is, with the screwing of the screw body 1, the end 2a of the covering member 2 on the seating surface 3a radially spreads toward the outer periphery as shown by an arrow p in FIG. 7 (a). The power to work works.

In this case, the jacket member 2 located on the bearing surface of the screw body 1 and the washer 3 may be unnecessarily slack and tearing may not be performed sufficiently.

However, the protruding protruding piece 2 is provided on the inner peripheral edge of the end 2a.
By providing 0, the end portion 2a of the portion is reinforced and the shape retaining force is obtained, and the durability against the above-mentioned force is exerted and the sag does not occur.

In particular, as shown in FIGS. 7 (b) and 9, the bearing surface 3a has a disc spring washer 3 curved in a C-shaped cross section.
The threaded body A with a washer when using
Since the space s is formed between the seat surface 3a of FIG. 7 and the surface of the article b, the degree of adhesion of the disc spring washer 3 to the surface of the article b is reduced during fastening, and similarly, the arrow p in FIG. As shown in (1), a force that spreads radially toward the outer periphery and escapes acts.

However, by providing the protruding piece 20 on the inner peripheral edge of the end 2a, when the fastening progresses, this protruding piece 20
As shown in FIG. 7 (c), the space s is filled to fill the space s.
, The good contact between the surface of the article b and the surface of the disc spring washer 3 is obtained, and the end 2a of the outer cover member 2 comes into contact with the surface of the product b, and the seat between the surface of the article b and the washer 3 A reliable fixing state is obtained by being sandwiched between the surface 3a.

The end 2a of the jacket member 2 is prevented from moving not only in the axial direction but also in the rotating direction. By turning the screw 1 with the tool 6, the inner surface of the tool 6 7 is rotated together with the screw body 1 so that the outer member 2 can be reliably torn at m, n and the like shown in FIG. 6 In the portion pressed by the front end, the wire is uniformly and neatly pulled along the outer periphery of the washer 3 without any uncut portion.

The condition for causing the sheath member 2 to be torn is as follows: at the time of fastening, the elongation of the jacket member 2 is not caused between or near m and n shown in FIG. Or the outer member 2 is made of a hard material, has good adhesion to the screw body 1 and the washer 3, and has a sufficient tension.

FIG. 9 shows that the end 2a of the jacket member 2 has a large friction coefficient in contact with the surface of the article b.
As shown in FIG. 9A, the space s of the disc spring washer 3 is
As shown in (b), the adhesion is increased by filling with the protruding pieces 20.

The contact portion with the surface b of the article is in the washer 3 and has an acute angle x as shown in FIG.

When the fastening starts, the U-shaped disc spring washer 3 is moved from the state of the dimension L1 as shown in FIG.
9B, the washer 3 spreads in the diameter direction, and the distance is L1 <L2.

As a result, a large tensile force acts on the portion between m and n shown in FIG.

The screw member 1 and the washer 3 formed by the outer cover member 2 are located outside the washer 3 and the gap between the two members 1 and 3 is made as small as possible so that they are integrated. There is no slack or room in the portion indicated by the symbol y, and the portion is easily torn. And the like.

The projecting piece 20 is formed by appropriately adjusting the amount of protrusion of the washer 3 when the outer member 2g is packaged on the outer periphery of the screw body 1 as shown in FIG. Arbitrarily obtained.

Further, as shown in FIG. 10, an extending portion 25 having a predetermined size
Is formed, the extension portion 25 fits into the recess 6a of the socket 6 of the impact wrench as a tool, and after fastening, the torn outer covering member 2 comes off together with the socket 6, and Even when the extension portion 25 is used as a knob and the socket 6 is not used, the detachment of the jacket member 2 becomes easy.

Particularly, an effective method according to the present invention is to select a property of the outer cover member 2 at which the outer cover member 2 is torn in accordance with a fastening torque of the screw body A with a washer. It is possible to manage the tightening torque.

That is, when a high tightening torque is required such as a member to be fastened, for example, a metal member or a security member, or when wood or a relatively low tightening torque is sufficient, the state is determined according to the state. By selecting the outer member 2 according to its properties such as the characteristics, thickness, and degree of stretching and shrinking, these different outer members 2 are torn off at each tightening torque, and the specified torque is obtained. It can be confirmed by visual inspection or the like whether or not it has been tightened.

[0051]

According to the present invention constructed as described above, at the time of fastening, the completion of tightening of the screw body can be confirmed by the tearing of the jacket member exteriorly mounted on the screw body.

By attaching a protruding piece to the peripheral edge of the end portion which is locked to the seat surface of the washer, the adhesion of the end portion to the article surface is improved, so that the article and the washer can be more securely fastened at the time of fastening. And the end portion does not rotate together with the screw body, so that the outer member can be torn securely and smoothly. And so on.

[Brief description of the drawings]

FIG. 1 shows a screw body with a washer of a nut according to an embodiment of a screw body with a washer and a fastening method of the screw body with a washer according to the present invention, wherein (a) is a half sectional view and (b) is a bottom view. It is.

FIGS. 2A and 2B show examples of a plurality of washers in the screw body with washers in FIG. 1, wherein FIG. 2A is a half sectional view and FIG. 2B is a bottom view.

3 shows an example of a screw body with a washer of the bolt in FIG. 1, wherein (a) is a half sectional view and (b) is a bottom view.

4 shows an example of a plurality of washers in the screw body with washers in FIG. 3, wherein (a) is a half sectional view and (b) is a bottom view.

FIG. 5 is an explanatory view showing an attached state of a jacket member in FIG. 1;

FIG. 6 is an explanatory view showing a fastening state of the screw body with a washer in FIG. 1;

FIG. 7 shows an example in which a protruding piece is provided at an end of the screw body with a washer in FIG. 1;
(B) is a side view, and (c) is a half sectional view showing a fastening state.

FIG. 8 is an explanatory view showing another example of a torn state of a jacket member of the screw body with a washer in FIG. 1;

FIG. 9 is an explanatory view showing an example of a torn state of a jacket member of a screw body with a washer using a disc spring washer.

FIG. 10 is a half sectional view showing a modified example of a jacket member of the screw body with a washer in FIG. 1;

[Explanation of symbols]

 A Screw body with washer b Article 1 Screw body 1a Seat surface of screw body 1 Outer cover members 2a, 2b Both end portions of outer cover member 2 3 Washer 3a Seat surface of washer 3

Claims (4)

[Claims] 1. A washer is attached to a bearing surface of a screw body, and a jacket member formed by forming the washer and the screw body into a cylindrical shape around the outer periphery thereof is attached. And the both ends of the jacket member are engaged with the washer surface of the washer and the outer end of the screw body to form an integrated screw body with a washer. When the screw body with a washer is tightened together with another screw body at the time of fastening an article, the end of the outer cover member is fixed between the washer seat surface and the article surface, and is detached from the washer by rotation of the screw body. A screw body with a washer, formed at a different depth. 2. A washer is attached to a bearing surface of a screw body, and a jacket member formed by forming the washer and the screw body into a cylindrical shape on the outer periphery thereof is attached. And the both ends of the jacket member are engaged with the washer surface of the washer and the outer end of the screw body to form an integrated screw body with a washer. When the screw body with a washer is tightened together with another screw body at the time of fastening an article, the end of the outer cover member is fixed between the washer seat surface and the article surface, and is detached from the washer by rotation of the screw body. A screw body with a washer formed at a depth different from that of the outer cover member and provided on an inner peripheral edge at an end of the outer cover member with a protruding piece protruding outward. 3. A washer is attached to a bearing surface of a screw body, a jacket member formed by forming the washer and the screw body into a cylindrical shape around the outer periphery thereof is mounted, and the washer and the screw body are contracted. The screw body with a washer integrated by bringing the outer cover member into close contact with the outer end of the screw body by engaging both ends of the outer member with the seat surface of the washer. When the body is tightened, the end of the jacket member engaging with the washer seat surface is fixed between the washer seat surface and the article surface. With a washer, the abutting jacket member is co-moved by the rotation of the screw body, is torn in the circumferential direction near the bearing surface of the screw body, and the jacket member on the screw body side is separated from the screw body. How to fasten the screw body. 4. A washer is attached to the bearing surface of the screw body, and a jacket member formed by forming the washer and the screw body into a cylindrical shape on the outer periphery thereof is attached. The washer and the screw body are contracted by shrinking the jacket member. The screw body with a washer integrated by bringing both ends of the covering member into close contact with each other and engaging the both ends of the washer with the seat surface of the washer and the outer end of the screw body. When tightened, the end of the jacket member that engages with the washer seat surface is fixed by being sandwiched between the washer seat surface and the article surface, and abuts on the outer peripheral portion of the screw body while further tightening progresses to tightening. The method of fastening a screw body with a washer in which the outer member is co-moved by the rotation of the screw body and is torn in the circumferential direction near the bearing surface of the screw body to separate the outer member on the screw body side from the screw body. The torsion of the jacket member according to the fastening torque of the screw body with washer. Fastening method washer threaded body characterized by selecting the properties of the outer target member to generate.