JPH10169632A - Nut or bolt clamp confirmation tool and nut or bolt provided with this tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable confirmation of readily clamped nut or bolt by providing a foot piece extending in a direction opposite to the seat surface of a nut or bolt head, pressing one tool piece on a member surface during clamping work so as to achieve expanding deformation of the member radially outward. SOLUTION: A confirmation tool 3 is a thin metallic plate and consisting of a ring-like base part 7 stacked on one side surface of a washer 2, and four pieces of foot piece 8 radially extending from the base part 7. The foot piece 8 is in a tongue shape and bent relatively to the base part 7 so as to extend toward the side opposite to the washer 2 and in order that the foot piece 8 may be extended and deformed radially outward, an angle formed between the foot piece 8 and the base part 7 is set to an obtuse angle. If a bolt 12 and a nut 1 are mutually screwed in, the foot piece 8 is pressed on a brace 11 surface, expanded and deformed radially outward and if the diagonal sheet 11 is clamped to the extreme extent, the foot piece 8 comes in tight contact with the brace 11 surface. Accordingly, it can be easily recognized visually that the brace 11 has been completed in clamping.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for fastening various members using bolts and nuts, or for fastening various members by screwing bolts into screw holes. The present invention relates to a confirming tool which can visually confirm whether or not the fastening of a member is completed, and a nut or a bolt to which the confirming tool is attached.

[0002]

2. Description of the Related Art Conventionally, when various members are fastened by a nut or a bolt, a wrench (spanner) is engaged with the nut or the bolt as a means for visually confirming whether or not the fastening is completed. Then, it is confirmed that the nut or bolt has been tightened by applying a screwing torque to the nut or bolt, and then the head of the nut or bolt is sprayed or brushed for marking. .

[0003]

This conventional means has the advantage that the fact that it has been fastened can be visually recognized with certainty.
Since a great deal of time is required for confirmation with a wrench and application of paint, there has been a problem that work efficiency is poor. Also, when applying paint by spraying, if multiple nuts or bolts are in close proximity, the paint will be applied to the unidentified nuts or bolts, and it will be possible to determine which nut or bolt has been tightened. There was also a problem that it might disappear.

Further, when the head of a nut or a bolt is directed downward, for example, when fastening various members to the ceiling of a building, paint is applied to an operator during the application operation, or the applied paint is applied. There was also a problem that the working environment deteriorated due to dripping. An object of the present invention is to make it possible to confirm that a nut or a bolt has been tightened without any special operation.

[0005]

SUMMARY OF THE INVENTION For this purpose, the present invention provides a method for mounting a nut directly on a bearing surface of a nut or through a washer so as not to fall off, or directly at a location on a bearing surface of a head of a bolt or By mounting it through the washer so that it cannot fall off,
The present invention has been devised to provide a plate-shaped checking tool that enables a user to visually check whether or not a member has been tightened by tightening a nut or a bolt, and the checking tool includes a nut seat surface or a bolt. It is provided with a foot piece extending in the direction opposite to the seating surface of the head in, and is set so that the foot piece is pressed against the surface of the member and radially outwardly expands and deforms with a fastening operation of screwing a nut or a bolt. ing.

[0006] The present invention also includes a nut or a bolt to which the above-mentioned confirmation tool is attached, as described in claim 2.

[0007]

In this configuration, in fastening a member using a nut or a bolt to which a checking tool is attached, when the nut or the bolt is screwed in, the foot of the checking tool is deformed by hitting the surface of the member. When the nut or bolt is fully screwed and the member is fastened completely, the foot of the check tool is greatly deformed to have a shape different from the original shape.

That is, before and after the nut or bolt is fully screwed, the form of the checking tool changes greatly.
By this change in the form of the checking tool, it is possible to visually check whether or not the member has been fastened by screwing down the nut or bolt. As described above, in the present invention, since the fastening operation of screwing the nut or the bolt to fasten the members can automatically make it visually recognized that the fastening has been completed, the checking operation using the wrench and the coating of the paint as in the related art can be performed. This eliminates the need for a coating operation, and therefore has the effect of significantly improving the efficiency of the fastening operation.

In addition, since no paint is used,
It does not happen that it becomes impossible to determine which nut or bolt is already fastened, and the working environment is not deteriorated at all.

[0010]

Next, embodiments of the present invention will be described with reference to the drawings. 1 to 4 show a first embodiment in which the present invention is applied to a nut, of which FIG. 1A is an exploded perspective view of a nut 1, a washer 2, and a checking tool 3, and FIG.
FIG. 2 is a front view of a state where the three members are incorporated, FIG. 2 is a front sectional view, and FIGS.

A cylindrical hub (projection) 6 is formed on the bearing surface 4 of the nut 1 so as to surround the screw hole 5. The washer 2 and the checking tool 3 are fitted on the hub 6. By swaging the hub 6, the washer 2 and the checking tool 3 are attached to the nut 1 in a rotatable state. As shown in FIG. 2, the washer 2 is formed in a dish shape which is curved in a state in which it is warped to the side opposite to the seating surface of the nut 1. The flat washer of the washer 2 may be used.

On the other hand, the checking tool 3 is made of a thin metal plate, and has a substantially ring-shaped base 7 overlapping one surface of the washer 2 (exposed surface opposite to the nut 1), and four extending radially from the base 7. It consists of a foot piece 8. The foot piece 8 is formed in a tongue shape, and has a base 7 that extends toward the side opposite to the washer 2.
Is bent. In this case, the angle between the foot piece 8 and the base 7 is set to an obtuse angle so that the foot piece 8 expands radially outward and deforms when pressed against the member. A guide piece 9 extending radially outward is provided at the tip of each foot piece 8.
Is formed by bending. The number of the foot pieces 8 is not limited to four, and may be any number.

FIGS. 3 and 4 show examples of the use of the nut 1 with the checking tool 3 described above. In this example, H in the building
This figure shows a case in which a horizontal brace 11 extending horizontally is fastened to a cross beam member 10 made of a mold steel.
The brace 11 can be fastened to the cross beam 10 by threading the nut 1 through the through hole 13 of the brace 11 (the nut 1 and the bolt 12 may be arranged upside down).

In this fastening operation, when the bolt 12 and the nut 1 are screwed into each other, the foot piece 8 of the checking tool 3 is pressed against the surface of the brace 11 and spreads radially outward and deforms. When the bolt 12 is fully screwed and the brace 11 is fastened completely, the foot piece 8 of the checking tool 3 comes into close contact with the surface of the brace 11 as shown in FIG. As described above, since the foot piece 8 is largely deformed and closely adheres to the surface of the brace 11, it can be easily visually confirmed that the brace 11 has been fastened.

When the guide piece 9 is bent at the tip of each foot piece 8 as in the embodiment, the foot piece 8 slides smoothly along the surface of the brace 11, so that the fastening of the brace 11 can be easily performed without damaging the surface. There are advantages that can be done. In addition, when the checking tool 3 and the washer 2 are rotatably mounted on the nut 1 as in the embodiment, only the nut 1 rotates, so that the nut 1 can be smoothly screwed in. There is an advantage that the surface can be prevented from being damaged.

FIG. 5 shows a second embodiment. In this embodiment, the first surface of the nut 1 provided with the flange 1a is provided on the seat surface.
The same checking tool 3 as in the first embodiment is rotatably attached by the same means as in the first embodiment. In addition, as shown by the dashed line in FIG. 5, by bending the foot piece 8 toward the nut 1 after the fastening, the fact that the fastening has been completed may be confirmed more reliably.

FIG. 6 shows a third embodiment applied to the bolt 14.
It is an embodiment. That is, the head 1 of the bolt 14
The washer 2 and the checker 3 are rotatably attached to the portion of the seating surface 16 of the 5 (that is, the lower part of the neck). Washer 2 and confirmation tool 3
As an attaching means, for example, a radially inward tongue may be formed on the inner diameter portion of the checking tool 3, and this tongue may be engaged with the thread of the bolt 14 against its elasticity.

The checking tool 3 may be directly attached to the bolt 14 without using the washer 2. In each of the above embodiments, the foot piece 8 is formed in a narrow tongue shape. However, as shown in the fourth embodiment in FIG.
May be formed so as to spread over the entire circumference of the object.
In this case, the foot piece 8 is divided into a large number by cuts 17 extending radially, and after fastening, the foot piece 8 spreads and deforms as shown by a dashed line and becomes a petal shape as a whole.

Although the embodiments of the present invention have been described above, the present invention can be further embodied in various forms. For example, the confirmation tool may have another shape, and the material may be a processed synthetic resin sheet or an injection molded product. Furthermore, check tool 3
As a means for attaching the washer, the washer 2 and the checker 3 may be magnetized and attached, or may be attached with an adhesive.

Further, it may be configured such that when the nut or the bolt is screwed and cut, the leg of the checking tool is broken, and this structure is also included in the claims. When a washer is provided, a spring washer may be used. Further, it goes without saying that the present invention is not limited to fastening of building members, but can be applied to fastening of various members.

[Brief description of the drawings]

FIG. 1A is an exploded perspective view of a nut, a washer, and a checking tool, and FIG. 1B is a front view of a state where three members are incorporated.

FIG. 2 is a front sectional view.

FIG. 3 is a diagram showing a use state.

FIG. 4 is a diagram showing a use state.

FIG. 5 is a front view of the second embodiment.

FIG. 6 is a front view of a third embodiment.

FIG. 7 is a front view of a fourth embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Nut 2 Washer 3 Checking tool 4 Nut seat surface 6 Nut hub 8 Foot piece 10, 11 member

Claims (2)

[Claims] (1) A nut or bolt is tightened and cut so that it can be visually confirmed whether or not the member has been fastened. A plate-shaped confirmation tool to be attached or fixed so as not to fall off directly or via a washer at the head bearing surface of the bolt, the nut bearing surface or the head seat of the bolt. It is provided with a foot piece extending in the opposite direction to the surface, and is set so that the foot piece is pressed against the surface of the member and radially outwardly expands and deforms with a fastening operation of screwing a nut or a bolt. Nut or bolt tightening confirmation tool. 2. A nut or bolt to which the confirmation tool according to claim 1 is attached.