JP3101598U - Screw member tightening check tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily and surely visually confirm whether or not a screw member such as a bolt and a nut has been securely tightened immediately at the time of a tightening operation or after the tightening operation. I do.
SOLUTION: Before tightening operation of a screw member, a seat plate portion 2 superposed on a first surface (end surface of a washer) 72a is pressed by a second surface (rear surface of nut) 8a by tightening operation of the screw member. And a receiving portion 3 which is deformed. When the screw member is tightened, the receiving portion 3 is pressed, and the seat plate portion 2 is raised in an inclined posture. By visually observing the seat plate 2 rising in the inclined posture, it can be distinguished from the seat plate 2 in the overlapping posture. The back surface of the seat plate 2 may be colored.
[Selection diagram] Fig. 1

Description

  The present invention relates to a screw member tightening check tool, and more particularly, to a screw member tightening check tool used for checking whether a screw member made of, for example, a bolt and a nut is securely tightened.

  In the case of connecting steel frames using screw members such as bolts and nuts at a building construction site, the connection points may be as many as thousands to tens of thousands. This ensures the tightening of the screw member at the joint. In other words, after the worker has performed the work of tightening the screw member at each position, another worker repeats the work of tightening the screw member tightened at each position again. The security of the tightening was ensured.

  However, conventionally, it is necessary not only to repeat the tightening work of the screw member at the same place at least twice, but also at a construction site or the like, the tightening work is performed at many places as described above. There was a problem that time and effort became enormous.

  The present invention has been made in view of this problem, and is a screw member tightening check tool that can immediately visually confirm whether a screw member such as a bolt or a nut has been securely tightened during a tightening operation. The purpose is to provide.

  Another object of the present invention is to provide a screw member tightening check tool which is excellent in usability and exhibits the same usability as a well-known washer generally used at a tightening portion of a screw member.

  Furthermore, the present invention provides a screw member tightening check tool that can easily confirm whether or not a screw member is securely tightened after the tightening operation of the screw member from near or far away. The purpose is to do.

  The screw member tightening check tool according to the present invention is a screw member tightening check tool interposed between the first and second surfaces that come close to each other by performing a tightening operation on the screw member. The seat plate is overlapped with the first surface before the operation, and the seat plate is displaced in a direction approaching the first surface by being pressed by the second surface by tightening the screw member. A bulge-shaped receiving part that changes the posture from the overlapping posture and rises up to the inclined posture is connected in series, and it is distinguishable from the seating plate in the overlapping posture by visually observing the seat plate rising in the inclined posture. That is, the rising angle of the seat plate portion is determined so as to be able to perform.

  According to this invention, when the screw member is tightened, the receiving portion pressed by the second surface is displaced in a direction approaching the first surface, and the seat plate overlapping the first surface is overlapped with the first surface. The posture is changed from the posture to the rising posture. Then, the tilted posture of the raised seat plate portion can be visually distinguished from the seat plate portion having the overlapping posture. For this reason, it is necessary to easily confirm whether the screw member is securely tightened immediately after the tightening operation or simply after the tightening operation by merely visually observing the posture of the seat plate part by tightening the screw member. Becomes possible.

  In the present invention, the screw member includes a screw shaft portion, and is formed in an annular shape, and the surrounding space is formed in an annular shape on an outer peripheral side of the receiving portion formed as a fitting hole for the screw shaft portion. It is desirable to adopt a configuration in which the above-described seat plate portions are continuously provided. According to this, only by performing the operation of fitting the fitting hole formed by the surrounding space of the receiving portion into the screw shaft portion, the seat plate portion is overlapped on the first surface, and the receiving portion is placed on the second surface. Since it can be faced, the same usability as when installing a well-known washer used to prevent loosening after tightening screw members such as bolts and nuts into the screw shaft part of the bolt is obtained, Usability is improved.

  In the present invention, when the seat plate is raised to the inclined posture so that it can be distinguished from the seat plate in the overlapping posture by visual inspection, the receiving portion elastically presses the first surface. It is desirable that the screw member is not loosened. According to this, not only can the tightening checker confirm that the screw member is securely tightened, but also the tightening state of the screw member is loosened afterwards. That situation is suppressed. For this reason, the function as a locking washer is given to the tightening check tool.

  In the present invention, the seat plate portion has a colored back surface that overlaps the first surface when in the overlapping position with the first surface, and in a state where the posture is changed from the overlapping position and rises to the inclined position. It is possible to adopt a configuration in which the rising angle is determined so that coloring of the back surface can be viewed from the outside. According to this, it is possible to know whether or not the screw member is securely tightened by visually observing the coloring of the back surface of the seat plate that has risen to the inclined posture. Therefore, it is possible to confirm whether or not the screw member is securely tightened in the vicinity of the screw member tightening point. Of course, even from a distance from the screw member tightening point, for example, using binoculars or the like, the seat plate portion may be tightened. There is an advantage that it is possible to visually check the coloring of the back surface to confirm whether or not the screw member is securely tightened.

  In the present invention, a configuration is adopted in which the first surface or the second surface is a surface selected from the back surface of the bolt head, the back surface of the nut, the end surface of the washer, and the surface of the member provided with the screw shaft. It is possible to do. According to this, regardless of whether or not a washer is used, the check tool can be used at the tightening place of the bolt and nut, and also at the tightening place where the nut is screwed into the stud bolt or embedded bolt. Tools can be used.

  As described above, according to the present invention, whether or not screw members such as bolts and nuts are securely tightened can be easily visually inspected immediately after the tightening operation or after the tightening operation. And it is possible to surely confirm. For this reason, the screw member tightening check tool according to the present invention is used in a place where the screw member is tightened at a very large number of places, such as a construction site, so that the screw member tightening work can be performed reliably and efficiently. Can be dramatically improved. In particular, when the back surface of the seat plate is colored, whether or not the screw member is securely tightened can be easily confirmed after the work of tightening the screw member, even from near or far away. Therefore, the above-mentioned effect is more remarkably exhibited. Further, since it is possible to provide a locking function, it can be used as a locking washer.

  FIG. 1A is a partially broken side view showing a use state of the screw member tightening confirmation tool 1 according to the embodiment of the present invention before operation, and FIG. 1B is a use state of the screw member tightening confirmation tool 1 after operation. 2 (A) is a plan view of the screw member tightening check tool 1, FIG. 2 (B) is a cross-sectional view of the screw member tightening check tool 1, and FIG. 3 is an operation of the screw member tightening check tool 1. FIG.

  As shown in FIG. 2, this screw member tightening check tool 1 (hereinafter referred to as “check tool”) is made of sheet metal, and has an annular seat plate 2 and an annular body integrally provided inside the seat plate 2. And a surrounding space surrounded by the receiving portion 3 is formed as a fitting hole 4.

  The checking tool 1 will be described in more detail. The seat plate portion 2 is a flat portion which has a constant width on the outer peripheral side of the receiving portion 3 and protrudes in a flange shape, whereas the receiving portion 3 is a seat plate portion. 2 is formed in a bulging shape that bulges from the inner peripheral portion of the seat plate portion 2 toward the surface thereof, and is connected to an annular inclined portion 31 that rises inclining from the inner peripheral portion of the seat plate portion 2 and the upper end of the inclined portion 31. And a flat portion 32 provided. Then, as shown in FIG. 3, the seat plate 2 is placed on the surface P so as to overlap with the surface P, and the receiving portion 3 is strongly pressed by the force F to displace the receiving portion 3 in a direction approaching the surface P. Then, as the receiving portion 3 is displaced, the seat plate portion 2 changes its posture from the overlapping posture with its inner peripheral portion 2a as a fulcrum, and rises to the inclined posture shown by the virtual line. The rising angle θ of the seat plate portion 2 when the receiving portion 3 is completely displaced increases and decreases by changing the horizontal width and height of the inclined portion 31 of the receiving portion 3 and changing the shape of the receiving portion. Can be adjusted. Therefore, in this embodiment, the rising angle θ of the seat plate portion 2 can be distinguished from the seat plate portion 2 in the overlapping posture by visually observing the seat plate portion 2 raised in the inclined posture. It is set to such an extent that the back surface 21 of the plate portion 2 can be viewed from the outside.

  A use example of the above-described checking tool 1 will be described with reference to FIG.

  In FIG. 1A, a screw shaft portion 61 of a bolt 6 in which a washer 71 is fitted into a hole of a steel material 5 such as a steel frame is inserted from below, and a washer 72 is fitted to the screw shaft portion 61 above the steel material 5. At the same time, the checking tool 1 is fitted through the fitting hole 4, and the nut 8 is loosely screwed into the screw shaft portion 61 from above. In this state, since the back surface 21 of the seat plate portion 2 of the checking tool 1 overlaps the upper surface (first surface) 72a of the washer 72, the back surface 21 cannot be seen from outside. In addition, the seat plate portion 2 has an overlapping posture overlapping the upper surface 72a of the washer 72.

  When the nut 8 is turned from the state of FIG. 1A and the bolt 6 and the nut 8 are securely tightened, the back surface (second surface) 8a of the nut 8 is received by the check tool 1 as shown in FIG. The portion 3 is pressed and displaced in a direction approaching the upper surface 72a of the washer 71. The displacement of the receiving portion 3 at this time may be a displacement caused by the crushing of the receiving portion 3 or a displacement caused by elastic deformation. When the receiving portion 3 is displaced in this manner, the seat plate portion 2 changes its posture from the overlapping posture of FIG. 1A and rises to the inclined posture as shown in FIG. 1B. Therefore, the operator can know that the bolt 6 and the nut 8 are securely tightened by visually observing that the seat plate portion 2 has risen to the inclined posture. After the tightening operation, the bolts 6 and the nuts 8 are securely tightened afterwards by visually observing that the seat plate 2 is in an inclined posture from a distant place using binoculars or the like. Get to know what is being done.

  Therefore, when many parts of steel frames are joined together at the building construction site using bolts, nuts, or other threaded members, another worker must perform the tightening work as before, Instead of performing time-consuming and time-consuming work such as retightening the screw member, the work of visually checking whether the seat plate portion 2 is in an inclined position at each tightening point using binoculars or the like is determined. It is possible to confirm whether or not the bolts and nuts are securely tightened by simply performing the operation. If there is a part that has not been tightened, the tightening operation can be performed again only at that part.

  Also, the back plate 21 of the checking tool 1 can have its back surface 21 colored in a conspicuous color, and in the checking tool 1 in which the back surface 21 of the seat plate portion 2 is colored, the seat plate portion 2 is inclined. When the user is in the posture, the coloring of the back surface 21 can be visually observed, and when the seat plate portion 2 is in the overlapping posture, the coloring of the back surface 21 cannot be visually observed. Therefore, it is possible to visually check the coloring of the back surface 21 of the seat plate portion 2 with the naked eye at a close place and visually with binoculars or the like from a distant place. In such a case, is the bolt and nut securely tightened? It can be more easily confirmed whether or not it is not.

  Further, when the bolt 6 and the nut 8 are securely tightened and the seat plate portion 2 is raised in the inclined posture, a force for expanding the inner peripheral portion 2a of the seat plate portion 2 is generated. The force exerts a restoring force due to a certain elasticity on the receiving portion 3, and the restoring force exerts an effect that the nut 8 is prevented from loosening.

  FIG. 1 illustrates the case where the upper surface 72a of the washer 72 is the first surface and the back surface 8a of the nut 8 is the second surface when the bolt 6 and the nut 8 are tightened. Changes depending on the type of the member to be tightened. For example, when the seat plate 2 of the checking tool 1 is overlapped on the back surface of the nut and the bolt with the head is tightened, the first surface is the back surface of the nut and the second surface is the back surface of the bolt head. When the seat plate 2 of the checking tool 1 is superimposed on the surface of the member provided with the screw shaft and the nut screwed into the screw shaft is tightened, the first surface becomes the surface of the member. The second surface is the back surface of the nut. Therefore, if the first surface or the second surface is selected from the back surface of the bolt head, the back surface of the nut, the end surface of the washer, and the surface of the member on which the screw shaft portion is protruded, the above-described checking tool 1 is used. can do.

(A) is a partially broken side view showing a use state before operation of the screw member tightening confirmation tool according to the embodiment of the present invention, and (B) is a use state after operation of the screw member tightening confirmation tool. It is a fragmentary side view. (A) is a top view of a screw member tightening confirmation tool, (B) is a sectional view of a screw member tightening confirmation tool. It is operation | movement explanatory drawing of a screw member tightening confirmation tool.

Explanation of reference numerals

DESCRIPTION OF SYMBOLS 1 Screw member tightening confirmation tool 2 Seat plate part 3 Receiving part 4 Fitting hole 8a Backside of nut 61 Screw shaft part 72a Upper surface of washer (end surface of washer)
θ Lifting angle of seat plate

Claims (5)

A screw member tightening confirmation tool interposed between the first and second two surfaces that come close to each other by performing a tightening operation on the screw member,
The seat plate is superimposed on the first surface before the screw member is tightened, and the seat plate is displaced in a direction approaching the first surface by being pressed by the second surface by tightening the screw member. A bulging-shaped receiving portion that changes the posture from the overlapping position with one surface and rises to an inclined position is continuously provided, and the seat plate portion in the overlapping position is visually observed when the seat plate is raised to the inclined position. A rising angle of the seat plate portion is determined so as to be distinguishable from the screw member tightening confirmation tool. The screw member includes a screw shaft portion, and is formed in an annular shape, and the surrounding space is formed as a fitting hole for the screw shaft portion. 2. The screw member tightening confirmation tool according to claim 1, wherein the plate portions are continuously provided. The receiving portion elastically presses the first surface to loosen the screw member when the seat plate is raised in the inclined position so that the seat member can be distinguished from the seat plate in the overlapping position by visual inspection. 3. The screw member tightening confirmation tool according to claim 2, wherein the screw member is stopped. In the seat plate portion, the back surface overlapping the first surface is colored when the seat plate portion is in the overlapping position with the first surface, and the back surface is colored when the posture is changed from the overlapping position to the inclined position. The screw member tightening confirmation tool according to claim 2 or 3, wherein the rising angle is determined so as to be visible from the outside. 5. The surface according to claim 1, wherein the first surface or the second surface is a surface selected from a back surface of a bolt head, a back surface of a nut, an end surface of a washer, and a surface of a member on which a screw shaft portion is protruded. A screw member tightening check tool according to any one of the preceding claims.

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