Marking auxiliary tool for fastening member

Abstract

To provide a marking auxiliary tool for a fastening member capable of linearly marking so as to cause directions of lines and marking positions to be always the same even in the marking by means of hand-writing.SOLUTION: A marking auxiliary tool for fastening member includes: an attachment part 11 which can attachable to a fastening member 5 composed of a bolt 2, a nut 3 and washer 4 which are fastened to a steel material 1; and an extending part 12 which extends planarly from the attachment part 11 along a surface of the steel material 1. In addition, the attachment part 11 and the extending part 12 are provided with an opening part 13 which exposes out a part of the fastening member 5, the attachment part 11 is attached to the fastening member 5, in a manner of allowing for marking over the fastening member 5 and the steel material 1 with a pen P with a tip thereof in contact with and along a first edge part 13a or a second edge part 13b of the opening part 13, thereby, even in the marking by means of hand-writing, marking can be performed linearly so as to cause directions of lines and marking positions to be always the same, and marking operation can be easily and quickly performed.SELECTED DRAWING: Figure 5

Description

Technical Field

[0001] The present invention relates to a marking aid for fastening members for assisting the marking operation on a fastening object and fastening members such as bolts and nuts used in member joining portions of structures such as bridges.

Background Art

[0002] Conventionally, in member joining portions of structures such as bridges, there are many portions where steel materials are fastened by fastening members such as bolts and nuts. However, since bolts and nuts may loosen over time, it is necessary to periodically check whether there is any looseness. In this case, paint is continuously marked linearly across the fastened bolts, nuts, and steel materials, and it is checked whether there is any displacement of the white line during inspection (see, for example, Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] By the way, it is desirable that the marking is always drawn linearly with the same length so as to be compatible with, for example, diagnosis by image recognition. Conventionally, an operator marks one by one by hand using, for example, a pen with white ink. However, it is difficult to mark linearly by hand, and there is a problem that there are variations in the line direction and marking position.

[0005] The present invention has been made in view of the above problems, and an object thereof is to provide a marking aid for fastening members that can mark linearly so that the line direction and marking position are always the same even in the case of marking by hand.

Means for Solving the Problem

[0006] The marking aid for fastening members of the present invention is a marking aid for fastening members for linearly marking with a pen on the surface of a fastening member fastened to a fastening object so as to span the fastening member and the fastening object. It includes an adherend portion formed so as to be attachable to the fastening member, and an extending portion that extends flat from the adherend portion along the surface of the fastening object. An opening for exposing a part of the fastening member to the outside is provided in the adherend portion, and the opening is formed so that marking can be performed with a pen across the fastening member and the fastening object while following the tip of the pen along the edge thereof.

[0007] By doing so, while attaching the adherend portion to the fastening member and marking across the fastening member and the fastening object while following the tip of the pen along the edge of the opening, it becomes possible to perform linear marking so that the direction of the line and the marking position are always the same even in the case of handwritten marking.

Effect of the Invention

[0008] According to the present invention, even in the case of handwritten marking, it is possible to perform linear marking so that the direction of the line and the marking position are always the same. Therefore, the marking work can be performed easily and quickly, and for example, the marking work on a large number of fastening members at the member joint portion of a steel bridge can be performed extremely efficiently.

Brief Description of the Drawings

[0009]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Mode for Carrying Out the Invention

[0010] Figures 1 to 8 show an embodiment of the present invention, and illustrate a marking aid for a fastening member for assisting the marking operation on a fastening member such as a bolt, nut, etc. and an object to be fastened, which is used for a member joint part of a structure such as a bridge.

[0011] The steel material 1 as the object to be fastened shown in the figure is fastened by a fastening member 5 composed of a bolt 2, a nut 3 and a washer 4, and a washer 4 is interposed between the nut 3 and the steel material 1. The tip of the bolt 2, the nut 3 and the washer 4 protrude from the surface of the steel material 1, and after painting these surfaces, a linear marking M is applied across the bolt 2, the nut 3, the washer 4 and the steel material 1, for example, by a pen P with white ink.

[0012] The marking aid 10 of the present embodiment includes an adherend portion 11 formed so as to be attachable to the fastening member 5, and an extension portion 12 extending flat from the adherend portion 11, and the adherend portion 11 and the extension portion 12 are integrally formed of synthetic resin. Further, an opening 13 for exposing a part of the circumferential direction of the fastening member 5 to the outside is provided in the adherend portion 11 and the extension portion 12.

[0013] The adhered portion 11 is composed of a first end surface portion 11a formed in a flat plate shape so as to cover one end surface of the bolt 2, a first circumferential surface portion 11b formed in a cylindrical shape so as to cover the outer circumferential surface of the bolt 2, a second end surface portion 11c formed in a flat plate shape so as to cover one end surface of the nut 3, a second circumferential surface portion 11d formed in a cylindrical shape so as to cover the outer circumferential surface of the nut 3, and a third circumferential surface portion 11e formed in a cylindrical shape so as to cover the outer circumferential surface of the washer 4. The outer circumferential surfaces and inner circumferential surfaces of the respective circumferential surface portions 11b, 11d, 11e are each formed in a circular shape. Further, the adhered portion 11 is formed such that the distance between its inner surface and the outer surface of the fastening member 5 is 1 mm or more and 5 mm or less. In this case, the said distance is the distance from the outer surface of the non-painted fastening member 5 and is the minimum distance from the nut 3 (the distance from the hexagonal corner of the nut 3).

[0014] The extending portion 12 is formed in a circular flange shape and extends outward from the lower end in the drawing of the adhered portion 11 so as to cover the surface of the steel material 1.

[0015] The opening 13 is formed so as to form a sector across the first end surface portion 11a, the first circumferential surface portion 11b, the second end surface portion 11c, the second circumferential surface portion 11d, the third circumferential surface portion 11e, and the extending portion 12. Further, the opening 13 has a first edge portion 13a that linearly extends in the radial direction and the axial direction of the adhered portion 11 from the center of the first end surface portion 11a to the extending portion 12, and a second edge portion 13b that linearly extends in the radial direction and the axial direction of the adhered portion 11 from the center of the first end surface portion 11a to the extending portion 12 so as to form a predetermined angle θ (90° in the present embodiment) with the first edge portion 13a in the circumferential direction of the adhered portion 11. The opening 13 also has a pair of third edge portions 13c that extend in parallel with a space W slightly larger than the width of the tip of the pen P with respect to the first edge portion 13a and the second edge portion 13b in the extending portion 12, and a fourth edge portion 13d that extends in an arc shape along the outer circumferential surface of the washer 4 from one end of one of the third edge portions 13c to one end of the other third edge portion 13c. That is, the opening 13 is formed by the portion surrounded by the respective edge portions 13a, 13b, 13c, 13d.

[0016] When performing the marking operation using the marking aid 10 configured as described above, the marking aid 10 is attached to the fastening member 5 as shown in FIG. 4. As a result, as shown in FIG. 5, the fastening member 5 and the steel material 1 are covered by the attachment portion 11 and the extension portion 12, and a part of the fastening member 5 and the steel material 1 is exposed to the outside from the opening portion 13.

[0017] Next, as shown in FIG. 5, insert the tip of the pen P between one end of the first edge portion 13a and the third edge portion 13c in the extension portion 12, and move it toward the other end side of the first edge portion 13a while bringing the tip of the pen P into contact with the first edge portion 13a. At this time, since the movement starts while the tip of the pen P is constrained between the first edge portion 13a and the third edge portion 13c, the tip of the pen P is linearly guided in the traveling direction without deviating to the opposite side of the first edge portion 13a.

[0018] Subsequently, as shown in FIG. 6, by moving the tip of the pen P to the other end of the first edge portion 13a in the order of the steel material 1, the washer 4, the nut 3, and the bolt 2, the ink of the pen P adheres to the surfaces of the steel material 1, the washer 4, the nut 3, and the bolt 2, and a continuous linear marking M is applied across the fastening member 5 and the steel material 1.

[0019] In addition, in this embodiment, the case where marking is performed along the first edge portion 13a is shown, but marking may be performed along the second edge portion 13b. That is, according to the dominant hand of the operator, the direction of marking, etc., the more convenient one of the first and second edge portions 13a and 13b can be selected.

[0020] Further, in this embodiment, the marking aid 10 is illustrated as being attached to the fastening member 5 and the steel material 1 from above in the drawing. However, the attachment direction of the marking aid 10 and the orientation of the opening 13 are not limited to those illustrated in this embodiment, such as when attaching it to a horizontal bolt or the like from the side.

[0021] Thus, according to the marking aid 10 of the present embodiment, the adhering portion 11 that can be adhered to the fastening member 5 composed of the bolt 2, nut 3, and washer 4 fastened to the steel material 1, and the extending portion 12 that extends in a flat plate shape from the adhering portion 11 along the surface of the steel material 1 are provided. An opening 13 is provided in the adhering portion 11 and the extending portion 12 to expose a part of the fastening member 5 to the outside. The adhering portion 11 is adhered to the fastening member 5, and while the tip of the pen P is guided along the first edge 13a or the second edge 13b of the opening 13, marking is performed across the fastening member 5 and the steel material 1. Therefore, even in the case of handwritten marking, it is possible to perform linear marking so that the direction of the line and the marking position are always the same. As a result, the marking operation can be performed easily and quickly. For example, the marking operation on a large number of fastening members 5 at the member joint portion of a steel bridge can be performed extremely efficiently.

[0022] Further, since the inner peripheral surface of the adhering portion 11 facing the nut 3 is formed in a circular shape slightly larger than the corner portion of the nut 3, the adhering portion 11 can be rotated while being adhered to the hexagonal nut 3, and the opening 13 can be arranged at an arbitrary position in the circumferential direction regardless of the fastening position in the circumferential direction of the nut 3.

[0023] Furthermore, the adhering portion 11 integrally has a first end surface portion 11a formed in a flat plate shape so as to cover one end surface of the bolt 2, a first circumferential surface portion 11b formed in a cylindrical shape so as to cover the outer peripheral surface of the bolt 2, a second end surface portion 11c formed in a flat plate shape so as to cover one end surface of the nut 3, a second circumferential surface portion 11d formed in a cylindrical shape so as to cover the outer peripheral surface of the nut 3, a third circumferential surface portion 11e formed in a cylindrical shape so as to cover the outer peripheral surface of the washer 4, and an extending portion 12 that extends in a circular flat plate shape outward from the second circumferential surface portion 11d so as to cover the surface of the steel material 1. The opening 13 is formed across the first end surface portion 11a, the first circumferential surface portion 11b, the second end surface portion 11c, the second circumferential surface portion 11d, the third circumferential surface portion 11e, and the extending portion 12. Therefore, the first and second edges 13a, 13b of the opening 13 can be formed along the surface of the fastening member 5, and the tip of the pen P can be reliably guided from one end to the other end of the first and second edges 13a, 13b.

[0024] Further, the opening 13 is formed to have a first edge 13a that linearly extends in the radial and axial directions of the adherend portion 11 from the center of the first end face portion 11a to the extending portion 12, and a second edge 13b that linearly extends in the radial and axial directions of the adherend portion 11 from the center of the first end face portion 11a to the extending portion 12 so as to form a predetermined angle θ with the first edge 13a in the circumferential direction of the adherend portion 11. Therefore, depending on the dominant hand of the operator, the direction of marking, etc., it is possible to select the more convenient one of the first and second edges 13a and 13b, and the marking operation can be performed more easily.

[0025] In this case, if the angle θ formed between the first edge 13a and the second edge 13b is greater than 150°, the opening 13 becomes too large and the adhesion state of the adherend portion 11 becomes unstable. If it is less than 30°, the angle θ formed between the first edge 13a and the second edge 13b becomes too small and it becomes impossible to secure a sufficient gap for the tip of the pen P to reach between the other end side of the first edge 13a and the other end side of the second edge 13b. Therefore, the angle θ is preferably 30° or more and 150° or less.

[0026] Also, the opening 13 has a third edge 13c that extends parallel to the first edge 13a or the second edge 13b in the extending portion 12 with a gap W slightly larger than the width of the tip of the pen P. Therefore, by inserting the tip of the pen P between one end of the first edge 13a and the third edge 13c and moving the tip of the pen P toward the other end side of the first edge 13a while bringing the tip of the pen P into contact with the first edge 13a, the tip of the pen P can be made to travel straight without deviating to the opposite side of the first edge 13a, and a linear marking can always be drawn with the pen P.

[0027] Furthermore, since the extending portion 12 is formed in a flange shape so as to be continuous in the circumferential direction of the adherend portion 11, the adherend portion 11 is not circumferentially divided by the opening 13, and the extending portion 12 can sufficiently secure the strength for preventing deformation of the adherend portion 11.

[0028] In this case, since the opening 13 has a fourth edge 13d that extends in an arc shape from one end of the third edge 13c in the extending portion 12 along the outer peripheral surface of the nut 3, the fourth edge 13d can surely perform radial positioning.

[0029] Also, when the distance between the inner surface of the adhering portion 11 and the surface of the fastening member 5 (the surface when not painted) is greater than 5 mm, the gap with the fastening member 5 is too large and becomes unstable during the marking operation. When the distance is less than 1 mm, the gap with the fastening member 5 is too small and there may be a case where the thickness of the coating film of the fastening member 5 cannot be absorbed. Therefore, the said distance is preferably 1 mm or more and 5 mm or less.

[0030] Furthermore, since the adhering portion 11 and the extending portion 12 are formed of synthetic resin, damage to the painted surface of the fastening member 5 can be prevented.

[0031] FIG. 9 shows another embodiment of the present invention, and the same reference numerals are given to the constituent parts equivalent to those in the said embodiment.

[0032] The marking aid 20 of the present embodiment includes a plurality of adhering portions 11 having the same configuration as that of the said embodiment, and extending portions 14 extending flat from each adhering portion 11. The adhering portions 11 and the extending portions 14 are provided with openings 13 equivalent to those in the said embodiment.

[0033] Thereby, according to the marking aid 20 of the present embodiment, the same effects as those of the said embodiment can be obtained. Also, since it is formed so as to be attachable to a plurality of fastening members 5 adjacent to each other, the marking operation for a plurality of fastening members 5 can be performed in a single attachment operation, which is extremely advantageous when marking a large number of fastening members 5. At that time, since the openings 13 of each adhering portion 11 are provided at the same circumferential position with respect to each other, there is also an advantage that the marking on each fastening member 5 can always be in the same direction.

[0034] Further, in each of the above embodiments, the marking is applied to the fastening member 5 composed of the male screw portion of the bolt 2, the nut 3, and the washer 4. However, it may be formed to be applied to a fastening member composed of the head of the bolt and the washer, or it may be applied to a fastening member without using a washer.

[0035] Also, each of the above embodiments is an example of the present invention, and the present invention is not limited to those described in these embodiments.

Explanation of Reference Numerals

[0036] 1... steel material, 2... bolt, 3... nut, 4... washer, 10... marking aid, 11... adherend portion, 11a... first end face portion, 11b... first peripheral face portion, 11c... second end face portion, 11d... second peripheral face portion, 11e... third peripheral face portion, 12... extension portion, 13... opening portion, 13a... first edge portion, 13b... second edge portion, 13c... third edge portion, 13d... fourth edge portion, 20... marking aid, 14... extension portion.

Claims

1. A marking aid for a fastening member for linearly marking with a pen on the surface of a fastening member fastened to an object to be fastened, extending across the fastening member and the object to be fastened, comprising: an adherend portion formed to be attachable to the fastening member; an extension portion extending flat from the adherend portion along the surface of the object to be fastened; an opening is provided in the adherend portion to expose a part of the fastening member to the outside; the opening is formed so as to be markable with a pen across the fastening member and the object to be fastened while guiding the tip of the pen along the edge thereof. A marking aid for a fastening member, characterized in that.

2. The adherend portion is characterized in that the inner peripheral surface facing the fastening member is formed in a circular shape. The marking aid for a fastening member according to claim 1, characterized in that.

3. The adherend portion has an end face portion formed in a flat shape so as to cover the axial end face of the fastening member, and a peripheral face portion formed in a cylindrical shape so as to cover the outer peripheral surface of the fastening member, the opening is formed across the end face portion, the peripheral face portion, and the extension portion. The marking aid for a fastening member according to claim 1, characterized in that.

4. The opening has a first edge linearly extending in the radial direction and the axial direction of the adherend portion from the center of the end face portion to the extension portion, and a second edge linearly extending in the radial direction and the axial direction of the adherend portion from the center of the end face portion to the extension portion so as to form a predetermined angle with the first edge in the circumferential direction of the adherend portion. The marking aid for a fastening member according to claim 3, characterized in that.

5. The opening is formed such that the angle formed by the first edge and the second edge is 30° or more and 150° or less. The marking aid for a fastening member according to claim 4, characterized in that.

6. The opening has a third edge extending in parallel at a distance slightly larger than the width of the tip of the pen with respect to the first edge or the second edge in the extension portion. The marking aid for a fastening member according to claim 4, characterized in that.

7. The extension portion is formed to be continuous in the circumferential direction of the adherend portion, the opening has a fourth edge extending in an arc shape along the outer peripheral surface of the fastening member from one end of the third edge in the extension portion. The marking aid for a fastening member according to claim 6, characterized in that.

8. The adherend portion is formed such that the distance between the inner surface of the adherend portion and the outer surface of the fastening member is 1 mm or more and 5 mm or less. The marking aid for a fastening member according to claim 1, characterized in that.

9. A plurality of the adherend portions are provided. Each adherend portion is formed so as to be attachable to a plurality of fastening members adjacent to each other The marking aid for fastening members according to claim 1, characterized in that it is as described above.

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