Marking tools for bolts, nuts, washers and components

Abstract

To provide a marking utensil for a bolt, a nut, a washer and a member that has an air-tight mechanism in which a seal surface is not dried and solidified even when quick-drying ink is used as a marking member.MEANS FOR SOLVING THE PROBLEM: A marking utensil for a bolt, a nut, a washer and a member includes: an outer cylindrical body with an opening part at a lower end; an inner cylindrical body which can move relative to the outer cylindrical body and covers a bolt, a nut and a washer; and a marking member which moves down accompanying movement of the outer cylindrical body, and applies marking to the bolt, the nut, the washer and the member. In the marking utensil for a bolt, a nut, a washer and a member, a cap which is air-tightly engaged with an engaged part of the opening part peripheral edge, a first guide part for guiding relative movement of the outer cylindrical body and the inner cylindrical body in a space partitioned by the cap and the outer cylindrical body, and the marking member are arranged, and further, the outer cylindrical body does not include an air communication hole above the engaged part.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a marking tool for bolts, nuts, washers and components that is used to mark bolts, nuts, washers and components after the initial tightening of the bolts when joining steel materials with bolts, nuts and washers in steel frame construction. [Background technology]

[0002] In steel frame construction, when joining steel materials with bolts, nuts, and washers, to check whether the tightening was done properly, a series of linear marks are first made on the bolts, nuts, washers, and components during the primary tightening to confirm that the primary tightening process has been completed. After the final tightening process, the presence or absence of co-rotation or axial rotation of the bolts and nuts is determined based on the positional deviation angle of the linear marks made on the bolts, nuts, washers, and components during the primary tightening.

[0003] Marking during the primary tightening is an important part of the bolt tightening process. While this marking can be done manually by workers using a marking pen, there are problems with this method, such as difficulty in marking accurately in dangerous locations such as high places or in locations where workers must work in an awkward position, and it also makes it difficult to ensure the safety of the workers.

[0004] In addition, as marking devices that perform one-touch marking, there are known devices that perform marking by moving a first tube (inner tube) to which a mark forming section consisting of a linearly formed stamping surface is fixed relative to a second tube (outer tube) to move the mark forming section diagonally downward (see, for example, Patent Document 1), and marking devices that perform marking on bolts, etc. by pressing an operating section (outer tube) against a main body case section (inner tube) to move a movable marker section diagonally downward (see, for example, Patent Document 2).

[0005] When marking a non-absorbent surface such as a bolt, it is preferable to use a quick-drying ink, and in this case, an airtight mechanism is required to prevent the printed surface of the marking member from drying out and hardening. The marking tool described in Patent Document 1 has a second tube (outer tube) that is composed of a semi-cylinder, and also has a moving part formed on the surface of the tube that consists of a hole and a connecting part.Therefore, even if a cap is attached to the second tube, the ink solvent evaporates from the gap in the semi-cylinder and the hole, and it is not possible to prevent the printing surface from drying and solidifying. Furthermore, the marking device described in Patent Document 2 has a link opening formed in the operating section (outer cylinder) into which a link arm is inserted to link the operating section with the movable marker section, and a pivot hole is drilled as a pivot section that pivots the other end of the link arm. Furthermore, because these link openings and pivot holes need to be provided above the operating section for the operation of the movable marker section, a cap that covers almost the entire operating section is required to ensure airtightness, which leads to reduced operability and an increase in product size, making it unrealistic. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Patent No. 5194097 [Patent Document 2] Japanese Patent Application Laid-Open No. 2002-355777 Summary of the Invention [Problem to be solved by the invention]

[0007] The present invention has been made to solve the above problems, and provides a marking tool for bolts, nuts, washers, and other components that has an airtight mechanism that prevents the stamping surface from drying out and hardening even when quick-drying ink is used as the marking material. [Means for solving the problem]

[0008] The first invention completed to solve the above problems is a marking tool for bolts, nuts, washers and components comprising an outer cylindrical body with an opening at the bottom end, an inner cylindrical body that is movable relative to the outer cylindrical body and covers the bolts, nuts and washers, and a marking member that moves downward as the outer cylindrical body moves and applies markings to the bolts, nuts, washers and components, wherein the marking tool for bolts, nuts, washers and components further comprises a cap that fits airtightly to a mating portion around the opening, a first guide portion that guides the relative movement of the outer cylindrical body and the inner cylindrical body within the space partitioned by the cap and the outer cylindrical body, and the marking member, and further characterized in that the outer cylindrical body does not have any air communication holes above the mating portion.

[0009] The second invention, which was completed to solve the above problem, is a marking tool for bolts, nuts, washers and components according to the first invention, characterized in that the first guide portion is composed of a first guide surface provided on either the outer cylindrical body or the inner cylindrical body, and a first abutment portion that is able to slide while abutting against the first guide surface provided on the other.

[0010] The third invention, which was completed to solve the above problems, is a marking tool for bolts, nuts, washers and components described in the second invention, characterized in that the first guide surface has a first inclined portion that is inclined obliquely from the axial direction of the outer cylindrical body, and the marking member is fixed to the inner surface of the outer cylindrical body.

[0011] The fourth invention, which was completed to solve the above problems, is a marking tool for bolts, nuts, washers and components according to the third invention, characterized in that it further has a second guide portion, located within the space partitioned by the cap and the outer cylinder, at a position away from the first guide portion, the second guide portion comprising a second inclined portion having the same inclination angle as the first inclined portion and a second abutment portion that is able to slide while abutting against the second inclined portion.

[0012] The fifth invention, which was completed to solve the above problems, is a marking tool for bolts, nuts, washers, and parts, as described in the first to fourth inventions, characterized in that it has an elastic member inside the outer cylindrical body that constantly urges the inner cylindrical body in the protruding direction. [Effects of the Invention]

[0013] In a first invention, a marking tool for bolts, nuts, washers and components has an outer cylindrical body with an opening at its lower end, an inner cylindrical body that is movable relative to the outer cylindrical body and covers the bolts, nuts and washers, and a marking member that moves downward as the outer cylindrical body moves and applies markings to the bolts, nuts, washers and components, and further has a cap that fits airtightly to a mating portion around the opening, a first guide portion that guides the relative movement of the outer cylindrical body and the inner cylindrical body in the space partitioned by the cap and the outer cylindrical body, and the marking member, and further the outer cylindrical body does not have any air communication holes above the mating portion, so that it is possible to reliably prevent the solvent from volatilizing from the printing surface of the marking member and the printing surface will not dry out and harden even with long-term use, allowing for clear markings to be applied.

[0014] In the second invention, the first guide portion is composed of a first guide surface provided on either the outer cylindrical body or the inner cylindrical body, and a first abutment portion that can slide while abutting against the first guide surface provided on the other, so that the relative movement of the outer cylindrical body with respect to the inner cylindrical body can be appropriately guided, and marking can be made at the exact position of a bolt, etc.

[0015] In the third invention, the first guide surface has a first inclined portion that is inclined obliquely relative to the axial direction of the outer barrel, and the marking member is fixed to the inner surface of the outer barrel. Therefore, by lowering the outer barrel, the outer barrel and the marking member move together obliquely downward, completing marking on a bolt or the like. This simplifies the configuration because there is no need to provide a separate marking member operating mechanism independent of the outer barrel. Furthermore, the oblique downward movement of the marking member can prevent wear on the contact surfaces of the marking member due to rubbing against each other in the planar direction.

[0016] In the fourth aspect of the present invention, the space defined by the cap and the outer cylinder further includes a second guide portion, positioned away from the first guide portion, the second guide portion including a second inclined portion having the same inclination angle as the first inclined portion and a second contact portion that is slidable while contacting the second inclined portion. This allows the outer cylinder to move diagonally downward relative to the inner cylinder smoothly, improving marking speed. Furthermore, the load on the guide portion can be reduced, leading to an improvement in product life.

[0017] In the fifth invention, the outer cylinder has an elastic member that constantly biases the inner cylinder in the protruding direction, so that the outer cylinder automatically returns to its original state by the elastic member as soon as marking is completed, leading to improved marking speed and work efficiency. [Brief explanation of the drawings]

[0018] [Figure 1] 1 is a perspective view of a marking tool for bolts, nuts, washers, and components according to an embodiment of the present invention. FIG. [Figure 2] 1 is a cross-sectional view of a marking tool for bolts, nuts, washers, and components according to an embodiment of the present invention. [Figure 3] FIG. [Figure 4] FIG. [Figure 5] FIG. [Figure 6] FIG. [Figure 7] FIG. 1 is a diagram (without bolts, etc.) for explaining the marking operation of a marking tool for bolts, nuts, washers, and components according to an embodiment of the present invention. [Figure 8] FIG. 1 is a diagram (including bolts, etc.) for explaining the marking operation of a marking tool for bolts, nuts, washers, and components according to an embodiment of the present invention. [Figure 9] This is a perspective view showing the state in which markings have been made on the bolts, nuts, washers, and components that have been primarily tightened. DETAILED DESCRIPTION OF THE INVENTION

[0019] A marking tool for bolts, nuts, washers and other components according to an embodiment of the present invention will be described below with reference to Figures 1 to 8. In the present invention, the terms "lower end" and "belower" refer to the side that presses the outer cylindrical body against the inner cylindrical body, and the terms "upper end" and "above" refer to the opposite side.

[0020] The marking tool 1 of the embodiment is a marking tool used to apply a linear mark M to the surface of fastening members such as bolts 10, nuts 11, and washers 12, and plate-like members 13 such as steel plates fastened by these fastening members.

[0021] 9 shows a state in which a member 13 is directly connected by fastening with a bolt 10, a nut 11, and a washer 12. The tip of the bolt 10 protrudes upward from the surface (top surface) of the member 13. The bolt 10 is inserted into a through-hole (not shown) drilled in the member 13 from the back side (bottom surface) of the member and is fastened with the nut 11 on the surface side of the member. When fastening the bolt 10 with the nut 11, the washer 12 is first inserted into the tip of the bolt 10, and then the nut 11 is fastened from above. In this embodiment, a high-strength bolt is used as the bolt 10, a hexagonal nut is used as the nut 11, and a flat washer is used as the washer 12, but the present invention is not limited to these.

[0022] As shown in Figures 1 to 8, the marking tool 1 of this embodiment is composed of an inner cylindrical body 3 that houses the bolt 10, nut 11, and washer 12 that are fastened to the member as described above, a marking member 4 that applies a mark M to the fastening member and member 13, and an outer cylindrical body 2 that works integrally with the marking member 4 and functions as a handle when marking.

[0023] As shown in Figures 1 to 4, the outer cylinder 2 is a hollow, capped cylinder with an opening 2a at its lower end, which also functions as a handle for marking. The lower portion of the outer cylinder 2 has an expanded-diameter section 2c, which is slightly larger in diameter than the handle section 2b. This expanded-diameter section 2c is designed to cover the fastening member housing section 3b of the inner cylinder 3 (described later). The outer surface of the expanded-diameter section 2c is provided with a convex section 2f, which serves as a guide for identifying the position of the marking member 4 during marking. As shown in Figures 3 and 4, a rail section 2g is formed along the longitudinal axis of the inner surface of the expanded-diameter section 2c. The marking member 4 (described later) is inserted and fixed into the rail section 2g. The outer surface of the opening 2a of the outer cylinder 2 has a mating section 2h around the periphery for airtight mating with the cap 5. There are no air communication holes above the mating section 2h.

[0024] As shown in FIG. 2, the inner cylinder 3 is connected to the outer cylinder 2 via a connecting portion 6 and is relatively movable via a coil spring 7, which is an elastic member. As shown in FIGS. 5 and 6, the inner cylinder 3, like the outer cylinder 2, is a hollow cylinder having an open portion 3a at its lower end and a housing portion 3b at its lower portion, the inner diameter of which is expanded to accommodate a fastening member. The housing portion 3b has two regions with gradually varying inner diameters that are approximately the same as the diameters of the circumscribing circle of the nut 11 and the washer 12. The inner wall of the housing portion 3b comes into contact with the nut 11 and washer 12 during marking, thereby aligning the marking tool 1 to prevent it from wobbling. To further enhance the wobbling prevention effect, the inner surface of the housing portion 3b may be hexagonal to match the shape of the nut 11. As shown in Figures 2, 5 and 6, when the inner cylinder 3 is stored inside the outer cylinder 2, it has a slit 3c extending in the axial direction on its outer surface at a position opposite the marking member 4, and when the outer cylinder 2 is pressed down, the marking member 4 moves into the slit 3c, completing the marking.

[0025] In this embodiment, since marking is performed by moving the outer cylinder 2 diagonally downward relative to the inner cylinder 3, there must be a difference in the inner diameters of both cylinders to the extent that the outer cylinder 2 can move radially relative to the inner cylinder 3. This difference in inner diameters may cause the inner cylinder 3 to swing within the outer cylinder 2, resulting in rattle during marking, so rattle is suppressed by the connecting portion 6, which will be described later.

[0026] 2, the marking member 4 is composed of a marking body 4a for forming a mark M on the fastening member and member 13, and a base 4b for supporting the marking body 4a and fixing it to the inner surface of the outer cylindrical body 2. The marking body 4a is made of porous rubber with open cells impregnated with volatile ink, and is molded in a linear shape that fits the side shape of the fastening member. The base 4b is an elongated member with a T-shaped cross section (not shown) for supporting the marking body 4a. The T-shaped top surface of the base functions as a support part that adhesively supports the marking body, and a pair of protrusions on the side functions as a fixing part that fixes the marking member 4 to the outer cylinder body 2 by being inserted into the rail part 2g.

[0027] The volatile solvent used in the volatile ink may be, for example, a volatile organic solvent such as a volatile ester solvent, a volatile ketone solvent, a volatile aromatic solvent, or a volatile alcohol solvent, either alone or in combination. Examples of the volatile ester solvent include methyl acetate, ethyl acetate, n-propyl acetate, isopropyl acetate, n-butyl acetate, isobutyl acetate, n-amyl acetate, isoamyl acetate, methyl propionate, ethyl propionate, n-propyl propionate, isopropyl propionate, n-butyl propionate, isobutyl propionate, n-amyl propionate, isoamyl propionate, methyl butyrate, ethyl butyrate, n-propyl butyrate, isopropyl butyrate, n-butyl butyrate, isobutyl butyrate, n-amyl butyrate, isoamyl butyrate, methyl lactate, ethyl lactate, n-propyl lactate, isopropyl lactate, n-butyl lactate, isobutyl lactate, n-amyl lactate, and isoamyl lactate. Examples of volatile ketone solvents that can be used include acetone, methyl ethyl ketone, methyl n-propyl ketone, methyl isopropyl ketone, methyl n-butyl ketone, methyl isobutyl ketone, methyl n-amyl ketone, methyl isoamyl ketone, and 4-methoxy-4-methylpentanone-2. Examples of volatile aromatic solvents that can be used include benzene, toluene, and xylene. Examples of volatile alcohol solvents that can be used include n-butanol, n-pentanol, n-hexanol, ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, ethylene glycol monopropyl ether, ethylene glycol monobutyl ether, 3-methyl-3-methoxybutanol, 3-methoxy-1-butanol, propylene glycol monomethyl ether, propylene glycol monoethyl ether, propylene glycol monopropyl ether, propylene glycol monobutyl ether, and dipropylene glycol monomethyl ether. In particular, propylene glycol monomethyl ether (boiling point: 120°C), dipropylene glycol monomethyl ether (boiling point: 188°C), 3-methoxy-1-butanol (boiling point: 161°C), benzyl alcohol (boiling point: 205°C), etc. are preferred from the viewpoint of drying properties. The colorant used in the volatile ink may be any oil-soluble dye, and examples thereof include nigrosine, azine, monoazo, disazo, metal complex monoazo, anthraquinone, phthalocyanine, and triarylmethane oil-soluble dyes, oil-soluble salt-forming dyes, and oil-soluble metal-containing dyes. Examples of pigments that can be used include organic pigments such as condensed azo, isoindolinone, quinacridone, diketopyrrolopyrrole, anthraquinone, dioxazine, phthalocyanine, and thioindigo, inorganic pigments such as carbon black, titanium oxide, and iron oxide, glitter pigments in which mica or glass is coated with titanium oxide or iron oxide, and metal pigments such as aluminum powder and brass powder. Existing ultraviolet-curable inks can also be used.

[0028] The guide portion is intended to move the outer cylinder 2 and the marking member 4 diagonally downward relative to the inner cylinder 3, and in this embodiment, two guide portions (a first guide portion and a second guide portion) are provided at positions spaced apart from each other to stabilize the marking operation. As shown in Figures 2 to 6, the first guide portion is composed of a pair of guide holes 3d (first inclined portions) as first guide surfaces inclined obliquely from the axial direction, provided on the side surface of the accommodating portion 3b of the inner cylindrical body 3, and a pair of circular protrusions 2d (first abutment portions) that are inserted into the guide holes 3d, are able to slide while abutting against the guide holes 3d, and protrude inward from the inner surface of the expanded diameter portion 2c of the outer cylindrical body 2. 2 to 6, the second guide portion is composed of an inclined portion 3e (second inclined portion) formed on the top surface of the inner cylindrical body 3 at the same inclination angle as the guide hole 3d, and an abutment portion 2e (second abutment portion) that protrudes vertically downward from the top surface of the outer cylindrical body 2, has the same inclination angle as the inclined portion 3e, and is capable of sliding while abutting against the inclined portion 3e. The abutment portion 2e is formed in a cylindrical shape with a cavity inside, and can be press-fitted by inserting a part of the connecting portion 6, which will be described later, into the cavity.

[0029] As shown in FIG. 2, the connecting portion 6 connects the outer cylindrical body 2 and the inner cylindrical body 3 and stabilizes the marking operation of the outer cylindrical body 2 relative to the inner cylindrical body 3 by suppressing rattle between the two cylindrical bodies. As shown in FIG. 2, the connecting portion 6 has a small cylindrical portion 6a with a relatively small diameter integrally molded on the top surface of a large cylindrical portion 6b with a relatively large diameter and a tapered surface 6c on its top surface with the same inclination angle as the guide hole 3d. Meanwhile, an insertion hole 3f is formed in the top surface of the inner cylindrical body 3, the insertion hole 3f being larger than the outer diameter of the small cylindrical portion 6a but smaller than the outer diameter of the large cylindrical portion 6b. When the large cylindrical portion 6b is housed inside the inner cylindrical body 3 with the small cylindrical portion 6a protruding from the insertion hole 3f, the inclined portion 3e on the top surface of the inner cylindrical body 3 comes into surface contact with the tapered surface 6c of the large cylindrical portion 6b, preventing the connecting portion 6 from coming off the top surface of the inner cylindrical body 3. On the other hand, the small cylindrical portion 6a protruding from the insertion hole 3f is inserted into the cavity of the abutting portion 2e of the outer cylindrical body 2, and the connecting portion 6 connects the inner cylindrical body 3 and the outer cylindrical body 2 to each other by press-fitting.

[0030] As shown in Figure 2, the cap 5 is a bottomed cylinder with an open top that is press-fitted into the mating portion 2h of the outer cylinder 2. The first guide portion, second guide portion, marking member 4, and connecting portion 6 are located within the space defined by the outer cylinder 2 and cap 5. Furthermore, the outer cylinder 2 does not have any air vents above the mating portion 2h. This reliably prevents solvent evaporation from the marking body 4a of the marking member 4, preventing the marking body 4a from drying out and solidifying, even with long-term use. The method of mating the cap 5 and mating portion 2h is not limited to press-fitting; various mating methods that ensure airtightness, such as threaded mating and concave-convex mating, can also be used.

[0031] Next, the operation and effect of the marking tool for bolts, nuts, washers and components according to the above-described embodiment will be described with reference to FIGS. As shown in Figure 7(a), before marking, when the outer cylindrical body 2 is not pressed, the outer cylindrical body 2 and the inner cylindrical body 3 are in the most extended state by the coil spring 7. In this state, the marking tool 1 is placed from above so as to accommodate the fastening member in the accommodation section 3b of the inner cylindrical body 3 (Figure 8(a)). At this time, the inner wall of the accommodation section 3b is in contact with the nut 11 and washer 12, which function as an alignment to prevent the marking tool 1 from wobbling. In Figure 8(a), the circumscribing circle of the hexagonal nut is in contact with the inner wall of the accommodation section.

[0032] As shown in FIG. 8(b), the marking tool 1 performs marking by contacting the lower end of the inner cylindrical body 3 with the member 13. As shown in FIGS. 7(b) and 8(b), when the outer cylindrical body 2 is gripped and pressed down against the repulsive force of the coil spring 7, the first guide portion and the second guide portion act to move the outer cylindrical body 2 diagonally downward relative to the inner cylindrical body 3. That is, this action is achieved by the protrusion 2d and the abutment portion 2e of the outer cylindrical body 2 sliding against the guide hole 3d and the slope of the inclined portion 3e of the inner cylindrical body 3, respectively. By providing two guide portions at separate locations, the diagonally downward movement of the outer cylindrical body 2 relative to the inner cylindrical body 3 becomes smoother, improving the marking speed and reducing the load on each component of the guide portions, leading to an improved product life.

[0033] Meanwhile, because the marking member 4 is fixed to the outer cylinder 2, it moves diagonally downward in conjunction with the outer cylinder 2, passing through the slit 3c of the inner cylinder 3 and applying the mark M to the fastening member and member 13 (Fig. 8(b)). At this time, because the outer cylinder 2 and the inner cylinder 3 are connected by the connecting portion 6, marking can be done smoothly without any rattle.

[0034] By fixing the marking member 4 inside the outer cylinder 2, it is possible to simplify the configuration, as there is no need to provide a separate operating mechanism for the marking member 4 that is independent of the outer cylinder 2. Furthermore, by moving the marking member 4 diagonally downward using the guide portion, it is possible to prevent the contact surfaces of the marking body 4a from rubbing against each other in the planar direction during marking, thereby preventing wear on the contact surfaces.

[0035] After marking is completed, when the pressure on the outer cylinder 2 is released, the outer cylinder 2 and marking member 4 return to their initial positions due to the repulsive force of the compressed coil spring 7 and the action of the first guide portion and second guide portion. After use, the cap 5 is press-fitted onto the mating portion 2h of the outer cylinder 2. Because there are no air communication holes above the mating portion 2h of the outer cylinder 2, it is possible to reliably prevent the solvent from volatilizing from the marking body 4a, and the marking body 4a will not dry out and harden even after long-term use, allowing for the application of a clear mark M.

[0036] In this embodiment, the guide hole 3d and the inclined portion 3e are formed as inclined surfaces to allow the outer cylinder 2 to slide obliquely downward relative to the inner cylinder 3, but they may also be formed vertically without being inclined. In this case, the first guide portion and the second guide portion function as guides to move the marking body vertically downward without causing the outer cylinder 2 to swing left and right relative to the inner cylinder 3.

[0037] While the preferred embodiment of the bolt, nut, washer, and component marking tool according to the present invention has been described above, the technical concept of the present invention should not be construed as being limited to the embodiment described herein. Those skilled in the art can make appropriate modifications or improvements to this embodiment without departing from the spirit or technical concept of the present invention. The bolt, nut, washer, and component marking tool and related peripheral technologies incorporating such modifications and improvements should be understood to be encompassed within the technical scope of the present invention. [Explanation of symbols]

[0038] 1. Marking equipment 2. Outer cylinder 2a opening 2b Handle 2c Expanded diameter part 2d protrusion 2e Contact part 2f convex part 2g Rail section 2h Engaged part 3 Inner cylinder 3a Open area 3b Housing section 3c slit 3d guide hole 3e Slope 3f Insertion hole 4 Marking material 4a Marking body 4b base 5 Caps 6 Connecting part 6a Small tube part 6b Large cylinder part 6c Tapered surface 7 Coil spring 10 volts 11 Nut 12 Washers 13 Materials

Claims

1. an outer cylinder having an opening at its lower end; an inner cylindrical body that is movable relative to the outer cylindrical body and that covers the bolt, nut, and washer; a marking member that moves downward with the movement of the outer cylindrical body and applies a mark to the bolt, nut, washer, or component, a cap that is airtightly fitted to the fitting portion around the opening; A marking tool for bolts, nuts, washers and components, characterized in that a first guide portion that guides the relative movement of the outer cylinder body and the inner cylinder body, and the marking member are arranged within the space partitioned by the cap and the outer cylinder body, and further, the outer cylinder body does not have an air communication hole above the mating portion.

2. The marking tool for bolts, nuts, washers and components according to claim 1, characterized in that the first guide portion is composed of a first guide surface provided on either the outer cylindrical body or the inner cylindrical body, and a first abutment portion provided on the other of the outer cylindrical body that is slidable while abutting against the first guide surface.

3. A marking tool for bolts, nuts, washers and components as described in claim 2, characterized in that the first guide surface has a first inclined portion that is inclined obliquely from the axial direction of the outer cylindrical body, and the marking member is fixed to the inner surface of the outer cylindrical body.

4. The marking tool for bolts, nuts, washers and components as described in claim 3, characterized in that it further has, in a space partitioned by the cap and the outer cylinder body, a second guide portion located at a position away from the first guide portion, the second guide portion being composed of a second inclined portion having the same inclination angle as the first inclined portion and a second abutment portion that can slide while abutting against the second inclined portion.

5. 5. The marking tool for bolts, nuts, washers and components according to claim 1, further comprising an elastic member disposed within the outer cylindrical body for constantly biasing the inner cylindrical body in a protruding direction.

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