Marking Device

Abstract

To provide a marking device capable of applying continuous clear marking even to a corner part.SOLUTION: A marking device having a fastened member and a fastening member fastened to the fastened member as marking objects includes: a housing covered on the fastening member; and a marking member connected to the housing via a support shaft 30, and capable of oscillating toward the fastening member with the support shaft 30 as the center of oscillation. When a vector having as a starting point, a marked corner part MC1 as a part to which a mark is applied in a boundary between the marking objects, and having the center of oscillation as a terminal point is a first vector V1, and a vector having the marked corner part MC1 as a starting point, orthogonal to a central axis C of the fastening member, and directing away from the fastening member is a second vector V2, an angle made by the first vector V1 and the second vector V2 is 90 degrees or more and less than 180 degrees.SELECTED DRAWING: Figure 8

Description

[Technical Field]

[0001] The present invention relates to a marking device used to apply marks to fastening members and fastened members, such as steel materials, after the initial tightening when joining the fastening members using fastening members such as bolts, nuts, and washers. [Background technology]

[0002] In steel frame construction, when fastened members such as steel materials are joined with fastening members such as bolts, nuts, and washers, these fastening members are tightened in the following order: primary tightening, marking, and final tightening. Specifically, the nut is first rotated to a specified torque value to perform primary tightening, and a series of linear marks are made on the fastening member and fastened member (hereinafter collectively referred to as "marking object") that have been subjected to primary tightening. Final tightening is then performed, and by inspecting the positional deviation angle of the linear marks made on the marking object after primary tightening, it is possible to determine whether the bolt and nut are rotating together.

[0003] Marking is generally done manually using a pen or similar tool, but the task of handwriting each and every object is a significant burden. Furthermore, in dangerous locations such as high places or locations where workers are forced to assume awkward positions, it is difficult to accurately mark objects by hand and ensure worker safety. Therefore, a marking device capable of marking bolts and other objects has been proposed.

[0004] Patent Document 1 describes, as "Example 4," a marking jig including a felt body pivotally supported inside a cylindrical housing. In this marking jig, as shown in Figure 16 of the document, the tip of the felt body moves diagonally upward to contact the object to be marked, such as a screw. This causes the felt body to be insufficiently pressed against the corners between the screw and washer, or between the washer and base, resulting in chipped or thin markings at the corners. In particular, when the object to be marked is a steel plate and a bolt, nut, washer, or other component, the corners between the components are connected in a stepped pattern, so marking at the corners using a felt body from a diagonally downward direction is likely to chip. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Publication No. 2019-217662 Summary of the Invention [Problem to be solved by the invention]

[0006] SUMMARY OF THE INVENTION An object of the present invention is to provide a marking device that solves the above-mentioned problems of the conventional art and is capable of applying clear markings without interruption even at corners. [Means for solving the problem]

[0007] In order to solve the above problem, a marking device is provided which has as its marking objects a fastened member and a fastening member fastened to the fastened member, a housing which is placed over the fastening member, and a marking member which is connected to the housing via a support shaft and which can swing toward the fastening member around the support shaft as a swing center, wherein when a vector having a starting point at the corner to be marked, which is the part to be marked at the boundary between the marking objects, and an ending point at the swing center is defined as a first vector, and a vector having a starting point at the corner to be marked, which is perpendicular to the central axis of the fastening member and points in a direction away from the fastening member is defined as a second vector, the angle between the first vector and the second vector is greater than or equal to 90 degrees and less than 180 degrees.

[0008] The marking member has a protruding portion that protrudes outside the housing, and when the protruding portion is pressed in, Marking object It is preferable that a mark is attached to the

[0009] It is also preferable that the marking device be provided with a knock body attached to the housing via an elastic member and movable from the tip of the fastening member toward the base end, and a regulating section capable of regulating the operation of the marking member, wherein the regulating section regulates the rotation of the marking member when the marking device is not in use, and when the marking device is in use, the knock body is pushed in a direction approaching the fastening member, thereby releasing the regulating section's regulation of the marking member.

[0010] The marking device further includes a holder that is attached to the housing via an elastic member and is movable from the tip end of the fastening member toward the base end thereof, and the holder is provided with a pressing portion that can press the marking member. When the marking device is in use, the holder is pressed in a direction approaching the fastening member, thereby pressing the marking member. Department Pressing the marking member, Marking object It is preferable that the marking can be attached to the marking. [Effects of the Invention]

[0011] The present invention can provide a marking device that can apply clear, uninterrupted markings even at corners. [Brief explanation of the drawings]

[0012] [Figure 1] 1 is a perspective view of a marking device according to a first embodiment. [Figure 2] FIG. 2 is a cross-sectional view taken along line II-II of FIG. [Figure 3] This is a perspective view showing the state in which the marking device shown in Figure 1 is attached to a bolt, which is an object to be marked. Note that this figure shows a part of one of the two plate-shaped members that are fastened objects, which comes into contact with the washer, and the other plate-shaped member and the bolt head are not shown. [Figure 4] FIG. 4 is a cross-sectional view taken along line IV-IV of FIG. [Figure 5] FIG. 3 is an enlarged view of the marking member shown in FIG. 2. [Figure 6] 5 is a cross-sectional view showing a state in which the knock body of the marking device shown in FIG. 4 is pressed down and the restriction on the swinging of the marking member is released. FIG. [Figure 7] 7 is a cross-sectional view showing a state in which the marking member of the marking device shown in FIG. 6 is pushed in and the printing body is pressed against the marking target. FIG. [Figure 8] This is a diagram showing the angle between a first vector and a second vector, each starting from a first corner to be marked, which is the boundary between the shank of the bolt and the top surface of the nut and is also the part to be marked, in the marking device in the state shown in Figure 4. The marking device and the object to be marked are shown by dotted lines. [Figure 9] This is a diagram showing the angle between a first vector and a second vector, starting from the second corner to be marked, which is the boundary between the bottom surface of the nut and the top surface of the washer and is also the part to be marked, in the marking device in the state shown in Figure 4. The marking device and the object to be marked are shown by dotted lines. [Figure 10]This figure shows the angle between the first vector and the second vector, starting from the third corner to be marked, which is the boundary between the bottom surface of the washer and the surface of the fastened workpiece and is also the part to be marked, in the marking device in the state shown in Figure 4. The marking device and the object to be marked are shown by dotted lines. [Figure 11] FIG. 10 is a perspective view of a marking device according to a second embodiment. [Figure 12] This is a cross-sectional view taken along the line XII-XII in Figure 11, with the seal cap removed. [Figure 13] 12 is a vertical cross-sectional view showing a state in which the marking device shown in FIG. 11 is attached to a bolt that is an object to be marked. FIG. [Figure 14] 14 is a vertical cross-sectional view showing a state in which the marking member of the marking device shown in FIG. 13 is pressed down and the printing body is pressed against the marking target. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0013] The following describes an embodiment of the invention.

[0014] (First embodiment) 1 and 2, the marking device 1A of the first embodiment includes a housing 10A having a generally cylindrical shape as a whole, and a marking member 200A that is connected to the housing 10A via a support shaft 30 and can swing inward and outward from the housing 10A around the support shaft 30 as a swing center. The housing 10A of this embodiment is made of resin. The material is not limited to this and may be a material other than resin, but if it is made of resin, the marking device 1A can be made suitable for outdoor use due to its dustproof, waterproof, and durable properties, and is lightweight and unbreakable.

[0015] 3 and 4, the marking device 1A is used to mark objects that are fastening members such as bolts 5, nuts 6, and washers 7, and fastened members 8 such as steel materials that have been primarily tightened by these fastening members, with fastened members 81 positioned on the fastening member side, and to apply a continuous linear mark to the surface of the marking object. Note that in this embodiment, the fastened members 8 are two plates, plate-shaped fastened members 81 and 82, but this is not limited to this, and the fastened members 8 may be three or more members. Also, in this embodiment, the fastening members are bolts 5, nuts 6, and washers 7, but the configuration of the fastening members is not limited to this.

[0016] The housing 10A is placed over a fastening member, which is the object to be marked. As shown in FIGS. 2 and 4, the housing 10A of this embodiment has a bottom opening 12 at its lower end in the figures, which is large enough to allow the fastening member to pass through. The housing 10A is placed over the fastening member from the bottom opening 12 side. A hollow cavity 11 is formed inside the housing 10A, extending from the bottom opening 12 toward the upper side in the figures. In this embodiment, the cavity 11 is shaped to fit the outer shapes of the bolt 5, nut 6, and washer 7 that have been initially tightened, and has an inner diameter slightly larger than the outer shapes of these fastening members. Furthermore, the central axis C' of the cavity 11 in this embodiment substantially coincides with the central axis C of the bolt 5 housed therein. Such a cavity 11 facilitates positioning of the fastening member. Note that the shape of the cavity 11 is not limited thereto, and a positioning member such as a pin may be provided.

[0017] A slit-shaped notch 13 is provided in the wall surface of the hollow portion 11 at a position facing a printing surface 251 of a printing body 250, which will be described later. The notch 13 extends in the direction of the central axis C' of the hollow portion 11 and is formed to a size that allows the printing surface 251 to pass through.

[0018] The marking member 200A will now be described. In the following description, as shown in Figures 2 and 5, the direction parallel to the central axis C' of the hollow portion 11 of the embodiment is defined as the Y-axis direction, and the radial direction centered on the central axis C' of the hollow portion 11 is defined as the X-axis direction. Note that Figure 2 is a cross-sectional view taken along an XY plane passing through the center 31 of the support shaft 30, which is the swing center of the marking member 200A, and the approximate center in the thickness direction of the printing medium 250 that applies a mark to the marking target.

[0019] 2 and 5, the marking member 200A of this embodiment is an arm-like member formed generally in a V-shape. Specifically, the marking member 200A includes a first bent portion 231 bent into a mountain shape at the base end and a second bent portion 232 bent into a mountain shape at a substantially central position from the first bent portion 231 to the tip end. The marking member 200A of this example includes a bearing portion 211 at the base end into which the spindle 30 can be inserted, a base end linear portion 210 extending linearly in the X-axis direction from the bearing portion 211 to the first bent portion 231, a push-in lever portion 220A extending obliquely downward in the figures from the first bent portion 231 to the second bent portion 232, and a print element support portion 240 extending generally downward in the figures from the second bent portion 232 to the tip end.

[0020] A printing body 250 is fixed to the printing body support part 240 of this embodiment. The printing body 250 of this embodiment is a printing body made of felt that can be impregnated with marking ink, and has a printing surface 251 that is formed to fit the surface shape of the object to be marked, and is capable of adhering a substantially linear mark by contacting the object to be marked. The ink impregnated into the printing body 250 is not particularly limited as long as it is ink that can be used for marking outdoors. The printing body 250 may also be configured to include an ink occlusion body that can supply ink. The shape of the printing body 250 will be described later.

[0021] The printing body 250 of the embodiment is clamped in a printing body receiving part 241 having a recess capable of clamping the printing body 250, and is fixed to the printing body receiving part 241 by a fixing pin 242, and this printing body receiving part 241 is attached to the printing body support part 240. The method of fixing the printing body 250 is not limited to this, and other structures may be used.

[0022] The length ratio of the main parts of the marking member 200A of this embodiment is approximately 2:3:4, i.e., "from the base end portion to the first bent portion 231": "from the first bent portion 231 to the second bent portion 232": "from the second bent portion 232 to the tip end portion." The bending angle of the first bent portion 231 and the second bent portion 232 is approximately 140 degrees, but the shape of the marking member 200A is not limited to this.

[0023] 2, the marking member 200A of this embodiment is pivotally supported on the housing 10A via a support shaft 30 inserted into a bearing portion 211, and is capable of swinging inward and outward from the housing 10A around the support shaft 30 as the center of swing. The marking member 200A of this embodiment is biased radially outward from the housing 10A by a biasing member 212. The biasing member 212 of this embodiment is a torsion spring, and is attached to the support shaft 30.

[0024] The spindle 30 of this embodiment is attached to the top surface of the hollow portion 11 inside the housing 10A so as to extend in a direction perpendicular to the X-axis and Y-axis (a direction perpendicular to the paper surface of FIG. 2). The spindle 30 of this embodiment is provided on an extension of the inner wall surface of the hollow portion 11, and the spindle 30 and the printing element 250 are arranged to face each other with the hollow portion 11 in between.

[0025] 2 and 4, in the marking device 1A of this embodiment, the base-side linear portion 210 of the marking member 200A is disposed radially on the top surface side of the hollow portion 11, and the push-in lever portion 220A is located outside the hollow portion 11. In this embodiment, a lever opening 14 is formed in the housing 10A, and a portion of the push-in lever portion 220A is exposed to the outside of the housing 10A through the lever opening 14. The operator of the marking device 1 performs marking by manually pressing in the exposed portion of the push-in lever portion 220A. With this configuration, the load applied to the printing surface 251 can be freely adjusted by the operator's pressing force during marking, allowing the operator to adjust the force to obtain an appropriate load depending on the amount of ink remaining.

[0026] The push lever 220A of the embodiment includes a curved portion 221 and a protrusion 222 on the surface on the upper side in the figure, which is the operated portion. The curved portion 221 has a gently curved surface, and is the portion on which the operator's fingers rest when the operator presses the marking member 200A toward the inside of the housing 10A. The protrusion 222 is formed on the surface of the curved portion 221 and can prevent the operator's hand from slipping. In the embodiment, three protrusions 222 are provided, but the shape and number of the protrusions are not limited to this.

[0027] 3, the lever opening 14 in this embodiment is formed to a size that allows the push-in lever portion 220A and a part of the printing element support portion 240 to be exposed to the outside of the housing 10A, and the opening width is narrowed at the tip side of the printing element support portion 240. This prevents the tip side of the marking member 200A from slipping out.

[0028] Next, the printing element 250 will be described. As shown in Figures 4 and 5, the printing element 250 of this embodiment is a plate-like member having a thickness corresponding to the width of the linear mark to be applied to the marking object, and is fitted into a recess formed in the printing element receiving portion 241, and is clamped with the printing surface 251 that contacts the marking object exposed. The printing element 250 clamped by the printing element receiving portion 241 is positioned facing the notch 13 of the hollow portion 11, and is displaced in a direction approaching the marking object by the swinging action of the marking member 200A, allowing the printing surface 251 to come into contact with the marking object.

[0029] The printing surface 251 is formed in a shape that follows the uneven shape of the surface of the marking object, and can come into close contact with both the surface extending in the X-axis direction and the surface extending in the Y-axis direction of the marking object. Furthermore, the printing surface 251 of this embodiment has a convex corner that can come into close contact with the corner to be marked, which is the part where the mark is applied at the boundary between the marking objects.

[0030] 4 and 5, the print body 250 of this embodiment has a stepped shape in which the width in the X direction decreases stepwise on the print surface 251 side in a vertical cross section. This results in multiple convex corners being formed on the print surface 251 side of the print body 250. In this embodiment, a total of three convex corners are provided, namely, a first convex corner 252, a second convex corner 253, and a third convex corner 254, in that order from the top in the figure.

[0031] Incidentally, the object to be marked in this embodiment has a total of three marked corners: a first marked corner MC1 at the boundary between the bolt 5 and the nut 6, a second marked corner MC2 at the boundary between the nut 6 and the washer 7, and a third marked corner MC3 at the boundary between the washer 7 and the fastened member 81. In the marking device 1A of this embodiment, the marking operation described below allows the first convex corner 252 to come into close contact with the first marked corner MC1, the second convex corner 253 to come into close contact with the second marked corner MC2, and the third convex corner 253 to come into close contact with the third marked corner MC3.

[0032] Next, a locking mechanism that restricts the swinging of the marking member 200A in the marking device 1A will be described. Providing a locking mechanism in the marking device 1A is preferable because it can restrict unintended movement of the marking member 200A and prevent ink stains from adhering.

[0033] As shown in FIGS. 3 and 4, the marking device 1A of this embodiment has a lid-shaped knock body 40 provided on the upper side of the housing 10A in the figure. The knock body 40 of this embodiment is attached to the housing 10A via an elastic member 41 and is movable from the tip to the base end of the fastening member, which is the object to be marked. The elastic member 41 of this embodiment is a compression coil spring, but is not limited to this configuration. The knock body 40 also has a restricting portion 42 that can restrict the swing of the marking member 200A. In this embodiment, an engagement piece 213 that is substantially perpendicular to the base-side linear portion 210 is formed on the base-side end of the marking member 200A, and the restricting portion 42 and the engagement piece 213 are engageable with each other.

[0034] In this embodiment, when the marking device 200A is not in use, as shown in FIG. 4, the restricting portion 42 contacts the left side surface of the engaging piece 213 in the figure, thereby locking the swing of the marking member 200A. When the operator pushes the knocking body 40 toward the base end of the bolt 5 from this state, as shown in FIG. 6, the restricting portion 42 moves toward the base end of the bolt 5 as the knocking body 40 is displaced. This allows the engaging piece 213 to move leftward in the figure, unlocking the marking member 200A. As shown in FIG. 7, when the operator pushes the pushing lever portion 220A of the marking member 200A toward the inside of the housing 10A while keeping the knocking body 40 pressed in, the marking member 200A swings toward the marking target, and the printing body 250 comes into contact with the marking target, allowing the mark to be applied.

[0035] After marking the marking object, when the operator releases the pressure on the push lever portion 220A, the marking member 200A returns to the unused state shown in Fig. 6 due to the biasing force of the biasing member 212. When the operator subsequently releases the pressure on the knock body 40, the knock body 40 returns to the unused state shown in Fig. 6 due to the elastic member 41, and the swing of the marking member 200A is locked again.

[0036] With the marking device 1A equipped with the locking mechanism described above, the operator can smoothly unlock and mark by a series of actions: pressing the knock body 40 with the palm of his / her hand while depressing the push-in lever portion 220A. This allows the marking operation to be performed without moving the hand that performed the unlocking operation, improving operability. Furthermore, since the marking member 200A is automatically locked when the operator releases his / her hand from the lever portion 220A and the knock body 40, there is no need for the operator to perform an operation to return the locking mechanism from the unlocked state to the locked state, improving convenience.

[0037] Next, the positional relationship between the marking member 200A and the marking target will be described using Fig. 8 as an example. As shown in Fig. 8, a first vector V1 is a vector that starts at a first corner MC1 of the marking target on which the marking device 1A is placed and ends at the center 31 of the support shaft 30, which is the swing center of the marking member 200A. A second vector V2 is a vector that starts at the first corner MC1, is perpendicular to the central axis C of the bolt 5, which is the marking target, and points in a direction away from the bolt 5. The angle θ1 between the first vector V1 and the second vector V2 is a so-called obtuse angle that is greater than or equal to 90 degrees and less than 180 degrees. In the example shown in Fig. 8, the angle θ1 is approximately 116 degrees.

[0038] Similarly, in the example shown in FIG. 9, the angle θ2 between the first vector V1 and the second vector V2, both of which have their starting point at the second marked corner MC2, is an obtuse angle. Note that the angle θ2 in this example is approximately 116 degrees. Similarly, in the example shown in FIG. 10, the angle θ3 between the first vector V1 and the second vector V2, both of which have their starting point at the third marked corner MC3, is an obtuse angle. Note that the angle θ3 in this example is approximately 113 degrees. At each marked corner, the angle between the first vector and the second vector is preferably 100 to 150 degrees, and more preferably 110 to 140 degrees.

[0039] 6 and 7, each convex corner of the printing body 250 that is displaced in accordance with the marking operation contacts each corresponding corner to be marked from diagonally above in the figure, and each convex corner and each corner to be marked are firmly in contact with each other. Therefore, it is possible to provide a marking device 1 that can apply clear marks without interruption. It is preferable that the marking device 1 be configured so that the printing surface 251 approaches the object to be marked from diagonally above in the figure, or at least approaches and contacts it from directly beside.

[0040] The positional relationship in which the first vector V1 and the second vector V2 at each corner to be marked form an obtuse angle also holds for each convex corner when the printing body 250 is in a position where it can come into contact with the object to be marked. That is, in the marking device 1 of the present invention, when the printing body 250 has at least one convex corner and the printing surface 251 is in a position where it can come into contact with the object to be marked contained inside the hollow portion 11, the angle formed by a vector starting from the convex corner and ending at the center of oscillation of the marking member 200A and a vector starting from the convex corner, intersecting the central axis C' of the hollow portion 11 at right angles and pointing in a direction away from the central axis C' is greater than or equal to 90 degrees and less than 180 degrees.

[0041] (Second embodiment) Next, a second embodiment of the present invention will be described. The main feature of the marking device 1B of the second embodiment is that the operator does not directly press the marking member 200B with his / her hand, but presses the holder 43 provided in the housing 10B, thereby pressing the marking member 200B in and performing marking. Here, differences from the first embodiment will be mainly described, and components having the same functions as those in the first embodiment will be assigned the same reference numerals and will not be described again.

[0042] 11 to 13, the marking device 1B of the second embodiment has a holder 43 provided on the upper side of the housing 10B in the figures. The holder 43 of the embodiment is attached to the housing 10B via an elastic member 44 and is movable from the tip to the base end of the fastening member, which is the object to be marked. The elastic member 44 of the present embodiment is a compression coil spring, and the holder 43 is a lid-like member that covers the housing 10B, but the present invention is not limited to these configurations.

[0043] The holder 43 of this embodiment includes a pressing portion 45 that can press the push-in lever portion 220B of the marking member 200B. As shown in FIGS. 13 and 14 , the pressing portion 45 of this embodiment is a pin that engages with a guide groove 46 that is formed in the housing 10B and has an elongated hole shape extending in the vertical direction in the figure, and is positioned so that it can contact the upper surface of the push-in lever portion 220B in the figure. As the holder 43 is pressed from the tip end toward the base end of the bolt 5, the pressing portion 45 moves downward in the figure, and can press the push-in lever portion 220B downward in the figure. When pressed down, the marking member 200B swings around the support shaft 30 as the swing center in a direction in which the printing body 250 approaches the marking object, and can come into contact with the marking object to apply a mark.

[0044] With this configuration, the operator can mark the object by placing the marking device 1B over the object and pushing the holder 43 in, thereby reducing the number of steps required for the marking operation.

[0045] In this example, the entire pressing portion 45 and the push lever portion 220B are located inside the holder 43, but this is not limiting and a structure in which a portion is exposed to the outside of the holder 43 is also possible. The marking device 1B of the embodiment also includes a stamp face cap 15 that covers the bottom opening 12, which can prevent unintended adhesion of ink stains.

[0046] Although the present invention has been described above using the embodiment as an example, the present invention is not limited to the above embodiment and can be embodied in various forms. For example, the marking device 1A of the first embodiment may be provided with a stamp face cap 15. [Explanation of symbols]

[0047] 1. Marking device 10. Cabinet 11 Cavity 13 Notch 200 Marking material 220 Push-in lever part 250 printables 251 Printing surface 252 First convex corner 253 Second convex corner 254 Third convex corner 30 Spindle 40 Knock Body 42 Regulatory Department 43 Holder 45 Pressing part 5 volts 6 nuts 7 Washers 8 Parts to be fastened MC1 First marked corner MC2 Second marked corner MC3 Third marked corner C Bolt center axis C´ Central axis of the cavity V1 First Vector V2 Second vector

Claims

1. A fastened member and a fastening member fastened to the fastened member are used as marking objects, a marking device including a housing that covers the fastening member, and a marking member that is connected to the housing via a support shaft and can swing toward the fastening member around the support shaft as a swing center, a vector having a start point at a corner to be marked, which is a portion to be marked at a boundary between the marking objects, and an end point at the swing center is defined as a first vector; When a vector that has the marked corner as a starting point, is perpendicular to the central axis of the fastening member, and points in a direction away from the fastening member is defined as a second vector, A marking device, characterized in that the angle formed between the first vector and the second vector is equal to or greater than 90 degrees and less than 180 degrees.

2. 2. The marking device according to claim 1, wherein the marking member has a protruding portion that protrudes outside the housing, and a mark is applied to the object to be marked by pressing the protruding portion.

3. a knock body that is attached to a housing via an elastic member and is movable from the tip end of the fastening member toward the base end, and a restricting portion that is capable of restricting the movement of the marking member, the restricting portion restricts the rotation of the marking member when the marking device is not in use, The marking device according to claim 2, wherein when the marking device is used, the knock body is pushed in a direction approaching the fastening member, thereby releasing the restriction of the restricting portion from the marking member.

4. a holder attached to a housing via an elastic member and movable from the distal end of the fastening member toward the proximal end thereof; the holder is provided with a pressing portion capable of pressing the marking member, The marking device according to claim 1, wherein when the marking device is used, the holder is pushed in a direction approaching the fastening member, causing the pressing portion to press the marking member and apply a mark to the object to be marked.

Images