Marking torque wrench and its socket

Abstract

To put a check mark which can easily confirm that there is no looseness in bolts (or nuts) without change of tools and occurrence of variation in construction quality.SOLUTION: When a tightening torque in a bolt fastening direction T reaches a set fastening torque, a rear end part of a support member 3 of a socket installation part 4 so moves as to be deviated downward as shown against a force energized upward as shown. A push-up protrusion 17, a switch member 16 and a first ink shield member 24 are moved as shown by arrows a2, b2, c2 respectively via a link pin 18 for switch and a link pin 21 for shield in linkage with one another. An ink P, which has been discharged in such a manner that an ink tank 12 is compressed by the switch member 16, instantly flows out from an ink lead-out path 13 to one ink lead-out groove 41b, 41c, 41d, which contacts from a side of a bolt B to a surface or a side of a washer W and a surface of a fastening part R via an ink lead-out port 14 of the socket installation part 4 and a socket side ink lead-out path 41.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] SUMMARY OF THE INVENTION An embodiment of the present invention relates to a marking torque wrench and its socket. [Background technology]

[0002] For example, in electrical equipment in a plant, some bolts and nuts used in assembling structures require tightening torque management.

[0003] Conventionally, to be able to confirm that a bolt (or nut) has been tightened to the specified tightening torque, after tightening the bolt to the specified tightening torque with a torque wrench, a check mark is made with an oil-based pen or the like, drawing a line through the bolt, spring washer, flat washer, and tightening point. This check mark makes it possible to check at a glance whether the bolt has loosened.

[0004] However, when using a pen or other tool to mark check marks, not only is it time-consuming to use a torque wrench and pen when tightening the bolts, but it can also lead to variations in construction quality, such as forgetting to mark check marks or marking them in places that are difficult to see.

[0005] On the other hand, a marking torque wrench has been developed that has the function of stamping (marking) the top surface of the bolt head when the tightening torque reaches a specified value when the torque wrench is used to tighten the bolt (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Japanese Patent Application Laid-Open No. 2009-125906 Summary of the Invention [Problem to be solved by the invention]

[0007] The stamps and marks made by conventional marking torque wrenches are intended to indicate that the bolt has been tightened to the specified tightening torque, and are not made continuously from the bolt to the spring washer, flat washer, and tightening point.

[0008] For this reason, even if a bolt is tightened to a specified tightening torque and then loosened or removed, it is not possible to check at a glance whether the bolt has loosened.

[0009] The problem to be solved by the present invention is to provide a marking torque wrench and its socket that can easily mark a bolt (or nut) to confirm that it is not loose, without having to change tools or causing variations in construction quality. [Means for solving the problem]

[0010] The marking torque wrench and its socket according to the embodiment are: a handle that is gripped by a user and rotated in accordance with the tightening of a bolt or a nut; an elastic bag-shaped ink tank that is loaded inside the handle and filled with ink; an ink tank replacement window formed in a side surface of the handle for replacing an ink tank installed inside the handle; an ink switch mechanism that compresses the ink tank in conjunction with the movement of a member within the handle when the tightening torque of the bolt or nut reaches a preset tightening torque by rotating the handle; an ink outlet path that leads ink ejected from the ink tank in response to compression of the ink tank by the ink switch mechanism to a surface of a socket mounting portion on the socket mounting side; a socket-side ink lead-out path that leads ink led out via the ink lead-out path of the socket mounting portion from one end surface of the socket mounted on the socket mounting portion that faces the socket mounting portion to the other end surface on the side where the bolt or nut is fitted, and that has an ink lead-out groove whose opening contacts from the side surface of the fitted bolt or nut to the surface or side surface of a washer that is fastened together with the bolt or nut and further to the surface of the fastening point of the bolt, The ink tank is loaded into an ink tank loading section that is provided as a recess in a member inside the handle and has a shape corresponding to the ink tank, an ink inlet of the ink lead-out path is formed to communicate with one end of the ink tank loading section where an ink ejection port of the ink tank is located; The ink switch mechanism is configured to rotate the handle so that the tightening torque of the bolt or nut reaches a preset tightening torque, and in response to the movement of a member in the handle, the tip of the ink switch mechanism is made of an elastic material and has an arc-shaped tip that protrudes inward from the side of the ink tank loading section and compresses the ink tank. Switch parts It has the following characteristics. [Brief explanation of the drawings]

[0011] [Figure 1] 1 is a perspective view of a marking torque wrench (when the set torque has not yet been reached) 1 according to an embodiment of the present invention, seen from behind. [Figure 2] 1 is a perspective view of a marking torque wrench (when a set torque is reached) 1 according to an embodiment of the present invention, seen from the front. [Figure 3] 3 is a partial cross-sectional view showing the marking torque wrench (when the set torque is reached) 1 and its socket 40 according to the embodiment, as viewed from above in FIG. 2. [Figure 4] 3 is a partial cross-sectional view showing the marking torque wrench (when the set torque is reached) 1 and its socket 40 according to the embodiment, as viewed from the left in FIG. 2. [Figure 5] FIG. 4 is a plan view showing the socket 40 as viewed from above. [Figure 6]10 is a flowchart showing a procedure including marking when tightening a bolt B (or a nut) using a marking torque wrench 1 and its socket 40. DETAILED DESCRIPTION OF THE INVENTION

[0012] Hereinafter, a marking torque wrench and its socket according to an embodiment will be described with reference to the drawings.

[0013] FIG. 1 is a perspective view of a marking torque wrench (when the set torque has not yet been reached) 1 according to an embodiment, seen from behind.

[0014] FIG. 2 is a perspective view of the marking torque wrench (when the set torque is reached) 1 according to the embodiment, seen from the front.

[0015] FIG. 3 is a partial cross-sectional view showing the marking torque wrench (when the set torque is reached) 1 and its socket 40 according to the embodiment, as viewed from above in FIG.

[0016] FIG. 4 is a partial cross-sectional view showing the marking torque wrench (when the set torque is reached) 1 and its socket 40 according to the embodiment, as viewed from the left in FIG.

[0017] FIG. 5 is a plan view showing the socket 40 as viewed from above.

[0018] 1 and 2, the left side of the drawing corresponds to the direction of the tip of the marking torque wrench 1, and the right side of the drawing corresponds to the direction of the rear end of the marking torque wrench 1.

[0019] <Regarding the bolt tightening mechanism of the marking torque wrench 1 and its socket 40> A marking torque wrench (also simply referred to as a "wrench") 1 has a cylindrical, rod-shaped handle 2 that is held by a user.

[0020] A rod-shaped support member 3 is provided at the tip of the handle 2 and is supported so as to extend from inside the handle 2, and a socket attachment portion (also called a "wrench head") 4 is fixedly provided at the tip of the support member 3. The support member 3 is supported at its rod-shaped middle portion so as to be rotatable in the direction opposite to the bolt tightening direction T, with the tip of the handle 2 as a fulcrum.

[0021] A socket coupling portion 15 having a rectangular cross section is provided protruding from the center of the front surface of the socket mounting portion 4. As shown in Figures 3 and 4, the socket coupling portion 15 is fitted into a wrench coupling recess 43 formed on the upper end of the socket 40, and the socket 40 is detachably coupled to the socket mounting portion 4 to form an integrated unit.

[0022] The socket 40 has a cylindrical shape with a larger outer diameter at the lower end, and the head (or nut) of the bolt B is fitted into the bolt fitting recess 42 with a hexagonal cross section formed on the lower end side opposite the wrench coupling recess 43.The bolt B is tightened to the tightening point R via the washer W by rotating the socket 40 in conjunction with the rotation of the handle 2 of the wrench 1 in the bolt tightening direction T.

[0023] At the lower end of the bolt fitting recess 42 of the socket 40, a washer fitting recess 42a having a circular cross section and serving as a space corresponding to the outer diameter and thickness of the washer W is formed continuously.

[0024] On the other hand, as shown in Figures 1 and 2, a torque adjustment unit 5 is provided at the rear end of the handle 2 of the wrench 1, and from the torque adjustment unit 5 to the inside of the handle 2, a screw-shaped torque adjustment mechanism 6, a torque generating spring 7, and a rod-shaped torque transmission member 8 are provided in series.

[0025] The tip of the torque transmission member 8 and the rear end of the support member 3 of the socket mounting portion 4 are connected by a connecting member 9 that can be reversed in the direction indicated by arrow x1 in FIG. 1 and arrow x2 in FIG. 2, with the upper part of the tip of the torque transmission member 8 as shown in FIG. 1 (i.e., the end opposite the bolt tightening direction T by the handle 2) and the lower part of the rear end of the support member 3 as shown in FIG. 1 (i.e., the end on the side of the bolt tightening direction T by the handle 2), respectively, as fulcrums.

[0026] The support member 3 of the socket mounting portion 4 and the torque transmission member 8 are arranged with a certain space in relation to the inner diameter of the handle 2, and a protrusion 10 is provided on the side of the tip of the torque transmission member 8 on the upper side as shown in Figure 1, which abuts against the inner wall of the handle 2 to maintain a certain space.

[0027] When the tightening torque is adjusted using the torque adjustment unit 5, the torque generation spring 7 contracts via the torque adjustment mechanism 6 in a direction that pushes the torque transmission member 8 toward its tip, for example, when the tightening torque is increased, and expands in the opposite direction when the tightening torque is decreased.

[0028] The maximum tightening torque that can be set by the marking torque wrench 1 of this embodiment is, for example, 50 N·m.

[0029] When the set torque in the bolt tightening direction T has not been reached, including when the marking torque wrench 1 is not tightening the bolt B (or nut), the spring force of the torque generating spring 7 urges the connecting member 9 in the direction indicated by the arrow x1, i.e., the tip of the torque transmission member 8 is biased upward in the figure and the rear end of the support member 3 is biased downward in the figure, as shown in FIG.

[0030] On the other hand, when the set torque is reached by tightening the bolt B (or nut) with the marking torque wrench 1, the rear end of the support member 3, which has the socket mounting portion 4 at its tip, moves upward in the figure against the force exerted downward in the figure from the torque generating spring 7 via the torque transmission member 8 and the connecting member 9.

[0031] That is, in this case, as shown in Figure 2, the connecting member 9 between the torque transmission member 8 and the support member 3 rotates in the direction indicated by the arrow x2, and the tip of the torque transmission member 8 shifts upward as shown in the figure, while the rear end of the support member 3 shifts downward as shown in the figure, which is the direction opposite to the bolt tightening direction T.

[0032] At this time, the tightening force in the bolt tightening direction T is released by the reverse rotation of the connecting member 9 and is no longer transmitted to the socket mounting portion 4 (this state is also called the "wrench head" neck break state), and the bolt B is tightened at the set tightening torque value.

[0033] In this state, when the tightening of the bolt B, which is performed by rotating the handle 2 in the bolt tightening direction T, is stopped, the force that causes the rear end of the support member 3 having the socket mounting portion 4 to shift and move in the direction indicated by the arrow x2 in Figure 2 is eliminated, and as shown in Figure 1, the connecting member 9 rotates again in the direction indicated by the arrow x1, and the wrench 1 returns to its original state.

[0034] <About the marking mechanism of the marking torque wrench 1 and its socket 40> As shown in Figure 1, an ink tank loading section 11, which is, for example, an oval recess, is provided on the side of the support member 3 located inside the handle 2, near the rear end of the support member 3 of the socket mounting section 4, and an oval, bag-shaped, elastic ink tank 12 corresponding to the loading section 11 is loaded into the ink tank loading section 11.

[0035] The ink tank 12 is filled with ink P, which is the base for marking. For example, the tip of the ink tank 12 in the major axis direction is closed when the ink tank 12 is not in use, but is formed as an ink ejection port that easily opens when a compressive force is applied to the ink tank 12 and ejects the ink P. The ink ejection port of the ink tank 12 is temporarily glued and closed during the manufacture of the ink tank 12, for example, and is therefore easily opened when the internal pressure of the ink tank 12 increases.

[0036] It should be noted that a plurality of types of ink tanks 12 filled with ink P of different colors are prepared.

[0037] Furthermore, inside the support member 3 of the socket mounting portion 4, a thin tube-shaped ink discharge path 13 is formed, which is connected to the tip of the ink tank loading portion 11 in the long diameter direction and extends linearly to the vicinity of the socket coupling portion 15 of the socket mounting portion 4.

[0038] 3 and 4, the vicinity of the socket coupling portion 15 of the socket mounting portion 4, to which the ink leading path 13 extends, is a position that reaches above the thick portion of the peripheral edge of the socket 40 when the socket 40 is mounted on the socket mounting portion 4, and at this position the ink leading path 13 has an annular groove 14a that corresponds to the peripheral edge of the socket 40 and faces the surface of the socket mounting portion 4, and is connected to an ink leading port (ink leading path connecting portion) 14 that is formed in the same annular shape and protrudes from the surface of the socket mounting portion 4. The communicating portion between the ink leading path 13 and the ink leading port (ink leading path connecting portion) 14 has a structure in which the ink P does not leak and is sealed, so that ink P does not leak even during rotation operations such as tightening the bolts.

[0039] A socket-side ink discharge path 41 is formed in the thick portion of the peripheral edge of the socket 40, and connects to a circular ink discharge port (ink discharge path connecting portion) 14 protruding from the surface of the socket mounting portion 4 when the socket 40 is mounted in the socket mounting portion 4.

[0040] The socket-side ink discharge path 41 is formed in a thin tube shape extending from the upper end to the lower end of the socket 40 in the thick portion of the periphery of the socket 40, and is exposed as a single ink discharge groove 41b, 41c, 41d formed continuously at a position corresponding to the bolt fitting recess 42, starting from the side wall of the bolt fitting recess 42 corresponding to the side surface of the bolt B (or nut), and continuing to the upper wall or side wall of the washer fitting recess 42a corresponding to the surface or side surface of the washer W, and further to the lower end surface of the socket 40 corresponding to the surface of the fastening point R.

[0041] The ink inlet of the socket-side ink discharge path 41 exposed at the upper end of the socket 40 is formed as a circular ink introduction groove 41a with the same radius from the central axis of the bolt fitting recess 42 so that the connection with the circular ink discharge port 14 of the socket mounting portion 4 is maintained in a tight contact state even if a rotation difference occurs between the socket mounting portion 4 on the wrench 1 side and the socket 40 when the bolt B (or nut) is tightened by the marking torque wrench 1.

[0042] The ink introduction groove 41a is formed as a funnel-shaped ink gathering portion 41at (see FIGS. 4 and 5) before and after the ink inlet, which is a thin tube, of the ink delivery path 41, toward the ink inlet, which is a thin tube.

[0043] When the bolt B (or nut) is tightened using the marking torque wrench 1 and its socket 40, ink P is drawn from the ink outlet path 13 on the wrench 1 side through the socket side ink outlet path 41 to one ink outlet groove 41b, 41c, 41d, and a check mark CM is added (marked) in ink P from the side of the bolt B (or nut) where the opening surfaces of the ink outlet grooves 41b, 41c, 41d contact, to the surface or side of the washer W and further to the surface of the tightening point R.

[0044] As shown in Figures 1 and 2, at the rear end of the support member 3 having the socket mounting portion 4, a push-up protrusion 17 is provided on the side that shifts upward in Figure 1 (downward in Figure 2) when the set torque is reached.

[0045] In addition, a hole is formed on the side of the support member 3 where the push-up protrusion 17 is provided, which is connected to the side of the ink tank loading section 11 in the short diameter direction, and a switch member 16 is provided in the hole so that it fits into the hole and can move up and down like a piston.

[0046] A switch link pin 18 that supports an intermediate support portion 19 from the housing side of the handle 2 is suspended between the head support portion 20a of the push-up convex portion 17 and the head support portion 20b of the switch member 16.

[0047] The ink switch mechanism, which includes the push-up convex portion 17, the switch link pin 18, and the switch member 16, is configured so that when the set torque in the bolt tightening direction T has not been reached, including when the bolt B (or nut) is not being tightened by the wrench 1, the hemispherical tip of the switch member 16 is in a position that does not protrude inward from the side of the ink tank loading section 11 and does not compress the ink tank 12, as shown in Figure 1.

[0048] On the other hand, the ink switch mechanism is configured such that when the set torque is reached by tightening the bolt B (or nut) with the wrench 1, as shown in Figure 2, the rear end of the support member 3 having the socket mounting portion 4 shifts downward in the figure, and the tip of the switch member 16 protrudes inward from the side of the ink tank loading portion 11 via the push-up convex portion 17 and the switch link pin 18, and moves to a position where it compresses the ink tank 12.

[0049] The tip of the switch member 16 is made of an elastic material such as rubber so as not to damage the surface of the ink tank 12 and is formed in an arc shape.

[0050] In addition, at the ink inlet of the ink outlet path 13 where the ink tank loading section 11 is connected to the ink outlet path 13, a first ink blocking member 24 is provided from above in FIG. 1 (below in FIG. 2) parallel to the movable direction of the switch member 16 to block the ink inlet while maintaining the airtightness of the ink outlet path 13.

[0051] A shielding link pin 21 that supports an intermediate support portion 22 from the side of the support member 3 is suspended between the upper support portion 23b of the first ink shielding member 24 and the side support portion 23a of the switch member 16.

[0052] The first ink shielding mechanism, which includes the switch member 16, the shielding link pin 21, and the first ink shielding member 24, is configured so that when the set torque in the bolt tightening direction T has not been reached, including when the bolt B (or nut) is not being tightened by the wrench 1, the tip of the first ink shielding member 24 is in a position that blocks the ink inlet of the ink leading path 13, as shown in FIG. 1.

[0053] On the other hand, when the set torque is reached by tightening the bolt B (or nut) with the wrench 1, the first ink blocking mechanism is configured to work in conjunction with the switch member 16 of the ink switch mechanism, as shown in Figure 2, and move from the switch member 16 via the blocking link pin 21 to a position where the tip of the first ink blocking member 24 opens the ink inlet of the ink lead-out path 13 without blocking it.

[0054] In addition, in the ink leading path 13, immediately downstream of the ink inlet where the first ink blocking member 24 is provided, a second ink blocking member 25 for blocking the ink leading path 13 is provided from above in Figure 1 (below in Figure 2) parallel to the movable direction of the first ink blocking member 24.

[0055] The second ink blocking member 25 descends in conjunction with pressing down an ON / OFF button 26 provided at the upper end of the second ink blocking member 25, thereby blocking the ink leading path 13. The second ink blocking mechanism including the second ink blocking member 25 and the ON / OFF button 26 is configured to include a spring member 27 interposed between the lower end of the ON / OFF button 26 and the side surface of the support member 3, and a position holding member (not shown) that holds the ON / OFF button 26 in a pressed position against the spring force of the spring member 27 and releases the button when pressed again.

[0056] The tips of the first ink blocking member 24 and the second ink blocking member 25 are made of an elastic material such as rubber, and are configured to maintain airtightness whether the ink lead-out path 13 is in a blocked or open state.

[0057] In the ink switch mechanism (17, 18, 16), the first ink shielding mechanism (16, 21, 24), and the second ink shielding mechanism (25, 26, 27), the parts exposed to the outside from the housing of the handle 2 and the support member 3 of the socket mounting portion 4 are covered by a cover member 28 engaged with the tip side of the handle 2, except for the head of the ON / OFF button 26.

[0058] An ink tank replacement window 31 is formed on the side surface of the handle 2 near the tip at a position corresponding to the ink tank loading section 11 of the support member 3 inside the handle 2.

[0059] The ink tank replacement window 31 is closed by an ink lid 29 made of, for example, a flat rubber plate, which can be opened and closed freely. A handle 30 is provided on the surface of the ink lid 29, for example, by which the user can hook their finger to open and close the ink lid 29.

[0060] Next, the operation of the marking torque wrench 1 and its socket 40 according to the embodiment when tightening the bolt B (or nut) will be described.

[0061] FIG. 5 is a flowchart showing a procedure including marking when tightening a bolt B (or a nut) using the marking torque wrench 1 and its socket 40.

[0062] First, in preparation for the work, the user prepares an ink tank 12 of the desired color as the color of the check mark CM, opens the ink lid 29 on the side of the handle 2, and loads the prepared ink tank 12 into the ink tank loading section 11 through the ink tank replacement window 31.

[0063] Next, the socket 40 is attached to the socket attachment portion 4. At this time, the socket 40 is positioned so that the annular ink inlet (ink introduction groove 41a) of the socket-side ink discharge path 41 exposed at its upper end faces the annular ink discharge outlet (ink discharge path connecting portion) 14 protruding from the surface of the socket attachment portion 4, and the socket 40 is attached by fitting the wrench coupling recess 43 of the socket 40 into the socket coupling portion 15 of the socket attachment portion 4 (step S1).

[0064] At this time, the annular ink inlet (ink introduction groove 41a) of the socket side ink discharge path 41 is tightly fitted to the annular ink discharge outlet (ink discharge path connecting portion) 14 protruding from the surface of the socket mounting portion 4, and even if a rotational difference occurs between the socket mounting portion 4 and the socket 40, the connection is maintained without ink P leaking.

[0065] The user operates the torque adjustment unit 5 to set the tightening torque of the bolt B (or nut) to a specified torque value (step S2).

[0066] The user operates the ON / OFF button 26 to raise the second ink blocking member 25, unblocking the ink outlet path 13 and setting the state so that ink P can be ejected through the ink outlet path 13 (step S3).

[0067] The user fits the bolt B (or nut) into the bolt fitting recess 42 of the socket 40 attached to the socket attachment portion 4, rotates the handle 2 in the bolt tightening direction T, and applies the set tightening torque to the bolt B (step S4).

[0068] At this time, as shown in FIG. 1, the spring force of the torque generating spring 7 urges the connecting member 9 in the direction indicated by the arrow x1, i.e., the tip of the torque transmission member 8 upward and the rear end of the support member 3 downward, and accordingly, the head support portion 20a of the push-up convex portion 17 is urged in the direction indicated by the arrow a1, the head support portion 20b of the switch member 16 is urged in the direction indicated by the arrow b1, and the first ink shielding member 24 is urged in the direction indicated by the arrow c1, respectively, via the switch link pin 18 and the shielding link pin 21.

[0069] Therefore, while the bolt B (or nut) continues to be tightened, no compressive force is applied to the ink tank 12, and the ink inlet of the ink extraction path 13 remains blocked by the first ink blocking member 24, so that ink P is not ejected from the ink tank 12.

[0070] After this, when the tightening torque of bolt B reaches the set tightening torque, the rear end of support member 3 of socket mounting portion 4 moves upward in the figure against the force exerted downward in Figure 1 by torque generating spring 7 via torque transmission member 8 and connecting member 9.

[0071] As shown in FIG. 2, the connecting member 9 between the torque transmission member 8 and the support member 3 rotates in the direction indicated by the arrow x2, and the rear end of the support member 3 shifts downward in the figure, the head support portion 20a of the push-up convex portion 17 moves in the direction indicated by the arrow a2, the head support portion 20b of the switch member 16 moves in the direction indicated by the arrow b2, and the first ink shielding member 24 moves in the direction indicated by the arrow c2, all in conjunction with each other via the switch link pin 18 and the shielding link pin 21.

[0072] Therefore, when the tightening torque of the bolt B (or nut) reaches the set tightening torque, the ink tank 12 is compressed by the switch member 16, the ink inlet of the ink extraction path 13 is opened, and the ink P in the ink tank 12 is ejected from the ink ejection port of the ink tank 12.

[0073] The ink P then flows instantly from the ink discharge path 13 through the ink discharge outlet (ink discharge path connecting portion) 14 of the socket mounting portion 4 and the socket-side ink discharge path 41 shown in Figures 3 and 4, from the side of the bolt B (or nut) to a single ink discharge groove 41b, 41c, 41d whose opening contacts the surface and side of the washer W and the surface of the fastening point R.

[0074] As a result, a single check mark CM is added (marked) from the side of the bolt B (or nut) to the surface or side of the washer W and further to the surface of the fastening point R.

[0075] At this time, the force tightening in the bolt tightening direction T is released by the reversal of the connecting member 9 and is no longer transmitted to the socket mounting portion 4. As a result, the force tending to shift and move the rear end of the support member 3 having the socket mounting portion 4 in the direction indicated by the arrow x2 in Figure 2 is eliminated, and as shown in Figure 1, the connecting member 9 reverses and rotates again in the direction indicated by the arrow x1, and the wrench 1 returns to its original state.

[0076] Therefore, the switch member 16 releases the movement of compressing the ink tank 12, and the first ink blocking member 24 blocks the ink inlet of the ink lead-out path 13 again, stopping the ejection of ink P.

[0077] The user removes the wrench 1 and its socket 40 from the bolt B that has been tightened (step S5), and checks the check mark CM that has been marked in one line from the side of the bolt B (or nut) to the surface or side of the washer W and further to the surface of the tightening point R (step S6).

[0078] This completes the tightening operation including marking of the bolt B (or nut) using the marking torque wrench 1 and its socket 40.

[0079] As described above, the marking torque wrench 1 and its socket 40 of the embodiment make it possible to mark a check mark CM that allows easy confirmation that the bolt B (or nut) is not loose, without having to change tools or causing variations in construction quality.

[0080] In the marking torque wrench 1 of the embodiment, the ink tank loading section 11 and the ink discharge path 13, the ink switch mechanism including the push-up convex section 17, the switch link pin 18, and the switch member 16, the first ink shielding mechanism including the switch member 16, the shielding link pin 21, and the first ink shielding member 24, and the second ink shielding mechanism including the second ink shielding member 25 and the ON / OFF button 26 are all configured to be partially built into the support member 3 of the socket mounting section 4, but they may also be configured using the space within the handle 2 and the space within the cover member 28.

[0081] In this case, for example, a flexible tube is used as the ink discharge path 13 connected to the ink discharge port of the ink tank 12, and the ink discharge path 13 of the flexible tube is connected to the ink discharge outlet (ink discharge path connecting portion) 14 of the socket mounting portion 4.

[0082] Furthermore, it goes without saying that multiple types of sockets 40 are prepared according to the diameter of the bolt B (or nut), but the configuration of the upper end of the multiple types of sockets 40 is standardized, including the wrench coupling recess 43 and the annular ink inlet (ink introduction groove 41a) of the socket side ink discharge path 41.

[0083] Although several embodiments of the present invention have been described, these embodiments are presented as examples and are not intended to limit the scope of the invention. These novel embodiments can be embodied in various other forms, and various omissions, substitutions, and modifications can be made without departing from the spirit of the invention. These embodiments and their modifications are included within the scope and spirit of the invention, and are also included in the scope of the invention and its equivalents as defined in the claims. [Explanation of symbols]

[0084] 1...marking torque wrench, 2...handle, 3...support member for socket mounting portion, 4...socket mounting portion, 5...torque adjustment portion, 6...torque adjustment mechanism, 7...torque generating spring, 8...torque transmission member, 9...connecting member, 11...ink tank loading portion, 12...ink tank, 13...ink lead-out path, 14...ink lead-out port (ink lead-out path connecting portion), 15...socket coupling portion, 16...switch member, 24...first ink shielding member, 25...second ink Ink shielding member, 26...ON / OFF button, 28...cover member, 29...ink lid, 31...ink tank replacement window, 40...socket, 41...socket side ink discharge path, 41a...ink introduction groove, 41at...ink collection section, 41b to 41d...ink discharge groove, 42...bolt fitting recess, 42a...washer fitting recess, 43...wrench connection recess, B...bolt (or nut), W...washer, R...tightening point, P...ink, CM...check mark.

Claims

1. a handle that is gripped by a user and rotated in accordance with the tightening of a bolt or a nut; an elastic bag-shaped ink tank that is loaded inside the handle and filled with ink; an ink tank replacement window formed in a side surface of the handle for replacing an ink tank installed inside the handle; an ink switch mechanism that compresses the ink tank in conjunction with the movement of a member within the handle when the tightening torque of the bolt or nut reaches a preset tightening torque by rotating the handle; an ink outlet path that leads ink ejected from the ink tank in response to compression of the ink tank by the ink switch mechanism to a surface of a socket mounting portion on the socket mounting side; a socket-side ink lead-out channel that leads ink led out via the ink lead-out channel of the socket mounting section from one end surface of the socket mounted on the socket mounting section that faces the socket mounting section to the other end surface on the side where the bolt or nut is fitted, and has an ink lead-out groove whose opening extends from the side surface of the fitted bolt or nut to the surface or side surface of a washer that is fastened together with the bolt or nut and further to the surface of the fastening point of the bolt; Equipped with The ink tank is loaded into an ink tank loading section that is provided as a recess in a member inside the handle and has a shape corresponding to the ink tank, an ink inlet of the ink lead-out path is formed to communicate with one end of the ink tank loading section where an ink ejection port of the ink tank is located; the ink switch mechanism has an arc-shaped switch member with an elastic tip that protrudes inward from the side surface of the ink tank loading section and compresses the ink tank in response to movement of a member within the handle when the tightening torque of the bolt or nut reaches a preset tightening torque through rotation of the handle, Marking torque wrench and its socket.

2. a first ink blocking mechanism that blocks the space between the ink ejection port of the ink tank and the ink inlet of the ink leading path when the tightening torque of the bolt or nut does not reach a preset tightening torque, and that opens the blockage in conjunction with movement of a member within the handle when the tightening torque of the bolt or nut reaches the preset tightening torque by rotating the handle; 2. The marking torque wrench and its socket according to claim 1.

3. the ink outlet path is formed in communication with an ink outlet port that protrudes and is formed on a surface of the socket mounting portion on the side where the socket is mounted, the ink outlet is connected to the ink inlet of the socket-side ink outlet path on one end surface of the socket mounted to the socket mounting portion, the end surface facing the socket mounting portion; 3. The marking torque wrench and its socket according to claim 1 or 2.

4. a second ink blocking mechanism that blocks or opens the ink lead-out path in response to a user operation; 4. The marking torque wrench and its socket according to claim 1.

5. a handle that is gripped by a user and rotated in accordance with the tightening of a bolt or a nut; an elastic bag-shaped ink tank that is loaded inside the handle and filled with ink; an ink tank replacement window formed in a side surface of the handle for replacing an ink tank installed inside the handle; an ink switch mechanism that compresses the ink tank in conjunction with the movement of a member within the handle when the tightening torque of the bolt or nut reaches a preset tightening torque by rotating the handle; an ink outlet path that leads ink ejected from the ink tank in response to compression of the ink tank by the ink switch mechanism to a surface of the socket mounting portion on the socket mounting side, The ink tank is loaded into an ink tank loading section that is provided as a recess in a member inside the handle and has a shape corresponding to the ink tank, an ink inlet of the ink lead-out path is formed to communicate with one end of the ink tank loading section where an ink ejection port of the ink tank is located; the ink switch mechanism has an arc-shaped switch member with an elastic tip that protrudes inward from a side surface of the ink tank loading section and compresses the ink tank in response to movement of a member within the handle when the tightening torque of the bolt or nut reaches a preset tightening torque by rotating the handle, The socket guides ink drawn out through the ink drawing path of the socket mounting portion from one end surface of the socket mounted on the socket that faces the socket mounting portion to the other end surface on the side where the bolt or nut is fitted, and is provided with a socket-side ink drawing path having an ink drawing groove whose opening extends from the side of the fitted bolt or nut to the surface or side of a washer that is tightened together with the bolt or nut, and further to the surface of the tightening point of the bolt.

6. a handle that is gripped by a user and rotated in accordance with the tightening of a bolt or a nut; an elastic bag-shaped ink tank that is loaded inside the handle and filled with ink; an ink tank replacement window formed in a side surface of the handle for replacing an ink tank installed inside the handle; an ink switch mechanism that compresses the ink tank in conjunction with the movement of a member within the handle when the tightening torque of the bolt or nut reaches a preset tightening torque by rotating the handle; an ink outlet path that leads ink ejected from the ink tank in response to compression of the ink tank by the ink switch mechanism to a surface of the socket mounting portion on the socket mounting side, The ink tank is loaded into an ink tank loading section that is provided as a recess in a member inside the handle and has a shape corresponding to the ink tank, an ink inlet of the ink lead-out path is formed to communicate with one end of the ink tank loading section where an ink ejection port of the ink tank is located; the ink switch mechanism is a socket for a marking torque wrench, which has an arc-shaped switch member with an elastic tip that protrudes inward from a side surface of the ink tank loading section and compresses the ink tank in conjunction with movement of a member inside the handle when the tightening torque of the bolt or nut reaches a preset tightening torque by rotating the handle, A socket equipped with a socket-side ink discharge path that discharges ink via an ink discharge path in the socket mounting portion of the marking torque wrench from one end surface of the socket mounted on the socket mounting portion that faces the socket mounting portion to the other end surface on the side where the bolt or nut is fitted, and that has an ink discharge groove whose opening extends from the side of the fitted bolt or nut to the surface or side of a washer that is tightened together with the bolt or nut, and further to the surface of the tightening point of the bolt.

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