JP2022133888A - Marking torque wrench and socket thereof - Google Patents

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

Embodiments of the present invention relate to a marking torque wrench and its socket.

For example, in the electrical equipment of a plant, some bolts and nuts used to assemble structures require tightening torque control.

Conventionally, in order to confirm that the bolt (or nut) has been tightened with a specified tightening torque, after tightening the bolt with a specified tightening torque using a torque wrench, the spring washer, Checkmarks are drawn with a straight line across the flat washers and tightening points using an oil-based pen or the like. This check mark makes it possible to check at a glance whether the bolt is loose or not.

However, in the method of attaching check marks with a pen, etc., a torque wrench and a pen are used to tighten the bolts, which not only requires time and effort such as changing hands, but also forgets to attach check marks and makes it difficult to see the check marks. There are variations in construction quality, such as sticking to the position.

On the other hand, when a torque wrench is used to tighten a bolt, when the tightening torque reaches a specified value, there is a marking torque wrench that stamps (marks) the top surface of the bolt head. It is considered (for example, see Patent Document 1).

JP 2009-125906 A

Stamps and marks attached by conventional marking torque wrenches are intended to indicate that the bolt has been tightened to the specified tightening torque, and are continuous from the bolt to the spring washer, flat washer, and tightening point. It is not something that can be attached.

Therefore, even if the 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 is loose.

The problem to be solved by the present invention is a marking torque wrench that makes it possible to attach a check mark that can easily confirm that there is no loosening of the bolt (or nut) without changing the tool or causing variations in construction quality. and to provide its socket.

The marking torque wrench and its socket according to the embodiment are
a handle that is gripped by a user and rotated as the bolt or nut is tightened;
an elastic bag-like ink tank loaded inside the handle and filled with ink;
an ink switch mechanism that compresses the ink tank in conjunction with the movement of members in the handle when the tightening torque of the bolt or nut reaches a preset tightening torque due to the rotating operation of the handle;
an ink lead-out path for leading the ink ejected from the ink tank in response to the compression of the ink tank by the ink switch mechanism to the surface of the socket mounting part on which the socket is mounted;
The ink drawn out through the ink lead-out path of the socket mounting portion is transferred from the surface of one end of the socket mounted on the socket mounting portion facing the socket mounting portion to the other end of the side where the bolt or nut is fitted. Socket-side ink having an ink lead-out groove whose opening contacts the surface of the bolt or nut to be fitted, the surface or side surface of the washer tightened together with the bolt or nut, and the surface of the tightening part of the bolt. and a derivation path.

FIG. 2 is a rear view of the marking torque wrench (when the set torque is not reached) 1 according to the embodiment; 1 is a front perspective view of a marking torque wrench (when a set torque is reached) 1 of the embodiment; FIG. Fig. 3 is a partial cross-sectional view showing the marking torque wrench (at the time of reaching the set torque) 1 and its socket 40 of the embodiment, viewed from above Fig. 2; Fig. 3 is a partial cross-sectional view showing the marking torque wrench (when the set torque is reached) 1 and its socket 40 of the embodiment, viewed from the left in Fig. 2; FIG. 4 is a plan view showing the socket 40 as viewed from above; 4 is a flowchart showing a work procedure including marking accompanying tightening of a bolt B (or nut) using the marking torque wrench 1 and its socket 40;

Hereinafter, a marking torque wrench and its socket according to embodiments will be described with reference to the drawings.

FIG. 1 is a rear view of a marking torque wrench (when the set torque is not reached) 1 according to the embodiment.

FIG. 2 is a front perspective view of the marking torque wrench (at the time of reaching the set torque) 1 of the embodiment.

FIG. 3 is a partial cross-sectional view showing the marking torque wrench (when the set torque is reached) 1 and its socket 40 of the embodiment as viewed from above FIG.

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

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

1 and 2, the left direction in the drawing is the direction of the tip of the marking torque wrench 1, and the right direction in the drawing is the direction of the rear end of the marking torque wrench 1. As shown in FIG.

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

A rod-shaped support member 3 supported so as to extend from the inside of the handle 2 is provided at the tip of the handle 2, and a socket mounting portion (also called "wrench head") is provided at the tip of the support member 3. 4 are fixedly provided. The support member 3 is rotatably supported in the direction opposite to the bolt tightening direction T with the distal end portion of the handle 2 as a fulcrum at its bar-shaped intermediate portion.

A socket connecting portion 15 having a rectangular cross section is provided at the center of the front face of the socket mounting portion 4 so as to protrude. As shown in FIGS. 3 and 4, the socket coupling portion 15 is fitted into a wrench coupling recess 43 formed in the upper end portion of the socket 40, and the socket 40 is detachably coupled to the socket mounting portion 4 for integration. do.

The socket 40 has a cylindrical shape with a larger outer diameter at its lower end. (or a nut) is fitted, and the socket 40 rotates in conjunction with the rotation of the handle 2 of the wrench 1 in the bolt tightening direction T to tighten the bolt B to the tightening point R via the washer W.

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 having a space corresponding to the outer diameter and thickness of the washer W is continuously formed.

On the other hand, as shown in FIGS. 1 and 2, a torque adjusting portion 5 is provided at the rear end portion of the handle 2 of the wrench 1, and a screw-like torque adjusting mechanism is provided inside the handle 2 from the torque adjusting portion 5. 6. A torque generation spring 7 and a rod-like torque transmission member 8 are provided in series.

The distal end portion of the torque transmission member 8 and the rear end portion of the support member 3 of the socket mounting portion 4 are located above the distal end portion of the torque transmission member 8 in FIG. 1 (that is, the end on the side of the bolt tightening direction T by the handle 2) of the rear end of the support member 3, and the arrow x1 in FIG. 1 and the arrow x2 in FIG. are connected by a connecting member 9 that can be reversed in the direction shown in FIG.

The support member 3 of the socket mounting portion 4 and the torque transmission member 8 are arranged with a certain space with respect to the inner diameter of the handle 2. A protrusion 10 is provided which abuts against the inner wall of the to maintain a constant space.

When the tightening torque is adjusted by the torque adjuster 5, the torque generating spring 7 is contracted via the torque adjuster 6 in the direction of pushing the torque transmission member 8 toward its tip when the tightening torque is increased. , and when the tightening torque is reduced, it elongates.

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

When the set torque in the bolt tightening direction T is not reached, including the state in which the bolt B (or nut) is not tightened by the marking torque wrench 1, as shown in FIG. The rear end portion of the member 3 means that the connecting member 9 moves in the direction indicated by the arrow x1 by the spring force of the torque generating spring 7, that is, the front end portion of the torque transmission member 8 moves upward in the drawing, and the rear end portion of the support member 3 moves upward in the drawing. downwardly biased.

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 having the socket mounting portion 4 at its tip is pushed from the torque generation spring 7 to the torque transmission member. 8 and connecting member 9, it moves upward in the figure against the force that is urged downward in the figure.

That is, in this case, as shown in FIG. 2, the connecting member 9 between the torque transmission member 8 and the support member 3 is reversed and rotated in the direction indicated by the arrow x2, and the distal end portion of the torque transmission member 8 is While the rear end portion of the support member 3 shifts upward, the rear end portion of the support member 3 shifts downward in the drawing, which is the direction opposite to the bolt tightening direction T. As shown in FIG.

At this time, the tightening force in the bolt tightening direction T is released by the reversal rotation of the connecting member 9, and is no longer transmitted to the socket mounting portion 4 (this state is also referred to as the “wrench head” bent neck state). The bolt B is tightened with the set tightening torque value.

In this state, when the handle 2 is rotated in the bolt tightening direction T to stop the tightening of the bolt B, the rear end of the support member 3 having the socket mounting portion 4 moves in the direction indicated by the arrow x2 in FIG. 1, the connecting member 9 is reversed and rotated in the direction indicated by the arrow x1, and the wrench 1 returns to its original state.

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

The ink tank 12 is filled with ink P that serves as a source of marking. For example, the tip of the ink tank 12 in the longitudinal direction is formed as an ink ejection port that is closed when not in use, but easily opens to eject ink P when a force compressing the ink tank 12 is applied. The ink discharge port of the ink tank 12 is closed by temporary adhesion during manufacture of the ink tank 12, for example, so that it can be easily opened by an increase in the internal pressure of the ink tank 12. FIG.

As the ink tank 12, a plurality of types of ink tanks 12 filled with inks P of different colors are prepared.

Further, inside the support member 3 of the socket mounting portion 4 , a thin tube is provided which communicates with the tip portion of the ink tank loading portion 11 in the longitudinal direction and extends linearly to the vicinity of the socket connecting portion 15 of the socket mounting portion 4 . A shaped ink lead-out path 13 is formed.

The vicinity of the socket connecting portion 15 of the socket mounting portion 4 to which the ink lead-out path 13 extends means, as shown in FIGS. At this position, the ink lead-out path 13 has an annular groove 14a corresponding to the peripheral edge of the socket 40 toward the surface of the socket mounting portion 4, and the socket mounting portion 4 has an annular groove 14a. It communicates with an ink outlet port (ink outlet path connecting portion) 14 which is formed to protrude in the same annular shape on the surface of the portion 4 . The communicating portion between the ink lead-out path 13 and the ink lead-out port (ink lead-out path connecting portion) 14 is tightly sealed so that the ink P does not leak. Not

The thick portion of the peripheral edge of the socket 40 is connected to an annular ink outlet (ink lead-out path connecting portion) 14 protruding from the surface of the socket mounting portion 4 while the socket 40 is mounted on the socket mounting portion 4 . A socket-side ink lead-out path 41 is formed.

The socket-side ink lead-out path 41 extends from the upper end to the lower end of the socket 40 in the thickness of the peripheral edge of the socket 40, and extends 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 B (or nut), the top wall or side wall of the washer fitting recess 42a corresponding to the surface or side surface of the washer W, and the surface of the tightening point R. A single ink lead-out groove 41b, 41c, 41d continuously formed to the lower end surface of the socket 40 is exposed.

The ink inlet of the socket-side ink lead-out path 41 exposed at the upper end of the socket 40 is opened between the socket mounting portion 4 on the wrench 1 side and the socket 40 as the bolt B (or nut) is tightened by the marking torque wrench 1. , so that the connection between the socket mounting portion 4 and the annular ink outlet port 14 is maintained in close contact even when a rotational difference occurs in the bolt fitting recess 42. It is formed as an ink introduction groove 41a.

The ink introduction groove 41a is formed as a funnel-shaped ink concentrating portion 41at (see FIGS. 4 and 5) in front of and behind the ink inlet serving as the narrow tube of the ink lead-out path 41 toward the ink inlet serving as the narrow tube. be.

With the bolt B (or nut) tightened by the marking torque wrench 1 and its socket 40, the ink lead-out path 13 on the wrench 1 side passes through the ink lead-out path 41 on the socket side to the ink lead-out grooves 41b, 41c, and 41d. When the ink P is discharged, the ink P is drawn from the side surface of the bolt B (or nut) with which the opening surfaces of the ink discharge grooves 41b, 41c, and 41d are in contact, the surface or side surface of the washer W, and the surface of the fastening point R. One check mark CM is added (marked) by .

As shown in FIGS. 1 and 2, at the rear end of the support member 3 having the socket mounting portion 4, on the side of the side that shifts upward in FIG. 1 (downward in FIG. 2) when the set torque is reached, A push-up projection 17 is provided.

In addition, on the side surface of the support member 3 where the push-up convex portion 17 is provided, a hole formed in communication with the side surface of the ink tank loading portion 11 in the short diameter direction is fitted into the hole and can move up and down like a piston. A switch member 16 is provided.

Between the head supporting portion 20a of the push-up convex portion 17 and the head supporting portion 20b of the switch member 16, a switch link pin 18 supporting the intermediate supporting portion 19 from the housing side of the handle 2 is suspended.

The ink switch mechanism including the push-up projection 17, the switch link pin 18, and the switch member 16 does not reach the set torque in the bolt tightening direction T, including the state where the bolt B (or nut) is not tightened by the wrench 1. At times, as shown in FIG. 1, the hemispherical tip of the switch member 16 does not protrude inward from the side surface of the ink tank loading section 11 and is configured to be in a position where the ink tank 12 is not compressed.

On the other hand, in the ink switch mechanism, when the bolt B (or nut) is tightened with the wrench 1 and the set torque is reached, as shown in FIG. As it shifts downward in the drawing, the tip of the switch member 16 protrudes inward from the side surface of the ink tank loading section 11 via the switch link pin 18 from the push-up projection 17, compressing the ink tank 12. configured to move to a position.

The tip of the switch member 16 is made of an elastic material such as rubber that does not damage the surface of the ink tank 12 and is formed in an arc shape.

In addition, the ink lead-out path 13 is connected to the ink lead-out path 13 by the ink tank loading unit 11 from above in FIG. A first ink shielding member 24 is provided for shielding the ink inlet while maintaining airtightness.

Between the upper support portion 23b of the first ink shield member 24 and the side support portion 23a of the switch member 16, the shield link pin 21 that supports the intermediate support portion 22 from the side surface of the support member 3 is suspended.

The first ink shielding mechanism including the switch member 16, the shielding link pin 21, and the first ink shielding member 24 can be used in the bolt tightening direction T, including the state where the bolt B (or nut) is not tightened by the wrench 1. When the set torque has not been reached, as shown in FIG. 1, the tip of the first ink blocking member 24 is configured to be at a position blocking the ink inlet of the ink lead-out path 13 .

On the other hand, the first ink shielding mechanism is interlocked with the switch member 16 of the ink switch mechanism as shown in FIG. The tip of the first ink shielding member 24 is configured to move from the switch member 16 via the shielding link pin 21 to a position where the ink inlet of the ink lead-out path 13 is opened without being shielded.

Further, in the ink lead-out path 13, immediately downstream of the ink inlet where the first ink shielding member 24 is provided, from the upper side in FIG. , a second ink shielding member 25 for shielding the ink lead-out path 13 is provided.

The second ink blocking member 25 descends in conjunction with depression of the ON/OFF button 26 provided at its upper end to block the ink lead-out path 13 . The second ink shielding mechanism including the second ink shielding member 25 and the ON/OFF button 26 consists of 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 an ON/OFF switch. It comprises a position holding member (not shown) that holds the button 26 at the depressed position against the spring force of the spring member 27 and releases the holding by pressing it again.

The tips of the first ink shielding member 24 and the second ink shielding member 25 are made of an elastic material such as rubber, and are kept airtight both when the ink lead-out path 13 is shielded and when it is opened. configured to be

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 housing of the handle 2 and the socket attachment part 4 The portion exposed to the outside from the support member 3 is covered with a cover member 28 engaged with the tip side of the handle 2 except for the head portion of the ON/OFF button 26 .

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 .

The ink tank replacement window 31 is closed by an ink lid 29 made of flat rubber, for example, so that it can be freely opened and closed. A handle 30 is provided on the surface of the ink lid 29 for opening and closing the ink lid 29 by, for example, hooking a finger of the user.

Next, the operation of the marking torque wrench 1 of the embodiment and its socket 40 accompanying tightening of the bolt B (or nut) will be described.

FIG. 5 is a flow chart showing a work procedure including marking accompanying tightening of the bolt B (or nut) using the marking torque wrench 1 and its socket 40. As shown in FIG.

First, in preparation for the work, the user prepares an ink tank 12 of a desired color as the color of the check mark CM, opens the ink lid 29 on the side of the handle 2, and inserts the prepared ink tank 12 into the ink tank replacement window 31. is loaded into the ink tank loading section 11 via the .

Next, the socket 40 is attached to the socket attachment portion 4 . At this time, the annular ink inlet (ink introduction groove 41 a ) of the socket-side ink lead-out path 41 exposed at the upper end of the socket 40 protrudes from the surface of the socket mounting portion 4 . (Ink lead-out path connecting portion) 14, and the wrench coupling concave portion 43 of the socket 40 is fitted into the socket coupling portion 15 of the socket mounting portion 4 (step S1).

At this time, the annular ink inlet (ink introduction groove 41a) of the socket-side ink lead-out path 41 is in close contact with the annular ink lead-out port (ink lead-out path connecting portion) 14 protruding from the surface of the socket mounting portion 4, Even if a rotational difference occurs between the socket mounting part 4 and the socket 40, they are connected in a state that the ink P does not leak.

The user operates the torque adjuster 5 to set the tightening torque of the bolt B (or nut) to a specified torque value (step S2).

The user operates the ON/OFF button 26 to raise the second ink blocking member 25 to unblock the ink lead-out path 13, thereby enabling ejection of the ink P through the ink lead-out path 13. Set (step S3).

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

At this time, as shown in FIG. 1, the front end portion of the torque transmission member 8 and the rear end portion of the support member 3 are moved by the spring force of the torque generating spring 7 so that the connecting member 9 moves in the direction indicated by the arrow x1, that is, torque transmission. The tip of the member 8 is urged upward in the figure, and the rear end of the support member 3 is urged downward in the figure. The head support portion 20b of the member 16 is biased in the direction indicated by the arrow b1, and the first ink shielding member 24 is biased in the direction indicated by the arrow c1 via the switch link pin 18 and the shield link pin 21, respectively. .

Therefore, when 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 lead-out path 13 is blocked by the first ink blocking member 24. The state is maintained, and the ink P is not ejected from the ink tank 12 .

After that, when the tightening torque of the bolt B reaches the set tightening torque, the rear end portion of the support member 3 of the socket mounting portion 4 is released from the torque generating spring 7 through the torque transmission member 8 and the connecting member 9 shown in FIG. It moves upward in the figure against the downward biasing force.

Then, as shown in FIG. 2, the connecting member 9 between the torque transmission member 8 and the support member 3 is reversed and rotated in the direction indicated by the arrow x2, and the rear end portion of the support member 3 is displaced downward in the drawing. As it moves, the head support portion 20a of the push-up projection 17 moves in the direction indicated by arrow a2, the head support portion 20b of the switch member 16 moves in the direction indicated by arrow b2, and the first ink blocking member 24 moves in the direction indicated by arrow c2. 2 move together via the switch link pin 18 and the shield link pin 21, respectively.

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 lead-out path 13 is opened, and the ink P in the ink tank 12 is is ejected from the ink ejection port of the ink tank 12 .

Then, the ink P flows from the ink lead-out path 13 through the ink lead-out port (ink lead-out path connecting portion) 14 of the socket mounting portion 4 and the socket-side ink lead-out path 41 shown in FIGS. from the side surface of the washer W to the surface or the side surface of the washer W and further to the surface of the tightening portion R, and flow into the single ink lead-out grooves 41b, 41c, and 41d whose openings are in contact with each other.

As a result, one check mark CM is added (marked) from the side surface of the bolt B (or nut) to the surface or side surface of the washer W and the surface of the tightening portion R.

At this time, the tightening force 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, so that the rear end portion of the support member 3 having the socket mounting portion 4 is aligned with the arrow in FIG. Since the force that tends to shift in the direction x2 disappears, the connecting member 9 rotates again in the direction indicated by the arrow x1 as shown in FIG. 1, and the wrench 1 returns to its original state. back to

Accordingly, the movement of compressing the ink tank 12 is released by the switch member 16, and the first ink shielding member 24 again shields the ink inlet of the ink lead-out path 13, and the ejection of the ink P is stopped.

The user removes the wrench 1 and its socket 40 from the tightened bolt B (step S5), and hangs it from the side surface of the bolt B (or nut) to the surface or side surface of the washer W and further to the surface of the tightening point R. Check the marked check mark CM (step S6).

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

As described above, according to the marking torque wrench 1 and its socket 40 of the embodiment, it is possible to easily confirm that there is no loosening of the bolt B (or nut) without changing the grip of the tool or causing variations in construction quality. Mark CM can be attached.

In addition, in the marking torque wrench 1 of the embodiment, the ink switch mechanism including the ink tank loading portion 11, the ink lead-out path 13, the push-up convex portion 17, the switch link pin 18, the switch member 16, the switch member 16, the shielding The first ink shielding mechanism including the 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 both supported by the support member of the socket mounting portion 4. 3, the space inside the handle 2 and the space inside the cover member 28 may be utilized.

In this case, for example, a flexible tube is used as the ink lead-out path 13 connected to the ink ejection port of the ink tank 12, and the ink lead-out path 13 of the flexible tube is connected to the ink lead-out port of the socket mounting portion 4 (ink lead-out path connecting portion). 14 to configure.

A plurality of types of sockets 40 are of course prepared according to the diameter of the bolt B (or nut). Of course, the annular ink inlet (ink introduction groove 41a) of the lead-out path 41 is shared.

While several embodiments of the invention have been described, these embodiments have been presented by way of example and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and modifications can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the scope of the invention described in the claims and equivalents thereof.

REFERENCE SIGNS LIST 1 Marking torque wrench 2 Handle 3 Supporting member for socket mounting portion 4 Socket mounting portion 5 Torque adjusting portion 6 Torque adjusting mechanism 7 Torque generating spring 8 Torque transmitting member 9 Connection member 11 Ink tank loading unit 12 Ink tank 13 Ink lead-out path 14 Ink outlet (ink lead-out path connection part) 15 Socket coupling part 16 Switch member 24 First Ink shielding member 25 Second ink shielding member 26 ON/OFF button 28 Cover member 29 Ink lid 31 Ink tank replacement window 40 Socket 41 Socket side ink lead-out path 41a Ink introduction groove 41at... Ink gathering portion 41b to 41d... Ink lead-out groove 42... Bolt fitting recess 42a... Washer fitting recess 43... Wrench coupling recess B... Bolt (or nut) W... Washer R... Tightening point, P... Ink, CM... Check mark.

Claims (8)

a handle that is gripped by a user and rotated as the bolt or nut is tightened;
an elastic bag-shaped ink tank loaded inside the handle and filled with ink;
an ink switch mechanism that compresses the ink tank in conjunction with the movement of members in the handle when the tightening torque of the bolt or nut reaches a preset tightening torque due to the rotating operation of the handle;
an ink lead-out path for leading the ink ejected from the ink tank in response to the compression of the ink tank by the ink switch mechanism to the surface of the socket mounting part on which the socket is mounted;
The ink drawn out through the ink lead-out path of the socket mounting portion is transferred from the surface of one end of the socket mounted on the socket mounting portion facing the socket mounting portion to the other end of the side where the bolt or nut is fitted. Socket-side ink having an ink lead-out groove whose opening contacts the surface of the bolt or nut to be fitted, the surface or side surface of the washer tightened together with the bolt or nut, and the surface of the tightening part of the bolt. a lead-out path;
marking torque wrench and its socket. In a state where the tightening torque of the bolt or nut does not reach a preset tightening torque, the space between the ink discharge port of the ink tank and the ink inlet of the ink lead-out path is shielded, and the bolt is rotated by rotating the handle. or when the tightening torque of the nut reaches a preset tightening torque, the first ink shielding mechanism opens the shielding in conjunction with the movement of the member in the handle,
The marking torque wrench and its socket according to claim 1. The ink tank is loaded into an ink tank loading section provided as a recess having a shape corresponding to the ink tank in a member inside the handle,
The ink inlet of the ink lead-out path is formed in communication with one end portion of the ink tank loading section where the ink discharge port of the ink tank is located,
The ink switch mechanism rotates the side surface of the ink tank loading section in conjunction with the movement of members in the handle when the tightening torque of the bolt or nut reaches a preset tightening torque due to the turning operation of the handle. an ink switch that protrudes inward from and compresses the ink tank;
A marking torque wrench and its socket according to claim 1 or 2. The ink lead-out path is formed in communication with an ink lead-out port protruding from a surface of the socket mounting portion on which the socket is mounted,
The ink outlet is connected to the ink inlet of the socket-side ink lead-out path on the surface of one end of the socket mounted on the socket mounting section, which faces the socket mounting section.
A marking torque wrench and its socket according to any one of claims 1 to 3. An ink tank replacement window is formed in the side of the handle and is used to replace the ink tank loaded inside the handle,
A marking torque wrench and its socket according to any one of claims 1 to 4. A second ink shielding mechanism that shields or opens the ink lead-out path according to a user operation,
A marking torque wrench and its socket according to any one of claims 1 to 5. a handle that is gripped by a user and rotated as the bolt or nut is tightened;
an elastic bag-shaped ink tank loaded inside the handle and filled with ink;
an ink switch mechanism that compresses the ink tank in conjunction with the movement of members in the handle when the tightening torque of the bolt or nut reaches a preset tightening torque due to the rotating operation of the handle;
an ink lead-out path for leading 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 part on the side where the socket is mounted;
The socket receives the ink drawn out through the ink lead-out path of the socket mounting part from the face of one end of the socket mounted on the socket mounting part, which faces the socket mounting part, and is fitted with the bolt or nut. An ink lead-out groove is drawn out to the surface of the other end, and the opening is in contact with the surface or side surface of the washer tightened together with the bolt or nut from the side surface of the bolt or nut to be fitted, and further to the surface of the tightening part of the bolt. marking torque wrench with a socket side ink lead-out path. a handle that is gripped by a user and rotated as the bolt or nut is tightened;
an elastic bag-shaped ink tank loaded inside the handle and filled with ink;
an ink switch mechanism that compresses the ink tank in conjunction with the movement of members in the handle when the tightening torque of the bolt or nut reaches a preset tightening torque due to the rotating operation of the handle;
a socket for a marking torque wrench, comprising: an ink lead-out path for leading 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 part on a side where the socket is mounted. and
The ink drawn out through the ink lead-out path of the socket mounting part of the marking torque wrench is applied to the bolt or nut from the face of the socket mounted on the socket mounting part, which faces the socket mounting part. An ink lead-out groove is drawn out to the surface of the other end, and the opening is in contact with the surface or side surface of the washer tightened together with the bolt or nut from the side surface of the bolt or nut to be fitted, and further to the surface of the tightening part of the bolt. a socket with a socket-side ink lead-out path.

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