JP2009148857A - Spanner type torque wrench with marking function - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a spanner type torque wrench capable of marking while avoiding an interference with members in the periphery of a bolt and nut. <P>SOLUTION: This spanner type torque wrench with the marking function has a toggle mechanism 4 actuated when a fastening force to the bolt and nut 100 reaches a predetermined value and automatically putting a mark thereon by a stamp. This torque wrench is provided with: a stamp body (an ink cartridge 6 and a stamp pushing rod 5) disposed to move forward/rearward along the longitudinal direction of the torque wrench body 2 and having the stamp part 6a at its tip; a starting part (a lateral link 13 and the like) displaced by being operatively connected with the displacement of the toggle mechanism 4 due to its operation; and a transmission part (a starting magnet 17 and a stamp pushing magnet 9) converting the displacement of the starting part into the movement in the longitudinal forward direction to advance the stamp body. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a spanner type torque wrench with a marking function in which a toggle mechanism operates when a tightening force to a bolt or nut reaches a predetermined value, and marking is automatically performed by a stamp.

  In the spanner type torque wrench used for tightening bolts and nuts, when the tightening force reaches a predetermined value, the toggle mechanism operates to keep the tightening force constant so that the tightening force does not become excessive or insufficient. The preset type is known. By properly using the spanner type torque wrench, a nut tightening operation with a constant tightening force can be performed.

On the other hand, there are many cases in which bolt and nut tightening completion markings are implemented as a measure for preventing forgetting nut tightening in an assembly process in a production line or the like. For this reason, recently, a torque wrench with a marking function (see, for example, Patent Document 1) capable of automatically performing marking when bolts and nuts are completely tightened has been proposed and is commercially available from torque wrench manufacturers.
As shown in FIG. 9, the torque wrench mechanism with the marking function has a displacement of swinging of the ratchet portion 52 and the handle portion 53 due to the operation of the toggle mechanism 51 provided in the torque wrench body 50 when the bolt tightening torque is reached. The marking stamp is moved by moving the marking stamp in the vertical direction via the mechanical link mechanism 54. The link mechanism portion is provided on the upper portion of the torque wrench main body 50, and the marking stamp is stored in the extension 55.

  However, since there are many obstacles in the length direction of the fastening body in the process using the spanner head, it is often impossible to equip the upper part with a large structure or to equip the lower part with an extension. It is difficult to divert the marking mechanism to a spanner type torque wrench.

Among the spanner type torque wrenches, one that automatically performs marking has been proposed (see, for example, Patent Documents 2 and 3).
In these spanner type torque wrenches, the movable body arranged on the spanner body is rotated by the displacement of the swinging motion linked to the operation of the toggle mechanism, and the stamp provided at the tip of the movable body is moved from the side of the nut to the nut or The stamp is made by contacting a bolt with a nut tightened.
Japanese Patent No. 3477221 No. 7-11893 Utility Model Registration No. 2503817

  However, with the conventional spanner type torque wrench with marking function, marking is performed by moving the stamp to the bolt or nut from the side, so that there is not enough space around the bolt or nut. There is a possibility that the fastening operation may be difficult due to interference with the member, or the stamping operation may not be performed smoothly. Further, in the mechanism from the swing operation to the rotation of the movable body and the stamp operation, the movable amount of the stamp is large, and there is a possibility that the movement is not smoothly performed.

  The present invention has been made against the background of the above circumstances, and a basic object of the present invention is to provide a spanner type torque wrench with a marking function that can smoothly perform a stamping operation even if a space around a bolt or a nut is small. More preferably, it is an object of the present invention to provide a spanner type torque wrench with a marking function in which a stamping operation is performed reliably and smoothly.

That is, among the spanner type torque wrenches with marking function according to the present invention, the first aspect of the present invention is that the toggle mechanism operates when the tightening force on the bolt or nut reaches a predetermined value, and the stamp mechanism automatically In the spanner type torque wrench with marking function to mark,
A stamp body that is arranged to be capable of moving back and forth along the longitudinal direction of the torque wrench body, has a stamp portion at the tip, an activation portion that is displaced in conjunction with the displacement associated with the operation of the toggle mechanism, and a displacement of the activation portion. It has a transmission part which changes into the movement to the front of the longitudinal direction, and advances the stamp main part.

  The spanner type torque wrench with a marking function according to the second aspect of the present invention is characterized in that, in the first aspect of the present invention, the transmission section has a non-connected structure.

  A spanner type torque wrench with a marking function according to a third aspect of the present invention is the first or second aspect of the present invention, wherein the transmission portion is provided on the starter magnet provided on the starter side and on the stamp body side. The stamp magnet includes a stamp pressing magnet that moves the stamp main body forward by the magnetic force acting on each other when the activation magnet is moved by the activation unit.

  The spanner type torque wrench with marking function according to a fourth aspect of the present invention is the spanner type torque wrench according to any one of the first to third aspects of the present invention, wherein the starter rotates or moves in conjunction with the displacement associated with the operation of the toggle mechanism. It moves in a direction that intersects the direction.

  A spanner type torque wrench with a marking function according to a fifth aspect of the present invention is the spanner type torque wrench according to any one of the first to fourth aspects of the present invention, wherein the transmitting portion is a cam provided on one side of the starting portion and the stamp body. And a cam follower provided on the other side.

  The spanner type torque wrench with a marking function according to a sixth aspect of the present invention is the spanner type torque wrench according to any one of the first to fifth aspects of the present invention, wherein the transmitting portion is a cam provided on one side of the starting portion and the stamp body. And a cam follower provided on the other side.

  According to the present invention, the displacement (sliding movement, rotational movement, etc.) of the starting part interlocked with the displacement accompanying the operation of the toggle mechanism is converted into the forward direction along the longitudinal direction of the torque wrench body by the transmission part. Due to the driving force, the stamp body moves smoothly along the longitudinal direction of the torque wrench body regardless of the size of the space around the bolt or nut. Along with this movement, the stamp portion provided at the tip of the stamp body is pressed against a nut, a bolt or the like for marking. The stamp main body may be returned to the initial position before the stamp by the movement of the activation part accompanying the opening of the toggle operation, and means for returning the stamp main body to the initial position (push-back means using urging force, etc.) May be provided.

Further, if the transmission part has a non-connected structure, the driving force can be smoothly transmitted between the displacement of the starting part and the movement of the stamp body.
For example, in the transmission unit, the activation magnet provided on the activation unit side and the stamp body are provided on the stamp body side, and the activation magnet moves by the activation unit so that mutual magnetic forces act on each other and the stamp body. If it has a stamp pressing magnet that moves forward, it is possible to reduce the mechanical contact portion and avoid failure due to wear or the like. In addition, since a large stamp displacement can be obtained by the magnet repulsion regardless of the displacement of the moving parts, the components can be simplified and miniaturized, and a strong stamp pressing force can be achieved by the magnet repulsion regardless of the movement of the moving parts. Therefore, the components can be simplified and downsized.

  In addition, if the transmission unit includes a cam provided on one side of the starter and the stamp body and a cam follower provided on the other side, the transmission unit can be driven without requiring a complicated link mechanism. Force can be transmitted, and a smooth stamping operation is always performed. In addition, the components can be simplified and downsized.

  Further, the transmission unit is composed of a rotating body that rotates in conjunction with the displacement accompanying the operation of the toggle mechanism and a roller follower that is provided on the rotating body and contacts the stamp body, thereby transmitting the driving force with a simple structure. Thus, a smooth stamp operation can be performed.

  As described above, according to the spanner type torque wrench with a marking function of the present invention, the toggle mechanism operates when the tightening force on the bolt or nut reaches a predetermined value, and the marking is automatically performed by the stamp. In a spanner type torque wrench with a marking function, the stamp wrench is disposed so as to be capable of moving back and forth along the longitudinal direction of the torque wrench body, and has a stamp body having a stamp portion at the tip thereof, and activation that moves in conjunction with the displacement associated with the operation of the toggle mechanism And a transmission unit that converts the displacement of the activation unit into the movement in the longitudinal direction forward to advance the stamp body, and therefore moves in the longitudinal direction of the torque wrench body using the operation displacement of the toggle mechanism. Marking can be performed using a space that does not easily interfere with the periphery of the stamp body. , Effects such as improving the workability can be obtained.

(Embodiment 1)
Hereinafter, an embodiment of the present invention will be described.
FIG. 1 is a partial cross-sectional view showing the entire spanner type torque wrench 1 with a marking function, and a head member 3 is rotatably attached to a distal end side of a cylindrical torque wrench main body 2. The head member 3 has a spanner portion 3 a at the tip, and the other end extends into the torque wrench body 2 and is connected to one side of a toggle mechanism 4 provided in the torque wrench body 2. The other side of the toggle mechanism 4 is connected to the torque wrench body 2 side.
When the specified torque is tightened, the toggle mechanism 4 releases the fixed state between the torque wrench main body 2 and the head member 3 by the toggle operation, and the head member 3 does not follow the tightening force applied to the torque wrench main body 2, and the head The member 3 side swings at a predetermined angle. At this time, a part of the head member 3 hits the torque wrench main body 2 and makes a sound so that the operator can know that the specified torque has been tightened. In addition, the structure of the toggle mechanism 4 is not limited to a specific thing as this invention, A well-known thing can be used.

  As shown in FIG. 2, a lateral link 10 extending outward from one side and projecting from the torque wrench body 2 is connected and fixed to the end of the head member 3 on the toggle mechanism 4 side. One end of the link 11 is rotatably supported. The vertical link 11 is pivotally fixed to the link main body 2 at a link fulcrum 12 on the side close to the horizontal link 10, and is linked to the other end side of the vertical link 11 so as to cross the longitudinal direction of the link main body 2. A lateral link 13 positioned on the main body 2 is rotatably supported. The lateral link 13 is slidably held by a bush 14 provided on the link main body 2, and the end side is located at a distance from the support plate 16 provided at one end on the link main body 2. ing. A link return spring 15 is disposed between the end of the lateral link 13 and the support plate 16 so as to be contractible.

  In the above structure, when the head member 3 swings, the toggle mechanism 4 side end of the head member 3 moves relatively outward with respect to the torque wrench body 2 as shown in FIG. The vertical link 11 is rotated by the horizontal link 10 connected thereto so that the horizontal link 10 side moves outward with the link fulcrum 12 as the center, and the other end side of the vertical link 11 moves inward. While the horizontal link 13 is held by the bush 14 by the rotation of the vertical link 11, it slides inward against the elastic force of the link return spring 15. At this time, when the horizontal link 10 moves the distance L1, the displacement is amplified according to the ratio of the rotation radii L2 and L3 to the link fulcrum 12 at both ends of the vertical link 11 (lever ratio L2: L3), and the horizontal link 13 is L4 (L4>). L1) is moved.

  When the toggle mechanism 4 is opened, the end of the head member 3 on the toggle mechanism 4 side moves inward relative to the torque body 2 so as to return to the initial position, and the lateral link 10 is moved accordingly. Move inward. Along with this movement, the vertical link 11 rotates and the horizontal link 13 is slid outward. At this time, the elastic force of the link return spring 15 acts, and the horizontal link 13 is slid smoothly. That is, the said horizontal link 10, the vertical link 11, and the horizontal link 13 are corresponded to the starting part of this invention displaced in conjunction with the displacement accompanying the operation | movement of a toggle mechanism. Note that an activation magnet 17 constituting a part of the transmission unit of the present invention is attached to the front surface of the horizontal link 13 on the front end side and slightly inside so that the magnetized surface is positioned on the front side. .

  An ink cartridge 6 is disposed on the outer surface side of the torque wrench main body 2 along the longitudinal direction of the torque wrench main body 2 on the front side of the starting portion, and is held by the stamp holder 7 so as to be movable in the front-rear direction. ing. A marking pressing rod 5 is attached to the rear side of the ink cartridge 6, and a busher 5 a is fitted into the rear end of the marking pressing rod 5. Further, a stamp portion 6a to which ink is supplied from the ink cartridge 6 is provided in front of the ink cartridge 6, and protrudes from the tip of the stamp holder 7 and extends to the vicinity of the spanner portion 3a. Further, a roller 7a provided on the stamp holder 7 is in rolling contact with the stamp portion 6a.

  In the state where the ink cartridge 6 is in the initial position where no marking is performed, the shoulder on the rear side of the ink cartridge 6 abuts against the inner surface on the rear side of the stamp holder 7 and further rearward movement is restricted. Further, a retractable stamp push-back spring 8 is disposed between the front shoulder portion of the ink cartridge 6 and the front inner surface of the stamp holder 7 so that the ink cartridge 6 is in the initial position. It is fast. The above-described busher 5a, marking pressing rod 5, ink cartridge 6, stamp portion 6a, and stamp holder 7 constitute a stamp body of the present invention.

  A stamp pressing magnet 9 having a rear surface as a magnetized surface is attached to the rear end side of the busher 5a. The opposed surfaces of the stamp pressing magnet 9 and the activation magnet 17 are magnetized to the same polarity, and when the toggle mechanism 4 is opened, the activation magnet 17 and the activation magnet 17 are arranged in accordance with the position of the lateral link 13. The positions in the axial direction are shifted so that the mutual magnetic force does not act, the toggle mechanism 4 operates, and the mutual positions are set so as to face each other in a state where the lateral link 13 slides inward. . The starting magnet 17 and the stamp pressing magnet 9 constitute the transmission unit of the present invention.

Next, the operation of the spanner type torque wrench 1 with the marking function will be described.
A torque for tightening is preset in a spanner type torque wrench 1 with a marking function, and a nut 100 for tightening is fitted into the spanner portion 3a. In this embodiment, it is assumed that the nut 100 is a flare nut and the pipe 101 connected to the nut 100 is stamped.

Since the toggle mechanism 4 is opened at the initial stage, the end of the head member 3 on the side of the toggle mechanism 4 is positioned relatively inside the torque wrench body 2 as shown in FIG. is doing. As a result, the lateral link 13 is displaced outward with respect to the torque wrench main body 2 as an initial position, and the starting magnet 17 is displaced in the axial direction from the stamp pressing magnet 9 and substantially acts as a magnetic force. Not in a position.
Further, the ink cartridge 6 is urged rearward by the stamp push-back spring 8 and is in the initial position, and the tip of the stamp portion 6a is located slightly behind the pipe 101 as shown in FIG.

  When the nut 100 is tightened through the torque wrench main body 2 in the above state, the nut 100 is rotated by the spanner portion 3a until a preset torque is reached. When the tightening force reaches a preset torque, the toggle mechanism 4 operates and the head member 3 swings with respect to the torque wrench body 2. As the head swings, the end of the head member 3 on the side of the toggle mechanism 4 moves outward relative to the torque wrench body 2, and the horizontal link 10, the vertical link 11, and the horizontal link 13 slide as described above. Alternatively, the rotational movement is performed, the displacement amount is amplified as described above, and the starting magnet 17 attached to the horizontal link 13 slides and finally faces the stamp pressing magnet 9 as shown in FIG. Since both magnets have the same magnetic pole as described above, a repulsive force is generated when they approach each other. Since the starting magnet 17 is supported by the lateral link 13, the position in the front-rear direction is maintained. On the other hand, the stamp pressing magnet 9 moves forward away from the starting magnet 17.

  As the stamp pressing magnet 9 moves, the stamp pressing rod 5 moves forward via the busher 5 a to advance the ink cartridge 6 against the elastic force of the stamp pushing back spring 8. As the ink cartridge 6 advances, the stamp portion 6a at the tip of the ink cartridge 6 hits the pipe 101, and marking is performed on the pipe 101.

  When the tightening via the torque wrench body 2 is stopped, the toggle mechanism 4 is opened and the head member 3 swings back. As a result, the end of the head member 3 on the toggle mechanism 4 side returns to the initial position with respect to the torque wrench main body 2 and starts using the elastic force of the link return spring 15 via the horizontal link 10, the vertical link 11, and the horizontal link 13. The magnet 17 moves to a position away from the position facing the stamp pressing magnet 9. As a result, the magnetic force acting between the magnets disappears, and the repulsive force that moves the stamp pressing magnet 9 is lost. Then, the pressing force applied to the ink cartridge 6 via the busher 5a and the stamp pressing rod 5 is lost, and the ink cartridge 6 is pushed back by the elastic force of the stamp pushing back spring 8 to return to the initial position. By the above operation, a large stroke can be given to the marking mechanism by using a small displacement of the swing motion without requiring a special mechanism.

  In the first embodiment, when it is desired to adjust the position of the stamp portion 6a, the stroke amount can be adjusted by changing the length of the stamp body by adjusting the amount of insertion of the bushing 5a of the marking pressing rod 5. it can. Further, when the ink in the ink cartridge is used up and replenishment is required, the ink cartridge 6 is removed from the stamp body 2 by removably using a part of the holder 7 with a cap or the like to replenish the ink. Or the ink cartridge can be replaced.

(Embodiment 2)
In Embodiment 1 described above, the activation magnet 17 has been described as being moved on the same plane as the surface on which the stamp body moves. However, the activation magnet is moved on a plane that intersects the plane on which the stamp body moves. Also good. The said structure is demonstrated based on FIG. In addition, the same code | symbol is attached | subjected about the structure similar to the said embodiment, and the description is abbreviate | omitted or simplified.

  In this embodiment, a drive pin 20 that protrudes through the long hole 2 a on the torque wrench main body 2 is fixed to the end of the head member 3 on the toggle mechanism 4 side. On the outside of the drive pin 20, a link arc 21 having a shape bent at approximately 90 degrees is fixed to the torque wrench body 2 by a pivot 22 having an axial center along the longitudinal direction of the torque wrench body 2. The link arm 21 includes a vertical piece 21 a positioned along the vertical direction on the outer side of the drive pin 20 and a horizontal piece 21 b positioned along the horizontal direction on the upper side of the drive pin 20 in the drawing. A pivot spring (not shown) is attached to the pivot 22 to give a biasing force that rotates the link arm 21 around the pivot 22 in the clockwise direction in the figure. An abutting portion 21c is provided inside the vertical piece 21a of the link arm 21. When the toggle mechanism 4 is not operating, the abutting portion 21c of the link arm 21 urged by the winding spring is provided. The rotation is restricted by contacting the drive pin 20. In this state, the horizontal piece 21b of the link arm 21 is positioned along the oblique horizontal direction.

When the toggle mechanism 4 is operated, the head member 3 swings with respect to the torque wrench main body 2, so that the end of the head member 3 on the toggle mechanism 4 side is relatively outward with respect to the torque wrench main body 2. Moving. Along with this movement, the drive pin 20 is also moved outward, and the vertical piece 21a of the link arm 21 is rotated outward via the contact portion 21c. By this rotation, the horizontal piece 21b rotates to a substantially horizontal state. In the above displacement, when the drive pin 20 moves by the distance L10, the lever 20 is displaced by rotation around the pivot 22 by the lever ratio (L11: L12) based on the rotation radius L11 of the vertical piece 21a and the rotation radius L12 of the horizontal piece 21b. The amount is amplified and the tip of the horizontal piece 21b rotates.
The drive pin 20 and the link arm 21 constitute an activation unit of the present invention. The starting magnet 17 having the front side as a magnetized surface is attached to the front surface of the tip of the horizontal piece 21b.

  On the front side of the rotation surface of the horizontal piece 21b, a stamp body comprising a busher 5a, a marking pressing rod 5, an ink cartridge 6, a stamp portion 6a, and a stamp holder 7 is provided on the torque wrench body 2 in the same manner as in the above embodiment. It arrange | positions so that it can advance back and forth along a longitudinal direction. When the horizontal piece 21b of the link arm 21 moves to a substantially horizontal state by the operation of the toggle mechanism 4, the activation magnet 17 faces the stamp pressing magnet 9 provided on the marking pressing rod 5 as shown in FIG. On the other hand, when the toggle mechanism 4 is opened and the link arm 21 is rotated and the horizontal piece 21b is in the oblique horizontal position, the distance between the starting magnet 17 and the stamp pressing magnet 9 is increased, and the mutual magnetic force acts substantially. It will be in a state that does not.

  Also in this embodiment, according to the operation of the toggle mechanism 4, the drive pin 20 and the link arm 21 are moved with the displacement amount amplified, and the starting magnet 17 is applied to the stamp pressing magnet 9 as shown in FIG. On the other hand, the stamp body moves forward by the repelling magnetic force, and the stamp portion 6a at the front end marks the pipe 101. When the toggle mechanism 4 is released, the drive pin 20 moves and the link arm 21 is urged by the winding spring and rotated until it is regulated by the drive pin 20, and the repulsive force against the stamp pressing magnet 9 disappears. As a result, the stamp body is pushed back to the initial position by the stamp push-back spring 8, and the stamp portion 6 a moves to a position away from the pipe 101.

(Embodiment 3)
In each of the above-described embodiments, description has been given of the transmission unit that uses the action of magnetic force, but it is also possible to perform the stamping operation by changing the moving direction of the activation unit without using the magnetic force. Hereinafter, this embodiment will be described with reference to FIG. In addition, the same code | symbol is attached | subjected about the structure similar to the said embodiment, and the description is abbreviate | omitted or simplified.

  In this embodiment, as in the first embodiment, as shown in FIG. 7, the lateral link 10 is attached to the end of the head member 3 on the toggle mechanism 4 side, and the link fulcrum 12 is attached to the end of the lateral link 10. One end of the vertical link 11 that is fixed to the shaft is fixed, and one end of the horizontal link 13 is fixed to the other end of the vertical link 11. The lateral link 13 is axially fixed by a bush 14 so as to be slidable. In this embodiment, a cam 13 a having an inclination angle θ that protrudes forward in the longitudinal direction of the link body 2 toward the inner side of the end portion is formed on the front side of the end portion of the horizontal link 13. A roller cam follower 5b that contacts the cam 13a is provided at the rear end of the stamp pressing rod 5 of the stamp body. The cam 13a and the roller cam follower 5b constitute a transmission portion of the present invention, and the transmission portion has a non-connected structure.

  In the embodiment with the above configuration, when the toggle mechanism 4 is opened at the initial stage, the end of the head member 3 on the toggle mechanism 4 side is positioned relatively inside the torque wrench body 2. As a result, the lateral link 13 is displaced outward with respect to the torque wrench body 2 as an initial position, the roller cam follower 5b is not pushed forward by the cam 13a, and the ink cartridge 6 It is biased rearward by the push-back spring 8 and is in the initial position.

  When the nut 100 is tightened via the torque wrench body 2 and the tightening force reaches a preset torque, the toggle mechanism 4 operates and the head member 3 swings relative to the torque wrench body 2. With this swinging motion, the horizontal link 10 and the vertical link 11 slide or rotate as described above, and the horizontal link 13 slides by amplifying the displacement amount from L1 to L4 according to the lever ratio (L2: L3). Moving. Along with this movement, the cam 13a formed on the lateral link 13 slides and moves toward the roller cam follower 5b. The inclined cam shape pushes the roller cam follower 5b forward, and accordingly, the stamp pressing rod 5 and the ink cartridge 6 Advances against the elastic force of the stamp push-back spring 8. As the ink cartridge 6 moves forward, the stamp portion 6a at the leading end marks the pipe 101.

  When the tightening via the torque wrench body 2 is stopped, the toggle mechanism 4 is released and the head member 3 swings back to its original position, and the elasticity of the link return spring 15 is obtained via the horizontal link 10, the vertical link 11, and the horizontal link 13. Using the force, the cam 13a moves sideways away from the roller cam follower 5b. As a result, the forward drive force for the roller cam follower 5b is lost. The ink cartridge 6 is pushed back by the elastic force of the stamp push-back spring 8 and returns to the initial position.

(Embodiment 4)
Furthermore, other embodiments will be described.
In this embodiment, an extension plate 30 that extends rearward on the upper surface side of the torque wrench main body 2 without being connected to the torque wrench main body 2 is fixed to the head member 3. A stamp main body including the busher 5a, the stamp pressing rod 5, the ink cartridge 6, the stamp portion 6a, and the stamp holder 7 shown in the embodiment is disposed. Further, the torque wrench body 2 is provided with a drive pin 31 that protrudes through the elongated hole 30 a above the extension plate 30 immediately after the toggle mechanism 4.

  A link arm 33 is pivotally fixed to the extension plate 30 by a pivot 34 along the surface direction of the extension plate 30 in front of the elongated hole 30a. The rear side of the link arm 33 is It is located so as to contact the inside of the drive pin 31. Therefore, when the drive pin 31 moves inward, the link arm 33 is driven to rotate about the pivot 34.

  On the front side of the link arm 33, a roller follower 35 that abuts against the busher 5a of the stamp body is provided. Accordingly, when the link arm 33 is pushed by the drive pin 31 and rotates around the pivot 34, the stamp pressing rod 5 is pushed forward by the roller follower 35. That is, the link arm 33 including the roller follower 35 corresponds to a transmission unit of the present invention, and the drive pin 31 corresponds to an activation unit of the present invention.

  In this embodiment, when the toggle mechanism 4 operates, the head member 3 swings, the torque wrench body 2 rotates relative to the extension plate 30 fixed to the head member 3, and the drive pin 31 moves inward relative to the extension plate 30. As the drive pin 31 moves, the link arm 33 rotates, and the roller follower 35 on the front side of the link arm 33 moves forward with rotation. At this time, when the drive pin 31 moves a distance of L20, the displacement is amplified according to the lever ratio (L21: L22) based on the rotation radii L21 and L22 of the rear part and the front part of the link arm.

  As the roller follower 35 advances, the stamp pressing rod 5 is pushed forward by the amplified displacement L23, and the ink cartridge 6 and the stamp portion 6a move forward against the urging force of the stamp pushing back spring 8 to perform marking. When the toggle mechanism 4 is released, the drive pin 31 returns to the initial position, and the pressure on the link arm 33 is released. As a result, the stamp portion 6a, the ink cartridge 6, the stamp pressing rod 5, and the busher 5a are pushed back by the stamp push-back spring 8, and the link arm 33 is rotated until it is regulated by the drive pin 31 to return to the initial position. To do.

  As described above, the present invention has been described based on the above embodiment, but the present invention is not limited to the contents of each of the above embodiments, and can be appropriately changed without departing from the present invention. It is.

It is the top view which shows the spanner type torque wrench with a marking function of one Embodiment of this invention, and a partial enlarged front view. Similarly, it is a cross-sectional side view of a spanner type torque wrench with a marking function. Similarly, it is the top view which shows operation | movement of the spanner type torque wrench with a marking function, and a partial enlarged front view. It is a top view which shows the spanner type torque wrench with a marking function of other embodiment of this invention. Similarly, it is a cross-sectional side view of a spanner type torque wrench with a marking function. It is a top view which shows operation | movement of the spanner type torque wrench with a marking function of further another embodiment of this invention. Similarly, it is a cross-sectional side view of a spanner type torque wrench with a marking function. It is a top view which shows the spanner type torque wrench with a marking function of further another embodiment of this invention. It is the top view and front view which show the conventional torque wrench with a marking function.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Spanner type torque wrench with marking function 2 Torque wrench body 3 Head member 3a Spanner part 4 Toggle mechanism 5 Stamp pressing rod 5a Busher 5b Roller cam follower 6 Ink cartridge 6a Stamp part 9 Stamp pressing magnet 10 Horizontal link 11 Vertical link 12 Link fulcrum 13 Side link 17 Start magnet 20 Drive pin 21 Link arm 31 Drive pin 33 Link arm 35 Roller follower 100 Nut 101 Pipe

Claims (6)

In the spanner type torque wrench with a marking function, the toggle mechanism operates when the tightening force on the bolt or nut reaches a predetermined value, and is automatically marked by a stamp.
A stamp body that is arranged to be capable of moving back and forth along the longitudinal direction of the torque wrench body, has a stamp portion at the tip, an activation portion that is displaced in conjunction with the displacement associated with the operation of the toggle mechanism, and a displacement of the activation portion. A spanner-type torque wrench with a marking function, comprising: a transmission portion that converts the movement forward in the longitudinal direction to advance the stamp body.   The spanner type torque wrench with marking function according to claim 1, wherein the transmission portion has a non-connected structure.   The transmission unit is provided on the starter unit side and the stamp body side, and the starter magnet is moved by the starter unit so that mutual magnetic force acts to advance the stamp body. The spanner type torque wrench with a marking function according to claim 1 or 2, further comprising a stamp pressing magnet to be pressed.   The marking function according to any one of claims 1 to 3, wherein the activation unit rotates or moves in a direction crossing the longitudinal direction in conjunction with a displacement associated with an operation of the toggle mechanism. Spanner type torque wrench with.   The marking according to any one of claims 1 to 4, wherein the transmission unit includes a cam provided on one side of the activation unit and the stamp body, and a cam follower provided on the other side. Spanner type torque wrench with function.   The said transmission part is provided with the rotary body rotated in response to the displacement accompanying the operation | movement of the said toggle mechanism, and the roller follower provided in this rotary body and contacting the said stamp main body. Spanner type torque wrench with marking function as described in Crab.

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