JP2014058021A - Marker for torque tool and torque tool with marker - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a marker for a torque tool such as a torque wrench having a pen point capable of applying marking to screw fastening means having a stepped shape of a plurality of stages.SOLUTION: The marker is equipped in the torque tool, and applies the marking by pressing the pen point 7 toward a predetermined marking object part when fastening torque reaches a set torque value, and the pen point 7 has a core part 9 formed in a columnar shape of supplying ink toward the tip from a rear end part by a capillary phenomenon, and a tip part of the core part 9 has an elastic deformation part 9a integrally elastically deformed by following after a surface shape of the marking object part by pressing force applied in marking.

Description

  The present invention relates to a torque tool marker for applying a matching mark to a predetermined portion in order to prevent forgetful tightening and to confirm looseness.

  A torque wrench with a marker is provided for prevention of forgetting tightening and confirmation of looseness (Patent Document 1). In this torque wrench with a marker, for example, when a screw fastening means such as a bolt or a nut is tightened with a predetermined torque value, the marker pen tip is pressed against the side surface of the bolt to perform a marking.

  The marker has a fiber nib in which felt or synthetic fiber is hardened in a columnar shape, and an ink container into which the rear end of the nib is inserted. For example, quick-drying ink is applied to the tip of the nib by capillary action. Supply.

  The tip of the marker core that is equipped with the torque wrench has a cylindrical core with a tapered tip, so the dot-shaped countermark that is smaller than the diameter of the core is marked by the screw fastening means Apply to the part. In this case, the range of the marked portion is limited, and is limited, for example, between the shaft portion of the bolt and the surface of the nut screwed into the shaft portion.

  For this reason, for example, when a washer, a spring seat, etc. are arranged between a nut with a flange and a body to be fastened, and the screw fastening means having a multi-stepped shape as a whole is used as a marked portion , Marking that covers all this marking part is not possible.

JP 2007-015052 A

  An object of the present invention is to provide a marker for a torque tool such as a torque wrench provided with a pen tip capable of marking a screw fastening means having a plurality of steps, and a torque wrench with a marker. .

  The marker configuration that solves the problem of the present invention is a marker that is equipped with a torque tool, and when a tightening torque reaches a set torque value, a marker is applied by pressing a pen tip toward a predetermined marked portion, The nib has a core part formed in a column shape for supplying ink by capillary action from the rear end part toward the tip, and the tip part of the core part is a surface of the part to be marked by a pressing force applied during marking. It has an elastic deformation part that elastically deforms integrally following the shape.

  A configuration of a torque tool that solves the problems of the present invention includes a marking device that includes a marker having the above-described configuration and a marker push-out portion that pushes the marker toward a portion to be marked. When tightened with a value, the marker driving unit operates the marking device, and the elastic deformation portion of the pen point marks the marked portion.

  According to the first aspect of the present invention, when the elastic deformation portion of the nib is elastically deformed, for example, at the time of marking the counter mark, the elastic deformation portion bends or forms an expanded stamp surface. The mating marks can be marked at a time including, for example, a stepped portion of a tightened nut, washer and washer.

  According to the second aspect of the present invention, only the elastically deformable portion is elastically deformed at the time of marking, and the uneven portion of the marked portion can be marked reliably by following the elastic deformable portion to the surface shape of the marked portion.

  Moreover, according to the invention which concerns on Claim 2, an elastic deformation part can be elastically deformed easily.

  According to the invention of claim 3, for example, when a washer and a washer are arranged between the nut and the fastening portion and the nut is fastened to the bolt, not only between the nut and the bolt, It has become possible to mark a wide range of alignment marks including a washer or a fastened part.

The partially broken longitudinal cross-sectional view of the torque wrench with a marker which shows 1st Embodiment of this invention. The longitudinal cross-sectional view of the marker with which the torque wrench of FIG. 1 was equipped. 2 shows the tip of the pen tip mounted on the marker of FIG. 2, (a) when non-marking when no load is applied to the pen tip, and (b) and (c) when marking when a load is applied to the pen tip, respectively. Show. The figure which shows the marking state when a nut is fastened with the torque wrench of FIG. It is an external appearance front view of the torque driver with a marker which shows 2nd Embodiment of this invention, and shows the state before tightening. The position of the pen tip of the marker provided in the torque driver of FIG. 5 is shown, (a) shows before tightening, and (b) shows after tightening.

  Hereinafter, the present invention will be described in detail based on embodiments shown in the drawings.

  FIG. 1 is a partially broken longitudinal sectional view of a torque wrench with a marker showing a first embodiment of the present invention, and FIG. 2 is a sectional view of the marker equipped in FIG.

  In FIG. 1, the torque wrench 1 has a marking device 2. The marking device 2 includes a marker 3 and a marker pusher 4 that pushes the marker 3 for marking. The configuration of the torque wrench 1 and the configuration of the marker pusher 4 will be described later.

  In the marker 3, the ink tank portion 6 is fixed to the rear end portion of the marker case 5, and the guide portion 8 that holds the core portion 9 of the pen tip 7 so as to be movable in the axial direction is fixed to the tip portion of the marker case 5. . The pen tip 7 has the rear end portion of the core portion 9 inserted into the ink tank portion 6, and the tip end portion of the pen tip 7 projects forward from the tip end of the marker case 5. In the ink tank 6, a rubber stopper 12 for ink replenishment is attached to the rear end opening 11 of the ink tank 10. A closing plate 13 made of, for example, a rubber plate is disposed at the front end of the ink tank 10, and an opening 14 is formed at the center.

  A constricted portion 15 formed in a constricted shape is formed at the rear end portion of the core portion 9, the tapered surface on the rear end side of the constricted portion 15 is used as a valve body 15 a, and the tapered surface on the distal end side of the constricted portion 15 is infiltrated with ink. Part 15b. The pen tip 7 is inserted into the opening 14 so that the constricted portion 15 can move in the axial direction with the inner periphery of the opening 14 as a valve seat 14a.

  A guide shaft portion 16 is integrally formed at the rear end of the core portion 9 toward the rear in the axial direction. In the ink tank 10, a partition wall 17 that divides the inside of the ink tank 10 into two chambers, a first chamber 10 a and a second chamber 10 b, is arranged, and a cylindrical tube portion 18 is formed at the center of the partition wall 17. It is integrally formed toward the rear. A guide shaft portion 16 is inserted into the cylindrical portion 18, and a core shaft pressing spring 19 is mounted between the inner bottom of the cylindrical portion 18 and the rear end surface of the constricted portion 15. The nib 7 is urged toward the distal end side by the core shaft pressing spring 19, the valve body 15 a of the constricted portion 15 contacts the valve seat 14 a of the opening 14, and the ink in the second chamber 10 b passes through the opening 14 and the constricted portion 15. Is prevented from entering the core shaft guide portion 8 surrounding the core. A communication hole 18b is formed in the inner bottom 18a of the cylindrical portion 18, and the ink in the first chamber 10a is supplied to the second chamber 10b through the communication hole 18b.

  The pen tip 7 of the marker 3 is constituted by a fibrous core portion obtained by solidifying felt or a synthetic fiber in a columnar shape, and the tip portion of the pen tip 7 is not frayed like a brush tip.

  Further, when the tip of the pen tip 7 is brought into contact with the portion to be marked and the marker case 5 is further pushed in, the pen tip 7 and the ink tank portion 6 are relatively moved against the spring force of the push spring 19 in the axial direction. The valve body 15a and the valve seat 14a are opened, the ink in the second chamber 10b flows into the constricted portion 15, and, for example, quick-drying ink is supplied to the tip of the pen tip 7 by capillary action through the ink penetrating portion 15b. Is done.

  FIG. 3 shows the tip of the pen tip 7. In the tapered portion, as shown in FIG. 3A, the pen tip 7 is axially rearward from the tip, for example, about half the diameter. A range A of this length is defined as a deformable portion 9a that can be elastically deformed, and the rear portion in the axial direction from the range A is a portion having a large rigidity that cannot be bent or deformed by the pressing force at the time of marking. Further, the deforming portion 9a as a whole forms a single protruding portion, and when it is pressed toward the abutted surface, the deforming portion 9a is elastically deformed, bent, or spreads radially outward as a whole, and the deformed portion 9a The tip surface comes into contact with the outer shape of the abutted surface while increasing the contact area. And if the pressing force with respect to the pen point 7 is cancelled | released, the deformation | transformation part 9a will elastically return to the original shape.

  For example, as shown in FIG. 3B, when the pen tip 7 is crushed, when the pen tip 7 is pressed straight against the contact surface along the axial direction, the deformed portion 9a becomes, for example, a stamp surface having a diameter D1. To mark an alignment mark having a diameter D1. When the pressing force is released, the deformed portion 9a of the nib 7 returns to the original bullet-shaped curved surface shown in FIG. The core portion 9 is formed in a tapered shape from a hard base portion having a constant diameter toward the distal end side. When the diameter of the base portion is D0, D1> D0, and if the length of the range A is increased, D1 However, since the elastic restoring force of the deforming portion 9a is weakened, it is preferable that D1 is at most about 2.5 times D0. In addition, with a brush or a brush, the hair frays when the tip is pressed, and even if the pressing force is released, it does not immediately return to the original brush tip or brush tip shape. However, the pen tip 7 according to the present embodiment is deformed as a whole with the deformed portion 9a, so that even if it is deformed, when the pressing force is released, the pen tip 7 immediately returns to its original shape due to the elastic force.

  Further, when the pen tip 7 is moved along the axial direction and the tip of the pen tip 7 is brought into contact with the contacted surface, a force is applied to the deformed portion 9a of the pen tip 7 in a direction perpendicular to the axial direction. As shown in FIG. 3 (c), the deforming portion 9a is bent and deformed by being deviated in the radial direction, thereby marking an elliptical alignment mark.

  FIG. 4 is a cross-sectional view of a screw fastening means in which a washer 33 and a washer 34 are overlapped between the nut 31 and the fastened body 30 when the fastened body 30 is fastened to the bolt 31 by fastening the nut 32. Indicates the state of marking. The nut 32, the washer 33, and the washer 34 have a stepped shape as shown in FIG. The nib indicated by reference numeral 40 (the diameter of the base portion of the core 41 is D0) is a conventional structure in which the tip of the nib 40 is not deformed, and the nut 32, washer 33 and washer 34 are aligned at a time. Even when trying to mark, the tip of the pen tip 40 abuts only on the portion where the nut 32 and the washer 33 are in contact, and as a result, the alignment mark m1 is marked at the location where the nut 32 and the washer 33 are in contact. The stepped portion of the washer 34 cannot be marked at a time.

  On the other hand, in the nib 7 of this embodiment (the diameter of the core 7 is D0), since the deformed portion 9a is formed at the tip of the nib 7, for example, as shown in FIG. When the deforming portion 9a is biased and deformed, the deforming portion 9a deforms following the stepped portion of the nut 32, washer 33, and washer 34. As a result, the mating mark m2 is a step where the nut 32, washer 33, and washer 34 are in contact with each other. The stepped portions of the nut 32, washer 33, and washer 34 can be marked at a time. That is, according to the present embodiment, the deformed portion 9 a is provided at the tip of the nib 7, whereby the stepped portion where the side surface of the nut 32 and the flat surface of the washer 33 intersect, the side surface of the washer 33, and the washer 34. This makes it possible to mark the mating mark m2 at a time against the stepped portion intersecting with the flat surface and the side surface of the washer 34.

  Next, the structure of the torque wrench 1 and the configuration of the marker pusher 4 of the marking device 2 will be described below.

  When the tightening target is a hexagon socket head bolt, the torque wrench 1 is tightened by inserting the tip of the hexagon stick wrench 51 into the hexagon socket and tightening the nut 32 as shown in FIG. Attach to the tip of the hexagon stick wrench 51. Since the socket 52 covers the entire circumferential surface of the nut 32, the pen tip 9 of the core shaft 7 of the marker 3 cannot contact the side surfaces of the nut 32, washer 33, and washer 34, so the pen tip 9 enters the side surface of the socket 52. A notch is formed.

  When the nut 32 is tightened with a predetermined torque value by the socket 52, the alignment mark m2 is marked on the side surface including the stepped portions of the nut 32, the washer 33, and the washer 34 as shown in FIG.

  In FIG. 1, the torque wrench 1 is provided with a toggle mechanism (not shown) as a torque limiter in a handle (tube) 61. A head 62 is attached to the distal end portion of the tube 61 through a support shaft 63 so as to be swingable. The toggle mechanism rotates a dial 64 to cause a nut portion (not shown) to be screwed along the axial direction by rotation of a screw shaft portion (not shown) arranged in the tube 61, thereby toggling the nut portion and the toggle portion. The set torque value is adjusted by adjusting the spring force of a torque value setting spring (not shown) arranged between the seat (not shown). The toggle mechanism includes a toggle rest (not shown) formed at the rear end of the lever portion 62a of the head 62 with a gap in the axial direction between the toggle seat and the toggle seat and the toggle rest. It is connected by a lever (not shown).

  When the nut 61 is tightened by the rotation of the tube 61 and the set torque value set by the rotation of the dial 64 is reached, the toggle seat is pushed back against the spring force of the torque value setting spring via the toggle lever, and the toggle mechanism is activated. To do. Then, it is determined that the tube 61 is rotated with respect to the head 62, the rotational power is rapidly reduced, and the tightening with the set torque value is completed. That is, when the set torque value is reached, the tube 61 and the head 62 rotate relatively with the support shaft 63 as a fulcrum.

  In the present embodiment, the marker drive mechanism 66 is driven by the power conversion unit 65 that converts the relative rotation of the tube 61 and the head 62 around the axis of the support shaft 63 into linear movement in the axial direction of the support shaft 63. . The axial direction of the support shaft 63 is referred to as the vertical axis.

  The marker drive mechanism 66 has a lever 68 whose tip moves along the vertical axis with the lever fulcrum shaft 67 as a fulcrum, and the lever 68 is tilted and driven in the vertical axis direction by the output of the power converter 65. The tube 61 will be described below with the side on which the lever 68 is disposed as the upper surface and the opposite surface as the lower surface.

  In the present embodiment, a long hole 62b is formed in the lever portion 62a of the head 62 along the swinging direction of the head 62, and the marker operating lever 69 passes through the long hole 62b with a gap therebetween. One end of the operating lever 69 is connected to the tip of the lever 68 at a position above the upper surface of the tube 61.

  The other end of the marker operating lever 69 penetrates the lower surface of the tube 61 and is connected to the marker pressing lever 70. One end of the marker pressing lever 70 is slidably connected to the lower surface side of the tube 61 via a support shaft 71, and a pressing roller 72 is attached to the other end. Therefore, when the lever 68 is tilted downward by the operation of the toggle mechanism, the marker operating lever 69 is lowered, the marker pressing lever 70 is rotated clockwise in FIG. Moves clockwise to the marker operating position in FIG.

  The front end portion of the head 62 is formed in a ring shape having a flange portion 62c on the upper surface side, and the hexagon stick wrench guide tube 73 formed in a cylindrical shape inside the flange portion 62c is not rotatable about the axis. It is installed. For example, the inner periphery of the flange portion 62c is formed in a hexagonal shape, and the external shape of the hexagon stick wrench guide tube 73 fitted to the flange portion 62c is a hexagonal shape, thereby preventing rotation around the axis in the fitted state. Is done.

  The hexagonal bar wrench guide cylinder 73 has a hexagonal inner peripheral shape, and a hexagonal bar wrench as a tightening torque transmitting member inserted into the hexagonal bar wrench guide cylinder 73 (the external shape is formed in a hexagonal shape). With respect to 51, it is impossible to rotate around the axis, and it is movable in the axial direction.

  In this embodiment, the hex wrench 51 inserted into the hex wrench guide tube 73 can adjust the protruding length from the tip of the hex wrench guide tube 73 by turning the allowance adjusting screw 74. The head allowance adjustment screw 74 passes through the shaft hole 76 of the screw support base 75 that is screwed into the upper end inner diameter portion of the hexagon wrench guide cylinder 73, and the head 77 is supported. Further, a retaining cap 78 is screwed onto the upper part of the screw support 75 to prevent the head 77 of the allowance adjusting screw 74 from moving upward. A jig hole 79 is formed in the retaining cap 78, and a jig (not shown) is inserted into the head 77 of the allowance adjusting screw 74 through the jig hole 79. It can be rotated clockwise and counterclockwise.

  The marker driving mechanism cover 80 is also provided with a jig hole 81, from which a jig (not shown) is inserted, and the jig is inserted through the jig hole 79 of the retaining cap 78 and the head of the allowance adjusting screw 74 is inserted. The unit 77 can be reached. The jig hole 81 is usually closed by a rubber lid member 82.

  The allowance adjusting screw 74 has a threaded portion formed on the outer periphery of the lower end portion, and is screwed into a screw hole 51 a formed from the upper end portion side of the hexagon stick wrench 51. Therefore, when the allowance adjusting screw 74 is rotated by the jig, the movement of the allowance adjusting screw 74 is restricted in the axial direction, so that the hexagon stick wrench 51 is guided to the hexagon stick wrench guide tube 73 and the hexagon The rod wrench guide cylinder 73 moves forward and backward.

  Since the hexagon wrench guide cylinder 73 described above is configured to be fitted in the flange portion 62c of the head 62 along the axial direction, the fixed block member 83 is removed from the flange of the head 62. It is fixed to a surface opposite to the portion 62c via a fixing bolt 84 to prevent the hexagon stick wrench guide tube 73 from moving downward in the axial direction to prevent the hexagon stick wrench guide tube 73 from falling off and It also functions as a support base.

  The fixed block member 83 includes an outer cylinder portion 85 through which the hexagon wrench guide cylinder 73 is inserted, and a shaft holding portion that is integrally provided at the lower end portion of the outer cylinder portion 85 and holds the support shaft 86 of the marking device 2. 87.

  Both the outer cylinder portion 85 and the shaft holding portion 87 are formed with holes extending in the vertical direction, and the axial direction of these holes is a direction perpendicular to the tube 61. The shaft holding portion 87 is disposed toward the marker pressing lever 70 side, and the marking device 2 is disposed obliquely between the marker pressing lever 70 and the tip of the hexagon stick wrench 51.

  In addition, the state which the marking apparatus 2 has arrange | positioned diagonally between the marker press lever 70 and the front-end | tip of the hexagon stick wrench 51 tightens the nut 32 as a torque wrench, and marks the alignment mark m2 in the part shown in FIG. Indicates.

  The marking device 2 has an external appearance structure in which a support shaft 86 is provided upward with an angle α (0 degree <α <90 degrees) from a fixed cylindrical portion 90 formed in a cylindrical shape. Is attached to the shaft holding portion 87 of the fixed block member 83.

  When the push button 101 protruding rearward from the rear end of the fixed cylinder portion 100 is pushed forward, the marker pushing portion 4 of the marking device 2 causes the push rod 103 to point the marker 3 forward via the internal spring 102. As shown in FIG. 4, the deformed portion 9a of the core shaft 7 is pressed against the surface to be marked, which is a stepped portion of the nut 32, the washer 34, and the washer 34, and the counter mark m2 is marked.

  Since the marking device 2 is arranged to be inclined with respect to the hexagon stick wrench 51, the marker 3 may not be pushed onto a predetermined marking surface depending on the length to the tip of the hexagon stick wrench 51. For this reason, the deformation | transformation part 9a of the nib 7 of the marker 3 can be extrude | pushed to a predetermined to-be-marked surface by adjusting the allowance of the hexagon stick wrench 51. The marker 3 is urged rearward by the spring force of the spring 104 disposed between the peripheral edge portion of the distal end opening of the fixed cylinder portion 100.

  In the present embodiment, the case where the deformed portion 9a of the nib 7 is deformed to be biased to one side as shown in FIG. 3C has been described as an example. However, as shown in FIG. In some cases, an alignment mark m2 having a diameter D1 that is about 2.5 times as large as the diameter D0 of the portion 7 is marked on a surface to be marked, which is a stepped portion of the nut 32, the washer 34, and the washer 34.

  The torque wrench with a marker is not limited to the configuration shown in FIG. 1. For example, the marker 3 of the marking device 2 may be moved by a wire cable. In short, when the set torque value is reached, the marker 3 is directed toward the surface to be marked. Any configuration can be used as long as the pen tip 7 can be pressed against the surface to be marked.

Second Embodiment FIG. 5 is an external front view of a torque driver with a marker according to a second embodiment, and FIG. 6 shows a state of the marker before and after tightening.

  A torque driver with a marker (hereinafter simply abbreviated as a torque driver) 201 of the present embodiment includes a case 210 that forms a grip portion formed in a bottomed cylindrical shape, and a torque limiter portion (not shown) disposed in the case 210. A spindle (not shown) arranged in the case 210 connected to the case 210 via a torque limiter part, a marker operating part (not shown) arranged in the tip of the case 210, and a marker operating part A marker 250 that is moved in the axial direction, and a coupler 260 in which the bit 270 is replaceably mounted and the marker portion 250 is built in and the tip end portion of the main shaft is connected, and the tip end portion of the bit 270 is fastened. It engages with a bit engagement hole formed in the head 281 of the screw 280 as a member.

  The marker 250 is provided with an ink tank (not shown) at the rear end of the pipe-shaped marker main body 251, and the pen tip 7 is provided at the front end of the marker main body 251. The pen tip 7 is disposed at a position corresponding to the side surface of the screw 280.

  When the torque driver 201 of the present embodiment grasps the case 210 and rotates it in a predetermined tightening direction, the tightening torque is transmitted to the bit 270 attached to the coupler 260 via the torque limiter and the main shaft, and tightening of the screw 280 is started. To do. When the set torque value is reached, the torque limiter operates, and the transmission of torque to the bit 270 is interrupted by the relative rotation of the main shaft and the case 210.

  The marker actuating unit is configured as a conversion mechanism that converts the rotational operation around the axis of the torque limiter into a linear movement operation in the axial direction when the set torque value is reached. When the main shaft and the case 210 rotate relatively around the main shaft, the marker actuating portion slides toward the front end in the axial direction along the outer surface of the bit 270 and is provided at the front end of the marker 250. The pen tip 7 moves from the standby state shown in FIG. 6A to the state shown in FIG. 6B and contacts the washer 282 along the side surface of the screw 280. At that time, the deformed portion 9a of the nib 7 is elastically deformed so as to enter the stepped portion of the screw 280 and the washer 282, and the alignment mark is marked.

DESCRIPTION OF SYMBOLS 1 Torque wrench 2 Marking device 3 Marker 4 Marker extrusion part 5 Marker case 6 Ink tank part 7 Pen tip 8 Core axis guide part 9 Core part 9a Deformation part 10 Ink tank 11 Rear end opening part 12 Rubber plug 13 Closing plate 14 Opening 15 Constriction portion 16 Guide shaft portion 17 Partition wall 18 Tube portion 19 Core shaft push spring 30 Fastened portion 31 Bolt 32 Nut 33 Washer 34 Washer m1, m2 Alignment mark 61 Tube 62 Head 65 Power conversion portion 66 Marker drive mechanism

Claims (3)

It is a marker that is equipped with a torque tool, and when the tightening torque reaches the set torque value, the pen tip is pressed toward a predetermined marked part to perform marking,
The nib has a core part formed in a column shape for supplying ink by capillary action from the rear end part toward the tip, and the tip part of the core part is a surface of the part to be marked by a pressing force applied during marking. A marker comprising an elastically deformable portion that integrally elastically deforms following a shape.   2. The marker according to claim 1, wherein the core portion is formed in a columnar shape, and the rear portion of the elastically deformable portion is provided with a rigidity that is not deformed by a pressing force at the time of marking. A marking device comprising: the marker according to claim 1 or 2; and a marker extruding unit that extrudes the marker toward a marked portion;
A torque tool, wherein when a screw fastening means is tightened with a predetermined torque value, a marker driving unit operates the marking device, and an elastically deforming portion of the pen tip marks the portion to be marked.

Images