JP2013031908A - Insulated torque wrench - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an insulated torque wrench which can safely fasten a screw to be fastened until torque reaches a set fastening torque value.SOLUTION: The insulated torque wrench 1 comprises a tubular metal body member 2. A metal support member 3 for supporting a metal tip member 4 so as to be turnable is arranged at the tip of the body member 2. The body member 2 is covered with an insulated body cover member 31, and the tip member 4 is covered with an insulated tip cover member 32. An elastically-deformable insulated cover elastic member 33 is arranged so as to straddle the insulated body cover member 31 and the insulated tip cover member 32.

Description

  The present invention relates to an insulating torque wrench for tightening a tightened screw with a set tightening torque value.

  Conventionally, for example, a torque wrench described in Patent Document 1 is known.

  This conventional torque wrench has a tubular metal main body member having a tapered rear end, a metal support member provided at the front end of the main body member, and is rotated by the support shaft member. And a metal tip member supported in a possible manner.

  Further, in the tubular body member, when the tightening torque with respect to the screw to be tightened is less than the set tightening torque value, the rotation of the tip member is restricted, and when the tightening torque reaches the set tightening torque value, the tip member Tightening torque setting means (not shown) is provided that allows the rotation of the actuator and notifies the operator that the set tightening torque value has been reached.

Japanese Utility Model Publication No. 5-85554 (FIGS. 1 and 2)

  By the way, in recent years, for example, with the progress of hybridization of vehicles, electric vehicles, and the like, an insulating tool is indispensable for the manufacture and repair thereof, and the tightened screw is securely tightened until the set tightening torque value is reached. There is a need for an insulating torque wrench that can

  The present invention has been made in view of such a point, and an object thereof is to provide an insulating torque wrench capable of safely tightening a tightened screw until a set tightening torque value is reached.

  The insulating torque wrench according to claim 1 is supported in a rotatable manner by a tubular metal main body member, a metal support shaft member provided at the tip of the main body member, and the support shaft member. Elastic deformation provided to straddle the metal tip member, the insulating body cover member covering the body member, the insulation tip cover member covering the tip member, and the insulation body cover member and the insulation tip cover member A possible insulating cover elastic member.

  The insulating torque wrench according to claim 2 is the insulating torque wrench according to claim 1, wherein the insulating cover elastic member includes a main body side mounting portion attached to a mounting portion of the insulating main body cover member and a cover of the insulating tip cover member. A front-end-side attachment portion attached to the attachment portion, and either the main-body-side attachment portion or the attached portion of the insulating main body cover member has a main-body-side fitting convex portion, and the main-body-side attachment The other of the mounting portion of the insulating body cover member and the insulating body cover member has a body-side fitting concave portion that fits with the body-side fitting convex portion, and the tip-side mounting portion and the insulating tip cover member are covered. Either one of the attachment portions has a distal end side fitting convex portion, and either one of the distal end side attachment portion and the attached portion of the insulating distal end cover member is fitted with the distal end side fitting convex portion. It has a front end side fitting recessed part.

  According to the present invention, the insulating main body cover member covering the main body member, the insulating front end cover member covering the front end member, and the elastically deformable insulating cover elasticity provided to straddle the insulating main body cover member and the insulating front end cover member. Therefore, the tightened screw can be safely tightened until the set tightening torque value is reached.

It is a fragmentary longitudinal cross-sectional view of the insulation torque wrench which concerns on one embodiment of this invention. It is a whole longitudinal cross-sectional view of an insulation torque wrench same as the above. It is a whole top view of an insulation torque wrench same as the above.

  An embodiment of the present invention will be described with reference to the drawings.

  1 to 3, reference numeral 1 denotes an insulating torque wrench. The insulating torque wrench 1 is used when, for example, a vehicle or the like is manufactured or repaired, and a tightened screw a such as a nut or a bolt is set in advance. An insulating tool for tightening with a tightening torque value.

  The insulating torque wrench 1 is a tubular metal body member 2 having a circular shape in the horizontal direction and having a circular cross section, and a metal member in the vertical direction fixedly provided at the tip of the body member 2. At the support shaft member 3, a metal tip member (rotation member) 4 supported by the support shaft member 3 so as to be rotatable about the support shaft member 3, and at the tip of the tip member 4 And a metal rotating member 5 held rotatably about the vertical axis X.

  The rotating member 5 can rotate in only one direction with respect to the tip member 4, and rotation in the other direction is restricted by a rotation restricting means (not shown). The rotation restricting direction of the rotation restricting means can be switched. Further, as shown in FIG. 2, when the insulating torque wrench 1 is used, a socket b corresponding to the size of the tightened screw a is detachably attached to the lower end portion of the rotating member 5.

  The main body member 2 is formed in an elongated cylindrical shape having openings on both end surfaces having a distal end surface opening 8 and a proximal end surface opening 9. A cylindrical rubber or resin insulating grip member 11 is attached to the outer peripheral surface of the base end portion of the main body member 2 and is held by an operator (tightening operator).

  Shaft hole portions 12 and 13 are formed above and below the front end portion of the main body member 2, and a round shaft-shaped support shaft member 3 is fitted and inserted into the shaft hole portions 12 and 13. The upper end portion 3 a of the support shaft member 3 protrudes upward from the shaft hole 12 on the upper side of the main body member 2 and is covered with a metal shaft cover member 14. A space 18 exists between the outer surface of the upper end 3a and the inner surface of the shaft cover member 14. Further, the lower end 3 b for preventing the supporting shaft member 3 protrudes downward from the shaft hole 13 on the lower side of the main body member 2 and is covered with a metal shaft cover member 15. A space portion 19 exists between the outer surface of the lower end portion 3b and the inner surface of the shaft cover member 15.

  A metal cylindrical member 21 is fitted on the inner peripheral surface of the distal end portion of the main body member 2, and the support shaft member 3 is fitted and inserted into the shaft hole portion 22 of the cylindrical member 21. There is a gap 23 of a predetermined size between the inner peripheral surface of the tubular member 21 and the outer peripheral surface of the tip member 4.

  The front end member 4 is a cylindrical portion located outside the main body member 2, which is provided integrally with the longitudinal portion 24 located in the main body member 2 and protruded from the front end surface opening 8 of the main body member 2. Holding part 25. The rotating member 5 is rotatably held around the vertical axis X by a holding portion 25 that is a tip portion of the tip member 4. A shaft hole 26 is formed in the vicinity of the distal end of the longitudinal portion 24, the support shaft member 3 is fitted and inserted into the shaft hole 26, and the end member 4 is supported by the main body member 2. 3 can be turned around.

  The rotating member 5 includes a held portion 27 that is rotatably held around the vertical axis X by the holding portion 25 of the tip member 4, and an intermediate shaft portion 28 that is integrally provided at the lower end of the held portion 27. And a prismatic square shaft portion 29 integrally provided at the lower end of the intermediate shaft portion. When the insulating torque wrench 1 is used, the square shaft portion 29 of the rotating member 5 is fitted into the square hole b1 of the socket b, and the screw fitting hole b2 of the socket b and the screw to be tightened a are fitted to each other. (See FIG. 2).

  Further, the insulating torque wrench 1 covers the outer surface of the elongated cylindrical insulating main body cover member 31 covering the outer peripheral surface of the main body member 2 and the holding portion 25 of the tip member 4 and the outer periphery of the intermediate shaft portion 28 of the rotating member 5. A cylindrical insulating tip cover member 32 covering the surface, and an elastically deformable cylindrical insulating cover elastic member 33 provided so as to straddle the outer peripheral surface of the insulating main body cover member 31 and the outer peripheral surface of the insulating tip cover member 32 And. That is, for example, the distal end portion of the insulating main body cover member 31 and the proximal end portion of the insulating distal end cover member 32 are close to each other, and the insulating cover elastic member 33 is attached between both end portions close to each other.

  The insulating main body cover member 31 and the insulating tip cover member 32 are each integrally formed of, for example, a relatively hard resin material (for example, polypropylene) or a rubber material. The insulating cover elastic member 33 is integrally formed of a soft resin material or rubber material that is more flexible than the cover members 31 and 32. The insulating cover elastic member 33 is slightly elastically deformed by about several millimeters when the tip member 4 is rotated with respect to the main body member 2.

  The insulating main body cover member 31 is attached to the outer peripheral surface other than the base end portion of the main body member 2. Holes 36 and 37 are formed above and below the tip of the insulating main body cover member 31, the disc-shaped shaft cover member 14 is fitted into the upper hole 36, and the circular hole 37 is attached to the lower hole 37. A plate-shaped shaft cover member 15 is fitted. The outer surfaces of the upper and lower shaft cover members 14 and 15 are covered with an insulating cover elastic member 33.

  The shaft cover members 14 and 15 and the support shaft member 3 are disposed inside the central portion of the insulating cover elastic member 33 in the axial direction. The axial end edge of the insulating cover elastic member 33 and the metal shaft cover members 14 and 15 are separated by a predetermined distance or more, and the operator touches the axial end edge of the insulating cover elastic member 33. It is designed not to get an electric shock.

  The insulating tip cover member 32 is attached to the outer surface of the holding portion 25 of the tip member 4. The insulating tip cover member 32 includes a disc-like plate-like portion 41 that is close to and opposed to the tip surface of the insulating main body cover member 31 with a slight gap 40, and an up-down direction provided integrally with the plate-like portion 41. And a cylindrical portion 42.

  The cylindrical portion 42 is formed in a cylindrical shape having openings on both end surfaces having an upper end surface opening 43 and a lower end surface opening 44. The cylindrical portion 42 is composed of an upper cylindrical portion 42 a and a lower cylindrical portion 42 b, and the upper cylindrical portion 42 a is attached to the outer surface of the holding portion 25 of the tip member 4. A space 47 exists between the lower cylindrical portion 42 b and the intermediate shaft portion 28 of the rotating member 5. A rubber or resin lid member 45 is attached to the concave groove 46 at the upper end of the cylindrical portion 42, and the upper end surface opening 43 is closed by the lid member 45. The angular shaft portion 29 of the rotating member 5 protrudes downward from the lower end surface opening 44 of the cylindrical portion 42.

  The insulating cover elastic member 33 is attached across the outer peripheral surfaces of the cover members 31 and 32. The insulating cover elastic member 33 is formed in a cylindrical shape with openings on both end surfaces having an axial direction in the horizontal direction. The insulating cover elastic member 33 has a main body side mounting portion 52 attached to the outer peripheral surface of the mounted portion 51 of the insulating main body cover member 31 on one end side in the axial direction, and the mounted portion 53 of the insulating tip cover member 32. The front end side attaching portion 54 attached to the outer peripheral surface of the head is provided on the other end side in the axial direction.

  The attached portion 51 of the insulating main body cover member 31 is configured by a tip portion that is an end portion of the insulating main body cover member 31 on the insulating tip cover member 32 side. The attached portion 53 of the insulating tip cover member 32 is configured by a base end portion (plate-like portion 41) that is an end portion of the insulating tip cover member 32 on the insulating main body cover member 31 side.

  The attached portion 51 of the insulating main body cover member 31 has one flange-like body-side fitting convex portion 56 formed in a convex ring shape on the outer peripheral surface of the attached portion 51. The main body side mounting portion 52 of the insulating cover elastic member 33 is formed in a concave ring shape on the inner peripheral surface of the main body side mounting portion 52, and is fitted into one concave groove-shaped main body side fitting. A recess 57 is provided. That is, the main body side attaching portion 52 is attached to the attached portion 51 of the insulating main body cover member 31 only by fitting the main body side fitting convex portion 56 and the main body side fitting concave portion 57.

  The main body side attaching portion 52 may have the main body side fitting convex portion 56, and the attached portion 51 may have the main body side fitting concave portion 57.

  The attached portion 53 of the insulating tip cover member 32 has one flange-like tip side fitting convex portion 58 formed in a convex ring shape on the outer peripheral surface of the attached portion 53. The front end side mounting portion 54 of the insulating cover elastic member 33 is formed in a concave ring shape on the inner peripheral surface of the front end side mounting portion 54 and is fitted in one concave groove-shaped front end side fitting that fits the front end side fitting convex portion 58. A recess 59 is provided. That is, the front end side attaching portion 54 is attached to the attached portion 53 of the insulating front end cover member 32 only by fitting the front end side fitting convex portion 58 and the front end side fitting concave portion 59.

  The distal end side attaching portion 54 may have the distal end side fitting convex portion 58 and the attached portion 53 may have the distal end side fitting concave portion 59.

  The body-side fitting recess 57 has a concave groove shape with a square cross section, and is formed in the vicinity of one axial end of the inner peripheral surface of the insulating cover elastic member 33. The front end fitting recess 59 has a concave groove shape with a square cross section, and is formed in the vicinity of the other axial end of the inner peripheral surface of the insulating cover elastic member 33. An annular recess 60 that faces the shaft cover members 14 and 15 is formed in the center portion in the axial direction of the inner peripheral surface of the insulating cover elastic member 33.

  Further, the outer peripheral surface of the insulating cover elastic member 33 is formed in a wave shape. In other words, the central portion in the axial direction of the outer peripheral surface of the insulating cover elastic member 33 is constituted by the corrugated surface 61 that advances along the axial direction.

  On the other hand, in the tubular main body member 2, when the tightening torque for the tightened screw a is less than the set tightening torque value, the rotation of the tip member 4 with respect to the main body member 2 is restricted, and the tightening torque is When the set tightening torque value is reached, there is provided a tightening torque setting means (not shown) that allows the tip member 4 to rotate relative to the body member 2 and informs the operator that the set tightening torque value has been reached. ing.

  This tightening torque setting means is a well-known one described in, for example, Japanese Utility Model Publication No. 59-38994, and is composed of a coiled compression spring, a spring receiver and the like. The set tightening torque value can be adjusted by a turning operation of a cylindrical operation member 63 that is rotatably provided on the main body member 2.

  Next, the operation of the insulating torque wrench 1 will be described.

  For example, when the insulating torque wrench 1 is used in manufacturing a vehicle such as a hybrid or an electric vehicle, the operator first rotates the socket b corresponding to the size of the tightened screw a to be tightened. Attached to the angular shaft portion 29 of the member 5.

  Next, the operator, after fitting the screw to be tightened a and the screw fitting hole b2 of the socket b, holds the insulating grip member 11 with one hand and the insulating cover elastic member with the other hand, for example. By rotating the main body member 2 repeatedly while gripping 33, the rotating member 5 is rotated with respect to the tip member 4 in the tightening direction which is one direction together with the tightened screw a.

  At this time, the part touched by the operator's hand is an insulating material (insulating grip member 11, insulating body cover member 31, insulating tip cover member 32, and insulating cover elastic member 33) covering the torque wrench main body portion made of a metal material such as iron. ), There is no risk of accidental electric shock even when tightening work near the electric circuit.

  In this way, the tightened screw a is safely tightened. When the tightening torque (torque acting on the tip member 4) for the tightened screw a reaches a preset set tightening torque value, the tightening torque is increased. The tip member 4 slightly rotates about the support shaft member 3 with respect to the main body member 2 against the biasing force of the compression spring of the setting means, and the insulating cover elastic member as the tip member 4 rotates. 33 is slightly elastically deformed.

  As a result, the striking portion of the tip member 4 strikes a part of the inner peripheral surface of the main body member 2 to generate a notification sound, and the generated notification sound causes the operator to tighten the tightening torque to the tightened screw a. It will be known that the set tightening torque value has been reached.

  According to such an insulating torque wrench 1, the insulating main body cover member 31 covering the main body member 2, the insulating front end cover member 32 covering the front end member 4, the insulating main body cover member 31 and the insulating front end cover member 32, Insulating cover elastic member 33 that can be elastically deformed so as to straddle the wire, there is no risk of electric shock even in the tightening work near the electric circuit, and the tightened screw a is set to the set tightening torque value. It can be tightened safely until it reaches.

  In addition, either the main body side mounting portion 52 of the insulating cover elastic member 33 or the mounted portion 51 of the insulating main body cover member 31 has the main body side fitting convex portion 56, and either of the other is the main body side fitting convex portion. A body-side fitting recess 57 that fits with the portion 56, and either one of the tip-side mounting portion 54 of the insulating cover elastic member 33 and the mounting portion 53 of the insulating tip cover member 32 is a tip-side fitting convex. The insulating cover elastic member 33 is displaced when the tightened screw a is tightened because the other end has the front end side fitting concave portion 59 that fits with the front end side fitting convex portion 58. Can be prevented, and the tightening operation of the tightened screw a can be performed more safely.

  Furthermore, since the outer peripheral surface of the insulating cover elastic member 33 is formed in a wave shape, the insulating cover elastic member 33 can be smoothly elastically deformed, and the operator holds the outer peripheral surface of the insulating cover elastic member 33. When doing so, the hand is hard to slip, and the tightening operation can be performed even more safely.

  The insulating torque wrench 1 has the main body side mounting portion 52 attached to the mounted portion 51 only by fitting the main body side fitting convex portion 56 and the main body side fitting concave portion 57, and the distal end side fitting convex portion 58. The configuration is not limited to the configuration in which the distal end side attachment portion 54 is attached to the attached portion 53 only by fitting with the distal end side fitting recess 59. For example, a contact agent or the like is used in addition to the fitting, and the insulating cover A configuration in which the elastic member 33 is fixedly provided across the cover members 31 and 32 may be employed.

  Further, for example, the plurality of main body side fitting convex portions 56 and the plurality of main body side fitting convex portions 57 are fitted to each other, and the plurality of leading end side fitting convex portions 58 and the plurality of leading end side fitting concave portions 59 are fitted to each other. The structure etc. which match may be sufficient.

  Further, the configuration is not limited to the configuration in which the rotating member 5 is rotatably provided on the tip member 4. For example, the tip member has a wrench portion and the tightening screw a is tightened by the wrench portion of the tip member. Good.

1 Insulating torque wrench 2 Body member 3 Support shaft member 4 Tip member
31 Insulation body cover member
32 Insulated tip cover member
33 Insulation cover elastic member
51 Mounted part
52 Body side mounting
53 Mounted part
54 Tip side mounting
56 Body side mating protrusion
57 Body side fitting recess
58 Tip-side mating protrusion
59 Tip side fitting recess

Claims (2)

A tubular metal body member;
A metal support member provided at the tip of the body member;
A metal tip member rotatably supported by the support shaft member;
An insulating body cover member covering the body member;
An insulating tip cover member covering the tip member;
An insulating torque wrench comprising: an elastically deformable insulating cover elastic member provided so as to straddle the insulating main body cover member and the insulating tip cover member. The insulating cover elastic member
A main body side mounting portion attached to a mounted portion of the insulating main body cover member;
A tip-side mounting portion attached to the attached portion of the insulating tip cover member;
Either one of the main body side attaching portion and the attached portion of the insulating main body cover member has a main body side fitting convex portion,
Either one of the main body side attaching portion and the attached portion of the insulating main body cover member has a main body side fitting concave portion that fits with the main body side fitting convex portion,
Either one of the tip side attachment portion and the attached portion of the insulating tip cover member has a tip side fitting convex portion,
2. The insulation according to claim 1, wherein one of the tip-side attachment portion and the attached portion of the insulating tip cover member has a tip-side fitting recess that fits with the tip-side fitting projection. Torque Wrench.

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