JP2008023623A - Wrench - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a wrench capable of rotating a nut with a good rotating operability similar to that of a closed wrench in cases where the use of the closed wrench is difficult. <P>SOLUTION: This wrench S1 is formed with a pair of left/right clamping pieces 2 and 2 at the tips of a grip part 1, a nut fitting recess part 3 where an even-angle nut 5 more than a quadrangle is fitted and which has an opening at further parts of its parallel two sides 3a and 3a, is formed between the clamping pieces 2, and detachment-prevention projections 4 and 4 engaged with the sides 5a of the even-angle nut 5 are projected inward from the tips of the clamping pieces 2 and 2. In a wrench used for rotating a pipe fastening/fixing nut threadedly engaged with a pipe inlet of a pipe joint, the mutual interval W of the detachment-prevention projections 4 and 4 is formed larger than the outside diameter D of the pipe 6. The detachment-prevention projections 4 and 4 prevent the wrench S1 from being detached sideways from the nut 5 and also prevent the grip part 1 from easily inclining in the axial direction of the nut to provide the good rotating operability similar to that of the closed wrench. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a spanner, and more particularly to a spanner imparted with good operability similar to a so-called spectacle wrench.

  As is well known, an ordinary spanner forms a pair of left and right sandwiching pieces bifurcated at the tip of a grip part, and a recess in which a hexagon nut is fitted between the pair of left and right sandwiching pieces. And it has the structure which formed the nut fitting recessed part by which the part ahead of the parallel two sides was open | released.

  In such a wrench, when the nut is fitted into the nut fitting recess and rotated, the nut fitting recess is easily detached from the nut to the side, and the spanner grip portion is inclined in the axial direction of the nut. Therefore, there is a problem in that the rotation operability is not so good because it is difficult to hold in the direction substantially perpendicular to the axial direction.

  On the other hand, since the so-called spectacle wrench is formed with a nut fitting ring in which a nut is fitted to the end of the grip portion, when the nut fitting ring is fitted and rotated, Since the nut fitting ring is difficult to be detached from the nut and the grip portion of the spectacle wrench can be held substantially at right angles to the axial direction of the nut, there is an advantage that the rotation operability is good. However, when a pipe is inserted into the pipe insertion port of a pipe joint in which a pipe fastening nut is screwed into the pipe insertion port, and the nut is rotated to tighten and fix the pipe, There is a problem that the spectacle wrench cannot be used because the nut cannot be engaged with the nut fitting ring of the spectacle wrench.

By the way, as a spanner for improving the rotational operability, for example, a fixed clamping piece and a swingable clamping piece are provided at the tip of the grip part, and a recess in which a hexagon nut is fitted between these clamping pieces. A formed spanner is known (Patent Document 1). Since this spanner can swing one clamping piece, it can be tightened or loosened continuously without removing the nut while it is fitted. There is a problem that the rotational operability is not so good because the joint recess is easily detached from the nut and the grip portion is easily inclined in the axial direction of the nut.
Japanese Patent Laid-Open No. 9-94767

  The present invention has been made under the circumstances described above, and the problem to be solved is that even when it is difficult to use a so-called spectacle wrench, it can be used with good operability equivalent to that of a spectacle wrench. To provide a spanner.

  In order to solve the above-described problem, the spanner according to the present invention forms a pair of left and right sandwiching pieces bifurcated at the tip of the grip portion, and an even number of squares or more between the pair of left and right sandwiching pieces. A recess to which the nut is fitted, and a nut fitting recess that is open from the two sides parallel to each other is formed. It is characterized by protruding from the tip of the piece to the inside of two parallel sides of the nut fitting recess.

  A typical example of the spanner according to the present invention is a spanner that rotates an even-numbered angle nut for fastening a pipe that is screwed into a pipe insertion port of a pipe joint. It is larger than the diameter. More specifically, a spanner in which an octagon nut is formed as a nut fitting recessed portion, and a protrusion for preventing detachment protrudes at an angle of 45 ° from the tip of a pair of left and right clamping pieces to the inside. Alternatively, the wrench is a wrench in which a hexagon nut is fitted as a nut fitting recess, and a protrusion for preventing detachment is projected inward from the tip of the pair of left and right clamping pieces at an angle of 60 °.

  Further, another spanner of the present invention forms a pair of left and right sandwiching pieces bifurcated at the tip of the grip part, and an even-numbered square nut or more is fitted between the pair of left and right sandwiching pieces. A nut-engaging recess that is a recessed portion to be joined and that is open at the end of two parallel sides is formed, and a detachment prevention protrusion that engages with the side surface of the even-numbered nut is formed from the tip of one clamping piece. It is characterized in that it protrudes to the inside of one of the two parallel sides of the fitting recess.

  When the spanner according to the present invention is moved in the axial direction of the nut and the nut fitting recess is fitted to the nut, it protrudes from the tip of the pair of left and right clamping pieces to the inside of two parallel sides of the nut fitting recess. Since the detachment prevention protrusion engages with the side surface of the nut, the nut fitting recess does not come off the side of the nut, and the wrench prevention protrusion engages the spanner grip in the axial direction of the nut. Since it becomes difficult to tilt and is held in a direction substantially perpendicular to the axial direction, the nut can be rotated with the same excellent rotational operability as a so-called spectacle wrench.

  And, as a spanner for rotating a pipe tightening and fixing nut screwed into a pipe connection port of a pipe joint, the distance between protrusions for preventing disengagement is larger than the outer diameter of the pipe. The pipe can be loosely fitted in the nut fitting recess, and the spanner can be moved in the axial direction of the nut (pipe) so that the nut fitting recess can be fitted to the pipe tightening fixing nut. Even a nut for fixing a pipe tightening that cannot be rotated can be rotated with good operability.

  In addition, the other spanner according to the present invention merely has the protrusion for preventing detachment that engages the side surface of the nut so as to protrude inward from the tip of one clamping piece, so that the grip portion is in the axial direction of the nut. Although it is easier to tilt, the nut fitting recess can be prevented from coming off from the nut side by this one detachment prevention projection, so that the rotational operability is improved.

  More specifically, the spanner according to the present invention is a spanner in which, as described above, a nut fitting recess for fitting an octagon nut is formed, and a protrusion for preventing detachment is projected inward at an angle of 45 °. Or a wrench that forms a nut fitting recess for fitting a hex nut and has a protrusion for preventing detachment projecting inward at an angle of 60 °, but the spanner of the present invention is not limited to these, For example, a nut fitting recess that fits a square nut is formed, and a wrench that protrudes at an angle of 90 ° inwardly from a detachment prevention projection or a nut fitting recess that fits a hex nut is removed. All spanners with nut-engaging recesses for fitting even-numbered angle nuts and projections for preventing disengagement at the corresponding angles, such as spanners with prevention projections projecting inward at an angle of 36 ° Is included.

  Hereinafter, specific embodiments of the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a perspective view of a spanner according to an embodiment of the present invention, FIG. 2 is a plan view of the spanner, and FIG. 3 is a perspective view showing an example of use of the spanner.

  The spanner S1 is made of metal, and a pair of left and right substantially arc-shaped sandwiching pieces 2 and 2 branched in a bifurcated manner are formed at the front end of the band plate-like grip 1. A nut fitting recess 3 into which an octagon nut is fitted is formed between the sandwiching pieces 2 and 2, and the two opposite sides 3 a and 3 a of the nut fitting recess 3 which are parallel to each other. The further part is open. Further, as shown in FIG. 2, detachment preventing projections 4 and 4 that engage with the side surface 5a of the octagonal nut 5 fitted in the nut fitting recess 3 are provided at the tips of the sandwiching pieces 2 and 2, respectively. The nut fitting recess 3 protrudes from the two parallel sides 3a, 3a inward at an angle of 45 °.

  As shown in FIG. 3, the spanner S <b> 1 is mainly used when an octagon nut 5 for fastening a pipe that is screwed into a pipe insertion port of a pipe joint 7 that connects the pipe 6 is rotated. Therefore, as shown in FIG. 2, the mutual interval W between the prevention protrusions 4, 4 is set larger than the outer diameter D of the pipe 6, and the pipe 6 passes through the mutual space of the prevention protrusions 4, 4. The nut fitting recess 3 can be loosely fitted. The distance W between the protrusions 4 and 4 is preferably set to be slightly larger than the outer diameter D of the pipe 6. If so, the protrusion dimensions of the protrusions 4 and 4 are provided. Since the nut holding stability by the nut fitting recess 3 and the detachment preventing projections 4 and 4 is enhanced, there is an advantage that the rotation operability of the holding spanner S1 is further improved.

  Such a spanner S1 can be mass-produced, for example, by punching a thick metal plate into the spanner shape shown in FIG. Of course, it may be manufactured by a mold.

  When rotating the octagonal nut 5 for fixing the pipe tightening of the pipe joint 7 as shown in FIG. 3 using the spanner S1, the nut fitting recess 3 of the spanner S1 is first placed near the octagonal nut 5. The nut 6 is fitted into the octagonal nut 5 by loosely fitting the pipe 6 and moving the spanner S1 in the axial direction of the octagonal nut 5 (pipe 6). When fitted in this way, the detachment prevention protrusions 4, 4 engage with the side surface 5 a of the octagonal nut 5, so that the nut fitting recess 3 does not come off sideways from the octagonal nut 5, and also prevents detachment. By engaging the projections 4 and 4, the holding stability of the octagonal nut 5 is also improved, and the grip portion 1 of the spanner S 1 is difficult to tilt in the axial direction of the octagon nut 5. The vibration is reduced and maintained in a direction substantially perpendicular to the axial direction. Therefore, the spanner S1 firmly holds the octagon nut 5 and rotates the octagon nut 5 for tightening the pipe of the pipe joint 7 that cannot be rotated by the spectacle wrench with the same good operability as the spectacle wrench. Can be made.

  FIG. 4 is a plan view of a spanner according to another embodiment of the present invention.

  The spanner S2 is a nut fitting recess 30 into which a hexagon nut is fitted between a pair of left and right sandwiching pieces 2 and 2 divided into a bifurcated shape at the tip of the grip portion 1, and its two parallel sides 30a. , 30a is formed in the recessed portion 30 opened, and the detachment preventing projections 4, 4 engaged with the side surfaces of the hexagon nut are formed at 60 ° from the tip of the pair of left and right clamping pieces 2, 2 to the inside. The protrusions 4 and 4 are projected at an angle, and the distance between the protrusions 4 and 4 for preventing detachment is set slightly smaller than the outer diameter of the pipe.

  Similar to the spanner S1, the spanner S2 can rotate the hexagon nut for tightening the pipe joint of the pipe joint that cannot be rotated by the spectacle wrench with a good rotational operability comparable to the spectacle wrench. .

  FIG. 5 is a plan view of a spanner according to still another embodiment of the present invention.

  In this spanner S3, a detachment preventing projection 4 that engages with a side surface of an octagonal nut is projected from the tip of one clamping piece 2 to the inside of one side 3a of two parallel sides of the nut fitting recess 3. It is. Since the other configuration is the same as that of the spanner S1 described above, the same members in FIG.

  Such a spanner S3 has a single protrusion 4 for preventing detachment. Therefore, the holding stability of the nut is slightly lowered compared to the two wrench S1 having the above-described protrusion for preventing detachment. However, it is possible to sufficiently prevent the nut fitting recess 3 from coming off from the nut to the side by this one detachment preventing projection 4, so that the rotational operability is improved.

It is a perspective view of the spanner concerning one embodiment of the present invention. It is a top view of the spanner. It is a perspective view which shows the usage example of the spanner. It is a top view of the spanner concerning other embodiments of the present invention. It is a top view of the spanner concerning other embodiment of the present invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Grip part 2 Nipping piece 3,30 Nut fitting recessed part 3a, 30a Two parallel sides of nut fitting recessed part 4 Protrusion for prevention of separation 5 Octagonal nut for pipe fastening fixation 5a Side face of octagonal nut 6 Pipe 7 Pipe joint S1 , S2, S3 Spanner W Interval between protrusions to prevent detachment D Pipe outer diameter

Claims (5)

  A pair of left and right holding pieces bifurcated at the tip of the grip portion is formed, and a recess in which an even number of square nuts are fitted between the left and right set of holding pieces. Form a nut-fitting recess with the part beyond the side open, and connect the protrusions for prevention of engagement that engage with the side surface of the even-numbered angle nut from the tip of the left and right pair of clamping pieces to the two parallel sides of the nut-fitting recess. A spanner that protrudes inward.   A spanner for rotating an even-numbered nut for fastening a pipe that is screwed into a pipe insertion port of a pipe joint, characterized in that the distance between protrusions for preventing disengagement is larger than the outer diameter of the pipe. The spanner according to claim 1.   A recess for fitting an octagonal nut is formed as a nut fitting recess, and a protrusion for preventing detachment is provided at an angle of 45 ° inward from the front end of the pair of left and right clamping pieces. Item 3. The spanner according to item 2.   A recess for fitting a hexagon nut is formed as a nut fitting recess, and a protrusion for preventing detachment is provided projecting inward from the tip of a pair of left and right clamping pieces at an angle of 60 °. Item 3. The spanner according to item 2.   A pair of left and right holding pieces bifurcated at the tip of the grip portion is formed, and a recess in which an even number of square nuts are fitted between the left and right set of holding pieces. Form a nut-fitting recess that is open at the end of the side, and connect the protrusion for preventing disengagement that engages the side surface of the even-numbered angle nut from the tip of one clamping piece to one of the two parallel sides of the nut-fitting recess. A spanner that protrudes to the inside of the side.

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