JP2009181944A - Fixing structure of flange - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enable a flange (a flat plate part of a terminal) to be easily peeled off a body without detaching a bolt and a nut. <P>SOLUTION: In a fixing structure of the flange to pinch the flange 11 between the nut 5 and the surface of the body 1 wherein a shaft part 4a of the stud bolt 4 erected on the body 1 is inserted through a through-hole 12 formed in the flange (flat plate part) 11 of the terminal 10, and the nut 5 is tightened toward the body 1 from above the flange 11, a recess 3 which is smaller than the outer shape of the flange 11 and into which the nut 5 can be dropped is provided at a location on the surface of the body 1 which the flange 11 can hide; a part 11A on the inner periphery side of the recess 3 on the flange 11 is broken by a shearing action of the periphery edge of the recess 3 by strongly tightening the nut 5 at disassembly, and the part 11A is dropped into the recess 3 with the nut 5, whereby the terminal 10 can be peeled off using a hole thus formed. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a flange fixing structure applied when a flat plate portion (flange) at the tip of a terminal is screwed to a vehicle body or when a mounting flange of a vehicle body mounting component is screwed to a vehicle body. .

  For example, a ground terminal in an automobile is generally fixed to a body with a bolt or a nut in order to provide grounding reliability. The LA terminal often used as a ground terminal has an electric wire connecting part for connecting an electric wire for grounding at the base end, a circular flat plate flange at the tip, and an insertion hole for passing a bolt through the center of the flange It is what has.

  When fixing this grounding terminal to the body, a nut is usually welded to the back of the fixing hole of the body, so the screw shaft part of the bolt passed through the bolt insertion hole of the flange is screwed and fastened to the nut. Thus, the ground terminal is fixed to the body by sandwiching a flange between the head of the bolt and the surface of the body.

  If a stud bolt is projected in advance on the body side, the nut is screwed into the stud bolt from above the flange through the bolt insertion hole of the flange. The ground terminal is fixed to the body with the flange in between.

  If the grounding terminal is fixed to the body using bolts and nuts in this way, the bolts and nuts must be operated with a tool such as a spanner or wrench when installing or removing the grounding terminal. It is troublesome. In particular, when removing the ground terminal when the vehicle is disassembled, the ground terminal cannot be removed from the body unless the bolts and nuts are completely removed.

  Therefore, a ground terminal is provided in consideration of ease of disassembly (see, for example, Patent Document 1).

  FIG. 7 shows a ground terminal described in Patent Document 1. The ground terminal 110 has a wire connecting portion 115 at the proximal end, a circular flat plate-shaped flange (flat plate portion) 111 at the distal end, and a bolt insertion hole 112 at the center of the flange 111. A weak portion 113 such as a slit or a groove is formed along the outer peripheral shape of the nut 120 screwed to the nut 120, and the wire connected to the wire connection portion 115 is strongly pulled up with the flange 111 fastened to the body with the nut 120. As a result, the outer peripheral portion 111B of the weak portion 113 is separated from the inner peripheral portion 111A pressed by the nut 120, and the ground terminal 110 can be peeled off from the body without removing the nut 120. Yes.

  Further, FIG. 8 shows a flange mounting structure for mounting a vehicle body mounting component to the body described in Patent Document 2. In this mounting structure, the mounting flange 170 is placed on the fixing hole 153 of the body 151 with the fracture bracket 160 overlaid thereon. Then, the shaft portion of the bolt 180 is passed through the bolt insertion holes 171 and 161 of the flange 170 and the breaking bracket 160, and the tip of the bolt 180 is passed through the fixing hole 153 of the body 151, so that the nut 152 on the back surface of the body 151 is passed. The flange 170 is fixed to the body 151 by screwing to the body 151. In addition, in this state, the wedge protrusion 165 formed on the breaking bracket 160 is engaged with the V groove 175 formed on the flange 170.

When disassembling this mounting structure, the flange 170 is strongly struck from above a portion where the V-groove 175 is present, and an impact force is applied, and the wedge 170 is wedged by the wedge protrusion 165 to break the flange 170 at the position of the V-groove 175. Thereby, the part connected to the base end side of the flange 170 can be removed without removing the bolt 180.
JP 2002-231334 A JP 2007-290435 A

  By the way, in the conventional terminal fixing structure shown in FIG. 7, by strongly pulling up the electric wire connected to the electric wire connecting portion 115, the outer peripheral side portion 111 </ b> B of the weak portion 113 is pressed by the nut 120. Since it is necessary to separate from the side portion 111A, there is a problem that the electric wire must be lifted with a considerably strong force. In addition, when the flange 111 does not break at the target position, it is necessary to remove the flange 120 after removing the nut 120, which makes the work difficult and may cause another discarded part such as a nut. .

  Further, the conventional flange mounting structure shown in FIG. 8 has a problem that the structure is complicated and the cost is high because an extra part called a breaking bracket needs to be provided.

  In consideration of the above circumstances, the present invention allows the flange to be easily peeled off from the body at the time of disassembly without removing the bolts and nuts, and can be easily realized without cost. The purpose is to provide a structure.

  According to the first aspect of the present invention, the shaft portion of the bolt is passed through the insertion hole formed in the flange, and the bolt or a nut screwed to the shaft portion of the bolt is tightened toward the attachment target member, thereby the flange. Is fixed between the head of the bolt or the nut and the surface of the attachment target member, and the outer shape of the flange is positioned at a position hidden by the flange on the surface of the attachment target member. And a recess capable of dropping the head of the bolt or the nut is provided.

  A second aspect of the invention is the flange fixing structure according to the first aspect, wherein the flange is provided with a weak portion along a peripheral edge of the recess.

  A third aspect of the present invention is the flange fixing structure according to the first or second aspect, wherein the flange is a flat plate portion at a distal end of a terminal having a wire connecting portion at a proximal end.

  A fourth aspect of the invention is the flange fixing structure according to the first or second aspect, wherein the flange is a mounting flange provided in a vehicle body mounting component.

  According to the first aspect of the present invention, when the flange is fixed, the bolt shaft portion is passed through the insertion hole formed in the flange as usual, and the bolt or the nut screwed to the bolt shaft portion is directed to the attachment target member. By tightening, the flange can be fixed by being sandwiched between the head or nut of the bolt and the surface of the attachment target member. At this time, since the flange is formed larger than the recess, the flange rides on the surface of the attachment target member around the recess, so that the flange can be securely fixed to the attachment target member.

  Further, at the time of disassembly, the head or nut of the bolt that rides on the flange is further tightened excessively. Then, due to the shear effect by the periphery of the recess, the inner portion of the recess on the flange is broken from the outer portion of the recess and falls into the recess together with the bolt head or nut. Accordingly, a hole larger than the head or nut of the bolt is opened in the flange, and the flange can be easily peeled off from the attachment target member without removing the bolt or nut through the hole. If you use bolts and nuts to tighten the bolts and nuts in particular, you can break the inner part of the recess on the flange without applying force, and remove the flange from the mounting target member in a short time. Can do. Further, since the bolts and nuts remain on the attachment target member side in a state of being embedded in the recesses of the attachment target member, unnecessary waste parts are not generated and the processing effort is not increased. Further, in terms of configuration, since a recess is newly provided on the attachment target member side, it is possible to carry out easily and at low cost.

  According to the invention of claim 2, since the flange is provided with the weak portion, the flange can be more easily broken at the position of the peripheral edge of the recess, and the tightening force of the bolt or nut at the time of disassembly is set to be weak. However, the flange can be peeled off more easily. As the weak part, for example, a circular dotted slit or a shallow groove can be provided.

  According to the invention of claim 3, since it is applied to the screw fixing structure of the flat plate portion at the tip of the terminal for grounding or the like, the terminal of the bolt can be tightened somewhat strongly even if the wire is not pulled strongly. Can be easily peeled off from the member to be attached.

  According to the invention of claim 4, since it is applied to the fixing structure of the mounting flange of the vehicle body mounting part, the part can be easily removed from the mounting target member by simply screwing the bolt head or the nut somewhat strongly without lifting the part strongly. Can be peeled off.

  Hereinafter, an embodiment in which the present invention is applied to a structure for fixing a screw for grounding to a body will be described with reference to the drawings.

<First Embodiment>
1 to 3 are views showing a fixing structure for fixing a terminal flange to a body of a terminal according to a first embodiment, FIG. 1 is a side sectional view showing a state before fixing, and FIG. 2 is a side showing a fixed state. Sectional drawing and FIG. 3 are side sectional views showing a state during dismantling.

  The terminal 10 has a circular flat plate-shaped flange (flat plate portion) 11 at the distal end, has a wire fixing portion 15 for connecting the distal end conductor 19 of the grounding electric wire 18 at the proximal end, and the center of the flange 11. Has a bolt insertion hole 12.

  A stud bolt 4 is erected on the attachment portion 2 on the body 1 side, which is a member to be attached, and a bolt insertion hole 12 of the flange 11 is fitted to the shaft portion 4a of the stud bolt 4, and a nut is formed thereon. 5 can be fastened to the shaft portion 4 a of the stud bolt 4.

  A circular recess 3 is provided on the surface of the body 1 around the shaft portion 4 a of the stud bolt 4 so as to be hidden under the flange 11 when the flange 11 is fitted to the stud bolt 4. Yes. The recess 3 is as small as possible than the outer diameter of the flange 11 and slightly larger than the outer diameter of the nut 5, and is formed in a size that allows the nut 5 to be dropped.

  The depth of the recess 3 is required to be at least the thickness of the flange 11, but it is not necessary to deepen the nut 5 until the nut 5 is completely buried and the nut 5 cannot be turned. As shown in FIG. 3, when the nut 5 is dropped into the recess 3 while cutting off the inner peripheral portion 11A of the flange 11, the optimum depth is applied to the exposed portion of the nut 5 until the end. It is desirable that the cost can be secured sufficiently.

  Further, the flange 11 is provided with a weak portion (not shown) along the periphery of the recess 3. As this weak part, it is preferable to provide a dotted line-like circular slit or groove as in the conventional example of FIG.

  In this configuration, when the terminal 10 is fixed to the body 1, the bolt insertion hole 12 of the flange 11 is fitted to the shaft portion 4a of the stud bolt 4 as usual, and in this state, as shown in FIG. From above, a nut is screwed onto the shaft portion 4a of the stud bolt and tightened toward the body 1. By doing so, the flange 11 can be fixed by being sandwiched between the nut 5 and the surface of the body 1. At this time, since the flange 11 is formed larger than the recess 3, the flange 11 is placed on the surface of the body 1 around the recess 3, so that the flange 11 can be securely fixed to the body 1. The terminal 10 can be securely attached to the body 1.

  From this state, when it becomes necessary to remove the terminal 10 along with the dismantling of the vehicle body, the nut 5 on the flange 11 is further tightened excessively. Then, as shown in FIG. 3, due to the shearing effect by the peripheral edge of the recess 3, the inner peripheral side portion 11 </ b> A of the recess 3 on the flange 11 is broken from the outer portion of the recess 3, and together with the nut 5. It falls into the recess 3. At this time, since the flange 11 has a weak part along the periphery of the recess 3, the flange 11 can be easily broken at the position of the periphery of the recess 3.

  Therefore, by breaking the inner portion 11A of the recess 3 on the flange 11, a hole larger than the nut 5 is opened in the flange 11, and the flange 11 can be easily removed from the body 1 without removing the nut 5 through the hole. Can be peeled off. In particular, if the nut 5 is tightened using an electric tool, the flange 11 can be removed in a short time. Therefore, the terminal 10 can be easily peeled off from the body 1 without strongly pulling up the electric wire 18.

  Further, since the nut 5 can be left on the body 1 side in a state of being embedded in the recess 3 of the body 1, no extra waste parts are generated and the processing effort is not increased. Further, in terms of configuration, since the recess 3 is newly provided on the body 1 side, it can be implemented easily and at low cost.

Second Embodiment
In the first embodiment, the case where the stud bolt 4 is erected on the body 1 side and the terminal 10 is fixed by screwing the nut 5 to the stud bolt 4 has been described. As shown in the second embodiment, the present invention can also be applied to the case where the screw hole 6 is provided on the body 1 side and the terminal 10 is fixed by screwing a bolt 7 into the screw hole 6.

  In this case, a screw hole 6 is formed in the attachment portion 2 on the body 1 side which is a member to be attached, and the screw hole 6 is fastened to the shaft portion 7a of the bolt 7 that is passed through the bolt insertion hole 12 of the flange 11. It can be done. The screw hole 6 may be formed directly in the body 1, but when the body 1 is made of a panel as shown in FIG. 8, a nut is welded to the back of the fixing hole of the body 1 and attached. You may utilize the screw hole of a nut.

  A circular recess 3 is provided around the screw hole 6 on the surface of the body 1 so as to be hidden under the flange 11 when the flange 11 is attached. The recess 3 is as small as possible as the outer diameter of the flange 11 and slightly larger than the outer diameter of the head 7b of the bolt 7, and is formed so as to be able to drop the head 7b of the bolt 7. ing.

  The depth of the recess 3 needs to be at least the thickness of the flange 11, but it is not necessary to deepen the bolt 7 until the head 7 b of the bolt 7 is completely buried and the bolt 7 cannot be turned. As shown in FIG. 6, when the head 7b of the bolt 7 is dropped into the recess 3 while cutting off the inner peripheral portion 11A of the flange 11, as shown in FIG. It is desirable that the tool can be sufficiently secured for the exposed portion. For example, when a hexagon socket head cap screw is used, the recess 3 may be set to a depth at which the head of the bolt is completely buried.

  Further, the flange 11 is provided with a weak portion (not shown) along the periphery of the recess 3. As this weak part, it is preferable to provide a dotted line-like circular slit or groove as in the conventional example of FIG.

  In this configuration, when the terminal 10 is fixed to the body 1, the bolt insertion hole 12 of the flange 11 is passed through the shaft portion 7a of the flange 11 as usual, and the tip of the bolt 7 is connected to the body 1 as shown in FIG. Are screwed into the screw holes 6 and tightened toward the body 1. By doing so, the flange 11 can be fixed by being sandwiched between the head 7 b of the bolt 7 and the surface of the body 1. At this time, since the flange 11 is formed larger than the recess 3, the flange 11 is placed on the surface of the body 1 around the recess 3, so that the flange 11 can be securely fixed to the body 1. The terminal 10 can be securely attached to the body 1.

  From this state, when it becomes necessary to remove the terminal 10 along with the dismantling of the vehicle body or the like, the bolt 7 on the flange 11 is further tightened excessively. Then, as shown in FIG. 6, due to the shear effect by the peripheral edge of the recess 3, the inner portion 11A of the recess 3 on the flange 11 is broken from the outer portion of the recess 3, and the head 7b of the bolt 7 It falls into the recess 3 together. At this time, since the flange 11 has a weak part along the periphery of the recess 3, the flange 11 can be easily broken at the position of the periphery of the recess 3.

  Therefore, by breaking the inner peripheral side portion 11A of the recess 3 on the flange 11, a hole larger than the head 7b of the bolt 7 is opened in the flange 11, and the flange 7 can be formed without removing the bolt 7 through the hole. 11 can be easily peeled off from the body 1. In particular, if the bolt 7 is tightened using an electric tool, the flange 11 can be removed in a short time. Therefore, the terminal 10 can be easily peeled off from the body 1 without strongly pulling up the electric wire 18.

  Further, since the bolt 7 can be left on the body 1 side with the head portion 7b buried in the recess 3 on the body 1 side, unnecessary waste parts are not generated and the processing effort is not increased. Further, in terms of configuration, since the recess 3 is newly provided on the body 1 side, it can be implemented easily and at low cost.

  In the above embodiment, the case where the present invention is applied to the screw fixing structure of the terminal is shown. However, as shown in FIG. Of course, it can also be applied to the case of fixing. In that case, even if the part is not pulled up strongly, the part can be easily peeled off from the body simply by screwing the head or nut of the bolt somewhat strongly. Moreover, although the weak part along the periphery of a recess was provided in the flange, the weak part along the periphery of a nut may be sufficient.

It is a sectional side view which shows the state before fixation in the fixing structure of 1st Embodiment of this invention. It is a sectional side view which shows the state after the fixation in the fixing structure. It is a sectional side view which shows the state at the time of the disassembly of the fixed structure. It is a sectional side view which shows the state before fixation in the fixing structure of 2nd Embodiment of this invention. It is a sectional side view which shows the state after the fixation in the fixing structure. It is a sectional side view which shows the state at the time of the disassembly of the fixed structure. It is a figure which shows the conventional terminal fixing structure, (a) is a top view of a terminal, (b) is a top view of the nut which is a fixing member of a terminal, (c) is a top view which shows the relationship between a terminal and a nut. . It is sectional drawing which shows the fixation structure of the conventional attachment flange of components.

Explanation of symbols

1 Body (member to be mounted)
2 Mounting portion 3 Recessed portion 4 Stud bolt 4b Shaft portion 5 Nut 6 Screw hole 7 Bolt 7a Shaft portion 7b Head portion 10 Terminal 11 Flange 12 Bolt insertion hole 15 Electric wire connecting portion 18 Electric wire

Claims (4)

A bolt shaft portion is passed through an insertion hole formed in the flange, and the bolt or a nut screwed to the bolt shaft portion is tightened toward an attachment target member, whereby the flange is connected to the head portion of the bolt. Or in the fixing structure of the flange fixed between the nut and the surface of the mounting target member,
A flange fixing structure characterized in that a recess that is smaller than the outer shape of the flange and into which a bolt head or the nut can be dropped is provided at a position hidden by the flange on the surface of the attachment target member. The flange fixing structure according to claim 1,
A flange fixing structure, wherein the flange is provided with a weak portion along a peripheral edge of the recess. The flange fixing structure according to claim 1 or 2,
The flange fixing structure, wherein the flange is a flat plate portion at a distal end of a terminal having a wire connecting portion at a proximal end. The flange fixing structure according to claim 1 or 2,
A flange fixing structure, wherein the flange is an attachment flange provided in a vehicle body attachment component.

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