JP2010185532A - Gap adjustment bolt nut, and gap adjustment tool having the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve the problem in which fine adjustment is not allowed, or a special tool or the like is required for the fine adjustment, causing work difficult, or the like, when attaching two planes with a gap therebetween. <P>SOLUTION: This gap adjustment bolt nut 1 includes a cylindrical body 10 having a ring-like disk head 11 in one end side, is formed with a fixed-directional male screw 100a on the outer circumferential face 10a of the cylindrical body 10, is formed with a female screw 100b reverse-directional to the male screw 100a, on the inner circumferential face 10b, is formed to make a friction coefficient of the female screw 100b on the inner circumferential face 10b higher than a friction coefficient of the male screw 100a on the outer circumferential face 10a, and has a slip-preventive protrusion 12 on a disk surface of the head 10, and the problem is solved by a gap adjustment tool comprising the gap adjustment bolt nut 1, a tightening bolt 2 screwed with the female screw 100b of the gap adjustment bolt nut 1, and a bolt 3 screwed with the male screw 100a of the gap adjustment bolt nut 1. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  In the present invention, when a gap between two flat plates, for example, a bumper spoiler is attached to a bumper of an automobile by adjusting the gap, a gap between two flat plates, for example, a bolt mounting portion of the bumper and a bolt mounting portion of the bumper spoiler is provided. The present invention relates to a gap adjustment bolt nut that can be operated while easily adjusting the gap, and a gap adjustment tool having a gap adjustment bolt nut.

  Conventionally, when a resin bumper spoiler is attached to two flat plates, for example, a resin bumper of an automobile, a circumferential length difference occurs depending on production conditions, and the circumferential length direction (L direction in FIGS. 4A, 9 and 13). A gap of several mm, usually about 1 to 2 mm, is generated. When the gap generating portion is tightened with a bolt, the bumper spoiler is distorted and deformed, and the bumper spoiler is peeled off at the portion where the double-sided tape is attached.

  Therefore, when the bumper spoiler BS is attached to the bumper BM as shown in FIG. 9, the gap nut washer having a certain thickness is attached after the spring nut 101 is attached to the bolt tightening part BM1 of the bumper BM in order to create a gap. It is known that a plurality of, for example, two, 102 are interposed and tightened with bolts 103 (prior art 1).

  Japanese Patent Laid-Open No. 2001-311417 (Prior Art 2) relates to “gap adjustable bolt” and “gap adjusting method using a gap adjustable bolt”, and “a spacer is not necessary and two gaps can be adjusted. Bolts that can be easily fixed with the body being maintained at a desired gap interval, and “a bolt main body in which a right screw and a left screw are vertically cut on the same axis, and an inner screw that can be screwed into the bolt main body are cut. And a gap adjustable bolt comprising a fitting bolt in which an outer screw of a reverse screw is cut on the outer periphery, and after the screw is screwed into a gap adjusting body in which a screw capable of being screwed is formed, Turn the bolt body part that was screwed into the inner screw of the fitting bolt, or screw it into the gap adjustment body to which the nut with flange or spring nut is attached so that the bolt can be screwed , There is disclosed a clearance adjustment method "that can be opened freely the distance between the gap adjusting member by turning the bolt body part that has been screwed into internal threads of the fitting bolt.

  The attachment order regarding the prior art 2 is shown in FIGS. As shown in FIG. 10, the prior art 2 has a bolt body 200 in which a left screw 200a and a right screw 200b are cut up and down, an inner screw that can be screwed into the bolt body 200, and the inner screw. It consists of three members: a fitting bolt 201 in which a reverse screw is cut on the outer periphery, and a flanged nut 202 into which the fitting bolt 201 can be screwed. Then, after the left screw 200a of the bolt body 200 and the inner screw 201a of the fitting bolt 201 are screwed together (FIG. 11), the outer screw 201b of the fitting bolt 201 and the inner screw 202b of the flanged nut 202 are screwed together. Further, in this state, the right screw 200b of the bolt body 200 is screwed into a spring nut 203 provided on the bumper BM (FIG. 12). The clearance adjustment is performed by adjusting the screwed state of the bolt body 200 and the spring nut 203 (FIG. 13).

JP 2001-31417 A (Prior Art 2)

  In Prior Art 1, after attaching the spring nut 102 to the bolt tightening part BM1 of the bumper BM, several sheets of gap-filling washers 102 of a certain thickness are attached to the gap with the bolt tightening part BS1 of the bumper spoiler BS. There was a problem that the gap itself was narrow and it was difficult to perform operations such as insertion work. Furthermore, in the prior art 1, since the gap-filling washer 102 having a constant thickness is used, there is a problem that fine adjustment of the gap below the thickness cannot be performed.

  The “gap adjustable bolt and gap adjusting method” shown in the prior art 2 is composed of three members, ie, a bolt main body 200, a fitting bolt 201, and a flange nut 202, and these are further complicated in that the spring nut 203 is screwed together. This is a double structure. Therefore, after attaching these three members to the bumper spoiler BS and further attaching them to the spring nut 203, the clearance adjustment is performed by adjusting the screwed state of the bolt body 200 and the spring nut 203, so the installation work is complicated. In addition, there is a problem that adjustment time is very long because it is attached with a special tool. Furthermore, there has been a problem that the bolt body 200 cannot be securely fixed to the fitting bolt 201.

  In order to solve the above-mentioned problem, a gap adjusting bolt and nut used in a gap adjusting tool for adjusting a gap between two flat plates, comprising a cylindrical body having a ring-shaped disk head on one end side, A male screw in a certain direction is formed on the outer peripheral surface, a female screw in the opposite direction to the male screw is formed on the inner peripheral surface, the friction coefficient of the female screw on the inner peripheral surface is higher than the friction coefficient of the male screw on the outer peripheral surface, and the head A gap adjusting bolt and nut characterized by having a non-slip protrusion on the surface of the disk.

Moreover, it is a gap adjusting tool that adjusts the gap between two flat plates,
It consists of a cylindrical body having a ring-shaped disk head on one end side, a male screw in a certain direction is formed on the outer peripheral surface of the cylindrical body, a female screw in the direction opposite to the male screw is formed on the inner peripheral surface, and the female screw on the inner peripheral surface is formed. A clearance adjustment bolt nut having a friction coefficient higher than the friction coefficient of the male screw on the outer peripheral surface and having a non-slip protrusion on the disk surface of the head;
A tightening bolt screwed into the female screw of the gap adjustment bolt nut,
Proposed is a gap adjusting tool characterized by comprising a nut screwed into a male screw of a gap adjusting bolt nut.

Furthermore, it is a gap adjusting tool for adjusting the gap between two flat plates,
It consists of a cylindrical body having a ring-shaped disk head on one end side, a male screw in a certain direction is formed on the outer peripheral surface of the cylindrical body, a female screw in the direction opposite to the male screw is formed on the inner peripheral surface, and the female screw on the inner peripheral surface is formed. A clearance adjustment bolt nut that has a friction coefficient higher than that of the male screw on the outer peripheral surface and has a non-slip protrusion on the disk surface of the head,
A tightening bolt screwed into the female screw of the gap adjustment bolt nut,
It consists of a nut screwed into the male screw of the gap adjustment bolt nut,
The frictional force generated between the male screw of the tightening bolt and the female screw of the clearance adjustment bolt nut is larger than the frictional force generated between the male screw of the clearance adjustment bolt nut and the female screw of the nut.
The frictional force generated between one flat plate and the anti-slip protrusion on the head of the clearance adjustment bolt nut is greater than the frictional force generated between the male screw of the tightening bolt and the internal screw of the clearance adjustment bolt nut. A gap adjustment tool is proposed.

  According to the present invention, since the gap formed between the two flat plates can be adjusted in a screwed state of the male screw and the female screw, fine adjustment is possible and a non-adjustable gap is generated as in the prior art 1. There is no.

  Furthermore, since the component members are two members, a tightening bolt which is a normal bolt and a gap adjusting bolt and nut, and installation can be performed with a normal screwdriver, there is no need for a special tool and prior art 2 Since the number of members is small and easy to install, the installation work time is greatly reduced.

Front view of gap adjustment bolt nut according to an embodiment of the present invention Same left side view Front view of a tightening bolt screwed into a gap adjusting bolt nut according to an embodiment of the present invention (A) A perspective view of a bumper spoiler to which a gap adjuster according to an embodiment of the present invention is attached, (b) a perspective view of a bumper and a bumper spoiler to which a gap adjuster according to an embodiment of the present invention is attached. Sectional drawing of the state which attached the clearance adjustment bolt nut to the bumper spoiler which is one of the explanatory drawings which shows the attachment operation | work order of the clearance adjustment tool which is embodiment of this invention Sectional drawing of the state which attached the clearance adjustment bolt nut to the bumper spoiler which is one of the explanatory drawings which shows the attachment operation | work order of the clearance adjustment tool which is embodiment of this invention Sectional drawing of the state which attached the clearance adjustment bolt nut to the bumper spoiler which is one of the explanatory drawings which shows the attachment operation | work order of the clearance adjustment tool which is embodiment of this invention Sectional drawing of the state which attached the clearance adjustment bolt nut to the bumper spoiler which is one of the explanatory drawings which shows the attachment operation | work order of the clearance adjustment tool which is embodiment of this invention Explanatory cross-sectional view of gap adjustment tool of prior art 1 Explanatory drawing which shows the attachment order of the adjustable bolt of the prior art 2 Explanatory drawing which shows the attachment order of the adjustable bolt of the prior art 2 Explanatory drawing which shows the attachment order of the adjustable bolt of the prior art 2 Explanatory drawing which shows the attachment order of the adjustable bolt of the prior art 2

  A clearance adjustment bolt nut and a clearance adjustment tool having a clearance adjustment bolt nut according to an embodiment of the present invention will be described with reference to FIGS. 1 to 8.

  A gap adjusting bolt nut according to an embodiment of the present invention is a gap provided between two flat plates, for example, a bolt mounting portion BS1 of a bumper spoiler BS of an automobile as shown in FIGS. 4 (a) and 4 (b), It is used for a gap adjuster that adjusts the gap between the bumper BM and the bolt mounting portion BM1.

  The gap adjusting bolt nut 1 is composed of a cylindrical body 10 having a ring-shaped disk head 11 on one end side, and a male screw 100a in a certain direction is formed on the outer peripheral surface 10a of the cylindrical body 10, and the male screw 100a is formed on the inner peripheral surface 10b. A female screw 100b in the reverse direction is formed. In this embodiment, the male screw 100a formed on the outer peripheral surface 10a is a left bolt screw, and the female screw 100b formed on the inner peripheral surface 10b is a right nut screw.

  The gap adjusting bolt nut 1 has a male screw 10a formed on the outer peripheral surface 10a, and a friction coefficient B of the female screw 100b formed on the inner peripheral surface 10b, that is, a frictional force B between the tightening bolt 2 to which the female screw 100b is screwed. The coefficient of friction, that is, the frictional force C generated between the male screw 10a and the spring nut 3 is formed.

  The head 11 of the gap adjusting bolt nut 1 is formed by punching the center of a disk having a constant thickness in the same circular shape as the inner diameter of the cylindrical body 10, and has a non-slip projection 12 and a driver groove 13 on the outer surface of the disk. Have The shape and number of the non-slip projections 12 are not limited as long as they are formed as a plurality of projections. However, the friction generated between the anti-slip projections 12 and the bolt mounting portion BS1 of the bumper spoiler BS, which is a flat plate with which the head 11 comes into contact. Any shape and number may be used so that the force A is larger than the frictional force B generated between the tightening bolt 2 and the female screw 100b of the gap adjusting bolt nut 1.

  The clearance adjustment tool having the clearance adjustment bolt nut 1 according to the embodiment of the present invention includes the clearance adjustment bolt nut 1 described above, the tightening bolt 2 that can be screwed into the female screw 100b of the clearance adjustment bolt nut 1, and the clearance. It consists of a spring nut 3 that can be screwed into the male screw 100a of the adjusting bolt nut 1. Note that other nuts can be used instead of the spring nut 3.

  The fastening bolt 2 is a bolt that is generally sold and used as shown in FIG. 3, and has a bolt portion 20 having a male screw formed on the outer periphery and a plus or minus screwdriver groove (not shown). It consists of a head 21. The tightening bolt 2 is rotated by a screwdriver inserted into a driver groove formed in the head.

  The mounting order of the clearance adjustment bolt nut and the clearance adjustment bolt having the clearance adjustment bolt nut according to the embodiment of the present invention will be described with reference to FIGS.

  The clearance adjuster is attached to adjust a clearance formed between two flat plates, for example, a clearance between a bolt mounting portion BS of a bumper spoiler BS of an automobile and a bolt mounting portion B1 of a bumper B. First, the spring nut 3 is attached to the bolt attachment portion B1 of the bumper B as shown in FIG. The spring nut 3 is attached with the nut hole aligned with the bolt hole formed in the bolt mounting portion B1 of the bumper B.

  The male screw 100a of the gap adjusting bolt nut 1 is screwed into the nut hole of the spring nut 3. At this time, since the male screw 100a of the gap adjusting bolt nut 1 and the female screw of the spring nut 3 are cut in the same direction, in this embodiment, a left-hand screw, it is tightened by turning counterclockwise to the state shown in FIG.

  Next, as shown in FIG. 6, in order to attach the bumper spoiler BS to the outside (lower part) of the bumper B, the bolt mounting portion BS1 of the bumper spoiler BS is aligned with the bolt mounting portion B1 of the bumper B, and the tightening bolt 2 is set to the bumper spoiler BS. From the outside of the bolt mounting portion BS1, the bolt hole of the bolt mounting portion BS1 is passed through, and further inserted into the female screw 100b of the gap adjusting bolt nut 1. The male screw 100b of the tightening bolt 2 and the female screw 100b of the clearance adjustment bolt nut 1 are screws formed in the same direction, and are right-hand screws in this embodiment.

  When the male screw of the tightening bolt 2 which is a right screw and the female screw 100b of the gap adjusting bolt nut 1 are screwed together, the frictional force B generated by this screwing is generated by the male screw 100a and the spring nut of the gap adjusting bolt nut 1 screwed by the left screw. It is larger than the frictional force C of the female screw 3. Therefore, when the tightening bolt 2 is turned clockwise with a screwdriver or the like, the male screw of the tightening bolt 2 and the female screw 100b of the clearance adjustment bolt nut 1 rotate together, and the clearance adjustment bolt nut 1 also rotates to the right. The male screw 100a of the gap adjusting bolt nut 2 is rotated clockwise with respect to the female screw of the spring nut 3 that is screwed together to loosen the tightening. Then, as shown in FIG. 7, the gap adjusting bolt nut 1 gradually extends from the bolt mounting portion B1 of the bumper B toward the bolt mounting portion BS1 of the bumper spoiler BS while rotating the head 11 clockwise, and the bumper spoiler BS. In contact with the plate surface at the correct position of the bolt mounting portion BS1.

  When the outer surface of the head 11 of the gap adjusting bolt nut 1 contacts the plate surface of the bolt mounting portion BS1 of the bumper spoiler BS, friction is caused between the head 11 and the bolt mounting portion BS1 of the bumper spoiler BS by the anti-slip protrusion 12. Force A is generated. This frictional force A is larger than the frictional force B generated between the tightening bolt 2 and the female screw 100b of the gap adjusting bolt nut 1. Therefore, when the driver is further rotated clockwise, the clearance adjustment bolt nut 1 stops rotating due to the frictional force A generated between the head 11 and the bolt mounting portion BS1 of the bumper spoiler BS, and the tightening bolt 2 becomes the clearance adjustment bolt. When the tightening bolt 2 is tightened to the end by being screwed into the female screw 100b of the nut 1 by rotating clockwise, the female screw 100b of the gap adjusting bolt nut 1 and the bolt mounting portion BS1 of the bumper spoiler BS are sandwiched and stopped. Accordingly, the bolt mounting portion BS1 of the bumper spoiler BS is mounted with a regulated clearance from the bolt mounting portion BM1 of the bumper BM.

  The above three frictional forces A, B, and C are summarized as follows. Friction force A = Friction force generated by contact between the outer surface of the head 11 of the gap adjusting bolt nut 1 (slip prevention protrusion 12) and the plate surface of the bolt mounting portion BS1 of the bumper spoiler BS, friction force B = clamping bolt 2 and the frictional force generated between the female screw 100 b of the gap adjusting bolt nut 1, the frictional force C = the frictional force of the male screw 100 a of the gap adjusting bolt nut 1 and the female screw of the spring nut 3.

And the comparison of the magnitude | size of three frictional forces A, B, and C is as follows.

  Friction force A> Friction force B> Friction force C

  Furthermore, in order to change and adjust the frictional force (B, C) generated between the male screw and the female screw, a combination in which a female thread is not formed on the inner peripheral surface and the bolt side screwed with this is a self-tapping bolt, It is conceivable to apply Loctite to the internal thread on the inner peripheral surface.

  The present invention is used when a bumper spoiler is mounted on a bumper of an automobile by adjusting a gap between two flat plates, that is, by adjusting a gap between the two flat plates.

1 Clearance adjustment bolt nut 10 Cylindrical body
10a outer peripheral surface
100a Male thread
10b Inner peripheral surface
100b Female screw 11 Head 12 Non-slip projection 13 Driver groove
2 Tightening bolt 20 Bolt 21 Head 3 Spring nut BM Bumper BM1 Bumper bolt mounting part BS Bumper spoiler BS1 Bumper spoiler bolt mounting part

Claims (3)

  A clearance adjustment bolt and nut used in a clearance adjustment tool that adjusts the clearance between two flat plates. The clearance adjustment bolt and nut is composed of a cylindrical body having a ring-shaped disk head on one end, and a fixed-direction male screw is provided on the outer peripheral surface of the cylindrical body. In addition to forming a female screw in the opposite direction to the male screw on the inner peripheral surface, the friction coefficient of the female screw on the inner peripheral surface is made higher than the friction coefficient of the male screw on the outer peripheral surface, and a non-slip protrusion on the disk surface of the head A gap adjusting bolt and nut characterized by comprising: It is a gap adjuster that adjusts the gap between two flat plates,
It consists of a cylindrical body having a ring-shaped disk head on one end side, a male screw in a certain direction is formed on the outer peripheral surface of the cylindrical body, a female screw in the direction opposite to the male screw is formed on the inner peripheral surface, and the female screw on the inner peripheral surface is formed. A clearance adjustment bolt nut that has a friction coefficient higher than that of the male screw on the outer peripheral surface and has a non-slip protrusion on the disk surface of the head,
A tightening bolt screwed into the female screw of the gap adjustment bolt nut,
A gap adjusting tool comprising a nut screwed into a male screw of a gap adjusting bolt nut. It is a gap adjuster that adjusts the gap between two flat plates,
It consists of a cylindrical body having a ring-shaped disk head on one end side, a male screw in a certain direction is formed on the outer peripheral surface of the cylindrical body, a female screw in the direction opposite to the male screw is formed on the inner peripheral surface, and the female screw on the inner peripheral surface is formed. A clearance adjustment bolt nut that has a friction coefficient higher than that of the male screw on the outer peripheral surface and has a non-slip protrusion on the disk surface of the head,
A tightening bolt screwed into the female screw of the gap adjustment bolt nut,
It consists of a nut screwed into the male screw of the gap adjustment bolt nut,
The frictional force generated between the male screw of the tightening bolt and the female screw of the clearance adjustment bolt nut is larger than the frictional force generated between the male screw of the clearance adjustment bolt nut and the female screw of the nut.
The frictional force generated between one flat plate and the anti-slip protrusion on the head of the clearance adjustment bolt nut is greater than the frictional force generated between the male screw of the tightening bolt and the internal screw of the clearance adjustment bolt nut. Gap adjustment tool.

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