JP4036557B2 - Clamp lock mechanism - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a lock mechanism for a clamp that is attached to an attachment portion while holding a fuel pipe or the like of an automobile.
[0002]
[Prior art]
A clamp is used for attaching a fuel pipe or the like to a predetermined position on a body panel of an automobile, and it can be fitted into a stud bolt protruding from the panel while holding the fuel pipe.
[0003]
As shown in FIGS. 5 and 6, the clamp 100 includes a clamp body 102 that is fixed to the panel side, and a clamp piece 106 that holds the fuel pipe 104 between the clamp body 102. . The clamp body 102 is provided with a shaft portion 108, and an arm portion 107 of the clamp piece 106 is rotatably connected.
[0004]
In addition, an engagement claw 110 is formed in the clamp main body 102, and a claw portion 112 provided on the free end side of the clamp piece 106 can be engaged with the engagement claw 110.
[0005]
With such a configuration, the clamp body 102 and the clamp piece 106 are locked in a state where the fuel pipe 104 is held between the elastic members 105.
[0006]
However, when the clamp 100 holding the fuel pipe 104 is attached to the attachment portion of the body panel, the clamp piece 106 is pulled in the direction of arrow A, a force in the direction of arrow B is generated in the claw portion 112, and the claw portion 112 is engaged. In some cases, the nail 110 slips off and comes off. Further, when the outer dimension of the fuel pipe 104 is large, the claw portion 112 may come off from the engaging claw 110 due to vibration, impact, or the like of the automobile.
[0007]
[Problems to be solved by the invention]
In view of the above facts, an object of the present invention is to provide a lock mechanism for a clamp that is difficult to come off.
[0008]
[Means for Solving the Problems]
The invention described in claim 1 is a clamp locking mechanism that holds and holds a clamped body between one clamp portion and the other clamp portion that are fixed to the mounting portion and rotatably connected by a hinge portion. An engagement portion formed with an engagement surface that is formed in one clamp portion and is obliquely cut from the tip portion to the base portion, and the other clamp portion is substantially U-shaped, An engaged portion formed on an outer surface of a free end portion of the other clamp portion and formed with an engaged surface that is obliquely cut from a distal end portion to a base portion and engages with the engaging surface; A force is applied to the other clamp portion in a state where the contact portion formed at the base portion of the engaged portion and the one clamp portion are engaged with the engagement surface and the engaged surface. A lock portion that receives the contact portion with the surface by a force acting on the engaged portion in parallel with the engagement surface. And wherein the door.
In the first aspect of the present invention, an engaging portion is formed in one clamp portion that is rotatably connected to the other clamp portion by the hinge portion. The engaging surface is formed with an engaging surface that is cut obliquely from the tip to the base.
[0009]
Moreover, the other clamp part has comprised substantially U shape, and the to-be-engaged part is formed in the outer surface of the free end part of the other clamp part . Then, this is engaged portion, the engagement surface is formed to be engaged with the engagement surface are cut diagonally across the base from the tip portion.
[0010]
On the other hand, one clamp part is formed with a lock part, and when a force is applied to the other clamp part in a state where the engaging surface and the engaged surface are engaged, the clamped part is parallel to the engaging surface. The contact portion is received by the surface by the force acting on the engagement portion.
[0011]
For this reason, for example, when the clamp holding the fuel pipe is attached to the attachment portion, the engaged portion is disengaged from the engagement portion even if the other clamp portion is pulled and a force acting in parallel with the engagement surface is generated. There is no. Even if the outer dimension of the fuel pipe is large, the engaged portion does not come off the engaging portion due to vibration, impact, or the like.
[0012]
In the invention according to claim 2, the other clamp part is a flexible piece, and this flexible piece is elastically deformed inward when the engaged part slides along the opposite surface of the engaging surface, and is engaged. When the tip of the part is exceeded, the elastic surface is restored, and the engaging surface and the engaged surface are engaged.
[0013]
For this reason, when the engaging surface and the engaged surface are engaged, a click feeling is obtained, and it is immediately known whether or not the engaging surface is engaged.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
The clamp 10 which concerns on this form is shown by FIGS. 1-3. The clamp 10 includes a holding portion 20 into which a hydraulic control system pipe 18 such as a brake is fitted, a fitting portion 16 to be fitted with a stud bolt 14 protruding from a body panel 12 of an automobile, and a clamp portion to hold a fuel pipe 24. 22 are connected in series.
[0015]
An arcuate holding table 30 is formed in the holding unit 20 according to the outer diameter of the pipe 18. Each of the holding bases 30 is provided with a support wall 36, and an elastically deformable guide piece 38 that is bent toward the center of the holding base 30 extends on the support wall 36. A guide wall 34 is formed to face the support wall 36, and the distance between the guide wall 34 and the guide piece 38 is smaller than the diameter of the pipe 18.
[0016]
For this reason, when the pipe 18 passes between the guide piece 38 and the guide wall 34, the guide piece 38 bends and the pipe 18 can pass.
[0017]
Further, the maximum distance between the end 40 of the guide piece 38 and the holding table 30 is substantially the same as the diameter of the pipe 18. For this reason, when the pipe 18 is held on the holding base 30, the guide piece 38 is elastically restored and the end portion 40 presses the pipe 18.
[0018]
Further, ribs 42 are formed on the back surface of the holding table 30 to strengthen the holding unit 20.
[0019]
On the other hand, the fitting portion 16 has a box shape having an opening 43 on the side wall, and a hole portion 48 through which the stud bolt 14 can be inserted is formed in the bottom portion 46. A pair of guide pieces 51 protrude from the hole 48 toward the upper inner side, and guide the inserted stud bolt 14 to a retaining piece 52 described later.
[0020]
On the inner wall 44 of the fitting portion 16, a pair of retaining pieces 52 are projected in two places at the top and bottom, and the front end portion 52 </ b> A is horizontal. The upper and lower separation distance of the retaining piece 52 is matched to the thread pitch of the stud bolt 14. Therefore, the tip 52A of the retaining piece 52 can bite into the thread groove of the inserted stud bolt 14, and the clamp 10 is not easily detached.
[0021]
Further, an engaging portion 50 described later is provided on the side surface of the fitting portion 16. And in order to prevent sink after molding of engaging part 50, crevice 60 is formed in the back side. Further, in order to prevent the engagement portion 50 from warping after molding, the recess 60 is provided with a cylindrical rib 62 that supports the side wall.
[0022]
On the other hand, the clamp portion 22 has a U-shape with an opening at the top, and a hole 70 is formed in the bottom 68. An elastic member 66 having a substantially U shape can be attached to the clamp portion 22, and the protruding portion 61 protruding from the bottom surface of the elastic member 66 is inserted into the hole 70 to position the elastic member 66. .
[0023]
Further, a stopper 73 is erected from the end portion of the bottom portion 68 so that the elastic member 66 does not come off even if the elastic member 66 is pulled in the longitudinal direction.
[0024]
Further, a protrusion 72 is provided on the inner wall 64 of the clamp part 22. The outer wall 74 of the elastic member 66 is formed with a long groove 76 that can be engaged with the protrusion 72. For this reason, even if the elastic member 66 is pulled upward in a state in which the elastic member 66 is attached to the clamp portion 22, it is not easily detached.
[0025]
In addition, a curved piece 78 is formed at the end of the clamp portion 22 and is bent outward in a reverse U-shape. The curvature radius at the back of the curved piece 78 is slightly larger than the radius of the shaft portion 80 formed on the side wall of the U-shaped clamp portion 26.
[0026]
For this reason, when the shaft portion 80 is fitted into the bending piece 78, the shaft portion 80 can be fitted into the back while pushing the bending portion 78 open by simply press-fitting the shaft portion 80 along the inner wall of the bending piece 78. The clamp part 26 is connected to the clamp part 22. Then, the clamp part 26 can be rotated, and the fuel pipe 24 held by the clamp part 22 can be sandwiched and held by the clamp part 26.
[0027]
In the same manner as the clamp part 22, the clamp part 26 is provided with a hole 70 and a protrusion part 72 for mounting the elastic member 66, and a reinforcing rib 82 is formed at the center of the protrusion part 72. Thus, the bending of the clamp portion 26 is prevented and the strength of the clamp portion 26 is increased.
[0028]
On the other hand, in the center of the long groove portion 76 of the elastic member 66, a groove portion 84 that can be engaged with the reinforcing rib 82 is formed. After the elastic member 66 is attached to the clamp portion 26, the elastic member 66 is moved in the longitudinal direction. I try not to move.
[0029]
Here, the engaging portion 50 formed on the side surface of the fitting portion 16 is inclined obliquely from below to above toward the inside of the fitting portion 16 from the front end portion 50A to the base portion 50B over substantially the entire width direction. An engagement surface 86 is formed by cutting into the surface.
[0030]
On the other hand, a claw-like engaged portion 90 protruding outward is formed on the flexible piece 88 that is the side wall of the clamp portion 26 over substantially the entire width direction. The engaged portion 90 is formed with an engaged surface 92 that is obliquely cut from the lower portion to the upper portion inward from the distal end portion 90A to the base portion 90B.
[0031]
The engaged surface 92 is angled so as to come into contact with the engaging surface 86 when the clamp portion 26 is rotated toward the clamp portion 22 side.
[0032]
The flexible piece 88 is thin and can be bent inward. When the clamp portion 26 is rotated toward the clamp portion 22, the engaged portion 90 slides on the front surface 94 of the engaging portion 50. When the flexible piece 88 is elastically deformed inward and exceeds the distal end portion 50A of the engaging portion 50, it is elastically restored. At this time, the engaged portion 90 rotates in the direction of arrow C around the base portion of the flexible piece 88, and the engaging surface 86 and the engaged surface 92 are engaged.
[0033]
Therefore, when the engagement between the engagement surface 86 and the engaged surface 92 is released, the engaged portion 90 must be rotated to the opposite side in the arrow C direction around the base of the flexible piece 88. Therefore, once the engaging surface 86 and the engaged surface 92 are engaged, they cannot be easily removed.
[0034]
Further, a click feeling is obtained when the engaging surface 86 and the engaged surface 92 are engaged, and it is immediately known whether or not the engaging surface 86 and the engaged surface 92 are engaged.
[0035]
As shown in FIG. 4, a lock portion 96 is recessed below the engaging portion 50.
[0036]
The depth of the lock portion 96 is substantially equal to the thickness of the engaged portion 90. For this reason, the engaged portion 90 does not protrude inward.
[0037]
The bottom surface 96B of the lock portion 96 is formed so as to be orthogonal to the inner wall 96C, and the corner portion is chamfered to be a tapered surface 96A.
[0038]
On the other hand, an abutting portion 98 is formed at the tip of the engaged portion 90 so as to be orthogonal to the flexible piece 88 and is set to come into contact with the bottom surface 96 </ b> B of the lock portion 96. A corner portion of the contact portion 98 is chamfered to be a tapered surface 98A.
[0039]
Therefore, when the flexible piece 88 is elastically deformed inward and elastically restored beyond the distal end portion 50A of the engaging portion 50, and the engaged surface 92 engages with the engaging surface 86, the bottom surface 96B The taper surface 98A of the contact portion 98 hits the taper surface 96A formed at the corner portion, the engagement surface 86 and the engaged surface 92 are smoothly engaged, and the contact portion 98 is brought into surface contact with the bottom surface 96B.
[0040]
With such a configuration, the bottom surface 96B of the lock portion 96 and the contact portion 98 are in contact with each other, so that the clamp portion 26 is pulled in the direction of arrow A and parallel to the engaging surface 86 in the engaged portion 90 in the direction of arrow B. Even if a force is generated, the lock portion 96 receives the contact portion 98 with respect to the force in the direction of arrow B, and the engaged surface 92 is prevented from slipping off from the engaging surface 86.
[0041]
As shown in FIG. 2, a rib 81 is formed at the center of the lock portion 96 across the back wall 96 </ b> C, the bottom surface 96 </ b> B, and the engagement surface 86. On the other hand, a notch 83 is formed at the center of the engaged portion 90 and can be engaged with the rib 81 when the engaging surface 86 and the engaged surface 92 are engaged.
[0042]
Therefore, even if the fuel pipe 24 is pulled in the longitudinal direction of the fuel pipe 24 in a state where the engagement surface 86 and the engaged surface 92 are engaged and the fuel pipe 24 is sandwiched, the engaged portion 90 does not move in the pulling direction. In addition, since the notch 83 is formed in the flexible piece 88, the flexible piece 88 is easily bent inward, and when the engaging surface 86 and the engaged surface 92 are engaged, the flexible piece 88. Unreasonable force is not applied.
[0043]
Next, the usage method of the clamp 10 which concerns on this form is demonstrated.
[0044]
As shown in FIG. 3, first, the elastic members 66 are attached to the clamp part 22 and the clamp part 26, respectively.
[0045]
Next, the fuel pipe 24 is held on the elastic member 66 on the clamp portion 22 side, the clamp portion 26 is rotated, and the engagement surface 86 and the engaged surface 92 are engaged, so that the clamp portion 22 and the clamp The fuel pipe 24 is sandwiched between the portion 26 and held so as not to come off.
[0046]
Then, with the fuel pipe 24 held by the clamp 10, the clamp 10 is attached to the stud bolt 14 (see FIG. 2). The stud bolt 14 is inserted into the hole 48 of the fitting portion 16, and the tip end portion 52 </ b> A of the retaining piece 52 is bitten into the thread groove of the stud bolt 14 so that the clamp 10 is not easily detached.
[0047]
At this time, even when the clamp part 26 is pulled by the fuel pipe 24, the bottom face 96B of the lock part 96 and the abutting part 98 are in contact with each other, so the engaged part 90 slides down in the direction of arrow B (see FIG. 4). There is nothing.
[0048]
Even if the outer dimension of the fuel pipe 24 is large, the engaged portion 90 does not come off the engaging portion 50 due to vibration, impact, or the like.
[0049]
On the other hand, since the elastic member 66 is attached to the clamp portion 22 and the clamp portion 26, the fuel pipe 24 is firmly held, and even if the fuel pipe 24 is slightly pulled by the frictional force acting between the elastic member 66, the fuel pipe 24. Does not move. Further, even if the outer diameter dimension of the fuel pipe 24 is slightly large, the dimension can be absorbed.
[0050]
【The invention's effect】
Since the present invention is configured as described above, in the first aspect of the present invention, even if the other clamp is pulled and a force acting in parallel with the engagement surface is generated, the engaged portion is not detached from the engaging portion. Absent. Further, the engaged portion is not detached from the engaging portion due to vibration, impact, or the like. According to the second aspect of the present invention, when the engaging surface and the engaged surface are engaged with each other, a click feeling is obtained, and it is immediately known whether or not the engaging surface is engaged.
[Brief description of the drawings]
FIG. 1 is a schematic view of an automobile using a clamp according to the present embodiment.
FIG. 2 is an exploded perspective view showing a clamp according to the present embodiment.
FIG. 3 is a side view showing a clamp according to the present embodiment.
FIG. 4 is a side view showing a state in which the engaging surface and the engaged surface of the clamp according to the present embodiment are engaged.
FIG. 5 is a perspective view showing a conventional clamp.
FIG. 6 is a side view showing a state where an engaging surface and an engaged surface of a conventional clamp are engaged.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Clamp 22 Clamp part 26 Clamp part 50 Engagement part 86 Engagement surface 88 Flexible piece 90 Engagement part 92 Engagement surface 96 Lock part 98 Contact part

Claims (2)

A clamp locking mechanism for holding and holding a sandwiched body between one clamp part and the other clamp part which are fixed to the attachment part and rotatably connected by a hinge part,
An engagement part formed on one clamp part and formed with an engagement surface obliquely cut from the tip part to the base part, and the other clamp part are substantially U-shaped, and the other clamp An engaged portion formed on an outer surface of a free end portion of the portion, and formed to be engaged with the engaging surface by being obliquely cut from the tip portion to the base portion, and the engaged portion When a force is applied to the other clamp portion in a state where the engagement surface and the engaged surface are engaged with each other, the contact portion formed on the base portion of the portion and the one clamp portion are engaged. A lock mechanism for a clamp, comprising: a lock portion that receives a contact portion with a surface by a force acting on the engaged portion in parallel with the engagement surface.   The other clamp portion elastically deforms inward when the engaged portion slides along the opposite surface of the engaging surface, and elastically recovers when the tip of the engaging portion is exceeded. The clamp mechanism according to claim 1, wherein the clamp mechanism is a flexible piece that engages with a surface.

Images