JPH082487Y2 - Skrillyu Grommet - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a screw grommet in which a male screw is screwed and fixed to a mounting member when the mounting member is inserted into the mounting hole.

[Conventional technology]

In automobiles, a scribble grommet is used for mounting various members. For example, in the mounting screw grommets for the moldings arranged on the peripheral portion of the rear window glass, the moldings are locked and inserted into and fixed to the mounting holes of the body panel so that the moldings can be locked to the body panel. Has become.

As this type of screw grommets, there is a structure in which a female screw member is connected through a thin portion to a leg portion which is exposed from the lower surface of the head having a through hole for male screw penetration. (JP-A-61-192908, JP-A-63-8410).
According to this structure, the female screw member is inserted into the mounting hole of the body panel together with the legs, and in this inserted state, the tapping screw is screwed into the female screw member through the through hole of the head. . When the tapping screw is screwed into the female screw member, the thin portion is broken and the female screw member enters the inside of the leg portion to expand the diameter of the leg portion. The body panel is sandwiched between the head and the body and is fixed to the body panel.

However, in this structure, the thin-walled part is broken by the screwing of the tapping screw during use, so if the tapping screw is loosened during removal, the female screw member will separate from the tapping screw and the inside of the body panel. It may be impossible to remove the female screw member in some cases. Further, since the female screw member is detached from the leg portion when detached, it cannot be reused after use.

[Problems to be solved by the device]

In consideration of the above facts, the present invention has an object to obtain a screw grommet in which a female screw member does not drop even if a male screw such as a tapping screw is loosened at the time of removal and which can be reused.

[Means for Solving the Problem] The screw grommet of the present invention is a screw grommet in which a male screw is screwed and fixed to a mounting member in a state where the mounting member is inserted into a mounting hole. A head having a through hole, a leg portion that is exposed from the lower surface of the head portion and inserted into the attachment hole, and a hollow portion of the leg portion that is non-rotatable and movable in the leg protrusion direction. And a female screw member into which a male screw is screwed through the through hole, a window provided in the side wall of the leg portion to communicate the inside and outside of the leg portion, and protruding from the female screw member to the outside from the window. The female screw member is elastically projected and is locked to the leg portion so as not to be separated from the leg portion, and the mounting member is provided between the female screw member and the head portion by moving the female screw member in a direction approaching the head portion. For clamping and moving the female screw member in the direction away from the head Therefore, it has a claw that hits the lower edge of the window and is elastically deformed inward to be housed in the hollow part of the leg part, and elastically presses the hollow part of the leg part to hold the female screw member so as not to separate from the leg part. It is characterized by that.

[Action]

In the screw grommet of the present invention, windows are formed on the side walls of the legs. The female screw member bends the claw inward and is inserted into the hollow part of the leg from the tip end side of the leg.When the claw reaches the window, the claw elastically spreads and projects outward from the window. A screw member is attached to the leg.

When fixing the screw grommet to the mounting member, the leg portion to which the female screw member is assembled is inserted into the mounting hole of the mounting member. At this time, since the claw hits the mounting hole and is elastically deformed inward, the claw can pass through the mounting hole.

When the pawl passes through the mounting hole of the mounting member, the pawl elastically restores to project from the window and is temporarily fixed to the mounting member.
In this state, when the male screw is screwed into the female screw member through the through hole of the head, the female screw member moves in the direction approaching the head, so the mounting member is clamped between the claw and the head. Then, the screw grommet is fixed to the mounting member.

When the male screw is loosened with the screw grommet fixed to the mounting member, the male screw separates from the head, so that the male screw can be pushed in here. When the male screw is pushed in, the female screw member moves in a direction away from the head, and the pawl hits the lower edge of the window and is housed in the hollow portion of the leg portion. At this time, the claw presses the hollow portion of the leg portion outward due to the elastic force. Therefore, the female screw member is held by the leg portion and does not separate.

Further, since the claw is housed in the hollow portion of the leg portion, the claw can pass through the mounting hole. As a result, the leg portion can be extracted from the mounting hole together with the female screw member, and the screw grommet can be removed from the mounting member.

After the screw grommet is removed from the mounting member, when the female screw member is pushed in and moved toward the head, the pawl again projects from the window by the elastic force and returns to the state before use, so that it can be reused.

〔Example〕

FIG. 1 and FIG. 13 show a scribble glume 10 to which the present invention is applied.

As shown in FIG. 1, this screw-on grommet 10 is combined with the tapping screw 12 to form a molding 14
It is designed to be used for mounting.

The molding 14 is attached to the body panel 18 of the automobile as shown in FIG. 14 so as to cover the peripheral portion of the rear window glass 16. As shown in FIG. 1, both ends in the width direction of the molding 14 are bent into a substantially U shape, and a part of the screw-in-grommet 10 is inserted through the both ends in the width-direction to be locked to the screw-in-grommet 10. It is supposed to be done. The body panel 18 has a substantially rectangular mounting hole 20
Is formed, and the screw grommet 10 is inserted into the mounting hole 20, and the tapping screw 12 is screwed into the screw grommet 10 in this inserted state so that the screw grommet 10 is fixed. As a result, the molding 14 can be attached to the body panel 18 via the scribing grommet 10.

Explaining in detail about SCREEN GROMET 10,
As shown in FIGS. 1 and 2, the locking piece 24 is projected upward from one side of the peripheral edge of the rectangular plate-shaped head portion 22 (FIGS. 1 and 2) and the lower surface of the head portion 22. From the (lower surface in FIGS. 1 and 2) to the lower portion (downward in FIGS. 1 and 2) of the leg portion 26
Is protruding.

As shown in FIG. 9, a through hole 28 is formed in the head portion 22 at a substantially central portion thereof, and the tapping screw 12 is screwed through the through hole 28. This through hole 28
Two small-diameter cylindrical portions 30 and 32 having different diameters are coaxially projected from the upper surface of the head 22 (the upper surface in FIGS. 1 and 2) around the circumference of the head 22 and have a small diameter. A rib 34 is projected around the cylindrical portions 30 and 32.

The small-diameter cylindrical portions 30 and 32 have a smaller diameter than the head portion of the tapping screw 12, and allow the tapping screw to be inserted into the through hole 28 of the head portion 22.
When inserting 12, the head of tapping screw 12 comes into contact with the tip to limit the insertion amount of tapping screw 12, and at the same time as tapping screw 12 is inserted in the non-threaded state, tapping screw 12 The tapping screw 12 can be easily pulled out by hooking a finger on the head. Further, the small-diameter cylindrical portions 30 and 32 are thin-walled, so that when the tapping screw 12 is screwed, the head of the tapping screw 12 comes into contact with the tip of the tapping screw 12, so that the tapping screw 12 acts as a loosening stopper. Has become. When the tapping screw 12 is screwed, the small-diameter cylindrical portions 30 and 32 may be deformed by the tightening force of the tapping screw 12. The small-diameter cylindrical portion 30 having a small diameter is slightly thinner than the other small-diameter cylindrical portion 32.

A plurality of ribs 34 are provided outside the small diameter cylindrical portion 32 having a large diameter so as to surround the small diameter cylindrical portion 32. These ribs 34
Is slightly higher than the small-diameter cylindrical portions 30 and 32 in the vicinity of the small-diameter cylindrical portion 32 as shown in FIGS. 3 and 4, and the tapping screw 12 is inserted at the insertion limit of the tapping screw 12.
It is configured so that other peripheral members and the fingers of a worker or the like are not caught on the head of 12 when working.

The middle portion of the locking piece 24 is bent at a substantially right angle, and the tip end is the head.
It is presented above 22 (opposite leg 26) away from head 22. Narrow projections 36 project from both sides of the locking piece 24 in directions away from each other, and the distance between the projections 36 gradually widens toward the tip. As shown in FIG. 3, the locking piece 24 has a recess 38 formed in an intermediate portion on the side opposite to the projecting side of the projecting piece 36. The recess 38 is for locking the molding 14 together with the protrusion 36. Ie mall 14
1 is rotated in the direction of the arrow B in FIG. 1 with the tip of the protrusion 36 inserted between the both ends of the molding 14 in the width direction, and is rotated by the rotation as shown in FIG. One end of the molding 14 in the width direction is accommodated in the recess 38 with the projecting piece 36 inserted inside the molding 14,
Is locked.

As shown in FIG. 3 and FIG. 4, the leg portion 26 has a tubular shape with a rectangular cross section having a hollow portion coaxially communicating with the through hole 28 of the head portion 22. The tapping screw 12 is inserted inside. Further, as shown in FIGS. 11 and 12, the leg portion 26 has a tapered tip portion so that it can be easily inserted into the mounting hole 20 of the body panel 18. A seal member 40 is fitted to the leg portion 26 in the vicinity of a connecting base portion to the head portion 22, and is inserted into the mounting hole 20 of the body panel 18 in this fitted state. The sealing member 40 is a flexible material, and the body panel 18
When the leg portion 26 is inserted into the mounting hole 20, it is interposed between the surface of the body panel 18 and the head portion 22 to seal the both, as shown in FIG.

As shown in FIG. 8 and FIG.
A window 42 communicating between the inside and the outside is formed in the vicinity of a connecting base portion of the two parts on opposing walls facing each other with the axis of the leg portion 26 interposed therebetween. Also, as shown in FIGS. 11 and 12, a pair of slits 43 which are parallel to each other are formed from the tip end portion on the remaining opposing walls in which these windows 42 are not formed, and between these slits 43. The elastic piece 44 is elastically deformable in the expansion / contraction direction of the hollow portion (direction of arrow A).

Each of these elastic pieces 44 has a substantially rectangular engaging hole near the base.
50 is formed, and an engagement groove 52 is formed on the back surface so as to correspond to the engagement hole 50. The engagement groove 52 is provided from the tip of the elastic piece 44 to the vicinity of the base of the leg portion 26, and the intermediate portion thereof communicates with the engagement hole 50.

As shown in FIGS. 3 and 4, a small projection 46 is formed on the inner circumference of the leg portion 26 near the connecting base portion to the head portion 22.

The small protrusion 46 is formed on the head 22 along the rear surface of the facing wall adjacent to the window 42.
A pair of holes are provided so as to face each other so as to surround a part of the through hole 28, and the axial length of the through hole 28 of the head 22 is extended. The portion of the small protrusion 46 facing the window 42 is a slope 54 that has an upward slope toward the head 22 side.

An internal thread member 48 is accommodated inside the leg portion 26 as shown in FIGS. 3 and 4, and the internal state of the internal thread member 48 is as shown in FIG. It is designed to be inserted into the mounting hole 20 of the body panel 18.

The female screw member 48 has a substantially rectangular outer peripheral cross-sectional shape corresponding to the hollow portion of the leg portion 26, is inserted from the tip of the leg portion 26 into the inside of the leg portion 26, and cannot rotate inside the leg portion 26. The legs are arranged so as to be movable in the vertical direction. The female screw member 48 has a screwing hole 56 formed in the axial center thereof, and the tapping screw 12 is screwed into the screwing hole 56 through the through hole 28 of the head 22 in a state of being accommodated inside the leg portion 26. It is supposed to be combined.

As shown in FIG. 1, the female screw member 48 is integrally formed with an engaging projection 58 on its outer periphery.

The engagement protrusion 58 is engaged with the engagement groove 52 of the leg portion 26 when the leg portion 26 is housed inside and is guided by the engagement groove 52 to correspond to the engagement hole 50. When the female screw member 48 is housed inside the leg portion 26, the engaging protrusion 58 elastically deforms the elastic piece 44 in the leg diameter expanding direction (direction of arrow A) and engages with the engaging groove 52. Corresponding to the hole 50, as shown in FIG. 4, the elastic force of the elastic piece 44 allows the elastic piece 44 to enter the engaging hole 50.

When the engaging projection 58 is inserted in the engaging hole 50, the movement of the female screw member 48 in the vertical direction of the leg (extinguishing direction of the leg) is restricted (temporarily fixed state). It is designed to be released by the tightening force of the pin screw 12 or the pressing force when the female screw member 48 is pushed downward with a large force (in the direction away from the head). That is, when the tapping screw 12 is screwed into the screwing hole 56 of the female screw member 48 in a temporarily fixed state in which the engaging projection 58 is inserted in the engaging hole 50, the tapping screw 12 at this time is The tightening force gives the female screw member 48 a moving force to the upper part of the leg (a direction approaching the head), and this moving force pulls out the engaging projection 58 from the inside of the engaging hole 50 as shown in FIG. It is supposed to be served. In addition, when the female screw member 48 is pushed downward with a large force in the temporarily fixed state in which the engaging protrusion 58 is inserted in the engaging hole 50 (a direction away from the head), the pressing force at this time is used. A downward moving force is applied to the screw member 48, and the engaging projection 58 is pulled out from the inside of the engaging hole 50 by this moving force as shown in FIG.

From this female screw member 48, a claw 60 is integrally extended in the axial direction from the remaining outer peripheral surface where the engaging projection 58 is not formed. Groove 61 is formed at the base of the connection between the claw 60 and the female screw member 48.
Are formed so that the tips of the claws 60 can be brought into contact with and separated from each other. A space between these claws 60 is a guide surface for guiding the tapping screw 12 into the screw hole 56 of the female screw member 48.

These claws 60 are inserted into the inside of the leg portion 26 from the tips when the female screw member 48 is accommodated in the inside of the leg portion 26. Further, these claws 60 have a taper shape in which the outer diameter dimension gradually increases from the connection base portion with the female screw member 48 to the tip portion in a free state, and the maximum outer diameter dimension D (shown in FIG. 1) is The inner diameter of the leg portion 26 is larger than that of the leg portion 26, and when the female screw members 48 are housed inside the leg portion 26, they are elastically deformed in a direction in which they approach each other. In addition, each claw 60 has a sloped surface adjacent to the tapered surface and inclined in opposite directions.
70 is formed, and when the female screw member 48 is housed inside the leg portion 26, a jig or the like is brought into contact with the inclined surface 70 and elastically deformed in a direction in which they approach each other.

These claws 60 are engaged holes of the leg portions 26 as shown in FIG.
A female screw member in which the engaging protrusion 58 of the female screw member 48 enters into the inside 50.
In the temporarily fixed position of 48, as shown in FIG.
Projecting from the inside of the leg portion 26 to the outside through the female screw member 48
Is locked to the leg portion 26 so as not to come off below the leg portion. In addition, the leg part to the mounting hole 20 of the body panel 18
By inserting 26, it passes through the mounting hole 20 of the body panel 18,
As shown in FIG. 6, the body panel 18 can be sandwiched between the body 22 and the head 22 by the tapping screw 12 to the female screw member 48. That is, when the leg portion 26 is inserted into the mounting hole 20 of the body panel 18, the claw 60 projecting to the outside of the leg portion 26 through the window 42 of the leg portion 26 comes into contact with the inner circumference of the mounting hole 20 of the body panel 18. While passing through the mounting hole 20 of the body panel 18 while elastically deforming to the inside of the leg portion 26, thereafter, the claw 60 restores its shape and projects from the inside of the leg portion 26 to the outside as shown in FIG. Then, when the tapping screw 12 is screwed into the screw hole 56 of the female screw member 48 in this state, the female screw member 48 moves above the leg portion 26 (in a direction approaching the head portion 22), By this movement, the claw 60 abuts against the slope 54 of the small protrusion 46 of the leg portion 26 and is expanded, and the movement and deformation cause the claw 60 to be expanded as shown in FIG. 6 and the back surface of the body panel 18. The body panel 18 is sandwiched between the claw 60 and the head 22 by abutting against the.

Further, these claws 60 are below the legs (the side away from the head 22) with respect to the temporary fixing position of the female screw member 48 in which the engaging protrusion 58 of the female screw member 48 enters the engaging hole 50 of the leg portion 26. Female thread member
At the accommodating position of 48, the leg portion 26 is elastically deformed from the outside to the inside so that it can pass through the mounting hole 20 of the body panel 18 and is elastically pressed against the inner peripheral surface of the leg portion 26 so that the female screw member 48 is legged. It is designed to be held by the leg portion 26 so as not to come off below the member.

 Next, the operation of this embodiment will be described.

The screw thread grommet 10 is preliminarily attached to the female screw member 48.
Is inserted into the inside of the leg portion 26 from the tip end side of the claw 60, and the female screw member 48 is placed at a position where the engaging projection 58 of the female screw member 48 enters the engaging hole 50 of the leg portion 26 as shown in FIG. Is temporarily stopped.
At the time of this temporary fixing, the female screw member 48 is pushed in from the tip side of the leg portion 26 until the engaging protrusion 58 corresponds to the engaging hole 50. At this time, the coupling protrusion 58 causes the elastic piece 44 to move in the radial direction of the leg portion. While being elastically deformed (in the direction of arrow A), it is guided by the engaging groove 52 to correspond to the engaging hole 50, and at the same time as to correspond to the engaging hole 50, the elastic force of the elastic piece 44 causes the engaging protrusion in the engaging hole 50. Since the 58 is inserted, the pushing force of the female screw member 48 is changed at the same time as the engaging protrusion 58 is inserted into the engaging hole 50, and the female screw member 48 can be temporarily fixed with moderation.

When mounting the molding 14, attach it to the locking piece 24 beforehand.
The seal member 40 is fitted around the base portion of the leg portion 26 while the 14 is locked, and in this state, the seal member 40 is inserted into the mounting hole 20 of the body panel 18 from the tip of the leg portion 26.

When locking the molding 14, the tip of the projecting piece 36 of the locking piece 24 is inserted into the molding 14 through the widthwise ends of the molding 14, and in this inserted state, the locking piece 24 is placed around the tip of the projecting piece 36. Fig. 1 Rotates in the direction of arrow B. This allows the mall 14
With the protruding piece 36 inserted inside the
The one end portion in the width direction is accommodated and the molding 14 is locked to the locking piece 24.

When inserting the leg portion 26 into the mounting hole 20 of the body panel 18,
The pawl 60 passes through the mounting hole 20 of the body panel 18 while being elastically deformed inside the leg portion 26, whereby the leg portion 26 is inserted into the mounting hole 20 of the body panel 18.

When the leg portion 26 is inserted into the mounting hole 20 of the body panel 18, the pawl 60 is restored to its shape after passing through the mounting hole 20 of the body panel 18, so that the pawl 60 is moved to the leg portion 26 as shown in FIG. It projects from the inside to the outside, and the claw 60 prevents the leg portion 26 from being pulled out. Therefore, the mounting hole 20 of the body panel 18
The leg portion 26 is inserted into the body panel 18 to prevent the leg portion 26 from being pulled out and temporarily fixed to the body panel 18.

After inserting the leg portion 26 into the mounting hole 20 of the body panel 18, the tapping screw 12 is screwed into the screwing hole 56 of the female screw member 48 as shown in FIG. When the tapping screw 12 is screwed into the screw hole 56 of the screw member 48, the female screw member 48 moves to the upper part of the leg (in the direction of approaching the head 22), and this movement causes the small part of the leg part 26 to move. The claw 60 abuts against the slope 54 of the projection 46 and is expanded, and the movement and deformation of the claw 60 expands the claw 60 to abut the back surface of the body panel 18 between the claw 60 and the head 22. The panel 18 is clamped so that the molding 14 is attached to the body panel 18.

In addition, in the mounted state of the molding 14, the seal member 40 is interposed between the surface of the body panel 18 and the head portion 22, and rainwater or the like may enter the inside of the body panel 18 through the mounting holes 20 of the body panel 18. There is no. Further, the head of the tapping screw 12 is surrounded by the ribs 34, so that the head of the tapping screw 12 is not caught by other peripheral members or a finger of an operator during work.

After mounting the molding 14, the tapping screw 12 can be loosened and removed from the body panel 18, and can be reused even after being removed from the body panel 18.

That is, when the tapping screw 12 is loosened at the time of removal from the body panel 18, the female screw member 48 is separated from the tapping screw 12 and can be moved downward in the leg (in the direction away from the head 22), If the tapping screw 12 is pushed in in this state, the
58 is pulled out and the claw 60 is elastically deformed from the outer side to the inner side of the leg portion 26 as shown in FIG. 7, but the claw 60 is pressed against the inner peripheral surface of the leg portion 26 by the elastic force, and the female screw member. 48 is leg 26
It is held by the leg portion 26 so as not to be detached from. As a result, the claw 60 does not get caught on the inner periphery of the mounting hole 20 of the body panel 18 and the slack screw member 48 does not fall inside the body panel 18, and the leg portion 26 is attached to the mounting hole of the body panel 18. It can be pulled out from 20 and removed.

After removal from the body panel 18, the engagement protrusion 58 of the female screw member 48 is inserted into the engagement hole 50 of the leg portion 26 from the tip end side of the leg portion.
When the female screw member 48 is pushed in until the screw enters, the engaging projection of the screw member 48 is inserted into the engaging hole 50 of the leg portion 26 as shown in FIG.
At the position where 58 enters, the claw 60 restores its shape and protrudes from the inside of the leg 26 to the outside 26 through the window 42 of the leg 26. From this state, hook the finger on the head of the tapping screw 12 and the like. If the tapping screw 12 is pulled out from the through hole 28 of 22, the state before use is returned to the state where it can be reused.

The ribs 34 may be provided in an arrangement as shown in FIG. 15 in accordance with the shape of the peripheral members of the molding 14 or the like.

[Effect of device]

As described above, the screw-grommet according to the present invention has an excellent effect that the female screw member does not drop even if the male screw is loosened at the time of removal and it can be reused.

[Brief description of drawings]

1 to 11 show an embodiment of a scribble grommet according to the present invention, FIG. 1 is an exploded perspective view, FIG. 2 is a perspective view showing an assembled state of FIG. 1, and FIG. Fig. 2 is a sectional view taken along the line III-III, Fig. 4 is a sectional view taken along the line IV-IV in Fig. 2, and Figs. 5, 6, and 7 show the operation during use, respectively. Sectional view shown corresponding to the drawing, FIG. 8 is a front view of FIG. 2, FIG. 9 is a plan view of FIG. 8, FIG. 10 is a bottom view of FIG. 8, and FIG. 11 is FIG. Fig. 12 is a left side view of Fig. 8, Fig. 13 is a left side view of Fig. 13, Fig. 13 is a rear view of Fig. 8, and Fig. 14 is an automobile showing the installation state of the mall attached by the scribing grommet of Fig. 1. FIG. 15 is a perspective view of a rear portion of the other embodiment, and FIG. 15 is a perspective view showing another embodiment corresponding to FIG. 10 …… Screwout Grommet, 12 …… Tapping screwout (male thread), 18 …… Body panel (mounting member), 20
…… Mounting hole, 22 …… Head, 26 …… Leg, 28 …… Through hole,
48 …… Female thread member, 56 …… Screw hole, 60 …… Claw.

Claims (1)

[Scope of utility model registration request] 1. A screw grommet in which a male screw is screwed and fixed to the mounting member in a state where the mounting member is inserted into the mounting hole, the head having a through hole for penetrating the male screw; A leg extending from the lower surface of the leg and inserted into the mounting hole, and a non-rotatable and movable in the leg extending direction housed in the hollow portion of the leg, and a male screw is screwed through the through hole. Female thread member, a window formed in the side wall of the leg portion to communicate the inside and outside of the leg portion, and a female screw member protruding from the female screw member and elastically projecting outward from the window to form the female screw member in the leg. It is locked to the leg part so as not to be separated from the head part, and the mounting member is sandwiched between the head part and the head part by the movement of the female screw member in the direction approaching the head part, and the mounting member is separated from the head part. When the female screw member moves, it hits the lower edge of the window and elastically deforms inward, causing the legs to move. Is accommodated in the hollow portion, screw grommet and having a pawl for holding so as not separated from the leg of the female screw member elastically pressing the hollow portion of the leg.