JPH11247812A - Fastener - Google Patents

Abstract

PROBLEM TO BE SOLVED: To manufacture a fastener with a conventional working process and to easily manufacture it even in a portion of a resin part by simplifying its structure. SOLUTION: A pin part 42 is integrally formed in a base end of a tube hole 54 of a tube part 40 whose front part is inserted into a through hole, and an engaging part 52 is integrally formed in a boundary between a part of a mold 62 to form a tube part 40 side and a part of a mold 58 to form the pin part 42 such that these molds 62, 58 can be separated to release it. The tube part 40 is formed with latching structure parts 80, 82 which engage with the engaging part 52 to keep the tube part 40 fastened to the through hole after the pin part 42 is pressed into the tube hole 54.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a mounting member having a through-hole formed in a supporting member, wherein a pin is press-fitted into a cylindrical hole of the cylindrical portion so as to expand the cylindrical portion, thereby forming a member to be mounted. The present invention relates to a fastener to be fastened to a support member.

[0002]

2. Description of the Related Art As a fastening member for fastening a resin component using a through hole of a support member, a so-called hook (claw) as illustrated in FIGS. 15 to 17 has conventionally been used. This plug has a cylindrical part 12 integrally formed with a fastening part of a plastic part, for example, a plastic cover member 10 to be attached, and a pin member 16 at one end of a cylindrical hole 14 of the cylindrical part 12. It is configured to be integrally protruded.

[0003] The end of the cylindrical portion 12 opposite to the side on which the pin member 16 is provided extends from the cover member 10 as an insertion cylindrical portion 12A. The extended insertion tube portion 12A is provided with slits 18 at two locations diametrically opposed to each other, and by expanding this portion, the insertion tube portion 12A is easily elastically deformed and inserted. Tube part 12
A expands in diameter.

The cylindrical hole 14 of the cylindrical portion 12 is provided with a pin member 16.
Is formed in the shape of a truncated cone whose inner diameter is smoothly reduced from the side where the is provided to the tip of the insertion tube portion 12A opposite thereto. That is, the insertion tube portion 12A is formed so as to be thicker toward its free end. Further, a groove 20 for preventing stress concentration, which is an annular groove, is formed in a root portion of the outer periphery of the insertion tube portion 12A to the plastic cover member 10.

[0005] In the thus-configured fastener, as shown in FIG.
The pin member 16 is driven into the cylinder hole 14 in a state where the pin member 16 passes through the through hole 24. Then, the connecting portion of the pin member 16 with the end opening is broken, and the pin member 16 is press-fitted into the insertion tube portion 12A to be in the fastening state shown in FIG.

In the fastening state shown in FIG.
The cylindrical hole 14 formed in the shape of a truncated cone so that the inner diameter decreases toward the tip of 2A is expanded so that the inner diameter becomes constant. As a result, the distal end of the insertion tube portion 12 protruding from the through hole 24 has the outer diameter of the outer peripheral surface portion of the through hole 2.
4 is larger than the inner diameter of
4, and the fastening state of the plastic cover member 10 to the support member 22 is maintained.

[0007] The giboshi used as described above is
When the plastic cover member 10 is molded and manufactured, it is integrally molded at the same time. At this time, since the insert portion is formed into the shape shown in FIG. 15, the outer surface portion of the pin member 16 and the outer peripheral portion of the insertion tube portion 12A are formed by separate molding dies, and are formed in these axial directions. Dies can be cut out by moving each mold along. Furthermore, the cylindrical hole 14
Since the inner diameter is reduced toward the opening end at the time of molding, as shown in FIG. 16, a slide pin 26 as a core for forming the cylindrical hole 14 is punched out by a so-called forced punching method. I do. That is, after another die is removed, the slide pin 26 is strongly pulled to deform the insertion tube portion 12A elastically and pulled out, thereby manufacturing a fastener as a fastening body.

[0008]

In the structure of the so-called giboshi as a fastening member as described above, in order to maintain the fastening state shown in FIG.
6 must not fall off. In this fastened state, the pin member 16 is held only by the friction due to the reaction force when the pin member 16 is elastically deformed so that the outer diameter of the pin member 16 when pressed into the cylindrical hole 14 is reduced. If the amount of deformation (press-fitting allowance) is not properly maintained, the frictional force holding the pin member 16 fluctuates greatly, and if the frictional force is reduced, the pin member 16 is inserted into the cylindrical hole 14.
There is also a risk of getting out of. Therefore, in order to properly maintain the press-fitting allowance of the pin member 16, the outer diameter of the pin member 16,
4 had to be machined and manufactured with extremely high precision.

The present invention has been made in consideration of the above-described circumstances, and has as its object to provide a new fastening body which has a simple structure, can be easily manufactured by ordinary processing, and is suitable for integral molding.

[0010]

According to a first aspect of the present invention, there is provided a fastening member provided on a member to be mounted so as to fit into a hole of a support member and fasten the member to be mounted. A cylindrical portion having a distal end portion penetrated into the hole, and a pin member having a distal end portion integrally connected to a mounted member via a breakable connection portion at a proximal end portion of the cylindrical hole of the cylindrical portion,
By separating the mold for molding the cylinder side and the mold for molding the pin member side, it is possible to remove the mold,
An engaging member integrally formed with the pin member is engaged with the pin member in a state where the connecting member with the cylindrical portion is broken and inserted into the cylindrical hole, the outer diameter of the cylindrical portion is enlarged, and the pin member is fastened to the hole portion. And a support structure for engaging the mating member to prevent the pin member from coming out of the cylindrical hole of the cylindrical portion.

[0011] With the above-described structure, the pin member is inserted into the cylindrical hole in a state where the main body of the fastening body in which the cylindrical portion and the pin member are integrally formed is passed through the cylindrical portion through the through hole of the support member. The diameter of the outer periphery of the cylindrical portion is increased by driving into the hole so that the cylindrical portion is fastened so as not to come out of the through hole. At this time, the engagement member protruding from the pin member engages with the support structure provided on the cylinder portion side, and supports the pin member so that the pin member cannot come out of the cylinder hole. Since the engaging member provided on the pin member as such a retaining member is formed in a protruding shape, the engaging member is provided on the cylindrical portion so as not to be caught when the molded product is removed from the mold for integrally molding the engaging member. The combination of the mold and the mold on the pin member side constitutes a cavity for engaging member molding, so that the engaging member is located at the boundary between these molds, and after molding the fastening body, The mold on the cylindrical portion side and the mold on the pin member side are separated, the mold portion surrounding the engaging member portion is separated so as to be split, and the die for extracting the engaging member portion from the mold is removed. Make it easy to do.

According to a second aspect of the present invention, in the first aspect, the tubular portion is formed so as to gradually increase in thickness from the side where the pin member is formed to the free end side. In addition, a slit is formed at the free end of the cylindrical portion, and a supporting structure for engaging the engaging member with the slit is provided.

[0013] With the above structure, in addition to the operation and effect of the above-mentioned fastening body according to claim 1, when a molded product is removed from a mold for integrally molding the engaging member,
After removing the mold for forming the outside of the cylindrical portion, the slide pin, which is the mold for forming the cylindrical hole of the cylindrical portion, is pulled out by a forcible removal method to enable easy production.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment according to the present invention will be described with reference to FIGS. As shown in a schematic perspective view of FIG. 9, the fastening body 30 according to the first embodiment includes a retractor 3 for a vehicle seat belt device.
In order to fasten the spring cover 36 made of polypropylene, which is a resin component, to the second frame fitting 34, the spring cover 36 is integrally formed at three predetermined portions of a flange portion 38.

As can be seen from FIGS. 1 to 4, the fastening body 3
Reference numeral 0 denotes a cylindrical portion provided integrally with the flange portion 38 of the spring cover 36, and a pin member 4 attached thereto.
2 are provided. The tubular portion 40 is formed in a tubular shape, and one end of the tubular portion 40 is protruded from a bottom surface of the flange portion 38 abutting on the frame fitting 34 so as to be longer than the thickness of the frame fitting 34.

As shown in FIG. 3, the cylindrical portion 40 has
A slit 44 is provided at one of the two positions corresponding to the diametrical direction, and a slit 46 with an engaging portion is provided at the other along the axial direction of the cylindrical portion 40. As can be seen from FIGS. 3, 4 and 7, the slit 44 has an inverse width S as shown in FIG. 9 from the distal end of the cylindrical portion 40 to a position corresponding to the bottom surface of the flange portion 38 in the axial direction of the cylindrical portion 40. It is formed by cutting out in a U-shape.

Further, the slit 46 with the engaging portion is provided in the cylindrical portion 40.
From the end of the flange 38 to a position immediately below the outer surface opposite to the bottom surface of the flange portion 38, and is set to have a width L larger than the width S. In the slit 46 with the engaging portion,
A mooring projection 48 is provided from a predetermined position in the longitudinal middle portion of one side of the slit in a direction to narrow the width of the slit.

As shown in FIG. 2, the mooring projection 48 has a substantially trapezoidal shape, and its pin member 42 is formed as a guide oblique side 48A which is formed obliquely in a direction to reduce the width of the slit.
The distal end side of the cylindrical portion 40 is formed on a locking side 48B which stands at a right angle from the side surface of the slit. Further, a support projection 50 is provided at the tip of the cylindrical portion 40 on the other side of the engagement portion-equipped slit 46 in the width direction of the slit. The support projection 50 has a substantially triangular shape as shown in FIG. 2, and extends from a position spaced a predetermined distance from the locking side 48 </ b> B of the mooring projection 48 in the distal direction of the cylindrical section 40 to the distal end of the cylindrical section 40. A support side 50A is formed obliquely in a direction to narrow the width of the slit.

As shown in FIG. 5 and FIG. 6, the engaging side 48B of the mooring protrusion 48 and the most protruding tip of the support protrusion 50 Support edge 5 at a position lower by a predetermined distance from
A small rectangular column-shaped engaging member 52 projecting from the pin member 42 is set to be moored at a portion between the intermediate position of 0A and the intermediate position.

As shown in FIGS. 1 and 2, the pin member 42 has a columnar shape, and the angular periphery of the bottom surface on the lower side of FIG. A base end portion of the cylindrical portion 40 on the opposite outer side (fixed mold 5 described later)
8 and a slide pin 62 as a part of the movable mold 60) at the connecting portion 42A so as to be broken and separable.
Are integrally formed.

As shown in FIGS. 1, 2 and 4, the pin member 42 has an engaging member 52 projecting from the outer periphery of the pin member 42 at a position which is continuous with the slit 46 with the engaging portion. The engaging member 52 is formed in a rectangular parallelepiped shape, and has a width L1 substantially equal to the width L of the slit 46 with the engaging portion. The vertical width M of the engaging member 52 is a height distance between the locking side 48B of the mooring protrusion 48 and the middle part of the support side 50A of the support protrusion 50 when viewed in the axial direction of the cylindrical portion 40. And its height H
(The amount of protrusion of the pin member 42 from the outer peripheral surface) is substantially equal to the thinnest thickness N of the cylindrical portion 40.

As shown in FIGS. 2 to 4, the inner peripheral surface of the cylindrical hole 54 of the cylindrical portion 40 is tapered from the end where the pin member 42 is integrally provided to the end of the free end. It is formed in the shape of a truncated conical slope. For this reason, the thickness of the cylindrical portion 40 is gradually increased from the side where the pin member 42 is provided to the free end side. Further, in the unused state shown in FIGS. 2 and 4 in which a part of the cylindrical hole 54 is closed by the pin member 42, the connecting part 42 </ b> A integrally formed and connected to the cylindrical part 40 and the pin member 42 is formed. The pin member 42 is shown in FIG.
To make it easier to break when driven in the direction of arrow A,
A cutout 54A having a triangular cross section is formed in this connection portion.

As shown in FIGS. 2 and 4, a groove 56 having an inverted U-shaped cross section is formed in the bottom surface of the flange portion 38 along the outer periphery of the cylindrical portion 40. The groove 56 prevents stress from being concentrated on the contact portion between the outer periphery of the cylindrical portion 40 and the flange portion 38 and has elasticity so that the extended free end of the cylindrical portion 40 opens the slits 44 and 46. It is configured to be easily deformed.

Next, an example of a method of manufacturing the fastening body according to the first embodiment will be described with reference to FIGS.

The fastening body 30 is formed simultaneously with the injection molding of the spring cover 36 for the retractor 32. That is, a mold portion of the fastening body 30 is formed at a predetermined portion of the fixed mold 58 which is an injection mold for the spring cover 36 and the slide pin 62 as a part of the movable mold 60.

As a mold for molding the fastening body 30, in addition to the fixed mold 58 and the movable mold 60,
2 are provided. This fixed mold 58 includes a pin member 4
2, a concave portion 66 for forming a required surface portion excluding the bottom surface of the engaging member 52, and a surface forming portion 68 for forming a side surface portion of the flange portion 38 on the pin member 42 side.
Is provided. That is, the engaging member 52 only needs to have a shape that allows the fixed mold 58 in FIG. 7 to be released upward. For this purpose, the engaging member 52 is formed by the pin member 42 in the planar shape of the pin member 42 (FIG. 1). The shape may be any shape as long as it protrudes from the outer periphery of.

The movable mold 60 has a concave portion 70 for forming a portion from the distal end surface to the outer peripheral surface of the cylindrical portion 40.
A convex portion 72 that is an annular protrusion for forming the groove 56 and a surface forming portion 74 that forms a bottom surface that is a side surface portion of the flange portion 38 on the side of the cylindrical portion 40 are provided. Movable mold 60
A slide pin 62 is slidably mounted in the concave portion 70 in the axial direction of the concave portion 70.

The slide pin 62 is provided with a male portion 76 for a cylindrical hole for forming a cylindrical hole 54 formed in a truncated cone shape having a large diameter bottom surface as a free end at the free end of the round shaft. ing. A notch protrusion 76A for forming the notch 54A is provided on the distal end peripheral portion of the cylindrical hole male portion 76.

Further, at two locations facing the diametrical direction of the male portion 76 for the cylindrical hole, a male portion 78 for a slit with an engaging portion for forming the slit 46 with an engaging portion and a slit 44 are formed. (Not shown) is provided. In the male part 78 for the slit with the mooring part, a concave part 80 for the mooring projection for forming the mooring projection 48 is formed on one side thereof, and the supporting projection 50 is formed on the other side. A support projection concave portion 82 to be formed is formed.
Further, the male end portion 78 for the slit with the engaging portion has an end surface at the tip end which closes one open surface of the concave portion 66 for forming the engaging member 52 of the fixed mold 58, and these jointly serve as the engaging member 52. Is formed. That is, a mold for forming the engaging member 52 projecting from the pin member 42 at the boundary between the predetermined portion of the fixed mold 58 and the corresponding slide pin 62 as a part of the movable mold. Are set to be configured.

In each of the molds configured as described above, the portion of the male portion 76 for the cylindrical hole of the slide pin 62 is inserted into the concave portion 64 for the pin member of the fixed mold 58, and the fixed mold 58 and the movable mold 6 are inserted.
0 is matched so that a cavity corresponding to the thickness of the flange portion 38 is formed therebetween. Then, molten polypropylene is injected into the cavity of the mold to integrally mold the entire spring cover 36 together with the fastening body 30. Thereafter, the fastening body 30 as a molded product is die-cut. In this die-cutting operation, the fixed die 58 does not have a so-called undercut portion in which the concave portion 64 for the pin member 42 has a structure in which the inner diameter is larger than the diameter of the outlet of the hole. The recess 66 has no bottom surface portion of the engaging member 52 that faces the direction in which the fastening body 30 as a molded product is pulled out for die-cutting, and a part of the cavity is open. 52 can be pulled out without difficulty.

When the fastening body 30 as a molded product is die-cut from the movable die 60 side, there is no so-called undercut portion in the concave portion 70 and the projection 72 of the movable die 60 itself. It can be easily pulled out from the movable mold 60 itself.

However, when the fastening body 30 as a molded product is die-cut from the slide pin 62, there is a so-called undercut in the portion of the male portion 76 for the cylindrical hole, and the portion of the male portion 78 for the slit in the engaging portion. Mooring projection 48 at
Since the concave portion 80 for the portion and the concave portion 82 for the support projection 50 are caught in the concave and convex portions, the die is removed by a so-called forced removal method. That is, the movable pin 60 is separated from the fixed die 58, and the slide pin 62 is pulled out while elastically deforming the fastening body 30 as a molded product in a state of coming out of the cylindrical section 40. Actually, the releasing operation of the movable die 60 and the extracting operation of the slide pin 62 from the cylindrical portion 40 are performed in conjunction with the moving stroke of the movable die 60. At this time, the one portion of the tubular portion 40 where the mooring protrusion 48 is provided is elastically deformed so as to open the small-angle tip as shown in FIG. 8, and the one portion where the support protrusion 50 is provided also has a small angle. The die can be easily removed simply by elastically deforming to open the tip.

Next, the operation and usage of the thus configured fastening body according to the first embodiment will be described.

After the injection molding, the fastening body 30 is
When it is not used, it is in the state shown in FIGS. That is, the pin member 42 is provided at the outer end of the cylindrical portion 40.
Is in a state in which it can be driven and is on standby. In this state, as shown in FIG. 9, the spring cover 36 is positioned at a predetermined position of the frame fitting 34 of the retractor 32, and as shown in FIGS. The distal end of the cylindrical portion 40 is inserted into a through hole 84 having the same diameter as the diameter. Next, the pin member 42 is driven in the direction of arrow A in the figure. Then, the connecting portion 42A integrally formed with the cylindrical portion 40 of the pin member 42 is broken, and the pin member 42 is
And it is inserted into the cylindrical hole 54 until the state shown in FIG. That is, as the pin member 42 enters the cylindrical hole 54, the cylindrical hole 5
4 is expanded while expanding the slits 44 and 46, and the outer diameter of the portion extending through the through-hole 84 of the cylindrical portion 40 is made larger than the inner diameter of the through-hole 84 as shown in FIG. Spread greatly. As a result, the tubular portion 40 is fastened so as not to fall out of the through hole 84. Further, at the same time, the pin member 42
The engaging member 52 protruding from the mooring protrusion 4 moves in the engaging portion-equipped slit 46 and is guided by the guide oblique portion 48A.
8 and rides on the supporting side 50A of the supporting projection 50, and the locking side 48B of the mooring projection 48 by the reaction force at that time.
Then, the state is brought into pressure contact with the side wall of the slit 46 and held. In this state, even if the pin member 42 attempts to move in the direction of the arrow A of the cylindrical portion 40 along the axial direction, the engaging member 52 in the slit 46 with the engaging portion is supported by the supporting protrusion 5.
0, the movement is stopped.
Is moving in the direction opposite to arrow A,
Strikes the mooring projection 48 of the slit 46 with the mooring portion, and its movement is stopped. Therefore, the operation of the pin member 42 coming out of the cylindrical portion 40 can be stopped by the action of the engaging member 52 and the slit 46 with the engaging portion.

The engaging member 52 of the pin member 42 is connected to the connecting portion 4 between the fixed mold 58 and the slide pin 62 during molding.
Since the fixed member 58 and the slide pin 62 are separated from each other, the engaging member 52 in the concave portion 66 of the fixed member 58 can be pulled out. It does not interfere at all when the mold is removed. Therefore, in order to make the protruding engagement member 52, a mold having a simple configuration without using a mold that is disassembled and combined in a complicated manner, such as a mold that slides a part of the mold to remove the mold, is used. It can be manufactured by Further, for example, even if the mold for forming the spring cover 36 is complicated and no other complicated mold structure can be added, a simple and compact structure for forming the fastener main body 30 of the present embodiment is provided. The production mold part can be easily added to a part of the whole mold of the spring cover 36.

In the fastening state in which the pin member 42 is inserted into the cylindrical hole 54, the pin member 42 is not held only by friction with the cylindrical hole 54, but is engaged with the engaging member 52 and the support structure. Since the pin member 42 is supported by being engaged with the engaging portion-equipped slit 46, the force with which the pin member 42 is prevented from coming off due to a dimensional error in manufacture of the pin member 42, the cylindrical portion 40, and the like can be prevented from fluctuating. Can be manufactured without requiring extremely high precision.

Next, a second embodiment of the fastener according to the present invention will be described with reference to FIGS. In the second embodiment, a locking projection is provided in the cylindrical hole 54,
The pin member is provided with a concave portion that engages with the protrusion.

As shown in FIG. 11 and FIG.
Is such that its free end (the lower end as viewed in FIG. 11) is extended from the above-described cylindrical portion 40 of the first embodiment, and the inner diameter of the end portion of the cylindrical hole 54 is narrowed to this extended portion. A receiving portion 86 extending in a triangular cross section toward the center of the opening of the cylindrical hole 54 is provided.

A locking projection 88 is provided at a portion of the inner wall of the cylindrical hole 54 at a predetermined distance from the receiving portion 86 along the axial direction of the cylindrical portion 40 (40A, 40B). . The locking projection 88 has a semicircular shape when viewed from the bottom as shown in FIG. 12, and has a substantially triangular longitudinal section as shown in FIG. The locking projection 88 is formed with a guide slope 88A that is smoothly inclined from the pin member 42 side in the cylindrical hole 54 toward the receiving portion 86 and protrudes into the cylindrical hole 54, and the receiving portion is formed from the top of the guiding slope 88A. A locking side 88B, which is a slope that is steeply inclined to the 86 side, is formed. Note that two narrow groove-shaped slits 44 are formed in the cylindrical portion 40 so as to face each other in the diameter direction.

As shown in FIGS. 10 and 11, the pin member 42 has a portion (a fixed mold, not shown) and a movable mold (not shown) integrally connected to the cylinder 40 from its free end. (A boundary portion with the slide pin as a part of the pin member), a through groove 90 having a semicircular shape in plan view is provided linearly along the axial direction of the pin member 42 as shown in FIG. That is, the pin member 42 is provided with the engagement protrusion 92 formed so as to fill the through groove 90 in the connection portion 42A with the cylindrical portion 40. This through groove 90
And the engaging projection 92 subsequent thereto are arranged in a straight line with the locking projection 88 in the cylindrical hole 54.

In order to manufacture the fastening body 30 constructed as described above by injection molding, a fixed type, a movable type and a slide pin can be used, for example, as in the first embodiment. In this case, although not shown, a ridge for forming the through groove 90 is provided in a recess for forming the fixed pin member 42. Further, a concave portion for forming the locking projection 88 is provided at a predetermined position on the peripheral surface of the male portion for the cylindrical hole of the slide pin.

When using the mold having the above structure,
In the fixed mold, the ridge in the fixed mold concave portion can be removed along the straight through groove portion 90, so that the mold can be directly cut out.

However, from the slide pin, the fastening body 30
When the die is to be die-cut, a so-called forced punching method as shown in FIG. 14 is performed. When performing this forcible removal method, the cylinder 4
The piece 40A provided with the locking projection 88 in the cylindrical hole 54 divided by the pair of zero slits 44 is elastically deformed by a small angle to pass the male part 76 for the cylindrical hole. Also, the one-side portion 40B of the cylindrical portion 40 where the locking projection 88 is not provided is only required to separate the receiving portion 86 from the male portion 76 for the cylindrical hole, and is elastically deformed by an angle corresponding to this.

Further, since the engaging projection 92 of the pin member 42 is set at the boundary between the fixed die and the slide pin, if these fixed die and the slide pin are separated,
Since the engaging projection 92 in the recess of the fixed mold can be pulled out, there is no hindrance at all when the molds are cut out. Therefore, in order to form the protruding engagement projection 92, a metal mold having a simple configuration without using a complicatedly disassembled and combined metal mold such as a metal mold that slides a part of the metal mold for die cutting is used. Can be manufactured in a mold.

Since the structure, operation, and effects of the second embodiment other than those described above are the same as those of the first embodiment, the same reference numerals are given to the same members, and details thereof will be described. Detailed description is omitted.

In each of the above-described embodiments, the structure in which the cylindrical portion 40 is inserted into the through hole 84 has been described.
Any shape can be applied as long as the shape of the hole into which the hole is to be inserted is such that the hole deeper than the hole entrance has a larger diameter.

[0047]

The fastening body of the present invention has a simple structure,
It has an effect that it can be easily manufactured by ordinary processing, and can be easily manufactured even when integrally molded with a part of the resin part.

[Brief description of the drawings]

FIG. 1 is a plan view showing a pin member portion of a fastening body according to a first embodiment of the present invention.

FIG. 2 is a cross-sectional view corresponding to a cross-section taken along line 2-2 of FIG. 1, showing a state where the fastening body according to the first embodiment of the present invention is arranged at a place where the fastening body is fastened.

FIG. 3 is a bottom view of FIG. 2 showing a tubular portion of the fastening body according to the first embodiment of the present invention.

FIG. 4 is a sectional view taken along the line 4-4 in FIG. 2, showing a state where the fastener according to the first embodiment of the present invention is arranged at a place where the fastener is fastened;

FIG. 5 is a partially cutaway side view corresponding to a cross section taken along line 5-5 of FIG. 1, showing a state in which the fastening body is fastened from the state of FIG. 2 according to the first embodiment of the present invention.

FIG. 6 is a partial cross-sectional schematic perspective view showing a fastening state of the fastening body according to the first embodiment of the present invention.

FIG. 7 is a cross-sectional view corresponding to the line 5-5 in FIG. 1 and showing a state in which the fastener according to the first embodiment of the present invention is manufactured using a mold.

FIG. 8 is a view illustrating a state in which the fastening body according to the first embodiment of the present invention is manufactured by a mold and the mold is forcibly removed;
It is sectional drawing equivalent to a line cross section.

FIG. 9 is a perspective view schematically showing a spring cover of the retractor provided with the fastening body according to the first embodiment of the present invention.

FIG. 10 is a plan view showing a pin member of a fastening body according to a second embodiment of the present invention.

FIG. 11 is a view showing a state where the fastening member according to the second embodiment of the present invention is disposed at a place where the fastening body is fastened;
It is sectional drawing equivalent to 1 line cross section.

FIG. 12 is a bottom view of FIG. 11 showing a tubular portion of a fastening body according to a second embodiment of the present invention.

FIG. 13 is a sectional view showing a fastening state of the fastening body shown in FIG. 11 according to the second embodiment of the present invention.

FIG. 14 is a cross-sectional view showing a state in which the fastener of FIG. 11 according to the second embodiment of the present invention is manufactured using a mold and the mold is forcibly removed.

FIG. 15 is a cross-sectional view showing a state where the conventional fastening body is arranged at a place where the fastening body is fastened.

FIG. 16 is a cross-sectional view showing a state where a conventional fastening body is manufactured with a mold and the mold is forcibly removed.

FIG. 17 is a sectional view showing a fastening state of a conventional fastening body.

[Explanation of symbols]

 Reference Signs List 30 fastening body 36 spring cover (attached member) 40 cylinder 42 pin member 46 slit with anchoring portion (supporting structure) 48 mooring protrusion (supporting structure) 50 supporting protrusion (supporting structure) 52 engagement Member 54 Cylindrical hole 58 Fixed type 60 Movable type 62 Slide pin 76 Male portion for cylindrical hole 78 Male portion for slit with attachment portion 80 Recess for mooring protrusion 82 Recess for support protrusion 84 Through hole 86 Receiving portion (support structure portion) 88) Locking projection (support structure) 90 Through groove 92 Engagement projection

Claims (2)

[Claims] 1. A fastening member provided in the attached member for fitting into the hole of the support member to fasten the attached member, wherein a tubular portion having a tip portion penetrated into the hole; A pin member having a distal end portion integrally connected to the attached member via a breakable connection portion at a base end portion of the cylindrical hole of the cylindrical portion, and a mold for molding the cylindrical portion side. An engaging member integrally formed with the pin member so that the pin member can be removed by separating the mold for molding the pin member side, and the pin member breaks a connection portion with the cylindrical portion. Then, in a state where the outer diameter of the cylindrical portion is enlarged by being inserted into the cylindrical hole and fastened to the hole portion, the pin member is engaged with the engaging member and the pin member comes out of the cylindrical hole of the cylindrical portion. A fastening structure, comprising: 2. The cylindrical portion is formed so as to gradually increase in thickness from a side where the pin member is formed to a free end side, and the cylindrical portion has a free end portion. The fastening body according to claim 1, wherein a slit for opening is formed, and the support structure portion for engaging the engaging member is provided in the slit.