JPH075286Y2 - Fastener - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION << Industrial Application Field >> The present invention relates to a fastener having a sealing property suitable for attaching a mounting member such as a component to a mounted member.

<< Prior Art >> FIG. 5 shows a conventional example in which parts such as a vehicle lamp are attached by fasteners. The fastener 1 of the same figure is provided with an engaging portion 2 formed of a lower and upper tubular body and a flange portion 3 integrated with an end portion located above the engaging portion, and is a member to be attached such as a vehicle body panel. Insert the engaging part 2 into the mounting hole of 4 and tap the tapping screw 6
The mounting member 7 is mounted on the mounted member 4 by screwing the mounting member 7 through the mounting hole of the mounting member 7 into the engaging portion 2.
In addition, a ring-shaped seal member 9 is interposed on the lower surface of the flange portion 3 that restricts the engagement portion 2 from being inserted, and the attachment member 2 is inserted from the attachment hole of the attachment member 4 into which the engagement portion 2 is inserted. The inside of the is sealed to prevent water from entering it.

By the way, such a seal member 9 may be individually inserted into the engaging portion 2 of the fastener 1 when the mounting member 7 is mounted, but in the standardized fastener 1, a large number of them are continuously used. It is preferable to insert it in the engaging portion 2 of the fastener 1 in advance and to assemble it for reasons such as the above because of work efficiency. Therefore,
Generally, the assembly of the seal member is performed in a step before being supplied to the step of attaching the attachment member 7 such as when the seal member 9 is attached to the fastener 1 and the like.

<< Problems to be Solved by the Invention >> However, this type of fastener requires poor man-hours for assembling the seal member 9 and has poor workability. Moreover, since the seal member is only inserted into the engaging portion of the fastener, the seal member once assembled may be unexpectedly removed during packaging, transportation, or use.

Incidentally, Japanese Utility Model Laid-Open No. 51-89967 discloses a technique in which a seal lip corresponding to the seal member is integrally formed with a fastener. This fastener has a relatively large pedestal provided on the upper portion of the above-mentioned engaging portion to install the attachment member, and a cap-shaped seal lip is formed on the lower portion of the pedestal, When the seal lip is pressed against the member to be attached from above, the seal lip elastically bends from the cap-like shape to the flat shape and comes into water-tight contact. However, although the structure in which the seal member is integrally formed as described above can solve the above-mentioned problems, it cannot be adopted because it causes a new problem when applied to the fasteners of FIGS. 5 and 4. . In the structure in which the flange portion 3 is on the upper end side of the engaging portion 2, if the flange portion 3 is made to have elasticity as in the above-mentioned publication, it is difficult to satisfy the strength of the fastener main body because the whole is made of the same material. As a result, a strong tightening engagement cannot be obtained. Further, when the engaging portion 2 is inserted into the attachment hole and temporarily attached to the attached member, the flange portion formed in a cap shape becomes unstable and easily comes off. Moreover, in the case of the anaker type as the engaging portion, that is, in the structure in which the engaging portion 31 is elastically inserted into the mounting hole and is prevented from being pulled out as represented by FIG. 4, the cap-shaped flange portion is elastically restored. The force acts in the disengagement direction, resulting in lack of reliability.

Further, in Japanese Utility Model Laid-Open No. 62-174108, a technique of integrally forming a sealing body made of a soft synthetic resin on the lower surface of the flange portion of the fastener on the leg portion on the leg portion by a different material molding method. Is disclosed. However, in this way, when the seal body made of a different material is simply formed by integral molding on the flange portion, the joint strength is weak because it is made of a different material, and the fastener itself comes off during the transportation process or the fastener itself is removed for maintenance or the like. There is also a risk that the seal body may come off when reused and cannot be reused.

The present invention has been made in view of such circumstances, and an object of the present invention is to provide a fastener that eliminates the step of assembling a seal member, is less likely to come off in a temporarily attached state, and has improved work efficiency.

<< Means for Solving the Problems >> In order to achieve the above object, the present invention has an engaging portion integrally provided on the lower surface of the flange portion at the upper end, and the engaging portion is attached. In a fastener made of a hard resin that attaches a mounting member to a mounted member in a state of being inserted into a mounting hole provided in a member, the flange portion is provided substantially at right angles to an axis of the engaging portion, In a through hole having a sealing member made of a soft resin integrally formed by two-color molding so as to project outward from the lower surface of the flange portion and the outer peripheral portion thereof, and a part of the sealing member penetrating vertically in the flange portion. It is characterized in that it is influx into.

<< Operation >> According to the above configuration, the mounting hole of the mounted member is reliably sealed by the sealing member made of the soft resin integrated with the lower surface of the flange portion.

In this case, in the fastener of the present invention, the flange portion is provided substantially at right angles to the axis of the engaging portion, and the sealing member is integrally formed so as to project outward from the lower surface of the flange portion and the outer peripheral portion thereof. Therefore, it is in close contact with the mounting surface of the mounted member due to a weak pressing force, and is difficult to come off or come off in a state of being temporarily mounted in the mounting hole of the mounted member. Further, since a part of the sealing member is made to flow into and solidify in the vertical through hole of the flange portion, the sealing member is reliably and firmly integrated with the flange portion.

<< Embodiment >> An embodiment of the present invention will be described in detail below with reference to the accompanying drawings.

FIG. 1 shows a first embodiment in which the present invention is applied to a grommet type fastener. The fastener 10 of the figure is formed by two-color molding, the engaging portion 11 and the flange portion 12 provided on the upper portion thereof, and the seal member 13 integrated with the flange portion 12 are made of different resin materials. There is.

A hard resin such as polyamide or polypropylene is used for the material of the engaging portion 11 and the flange portion 12 as in the conventional case.

The engaging portion 11 is composed of a lower tubular body having a rectangular cross section, and has a structure in which a screw or the like is screwed. The engaging portion 11 is provided with slits 11a on the inner wall for assisting the expansion from the upper part to the lower part at four positions on the inner circumference, and a pair of gradually projecting from the intermediate part to the upper part on the outer surface. Engaging claws 11b are formed opposite to each other. Further, the flange portion 12 integrated around the upper portion of the engaging portion 11 is provided in a circular shape at a position slightly lower than the end surface of the engaging portion, and the opening and slit of the engaging portion 11 are formed in the circular center portion. The upper opening of 11a is exposed. A through hole 12 is formed near the outer periphery of the flange 12.
a is provided at four places, and a pair of standing walls 12b is provided on the upper surface.
Are formed so as to be flush with the end surface of the engaging portion 11.

The material of the seal member 13 is a soft resin such as polyester or elastomer, or a rubber material. The sealing member 13 is provided so as to cover the lower surface and the upper surface of the flange portion 12 substantially, and the flange portion 13a is formed obliquely downward on the outer periphery to obtain a good sealing effect. The seal member may be formed so as to be able to come into contact with each other at least in a plane and provided so as to project outward from the lower surface of the flange portion 12 and its outer peripheral portion.

The fastener 10 having such a configuration is formed by a two-color injection molding machine including two injection cylinders, and for example, the hard resin melted from one cylinder is supplied to the cavity of the molding die to engage the engaging portion 11 The flange 12 is injection-molded, and then the movable side of the molding die is rotated to supply the melted soft resin from the other cylinder to injection-mold the seal member 13. In this case, the seal member
The melted soft resin 13 covers the surface from the lower surface of the flange portion 12 and flows into the through hole 12a, so that it is firmly integrated with the flange portion 12 and is hard to come off.

FIG. 2 shows the state of use of the fastener, which will be described below with reference to FIG.

First, the fastener 10 is mounted in a mounting hole 15 provided in a mounted member 14 such as a vehicle body. In this case, the engaging part
By inserting 11 and bringing the seal member 13 on the lower surface of the flange portion 12 into contact with the mounted member 14, the upper portion of the engaging portion is elastically engaged with the mounting hole 15. Next, while positioning the mounting member 16 such as a vehicle lamp on the mounted member 14,
After the mounting hole 17 provided in the mounting member 16 and the opening of the engaging portion 11 are aligned with each other, the tatsu pin screw 18 is inserted from the mounting hole 17 into the engaging portion 11.
It is screwed inside. As a result, in the fastener 10, the engaging portion 11 is expanded by the tapping screw 18 to be firmly fixed to the mounted member 14, and the mounting member 16 includes the flange portion 12 and the sealing member.
It is fixed to the attached member while pressing 13 toward the attached member 14. Further, in this fixing, since the engaging portion 11 is elastically fitted into the mounting hole 15, and the seal member 13 and the flange portion 13a are pressed surface-wise and elastically around the mounting hole 15. ,
The mounting hole is completely sealed so that water or the like does not enter the mounted member 14.

FIG. 3 shows a modification of the fastener. The fastener 20 shown in the figure has substantially the same structure as that of the fastener 10. The engaging portion 11 is inserted into the attaching hole 17 of the attaching member 16 and the attaching hole 15 of the attached member 14, and the tapping screw 18 is engaged. The mounting member 16 is mounted and fixed by being screwed into the joint 11.

In this case, the seal member 13 integrated with the flange portion 12
The surface of the tapping screw 18 is pressed against the mounting member 16 by the head of the tapping screw 18, and as a result, the mounting hole 17 is sealed. Therefore, the present invention can completely prevent water from entering the mounted member 14 even by using the fastener 20.

FIG. 4 shows a second embodiment in which the present invention is applied to an anchor type fastener.

The plastic fastener (30) regulates an arrow-shaped engaging portion (31) which is elastically inserted into each of the mounting holes of the mounted member (14) and the mounting member (16) to prevent the engaging portion (31) from being inserted. A flange portion 32 and a seal member 33 formed by two-color molding on the flange portion 32 are provided. Even if the present invention is applied to such an anchor type fastener 30, the same sealing effect as described above can be obtained.

<Effects of the Invention> As described above, in the fastener of the present invention, a hard resin is used as the material of the fastener body, and a sealing member made of a soft resin is formed by two-color molding, and Since a part of the seal member is made to flow into and solidify in the vertical through hole of the flange portion, the seal member is reliably and firmly integrated with the flange portion, and is unlikely to come off, so that the overall design strength is easily satisfied. Moreover, since the flange portion is provided substantially at right angles to the axis of the engaging portion, and the seal member is integrally formed so as to project outward from the lower surface of the flange portion and the outer peripheral portion thereof, the mounting surface of the mounted member In contrast, it adheres to the surface by a weak pressing force, and is hard to come out when it is temporarily attached to the mounting hole of the mounted member and is stable, so it can be applied to the anchor type as illustrated in Fig. 4 without impairing the reliability. it can.

[Brief description of drawings]

FIG. 1 is a partially cutaway perspective view showing a fastener as a first embodiment of the present invention, FIG. 2 is a sectional view showing a usage state of the fastener, and FIG. 3 shows a modified example of the fastener. FIG. 4 is a sectional view showing a state of use, FIG. 4 is a schematic sectional view showing a fastener as a second embodiment of the present invention, and FIG. 5 is an explanatory sectional view showing a mounting state of a mounting member as a conventional example. 10,20,30 …… Fastener 11,31 …… Engagement part 12,32 …… Flange part 12a …… Through hole 13,33 …… Seal member 14 …… Mounted member 16 …… Mounting member

Claims (1)

[Scope of utility model registration request] 1. An engaging member integrally provided on a lower surface of a flange portion at an upper end, the mounting member being attached with the engaging portion being inserted into an attaching hole provided in the attached member. A fastener made of a hard resin to be attached to a member, wherein the flange portion is provided substantially at right angles to the axis of the engaging portion, and is formed by two-color molding so as to project outward from the lower surface of the flange portion and its outer peripheral portion. A fastener having an integrally formed sealing member made of a soft resin, wherein a part of the sealing member flows into and solidifies into a through hole that vertically penetrates the flange portion.