JPH059237Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a temporary fixing structure for mounting screws in a vehicle rear view mirror.

[Conventional technology] Traditionally, rearview mirrors as vehicle accessories have been manufactured by specialized mirror manufacturers, but upon shipment, the mirror parts are temporarily assembled with mounting parts for the vehicle and then delivered to the vehicle assembly plant of the vehicle manufacturer. This is required, and they are assembled to the door window or the outer panel of the vehicle body using mounting screws on the vehicle assembly line.

In the above temporary assembly stage, the mounting panel 13 and the mirror base 11 that supports the mirror body can be attached and detached via the vehicle mounting screws 16 and the slotted holes 13a provided in the mounting panel, and the vehicle mounting screws 1
6 is attached to the boss 14 so that a predetermined clearance l is set between the end of the boss 14 having the screw hole 15 formed on the back surface of the base and the head of the mounting screw 16, as shown in FIG. It had been loosely screwed together and temporarily fastened.

[Problems to be solved by the invention] However, since the mounting screw 16 was screwed into the boss 14 by an operator using a tightening tool such as a screwdriver, the mounting screw may not be tightened too shallowly or may be screwed in too much. There were many variations, making it difficult to maintain and manage the specified clearance l.

In addition, problems such as mounting screws loosening or falling off have occurred due to handling during shipping and delivery, and vibrations during transportation.

The purpose of the present invention is to solve the above-mentioned conventional problems and to provide a rearview mirror that can be temporarily fixed to the mirror base while maintaining a relatively accurate clearance, without the vehicle mounting screws loosening and coming off. be.

[Means for Solving the Problems] In order to achieve the above object, the temporary fixing structure of the present invention has a boss having an insertion hole for a vehicle mounting screw protruding from the rear surface of the mirror base, and The part from the opening end of the hole to a predetermined depth is a female thread forming part, the remaining part of the insertion hole is a non-female thread part, and the vehicle mounting screw is a tapping screw, and the tapping screw is screwed into the female thread forming part. It is said that

[Function] By adopting the above means, when screwing the mounting tapping screw into the insertion hole of the boss, the screw is easily inserted into the female thread forming part, and the screw end can be easily inserted with a small force until it reaches the non-female thread part. When screwing in to a deeper depth, the screw is inserted while standing against the inner wall of the non-femally threaded part, so the tightening torque becomes extremely large.

[Example] Hereinafter, an example of the present invention will be specifically described.

In FIGS. 1 to 3, reference numeral 1 designates a mirror base for attaching a door mirror, 2 a mirror body, and 3 a mounting panel fixed to a triangular window of a vehicle. Reference numeral 4 is a boss protruding from the back surface of the base 1, and 5 is an insertion hole for a vehicle mounting screw 6 formed in the boss.

The insertion hole 5 has a female thread forming part 5a in which a female thread is previously formed between the opening end a and a position b at a required depth _l1 , and the remaining part is a non-femally threaded part in which no female thread is formed at all. 5b. As the vehicle mounting screws 6, as shown in FIG. 2, a tapping screw having a cross section with a cross section is used as an example. This tapping screw has a screw for cutting a female thread, and when the screw is inserted into the female thread forming portion 5a, the head 6a of the mounting screw protrudes from the end a of the boss 5, thereby creating a required clearance l between the vehicles. The length of the screw is such that it is formed.

When temporarily fixing the vehicle mounting screw 6 to the mirror base 1 using the vehicle mounting screw 6 configured as described above, an operator or a robot uses a tool such as a torque screwdriver to insert the mounting screw 6 into the boss portion 4. Hole 5
Screw it into place. In this case, in order to make the screwing depth of the mounting screw 6 constant, a female thread is machined in advance from the open end of the insertion hole 5 to a predetermined depth, and the female thread forming part is applied with a preset torque using a torque driver or the like. Tighten the mounting screw 6 to 5a.

The screw end of this mounting screw is the non-female thread part 5.
When the screw contacts b and starts biting into that part, the tightening torque of the screw suddenly increases and the screw tightening stops. Therefore, a constant clearance l is always maintained between the end of the boss 4 and the head 6a of the mounting screw. In addition, in the above state, the screw end of the mounting screw 6 is bitten into a part of the non-female threaded portion 5b, so the mounting screw will not loosen or fall off due to handling during shipping and delivery or vibration during transportation. Therefore, temporary fixing of the vehicle mounting panel can be easily performed.

On the other hand, when assembling to the vehicle body, the vehicle mounting screws are accurately and securely temporarily fastened onto the mirror base, so the worker must hold the mirror side with one hand.
Using the torque screwdriver with your other hand, tighten the mounting screw 6.
When tightened, since this screw is a tapping screw, it is screwed into the inner wall of the non-female threaded portion 5b of the insertion hole while cutting the thread. Therefore, the attachment screw 6 has a strong grip on the boss portion 4, and the rearview mirror can be tightened to the door panel or the outer panel of the vehicle body with sufficient tightening torque.

Note that by using tapping screws with the same pitch as metric screws, it is possible to use other mounting screws when replacing the mirror.

[Effects of the invention] As described above, according to the invention, the vehicle mounting screws can be temporarily fixed in a predetermined position on the mirror base accurately and reliably, and the shipping and handling of the mirror parts can be easily handled.
This prevents screws from coming off or the temporarily assembled state from collapsing due to cargo handling during transportation. In addition, because of the above, it can be easily and quickly assembled to the vehicle.Furthermore, the tapping action of the tapping screw allows the mounting screw to be tightened while cutting the non-female threaded part, ensuring sufficient tightening torque to ensure the vehicle This has the effect of ensuring reliable assembly.

[Brief explanation of the drawing]

Fig. 1 shows an embodiment of the present invention. Fig. 2A is a front view of the mounting screw, Fig. 2B is a sectional view of the same, and Fig. 2B is a sectional view of the mounting screw. Figure 3 is a sectional view of the main parts after the mounting screws are assembled, Figure 4 A,
Figure B shows a conventional example, Figure A is a front view of the mounting panel, and Figure B is a sectional view of the mirror base. 1...Mirror base, 2...Mirror body, 3
...Mounting panel, 4...Boss, 5...Insertion hole, 5
a... Female thread forming part, 5 b... Non-femally threaded part, 6...
...Vehicle mounting screw, 6a...Mounting screw head.

Claims (1)

[Scope of Claim for Utility Model Registration] 1. In a back mirror in which a mirror base is screwed to a mounting panel fixed to a part of the vehicle body via vehicle mounting screws, the back side of the base has an insertion hole for the mounting screw. a boss is provided protrudingly, and a portion from the opening end of the insertion hole to a required depth is a female thread forming portion;
A temporary fixing structure for a back mirror mounting screw for a vehicle, characterized in that the remaining portion is a non-female threaded portion, the vehicle mounting screw is a tapping screw, and the tapping screw is screwed into the female thread forming portion. 2. A temporary fixing structure for a rear view mirror mounting screw for a vehicle according to claim 1, wherein the screw end of the tapping screw is screwed together to a position where it touches the non-female threaded portion.