JPH11180265A - Bolt fastening structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide bolt fastening structure of high theft preventing effect hindering a bolt member from being loosened from the bolt head side. SOLUTION: A shoulder bolt 5 with a first thread part 53 of large diameter formed on the base end side and with a second thread part 54 of small diameter formed on the tip side with smaller thread pitch than the first thread part 53 is inserted through a through hole 21 formed in a plate member 2 such as window glass. A nut member 7 is fastened to the first thread part 53 of the shoulder bolt 5 to fix the base end side of the shoulder bolt 5 to the plate member 2. The second thread part 54 of the shoulder bolt 5 is inserted through a through hole 43 formed in another member 4, and a second nut member 8 is fastened to the second thread part 54 so as to hold another member 4 by the first nut member 7 and second nut member 8 to fix it.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bolt fastening structure for fixing another member to a plate member, particularly a glass plate or a resin plate.

[0002]

2. Description of the Related Art As shown in FIG. 2, a vehicle such as a van type or a wagon type has a window opening 11 of a back door 1 thereof.
There is a structure that is opened and closed by a glass hatch 2 of a flip-up type. This type of glass hatch 2 is supported on the vehicle body or the back door 1 via hinge members at the left and right ends of the upper edge so as to be vertically rotatable. And glass hatch 2
A wiper 3 is attached at the center of the lower end of the. A drive device 4 for driving the wiper 3 is mounted on the inner surface side of the glass hatch 2, and the wiper 3 is mounted on a drive shaft 41 that penetrates the glass hatch 2 and projects outward from the drive device 4. Also,
A striker 46 is attached to the driving device 4. When the glass hatch 2 is closed, the striker 46 locks the glass hatch 2 by engaging with the lock mechanism 12 installed on the lower edge of the window opening 11. Therefore, since the glass hatch 2 can be opened when the driving device 4 is removed, fixing the driving device 4 to the glass hatch 2 cannot be easily removed from the outside of the vehicle as an anti-theft measure. A special fastening structure is used.

[0003] As shown in FIG.
6 are fixed to the glass hatch 2 via bolt members 5A with projecting screw portions 57a and 57b respectively.
The bolt member 5A inserts one screw portion 57a from the inside of the glass hatch 2 into the through hole 21 of the glass hatch 2 via the spacer 6b, and fastens the button nut 7A to the screw portion 57a from the outside of the glass hatch 2. To the glass hatch 2. In this case, since the button nut 7A is a nut member for which it is difficult to engage a tool such as a spanner,
Projection 5 at the tip of the other threaded portion 57b of bolt member 5A
The button nut 7A is fastened to the screw portion 57a by engaging the tool with the bolt 8 and rotating the bolt member 5A. Also,
A rubber bush 6a is sandwiched between the glass hatch 2 and the button nut 7A to seal around the through hole 21. Then, the other screw portion 57 of the bolt member 5A
b is inserted into the through-hole 43 of the base plate 42 of the driving device 4 and the driving device 4 is fixed by tightening the nut member 8A to the screw portion 57b. In the drawing, reference numeral 44A is a cover member of the driving device 4.

[0004]

However, in the above-described fastening structure using the conventional bolt member 5A, when the bolt member 5A is fastened to the glass hatch 2 and the screw portion 57a is tightened to the button nut 7A, the nut is not used. It is difficult to fix and hold the head so that it does not rotate and the glass hatch 2 is not damaged. For this reason, when the tightening of the button nut 7A is incomplete, the nut head is gripped by a tool such as pliers and turned, and the button nut 7A is turned.
When the bolt member 5A is removed from the glass hatch 2 by loosening the glass hatch 2, the glass hatch 2 may be opened. Therefore, an object of the present invention is to realize a bolt fastening structure in which a bolt member cannot be removed from the outside of a vehicle.

[0005]

According to the present invention, in a bolt fastening structure in which a bolt member is passed through a plate member such as a window glass and the plate member is connected to another member by the bolt member, the bolt member is a base end. A large-diameter first screw portion on the side;
A stepped bolt having a small-diameter second screw portion having a smaller screw pitch than the first screw portion formed on the distal end side. The stepped bolt is inserted into a through hole formed in the plate member, and the stepped bolt is formed. Then, the first nut member is fastened to the first screw portion to fix the base end side of the stepped bolt to the plate member. The second screw portion of the stepped bolt is inserted into a through hole formed in the other member, and the second nut member is tightened into the second screw portion, so that the first nut member and the second nut member Then, the other member is fixed so as to be sandwiched therebetween (claim 1). Since the stepped bolt has a difference in screw pitch between the first screw portion and the second screw portion, even if the stepped bolt is turned in the direction of loosening from the bolt head side, the first nut member and There is a difference in the moving distance from the second nut member, and the first and second nut members cannot be loosened because they are fastened to each other with other members interposed therebetween.

The present invention is suitably used when a driving device for driving a wiper having a lock means for locking the glass hatch is mounted on a glass hatch for opening and closing a window opening of a back door of a vehicle. The stepped bolt is inserted into the through hole of the glass hatch from the outside thereof, and the first nut member is screwed into the first screw portion of the stepped bolt from the inside of the glass hatch, thereby forming the glass hatch and the first nut. The stepped bolt is fixed to the glass hatch by tightening the spacer interposed between the nut member. The second screw portion of the stepped bolt is inserted into the through hole of the drive device, and the second nut member is tightened into the second screw portion, so that the first nut member and the second nut member To fix the driving device so as to sandwich it (claim 2). Since the stepped bolt is not loosened even if it is turned from the outside of the glass hatch in the loosening direction, there is no possibility that the driving device is removed, and the effect as anti-theft measures is effectively exhibited.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which a fastening structure of the present invention is applied to mounting of a drive unit 4 of a wiper 3 on a glass hatch 2 shown in FIGS. 2 and 3 will be described. As shown in the figure, the glass hatch 2 is a glass plate having the same width as the width of the upper half of the back door 1 and the outer periphery thereof being painted. A door opening 1 of a back door 1 is supported by a door 1 so as to be vertically rotatable.
Open and close 1. The upper edge of the glass hatch 2 is a cover member 10
It is covered with.

A driving device 4 for driving the wiper 3 is attached to the inner surface of the glass hatch 2 at the lower end center position. The driving device 41 is connected to a driving shaft 41 which penetrates the glass hatch 2 and projects outward. 3 is attached. The drive unit 4 is configured to cover the wiper motor M and the base plate 42 for fixing the wiper motor M from front and rear with cover members 44A and 44 made of synthetic resin.
It is a structure covered with B. A striker 46 is fixed to one side end of the bottom surface of the driving device 4 by bolting. When the glass hatch 2 is closed, the striker 46 engages with the lock mechanism 12 installed on the lower edge of the window opening 11. To lock the glass hatch 2 in the closed state.

When the drive unit 4 is mounted on the glass hatch 2, the base plate 42 is fixed to the glass hatch 2 via the grommet 6B and the nut member 7 by a fastening structure using bolt members 5 penetrating the glass hatch 2. As shown in FIG. 1, the bolt member 5 has a button-shaped head 51 formed at the base end thereof so that a tool such as a wrench cannot be engaged. A columnar base 52 is formed. From the base 52 to the first screw 53
Are extended from the first threaded portion 53, and a small-diameter second threaded portion 54 having a smaller thread pitch than the first threaded portion 53 is extended. It is a stepped bolt having portions 53 and 54. Further, the stepped bolt 5 is provided at its tip with a prismatic projection 55 protruding from the second screw portion 54.
Is designed to engage a tool.

The stepped bolt 5 is fitted into a through hole 21 formed in the glass hatch 2 from outside the glass hatch 2. In this case, the seal packing 6A is interposed between the head 51 of the stepped bolt 5 and the periphery of the through hole 21 of the glass hatch 2.

The stepped bolt 5 fastens the first nut member 7 to the first screw portion 53 protruding inside the glass hatch 2, and provides a gap between the inner surface of the glass hatch 2 and the first nut member 7. It is fixed to the glass hatch 2 by tightening the interposed grommet 6B. The grommet 6B is a cylinder made of a synthetic resin, and has one end formed to have a small diameter that can be fitted into the through hole 21 of the glass hatch 2, and the base 52 of the stepped bolt 5 can be fitted into the grommet 6B. It has a large diameter.
The grommet 6B is inserted from the tip end of the stepped bolt 5,
The small diameter portion is fitted into the gap between the through hole 21 of the glass hatch 2 and the base 52 of the stepped bolt 5, and the first bolt 5
Is provided so as to surround the screw portion 53 of the above.

The first nut member 7 is formed by integrally forming a cylindrical large-diameter portion 72 at one end of a cylindrical portion 71 internally threaded, and the outer diameter of the cylindrical portion 71 is a grommet 6.
It is a dimension that can be inserted into B. On the other hand, the large-diameter portion 72 is hexagonal so that a tool such as a spanner can be engaged. The first nut member 7 is inserted through the distal end of the stepped bolt 5 and screwed into the first threaded portion 53 of the stepped bolt 5 so as to fit the cylindrical portion 71 into the grommet 6B. First screw part 53
When the first nut member 7 is tightened, the tool is engaged with the projection 55 at the tip of the stepped bolt 5 and the tool such as a spanner is engaged with the large diameter portion 72 of the first nut member 7. The stepped bolt 5 is rotated and tightened while the first nut member 7 is held so as not to rotate, or the first nut member 7 is rotated and tightened while the stepped bolt 5 is not rotated. Turn the side and tighten. As a result, the grommet 6B is connected to the glass hatch 2 and the large-diameter portion 7 of the first nut member 7.
2 and the stepped bolt 5 is fixed to the glass hatch 2.

The drive unit 4 is mounted by inserting the second screw portion 54 of the stepped bolt 5 into the through-hole 43 of the base plate 42 of the drive unit 4, and connecting the plate surface around the through-hole 43 to the first nut member 7. In contact with the large-diameter portion 72. Then, the second nut member 8 is tightened into the second screw portion 54 of the stepped bolt 5 penetrating the base plate 42, and the first nut member 7 and the second nut member 8
Is fixed so that the base plate 42 is sandwiched therebetween, and the driving device 4 is mounted inside the glass hatch 2. At this time, the lip 61 formed on the grommet 6B is
Of the cover member 44A around the service hole 45 to prevent the drive noise of the wiper motor or the like from leaking from the service hole 45.

The wiper 3 extends through the glass hatch 2.
Is fixed to the drive shaft 41 by tightening a nut member from outside the glass hatch 2.

When the stepped bolt 5 is rotated in the loosening direction, the difference in the screw pitch between the first screw portion 53 and the second screw portion 54 causes the first nut member 7 to move in the loosening direction. Since there is a difference between the moving distance and the moving distance of the second nut member 8 in the loosening direction, and the moving distance of the first nut member 7 is large, the first nut member 7 is loosened by the second nut member 8. Movement is hindered, and the first nut member 7 and the second nut member 8 are fastened to each other, and the stepped bolt 5 cannot be loosened. Accordingly, even if the head 51 of the stepped bolt 5 is gripped from the outside of the glass hatch 2 with a tool such as a plier and the stepped bolt 5 is turned in the loosening direction, the stepped bolt 5 does not become loose, 4, the glass hatch 2 cannot be opened, and there is no risk of theft.

The present invention is effectively applied to a bolt fastening structure in which another member for connecting the same to a base is fixed to the back surface of a door or window by bolts, and a bolt head appears on the outer surface of a door or window. You.

[0017]

According to the fastening structure of the present invention, it is impossible to remove the bolt member from the bolt head side (outside), and it is possible to realize a bolt fastening structure sufficiently exhibiting the effect of anti-theft measures.

[Brief description of the drawings]

FIG. 1 shows a fastening structure of the present invention. FIG. 1 (A) is a sectional view taken along a line IA-IA in FIG. 2, and FIG. 1 (B) is an exploded view thereof.

FIG. 2 is a front view of a glass hatch of a vehicle to which the present invention is applied.

FIG. 3 is an exploded perspective view showing the glass hatch, a wiper attached to the glass hatch, and a driving device.

FIG. 4 is a cross-sectional view showing a conventional fastening structure and corresponding to FIG.

[Explanation of symbols]

 Reference Signs List 1 back door 11 window opening 2 glass hatch (plate member) 21 through hole 4 driving device (other member) 43 through hole 46 striker (locking means) 5 stepped bolt (bolt member) 53 first screw portion 54 second Screw part 6B Grommet (spacer) 7 First nut member 8 Second nut member

Claims (2)

[Claims] 1. A bolt fastening structure in which a bolt member is made to penetrate a plate member such as a window glass, and the plate member is connected to another member by the bolt member. A stepped bolt having a threaded portion and a small-diameter second threaded portion having a smaller thread pitch than the first threaded portion formed at the distal end side, and inserting the stepped bolt into a through hole formed in the plate member; The first nut member is fastened to the first screw portion of the stepped bolt to fix the base end side of the stepped bolt to the plate member, and the second screw portion of the stepped bolt is formed on the other member. A bolt inserted into the through hole and tightening a second nut member in a second screw portion to fix the first nut member and the second nut member so as to sandwich another member. Fastening structure. The plate member is a glass hatch that opens and closes a window opening of a back door of a vehicle, and the other member is a driving device for driving a wiper having a lock unit that locks the glass hatch in a closed state. The stepped bolt is inserted into the through hole of the glass hatch from the outside thereof, and the first nut member is tightened from the inside of the glass hatch into the first screw portion of the stepped bolt, thereby forming the glass hatch and the first bolt. The stepped bolt is fixed to the glass hatch by tightening the spacer interposed between the stepped bolt and the nut member, and the second screw portion of the stepped bolt is inserted into the through hole of the driving device, and
2. The bolt fastening structure according to claim 1, wherein the second nut member is fastened to a screw portion of the first nut member, and the first nut member and the second nut member are fixed so as to sandwich the driving device. 3.