JP2005022451A - Hood fastening device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a hood fastening device including a striker which can be drawn in by a motor to generate fixation, capable of suppressing increase of the motor load even when the operation approaches the ultimate draw-in position where the pull-up force of a hood is large. <P>SOLUTION: The hood fastening device is equipped with the striker fixed to the hood, a base plate 3 fixed to the vehicle body, a slide plate 4 installed on the base plate 3, a latch installed on the slide plate 4, a cam 8 attached to the base plate 3, and a motor to rotate the cam 8, wherein a projection 17 is provided on the slide plate 4 while the cam 8 is provided with a cam hole 29 to slide the projection 17 in the directions in which the striker comes in contact and separates, and when the striker is engaged with the latch, the cam 8 rotates in the direction of drawing in the projection 17 to the side opposite the hood, and therein the shape of the cam hole 29 is such that the draw-in amount lessens gradually when the projection 17 approaches the ultimate draw-in position. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a hood fixing device for fixing a hood provided in an open car so as to be freely opened and closed.
[0002]
[Prior art]
Automobiles that do not have a car roof usually have a hood to cover the passenger compartment when it is cold or rainy. Such a hood is generally open and closed by fixing the base end of the hood to the rear of the car body and moving the tip, but when it is not used, Not only does it obstruct the field of view behind you, but it also looks bad and gets dusty and dirty or fading.
For this reason, when the hood is not used, it may be stored in the rear part of the vehicle body and covered with a lid, and the hood may be opened by opening the lid when used.
Therefore, after separating the hood from the vehicle body, taking out the hood from the storage location, closing the lid, then placing the hood on the lid, and fixing the base end of the hood to the vehicle body side with a locking device. Is desirable.
[0003]
By the way, as a locking device for an automobile, a striker is fixed to one of the door and the vehicle body, and a latch is attached to the other, and the latch is rotated by an impact when the door collides with the vehicle body, and the striker is held by the latch. A device that locks the door in place is known (see Patent Document 1 and Patent Document 2).
In the conventional locking device, the pull-in length from the position where the striker collides with the latch to the closed position is the distance that the notch that engages with the striker moves as the latch rotates, and is about 5 to 7 mm. There was only it.
With a door lock device that fixes a hard and strong door in contact with the opening edge of the vehicle body, this amount of pulling is sufficient, but when fixing a telescopic hood to the vehicle body side, With such a small amount of pull-in, there is a concern that there will be a gap between the hood and the car body when it vibrates during travel.
[0004]
[Patent Document 1]
JP-A-12-27511 [Patent Document 2]
Japanese Patent Laid-Open No. 2001-193328
[Problems to be solved by the invention]
In this invention, by operating the motor and rotating the cam, the striker engaged with the latch can be drawn in a large amount, and the hood can be sufficiently pulled and fixed to the vehicle body side. It is an object of the present invention to provide a hood fixing device capable of suppressing an increase in load on a motor even when approaching an extreme position of entrainment.
[0006]
[Means for Solving the Problems]
The hood fixing device of the present invention includes a striker fixed to the hood, a base plate fixed to the vehicle body side, and a slide plate attached to the base plate so as to be slidable along the contact / separation direction of the striker. A latch that is rotatably provided on the slide plate, and is engaged with and disengaged from the striker along with the rotation; a cam that is rotatably attached to the base plate; and a motor that rotates the cam. The slide projection is provided on the slide plate, and the cam is engaged with the slide projection to form a cam hole that slides the slide projection in the contact / separation direction of the striker as the cam rotates. When the striker is engaged with the latch, the motor is operated to rotate the cam in a direction in which the slide protrusion is retracted to the opposite side of the hood. , Said when the slide projection is close to the extreme positions of the pull, a shape pull-in amount is reduced gradually.
[0007]
When fixing the hood, the striker fixed to the hood collides with the latch, and the impact rotates the latch. When the striker and the latch are engaged, the motor operates to rotate the cam and slide. The plate and the latch provided on the plate slide to the opposite side of the hood, and thereby the striker engaged with the latch is largely drawn together with the hood toward the vehicle body.
When the striker, latch, and slide plate approach the extreme position of pull-in, the force that the hood tries to pull up the latch and slide plate gradually increases, but the pull-in amount of the slide protrusion gradually decreases, so the cam rotates with a small force. The load applied to the motor can be suppressed by canceling the increase in force to reverse the cam.
A guide hole is formed in the base plate along the contact / separation direction of the striker, and the slide protrusion is slidably engaged with the guide hole. In the cam hole, the slide protrusion is located at the end opposite to the top of the guide hole. The shape of the portion that engages when approaching may be such that the angle of intersection with the guide hole gradually approaches a right angle as the cam rotates.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
As shown in FIG. 7A, the hood fixing device A of the present invention is a device for fixing the base end portion of the hood a to a lid c that can be opened and closed on the vehicle body b side. When closing the hood a including the striker 1 fixed to the base end and the main body mechanism 2 attached to the lid c, the hood fixing device A is released as shown in FIG. Remove the base end of the hood a from the vehicle body b side, then open the lid c and fold the hood a as shown in FIG. 7C, and then fold as shown in FIG. The hood a is stored in the rear part of the vehicle body b and the lid c is closed.
[0009]
The striker 1 is formed by bending a metal bar into a gate shape, and is fixed to the base end portion of the hood a so as to protrude toward the vehicle body b (FIGS. 3 and 4).
As shown in FIGS. 1 to 5, the main body mechanism 2 includes a base plate 3 fixed to the lid c, a slide plate 4 slidably attached to the base plate 3, and a cover plate 5 fixed to the slide plate 4. And a latch 6 and a detent lever 7 that are rotatably attached to the cover plate 5, a cam 8 that is rotatably attached to the base plate 3, and a motor 9 that rotates the cam 8.
[0010]
The base plate 3 is fixed to the hood fixing portion of the lid c by screws or the like. Further, as shown in FIGS. 1 and 2, long holes 10 along the vertical direction (the direction of contact and separation of the striker 1) are formed on both sides of the base plate 3, and between the left and right long holes 10, A slightly short guide hole 11 is formed parallel to this.
As shown in FIGS. 3 and 4, the slide plate 4 is installed on the surface of the base plate 3, and flanges 12 that are bent toward the base plate 3 and project outward are formed on both sides of the slide plate 4.
[0011]
As shown in FIG. 6, sliders 15 each having a shaft 13 and a head 14 are attached to the upper and lower portions of the left and right flanges 12. The diameter of the shaft 13 is slightly smaller than the width of the long hole 10 of the base plate 3, and the diameter of the head 14 is formed to be larger than the width of the long hole 10, and the shaft 13 is inserted into the long hole 10 via the washer 16. The slide plate 4 is slidably attached to the base plate 3 along its long hole 10.
On the rear surface of the intermediate portion of the slide plate 4, a slide protrusion 17 is slidably engaged with the guide hole 11 of the base plate 3 (FIGS. 1 and 2).
In addition, between the left and right elongated holes 10 and the guide holes 11, between the base plate 3 and the slide plate 4, the slide plate 4 is biased upward (toward the top). A first spring 18 and a second spring 19 are installed (FIG. 4).
[0012]
As shown in FIGS. 3 and 4, the cover plate 5 is fixed to the surface of the slide plate 4 (surface opposite to the base plate 3), and a striker entrance 20 is formed at the upper middle portion thereof.
A latch 6 is attached to one side of the cover plate 5 across the striker entrance 20 via a first shaft 21, and a detent lever 7 is latched to the other side via a second shaft 22. 6 is attached so as to be adjacent.
[0013]
A notch 23 that can be engaged with the striker 1 is formed on the outer periphery of the latch 6, and a contact surface 24 is formed at one end of the notch 23. In the open state where the striker 1 is not engaged, the contact surface 24 faces the hood a across the striker entrance 20 of the cover plate 5.
Then, when the striker 1 enters the striker entrance 20 and collides with the contact surface 24, the impact causes the latch 6 to rotate clockwise in the figure, and the notch 23 holds the striker 1 while swallowing the striker 1. The closed state crosses 20 at a substantially right angle. In this state, the striker 1 cannot escape from the notch 23.
Further, the outer peripheral surface facing the detent lever 7 of the latch 6 is formed in an arc shape continuously to the contact surface 24.
[0014]
An engaging protrusion 25 is formed on the side edge of the detent lever 7 facing the latch 6. In addition, a third spring 26 is interposed between the latch 6 and the detent lever 7, and the third spring 26 causes the engagement protrusion 25 of the detent lever 7 to approach the latch 6 (right side of the figure). Rotating direction).
Note that the latch 6 is biased by the third spring 26 in the opening direction (counterclockwise direction in the figure).
[0015]
When the latch 6 is in the open state and the contact surface 24 crosses the striker entrance 20, the engagement protrusion 25 of the detent lever 7 is in contact with the arc-shaped outer periphery of the latch 6.
When the striker 1 collides with the contact surface 24 and starts to rotate clockwise, the engagement protrusion 25 moves along the outer peripheral surface of the latch 6, and when the latch 6 is closed, the engagement protrusion 25 hits. Engage with the surface 24 to restrict its left rotation (rotation in the opening direction).
[0016]
When the detent lever 7 located at the rotation restricting position for restricting the rotation of the latch 6 is rotated and turned counterclockwise against the urging force of the third spring 26, the engagement protrusion 25, the contact surface 24, Is disengaged and pulled by the third spring 26, and the latch 6 rotates at a stroke to the open position.
Such an engagement / disengagement mechanism for the striker 1, the latch 6 and the detent lever 7 is well known in the art and will not be described with reference to the drawings.
Note that the latch 6 is moved to the closed position at the position facing the detent lever 7 of the cover plate 5 to detect that the detent lever 7 has been rotated to the rotation restricting position, and the motor 9 is operated, and the detent lever 7 is returned from the rotation restricting position to the original position, and a first switch 27 for reversing the motor 9 is installed by sensing that the latch 6 has rotated to the open position.
[0017]
As shown in FIGS. 1 and 2, the cam 8 is attached to the back surface of the base plate 3 so as to rotate around a third shaft 28 provided below the guide hole 11.
The cam 8 is provided with a cam hole 29 that is curved so that the distance from the third shaft 28 gradually increases from one end to the other end, and the slide projection 17 of the slide plate 4 is formed in the cam hole 29. It is slidably engaged.
As shown in FIG. 5, the cam 8 is connected to the motor 9 via the geared cable 30. When the motor 9 rotates in the forward and reverse directions, the cam 8 rotates in both the left and right directions.
[0018]
When the motor 9 is actuated to rotate the cam 8, the slide protrusion 17 engaged with the cam hole 29 contacts and separates from the third shaft 28 and slides between the upper end and the lower end of the guide hole 11. As a result, the slide plate 4 and the latch 6 and the detent lever 7 attached to the slide plate 4 via the cover plate 5 move in the vertical direction with respect to the base plate 3. At this time, since the slide plate 4 is supported by the base plate 3 at four points by engaging the sliders 15 provided on the upper and lower sides of the slide plate 4 with the long holes 10, the slide plate 4 slides smoothly without shaking. To do.
The length of the guide hole 11, that is, the elevation distance of the slide plate 4 is about 40 mm.
Further, as shown in FIGS. 1 and 2, the cam 8 is urged by the fourth spring 31 in the direction in which the slide protrusion 17 rises (clockwise direction in the drawing).
[0019]
One end of the cam hole 29 (the end close to the third shaft 28) is substantially linear over a relatively long distance, the other end is formed in a straight line with a shorter distance, and the intermediate portion is substantially Curved in an arc. When the slide protrusion 17 is engaged with both end portions of the cam hole 29 and both end portions of the guide hole 11, the cam hole 29 intersects the guide hole 11 substantially at a right angle.
Therefore, when the slide protrusion 17 is engaged with both ends of the cam hole 29, that is, when the slide plate 4 is at the upper limit position and the lower limit position, the slide protrusion 17 is slid along the guide hole 11. Therefore, even if the striker 1 tries to push down or pull up the latch 6, the cam 8 rotates and the slide plate 4 moves up and down unless the motor 9 is operated. Absent.
[0020]
Further, since both end portions of the cam hole 29 are substantially orthogonal to the guide hole 11 in this way, the slide protrusion 17 has an upper limit position (a position where the striker 1 collides with the latch 6) and a lower limit position (an extreme position of the pull-in). In the vicinity of), even if the cam 8 rotates, it does not move up and down greatly, and the load applied to the motor 9 is small.
On the other hand, when the slide protrusion 17 is engaged with the intermediate portion of the cam hole 29 and the slide plate 4 is in the middle of the vertical movement, a large load is applied to the motor 9 and the movement amount of the slide plate 4 with respect to the rotation amount of the cam 8. Will grow.
[0021]
Further, on the back surface of the base plate 3, as shown in FIG. 2, the cam 8 rotates to the leftmost (hereinafter referred to as bottom dead center), and the slide protrusion 17 is connected to one end of the cam hole 29 (third shaft). A second switch 32 for detecting the position of the cam 8 and stopping the motor 9 when it is engaged with the lower end of the guide hole 11 is provided, as shown in FIG. Then, the cam 8 rotates to the rightmost (hereinafter referred to as top dead center), and the slide protrusion 17 is positioned at the other end of the cam hole 29 (the end far from the third shaft 28). A third switch 33 is provided that detects the position of the cam 8 and stops the motor 9 when engaged with the upper end of the motor 11.
[0022]
Next, the operation sequence of the hood fixing device A will be described.
In a state where the hood a is not fixed to the vehicle body b side, as shown in FIG. 1, the cam 8 is located at the top dead center, the slide protrusion 17 is engaged with the other end of the cam hole 29, and the slide plate 4 Is in the upper limit position.
At this time, the latch 6 and the detent lever 7 provided on the slide plate 4 are also raised. Although not shown, the latch 6 is in an open state, and the engagement protrusion 25 of the detent lever 7 is on the arc-shaped peripheral surface of the latch 6. It is in contact.
[0023]
When the hood a is closed, the striker 1 enters the striker entrance 20 of the cover plate 5 and collides with the contact surface 24 of the latch 6. Then, the latch 6 is rotated by the impact, and the striker 1 engaged with the notch 23 of the latch 6 is pulled about 5 to 7 mm as shown in FIG.
Further, as the latch 6 rotates, the engaging protrusion 25 of the detent lever 7 relatively moves along the outer periphery of the latch 6, and when the latch 6 reaches the closed position, the engaging protrusion 25 contacts the contact surface 24. Engage and regulate the reverse rotation of the latch 6. Then, the first switch 27 detects that the detent lever 7 has reached this rotation restricting position, the motor 9 is activated, and the cam 8 starts to rotate counterclockwise.
[0024]
When the cam 8 rotates counterclockwise, the slide protrusion 17 engaged with the cam hole 29 gradually approaches the third shaft 28 and descends along the guide hole 11. As a result, the slide plate 4 and the latch 6 and the detent lever 7 interlocked therewith are lowered, and the striker 1 engaged with the latch 6 is drawn toward the vehicle body b.
When the slide plate 4 and the slide projection 17 are close to the upper limit position, the force that the hood a tries to pull up the latch 6 is small, and the pull-in amount of the slide projection 17 with respect to the rotation amount of the cam 8 is small, so The load is small.
[0025]
When the slide plate 4 and the slide protrusion 17 approach the lower limit position (the limit position for pulling in), the pulling force by the hood a gradually increases and the force to reverse the cam 8 also increases.
On the other hand, when the slide protrusion 17 approaches the lower limit position, the intersecting angle between the cam hole 29 of the cam 8 that rotates to approach the bottom dead center and the guide hole 11 gradually approaches a right angle. The amount of retraction 17 becomes gradually smaller, and the cam 8 can be rotated with a small force.
Therefore, the load on the motor 9 that increases due to the force to reverse the cam 8 can be offset, and the cam 8 can be efficiently rotated.
[0026]
As shown in FIG. 2, when the cam 8 reaches bottom dead center, the second switch 32 detects this, and the motor 9 stops. As shown in FIG. 4, the slide plate 4 and the latch 6 are at the lower limit. Stop at position. At this time, the striker 1 engaged with the latch 6 is further pulled by about 40 mm than when the latch 6 is at the upper limit position.
Further, in this state, since the slide protrusion 17 is engaged with the straight portion of the cam hole 29 orthogonal to the guide hole 11, even if a force for pulling up the latch 6 via the striker 1 works, The plate 4 will not rise.
[0027]
When the detent lever 7 is turned to release the engagement between the engagement protrusion 25 and the contact surface 24, the latch 6 biased by the first spring returns to the open position, and the striker 1 is notched 23. The base end of the hood a is separated from the lid c.
At the same time, the first switch 27 is actuated to reverse the motor 9 and the cam 8 rotates clockwise. As a result, the slide protrusion 17 engaged with the cam hole 29 gradually moves away from the third shaft 28. Ascend along the guide hole 11.
Along with this, the slide plate 4, the latch 6 and the detent lever 7 are raised.
[0028]
When the cam 8 reaches top dead center, the third switch 33 detects this and the motor 9 stops. At this time, the slide plate 4 is returned to the upper limit position, and the latch 6 is also returned to the position where the upper limit striker 1 is received while being rotated to the open position.
The shape of the latch and detent lever, the structure and mounting position of each spring are not limited to those shown in the drawing.
[0029]
【The invention's effect】
According to the present invention, when the striker engages with the latch, the latch rotates and pulls in the striker, and the latch itself slides on the opposite side of the hood to pull in the striker further. It can be fixed in the state.
Also, when the slide protrusion approaches the extreme position, the load on the motor increases due to the force of the hood trying to pull up the latch, but the amount of the slide protrusion is gradually reduced, and the cam can be rotated with a small force. As a result, an increase in load applied to the motor can be suppressed.
[Brief description of the drawings]
FIG. 1 is a rear view of a hood fixing device according to an embodiment of the present invention in a normal state.
FIG. 2 is a rear view of the hood fixing device showing the embodiment of the present invention when the striker is retracted.
FIG. 3 is a front view in a normal state of a hood fixing device showing an embodiment of the present invention.
FIG. 4 is a front view of the hood fixing device showing the embodiment of the present invention when the striker is retracted.
FIG. 5 is a main part rear view showing a relationship between a motor and a cam.
FIG. 6 is a cross-sectional view of main parts of a base plate and a slide plate.
FIG. 7 is a schematic view showing a hood storage procedure.
[Explanation of symbols]
A Cover fixing device a Cover b Body c Cover 1 Striker 2 Body mechanism 3 Base plate 4 Slide plate 5 Cover plate 6 Latch 7 Detent lever 8 Cam 9 Motor 10 Long hole 11 Guide hole 12 Flange 13 Shaft 14 Head 15 Slider 16 Washer 17 Slide projection 18 First spring 19 Second spring 20 Strike advance 21 First shaft 22 Second shaft 23 Notch 24 Contact surface 25 Engaging projection 26 Third spring 27 First switch 28 Third shaft 29 cam hole 30 geared cable 31 fourth spring 32 second switch 33 third switch

Claims (2)

A striker fixed to the hood, a base plate fixed to the vehicle body side, a slide plate attached to the base plate so as to be slidable along the direction of contact of the striker, and rotatable to the slide plate Provided with a latch that engages and disengages with the striker as it rotates, a cam that is rotatably attached to the base plate, and a motor that rotates the cam, and a slide protrusion on the slide plate. The cam is engaged with the slide protrusion, and a cam hole is formed to slide the slide protrusion in the contact / separation direction of the striker as the cam rotates. The striker is engaged with the latch. When the motors are engaged, the cam is rotated in a direction in which the slide protrusion is pulled in the direction opposite to the hood, and the shape of the cam hole is changed to the slide protrusion. When approaching the extreme position of the pull-top fixing apparatus shaped to pull-in amount is reduced gradually. A guide hole is formed in the base plate along the contact / separation direction of the striker, and the slide protrusion is slidably engaged with the guide hole. The hood fixing device according to claim 1, wherein the shape of the portion that engages with the guide hole is such that the crossing angle with the guide hole gradually approaches a right angle as the cam rotates.

Images