JPH045661Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The invention is a locking device for a pivotable hood, for example for the bonnet of a motor vehicle or for a truck, which locks during a pivoting movement of the hood within the locking area. The main lock is a turn latch with a locking pin guided in a slot in the casing, and the secondary lock is a securing member mounted on the lock casing so that it can rotate between two limit positions against the force of a spring. a lock, the securing member is arranged at the upper edge of the lock casing in a first limit position in which the locking pin is held within the lock range by the securing member under the action of a spring in the unlocked state of the main lock. The hook has a large protruding hook part, the upper edge of which serves as a first movable slideway for the locking pin, and the lower edge serving as a fixed stop for the locking pin. Concerning the type of thing that is.

Prior Art A locking device having a main lock and a slave lock can cause an accident, for example, in the case of the hood of a passenger car, when the hood, which is supposed to be closed, suddenly flips up while the vehicle is in motion, blocking the driver's view of the road ahead. This is necessary to prevent at least the hood suspension mechanism from being damaged by headwinds generated based on the vehicle's traveling speed even if an accident is avoided. Generally, the lock, which is the main component of the locking device, is attached to an end panel fixed to the front of the vehicle, and the lock pin is disposed toward the movable hood. When opening a tightly locked hood via a body wire operated from the passenger compartment, the main lock is removed and the hood is rotated by a spring mechanism inside the lock until it collides with a stopper inside the slave lock. , when this stopper is released,
The hood can be fully opened. When closing the hood, the slave lock is already activated by the hood's own weight. That is, at this time, the locking pin abuts against the inclined upper edge of the hook-shaped securing member forming the follower lock, thereby causing this securing member to pivot away laterally against the force of the spring. The stop face then acts on the locking pin from above, so that this locking pin is now locked against movement in the opening direction. If the hood is then lowered further, for example by a manual push or by a corresponding thrust during lowering, the main lock is activated.

Locking devices of the type mentioned at the outset are known and are used, for example, in Daihatsu's passenger cars. In this case, as mentioned above, in its first limit position (opening position) the securing element projects with its hook part significantly beyond the upper edge of the lock casing. The advantage of this construction is that in the unlocked but still secured state the hood can be raised sufficiently to allow a person to manually operate the secure release lever between the front edge of the hood and the end panel. It is sufficiently reachable through the gap between Therefore, during the lowering of the hood, the locking pin rests on the first possible slide path, and during the course of the subsequent lowering movement of the pin, the securing element is given a pivoting movement against the spring force, so that A hook member opens the entrance opening of the slit in the lock casing. The securing element then pivots back into its starting position while the locking pin engages in the swivel latch, and in this starting position the underside of the hook part is moved out of its current position, for example after the main lock has been unlocked. It acts as a stopper for the lock pin when it makes an upward movement.

Problem to be Solved by the Invention The problem with the above-mentioned known locking device is that the securing member maintains a predetermined starting position, that is, the first limit position even when the hood is tightly closed, that is, the swivel latch is locked. However, as mentioned above, in this position the hook part protrudes significantly from the upper edge of the lock casing, which makes it necessary, at least in this region, for the hood in the closed position to be formed correspondingly higher than the side panel. . This is contrary to current body shaping concepts, which require a hood leading edge as low as possible for hydrodynamic reasons.

The present invention therefore aims to eliminate this problem by improving the locking device of the type mentioned at the outset, so that in an unlocked but still secured hood, the hood is sufficiently secured and unsecured as before. liftable and at the same time in the closed position of the hood the securing element is located sufficiently far from the first limit position so that the hook part does not or only slightly protrudes from the upper edge of the casing; The challenge is to do so.

Means for Solving the Problems According to the invention, the securing member has a second movable slideway which exerts a mutual movement with the locking pin, which slideway is at the very end of the locking process. a position in which the securing member abuts the locking pin under the action of a spring and forms a closed state in the direction of a predetermined second limit position while the locking pin travels in the slot to a predetermined locking position; The solution is that in the closed state the hook member does not project at all or only slightly above the upper edge of the lock casing.

Embodiment The embodiment described in claim 2 of the utility model registration must take into account the occurrence of a situation in which the securing member cannot be turned back from the closed position to the first limit position due to breakage of the spring or other reasons. It is advantageous to use it when necessary. By using the securing member provided with the third and fourth movable slideways as described in item 2, even if the spring is damaged, for example, the securing member can be sufficiently forcibly guided. In this case 2
One of the two further movable slides, namely the third slide, extends approximately equidistantly from the second slide, and after unlocking the main lock, the securing member is secured by the locking pin. The locking pin is forced to run to a first limit position in which the securing function is taken over by the hook part. One more
The four fourth slides allow the locking pin to run into the slit during the closing movement of the hood, even if the entry opening of the slit is blocked by the fourth slide itself, for example due to a breakage of the spring. It is formed so that it can be used. The locking pin is pressed onto the fourth slideway during its movement in the closing direction, so that this fourth
The slideway itself rotates to open the entry opening of the slit.

Operation When the locking pin moves in a predetermined locking direction by pressing down the hood, it reaches the second movable slideway 12 via the slideway that is the upper edge 9 of the hook part 8, and the securing member is Rotate until the hook part opens the movement path of the lock pin. When opening, the main lock is unlocked and the locking pin is moved in the direction of the slit exit by the previously tightened latch, and the securing member is moved to the first limit position by the force of the spring. It is rotated, and then by the hook part,
The locking pin is prevented from running out of the slit, ensuring that the hood does not open any further automatically. Opening of the hood is thus only possible by manually releasing the locking function, as is well known in the art.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The drawing shows only those parts of a locking device for a pivotable hood of a motor vehicle which are relevant to the invention. In other words, a lock pin fixed to the hood, a lock casing disposed on the body end panel, a securing member rotatably fixed to the lock casing, and a spring for holding the securing member in a normal position are shown. has been done.

The securing element, designated as a whole by the reference numeral 1, consists of a flat iron which is pivotably attached to the lock casing 3 about an axis 2 and is designed as an angle lever. This securing member 1 is the lock casing 3
The normal position shown in FIG.
That is, the hood is in the open position. At the free end of the left-hand arm 7 of the angle lever, a hook part 8 is arranged, which in its normal position has an inclined upper edge 9 and a horizontal lower edge 10. An operating grip 11 is arranged on the left edge of the arm 7 and projects perpendicularly from the plane of the drawing, by means of which the grip can be manually released. The right edge of the arm 7 is formed as a slide path 12 for a locking pin 13 fixed to the hood, which, as can be seen in the subsequent figures, follows a movement path 14, indicated by dash-dotted lines, during the closing movement of the hood. The locking pin 13, which moves vertically downward along the slideway 12, imparts a counterclockwise rotation to the securing member 1 after reaching the slideway 12. At this time, the spring 6 causes the locking pin 13 to rotate vertically downward. Contact is maintained.

The right arm 15 of the angle lever has two slideways 16, 17, one of which in the example of the drawing extends approximately equidistantly from said slideway 12 and abruptly It has now transitioned to the other slideway 17. The functions of the slideways 16 and 17 will be further described later using FIGS. 6 to 8.

A lock casing 3 is located behind the securing member 1, and a main lock (not shown) is accommodated within this lock casing 3. The housing wall 18 adjacent to the securing element 1 has an upwardly opening slit 19 with a flap-shaped entry 20 which extends along the movement path 14 and serves as a guide for the locking pin 13.

In FIG. 1, the hood has been lowered to the point where the lock pin 13 abuts the upper edge 9 of the hook part 8.
When the hood is lowered further, the hook part 8 is pushed to the left by the locking pin 13, which cannot be moved to the side in practice, and the spring 6 is further tensioned. This results in the position shown in FIG. Subsequently (see FIG. 3) the securing element 1 springs back into its normal position under the action of the spring 6, with the locking pin 13 reaching the slideway 12 and, depending on the shape of this slide, the following hood. Securing member 1 during closing movement
is pivoted through the position shown in FIG. 4 to the closed position of FIG. In this position, the upper edge 9 of the hook part 8 is below the upper edge 21 of the lock casing 3. In this closed position, the locking pin 13 is held by a swivel latch (not shown) of the main lock, which is located in the locked position. Only when this swivel latch, which is tensioned by its own spring, is released can the spring 6 be activated again and the securing member 1 be swiveled back into its predetermined normal position. At this time, the lock pin 13 is forced to move upward. However, this locking pin 13 cannot run out of the slot 19 since the lower edge 10 of the hook part 8 acts as a stop and prevents further opening of the hood. This stopper action is released by rotating the securing member 1 by means of the operating grip 11.

Next, a case will be described in which the slideways 16 and 17 formed in the right lever arm 15 function.

The locking pin 13 is in the locking position (Fig. 5),
Subsequently, you will be freed from the levy. However, it is assumed that the spring 6 is inactive, for example due to its breakage, and the securing element 1 therefore remains in the closed position. In this case the hood is
If the lever arm 15 were not provided, the lower edge 10 would not function as a stopper, and the vehicle would easily spring up, for example, while the vehicle is running.
In order to prevent the occurrence of such a dangerous situation, a lever arm 15 is provided according to the invention. This lever arm 15, with its slideway 16,
When the lock pin 13 moves upward along the movement path 14, the securing member 1 is forcibly rotated to a predetermined normal position, and during this upward movement, the lower edge 10 of the hook portion 8
acts to again perform the predetermined stopper function at an appropriate time. Furthermore, in order that the lever arm 15 does not interfere with the closing movement of the hood (in the closed position of the securing element 1, the lever arm 15 projects into the movement path 14 of the lock pin 12),
The upper edge of the lever arm 15 is also designed as a slideway 17.

The course of movement of the securing element 1 and the locking pin 13 in the above-mentioned case, i.e., for example in the case of a closing movement of the hood under a broken spring condition, is shown in FIGS. 6 to 8.

In FIG. 6 the securing member 1 remains in the closed position due to a failure or non-functionality of the spring 6. The hood is lowered until the locking pin 13 contacts the slideway 17 of the right lever arm 15 located in front of the flap-shaped entryway 20. In order to reduce the surface pressure, this slideway 17 is made wider than the thickness of the lever arm 15 by forming the appropriate lever arm area as a web 22 perpendicular to the drawing plane. The curvature of the slideway 17 causes the lever arm 15 and thus the securing member 1 to pivot further to the right through the position shown in FIG. , the slit 19 is opened immediately after the movement phase shown in FIG.
It is designed to allow selection. In this case, the securing element 1 is again rotated counterclockwise in the second slideway 12.

Effects of the invention According to the invention, each of the above-mentioned problems is fully solved, the secured state of the hood after unlocking is reliably guaranteed, and the securing action can be smoothly released. Furthermore, since the securing member sinks sufficiently into the casing in the hood closed position, it is advantageous for molding the hood.

[Brief explanation of the drawing]

The drawings show a locking device according to an embodiment of the present invention, and include FIGS. 1, 2, 3, and 4.
5 shows the locking pin and securing member at each successive stage of the movement path during normal hood closing movement, and FIGS. 3 shows the locking pin and the securing element at different stages of their movement in the special case where the securing element is not in its normal position at the beginning of its closing stroke; FIG. 1...Securing member, 2...Shaft, 3...Lock casing, 4, 5...Places, 6...Spring, 7, 15...
Arm, 8... Hook portion, 9, 21... Upper edge, 1
0...lower edge, 11...operation grip, 12,1
6, 17...Slideway, 13...Lock pin, 14
...Movement path, 18...Casing wall, 19...Slit, 20...Rump-like running entrance, 22...Web.

Claims (1)

[Claims for Utility Model Registration] 1. A locking device for a pivotable hood, comprising a locking pin that is guided in a slit in the lock casing during a pivoting movement of the hood within the lock area. It has a main lock, and a secondary lock as a securing member, which is attached to the lock casing so as to be rotatable between two limit positions against the force of a spring. has a hook portion which projects significantly above the upper edge of the lock casing in a first limit position in which the lock pin is held within the lock region by the securing member under the action of a spring in the locked state; In the version in which the upper edge of this hook part serves as a first movable slide for the locking pin and the lower edge as a fixed stop for the locking pin, the securing member 1 is interlocked with the locking pin 13. It has a second movable slide 12 which exerts a movement on the locking pin 13, which during the locking process under the action of the spring 6 abuts the locking pin 13 and which moves in the slot 19. While traveling to a predetermined locking position, the securing member 1 is curved in order to rotate in the direction to a predetermined second limit position to a position where the closed state should be established, and in this closed state, the hook member Locking device for a pivotable hood, characterized in that 8 does not project at all or only slightly above the upper edge 21 of the lock casing. 2. The securing member 1 has third and fourth movable slideways 16, 17 which exert mutual movement with the locking pin 13.
In the closed position of the securing member 1, each slideway 16, 17 projects into the movement path 14 of the locking pin 13 in the slit 19 of the casing 3, and the locking pin 13 in the slit 19 According to claim 1, the locking pin 13 is suitably configured to rotate the securing member 1 into the first limit position or into the closed position depending on the direction of movement during the movement of the locking pin 13. locking device.