JP5536347B2 - Food lock device - Google Patents

Description

  The present invention relates to a hood lock device.

  In general, in an automobile 1 as shown in FIG. 7, the engine room 2 is covered with a hood 3 that can be freely opened and closed, and the hood 3 is normally operated by a hood lock device 4 (see FIGS. 8 and 9). It is locked in the closed state, and unlocked when the engine room 2 is inspected.

  As shown in FIGS. 8 and 9, the hood lock device 4 is locked to a base bracket 6 fixedly disposed on the radiator grill 5 in the engine room 2 so as to lock the hood 3 in a closed state (FIG. 8). By disposing the lock mechanism 7 so as to be rotatable between the lock release position (see FIG. 8B) and turning the lock mechanism 7 to the lock release position. When the open end of the hood 3 is lifted slightly upward, the hook portion 8a that engages with the engaging portion 3a of the hood 3 to prevent the hood 3 from being opened, and the hook portion 8a is rotated to engage the hood 3 The auxiliary lever 8 having a lever portion 8b that can be detached from the joint portion 3a is provided.

  The base bracket 6 has a guide groove 6a into which a striker 3b projecting from the front surface of the inner surface of the hood 3 is inserted. Pins 9 and 10 are provided on the rear surface side of the base bracket 6 at both sides of the guide groove 6a. A lock member 7a and a stopper lever 7b are attached so as to be rotatable about a center 10, and the lock mechanism 7 is constituted by the lock member 7a and the stopper lever 7b.

  The locking member 7a constituting the locking mechanism 7 includes a locking groove 7c for locking the striker 3b inserted into the guide groove 6a of the base bracket 6 when the hood 3 is closed, and the locking groove 7c is formed with an engaging convex piece 7e that engages with a notch 7d formed in the stopper lever 7b in a state where the striker 3b is locked, and the lock member 7a is The striker 3b is urged in a direction for releasing the striker 3b (a direction rotating counterclockwise around the pin 9 in FIG. 8), and the stopper lever 7b is urged by the tension spring 12 to urge the tension spring 11 Against the striker 3b and is biased in a direction in which the lock member 7a is held (in FIG. 8, the direction in which the lock member 7a rotates clockwise around the pin 10), and the stopper lever 7b. In Releasing wire 13 leading to the cab of the hood lock release lever (not shown) is connected.

  The auxiliary lever 8 is formed so that the hook portion 8a and the lever portion 8b are substantially V-shaped, and the V-shaped root portion is rotatable on the front side of the base bracket 6 around the pin 14. The hook portion 8a is attached by the coil spring 15 and held at a position (the position shown in FIG. 8 (a)) where the hook portion 8a restricts the upward movement of the engaging portion 3a of the hood 3 and can prevent the hood 3 from being opened. It is energized to be.

  In the hood lock device 4 as described above, when the hood 3 is closed, the striker 3b is locked in the locking groove 7c in the lock member 7a of the lock mechanism 7 as shown in FIG. At this time, the lock member 7a is urged by the tension spring 11 in a direction to release the striker 3b (a direction rotating counterclockwise around the pin 9 in FIG. 8). The engaging convex piece 7e of the member 7a engages with the notch 7d of the stopper lever 7b, and the stopper lever 7b engages the striker 3b against the urging force of the tension spring 11 by the tension spring 12. In this state, the striker 3b is held in a locked state because the biasing member 7a is urged in a direction in which the lock member 7a is held (a direction in which the lock member 7a rotates clockwise in FIG. 8). Open Never would.

  On the other hand, when the hood lock release lever (not shown) in the cab is pulled during inspection of the engine room 2, the release wire 13 is pulled rightward in FIG. 8 is rotated against the urging force of 12 and the engaging convex piece 7e engaged with the notch 7d of the stopper lever 7b is released, and the lock member 7a is pulled. The striker 3b, which is rotated around the pin 9 by the biasing force of the spring 11 and held in the locked state, is repelled, and the open end of the hood 3 is slightly upward as shown by the phantom line in FIG. It will be a form that floats up.

  At this time, since the engaging portion 3a of the hood 3 engages with the hook portion 8a of the auxiliary lever 8, the hood 3 cannot be opened. However, as shown by a virtual line in FIG. When a finger is inserted through a gap formed by the open end of the lever slightly floating upward, and the lever portion 8b of the auxiliary lever 8 is lifted and rotated about the pin 14, the hook portion of the auxiliary lever 8 is 8a can be disengaged from the engaging portion 3a of the hood 3 and the hood 3 can be opened.

  In this way, in addition to the lock mechanism 7, the auxiliary lever 8 is further provided to double the lock. In the unlikely event, the driver accidentally removes the hood lock release lever (not shown) in the driver's cab while driving. ), Even if the holding state of the striker 3b by the lock mechanism 7 is released, the engaging portion 3a of the hood 3 is caught by the hook portion 8a of the auxiliary lever 8, and the hood 3 is released. This is to prevent the front view from being obstructed.

  For example, Patent Document 1 shows a general technical level related to the food lock device as described above.

JP 2000-104430 A

  By the way, although the number of fatalities due to traffic accidents has been decreasing in recent years, pedestrian accidents have a high rate of death or serious injury. However, in order to reduce the number of deaths due to traffic accidents, the Ministry of Land, Infrastructure, Transport and Tourism has introduced a pedestrian head protection standard that defines the impact mitigation performance of the hood 3 for passenger cars and some freight cars.

  According to the pedestrian head protection standard, the front part of the automobile 1 including the hood 3 and the windshield 16 (see FIG. 7) is divided into 15 areas, and a spherical impactor imitating a human head for each area. (2 types of adults and children) are made to collide with each other at a tilt angle of 20 ° and a tilt angle of 60 ° downward from the front in the horizontal direction, and the impact received by the impactor is measured. The Ministry of Land, Infrastructure, Transport and Tourism and the Japan Automobile Accident Countermeasures Organization conducted a pedestrian head protection performance test in the Japanese New Car Assessment Program (J-NCAP). The evaluation results are published.

  However, in the case of a structure in which the auxiliary lever 8 is provided integrally as in the conventional hood lock device 4 as described above, the auxiliary lever 8 is inhibited from mitigating the impact received by the impactor. There was room for improvement.

  Incidentally, in the conventional hood lock device 4, the auxiliary lever 8 is provided on the hood 3 side as a separate body. In this case, when the impactor collides with the hood 3, Since the auxiliary lever 8 is also deformed, it is advantageous in mitigating the impact received by the impactor, but has the disadvantage that the design restrictions and components increase and the cost increases.

  In view of such circumstances, the present invention can improve the impact mitigation performance of the hood and avoid pedestrian head protection while avoiding cost increase and ensuring rigidity and operability during operation of the auxiliary lever. A food lock device is to be provided.

The present invention relates to a base bracket fixedly disposed at a position close to an upper portion of a radiator grill in an engine room in an automobile,
A lock mechanism disposed on the base bracket so as to be rotatable between a lock position for locking the hood covering the engine room in a closed state and an unlock position;
A hook portion that engages with the engagement portion of the hood to prevent the hood from being released when the open end of the hood is lifted upward by a required amount by rotating the lock mechanism to the unlock position, and the hook portion In the hood lock device provided with an auxiliary lever having a lever portion for rotating the lever to disengage from the engaging portion of the hood,
The lever part of the auxiliary lever has a projecting part that projects forward from a plane including the hook part, and an operation part that extends at an upward inclination angle θ with respect to the horizontal direction, and the inclination angle θ is
20 ° <θ <60 °
And,
The present invention relates to a hood lock device characterized in that a notch is formed between the overhang portion and the operation portion .

  According to the above means, the following operation can be obtained.

  A spherical impactor simulating a human head is caused to collide with the front part of the automobile downward from the front in a horizontal direction at a tilt angle of 20 ° and a tilt angle of 60 °. When the angle is set to 20 ° and 60 °, the force by the impactor is input as an axial force to the operating portion, and the impact of the impactor is increased because the operating portion is not easily deformed. If the tilt angle θ is set to 20 ° or less, it becomes difficult to secure a space for putting a finger under the operation portion. On the other hand, if the tilt angle θ is set to 60 ° or more, it is difficult to put a finger on the operation portion. There is a risk that the operability will be worsened. However, in the present invention, since the inclination angle θ is 20 ° <θ <60 °, the impact received by the impactor is reduced, and the operability is improved.

At any inclination angle, the lever part of the auxiliary lever is deformed at the base part of the overhanging part, and the impact received by the impactor is mitigated, so the pedestrian head in the event of a collision between the actual car and the pedestrian Protection is possible. Further, in the hood lock device, since a notch is formed between the overhanging portion and the operation portion, it is possible to concentrate stress on the notch forming portion to facilitate deformation, and the impactor receives It is more effective in further mitigating the impact and protecting the pedestrian head at the time of collision between the actual car and the pedestrian.

  On the other hand, unlike a hood lock device provided on the hood with the auxiliary lever as a separate body, the number of components is not increased, and an increase in cost can be avoided.

  In the hood lock device, an upright portion can be formed between the overhang portion and the operation portion, and in this way, the lever portion of the auxiliary lever can be formed between the overhang portion or the operation portion and the upright portion. It is possible to deform at the bent part.

  According to the hood lock device of the present invention, the impact mitigation performance of the hood can be improved and the pedestrian head can be protected while avoiding cost increase and the like and ensuring the rigidity and operability when operating the auxiliary lever. An excellent effect can be achieved.

It is a front side perspective view which shows the hood lock apparatus in the Example of this invention. It is a back side perspective view which shows the auxiliary lever single item in the Example of this invention, Comprising: It is the II equivalent arrow line view of FIG. It is an enlarged view which shows the principal part of the auxiliary lever in the Example of this invention, Comprising: It is a III equivalent arrow line view of FIG. It is side sectional drawing which shows the hood lock apparatus in the Example of this invention. It is a sectional side view showing the hood lock device in the embodiment of the present invention, and shows the deformed state of the auxiliary lever when the impactor is caused to collide downward from the front with respect to the horizontal direction at an inclination angle of γ = 20 °. FIG. It is a sectional side view which shows the hood lock apparatus in the Example of this invention, Comprising: The deformation | transformation state of the auxiliary lever at the time of making an impactor collide downward with respect to a horizontal direction from the front at the inclination | tilt angle of (gamma) = 60 degrees is shown. FIG. It is a perspective view which shows a common motor vehicle. It is a front view which shows a prior art example, Comprising: (a) is a figure which shows a locked state, (b) is a figure which shows a lock release state. It is a sectional side view which shows a prior art example.

  Embodiments of the present invention will be described below with reference to the accompanying drawings.

1 to 6 show an embodiment of the present invention. In the figure, the same reference numerals as in FIGS. 7 to 9 denote the same components, and the basic configuration is shown in FIGS. As shown in FIGS. 1 to 6, the feature of this embodiment is that the lever portion 8b of the auxiliary lever 8 is stretched forward from the plane including the hook portion 8a. A protruding portion 8c that protrudes, a rising portion 8d that rises upward from the front end of the protruding portion 8c, and an operating portion 8e that extends forward from the upper end of the rising portion 8d at an upward inclination angle θ with respect to the horizontal direction. , The inclination angle θ,
20 ° <θ <60 °
It is in the point.

  In the case of the present embodiment, as shown in FIG. 4, the overhang angle α formed by the plane including the hook portion 8a and the overhang portion 8c is 90 °, and the curvature radius R1 on the curved inner surface side is 6 [mm]. The rising angle β between the protruding portion 8c and the raised portion 8d is 90 °, the radius of curvature R2 on the curved inner surface side is 6 mm or less, and the open end of the hood 3 is Considering the operability when inserting a finger through a gap generated by slightly floating upward, the inclination angle θ is set to 30 °. The rising angle β can be set in the range of 90 ° to 120 °.

  On the other hand, the width W1 (see FIG. 3) of the overhanging portion 8c is 15 to 18 [mm], and the front end portion of the overhanging portion 8c connected to the curved portion with the curvature radius R2 is located at both width end positions. A V-shaped notch 17 is formed, the notch depth d of the notch 17 is set to 15% or less of the width W1, and the width W2 of the overhanging portion 8c reduced by that amount is 70 [% of the width W1. %] Or more, the ratio of the cross-sectional area of the portion where the notch 17 is formed to the cross-sectional area of the general portion of the overhanging portion 8c is adjusted, whereby the auxiliary lever 8 can be operated. The balance between securing the rigidity at the time and the ease of deformation at the time of the collision of the pedestrian or the impactor 18 (see FIGS. 5 and 6) with respect to the automobile 1 is balanced.

  Next, the operation of the illustrated example will be described.

  With the configuration as described above, when the normal auxiliary lever 8 is operated when the hood 3 is opened, as shown by the phantom line in FIG. 4, the finger is lifted from the gap generated by slightly lifting the open end of the hood 3. Even if the operation portion 8e of the lever portion 8b of the auxiliary lever 8 is lifted, the lever portion 8b of the auxiliary lever 8 is not plastically deformed, and its rigidity is ensured, which may hinder the operation. There is no.

  If the tilt angle θ is set to 20 ° or less, it is difficult to secure a space for putting a finger under the operation portion. On the other hand, if the tilt angle θ is set to 60 ° or more, the operation portion is hung. Although it is difficult to slip and the operability may be deteriorated, the operability is improved because the inclination angle θ is set to 30 ° of 20 ° <θ <60 ° in this embodiment.

  On the other hand, when a spherical impactor 18 simulating a human head is caused to collide with the front of the automobile 1 at a tilt angle of γ = 20 ° downward from the front in the horizontal direction, the phantom line in FIG. As shown, the lever portion 8b of the auxiliary lever 8 is deformed so as to bend backward at the connecting portion between the overhanging portion 8c and the upright portion 8d, and is bent so as to be bent downward at the base portion of the overhanging portion 8c. Since the impact received by the impactor 18 is alleviated, it is possible to protect the pedestrian head at the time of an actual collision between the automobile 1 and the pedestrian. Incidentally, in this case, the inclination angle θ is not limited to 30 °, and even if it is set in the range of 20 ° <θ <30 ° or 30 ° <θ <60 °, it is the same as shown by the phantom line in FIG. In addition, the lever portion 8b of the auxiliary lever 8 can be deformed.

  When a spherical impactor 18 simulating a human head is caused to collide with the front of the automobile 1 downwardly with respect to the horizontal direction from the front at an inclination angle of γ = 60 °, as indicated by an imaginary line in FIG. The lever portion 8b of the auxiliary lever 8 is deformed so as to fall forward at the connecting portion between the overhanging portion 8c and the upright portion 8d, and is deformed so as to be bent downward at the root portion of the overhanging portion 8c. Since the impact received by 18 is mitigated, the pedestrian head can be protected during a collision between the actual automobile 1 and the pedestrian. Incidentally, in this case, the inclination angle θ is not limited to 30 °, and even if it is set in the range of 20 ° <θ <30 ° or 30 ° <θ <60 °, it is the same as shown by the phantom line in FIG. In addition, the lever portion 8b of the auxiliary lever 8 can be deformed.

  5 and 6, since the notch 17 is formed in the front end portion of the overhang portion 8c, stress is concentrated on the connecting portion between the overhang portion 8c and the upright portion 8d. It is possible to make the deformation easier, and it is more effective in securely reducing the impact received by the impactor 18 and protecting the pedestrian head at the time of collision between the actual vehicle 1 and the pedestrian. It has become.

  On the other hand, unlike the hood lock device provided on the side of the hood 3 with the auxiliary lever 8 as a separate body, the number of components is not increased and an increase in cost can be avoided.

  In this way, it is possible to improve the impact mitigating performance of the hood 3 while protecting the pedestrian head while avoiding cost increase and ensuring the rigidity and operability when operating the auxiliary lever 8.

  Note that the hood lock device of the present invention is not limited to the above-described embodiments, and it is needless to say that various modifications can be made without departing from the scope of the present invention.

  The hood lock device of the present invention is effective in manufacturing an automobile that satisfies the pedestrian head protection standard that defines the impact mitigation performance of the hood.

DESCRIPTION OF SYMBOLS 1 Car 2 Engine room 3 Hood 3a Engagement part 4 Hood lock device 5 Radiator grille 6 Base bracket 7 Lock mechanism 8 Extra lever 8a Hook part 8b Lever part 8c Overhang part 8d Upright part 8e Operation part 17 Notch 18 Impactor θ Inclination angle

Claims (2)

A base bracket fixedly disposed at a position close to an upper portion of a radiator grill in an engine room in an automobile;
A lock mechanism disposed on the base bracket so as to be rotatable between a lock position for locking the hood covering the engine room in a closed state and an unlock position;
A hook portion that engages with the engagement portion of the hood to prevent the hood from being released when the open end of the hood is lifted upward by a required amount by rotating the lock mechanism to the unlock position, and the hook portion In the hood lock device provided with an auxiliary lever having a lever portion for rotating the lever to disengage from the engaging portion of the hood,
The lever part of the auxiliary lever has a projecting part that projects forward from a plane including the hook part, and an operation part that extends at an upward inclination angle θ with respect to the horizontal direction, and the inclination angle θ is
20 ° <θ <60 °
And,
A hood lock device , wherein a notch is formed between the overhanging portion and the operation portion .   The hood lock device according to claim 1, wherein an upright portion is formed between the overhang portion and the operation portion.

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