JP3472410B2 - Collision detection sensor mounting structure for cab-over vehicles - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a collision detection sensor mounting structure for a so-called cab-over type truck (hereinafter referred to as a "cab-over truck"). 2. Description of the Related Art In recent years, airbag systems have been introduced into passenger cars to ensure the safety of occupants in the event of a collision.
The airbag system detects the impact (deceleration) at the time of collision with a collision detection sensor attached to the vehicle body, determines whether the airbag should be deployed by the control unit, and sends an electric signal to the steering wheel if necessary. Is sent to an inflator attached to the airbag to burn the gas generating agent to inflate the airbag. [0003] The airbag system has to operate reliably once in the lifetime of a vehicle, despite its frequency of being activated once or not, and conversely, it should be activated. In such a case, it is necessary to prevent the device from operating when the vehicle is not in collision (non-collision or minor collision that does not require deployment of the airbag), so that high reliability of the device is required. [0004] Such an airbag system has been put to practical use in a passenger car using a collision detection sensor as disclosed in, for example, Japanese Utility Model Laid-Open No. 1-167946. 1-16
FIG. 7 shows a collision detection sensor disclosed in Japanese Patent No. 7946. In the drawing, a rear end face 101A of a front side member 101 extending in the vehicle front-rear direction and a dashboard 10 are shown.
A collision detection sensor 104 is fixed to a portion 103 where the two are joined. However, in a cab-over vehicle, it is difficult to put the airbag system into practical use due to the following special features. For example, the rate of change in the weight of the entire vehicle is large between when the load is loaded on the carrier (loading state) and when the load is not loaded on the carrier (empty state). The deceleration is not constant. In the case of a vehicle body of a passenger car, the change in the loading state is small, and such a change in the loading state is negligible for the collision detection sensor. [0006] There are various cases in which the cab-over vehicle is subjected to a forward collision. The opponent of the forward collision is the one with a high bed,
There are low-floor types with low loading platforms and box-type loading platforms (van-type vehicles), which collide at various parts of the cab. The collision mode such as the collision range is not uniform. Under such technical background, in a cab-over vehicle, a collision detection sensor is mounted on a portion near the occupant such as a floor panel in the cab or an aggregate of the floor panel, or a collision detection sensor is mounted on a plurality of portions in the cab. It is conceivable to increase the reliability of the collision detection sensor. FIG. 8 shows an example of a cab-over vehicle when a collision detection sensor is mounted on a floor panel. In the figure, reference numeral 201 denotes a cab-over vehicle. The cab-over vehicle 201 has a frame 202, and a cab 203 is mounted on the frame 202. The frame 202 includes left and right side rails 202A, 202A having a U-shaped cross section,
It comprises a plurality of cross members 202B joined to the side rails 202A, 202A at predetermined intervals. The cab 203 is formed in a box shape, is composed of a large number of panels made of a thin metal plate, and has an integral three-dimensional shell structure as a whole. The cab 203 is mounted on a frame 202, and is pivotally mounted on a front end side of the frame 202 so as to be tiltable. A rear end of the cab 203 is mounted on a mounting bracket 20 provided on the frame 202.
4 is supported. A bumper 205 is mounted on a front end of the frame 202, and a front side 203A of the cab 203 is located slightly behind the bumper 205. A collision detection sensor 207 is mounted on a portion near the occupant such as a floor panel 206 of the cab 203 or an aggregate (not shown) of the floor panel 206. Then, the cab 203 is
Since it is separate from the cab 203, it does not constitute a strength member as a vehicle, and therefore has a weak strength, and the front side 203A of the cab 203 is easily crushed during a collision. [0010] However, in the case of a cab-over vehicle 201, the cab 2 is placed on a frame 202.
No. 03 is mounted, and the frame 202 and the cab 203 are not in a state of being strongly connected. Therefore, the strength member as a vehicle is not formed, and the cab 203 is weak in terms of strength. In the cab-over vehicle 201, the sensing condition of the collision detection sensor 207 differs depending on various conditions such as the vehicle weight, the loading state, the collision mode such as the collision range, and the structure of the cab. Is difficult to sense. In the cab overcar 201, cab 2
03 floor panel 206 or floor panel 206
When the collision detection sensor 207 is attached to a part near the occupant such as aggregate of the cab 203, when the cab over vehicle 201 collides forward due to a rear-end collision or the like, even if the front side 203A of the cab 203 is momentarily collapsed, the cab over vehicle 201 is still The vehicle is not decelerated, the floor panel 206 is not decelerated, the input to the floor panel 206 is reduced, the sensing of the collision detection sensor 207 is slowed, and the sensing is delayed. Also, when one side of the floor panel 206 without the collision detection sensor 207 collides, the detection of the collision detection sensor 207 becomes dull and the detection becomes slow. In short, since the cab 203 is weak in strength,
Only the colliding part of 3 is easily crushed, and the collision state (deceleration)
Is not transmitted to the floor panel 206 or the aggregate of the floor panel 206, the input to the collision detection sensor 207 is small, and the sensing becomes dull and the sensing becomes slow. On the other hand, in the case of a passenger car, a member corresponding to the frame 202 of the cab-over vehicle 201 is shown in FIG.
The front side member 101 shown in FIG. 1 has a strength member integrally formed with the front side member 101. Further, in the event of a frontal collision, the engine hood portion 105 on the front side of the vehicle body is crushed, and the collision state ( (Deceleration) is transmitted to the collision detection sensor 104 via the front side member 101, and the detection of the collision detection sensor 106 is ensured by the time when the occupant protection device needs to operate. In the case of a cab-over vehicle 201, there is a frame 202 as an alternative to a vertical bone member such as a front side member 101 of a vehicle body of a passenger car.
If the collision detection sensor 208 is attached to the
2 is unlikely to collapse up to the collision detection sensor 208,
The detection of the collision detection sensor is ensured, but in this case,
The above-described specific problem that accurate detection in the cab-over vehicle 201 is difficult occurs, and the significance as a collision detection sensor for protecting an occupant in the cab 203 is lost. In short, when the cab-over vehicle 201 collides forward, the detection of the collision detection sensor is not reliable. SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a cabover that can reliably detect a collision detection sensor and speed up detection of a forward collision of various forms of cabover vehicles. An object of the present invention is to provide a structure for mounting a collision detection sensor in a vehicle. Means for Solving the Problems The invention according to claim 1 is:
In a collision detection sensor mounting structure in a cab-over vehicle including a collision detection sensor mounted in a cab mounted on a frame, the cab includes left and right front pillar members,
A plurality of horizontal bone members coupled to the left and right front pillar members and constituting a front side, and a vertical bone member that is connected to the plurality of horizontal bone members by being bridged on the driver's seat side, wherein the horizontal bone member is A front upper reinforce, an instrument member disposed behind the front upper reinforce, and a front cross member disposed below the front upper reinforce, the vertical bone member comprising:
The front side plate portion and the side surface plate portion are configured to have a T-shaped cross section, and are connected and connected across the three horizontal bone members on the driver's seat side, and the collision detection sensor is The vertical bone member is mounted on the side surface side plate portion arranged substantially parallel to the vehicle front-rear direction. (Function) In the invention as set forth in claim 1, in the cab-over vehicle, the cab is mounted on the frame and is separated from the frame in terms of strength. One three-dimensional wide-area surface strength member composed of a member, a lateral bone member, and a front pillar member is configured. When the cab collides forward, the wide area strength member constituting the front side of the cab receives a direct collision, so that the deceleration is transmitted to the collision detection sensor in the wide area strength member. Embodiments of the present invention will be described below with reference to the drawings. Referring to FIGS. 1 to 6, a description will be given of a collision detection sensor mounting structure in a cab-over vehicle according to an embodiment of the present invention. In the figure, reference numeral 1 denotes a cab-over vehicle, and the cab-over vehicle 1 has a frame 2,
The cab 3 is mounted on the frame 2. The frame 2 includes left and right side rails 2A, 2A having a U-shaped cross section, and a plurality of cross members 2B coupled to the side rails 2A, 2A at predetermined intervals. The cab 3 is mounted on the frame 2 and is pivotally mounted on a bracket 2C at the front end of the frame 2 so as to be tiltable. The rear end of the cab 3 is supported by a mounting bracket 4 provided on the frame 2. . Frame 2
A bumper 5 is attached to the front end. The front side 3A of the cab 3 is located slightly behind the bumper 5. The cab 3 includes a floor assembly 7, a front assembly 8, a roof assembly 9, left and right front pillars 10, 10 and left and right rear pillars 11, 1.
1 and the like, and is composed of a number of panels made of a thin metal plate, and as a whole, forms an integral three-dimensional shell structure. The front assembly part 8 includes a first horizontal member 12 including a front upper reinforcement, a second horizontal member 13 including a front cross member, and a first horizontal member 13 including a front cross member.
A third transverse member 14, which is an instrument member disposed behind the transverse member 12, a front lid 15, and a front member 16. The first horizontal bone member 12 is a bone member made of a thin metal plate and having a cross section closed in a box shape. Both ends of the first horizontal bone member 12 are connected to the left and right front column members 10, 10 by spot welding. Here, as the mode of the “coupling”, in addition to spot welding, there are carbon dioxide arc welding, fastening means using bolts, nuts and the like. By such “coupling”, the first horizontal bone member 12 and the front column members 10 are integrally formed to form a rigid structure. The second horizontal bone member 13 is made of a thin metal plate and is a bone member having a substantially C-shaped cross section which opens forward. Both ends of the second horizontal bone member 13 are connected to the left and right front column members 10, 10 by spot welding. Here, as the mode of the “coupling”, in addition to spot welding, there are carbon dioxide arc welding, fastening means using bolts, nuts and the like. By such “coupling”, the second horizontal bone member 13 and the front column members 10 are integrally formed to form a rigid structure. The third horizontal bone member 14 is made of a thin metal plate and has a substantially U-shaped cross section which opens upward. Both ends of the third horizontal bone member 14 are connected to the left and right front pillar members 10, 10 by spot welding. Here, as the mode of the “coupling”, in addition to spot welding, there are carbon dioxide arc welding, fastening means using bolts, nuts and the like. By such “coupling”, the third lateral bone member 14 and the front column members 10 are integrally formed to form a rigid structure. The upper flange portion 12A of the first horizontal bone member 12
, A lower edge of a front window 18 is attached via a weather strip 17. First transverse bone member 1
2 the upper edge 1 of the front member 16 on the lower flange portion 12B.
6A is connected by spot welding. The lower edge 16B of the front member 16 is spot-welded to the second horizontal
Upper flange portion 13A. The bottom 13B of the second horizontal member 13 is connected to the floor panel 7A of the floor assembly 7 by spot welding. The front lid 15 and the front member 16 are connected by spot welding via a bracket 19. Then, the vertical bone member 20 composed of the pedal bracket is bridged and connected over the three horizontal bone members of the first horizontal bone member 12, the second horizontal bone member 13, and the third horizontal bone member 14. ing. The vertical bone member 20 is located on the left side of FIG. 1 and is on the same side as the driver. Here, examples of the "joining" include spot welding, carbon dioxide arc welding, fastening means using bolts, nuts, and the like. By such "joining", the vertical bone member 20 is integrated with the three horizontal bone members. Thus, a rigid structure is formed. As shown in FIGS. 5 and 6, the vertical bone member 20 includes a front side plate 21 and a side plate 22. A collision detection sensor 23 is attached to a side surface side plate portion 22 of the vertical bone member 20 with a bolt (not shown). The collision detection sensor 23 senses a deceleration in the vehicle longitudinal direction which is larger than a predetermined deceleration. The airbag system described in the related art is operated by the collision detection sensor 23. Thus, in the present embodiment, in the cab-over vehicle 1, the cab 3 is mounted on the frame 2 and is separated from the frame 2 in terms of strength. Member 20, first, second and third horizontal bone members 1
The three-dimensional wide-area surface strength member K shown in FIG. 3 and formed by the front pillar members 10 and 10 can be formed on the cab 3. This wide-area surface strength member K forms a rigid structure. Therefore, when the cab 3 collides forward, the wide-area strength member K constituting the front side of the cab 3 is directly subjected to a collision.
The collision is transmitted accurately. When the front side of the cab 3 of the cab-over vehicle 1 collides, the wide surface strength member K of the cab 3 is crushed, but the wide surface strength member K is displaced as a whole. In the case of a one-sided collision, the wide surface strength member K is received as a whole. Since the collision detection sensor 23 is attached to the wide area surface strength member K, sensing by the sensor collision detection sensor 23 is possible. Accordingly, the displacement of the wide-area surface strength member K is transmitted to the collision detection sensor 23 via the vertical bone member 20, and the deceleration of the wide-area surface strength member K is sensed. For example, when one front side column member 10 of the wide area strength member K collides forward, the vertical bone member 20 which is a part of the wide area strength member K is decelerated,
The collision is detected by the collision detection sensor 23 mounted on the vertical bone member 20. According to the above configuration, in the cab-over vehicle 1, the cab 3 is mounted on the frame 2,
The frame 2 is separate from the frame 2 in terms of strength.
0, the frame 2 is formed by one three-dimensional wide area strength member K composed of the vertical bone member 20, the first, second, and third horizontal bone members 12, 13, 14, and the front column members 10, 10. A collision sensing surface that is not affected by the above can be configured. The three-dimensional wide-area surface strength member K is a vertical bone member 2
By including 0 as a component, the cab 3 can accurately transmit the deceleration to the collision detection sensor 23 in various forward collisions. Therefore, when the cab 3 collides forward, the wide-area surface strength member K constituting the front side of the cab 3 is directly collided, and the deceleration transmitted to the collision detection sensor 23 can be accurately and quickly increased. Sensitivity can be ensured. As a result, the reliability of the collision detection sensor 23 can be increased. Further, the area for sensing the deceleration spreads over the entire wide-area surface strength member K, and the cab 3 can be sensed in a wide area. As a result, the reliability of the collision detection sensor 23 can be increased. Further, in the collision detection sensor mounting structure for the cab-over vehicle of the present embodiment, the collision detection sensor 23 is mounted on the side plate 22 which is a portion of the vertical bone member 20 that is disposed substantially parallel to the vehicle longitudinal direction. Even if the vehicle 1 collides head-on with an obstacle, the vicinity of a connection portion between the front side plate portion 21 and the side surface plate portion 22 forming a T-shaped cross section or the front side plate portion 2
1 mainly deforms. Accordingly, if the collision detection sensor 23 is mounted at a position away from the vicinity of the connection portion of the side surface plate portion 22, the deformation of the side surface plate portion 21 at the position where the collision detection sensor 23 is mounted is slight. Can be suppressed, and the collision detection sensor can reliably detect the front collision of the cab-over vehicle 1 and can perform the detection earlier. In the present embodiment, the first horizontal bone member 12 is a bone member formed by closing the cross section in a box shape. However, the present invention is not limited to such a cross section. A bone member having an open cross section can also be used. Also,
The first horizontal bone member 12 is an independent member,
For example, a part of the front member 16 can be formed integrally with the front member 16. Further, in the present embodiment, the second horizontal bone member 13 is a bone member having a substantially C-shaped cross section which opens forward, but may be a bone member having a closed cross section structure.
Further, the second horizontal bone member 13 is an independent member. However, for example, the second horizontal bone member 13 may be formed integrally with the front member 16 to be a part of the front member 16. And in this Embodiment, the 3rd horizontal bone member 14
Although it is a bone member having a substantially U-shaped cross section that opens upward, it may be a bone member having a closed cross section structure. Further, the third horizontal bone member 14 is an independent member, but can be configured as a part of another panel. According to the first aspect of the present invention, the cab is a three-dimensional wide-area surface strength member composed of the vertical bone member, the horizontal bone member, and the front pillar member. When the cab collides forward, the wide-area surface member constituting the front side of the cab is directly subjected to a collision, so that the deceleration transmitted to the collision detection sensor by the wide-area surface member can be detected accurately and quickly. The sensitivity of the detection sensor can be ensured. Further, the area for sensing the deceleration spreads over the wide area surface strength member, and the cab can be sensed over a wide area.
Thus, the reliability of the collision detection sensor can be increased.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing a structure for mounting a collision detection sensor in a cab-over vehicle according to an embodiment of the present invention. FIG. 2 is an explanatory side view showing the mounting structure of the collision detection sensor. FIG. 3 is a conceptual diagram showing the collision detection sensor mounting structure. FIG. 4 is a cross-sectional view showing the collision detection sensor mounting structure. FIG. 5 is a perspective view showing a vertical bone member in the collision detection sensor mounting structure. FIG. 6 is a cross-sectional view showing the vertical bone member in the XX cross section of FIG. 5; FIG. 7 is an explanatory side view showing a state in which a collision detection sensor is mounted on a conventional passenger car. FIG. 8 is an explanatory side view of a cab-over vehicle when a collision detection sensor is mounted on a floor panel. [Description of Signs] 1 Cab-over vehicle 2 Frame 3 Cab 10 Front-side column member 12 First horizontal bone member 13 Second horizontal bone member 14 Third horizontal bone member 20 Vertical bone member 23 Collision detection sensor K Wide area strength member

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) B60R 21/00 B62D 25/08 G01P 15/00

Claims (1)

(1) A collision detection sensor in a cab-over vehicle (1) comprising a collision detection sensor (23) mounted in a cab (3) mounted on a frame (2). In the mounting structure, the cab (3) includes left and right front pillar members (10, 10).
And a plurality of transverse bone members (12, 13, 14) joined to the left and right front pillar members (10, 10) to constitute a front side.
And a vertical bone member (20) that is connected to the plurality of horizontal bone members (12, 13, 14) by being bridged on the driver's seat side. An upper reinforce, an instrument member disposed behind the front upper reinforce, and a front cross member disposed below the front upper reinforce, wherein the vertical bone member (20) has a front side plate ( 21) and a side plate (22) having a T-shaped cross section, and the three transverse bone members (1) on the driver's seat side.
2, 13 and 14), and the collision detection sensor (23) is connected to the vertical bone member (20).
A collision detection sensor mounting structure for a cab-over vehicle, wherein the collision detection sensor mounting structure is mounted on the side surface side plate portion (22) disposed substantially parallel to the vehicle front-rear direction.