JP6712970B2 - Vehicle inrush prevention device - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle rush prevention device equipped with a bumper capable of varying a protruding position and a retracted position of the bumper.

A dump vehicle or the like is provided with a bumper for preventing entry of another vehicle to prevent entry from the rear.
Further, the present applicant has proposed a vehicle rush prevention device capable of manually changing the projecting position and the retracted position by using a manual fixture (see Patent Document 1 below).
According to the invention of the present applicant, it is possible to provide a vehicle rush prevention device that reduces the burden on the operator and improves operability. Further, a structure in which a bumper is mechanically moved by using a drive device such as a hydraulic cylinder has also been used conventionally.

JP, 2014-19385, A

The following points have been found by the inventor to be a problem in the conventional mechanical drive type rush prevention device composed of the hydraulic cylinder and the like.
(A) In the vehicle body portion, a configuration can be made compact in at least one space in the vehicle vertical direction and the vehicle longitudinal direction. With a compact structure, the rush prevention device can be attached to the standard attachment hole for attaching the base plate, and the manufacturing cost may be reduced. In addition, the compact structure can reduce the risk of interference with movements of various vehicles such as a loading platform.
(B) To be able to have an emergency function with a simple configuration.
(C) A structure that enables stable operation of the link mechanism related to the inrush prevention device.
An object of the present invention is to provide a vehicle rush prevention device capable of solving the problems of the above-mentioned conventional techniques.
Further, the problems of the invention other than those described above, the means for solving the problems, and the effects thereof will be described in detail in the description in the later-described specification.

The present invention can be expressed in many ways. For example, a typical one is configured as follows. In each of the following inventions, each reference numeral is shown as an example for facilitating the understanding of the correspondence with the embodiments described later, and each component of the present invention corresponds to the configuration related to the reference numerals described in the embodiments. It goes without saying that it is not limited.
The vehicle rush prevention device for a vehicle according to the present invention is provided on the rear side of the vehicle 8 in the front-rear direction 9, and includes a first rotating shaft 1 provided on a base portion 10 at the rear of the vehicle 8 and the base portion. A second rotation shaft 2 provided in an intermediate region in the front-rear direction 9 of the first and second portions 10, and a third rotation shaft 3 provided in a front region of the base portion 10 in the front-rear direction 9;
A bumper mounting member 30 rotatably supported on the first rotating shaft 1,
A bumper 31 attached to the bumper attachment member 30 and extending in the vehicle width direction 25;
A fourth rotating shaft 4 provided on the bumper mounting member 30 between the mounting positions of the first rotating shaft 1 and the bumper 31;
One end side 11a is rotatably supported by the fourth rotation shaft 4, and is rotated by a fifth rotation shaft 5 provided on the other end side 11b opposite to the fourth rotation shaft 4. A first connecting member 11 supported freely,
A second connecting member 12 whose base end side 12a is rotatably supported by the second rotating shaft 2 and whose other end side 12b is rotatably supported by the fifth rotating shaft 5;
A base end side 13a is rotatably supported by the third rotation shaft 3, and a tip end side 13c of an elastic member 13b is rotatably supported by a sixth rotation shaft 6 of the second connecting member 12. Having a telescopic device 13 such as a hydraulic cylinder,
A bumper protruding position where the first connecting member 11 and the second connecting member 12 are extended by causing the elastic member 13b of the elastic device 13 to protrude rearward in the front-rear direction 9 of the vehicle so that a bumper function can be exhibited. Located at 15,
By retracting the elastic member 13b of the elastic device 13 to the front side in the front-rear direction 9 of the vehicle 8, the fifth rotating shaft 5 can be compared with the first connecting member 11 and the second connecting member 12 in the extended state. It is characterized in that it is configured to be bent upward at the position of and is positioned at the front bumper retreat position 16 (claim 1).
With this configuration, the first connecting member and the second connecting member can be bent upward at the position of the fifth rotation shaft as compared with the extended state. Further, as compared with the conventional configuration, a compact rush prevention device can be configured in at least one space in the vehicle vertical direction and the vehicle longitudinal direction.

An impact force of the bumper 31 during traveling or the like is received by the second rotating shaft 2 via the bumper mounting member 30, the first connecting member 11, and the second connecting member 12. (Claim 2).
The second rotating shaft 2 is configured to include a shaft body around which the left and right base parts 10 are bridged (claim 3).
According to this structure, the impact force related to the bumper can be received by the left and right base parts by including the shaft body that spans the left and right base parts.

The first rotating shaft 1 is set at a higher position in the up-down direction 17 of the vehicle 8 than the second rotating shaft 2 (claim 4).
The first rotating shaft 1 is set at a higher position in the up-down direction 17 of the vehicle 8 than the third rotating shaft 3 (claim 5).
The third rotation shaft 3 is set at the same height position as the second rotation shaft 2 in the up-down direction 17 or at a position higher than the second rotation shaft 2. (Claim 6).
Locking portions 35 and 36 are provided on the first connecting member 11 and the second connecting member 12 so that the first connecting member 11 and the second connecting member 12 are locked at a position below the horizontal line 32. It is characterized (Claim 7).

The two connecting members 11 are connected via the fifth pivot shaft 5 so that the first connecting member 11 and the second connecting member 12 are located above the lower consideration point when in the bumper protruding position 15. The angle θ formed by 12 is set to an angle of θ<180° (claim 8).
The lower consideration point is at the angle θ=180°.
With this configuration, the first connecting member and the second connecting member are less likely to bend upward at the bumper protruding position because the position is beyond the lower consideration point, and the impact force is applied to the second rotating shaft. You can take it with.
The fifth rotating shaft 5 supported by the first connecting member 11 and the second connecting member 12 when located at the bumper protruding position 15 is set to be positioned below the horizontal line 32. (Claim 9).
With this configuration, the first connecting member, the second connecting member, and the fifth rotating shaft have a state in which they hang down naturally from the horizon due to gravity, so that the impact at the time of a collision can be firmly received.

At the bumper retreat position 16, the force for rotating the bumper 31 is lower than the force for pulling down the bumper 31 such as rotating the second connecting member 12 via the first connecting member 11, and By setting 31 at a position beyond the upper thought point of the link for pulling down, it is set so that the force for pulling down the bumper 31 does not cause the bumper 31 to drastically descend (claim 10).
The positions and lengths of the first connecting member 11, the second connecting member 12, and the fifth rotating shaft 5 are set so as to exceed the upper consideration point for various forces that pull down the bumper 31. It is characterized by (claim 11).
With this configuration, even if a force that pushes down the bumper at the bumper retreat position is applied due to vibrations of the vehicle and other factors, the force that pushes down the bumper depends on the direction in which the bumper is pulled down. The bumper retracted position can be satisfactorily maintained even when a large vertical acceleration of a truck or the like is involved, for example, because it directly relates to the second rotation axis.

In the bumper retreat position 16, the force for rotating the bumper 31 is lower than the force for lowering the bumper 31 that rotates the second connecting member 12 via the first connecting member 11. The angle φ formed by the second connecting member 12 with respect to the horizontal line 32 with respect to the rotating shaft 2 is set to φ>90° (claim 12).
It should be noted that φ=90° is the upper consideration point.
Power transmission canceling means 28 for canceling power transmission between the expansion device 13 and the drive source 19 is provided so that the third rotation shaft 3 for the expansion device 13 can be manually rotated. (Claim 13).
It has a manual release tool 21 that can move the bumper mounting member 30, the first connecting member 11, and the second connecting member 12 from the extended state to the retracted position of the bumper 31. (Claim 14).
With this configuration, the bumper at the bumper protruding position can be manually moved to the bumper retreat position or the like by including the manual release tool.

It is characterized in that the releasing tool 21 has an engaging portion 21a which enables rotation of a required portion of the link mechanism by utilizing the principle of leverage (claim 15).
With this configuration, by utilizing the lever principle in the engaging portion when the releasing operation is performed, it is possible to select a bumper position corresponding to an emergency even with a weak manpower.
A spherical bearing having a spherical surface is adopted as a bearing of the first rotating shaft 1 (claim 16).
With this configuration, by employing the spherical bearing, the process of manually rotating the rotation shaft can be easily performed.

A spherical bearing is adopted not only for the first rotating shaft 1 but also for at least one of the second rotating shaft 2 and the third rotating shaft 3 as required (claim 17).
It has a portable communication device 24 for turning on/off the drive of said expansion/contraction device 13 (claim 18).
With this configuration, there are many advantages in that the bumper protruding position and the bumper retreat position can be changed appropriately according to the operator's intention even when the driver's seat such as a truck is left.
It is characterized in that a notifying device 26 is provided which emits different sounds corresponding to the expansion and retraction operations of the expansion/contraction member 13b of the expansion/contraction device 13 (claim 19).
This configuration reminds not only people who know the change in sound in advance but also people and vehicles around various work vehicles such as trucks that the state changes depending on the change in sound. The advantages such as safety can be obtained.

As described above, according to the present invention, it is possible to set compact in at least one of the vehicle vertical direction space and the vehicle longitudinal direction space. In addition, it was possible to provide an emergency function with a simple configuration. Furthermore, the operation of the link mechanism of the rush prevention device was able to maintain stable operation.

It is a side view of a bumper protrusion position state in the plunge prevention device according to the present embodiment. FIG. 6 is a side view of the rush prevention device according to the present embodiment in a state in which the bumper protruding position is transitioning to the bumper retreat position. It is a side view of a bumper retreat position state in the plunge prevention device according to the present embodiment. FIG. 4 is a schematic diagram showing a plan view of a bumper protruding position in the rush prevention device according to the present embodiment. (A) is a drawing in which the state of the link in the bumper protruding position is extracted and drawn, (B) is a schematic plan view thereof, and (C) is an enlarged end portion of the second connecting member on the fifth rotation axis side. It is a drawing. It is the figure which extracted and drew the state of the link in the bumper evacuation position state which concerns on this embodiment. It is a side view which shows an example of a releasing tool. FIG. 6 is a side view showing a state in which the release preventing device according to the present embodiment is used to manually rotate the release tool in a bumper protruding position state.

[First Embodiment]
Hereinafter, a first embodiment according to the present invention shown in FIGS. 1 to 8 will be described with reference to the drawings.
1 to 8 are views for explaining a vehicle rush prevention device according to an embodiment of the present invention.
As shown in FIG. 4, the vehicle rush prevention device according to the present embodiment is a mechanical drive type bumper device in which a bumper 31 is rotatably supported on a base portion 10 such as a frame provided at the rear of the vehicle. The vehicle rush prevention device has a pair of first rotating shafts 1. The pair of first rotating shafts 1 are erected on the left and right base portions 10 provided one by one in the vehicle width direction 25 (horizontal direction). In the configuration of the present embodiment, the first rotating shaft 1 to the sixth rotating shaft 6, the bumper mounting member 30, the first connecting member 11, and the second connecting member 12 are provided on at least the left and right base portions 10, respectively. Is.

[Explanation of Link Mechanism Related to Inrush Prevention Device]
1. Arrangement of Various Rotating Shafts As shown in FIGS. 1 to 4, a first rotating shaft 1 and a second rotating shaft 2 are provided on a base plate 14 which can be said to be a mounting plate for a base portion 10 such as a rear portion of a work vehicle. .. The second rotating shaft 2 includes a second bridging shaft 34 so that it can be bridged over the left and right base parts 10. The third rotation shaft 3 is arranged at a position in front of the second rotation shaft 2. In order to move the bumper 31 to the projecting position and the retracted position, the rotary shafts 1 to 3 are erected substantially vertically to the base portion 10.

Further, the bumper mounting member 30 that swings around the first rotating shaft 1 is provided with a fourth rotating shaft 4 that is erected in an intermediate region in the longitudinal direction of the bumper mounting member 30. Further, the first connecting member 11 and the second connecting member 12 are provided in the space between the fourth rotating shaft 4 and the second rotating shaft 2, and the connecting members 11 and 12 are rotatable. A fifth rotating shaft 5 is provided.
The second connecting member 12 is provided with a sixth rotating shaft 6. In the present embodiment, a configuration in which the sixth rotating shaft 6 is provided on the upper end surface of the second connecting member 12 is illustrated. The tip end portion 13c of the expansion/contraction member 13b is rotatably supported on the sixth rotation shaft 6. On the other hand, the base end side 13a of the expansion/contraction device 13 is rotatably supported by the third rotation shaft 3.
Further, in this embodiment, the length of each link member is
Bumper mounting member 30>second connecting member 12>first connecting member 11
It is set to the size of.
The bumper attaching member 30 is arranged at a position outside the first connecting member 11 and the second connecting member 12 in the vehicle width direction 25. However, this configuration can be changed as appropriate.

2. Linked state of bumper protruding position 15 As shown in FIG. 5B, the first connecting member 11 has a pair of plate-shaped members 11c and 11c. The fourth rotating shaft 4 and the fifth rotating shaft 5 are inserted through the ends of the pair of plate-shaped members 11c and 11c, respectively.
A lock plate portion 11d (shown by diagonal lines) is provided on the upper side of the pair of plate-shaped members 11c and 11c on the fifth rotating shaft 5 side, and the end portion thereof serves as the first connecting member side lock portion 35.
As shown in FIG. 5C, the upper end portion of the second connecting member 12 on the fifth rotating shaft 5 side is configured as the second connecting member side locking portion 36.

The second connecting member 12 is supported by the fifth rotating shaft 5 so as to be sandwiched between the pair of plate-shaped members 11c and 11c.
In order to retract the bumper 31 in the vehicle front direction, the first connecting member 11 and the second connecting member 12 are bent upward in the fifth rotating shaft 5 so that the first connecting member 11 and the second connecting member 12 are bent. And the positions of the fourth rotating shaft 4, the second rotating shaft 2, and the fifth rotating shaft 5 are set.
A configuration in which the second connecting member 12 is a pair of plate-shaped members and the first connecting member 11 is inserted can also be adopted as necessary.

3. Linked state at the bumper retreat position 16: The link mechanism is attached to the bumper by the retracting operation of the expansion/contraction member 13b from the sixth rotation shaft 6 of the second connecting member 12 via the second connecting member 12 and the first connecting member 11. By being transmitted to the member 30, the bumper 31 is moved to the state of FIG. 3 from FIG. 1 through FIG.
Specifically, the fifth pivot shaft 5 is bent upward in the space between the first connecting member 11 and the second connecting member 12, and the fifth rotating shaft 5 is folded in two upward so that the bumper 31 can be easily placed in front of the vehicle. It is configured to be retracted in the direction.
In the movement path from FIG. 1 to FIG. 2 to FIG. 3, the fourth rotating shaft 4 and the fifth rotating shaft 5 are moved so that the fourth rotating shaft 4 and the fifth rotating shaft 5 can be smoothly moved. The route of travel is examined in detail and the configuration of each link is set.

4. Structure of the expansion/contraction device 13 Only one expansion/contraction device 13 is provided on the base portion 10 on one side in the vehicle width direction 25. According to this structure, one expansion device 13 is provided on the base portion 10 on one side in the vehicle width direction 25, so that the expansion device 13 is provided on both sides in the vehicle width direction 25 at a lower cost. You can
Further, the vehicle 8 is provided with the drive source control device 33, and the extension/contraction device 13 is extended/contracted via the drive source control device 33 and the drive source 19 in response to a command from the portable communication device 24.
Further, a power transmission canceling means 28 is provided on at least one side of the drive source 19 and the expansion/contraction device 13 for an emergency configuration.

[Purpose and advantage of setting upper and lower points]
1. As shown in FIGS. 1 and 5, at the bumper projecting position 15 where the bumper 31 functions as a rush prevention means, the rotation center of the fourth rotation shaft 4 and the rotation of the second rotation shaft 2 are rotated. The fifth rotating shaft 5 is located below the bumper protruding position 15 with respect to the line connecting the centers. With this configuration, the lower limit of the first connecting member 11 and the second connecting member 12 is exceeded and the locking portions 35 and 36 are not bent further downward. Therefore, the bumper 31, the bumper attaching member 30, Through the first connecting member 11 and the second connecting member 12, it is possible to reliably receive the impact related to the second rotating shaft 2.

2. Idea of setting upper thought point As shown in FIG. 5 and FIG. 6, consider the force of pulling down the bumper 31 that rotates the second connecting member 12 via the first connecting member 11 at the bumper retreat position 16. Then, the turning force of the bumper 31 is set so that the angle φ formed by the horizontal line 32 and the second connecting member 12 with respect to the second turning shaft 2 is φ>90° so as to be related to the second turning shaft 2. I am doing it.
In the present embodiment, when the bumper mounting member 30 moves upward at the bumper retreat position 16, the second rotating shaft 2 is at a lower position than the fifth rotating shaft 5. Further, the center position of the fifth rotation shaft 5 is located on the front side in the front-rear direction 9 with respect to the center position of the second rotation shaft 2.

[Emergency configuration to prevent disadvantages in an emergency]
1. Considering, for example, a truck having a vehicle rush prevention device, it is possible that the vehicle rush prevention device does not work in an emergency such as a failure of an electric device or a drive device. However, it is inconvenient to avoid that this trouble makes it impossible to unload goods etc. placed on the bed of the truck.
Furthermore, in the event of an emergency such as a failure of an electric device or a drive device, the vehicle such as a truck is legally allowed to travel on the road when the bumper 31 is in the retracted state because the bumper 31 is not located at the entry prevention position. I can't. Further, this emergency configuration is provided from the viewpoint of ensuring the movement of the work vehicle such as a truck even if the electric device, the drive device, or the like breaks down while the bamba 31 is in the retracted state.

2. This process is performed, for example, by performing the following process.
(Process 1) The power transmission canceling means 28 is used to cancel the expansion/contraction device 13 and the drive source 19. For this purpose, the structure adopting the expansion/contraction device 13 in which the power transmission canceling means 28 is provided in advance is simple.
(Process 2) By selecting the rotary shafts that need to be released among the various rotary shafts 1 to 6 by an engaging method such as inserting the release tool 21 at a position where the components of each link do not mechanically move. , Unlink.
(Process 3) The bumper protruding position 15 is manually moved to the bumper retreat position 16.
For example, in terms of the link mechanism, the link mechanism and the bumper 31 are located at the bumper retreat position 16 where the angle φ exceeds 90°.

In the case of the embodiment as an example, the engaging portion 21a of the release tool 21 as shown in FIG. 7 is made to protrude into the place where the rotation of the fourth rotation shaft 4 is difficult as shown in FIG. The manual operation is realized by moving the grip of the release tool 21 downward.
In addition, in the configuration of the present embodiment, since the spherical bearing is used for at least the first rotation shaft 1, it is possible to suppress the difficulty of manual rotation due to twisting or tilting of various rotation shafts. I am doing it.

[Configuration of portable communication device and external notification means]
This vehicle rush prevention device is characterized by having a portable communication device 24 that can be held in a pocket or the like by a driver such as a truck. The portable communication device 24 has a function of appropriately changing the bumper projecting position 15 and the bumper retreat position 16 according to the operator's intention even when the driver's seat such as a truck is left. That is, the portable communication device 24 has a function of controlling the drive source 19 of the expansion/contraction device 13 by communication means.

In addition, the movement of the bumper 31 has various influences on the external environment, and it is safe to widely notify not only the driver who is operating the vehicle but also those outside the vehicle. Also has advantages.
Therefore, in the present embodiment, due to the portable communication device 24, the notification device 26 is provided that emits different sounds corresponding to the extension operation and the retraction operation of the elastic member 13c of the elastic device 13. The position where the notification device 26 such as a speaker that emits different sounds is provided can be appropriately provided at each position such as the front portion, the middle portion, and the rear portion of the truck. The different sounds also include voice guidance in words.

The present invention can be variously modified in addition to the above-described embodiment without departing from the spirit of the present invention.
(1) The vehicle rush prevention device according to the present invention is generally provided at the rear of the vehicle. However, the present invention does not necessarily exclude that the vehicle is disposed in another place of the vehicle. In the description corresponding to each claim in the specification, the rear part of the vehicle can be read as a front part or a side part, and the same invention can be implemented.
(2) If necessary, the vehicle rush prevention device according to the present embodiment can be provided on the base body portion 10 itself of the vehicle body without providing the base plate 14.
(3) The configuration in which the upper consideration point and the lower consideration point in the present embodiment are described as one embodiment, and compared with the configuration in which the first connecting member and the second connecting member are bent upward, It should be recognized that this is a secondary preferred configuration.

1... 1st rotation axis 2... 2nd rotation axis 3... 3rd rotation axis 4... 4th rotation axis 5... 5th rotation axis 6... 6th rotation axis 8... Vehicle 9... Front-back direction 10 ... Base part 11... First connecting member 11a... One end side 11b... Other end side 12... Second connecting member 12a... Base end side 12b... Other end side 13... Telescopic device 13a... Base end side 13b... Telescopic member 13c... Tip. Side 15... Bumper protruding position 16... Bumper retracting position 17... Vertical direction 19... Drive source 21... Release tool 21a... Engagement portion 24... Portable communication device 25... Vehicle width direction 26... Notification device 28... Power transmission release means 30 ...Bumper mounting member 31...Bumper 32...Horizontal line 34...Second bridge shaft (shaft body)
35... 1st connection member side lock location 36... 2nd connection member side lock location (theta)... Angle formed by two connection members via the 5th rotating shaft (phi)... Angle formed by the 2nd connection member with respect to a horizontal line

Claims (13)

The first turning shaft (1) provided on the rear side of the vehicle (8) in the front-rear direction (9) and provided on the rear body portion (10) of the vehicle (8) and the base body portion (10). A second rotating shaft (2) provided in an intermediate region in the front-rear direction (9), and a third rotating shaft (3) provided in a front region of the base portion (10) in the front-rear direction (9). ,
A bumper mounting member (30) rotatably supported on the first rotating shaft (1),
A bumper (31) attached to the bumper attaching member (30) and extending in the vehicle width direction (25);
A fourth rotation shaft (4) provided on the bumper mounting member (30) between the first rotation shaft (1) and the mounting position of the bumper (31);
One end side (11a) is rotatably supported by the fourth rotation shaft (4) and is provided on the other end side (11b) opposite to the fourth rotation shaft (4). A first connecting member (11) rotatably supported by five rotation shafts (5),
A base end side (12a) rotatably supported by the second rotation shaft (2) and a second end side (12b) rotatably supported by the fifth rotation shaft (5). 2 connecting members (12),
The base end side (13a) is rotatably supported by the third rotation shaft (3), and the distal end side (13c) of the expansion and contraction member (13b) is rotated by the sixth rotation of the second connecting member (12). It has a telescopic device (13) such as a hydraulic cylinder rotatably supported on a shaft (6),
By making the elastic member (13b) of the elastic device (13) project rearward in the longitudinal direction (9) of the vehicle, the first connecting member (11) and the second connecting member (12) are extended. Position it at the bumper protruding position (15) where it can exert the bumper function,
The first connecting member (11) and the second connecting member (12) are extended by pulling the elastic member (13b) of the elastic device (13) forward of the vehicle (8) in the front-rear direction (9). Compared to the above state, the fifth pivot shaft (5) is folded upward at the position of the fifth rotation shaft (5), and is positioned at the front bumper retreat position (16) .
The vehicle intrusion prevention device, wherein the first turning shaft (1) is set at a higher position in the vertical direction (17) of the vehicle (8) than the second turning shaft (2). The first turning shaft (1) provided on the rear side of the vehicle (8) in the front-rear direction (9) and provided on the rear body portion (10) of the vehicle (8) and the base body portion (10). A second rotating shaft (2) provided in an intermediate region in the front-rear direction (9), and a third rotating shaft (3) provided in a front region of the base portion (10) in the front-rear direction (9). ,
A bumper mounting member (30) rotatably supported on the first rotating shaft (1),
A bumper (31) attached to the bumper attaching member (30) and extending in the vehicle width direction (25);
A fourth rotation shaft (4) provided on the bumper mounting member (30) between the first rotation shaft (1) and the mounting position of the bumper (31);
One end side (11a) is rotatably supported by the fourth rotation shaft (4) and is provided on the other end side (11b) opposite to the fourth rotation shaft (4). A first connecting member (11) rotatably supported by five rotation shafts (5),
A base end side (12a) rotatably supported by the second rotation shaft (2) and a second end side (12b) rotatably supported by the fifth rotation shaft (5). 2 connecting members (12),
The base end side (13a) is rotatably supported by the third rotation shaft (3), and the distal end side (13c) of the expansion and contraction member (13b) is rotated by the sixth rotation of the second connecting member (12). It has a telescopic device (13) such as a hydraulic cylinder rotatably supported on a shaft (6),
By making the elastic member (13b) of the elastic device (13) project rearward in the longitudinal direction (9) of the vehicle, the first connecting member (11) and the second connecting member (12) are extended. Position it at the bumper protruding position (15) where it can exert the bumper function,
The first connecting member (11) and the second connecting member (12) are extended by pulling the elastic member (13b) of the elastic device (13) forward of the vehicle (8) in the front-rear direction (9). Compared to the above state, the fifth pivot shaft (5) is folded upward at the position of the fifth rotation shaft (5), and is positioned at the front bumper retreat position (16) .
The vehicle intrusion prevention device, wherein the first rotation shaft (1) is set at a higher position in the vertical direction (17) of the vehicle (8) than the third rotation shaft (3). The vehicle rush prevention device according to any one of claims 1 and 2, wherein the third rotating shaft (3) is the same as the second rotating shaft (2) in the vertical direction (17). A vehicle intrusion prevention device which is set at a height position or a position higher than the second rotation shaft (2). The first turning shaft (1) provided on the rear side of the vehicle (8) in the front-rear direction (9) and provided on the rear body portion (10) of the vehicle (8) and the base body portion (10). A second rotating shaft (2) provided in an intermediate region in the front-rear direction (9), and a third rotating shaft (3) provided in a front region of the base portion (10) in the front-rear direction (9). ,
A bumper mounting member (30) rotatably supported on the first rotating shaft (1),
A bumper (31) attached to the bumper attaching member (30) and extending in the vehicle width direction (25);
A fourth rotation shaft (4) provided on the bumper mounting member (30) between the first rotation shaft (1) and the mounting position of the bumper (31);
One end side (11a) is rotatably supported by the fourth rotation shaft (4) and is provided on the other end side (11b) opposite to the fourth rotation shaft (4). A first connecting member (11) rotatably supported by five rotation shafts (5),
A base end side (12a) rotatably supported by the second rotation shaft (2) and a second end side (12b) rotatably supported by the fifth rotation shaft (5). 2 connecting members (12),
The base end side (13a) is rotatably supported by the third rotation shaft (3), and the distal end side (13c) of the expansion and contraction member (13b) is rotated by the sixth rotation of the second connecting member (12). It has a telescopic device (13) such as a hydraulic cylinder rotatably supported on a shaft (6),
By making the expansion/contraction member (13b) of the expansion/contraction device (13) project rearward in the vehicle longitudinal direction (9), the first connecting member (11) and the second connecting member (12) are extended. Position it at the bumper protruding position (15) where it can exert the bumper function,
The first connecting member (11) and the second connecting member (12) are extended by pulling the elastic member (13b) of the elastic device (13) forward of the vehicle (8) in the front-rear direction (9). Compared to the above state, the fifth pivot shaft (5) is folded upward at the position of the fifth rotation shaft (5), and is positioned at the front bumper retreat position (16) .
The first connecting member (11) and the second connecting member (12) are locked at a position lower than a horizontal line (32) in which the first connecting member (11) and the second connecting member (12) are horizontally aligned. As described above, the vehicle intrusion prevention device, wherein the first connecting member (11) and the second connecting member (12) are provided with locking portions (35, 36). The first turning shaft (1) provided on the rear side of the vehicle (8) in the front-rear direction (9) and provided on the rear body portion (10) of the vehicle (8) and the base body portion (10). A second rotating shaft (2) provided in an intermediate region in the front-rear direction (9), and a third rotating shaft (3) provided in a front region of the base portion (10) in the front-rear direction (9). ,
A bumper mounting member (30) rotatably supported on the first rotating shaft (1),
A bumper (31) attached to the bumper attaching member (30) and extending in the vehicle width direction (25);
A fourth rotation shaft (4) provided on the bumper mounting member (30) between the first rotation shaft (1) and the mounting position of the bumper (31);
One end side (11a) is rotatably supported by the fourth rotation shaft (4) and is provided on the other end side (11b) opposite to the fourth rotation shaft (4). A first connecting member (11) rotatably supported by five rotation shafts (5),
A base end side (12a) rotatably supported by the second rotation shaft (2) and a second end side (12b) rotatably supported by the fifth rotation shaft (5). 2 connecting members (12),
The base end side (13a) is rotatably supported by the third rotation shaft (3), and the distal end side (13c) of the expansion and contraction member (13b) is rotated by the sixth rotation of the second connecting member (12). It has a telescopic device (13) such as a hydraulic cylinder rotatably supported on a shaft (6),
By making the expansion/contraction member (13b) of the expansion/contraction device (13) project rearward in the vehicle longitudinal direction (9), the first connecting member (11) and the second connecting member (12) are extended. Position it at the bumper protruding position (15) where it can exert the bumper function,
The first connecting member (11) and the second connecting member (12) are extended by pulling the elastic member (13b) of the elastic device (13) forward of the vehicle (8) in the front-rear direction (9). Compared to the above state, the fifth pivot shaft (5) is folded upward at the position of the fifth rotation shaft (5), and is positioned at the front bumper retreat position (16) .
The angle between the first connecting member (11) and the second connecting member (12) at the bumper protruding position (15) is above the lower consideration point of θ=180° . An inrush prevention device for a vehicle, wherein an angle (θ) formed by two connecting members (11, 12) through the fifth rotation shaft (5) is set to an angle of θ<180°. The first turning shaft (1) provided on the rear side of the vehicle (8) in the front-rear direction (9) and provided on the rear body portion (10) of the vehicle (8) and the base body portion (10). A second rotating shaft (2) provided in an intermediate region in the front-rear direction (9), and a third rotating shaft (3) provided in a front region of the base portion (10) in the front-rear direction (9). ,
A bumper mounting member (30) rotatably supported on the first rotating shaft (1),
A bumper (31) attached to the bumper attaching member (30) and extending in the vehicle width direction (25);
A fourth rotation shaft (4) provided on the bumper mounting member (30) between the first rotation shaft (1) and the mounting position of the bumper (31);
One end side (11a) is rotatably supported by the fourth rotation shaft (4) and is provided on the other end side (11b) opposite to the fourth rotation shaft (4). A first connecting member (11) rotatably supported by five rotation shafts (5),
A base end side (12a) rotatably supported by the second rotation shaft (2) and a second end side (12b) rotatably supported by the fifth rotation shaft (5). 2 connecting members (12),
The base end side (13a) is rotatably supported by the third rotation shaft (3), and the distal end side (13c) of the expansion and contraction member (13b) is rotated by the sixth rotation of the second connecting member (12). It has a telescopic device (13) such as a hydraulic cylinder rotatably supported on a shaft (6),
By making the expansion/contraction member (13b) of the expansion/contraction device (13) project rearward in the vehicle longitudinal direction (9), the first connecting member (11) and the second connecting member (12) are extended. Position it at the bumper protruding position (15) where it can exert the bumper function,
The first connecting member (11) and the second connecting member (12) are extended by pulling the elastic member (13b) of the elastic device (13) forward of the vehicle (8) in the front-rear direction (9). Compared to the above state, the fifth pivot shaft (5) is folded upward at the position of the fifth rotation shaft (5), and is positioned at the front bumper retreat position (16) .
In the bumper retreat position (16), the bumper (31) is pulled down against the force of pulling down the bumper (31) such as rotating the second coupling member (12) through the first coupling member (11). ) Is a rush for a vehicle in which the angle (φ) formed by the second connecting member (12) with respect to the horizontal line (32) is set to φ>90° so that the force for rotating the second rotating shaft (2) relates to the second rotating shaft (2). Prevention device. The vehicle rush prevention device according to any one of claims 1 to 6 ,
Power transmission canceling means for canceling power transmission between the expansion device (13) and the drive source (19) so that the third rotation shaft (3) for the expansion device (13) can be manually rotated. A vehicle inrush prevention device provided with (28). The vehicle rush prevention device according to any one of claims 1 to 7 , wherein the bumper mounting member (30), the first connecting member (11), and the second connecting member (12) are extended. A vehicle inrush prevention device having a manual release tool (21) that can be moved from the closed state to a position near the retracted position of the bumper (31). 9. The vehicle rush prevention device according to claim 8 , wherein the releasing tool (21) has an engaging portion (21a) that enables rotation of a necessary portion of the link mechanism by utilizing a lever principle. Vehicle rush prevention device. The vehicle inrush prevention device according to any one of claims 1 to 9, wherein a spherical bearing having a spherical surface is used as a bearing of the first rotating shaft (1). The vehicle rush prevention device according to any one of claims 1 to 10 , wherein not only the first rotating shaft (1) but also the second rotating shaft (2) and A vehicle rush prevention device employing a spherical bearing on at least one of the three rotation shafts (3). The vehicle inrush prevention device according to any one of claims 1 to 11 , further comprising a portable communication device (24) for turning on/off the drive of the expansion/contraction device (13). Prevention device. The vehicle rush prevention device according to any one of claims 1 to 12 , wherein a notification device that emits different sounds corresponding to the extension operation and the retraction operation of the elastic member (13b) of the elastic device (13). A vehicle inrush prevention device provided with (26).

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