JP2019018599A - Rush prevention device for vehicle - Google Patents

Abstract

To provide spaces compactly configured in an up to down direction or a front to back direction.SOLUTION: The present invention includes a first rotary shaft 1 provided on a base part 10 of a vehicle 8, a second rotary shaft 2 provided in an intermediate area of the base part 10, a third rotary shaft 3 provided in a front area of the base part 10, a bumper attachment member 30 rotatably supported by the first rotary shaft 1, a fourth rotary shaft 4 provided on the bumper attachment member 30, a first connection member 11 supported by a fifth rotary shaft 5, a second connection member 12 rotatably supported by the fifth rotary shaft 5, and an extension device 13 such as a hydraulic cylinder rotatably supported by the third rotary shaft 3. An extension member 13b of the extension device 13 is allowed to protrude rearward and thereby is shifted to a bumper protruded position 15. The extension member 13b is pulled forward and thereby is shifted to a bumper retracted position 16.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a vehicular intrusion prevention device including a bumper that can change a protruding position and a retracted position of a bumper.

A dump vehicle or the like is provided with a bumper for preventing entry of another vehicle from the rear portion.
Further, the present applicant has proposed a vehicular intrusion prevention device that can manually change the protruding position and the retracted position using a manual fixing tool (see Patent Document 1 below).
If it is the invention which concerns on the said applicant, the rush prevention apparatus for vehicles which reduced the burden of the operator and improved operativity can be provided. In addition, a configuration in which a bumper is mechanically moved using a driving device such as a hydraulic cylinder has been conventionally used.

JP2014-19385A

The following points have been found by the inventor of the present invention to be a problem in the conventional mechanical drive type rush prevention device composed of the hydraulic cylinder and the like.
(A) The base portion of the vehicle may be configured to be compact in at least one space in the vehicle vertical direction and the vehicle front-rear direction. With a compact configuration, the intrusion prevention device can be attached to a standard attachment hole for attaching the base plate, and the manufacturing cost may be reduced. Moreover, the danger of being interfered with the movement of various vehicles, such as a loading platform, can be reduced by comprising compactly.
(B) To be able to provide an emergency function with a simple configuration.
(C) The link mechanism related to the rush prevention device should be configured to be able to operate stably.
An object of the present invention is to provide a vehicular intrusion prevention device that can solve the above-described problems of the prior art.
Further, problems of the invention other than those described above, means for solving the problems, and effects thereof will be described in detail in the description in the specification to be described later.

Although the present invention can be expressed in many ways, for example, typical ones are configured as follows. In each of the following inventions, each symbol is shown as an example for easy understanding of the correspondence with the embodiment described later, and each component of the present invention corresponds to the configuration related to the symbol described in the embodiment. It goes without saying that it is not limited.
The vehicle intrusion 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 of the rear portion 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 tenth, a third rotation shaft 3 provided in a front side region of the base portion 10 in the front-rear direction 9, and
A bumper mounting member 30 rotatably supported by the first rotation 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 first rotating 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 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 having a base end 12a rotatably supported by the second rotating shaft 2 and a second end 12b rotatably supported by the fifth rotating shaft 5;
The base end side 13a is rotatably supported by the third rotating shaft 3, and the distal end side 13c of the telescopic member 13b is rotatably supported by the sixth rotating shaft 6 of the second connecting member 12. 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 projecting the expansion / contraction member 13b of the expansion / contraction device 13 rearward in the front-rear direction 9 of the vehicle. 15
By retracting the telescopic member 13b of the telescopic device 13 to the front side in the front-rear direction 9 of the vehicle 8, the fifth rotating shaft 5 is compared with the state in which the first connecting member 11 and the second connecting member 12 are extended. It is configured such that it is folded upward at the position and is located at the bumper retracting position 16 on the front side (Claim 1).
If it is this structure, compared with the state which extended the 1st connection member and the 2nd connection member, it can be set as the state folded upwards in the position of the 5th rotating shaft. Further, as compared with the conventional configuration, a compact intrusion prevention device can be configured in at least one space in the vehicle vertical direction and the vehicle longitudinal direction.

The impact force of the bumper 31 during traveling or the like is configured to be received by the second rotating shaft 2 through the bumper mounting member 30, the first connecting member 11, and the second connecting member 12. (Claim 2).
The second rotating shaft 2 includes a shaft body that spans the left and right base portions 10 (Claim 3).
If it is this structure, the impact force which concerns on a bumper can be received by the right and left base | substrate part by comprising the shaft body which spanned the left and right base | substrate parts.

The first rotation shaft 1 is set at a higher position in the vertical direction 17 of the vehicle 8 than the second rotation shaft 2 (Claim 4).
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 (Claim 5).
The third rotation shaft 3 is set at the same height position in the vertical direction 17 as the second rotation shaft 2 or at a higher position than the second rotation shaft 2. (Claim 6).
Lock 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 below the horizontal line 32. It is characterized (claim 7).

The two connecting members 11 are interposed via the fifth pivot shaft 5 so that the first connecting member 11 and the second connecting member 12 are located at a position beyond the lower thought point when in the bumper protruding position 15. The angle θ formed by 12 is set to an angle of θ <180 ° (claim 8).
Note that the lower thought point is at an angle of θ = 180 °.
If it is this structure, since it exists in the position beyond the lower thought point, in a bumper protrusion position, a 1st connection member and a 2nd connection member become difficult to bend upward, and an impact force is 2nd rotating shaft. You can catch it.
The fifth rotation shaft 5 supported by the first connecting member 11 and the second connecting member 12 at the bumper protruding position 15 is set to be positioned below the horizontal line 32. (Claim 9).
If it is this structure, since it will be in the state which hung down naturally rather than the horizon line by the gravity which a 1st connection member, a 2nd connection member, and a 5th rotating shaft have, it can receive the impact at the time of a collision firmly.

At the bumper retracting position 16, the force of rotating the bumper 31 against the force of pulling down the bumper 31 that rotates the second connecting member 12 via the first connecting member 11 is the bumper. The bumper 31 is set so that the bumper 31 is not greatly lowered by the force of pulling down the bumper 31 by setting the position beyond the upper thought point of the link to pull down 31 (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 thought point for various forces that pull down the bumper 31. (Claim 11).
With this configuration, even if a force that pushes down the bumper in the bumper retracted position is applied due to vibrations or other factors related to the vehicle, the force that pushes down the bumper is related to the direction in which the bumper is pulled down. Therefore, the bumper retracting position can be satisfactorily maintained even when a large vertical acceleration of a track or the like is involved, for example.

In the bumper retracting position 16, the force to turn the bumper 31 against the force to pull down the bumper 31 that turns the second connecting member 12 through the first connecting member 11 is the second force. An angle φ formed by the second connecting member 12 with respect to the horizontal line 32 so as to be related to the rotating shaft 2 is set to φ> 90 ° (claim 12).
Note that φ = 90 ° is the upper thought point.
Power transmission release means 28 for releasing the 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 toward the retracted position of the bumper 31. (Claim 14).
If it is this structure, a bumper in a bumper protrusion position can be manually moved to a bumper retreat position etc. by having a manual release tool.

The release tool 21 has an engaging portion 21a that enables pivoting of a required portion of the link mechanism using the lever principle (claim 15).
According to this configuration, the bumper position corresponding to an emergency can be selected even by a weak human power by utilizing the lever principle in the engaging portion when performing the releasing operation.
A spherical bearing having a spherical surface is adopted as the bearing of the first rotating shaft 1 (claim 16).
If it is this structure, it will become easy to perform the process which rotates a rotating shaft manually by employ | adopting a spherical bearing.

If necessary, spherical bearings are employed not only in the first rotation shaft 1 but also in at least one of the second rotation shaft 2 and the third rotation shaft 3 (Claim 17).
It has the portable communication apparatus 24 which implement | achieves on / off of the drive of the said expansion-contraction apparatus 13 (Claim 18).
With this configuration, for example, there are many advantages in that the bumper protruding position and the bumper retracting position can be appropriately changed according to the operator's intention even after leaving the driver's seat such as a truck.
A notification device 26 that emits a different sound corresponding to the extending operation and the retracting operation of the expansion member 13b of the expansion device 13 is provided (claim 19).
With this configuration, not only people who know changes in sound in advance, but also people and vehicles around various work vehicles such as trucks will be reminded of different states due to changes in sound. Advantages such as safety can be obtained.

  As described above, according to the present invention, it can be set compactly in at least one of the space in the vehicle vertical direction and the vehicle longitudinal direction. In addition, the emergency function could be provided with a simple configuration. Furthermore, stable operation could be maintained by the operation of the link mechanism of the inrush prevention device.

It is a side view of a bumper protrusion position state in the rush prevention device concerning this embodiment. It is a side view of the state in the middle of changing to a bumper evacuation position from a bumper protrusion position in the rush prevention device concerning this embodiment. It is a side view of a bumper evacuation position state in the rush prevention device concerning this embodiment. It is a schematic diagram which shows the top view of a bumper protrusion position state in the rush prevention apparatus which concerns on this embodiment. (A) is a drawing depicting the state of the link in the bumper protruding position state, (B) is a schematic plan view thereof, and (C) is an enlarged view of the end of the second connecting member on the fifth rotating shaft side. It is the figure drawn. It is the figure which extracted and drawn the state of the link in the bumper evacuation position state concerning this embodiment. It is a side view which shows an example of a cancellation | release tool. In the rush prevention device concerning this embodiment, it is a side view showing signs that it can be rotated manually using a 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.
FIGS. 1-8 is a figure for demonstrating the inrush prevention apparatus for vehicles which concerns on embodiment of this invention.
As shown in FIG. 4, the vehicle intrusion prevention device according to the present embodiment is a mechanically driven 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 vehicular 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 (left and right direction). In the configuration of the present embodiment, the first rotation shaft 1 to the sixth rotation shaft 6, the bumper mounting member 30, the first connection member 11, and the second connection member 12 are respectively provided on at least the base portions 10 on both the left and right sides. It is.

[Explanation of link mechanism related to inrush prevention device]
1. Device for Arrangement of Various Rotating Shafts As shown in FIGS. 1 to 4, the first rotating shaft 1 and the second rotating shaft 2 are provided on a base plate 14 that can also be referred to as a mounting plate for a base portion 10 such as a rear portion of a work vehicle. . The second rotating shaft 2 is configured to include a second spanning shaft 34 so that the second pivoting shaft 2 can be bridged to the left and right base portions 10. The third rotation shaft 3 is disposed at a position ahead of the second rotation shaft 2. Each of the rotation shafts 1 to 3 is erected substantially perpendicular to the base portion 10 so that the bumper 31 can be moved to the protruding position and the retracted position.

In addition, a fourth rotation shaft 4 is provided on a bumper mounting member 30 that swings about the first rotation shaft 1 as a rotation center. In addition, 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 described above, 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 this embodiment, the structure by which the 6th rotating shaft 6 was provided in the upper end surface of the 2nd connection member 12 is illustrated. The sixth rotating shaft 6 is configured such that the distal end portion 13c of the elastic member 13b is rotatably supported. On the other hand, the base end side 13 a of the telescopic device 13 is rotatably supported by the third rotation shaft 3.
In this embodiment, the length of each link member is
Bumper mounting member 30> second connecting member 12> first connecting member 11
Is set to the size of
The bumper mounting 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. Link 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 into the ends of the pair of plate-shaped members 11c and 11c, respectively.
A lock plate portion 11d (shown by hatching) is provided on the upper side of the pair of plate-shaped members 11c, 11c on the fifth rotating shaft 5 side, and the end portion is used as the first connecting member-side lock portion 35.
As shown in FIG. 5C, the upper end of the second connecting member 12 on the fifth rotating shaft 5 side is configured as a second connecting member-side lock location 36.

The second connecting member 12 is supported by the fifth rotation 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 on 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 rotation shaft 4, the second rotation shaft 2, and the fifth rotation shaft 5 are set.
In addition, the structure which inserts the 1st connection member 11 by making the 2nd connection member 12 into a pair of plate-shaped member is employable as needed.

3. Link state of bumper retracting position 16 The link mechanism is mounted on the bumper via the second connecting member 12 and the first connecting member 11 from the sixth rotating shaft 6 of the second connecting member 12 by the retracting operation of the telescopic member 13b. By being transmitted to the member 30, the bumper 31 is moved from the state shown in FIG. 1 to the state shown in FIG.
Specifically, the fifth rotating shaft 5 bends upward in the space between the first connecting member 11 and the second connecting member 12 and is folded in the upward direction, so that the bumper 31 can be easily attached to the front of the vehicle. It is configured to retract in the direction.
In the movement path from FIG. 1 through FIG. 2 to FIG. 3, the fourth rotation shaft 4 and the fifth rotation shaft 5 can be moved smoothly so that the fourth rotation shaft 4 and the fifth rotation shaft 5 can be moved smoothly. The structure of each link is set by examining the movement route in detail.

4). Configuration of Telescopic Device 13 Only one telescopic device 13 is provided on the base portion 10 on one side in the vehicle width direction 25. With this configuration, a single expansion device 13 is provided on the base portion 10 on one side in the vehicle width direction 25, so that the configuration is less expensive than a configuration in which the expansion device 13 is provided on both sides in the vehicle width direction 25. Can do.
In addition, a drive source control device 33 is provided in the vehicle 8, and the extension / contraction operation of the extension / contraction device 13 is performed via the drive source control device 33 and the drive source 19 according to a command from the portable communication device 24.
Moreover, the power transmission cancellation | release means 28 is provided in the at least one side of the drive source 19 and the expansion-contraction apparatus 13 for emergency structure.

[Purpose and advantages of setting upper and lower points]
1. Ingenuity for Setting the Lower Thinking Point As shown in FIGS. 1 and 5, the rotation center of the fourth rotation shaft 4 and the rotation of the second rotation shaft 2 at the bumper protruding position 15 where the bumper 31 functions as an entry preventing means. The fifth rotation shaft 5 is positioned below the bumper protruding position 15 with respect to the line connecting the centers. With this configuration, the lower thinking point of the first connecting member 11 and the second connecting member 12 is exceeded, and it is not intended to bend further downward at the lock portions 35 and 36. Therefore, the bumper 31, the bumper mounting member 30, Through the first connecting member 11 and the second connecting member 12, it is possible to reliably receive an impact related to the second rotating shaft 2.

2. As shown in FIGS. 5 and 6, let us consider a force that pulls down the bumper 31 that rotates the second connecting member 12 through the first connecting member 11 at the bumper retracting position 16. The angle φ between the horizontal line 32 and the second connecting member 12 with respect to the second rotating shaft 2 is set so that φ> 90 ° so that the force for rotating the bumper 31 is related to the second rotating shaft 2. It is.
In the present embodiment, when the bumper mounting member 30 moves upward at the bumper retracting position 16, the second rotation shaft 2 is positioned lower than the fifth rotation 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 avoid disadvantages in an emergency]
1. In the case of a truck vehicle having a vehicle entry prevention device, for example, it is conceivable that the vehicle entry prevention device may not move in an emergency such as a failure of an electric device or a drive device. However, it is an inconvenience that should be avoided that it becomes impossible to unload the goods placed on the truck bed due to this trouble.
Furthermore, in the event of an emergency such as a failure of an electric device or a drive device, when the bumper 31 is in the retracted state, a vehicle such as a truck must legally run on the road 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 a work vehicle such as a truck even when the electric device, the drive device, or the like breaks down while the bumper 31 is in the retracted state.

2. This process is performed by performing the following process as an example.
(Processing 1) The power transmission canceling means 28 is used to cancel the expansion device 13 and the drive source 19. For this purpose, the configuration employing the telescopic device 13 in which the power transmission release means 28 is provided in advance is simple.
(Process 2) Select a rotation shaft that needs to be released among the various rotation shafts 1 to 6 by an engagement method such as inserting the release tool 21 at a position where each link component does not move mechanically. , Unlink.
(Process 3) The bumper protruding position 15 is moved to the bumper retracting position 16 manually.
For example, the link mechanism and the bumper 31 are positioned at the bumper retracting position 16 where the angle φ exceeds 90 ° in terms of the link mechanism.

In the embodiment as an example, the engaging portion 21a of the release tool 21 as shown in FIG. 7 is inserted into a place where the rotation of the fourth rotating shaft 4 is difficult as shown in FIG. The manual operation is realized by moving the gripping portion of the release tool 21 downward.
Further, in the configuration of the present embodiment, since a spherical bearing is employed for at least the first rotation shaft 1, it is possible to prevent manual rotation from becoming difficult due to twisting or tilting of various rotation shafts. It is.

[Configuration of portable communication device and external notification means]
This vehicle intrusion prevention device is characterized in that it has 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 that allows the bumper protruding position 15 and the bumper retracting position 16 to be appropriately changed according to the operator's intention even after leaving the driver's seat such as a truck. That is, the portable communication device 24 has a function capable of controlling the drive source 19 of the telescopic device 13 by the communication means.

In addition, the movement of the bumper 31 has various effects in the external environment, and it is safe to widely notify the movement to not only the driver who is operating, but also the people outside. Also has advantages.
Therefore, in the present embodiment, due to the portable communication device 24, a notification device 26 that emits different sounds corresponding to the extending operation and the retracting operation of the expansion member 13c of the expansion device 13 is provided. The position of providing the notification device 26 such as a speaker that emits different sounds can be appropriately provided at each position such as the front, middle, and rear of the track. Different sounds also include voice guidance by words.

The present invention can be variously modified within the scope of the present invention other than the above embodiment.
(1) The vehicle entry prevention device according to the present invention is generally provided behind the vehicle. However, the present invention does not necessarily exclude the arrangement in other parts of the vehicle. In the description corresponding to each claim in the specification, the invention can be implemented as a similar invention by replacing the rear part of the vehicle with the front part or the side part.
(2) If necessary, it is also possible to provide the vehicle intrusion prevention device according to the present embodiment on the base body 10 itself of the vehicle body without providing the base plate 14.
(3) The configuration in which the upper thought point and the lower thought point in the present embodiment are provided is described as one embodiment, and compared to the configuration in which the first connection member and the second connection member are bent upward, It should be appreciated that this is a secondary preferred configuration.

DESCRIPTION OF SYMBOLS 1 ... 1st rotating shaft 2 ... 2nd rotating shaft 3 ... 3rd rotating shaft 4 ... 4th rotating shaft 5 ... 5th rotating shaft 6 ... 6th rotating shaft 8 ... Vehicle 9 ... The 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 ... Engaging 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 overhang shaft (shaft body)
35 ... first connecting member side locking part 36 ... second connecting member side locking part θ ... angle formed by two connecting members via the fifth rotation shaft φ ... angle formed by the second connecting member with respect to the horizontal line

Claims (19)

A first pivot shaft (1) provided on the rear side of the vehicle (8) in the front-rear direction (9) and provided in the base portion (10) at the rear of the vehicle (8), and the base portion (10) A second rotation shaft (2) provided in an intermediate region in the front-rear direction (9), and a third rotation shaft (3) provided in a front region in the front-rear direction (9) of the base portion (10). ,
A bumper mounting member (30) rotatably supported on the first rotation 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 first rotating shaft (1) and the mounting position of the bumper (31);
One end side (11a) is rotatably supported by the fourth rotation shaft (4), and the other end side (11b) opposite to the fourth rotation shaft (4) is provided. A first connecting member (11) rotatably supported by five rotating shafts (5);
A base end side (12a) is rotatably supported by the second rotation shaft (2), and the other end side (12b) is 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 telescopic member (13b) is rotated by the sixth rotation of the second connecting member (12). A telescopic device (13) such as a hydraulic cylinder rotatably supported on a shaft (6),
The first connecting member (11) and the second connecting member (12) are extended by projecting the telescopic member (13b) of the telescopic device (13) to the rear side in the longitudinal direction (9) of the vehicle. The bumper protruding position (15) where the bumper function can be demonstrated,
The first connecting member (11) and the second connecting member (12) are extended by pulling the expansion / contraction member (13b) of the expansion / contraction device (13) to the front side in the front-rear direction (9) of the vehicle (8). Compared to the above-described state, the vehicle has been configured to be folded upward at the position of the fifth rotation shaft (5) and to be positioned at the bumper retracting position (16) on the front side. Prevention device. 2. The vehicular intrusion prevention device according to claim 1, wherein an impact force of the bumper (31) is transmitted through the bumper mounting member (30), the first connecting member (11), and the second connecting member (12). A vehicular intrusion prevention device configured to be received by the second rotation shaft (2). 3. The vehicular intrusion prevention device according to claim 2, wherein the second rotation shaft (2) includes a shaft body that spans the left and right base portions (10). 4. The vehicular intrusion prevention device according to claim 1, wherein the first rotation shaft (1) is compared with the second rotation shaft (2). The inrush prevention apparatus for vehicles currently set to the high position in the up-down direction (17). 5. The vehicular intrusion prevention device according to claim 1, wherein the first rotation shaft (1) is closer to the vehicle (8) than the third rotation shaft (3). The vehicle entry prevention device set at a high position in the vertical direction (17). 6. The vehicular intrusion prevention device according to claim 4, wherein the third rotation shaft (3) is the same in the vertical direction (17) as the second rotation shaft (2). A vehicular intrusion prevention device that is set at a height position or a position higher than the second rotation shaft (2). The inrush preventing device for a vehicle according to any one of claims 1 to 6, wherein the first connecting member (11) and the second connecting member (12) are locked at a position below the horizontal line (32). Thus, the vehicular intrusion prevention device in which the first connecting member (11) and the second connecting member (12) are provided with lock portions (35, 36). The inrush prevention device for a vehicle according to any one of claims 1 to 7, wherein the first connecting member (11) and the second connecting member (12) when in the bumper protruding position (15). The angle (θ) formed by the two connecting members (11, 12) via the fifth pivot shaft (5) is set to an angle of θ <180 ° so that the angle is beyond the lower thought point. Vehicle entry prevention device. 9. The vehicular intrusion prevention device according to claim 1, wherein the first connecting member and the second connecting member are at the bumper protruding position. The vehicle entry prevention device is set such that the fifth rotation shaft (5) supported by the vehicle is positioned below the horizontal line (32). 10. The vehicular intrusion prevention device according to claim 1, wherein, in the bumper retracting position (16), the second connecting member (12) is interposed via the first connecting member (11). The force for rotating the bumper (31) is set to a position beyond the upper thought point of the link for lowering the bumper (31) with respect to the force for lowering the bumper (31) that rotates the bumper. Thus, the vehicular intrusion prevention device is set so that the bumper (31) is not greatly lowered by the force of pulling down the bumper (31). 11. The vehicular intrusion prevention device according to claim 10, wherein the first connecting member (11) and the second connecting member are arranged so as to exceed the upper thought point with respect to various forces for pulling down the bumper (31). (12) A vehicle intrusion prevention device in which the position and length of the fifth rotation shaft (5) are set. 12. The vehicular intrusion prevention device according to claim 1, wherein, in the bumper retracting position (16), the second connecting member (12) is interposed via the first connecting member (11). In contrast to the force that pulls down the bumper (31) that rotates the bumper (31), the force that rotates the bumper (31) is related to the second line (32) so that the second rotation shaft (2) is rotated. A vehicle intrusion prevention device in which the angle (φ) formed by the connecting member (12) is set to φ> 90 °. The vehicle entry prevention device according to any one of claims 1 to 12, wherein the third rotation shaft (3) for the telescopic device (13) can be manually rotated. A vehicle intrusion prevention device provided with a power transmission canceling means (28) for canceling the power transmission of the telescopic device (13) and the drive source (19). 14. The vehicular intrusion prevention device according to claim 1, wherein the bumper mounting member (30), the first connecting member (11), and the second connecting member (12) extend. A vehicular intrusion prevention device having a manual release tool (21) that can be moved closer to the retracted position of the bumper (31) from the raised state. 15. The vehicular intrusion prevention device according to claim 14, wherein the release tool (21) has an engaging portion (21a) that enables pivoting of a required portion of the link mechanism using the lever principle. A vehicle rush prevention device. 16. The vehicle entry prevention device according to any one of claims 1 to 15, wherein a spherical bearing having a spherical surface is adopted as a bearing of the first rotation shaft (1). The intrusion prevention device for a vehicle according to any one of claims 1 to 16, wherein not only the first rotation shaft (1) but also the second rotation shaft (2), the first A vehicle intrusion prevention device employing a spherical bearing on at least one of the three rotation shafts (3). The vehicle entry prevention device according to any one of claims 1 to 17, wherein the vehicle entry has a portable communication device (24) for realizing on / off of driving of the telescopic device (13). Prevention device. The intrusion prevention device for a vehicle according to any one of claims 1 to 18, wherein the notification device emits a different sound corresponding to an extending operation and a retracting operation of the expansion member (13b) of the expansion device (13). (26) The inrush prevention apparatus for vehicles provided.

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