JP2551709B2 - Rear bum bar device in a vehicle whose body leans backward - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rear bum bar device for a carrier vehicle in which a vehicle body leans backward.

[0002]

2. Description of the Related Art This type of transport vehicle tilts the vehicle body to the rear side and overhangs the cargo bed, and uses a walk board of about 2 m as a road board to drive various industrial machines. The winch makes it possible to load and unload safely.

By the way, the rear bumper of a transport vehicle is fixed to the rear end of the chassis frame, and the safety standard for the ground height of the rear bumper is planned to be revised. The current security standard specifies 700 mm or less, but the new security standard has been revised to 550 mm or less.If the rear bumper is an existing fixed type and the ground height is 550 mm, which is the new standard, The following problems occur.

That is, when the amendment is carried out, the rear bumper comes closer to the ground, so that the inclination angle of the platform becomes slightly looser, while the inclination angle of the step board becomes slightly tighter, and as a result, the platform and the walking are stepped. The difference in the angle of inclination between the board and the plate is several degrees larger than that of the current security standards.

As a result, when moving from the step board to the platform or from the platform to the step board during loading and unloading, the difference in inclination angle between the two is larger than that of the conventional one, so that the pitching in the front-rear direction is large. As well as making the driver feel a great deal of anxiety, the heavier the weight of the industrial machine, the more the impact of the pitching is applied to the entire vehicle body and further to the ground, which makes the loading and unloading work very dangerous. And, the features and advantages of this kind of carrier are lost, and it will cause a great loss to the industrial world.

[0006]

The problem to be solved is that the ground height of the rear bumper conforms to the new safety standards,
There is no difference in the inclination angle between the loading platform and the step board as before, and various industrial machines can be loaded and unloaded safely as before.On top of that, the rear bamba is fixed at the appropriate rear-end collision protection position in a timely manner. It is an object of the present invention to provide a rear bum bar device in a carrier vehicle in which a vehicle body that can be locked with strength is tilted backward.

[0007]

Means for Solving the Problems The means taken by the present invention to achieve the above-mentioned object is to provide a body stabilizing / floating jack on the left and right of the front part of the vehicle body, and to provide a pair of left and right steps at the rear end of the cargo bed. In a transport vehicle that is equipped with a plate and whose body can be tilted backward with the rear wheel as a fulcrum by the operation of the jack, the rear bumper
The left and right supports that extend to the front of the bumper part from the rear edge of the decorative plate at the trailing edge of the loading platform at the rear collision protection position, and extend forward from the bumper part to the rear of the loading platform through directly below the split groove on the lower edge of the decorative plate. The rear bumper is composed of an arm, and the front and rear support arms of the rear bumper are pivotally supported on the rear of the chassis frame with respect to the chassis frame, and the bumper part swings between the rear impact protection position and the upper standby position. The rear bumper is formed movably and has a stopper element capable of supporting the rear bumper at the rear impact protection position and restricting downward swinging from the rear impact protection position, and the rear bumper at the rear impact protection position. , A pin provided on the holding piece is inserted through the engaging hole of the engaging piece projecting on the beam rod between the left and right supporting arms and the guide hole of the retaining piece protruding on the fixed shaft. Can be locked and Characterized in that the disconnect vent has a lock releasable locking element.

A vehicle body stabilizing / floating jack is arranged on the left and right of the front part of the vehicle body, and a pair of left and right step plates is provided at the rear end of the loading platform. The operation of the jack allows the vehicle body to be tilted backward with the rear wheel as a fulcrum. In a car, the rear bumper consists of a bumper part located at the rear collision protection position on the lower rear side of the decorative plate at the trailing edge of the loading platform, and extends forward from the bumper part, and directly below the split groove at the lower edge of the decorative plate, and under the rear portion of the loading platform. It consists of both left and right support arms reaching up to the rear, and this rear bamber pivots the front part of both left and right support arms to the rear part of the chassis frame with respect to the chassis frame, and the bumper part is located above the rear impact protection position and above. In addition to having a stopper element which is swingably formed between the standby position and the rear bumper and is supported by the rear impact protection position to regulate downward swing from the rear impact protection position, Liya In the rear impact protection position, the lock that can be locked by inserting the pin interlocking with the cylinder installed on the fixed shaft into the locking holes of the left and right support arms and unlocking by removing the pin It is characterized by having elements.

Further, the present invention is characterized in that it has a switch for interlocking with the lock element to switch on and off, and this switch is short-circuited with the indicator in the cab. Examples of this indicator include a pilot lamp and a buzzer.

The locking element in the present invention is a manual type mechanical element, an automatic type mechanical element, or the like,
In the case of the automatic type, you can freely link it with the body stabilization / floating jack. The pair of left and right step plates are detachable from the hooks at the rear end of the loading platform, and are integrally pivotally fixed to a rotary shaft that is rotated by the driving force of the cylinder at the rear end of the loading platform. Automatically undulating motion, automatically undulating by being mounted integrally on a rotary shaft that rotates in response to the driving force of the cylinder at the rear end of the loading platform so that it can slide horizontally. On the other hand, one that is pushed and slidable to the left and right, one that is also automated by the driving force of the cylinder for this left and right slide (see, for example, Japanese Utility Model Publication No. 63-42041), and The present invention is not limited, including a mode in which it can be extended rearward from below and can be slid to the left and right in this extended state (see, for example, Japanese Patent Application No. 62-198592) and other known aspects.

[0011]

When the vehicle is running or at a stop, the rear bumper is in the rear-end collision protection position, extending over the retaining hole of the retaining piece in the beam rod between the left and right support arms and the guide hole in the retaining piece of the fixed shaft. Since the pin provided is inserted, it is locked and fixed in the same position.

At the time of loading and unloading, the rear bumper comes into contact with the ground when the vehicle body is tilted to the rear halfway. As the vehicle body further tilts backward, the rear bumper swings with respect to the vehicle body while touching the ground, and moves from the rear-end collision protection position to the standby position side. Then, the rear bum bar swings to the standby position side until the vehicle body further tilts backward and the difference in the inclination angle between the luggage carrier and the walk plate becomes approximately the same as the conventional one, and the rearward leaning operation of the vehicle body is not hindered. .

At the end of loading and unloading, as the vehicle body returns and moves, the rear bambar swings downward from the standby position due to its own weight and returns to the rear impact protection position supported by the stopper, It is supported in the same position and locked by a locking element. The lock can be released by removing this pin.

As a result, the rear bumper moves from the rear-end collision protection position to the standby position when the vehicle body is tilted backward, is returned to the rear-end collision protection position from the standby position when the vehicle body is not rear-tilted, and is locked from the rear-end collision protection position. It does not swing to the position side by any chance, and it has the same level of safety as the conventional fixed type, and the rear bumper has rear collision protection that is the height above the ground level of the new safety standard when driving or stopping. In position,
In preparation for a rear-end collision accident, and when loading / unloading, the rear bambar stands by at the standby position, and the vehicle body leans backward at an inclination angle where the platform and the step board are in a zero angle and is loaded / unloaded. Prepare an advantageous position. Further, the locked state of the rear bumper can be confirmed by an indicator in the driver's cab through a switch interlocking with the lock element.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Each embodiment of a carrier incorporating the rear bumper device of the present invention will be described in detail below with reference to the drawings.

In the transport vehicle of the first embodiment illustrated in FIGS. 1 to 7, vehicle body stabilizing / floating jacks 2 are arranged on the left and right sides of the front portion of the vehicle body 1, and both left and right hooks 4 at the rear end of the loading platform 3 are provided. Further, a pair of left and right walking boards 5 are detachably provided, and the vehicle body 1 can be tilted backward with the rear wheel 6 as a fulcrum by the operation of the jack 2.

The rear ban bar 7 behind the vehicle body 1
Is a bumper portion 9 located at the rear-end rear-side collision protection position a of the decorative plate 8 at the trailing edge of the loading platform 3, and extends forward from the bumper portion 9 and directly below the split groove 10 at the lower edge of the decorative sheet 8 and then the loading platform. 3 Rear left and right support arms 11 reaching to the lower rear part. This rear bambar 7 pivots the front parts of the left and right support arms 11 to a fixed shaft 14 installed on the left and right brackets 13 at the rear of the chassis frame 12. The bumper portion 9 is formed so as to be swingable between the lower rear impact protection position a and the upper standby position b with the fixed shaft 14 as a fulcrum.

A first stopper 15 is provided at the front end of both the left and right support arms 11 so as to freely abut against the lower surface of the chassis frame 12, and a second stopper 16 is provided at the left and right ends of the bumper portion 9 below the decorative plate 8. The rear bumper 7 is projectingly provided so as to be able to come into contact with the upper surface of the grounding foot 17 at the edge, and the rear bumper 7 is supported at the rear impact protection position a by the first and second stoppers 15 and 16, and the rear impact protection position a is also supported. The swing from a to the lower side is restricted so as not to fall.

A coil spring 18 is wound around the left and right shafts of the fixed shaft 14, and one end of each coil spring 18 is fixed to the shaft, while the other end of the spring is locked to the left and right support arms 11. In addition, the rear ban bar 7 can be biased from the standby position b to the rear impact protection position a by the spring force.

Further, a beam rod 19 is installed on both the left and right support arms 11 in parallel with the fixed shaft 14. The beam rod 19 has a locking piece 20 projecting toward the fixed shaft 14 side at the center thereof. are doing. The locking piece 20 is interposed between the pair of left and right holding pieces 21 in the central portion of the fixed shaft 14, and the pin 23 in the cylindrical holding portion 22 protruding from the one holding piece 21 is The rear ban bar 7 is lockable at the rear impact protection position a by being inserted through the guide holes 24 of both holding pieces 21 and the locking holes 25 of the locking pieces 20.

The pin 23 is pushed by the spring 26 so that the guide hole
It penetrates over 24 and the locking hole 25. An operating lever 28 on the side of the vehicle body 1 is linked to the pin 23 via the control cable 27. By operating the operating lever 28, the pin 23 is disengaged from the locking hole 25, and the rear ban bar 7 Is locked at the rear-end collision protection position a, and the lock is released so that it can swing to the standby position b.

A switch 29 is arranged beside the pin 23,
The switch 29 detects that the pin 23 is disengaged from the locking hole 25 and turns on the pilot lamp 31 in the cab 30. Also, the switch 29 has the pin 23 with the locking hole 25.
The pilot lamp 31 is turned off by detecting that the pilot lamp 31 is locked.

As a result, at the time of running or stopping, the rear bambar 7 is forcibly pushed down by its own weight and further by the coil spring 18, so that the first stopper 15 is placed on the shear sea frame 12 and the second stopper 16 is placed on the ground foot 17. They settle at the rear-end collision protection position a, which is the ground height of the new safety standard, where they were received and supported. Moreover, the rear bumper 7 has a pin 23.
Is pushed by the spring 26 and inserted through the guide hole 24 and the locking hole 25, and is locked and fixed at the rear impact protection position a, so that the rear ban bar 7 should be moved from the rear impact protection position a to the standby position b side by any chance. It does not swing and has the same level of safety as the conventional fixed type, and can be prepared for a rear-end collision accident while the vehicle is running or stopped.

At the time of loading and unloading, the rear lever 7 is unlocked by the operating lever 28, and the rear lever 7 is swingably opened to the standby position as the vehicle body 1 leans backward. The bumper 7 swings to the standby position b side following the rearward inclination angle of the vehicle body 1 and does not prevent the rearward inclination operation of the vehicle body 1. Therefore, the vehicle body 1 is tilted to the desired inclination angle to the rear side without being affected by the presence of the rear bumper 7, and there is not much difference in the inclination angles of the loading platform 3 and the step board 5, so that the vehicle body 1 can be safely loaded and unloaded. It can be loaded and unloaded.

Further, since the rear ban bar 7 is forcibly pushed down to the side of the rear impact protection position a by the spring force of the coil spring 18, it is possible to move from the standby position b to the rear impact protection position a.
The return operation to can be done smoothly.

Further, the rear bumper 7 is located at the rear impact protection position a.
The fact that the pilot lamp 31 is turned off can be confirmed in the cab 30 by directly looking at the fact that the pilot lamp 31 is locked.

If the carrier is with a crane,
Body stability / floating jack 2 is lowered to land on the body 1
Since the locked state of the rear bumper 7 at the rear-end collision protection position a can be firmly maintained even during the crane work in a stable state, it is possible to prepare for a rear-end collision accident even during the crane work.

The carrier of the second embodiment illustrated in FIGS. 8 to 11 is the same as the first embodiment except that the rear spring bar 7 is not provided with a coil spring 18 for urging the rear bumper 7 toward the rear impact protection position a. Since the configuration is basically the same as that of the embodiment, the description of the common configuration will be omitted, and the different configuration will be described.

The rear bum bar 7 has its left and right support arms.
11 Front part, chassis frame 12 Rear left and right brackets
It is pivotally attached to a fixed shaft 14 erected on 13 and the bumper portion 9 is formed so as to be swingable between the lower rear impact protection position a and the upper standby position b with the fixed shaft 14 as a fulcrum. In addition, the weight of the vehicle is returned from the standby position b to the rear-end collision protection position a so as to settle down.

As a result, at the time of running or stopping, the rear bambar 7 is lowered by its own weight, the first stopper 15 is on the shear sea frame 12, the second stopper 16 is on the grounding foot 17,
They settle at the rear-end collision protection position a, which is the ground height of the new safety standard, where they were received and supported. Moreover, since the rear bumper 7 is locked and fixed at the rear impact protection position a by the pin 23, the rear bumper 7 moves from the rear impact protection position a to the standby position b.
It does not swing to the side, has the same level of safety as the conventional fixed type, and can be prepared for a rear-end collision accident while the vehicle is running or stopped.

At the time of loading and unloading, the rear lever 7 is unlocked by the operating lever 28, and the rear lever 7 is swingably opened to the standby position as the vehicle body 1 leans backward. The bumper 7 swings to the standby position b side following the rearward inclination angle of the vehicle body 1 and does not prevent the rearward inclination operation of the vehicle body 1. Therefore, the vehicle body 1 is tilted to the desired inclination angle to the rear side without being affected by the presence of the rear bumper 7, and there is not much difference in the inclination angles of the loading platform 3 and the step board 5, so that the vehicle body 1 can be safely loaded and unloaded. It can be loaded and unloaded.

Further, the rear bumper 7 is located at the rear impact protection position a.
The fact that the pilot lamp is turned off can be confirmed directly in the cab by confirming that it is locked.

If the carrier is equipped with a crane,
Body stability / floating jack 2 is lowered to land on the body 1
Since the locked state of the rear bumper 7 at the rear-end collision protection position a can be firmly maintained even during the crane work in a stable state, it is possible to prepare for a rear-end collision accident even during the crane work.

In the locking element illustrated in FIG. 12, the pin 23 is formed by the cylinder rod 38 of the cylinder 37.
The cylinder rod 38 can be engaged with and disengaged from the locking hole 25 in accordance with the operation of 37, so that the locking and unlocking of the rear ban bar 7 can be remotely controlled in the cab 30 or the side of the vehicle body 1.

Further, the cylinder 37 may be constructed so as to be interlocked with the vehicle body stabilizing / floating jack 2. FIG. 13 shows an example thereof, in which the left and right cylinders 37 are connected to an air tank 40 via a check valve 39, and the check valve 39 is a limit provided on the side of an operation lever 41 that raises and lowers the vehicle body stabilization / lifting jack 2. Shorted to switch 42.

When the vehicle body stabilizing / floating jack 2 is raised and when the vehicle is stopped, the operating lever 41 is in the neutral position, the limit switch 42 is in the OFF state, and the left and right cylinder rods 38 are respectively in the cylinder 37.
The pin 23 at the end of the cylinder rod 38 moves forward in response to the spring force of a spring (not shown) built in the rear armature of the rear bumper 7 at the rear impact protection position a.
The rear bum bar 7 is locked in the rear impact protection position a by being locked in the locking holes 25 of 11 respectively.

When the vehicle body stability / levitation jack 2 is raised and lowered, the limit switch 42 detects the movement of the operation lever 41 when the vehicle body 1 leans backward and returns to the check valve 39, and the check valve 39 opens. , The left and right cylinder rods 38 retreat against the spring force of the springs, the pins 23 at the ends of the cylinder rods 38 come off from the locking holes 25, respectively, and the rear ban bar 7 is unlocked from the rear impact protection position. .

When the rearward leaning of the vehicle body 1 is completed, the operating lever 41 returns to the neutral position and the limit switch 42 returns to the OFF state, and the left and right cylinder rods 38 receive the spring force of the springs to move forward to the pin 23. Lightly hits the plate surface beside the locking hole 25 in the support arm 11 of the rear bambar 7 at the standby position b to prepare for locking in the locking hole 25.

At the end of the return of the vehicle body 1, the operating lever 41 returns to the neutral position and the limit switch 42 returns to the OFF state, respectively, and the left and right pins 23 move forward due to the spring force of the springs, and the standby position b. To the rear impact protection position a, the rear bumper 7 is locked in the rear support holes 11 of the support arm 11 of the rear bumper 7 which is double-moved.

As a result, the rear bumper 7 can be locked at the rear impact protection position a in conjunction with the rearward tilting operation and the return operation of the vehicle body 1, and can be unlocked at the rear impact protection position a and swingable to the standby position b. Since the vehicle can be locked at the rear-end collision protection position a at the time of swinging from the standby position b to the rear-end collision protection position a, the rear-ban bar 7 rear-end collision protection position of the rear ban bar 7 can be provided unless the vehicle body stabilizing / floating jack 2 is lifted and lowered. It is possible to firmly hold the locked state at a with substantially the same strength as the fixed type.

Even when the transport vehicle is equipped with a crane, the rear bumper 7 can maintain the locked state at the rear impact protection position a during the crane operation, so that a rear impact accident can be prepared even during the crane operation. it can.

Although the pin 23 is pushed by the spring and abuts against the plate surface of the locking piece 20 in the rear ban bar 7 at the standby position b, the spring force of the spring is such that the pin 23 is lightly pressed. There is no need to worry about damage to the device, including 20.

The above embodiments are merely examples of the present invention. For example, the step board may be automated so as to receive the driving force of the cylinder and move up and down and slide left and right.

[0044]

EFFECT OF THE INVENTION A. According to claim 1, in the normal state, the rear bumper is located at the rear-end collision protection position which is the ground height of the new safety standard, and at the rear-end collision protection position, the engagement of the locking piece on the beam rod between the left and right support arms. Since the pin provided on the holding piece is inserted and locked between the stop hole and the guide hole in the holding piece of the fixed shaft, the pin is fixed with almost the same strength as the conventional fixed type, and its rear impact impact It has the same strength as that of the conventional one fixed to the rear end of the chassis frame, and can satisfy the rear impact impact strength required for the rear bumper, which prevents rear impact accidents while the vehicle is running or stopped. Can be prepared. When loading and unloading, the rear bumper can automatically swing to the standby position when the vehicle leans backward, so the vehicle leans toward the desired tilt angle without being affected by the presence of the rear bumper. Various industrial machines can be safely loaded and unloaded in a good loading and unloading state where there is not much difference in the tilt angle between the loading platform and the step board.

B. According to claim 2, in the normal state, the rear bumper is in the rear-end collision protection position which is the ground height of the new safety standard, and in the rear-end collision protection position, the pin on the left and right support arms of the fixed shaft is linked with the cylinder. Since it is inserted and locked in the locking hole of, it is fixed to almost the same strength as the conventional fixed type, and its rear impact impact strength is similar to that of the conventional one fixed to the rear end of the chassis frame. It has strength and can satisfy the rear impact impact strength required for the rear bumper, and can be prepared for a rear impact accident while the vehicle is running or stopped. When loading and unloading, the rear bumper can automatically swing to the standby position when the vehicle leans backward, so the vehicle leans toward the desired tilt angle without being affected by the presence of the rear bumper. Various industrial machines can be safely loaded and unloaded in a good loading and unloading state where there is not much difference in the tilt angle between the loading platform and the step board.

C. According to the third aspect, the locked state of the rear bumper can be confirmed by the indicator in the driver's cab through the switch interlocked with the lock element, and the inconvenience of forgetting to lock can be prevented.

[Brief description of drawings]

FIG. 1 is a schematic view illustrating a first embodiment of a carrier having a rear bumper device according to the present invention.

FIG. 2 is an enlarged plan view of a main part with a part cut away.

FIG. 3 is an enlarged rear view of a main part with a part cut away.

FIG. 4 is an enlarged vertical sectional view of a main part.

FIG. 5 is a partial enlarged cross-sectional view of the locking element.

FIG. 6 is an enlarged vertical cross-sectional view of a main part showing a loading / unloading state.

FIG. 7 is a partially enlarged cross-sectional view of the lock element that is unlocked before loading and unloading.

FIG. 8 is a partially cutaway enlarged plan view of a main part illustrating a second embodiment of a carrier having a rear bumper device of the present invention.

FIG. 9 is an enlarged rear view of a main part with a part cut away.

FIG. 10 is an enlarged vertical sectional view of a main part.

FIG. 11 is an enlarged vertical cross-sectional view of a main part showing a loading / unloading state.

FIG. 12 is a partial enlarged plan view showing another embodiment of the locking element with a part cut away.

FIG. 13 is a partially enlarged perspective view showing an outline of an embodiment in which a vehicle body stabilizing / floating jack and a locking element are interlocked with each other.

[Explanation of symbols]

1 body 2 body stability
Floating jack 3 Luggage platform 4 Hook 5 Walking plate 6 Rear wheel 7 Rear bumper 8 Decorative plate 9 Bar bumper part of rear bumper 10 Split groove of decorative plate 11 Rear bumper support arm 12 Chassis frame 13 Bracket 14 Fixed shaft 15 First stopper (stopper) 16) Second stopper (stopper element) 17 Grounding foot 18 Coil spring 19 Beam rod 20 Locking piece 21 Holding piece 22 Holding part 23 Pin (locking element) 24 Guide hole of holding piece 25 Locking hole of locking piece 26 Spring 27 Control cable 28 Pin operating lever 29 Switch 30 Operator's cab 31 Pilot lamp (indicator) 32 Rotating shaft 33 Support arm elongated hole 34 Suspension rod (stopper element) 35 Rotating shaft 36 Stopper (stopper element) 37 Cylinder ( Lock element) 38 Cylinder rod 39 Check valve 40 Air tank 41 Stable / floating body Jack operating lever 42 Limit switch 43 Spring

Claims (3)

(57) [Claims] 1. A vehicle body stabilizing / floating jack is arranged on the left and right of the front part of the vehicle body, and a pair of left and right step plates are provided at the rear end of the loading platform.
In a transport vehicle in which the vehicle body can be tilted backward with the rear wheel as a fulcrum due to the operation of the jack, the rear bumper has a bumper portion located at the rear collision lower protection position on the rear lower side of the decorative plate on the trailing edge of the loading platform,
It consists of left and right support arms that extend forward from the same barbar part, and directly below the split groove at the bottom edge of the decorative plate and reach the rear part under the cargo bed. The front part is pivotally supported on the rear part of the chassis frame so that the bumper part is swingably formed between the rear impact protection position and the upper standby position, and the rear bumper is supported at the rear impact protection position. The rear bumper has a stopper element capable of restricting downward swinging from the rear-end collision protection position, and the rear bumper is disposed in the rear-end collision protection position, and a locking hole of a locking piece projecting on the beam rod between the left and right support arms. And a lock element that can be locked by inserting a pin provided on the holding piece over the guide hole of the holding piece protruding from the fixed shaft and unlocking by removing the pin. Characterized by Rear bumper device in the truck to be tilted backward the vehicle body to be. 2. A vehicle body stabilizing / floating jack is arranged on the left and right of the front part of the vehicle body, and a pair of left and right step plates are provided on the rear end of the loading platform,
In a transport vehicle in which the vehicle body can be tilted backward with the rear wheel as a fulcrum due to the operation of the jack, the rear bumper has a bumper portion located at the rear collision lower protection position on the rear lower side of the decorative plate on the trailing edge of the loading platform,
It consists of left and right support arms that extend forward from the same barbar part, and directly below the split groove at the bottom edge of the decorative plate and reach the rear part under the cargo bed. The front part is pivotally supported on the rear part of the chassis frame so that the bumper part is swingably formed between the rear impact protection position and the upper standby position, and the rear bumper is supported at the rear impact protection position. The rear bumper has a stopper element capable of restricting downward swing from the rear-end collision protection position, and the rear bumper is supported at the rear-end collision protection position by supporting a pin interlocking with a cylinder provided on the fixed shaft on both the left and right sides. A rear bum bar in a transport vehicle in which a vehicle body leans backward, having a lock element that can be inserted into a locking hole of an arm and locked and that can be unlocked by removing a pin. Location. 3. A vehicle body tilting backward according to claim 1 or 2, further comprising a switch for interlocking with the lock element, the switch being short-circuited with an indicator in a driver's cab. Rear bum bar device in a carrier.