JPH05147483A - Rear bumper device for transport vehicle whose car body can be tilted toward rear - Google Patents

Abstract

PURPOSE:To set the grounding height of a rear bumper so as to be fitted to a new safety standard and safely carry out the loading/unloading work of a variety of industrial machines, by automatically swinging the rear bumper to a waiting position, accompanied with the rearward tilt of the car body, in the loading/unloading work. CONSTITUTION:As for a rear bumper 7, the front parts of the left and right supporting arms 11 are pivotally installed on a fixed shaft 14 laid on the left and right brackets 13 in the rear part of a chassis frame 12, and a bumper part 9 is formed so as to be swingable between a rear-end collision protecting position (a) and a waiting position (b) at the upper rank, having the fixed shaft 14 as fulcrum. At the front edges of the left and right supporting arms 11, the first stopper 15 is installed so as to contact the undersurface of the chassis frame 12, and at the left and right edge parts of the bumper part 9, the second stopper 16 is installed so as to contact the upper surface of the grounded leg 17 at the lower edge of a decoration plate 8, and the rear bumper 7 is received at the rear-end collision protecting position (a) by the stoppers 15 and 16, and the downward swing form the rear-end collision protecting position (a) is regulated.

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 walking board of about 2 m as a road board to drive various industrial machines. The winch allows for safe loading and unloading.

By the way, the rear bumper in a carrier 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 is 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 platform are walked. The difference in the angle of inclination with the plate is several degrees greater than that of the current security standards.

As a result, the pitch angle in the front-rear direction is large because the difference in the inclination angle between the footboard and the platform or the footboard when loading and unloading is greater than that of the conventional one. Not only does the driver feel a great deal of anxiety, but 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 if the ground height of the rear bumper of the type fixed to the rear end of the chassis frame is made to comply with the new safety standards, the loading platform and the walking board are It is unavoidable that the difference in the inclination angle becomes large by several degrees, and the loading and unloading work of various industrial machines cannot be performed safely as in the past.

[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 the body can be tilted backward with the rear wheel as a fulcrum by the operation of the jack, the rear bumper
Both the left and right supports that extend forward from the bumper part located at the rear collision lower protection position of the decorative plate on the trailing edge of the loading platform and extend forward from the bumper part to the rear of the loading platform through directly under 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 at 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. It is characterized in that it has a stopper element which is formed so as to be movable, and which supports the rear bumper at the rear-end collision protection position and can regulate downward swing from the rear-end collision protection position.

Further, the present invention is characterized in that it has a locking element capable of fixing the rear bumper at the rear impact protection position. This locking element is a manual type mechanical element,
It is an automatic type mechanical element, etc. In the case of an automatic type, it can be freely linked with the body stability and levitation jack.

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

The pair of left and right step plates according to the present invention are detachable from the hooks at the rear end of the loading platform.
In a mode in which it is integrally pivotally fixed to a rotary shaft that rotates by receiving the driving force of the cylinder at the rear end of the loading platform and automatically undulates, receiving the driving force of the cylinder at the rear end of the loading platform. It is mounted integrally on a rotating shaft that is rotatable and slidable left and right, and automatically moves up and down while being pushed and slidable left and right. One that is automated by the driving force of the cylinder (see, for example, Japanese Utility Model Publication No. 63-42041), and one that can be extended rearward from under the platform and can be slid to the left and right in this extended state (for example, , Japanese Patent Application No. 62-198592), and other known embodiments, without limitation.

[0011]

[Function] When the vehicle is running or stopped, the rear bumper is supported by the stopper and settles in the rear-end collision protection position by its own weight to prepare for an unexpected rear-end collision.

At the time of loading and unloading, the rear bumper comes into contact with the ground when the vehicle body is inclined to the rear halfway. Then, as the vehicle body further tilts backward, the rear bumper swings with respect to the vehicle body while keeping contact with 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 and does not prevent the rearward leaning operation of the vehicle body until the vehicle body further leans backward and the difference in tilt angle between the luggage carrier and the walk plate becomes approximately the same as the conventional one. ..

At the end of loading and unloading, as the vehicle body returns and moves, the rear bumper swings downward due to its own weight, returns from the standby position to the rear-end collision protection position, and is supported at the same position. It

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, and returns from the standby position to the rear-end collision protection position when the vehicle body is not tilted rearward.
The rear bumper is in the rear-end collision protection position, which is the ground height of the new safety standard, to prepare for a rear-end collision when the vehicle is running or stopped, and when unloading,
The rear bumper stands by at the standby position, and the vehicle body leans backward at an inclination angle where the platform and the step board are connected to each other at an angle of zero, so that the body is ready for loading and unloading.

Also, since the rear bumper can be fixed to the rear impact protection position by the locking element, the rear bumper does not swing from the rear impact protection position to the standby position by any chance, and is equivalent to the conventional fixed type. Have the safety of.

Further, the lock state of the rear bumper can be confirmed by an indicator in the driver's cab through a switch interlocking with the lock element.

[0017]

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 of the front part of the vehicle body 1, and both left and right hooks 4 at the rear end of the loading platform 3 are provided. A pair of left and right step plates 5 are detachably provided, and the body 1 can be tilted rearward 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 extending to the lower rear part, and this rear bambar 7 pivots the front parts of the left and right support arms 11 to a fixed shaft 14 installed on left and right brackets 13 at the rear of the chassis frame 12. The bumper portion 9 is swingably formed 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 ban bar 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 supported. The swing from a to the lower side is restricted so as not to fall.

Coil springs 18 are 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 ends of the springs are 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 erected on both the left and right support arms 11 in parallel with the fixed shaft 14, and the beam rod 19 has a locking piece 20 projecting toward the fixed shaft 14 side at the center thereof. is doing. Further, 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 projecting 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 and is guided into 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 is unlocked 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. Further, the switch 23 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, and the first stopper 15 is placed on the shear frame 12, the second stopper 16 is placed on the grounding foot 17, Each of them is settled at the rear-end collision protection position a, which is the ground height of the new security standard. Moreover, the rear bumper 7 has a pin 23.
Is pushed by the spring 26, penetrates 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. Also, 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 locked state of the rear ban bar 7 is released by the operation lever 28, and the rear ban bar 7 is swingably opened to the standby position when the rear body of the vehicle body 1 is tilted rearward. The bumper 7 oscillates 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 no significant difference in the inclination angles of the loading platform 3 and the step board 5, so that the vehicle is safe. 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, the rear bumper 7 is moved from the standby position b to the rear impact protection position a.
Can be smoothly returned to.

In addition, the rear bumper 7 has the rear collision protection position a.
It can be confirmed that the pilot lamp 31 is turned off in the driver's cab 30 by directly looking at it.

When the carrier is equipped with a crane,
Body Stabilization / Floating jack 2 is lowered to land and
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 according to the second embodiment illustrated in FIGS. 8 to 12 is the same as the carrier according to the first embodiment except that it is not provided with a locking element and the step board is rotatably pivoted. Since the structure is basically the same as that of the embodiment, the description of the common structure will be omitted and a different structure will be described.

A pair of left and right step plates 5 are pivotally mounted on a rotary shaft 35 which is rotatable by receiving a driving force of a cylinder (not shown) at the rear end of the luggage carrier 3, and the left and right brackets 13 are mounted.
The front end of the left and right support arms 11 is axially attached to the left and right shaft ends projecting to the outside of the bracket 13 through the rotary shaft 32. Further, one end of the coil spring 18 wound around the left and right shaft ends is fixed to the bracket 13, while the other end of the spring 18 is locked to both the left and right support arms 11, so that the rear ban bar 7 is spring-loaded. Standby position b
Is capable of being urged to the rear-end collision protection position a.

Then, the long hole 33 in the center of the left and right support arms 11
A suspension rod 34 hanging from the chassis frame 12 is engaged with the suspension frame 34, and the support arm 11 is suspended by the suspension rod 34,
Stop the rear bumper 7 at the rear-end collision protection position a,
The downward swing from the rear-end collision protection position a can be restricted.

As a result, the rear bumper 7 is automatically located at the rear-end collision protection position a, which is the ground height of the new safety standard, so that it is possible to prepare for rear-end collision accidents while the vehicle is running or stopped. When the vehicle is loaded and unloaded, the rear bumper 7 can be automatically swung to the standby position as the vehicle body 1 leans backward. Therefore, the vehicle body 1 is not affected by the existence of the rear bumper 7 and is rearward. It can be safely loaded and unloaded in a good loading and unloading state in which it is tilted to a desired tilting angle and there is not much difference in tilting angle between the platform 3 and the step board 5.

The transport vehicle of the third embodiment illustrated in FIGS. 13 and 14 is the same as the transport vehicle of the first embodiment except that it is not provided with a locking element and the step board is rotatably pivoted.
Since the structure is basically the same as that of the embodiment, the description of the common structure will be omitted and a different structure will be described.

A pair of left and right step plates 5 are pivotally mounted on a rotary shaft 35 which is rotatable by receiving a driving force of a cylinder (not shown) at the rear end of the loading platform 3, and the left and right brackets 13 are mounted.
The rotary shaft 32 is inserted through the bracket, and the left and right support arms 11 are attached to the left and right shaft ends projecting to the outside of the bracket 13.
The front end is pivoted. In addition, one end of the coil spring 18 wound around the left and right shaft ends is fixed to the bracket 13, while the other end of the spring is locked to both the left and right support arms 11, so that the rear ban bar 7 stands by by spring force. The position b can be biased to the rear impact protection position a.

Further, stoppers 36 are provided at the left and right ends of the bumper portion 9 so as to come into contact with the upper surface of the grounding foot 17 at the lower edge of the decorative plate 8. With the stoppers 36, the rear bumper 7 is provided.
Is stopped at the rear-end collision protection position a, and the rear-end collision protection position a
The swing from the bottom to the bottom can be regulated.

As a result, the rear bumper 7 is automatically located at the rear-end collision protection position a, which is the ground height of the new safety standard, so that it is possible to prepare for a rear-end collision accident while the vehicle is running or stopped. When the vehicle is loaded and unloaded, the rear bumper 7 can be automatically swung to the standby position as the vehicle body 1 leans backward. Therefore, the vehicle body 1 is not affected by the existence of the rear bumper 7 and is rearward. It can be safely loaded and unloaded in a good loading and unloading state in which it is tilted to a desired tilting angle and there is not much difference in tilting angle between the platform 3 and the step board 5.

The transport vehicle of the fourth embodiment illustrated in FIGS. 15 to 18 is the same as the first embodiment except that the coil spring 18 for urging the rear bumper 7 toward the rear impact protection position a is not provided. Since the structure is basically the same as that of the embodiment, the description of the common structure will be omitted and a different structure will be described.

The rear bum bar 7 has its left and right support arms.
11 front and rear 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. Moreover, the weight of the vehicle is returned from the standby position b to the rear-end collision protection position a by its own weight 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 frame 12, the second stopper 16 is on the grounding foot 17,
Each of them is settled at the rear-end collision protection position a, which is the ground height of the new security standard. 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 oscillates 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 no significant difference in the inclination angles of the loading platform 3 and the step board 5, so that the vehicle is safe. It can be loaded and unloaded.

Further, the rear ban bar 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.

When the carrier is equipped with a crane,
Body Stabilization / Floating jack 2 is lowered to land and
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. 19, 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 rear ban bar 7 can be locked and unlocked remotely from the cab 30 or the side of the vehicle body 1.

The cylinder 37 may be constructed so as to be interlocked with the vehicle body stabilizing / floating jack 2. FIG. 20 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 in the cylinder 37, respectively.
The springs (not shown) built in the front of the rear bumper 7 are pushed forward to receive the spring force, and are locked in the locking holes 25 of the left and right support arms 11 in the rear bumper 7 at the rear impact protection position a. Is locked in the rear impact protection position a.

When the vehicle body stabilizing / floating jack 2 is raised and lowered, the limit switch 42 detects the movement of the operating lever 41 and informs the check valve 39 when the vehicle body 1 is tilted back and returned, and the check valve 39 is opened. , The left and right cylinder rods 38 are retracted against the spring force of the spring and the locking holes 25
The rear bambar 7 is unlocked at both the rear-end collision protection position a and the standby position.

When the rearward leaning of the vehicle body 1 is completed, the operation 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 standby position. In order to be locked in the locking hole 25, each of the support arms 11 of the rear bumper 7 of FIG.

At the end of the return of the vehicle body 1, the operation lever 41 returns to the neutral position, the limit switch 42 returns to the OFF state, and the left and right cylinder rods 38 move forward due to the spring force of the springs to the standby position. The rear bum bar 7 is locked in the rear impact protection position a by engaging with the retaining holes 25 in the support arm 11 of the rear ban bar 7 double-acted from b to the rear impact protection position a.

As a result, the rear bumper 7 can be locked at the rear-end collision 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-end collision 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, unless the vehicle body stabilizing / floating jack 2 is operated to be raised or lowered, the rear-ban bar 7 rear-end collision protection position The locked state in a can be firmly maintained.

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 cylinder rod 38 is pushed by the spring and abuts against the plate surface of the locking piece 20 of the rear ban bar 7 at the standby position b, the spring force of the spring is such that the cylinder rod 38 is only slightly pushed. There is no risk of damage to this device including the stopper 20.

Each of the above embodiments is merely an example of the present invention. For example, in the first embodiment, the lock element is not included, or the step board receives the driving force of the cylinder. It may be automated such as undulating motion and sliding to the left and right, and it is also optional that the second and third embodiments are provided with a locking element.
Further, the pin of the locking element may be directly engaged with and disengaged from the support arm so as to be locked and unlocked, which is free as long as the gist of the present invention is not changed.

[0054]

【The invention's effect】

A. According to the first aspect, in the normal state, the rear bumper is automatically in the rear-end collision protection position which is the ground height of the new safety standard, so that it is possible to prepare for rear-end collision accidents while the vehicle is running or stopped. And when unloading,
Since the rear bumper can automatically swing to the standby position when the vehicle leans backward, the vehicle leans to the desired tilt angle to the rear side without being affected by the presence of the rear bumper, and the platform and the walking board can be tilted. 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.

B. According to claim 2, since the rear bumper can be fixed to the rear impact protection position by the locking element, its rear impact impact strength is about the same as that of the conventional one fixed to the rear end of the chassis frame. After satisfying the effect of A, the rear impact impact strength required for the rear bumper can be satisfied.

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 interlocking with the lock element, and inconvenience such as forgetting to lock can be prevented.

[Brief description of drawings]

FIG. 1 is a schematic view illustrating a first embodiment of a carrier equipped with a rear bumper device of 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 transverse cross-sectional view of the lock element that is unlocked before loading and unloading.

FIG. 8 is an enlarged plan view of a main part illustrating a second embodiment of a carrier equipped with a rear bumper device of the present invention, in which a part is cut away.

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

FIG. 10 is an enlarged side view of a main part with a part cut away.

FIG. 11 is a partially cutaway enlarged side view of the main part in a state where the vehicle body leans backward and the rear bumper is in contact with the ground.

FIG. 12 is an enlarged side view of a main part showing a loading / unloading state, with a part cut away.

FIG. 13 is an enlarged side view of a main part illustrating a third embodiment of a carrier vehicle including the rear bumper device of the present invention.

FIG. 14 is an enlarged side view of a main part showing a loading / unloading state.

FIG. 15 is an enlarged plan view of a main part illustrating a fourth embodiment of a carrier having a rear bumper device according to the present invention, in which a part is cut away.

FIG. 16 is an enlarged rear view of a main part with a part cut away.

FIG. 17 is an enlarged vertical cross-sectional view of a main part.

FIG. 18 is an enlarged vertical cross-sectional view of a main part showing a loading / unloading state.

FIG. 19 is a partial enlarged plan view showing a lock element according to another embodiment, in which a part thereof is cut away.

FIG. 20 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.

[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 Rear bumper bumper part 10 Split groove on 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 long 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)

[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 rearward with the rear wheel as a fulcrum by the operation of the jack, the rear bumper has a bumper portion located at the rear-end rear-side collision protection position of the decorative plate on the trailing edge of the luggage carrier,
It consists of both left and right support arms that extend forward from the same barbar part and go directly under the split groove at the lower edge of the decorative plate to 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. A rear bum bar device for a transport vehicle in which a vehicle body leans backward, comprising a stopper element capable of restricting downward swinging from the rear-end collision protection position. 2. A lock element, which is provided on the shear frame side, is detachable from the rear bumper, and is capable of fixing the rear bumper to the rear impact protection position. A rear bum bar device for a carrier whose body leans backward. 3. A transport vehicle in which a vehicle body leans backward as set forth in claim 2, further comprising a switch for interlocking with the lock element, the switch being short-circuited with an indicator in the driver's cab. Rear bumper device.