WO2007074643A1

WO2007074643A1 - Transportation vehicle and bumper device for transportation vehicle

Info

Publication number: WO2007074643A1
Application number: PCT/JP2006/324823
Authority: WO
Inventors: Hidehito Hirano; Masataka Tokunaga; Hideyuki Iwashita
Original assignee: Kyokuto Kaihatsu Kogyo Co., Ltd.
Priority date: 2005-12-28
Filing date: 2006-12-13
Publication date: 2007-07-05

Abstract

A rearward warning device (33) is attached to the front end of a slide body (6). Also, a rear warning member (56) is attached to a bumper body (14). A bumper device (10) uses a parallel link and can translate the bumper body (14). The bumper body (14) in a work position is near the ground and extremely low. When the slide body (6) is moved to the vehicle rear side to tilt a lift frame (3), the rear warning member (56) attached to the bumper body (14) is visible from behind.

Description

Specification

Transport vehicle and transport vehicle bumper device

Technical field

[0001] The present invention relates to a transport vehicle having a function of moving a part of a cargo bed part or lowering a part of a cargo bed part to the ground, such as a vehicle truck, a container truck, a dump truck, and the like. It is related with the bumper apparatus. The bumper device for a transport vehicle according to the present invention is a freight vehicle having a function of moving a part of the cargo bed part or lowering a part of the cargo bed part to the ground like a vehicle transporter, a container transporter, a dump truck, etc. It is recommended to be mounted on.

Background art

[0002] A freight vehicle having a function of changing the attitude of a cargo bed or lowering the cargo bed to the ground is known. For example, Patent Document 1 discloses a body loading / unloading vehicle. The body loading and unloading vehicle disclosed in Patent Document 1 is a vehicle transporter, and is used when transporting a vehicle such as a passenger car or a civil engineering machine, and includes a lift frame and a slidable body. Yes. The vehicle disclosed in Patent Document 1 can be lowered to the ground by tilting the lift frame and sliding the body (loading platform).

[0003] In addition, a bumper is required for a cargo vehicle. In order to ensure safety when pedestrians and other vehicles collide, the bumper must protrude somewhat backwards from the vehicle body.

By the way, the above-described vehicle transporter or the like functionally inclines the posture of the loading platform part backward or lowers the loading platform part from the rear to the ground, and the bumper is attached in a state of protruding to the rear of the vehicle. Therefore, the bumper gets in the way when tilting the loading platform.

Therefore, Patent Document 2 proposes a structure for storing the bumper on the vehicle body side when loading and unloading work! RU

On the other hand, it is dangerous if the bumper moves while driving, and the bumper must be fixed to the vehicle while driving. Therefore, the bumper device described in Patent Document 2 is provided with a lock pin for fixing, and during the running, the cylinder is operated to insert the lock pin to prevent the bumper from moving.

[0004] Further, spare tires are mounted on automobiles such as passenger cars and trucks. In relatively small vehicles such as passenger cars, spare tires may be installed in the trunk room. Most large vehicles such as vehicle transporters have spare tires attached to the underside of the body. is there. For example, Patent Document 5 discloses a configuration in which a spare tire is externally attached to the lower surface of a vehicle body.

FIG. 42 is a side view of the rear bumper (bumper body) disclosed in Patent Document 2.

In the rear bumper 100 disclosed in Patent Document 2, a parallel link including arms 101 and 102 is employed to move the bumper 100 forward.

Here, the configuration disclosed in Patent Document 2 is intended to move the bumper 100 forward, and there is no significant change in the height of the bumper 100 before and after the movement. Further, since the parallel link disclosed in Patent Document 2 is intended to move the bumper 100 forward, the arms 101 and 102 are in an inclined posture both when traveling and when the vehicle is loaded and unloaded.

That is, in the configuration disclosed in Patent Document 2, the force that causes the bumper 100 to protrude toward the rear side of the vehicle when the vehicle travels is such that the arms 101 and 102 at this time are positioned such that the lower side is positioned behind the vehicle. Inclined at

On the other hand, when loading and unloading the vehicle, the force to move the bumper 100 to the front side of the vehicle. The arms 101 and 102 at this time are inclined such that the lower side is positioned in front of the vehicle.

[0007] In the configuration disclosed in Patent Document 2, the inclination angle toward the rear side of the arms 101 and 102 when the vehicle is traveling, and the inclination toward the front side of the arms 101 and 102 when the vehicle is loaded and unloaded The angle is substantially equal. Therefore, in the configuration disclosed in Patent Document 2, the height of the bumper 100 before and after movement is substantially the same.

[0008] Further, the bumper 100 disclosed in Patent Document 2 is attached with any electrically emitting member such as a hazard lamp. [0009] Further, Patent Documents 3 and 4 disclose a structure in which the bumper is reversed when performing operations such as loading and unloading. In the freight vehicles described in Patent Documents 3 and 4, taillights, etc. are attached to the bumpers, and the taillights, etc. are reversed together with the rear bumpers when performing operations such as loading and unloading.

Patent Document 1: Japanese Unexamined Patent Publication No. 2000-108768

Patent Document 2: Japanese Patent Laid-Open No. 2000-326807

Patent Document 3: Japanese Utility Model Publication No. 56-118140

Patent Document 4: Japanese Patent Laid-Open No. 2001-138793

Patent Document 5: Utility Model Registration No. 3097050

Disclosure of the invention

Problems to be solved by the invention

[0010] The vehicle transporter may be used for the purpose of transporting a car produced in a factory to a dealer or the like, but may be used for the purpose of collecting a vehicle that has failed on the road.

Here, when recovering a car that has failed on the road, drive the vehicle transporter, stop the failed vehicle, move to a place, park the vehicle transporter at that position, and perform the recovery work. It will be. For this reason, it is necessary to call attention to passing vehicles so that they do not collide with other vehicles traveling on the road.

In general, the hazard light of a vehicle carrier will blink to call attention to surrounding cars.

[0011] However, in the case of a vehicle transport vehicle that lowers the loading platform to the ground while exerting a force, the driver of the vehicle having a close rear force may not notice even if the hazard lamp is blinked.

In other words, the hazard ramp is often attached to the rear end of the vehicle body, but if the lift frame is tilted to lower the platform to the ground, the lift frame and the platform cover and hide the hazard ramp. The hazard lamp disappears from the rear.

[0012] Also, in the vehicles disclosed in Patent Documents 3 and 4, the taillights and the like are attached to the rear bumper. However, in the configuration disclosed in Patent Documents 3 and 4, the rear bumper is inverted and the lift frame or the like is reversed. As the rear bumper is reversed, the taillight is also reversed. Specifically, in the configuration of Patent Document 3, the taillight is completely directed downward. , Backward force is not visible.

Also in Patent Document 4, the taillight is irradiated downward, making it difficult to confirm the backward force.

[0013] In addition, the present applicant considered a configuration in which a hazard lamp is attached to the rear bumper 100 as disclosed in Patent Document 2, but the configuration disclosed in Patent Document 2 moves the rear bumper 100 forward. Therefore, the rear bumper 100 does not change its height before and after the movement as described above. Therefore, if the lift frame that lowers the cargo bed to the ground is tilted, the lift frame will cover the hazard ramp and the rear force hazard ramp will not be visible, so the configuration disclosed in Patent Document 2 Was a problem that could not solve the problem.

Accordingly, the present invention focuses on the above-described problems of the prior art, and an object thereof is to develop a transport vehicle that can clearly call attention to a vehicle approaching from behind.

[0015] As described above, in a large vehicle such as a vehicle transporter, a spare tire is externally attached to the lower surface of the vehicle body. If the tire on the axle is punctured, lower the spare tire from the underside of the car body and replace it with a punctured tire.

However, tires mounted on large automobiles are considerably larger and heavier. For this reason, it is difficult to remove the spare tire in the conventional vehicle transport vehicle, and in reality, it is impossible for one person to lower the spare tire.

[0016] In addition, the tire performance has been improved in recent years, so the frequency of tire puncture has decreased.

. For this reason, it is uneconomical to provide a vehicle carrier with a special configuration only for removing spare tires.

Accordingly, the present invention focuses on the above-described problems of the prior art, and an object of the present invention is to provide a configuration for removing a spare tire by utilizing other functional members.

Furthermore, according to the bumper device disclosed in Patent Document 2, the bumper does not get in the way when loading and unloading cargo. Also, there is no concern about the bumper moving while driving.

However, since the bumper device disclosed in Patent Document 2 prevents the movement of the bumper by the lock pin, a power source such as a cylinder for operating the lock pin is essential.

Therefore, the bumper device according to the prior art has a problem that the manufacturing cost increases. Also The conventional bumper device has a problem that maintenance is troublesome because a power source such as a cylinder is essential.

[0018] Therefore, the present invention focuses on the above-described problems of the prior art, improves the structure for preventing the movement of the bumper, and can fix the bumper without depending on a power source such as a cylinder. Development is a challenge. Means for solving the problem

[0019] The present invention for solving the above-mentioned problems is based on the fact that the presence of the transport vehicle is detected by lightning with respect to a vehicle approaching from the rear, with respect to the transport vehicle having a loading platform that is movable with respect to the vehicle body. A rear warning member for notifying, and the rear warning member can be repositioned to a travel time position suitable for travel and a work time position suitable for performing a predetermined work by moving the loading platform. A transport vehicle characterized by maintaining a posture in which a rear warning member is always directed rearward when the position is changed.

[0020] In the transport vehicle of the present invention, the rear warning member can be repositioned between a traveling position suitable for traveling and a working position suitable for a predetermined work. Therefore, the rear warning member does not get in the way during work.

Further, in the transport vehicle according to the present invention, the posture of the rear warning member is always maintained at the rear when the position is changed.

[0021] In the transport vehicle of the present invention, the loading platform can be moved to a position where the loading platform is loaded on the vehicle body and transported, and a position when performing a predetermined operation. Move to the working position before reaching the working position.

[0022] In the transport vehicle of the present invention, the rear warning member moves to the working position before the loading platform reaches the position where the predetermined work is performed. In addition, since the posture of the rear warning member at that time is a posture facing backward, the rear warning member can also see the rear force well. For this reason, the rear warning member can be seen from the rear during part or all of the operation period until the loading platform reaches the position where the predetermined work is performed.

[0023] In the transport vehicle of the present invention, the height of the working position of the rear warning member is set near the ground.

[0024] In the transport vehicle of the present invention, the height at the working position of the rear warning member is near the ground. Therefore, for example, the present invention is placed on the ground like a vehicle transporter or a container transporter. When it is adopted for a transport vehicle with a structure to be lowered, the rear warning member can be confirmed from the rear until just before the loading platform landing on the ground.

[0025] The transport vehicle of the present invention includes a moving mechanism that moves the rear warning member, and the moving mechanism is a parallel link mechanism, and is configured by attaching the rear warning member to the moving mechanism in a posture facing rearward. did.

[0026] The transport vehicle of the present invention includes a parallel link mechanism. Therefore, the rear warning member can be translated while maintaining the posture. In other words, the rear warning member is always facing rearward even during movement, and it is easy to confirm from the rear.

[0027] The transport vehicle of the present invention is provided with an auxiliary warning member (rear warning device) for informing the presence of the transport vehicle by lightning to the vehicle approaching from the rear on the front half side of the vehicle main body or the loading platform. It was.

[0028] The present invention is suitable for a transport vehicle having a structure in which a loading platform is lowered to the ground like a vehicle transport vehicle or a container transport vehicle.

In the transport vehicle in which the present invention is implemented, an auxiliary warning member (rear warning device) is attached to the front half of the vehicle main body or the loading platform. According to the experiments by the present inventors, the auxiliary warning member attached to the loading platform or the like can be seen well from the rear when the loading platform is inclined at a high angle or when the loading platform is lowered to the ground. If the loading platform is on the vehicle and is in a horizontal posture while the load is applied, it is difficult to check the rear force due to the load and the tread.

The rear warning member can confirm the rear force when tilting the platform or lowering the platform, but it is difficult to confirm from the rear after the platform is lowered to the ground. Become.

Therefore, in the present invention, a warning member is provided on both the loading platform and the bumper to be lowered, and the warning member can always be confirmed by the synergistic effect of both.

In other words, the rear warning member makes it easy to check the rear force from the state where the transport vehicle is stopped and the loading platform is horizontal to the stage where the loading platform is tilted, and until the tilting is considerably advanced and the loading platform is lowered. Yes, it is possible to inform the rear vehicle of the presence of the transport vehicle. In addition, after a situation in which the inclination of the loading platform has progressed considerably, the auxiliary parts attached to the loading platform etc. The auxiliary warning member can easily see the rear force, and the rear vehicle can be informed of the presence of the transport vehicle.

Therefore, the transport vehicle of the present invention can notify the vehicle behind it at any stage of a series of operations.

[0029] In the transport vehicle of the present invention, a loading plate is provided with a tread, and the tread can be changed between a standing posture and a horizontal posture at the rear end of the loading platform, and the loading platform can be tilted. In this case, the height of the ground changes with the inclination of the loading platform, and when the back of the vehicle body is projected in a normal projection and the stepping plate covers the auxiliary warning member, the rear warning member The vehicle body is configured so that the rear force can be viewed in a normal projection.

[0030] In the present invention, an auxiliary warning member is provided on the front half side of the vehicle main body or the loading platform portion to notify the vehicle approaching from the rear by lightning of the presence of the transport vehicle. The present invention is applied to a vehicle having a configuration in which a footboard is provided with a footboard, such as a vehicle transporter. In vehicles with a footboard on the loading platform, such as a vehicle transporter, when the footboard is raised, the footboard may overlap the auxiliary warning member, making it difficult to check the rear force.

Therefore, the transport vehicle of the present invention is configured such that when the treadle covers the auxiliary warning member when the vehicle body is viewed in normal projection from the rear force, the rear warning member can also see the rear force. Therefore, when it is difficult to see the auxiliary warning member by the tread board, the rear warning member informs the vehicle that the rear force is approaching that the transporting vehicle is present.

As an embodiment of the present invention, a configuration in which the auxiliary warning member is at a position where the backward force can be seen in the case of HB≥HFL when the height of the auxiliary warning member is HFL and the maximum height of the tread plate is HB is considered. It is done. More specifically, in the case of HB≥HFL, the rear warning member is located further below the lower end of the loading platform and can be seen from the rear.

[0031] The transport vehicle of the present invention includes a moving mechanism for moving the rear warning member, and a bumper body is attached to the moving mechanism.

[0032] In the present invention, the bumper body can be repositioned into a travel position suitable for travel and a work position suitable for a predetermined work. Therefore, the bumper body does not get in the way during work. In the present invention, the device for moving the rear warning member and the bumper are moved. Since the apparatus to be used is common, it can be manufactured at a low cost with a small number of parts.

[0033] The transport vehicle of the present invention includes a moving mechanism that moves the rear warning member and the bumper body, and the moving mechanism includes a swing arm, a bumper arm that holds the bumper body, an auxiliary connecting member, and a fixing member. When the rear warning member is moved to the working position, the swing arm is moved from the suspended position to the horizontal position, and the auxiliary connecting member swings. As the arm moves, it moves in parallel, and the bumper arm is configured to rise while maintaining a substantially horizontal posture.

[0034] Here, "the posture in which the swing arm is suspended" means that a portion (for example, a pin) connected to another member is positioned vertically, and the appearance of the swing arm It has nothing to do with. For example, if the swing arm is circular and one pin is in the center, the appearance will not change even if the swing arm posture changes, but the position relationship with the other pin If it is up and down, it is “the posture in which the swing arm is suspended”.

In the transporting vehicle of the present invention, when the working position force is also moved to the traveling position, the swinging arm is moved toward the horizontal posture. Therefore, in the transport vehicle according to the present invention, the heights of the rear warning member and the bumper body are large before and after the movement. Therefore, the heights of the traveling position and the working position can be greatly different.

That is, when looking at the movement of the arm according to the configuration disclosed in Patent Document 2 described above, the arm reaches an attitude force that is inclined to one side and is further inclined in the opposite direction. Therefore, the height of the bumper main body is once lowered from a high position and then raised again.

On the other hand, in the transport vehicle according to the present invention, when the vehicle is moved from the working position to the traveling position, the posture force with the swing arm hanging is also moved toward the horizontal posture. For this reason, the rear warning member and the bumper body always have the lowest potential. Of course, when moving to the position at the time of running position force, the swinging arm will move toward the position where it is drooping.

[0035] In the transport vehicle of the present invention, the moving mechanism includes a drive source and a transmission mechanism that moves the bumper body by transmitting the movement of the drive source to the bumper body, and at least one of the elements constituting the transmission mechanism. The bumper body side force has two thought points that can cause two types of movement. Thus, when the bumper body is moved from the working position to the traveling position, the element is configured to move beyond the thought point.

[0036] In the transport vehicle of the present invention, at least one of the elements constituting the transmission mechanism has a conceivable point in which two types of motion can occur with respect to the force received from the bumper body side. Then, when moving the bumper body to the working position, the element moves beyond the thought point. Assuming that the movement direction of the element when moving the working position force to the traveling position is the positive direction, the element will move in the positive direction when moving the bumper body from the working position to the traveling position. Over.

On the other hand, when a force is applied to the bumper body side, this force is transmitted to the transmission mechanism. As described above, since at least one of the elements is in a position beyond the thought point, when the force on the bumper body is also applied, the element tries to move further in the forward direction. Therefore, the force from the bumper body side can be resisted and the movement of the bumper body is prevented.

[0037] The transport vehicle of the present invention has a configuration suitable for a vehicle transport vehicle, and it is desirable to employ the transport vehicle that can lower the loading platform to the ground.

[0038] Further, as a result of diligent studies to solve the problem, the present inventor has thought that a mechanism for moving the bumper is also used for removing the spare tire.

That is, as described above, a cargo vehicle having a function of changing the posture of the loading platform or lowering the loading platform to the ground has a problem that the bumper becomes an obstacle when the loading platform is tilted. For this reason, it is desirable to temporarily evacuate the bumper when lowering the loading platform to the ground in vehicle transport vehicles.

Therefore, it was decided that the bumper was retreated to the ground side by the lifting device, and that the spare tire was lifted and lowered by this bumper lifting device.

[0039] The transport vehicle of the present invention completed based on the above-described idea is a transport vehicle including a vehicle body, a bumper attached to the vehicle body, and a loading platform portion movable with respect to the vehicle body! Finally, a lifting device for raising and lowering the bumper was provided, and a spare tire was attached to the lifting device.

[0040] According to the transport vehicle of the present invention, it is possible to change the position of the bumper between the traveling position suitable for traveling and the working position suitable for predetermined work. Therefore, the bumper does not get in the way during work. In addition, since the spare tire is lowered by lowering the bumper, the spare tire can be easily lowered.

[0041] The transport vehicle of the present invention includes an arm for holding a bumper in the lifting device, and a spare tire is attached to the arm.

[0042] The transport vehicle of the present invention includes two arms for holding a bumper in the lifting device, and a spare tire is attached between the arms.

[0043] Since the transport vehicle of the present invention attaches the spare tire to the dead space between the two arms, it is not necessary to secure a dedicated installation space for the spare tire.

[0044] In the transporting vehicle of the present invention, the lifting device or the bumper includes a frame body, and the frame body is located near the bottom surface of the vehicle body when the bumper is in the raised position, and a spare tire is attached to the frame body. I attached.

[0045] In the present invention, when the frame strength bumper to which the spare tire is attached is located near the bottom surface of the vehicle body when it is in the raised position, the height from the lifting device and the spare tire cage to the ground can be increased. .

[0046] The transport vehicle of the present invention has a lifting device counter mechanism, the elements constituting the link mechanism have a three-dimensional framework, and a spare tire is attached to the framework.

In the transport vehicle of the present invention, the lifting device has a link mechanism, and the elements constituting the link mechanism constitute a three-dimensional framework, and a spare tire is attached to this framework. Therefore, it is possible to hold the spare tire having a high lifting / lowering device with high strength.

[0048] In the transport vehicle of the present invention, the elevating device has a drive source independent of the drive source force for moving the loading platform.

[0049] In the transport vehicle of the present invention, the drive source of the lifting device is different from the drive source of the cargo bed, and both are independent. Therefore, the spare tire can be attached and detached without moving the loading platform.

[0050] In the transport vehicle of the present invention, the lifting device includes a drive source and a transmission mechanism that moves the bumper by transmitting the movement of the drive source to the bumper, and at least one of the elements constituting the transmission mechanism is on the bumper side. There are thought points that can cause two kinds of movements with respect to the force received from the body, and when the bumper is moved up and down, the element is configured to move beyond the thought points.

[0051] The present invention includes a configuration for preventing the spare tire from descending. Said As you can see, spare tires are very heavy and should never be dropped or dropped while driving. Here, a configuration in which pins or the like are inserted in order to prevent the spare tire from descending is conceivable. However, according to this configuration, a cylinder or the like for driving the pins or the like is required, and the number of parts increases.

In view of this, the present invention is provided with a function of preventing an excessive increase in the number of parts and preventing the spare tire from descending.

That is, in the transport vehicle of the present invention, at least one of the elements constituting the transmission mechanism has a thought point that two types of motion can occur with respect to the force received from the pump side. And when raising and lowering the bumper, the element moves beyond the thought point. For example, if the bumper is lowered, and the movement direction of the element when moving to the raised position is positive, the element moves in the positive direction when moving the bumper from the lowered position to the traveling position. Beyond

On the other hand, when force is applied to the bumper or spare tire, this force is transmitted to the transmission mechanism. Here, as described above, since at least one of the elements is in a position beyond the thought point, when force is applied from the bumper or the spare tire side, the element tries to move further in the forward direction. Therefore, it can resist the force of the bumper side force and prevent the spare tire from descending

[0052] In the transport vehicle of the present invention, a rotating member that rotates around a rotation axis can be adopted as an element having a thought point.

[0053] In the transport vehicle of the present invention, the lifting device has a chain mechanism including a swing arm, a bumper arm that holds the bumper body, an auxiliary connecting member, and a fixing member, and works on the bumper body. Position force When moving to the travel position, the posture force with which the swing arm is suspended is also moved toward the horizontal posture, and the auxiliary connecting member moves in parallel with the movement of the swing arm, and the bumper arm Is configured to rise while maintaining a substantially horizontal posture.

[0054] As described above, the "posture in which the swing arm is suspended" means that a portion (for example, a pin) connected to another member is positioned vertically, and the appearance of the swing arm It has nothing to do with shape. In the transport vehicle according to the present invention, when the descending position force is also moved to the ascending position, the swinging arm is suspended and the posture force is moved toward the horizontal posture. Therefore, in the transport vehicle of the present invention, the height of the bumper has a large drop before and after the movement, and the spare tire also has a large drop before and after the movement. This makes it easier to remove the spare tire.

That is, when looking at the movement of the arm according to the configuration disclosed in Patent Document 3 described above, the arm reaches a posture that is inclined to one side and is further inclined to the opposite direction. Therefore, the height of the bumper decreases once from a high position and then increases again. Therefore, even if a spare tire is attached to the configuration disclosed in Patent Document 3, the spare tire cannot be lowered to the ground.

On the other hand, in the transport vehicle of the present invention, when moving from the working position to the traveling position, the swinging arm moves toward the horizontal posture where the swing arm is suspended. For this reason, the bumper (spare tire) always tends to rise from the lowest position. Of course, ascent position force suitable for running When moving to a descending position suitable for removing spare tires, the swing arm must move toward a suspended position. It becomes.

[0055] Further, the bumper device of the present invention is a bumper device attached to a vehicle, and includes a bumper body and a moving mechanism for moving the bumper body. In the bumper device that can be repositioned to a working position suitable for work, the moving mechanism is equipped with a transmission mechanism that transmits the drive source and the movement of the drive source to the bumper body to move the bumper body, and constitutes a transmission mechanism At least one of the elements to be operated has a thought that two types of movement can occur with respect to the force received by the bumper body side force, and when moving the bumper body from the working position to the traveling position, the element is It was configured to exercise beyond the thought point.

[0056] The bumper device of the present invention can change the position of the bumper body between a travel position suitable for travel and a work position suitable for a predetermined work. Therefore, the bumper does not get in the way during work.

In the bumper device of the present invention, at least one of the elements constituting the transmission mechanism is a bumper. There are some thought points where two types of motion can occur with respect to the force received from the upper body side. When the bumper body is moved to the working position, the element moves beyond the thought point. Working position force If the movement direction of the element when moving to the traveling position is the forward direction, when moving the bumper body from the working position to the traveling position, the element moves in the forward direction and exceeds the point of thought. .

[0057] As the element having the thought point, it is possible to employ a rotating member that rotates about the rotation axis.

In the bumper device of the present invention, the drive source is a cylinder, the bumper body moves from the working position to the traveling position by contracting or extending the cylinder, and the bumper body is in the traveling position. The direction of the force that the cylinder sometimes receives on the bumper body side force is configured to be the same as the expansion / contraction direction of the cylinder when the bumper body is moved from the working position to the traveling position.

[0059] In the bumper device of the present invention, a cylinder is employed as a drive source. Therefore, when the bumper body is in the running position, the cylinder is in a substantially contracted state or in a fully extended state. In the present invention, the direction of the force that the cylinder receives from the bumper body side when the bumper body is in the traveling position is the same as the expansion and contraction direction of the cylinder when the bumper body is moved from the working position to the traveling position. So the rod stops at either end of the cylinder.

That is, the direction of the force that the cylinder receives from the bumper body side is set to the direction that causes the cylinder to contract when the cylinder is fully contracted, and conversely the direction that causes the cylinder to extend when the cylinder is fully extended. . In this way, the rod cannot move relative to the cylinder. Therefore, the movement of the bumper body is blocked by either end of the rod.

[0060] In the bumper device of the present invention, the moving mechanism holds the swing arm and the bumper body. It has a bumper arm and a chain mechanism composed of an auxiliary connecting member and a fixing member. When moving the bumper body from the working position to the running position, the swinging arm is hung down and the horizontal force is applied. The auxiliary connecting member is moved in parallel with the movement of the swinging arm, and the bumper arm is lifted while maintaining a substantially horizontal posture.

Here, “the posture in which the swing arm is suspended” means that a portion (for example, a pin) connected to another member is positioned up and down, and the appearance shape of the swing arm It has nothing to do with. For example, if the swing arm is circular and one pin is in the center, the appearance will not change even if the swing arm posture changes, but the position relationship with the other pin If it is up and down, it is “the posture in which the swing arm is suspended”.

In the bumper device of the present invention, the bumper arm moves up while maintaining a substantially horizontal posture, so that the reflectors and lights attached to the bumper always maintain the horizontal posture. For this reason, other vehicles, passers-by reflectors, lights, etc. are visible, contributing to accident prevention.

[0062] In the bumper device of the present invention, the auxiliary connecting member prevents the distance between the bumper arm and the fixing member from becoming a certain distance or more, and allows the distance between the two to be shortened.

[0063] In the bumper device of the present invention, the auxiliary connecting member prevents the distance between the bumper arm and the fixing member from exceeding a certain distance and allows the distance between them to be shortened. Here, since the auxiliary connecting member constitutes a series of chain mechanisms together with the swing arm, the bumper arm and the fixing member, this chain has a degree of freedom in the direction of contraction. Therefore, when the bumper body is moved, if the bumper device hits any obstacle, the chain mechanism described above will shrink. Therefore, even if the bumper device of the present invention collides with any obstacle when the bumper body is moved, the bumper device can escape the impact, so that the bumper device is not broken.

[0064] In the bumper device of the present invention, the moving mechanism includes a swing arm and a bumper arm that holds the bumper body, and the swing arm and the bumper arm are swingably coupled via a pin. An engaging means is provided for engaging the two when the angle between the two is within a certain range. When the bumper body is moved from the working position to the traveling position, the swing arm is suspended. Lowered posture force Moves toward a horizontal posture, and during that time, when the swinging arm and the bumper arm are at a certain angle, the engaging means engages the bumper arm with the swinging arm. When moving the bumper body to the position during operation, the swing arm moves in the direction of drooping, while the bumper arm lands on the ground while the swing arm and bumper move. The angle with the arm is changed so that the engagement means is disengaged.

The “pin” as a component of the present invention includes a shaft.

In the bumper device of the present invention, the swing arm and the bumper arm are engaged with both the pin and the engaging means. However, the pin always connects both, but the engaging means engages both only when the angle between them is within a certain range. In the bumper device of the present invention, when the bumper body is moved to the working position and the running position, the swing arm moves the suspended posture force in the horizontal position. Here, the force that the swing arm and the bumper arm are always engaged by the pin also moves the pin portion of the bumper arm together with the swing arm. The angle between the swing arm and the bumper arm changes according to the swing angle of the swing arm.

When the swing arm and the bumper arm are at a certain angle, the engaging means engages. Thereafter, the bumper arm moves integrally with the swing arm. That is, the bumper arm is lifted as a whole.

On the contrary, when the bumper body is moved to the position during operation, the swing arm moves in the drooping direction. At this time, the engaging means is engaged, and the bumper arm is lowered integrally with the swing arm.

When the bumper arm lands on the ground, a part of the bumper arm cannot descend any more! /, So the angle between the swing arm and the bumper arm changes.

When the angle between the two becomes a constant angle, the engagement means is disengaged.

[0066] The bumper device of the present invention has a function of escaping upward when receiving a force from the lower part of the bumper body or the bumper arm force.

[0067] The bumper device of the present invention can escape upward when the bumper body or the bumper arm receives the lower force. Therefore, when moving the bumper body, Even if one device hits an obstacle on the ground surface, the impact can be missed and the bumper device will not break.

In the bumper device of the present invention, a roller is provided on the bumper arm or the bumper body.

[0069] In the bumper device of the present invention, the bumper arm or the bumper body is provided with a mouth opening! Therefore, when the bumper body is moved, after the bumper body etc. land on the ground, it smoothly moves along the ground. Can move and has no scratching force.

[0070] In the bumper device of the present invention, a grounding member is provided on the swing arm.

In the bumper device of the present invention, a grounding member is provided on the swing arm. Therefore, when a local load is applied to the vehicle body and a part of the vehicle body sinks excessively, or when the vehicle rotates about one row of wheels and the other row wheels are about to lift, the grounding member Touches the ground and supports the load. Therefore, according to the present invention, there is no problem that a part of the vehicle body sinks excessively or the front wheels are lifted.

[0072] In the bumper device of the present invention, the vehicle to which the bumper device is attached is a freight vehicle, and has a cargo bed portion that moves on the vehicle body, and the moving mechanism of the bumper device has an engagement portion in part. When the main body is in the traveling position, the engaging portion is in a position where it can engage with the loading platform, and when the bumper body is in the working position, the engaging portion is in a position where it cannot engage with the loading platform. I did it.

[0073] In the bumper device of the present invention, the movement mechanism of the bumper device has an engaging portion in part. When the bumper body is in the traveling position, the engaging portion is in a position where it can engage with the loading platform. Therefore, when some trouble occurs while the vehicle is running and the cargo bed is about to move, this is prevented.

Further, when the bumper main body is in the working position, the engaging portion cannot be engaged with the loading platform portion, so that the engaging portion does not hinder normal work.

The invention's effect

[0074] The transporting device of the present invention can clearly call attention to a vehicle approaching a rear force, and has an effect of preventing a traffic accident.

[0075] Further, in the transport vehicle of the present invention, it is easy to remove the spare tire. In addition, the transport vehicle of the present invention uses a device that moves the bumper to remove the spare tire. Therefore, the increase in the number of parts is small.

Furthermore, the bumper device of the present invention can fix the bumper body regardless of a power source such as a cylinder. Therefore, the bumper device of the present invention has a small number of parts. Also, maintenance is easy without requiring maintenance of cylinders.

Brief Description of Drawings

[FIG. 1] (a) is a side view of a vehicle transport vehicle according to the present invention in a traveling state. (b) is a rear view of the vehicle carrier of (a).

FIG. 2 (a) is a side view of the vehicle transport vehicle showing a state in which the bumper device is retracted forward in the vehicle transport vehicle of FIG. (B) is a rear view of the vehicle transport vehicle of (a).

[FIG. 3] (a) is a side view of the vehicle carrier in the state where the tilt of the lift frame is started in the vehicle carrier of FIG. (B) is a rear view of the vehicle transport vehicle of (a).

FIG. 4 (a) is a side view of the vehicle transport vehicle showing a state in which the lift frame is further inclined and the rear end is landed in the vehicle transport vehicle of FIG. (B) is a rear view of the vehicle carrier of (a).

FIG. 5 (a) is a side view of the vehicle transport vehicle showing a state in which the slide body is slid rearward in the vehicle transport vehicle of FIG. (B) is a rear view of the vehicle carrier of (a).

[FIG. 6] (a) is a side view of the vehicle transport vehicle showing a state in which the slide body is completely landed in the vehicle transport vehicle of FIG. (B) is a rear view of the vehicle transport vehicle of (a).

[FIG. 7] (a) is a side view of the vehicle transport vehicle showing a state where the treadle is tilted in the vehicle transport vehicle of FIG. (B) is a rear view of the vehicle transport vehicle of (a).

FIG. 8 is a front view of the bumper device of the first embodiment employed in the transport vehicle of the present invention, showing a state when the bumper body is in a working position.

FIG. 9 is a front view of the bumper device of the first embodiment employed in the transport vehicle of the present invention, and shows a state when the bumper body is in a traveling position.

FIG. 10 is a skeleton diagram of the bumper device according to the first embodiment employed in the transport vehicle of the present invention, showing a state when the bumper is in a working position.

FIG. 11 is a skeleton diagram of the bumper device of the first embodiment employed in the transport vehicle of the present invention. And shows a state in the middle of the bumper from the working position to the traveling position.

12] A skeleton diagram of the bumper device according to the first embodiment employed in the transport vehicle of the present invention, showing a state when the bumper is in the traveling position.

FIG. 13 is a skeleton diagram in which the part of the rotating member is enlarged in the skeleton diagram of the bumper device shown in FIG. 10, and shows the state when the bumper is in the working position.

FIG. 14 is a skeleton diagram in which the part of the rotating member is enlarged in the skeleton diagram of the bumper device shown in FIG. 11, showing the state where the bumper is in the middle from the working position to the traveling position.

FIG. 15 is a skeleton diagram in which the part of the rotating member is enlarged in the skeleton diagram of the bumper device shown in FIG. 12, and shows the state when the bumper is in the traveling position.

16] A skeleton diagram of the bumper device of the second embodiment employed in the transport vehicle of the present invention, showing a state when the bumper is in a working position.

17] It is a skeleton diagram of the bumper device of the second embodiment adopted in the transport vehicle of the present invention, and shows a state in the middle of the bumper from the working position to the traveling position.

[18] FIG. 18 is a skeleton diagram of the bumper device according to the second embodiment employed in the transport vehicle of the present invention, and shows a state when the bumper is in a traveling position.

[19] FIG. 19 is a skeleton diagram of the bumper device of the second embodiment employed in the transport vehicle of the present invention, and shows the behavior when it collides with an obstacle.

20] A sectional view of an auxiliary connecting member employed in the bumper device of the second embodiment employed in the transport vehicle of the present invention.

21] A front view showing a modification of the auxiliary connecting member employed in the transport vehicle of the present invention.圆 22] It is a modified example of the bumper device of the second embodiment adopted in the transport vehicle of the present invention, and is a skeleton diagram when a wire is adopted as an auxiliary connecting member, and the state when the bumper is in the working position Indicates.

圆 23] This is a modified example of the bumper device of the second embodiment adopted in the transport vehicle of the present invention, and is a skeleton diagram when a wire is adopted as an auxiliary connecting member, and shows the behavior when colliding with an obstacle. Show.

圆 24] Skeleton diagram of the bumper device of the third embodiment employed in the transport vehicle of the present invention And shows the state when the bumper is in the working position.

25] A skeleton diagram of the bumper device of the third embodiment employed in the transport vehicle of the present invention, showing a state in the middle of the bumper from the working position to the traveling position.

[26] FIG. 26 is a skeleton diagram of the bumper device of the third embodiment employed in the transport vehicle of the present invention, and shows a state when the bumper is in a traveling position.

[27] FIG. 27 is a perspective view of the engaging means employed in the third embodiment employed in the transport vehicle of the present invention.

FIG. 28 is an explanatory diagram showing the operation of the bumper device of the third embodiment employed in the transport vehicle of the present invention, showing the state when the bumper is in the working position.

FIG. 29 is an explanatory view showing the operation of the bumper device of the third embodiment employed in the transport vehicle of the present invention, and shows a state in the middle of the bumper reaching the working position and the driving position.

FIG. 30 is an explanatory view showing the operation of the bumper device of the third embodiment employed in the transport vehicle of the present invention, and shows a state when the bumper is in a traveling position.

[31] FIG. 31 is a perspective view of a bumper device according to an embodiment of the present invention.

[32] FIG. 32 is an exploded perspective view of the bumper device shown in FIG.

FIG. 33 is a cross-sectional view of a spare tire carrier employed in the bumper device of FIG.

FIG. 34 is a perspective view of a bumper device according to another embodiment of the present invention.

35] FIG. 35 is an exploded perspective view in which the main part of the bumper device shown in FIG. 34 is extracted.

FIG. 36 is an explanatory view showing the relationship between the bumper arm and the spare tire of the bumper device shown in FIG. 34, (a) is a perspective view thereof, and (b) is a side view thereof in the A direction.

FIG. 37 is an explanatory view showing a relationship between a bumper arm and a spare tire of a bumper device in still another embodiment of the present invention, (a) is a perspective view thereof, and (b) is a side in the A direction thereof. FIG.

FIG. 38 is an explanatory view showing a relationship between a bumper arm and a spare tire of a bumper device in still another embodiment of the present invention, (a) is a perspective view thereof, and (b) is a side in the A direction thereof. FIG.

FIG. 39 is a perspective view of a bumper device according to yet another embodiment of the present invention.

40] A perspective view showing a modification of the bumper device employed in the transport vehicle of the present invention. FIG. 41 is a perspective view showing another modification of the bumper device employed in the transport vehicle of the present invention.

FIG. 42 is a side view of a conventional rear bumper (bumper body).

Explanation of symbols

1 truck (vehicle carrier)

2 Vehicle loading device

3 Lift frame

5 Tilt mechanism

6 Slide body (loading part)

7 Subframe

8 Treadle

10 Bumper device

11 Bumper drive (moving mechanism)

12 Reverse rotation prevention mechanism (transmission mechanism, moving mechanism)

13 Power section (transmission mechanism, moving mechanism)

14 Bumper body

15 Swing arm

16 Bumper arm

17 Auxiliary connecting member

18 Fixing member

19 b

20, 21 Pin for mounting the swing arm 15

22, 23 Pin to attach auxiliary connecting member 17

25 Rotating member

26 articulated links

27 Hydraulic cylinder

28 pins (rotation center of rotating member 25)

29 Pin that connects the base end of the connecting link 26 to a part of the rotating member 25 30 Rod for hydraulic cylinder

31 Pin that connects the tip of the connecting link 26 and the midway part of the swing arm 15

33 Rear warning device

35 Pin that connects rotating member 25 and rod 30 of hydraulic cylinder 27

36 Recessed part provided on rotating member 25

36a Corner of rotating member 25 close to recess 36

40, 40 'bumper device

41 Auxiliary connecting member

43 Shock absorber

55 Bumper equipment

56 Rear warning element

57 Engagement means

58 Hinge member

61 Hazard lamp unit (rear warning member)

66 Main parts

67, 68 pier

70 Hinge member

75 Continuous member mounting part

80 Lifting device

101 Spare tire

105 frame

108 Spare tire carrier

121 bumper equipment

a Vector generated when hydraulic cylinder 27 contracts

b Bumper body when hydraulic cylinder 27 contracts Vector of reaction force of 14 side force BEST MODE FOR CARRYING OUT THE INVENTION

Embodiments of the present invention will be further described below.

In the following embodiments, first, the structure of the vehicle carrier will be briefly described, and then The bumper device will be described. In the following description, the “front and rear” relationship is based on the front and rear of the vehicle unless otherwise specified. That is, the cab 9 side is the front and the reverse is the back.

1 to 7 show a vehicle carrier of the present invention, where (a) is a side view and (b) is a rear view.

The vehicle carrier 1 (truck) has a structure that operates as shown in FIGS. 1 to 7, and a vehicle loading device 2 is mounted on a vehicle body 4 of the vehicle carrier 1. The vehicle loading device 2 is roughly divided into a lift frame 3, a tilt mechanism 5, and a slide body 6 (loading platform).

The lift frame 3 is installed on the subframe 7 of the truck 1 and swings around a pin (not shown) provided on the rear end side of the truck. In other words, it is possible to take an inclined posture as shown in Figs.

[0081] The tilt mechanism 5 includes a cylinder 5a and a link mechanism 5b, and is for making the lift frame 3 in an inclined posture.

The slide body 6 (loading section) is slidably attached to the above-described lift frame 3, and a chain (not shown) is suspended and moves linearly along the lift frame 3. A tread plate 8 is provided at the rear end of the slide body 6. The tread board 8 is attached to the rear end of the slide body 6 via a hinge (not shown), and can swing with respect to the main body portion of the slide body 6.

That is, the tread plate 8 is located at the rear end of the slide body 6 (loading section) and can change its posture between a standing posture and a flat posture. Since the posture and position of the slide body 6 (loading platform) changes, the maximum height of the tread board 8 also changes. In each figure, the maximum height of the tread 8 is HB. The maximum ground clearance at the rear end of slide body 6 (loading platform) is HR.

[0083] There is a gate-shaped reinforcing frame 34 at the front end of the slide body 6 (loading platform). A rear warning device 33 (auxiliary warning member) is attached to the back side of the reinforcing frame 34. The rear warning device 33 is specifically a hazard lamp, a reflector, or the like, and is a device that notifies the vehicle approaching from the rear of the vehicle carrier 1.

As mentioned above, the slide body 6 (loading section) changes its posture and position, so it is an auxiliary warning member. The height of the center of 33 also changes. In each figure, the height of the auxiliary warning member 33 is HFL.

When the vehicle 1 is traveling, the lift frame 3 is placed in a horizontal position as shown in FIG. 1 (a), and the slide body 6 (loading platform) is pulled up on the lift frame 3. Sliding body ^{6 The} tread ⁸ provided on the heel is run in an upright position.

When loading or unloading the vehicle (conveyed material), lower the bumper body 14 as shown in Fig. 2, and then move the slide body 6 (loading platform) to the vehicle rear end side as shown in Fig. 3 so that the lift frame 3 Tilt and raise it to the maximum angle as shown in Fig. 4 and land the rear end of the slide body 6 on the ground.

Then, the slide body 6 (loading part) is moved to the rear side of the vehicle, and the slide body 6 (loading part) is lowered as shown in FIG.

Eventually, when the entire bottom surface of the slide body 6 (loading section) has landed as shown in FIG. 6, the tread plate 8 is set in a horizontal position as shown in FIG. 7, and the vehicle (conveyed object) is carried in or out.

A bumper device 10 is attached to the rear end portion of the vehicle transport vehicle 1. The bumper device 10 includes a lifting device 80 and a bumper body 14. A spare tire 101 is attached to the lifting device 80 by bolts (not shown). The bumper body 14 is provided with a hazard lamp (rear warning member) 56 as shown in each figure (b).

The lifting device 80 of the bumper device 10 employs a parallel link as will be described later, and can move the bumper body 14 and the spare tire 101 in parallel. Therefore, the rear warning member 56 also moves in parallel, and the rear warning member 56 always faces rearward.

That is, the bumper body 14 and the rear warning member 56 can move from the travel position as shown in FIG. 1 to the work position as shown in FIG. In the traveling position, the bumper body 14 projects rearward of the vehicle carrier 1, and its height is close to the vehicle body 4 (loading platform). The spare tire 101 is within the projected area of the vehicle body 4, and is at the lower part of the vehicle body 4 and close to the vehicle body 4.

On the other hand, the working position is the front side of the vehicle, and its height is very low near the ground.

Rear warning member 56, bumper body 14 and spare tire 101 in the working position It is ideal that the height is near the ground as described above, which is more preferable as it is lower. That is, the height of the rear warning member 56 and the bumper body 14 at the working position is not much different from the traveling position.Specifically, when the difference between the two is less than twice, the lift frame 3 is slightly inclined. As a result, the rear warning member 56 on the bumper side is hidden. Also, when removing the spare tire 101, the spare tire 101 should have a low height.

Next, the operation of the vehicle carrier 1 will be described along with daily work procedures.

For example, if you want to collect a broken vehicle that has stopped on the road, drive the vehicle carrier 1 in the state shown in Figure 1 and head to the site.

That is, the lift frame 3 is set in a horizontal posture, and the slide body 6 (loading section) is lifted onto the lift frame 3. A tread 8 provided on the slide body 6 is in an upright state. The bumper body 14 is in the running position. That is, the bumper body 14 is fixed at a height close to the vehicle body 4 (loading platform).

When the vehicle arrives at the site, the rear warning device 33 provided on the slide body 6 (loading platform) and the rear warning member 56 attached to the bumper body 14 are turned on. Specifically, the rear warning device 33 and the rear warning member 56 are both hazard lamps, and the rear warning device 33 and the rear warning member 56 are illuminated yellow at a constant interval between the irradiation surfaces 33a and 56a. It is an electric light.

[0088] When the state at this time is observed from the rear of the vehicle carrier 1, it is as shown in FIG. That is, the rear warning device 33 provided on the slide body 6 is in a state where the tread 8 is obstructing and it is difficult to check the rear force, but the rear warning member 56 attached to the bumper body 14 has an irradiation surface 56a on the ground. Therefore, the vehicle approaching from behind can know the existence of the vehicle carrier 1.

In other words, when driving or stopping before starting work,

HB (maximum height of tread) ≥HFL (height of rear warning device)

The rear warning device 33 is in a state where it is difficult to confirm from behind because the tread 8 is in the way,

HRL (height of rear warning member) <HR (minimum ground clearance of loading platform)

Therefore, the rear warning member 56 attached to the bumper body 14 should be clearly visible. Can do.

In this way, when the vehicle transport vehicle 1 is also projected in the rear direction, the tread plate 8 covers the rear warning device 33, but the rear warning member 56 is located at a position lower than the rear end of the slide body 6 (loading portion). Because there is a rear force, it is possible to view it in orthographic view.

Then, the driver of the vehicle transport vehicle 1 drives the lifting device 80 of the bumper device 10 by a predetermined operation, and moves the bumper body 14 to the working position as shown in FIG. That is, the bumper main body 14 is lowered, and the bumper main body 14 is moved to a position close to the ground.

At this time, in this embodiment, since the bumper body 14 is moved using the parallel link, the posture of the bumper body 14 does not change during the movement, even after the movement. Therefore, the irradiation surface 56a of the rear warning member 56 attached to the bumper body 14 is the same as the position of the traveling position (substantially perpendicular to the ground) during and after movement, and always faces backward. Yes.

[0090] Since the irradiation surface 56a of the rear warning member 56 always faces backward, even if any obstacle collides during movement, the glass or the like of the irradiation surface 56a does not break.

The state at this time is observed from the rear force as shown in Fig. 2 (b). That is, the rear warning device 33 provided on the slide body 6 is still in a state where the tread 8 is still in the way and it is difficult to check the rear force. The rear warning member 56 attached to the bumper body 14 clearly recognizes. A vehicle that can approach the vehicle and has a rear force can know the existence of the vehicle carrier 1

Therefore, even in this state

HB (maximum height of tread) ≥HFL (height of rear warning device)

The rear warning device 33 is in a state where it is difficult to confirm from the rear because the tread 8 is in the way, but HRL (height of the rear warning member) <HR (minimum ground level of the loading platform) The rear warning member 56 attached to the bumper body 14 can be clearly seen. In other words, when the vehicle transport vehicle 1 is viewed in the normal projection, the tread plate 8 covers the rear warning device 33, but the rear warning member 56 can also perform the rear projection in the normal projection.

Subsequently, as shown in FIG. 3, the slide body 6 (loading section) is moved to the vehicle rear end side, and the lift frame 3 is tilted. When the rear force is also observed at this time, as shown in FIG. 3 (b), the lift frame 3 tilts and the front side of the slide body 6 (loading section) is lifted. As a result, the height of the rear warning device 33 attached to the slide body 6 (loading platform) exceeds the height of the tread plate 8, and the rear warning device 33 can be confirmed from the rear.

In the state of FIG. 3, the angle of the lift frame 3 does not reach the maximum angle, and there is a gap between the slide body 6 and the ground. Therefore, the rear warning member 56 attached to the bumper main body 14 can also visually recognize the backward force.

[0093] When the inclination of the lift frame 3 further advances and the rear end of the slide body 6 (loading part) lands as shown in FIG. 4, the rear warning member 56 attached to the bumper body 14 as shown in FIG. Although it is hidden, the rear warning device 33 attached to the slide body 6 (loading section) can be confirmed from the rear.

[0094] After that, as shown in FIG. 5, the slide body 6 (loading platform) is caused to land on the ground at the rear end and slide down the slide body 6. In this state, the slide body 6 is inclined and attached to the slide body 6. Further, the rear warning device 33 is in a state where the height of the rear warning device 33 exceeds the height of the tread board 8, so that the rear warning device 33 can also check the rear force.

[0095] Then, after the entire area of the slide body 6 (loading section) is landed on the ground as shown in FIG. 6, the tread plate 8 is placed in a horizontal posture as shown in FIG.

When the tread plate 8 is set in the horizontal position, there is no obstacle blocking the rear warning device 33 attached to the slide body 6, so that the rear warning device 33 can also check the rear force.

Next, an operation procedure when the tire of the vehicle transport vehicle 1 is punctured will be described.

If the tire of the vehicle carrier 1 punctures while driving, stop the vehicle carrier 1 on the shoulder as usual. Of course, the rear warning device 33 provided on the slide body 6 and the rear warning member 56 attached to the bumper body 14 are turned on to inform the following vehicle that the vehicle carrier 1 is stopped.

Then, the spare tire 101 attached to the lifting device 80 of the bumper device 10 is lowered.

Specifically, an operation of moving the bumper body 14 to the working position is performed, and the spare tire 101 is lowered together with the bumper body 14. Then, a bolt (not shown) is removed, and the spare tire 101 is removed from the lifting device 80.

Subsequently, although not shown, the vehicle is lifted with a jack or the like, the punctured tire is removed, the spare tire is attached to the axle, and the tire is replaced.

Then, the punctured tire is attached to the lifting device 80. Thereafter, the lifting / lowering device 80 is activated to raise the bumper body 14 to the traveling position and raise the punctured tire together with the bumper body 14.

The general configuration and operational effects of the transport vehicle of the present invention have been described above. Next, a specific configuration of the bumper device 10 and the lifting device 80 that is a component of the bumper device 10 will be described.

The bumper device 10 is attached to the rear end portion of the vehicle transport vehicle 1 described above. In actual design, the bumper device 10 has a three-dimensional link mechanism as described later. To facilitate understanding of the force, the bumper device 10 has a flat skeleton diagram.

10 structures will be described.

[0099] (Embodiment 1)

8 and 9 are front views of the bumper device of the first embodiment of the present invention, FIG. 8 shows a state when the bumper is in the working position, and FIG. 9 shows the bumper in the traveling position. Shows the state at the time.

10 to 12 are skeleton diagrams of the bumper device according to the first embodiment of the first embodiment of the present invention. FIG. 10 shows a state where the bumper is in the working position, and FIG. 11 shows the bumper. Fig. 12 shows the situation when the position force during work reaches the running position, and Fig. 12 shows the situation when the bumper is in the running position.

[0100] The bumper device 10 according to the present embodiment includes a lifting device 80, a bumper body 14, and a spare tire 101. The lifting device 80 includes a bumper drive unit 11, a reverse rotation prevention mechanism unit 12, and a power unit 13. A bumper body 14 and a mouth 19 are attached to the bumper drive 11 of the lifting device 80. A spare tire 101 is attached to the bumper drive unit 11.

The bumper body 14 is made by pressing steel in the same manner as a known one, and is attached with a reflector plate, a zado lamp, and the like. Roller 19 is a freely rotating rubber wheel It is.

In the present embodiment, the bumper drive unit 11 of the lifting device 80 is a chain mechanism that includes a swing arm 15, a bumper arm 16, an auxiliary connecting member 17, and a fixing member 18. In other words, the lifting device 80 has a link mechanism including the swing arm 15, the bumper arm 16, the auxiliary connecting member 17, and the fixing member 18. This link mechanism actually has a three-dimensional structure as will be described later.

The fixing member 18 constituting the link mechanism is a member welded to the rear portion of the subframe 7 of the track 1 and is integral with the subframe 7 of the track 1 and does not move relative thereto.

The bumper arm 16 has a bumper body 14 attached to the tip thereof. A spare tire 101 is fixed to the bumper arm 16 with bolts (not shown).

The swing arm 15 is attached to the fixed member 18 by a pin 20, and the proximal end side of the swing arm 15 is swingable with respect to the fixed member 18.

Further, the base end portion of the bumper arm 16 is connected to the tip end side of the swing arm 15 via a pin 21.

The swing arm 15 is provided with a grounding member 24. The grounding member 24 is integrally attached to the swing arm 15, and when the bumper device 10 is in a working posture as shown in FIGS. 8 and 10, the column portion 24a of the grounding member 24 has a substantially vertical posture. Become.

An auxiliary connecting member 17 is attached between the middle part of the bumper arm 16 and the fixing member 18. The coupling between the bumper arm 16 and the auxiliary coupling member 17 and the coupling between the fixing member 18 and the auxiliary coupling member 17 are both by pins 22 and 23.

[0103] In the bumper drive unit 11 of the lifting device 80, the swing arm 15, the part of the bumper arm 16, the auxiliary connecting member 17 and the fixing member 18 form a substantially parallel link. That is, the length between the pins 20 and 21 of the swing arm 15 is equal to the length between the pins 22 and 23 of the auxiliary connecting member 17 which is an opposing element.

The length between the pins 20 and 23 of the fixing member 18 is equal to the length between the pins 21 and 22 of the bumper arm 16 which is an opposing element. The line connecting the pins 20 and 23 of the fixing member 18 is parallel to the vehicle body 4 of the truck 1, and when the truck 1 is stopped on the horizontal plane, the fixing member 18 The line connecting pins 20 and 23 is horizontal.

In the present embodiment, as described above, since the swing arm 15, a part of the bumper arm 16, the auxiliary connecting member 17 and the fixing member 18 form a substantially parallel link, the bumper driving unit 11 When one of the elements is exercised, the other elements exercise limitedly. Further, as described above, the bumper drive unit 11 forms a parallel link, and the pin 20, 23 of the fixing member 18 is parallel to the vehicle body 4 of the truck 1, so that the pin 2 1 of the bumper arm 16 is , 22 always move in parallel with the vehicle body 4 of the truck 1.

[0105] When the swing arm 15 is suspended as shown in FIGS. 8 and 10, the position of the bumper arm 16 is the lower side in the vertical direction and the front side in the front-back direction of the track 1 On the side.

When the inclination posture of the swing arm 15 is changed, the bumper arm 16 gradually rises and moves backward in the front-rear direction of the track 1.

Next, the reverse rotation prevention mechanism unit 12 and the power unit 13 of the lifting device 80 will be described.

The reverse rotation prevention mechanism unit 12 includes a rotating member 25 and a connecting link 26. The rotating member 25 is attached to the subframe 7 of the track 1 by a pin 28 and rotates around the pin 28. The shape of the rotating member 25 is substantially triangular, and a fan-shaped concave portion 37 is provided on one side. There is a small recess 36 on the long side. The recess 36 functions as an engaging portion, and as described later, is in a position where it can engage with a part of the slide body 6 (loading portion) during traveling.

The power unit 13 has a hydraulic cylinder 27 (drive source) as a main member.

In the present embodiment, the connecting link 26 is provided between the rotating member 25 of the reverse rotation preventing mechanism unit 12 and the bumper driving unit 11, and the rotating member 25 includes the hydraulic cylinder 2 of the power unit 13. 7 rods 30 are connected!

That is, the base end portion of the connecting link 26 is rotatably connected to a part of the rotating member 25 via the pin 29, and the tip end portion of the connecting link 26 swings the bumper driving unit 11 via the pin 31. It is connected to the middle part of arm 15.

The hydraulic cylinder 27 is attached to the subframe 7 of the track 1 through the pin 32 on the cylinder end side, and the tip of the rod 30 is attached to the rotating member 25 through the pin 35. It is attached.

Here, the bumper device 10 of the present embodiment is characterized by the mounting position relationship and the mounting angle between the rotating member 25 and other members.

That is, in the bumper device 10 of the present embodiment, the rotating member 25 is rotated by expanding and contracting the rod 30 of the hydraulic cylinder 27, and the connecting link 26 is moved according to the rotation of the rotating member 25, so that the swing arm The force that moves the bumper drive unit 11 while changing the inclination angle of 15 to move the bumper body 14 and the spare tire 101. While the bumper body 14 and the spare tire 101 are moving in series, The moving member 25 rotates beyond the thought point.

[0109] Next, the attachment positions of the rotating member 25 and other members will be described.

Fig. 13 to Fig. 15 are skeleton diagrams in which the part of the rotating member 25 is enlarged in the skeleton diagram of the bumper device shown in Fig. 10 to Fig. 12, and Fig. 13 is when the bumper is in the working position. Fig. 14 shows the state in which the bumper is in the middle of reaching the working position, and Fig. 15 shows the state when the bumper is in the running position.

[0110] Briefly, the bumper body 14 is moved to the working position (Fig. 13) when it is virtually divided into upper and lower areas A and B with the rotation center (pin) 28 of the rotating member 25 as a boundary. In some cases, the position of the pin 35 on the hydraulic cylinder 27 side and the position of the pin 29 on the swing arm 15 side are in different regions. That is, at this time, the position of the pin 35 on the hydraulic cylinder 27 side is in the region B below the rotation center (pin) 28, and the pin 29 on the swing arm 15 side is higher than the rotation center (pin) 28. It is in upper area A.

Therefore, when the hydraulic cylinder 27 contracts, torque is applied to the rotating member 25 in the direction of arrow E (the direction of arrow E may be referred to as the positive direction in the description). In addition, the reaction force from the bumper body 14 side (the connecting link 26) applies a torque in the direction opposite to the arrow E direction to the rotating member 25.

More specifically, the vector a generated when the hydraulic cylinder 27 contracts passes the lower region B with the rotation center (pin) 28 as a boundary when the vector a is extended. On the other hand, the reaction force vector b from the bumper body 14 and the spare tire 101 side passes through the region A on the opposite side with the rotation center (pin) 28 as a boundary. In this way, hydraulic cylinder 27 is generated Since the vector a and the reaction force vector b from the spare tire 101 side pass through opposite regions with the rotation center (pin) 28 as a boundary, the reaction force from the spare tire 101 side is applied to the rotating member 25. Torque in the direction opposite to the direction of arrow E is applied.

[0112] On the other hand, when the bumper body 14 and the spare tire 101 are in the travel position, the relationship described above is lost, and the position of the pin 35 on the hydraulic cylinder 27 side and the swing arm 15 as shown in FIG. The position of the pin 29 on the side is in the same area. That is, at this time, the position of the pin 35 on the hydraulic cylinder 27 side is in the region B below the rotation center (pin) 28, and the pin 29 on the swing arm 15 side is also from the rotation center (pin) 28. Is in the lower region B.

[0113] More precisely, the vector a generated when the hydraulic cylinder 27 contracts passes the lower region B with the rotation center (pin) 28 as a boundary when it is extended, and the bumper body 14 The reaction force vector b from the spare tire 101 side also passes through the same region B with the rotation center (pin) 28 as a boundary. In this way, the solid cylinder a generated by the hydraulic cylinder 27 and the reaction force vector b from the spare tire 101 side pass through the same region with the rotation center (pin) 28 as a boundary. This reaction force gives the rotating member 25 a torque in the same direction as the arrow E direction.

[0114] During this time, the rotating member 25 passes the thought point. The thought point is that the rotating member 25 can rotate both forward and backward with respect to the force that receives the side force of the bumper body 14 and the spare tire 101.

The thought point is the position where the position of the pin 29 on the swing arm 15 side reaches the vicinity of the height of the rotation center (pin) 28 as shown in FIG. More precisely, the extended line of the connecting link 26 passes through the rotation center (pin) 28. In other words, in practice, the connecting link 26 changes in both the position and the inclination angle, so the exact thought point cannot be specified only by the position of the pin 29, and the position of the pin 29 moves up and down and further swings. While the tilting posture of the arm 15 changes discontinuously, the extension line force of the articulated link 26 is the position that passes through the rotation center (pin) 28.

Next, main operations of the bumper device 10 of the present embodiment will be described.

8 and 10 show the state when the bumper is in the working position as described above. In this state, the bumper body 14 is located at the lowest position in the up-down direction, and is on the front side in the front-rear direction of the track 1. Bumper body 14 and spare tire 101 Is in the orthographic projection plane of the body of track 1 and at a position near the ground. Therefore, the bumper body 14 and the spare tire 101 do not get in the way when loading or unloading vehicles (conveyed items).

At this time, the posture of the swing arm 15 is in a suspended state. That is, the pin 21 on the tip side is in the lower position. As described above, since the swing arm 15 rotates about the pin 20, when the swing arm 15 is in the vertical posture, the tip-side pin 21 is located at the lowest position. The rotating member 25 is in a posture in which a triangular corner 36a is sunk in the vehicle body 4.

[0116] Turning to the power unit 13, the hydraulic cylinder 27 is in a state where the rod 30 is extended. This state force is also applied when the bumper body 14 and the spare tire 101 are moved to the travel position. The rod 30 of the cylinder 27 is contracted. As a result, the rotating member 25 rotates about the pin 28 in the direction of arrow E.

[0117] When the rotating member 25 rotates in the direction of arrow E, the connecting link 26 connected to the rotating member 25 is pushed out to the bumper body 14 side (vehicle rear side).

Therefore, the connecting link 26 pushes the middle part of the swing arm 15 toward the bumper main body 14 side (rear side of the vehicle) and tilts the swing arm 15.

Here, as described above, the swing arm 15 forms a parallel link together with the bumper arm 16, the auxiliary connecting member 17 and the fixing member 18, so that the auxiliary connecting member 17 tilts as the swing arm 15 tilts. The bumper arm 16 is pushed out to the rear of the track 1. The bumper arm 16 rises in the height direction. Along with this, the spare tire 101 also rises.

As a result, the bumper main body 14 protrudes toward the rear end side of the truck 1, and the height of the bumper main body 14 reaches the position at the time of traveling as soon as it approaches the vicinity of the vehicle body 4. Specifically, the bumper body 14 protrudes further rearward from the rear end portion of the vehicle in the vehicle length direction, and stops near the vehicle body 4 in the height direction.

The height of the spare tire 101 also approaches the vicinity of the vehicle body 4. However, the position of the spare timer 101 in the front-rear direction is within the orthographic projection plane of the slide body 6.

Further, during these series of operations, the rotating member 25 rotates beyond the thought point. When the rod 30 of the hydraulic cylinder 27 is contracted, the bumper body 14 and the spare tire 101 have reached positions suitable for traveling.

[0119] In normal work, the vehicle starts with track 1 running.

Here, the load applied to the bumper body 14 and the spare tire 101 during traveling is a vertical load due to heavy force or the like, and a horizontal load due to inertia during traveling or braking. In any case, these loads act so that the position force during traveling of the bumper body 14 and the spare tire 101 is also directed toward the working position. More specifically, the traveling force acts in the direction in which the swing arm 15 is in the hanging posture, and acts in the direction to push the connecting link 26 back to the hydraulic cylinder 27 side.

[0120] Here, when the positional relationship between the rotating member 25 and the other members at the traveling position is confirmed again, the rotating member 25 exceeds the thought point while the working position force reaches the traveling position. When the bumper body 14 and the spare tire 101 are in the travel position, the position of the pin 35 on the hydraulic cylinder 27 side and the position of the pin 29 on the swing arm 15 side are in the same region (B). More precisely, the vector of the articulated link 26 passes through the lower region B with the rotation center (pin) 28 as a boundary, and the rotation center ( Pin) Pass through lower area B with 28 as the boundary. Therefore, this force acts in the direction in which the hydraulic cylinder 27 contracts. However, when the bumper body 14 and the spare tire 101 are in the running position, the rod 30 of the hydraulic cylinder 27 is already contracted, so that the hydraulic cylinder 27 cannot be contracted any further and the rotating member 25 is locked. It becomes a state.

Therefore, the bumper body 14 and the spare tire 101 do not move.

[0121] When loading a vehicle (conveyed material) or when the tire is punctured and replaced with a spare tire 101, it is attached to the rear warning device 33 and the bumper body 14 attached to the rear of the cab 9. Stop track 1 with the noise lamp lit. Then, hydraulic pressure is supplied to the hydraulic cylinder 27 to extend the rod 30.

As a result, the rotating member 25 rotates in the direction opposite to the arrow E contrary to the previous operation, and the connecting link 26 moves by the rotation of the rotating member 25. Then, the swing arm 15 changes its horizontal posture to a vertical posture, and the bumper body 14 and the spare tire 101 are lowered. Here, in the present embodiment, the swing arm 15, a part of the bumper arm 16, the auxiliary connecting member 17 and the fixing member 18 form a substantially parallel link, and the pin of the fixing member 18 Since the space between the vehicle 20 and the vehicle 23 is parallel to the vehicle body 4 of the truck 1, the bumper body 14 and the spare tire 101 always move in a horizontal posture. For this reason, the rear warning member 56 attached to the bumper main body 14 such as the blade and the zard lamp always maintains a posture facing backward. For this reason, another vehicle with rear force can confirm the presence of truck 1 (vehicle carrier).

[0123] After that, in the same manner as a known vehicle transporter, the slide body 6 (loading part) is moved to the rear end side of the vehicle, the lift frame 3 is inclined, and the slide body 6 (loading part) is further moved to the rear side of the vehicle To land on the ground.

When the entire bottom surface of the slide body 6 (loading platform) has landed, place the tread plate 8 in a horizontal position as shown in Fig. 7 and carry in or out the vehicle (conveyed object).

Next, detailed operations of the bumper device 10 of the present embodiment will be described.

In the bumper device 10 of the present embodiment, the grounding member 24 is provided on the swing arm 15 as described above. The grounding member 24 is a columnar member, and is attached to a part of the swing arm 15. The grounding member 24 moves integrally with the swing arm 15, and when the swing arm 15 is in the suspended state, the grounding member 24 has a posture facing the top-and-bottom direction. The lower end of the ground member 24 is positioned below the leading end of the swing arm 15 when the swing arm 15 is in the suspended state.

[0125] The function of the ground contact member 24 is to prevent the front wheel of the truck 1 from floating.

That is, the truck (vehicle transport vehicle) 1 is for loading a vehicle having a considerable weight, and the slide body 6 (loading platform) moves backward. As a result, local concentrated loads may be applied to the vehicle body 4 of the truck 1. If the position where the concentrated load is applied is between the front and rear wheel trains, there is no major problem. However, if a load is applied further rearward than the rear train wheels, the overall force of the truck will be similar to that of a seesaw. In some cases, the wheel in the rear row swings around the fulcrum and the wheel in the front row rises.

Therefore, in the present invention, the grounding member 24 is provided on the swing arm 15 of the bumper device 10, and when the load is applied and the rear wheel side sinks, the grounding member 24 is landed on the ground to support the load. And

That is, in the bumper device 10 of the present embodiment, the bumper device 10 is made to function in the case of unloading work and the bumper body 14 is moved downward and forward. At this time, the oscillating arm 15 is oriented in the vertical direction. Therefore, the grounding member 24 is also in a downward state. When the truck 1 receives a load and the vehicle body 4 sinks, the ground member 24 moves down together with the swing arm 15 and comes into contact with the ground. As a result, a load acting on the vehicle body 4 is directly applied to the grounding member 24 and prevents the vehicle body 4 from descending.

In particular, in the present embodiment, the grounding member 24 is attached to the swing arm 15, and the swing arm 15 is in a suspended position during loading and unloading work. Can be directly borne as a compression load. That is, the load received by the ground member 24 is along the column portion 24a, and there is little eccentric component. Therefore, the grounding member 24 can withstand high loads that are difficult to buckle. In addition, since the mounting portion of the swing arm 15 is highly rigid and can be easily structured, a large load can be supported.

In the present embodiment, a special shape is adopted for the rotating member 25.

In other words, the essential function of the rotating member 25 is to transmit the force of the hydraulic cylinder 27 to the bumper drive unit 11 and limit the force in the reverse direction. Any shape may be used. For example, it may be a disk shape, a square shape, or a polygonal shape such as a star shape.

The reason why the triangular rotating member 25 is used in the bumper device 10 of this embodiment is to prevent the vehicle loading device 2 from moving when the truck 1 is traveling.

That is, as described above, the vehicle loading device 2 has the slide body 6 (loading section) attached to the lift frame 3, and the slide body 6 moves during work.

On the other hand, the slide body 6 (loading section) is fixed so as not to move by a locking means (not shown) during traveling.

[0128] While doing so. In the unlikely event that this locking means breaks down, the slide body 6 (loading section) moves while the vehicle is moving and the slide body 6 falls off, which could lead to a major accident.

Therefore, in the present embodiment, the corner 36a of the rotating member 25 is projected to the vehicle body 4 side (upper side) during traveling. The slide body 6 (loading platform) has a floor surface made of eta-spanned metal, punching metal, or the like, but an aggregate 90 (FIG. 9) for supporting the floor is provided on the back side. In the bumper device 10 of the present embodiment, the posture of the rotating member 25 is a posture with the corner 36a up and the concave portion 36 is in a forward posture at the time of traveling. Therefore, even if the slide body 6 (loading part) (not shown) is unlocked and the slide body 6 (loading part) tries to move backward, the aggregate 90 provided on the back side collides with the recess 36 and the slide body 6 Stop (loading section). Therefore, even if the locking means of the slide body 6 (loading part) breaks down, there is no risk that the slide body 6 (loading part) will drop by 4 forces.

[0129] Further, during the operation, the force for lowering the bumper main body 14 as described above, the rotating member 25 rotates at that time, and the corner 36a sinks downward. Therefore, the corner 36a of the rotating member 25 does not get in the way when moving the slide body 6 (loading part).

[0130] (Embodiment 2)

Next, a second embodiment of the invention will be described.

Since the difference between the second embodiment described below and the first embodiment described above is only the bumper drive unit, the description will focus on the differences from the previous embodiment, and the same parts will be described. Are denoted by the same reference numerals in the drawings, and detailed description thereof is omitted.

16 to 18 are skeleton diagrams of the bumper device according to the second embodiment of the present invention. FIG. 16 shows a state when the bumper is in the working position, and FIG. 17 shows that the bumper travels from the working position. Fig. 18 shows the state when the bumper is in the running position.

FIG. 19 is a skeleton diagram of the bumper device according to the second embodiment of the present invention, and shows the behavior when it collides with an obstacle. FIG. 20 is a cross-sectional view of an auxiliary connecting member employed in the bumper device of the second embodiment. FIG. 21 is a front view showing a modified example of the auxiliary connecting member.

[0131] In the bumper device 10 of the first embodiment described above, the bumper drive unit 11 of the lifting device 80 is configured by parallel links. That is, in the previous embodiment, the bumper drive unit 11 is a limited chain, and each element always translates with respect to the opposing element.

On the other hand, the bumper device 40 of the second embodiment described below is a bumper device. This is a motion with 16 degrees of freedom. In this embodiment as well, the spare tire 101 is fixed to the bumper arm 16 with a bolt or the like (not shown). In the bumper device 40 of the present embodiment, the auxiliary connecting member 41 has elasticity. More specifically, the auxiliary connecting member 41 has a degree of freedom only in the contracting direction, prevents the bumper arm 16 and the fixing member 18 from being over a certain distance, and shortens the distance between them. It is acceptable.

[0132] The specific structure of the auxiliary connecting member 41 is as shown in FIG. The auxiliary connecting member 41 is divided into an upper side shaft 44 and a lower side shaft 47, and a shock absorber 43 is provided at an intermediate portion thereof. The shock absorber 43 includes a housing 45 and a panel 52.

A guide member 46 having a hole 46 a is provided inside the housing 45 of the shock absorber 43, and a lid 42 is attached to the lower opening of the housing 45. The lid 42 has a hole 42a.

The lower shaft 47 is partially formed with a screw 49, and a nut 48 is screwed to the screw 49. A sliding ring 50 and a sliding force lever 51 are slidably mounted on the lower shaft 47.

[0133] The upper shaft 44 is attached to the upper side of the housing 45 of the shock absorber 43.

Further, the lower force of the louver 45 is inserted into the upper end portion of the lower shaft 47. That is, the upper end portion of the lower shaft 47 passes through the hole 42 a of the lid 42 of the housing 45. Further, the upper end portion of the lower shaft 47 passes through the hole 46 a of the guide member 46 and protrudes upward from the guide member 46. A known C-ring 54 is attached to the upper end of the lower shaft 47. Therefore, the lower shaft 47 does not fall out of the shock absorber 43.

In addition, the above-described sliding ring 50 and sliding force lever 51 are attached to a portion of the lower shaft 47 between the guide member 46 and the lid 42. The sliding ring 50 is slidable with respect to the lower shaft 47. Here, the sliding ring 50 has a larger diameter than the hole 42a of the lid 42. The sliding collar 51 has a smaller diameter than the hole 42a of the lid 42. Therefore, the sliding collar 51 can slide over the inside and outside of the housing 45. The sliding ring 50 stops in the housing 45. The sliding collar 51 is in contact with the nut 48. The nut 48 is screwed with a screw 49 formed on the lower shaft 47.

Therefore, when the nut 48 is rotated to move the position of the nut 48, the sliding collar 51 and the sliding ring 50 are moved.

A panel 52 is provided between the sliding ring 50 and the guide member 46.

Therefore, the auxiliary connecting member 41 keeps the length of the shock absorber 43 constant by the panel 52 pressing the sliding ring 50 of the lower shaft 47 against the lid 42 when no load is applied.

When a tensile force is applied to the auxiliary connecting member 41, the C-ring 54 contacts the guide member 46 of the housing 45, so that the auxiliary connecting member 41 does not extend beyond a certain length.

On the other hand, when the auxiliary connecting member 41 is compressed, the sliding ring 50 moves toward the guide member 46 against the pressing force of the panel 52, and the entire length is reduced.

Further, if the nut 48 is rotated to move the position of the nut 48 and the sliding ring 50 is moved, the entire length of the panel 52 is expanded and contracted when there is no load, and the pressing force of the panel 52 can be adjusted.

In the auxiliary connecting member 41, the tip of the upper shaft 44 is attached to the fixing member 18 via the pin 23. The tip of the lower shaft 47 of the auxiliary connecting member 41 is connected to the middle part of the bumper arm 16 via the pin 22.

[0138] The bumper device 40 of the present embodiment deals with a case where there is an obstacle in the lower portion, and has a function of preventing the device from being destroyed. That is, when the vehicle is loaded, as described above, hydraulic pressure is supplied to the hydraulic cylinder 27 of the bumper device 40 to extend the rod 30. As a result, the swing arm 15 also changes the horizontal posture force to the vertical posture, and the bumper Arm 16 descends. At this time, the load (gravity load) of the bumper arm 16 is applied downward, and the auxiliary connecting member 41 is applied with a tensile force. Therefore, the auxiliary connecting member 41 is in the most extended state, and the swing arm 15, a part of the bumper arm 16, the auxiliary connecting member 41, and the fixing member 18 form a substantially parallel link. Therefore, the bumper arm 16 always descends in a horizontal position. [0139] If there are stones, car stops, curbs, etc. on the ground surface, the bumper body 14 or bumper arm 16 may hit them. Here, in the bumper device 40 of the present embodiment, since the auxiliary connecting member 41 has a degree of freedom in the contraction direction, the bumper body 14 or the bumper arm 16 escapes upward.

That is, the bumper device 40 of the present embodiment has a function of escaping upward when the bumper body 14 or the like receives a lower force. Therefore, even if there is an obstacle at the lowering position of the bumper, the bumper device 40 will not be damaged!

[0140] Further, in the bumper device 40 of the present embodiment, since the shock absorber 43 is provided in the auxiliary connecting member 41 that is a part of the bumper drive unit 11, the vibration of the bumper device 40 during the traveling of the vehicle can be reduced. Can do. That is, when the vehicle travels, the force that moves the bumper device 40 to the travel position as shown in FIG. 18 is a cantilever support state during travel. The drive unit 11 is turned up and down. However, in this embodiment, since the shock absorber 43 is provided in a part of the bumper drive unit 11, the vertical movement of the vehicle body 4 is not directly transmitted to the bumper body 14, and the bumper drive unit 11 is stable. To do.

The strength of the shock absorber 43 can be arbitrarily adjusted by changing the pressing force of the panel 52 by rotating the nut 48.

Note that in the bumper device 40 of the present embodiment, the grounding member 24 is provided on the swing arm 15. In the bumper device 40 of the present embodiment, as described above, when the bumper main body 14 or the like receives a force from the lower part, they have a function of escaping upward, but even if a load is applied to the grounding member 24, the grounding member 24 will not run away. That is, in this embodiment, the bumper arm 16 is a force having a degree of freedom in the swinging direction. The grounding member 24 is attached to the swinging arm 15 instead of the swinging arm 15 extending and contracting. Can support the load. Therefore, when a local concentrated load is applied to the vehicle body 4 of the truck 1, this load can be supported, and the front wheel can be prevented from lifting.

[0142] Further, in the present embodiment, a higher-performance shock absorber such as one having a force damper exemplifying the shock absorber 43 having only the panel 52 may be used.

Conversely, the shock absorber 43 may be omitted. That is, in this embodiment, the auxiliary connecting portion Instead of the force exemplified as the material 41 having the panel 52 built therein, a wire material 53 such as a wire or rope as shown in FIG. 21 may be used. A chain or a chain may be used instead of a wire.

In short, any member capable of withstanding the tensile force and having a degree of freedom in the shrinking direction can be replaced with the auxiliary connecting member 41 of the second embodiment.

In addition, a wire, a chain, or the like is a member that exhibits a “function to escape upward force”.

FIG. 22 is a modified example of the bumper device according to the second embodiment of the present invention, and is a skeleton diagram when a wire is employed as the auxiliary connecting member, showing a state in which the bumper body is in the working position. FIG. 23 is a modified example of the bumper device according to the second embodiment of the present invention, and is a skeleton diagram in the case where a wire is employed as an auxiliary connecting member, and shows the behavior when it collides with an obstacle.

[0143] Also in the bumper device 40 'shown in Figs. 22 and 23, the wire rod 53 as the auxiliary connecting member is a member that can withstand the tensile force, and therefore can support the load (gravity load) of the bumper arm 16. When the bumper drive unit 11 is operated, the swing arm 15, a part of the bumper arm 16, the auxiliary connecting member (wire 53), and the fixing member 18 form a substantially parallel link. Therefore, the bumper arm 16 always descends while maintaining a horizontal posture.

[0144] When the bumper body 14 is lowered when it hits a curb or the like, the wire 53 is loosened as shown in Fig. 23 and the bumper body 14 or the bumper arm 16 escapes upward. Therefore, even if there is an obstacle at the destination of the bumper body 14, the bumper device 40 ′ is not damaged.

[0145] In this embodiment as well, the bumper body 14 and the spare tire 101 do not move during traveling. In other words, the bumper body 14 is moved to a predetermined position when the vehicle is driven. In this embodiment, the bumper body 14 is moved upward and rearward, and the rotating member is moved from the working position to the traveling position. Since 25 exceeds the thought point, the rotating member 25 is locked. For this reason, the bumper body 14 and the spare tire 101 do not move due to vibration during traveling.

[Embodiment 3]

Next, a third embodiment of the present invention will be described.

Also in the third embodiment, the difference from the first embodiment described above is that the bumper Since only the drive unit is described, the description will focus on differences from the previous embodiment, and the same parts will be denoted by the same reference numerals in the drawings, and detailed description thereof will be omitted.

FIGS. 24 to 26 are skeleton diagrams of the bumper device according to the third embodiment of the present invention. FIG. 24 shows the state when the bumper body is in the working position, and FIG. 20 shows the bumper body from the working position. Fig. 26 shows the state when the bumper body is in the running position.

FIG. 27 is a perspective view of the engaging means employed in the third embodiment of the present invention. 28 to 30 are explanatory views showing the operation of the bumper device according to the third embodiment of the present invention. FIG. 28 shows the state when the bumper body is in the working position, and FIG. 29 shows the bumper body. The working position force is also shown on the way to the running position, and Fig. 30 shows the condition when the bumper body is in the running position.

[0147] In the bumper device 10 of the first embodiment described above, the bumper drive unit 11 is configured by a parallel link, but in the third embodiment, the parallel link is omitted.

That is, the bumper device 55 of the present embodiment has no equivalent to the auxiliary connecting member. Instead of this, an engaging means 57 is provided.

[0148] The engaging means 57 is constituted by the end face of the swing arm 15 as shown in Figs.

. That is, the swing arm 15 and the bumper arm 16 are both made of square pipes as shown in FIG. The swing arm 15 and the bumper arm 16 are connected by a hinge member 58 at the corners on the bent side.

Therefore, the bumper arm 16 is a force that can swing until the posture force at right angles to the swing arm 15 reaches a substantially linear posture.

The parts facing 58 are brought into contact with each other, and the square pipes are brought into contact with each other. Therefore, the bumper arm 16 cannot have an angle wider than 180 · in relation to the swing arm 15.

In this embodiment as well, the spare tire 101 is fixed to the bumper arm 16 by a bolt or the like not shown.

[0149] Next, the operation of the bumper device 55 of the present embodiment will be described. Also in the bumper device 55 of the present embodiment, the hydraulic cylinder 27 of the power unit 13 is expanded and contracted to expand the bumper device 55. The damper body 14 and the spare tire 101 are moved up and down. The operations of the power unit 13 and the reverse rotation prevention mechanism unit 12 are the same as those in the previous embodiment.

24 and 28 show a state where the bumper body 14 and the spare tire 101 are in the working position as described above. The posture of the swing arm 15 at this time is in a suspended state, and the lower end of the swing arm 15 is in the vicinity of the ground.

On the other hand, the roller 19 near the tip of the bumper arm 16 is grounded. Since the swing arm 15 and the bumper arm 16 are coupled by the hinge member 58, the swing arm 15 and the bumper arm 16 are joined at an angle of about 90 ·. Further, as described above, the front end portion of the bumper arm 16 (the rear end side with respect to the vehicle) is grounded to the ground by the roller 19, and the swinging arm 15 is also suspended in the hinge member 58 on the other end side. The lower end of the swing arm 15 is in the vicinity of the ground. Therefore, both ends of the bumper arm 16 are near the ground surface, and the bumper arm 16 is in a substantially horizontal posture.

Then, as a result of the rotation member 25 rotating in the direction of arrow E, the connecting link 26 6 force connected thereto is pushed out toward the bumper body 14 side.

Therefore, the connecting link 26 pushes the middle part of the swing arm 15 toward the bumper body 14 and tilts the swing arm 15.

That is, the swing arm 15 swings while drawing an arc locus around the pin 20, and the lower end of the swing arm 15 moves and rises toward the rear of the vehicle.

[0151] Since the lower end of the swing arm 15 is coupled by the bumper arm 16 and the hinge member 58 as described above, the vehicle front side end portion of the bumper arm 16 is directed toward the rear of the vehicle. Move and rise.

However, since the bumper arm 16 can swing with respect to the swing arm 15, the other end side (the vehicle rear side) of the bumper arm 16 moves to the vehicle rear side while being grounded. Here, in this embodiment, since the roller 19 is attached to the other end side (rear side of the vehicle) of the bumper arm 16, it will not be damaged even if the bumper arm 16 moves.

[0152] The angle between the swing arm 15 and the bumper arm 16 depends on the tilting posture of the swing arm 15

, Go. Then, when the swing arm 15 is further inclined and the swing arm 15 and the bumper arm 16 are in a straight line state, the end surfaces of the swing arm 15 and the bumper arm 16 are brought into contact with each other as shown in FIGS. That is, the end surface of the swing arm 15 that is the engagement means 57 and the end surface of the bumper arm 16 are in contact with each other, the opening degree of the swing arm 15 and the bumper arm 16 is restricted, and the space between the swing arm 15 and the bumper arm 16 is It will be in a state that does not open any more.

[0153] When the swing arm 15 further inclines, the roller 19 on the vehicle rear side of the bumper arm 16 leaves the ground surface, and the bumper arm 16 is lifted as shown in Figs. Further, the bumper main body 14 protrudes toward the rear end side of the truck 1, and the height approaches the vicinity of the vehicle body 4.

In normal work, start with truck 1 running. Also in this embodiment, while the bumper body 14 moves upward and rearward and the working position force reaches the running position, the rotating member 25 exceeds the thought point, so the rotating member 25 is in the locked state. Become. For this reason, the bumper body 14 and the spare tire 101 do not move due to vibration during running.

[0154] When the vehicle is loaded, the truck 1 is stopped and the hydraulic pressure is supplied to the hydraulic cylinder 27 to extend the mouth 30.

As a result, the rotating member 25 rotates in the direction opposite to the arrow E contrary to the previous operation, and the connecting link 26 moves by the rotation of the rotating member 25. As a result, the swing arm 15 changes from the horizontal posture to the vertical posture, and the bumper body 14 and the spare tire 101 reach the working position.

Specifically, the swing arm 15 moves so as to have a horizontal posture force and a vertical posture, and the bumper arm 16 swings integrally with the swing arm 15 in the first place. As the swinging proceeds and the roller 19 provided on the bumper arm 16 is installed, the roller 19 side of the bumper arm 16 cannot be lowered any further! Therefore, the bumper arm 16 and the swinging arm 15 are hinge members 58. The part of power is bent.

When the swing arm 15 further approaches the vertical posture, the bumper arm 16 is pulled toward the front side of the vehicle. Since the roller 19 is attached to the other end side (rear side of the vehicle) of the bumper arm 16, the bumper arm 16 is not damaged even when the bumper arm 16 is pulled toward the front side of the vehicle.

[0156] The bumper device 55 of the present embodiment also has a function of escaping upward when the bumper body 14 or the like is also subjected to a lower force. Therefore, there is an obstacle at the bumper ’s descent The bumper will not be damaged.

That is, the bumper arm 16 has a degree of freedom in the direction of reducing the opening angle with respect to the swing arm 15. Therefore, when the bumper arm 16 is lowered, if there are stones, car stoppers, curbs, etc. on the ground surface, the force that the bumper body 14 or bumper arm 16 hits against the bumper arm 16 swings around the hinge member 58 and the bumper body 14 side escapes upward.

[0157] In this embodiment, the end face of the swing arm 15 is made to function as the engaging means 57. However, the function of the engaging means can be exhibited by bringing the other portion into contact with the bumper arm 16. . Further, another member can be attached to the swing arm to function as the engaging means.

Example

The bumper device of the present invention has been described above using the skeleton diagram, but the bumper device actually mounted on the vehicle transporter has a three-dimensional structure in order to ensure rigidity. FIG. 31 is a perspective view of the bumper device according to the embodiment of the present invention. FIG. 32 is an exploded perspective view in which the main part of the bumper device shown in FIG. 31 is drawn out. FIG. 33 is a cross-sectional view of a spare tire carrier employed in the bumper device of FIG.

The bumper device shown in FIGS. 31 and 32 has the structure shown in the second embodiment (FIGS. 16 to 18), and the auxiliary connecting member 41 is provided with a shock absorber 43 in the middle.

[0160] The bumper body 14 is made of a steel pipe (round pipe). In the present embodiment, the bumper body 14 has a steel pipe 60 arranged horizontally, and two rear warning members 61 (hazard lamp units) attached to the upper part. The rear warning member 61 is provided with a known hazard lamp, reflector or the like. The roller 19 is a rubber wheel that rotates freely and is attached to both ends of the steel pipe 60.

As described above, the bumper driving unit 11 is a chain mechanism that includes the swing arm 15, the bumper arm 16, the auxiliary connecting member 41, and the fixing member 18. Further, in this embodiment, the swing arm 15, the bumper arm 16, the auxiliary connecting member 41 and the fixing member 18 are all constituted by two sets of members, which are partially combined to exhibit a three-dimensional structure. ing.

[0162] That is, the fixing member 18 is attached to the subframe 7 of the truck 1 via the loading platform 62. In this embodiment, two sets are provided. Specifically, the fixing member 18 is provided as a set at both ends of the loading platform 62 and is constituted by two plates 63 respectively.

[0163] The bumper arm 16 is constituted by two square pipes 65, and the bumper main body 14 described above is attached to both ends. In addition, two crosspieces 104 are provided on the upper surface of the bumper arm 16. For this reason, in this embodiment, the frame 105 is constituted by the two square knobs 65 and the bumper main body 14, and the two crosspieces 104 described above are provided on the upper surface of the frame 105. The

[0164] A spare tire carrier 108 is mounted on the crosspiece member 104. The spare charge carrier 108 has a known structure, and holds the spare charge 101 by winding up a chain 112 (FIG. 33).

That is, the spare tire carrier 108 includes a chain drum and a gear mechanism 118 inside. A handle engagement portion 120 is provided on the outer surface of the spare tire carrier 108, and a handle can be engaged with the handle engagement portion 120 to drive the internal gear mechanism 118 (not shown). A hook (not shown) is provided at the tip of the chain 112. The procedure for attaching the spare tire 101 is well known. The hook is engaged with the wheel of the tire, the handle is engaged with the handle engaging portion 120, the chain 112 is rolled up by turning the handle, and the spare tire 101 is It is in a state where it is pressed against the crosspiece 104.

In the present embodiment, the spare tire 101 is arranged in the frame body 105 constituted by the two square pipes 65 and the bumper body 14. For this reason, in the present embodiment, the spare tire 101 has few portions from which the upper surface side force of the frame 105 protrudes. That is, in this embodiment, the spare tire 101 is accommodated in a space constituted by the two square pipes 65 and the bumper body 14, and there is no useless space.

[0166] The swing arm 15 has two main members 66 made of square pipes, and the two main members 66 are connected by two crosspieces 67 and 68. The two bars 67 and 68 are joined together by a reinforcing member 69.

The ground member 24 is attached to the lower beam 68. Two sets of grounding members 24 are also provided in this embodiment. When the bumper device 40 is in the working position, the grounding member 24 takes a vertical posture as shown in FIGS. The grounding member 24 is also made of square pipe A grounding plate 71 is attached to the tip.

Further, the upper crosspiece 67 is provided with two continuous member mounting portions 75.

[0167] In the swing arm 15, the two main members 66 are each attached to the fixed member 18 by the pin 20, and the proximal end side of the main member 66 of the swing arm 15 is fixed to the fixed member 18. Can be shaken.

A proximal end portion of the bumper arm 16 is connected to the distal end side of the swing arm 15 via a hinge member 70.

In addition, auxiliary connecting members 41 are attached between the middle portions of the respective square pipes of the bumper arm 16 and the left and right fixing members 18. The coupling between the bumper arm 16 and the auxiliary coupling member 41 and the coupling between the fixing member 18 and the auxiliary coupling member 41 are all made by the pins 22 and 23 as described above.

[0169] The bumper drive unit 11 has a structure in which two parallel links are three-dimensionally joined. That is, the main member 66 of the swing arm 15 and one square pipe 65 of the bumper arm 16, one fixing member 18 and one auxiliary connecting member 41 form a substantially parallel link. Two sets of this combination are provided.

The two parallel links are joined by the two bars 67 and 68 connecting the main members 66 of the swing arm 15 and the bumper body 14 connecting the two square pipes 65 of the bumper arm 16, and as a result. It has a three-dimensional structure.

[0170] Next, the reverse rotation prevention mechanism unit 12 and the power unit 13 will be described.

As described above, the reverse rotation preventing mechanism 12 is constituted by the rotating member 25 and the connecting link 26, and these are also three-dimensional structures. That is, the rotating member 25 is configured by arranging plate bodies 72 having the same shape at intervals. The plate bodies 72 are all substantially triangular. The connecting link 26 is composed of two steel strips.

[0171] Each plate 72 constituting the rotating member 25 has a substantially triangular shape as described above, and a through hole 73 is provided at the center, and a shaft (pin) 28 is inserted into the through hole 73. Yes. Further, both ends of the shaft (pin) 28 are attached to the subframe 7 of the track 1 via the support member 74. Therefore, the rotating member 25 can rotate about the shaft (pin) 28. Further, two shafts (pins) 29 and 35 are passed between the plate bodies 72 of the reverse rotation preventing mechanism 12.

The base end portion of the connecting link 26 is pivotally connected via a pin 29, and the tip ends of the two band irons constituting the connecting link 26 are connected to the connecting member of the swing arm 15 via the pin 31. Connected to mounting part 75.

In addition, as shown in FIG. 8, the cylinder end side of the hydraulic cylinder 27 is attached to the subframe 7 of the track 1 via the pin 32, and the tip of the rod 30 is attached to the rotating member 25 via the pin 35. Being

[0172] The positional relationship and operation of each member in the bumper device 40 of the present embodiment are the same as those in the above-described embodiment. By extending and contracting the hydraulic cylinder 27, the bumper body 14 and the spare tire 101 move in parallel, and work is performed. Move appropriately between the hour position and the running position. In addition, the posture of the bumper body 14 when moving is always constant, and the hazard lamp unit 61 always faces backward.

The bumper device 40 of this embodiment is practical with high rigidity.

[0173] In the above-described embodiment, the spare tire 101 is fixed by the spare tire carrier 108 of the type wound with a chain. However, as shown in Figs. 34 to 36, the spare tire 101 may be fixed simply by a bolt. .

FIG. 34 is a perspective view of a bumper device according to another embodiment of the present invention. FIG. 35 is an exploded perspective view in which the main part of the bumper device shown in FIG. 34 is extracted. Figure 36 is an explanatory diagram showing a relationship between the bumper arm and the spare tire bumper device shown in FIG. 34, _(a

) Is a perspective view thereof, and (b) is a side view thereof in the A direction. FIGS. 37 and 38 are explanatory views showing the relationship between the bumper arm and the spare tire of the bumper device in still another embodiment. FIG. 37 (a) is a perspective view thereof, and FIG. It is a direction side view. FIG. 39 is a perspective view of a bumper device according to yet another embodiment of the present invention.

In the bumper unit 121 shown in FIG. 34, two crosspieces 103 are fixed to the lower surface of the bumper arm 16 by a weld screw structure or the like. The crosspiece member 103 is provided with a hole 103a through which the bolt 106 passes.

[0176] Then, the spare tire 101 is placed on the upper surface of the two crosspiece members 103, and the bolt 106 Spare tire 101 is fixed to crosspiece member 103. That is, the bolt 106 passes through the spare tire 101 and the hole 103a of the crosspiece member 103, and a nut (not shown) is screwed on the opposite side, whereby the spare tire 101 is fixed to the crosspiece member 103. In the present embodiment, since the periphery of the spare tire 101 is surrounded by the frame body 105, the spare tire 101 is prevented from falling even if the bolt 106 may come off during traveling.

In the bumper device 121 shown in FIG. 34, the force in which the spare tire 101 is arranged in the frame 105 constituted by the two square pipes 65 and the bumper main body 14 is shown in FIG. Spare tire 101 may be arranged under 05, or as shown in FIG. 38, crosspiece member 103 may be grounded to the upper part of bumper arm 16 and spare tire 101 may be attached to the upper surface of frame 105.

[0178] In the embodiment described above, the crosspiece member 103 that holds the spare tire 101 is a cross-shaped crosspiece 110 as shown in FIG. 39 exemplifying that the left and right square pipes 65 of the bumper arm 16 are coupled. May be. In the embodiment shown in FIG. 39, one end of the crosspiece 110 is fixed to a crosspiece 68 integral with the swing arm 15 by a hinge 111.

[0179] In any of the above-described embodiments, the force by which the rear warning member 56, the hazard lamp unit 61, and the bumper main body 14 are moved by the link mechanism, as shown in Fig. 40, a structure using a rack and pinion, The rear warning member 56, the hazard lamp unit 61, and the bumper body 14 may be moved up and down directly in a structure using a cylinder as shown in FIG.

[0180] Further, a force that increases the number of parts may be provided independently by a device that moves the rear warning member 56 and the hazard lamp unit 61. That is, in the above-described embodiments, the force used to move the rear warning member 56, the hazard lamp unit 61, and the bumper main body 14 with one moving device. You can move it independently.

Conversely, the rear warning member 56 and the hazard lamp unit 61 may be moved in conjunction with the driving of the slide body 6 (loading part) and the like.

In the above-described embodiment, an example in which the rear warning member 56 and the hazard lamp unit 61 are mounted on the vehicle transport vehicle 1 is shown. Of course, the rear warning member 56 and the hazard lamp unit 61 described above are mounted on another transport vehicle. May be installed. For example, container trucks, This is achieved by mounting the rear warning member 56 and the hazard lamp unit 61 in the above-described embodiment on a puka or the like.

[0181] In the above-described embodiment, the example in which the present invention is applied to a vehicle transport vehicle in which the entire surface of the slide body 6 lands on the ground has been described. However, only the rear end portion of the slide body 6 is inclined. The present invention can also be applied to a vehicle that lands on the ground or a transportation vehicle in which the slide body 6 simply tilts and does not land on any part of the ground. That is, the present invention can also be applied to a vehicle carrier having a structure in which the slide body 6 is stopped in an inclined posture and the vehicle is loaded and unloaded in this state. Furthermore, the present invention can be widely applied to vehicles such as dump trucks that are not limited to vehicle transport vehicles. A configuration in which the bumper body 14 is moved up and down directly by a hydraulic cylinder can also be adopted. In the above-described embodiment, the lifting device 80 includes a driving source that is independent of the driving source that moves the loading platform, but the driving source of the lifting device 80 and the driving source of the loading platform may be shared. ,. That is, the lifting device 80 may move in conjunction with the lifting and lowering of the gantry.

[0182] The present invention shows an example in which a spare tire is installed in a lifting device that lifts and lowers a bumper. However, the spare tire may be installed in another part of the vehicle carrier. In other words, the lifting device raises and lowers the bumper so that at least one of the rear warning device installed at the front of the vehicle body and the rear warning member installed at the rear of the vehicle body can be seen from another vehicle approaching the rear force. You can configure the transport vehicle (vehicle transport vehicle) to make it happen!

Industrial applicability

[0183] The present invention can be used for a transport vehicle having a function of moving a part of a cargo bed part or lowering a part of the cargo bed part to the ground like a vehicle carrier, a container truck, a dump truck or the like. .

Claims

The scope of the claims

[1] A transport vehicle having a loading platform that can move relative to the vehicle body is equipped with a rear warning member that informs the presence of the transport vehicle by lightning to vehicles approaching from the rear. It is possible to change the position of the member to a traveling position suitable for traveling and a working position suitable for carrying out a predetermined work by moving the loading platform. A transport vehicle characterized by maintaining a directed posture.

[2] The loading platform can be moved to a position where it is loaded and transported on the vehicle body and a position when performing a predetermined work, and the rear warning member is positioned before the loading platform reaches a position where the predetermined work is performed. The transport vehicle according to claim 1, wherein the transport vehicle moves to a working position.

[3] The transport vehicle according to claim 1 or 2, wherein the height of the working position of the rear warning member is near the ground.

4. A moving mechanism for moving a rear warning member is provided, wherein the moving mechanism is a parallel link mechanism, and the rear warning member is attached to the moving mechanism in a posture directed rearward. 4. The transport vehicle according to any one of 3 to 3.

[5] The auxiliary warning member for notifying the presence of the transport vehicle by lightning to the vehicle approaching from the rear side is attached to the front half side of the vehicle main body or the cargo bed portion. 4. The transport vehicle according to any one of 4.

[6] A tread is provided at the loading platform, the tread is at the rear end of the loading platform and can be changed between a standing posture and a flat posture, and the loading platform is tiltable, and the tread is The ground height changes with the inclination of the loading platform, and when the vehicle body is viewed from the rear force in a positive projection view, the rear warning member projects the vehicle body from the rear projection view when the tread covers the auxiliary warning member. 6. The transport vehicle according to claim 5, wherein the transport vehicle is possible.

7. The transport vehicle according to any one of claims 1 to 6, further comprising a moving mechanism that moves a rear warning member, wherein a bumper body is attached to the moving mechanism.

[8] A moving mechanism that moves the rear warning member and the bumper main body, the moving mechanism including a swing arm, a bumper arm that holds the bumper main body, an auxiliary connecting member, and a fixing member. When the rear warning member is moved from the working position to the traveling position, the swinging arm is suspended and the posture force is moved toward the horizontal posture. The auxiliary connecting member is moved in parallel with the movement of the swinging arm, and the bumper arm is lifted while maintaining a substantially horizontal posture. The transport vehicle described in 1.

[9] The moving mechanism is provided with a transmission mechanism that transmits the drive source and the movement of the drive source to the bumper body to move the bumper body, and at least one of the elements constituting the transmission mechanism responds to the force received from the bumper body side. 7. There is a thought point that can cause two kinds of movements, and when the bumper body is moved from the working position to the running position, the element moves beyond the thought point. Any of the transport vehicles listed here.

10. The transport vehicle according to any one of claims 1 to 9, wherein the transport vehicle is a vehicle transport vehicle, and the loading platform can be lowered to the ground.

[11] A transport vehicle including a vehicle body, a bumper attached to the vehicle body, and a loading platform that is movable relative to the vehicle body, includes a lifting device that lifts and lowers the bumper, and a spare tire is attached to the lifting device. A transport vehicle characterized by

12. The transport vehicle according to claim 11, wherein the lifting device includes an arm that holds a bumper, and a spare tire is attached to the arm.

[13] The transport vehicle according to claim 11, wherein the lifting device includes two arms for holding a bumper, and a spare tire is attached between the arms.

[14] The elevating device or the bumper includes a frame, and the frame is located near the bottom of the vehicle body when the bumper is in the raised position, and a spare tire is attached to the frame. The transport vehicle according to any one of claims 11 to 13.

[15] The lifting device has a link mechanism, and the elements constituting the link mechanism have a three-dimensional framework.

A spare tire is attached to the frame.

3!

[16] The lifting device includes a drive source and a transmission mechanism that transmits the movement of the drive source to the bumper to move the bumper, and at least one of the elements constituting the transmission mechanism responds to the force received by the bumper side cage. 16. There is a thought point that can cause two kinds of movements, and the element moves beyond the thought point when the bumper is moved to the working position. Carriage vehicle according to Crab.

17. The transport vehicle according to any one of claims 11 to 16, wherein the elevating device has a drive source independent of a drive source force for moving the loading platform.

18. The transport vehicle according to claim 17, wherein the element having a thought point is a rotating member that rotates about a rotation axis.

[19] The lifting device has a chain mechanism composed of a swing arm, a bumper arm that holds the bumper body, an auxiliary connecting member, and a fixing member, and moves the bumper body to the working position and the running position. When the swing arm is moved, the swinging arm is moved toward the horizontal posture, the auxiliary connecting member moves in parallel with the movement of the swing arm, and the bumper arm is maintained in a substantially horizontal posture. The transport vehicle according to any one of claims 11 to 18, wherein the transport vehicle rises in a state.

[20] A bumper device provided in a transport vehicle having a loading platform that is movable with respect to a vehicle body, the bumper device including a bumper body and a moving mechanism that moves the bumper body, and the bumper body is allowed to travel. The moving mechanism can be changed between a suitable traveling position and a working position suitable for a predetermined work, and the moving mechanism transmits a driving source and a movement of the driving source to the bumper body to move the bumper body. At least one of the elements that make up the transmission mechanism has a conceivable point where two types of movement can occur with respect to the force received by the bumper body side force, and the bumper body moves to the working position. The bumper device for a transport vehicle, wherein the element moves beyond the thought point when the vehicle is moved.

21. The bumper device for a transport vehicle according to claim 20, wherein the element having a thought point is a rotating member that rotates about a rotation axis.

[22] The drive source is a cylinder, and the bumper body moves from the working position to the traveling position by contracting or extending the cylinder, and when the bumper body is in the traveling position, the cylinder acts on the bumper body side force. The bumper device for a transport vehicle according to claim 20 or 21, wherein the direction of the force to be received is the same as a cylinder expansion / contraction direction when the bumper body is moved from the working position to the traveling position.

[23] The moving mechanism has a chain mechanism composed of a swinging arm, a bumper arm that holds the bumper body, an auxiliary connecting member, and a fixing member, and moves the bumper body to the working position and the traveling position. The posture force with the swing arm hanging down when The auxiliary connecting member is moved in parallel with the movement of the swinging arm, and the bumper arm is lifted while maintaining a substantially horizontal posture. The bumper device for a transport vehicle according to any one of 22 above.

[24] The auxiliary connecting member according to claim 23, wherein the auxiliary connecting member prevents the distance between the bumper arm and the fixing member from being a predetermined distance or more and allows the distance between the two to be shortened. Bumper device for transport vehicles.

[25] The moving mechanism includes a swing arm and a bumper arm that holds the bumper body, and the swing arm and the bumper arm are swingably coupled via a pin, and the angle of both is within a certain range. When the bumper body is moved to the working position and the running position, the swinging arm moves toward the suspended posture force horizontal posture. When the moving arm and bumper arm are at a certain angle, the engaging means engages to move the bumper arm together with the swing arm, and the bumper body moves to the working position. When swinging, the swing arm moves downward, while the bumper arm lands on the ground, the angle between the swing arm and the bumper arm changes, and the engagement of the engagement means is released. It is characterized by The bumper device for a transport vehicle according to any one of claims 20 to 24.

26. The bumper device for a transport vehicle according to any one of claims 23 to 25, wherein the bumper body or the bumper arm has a function of escaping upward when receiving a lower force.

27. The bumper device for a transport vehicle according to claim 23, wherein the bumper arm or the bumper body has a mouth.

[28] The bumper device for a transport vehicle according to any one of claims 23 to 27, wherein the swing arm is provided with a grounding member.

[29] The vehicle to which the bumper device is attached is a freight vehicle, and has a cargo bed portion that moves on the vehicle body. The movement mechanism of the bumper device has a part of the engaging portion, and the bumper body is in a traveling position. The engaging portion is in a position where it can engage with the loading platform portion, and when the bumper body is in the working position, the engaging portion cannot engage with the loading platform portion and is in a position. Item 20. The bumper device for a transport vehicle according to any one of Items 20 to 28.