JP3625696B2 - Industrial vehicle - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an industrial vehicle having wheels that can be raised and lowered, such as a large traveling carriage.
[0002]
[Prior art]
Conventionally, as this type of industrial vehicle, for example, configurations shown in FIGS. 9 and 10 are provided. That is, the traveling carriage 1 which is an example of an industrial vehicle is provided with driving units 3 and 4 at both front and rear end portions of the vehicle body 2, and covers the upper portions of the driving units 3 and 4. Is provided with a loading platform 5. A pair of left and right wheel devices 10 are provided at a plurality of front and rear locations (for example, front and rear four locations) on the lower side of the vehicle body 2.
[0003]
Here, the wheel device 10 is of a turning type, and a turning member 12 that can turn around the longitudinal axis 11 with respect to the vehicle body 2 side, a bracket body 13 having an upper end fixed to the turning member 12, and the bracket An arm body 15 connected to the lower end of the body 13 via a lateral shaft 14, an axle 16 provided on the arm body 15, a wheel 17 and a wheel drive unit 18 provided on the axle 16, and a bracket body 13 and a cylinder device 19 provided between the arm body 15 and the like.
[0004]
The pallet body (support frame body) 30 supported by the loading platform 5 includes a pallet portion 30a on which an object (loading object) 33 can be placed, and a plurality of leg portions 30b suspended from the pallet portion 30a. And a locking hole 31 is formed in a predetermined plurality of locations of the pallet portion 30a so as to penetrate in the vertical direction. On the loading platform 5 side, a hydraulic or pneumatic cylinder device 35 is disposed corresponding to each locked hole 31, and the upward pinton rod 36 is connected to the locked hole 31. A stopper 37 detachable from below is provided.
[0005]
According to such a conventional configuration, the traveling cart 1 travels forward, for example, by driving on the driving unit 3, and travels backward by driving on the driving unit 4. At that time, the traveling carriage 1 can be turned left or right by turning the turning member 12 of the wheel device 10 forward and backward by a turning drive device (not shown).
In front and rear running including such turning, the cylinder device 19 of the wheel device 10 is contracted to swing the arm body 15 upward about the lateral axis 14, as shown by the phantom line in FIG. 10. By raising the wheel 17 via 16, the loading platform 5 side can be brought into the lowered position. In this state, as shown in FIG. 9, the carriage 5 is positioned below the pallet part 30a by running the carriage 1 in the pallet body 30 on which the article 33 is placed (or empty). Let
[0006]
Next, contrary to the above, the cylinder device 19 of the wheel device 10 is extended to swing the arm body 15 downward, and the wheel 17 is moved downward via the axle 16, as shown by the solid line in FIG. 10. Furthermore, the pallet body 30 can be lifted by raising the loading platform 5 side by the ground reaction force. The pallet body 30 can be positioned by extending the cylinder 35 group to raise the stopper 37 group and engaging the locked hole 31 formed in the pallet part 30a from below.
[0007]
Thereafter, as the traveling carriage 1 travels as described above, the transported object 33 can be transported. At that time, the stopper 37 group prevents the pallet body 30 from being displaced due to braking or vibration.
[0008]
[Problems to be solved by the invention]
However, according to the above-described conventional configuration, the cylinder 35 group for moving the stopper 37 group up and down is necessary, and the configuration including the piping group is complicated and the control is also complicated.
Accordingly, an object of the present invention is to provide an industrial vehicle capable of preventing a pallet body from shifting while omitting a cylinder and a pipe.
[0009]
[Means for Solving the Problems]
To achieve the above object, an industrial vehicle according to claim 1, wherein among the present invention, together with a driving portion and the loading platform are provided on the vehicle body, vehicle wheels device provided at a plurality of positions before and after in the body of the lower side These wheel devices are composed of an arm body provided to be swingable up and down with respect to the vehicle body side, a wheel provided on the arm body side, and a vertical swing device interlocked with the arm body. The pallet body can be supported by an industrial vehicle, and the loading platform side is provided with a locking body that can be moved up and down with respect to the locked portion on the pallet body side. The locking body is configured to be moved up and down in conjunction with the vertical swinging of the arm body in one wheel device.
[0010]
Therefore, according to the invention of claim 1, the industrial vehicle can travel forward or backward by driving in the driving section. Then, the vertical swing device is operated to swing the arm body upward, and the wheel can be lifted to lower the loading platform, and the vertical swing device is reversely operated to swing the arm body downward. By lowering the wheel, the pallet body can be lifted by raising the loading platform by the ground reaction force.
[0011]
At this time, the locking body can be raised together with the swinging of the arm body to automatically engage the locked portion. Therefore, when the industrial vehicle is driven, the locking body can prevent the pallet body from being displaced due to braking or vibration. When the arm body is swung upward to lower the loading platform, the locking body can be automatically lowered and detached from the locked portion.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described based on FIGS. 1 to 6 as a state where the embodiment is adopted in a front and rear driving section type traveling carriage. In the embodiment, the same or substantially the same components as those of the above-described conventional example (FIGS. 9 and 10) are denoted by the same reference numerals, and details thereof are omitted.
[0013]
That is, 1 is a traveling carriage as an example of an industrial vehicle, 2 is a vehicle body, 3 is a driving unit, 4 is a driving unit, 5 is a loading platform, 10 is a turning wheel device, 11 is a vertical axis, 12 is a turning member, 13 is a bracket body, 14 is a lateral axis, 15 is an arm body, 16 is an axle, 17 is a wheel, 18 is a wheel drive unit, 19 is a cylinder device as an example of a vertical swing device, 30 is a pallet body, and 30a is A pallet part, 30b is a leg part, 31 is a to-be-latched hole which is an example of a to-be-latched part, 33 shows a to-be-conveyed object, respectively.
[0014]
The to-be-latched holes 31 are rectangular holes, and are formed at four locations on the pallet portion 30a. On the loading platform 5 side, a stopper (an example of a locking body) 20 that can be freely engaged and disengaged with respect to the locked hole 31 is provided so as to be movable up and down. That is, in the vicinity of four (at least one) wheel devices 10 in the group of wheel devices 10, rectangular through holes 7 are formed on the cargo bed 5 side, and rectangular cylinders are formed on the inner surface side of the rectangular through holes 7. A slidable contact guide body 8 is constructed.
[0015]
The stopper 20 is in the shape of a rectangular rod and can be moved up and down by being guided by the sliding contact guide body 8. A connecting body 21 is suspended from the lower surface of the stopper 20. Is provided. At this time, the raising / lowering guide of the stopper 20 by the sliding contact guide body 8 is configured so that the stopper 20 is not dropped by the dead weight on the stopper 20 side due to frictional resistance due to the material of the sliding contact guide body 8 or the like.
[0016]
The rectangular cross section of the locked hole 31 is formed larger than the rectangular cross section of the stopper 20. And the said raising / lowering passive body 22 is C-shaped material shape, Comprising: The open part is provided toward the wheel apparatus 10. As shown in FIG.
The four wheel devices (at least one) near the stopper 20 are configured such that the stopper 20 is moved up and down in conjunction with the vertical swing of the arm body 15. That is, a link-like transmission body 23 is integrated with the arm body 15, and an end portion of the transmission body 23 protrudes outward from the arm body 15, and the transmission section 24 provided at the protruding end portion moves up and down. The passive body 22 is fitted.
[0017]
The operation in the above embodiment will be described below.
The traveling cart 1 travels forward, for example, by driving into the driving unit 3, and travels backward by driving in the driving unit 4. At that time, the traveling carriage 1 can be turned left or right by turning the turning member 12 of the wheel device 10 forward and backward by a turning drive device (not shown). In front and rear running including such turning, in each wheel device 10, the rotation of the wheel driving unit 18 is transmitted to the axle 16.
[0018]
Then, the cylinder device 19 of the wheel device 10 is contracted to swing the arm body 15 upward around the lateral axis 14, and through the axle 16 as shown in FIG. 1 (a) and FIG. By raising the wheel 17, the loading platform 5 side can be set to the lowered position. At this time, the transmission body 23 is swung together with the arm body 15, and the transmission section 24 that moves downward lowers the stopper 20 via the ascending / descending passive body 22 and the coupling body 21, thereby automatically stopping the stopper 20. Has been lowered.
[0019]
In this state, as shown in FIG. 1A and FIG. 3, the traveling carriage 1 is caused to travel in a portal-shaped pallet body 30 on which the object 33 is placed (or empty). The loading platform 5 is stopped below the pallet portion 30a. The stop of the traveling carriage 1 is performed with the stopper 20 group opposed to the locked hole 31 group from below, and in this case, the opposing positioning is performed on the rectangular cross section of the locked hole 31 by the stopper 20. By making it large with respect to the rectangular cross section, it can be done easily and quickly.
[0020]
Next, contrary to the above, the cylinder device 19 of the wheel device 10 is extended to swing each arm body 15 downward, and through the axle 16 as shown in FIG. By lowering the wheel 17, the pallet body 30 can be lifted by raising the loading platform 5 side by the ground reaction force. At this time, the transmission body 23 is swung together with the arm body 15, and the stopper 20 is raised by the rising transmission portion 24 via the elevating passive body 22 and the coupling body 21, and thus the locked hole 31. The stopper 20 can be automatically engaged with the stopper 20.
[0021]
Thereafter, the traveling object 1 can be transported by traveling the traveling carriage 1 as described above. At that time, the stopper 20 group can prevent the pallet body 30 from being displaced due to braking or vibration. After transporting to a predetermined place in this way, in the same manner as described above, the cylinder device 19 of the wheel device 10 is contracted to raise the wheel 17, and the loading platform 5 side is set to the lowered position. The pallet body 30 can be landed at a predetermined place, and the stopper 20 can be automatically lowered and detached from the locked hole 31.
[0022]
Note that, regardless of the stopper operating position and the stopper non-operating position of the stopper 20 group, the transmission unit 24 may be disengaged laterally with respect to the ascending / descending passive body 22 during forward / reverse turning during traveling. Is not lowered by its own weight due to the frictional resistance caused by the material of the sliding contact guide body 8 or the like, and its elevation position is maintained.
Next, another embodiment of the present invention will be described with reference to FIGS.
[0023]
That is, one side of the stopper 20 in the front-rear direction is formed on the inclined outer surface 20a that becomes narrower toward the upper side, and the locked hole 31 is formed on the inclined inner surface 31a corresponding to the inclined outer surface 20a. In this case, when the pair of front and rear stoppers 20 are viewed, the inclined outer surface 20a is disposed so as to face outward in the front and rear directions.
According to this other embodiment, when the stopper 20 is raised in conjunction with the vertical swing of the arm body 15, first, the width of the upper portion of the stopper 20 is narrower than the large opening portion of the lower portion of the locked hole 31. When the portions are fitted, the positioning of the stopper 20 group facing the locked hole 31 group can be easily and quickly performed. As the fitting proceeds, the inclined outer surface 20a comes into contact with the inclined inner surface 31a, so that the stopper 20 acts like a wedge, so that the pallet body 30 can be positioned while correcting the position.
[0024]
In the above-described embodiment, the traveling carriage 1 is shown in which the driving units 3 and 4 are provided at the front and rear end portions of the vehicle body 2, respectively. There may be.
In the above-described embodiment, the traveling carriage 1 in which the cargo bed 5 is provided on the upper portion of the vehicle body 2 in a state of covering the upper portions of both the driving units 3 and 4 is shown. The form in which the part of the loading platform 5 is not located above may be used.
[0025]
In the above-described embodiment, the transmission unit 24 may be disengaged laterally with respect to the lifting and lowering passive body 22 during forward / reverse turning while traveling. For example, the lifting and lowering passive body 22 is connected to the transmission unit 24. The fitting state can always be maintained when the arc shape or the like that can cover the movement in the turning direction is used. In such a case, the sliding contact guide body 8 for obtaining the frictional resistance can be omitted.
[0026]
In the above-described embodiment, the all-turning wheel device 10 is shown. However, this may be all a non-turning wheel device, and, for example, two places in the central portion are non-turning type. The wheel device may be of a type in which the swivel wheel device 10 is provided at two locations on the front and rear sides. It should be noted that when the stopper 20 and the like are disposed corresponding to the non-turning wheel device, the transmission unit 24 does not come off sideways with respect to the ascending / descending passive body 22 during forward / reverse turning during traveling. Become.
[0027]
In the embodiment described above, the locked hole 31 is shown as the locked portion, but this may be a locked recess.
In the above-described embodiment, the stoppers 20 are disposed at four locations. However, the stoppers 20 may be disposed at one location or a plurality of locations other than the four locations.
[0028]
【The invention's effect】
According to the first aspect of the present invention described above, the loading platform can be raised and lowered by operating the vertical swing device to swing the arm body up and down and moving the wheels up and down. Therefore, when the wheel is lowered, the pallet body can be lifted by raising the loading platform by the ground reaction force. Then, the locking body can be raised together with the arm body so that it can automatically engage with the locked portion, thereby preventing the pallet body from shifting with respect to the loading platform due to braking or vibration. Can be prevented by the body. Further, when the arm body is swung upward to lower the loading platform, the locking body can be automatically lowered and detached from the locked portion. In this way, the pallet body can be prevented from shifting while omitting the cylinder and piping, and the configuration and control can be simplified.
[Brief description of the drawings]
FIG. 1 shows an example of an embodiment of the present invention, and is a partially cutaway side view of an industrial vehicle, in which (a) is when the cargo bed is lowered and (b) is when the cargo bed is raised.
FIG. 2 is a plan view of the industrial vehicle.
FIG. 3 is a front view of the industrial vehicle.
FIG. 4 is a plan view of a main part of the industrial vehicle.
FIG. 5 is a partially cutaway side view of the wheel device portion in the same industrial vehicle when the loading platform is lowered.
FIG. 6 is a partially cutaway side view of the wheel device portion of the same industrial vehicle when the loading platform is raised.
FIG. 7 is a plan view of an industrial vehicle showing another embodiment of the present invention.
FIG. 8 is a partially cutaway side view of the main part of the industrial vehicle.
FIG. 9 is a partially cutaway side view of an industrial vehicle showing a conventional example.
FIG. 10 is a partially cutaway side view of a wheel device portion in the industrial vehicle.
[Explanation of symbols]
1 Traveling cart (industrial vehicle)
2 Car body 3 Driving section 4 Driving section 5 Loading platform 8 Sliding contact guide body 10 Wheel device 12 Rotating member 13 Bracket body 14 Horizontal shaft 15 Arm body 17 Wheel 18 Wheel drive section 19 Cylinder device (vertical swing device)
20 Stopper (locking body)
20a Inclined outer surface 22 Elevating passive body 23 Transmission body 24 Transmission section 30 Pallet body 30a Pallet section 30b Leg section 31 Locked hole (locked section)
31a Inclined inner surface

Claims (1)

With a driving portion and the loading platform are provided on the vehicle body, vehicle wheels device is provided at a plurality of positions before and after in the body of the lower side, these wheel device, an arm member provided to freely swing vertically relative to the vehicle body side An industrial vehicle comprising a wheel provided on the arm body side and a vertical swinging device interlocked with the arm body, and capable of supporting the pallet body by a cargo bed. A locking body that can be freely engaged and disengaged with respect to the locking portion is provided so as to freely move up and down, and the locking body moves up and down in conjunction with the vertical swing of the arm body in at least one wheel device in the wheel device group. An industrial vehicle characterized in that it is configured as described above.

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