JPH057872Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a large tire transport vehicle used for transporting large tires used in aircraft and large vehicles.

Conventional Technology Large tires used on aircraft and large vehicles are quite heavy, so when replacing them, a hand-held lifter as shown in Figure 10 is used to transport the large tires. .

This lifter has front and rear casters 103 and 10
A roller 1 is mounted on a pair of arms 101, 101 of a planar U-shaped truck frame 100 having a
02, 102 are rotatably supported, and a large tire W is placed across these rollers 102, 102.

The rear caster 104 has a master cylinder 105 attached to its axle, and the body of the master cylinder 105 is connected to the rear bracket 107 of the bogie frame 100 via a link 106. The upper end is engaged with a support seat 109 on the rear upper side of the truck frame 100.

A plunger pump 111 operated by a lever 110 is attached to the master cylinder 105. By repeatedly operating this lever 110 in the up and down direction, the plunger pump 111 is operated, and the master cylinder 105 is activated. By stretching, the truck frame 100 can be raised to a forward tilted state using the front casters 103 as a fulcrum. This similar structure is shown in, for example, Japanese Utility Model Application No. 57-174499.

Problems to be Solved by the Invention Large tires W must be transported by hand using a lifter, and the rollers 102, 102
It has been pointed out that loading and unloading of the large tires W onto the top has to be done manually, which requires a great deal of labor and time, resulting in poor work efficiency.

Therefore, in order to save labor and improve work efficiency in transporting large tires, loading and unloading large tires, the applicant has previously filed Japanese Patent Application No. 60-193153 (Japanese Unexamined Patent Publication No. 62-56299). We are proposing a self-propelled large tire transport vehicle.

This parallel link mechanism is installed on the rear end of a cart that is self-propelled by an engine or motor and rotates horizontally around a support and swings vertically by a drive mechanism. A hanger arm is horizontally rotatably connected to the swinging end of the hanger arm, and a luggage hanger is suspended from the end of the hanger arm to scoop up a large tire onto a pair of rollers and hold it vertically. It is.

The present invention further improves the large tire transport vehicle related to the previous proposal, and allows the control device of the hydraulic cylinder of the drive mechanism that swings the parallel link mechanism up and down to be set to the operating mode via the receiving device by remote control with a wireless control device. To provide a large-tire transport vehicle that can be operated in accordance with the conditions, allows a worker to easily control the operation while observing the load situation from any position, and allows cargo handling work to be carried out safely and accurately. It is something.

Measures to solve the problem: A deck capable of loading large tires is formed at the rear of a self-propelled cart with a driver's seat on the front side, and a pair of upper and lower columns are rotatably supported on this deck. a parallel link mechanism which pivotally supports a link, and an arm support shaft is connected with a pin between the free ends of these links so as to be swingable horizontally and vertically about the support; and the parallel link mechanism. a drive mechanism having a hydraulic cylinder that is disposed astride the column and the upper link and swings the parallel link mechanism up and down, and a hanger arm that is connected to the arm support shaft of the parallel link mechanism so as to be freely rotatable in the horizontal direction. A lower beam is provided across the lower end of the inverted U-shaped frame, and a pair of holding rollers are arranged to protrude substantially horizontally from one side of the lower beam in parallel, and are detachably attached to the free end of the hanger arm. and a luggage hanger that is suspended and holds a large tire vertically over the pair of holding rollers, and the drive mechanism receives an operation signal from a wireless operation device and operates a control device for the hydraulic cylinder. It is equipped with a receiving device that operates.

Function By rotating the parallel link mechanism and the hanger arm in the horizontal direction, the parallel link mechanism and the hanger arm extend from above the deck of the cart. I lowered it to a nearby location, pushed the luggage hanger towards the large tire that was placed vertically, and
By applying a pair of holding rollers to the circumferential side of a large tire and lifting the luggage hanger, the large tire can be scooped up while straddling the pair of holding rollers.

Therefore, by horizontally rotating the hanger arm and the parallel link mechanism again onto the deck, large tires can be easily loaded onto the deck together with the luggage hanger.

When the truck is driven to the destination and the large tires are to be unloaded, the aforementioned operations can be reversed to easily unload the large tires.

The lifting and lowering operation of the luggage hanger based on the vertical swing of the parallel link mechanism during loading and unloading of large tires is performed by sending an operating signal from the receiving device to the hydraulic cylinder control device based on the operation of the wireless operating device, and controlling the hydraulic pressure. This is done by operating the cylinder in accordance with the operating mode of the wireless operating device.

Example Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

In Figures 1 to 9, 1 indicates front and rear wheels 1a and 1b.
A trolley that is self-propelled by an engine or motor, and has a driver's seat S formed on the front side, and
A deck 2 is formed behind the driver's seat S with sufficient space to load large tires W used in aircraft and the like.

In this embodiment, the ground height of the substantially rear half 2a of the deck 2 is lowered, and the deck 2 is formed into a multi-stage shape.
The large tires W are vertically loaded on the truck a along with a luggage hanger to be described later, and the lower side of the large tires W can be prevented from shifting forward by the deck stepped part when the truck is braked.

Reference numeral 3 denotes a parallel link mechanism disposed on the rear end of the rear half 2a of the deck, which includes a support 8 that is rotatable by being pivotally supported by a bearing 5 provided at the center of the rear end of the rear half 2a of the deck; It consists of a pair of links 9 and 10 that are pivotally supported at the top and bottom, and an arm support shaft 11 that is connected with a pin between the free ends of these links 9 and 10, and is rotated horizontally and vertically about the support 8. It is swingable.

Reference numeral 4 denotes a drive mechanism for vertically swinging the parallel link mechanism 3, which includes a hydraulic cylinder 4a pivotally supported on a bracket 13 provided at the bottom of the column 8, and a hydraulic cylinder 4a connected at one end to the top of the column 8 with a pin, in the middle. an arm 14 in the shape of an angular shape connected to the actuating rod 4b of the cylinder 4a and supported by the hydraulic cylinder 4a;
It consists of a strut-type shock absorber 15 connected by a pin between the free end of the arm support shaft 11 of the upper link 9 and the vicinity of the end of the upper link 9 on the side where the arm support shaft 11 is connected. 14, buffer 15
is transmitted to the upper link 9 via the link 9, thereby causing the parallel link mechanism 3 to swing up and down about the support 8.

12 is a hanger arm attached to the arm support shaft 11 of the parallel link mechanism 3 so as to be freely rotatable in the horizontal direction;
A luggage hanger 6 is rotatably suspended from its free end.

The luggage hanger 6 is removably suspended from the hanger arm 12 via a hook pin 7a, and is rotatable horizontally about the hook pin 7a. The luggage hanger 6 includes an inverted U-shaped frame 18, a lower beam 18a that straddles the lower end of the frame 18, and a pair of rotatably arranged substantially horizontally parallel protrusions on both ends of the lower beam 18a. Holding rollers 19 are provided, and a heavy large tire W can be scooped up and placed on these holding rollers 19.

Reference numeral 21 denotes a height adjustment mechanism disposed at the upper end of the frame 18 of the luggage hanger 6, which is inclined diagonally upward on the side of the side where the holding roller 19 is protruded from the upper end of the frame 18. A pair of inner cylinders 2
4, 24, and a pair of outer cylinders 23, which are projecting obliquely downward from the lower surface of the bracket 7, which has the hook pin 7a projecting from the upper surface thereof, and which are slidably fitted onto the inner cylinders 24, 24. 23, and is stretched between each inner cylinder 24 and outer cylinder 23, and the frame 1
8. A balancer spring 24a that bears the load of the lower beam 18a and the holding roller 19 is disposed between the inner and outer cylinders 23, 24 and 23, 24 on both sides, spanning the bracket 7 and the upper end of the frame 18. A screw mechanism 22 is provided.

The screw mechanism 22 includes a screw shaft 22b that is rotatably supported on the upper end of the frame 18 and has a handle 22a at the lower end, and an inner cylinder 22d that has a nut member 22c screwed onto the screw shaft 22b inside the tip. and,
A screw shaft 22b is fixed to the upper end of the frame 18.
an outer cylinder 22e that encloses the inner cylinder 22d and is slidably fitted into the inner cylinder 22d, and a cylindrical protective cover 22f that is fixed to the inner cylinder 22d and covers the fitting portion of the inner and outer cylinders 22d and 22e. It is equipped with and,
In this screw mechanism 22, the upper end of the inner cylinder 22d is loosely fitted onto a support shaft 22g protruding from the bracket 7, and is swingably connected by a pin 22h.

As a result, by rotating the handle 22a and moving the nut member 22c along the screw shaft 22b, the inner and outer cylinders 23 and 24 are relatively expanded and contracted, and the outer cylinders of the large tires W and _W1 are moved. The height of the luggage hanger 6, that is, the height from the lower beam 18a to the bracket 17 can be adjusted according to the diameter.

On the other hand, at approximately the center of both sides of the truck 1, the rear end is rotatably supported to be able to touch the ground, and is pivoted approximately horizontally, so that a large tire W can be placed vertically along the side of the truck 1. A tray-shaped tire mounting portion 48 on which the tire is placed is provided so as to protrude laterally.

Specifically, a support shaft 46 is disposed horizontally protruding from the side of the truck 1, and this support shaft 46
A tire mounting portion 48 is mounted on a bracket 46a fixed to the tire mounting portion 48.
is rotatably supported.

This tire mounting section 48 has one side thereof and the trolley 1.
It is rotated by a hydraulic cylinder 47 provided straddling the side part of the cylinder.

Further, the rear end portion of the tire mounting portion 48 is formed to be inclined upward, so that the large tire W is rolled onto this rear end portion when it touches the ground.

A receiving device 26 for operating a control device 25 of the hydraulic cylinder 4a of the drive mechanism 4 is disposed near the driver's seat S of the truck 1, for example.
The receiving device 26 receives an operating signal from the wireless operating device 27 to operate the control device 25, and in accordance with the operating mode of the wireless operating device 27, operates the hydraulic cylinder 4a to operate the parallel link mechanism 3. It is designed to swing vertically.

3 and 4 show an example of the wireless operation device 27, and in this embodiment, two lift modes are used to perform the lift operation of the hydraulic cylinder 4a in two modes: Hi (fast) and LOW (slow). Switch button 28, 2
9, and a down switch button 30 for operating the hydraulic cylinder 4a down.

Each of these switch buttons 28, 29, 30 has a required frequency, for example, 1500Hz, 1000Hz,
Oscillation circuits 31, 32 that oscillate a 500Hz modulation signal,
33 is connected.

The signals oscillated from these oscillation circuits 31, 32, and 33 are subjected to FM modulation by a carrier wave oscillation circuit 34, amplified by an amplifier circuit 35, and transmitted from an antenna 36.

On the other hand, the receiving device 26, as shown in FIG.
The demodulator 39 demodulates the modulated signal included in the wave.

The control device 25 includes two lift solenoid valves 40 and 41 and a down solenoid valve 42 that perform lift operation of the hydraulic cylinder 4a in two modes: Hi (fast) and LOW (slow), and each of these solenoid valves. 40,4
1, 42, solenoid valve drive circuits 43, 44,
45, these solenoid valve drive circuits 4
Among the hydraulic cylinders 3, 44, and 45, the one that matches the mode of the signal received and demodulated by the receiving device 26 is driven, so that the hydraulic cylinder 4a can be operated in accordance with the operating mode of the wireless operating device 27. ing.

In the figure, reference numeral 50 denotes outriggers that are disposed on both sides of the truck 1 and are grounded during cargo handling operations.

According to the structure of the above embodiment, the large tire W held on the luggage hanger 6 is transported by running the trolley 1 to the destination, and is lowered from the rear half 2a of the deck.
For example, when mounting on the axle of an aircraft, when the hydraulic cylinder 4a is slightly extended, the driving force is transmitted from the upper link 9 to the lower link 10 via the arm support shaft 11, and the upper and lower links 9, 10 are simultaneously swung upward to move the arm support shaft 11 vertically upward in parallel with the support column 8.

As a result, the luggage hanger 6 suspended from the hanger arm 12 is lifted together with the large tire W from the rear half 2a of the deck, so that the parallel link mechanism 3 is manually rotated horizontally about the support 8, and the hanger arm 12 as arm support shaft 1
If the luggage hanger 6 is similarly rotated horizontally around 1, the luggage hanger 6 can be moved to the deck 2 as shown in the 6th and 7th figures, for example.
It can be moved to a predetermined position at the rear.

Therefore, the parallel link mechanism 3 and the hanger arm 12 can be rotated in the horizontal direction, and the luggage hanger 6 can be rotated in the horizontal direction.
The large tire W is brought to the side of the axle end of the aircraft (not shown) by horizontal rotation around the hook pin 7a, and the cargo hanger 6 is moved around the large tire W by operating the hydraulic cylinder 4a. By adjusting the center so that it is at the height of the axle end and pushing the luggage hanger 6 together with the large tire W toward the axle end, the large tire W can be easily moved to the axle end while being suspended. It can be fitted and installed.

Next, when removing the old large tire W from the axle, taking it into the luggage hanger 6, and loading it on the rear half 2a of the deck, move the luggage hanger 6 to the side of the large tire W attached to the axle in the same manner as described above. Bring it,
The luggage hanger 6 is pushed toward the large tire W so that the pair of holding rollers 19, 19 are inserted under the large tire W, and the luggage hanger 6 is moved slightly upward by the operation of the hydraulic cylinder 4a. The holding rollers 19, 19 are brought into contact with the lower side of the large tire W (see FIGS. 6 and 7).

Then, by unfastening the large tire W from the axle and moving the large tire W along with the luggage hanger 6 in a direction away from the axle, the large tire W can be scooped onto these holding rollers 19, 19, so that the large tire W can be scooped up onto these holding rollers 19, 19. All you have to do is reverse the process of installing the large tire W mentioned above, and fold the parallel link mechanism 3, hanger arm 12, and luggage hanger 6 compactly onto the rear half 2a of the deck using their connection points as nodes, and then attach the luggage. The hanger 6 can be stored in a state substantially parallel to the parallel link mechanism 3 (see Figures 1 and 2).

Similarly, when a large tire W stored vertically on the floor of a hangar or the like is taken into the luggage hanger 6 and loaded onto the rear half 2a of the deck, the luggage hanger 6 is lowered to near the floor. As described above, the large tire W stored vertically is brought to the side and pushed toward the large tire W, and a pair of holding rollers 19,
19 to the circumferential side of the large tire W and move the luggage hanger 6 upward by the operation of the hydraulic cylinder 4a, the large tire W can be scooped onto these holding rollers 19, 19, and the rest is done. By rotating the hanger arm 12, the parallel link mechanism 3, and the luggage hanger 6 in the horizontal direction, and by vertically swinging the parallel link mechanism 3 by the hydraulic cylinder 4a, the large tire W is moved together with the luggage hanger 6 onto the rear half 2a of the deck. can be loaded on.

On the other hand, if the large tires W held and loaded on the cargo hanger 6 on the rear half 2a of the deck are to be lowered onto the floor of a hangar or the like and stored vertically, the above-mentioned tire loading process can be reversed. .

Next, when placing the large tire W on the tire placement portions 48 that extend laterally on both sides of the trolley 1,
The hydraulic cylinder 47 is actuated to rotate the tire mounting portion 48 downward from the horizontal position, and the rear end portion is brought into contact with the ground as shown by the chain line in FIG. Then, the large tire W is rolled on the road surface to ride on the rear end of the tire mounting section 48, and in this state, the hydraulic cylinder 47 is operated to rotate the tire mounting section 48 to its original horizontal state. By moving and returning the large tire W, the large tire W can be easily scooped onto the tire mounting portion 48 and stacked vertically without requiring any effort.

Here, the lifting and lowering operation of the luggage hanger 6 based on the vertical swing of the parallel link mechanism 3 during loading and unloading of the large tires W is controlled by the receiving device 26 from the hydraulic cylinder 4a by pressing a button on the wireless operating device 27. Since the operation signal is sent to the control device 25 of the controller 25 and the hydraulic cylinder 4a is operated in accordance with the operation mode of the wireless operation device 27, the parallel link mechanism 3,
When the hanger arm 12 horizontally rotates and expands and contracts, the harness does not become entangled, and work can be carried out smoothly.

Effects of the invention As described above, according to the invention, it is possible to easily transport heavy large tires to the destination by running a self-propelled trolley, and it is also possible to load and unload large tires in parallel. link mechanism,
Large tires can be easily loaded and unloaded by a single worker by manually rotating the hanger arm and luggage hanger in the horizontal direction and by vertically swinging the parallel link mechanism by operating the drive mechanism. This makes it possible to save labor and speed up the work.

In particular, the parallel link mechanism rotates horizontally around the support column, and the hanger arm rotates horizontally about the arm support axis of this parallel link mechanism, so the horizontal rotation of the parallel link mechanism and hanger arm causes the carriage to move. The cargo hanger can be freely extended to the designated loading or unloading position for large tires, such as on the left and right sides of the deck, or in the front and rear directions, without any adjustment, making cargo handling operations even easier. be able to.

In particular, when loading and unloading large tires, the lifting and lowering of the luggage hanger based on the vertical swing of the parallel link mechanism is performed by sending an operating signal from the receiving device to the control device of the hydraulic cylinder of the drive mechanism based on the operation of the wireless operating device. This can be done by operating the hydraulic cylinder in accordance with the operation mode of the wireless operation device, so the operator can easily control the operation while observing the cargo status from any position. Cargo handling work can be performed safely and accurately.

[Brief explanation of the drawing]

Fig. 1 is a plan view of one embodiment of the present invention, Fig. 2 is a side view of the same, Fig. 3 is a front view of the wireless operating device, and Fig. 4 is a plan view of an embodiment of the present invention.
The figure is a block circuit diagram of the device, Figure 5 is a block circuit diagram of the receiving device and control device, Figures 6 and 7 are plan and side views showing the working status, and Figure 8 is the height adjustment mechanism. 9 is a side view of a luggage hanger, and FIG. 10 is a perspective view of a conventional lifter. 1... Truck, 2... Deck, 3... Parallel link mechanism, 4... Drive mechanism, 4a... Hydraulic cylinder,
6... Luggage hanger, 8... Support, 9... Upper link, 10... Lower link, 11... Arm support shaft, 12... Hanger arm, 18... Frame, 18a... Lower beam, 19 ...Holding roller, 25...Hydraulic cylinder control device, 26...
Receiving device, 27... Wireless operation device.

Claims (1)

[Scope of utility model registration request] A deck capable of loading large tires is formed at the rear of a self-propelled trolley that has a driver's seat on the front side, and a pair of links are pivotally supported at the top and bottom of a column rotatably supported on this deck. A parallel link mechanism in which an arm support shaft is connected with a pin between the free ends of these links so that it can swing freely in the horizontal and vertical directions around the column, and the column and upper link of the parallel link mechanism. A drive mechanism that has a hydraulic cylinder that straddles the parallel link mechanism and swings the parallel link mechanism up and down, a hanger arm that is horizontally rotatably connected to the arm support shaft of the parallel link mechanism, and an inverted U-shaped frame. A lower beam is provided at the lower end of the hanger arm, and a pair of holding rollers are arranged to protrude from the lower beam substantially horizontally in parallel to one side, and are removably suspended from the free end of the hanger arm. a luggage hanger that holds a large tire vertically over a holding roller, and the drive mechanism includes a receiving device that receives an operating signal from a wireless operating device and operates a control device for the hydraulic cylinder. A large tire transport vehicle characterized by: