JPH057871Y2 - - 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 for 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 equipped with a roller 1, respectively.
02, 102 are rotatably supported, and a large tire W is placed astride 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 according to the previous proposal, and provides a large tire transport vehicle that can more easily carry out loading and unloading of large tires using a luggage hanger.

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. The driving mechanism includes a hydraulic cylinder that is installed across the column and the upper link, and is actuated by a remote control switch to swing the parallel link mechanism up and down. A hanger arm connected so as to be rotatable in the direction,
A lower beam is provided across the lower end of the inverted U-shaped frame, and a pair of holding rollers are arranged on one side of the lower beam to protrude substantially horizontally in parallel, and are detachably suspended from the free end of the hanger arm. and a luggage hanger that holds a large tire vertically over the pair of holding rollers, and a manual operation handle is provided on the frame of the luggage hanger, and a manual operation handle is provided near the manual operation handle. Place it in the area that you can reach with your fingertips while gripping the operating handle.
A switch holder is provided to detachably hold the remote control switch.

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 load kinger, the large tire can be scooped up astride 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 trolley is driven to its destination and the large tires are to be unloaded, it can be easily unloaded by reversing the above-mentioned operations.

The luggage hanger can be easily moved to a predetermined position by extending the parallel link mechanism and the hanger arm by grasping a manual operation handle provided on the frame of the luggage hanger.

In addition, the vertical movement of the luggage hanger can be done by holding a remote control switch in hand or while holding it in the switch holder, and by operating the switch to remotely control the hydraulic cylinder of the drive mechanism, while checking the loading status. It can be done easily.

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 stacked 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 portion 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 column 8 that is rotatable by being pivotally supported by a bearing 7 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, and a hydraulic cylinder 14 having a cylinder body 14a pivotally supported on a bracket 13 provided at the bottom of the column 8.
, one end is connected to the upper part of the support column 8 with a pin, and the operating rod 14b of the hydraulic cylinder 14 is connected to the middle part, and the arm 15 is supported by the hydraulic cylinder 14, and the free end of the arm 15. and a strut-type shock absorber 16 connected by a pin between the upper link 9 near the end on the side where the arm support shaft 11 is connected. upper link 9 through vessel 16
This causes the parallel link mechanism 3 to swing up and down around the pillar 8.

The hydraulic cylinder 14 is extended and retracted by operating a remote control switch SW that remotely controls a control device (not shown).

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 engaged with and suspended from a slit 12a formed at the free end of the hanger arm 12 via a hook pin 26.
It is rotatable in the horizontal direction around this hook pin 26. The luggage hanger 6 includes an inverted U-shaped frame 19, a lower beam 19a that straddles the lower end of this frame 19, and a pair of rotatably arranged substantially horizontally parallel protrusions on both ends of the lower beam 19a. Holding rollers 20 are provided, and a heavy large tire W can be scooped up and placed on these holding rollers 20.

Reference numeral 21 denotes a height adjustment mechanism disposed at the upper end of the frame 19 of the luggage hanger 6, and is provided at the upper end of the frame 19 on the side of the side where the holding roller 20 is protruded and is inclined diagonally upward. A pair of inner cylinders 2
4, 24, and a pair of outer cylinders 23, which are provided on the lower surface of the bracket 25, which has the hook pin 26 projecting from the upper surface thereof, projecting obliquely downward, and are slidably fitted onto the inner cylinders 24, 24. 23 and each of these inner cylinders 24
and the outer cylinder 23, and bears the loads of the frame 19, the lower beam 19a, and the holding roller 20, and between the inner and outer cylinders 23, 24 and 23, 24 on both sides. A screw mechanism 22 is provided spanning the bracket 25 and the upper end of the frame 19.

The screw mechanism 22 includes a screw shaft 22b that is rotatably supported on the upper end of the frame 19 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 19.
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,
This screw mechanism 22 loosely fits the upper end of the inner cylinder 22d onto a support shaft 22g protruding from the bracket 25,
They are slidably 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 19a to the bracket 25 can be adjusted according to the diameter dimension.

On both sides of the upper part of the frame 19, there are manual operation handles 28, 2 for moving the luggage hanger 6.
8 is provided in a protruding manner on the side opposite to the side on which the holding roller 20 is protruded.

The remote control switch SW described above can be attached and detached near the manual operation handle 28, in this embodiment, near one of the manual operation handles 28, at a position that can be reached with a fingertip while gripping the manual operation handle 28. A switch holder 29 is provided to hold the switch.

The switch holder 29 is formed into a box shape and is connected to the frame 19, and is connected to the manual operation handle 2.
The side wall on the protruding side of 8 is opened to expose the switch button of the remote control switch SW, so that even when the remote control switch SW is housed and held in the switch holder 29, the hand holding the manual operation handle 28 cannot be used. The switch button can be operated.

Further, in this embodiment, the lower beam 19a and the height adjustment mechanism 21 are also provided with a manual operation handle 28 spanning the outer cylinders 23, 23, and the bearing portion of the hanger arm 12 is also provided with a parallel link mechanism 3.
A manual operation handle 40 is provided to facilitate rotational operation.

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 37 on which the tire is placed is provided so as to protrude laterally.

Specifically, a support shaft 34 is disposed horizontally protruding from the side of the truck 1, and this support shaft 34
A tire mounting portion 37 is rotatably supported by a bracket 35 fixedly attached to the tire mounting portion 37.

This tire mounting section 37 has one side thereof and the trolley 1.
It is rotated by a hydraulic cylinder 36 provided straddling the side of the cylinder.

Further, the rear end of the tire mounting portion 37 is formed to be inclined upward, so that the large tire W is rolled onto this rear end when it touches the ground.

In the figure, reference numeral 39 denotes a pair of outriggers that are disposed on each side 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 14 is slightly extended by operating the remote control switch SW, the driving force is transmitted from the upper link 9 to the lower link 10 via the arm support shaft 11. Then, the upper and lower links 9 and 10 are simultaneously swung upward to move the arm support shaft 11 vertically upward in parallel with the 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, and the parallel link mechanism 3 is moved horizontally by gripping the manual operation handle 40 and manually operating the support column 8. At the same time, if the handles 28 on both sides of the frame 19 of the luggage hanger 6 are manually operated and the hanger arm 12 is similarly rotated in the horizontal direction about the arm support shaft 11, for example, as shown in FIGS. like luggage hanger 6
can be moved to a predetermined position behind the deck 2.

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 26, and the hydraulic cylinder 14 is actuated to move the cargo hanger 6 onto the large tire W. 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. Can be fitted and installed.

The remote control of the hydraulic cylinder 14 during the above-mentioned position adjustment is performed using the remote control switch SW.
You can operate the remote control switch SW by holding it in your hand, but by storing and holding it in the switch holder 29, you can operate the remote control switch SW with your fingertips while holding the manual operation handle 28 on the side of the frame 19.
Therefore, the horizontal rotation and extension operations of the parallel link mechanism 3, hanger arm 12, and luggage hanger 6 can be performed efficiently. For fine adjustment, hold the manual operation handles 28 on both sides of the frame 19, and
This can be easily done by placing your foot on the manual operation handle 28 of the lower beam 19a to tilt the luggage hanger 6, or by slightly rotating the luggage hanger 6 in the horizontal direction.

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 20, 20 are inserted under the large tire W, and the luggage hanger 6 is moved slightly upward by the operation of the hydraulic cylinder 14. The holding rollers 20, 20 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 20, 20, so that the large tire W can be scooped up onto these holding rollers 20, 20. 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 the pair of holding rollers 2
0,20 on the circumferential side of the large tire W,
If the luggage hanger 5 is moved upward by the operation of the hydraulic cylinder 14, the large tire W can be scooped onto these holding rollers 20, 20, and then the hanger arm 12, the parallel link mechanism 3, and the luggage hanger 6 are moved. By the horizontal rotation operation and the vertical swing of the parallel link mechanism 3 by the hydraulic cylinder 14, the large tire W can be loaded together with the luggage hanger 6 onto the rear half 2a of the deck.

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 37 that extend laterally on both sides of the trolley 1,
The hydraulic cylinder 36 is actuated to rotate the tire mounting portion 37 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 37, and in this state, the hydraulic cylinder 36 is operated to rotate the tire mounting section 37 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 37 and stacked vertically without requiring any effort.

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 around the arm support axis of this parallel link mechanism, so the horizontal rotation of the parallel link mechanism and hanger arm moves the cart. 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 addition, the remote control switch for remotely controlling the hydraulic cylinder of the drive mechanism is detachably held in a switch holder provided near the manual operation handle on the frame of the luggage hanger, so it is easy to hold the remote control switch in your hand. Not only can it be remotely controlled, but it can also be remotely controlled while holding the manual operating handle in the switch holder.Therefore, it is possible to remotely control the luggage hanger, hanger arm, and parallel link mechanism by holding the manual operating handle. In addition to horizontal rocking operation, the hydraulic cylinder can be lifted and lowered by remote control.
Cargo handling operations can be carried out rationally, large tires can be easily and accurately loaded and unloaded at predetermined positions, and operations can be carried out efficiently and with high reliability.

[Brief explanation of drawings]

Fig. 1 is a plan view of an embodiment of the present invention, Fig. 2 is a side view of the same, Fig. 3 is a perspective view of the same main parts, Fig. 4 is a front view of the switch holder, and Fig. 5 is the same as Fig. 4. V-V of
6 and 7 are plan views and side views showing working conditions, FIG. 8 is a sectional view of the height adjustment mechanism, FIG. 9 is a side view of the luggage hanger, and FIG.
The figure is a perspective view of a conventional lifter. 1...Dolly, 2...Deck, 3...Parallel link mechanism, 4...Drive mechanism, 6...Luggage hanger, 8
...Strut, 9...Upper link, 10...Lower link, 11...Arm support shaft, 12...Hanger arm, 14...Hydraulic cylinder of drive mechanism, 19
... Frame of luggage hanger, 19a ... Lower beam, 20 ... Holding roller, 28 ... Manual operation handle, 29 ... Switch holder, SW ... Remote control switch, W ... Large tire.

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 is arranged across and operated by a remote control switch to swing the parallel link mechanism up and down, and a drive mechanism that is connected to the arm support shaft of the parallel link mechanism so that it can freely rotate in the horizontal direction. hanger arm and
A lower beam is provided across the lower end of the inverted U-shaped frame, and a pair of holding rollers are arranged on one side of the lower beam to protrude substantially horizontally in parallel, and are detachably suspended from the free end of the hanger arm. and a luggage hanger for vertically holding a large tire while straddling the pair of holding rollers, and a manual operation handle is provided on the frame of the luggage hanger, and a manual operation handle is provided near the manual operation handle. A large tire transport vehicle, characterized in that a switch holder for removably holding the remote control switch is provided at a location that can be reached by the tip of a finger while gripping a manual operation handle.