JPH058200Y2 - - 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.

BACKGROUND TECHNOLOGY Large tires used on aircraft and large vehicles are quite heavy and require a lot of effort to transport and unload. A large tire transport vehicle disclosed in Japanese Patent No. 62-56299 has been proposed.

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 holding rollers and hold it vertically. It is something.

Problems that the invention aims to solve: A single large tire is scooped vertically onto a pair of holding rollers on a luggage hanger, and the luggage hanger can be loaded onto the trolley. The loading capacity of large tires is low and transportation efficiency cannot be said to be good.

Therefore, with this invention, large tires can be stably loaded vertically along the sides of the cart, increasing the loading capacity, and it is also possible to load and unload large tires onto the sides of the cart. Not only can the work be carried out easily, but also the large tires can be reliably prevented from falling according to the size of the large tires taken onto the holding rollers of the luggage hanger, and the large tires can be safely loaded and unloaded. The company provides large tire transport vehicles.

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 is arranged across the support column and the upper link to swing the parallel link mechanism up and down, a hanger arm is connected to the arm support shaft of the parallel link mechanism so as to be rotatable in the horizontal direction, and an inverted U A lower beam is provided across the lower end of the letter-shaped frame, and a pair of holding rollers are disposed 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. , a large tire transport vehicle equipped with a luggage hanger for vertically holding a large tire while straddling the pair of holding rollers; , there is a tray-shaped tire mounting section that is supported approximately horizontally and that allows large tires to be placed vertically along the sides of the trolley, and is provided with a tray-shaped tire mounting section extending laterally. Straddling above the large tire taken in above, a substantially L-shaped holder is provided on one side edge of the large tire to prevent it from falling, and is removable.
The holder is provided with a ratchet mechanism that adjusts the holding length in multiple stages.

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.

The holding length of the holder is adjusted by a ratchet mechanism according to the width dimension of the large tire taken onto the holding roller, and by engaging the L-shaped tip with one side edge of the large tire, Large tires are reliably prevented from falling on the 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.

When loading a large tire onto the tire mounting section on the side of the truck, rotate the tire mounting section from a nearly horizontal position so that the rear end touches the ground, roll the large tire onto the road surface, and place the large tire on the tire mounting section. After placing the tire on the rear end, the large tire can be loaded vertically onto the tire rest without any effort by rotating and returning the tire rest to its original substantially horizontal state. .

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

In Figures 1 to 12, 1 is the front wheel, rear wheel 1a, 1
b, and is self-propelled by an engine or motor, and has a driver's seat S formed on the front side, and can carry large tires W used for aircraft, etc. behind the driver's seat S. A deck 2 with sufficient space is formed.

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 support 5 that is rotatable by being supported by a bearing 4 provided at the center of the rear end of the rear half 2a of the deck; It consists of a pair of links 6 and 7 that are pivotally supported at the top and bottom, and an arm support shaft 8 that is connected with a pin between the free ends of these links 6 and 7, and the arm support shaft 8 is pivoted in the horizontal and vertical directions around the support 5. It is swingable.

Reference numeral 10 indicates a drive mechanism for vertically swinging the parallel link mechanism 3, and a bracket 11 provided at the bottom of the support column 5.
Hydraulic cylinder 1 with cylinder body 12a pivotally supported on
2, an arm 13 with one end connected to the upper part of the support column 5 with a pin and an operating rod 12b of a hydraulic cylinder 12 connected to the middle part and supported by the hydraulic cylinder 12, and a free end of the arm 13. It consists of a strut-type shock absorber 14 connected by a pin between the end and the end of the upper link 6 on the side where the arm support shaft 8 is connected, and transfers the extension/retraction force of the hydraulic cylinder 12 to the arm 13, Upper link 6 via buffer 14
This causes the parallel link mechanism 3 to swing up and down around the pillar 5.

Reference numeral 9 denotes a hanger arm that is horizontally rotatably attached to the arm support shaft 8 of the parallel link mechanism 2, and a luggage hanger 17 is rotatably suspended from the free end of the hanger arm.

The luggage hanger 17 is removably suspended from the hanger arm 9 via a hook pin 20, and is horizontally rotatable about the hook pin 20. The luggage hanger 17 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 protruding parts substantially horizontally parallel to one side at 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 17, and is provided at the side of the upper end of the frame 18 on which the holding roller 19 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 21a with the hook pin 20 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 2
4 and the outer cylinder 23 to bear the loads of the frame 18, lower beam 18a, and holding roller 19, and the inner and outer cylinders 23, 24 and 23, 24 on both sides.
A screw mechanism 22 is provided between the bracket 21a and the upper end of the frame 18.

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 similar 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 21a, and is swingably connected to the shaft 22g by a pin 22h.

Thereby, 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 large tires W ₁ and W ₂ are The height of the luggage hanger 17, that is, the height from the lower beam 18a to the bracket 21a can be adjusted according to the outer diameter dimension.

The upper end of the luggage hanger 17, that is, the lower surface of the bracket 21a, is provided with a fall-preventing device that can be freely engaged with and detached from one side edge of the large tire W taken on the holding rollers 19, 19. A holder 25 is attached.

This holder 25 has a holder main body 2 bent at a right angle.
5b, a stem 28 constituting a ratchet mechanism, which will be described later, is fixed to the rear end of the holder body 25b, and a handle portion 25a connected with a pin to the rear end of the stem 28.
The handle portions 25a are each made of a round bar material, and the holder 25 is formed in an L-shape as a whole.

In this embodiment, the holder 25 includes a support bracket 31 fixed to the lower surface of the bracket 21a, a holder guide 32, and a bent edge 33 at the rear end of the bracket 21a.
It is supported by a holder support hole 34 formed in .

The holder support hole 34 engages with a non-circular portion 29 with a square cross section formed in the handle portion 25a, and the holder support hole 34
5 and a large-diameter circular hole 36 that is formed above the lock hole 35 and allows the holder 25 to rotate.

The support bracket 31 has an elongated hole 37 in the vertical direction.
On the other hand, an insertion hole 38 with a slightly larger diameter than the holder main body 25b is formed in the holder guide 32, and the holder 25 is circularly connected to the lock hole 25 on the handle portion 25a side with the holder guide 32 as a fulcrum. The holder main body 25b can be moved up and down between the hole 36 and the upper edge of one side of the large tire W by grasping the handle part 25a and moving the holder 25 up and down and rotating it. I have made it possible.

Reference numeral 26 designates a ratchet mechanism for adjusting the holding length of the holder 25 in multiple stages, and includes ratchet teeth 27 formed on the upper surface side of the stem 28 and a pair of pawls 40 that engage and disengage from the ratchet teeth 27. .

The stem 28 has a pin 4 attached to the support bracket 31.
Similarly, a pin 4 is attached to the rear end of the two connected links 43.
Four connected U-shaped ratchet holders 39 are slidably mounted on the exterior, and the pawls 40 are connected to the ratchet holders 39 by pins 41, and the pins 41 are biased in the direction of engaging the pawls 40 with the ratchet teeth 27. The width of the large tire W or _W1 is such that the ratchet mechanism 26 restrains the forward movement of the holder 25, and the holding length of the holder 25 is taken onto the holding rollers 19, 19. It can be adjusted appropriately according to the dimensions.

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 45 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
The tire mounting portion 45 is mounted on a bracket 46a fixed to the tire mounting portion 45.
is rotatably supported.

This tire mounting section 45 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 45 is formed to be inclined upward, so that when the tire rests on the ground, the large tire W is rolled onto this rear end portion and rides on the rear end portion.

In the figure, reference numeral 48 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 above embodiment structure, the luggage hanger 17
When the large tire W held in the carriage 1 is transported to the destination by traveling on the truck 1, and is lowered from the rear half 2a of the deck and attached to the axle of an aircraft, for example, when the hydraulic cylinder 12 is slightly extended, The driving force is transmitted from the upper link 6 to the lower link 7 via the arm support shaft 8, and simultaneously swings the upper and lower links 6 and 7 upward to align the arm support shaft 8 vertically and parallel to the support column 5. Move upward.

As a result, the luggage hanger 17 suspended from the hanger arm 9 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 5, and the hanger arm 9 in the horizontal direction about the arm support shaft 8, for example, the first
As shown in FIGS. 0 and 11, the luggage hanger 17 can be moved to a predetermined position behind the deck 2.

Therefore, the parallel link mechanism 3 and the hanger arm 9 can be rotated in the horizontal direction, and the luggage hanger 17 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 rotating in the horizontal direction around the hook pin 20, and the cargo hanger 17 is moved around the large tire W by operating the hydraulic cylinder 12. By adjusting the center so that it is at the height of the axle end and pushing the luggage hanger 17 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 17, and loading it on the rear half 2a of the deck, do the same as described above on the luggage hanger 1.
7 to the side of the large tire W mounted on the axle, push the luggage hanger 17 toward the large tire W, and insert the pair of holding rollers 19, 19 under the large tire W. The luggage hanger 17 is moved slightly upward by the operation of the hydraulic cylinder 12, and these holding rollers 19, 19 are attached to the large tire W.
(See Figures 10 and 11).

Then, by unfastening the large tire W from the axle and moving the large tire W along with the luggage hanger 17 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 later. 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 9, and luggage hanger 17 compactly onto the rear half 2a of the deck using their connection points as nodes, and then attach the luggage. The hanger 17 can be stored in a state substantially parallel to the parallel link mechanism 3 (see FIGS. 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 17 and loaded onto the rear half 2a of the deck, the luggage hanger 17 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 1
9 and 19 on the circumferential side of the large tire W,
If the luggage hanger 17 is moved upward by the operation of the hydraulic cylinder 12, the large tire W can be scooped onto these holding rollers 19, 19, and then the hanger arm 9, parallel link mechanism 3,
By horizontally rotating the cargo hanger 17 and vertically swinging the parallel link mechanism 3 by the hydraulic cylinder 12, the large tire W can be loaded together with the cargo hanger 17 onto the rear half 2a of the deck.

On the other hand, the luggage hanger 17 is placed on the rear half 2a of the deck.
When the large tires W held and loaded are lowered onto the floor of a hangar or the like and stored vertically, the above-described tire loading operation may be reversed.

Here, as described above, when taking the large tire W onto the holding rollers 19, 19, or when taking it out from the holding rollers 19, 19, the holder 25
Hold the handle part 25a at the rear end of the handle part 2.
5a upward to remove the non-circular part 29 from the lock hole 35 and move it toward the circular hole 36, and then return the non-circular part 29 to the lock hole 35 at the 90-degree rotated position, and the tip of the holder body 25b is removed. Since the tire can be held at the tire removal position where the portion is substantially horizontal, there is no problem in taking in or taking out the large tire W.

On the other hand, when the large tires W are taken onto the holding rollers 19, 19, if the outer diameters of the large tires W are different, as shown in FIG _.
Then, the width dimension will also be different.

In this case, when the handle portion 25b of the holder 25 is lifted to remove the non-circular portion 29 from the lock hole 35 and rotated 90 degrees to the tire release position, the ratchet teeth 27 on the upper surface side of the stem 28 will be removed from the pawls 40 and the holder 25 will be removed. Since it can move freely back and forth, once the holder 25 is slid forward as far as it will go, the holder body 2
The handle portion 25a is rotated 90 degrees to the tire engaging position where the tip end of the grip portion 5b faces downward, and the non-circular portion 29 is engaged with the lock hole 35 again to prevent the holder 25 from rotating.

If the handle portion 25b is pulled rearward from this state, the ratchet teeth 27 get over the claws 40 and the holder 25 is allowed to slide backwards, so that the tip of the holder body 25b is aligned with the front edge of the large tire W or _W1 . If the pawl 40 is stopped at the position where it engages with the ratchet teeth 27, the holding length of the holder 25 is appropriately adjusted, and the large tire W or _W1 can be reliably prevented from falling.

Next, when placing the large tire W on the tire placement portions 45 that extend laterally on both sides of the trolley 1,
The hydraulic cylinder 47 is actuated to rotate the tire mounting portion 45 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 45, and in this state, the hydraulic cylinder 47 is activated to rotate the tire mounting section 45 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 45 and stacked vertically without requiring any effort.

Effects of the invention As described above, according to the invention, since the tray-shaped tire mounting portions are provided on both sides of the truck and protrude laterally, it is possible to load large tires together with the luggage hangers at the rear of the deck. Of course, large tires can also be stacked vertically on these tire mounting sections, so a plurality of large tires can be transported at once, increasing the transporting capacity.

Moreover, this tire rest can be rotated from a nearly horizontal position to bring the rear end into contact with the ground, so large tires can be rolled onto this tire rest or loaded onto the tire rest. It is possible to load and unload large tires without requiring much effort.

On the other hand, the approximately L-shaped holder that is provided at the upper end of the luggage hanger and that engages with and disengages from the front edge of the large tire loaded onto the holding roller is adjustable to adjust the holding length of the holder as desired. Since it is equipped with a ratchet mechanism, even if the width of the large tire changes due to different sizes, the holding length of the holder can be adjusted to suit the width of the large tire by adjusting the ratchet mechanism. , it is possible to reliably prevent large tires from falling over and perform safer cargo handling operations.

[Brief explanation of the drawing]

Fig. 1 is a side view of one embodiment of the present invention, Fig. 2 is a plan view of the same, Fig. 3 is a side view of a luggage hanger, and Fig. 4 is a side view of an embodiment of the present invention.
The figure is a sectional view showing the installed state of the holder, Figure 5 is an enlarged side view of the ratchet mechanism, Figure 6 is a sectional view taken along the - line in Figure 4, and Figure 7 is a cross-sectional view taken along the - line in Figure 4. 8 is a sectional view taken along the - line in FIG. 4, FIG. 9 is a front view of the holder support hole, and FIG.
11 are a plan view and a side view showing the working state, and FIG. 12 is a sectional view of the height adjustment mechanism. 1...Dolly, 2...Deck, 3...Parallel link mechanism, 5...Strut, 6...Upper link, 7...
Lower link, 8... Arm support shaft, 9... Hanger arm, 10... Drive mechanism, 17... Luggage hanger, 18... Frame, 18a... Lower beam,
19...Holding roller, 25...Holder for preventing falling, 26...Ratchet mechanism, 45...Tire mounting section, 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 swings the parallel link mechanism up and down, a hanger arm that is horizontally rotatable and connected to the arm support shaft of the parallel link mechanism, and a lower beam at the lower end of the inverted U-shaped frame. A pair of holding rollers are disposed so as to straddle the lower beam, and a pair of holding rollers are arranged to protrude substantially horizontally in parallel to one side of the lower beam, and are detachably suspended from the free end of the hanger arm. A large tire transport vehicle equipped with a luggage hanger that straddles the top and holds a large tire vertically, the rear end of which is rotatably supported substantially horizontally on both sides of the cart so as to be able to touch the ground. A tray-shaped tire mounting section for vertically placing large tires along the sides of the trolley is provided, protruding to the side. A removable, approximately L-shaped holder is provided on one side edge of the large tire to prevent it from falling, and the holder is provided with a ratchet mechanism that adjusts the holding length in multiple stages. A large tire transport vehicle with special features.