JPH04345506A - Wheel holding device for heavy duty dolly - Google Patents

Abstract

PURPOSE:To provide a wheel holding device having the capability of eliminating misalignment due to the inclining motion of a hold wheel, and ensuring easy wheel positioning with an axle in a heavy duty dolly equipped with a link mechanism on a body deck, and a cargo holding means detachably suspended from the free end of the link mechanism. CONSTITUTION:A wheel holding device is provided with an inclining motion adjustment mechanism to change the inclination of a held wheel W whenever necessary. The mechanism is constituted so that a plurality of adjusting bolts 31 to 34 are screwed to the free end 9a of a link mechanism 3, while the ends of the bolts 31 to 34 are being pressed to the top of a cargo holding means 17 about a holder pin 27 for detachably suspending the means 17 from the free end 9a.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wheel holding device for a heavy goods carrier for transporting large wheels used in large vehicles and aircraft.

0002

2. Description of the Related Art Large wheels used on large vehicles and aircraft are quite heavy, so a hand-operated lifter as shown in FIG. 6 is used to replace them. This lifter is equipped with a pair of arms 103, 103, each having support rollers 102, 102 on the upper surface, mounted on a U-shaped planar truck frame 100 equipped with casters 101. It is raised and lowered by a hydraulic jack 105 that is operated. The large wheel W is placed on support rollers 102, 102 on the pair of arms 103, and is lifted to a predetermined height by operating a hydraulic jack 105 and replaced.

0003

[Problems to be Solved by the Invention] However, in the case of such a conventional lifter, the lifter is manually pushed to a predetermined location to align it, and then the lever 104 is manually operated to lift the wheel W to adjust the height. It has been pointed out that positioning the wheels W requires a great deal of effort and time, resulting in poor work efficiency.

Furthermore, when the size of the wheels W is different,
It is difficult to place and transport this wheel on the support rollers 102, 102, and the wheel W tends to tilt, causing misalignment with the axle that is the mating member to be attached. There was a problem in that extra labor was required for centering.

Therefore, the present invention solves the problems of the conventional wheel holding device of a heavy goods transport vehicle, eliminates misalignment caused by tilting of the wheel W, and facilitates positioning with the axle. It is an object of the present invention to provide a wheel holding device that can be used as a wheel holding device.

[0006]

[Means for Solving the Problems] In order to achieve the above object, the present invention provides a link mechanism disposed on the deck of a vehicle body so as to be swingable in the horizontal and vertical directions, and a free end of the link mechanism. In a structure comprising a load holding means comprising a frame removably suspended from the part and a support member supporting the lower end of the wheel placed below the frame, the wheel holding device A wheel holding device for a heavy goods transport vehicle is provided with an inclination adjustment mechanism that appropriately changes the inclination of the held wheel.

[0007] The above-mentioned inclination adjustment mechanism is centered around a holder pin that removably suspends the cargo holding means from the free end portion of the link mechanism, and the free end is pressed against the upper surface of the cargo holding means. Consists of multiple adjustment bolts screwed together.

[0008]

[Operation] According to this configuration, when a large diameter wheel is held by the cargo holding means, by operating the inclination adjustment mechanism disposed at the free end portion of the link mechanism, the cargo can be held at the free end portion. The slope of the means can be adjusted accordingly.

[0009] Therefore, it is possible to freely change the inclination of the wheel held by the cargo holding means, eliminating the need for extra labor for centering the wheel with the axle, which is the mating member to which the wheel is attached. The effect is that positioning with the axle becomes easy.

[0010] The above-mentioned inclination adjustment mechanism includes a plurality of adjusting screws that are screwed together to pass through the free end portion of the link mechanism, centering on a holder pin that removably suspends the cargo holding means from the free end portion of the link mechanism. By using the bolt, the structure of the tilt adjustment mechanism itself can be simplified, and the tilt adjustment mechanism can function as a tilt adjustment mechanism.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the wheel holding device for a heavy goods transport vehicle according to the present invention will be described in detail below, taking a large tire transport vehicle as an example.

In the configuration shown in FIGS. 1 to 3, reference numeral 1 denotes a vehicle body that is self-propelled by an engine or a motor, and a link mechanism 3 is mounted on a deck 2 formed at the rear of the vehicle body 1.
is arranged to be able to swing horizontally and vertically. Further, a stamping mechanism 40 is attached to the side of the vehicle body 1 to stabilize the posture of the vehicle body 1 during operation.

The link mechanism 3 includes a parallel link mechanism 4 which can swing horizontally and vertically around a support 5 erected on the deck 2, and a horizontally swinging end portion of the parallel link mechanism 4. The link arm 9 is swingably connected to the link arm 9.

The parallel link mechanism 4 includes the support 5, a pair of links 6 and 7 formed in straight box cross sections that are pivotally supported at the upper and lower parts of the support 5, and the free ends of these links 6 and 7. It consists of an arm support shaft 8 connected with a pin in between, and the link arm 9 is mounted on this arm support shaft 8 so as to be able to swing freely in the horizontal direction.

[0015] The parallel link mechanism 4 is connected to the lifting drive means 1.
0 to swing vertically. This lifting/lowering driving means 10 includes a hydraulic actuator 12 having a cylinder body 12a pivoted on a bracket 11 projecting diagonally downward from the bottom of the support 5, and an arm 13 pivotally supported at the top of the support 5 so as to be able to swing vertically. The output shaft 12b of the hydraulic actuator 12 is connected to the intermediate portion of the arm 13 with a pin. The extending portion of the arm 13 is bent slightly diagonally downward, and its tip is connected with a pin near the free end of the link 6 via a balancing mechanism 14.

[0016] Thus, when the hydraulic actuator 12 is actuated by operating an electric switch (not shown), the parallel link mechanism 4 swings in the vertical direction.

The balancing mechanism 14 includes a strut type shock absorber 15 and a coil spring 16, and the upward lifting force of the hydraulic actuator 12 and the load of the heavy object are applied to the stroke of the hydraulic actuator 12 by the deflection of the coil spring 16. It balances out in the middle.

A baggage holding means 17 is vertically attached to the free end 9a of the link arm 9 so as to be detachable and rotatable in the horizontal direction. The cargo holding means 17 is configured such that a large, heavy wheel W can be placed over a frame 18 and a pair of holding rollers 19, 19 which are protruded almost horizontally from the lower end of the frame 18. ing. These holding rollers 19, 19
is rotated by a handle 20, so that the position of the wheel W in the rotational direction can be finely adjusted.

A screw mechanism 22 is actuated by operating a handle 22a on the upper part of the frame 18, and a pair of outer cylinders 23,
23 and inner cylinders 24, 24 to adjust the height of the cargo holding means 17 in accordance with the outer diameter dimension of the loaded wheel W. A height adjustment mechanism 21 is arranged in a forward tilted state. .

This cargo holding means 17 is provided with a holder 25 which can be freely engaged with and detached from the upper edge of the wheel W to prevent it from falling. As shown in FIG. 3, the holder 25 is bent downward at a substantially right angle from the middle, and its tip 25a is adapted to lock the upper edge of the wheel W.

4 and 5, the free end 9a of the link arm 9 and the bracket 26 at the upper end of the cargo holding means 17 are shown.
The structure of the connecting part will be explained.

A holder pin 27 is provided between the free end portion 9a and the bracket 26, and a handle 28 has one end pivotally supported on the upper side of the holder pin 27. is attached. By operating this handle 28, the bracket 26 can be attached or detached from the free end 9a.

That is, the handle 28 has bifurcated support pieces 28a, 28b.
is pivotally supported on the upper side of the holder pin 27. Furthermore, a support member 36 made of an elastic body is fixed to the lower surface of the bracket 26, and this support member 36 and the holder pin 27
An elastic member 37 is inserted between the lower end portion of.

Therefore, by operating the handle 28 in the vertical direction, the tightening force of the bracket 26 by the holder pin 27 can be adjusted appropriately based on the sliding action of the cam surface 28c of the handle 28 and the expansion and contraction action of the elastic member 37. adjusted,
The bracket 26 can be attached and detached from the free end 9a.

As a characteristic structure of this embodiment, the holder pin 27 is centered around the holder pin 27.
A pair of adjustment bolts 31 and 32 are arranged on the left LH side of the holder pin 27, and a similar pair of adjustment bolts 33 and 34 are arranged on the right RH side of the holder pin 27. Each adjustment bolt 31
, 32, 33, and 34 are screwed together so as to pass through the free end 9a of the link arm 9, and as shown in FIG. They are screwed together in a pressed state. Incidentally, the adjustment bolts 31 and 32 on the other side are also screwed into the free end portion 9a in a similar state.

Therefore, according to this embodiment, the plurality of adjustment bolts 31, 32, 33, 34 are connected to the cargo holding means 17.
A tilt adjustment mechanism is configured to appropriately change the tilt of the wheel W held at the wheel W.

According to the wheel holding device for a heavy goods transport vehicle having the structure of the above embodiment, when the wheels held by the cargo holding means 17 are lowered from the deck 2 and replaced, the wheels attached to the side of the vehicle body 1 are replaced. After the vehicle body 1 is fixed by the stamping mechanism 40, the wheel W is aligned by vertical movement operation by the elevating drive means 10 and expansion/contraction operation accompanied by horizontal rotation of the link mechanism 3, and this wheel W is moved to the cargo holding means 17. is suspended by the link mechanism 3, but at this time, the balance mechanism 14
The coil spring 16 of the wheel flexes to balance the load of the wheel W with the lifting force of the lifting drive means 10, and the wheel W is suspended in a neutral state, making it possible to adjust minute vertical movements of the wheel W with a light operating force. Wheel replacement work can be easily performed.

When storing the cargo holding means 17 empty or with the wheels W held on the deck 2, it is sufficient to reverse the above-mentioned process, and the parallel link mechanism 4, link arm 9
, the baggage holding means 17 is compactly folded onto the deck 2 with each connecting point as a node, and the baggage holding means 1
7 can be stored in a state substantially parallel to the parallel link mechanism 4.

When carrying out the above operation, as shown by the arrow C in FIGS. 4 and 5, the inclination adjustment screw threaded through the free end 9a of the link arm 9 centering on the holder pin 27 is used. Adjustment bolts 31 and 32 that constitute the mechanism
, 33, 34, the inclination of the bracket 26 with respect to the free end 9a can be adjusted appropriately against the elastic force of the elastic member 37.

That is, these adjustment bolts 31, 32, 33,
Since a plurality of 34 are arranged around the free end 9a, by tightening one to three adjustment bolts selected as appropriate, the load holding means 17 suspended from the bracket 26 can be tightened. The attitude of the wheel W can be changed three-dimensionally, so the inclination of the wheel W held by the load holding means 17 can be freely adjusted, and the alignment with the axle, which is the mating member to be attached, can be adjusted freely. This eliminates the need for extra effort and facilitates positioning with the axle.

In particular, in this embodiment, a plurality of adjustment bolts 31, 32, 33,
34, the structure itself as the inclination adjustment mechanism is simplified, and moreover, the function of adjusting the inclination of the baggage holding means 17 can be sufficiently provided.

[0032]

As described above in detail, the wheel holding device for a heavy goods carrier according to the present invention provides the following effects.

That is, when a large-diameter wheel is held on the cargo holding means, the inclination of the cargo holding means with respect to the free end portion can be adjusted appropriately by operating the inclination adjustment mechanism disposed at the free end portion of the link mechanism. Can be adjusted. Therefore, it becomes possible to freely change the inclination of the wheel held by the load holding means, and it eliminates the need for extra labor for centering the wheel with the axle, which is the mating member to which the wheel is attached. This has the effect of making positioning easier.

Furthermore, as the above-mentioned inclination adjustment mechanism, a plurality of adjusting bolts are screwed to pass through the free end portion, centering on a holder pin from which the cargo holding means is detachably suspended. By using this, the structure of the tilt adjustment mechanism itself can be simplified, and the function as the tilt adjustment mechanism can be exhibited.

[Brief explanation of drawings]

FIG. 1 is a side view showing an embodiment of a wheel holding device for a heavy goods transport vehicle according to the present invention.

FIG. 2 is a plan view of FIG. 1.

FIG. 3 is a side view showing the entire heavy goods transport vehicle to which the present invention is applied.

FIG. 4 is a plan view showing an enlarged main part of FIG. 2;

FIG. 5 is a sectional view of the main part of FIG. 4.

FIG. 6 is a perspective view showing a conventional lifter.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1... Vehicle body, 2... Deck, 3... Link mechanism, 10... Lifting drive means, 14... Balancing mechanism, 17... Luggage holding means, 21...
height adjustment mechanism, 25... holder, 27... holder pin, 2
8...Handle, 31, 32, 33, 34...Adjustment bolt,
36... Supporting member, 37... Elastic member.

Claims (2)

[Claims] Claim 1: A link mechanism disposed on the deck of a vehicle body so as to be swingable in the horizontal and vertical directions, a frame detachably suspended from the free end portion of the link mechanism, and a frame of the frame. In a wheel holding device for a heavy goods transport vehicle, the wheel holding device is provided with a load holding means consisting of a support member that supports the lower end of the wheel placed below. A wheel holding device for a heavy goods transport vehicle, characterized by being provided with a tilt adjustment mechanism for changing the inclination. 2. The inclination adjustment mechanism has a holder pin that removably suspends the cargo holding means from the free end portion of the link mechanism, and the free end is in a state where the tip is pressed against the upper surface of the cargo holding means. 2. The wheel holding device for a heavy goods transport vehicle according to claim 1, further comprising a plurality of adjustment bolts screwed together.