JPH0344972B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a tire stacking and unloading device, and more specifically, to a tire stacking and unloading device that is capable of reliably stacking and unloading tires of various sizes one by one. This relates to equipment for stacking and unloading tires.

[Prior art]

Conventionally, a stacking device that sequentially stacks a plurality of tires from below in contact with each other has a support arm that supports the bottom surface of the tire located at the bottom, and a support arm that supports the bottom surface of the tire that is stacked from the bottom. There was a problem in that it was necessary to release the support of the tire just before it came into contact with the bottom surface of the tire at the bottom, and it was extremely difficult to control the timing. Furthermore, if the support arm was not released in a timely manner, the center of the stacked tires would shift, the load would collapse, and the tires could not be stacked in a stable manner.

Additionally, it is necessary to change the position of the tire support arm depending on the size of the tire, and there is a problem in that it takes a lot of time and effort to change the position.
Another problem with conventional equipment is that it is not possible to load and unload tires one by one.

[Purpose of the invention]

This invention was devised by focusing on the conventional problems, and its purpose is to efficiently stack tires one by one in a stable condition, regardless of the size of the tires. The present invention provides a tire stacking and unloading device that can load and unload tires.

[Structure of the invention]

In order to achieve the above-mentioned object, this invention has a center comprising four centering arms rotatably supported at the bottom of a conveyor, and a link mechanism that synchronously expands and contracts these four centering arms. A ring device and a tire lifting device for lifting and lowering the tire centered by the centering device are provided, and a swingable tire support arm having a parallel link is provided on a side of the centering device, and the tire support arm. A rotatable air cylinder is disposed at the tip of the tire support arm to support the lower shoulder portion of the tire and the tread portion of the tire that are pushed up or lowered by the tire lifting device. The gist is that a support member is provided.

[Embodiments of the invention]

Embodiments of the present invention will be described below based on the accompanying drawings.

1 and 2 show a plan view of a tire stacking and unloading device according to the present invention, in which 1 is a conveyor for carrying tires W installed on a support frame 2, and 3 is a conveyor for carrying tires W installed on a support frame 2; A tire W centering device provided, 4 is a conveyor 1
5 indicates a plurality of (four in this embodiment) tire support arms installed on both sides of the centering device 3.

The conveyor 1 has a plurality of rollers 1a arranged on a support frame 2 at predetermined intervals and in parallel with each other at intervals in the center of the longitudinal direction. The centering device 3 is composed of four centering arms 3a rotatably supported on the support frame 2, and a link mechanism 6 that synchronously expands and contracts the four centering arms 3a. A guide roller 7 that rotatably supports the tire W is provided at the tip of the centering arm 3a.

Further, the tire lifting device 4 includes a lifting cylinder 8 (air cylinder) supported by the support frame 2.
It is composed of four support plates 9 that support the lower surface of the tire W at the upper end of the rod 8a, and a rotation prevention rod 10 connected to the support plates 9. is configured to appear and retract from the upper surface of the roller 1a of the conveyor 1.

Further, the tire support arms 5 installed on both sides of the centering device 3 are configured as parallel links by a plurality of arms, and the base end of the tire support frame 5 is connected to a bracket fixed on the support frame 2. 11 via a pin 12 so as to be rotatable. Further, the inner arm of the tire support arm 5 is connected to and supported by an air cylinder 14 supported by the bracket 11.

A support member 15 such as a roller that supports the lower shoulder portion W1 of the tire W and a support member 16 such as a roller that supports the tire tread portion W2 are attached to the upper end of the tire support arm 5. , 16 stacks the lower shoulder part W1 and tire tread part W2 of the tire W,
This is to support during loading and unloading.

Next, the action of the tire support arm 5 when stacking tires W will be explained with reference to FIGS. 3 to 8.

Tires W being transported by the transport conveyor 1
After the tire W is centered by the centering device 3, the lifting cylinder 8 of the tire lifting device 4 is extended and the tire W is lifted by the support plate 9 (see FIG. 3).

At this time, the tire support arm 5 is maintained in an open state by the air cylinder 14.

When the tire W is raised to the upper limit by the tire lifting device 4, the air in the air cylinder 14 is released to the atmosphere, and the tire support arm 5 is moved up as shown in FIG.
swings under its own weight until the support member 16 comes into contact with the tread portion W2 of the tire W (see FIG. 6).
Next, the tire W is lowered by the tire lifting device 4, and at this time, the lower shoulder portion W1 is supported by the support member 15 provided at the tip of the tire support arm 5 (see FIG. 6).

Then, while the tire W is supported by the support member 15, the tire lifting device 4 descends to its lower limit.

Next, the next tire Wa conveyed by the conveyor 1 is centered by the centering device 3 in the same way as shown in FIG. Lift the tire Wa (see Figure 7).

At this time, since the support member 15 provided at the tip of the tire support arm 5 supports the tire shoulder portion W1 of the tire W, the lower surface of the first stacked tire W and the second tire
The upper surface of Wa is raised in contact with the upper surface of Wa.

At this time, the air in the air cylinder 14 is exposed to the atmosphere, and therefore, the tire support arm 5 is swung outward by the tire Wa via the support member 15 (see FIG. 8). ).

When the tire Wa further rises and passes the support member 15, the tire support arm 5 swings inward due to its own weight as shown in FIG. supports the tire Wa and supports the support member 1.
6 is in contact with the tire tread part W2 and the tire Wa
It supports

When the tire lifting device 4 is lowered from such a state, the lower shoulder portion W1 of the stacked tires Wa is supported by contacting the support member 15 of the tire support arm 5, and the tire lifting device 4 is lowered. Descend to the original position leaving the tire W in place.

Such operations are performed on tires Wb, tires Wc, tires Wd, which are transported by the transport conveyor 1.
This is done sequentially for Wx.

Incidentally, small-diameter tires w ₁ to wx can also be stacked by the action of the tire support arm 5 similar to that described above.

Next, Figures 10 to 14 show the operation when loading and unloading a predetermined number of tires Wx stacked one by one.
This will be explained based on the diagram.

First, as shown in FIG. 10, when a specified number of tires are piled up, the lifting cylinder 8 of the tire lifting device 4 is operated to extend, and the entire tire W is lifted by the support plate 9.

At this time, the air cylinder 14 is extended and the tire support arm 5 is in the open state (11th
(see figure).

Next, the entire tire W is lowered by the tire lifting device 4, and when the lower surface of the lowest tire Wx blocks light from the detection switch 17 such as a phototube, the air cylinder 14 is activated to contract and the tire support arm 5 is moved in the closing direction. is swayed by.

Then, the support member 16 provided at the tip of the tire support arm 5 is connected to the lowermost tire that is being lowered.
It comes into contact with the tread portion W2 of Wx, and the swinging stops in this state (see Fig. 12).

Then, when the tire Wx is further lowered by the tire lifting device 4, the support member 15 moves to the next tire.
Wd (second from the bottom) tire shoulder part W1
This is to support other tires Wx that have entered and are stacked on top of each other.

Then, when the tire Wx is further lowered by the tire lifting device 4, the tires Wa to Wx located above the tire Wx to be carried out are supported by the tire support arm 5 (see FIG. 13). The tire Wd that has reached the top of the transport conveyor 1 is carried out while being placed on the transport conveyor 1 (14th
(see figure). By repeating the above operations, the tires Wa, b, c,
d and x are loaded and unloaded one by one and transported outside.

Furthermore, when loading and unloading tires, it is possible to reliably load and unload one tire at a time, regardless of tire size.

By repeating the above operations, it is possible to stack and stock multiple tires W while centering them, and also to unload the stacked tires Wx one by one for the next process. can be transported efficiently.

〔Effect of the invention〕

As described above, this invention provides a centering device comprising four centering arms rotatably supported at the bottom of a conveyor and a link mechanism that synchronously expands and contracts these four centering arms. and a tire lifting device for lifting and lowering the tire centered by the centering device, and a swingable tire support arm having a parallel link on the side of the centering device, and supporting the tire support arm. an air cylinder that is pushed up by the tire lifting device at the tip of the tire support arm;
Or, by providing a rotatable support member that supports the lower shoulder part and tread part of the unloaded tire, regardless of the size of the tire,
It is possible to reliably stack and unload tires one by one in a stable condition, making it possible to store a large number of tires in a small amount of space, and also to be able to transport each tire reliably. be. Furthermore, since the tires are stacked and unloaded in a centered state, there is no possibility of the load collapsing, and work can be carried out in a stable state, which has the effect of significantly improving work efficiency.

Furthermore, since a rotatable support member is provided at the tip of the tire support arm to support the lower shoulder part of the tire and the tread part of the tire, contact with the tire is smooth and it is easy to change the tire size. This has the advantage that accompanying setup changes can be easily performed.

[Brief explanation of drawings]

Figure 1 shows a stack of tires implementing this invention.
A plan view of the loading/unloading device, Figure 2 is a front view of Figure 1,
Figure 3 is an enlarged front view when stacking tires, Figure 4~
FIG. 9 is an explanatory diagram showing the sequence of operations when stacking tires, and FIGS. 10 to 14 are explanatory diagrams showing the operation of unloading the stacked tires one by one. DESCRIPTION OF SYMBOLS 1... Conveyance conveyor, 3... Centering device, 4... Tire lifting device, 5... Tire support arm, 15, 16... Support member, Wa~Wx...
Tire, W1... Tire shoulder section, W2...
Tire tread section.

Claims (1)

[Claims] 1. A centering device consisting of four centering arms rotatably supported at the bottom of the conveyor and a link mechanism that synchronously expands and contracts these four centering arms, and this centering device. A tire lifting device that lifts and lowers a centered tire is provided, and a swingable tire support arm having a parallel link and an air cylinder that supports this tire support arm are arranged on the side of the centering device. death,
A tire characterized in that a rotatable support member is provided at the tip of the tire support arm to support a lower shoulder portion and a tread portion of the tire pushed up or lowered by the tire lifting device. loading and unloading equipment.