JPH06247514A - Conveying system - Google Patents

Abstract

PURPOSE:To make the conveying device compact, by engaging parts of planar drive wheels located in a curved part of a free roller, with the outer periphery of a pallet so as to drive and feed the pallet. CONSTITUTION:A conveying system comprises a long frame-like free-roller 26 horizontally extended, and a pair of planar drive wheels 28, 28 adapted to be driven by a drive motor and having rotary axes which coincide respectively with the center positions of curvatures of semicircular curved parts 26a, 26b at both ends of the free roller 26. The free roller 26 is composed of inner free rollers 26c and outer free rollers 26d which are laid outside the inner free rollers 26c with a slight gap therebetween. disc-like pallets 40 are coupled to an endless chain 30 which is stretched between by means of pins, at equal intervals in the longitudinal direction. Further, the outer periphery of each of the pallets 40 carrying thereon a plurality of roll-like articles is engaged with an arcuate engaging part o the planar drive wheel 28 so as to drive and feed the pallets 40.

Description

Detailed Description of the Invention

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a horizontal rotary pallet moving device suitable for vertical storage and storage of a plurality of rolls.

[0001]

2. Description of the Related Art Conventionally, as a transfer system of this type,
As shown in FIGS. 12 and 13, the free roller 2 is horizontally arranged in an elongated frame shape, and an endless chain 4 with a roller 3 is stretched so as to circulate along the central portion of the free roller 2. , A plurality of circular pallets 6 placed on the free rollers 2
It is known that the center of the chain is connected to the endless chain 4 at regular intervals by the pin 8.

In this conveying system, the curved portion 2a of the free roller 2 faces the passage side 10 side, and the endless chain 4 is circularly driven by the sprocket 18 of the motor 16 to form a desired roll shape vertically placed on the pallet 6. Curve part 2 with object 12
The roll-shaped material 1 that has been moved to a and carried out by the forklift 14, or conversely carried by the forklift 14.
2 is used for placing and storing the empty pallet 6 on the curved portion 2a.

[0003]

In the above-mentioned conventional system, the motor 16 for driving the endless chain 4 and the sprocket 18 must be arranged below the free roller 2, so that from the foundation G to the free roller 2. The height H increases, and the supporting frame 20 of the free roller 2 and the like become large in size, resulting in high cost. Also forklift 1
Since the vertical movement width of the roll-shaped material 12 by 4 becomes large, the efficiency of the carry-out / carry-in work is also poor.

An object of the present invention is to minimize the height of the free roller by adopting a novel pallet moving mechanism instead of the chain drive, thereby making the supporting frame of the free roller compact, and efficiently operating the roll-shaped material by the forklift. It is to provide a transportation system that enables unloading and loading.

[0005]

A feature of the present invention is that instead of non-driving the endless chain connecting the pallets, the inside of the curved portion of the free roller is substantially level with the free roller. A plate-shaped drive wheel having a plurality of engaging portions that are detachably engaged with the outer periphery of the pallet and that can move the pallet along the free roller is provided at the outer peripheral portion at equal intervals, and the plate-shaped drive wheel is a drive means. It was decided to rotate with.

[0006]

Since the plate-shaped drive wheel is located inside the curved portion, its axial position deviates from the free roller, so that the free roller can be brought to the minimum height by approaching the foundation as much as possible, while driving the plate-shaped drive wheel. The means can optionally be arranged above or below the plate drive wheel independent of the free rollers. In this respect, in the case of the conventional endless chain drive system, the chain drive device must necessarily be arranged below the free roller, so that there is a limit in lowering the height of the free roller.

[0007]

An embodiment of the present invention will be described below with reference to the drawings. As shown in FIG. 1 and FIG. 2, a transport system 24 according to the present invention includes an elongated frame-shaped free roller 26 extending in the horizontal direction, and semi-circular curve portions 26 a at both ends of the free roller 26. It has a pair of plate-shaped drive wheels 28, 28 having a rotation axis that coincides with the center position of the curvature 26b, and motors 30, 30 for driving the drive wheels 28, 28.

The free roller 26 is, as shown in detail in FIG. 3, an inner free roller 26c and an inner free roller 2
6 c and an outer free roller 26 d which is arranged with a slight gap from 6 c, and each free roller 26 c, 26 d is supported by a compact support frame 32 placed on the foundation G and having a small vertical width.

An endless chain 36 with a roller 34 is stretched between the inner and outer free rollers 26c and 26d as shown in FIGS. 4 and 5, and a pair of left and right roller guides standing upright on both sides of the endless chain 36. The rollers 34 of the endless chain 36 roll along 38.

Circular pallets 40 are placed on the upper surface of the free rollers 26 at equal intervals. As shown in FIGS. 5 and 6, the long holes 41 formed at the centers of the pallets 40 are fitted to the upper side of the endless chain 36. The upper end of the pin 42 extending from the link plate 37 is loosely fitted. A retaining ring 43 is fixed to the upper end of the pin 42 to prevent the pallet 40 from rising.

Inside the free roller 26, as shown in FIG. 2, a deck 44 for supporting the plate-shaped drive wheel 28 and the motor 30 is disposed so as to slightly project from the upper surface of the free roller 26. The rotating shaft of the plate-shaped drive wheel 28 is pivotally supported by the overhanging portions 44a, 44a at both ends of the deck 44. The motor 30 is disposed on the upper side of the overhanging portion 44 a, and the drive shaft of the motor 30 and the rotation shaft of the drive wheel 28 are connected via a reduction gear 46.

As shown in FIG. 1, the plate-like drive wheel 28 has four engaging portions 48 formed by arcuate notches capable of engaging with the outer periphery of the circular pallet 40 at 90 ° intervals on the outer periphery thereof. There is. The cross section of the edge of the engagement portion 48 is formed in a sagittal shape as shown in FIG.
A V-shaped groove portion 50 is formed on the outer peripheral edge of so as to match the sagittal edge shape of the engaging portion 48. As for the engagement state between the engaging portion 48 and the outer periphery of the pallet 40, as shown in FIG. 7B, a groove portion 51 having a U-shaped cross section is formed on the outer peripheral edge of the pallet 40, and the shape of the edge of the engaging portion 48 is You may make it match with the groove part 51. On the contrary, the outer peripheral edge of the pallet 40 may be convex, and the edge of the engaging portion 48 of the drive wheel 28 may be concave.

The transport system 24 is constructed as described above,
When the motor 30 is driven to rotate the plate drive wheel 28, the pallet 40 of the curved portions 26 a and 26 b engaged with the cutout 48 of the drive wheel 28 is moved in the rotation direction of the drive wheel 28. . At this time, pallet 4
Since the center of 0 is rotatably connected to the endless chain 36 by the pin 42, the pallet 40 is attached to the curved portion 26a,
Movement around 26b is smooth. Although the endless chain 36 may slightly expand due to long-term use, the pin 42 is loosely fitted in the long hole 41 of the pallet 40, so that the endless chain 36 can be expanded without any problem.

Since the pallets 40 are connected to each other by the endless chain 36, the pallets 40 other than the curved portions 26a and 26b are also pulled by the pallet 40 of the curved portions 26a and 26b through the endless chain 36 and are laid on the free roller 26. Move along.

The plate-shaped drive wheel 28 has a curved portion 26a,
26b into the V-shaped groove 50 on the outer periphery of the pallet 40 of FIG.
Since the engagement is performed as in (A), the so-called pallet 40 dance phenomenon in which the outer periphery of the pallet 40 unexpectedly disengages from the engaging portion 48 and floats when the pallet 40 is moved is prevented.

When the desired roll-shaped material 12 placed on the pallet 40 moves to the curved portion 26a or 26b, the motor 30 is temporarily stopped and the roll-shaped material 12 is carried out by the forklift. When the roll-shaped material 12 is carried into the transport system 24, the empty pallet 40 is stopped at the curved portion 26a or 26b, and the roll-shaped material 12 is placed on the pallet 40 by a forklift. Motor 30
Can be rotated in the normal and reverse directions, and the rotation direction is appropriately changed so that the desired roll-shaped material 12 on the free roller 26 can be quickly moved to the curved portion 26a or 26b.

Although one embodiment of the present invention has been described above, the present invention is not limited to the above embodiment and various modifications can be made. For example, in the above embodiment, two plate-shaped drive wheels 28 are provided. Although used, when the number of pallets 40 is small and the load is relatively small, only one of them may be a drive wheel and the other may be an idle wheel.

In the above embodiment, the center of the pallet 40 is connected to the endless chain 36 by the pin 42. However, if it is not desired to rotate the pallet 40 with respect to the endless chain 36, as shown in FIG. The point may be connected to the endless chain 36 by the pin 52. In this case, as shown in FIG. 9, two points eccentric to the inside of the free roller 26 from the center of the pallet 40 may be joined to the endless chain 36,
Thereby, the pitch interval of the roll-shaped material 12 when the pallet 40 is engaged with the plate-shaped drive wheel 29 at the curved portion 26a can be made larger than the pitch interval at the linear portion 26c.

In the above embodiment, the pallet 40 is placed on the free roller 26 without a clear space.
As described above, for example, three clear spaces 54 are provided, the free roller 26 is a drive type roller 26 ′, and the pallet 40 can be moved by the drive type roller 26 ′ and the drive wheel 28 without being connected by the endless chain 36. . In this case, the drive roller 26 'can be partially driven to rapidly move the desired pallet 40 or the roll-shaped material on the pallet 40 to the curved portions 26a and 26b.

In the above embodiment, the motor 30 is arranged on the deck 44. However, as shown in FIG. 11, a pit 56 is excavated below the plate drive wheel 29, and the motor 30 is arranged in the pit 56. can do. In the structure using the deck 44, if the mutual spacing of the drive wheels 28 becomes short, it becomes difficult to secure a sufficient lateral width dimension of the base portion 44b of the deck 44 as can be seen from FIG.
In the structure in which 0 is arranged in the lower part of the drive wheel 28, there is no inconvenience even if the distance between the drive wheels 28 becomes short.

[0021]

As described above, according to the present invention, in the curved portion of the free roller, the engaging portion of the plate-shaped drive wheel disposed inside the curved portion is engaged with the outer periphery of the pallet on the free roller to form the pallet. Since it is driven and fed, the drive device for the endless chain, which is disposed below the free roller in the conventional device, can be eliminated, and the height of the free roller can be reduced accordingly. As a result, the support frame of the free roller can be made short and compact, and the vertical movement distance of the item on the pallet can be shortened, so that the efficiency of the loading / unloading work can be improved.

When two points eccentric to the inside of the free roller from the center of the pallet are connected to an endless chain,
The pitch interval of the pallets can be increased at the curved portion, which facilitates loading and unloading of the items on the pallets. This means that the pallet pitch interval in the straight portion of the free roller can be made narrower than in the conventional case, and the entire apparatus can be made compact.

[Brief description of drawings]

FIG. 1 is a plan view of a transfer system according to the present invention.

FIG. 2 is a side view of the device.

FIG. 3 is an enlarged sectional view taken along the line III-III of FIG.

FIG. 4 is an enlarged plan view of a pallet on a free roller.

5 is a cross-sectional view taken along the line VV of FIG.

FIG. 6 is an enlarged plan view of the center of the pallet.

FIG. 7A is a side view showing an engagement state between a pallet and a drive wheel, and FIG. 7B is a side view showing a modified example of the same portion.

FIG. 8 is a side view similar to FIG. 5, showing a coupling structure of a pallet and an endless chain when the orientation of the pallet is not changed.

FIG. 9 is a partial plan view of the transfer system when the orientation of the pallet is not changed.

FIG. 10 is a plan view of a transfer system according to still another embodiment of the present invention.

FIG. 11 is a sectional view of a transfer system according to still another embodiment of the present invention.

FIG. 12 is a plan view of a conventional pallet transport system.

FIG. 13 is a vertical sectional view of a free roller of the system.

[Explanation of symbols]

 24 Conveyor System 26 Free Rollers 26a, 26b Curved Part 28 Plate Drive Wheel 30 Motor 32 Support Frame 34 Roller 36 Endless Chain 40 Pallet 41 Long Hole 42 Pin 44 Deck 48 Plate Drive Wheel Engagement Part 50 Pallet Peripheral Groove Part

Claims (7)

[Claims] 1. An annular free roller extending in a horizontal direction, an endless chain stretched along the free roller so as to be circulatively movable, and an endless chain mounted on the free roller. A plurality of pallets connected to each other at equal intervals, and a plate-like drive wheel rotatably arranged at substantially the same height as the free roller inside at least one curved portion of the free roller. , The plate-like drive in which a plurality of engaging portions which are detachably engaged with the outer periphery of the pallet and are movable along the free roller on the outer periphery of the plate-like drive wheel are formed at equal intervals. A transport system comprising a wheel and a drive means for rotating the plate drive wheel. 2. The transport system according to claim 1, wherein the center of the pallet is rotatably connected to the endless chain via a pin. 3. The transport system according to claim 1, wherein at least two positions of the pallet are connected to the endless chain via pins. 4. The transport system according to claim 3, wherein two points eccentric to the inside of the free roller from the center of the pallet are connected to the endless chain via pins. 5. The transport system according to claim 1, wherein a groove portion which can be engaged with an engaging portion of the plate-like drive wheel is formed on an outer peripheral edge of the pallet. 6. The transport system according to claim 1, wherein the drive means is arranged in a pit formed below the plate-like drive wheel. 7. An annular drive type roller extending horizontally, a plurality of pallets mounted on the drive roller while leaving an empty space for at least one pallet, and the drive roller. A plate-shaped drive wheel that is rotatably disposed at substantially the same height as the drive roller inside at least one curved portion of the pallet. A plate-shaped drive wheel having a plurality of engaging portions that are detachably engaged and that can move the pallet along the drive roller at equal intervals; and a drive unit that rotates the plate-shaped drive wheel. A transport system characterized by being provided.