JP3388326B2 - Curve conveyor - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a curved conveyor.

[0002]

2. Description of the Related Art As a curve conveyer, there is a type shown in FIG. 8. This conveyer has a knife edge 90, which is arranged at a predetermined angular interval, as shown in FIGS.
90 and a free roller shaft 9 provided therebelow
1 and 91 (having a plurality of free rollers on the shaft) are used to stretch the conveyor belt 92, and the conveyor belt 92 is rotationally driven by a chain 93 provided on the outer peripheral side of the conveyor belt 92. I am trying. As shown in FIG. 8, the chain 93 is constrained by a guide 94 in a plane locus along the outer peripheral edge of the conveyor belt 92, while the transmission of power from the chain 93 to the conveyor belt 92 is As shown in FIG. 10 and FIG. 11, a belt hooking member P1 on the side of the conveyor belt 92, a belt hooking member P2 on the chain 93 side that is on the same plane as the belt hooking member P1, and a belt hooking member provided between these belt hooking members. The transmission means 95 is composed of the power transmission belt B thus formed.

As shown in FIG. 8, the chain 93 is driven by the sprockets 96, 97, 98 and the chain 99.
Is performed by the motor M via the.

In this curved conveyor, the drop D at the joint portion with other conveyors can be made constant and small over the entire width as compared with a curved conveyor having a drive shaft as a taper roller (knife edge type). (See FIG. 12 and the tapered roller type FIG. 13),
Therefore, small articles can be transported smoothly.

However, in this curved conveyor, the guide 94, the transmission means 95 and the like have a complicated structure, resulting in high cost, and the chain 93 moves while rubbing against the guide 94 while being pulled inward. There is a problem in that the transmission efficiency of the driving force is low, and the knife-edge type is adopted, which shortens the life of the belt. If the knife edges 90, 90 are replaced by free roller shafts, the shortening of the belt life can be solved, but the problems of high cost and transmission efficiency cannot be solved.

[0006]

SUMMARY OF THE INVENTION Therefore, the present invention provides a curved conveyor which has a constant and small drop in the joint portion with other conveyors, can be manufactured at a relatively low cost, and does not shorten the life of the belt. This is an issue.

[0007]

A curved conveyor according to the present invention has a plurality of free rollers 10 arranged at predetermined angular intervals, and the free roller shafts 1 and 1 mutually. A loop-shaped transport belt 2 stretched between the two, and a locking means 3 of a type in which the outer edge of the transport belt 2 is sandwiched by upper and lower rotating bodies to prevent the transport belt 2 from moving inward. And a drive shaft 4 provided in the loop of the conveyor belt 2, and the drive shaft 4
And a drive belt 5 for transmitting the rotation of the free roller 10 to the free roller 10, and the rotation of the drive shaft 4 causes the free roller 10 located on the outer side to the free roller 1 located on the inner side.
The rotation speed is higher than 0.

The driving belt 5 can be replaced with a driving chain.

[0009]

The present invention operates as follows.

The conveyor belt 2 includes a large number of free rollers 10.
Since it is stretched between the free roller shafts 1 and 1 arranged at a predetermined angular interval, the drop of the joint portion with other conveyors is constant and small over the entire width, and Unlike the knife edge type, the life of the conveyor belt 2 is not shortened.

Further, since the inward movement of the conveyor belt 2 is prevented by the upper and lower rotating bodies, its structure is very simple as compared with the one described in the section of the prior art.

Further, the drive shaft 4 is formed by using the drive belt 5 (or drive chain) in a usual manner (ideal manner).
Since the rotational force is transmitted to the free roller 10, the transmission efficiency of the driving force is better than that in the section of the related art.

In this curved conveyor, the rotation of the drive shaft 4 causes the free rollers 10 located outside to rotate at a higher speed than the free rollers 10 located inside. Even though the free rollers 10 have the same diameter, they function similarly to those using a taper pulley, and as a result, the free rollers 10 and the conveyor belt 2 that are rotationally driven.
There is almost no slippage between. Therefore, the movement of the curved conveyor becomes smooth.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings shown as embodiments.

As shown in FIG. 1 and FIG. 2, the curved conveyor of this embodiment is basically a frame 7 formed in an arc shape, and upper and lower free frames provided at the ends of the frame 7, respectively. The roller shaft 1, the loop-shaped transport belt 2 stretched between the free roller shafts 1 and 1, and the outer edge of the transport belt 2 for preventing the transport belt 2 from moving inward. It has a locking means 3 of a sandwiching type. As shown in FIG. 5, a drive shaft 4 is provided in the loop of the conveyor belt 2 and the drive shaft 4 is provided.
Is transmitted to the free rollers 10a, 10b, 10c of the free roller shaft 1 via the drive belt 5, and thereby the transport belt 2 is rotationally driven.

The frame 7 is, as shown in FIGS. 1 to 3,
Inner / outer pedestal 7 made of 90 ° arc-shaped angle material
0, 71, brackets 72 provided on the upper and lower end surfaces of the inner and outer pedestals 70, 71, and support members 73, 74 provided between the brackets 72, 72 of the inner and outer pedestals 70, 71. And a belt mounting plate 75 installed between the supporting members 73 and 74.
The upper and lower free roller shafts 1 are erected between the inner and outer pedestals 70 and 71 by using 5,75.

As shown in FIGS. 2 and 4, the free roller shaft 1 is composed of a main shaft 11 and a plurality of free rollers 10 rotatably fitted on the main shaft 11.
3 out of 0 (10a for the outer one and 10 for the middle one)
A peripheral groove 12 for hanging the driving belt 5 is formed on the inner side b and the inner side 10c). The upper surface position of the belt mounting plate 72 is set corresponding to the upper surface position of the free roller 10 on the upper free roller shaft 1.

As shown in FIG. 3, the conveyor belt 2 has a fan-shaped loop shape in a plan view, and has a thick portion 20 (called a bead) as a constituent portion of the engaging means 3 on its outer peripheral edge. It is provided.

As shown in FIG. 3, the locking means 3 is rotatably attached to the thick portion 20 and the fixed portion of the support member 74, and clamps the base end portion 31 of the thick portion 20. It is composed of a large number of upper and lower rotating bodies 32 and 33, and the conveyor belt 2 is composed of the upper and lower rotating bodies 32 and 33.
The upper / lower rotating body 3 without blocking the movement in a predetermined direction.
2, 33 and the thick portion 20 are engaged with each other, and the conveyor belt 2
Is blocked from moving inward. In this example,
The upper and lower rotating bodies 32 and 33 are composed of bearings, and the inner race of the bearing is supported and fixed, and the outer race serves as a rotating portion.

The drive shaft 4 is designed so that the rotation of the motor is transmitted by a sprocket, a chain and the like (not shown). As shown in FIGS. 1 and 4, a large diameter pulley 40 is provided on the outer side of the drive shaft 4. A medium diameter pulley 41 is attached to the middle portion, and a small diameter pulley 42 is attached to the inner portion.

As shown in FIG. 6, a so-called round belt having a circular cross section is used as the driving belt 5, and as shown in FIGS. 4 and 5, between the large diameter pulley 40 and the outer free roller 10a, It is stretched between the medium diameter pulley 41 and the intermediate free roller 10b, and between the small diameter pulley 40 and the inner free roller 10c.

Large, medium and small diameter pulleys 40, 41, 42
The effective diameter of is in the state where the conveyor belt 2 is rotationally driven by the free rollers 10a, 10b, 10c,
The values are set so that slippage does not occur between them.

Since this curved conveyor is constructed as described above, the rotation speed of the drive shaft 4 is such that the rotational speed of the free roller is: free roller 10a> free roller 10b> free roller 10c. Therefore, the belt tension member is the same. Even though it is a free roller with a diameter, it works similarly to the one using a tapered pulley. Then, in this curved conveyor, as described in the section of action, the drop of the joint portion with other conveyors is constant and small over the entire width, and the transport belt 2 is not shortened, and further, The transmission efficiency of the driving force is good.

In the above embodiment, the drive shaft 4 has large, medium, and
Although the small-diameter pulleys 40, 41, 42 are provided, the outer peripheral surface of the drive shaft 4 itself is formed to have large, medium, and small diameters from the outside of the conveyor to the inside and is not limited to these diameter portions. The driving belt 5 may be stretched between the rollers.

Further, the large, medium and small diameter pulleys 4 of the above embodiment
The 0, 41, and 42 may be large, medium, and small sprockets, and a drive chain may be stretched between these sprockets and the free rollers. In this case, a circumferential groove is provided on the outer periphery of the sprocket 10 so that the driving chain and the conveyor belt 2 do not come into contact with each other, and a plurality of teeth that mesh with the driving chain are formed inside the circumferential groove. Good.

Further, as the driving belt 5, a toothed belt, a flat belt, a square belt or the like can be used.

In the above embodiment, in order to secure a space for providing the drive shaft 4 in the loop-shaped transport belt 2, another free roller shaft is provided below each of the two upper free roller shafts 1 in the vicinity thereof. However, the present invention is not limited to this, and as shown in FIG. 7, an intermediate roller R may be provided below the middle of the free roller shafts 1, 1.

[0028]

The present invention having the above-mentioned structure has the following effects.

From the contents described in the column of action, the drop in the joint portion with other conveyors is constant and small,
A curved conveyor that can be manufactured at a relatively low cost and that does not shorten the life of the belt can be provided.

[Brief description of drawings]

FIG. 1 is a plan view of a curve conveyor according to an embodiment of the present invention.

FIG. 2 is a view showing a mounted state of a free roller shaft of the curved conveyor.

FIG. 3 is a sectional view of a locking means of the curved conveyor.

FIG. 4 is a perspective view showing a relationship between the free roller shaft, a pulley provided on a drive shaft, and a drive belt.

FIG. 5 is a side view showing a relationship among the free roller shaft, a pulley provided on a drive shaft, a drive belt, and a conveyance belt.

FIG. 6 is a view showing a state in which a drive belt is fitted in a circumferential groove of a free roller of the free roller shaft.

FIG. 7 is an explanatory diagram of another embodiment of the present invention.

FIG. 8 is a plan view of a prior art curved conveyor.

FIG. 9 is a diagram showing a relationship between a conveyor belt, a knife edge, and a free roller in a conventional curved conveyor.

FIG. 10 is a plan view showing a structure for transmitting a rotational driving force to a conveyor belt in a conventional curved conveyor.

FIG. 11 is a side view showing a structure for transmitting a rotational driving force to a conveyor belt in a curved conveyor of a prior art.

FIG. 12 shows a knife-edge type curved conveyor,
FIG. 6 is a perspective view showing a depressed state of a joint portion with another conveyor.

FIG. 13 is a perspective view showing a depressed state of a joint portion with another conveyor in a curved conveyor using a taper roller.

[Explanation of symbols]

1 roller shaft 2 Conveyor belt 3 locking means 4 drive shaft 5 drive belt 10 free rollers

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Claims (2)

(57) [Claims] 1. A free roller shaft (1) (1) having a large number of free rollers (10) and arranged at predetermined angular intervals, and these free roller shafts (1).
(1) A loop-shaped transport belt (2) stretched between the two and an outer edge of the transport belt (2) by upper and lower rotating bodies to prevent the transport belt (2) from moving inward. A locking means (3) for holding the drive shaft, a drive shaft (4) provided in the loop of the conveyor belt (2), and the rotation of the drive shaft (4) transmitted to the free roller (10). And a drive belt (5) for rotating the drive shaft (4) so that the outer free roller (10) is rotated at a higher speed than the inner free roller (10) by the rotation of the drive shaft (4). A curved conveyor characterized by the fact that 2. Free roller shafts (1) (1) having a large number of free rollers (10) and arranged at predetermined angular intervals, and these free roller shafts (1).
(1) A loop-shaped transport belt (2) stretched between the two and an outer edge of the transport belt (2) by upper and lower rotating bodies to prevent the transport belt (2) from moving inward. A locking means (3) for holding the drive shaft, a drive shaft (4) provided in the loop of the conveyor belt (2), and the rotation of the drive shaft (4) transmitted to the free roller (10). And a drive chain for rotating the drive shaft (4) so that the free roller (10) located outside is rotated at a higher speed than the free roller (10) located inside. Curve conveyor characterized by.