JPH02265807A - Belt conveyer device and roller device for belt conveyer - Google Patents

Abstract

PURPOSE:To enhance the clamping force and the conveying capacity of a belt conveyer device by which articles are conveyed being clamped between a pair of belts, by constituting each of retainer rollers laid on the rear surfaces of the belts, with a pressing roller assembly composed of a plurality of short rollers connected together by joints which can be curved and between which attraction forces are effected. CONSTITUTION:Pressing roller assemblies 38 are disposed between some of retainer rollers 34 arranged in a vertical section through which a main side belt and a follower side belt (not shown) run overlapping with each other. Each of these pressing roller assemblies 38 is composed of a plurality of rollers 44 each consisting of a short roller shaft 40 and a roller body 42 and coupled together with the use of joints 46. Each of the joints 46 is composed of a pair of lengthwise recess groove-like couplers 44 having a U-like cross-sectional shape and a coil spring 56 so as to be curved while a tension is effected between the rollers 44, 44 when the rollers 44 are moved away from other. With this arrangement, it is possible to enhance the clamping force between the belts, and to convey articles surely and stably even through the quantity and the size of articles to be conveyed vary.

Description

DETAILED DESCRIPTION OF THE INVENTION (Technical Field) The present invention relates to a belt conveyor device that can advantageously improve conveyance performance, and a roller device suitable for use in the belt conveyor.

(Background Art) As a type of belt conveyor device that continuously conveys a predetermined object to be conveyed, a predetermined object to be conveyed is conveyed by overlapping two belt-shaped belts and moving them in the longitudinal direction.
Belt conveyor devices in which objects are conveyed by being sandwiched between two belts have been known for a long time, and have been suitably used particularly when conveying objects vertically upward.

In such a belt conveyor device, two overlapping belts are usually placed on both sides in the width direction (
The two belts are designed to be moved while being pressed together in an overlapping state by a presser roller, and a predetermined conveyed object is moved between the two belts at the widthwise central portion between the two belts. It is designed to be conveyed while being pinched by a clamping force exerted based on elasticity.

By the way, in a belt conveyor device having such a structure,
In order to prevent the conveyed object from slipping off between the belts and improve the conveyance performance, it is necessary to ensure sufficient clamping force for the conveyed object sandwiched between the belts. This problem has been addressed by increasing the rigidity of the belt in the width direction, such as by increasing the thickness of the belt or using a belt with a special reinforcement structure.

However, although improving the clamping force by increasing the widthwise rigidity of the belt is effective when the belt width is narrow, when the belt width is wide, the corresponding clamping force cannot be increased by increasing the belt widthwise rigidity. However, this approach was not always effective because it resulted in a significant increase in belt weight and price, and required a large amount of power to drive the belt.

On the other hand, in order to improve the clamping force for conveyed objects in such a belt conveyor device, a double carrier roller with an appropriate trough angle is placed behind both belts, and a suitable spring or other A belt conveyor device has also been proposed in which a clamping force is applied between the belts by pressing the back surface of the belt with a biasing means.

However, in such a belt conveyor device,
Since the trough angle of the carrier roller being pressed is constant, the shape of the sandwiching space for the conveyed object formed between the belts is regulated, so the amount, size, and shape of the conveyed object are etc., there is a problem in that an effective clamping force is no longer exerted.

(Solution A) Here, the present invention has been made against the background of the above-mentioned circumstances, and the problem to be solved is:
It is an object of the present invention to provide a belt conveyor device in which the clamping force exerted on the conveyed object sandwiched between the belts can be advantageously ensured, and the conveyance performance thereof can be effectively improved.

(Solution Means) In order to solve this problem, in the present invention, two belt-shaped belts are overlapped and moved in the longitudinal direction, so that a predetermined conveyed object can be transported between the two belts. In a belt conveyor device that transports the rollers by sandwiching them between the belts, a plurality of rollers are arranged in series, and the roller shafts of the rollers are connected to each other so as to be bendable or curveable, and at least one of the connecting portions of the roller shafts is one of the roller shafts is configured with an extendable joint mechanism, and a tension member is interposed between the connecting roller shafts in the joint mechanism, so that the roller shafts connected by the joint mechanism are separated from each other, so that the roller shafts are separated from each other. The device is characterized in that a micrometer device capable of applying a tensile force to the belt is disposed in the width direction of each of the belts in contact with the back surface of the belt.

Further, the present invention provides a belt conveyor device that conveys a predetermined conveyed object placed on the belt by driving a belt in the longitudinal direction, in which a plurality of rollers are arranged in series, and The roller shafts of the rollers are connected to each other so as to be bendable or curveable, and at least one of the connecting portions of the roller shafts is constituted by an extendable joint mechanism, and a tension member is provided between the connected roller shafts in the joint mechanism. interposed, and the roller device is brought into contact with the lower surface of the belt so that the roller shafts connected by the joint mechanism are separated from each other so that a tensile force is applied between the roller shafts. Another feature of the belt conveyor device is that the belt is supported by such a roller device by being arranged in the width direction thereof.

Furthermore, in the present invention, a plurality of rollers are arranged in series, and the roller shafts of the rollers are connected to each other so as to be bendable or curveable, and at least one of the connecting portions of the roller shafts is extendable. constituted by a joint mechanism, and a tension member is interposed between the connecting roller shafts in the joint mechanism,
Another feature of the roller device for a belt conveyor is that the roller shafts connected by the joint mechanism are separated from each other so that a tensile force is applied between the roller shafts.

(Examples) Hereinafter, in order to clarify the present invention more specifically, examples of the present invention will be described in detail with reference to the drawings.

First, FIG. 1 shows an overall schematic diagram of a belt conveyor device constructed according to the present invention.

In this figure, 1O is a drive side belt that has an endless belt shape, and a rack is passed between the drive side rad pulley 12 and the drive side tail pulley 14, and the drive side belt is extended to the drive side. By being guided by three main drive side return rollers 16 and two curved part forming roller groups 18 arranged between J12 and the main drive side tail pulley 14, the central portion thereof extends in the vertical up and down direction, and both The parts are arranged horizontally.

Moreover, on one side of the main drive side belt 10,
The driven side heald 20, which also has an endless band shape,
A frame is passed between the rad pulley 22 and the tail pulley 24 on the driven side, and the two driven side return rollers 26 and the two It is arranged by being guided by two curved part forming roller groups 18.

These driving side belt IO and driven side belt 2
0, as the RADBOOK IJ12 rotates toward the main drive side, the overlapping parts are moved vertically upward at the same speed in a state where they are overlapped with each other in the vertical part. As a result, a predetermined conveyed object supplied from the input chute 28 to the upper surface of the lower horizontal portion of the driving belt 10 is held vertically upward while being held between the driven belt 20 and the driven belt 20 in the vertical portion. It can be lifted up and conveyed into the discharge chute 30 from the upper horizontal portion.

Furthermore, the driving side belt 10 and the driven side belt 20 are made of an elastic material such as rubber. Furthermore, in the vertical portion where the driving side belt 10 and the driven side belt 20 are overlapped and moved, as shown in FIGS. 2 and 3, there are belts 10 A plurality of presser rollers 34 are disposed by being supported by device frames 32 and 32 disposed on both sides of the width direction of the .20.

These pressing rollers 34 are attached to the driving side belt 10.
and the back side (the surface opposite to the overlapping surface) of both ends in the width direction of the driven side belt 20, and the driving side belt 10 and the driven side belt 20
and are pressed together in an overlapping state at both ends in the width direction, whereby the third
As shown in the figure, the clamping force based on the elasticity of the belts 10.20 can be effectively applied to the conveyed object 36 sandwiched between the belts 10.20. . Note that the presser roller 34 in this embodiment
is the back side of the driving side belt 1o and the driven side belt 20
They are arranged opposite each other in the width direction on the back side of the two.

Furthermore, among the plurality of presser rollers 34, the belt 1
As shown in FIG. 2 and FIG. is installed. As shown in enlarged form in FIGS. 5 and 6, the pressure roller device 38 has a structure in which a roller body 42 is freely rotatably attached to the center of a short roller shaft 40. A plurality of roller shafts 44 (five in this embodiment) are connected to the joint mechanism 4.
It is constructed by interconnecting at 6,
Further, as shown in FIGS. 2 and 4, the roller shafts 40 of the rollers 44 located at both ends thereof are connected to the roller shafts of the presser roller 34 via joint mechanisms 46, respectively. Attached by being connected.

Therefore, in such a joint mechanism 46, as shown in FIGS. 5 and 6, the groove 50 of the coupling fitting 48 is in the form of a longitudinal groove having a U-shaped cross section. The ends of the roller shafts 40, 40 of the rollers 44, 44 to be connected are accommodated at both ends in the longitudinal direction, respectively,
Then, the retaining pin 52 installed across both side walls of the connecting fitting 48 is inserted into the engagement hole 54 provided through the roller shaft 40 in the direction perpendicular to the axis of the connecting fitting 48. Via 48, their roller axes 40.40
It has a structure in which they are connected to each other.

That is, in the roller shafts 40 and 40 connected by such a joint mechanism 46, each of the roller shafts 40, 40 is allowed to rotate around the retaining pin 52, so that the engaging pin 5
They are connected to each other so that they can be bent only in a plane orthogonal to the plane.

In addition, the engagement hole 54 of each roller shaft 40 through which the retaining pin 52 constituting the joint mechanism 46 is inserted is as follows.
The roller shaft 40.
The distance between the roller shafts 40 and 40 is variable, and a coil spring 56 is interposed between the opposing ends of the roller shafts 40 and 40, and is housed in the groove 50 of the connecting fitting 48. The roller shafts 40 and 40 are designed to apply a force in the tensile direction between them.

That is, the roller shaft 40 connected by such a joint mechanism 46
．． 40, when the rollers 44, 44 are separated, a tension force is applied between them by a coil spring 56.

As shown in FIGS. 2 and 4, the pinching roller device 38 is composed of a plurality of rollers 44 connected by such a joint mechanism 46, and the engagement pin 52 in the joint mechanism 46 is , the moving direction of the belt 1O120 (
Each belt 10.
Presser rollers 34 are arranged opposite to each other in the width direction of 20.
34, so that the roller axes 40 of the plurality of rollers 44 are arranged in the width direction of the belt 10.20 and only in the direction perpendicular to the plane of the belt 10.20. It is said to be bendable.

Note that the spacing between the pinch roller devices 38 in the belt movement direction is not particularly limited, but in this embodiment, as is clear from FIG.
The belt is installed between every other presser rollers 34 and 34 arranged to face each other in the width direction on each back surface of the belt in the belt movement direction.

That is, in the pinch roller device 38 as described above,
As shown in FIG. 4, the conveyed object 36 is sandwiched between the driving side belt 10 and the driven side belt 20, and the widthwise center portions of both belts 10 and 20 bulge outward. When the driving side belt 10 and the driven side belt 20 are pressed against each other, the rollers 44 of the respective pinching roller devices 38 that are in contact with the back surfaces of the driving side belts 10 and the driven side belts 20 are pushed in opposite directions based on the tensile force of the coil springs 56. A pressure is exerted on the belt 10.2 against the conveyed object 36.
A clamping force between 0 and 0 can be effectively generated.

Therefore, in the belt conveyor device having the above-described structure, the clamping force on the conveyed object 36 between the driving side belt 10 and the driven side belt 20 is
Since this can be advantageously ensured by the pressing force of 8, excellent conveyance performance can be exhibited without particularly increasing the rigidity of these belts 10 and 20.

In addition, in the pinching roller device 38, since the rollers 44 constituting it are connected to each other in a bendable and expandable manner by a joint mechanism 46, each bell) 10° A substantially uniform contact pressure can be advantageously applied in the width direction of the belts 10, and even when the amount, size, etc. of the conveyed objects 36 change, the belts 10
．． It is possible to follow the deformation of 20 well, and as a result, the above-mentioned excellent clamping force can be stably exerted.

Furthermore, in the pinch roller device 38 in this embodiment, the roller shaft 40 of each roller 44 is connected to the belt 10.20.
Bell 1-10.2 is connected unbendably in the direction of movement of
Since the pressing force relative to zero can be applied more effectively, the clamping force against the conveyed object 36 can be exerted more effectively.

Although one embodiment of the present invention has been described in detail above, this is a literal illustration, and the present invention is not to be construed as being limited only to this specific example.

For example, in the embodiment described above, the pinching roller device 38 was arranged only in the vertical portion of the bell 1-10.20, but it can also be applied to each roller constituting the curved portion forming roller group 18. I can do it.

Further, the specific structure of the joint mechanism 46 is not limited to that of the embodiment described above, and the roller shafts 40 and 40 of the rollers 44 and 44 to be connected can be bent or curved with respect to each other. Any connection may be used as long as it can be connected in such a way that a tensile force can be applied upon displacement in the separating direction, and in particular,
It is not necessary that the direction in which the roller shafts 40, 40 are allowed to bend can be defined. More specifically, for example, it is also possible to use a rubber elastic body instead of the coil spring 56, and furthermore, the two roller shafts 40, 40 can be
A structure in which the coil springs 56 are simply connected can also be adopted.

Furthermore, it is not necessary to employ such a joint mechanism for the connecting portions of the roller shafts 40 of all the rollers 44, and some of them may be flexible connecting portions that only allow bending or curving. It may be configured as follows.

Furthermore, each roller 44 constituting the pinch roller device 38 does not necessarily have to have a structure that allows independent rotation.

Furthermore, in a belt conveyor device equipped with the above-mentioned pinch roller device 38, the pinching force for the conveyed object 36 can be effectively exerted only by the pressing force of the pinch roller device 38. It is also possible to eliminate the pinching of the widthwise ends of the belt by the presser rollers 34.

Furthermore, in the above embodiments, the objects to be conveyed are conveyed vertically upward, but the present invention can be similarly applied to belt conveyor devices that convey objects in an inclined direction or in a horizontal direction. Of course.

Further, as shown in FIG. 7, the rollers 44 constituting the roller device are arranged outside each other depending on the amount and size of the object to be conveyed, that is, the shape of the bell (10.20) during conveyance. By using roller bodies 42 with different diameters, it is also possible to change the pressing surfaces of these rollers 44 against the belt 10.20 in accordance with the shape of the belt 10.20, thereby making it possible to This means that a more effective clamping force can be exerted between them.

Furthermore, a roller device (38) configured as described above.
It can also be advantageously used for a belt conveyor device in which a belt-shaped belt is driven in the longitudinal direction to convey an object placed on the belt. It is possible to support the belt by disposing it in the width direction while coming into contact with the lower surface. In a belt conveyor device having such a structure, the impact when a conveyed object is placed (dropped) on the belt is applied to the roller device (38
) can be advantageously absorbed by the elasticity of
This means that the conveyor device and the conveyed objects can be effectively protected.

In addition, such a roller device (38) can be appropriately employed in other various conveyor devices, and its scope of application is not limited by the above description.

In addition, although not listed, the present invention can be implemented in embodiments with various changes, modifications, improvements, etc. based on the knowledge of those skilled in the art, and such embodiments may be different from the present invention. It goes without saying that any of these are included within the scope of the present invention as long as they do not depart from the spirit of the invention.

(Effects of the Invention) As is clear from the above description, in the belt conveyor device having the structure according to the present invention, the conveyed object sandwiched between the overlapped portions of two belts is Excellent clamping force can be effectively exerted by the roller device arranged on the back side of the belt, and especially when the shape of the belt changes due to changes in the amount or size of the conveyed object, the roller device can effectively exert an excellent clamping force. Since the belt effectively follows the shape of the belt and its clamping force is maintained, extremely excellent conveyance performance can be stably exhibited.

[BRIEF DESCRIPTION OF THE DRAWINGS] FIG. 1 is an overall explanatory diagram showing an outline of a belt conveyor device as an example of an integrated body of the present invention, and FIG. 2 is a partially cutaway view corresponding to the view in the direction of arrow a in FIG. This is an explanatory diagram, and FIG. 3 is an explanatory diagram corresponding to the ■-■ cross section in FIG.
FIG. 4 is an explanatory diagram corresponding to the IV-IV cross section in FIG. 2. Further, FIG. 5 is an enlarged explanatory view of the main part showing the connection part of the pinch roller device used in the belt conveyor device shown in FIG. 1, and FIG. -Vl sectional view. Furthermore, FIG.
FIG. 3 is an explanatory diagram showing another specific example of the pinch roller device used in the belt conveyor device shown in the figure. : Drive side belt: Transported object Two roller shafts: Joint mechanism: Engagement bin: Coil spring 20: Driven side belt 38: Pinch roller device 44: Roller 48: Connecting fitting 54: Engagement hole

Claims (3)

[Claims] (1) By overlapping two belt-shaped belts and moving them in the longitudinal direction, a predetermined object to be conveyed can be transported between the two belts.
In a belt conveyor device that transports sheets by sandwiching them between two belts, a plurality of rollers are arranged in series, and the roller shafts of the rollers are connected to each other so as to be bendable or curveable, and at least one of the connecting portions of the roller shafts is One of the roller shafts is configured with an extendable joint mechanism, and a tension member is interposed between the connecting roller shafts in the joint mechanism, so that the distance between the roller shafts connected by the joint mechanism is increased by mutually separating the roller shafts connected by the joint mechanism. A roller device that allows a tensile force to be applied to
A belt conveyor device, characterized in that it is disposed in the width direction of each of the belts so as to be in contact with the back surface of each of the belts. (2) In a belt conveyor device that conveys a predetermined conveyed object placed on the belt by driving a belt in the longitudinal direction, a plurality of rollers are arranged in series, and the rollers of these rollers are The shafts are connected to each other so as to be bendable or curveable, and at least one of the connecting portions of the roller shafts is constituted by an extendable joint mechanism, and a tension member is interposed between the connected roller shafts in the joint mechanism. do,
A roller device is disposed in the width direction of the belt so as to be in contact with the lower surface of the belt, and the roller device is configured to apply a tensile force to the roller shafts by separating the roller shafts connected by the joint mechanism from each other. A belt conveyor device characterized in that the belt is supported by such a roller device. (3) A plurality of rollers are arranged in series, and the roller shafts of the rollers are connected to each other so that they can be bent or curved,
At least one of the connecting parts of the roller shafts is configured by an extendable joint mechanism, and a tension member is interposed between the connecting roller shafts in the joint mechanism, so that the roller shafts connected by the joint mechanism are mutually connected. A roller device for a belt conveyor, characterized in that a tensile force is applied between the roller axes due to the separation between the rollers.