JPH06135523A - Power transmission device and roller conveyer - Google Patents

Abstract

PURPOSE:To provide a roller conveyer constituted so as to facilitate the exchange of a ring belt which is a power transmitting means. CONSTITUTION:A ring belt 6 is run without passing a rotating drive source such as a drive ring 3 and guide members 4, 21a, 21b, 22 through the ring belt 6, and carrier rollers 5, 5a, 5b where the ring belt 6 is engaged so that they may pass through the ring belt 6 at both the ends of the ring belt 6, in other words, at turning-up positions in a running direction are rotatingly-driven.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power transmission device configured to rotationally drive a member that performs a specific action by appropriate rotation by power transmitted from a rotary power source through an annular belt, and a device therefor. The present invention relates to a roller conveyor that is frequently used for conveying various articles.

[0002]

2. Description of the Related Art Conventionally, a power transmission device configured to rotationally drive a member having a specific action by appropriately rotating by power transmitted from a rotary power source through an annular belt has been used, for example, for various households. It is used as a drive system for transportation in electrical products or physical distribution. Particularly, in a roller conveyor for physical distribution and the like, a large number of conveying rollers that are laid between a pair of frames are rotated to convey an article placed thereon, and the driving structure of the conveying rollers is diverse. However, one example is the actual Kaihei 2-112.
No. 609 and No. 3-64906. That is, a large number of drive rings are fixed at predetermined intervals on a longitudinal drive shaft (drive shaft) which is appropriately supported, and between the drive ring and a driven roller (carrier roller) rotatably provided on the frame. It is a belt that is stretched over. The conductive belt has a structure called an O-ring, or an endless structure, and is wound around one driving ring and one driven roller. According to this configuration, when the drive shaft is rotationally driven by the motor or the like, a large number of drive rings are simultaneously rotated in the same direction, the rotational force is transmitted to each driven roller via the transmission belt, and each driven roller is Rotate simultaneously in the same direction. Therefore, the article placed on the driven roller is conveyed in the rotation direction of the driven roller. However, according to the study by the inventor of the present application, it became clear that the device represented by the roller conveyor having the conventional structure has the following problems.

[0003]

In a power transmission device represented by a conventional roller conveyor, a large number of drive rings fixed to a long drive shaft and a driven roller pass through a transmission belt. Therefore, for example, even when exchanging one transmission belt, the drive shaft and all the transmission belts through which the drive shaft is inserted are once removed, the transmission belt to be replaced is inserted, and all the transmission belts are inserted again. The transmission belt must be hung and the drive shaft must be attached. Therefore, the maintenance of the roller conveyor requires a lot of trouble, and an urgent improvement has been desired. An object of the present invention is to provide a power transmission device and a roller conveyor configured so that the annular belt, which is a power transmission means, can be easily replaced.

[0004]

The object of the present invention is to provide a power transmission device configured to rotationally drive a rotary action member by power transmitted from a rotary power source through an annular belt. The members are inserted into the ring of the annular belt at both ends of the annular belt,
The annular belt is provided so as to be rotated by the annular belt, and the annular belt is stretched around the drive shaft of the rotary power source so that the reciprocating traveling paths are substantially aligned, and the rotating shaft is provided on one side of the reciprocating traveling path. Can be achieved by a power transmission device configured to transmit the driving force of (1) and be free to travel on the other side. Further, the object of the present invention is to provide a roller conveyor configured to rotationally drive a transport roller by power transmitted from a rotary power source through an annular belt, wherein the transport roller is provided at each end of the annular belt. The circular belt is inserted into the ring of the annular belt and rotated by the annular belt, and the annular belt is reciprocated by a pulley fixed to the drive shaft of the rotary power source and a guide member provided around the drive shaft. Is achieved by a roller conveyor that is laid so as to be substantially aligned.

[0005]

According to the power transmission device and the roller conveyor, the drive shaft constituting the rotary power source and the drive member (pulley) fixed to the drive shaft do not pass through the annular belt,
One end of the annular belt contacts the outside of the driving member to
The vehicle travels in the forward direction, which is the traveling direction of. Then, the first rotation acting member (first conveyance roller) provided so as to pass through the annular belt at the folding position where it travels in the backward movement direction which is the second traveling direction from the forward movement direction is rotationally driven, Further, a guide member for guiding the returning annular belt so as not to insert the rotational power source is guided to the folding position from the backward movement to the forward movement, and the annular belt is inserted at the folding position. The second rotation acting member (second conveying roller) is rotationally driven. Therefore,
The annular belt is wound around so as to rotationally drive the plurality of rotation acting members (conveying rollers) without being inserted into the rotational power source, and when the annular belt is replaced, the drive shaft of the rotational power source is removed and No need for troublesome work such as re-installation.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of a roller conveyor to which the present invention is applied will be described below in detail with reference to the accompanying drawings. In addition,
FIG. 1 is a perspective view of essential parts showing a basic structure of a roller conveyor, FIGS. 2 and 3 are perspective views for explaining how to hang an annular belt, and FIG. 4 is a side view showing the structure of the roller conveyor.

The roller conveyor 1 of this embodiment comprises a drive shaft 2 configured to be driven to rotate in a desired direction A by a motor (not shown), a drive pulley 3 fixed to the drive shaft 2 and integrally rotated. A rotary pulley 4, which is rotatably supported by the drive shaft 2 but rotates idle, a conveying roller 5 which is rotatably supported by a frame body (not shown), and further contacts the outer peripheral surfaces of the drive pulley 3 and the rotary pulley 4. In addition, it is composed of an annular belt 6 wound around two conveying rollers 5 so as to be inserted inside. The drive shaft 2 and the drive pulley 3 correspond to the rotary power source in the present invention, and the rotary pulley 4
Corresponds to a guide member. As far as the configuration is viewed with reference to FIG. 1, it seems as if the drive shaft 2, the drive pulley 3 and the rotary pulley 4 are inserted through the annular belt 6. However, the annular belt 6 has a drive shaft 2 as described below.
It is designed so that the replacement work can be performed very easily because no such items are inserted.

That is, when the annular belt 6 is hung, the middle of the annular belt 6 is applied to the outer peripheral surfaces of the drive pulley 3 and the rotary pulley 4 as shown in FIG. To put it in contact with it. As a result,
The contact range between the drive pulley 3 and the annular belt 6 is increased, in other words, the frictional resistance is increased, and the annular belt 6 is urged to travel in the rotation direction of the drive pulley 3.
Therefore, when the drive shaft 2 rotates in the arrow A direction, the annular belt 6 travels in the first traveling direction referred to in the present invention, in other words, in the arrow B direction corresponding to the forward movement direction. On the other hand, the annular belt 6 travels back at both ends 7a and 7b, and the traveling direction changes to the second traveling direction C. Since the rotary pulley 4 is not fixed to the drive shaft 2, the rotary pulley 4 rotates corresponding to the traveling direction C of the annular belt 6, and the rotation direction D
Is opposite to the rotation direction A of the drive pulley 3.

When the annular belt 6 shown in FIG. 2 is further brought into contact with the outer peripheral surfaces of the drive pulley 3 and the rotary pulley 4, the result is as shown in FIG. 3. In this state, one end portion 7a of the annular belt 6 is brought into contact. And the traveling direction of the other tip portion 7b is different. Since the roller conveyor 1 rotates a large number of conveying rollers 5 in the same direction and conveys an article placed thereon, it conveys when the traveling directions of the leading end portions 7a and 7b are different as shown in FIG. The rotation direction of the roller 5 is different, and the article cannot be conveyed in a predetermined direction. Therefore, in the present embodiment, as shown in FIG. 1, the annular belt 6 reaching the tip portion 7b.
It is configured to be twisted once and run in the same direction. As a result, the conveying roller 5 having the annular belt 6 wound around and inserted through both the tip portions 7a and 7b can rotate in the same direction E and convey the article.

Next, a specific example of the roller conveyor 1 will be described with reference to FIG. The frame body 11 (conveyor frame) is actually provided with two strips at a predetermined interval, and the transport roller 5 is rotatably provided so as to bridge between the pair of frame bodies 11. Then, bearings 12 are provided on the lower surface of the frame body 11 at appropriate intervals, and the drive shaft 2 is rotatably borne. The drive shaft 2 is assumed to be rotationally biased in the direction of arrow A by a motor (not shown). Two
A drive pulley 3 is fixed to a drive shaft 2 and a rotary pulley 4 is rotatably attached to the lower portion of each of the transport rollers 5 at a substantially intermediate position. The rotary pulley 4 is rotatable with respect to the drive shaft 2, but is not displaced in the longitudinal direction.

The looping of the annular belt 6 is performed by first bringing the drive pulley 3 and the rotary pulley 4 into contact with each other as described with reference to FIG. 2, and then inserting the conveying roller 5 into both ends 7a and 7b. . That is, neither the drive shaft 2, the drive pulley 3, nor the rotary pulley 4 is inserted through the annular belt 6. Although the conveyor belt 5 is inserted through the annular belt 6, it can be easily inserted through the annular belt 6 only by temporarily removing the end portion on which the annular belt 6 is hung, in other words, by lifting it. When the drive shaft 2 is rotated in this assembled state, the rotary pulley 3 also integrally rotates, and the annular belt 6 travels in the same manner as described above. In this case, the transport rollers 5 rotate in the same direction E and Will be transported.

Next, the exchange of the annular belt 6 will be described. As described with reference to FIG. 2, the annular belt 6 is brought into contact along the outer peripheral surfaces of the drive pulley 3 and the rotary pulley 4, and both ends 7a, The conveyance roller 5 is inserted through 7b and is wound around. At this time, since it is not necessary to insert the drive pulley 3 and the rotary pulley 4 into the annular belt 6, it is not necessary to remove the drive shaft 2 from the bearing 12 and attach it again after belting as in the conventional case. Therefore, the replacement work can be easily performed in a short time. It should be noted that when replacing the annular belt 6, it is necessary to remove the two transport rollers 5 and attach them after the belts have been wound around, but this work is simple and should be performed regardless of the transport rollers 5 that do not require replacement. You can

Next, a second embodiment of the present invention will be described with reference to FIG. The difference between this embodiment and the first embodiment is that
Since the structure of the rotating roller 4 is changed, the members having the same functions as those described above are designated by the same reference numerals and the description thereof will be omitted. In this embodiment, instead of the rotary pulley 4, small-diameter rotary pulleys 21a and 21b are provided in non-contact with the drive shaft 2 and the drive pulley 3, and the rotary pulleys 21a and 21b are provided.
Is rotatably attached using the frame 11 or the like. With this configuration, the annular belt 6 can be replaced without inserting the drive shaft 2, the drive pulley 3, and the rotary pulleys 21a and 21b as in the first embodiment.

Next, a third embodiment of the present invention will be described with reference to FIG. The members having the same functions as those of the first embodiment are designated by the same reference numerals and the description thereof will be omitted. In this embodiment, the rotary pulley 4 is replaced by a large number of rotary pulleys having a diameter smaller than that shown in FIG.
Is provided in contact with the drive shaft 2 and the drive pulley 3, and the cross-sectional structure of the guide member 22 is formed into a groove or a gutter shape, and is fixed using the frame body 11 or the like. Even with this configuration, the annular belt 6 can be replaced without inserting the drive shaft 2, the drive pulley 3, and the guide pulley 22 as in the first embodiment.

Next, a fourth embodiment of the present invention will be described with reference to FIGS. 7 and 8. The present embodiment relates to the structure of the roller conveyor, and the difference from the first embodiment is that one annular belt 6 is used to form two conveying paths. That is, in the roller conveyor 31 in this embodiment, the conveyor roller 5a forming the first conveying path and the conveying roller 5b forming the second conveying path are rotationally driven by the single annular belt 6. . Annular belt 6
Are brought into contact with the outer peripheral surfaces of the drive pulley 3 and the rotary pulley 4 as in the case of the first embodiment. When the drive pulley 3 rotates in the direction of arrow A, the annular pulley 6 travels in the direction of arrow B, and simultaneously rotates the carry roller 5a and the carry roller 5b in the direction of arrow. Therefore, in the first transport path, the article can be transported from the back side in FIG. 7 toward the front side, and in the second transport path, the article can be transported from the front side toward the back direction.

Also in this embodiment, the drive pulley 3 and the rotary pulley 4 are not inserted through the annular belt 6, so that the annular belt 6 can be easily attached and replaced. In order to match the rotation directions of the transport rollers 5a and 5b, the transmission belt 6 may be twisted around one of the transport rollers 5a and 5b as described in the first embodiment.

By the way, in the structure shown in FIG. 7, the contact area between the drive pulley 3 and the annular pulley 6 is short, so there is a risk of slippage. Therefore, as shown in FIG. 8, a rotary pulley 23 is provided to increase the contact range between the drive pulley 3 and the annular belt 6. According to this configuration, the rotational force of the drive pulley 3 is satisfactorily transmitted to the annular pulley 6, and the transport roller 5
A and 5b can be efficiently rotationally driven.

Next, a fifth embodiment of the present invention will be described with reference to FIG. The present embodiment relates to the structure of the roller conveyor, and the feature of the first embodiment resides in that the conveying path is formed in multiple stages using one annular roller 6. That is, the roller conveyor 41 in this embodiment is configured to rotate and drive the conveying roller 5a and the conveying roller 5b which are provided in a stacked state with a predetermined interval by the single annular belt 6. The annular belt 6 is brought into contact with the outer peripheral surfaces of the drive pulley 3 and the rotary pulley 4 as in the case of the first embodiment. When the drive pulley 6 rotates in the arrow A direction, the annular belt 6 travels in the arrow B direction, and simultaneously rotates the transport rollers 5a and 5b in the arrow directions. Therefore, in the upper conveyance path constituted by the conveyance rollers 5a, the article is conveyed from the front side to the back direction, and in the lower conveyance path constituted by the conveyance rollers 5b, the article is conveyed from the rear side to the front direction. To be transported to.

Also in this embodiment, the drive pulley 3 and the rotary pulley 4 are not inserted through the annular belt 6, so that the annular belt 6 can be easily attached and replaced. In order to match the rotation directions of the transport rollers 5a and 5b, the transmission belt 6 may be twisted around one of the transport rollers 5a and 5b as described in the first embodiment.

Although the embodiments of the present invention have been described above, the present invention can be applied to other than the roller conveyor. For example, there is a conveying device configured to convey an article by causing a conveying belt to travel, and the conveying device can also be used for rotationally driving a roller for traveling the conveying belt. Further, a groove for winding the annular belt 6 around the transport roller 5 may be formed to prevent the annular belt 6 from being displaced. The present invention is not limited to the roller conveyor as in the above embodiments, but can be applied to various driving force transmitting devices such as a driving force transmitting portion of a belt drive system of a video tape recorder.

[0021]

As described above, in the power transmission device and the roller conveyor according to the present invention, the annular belt is made to run without inserting the rotary drive source such as the drive pulley or the guide member into the annular belt, At both ends of the belt, in other words, at the folding position in the traveling direction, the transport roller wound around the annular belt is driven to rotate. Therefore, when assembling the power transmission device or the roller conveyor, it is not necessary to insert the drive shaft, the rotary pulley or the like constituting the rotary drive source into the annular belt, and the rotary drive source can be removed or inserted again when the annular belt is replaced. Is unnecessary, and maintenance can be performed easily and efficiently.

[Brief description of drawings]

FIG. 1 is a perspective view of a main part of a roller conveyor showing a first embodiment of the present invention.

FIG. 2 is a perspective view of a main part showing how to hang an annular belt.

FIG. 3 is a perspective view of a main part showing a procedure for hanging an annular belt.

FIG. 4 is a side view showing a configuration of a roller conveyor.

FIG. 5 is a perspective view of an essential part showing a second embodiment of the present invention.

FIG. 6 is a perspective view of an essential part showing a third embodiment of the present invention.

FIG. 7 is a perspective view of a main part of a roller conveyor showing a fourth embodiment of the present invention.

FIG. 8 is a side view of a main portion showing how to hang an annular belt.

FIG. 9 is a perspective view of an essential part showing a fifth embodiment of the present invention.

[Explanation of symbols]

 1, 31, 41 Roller conveyor 2 Drive shaft 3 Drive pulley 4, 21a, 21b, 22 Guide member 5, 5a, 5b Conveying rollers 7a, 7b Both ends 11 Frame 12 Bearing

Claims (2)

[Claims] 1. A power transmission device configured to rotationally drive a rotary action member by power transmitted from a rotary power source through an annular belt, wherein the rotary action member is provided at both ends of the annular belt. It is provided so as to be inserted into the ring of the belt and rotated by the annular belt. The annular belt is stretched around the drive shaft of the rotary power source so that the reciprocating traveling paths are substantially aligned with each other, and A power transmission device configured such that the driving force of the rotary shaft is transmitted on one side of a traveling path and the vehicle can travel freely on the other side. 2. A roller conveyor configured to rotationally drive a conveying roller by a power transmitted from a rotational power source through the annular belt, wherein the conveying roller is provided on both end sides of the annular belt. The annular belt is inserted into an annulus and rotated by the annular belt so that the reciprocating traveling paths of the annular belt are substantially aligned by a pulley fixed to the drive shaft of the rotary power source and a guide member provided around the drive shaft. A roller conveyor characterized by being stretched over.