JP2002046830A - Reverse conveyance prevention mechanism for conveyor device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a low-cost reverse conveyance prevention mechanism for a conveyor device, preventing reverse conveyance of a conveyed object without projecting a projecting members or the like over a conveying line. SOLUTION: This reverse conveyance prevention device for the conveyor device (e.g. a roller conveyor 1) conveying the conveyed object by rotation of rollers 2 has one-way clutches 5 below the conveying line 4 for conveying the conveyed object such that the clutches 5 abut on the rollers 2. The one-way clutch 5 can idle to the direction to which the roller 2 conveys the conveyed object, and does not rotate the opposite direction to the direction allowing the idling. The one-way clutch 5 is formed around the other end of an eccentric shaft 7 having one end that is rotatably fixed, while the periphery of the clutch 5 has a friction ring 6 to restrain the roller 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mechanism for preventing a transported object from being transported in a reverse direction.

[0002]

2. Description of the Related Art In a transport device such as a roller conveyor, when a transported product is stopped, the transported product is stopped by hitting a stopper on the transport device. However, the transported product may be stopped depending on the transport speed and the weight of the transported product. When it hits the stopper, it may rebound and return in the opposite direction. In order to prevent such reverse feeding, as shown in FIG. 2 or FIG. 3, the projecting member 10 is made to protrude above the transport line (pass line) 11, and the transported object 12 which has collided with the stopper 15 and is reversely fed is returned. Generally, an anti-back device that stops a dam and is prevented from being sent in the opposite direction is used. As shown in FIG. 2A, the protruding member 10 of the anti-back device includes one protruding by an actuator 13 and one protruding by a spring 14 as shown in FIG. 2B.

[0003]

However, in such an anti-back device, when the article 12 hits the projecting member 10, the article 12 is damaged, or when the projecting member 10 is not operated, In some cases, the member 10 was not completely retracted and slightly protruded above the transport line 11, which sometimes hindered the transport. In addition, the installation position of the projecting member 10 must be changed depending on the size of the conveyed object 12, and a mechanism for operating the actuator 13 and the spring 14 is also required, which is economically problematic.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a reverse feed prevention mechanism of a transfer device which is inexpensive and prevents a transfer object from feeding backward without projecting a member or the like on a transfer line.

[0005]

In order to solve the above-mentioned problems, the invention according to claim 1 is, for example, as shown in FIG. 1, a conveying device (for example, a roller 2) for conveying a conveyed object by rotating a rotating body (for example, a roller 2). For example, a one-way clutch (5) which is a back-feed prevention mechanism of a roller conveyor 1) so that the one-way clutch (5) is brought into contact with the rotating body below a transport line (4) through which the transported material is transported.
The one-way clutch is characterized in that the one-way clutch is capable of idling in a direction in which the rotating body conveys a conveyed object, and does not rotate in a direction opposite to the idling possible direction.

According to the first aspect of the present invention, the one-way clutch, which is rotatable in the direction in which the rotating body conveys the conveyed object and does not rotate in the direction opposite to the free rotating direction, abuts on the rotating body, If the rotating body is rotating in the direction of transporting the goods, the one-way clutch rotates together so as not to hinder the rotation of the rotating body, but if the rotating body rotates in the opposite direction, the one-way clutch is rotated in one direction. Since the clutch does not rotate, reverse rotation of the rotating body in contact is prevented. As a result, it is possible to prevent the transported object on the transport device from being fed back. In addition, since the one-way clutch does not require a driving unit or the like, it can be configured at a low cost. Further, since the one-way clutch is provided below the transfer line on which the transfer object is transferred, the one-way clutch does not contact the transfer object. Therefore, there is no hindrance to the transport of the transported object, and the transported object is not damaged.

According to a second aspect of the present invention, there is provided a back-feed preventing mechanism for the transport device according to the first aspect, wherein, for example, as shown in FIG. 1, the one-way clutch includes a friction ring (6) on an outer periphery. It is characterized by having.

According to the second aspect of the present invention, since the friction ring is provided on the outer periphery of the one-way clutch,
Since the one-way clutch contacts the rotating body via the friction ring, the rotating body can be further restrained by the frictional force.

The invention described in claim 3 is the first or second invention.
The one-way clutch is provided at the other end of an eccentric shaft (7), one end of which is rotatably fixed, as shown in FIG. 1, for example, as shown in FIG. It is characterized by being formed centered.

According to the third aspect of the present invention, the one-way clutch is provided at the other end of the eccentric shaft whose one end is rotatably fixed, so that the one-way clutch and the rotating body are rotated by rotating the eccentric shaft. And the distance can be adjusted. Therefore, it is possible to easily adjust the restraining force of the rotating body by the one-way clutch, and to replace the friction ring when the friction ring provided on the outer periphery of the one-way clutch becomes hard to contact with the rotating body. It can be brought into contact with the rotating body again without the need.

[0011]

Embodiments of the present invention will be described below in detail with reference to the drawings. First, the configuration of the reverse feed prevention mechanism of the transport device will be described. As shown in FIG. 1, a roller conveyor (conveying device) 1 is schematically constituted by a plurality of rollers 2 and stoppers 3.

The plurality of rollers 2 are arranged in parallel at right angles to the direction in which the article is conveyed, and the upper end of each roller 2 is located on the same plane. This plane is the transport line 4, and a transported object (not shown) is transported on the transport line 4.

A one-way clutch 5 having a friction ring 6 on the outer periphery thereof comes into contact with the roller 2 below the roller 2 on the side opposite to the direction in which the article is conveyed (the direction of arrow A in FIG. 1). Is provided. The one-way clutch 5 can idle only in the direction in which the roller 2 conveys the conveyed object. That is, the rotation direction of the roller 2 that conveys the conveyed object (FIG. 1)
The structure is such that it rotates only in the direction opposite to the direction of the arrow B (in the direction of arrow C in FIG. 1) (the direction of the arrow C in FIG. 1) and does not rotate in the direction opposite to the direction in which it rotates. The one-way clutch 5 has an eccentric shaft 7 having one end rotatably fixed.
Is formed around the eccentric shaft 7 at the other end.

The stopper 3 has a plate shape and protrudes above the transport line 4 so as to block the transport line 4 of the roller conveyor 1, and the transported object hits the stopper 3 to stop.

Next, a description will be given of an operation for preventing a reverse feed of the reverse feed preventing mechanism of the transport device according to the present embodiment. First, a conveyed article is placed on the roller 2 of the roller conveyor 1 configured as described above, and the conveyed article is slid in the direction in which the article is to be conveyed (the direction of arrow A). At this time, the roller 2 rotates in the direction in which the conveyed object is conveyed (the direction of the arrow B) and causes the one-way clutch 5 in contact with the roller 2 to idle.

The transported material is transported along the transport line 4 and collides with the stopper 3 on the transport line 4. Due to the reaction of this rear-end collision, the conveyed article tries to return in the direction opposite to the direction in which it should be conveyed, and rotates the roller 2 in contact with it in the reverse direction. At this time, the roller 2 comes into contact with the one-way clutch 5 and the one-way clutch 5
Is restrained by a friction ring 6 provided on the outer periphery of the clutch, so that the one-way clutch 5 tries to rotate in the reverse direction, but the one-way clutch 5 has a structure that does not rotate in the reverse direction. Instead, the roller 2 is stopped by preventing reverse rotation of the roller 2. When the roller 2 stops, the conveyed article cannot advance and stops without being fed backward.

Incidentally, the restraining force of the roller 2 of the one-way clutch 5 is adjusted by rotating the eccentric shaft 7. When the eccentric shaft 7 is rotated toward the roller 2, the one-way clutch 5
When the eccentric shaft 7 is rotated in a direction opposite to the roller 2, the one-way clutch 5 moves in a direction away from the roller 2 to restrain the roller 2 weakly. Become. Further, when the friction ring 6 of the one-way clutch 5 becomes worn and becomes difficult to contact, the eccentric shaft 7 is rotated toward the roller 2 each time and the roller is brought into contact with the roller 2 again.

As described above, according to the reverse feed prevention mechanism of the transport apparatus of the above-described embodiment, the one-way clutch 5 which can idle in one direction and does not rotate at all in the reverse direction, and the roller 2 transports the transported object. The one-way clutch 5 rotates the roller 2 when the roller 2 rotates in the direction in which the conveyed object is conveyed by contact with the roller 2 so that the roller 2 can rotate in a direction opposite to the direction in which the roller 2 rotates. If the roller 2 tries to rotate in the reverse direction without hindering the rotation, the reverse rotation of the contacting roller 2 is stopped. Further, since the friction ring 6 is provided on the outer periphery of the one-way clutch 5, the roller 2 is reliably restrained by the frictional force. Therefore, roller 2
Does not reversely rotate, so that the conveyed material on the roller 2 does not reversely rotate. In addition, since the one-way clutch 5 does not require a driving means or the like, the one-way clutch 5 can be configured easily at low cost and is economical.

Further, since the one-way clutch 5 is provided below the transport line 4 on which the transported object is transported, the one-way clutch 5 does not hinder the transport of the transported object and does not contact the transported object. There is no damage to things. Further, by providing the one-way clutch 5 at the other end of the eccentric shaft 7 having one end rotatably fixed, the eccentric shaft 7 is rotated to change the position of the one-way clutch 5 so that one-way clutch 5 can be easily rotated. It is possible to adjust the restraining force of the roller 2 by the clutch 5, and to contact the roller 2 again without replacing the friction ring 6 even if the friction ring 6 is worn out.
It is economical.

In the above-described embodiment, a roller conveyor is used as a transporting device. However, the present invention is not limited to this, and any device that transports a transported object by rotating a rotating body can be used. For example, a belt conveyor composed of a rotating body and a belt may be used. In addition, the shape of the stopper and the like are arbitrary, and the specific detailed structure and the like can be appropriately changed.

[0021]

According to the first aspect of the present invention, the one-way clutch is brought into contact with the rotating body, and the one-way clutch is capable of idling in the direction in which the rotating body conveys a conveyed object, and in the opposite direction to the idling possible direction. By not rotating in the direction, when the rotating body rotates in the direction of transporting the conveyed article, the one-way clutch rotates in contact with the rotating body, so that rotation of the rotating body is not hindered. When the rotating body rotates in the reverse direction, the one-way clutch cannot rotate in the reverse direction, so that the rotation of the rotating body in contact is stopped. Therefore, the use of the one-way clutch eliminates the need for a driving means, so that the reverse rotation of the rotating body can be stopped at low cost, and the reverse feeding of the conveyed object on the conveying device can be prevented. In addition, since the one-way clutch is provided below the transfer line on which the conveyed object is conveyed, the one-way clutch does not contact the conveyed object, so that the one-way clutch does not hinder conveyance of the conveyed object, and the conveyed object is not damaged. It does not stick.

According to the second aspect of the present invention, since the friction ring is provided on the outer periphery of the one-way clutch,
The one-way clutch can further restrain the rotating body in contact with the frictional force generated by the friction ring, and can more reliably prevent the reverse rotation of the rotating body.

According to the third aspect of the present invention, the one-way clutch is provided at the other end of the eccentric shaft whose one end is rotatably fixed, so that the one-way clutch and the rotating body are rotated by rotating the eccentric shaft. Can be adjusted, and the restraining force of the rotating body by the one-way clutch can be easily adjusted. Further, when the friction ring provided on the one-way clutch is worn and becomes difficult to contact the rotating body, it is possible to contact the rotating body again without replacing the friction ring.

[Brief description of the drawings]

FIG. 1 is a schematic side view showing a structure of a reverse feed prevention mechanism of a transport device as an example to which the present invention is applied.

FIGS. 2A and 2B are schematic side views showing the structure of an anti-back device of a conventional transport device, wherein FIG. 2A is an anti-back device for projecting a projecting member using an actuator, and FIG. The anti-back device to be projected is shown.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Roller conveyor (conveying device) 2 Roller (rotating body) 4 Conveying line 5 One-way clutch 6 Friction ring 7 Eccentric shaft

Claims (3)

[Claims] 1. A back-feed prevention mechanism for a transport device that transports a conveyed object by rotating a rotating body, wherein the one-way clutch is configured to contact the rotating body below a conveying line on which the conveyed object is conveyed. The one-way clutch, wherein the one-way clutch is rotatable in a direction in which the rotating body conveys the conveyed object, and does not rotate in a direction opposite to the direction in which the rotatable member is rotatable. 2. The mechanism according to claim 1, wherein said one-way clutch has a friction ring on an outer periphery thereof. 3. The one-way clutch according to claim 1, wherein the one-way clutch is provided at the other end of an eccentric shaft whose one end is rotatably fixed, and is formed around the eccentric shaft. Reverse feed prevention mechanism of the transport device.