JPH0329694B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a drive roller conveyor that accumulates conveyed articles moving on drive rollers without colliding with each other and without damaging the conveyed articles.

(Prior Art) In a conventional roll conveyor, when a detection roller detects a conveyed object, it stops the drive roller of the stage of the conveyed object adjacent to the conveyed object in the reverse conveyance direction. The detection roller does not stop and reach the preceding stage where the detection roller is located, but is pushed by the following conveyed objects and reaches the position where it is detected by the detection roller, which disrupts the alignment of the series of conveyed objects, while the following drive roller However, even though the conveyed object has stopped, it does not completely stop, causing sliding friction between the conveyed object and the conveyed object, which may cause damage to the conveyed object.

(Problems to be Solved by the Invention) In the present invention, when an object being transported by a roller conveyor stops, the drive rollers involved in the following conveyed objects are sequentially stopped, so that each transported object can be mutually In addition to preventing interference and disordered alignment,
To provide a drive roller conveyor capable of eliminating sliding friction between a stopped conveyed object and a drive roller.

(Means for Solving the Problems) The present invention includes drive rollers arranged on a conveyance track, a motor-driven drive shaft that rotates orthogonally to the drive rollers, and a reflex mechanism that fits into the drive shaft. A separate pulley for each of the drive rollers that rotates together, a drive belt that is hung between the pulley and each of the drive rollers and rotates the drive roller in accordance with the rotation of the pulley, and a length of the conveyed object on the frame of the conveyance track. a detection arm rotatably mounted around an axis at a conveyance pitch position determined by and positioned in contact with a stopper by the biasing force of a spring;
and a detection roller that protrudes onto the conveyance surface formed by the drive roller and interferes with the conveyed object on the conveyance surface in a positioning state in which the detection arm is in contact with the stopper, and a fulcrum on the detection arm. A rocker arm is rotatably attached to the rocker arm through the rocker arm, and the rocker arm rotates against the biasing force of the spring when the conveyed object that moves on the conveyance surface at a specific angular position interferes with the detection roller. a locker arm that interferes with a locking portion formed on the pulley to stop the rotation of the pulley when the pulley is rotated; and a locker arm that is attached to the detection arm that is shifted by one pitch in the opposite conveyance direction from each detection arm arranged at the conveyance pitch. When the detection arm is in a position where it is in contact with the stopper due to the biasing force of the spring, the rocker arm in the one-pitch reverse conveying direction is placed in a position where it does not interfere with the locking part of the pulley, and the detection arm is connected to the spring. The drive roller conveyor is provided with a rod for displacing a rocker arm in the reverse conveyance direction by one pitch to a position where it interferes with a locking portion of a pulley when rotated against the urging force of the drive roller conveyor.

(Function) In the drive roller conveyor configured in this manner, when there is no conveyed object on the conveyance track, each drive roller is actively rotated by the drive shaft, and each detection roller is provided to protrude above the conveyance surface.

When a conveyed object is loaded on the conveyor track in this state, it is conveyed by the active rotation of the drive roller, and during this conveyance, the conveyed object interferes with the detection roller and rotates the detection arm, causing the rocker arm to engage the pulley. Even if the locker arm is moved to a position where it can interfere with the stopper, the detection arm, which is shifted by one pitch in the transport direction, is in contact with the stopper, so the locker arm does not interfere with the stopper of the pulley. The conveyed object is conveyed as is unless there is a preceding conveyed object one pitch ahead in the conveying direction.

During this conveyance, in a stop operation state in which the operator manually or automatically presses the detection roller at a specific position, the conveyed object presses the detection roller at one pitch in the opposite conveyance direction of the stop operation detection roller and rotates the detection arm. When the rocker arm at the relevant position interferes with the locking portion of the pulley, the pulley at the relevant position stops while slipping between it and the drive shaft, and the movement of the conveyed object together with the drive roller at the relevant position also stops.

The subsequently conveyed object also rotates the detection arm when the conveyed object is at the 1-pitch position in the conveyance direction, so that the conveyed object reaches the 1-pitch position in the reverse conveyance direction and the detection roller is pushed. The rocker arm interferes with the locking part of the pulley, and the objects to be transported on the transport track are sequentially accumulated with the drive rollers stopped.

In this accumulation state, when the stop operation detection arm is returned to the stopper position,
The interference between the rocker arm at the one-pitch position in the opposite transport direction and the locking part of the pulley is released, and the conveyed object at that position starts moving, and the conveyed object advances one pitch and returns the detection arm, allowing the following The accumulation rate for the conveyed objects is canceled and conveyance starts in sequence.

(Example) Next, the configuration of an example of the present invention will be described with reference to the drawings. In FIG. 1, a drive roller 1 is rotatably supported by bearings (not shown) and a frame structure at approximately equal intervals on a conveyor track, and is generally connected to a pulley 3 attached to a drive shaft 2 installed below the drive roller 1. A drive belt 4 twisted at an angle of 90° is hung in a belt groove 5 formed at the end to form a conveying surface.

The length of the drive roller 1 in the conveyor direction determined from the size of the conveyed object 6, that is, the number related to one conveyance pitch, corresponds to the pulleys 3 provided in one conveyance pitch. Pulley 3 is drive roller 1
Correspondingly, the collar 7 and the wheel 8 which is locked with the locking part 9 form an integral structure, and are fitted to the drive shaft 2 while maintaining a predetermined frictional force. The drive shaft 2 is shared by each conveyance pitch and is continuously driven by a motor (not shown). Detection arm 13
is rotatably mounted on a frame structure by a fulcrum 12, is urged upward by a spring 14, and a protrusion abuts against a stopper 15, so that the detection roller 11 is rotated from the drive roller 1 of the detection roller 11 provided on another protrusion. The protrusion height h (see Fig. 4) is maintained.
As described above, the detection roller 11 is attached to one protrusion of the detection arm 13 so as to be freely rotatable. The detection arm 13 has a rocker arm 10 at the end in the transport direction.
is rotatably mounted on a fulcrum 16, and its tip is configured to interfere with a locking portion 9 provided on a part of the wheel 8 of the pulley 3. Furthermore, the tip is provided with a sensor for detecting a deviation of one pitch in the transport direction. A connecting rod 17'' is rotatably articulated at a fulcrum 18 from the lever of the arm 13. A lever 20 extending downward is provided at the end of the detection arm 13 in the reverse transport direction. A connecting rod 17 that connects a rocker arm 10' provided on a detection arm 13' shifted by one pitch in the reverse conveyance direction is rotatably attached to the tip of the rod 20 at a fulcrum 16'.

As described above, the drive roller conveyor according to the present invention is constructed in units of one conveyance pitch and is repeatedly articulated to form a series of conveyors.

Next, the operation of this embodiment will be explained. Fourth
The figure shows a state where there is no conveyed object on the conveyance track, and the detection rollers 11, 11' of each conveyance pitch are
The detection arms 13, 13' are connected to the springs 14, 1
The locker arm 10, which is biased by 4' and in contact with the stoppers 15, 15', protrudes from the drive roller 1 by an amount h and is connected to the detection arm 13, interferes with the locking part 9 of the wheel 8. Instead, the drive rollers 1, 1' are rotated by pulleys 3, 3' which are rotated by the drive shaft 2 via the drive belts 4, 4'. FIG. 5 shows a state in which the conveyed object 6 is loaded on the conveyance track and moves, pushing down the detection roller 11'.
Although the detection arm 13' has pushed the rocker arm 10' down to a position where it can interfere with the locking part 9 of the wheel 8, the detection arm 13, which is shifted by one pitch in the conveyance direction, comes into contact with the stopper 15 because the conveyed object has not yet arrived. The pulley 3', not shown, which is integrated with the wheel 8', is in a position where it does not interfere with the locking part 9' of the wheel 8' by pulling the rocker arm 10' through the connecting rod 17. It is driven by and conveys the conveyed object 6. Figure 6 shows a state in which the conveyed objects 6, 6' are accumulated due to the operator manually or automatically pushing down the detection roller 11 during the conveyance, and the detection roller is pushed down and the connecting rod 17'' is Since the rocker arm 10 is moved in the reverse transport direction to a position where it can interfere with the locking part 9 of the wheel 8, the transported object 6 is moved to the position where it can interfere with the locking part 9 of the wheel 8.
3 is pushed down, the rocker arm 10 interferes with the locking part 9 of the wheel 8, restraining the rotation of the wheel 8, and the pulley 3 attached to the wheel 8 and the drive roller 1 are also stopped to stop the conveyed object 6. ing. The conveyed object 6' which has reached one pitch in the reverse conveyance direction is also stopped by the same action as the conveyed object 6.
FIG. 7 shows a state in which the objects 6, 6' accumulated on the transport track have been released from the stopping condition either manually or automatically by the operator. That is, since the detection arm, which has shifted by one pitch in the transport direction, is returned and lifted by the spring, the connecting rod 17'' is pulled in the transport direction, and the locker arm 10 is moved to the locking portion 9 of the wheel 8.
Since the wheel 8 is displaced from the interference position, the rotational restraint of the wheel 8 is released. Therefore, the drive roller 1 rotates and sends out the conveyed object 6. The conveyed object 6 is the detection roller 1
1, the detection arm 13 moves to the stopper 15.
The lever 20 returns to the position where it comes into contact with
The locker arm 10' of the pitch is disengaged from the locking portion 9' of the wheel 8', the rotation restraint of the wheel 8' is released, and the conveyed object 6' is moved.

As described above, when the flow of a series of conveyed objects is stopped at a certain conveyed object, the conveyed objects in the opposite conveying direction are accumulated one after another without interfering with each other, and when the stop is canceled, the conveyed objects are also accumulated one after another without interfering with each other. They begin to move without interfering with each other.

(Effects of the Invention) According to the present invention, the conveyance object detection mechanism provided at each conveyance pitch of the roller conveyor divided by conveyance pitches detects whether or not the conveyance object at the adjacent conveyance pitch has stopped in the reverse conveyance direction. Depending on the situation, the conveyance mechanism of the own conveyance pitch is restrained or released to start and stop the drive rollers, and the result is transmitted to the adjacent conveyance pitch in the opposite conveyance direction, and by repeating the above operation, the conveyor of the conveyed object is The flow can be carried out smoothly and in alignment, and there is also an effect of eliminating sliding friction between the drive roller and the conveyed object.

[Brief explanation of drawings]

FIG. 1 shows one unit of conveyance pitch according to an embodiment of the present invention and another unit of conveyance pitch adjacent in the opposite conveyance direction. 2 is a partial view from A showing the state in which the wheel 8 in FIG. 10' is a partial view from view A' showing a rotatable state without being restrained by the roller conveyor.
11', detection arm 13, 13', rocker arm 1
0, 10', wheels 8, 8', and connecting rod 17. FIG. roller 1
1', an explanatory view showing the state in which the action is exerted on the detection arm 13' and the rocker arm 10'.
7 is an explanatory diagram showing a state in which the wheels 8, 8' are restrained by the wheels 8, 8', and FIG. 7 shows that the conveyed object 6, which had been stopped, has started to move after the cause of the stop has been removed, and the conveyance at the adjacent conveyance pitch in the reverse conveyance direction is shown. It is an explanatory view showing a state when the temporary stop of object 6' is released. 1... Drive roller, 2... Drive shaft, 3... Pulley, 4... Drive belt, 6...
...Conveyed object, 8...Wheel, 9...Locking part, 10
...Lotsuka arm, 11...Detection roller, 13...
...Detection arm, 14...Spring, 15...Stopper, 17...Connecting rod.

Claims (1)

[Claims] 1 Drive rollers arranged on a conveyance track,
a motor-driven drive shaft that rotates orthogonally to the drive roller; a separate pulley for each of the drive rollers that is fitted onto the drive shaft and rotates with the drive roller; and a pulley that is suspended between the pulley and each of the drive rollers. a drive belt that rotates the drive roller according to the rotation of the pulley;
a detection arm that is rotatably mounted around an axis at a transport pitch position determined by the length of the transport object on the frame of the transport track, and is positioned in contact with a stopper by the biasing force of a spring; The detection arm is rotatably attached to the detection arm, and when the detection arm is positioned in contact with the stopper, it projects onto the conveyance surface formed by the drive roller and interferes with the conveyed object on the conveyance surface. A detection roller and a rocker arm rotatably attached to the detection arm via a fulcrum, the rocker arm is configured to prevent the detection arm from moving when a conveyed object that moves on a conveyance surface at a specific angular position interferes with the detection roller. a rocker arm that interferes with a locking portion formed on the pulley to stop the rotation of the pulley when the pulley rotates against the biasing force of the spring; A rod that connects a locker arm attached to a detection arm that is misaligned, and locks the locker arm in the reverse transport direction by one pitch to a pulley when the detection arm is in a position where it contacts the stopper due to the biasing force of the spring. and a rod that displaces the locking arm in the reverse transport direction by one pitch to a position where it interferes with the locking part of the pulley when the detection arm rotates against the biasing force of the spring. Features: Drive roller conveyor.