JPH06255859A - Stock conveyer device - Google Patents

Abstract

PURPOSE:To drop down a carried-in workpiece to a specific position and further to shorten a time for action of the dropping by a simple constitution. CONSTITUTION:Two endless chains 6 forward/reverse turned to be driven in a specific track are provided, and a delivery base 8 is provided partly in a section in the lengthwise direction of these chains 6. The delivery base 8 is constituted in a reed screen shape by connecting a plurality of conveyer rollers 7 between both the chains 6, and each conveyer roller 7 is mounted through a one-way clutch 12 relating to the chain 6. A gripper 3 for clamping the end part of a plate-shaped workpiece W is provided in a conveyer front end, and the plate-shaped workpiece W is loaded in the delivery base 8 and fed to the front by driving the chain 6 turned. By clamping this plate-shaped workpiece W by the gripper 3 turned in a reverse direction of the chain 6, the plate-shaped workpiece W, taking refuge from the delivery base 8, is dropped down. Each conveyer roller 7, while preventing a slip of the plate-shaped workpiece W at its forward feed by action of the one-way clutch 12, prevents the plate-shaped workpiece W from its rubbing flaw due to frictional resistance at the time of reversing.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stock conveyor device for loading a plate-like work and loading and collecting it on a product box or the like which is made to stand by below.

[0002]

2. Description of the Related Art A stock conveyor device 30 having a construction as shown in FIG. 6 is conventionally used for loading and collecting plate-like works conveyed by a conveyor in a product box. In this stock conveyor device 30, a pair of left and right endless chains 33 are mounted on front and rear sprockets 32 of a frame 31, and a delivery table 36 is provided in a part of the length of these endless chains 33. The delivery table 36 is composed of a plurality of rotatable conveyor rollers 34 in the shape of an avalanche. The endless chain 33 is the chain drive motor 3
It is rotationally driven in the forward and reverse directions by 7. A drive belt 38 for rotating and driving the conveyor roller 34 that has come to the lower path of the endless chain 43 is arranged below the delivery table 36,
It is rotationally driven by the motor 39. In the upper path portion of the drive belt 38, the drive belt 38 is attached to the conveyor roller 34.
A tension roller 40 is provided for pressing against, and the pressing state and the separated state are switched by vertical movement by the cylinder 41. At the front part of the frame 31, a gripper 42 for gripping the front end of the plate-shaped work W sent by the delivery table 36.
Is provided.

As shown in FIG. 6 (A), when the work is carried in, the delivery table 36 is located in the lower path of the endless chain 33, and each conveyor roller 34 is rotationally driven by the drive belt 38. As a result, the plate-shaped work W sent from the drive conveyor 43 in the previous stage is placed on the delivery table 36 and sent forward. The plate-shaped work W that has reached the front end is gripped by the gripper 42.

Then, the endless chain 33 is rotated to retract the delivery table 36 to the upper path, after which the gripping of the plate-shaped work W by the gripper 42 is released. As a result, the plate-shaped works W are dropped and collected in the product box 44 standing by downward as shown in FIG. 6B.

[0005]

However, such a conventional stock conveyor device 30 requires a drive belt 38, a belt drive motor 39, a belt up / down cylinder 41, etc. in addition to the chain drive motor 37 of the delivery table 36. However, the configuration is complicated and the cost is significantly increased. Moreover, there is a problem that the operation time becomes long because the drive belt 38 needs to be moved up and down.

An object of the present invention is to provide a stock conveyor device capable of dropping a carried-in work to a predetermined position with a simple structure and shortening an operation time.

[0007]

The present invention is provided with two endless chains which are rotationally driven in a forward and reverse directions on a predetermined track.
In a stock conveyor device in which a delivery table is provided in a part of the lengthwise direction of these chains, each conveyor roller constituting the delivery table is attached to the chain via a one-way clutch. The delivery table is formed by interlocking a plurality of conveyor rollers between both chains and forming a comb shape.

[0008]

The plate-shaped work is placed on the delivery table and sent forward as the delivery table is extended to the upper path of the chain by the rotational drive of the chain. At this time, the conveyor rollers forming the delivery table are prevented from rotating in the direction in which the plate-like work is retracted by the action of the one-way clutch, and the plate-like work can be reliably fed. When the plate-shaped work reaches a predetermined position, the front end of the work is gripped by an appropriate means, the chain is rotated in the opposite direction, and the delivery table is retracted from the upper path. As a result, the plate-like work drops downward. At this time, the rotation direction generated by the contact of each conveyor roller with the plate-shaped work is opposite to the rotation blocking direction by the one-way clutch, and the lower surface of the plate-shaped work freely rolls and moves back. Therefore, sliding friction resistance does not occur, and abrasion on the lower surface of the plate-like work is prevented.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIGS. Stock conveyor apparatus 1 of this embodiment
Is a conveyor main body 2 which is arranged in the preceding stage, for example, on which a plate-shaped work W conveyed from the drive conveyor 20 is placed and which is sent forward, and a gripper 3 which holds the front end of the sent plate-shaped work W. Have.

In the conveyor body 2, a pair of left and right endless chains 6 and 6 are mounted on a plurality of sprockets 5 arranged in front of and behind the conveyor frame 4, and a delivery table is provided in a part of the length of the endless chains 6. 8 is configured.
The delivery table 8 is formed in a comb shape in which a plurality of conveyor rollers 7 are connected between the endless chains 6. An accommodation box 9 for accommodating the intermediary transfer table 8 is provided at the rear of the conveyor frame 4, and a drive motor 10 for rotating the endless chain 6 forward and backward is provided at the front of the conveyor frame 4. There is. At an intermediate portion of the conveyor frame 4, a guide rail 11 slidably supporting a conveyor roller 7 that is fed to an upper path of the endless chain 6.
Is provided.

The gripper 3 is swingably supported above the front portion of the conveyor frame 4 via a mounting frame 4a.
A driving device (not shown) such as a cylinder device can swing between the drooping posture and the forward leaning posture. Instead of the drive device, a spring member or the like may be provided to urge it toward the drooping posture. Further, the gripper device 3 has an opening / closing drive source (not shown) that opens and closes the upper and lower jaws.

Each conveyor roller 7 is connected to the endless chain 6 via a one-way clutch 12 as shown in FIG. On the other hand, the clutch 12 is a slug clutch in which a plurality of slug cams 16 connected by a coil spring 15 are arranged between an outer ring 13 and an inner ring 14 as shown in FIG. 4, for example. Due to the action of the cam 16, the outer ring 13 can freely rotate in the direction of arrow A and is prevented from rotating in the direction of arrow B. The inner ring 14 is a pin 17 of the endless chain 6.
(Fig. 3), the outer ring 13 is fixed to the conveyor roller 7.

As shown in FIG. 1, a drive conveyor 2 is provided between the stock conveyor device 1 and the drive conveyor 20 in the preceding stage.
A detector 18 for detecting the plate-shaped work W sent from 0 to the stock conveyor device 1 is provided, and the start of the chain drive motor 10 is controlled by using the detection signal as a timing signal.

The operation of the above configuration will be described. The stock conveyor device 1 waits in a state where the interdigital transfer table 8 is housed in the housing box 9 of the frame 4. The plate-like work W sent below the middle part of the conveyor frame 4.
A product box 21 for loading and collecting the products is arranged.

In this state, when the plate-like work W is sent from the drive conveyor 20 in the preceding stage to the stock conveyor device 1, the detector 18 detects the plate-like work W, and the drive motor 10 is detected by the detection signal. Forward drive is started. As a result, the endless chain 5 is rotationally driven, and the delivery table 8 is extended from the inside of the accommodation box 9 to the upper path while being supported by the guide rail 11 as shown in FIG. Therefore, the plate-shaped work W is placed on the conveyor roller 7 and is sent forward as the gripper 3 waits, as shown in FIG. At this time,
Each conveyor roller 7 is rotatable by the action of the one-way clutch 12 in the forward direction of the plate-like work W and is in the rotation blocking state in the backward direction. Therefore, the plate-shaped work W is reliably sent forward without moving, as the delivery table 8 moves.

When the plate-shaped work W reaches the forward end, the front end is gripped by the gripper 3 and then the drive motor 10 is switched to the reverse drive. As a result, the delivery table 8 is retracted into the storage box 9 of the conveyor frame 4. At this time, the rotation direction caused by the contact of each conveyor roller 7 with the plate-shaped work W is opposite to the rotation blocking direction by the one-way clutch 12, and the lower surface of the plate-shaped work W is freely rolled and retracted. Therefore, no frictional resistance is generated, and scratches on the lower surface of the plate-shaped work W are prevented. When the rear end of the delivery table 8 comes off the plate-shaped work W, the gripper 3 is opened to release the grip of the plate-shaped work W as shown in FIG. 5B, whereby the plate-shaped work W falls and
It is loaded and collected in the product box 21 below. The gripper 3 tilts freely at the time of this drop, so that the plate-shaped work W is easily separated from the gripper 3.

In this stock conveyor apparatus 1, each conveyor roller 7 of the delivery table 8 is thus connected to the one-way clutch 1
Since it is connected to the chain 6 via 2, the chain drive motor 10 is the only drive means for conveyance, and the conventional drive mechanism shown in FIG.
The drive belt 38, the belt drive motor 39, the belt up-and-down cylinder 41, etc. in FIG. Although the one-way clutch 12 is required, various inexpensive clutches that can be used in place of bearings are commercially available. Therefore, the plate-like work W can be carried in and dropped to a predetermined position with a simple configuration. Further, since the raising / lowering operation of the drive belt 38 in the conventional example shown in FIG. 6 is unnecessary, the time required for the raising / lowering is not necessary and the operation time is shortened.

[0018]

The stock conveyor device of the present invention is provided with two endless chains which are rotationally driven forward and backward on a predetermined track, and between the chains in a part of the lengthwise direction of these chains. Since a comb-shaped transfer table connecting a plurality of conveyor rollers to each other is provided and each of the conveyor rollers is attached to the chain via a one-way clutch, it is possible to drop the incoming work at a predetermined position with a simple structure. Moreover, the operation time can be shortened.

[Brief description of drawings]

FIG. 1 is a front sectional view showing an embodiment of the present invention.

FIG. 2 is a plan view thereof.

FIG. 3 is a cutaway front view showing a part of the embodiment.

FIG. 4 is a sectional view of a main part of a one-way clutch in the embodiment.

FIG. 5 is an explanatory diagram showing the operation of the embodiment.

FIG. 6 is an explanatory diagram showing an operation of a conventional example.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Stock conveyor device, 2 ... Conveyor main body, 3 ... Gripper, 5 ... Sprocket, 6 ... Endless chain, 7 ... Conveyor roller, 8 ... Delivery stand, 10 ... Drive motor, 12
... One-way clutch, 18 ... Detector, W ... Plate-shaped work

Claims (1)

[Claims] 1. An endless chain that is driven to rotate forward and backward on a predetermined track is provided, and a plurality of conveyor rollers are connected between the two chains in a part of the lengthwise direction of these chains. A stock conveyor device in which a blind-shaped delivery table is provided, and each conveyor roller is attached to the chain via a one-way clutch.