JP2618120B2 - Conveyor device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a detecting device for detecting a work conveyed on a conveyor, holding the work on the conveyer by a predetermined quantity, and detecting a work conveyed by a downstream conveyer. The present invention relates to a conveyor device having a stopper mechanism for feeding a held work to a next-stage conveyor when the number has not reached the number.

[0002]

2. Description of the Related Art Conventionally, conveyors have been widely used for continuously transporting a relatively heavy work to a predetermined place. Then, after taking out the work from the predetermined position of the conveyor by the unloading device or the like, in order to prevent the next work from being supplied at the same time, a stopper mechanism is provided at the unloading portion of the conveyor, and the next work is pressed. A technical idea related to a conveyor device which is to be temporarily held on a conveyor is known (Japanese Patent Application Laid-Open No. 63-2352).
No. 02).

In this prior art conveyor apparatus, a cylinder is disposed above a predetermined position of a conveyor, a stopper is connected to a rod of the cylinder which is displaced vertically and a pressing plate is attached to the tip of the stopper. And a coil spring contracted and arranged.

[0004] In a conveyor device having such a configuration, when a work is taken out from a predetermined position of the conveyor by a carry-out device, a cylinder interlocked with the carry-out device operates to lower a rod, and the next work is moved to a predetermined position on the conveyor. Once on the conveyor at the position.

[0005]

However, in the conveyor device according to the prior art, the work conveyed on the conveyor, particularly, a work having a relatively heavy weight or a work having a complicated contact shape surface, is not used. A large number of works following the work once pressed and held once collide with each other by the constantly moving conveyor, the next work rides on the previous work, and as a result, the predetermined posture of the work being transported is Crumble. As a result, there is a problem that the carrying-out work is hindered in the next carrying-out step. In addition, there is a problem that the work pressing the previous work is strongly pressed by the subsequent work and the stopper mechanism is damaged.

SUMMARY OF THE INVENTION The present invention has been made to solve this kind of problem. A detecting means for detecting the presence of a work at a predetermined position on a conveyor, and a locking claw is operated in response to a signal from the detecting means. By installing a stopper mechanism that
A conveyor device capable of stocking a predetermined number of works on a conveyor to prevent interference between the works and to prevent the conveyor from being overweight, and to avoid an excessive load on a stopper mechanism. The purpose is to provide.

[0007]

In order to achieve the above-mentioned object, the present invention is directed to a plurality of conveyors provided to convey a workpiece, and a plurality of conveyors arranged at substantially equal intervals along a conveyance path of each of the conveyors. a plurality of stations which are divided into the provided plurality of each stations s, a first detecting means for detecting the presence or absence of word over click, provided to each of said plurality of stations, to next station A second detection unit configured to detect whether a predetermined number of workpieces are present on the conveyance path; and a stopper mechanism provided at each of the plurality of stations, wherein the stopper mechanism is provided from the first detection unit. The derived work presence / absence detection signal and the second
The actuator cooperates with one actuator that is energized by a predetermined number of work presence / absence detection signals on a transport path to a next station derived from the detection unit and a shaft connected to one end of the actuator. A first link mechanism and a second link mechanism, a first locking claw that engages with a workpiece under a rotating action of a first camshaft connected to the first link mechanism, and is connected to the second link mechanism. that the second and a second locking claw to engage the workpiece under a work times camshaft, word derived from said first detection means
Detection signal indicating the absence of the
A predetermined number on the transport path to the next station derived from
Based on the detection signal that the workpiece exists,
1 Raise the locking claw from the conveyor surface and
The second locking claw is lowered from the conveying surface of the conveyor.
The existence of the work derived from the first detecting means exists
And the next signal derived from the second detection means.
There is no specified number of workpieces on the transport path to the station
The first locking claw on the conveyor based on the detection signal
Down from the transfer surface of the
It is raised from the conveying surface of bare, the first locking claw and a second
The locking claw cooperates with the first link mechanism and the second link mechanism.
Under the action, the first camshaft and the second camshaft are shared.
More it is rotated, elevated and second engagement of the first locking claw
Lowering of the pawl, lowering of the first pawl, and raising of the second pawl
Are performed substantially simultaneously, and the first locking claw and the second locking claw are alternately lifted from the conveying surface of the conveyor.
It is characterized in that the work is sequentially intermittently fed for each successive station by engaging with the conveyed work.

[0008]

In the conveyor device according to the present invention, when a predetermined number of workpieces conveyed on the conveyor are continuously stocked on the conveyor, the first detecting means detects the state and sends a signal to the stopper mechanism. Next, the stopper mechanism operates to temporarily stop the work, that is, the continuously conveyed work is stocked by the stopper mechanism. When the second detecting means detects that the next conveyor has become vacant and the stock state has been eliminated, the stopper mechanism is operated to transport the held workpiece to the next conveyor. Therefore, a predetermined number of workpieces on the conveyor can be stocked for each stopper mechanism disposed at a predetermined location on the conveyor, and interference between the workpieces is prevented. Further, the stock amount can be set in advance, and an excessive load is not applied to the conveyor and the stopper mechanism.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of a conveyor device according to the present invention will be described below in detail with reference to the accompanying drawings.

In FIGS. 1 to 6, reference numeral 10 denotes
1 shows a conveyor device according to the present embodiment. The conveyor device 10 is connected and provided over a plurality of stages.
For example, a conveyor 12 that transports a crankshaft 14
a, 12b, 12c and the conveyors 12a to 12c
Detecting means ( second detecting means) 1 disposed at a predetermined position above
6a, 16b, 16c and the conveyors 12a to 12
c, stopper mechanisms 18a, 18b, 1
8c.

In this case, a plurality of frames 20 extending upward from the floor are erected, and two rails 22a and 22b are installed on a beam bridged between the frames 20. A conveyor chain 30 is provided on the rails 22a and 22b. The conveyor chain 30 includes connecting plates 26a and 26b connecting the plurality of chain portions 24.
And connecting pins 28 on both outer sides of the connecting plates 26a and 26b.
Attachment 27 attached via a, 28b
a, 27b, especially the attachments 27a, 2b
7b is subjected to an abrasion resistance treatment (see FIG. 6). The conveyor chains 30 are supported by the respective frames 20 and are continuously provided to form conveyors 12a to 12c of a predetermined length. These conveyors 12a to 12c
And a second station 3 for detecting the stock state of the crankshaft 14 and temporarily holding the same.
4, 36, and a fourth unloading crankshaft 14
Stations 38 are provided.

The loading ends of the conveyors 12a to 12c (FIG. 1)
(Left side in FIG. 1), a carry-in / transfer device 40 for loading the crankshaft 14 is provided, and a carry-out / transfer device 42 for taking out the crankshafts 14 on the conveyors 12a to 12c one by one at the carry-out end. Have been.
The carry-in / transfer device 40 and the carry-out / transfer device 42 include lifters 40a and 42a on which the crankshaft 14 is placed,
The lifters 40a and 42a are configured so as to be vertically displaceable under the urging action of a driving source connected to a control device, and to be movable in the left and right directions along a rail (not shown). ing.

Detecting means 16a to 16c are provided at predetermined positions (first to third stations in FIG. 1) of the frame 20 via brackets. This detection means 1
6a to 16c are sensors, for example, a proximity switch 44.
And a guide plate 48 which is supported by a fulcrum 46 provided in the vicinity of the end and has a U-shape that swings vertically.
The proximity switch 44 is mounted within the swing range of the guide plate 48 (see FIG. 2). This proximity switch 44
When the guide plate 48 comes into contact with the crankshaft 14 and is displaced upward and directed, a signal is sent to a control device (not shown). In response to this signal, the first station 3
In step 2, the loading / transferring device 40 is operated, and the second and third
In the stations 34 and 36, the stopper mechanisms 18a to 1
8c respectively.

Second to fourth stations 34, 36, 3
8, stopper mechanisms 18a to 18c are arranged on the side of the conveyors 12a to 12c. The stopper mechanisms 18a to 18c include an actuator 50, a first link mechanism 52 displaced by the actuator 50,
A second link mechanism 54, the first and second link mechanisms 52,
The first locking pawls 56a and 56b fixed to 54 and holding the crankshaft 14 include the second locking claws 58a and 58b. As shown in FIG. 4, one end of the actuator 50 is rotatably engaged with a bracket 62 fixed to a frame 60 via a shaft 64, and is turned around the tip of a rod 50 a of the actuator 50 via a shaft 66. A movable shaft 68 is engaged. This shaft 68 has a shaft 70
The first arm 74a and the first guide 76a are fixed to the first shaft 70a. One end of the first arm 74a is engaged with a first pin 72a fixed to the frame 60, while one end of the first guide 76a is
A first cam 80a rotatable via 8a is engaged.

The first cam 80a is connected to a first camshaft 82a via a bearing (not shown) provided on the frame 60.
(See FIG. 3). This first camshaft 8
Two first locking claws 56a, 56b whose tips are bent like hooks are attached to substantially the center of 2a.

The shaft 68, the first arm 74a,
The first link mechanism 52 is constituted by the first guide 76a and the first cam 80a. Further, two guide rods 86a and 86b are fixed to the shaft 84 attached to the outside of the first cam 80a with a predetermined distance therebetween. The guide bar 86a is set so as to be horizontal when the first locking claws 56a, 56b reach the lower limit position.
It is set to be horizontal when a and 56b reach the upper limit position. When the guide rods 86a and 86b reach the horizontal state, claw open / close confirmation switches 88a and 88b for detecting the horizontal state are provided on a bracket 90 fixed to the frame 60.

A second arm 74b and a second guide 76b are engaged with a second shaft 70b of the shaft 68, and the second arm 74b is rotatably connected to a second pin 72b fixed to the frame 60. It is pivoted. Second guide 76b
A second cam 80b that is rotatable via a shaft 78b is engaged with one end of the second cam 80b.
b (see FIG. 3). Two second locking claws 58a and 58b whose tips are bent like hooks are attached to predetermined positions at both ends of the second camshaft 82b. The shaft 68, the second arm 74b, the second guide 76b, and the second cam 80b constitute the second link mechanism 54.

The first link mechanism 52 and the second link mechanism 54 constitute the conveyors 12a to 12c with the first locking claws 56a, 56b and the second locking claws 58a, 58b alternately driven by the actuator 50. To protrude from the belt surface. That is, when the first locking claws 56a and 56b rise and hold the crankshaft 14, the second locking claws 58
a, 58b descend. On the other hand, the first locking claws 56a, 56
b descends and conveys the crankshaft 14 to the next stage conveyor, the second locking claws 58a, 58b immediately rise to stop the next crankshaft 14, and the crankshaft 14 continuously moves to the next stage. Prevents transport on conveyor. A work confirmation proximity switch ( first detecting means) 92 for detecting the presence of the conveyed crankshaft 14 is provided between the first locking claws 56a and 56b and the second locking claws 58a and 58b. Is being worn.

Next, the operation of the conveyor device 10 according to the present embodiment configured as described above will be described.

The carry-in / transfer device 40 on which the crankshaft 14 is placed is moved to the carry-in place of the conveyors 12a to 12c, and the detecting means 16a provided in the first station 32
16c detects that there is no crankshaft 14 on the conveyors 12a to 12c and sends a signal to the carry-in / transfer device 40, the crankshaft 14 is transferred upward through the lifter 40a. Rails 22a, 22b
The crankshaft 14 is fed from the loading / transferring device 40 to the conveyor chain 30 rotating upward, and is conveyed toward the second station 34.

In the stopper mechanisms 18a to 18c provided in the second station 34, the first locking claws 56a,
6b is in a state of rising and protruding from the belt surfaces of the conveyors 12a to 12c, while the second locking pawls 58a and 58b are in a state of being lowered, and the conveyed crankshaft 14 is in the state of the protruding first engaging member. claws 56a, with temporarily held in contact with the 56b, to detect the presence of the crankshaft 14 for the work confirmation proximity switch is energized. The guide rod 86b is also close to the claw opening and closing check proximity switch 88b with the displacement of the first link mechanism 52, thereby urging the pawl opening and closing check proximity switch 88b. On the other hand, since the guide plates 48 of the detection means 16a to 16c do not abut on the crankshaft 14, they move vertically by their own weight and are separated from the proximity switch 44.

Next, when the proximity switch 44 is deactivated and the workpiece confirmation proximity switch 92 and the claw open / close confirmation proximity switch 88b are each activated, the signal is sent to a control device (not shown). Can be As a result, the actuators 5 of the stopper mechanisms 18a to 18c
Under the zero drive action, the shaft 68 is displaced to the left in FIG. As a result, the first link mechanism 52 is displaced, and the first locking claws 56a, 56b are moved from the conveyors 12a to 12a.
2c is lowered below the belt surface,
The second link mechanism 54 is displaced and the second locking claws 58a, 58
b is raised to project from the belt surface. Therefore,
The crankshaft 14 is released from the holding state of the first locking claws 56a and 56b and is conveyed toward the third station 36, and the next crankshaft 14 contacts the second locking claws 58a and 58b. And temporarily stopped.
Thus, the crankshaft 14 is connected to the next stage of the conveyor 1.
It is always transported one by one to 2a to 12c, and is not transported continuously.

The crankshaft 14 released from the first locking claws 56a, 56b abuts on the guide plate 48 of the detecting means 16a to 16c, and displaces the guide plate 48 upward about the fulcrum 46 as a center. . The proximity switch 44 is energized by the displacement of the guide plate 48, and the work confirmation proximity switch 92 is deactivated. Next, when the claw open / close confirmation proximity switch 88a detects that the first locking claws 56a and 56b are lowered, the first link mechanism 52 is displaced under the driving action of the actuator 50, and the first locking claw is displaced. Conveyors 12a to 12c by raising 56a, 56b
Of the second locking claw 58a,
58b is lowered. The next crankshaft 14, which has been stopped by the second locking claws 58a, 58b, starts to convey after confirming that the downstream conveyors 12a to 12c are free, and starts the first locking claw 56a, The crankshaft 14 is once held by contacting the crankshaft 56b.

Next, the crankshaft 14 that has reached the fourth station 38 via the third station 36 in which the same operation as that of the second station 34 is performed is stopped by the stopper mechanism 1.
The first engaging claws 56a and 56b of 8a to 18c abut and are once held. Proximity switch 94 installed at the unloading location
Detects that there is no crankshaft 14, the first locking claws 56a, 56b holding the crankshaft 14 descend under the driving action of the actuator 50, and convey the crankshaft 14 to the unloading place. At the same time, the second locking claws 58a, 58b rise to stop the next crankshaft 14. On the other hand, the conveyed crankshaft 14 is transferred to the unloading and transferring device 4
And is moved to a predetermined place.

While the crankshaft 14 is present at the fourth station 38 and the proximity switch 94 is energized and the detection of the crankshaft 14 is continued, the crankshaft 14 is moved by the first locking claws 56a and 56b. Holding.

When the unloading / transferring device 42 is stopped and the first locking claws 56a, 56b of the fourth station 38 continuously hold the crankshaft 14, the plurality of continuously conveyed crankshafts 14 are moved. While abutting each other,
A predetermined amount is continuously stocked on the conveyors 12a to 12c between the third station 36 and the fourth station 38. Then, the guide plates 48 of the detecting means 16a to 16c in the third station 36 abut on the crankshaft 14 that has become unable to be conveyed, and remain displaced upward. Thereby, the proximity switch 44
The connection between the third station 36 and the fourth station 38
A predetermined number of crankshafts are placed on the conveyors 12a to 12c.
The first locking pawls 56a and 56b of the third station 36 continue to be raised by the signal that the stock 14 has been stocked . Accordingly, the crankshaft 14 held by the first locking claws 56a and 56b of the third station 36 abuts on the next crankshaft 14 conveyed from the second station 34, and the crankshaft 14 is successively moved to the second crankshaft 14. Are stocked on the conveyors 12a to 12c between the third stations 34 and 36. However, the crankshaft 14 continuously stocked between the third station 36 and the fourth station 38 has the first locking claws 56a of the third station 36 ,
The crankshaft 14 is held by 56b
Without pressing force is applied to the stopper mechanism 18a
To 18c can be avoided.

Further, the crankshaft 14 is disposed on a transport path between the second station 34 and the third station 36.
When There will successively by a predetermined quantity stock state, the
The specified number of crankshafts 14 is stocked
Is detected by the proximity switch 44 of the second station 34 ,
The signal keeps the first locking claws 56a and 56b of the stopper mechanisms 18a to 18c in the second station 34 from rising. As a result, the crankshaft 14 stocked between the second and third stations 34, 36
Is not affected by the pressing force of the conveyed crankshaft 14 as described above .

When the unloading / transferring device 42 is operated and the crankshaft 14 on the conveyors 12a to 12c in the fourth station 38 is unloaded, the first locking claws 56a,
56b is lowered to transport the crankshaft 14 to the carry-out side, and the second locking claws 58a and 58b are raised to temporarily stop the next crankshaft 14. When the claw opening / closing confirmation proximity switch 88a detects that the work confirmation proximity switch 92 is deactivated and the first engagement claws 56a, 56b are lowered, the first engagement claws 56a, 56
As b rises, the second locking claws 58a, 58b move down, and the next crankshaft 14 is transported and abuts on the first locking claws 56a, 56b. Then, the guide plate 48 of the third station 36 is displaced downward, the proximity switch 44 is deactivated, and the detection of the workpiece confirmation proximity switch 92 causes the first locking claws 56a, 56b to move down, thereby causing the second and second switches to move. 3
The crankshafts 14 between the stations 34 and 36 are conveyed one by one to the next-stage conveyors 12a to 12c.

As described above, when one of the crankshafts 14 on the conveyors 12a to 12c is unloaded and the next conveyor becomes empty, the respective stations 34, 36,
The crankshafts 14 held by the 38 stopper mechanisms 18a to 18c are moved one by one toward the next conveyor, and the respective stations 34, 36, 38
The maximum quantity of the crankshafts 14 stocked within the extension distance of the above is kept constant.

[0030]

According to the conveyor device of the present invention, the following effects can be obtained.

The work conveyed on the conveyor continuously stays on the conveyor, and when the detecting means detects the state, the stopper mechanism temporarily holds the work in response to a signal from the detecting means. Thereby, it is possible to hold the work at intervals of the stopper mechanism disposed at a predetermined position on the conveyor, to prevent mutual interference of the work between the stopper mechanisms, and to avoid damage to the stopper mechanism. . In addition, since the number of works placed on each conveyor is equal, it is possible to avoid the problem that the load is excessively applied to only some of the conveyors.

Also, the first operation is performed under the driving action of the actuator .
First locking by rotating the link mechanism and the second link mechanism
Since the claws and the second locking claw by alternately protrude from belts surface for holding the workpiece, the first locking claw and the workpiece one by one
It is held by the second locking claw, and keeps the posture of the workpiece during conveyance constant.
Can be held . Furthermore, in the present invention, one
The first link mechanism and the second link mechanism are driven under the action of the actuator.
The two link mechanisms work together to perform the link function.
Corresponding to the first and second link mechanisms.
Eliminates the need for multiple actuators and reduces the number of parts
It can be manufactured at low cost.

[Brief description of the drawings]

FIG. 1 is a schematic front view of a conveyor device according to the present invention.

FIG. 2 is a partially enlarged view of a detection unit and a stopper mechanism of the conveyor device.

FIG. 3 is a partially enlarged plan view of a stopper mechanism of the conveyor device.

FIG. 4 is an operation explanatory view showing a state where a first locking claw holds a work in a stopper mechanism of the conveyor device.

FIG. 5 is an operation explanatory view showing a state in which a second locking claw stops a work in a stopper mechanism in the conveyor device.

FIG. 6 is an explanatory perspective view of a conveyor chain used in the conveyor device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 ... Conveyor apparatus 12a-12c ... Conveyor 14 ... Crankshaft 16a-16c ... Detecting means 18a-18c ... Stopper mechanism 30 ... Conveyor chain 44 ... Proximity switch 48 ... Guide plate 50 ... Actuator 52 ... 1st link mechanism 54 ... 2nd Link mechanism 56a, 56b: first locking claw 58a, 58b: second locking claw 86a, 86b: guide rod 88a, 88b: claw open / close confirmation proximity switch 92: workpiece confirmation proximity switch 94: proximity switch

 ──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor, Kazuyoshi Tanibo 3-95, Noshiro-machi, Nonoichi, Ishikawa-gun, Ishikawa (56) References JP-A-63-27319 (JP, A) JP-A-60-171919 (JP, A) Tokiko 55-31059 (JP, B2)

Claims (2)

(57) [Claims] 1. A plurality of conveyors connected to each other for conveying a work, a plurality of stations divided at substantially equal intervals along a conveying path of each of the conveyors, and a plurality of stations provided at each of the plurality of stations. It is, first detects a first detection means for detecting the presence or absence of word over click, provided to each of said plurality of stations, whether or not a predetermined number of work on the transport path to the next station is present 2 detecting means, and a stopper mechanism provided in each of the plurality of stations, wherein the stopper mechanism is derived from the first detecting means.
A work presence / absence detection signal and a predetermined number of wafers on the transport path to the next station derived from the second detection means.
A first actuator that is energized by the presence / absence detection signal and a first link mechanism and a second actuator that cooperate via a shaft connected to one end of the actuator.
A link mechanism, a first locking claw that engages with a workpiece under a rotating action of a first camshaft connected to the first link mechanism, and a rotation of a second camshaft connected to the second link mechanism. A second locking claw that engages with the work during operation, and that there is no work derived from the first detection means.
And the next signal derived from the second detection means
There is a predetermined number of workpieces on the transport path to the station
The first locking claw on the conveyor based on the detection signal
And the second locking claw is
Lower from the conveying surface of the bear, while the first detecting means
The detection signal of the existence of the work derived from
2 Transport to the next station derived from the detection means
Based on the detection signal that there is no specified number of workpieces on the road,
Then, lower the first locking claw from the conveying surface of the conveyor.
And raise the second locking claw from the conveying surface of the conveyor.
Raising, the first locking claw and a second locking claw, the first link mechanism Contact
1st camshaft and 2nd link mechanism
By rotating both the second camshaft and the second camshaft,
Raising the first locking claw, lowering the second locking claw, and the first locking claw
Set as lowering the increase of the second locking claw of are performed substantially simultaneously
Vignetting, by engaging with the first locking claw and the workpiece being conveyed is raised alternately and second locking claw from the conveying surface of the conveyor, the station every successive sequential workpieces,
A conveyor device characterized by intermittent feeding. 2. The conveyor device according to claim 1, wherein
(2) The detecting means is provided for detecting a workpiece conveyed along the conveyor.
Conveyor device comprising a guide plate which swings based on fulcrum by contact, to have a sensor disposed to the swing position of the <br/> guide plate.