JPH0444484Y2 - - Google Patents

Description

[Detailed explanation of the invention] [Purpose of the invention] (Field of industrial application) The invention is for sorting workpieces such as multiple or single types of sheet materials cut according to the board cutting procedure using a blanking shearing machine, for example. , relates to a work lifter device that is useful for use in a work sorting and accumulating device.

(Prior Art) Conventionally, for example, a workpiece such as a sheet material sheared by a blanking shearing machine is subjected to a sorting process on the same plane as the carry-out pass line. That is, one sorting method is to arrange a plurality of conveyors in the longitudinal direction of the carry-out pass line, provide a flapper between the plurality of conveyors, and further provide a collection section below the flapper to sort the workpieces. Workpieces are accumulated in the accumulation section by raising each flapper according to the type of workpiece. Alternatively, as another sorting method, a roller conveyor is arranged in the longitudinal direction on the carry-out path line, a work pusher is provided on one side at an appropriate position of the roller conveyor, and a collection section is provided on the other side. The workpieces are accumulated in the workpiece accumulation section.

By the way, in the conventional workpiece sorting method described above, when the number of types of workpieces to be sorted increases, the length of the sorting conveyor increases, and the area occupied by the sorting and accumulating device in the factory increases. Therefore, if space within the factory is limited,
There is a problem in that the types that can be sorted are limited.

Alternatively, for example, there is a problem in that the more types of workpieces that are cut by a blanking shearing machine or the like are to be sorted, the longer it takes to be transported to the final sorting section, resulting in lower processing capacity.

(Problems to be solved by the invention) In order to solve the above-mentioned problems, a work accumulation shelf having a plurality of stages of work accumulation sections for accumulating work is arranged on one side of the conveyor, and On the other side of the conveyor, there is a workpiece sorting and accumulating device in which a worklifter device comprising a vertical rotary conveyor equipped with a large number of worklifter members capable of lifting the workpieces to a height corresponding to the workpiece accumulation section is arranged. We are researching and developing.

However, in the above-mentioned work lifter device, there is a problem that the rotation radius of the work lifter member is larger than that of a vertical rotary conveyor, and the moment of inertia is also large. There was a problem with vertical space.

In addition, it was difficult to match the pass line of the machine in the previous process.

The present invention enables the work lifter member to be bent without depending on the work size, reduces the radius of rotation at the center of gravity of the work lifter member, reduces the moment of inertia, and eliminates waste of space in the vertical direction in the entire device. An object of the present invention is to provide a work lifter device that enables matching of pass lines of a machine in a previous process.

[Structure of the invention] (Means for solving the problem) In order to achieve the above-mentioned purpose, the present invention provides a system that can freely lift the workpieces at the workpiece sorting position to a height position corresponding to the workpiece accumulation section on the workpiece accumulation shelf. This work lifter device includes a vertical rotary conveyor that rotates in one direction, and a tip arm that can be bent into a comb-like main body arm that is provided in plurality at appropriate intervals in the longitudinal direction of the vertical rotary conveyor. and a state in which the tip arm is bent with respect to the main body arm at the lower part of the vertical rotary conveyor when the work lifter member is rotated by the vertical rotary conveyor at least in the lower part of the vertical rotary conveyor. A work lifter device is provided with a fixed guide that guides the workpiece.

(Function) By employing the work lifter device of the present invention, when the vertical rotary conveyor is rotated in one direction,
In the lower rotating section, the tip arm of the work lifter device is bent with respect to the main body arm, and the tip portion of the tip arm is guided by the fixed guide and rotated. Thus, the work lifter device can lower the rotational position of the lower part of the vertical rotary conveyor to match the pass line with a machine such as a blanking and shearing machine, regardless of the work size.

Further, since the tip arm of the work lifter member is bent relative to the main body arm and guided by the fixed guide, the radius of rotation at the center of gravity of the work lifter member is reduced, and the moment of inertia can be reduced.

Since the space in the vertical direction of the vertical rotary conveyor can be reduced, waste of space can be avoided.

(Example) Hereinafter, an example of the present invention will be described in detail based on the drawings.

Referring to FIGS. 1, 2, and 3, approximately at the center of the base 3 extending in the left-right direction in the workpiece sorting and accumulating device 1, the workpieces cut by, for example, a blanking and shearing machine are sorted. A work conveyor 5 for conveying the workpieces upward as shown by the arrow in FIG. 2 for stacking is installed vertically. The workpiece conveyor 5 includes side frames 7R and 7L extending vertically in FIG. 2 on the base 3, and a structure at an upper portion between the side frames 7R and 7L at an appropriate interval in the vertical direction in FIG. The conveyor belt consists of a plurality of rotatable roller conveyors 9 and the like.

A drive device 13 such as a motor is provided on the horizontal frame 11 attached between the side frames 7R and 7L, and the plurality of roller conveyors 9 can be freely rotated by the drive device 13. .

With the above configuration, the work cut by, for example, a blanking shearing machine is placed on the roller conveyor 9 of the work conveyor 5, and is conveyed from the bottom to the top as shown by the arrow in FIG. Then, it is stopped at the workpiece sorting position 15.

A plurality of frames 17 are erected on the base 3 on one side, for example, the right side of the workpiece sorting position 15, and the frames 17 are vertically movable as a workpiece lifter device to lift the workpieces upward from the workpiece sorting position 15. A vertical rotary conveyor 21 for driving a work lifter member 19 is provided.

A work accumulation shelf 23 consisting of a plurality of frames is erected on the base 3 on the other side, for example, the left side, facing the work lifter device at the work sorting position 15.

The vertical rotary conveyor 21 is shown in FIGS.
In the figure, the frame 17 has a plurality of upper sprockets 25 and a plurality of lower sprockets 27 at its upper and lower parts. Its upper sprocket 25
A chain 29 is wound around the lower sprocket 27 and the lower sprocket 27.

On one side of the upper part of the frame 17, for example in the lower part in FIG.
A drive device 31 for driving 1 is provided. The drive device 31 includes a motor 33 and a reducer 35
A pulley 37 attached to the reducer 35, and a rotating shaft 39 of the upper sprocket 25.
A belt 43 such as a timing belt is wound around a pulley 41 attached to one end of the belt.

A plurality of square columnar workpiece lifter members 19 are attached to the chain 29 at predetermined intervals in the longitudinal direction of the chain 29, and each of the lift arm members 19 is integrated in a comb blade shape in the vertical direction as shown in FIG. has been made into

As shown in FIG. 4, each work lifter member 19 includes a main body arm 45, a tip arm 47, and a roller 49 rotatably supported at the tip of the tip arm 45.
It is made up of. At a connecting portion 51 between the main arm 45 and the distal arm 47, the distal arm 47 is bent relative to the main arm 45, and when the distal arm 47 returns parallel to the main arm 45, , is restored by the biasing force of a spring 53 provided at the connecting portion 51 with the main body arm 45.

As shown in FIGS. 3, 5 and 6, the chain 29 wound around the upper sprocket 25 and lower sprocket 27 of the vertical rotary conveyor 21 has an inverted L-shaped mounting plate. The main body arm 45 of the work lifter member 19 is attached via 55.

The inner guide 5 serves as an arm guide for vertically moving and rotating the main body arm 45.
7 and an outer guide 59 are provided along the locus of movement of the chain 29 as shown in FIGS. 3 and 6. Although FIG. 6 shows the lower state of the inner guide 57 and the outer guide 59, the upper state is provided symmetrically with the lower state, and the specific structure is almost the same.

Three cam followers 61, 63, and 65 are attached to the mounting plate 55. The cam followers 61 and 63 are guided by sandwiching an inner guide 57, and the cam followers 65 are positioned below the cam followers 63. Outer guide 59
The mounting plate 55 moves between the straight part and the turning part by being guided by the mounting plate 55. Thus, the work lifter member 19 is connected to the inner guide 57 and the outer guide 59.
Straight line and turning movements will be performed under the guidance of

As shown in FIGS. 1 and 3, a curved fixed guide 67 is provided on the lower side of the frame 17, and when the work lifter member 19 is rotated as shown by the arrow in FIG. The roller 49 of the tip arm 47 is guided by the guide 67, and the tip arm 47 is bent and rotated.

With the above configuration, when the motor 33 of the drive device 31 is driven, the rotation of the motor 33 is decelerated by the reducer 35, and the pulley 37, belt 43, pulley 41
The upper sprocket 25 is rotated through. Since the chain 29 is wound around the upper sprocket 25 and the lower sprocket 27, the rotation of the upper sprocket 25 is transmitted to the chain 29.

A comb-shaped work lifter member 19 is attached to the chain 29.
are attached at appropriate intervals, so when the chain 29 is rotated clockwise in FIG. 1, the work lifter member 19 is rotated in the same direction.

The workpiece lifter member 19 is attached to the tip arm 4 at the pivot point in the lower part of FIGS. 1 and 3, for example.
The roller 49 attached to the tip of the arm 7 rotates while being guided by the curved fixed guide 51, so that the tip arm 47 is rotated in a bent state with respect to the main body arm 45.

When the work lifter member 19 moves from the rotating part to the straight part, the tip arm 47 is moved by the biasing force of the spring 53 provided in the connecting part 51 to the main body arm 4.
It is returned to the original state in parallel to 5.

The workpieces placed on the roller conveyor 9 at the workpiece sorting position 15 are transferred onto the main body arm 45 and the tip arm 47 of the comb-shaped work lifter member 19 that has moved, and the workpieces are transferred onto the main body arm 45 and the tip arm 47. The workpiece is placed on top of the workpiece and stopped at a predetermined workpiece retraction position.

Therefore, the tip arm 47 is connected to the main body arm 45.
By bending the lower sprocket 27, the center of the lower sprocket 27 can be lowered, regardless of the size of the workpiece, and can be aligned with the pass line of the workpiece conveyor 5. By bending the tip arm 47,
The radius of rotation of the center of gravity of the workpiece lifter member 19 on the circumference of the lower sprocket 27 is reduced, and the moment of inertia can be reduced.

Additionally, a curved fixed guide 51 may be provided above the upper sprocket 25 to accommodate this. By providing the upper and lower fixed guides 51 and bending the tip arm 47, it is possible to save space in the vertical direction.

When the tip arm 47 of the work lifter member 19 is released from the left end in FIG.
The spring 53 provided in the connecting part 51 against
The biasing force returns it to its horizontal state, that is, its original state. However, at this time, large vibrations occur due to the inertia due to the biasing force of the spring 53 and the inertia of the tip arm 47 itself. In order to prevent this vibration from occurring, a movable guide 69 that can move forward and backward in the horizontal direction in FIG. 3 is connected to the left end of the fixed guide 67.

That is, in FIG. 3, an air cylinder 71 is attached to the lower frame 17D of the frame 17, and the air cylinder 71
A piston rod 73 is provided. A movable guide 69 having a curved surface that follows the curved shape of the fixed guide 67 is attached to the tip of the piston rod 73.

With the above configuration, the tip arm 47 of the work lifter member 19 is bent relative to the main body arm 45, and the roller 49 rotatably supported at the tip of the tip arm 47 comes into contact with the fixed guide 67 and is guided. The movable guide 69 is temporarily stopped on the curved surface. Next, the air cylinder 71 is operated to move the movable guide 69 backward through the piston rod 73 to the left in FIG. 3, thereby gradually releasing the bent end arm 47 and returning it to its original state. . Since the vibration of the tip arm 47 is suppressed, there is no fear of damage to various parts due to vibration.

The workpiece accumulation shelf 23 is constructed of a plurality of vertical frames 75V and a horizontal frame 75H in FIG. 77 is provided. Each work accumulation section 77
A workpiece retracting device 79 is provided in the upper part.

Each work accumulating section 77 has a horizontal frame 75.
A pallet P is placed on H, and works W are accumulated on the pallet P.

The specific structure of each workpiece retracting device 79 is shown in FIG. That is, in FIG. 7, a fixed guide 81 extending in the left-right direction is attached to the lower part of the upper horizontal frame 75H. A movable guide 83 is provided that is movable in the left and right direction, which is a horizontal direction, with respect to the fixed guide 81. For example, the rear end of an air cylinder 85 serving as a driving source for horizontally moving the movable guide 83 is attached to the fixed guide 81.

A piston rod 87 attached to the tip of the air cylinder 85 is fixed to the movable guide 83. Therefore, the actuation of the air cylinder 85 causes the piston rod 87 to extend to the right in FIG. 7 and move the movable guide 83 to the right. A retraction arm 89 extending in the left-right direction is provided at the lower part of the movable guide 83.

Sprockets 91 and 93 are provided on the left and right sides of the movable guide 83, a chain 95 is wound around the sprockets 91 and 93, and the retracting arm 89 is attached to a part of the chain 95. installed.

A forward end stopper 97 and a rear end stopper 99 are attached to the front and rear ends of the movable guide 83. Further, a swing arm 101 is supported by a block member 103 at the lower part of the retractable arm 89, and a bifurcated link plate 105 is attached to the opposing rear end portions of the retractable arm 89 and the swing arm 101. It is being

A support arm 107 is provided which is supported at the tip of the retractable arm 89 and extends in the left-right direction at the lower part of the swing arm 101.

A rotatable shaft center portion 109 is supported approximately at the center in the longitudinal direction of the retractable arm 89, and an arm member 111 extending rightward in FIG. 7 is integrated into the shaft center portion 109. There is. A work holding roller 113 is attached to the lower part of the tip of the arm member 111. The work holding roller 113 is urged downward by a spring 115 attached to the retracting arm 89.

A quadrangular prism-shaped arm member 117 extending upward is integrated into the shaft center portion 109, and a quadrangular prism-shaped arm member 119 extending rightward in FIG. 7 is attached to the arm member 117. . A cam follower 121 is rotatably supported at the tip of the arm member 119. A cam follower guide 123 for guiding the cam follower 121 is provided on the movable guide 83. Horizontal frame 75 on which the pallet P is placed
At the tip of H is a work scraper 12 that can move up and down.
5 is installed.

With the above configuration, when the work lifter member 19 on which the work is placed is stopped at the work retraction position,
The air cylinder 85 of the workpiece pulling device 79 is operated, and the piston rod 87 of the air cylinder 85 moves the movable guide 83 to the right in FIG. The speed is doubled by the wound chain 95, and the work moves forward to the right to the work retraction position.

At that time, the cam follower 121 is guided by the cam follower guide 123 and the work holding roller 113
is pressed against the support arm 107 as shown in FIG. 8, and on the way, the cam follower 121 comes off the cam follower guide 123 as shown in FIG. It lifts up.

When the retractable arm 89 advances to the forward end, the swing arm 1 attached to the retractable arm 89
01 link plate 105 is the forward end stopper 9
7, the swing arm 101 is tilted forward to attract the work W. This state is maintained until the link plate 105 hits the retreat end stopper 99. Note that when the retractable arm 89 stops at the forward end, each of the plurality of support arms 107
enters below between the respective work lifter members 19 and is stopped.

When the swing arm 101 is in the forward downward state and the retracting arm 89 is moved backward or to the left as shown in FIG. 10 by the operation of the air cylinder 85, the work W placed on the work lift member 19
moves onto the support arm 107 of the retracting arm 89 and carries it onto the pallet P of the work accumulation section 77. At this time, the work scraper 125 is waiting at the lower end.

Further, while the retraction arm 89 is retracting, the cam follower 121 is again guided by the cam follower guide 123, and the work holding roller 113 presses the work W against the support arm 107.

When the retraction arm 89 returns to the retreat end,
The link plate 105 of the swing arm 101 hits the rear end stopper 99 and the swing arm 101
is in a front-up state (the state shown in Fig. 3).

Further, the work scraper 125 is raised depending on the backward end signal of the retracting arm 89. When the retraction arm 89 moves forward again in the next process, the workpiece W on the support arm 107 is scraped onto the pallet P by the workpiece scraper 125 which is rising.

By repeating this process, the workpiece lifter member 19 lifts the workpieces from the sorting position to the workpiece retraction position, and then the workpiece retraction device 79 stacks the workpieces from the workpiece retraction position to the workpiece accumulation section 77 at the workpiece accumulation position. The workpieces are transported from a predetermined workpiece retraction position to a workpiece collection position depending on the type of workpieces to be sorted.

In this way, a workpiece lifter device that can move up and down is provided on one side of the workpiece sorting position 15 orthogonal to the workpiece conveyance direction, and a workpiece retracting device 79 that can freely move in the horizontal direction faces the workpiece lifter device and is movable in the horizontal direction on the other side of the workpiece sorting position. By providing a work accumulation shelf 23 having a plurality of pairs of workpieces and workpiece accumulation sections 77, it is possible to save space in terms of floor space such as the area for sorting and accumulation. At the same time, the time for sorting and accumulating workpieces can be shortened compared to the conventional method.

Moreover, the workpiece accumulating section 7
The workpiece W can be smoothly and reliably drawn into the workpiece 7 by the horizontally movable workpiece drawing device 79.

Further, since the workpiece pulling device 79 is equipped with a workpiece holding roller 113, even if the workpiece W placed on the support arm 107 is pulled in at high speed, the workpiece holding roller 113 works and the workpiece is displaced in the stroke direction. The workpieces W can be drawn into the workpiece accumulating section 77 without any occurrence of the problem, and the workpieces W can be evenly stacked in the workpiece accumulating section 77.

Note that the present invention is not limited to the embodiments described above, but can be implemented in other forms by making appropriate changes.

[Effects of the invention] As can be understood from the explanation of the embodiments as described above, according to the present invention, the vertical conveyor of the work lifter device can When rotated in the direction of
In the lower rotating section, the tip arm of the work lifter device is bent with respect to the main body arm, and the tip portion of the tip arm is guided by the fixed guide and rotated. Thus, the lower rotational position of the vertical rotary conveyor can be lowered to match the pass line of a machine such as a blanking shearing machine, regardless of the size of the workpieces to be sorted.

Further, since the tip arm of the work lifter member is bent relative to the main body arm and guided by the fixed guide, the radius of rotation at the center of gravity of the work lifter member is reduced, and the moment of inertia can be reduced. Since the space in the vertical direction in the vertical rotary conveyor can be reduced, waste of space can be avoided.

[Brief explanation of the drawing]

FIG. 1 is a front view of a work sorting and accumulating device which is an embodiment of the work lifter device of the present invention, and FIG. 2 is a plan view of FIG. 1. Third
The figure is an enlarged sectional view with the work lifter device taken out, FIG. 4 is an enlarged sectional view of the work lifter member, FIG.
It is an enlarged view of the arrow direction part in a figure. Figure 7 is an enlarged front view showing the structure of the workpiece pulling device;
9 and 10 are explanatory diagrams illustrating the operation of the workpiece pulling device. 1... Work sorting and accumulation device, 5... Work conveyor, 15... Work sorting position, 19...
... Work lifter member, 21 ... Vertical rotary conveyor, 23 ... Work accumulation shelf, 45 ... Main body arm, 47 ... Tip arm, 67 ... Fixed guide,
69...Movable guide, 77...Work accumulation section, 7
9...Work pulling device, 81...Fixed guide,
83...Movable guide, 85...Retractable arm, 1
01... Swing arm, 107... Support arm, 113... Work holding roller.

Claims (1)

[Claims for Utility Model Registration] (1) A work lifter device that can freely lift the workpieces at the workpiece sorting position to a height position corresponding to the workpiece accumulation section on the workpiece accumulation shelf, and this worklifter device is a vertical a mold rotary conveyor, a work lifter member in which a bendable tip arm is connected to a plurality of comb-like body arms provided at appropriate intervals in the longitudinal direction of the vertical rotary conveyor, and at least below the vertical rotary conveyor. and a fixed guide that guides the work lifter member in a bent state relative to the main body arm at a lower part of the vertical rotary conveyor when the work lifter member is rotated by the vertical rotary conveyor. Work lifter device. (2) The connecting portion that connects the tip arm to the main body arm has a part that is bent relative to the main body arm when the tip arm is guided by the fixed guide, and returns to its original state when released from the fixed guide. The work lifter device according to claim 1, which is characterized by being provided with an elastic member to be returned to its original position.