JPH0716649Y2 - Work reversing device - Google Patents

Description

[Detailed Description of the Invention] A. Purpose of the Invention (1) Field of Industrial Application The present invention relates to a device for vertically inverting the posture of a work by using a reversing drum, and particularly to a plurality of types having different heights. The present invention relates to a work reversing device capable of reversing a work efficiently.

(2) Conventional Technology As a work reversing device for vertically reversing the posture of a work conveyed by a conveyor, a work reversing device disclosed in Japanese Utility Model Laid-Open No. 61-95717 is known.

The reversing device is provided with a reversing drum rotatable around its axis between the carry-in conveyor and the carry-out conveyor, and the work supplied from the carry-in conveyor to the reversing drum is 18 together with the reversing drum.
After rotating it by 0 °, it is discharged to the carry-out conveyor. As a result, the work is turned upside down from the posture of the carry-in conveyor and is discharged to the carry-out conveyor.

(3) Problems to be Solved by the Invention However, when reversing a work whose height is smaller than a predetermined value by the conventional reversing device, the bottom surface of the work after reversing becomes higher than the conveying surface of the carry-out conveyor. When the work is discharged from the reversing device to the carry-out conveyor, there is a problem that the work falls along the step between the two and is scratched. Also, when reversing a work whose height is larger than a predetermined value, the bottom surface of the reversed work becomes lower than the conveying surface of the carry-out conveyor, and the work interferes with the step between the two to make ejection difficult. There was a problem that became.

In order to solve the above problems, it is sufficient to prepare a plurality of reversing devices according to the height of each work, but if this is done,
Since it is necessary to install a separate conveyor line for each reversing device, not only the cost increases but also the productivity decreases.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a work reversing device capable of efficiently reversing a plurality of types of works having different heights.

B. Configuration of the Invention (1) Means for Solving the Problems In order to achieve the above-mentioned object, the present invention provides a reversing drum having a pair of guide rings at both ends and an outer peripheral surface of the guide ring. In a work reversing device, which comprises a roller that rotatably supports the reversing drum around its axis, rotates the work supplied into the reversing drum together with the reversing drum by 180 °, and discharges the work in a vertically inverted posture, The guide ring is composed of a circular true circular ring and an eccentric ring whose lower half peripheral portion overlaps with the true circular ring and whose upper half peripheral portion bulges outward from the true circular ring. A fixed roller that can contact the outer peripheral surface and a movable roller that can move in the axial direction of the reversing drum by the roller moving mechanism and can contact the outer peripheral surface of the eccentric ring. And it features.

(2) Operation According to the present invention having the above-described configuration, when reversing a work having a small height, the moving roller is retracted by the roller moving mechanism so as to be separated from the eccentric ring, and the fixed roller is used. 180 inversion drum with circular ring supported
° Rotate. As a result, the work in the reversing drum is turned upside down together with the reversing drum. On the other hand, when reversing a work having a large height, the moving roller is moved forward by the roller moving mechanism to abut the eccentric ring, and the reversing drive is rotated 180 ° while the moving roller supports the eccentric ring. By the action of the upper half of the eccentric ring that bulges outward, the work rises while turning upside down with the reversing drum, and the bottom of the work after reversing is the bottom of the bottom when reversing the low work. It is almost the same as the height.

(3) Embodiment An embodiment of the present invention will be described below with reference to the drawings.

1 to 5 show a work reversing device according to an embodiment of the present invention. FIG. 1 is its front view and FIG. 2 is FIG.
II-II arrow view, FIG. 3 is a side view taken along line III-III in FIG. 1, FIG. 4 is a sectional view taken along line IV-IV in FIG. 2, and FIG. 5 is an enlarged view of a switching lever portion. .

As shown in FIGS. 1 to 3, this work reversing device is provided with a carry-in conveyor C ₁ and a carry-out conveyor C ₂ arranged in series.
Is mounted on the base 1 provided between the opposite ends of
The reversing drum 2 is supported rotatably around an axis parallel to the conveying direction of both conveyors C ₁ and C ₂ .

The reversing drum 2 includes a pair of guide rings 3 and three longitudinal members 4
Are fixed to the front and rear ends with bolts 5, and a rail-shaped work cradle 6 is fixed to the inside thereof so as to be positioned at substantially the same height as the transfer level L of the conveyors C ₁ and C _2. There is. At the top of the column 8 erected on both ends of the workpiece receiving base 6 by bolts 7 are fixed mounting plate 9 having a long hole 9a, the height of small workpieces W ₁ and height to the mounting plate 9 A work holder 10 whose vertical position can be adjusted according to a large work W ₂ is fixed by a bolt 11 inserted into the elongated hole 9a. In addition, the bracket 12 provided at the center of the lower part of both guide rings 3
A stopper 13 is pivotally supported by a pivot shaft 14, and when the stopper 13 swings to the position shown in the figure, the stopper 13 comes into contact with both front and rear end surfaces of the works W ₁ and W ₂ to restrict the movement thereof. .

Each guide ring 3 is formed integrally with the circular true circular ring 15 located on the outside and the inside of the true circular ring 15. The lower semicircular portion overlaps with the true circular ring 15 and the upper semicircular portion includes the true circular ring. 15 and an eccentric ring 16 having an oval shape that bulges outward. The true circle ring 15 and the eccentric ring 16 are provided with outer peripheral surfaces 15a and 16a, respectively, and inner peripheral surfaces 15c and 16c formed by recesses 15b and 16b on both sides thereof.

The outer peripheral surfaces 15a of the two perfect circular rings 15 are supported by a fixed roller 20 which is axially supported by a shaft 18 fixed to a fixed base 17 integral with the base 1 via bearings 19. On the other hand, a roller moving mechanism 23, which will be described later, is slidably supported by a guide rod 22 fixed to brackets 21a and 21b provided upright on the base 1.
The slide base 24 driven by the shaft 25
A moving roller 27 axially supported by a bearing 26 is provided so as to face the fixed roller 20. Further, a small-diameter inner guide roller 29 and an outer guide roller 30 are axially supported by the slide base 24 and a mounting member 28 extending from the slide base 24 so as to face each other. As a result, when the pair of slide bases 24 are retracted in the direction of arrow A (FIGS. 2 and 3), the circular ring 15 of the guide ring 3 has its outer peripheral surface 15a supported by the fixed roller 20 and its inner peripheral surface. The outer guide roller 30 contacts the surface 15c, and the moving roller 27 and the inner guide roller 29 are separated from the eccentric ring 16. And a pair of slide bases
When 24 moves forward in the direction of arrow B (Figs. 2 and 3), the moving roller 27 contacts the outer peripheral surface 16a of the eccentric ring 16, and the inner guide roller 29 contacts the inner peripheral surface 16c thereof.
The outer guide roller 30 is separated from the inner peripheral surface 15c of the perfect circle ring 15.

Two circular grooves 15d and 16d are formed on the circular ring 15 and the eccentric ring 16 of each guide ring 3, respectively.
When the guide ring 3 is rotated 180 °, these groove 1
5d and 16d engage the fixed roller 20 or the moving roller 27 to stop the reversing drum 2 in a stable state. In addition, the fixing holes 3a, 3 are provided at the two lower parts of the guide ring.
b is formed, and the reversing drum 2 can be fixed at an oblique position by engaging the tip of a positioning rod 31 provided on the base 1 so as to be vertically movable with the fixing holes 3a, 3b.

Next, the structure of the roller moving mechanism 23 will be described with reference to FIGS. 4 and 5. A shaft 34 is rotatably supported by brackets 32 and 33 provided on both left and right sides of the base 1, and a base portion 35a of a switching lever 35 is fixed to one end of the shaft 34 by a fixing pin 36. Furthermore, the center of a diamond-shaped arm 37 is fixed to both ends of the shaft 34, and the other end of a link 39 whose one end is pivotally supported by a pin 38 is pivotally supported by the slide base 24 by a pin 40. . As a result, the switching lever 35 stops
Both slide bases 24 are retracted in the direction of arrow A when they are in contact with the solid line 41, and both slide bases 24 are advanced in the direction of arrow B when the switching lever 35 is swung to the position of the chain line in contact with the stopper 42. It is supposed to do.

In the figure, 43 is a lock pin of the switching lever 35, and 44 is a tilting prevention lever for preventing the switching lever 35 from tilting outward.

Next, the operation of the embodiment of the present invention having the above configuration will be described.

When reversing the small workpiece W ₁ heights, first supplies on the work receiving table 6 for reversing drum 2 the workpiece W ₁ from input conveyor C _1. Next, attach the work clamp 10 to the long hole of the mounting plate 9.
It is lowered along 9a to abut and fix it on the upper surface of the work W ₁ , and the stopper 13 is rotated to abut both front and rear end surfaces of the work W ₁ . At this time, the switching lever 35 of the roller moving mechanism 23 is at the position indicated by the solid line, both slide bases 24 are retracted, and the outer peripheral surface 15a of the perfect circular ring 15 of the reversing drum 2 is moved.
The fixed roller 20 and the outer guide roller 30 are in contact with the inner peripheral surface 15c. When the reversing drum 2 is rotated by a driving mechanism (not shown) or manually from this state, the reversing drum 2 is rotated by 180 ° while the perfect circular ring 15 is supported by the fixed roller 20, and the perfect circular ring 15 is formed. It stops at the position where the fixed roller 20 is engaged with the groove 15d. In this manner, when the reversal of the workpiece W ₁ has been completed, the workpiece W ₁ which has been released the engagement by the work holding 10 and the stopper 13
Is discharged to the carry-out conveyor W ₂ .

On the other hand, when reversing the large workpiece W ₂ of the height after the workpiece W ₂ was fed into the reversing drum 2 and fixed with the work holding 10 in the same manner as described stopper 13, the roller moving mechanism
The switching lever 35 of 23 is swung to the position indicated by the chain line. Then, the arm 37 and the link rotated by the switching lever 35.
The slide base 24 moves forward via 39, and the moving roller 27 and the inner guide roller 29 contact the outer peripheral surface 16a and the inner peripheral surface 16c of the eccentric ring 16, respectively. Outer guide roller 30 at the same time
Also moves with the sillard base 24, and separates from the inner peripheral surface 15c of the perfect circle ring 15 that has been in contact with the sill. From this state, the reversing drum 2 rotates 180 ° while the eccentric ring 16 is supported by the moving roller 27, and stops at the position where the moving roller 27 engages with the groove 16d formed in the eccentric ring 16. At this time, the reversing drum 2 is raised by the amount of eccentricity of the eccentric ring 16, so that the fixed roller 20 is separated from the perfect circle ring 15. When the reversal of the work W ₂ is completed in this way, the height difference between the work W and the work 1 is absorbed by the rise of the reversing drum 2, and the position of the bottom surface of the work W _{2 is at} the bottom of the carry-out conveyor C ₂ . It automatically matches the transport level L. As a result, the work W ₂ is smoothly discharged from the reversing drum 2 to the carry-out conveyor C ₂ .

Although the embodiments of the present invention have been described in detail above, the present invention is not limited to the above embodiments, and various small designs can be made without departing from the present invention described in the scope of claims for utility model registration. It is possible to make changes.

For example, instead of configuring the roller moving mechanism 23 with a link mechanism as in the embodiment, it is possible to use another mechanism such as a cylinder.

C. Effect of the Invention According to the work reversing device of the present invention described above, the reversing drum is provided with the perfect circle ring and the eccentric ring, and the perfect circle ring is supported by the fixed roller according to the height of the work, or Since the reversing drum is rotated while the eccentric ring is supported by the moving roller, the position can be always maintained at a constant height on the bottom surface of the work after reversal regardless of the height of the work. This makes it possible to smoothly perform the work of discharging the inverted work from the reverse drum to the carry-out conveyor.

[Brief description of drawings]

FIG. 1 is a front view of a work reversing device according to an embodiment of the present invention, FIG. 2 is a view taken in the direction of arrow II in FIG. 1, and FIG. 3 is III-III in FIG.
FIG. 4 is a side view taken along the line, FIG. 4 is a sectional view taken along line IV-IV in FIG. 2, and FIG. 5 is an enlarged view of a switching lever portion. W ₁ , W ₂ …… Workpiece 2 …… Inversion drum, 3 …… Guide ring, 15 …… Circular ring, 15 a …… Outer peripheral surface, 16 …… Eccentric ring, 16 a …… Outer peripheral surface, 20 …… Fixed roller , 23 …… Roller drive mechanism, 27 ……
Moving roller

Claims (1)

[Scope of utility model registration request] 1. A reversing drum (2) having a pair of guide rings (3) at both ends, and an abutting outer peripheral surface of the guide ring (3) so that the reversing drum (2) is rotatable around its axis. And a roller for supporting the work, and the work (W ₁ , W ₂ ) supplied into the reversing drum (2) is rotated 180 ° together with the reversing drum (2) and then discharged in a vertically inverted posture. In the device, the guide ring (3) has a circular true circular ring (15) and a lower half portion thereof overlap the true circular ring (15), and an upper half portion thereof bulges outward from the true circular ring (15). A reversing drum (2) composed of an eccentric ring (16) and a fixed roller (20) capable of contacting the roller with the outer peripheral surface (15a) of the perfect circle ring (15) and a roller moving mechanism (23). Moves in the axial direction of the eccentric ring (16) to the outer peripheral surface (1 A work reversing device comprising a moving roller (27) capable of contacting 6a).