JPS6355016A - Packer for hollow cylindrical body - Google Patents

Abstract

(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is useful for wrapping a hollow cylindrical product, such as a metal coil wound up from a rolled thin plate, with paper. This invention relates to a device for folding paper covering a hollow cylinder along the end face thereof.

[Conventional technology]

After the rolled thin plate is wound into a coil, the entire coil is generally wrapped in paper in order to be shipped as a product. Since this metal coil is wrapped in a hollow cylindrical shape, the outer circumferential surface and both end surfaces are wrapped with the same paper, and the inner circumferential surface is wrapped with separate wrapping paper. It is necessary to perform work on equipment.

In packaging such metal coils, since the outer circumferential surface and the end surface of the cylindrical body are packed with the same paper, one of the challenges is to quickly and appropriately fold the paper on the end surface. As a device for performing this folding, for example, Japanese Patent Application Laid-Open No. 57-683
There are those described in Japanese Patent Publication No. 15 and Japanese Patent Publication No. 55-3212.

The device described in the former publication has a plurality of approximately triangular holding plates arranged at intervals in the circumferential direction of the metal coil, and the holding plates are movable in the direction of the end face of the coil and can also be rotated in the circumferential direction of the coil. It has a structure like this. In the packaging process, the folds protruding from the end face of the coil are pressed and bent by moving the presser plate in the direction of the coil, and then the paper that comes out from the gap between each mold plate is rotated circumferentially through the presser plate. Sazeru. By this operation, the paper is folded in the direction along the end face of the metal coil, and the folding can be performed by the operation of the pressing plate.

In addition, the device described in the latter publication has a pair of folding tools arranged radially and concentrically with respect to the end face of a metal coil, and the two bars are arranged in a triangular shape with respect to the end face of the coil. It has a structure that allows it to be transformed into. In the packaging process, the ends of the paper are pressed and bent against the end face of the coil with the two rods closed and straight, and then the rods are opened to form a triangular shape to create multiple pleats. . Then, the metal coil is rotated relative to the folding tool to perform pleat folding.

[Problem that the invention seeks to solve]

By the way, the folding required when wrapping the periphery of a cylindrical body such as a metal coil with paper or the like cannot be ignored in order to be shipped as a final product. One factor that determines the finish of the pleats is the tension in each direction that acts on the paper at the time of the pleats. In other words, the radial tension that acts toward the center of the metal coil when the metal coil is bent from the outer periphery along the end face, and the circumferential tension that compensates for the slack in the circumferential direction of the paper that occurs during this bending. If properly maintained,
This results in an optimal finish.

However, the conventional equipment does not have the necessary structure to maintain the tension of the wire, so it has not been possible to perform the work satisfactorily. For this reason, depending on the quality of the paper, such as hard paper or vinyl paper, there is a problem in that manual finishing is required after folding, and work must be done to obtain an appropriate appearance as a final product.

Therefore, the purpose of the present invention is to maintain the tension in each direction that should be applied to the wrapping for packaging during the folding process, thereby improving the finished condition of the folds after packaging and preventing a decrease in product value. do.

[Means for solving problems]

In order to achieve the above object, the present invention provides a widthwise edge of a wrapping paper that is movable in the same direction as the axis of the hollow cylinder and covers the outer peripheral surface and end surface of the hollow cylinder. A plurality of gripping mechanisms are arranged in a ring, the wrapping paper gripping points of the gripping mechanisms are rotatable while drawing a circular locus of a constant radius around the edge in the width direction of the hollow cylinder, and the wrapping paper The gripping point is characterized in that it is rotatable around the trajectory.

〔Example〕

Hereinafter, the present invention will be specifically described based on embodiments shown in the drawings.

Fig. 2 is a vertical sectional view showing the packaging device according to the present invention;
The figure is a sectional view taken along the line 1 to T in FIG. 1.

In the figure, a paper folding device A and its auxiliary device B are arranged so as to be orthogonal to the path line of the metal coil C. These folding devices A and auxiliary devices B are arranged as a pair on the left and right with the pass line in between, and can each run on rails D laid on the work floor surface.

In the folding device A, a cylindrical drum frame 2 having an axis perpendicular to the pass line of a metal coil C is fixed to a trolley 1 running on a rail D, and a metal coil is attached to the center of the drum frame 2 to hold the folded edge of the metal coil. An insertion frame 3 to be inserted into the inner hole H of C is coaxially fixed to the drum frame 2 by ribs 4.

Note that as a drive source for the trolley 1, an electric RF provided at the lower part of the trolley 1 may be used, and the wheels may be gear-shaped and the rails D may have racks.

Between the drum frame 2 and the insertion frame 3, a plurality of (16 in this example) guide rods 5 are arranged radially at two positions along the axis, and screw shafts 6 are arranged radially in the same way. It is set up. Then, the screw shaft 6 is positioned so as to be included within the plane formed by the two guide rods 1'5,
Two radially arranged guide lofts 5 and screw shafts 6
A lifting block 7 is attached to the.

The upper and lower ends of the screw shaft 6 are rotatably supported by the drum frame 1 and the insertion frame via bearings, respectively,
The lifting/lowering block 7, which is rotatably driven by an externally provided electric motor 2a, is slidably supported at two points sandwiching the screw shaft 6 by the guide iron 5, and has a structure in which it is screwed into the screw shaft 6. , can freely move in the radial direction as the screw shaft 6 rotates.

r;'A A gripping mechanism E is attached to the tip of the lowering block 7 to grip the paper wrapping the metal coil C. By synchronizing each lifting block 7 and changing the radial position of the drum frame 1, the metal coil It has a structure that allows it to grip paper according to the outer diameter of C. FIG. 3 is an enlarged sectional view showing the interior of the gripping structure E and the insertion frame 3, and will be described in detail below.

The gripping mechanism E includes a hollow arm 8 fixed to the tip of an elevating block 7 so as to have an axis parallel to the axis of the drum frame 1, a slide cylinder 9 and a row reactuator 1.
The gripping device 11 is connected via 0. Inside the hollow arm 8 is an electric motor 8a.

A slide cylinder 9 is provided on a rotating arm 12 that includes a speed reducer 8b and a bevel gear 8C, and a bevel gear 9a that meshes with the bevel gear 8C. The slide cylinder 9 is slidable on a slide shaft 13 provided on a rotating arm 12 and has a low reactor actuator 10 integrated therein. This low reactuator IO is of a type that has a rotating shaft parallel to the slide shaft 13, and a bearing 14a that rotatably supports the gripping device 11.

14b.

FIGS. 4A and 4B are a vertical sectional view and a plan view showing details of the gripping device 11. In the figure, the head block 15 is moved in the thrust direction by a bearing 14a integrated in the low reactor unique 10. A cylinder tube 16 that is restrained and rotatably supported and is threadedly engaged with the head block 15 is supported by the other bearing 14b.The cylinder tube 16 has a circumferential surface that transmits the rotation of the low reactor actuator 0. A timing belt 10a is wound around the timing belt 10a, and a shock absorbing spring 16b is disposed between a collar portion 16a formed on the circumferential surface and a bearing 14b.

On the other hand, a port 7 connected to the compressed air circuit is formed in the head block 15 to enable supply and discharge of compressed air to and from the cylinder tube 16.
A piston 18 movable to the left at 1 is disposed within the cylinder tube 16.

An actuation block 19 is fixed to the tip of the cylinder tube 16, and a compression coil spring 20 is interposed between the actuation block 19 and the piston 18. Further, a connecting loft 21 is fixed to the piston 18 along its movement axis, and the distal end side of the connecting rod 21 is slidably supported by the actuating block 19. When compressed air is supplied to the cylinder tube 16, the piston 18 The connecting loft 21 moves in the distal direction against the biasing force of the compression coil spring 20.

Furthermore, a fixing claw 22 that contacts the surface of the packaging paper is connected to the tip of the operating block 21 in a substantially horizontal direction.
A movable claw 23 that is paired with 2 and receives the back side of the packaging paper is linked to the connecting rod 21 24, 25 and the operating block 19.
It is connected via an arm 26 which is pivotally connected to. Fixed claw 2
A paper winding lever 27 is pivotally mounted on the upper surface of the paper winding lever 27 as shown in FIG. be done. Note that a protrusion 30 and a recess 31 are provided on opposing surfaces of the fixed claw 22 and the movable claw 23, respectively, so that the protrusion 30 is sunk into the recess 31 when both the claws 22 and 23 are overlapped.

The gripping mechanism E having the above configuration operates by driving the electric motor 8a in the hollow arm 8, thereby controlling the bevel gears 8b, 8.
The rotary arm rotates clockwise in FIG. 4 via c. Furthermore, when the low reactuator 10 is moved, the cylinder tube 16 rotates around its axis due to the timing lever t-10a.

Furthermore, when compressed air is supplied from port 7, piston 1
8 is pushed to the left, and the connecting loft 21 integrated with the piston 18 moves toward the actuating block 19. The linear movement of this connecting block 19 is caused by the link 24.2.
5 and the arm 26, the cough arm 26 is rotated about the pivot point of the cough arm 26, and as a result, the movable claw 23 is rotated as shown in FIG.
Rotate clockwise at l.

Note that the position of the movable claw 23 in the axial direction can be changed arbitrarily by operating the slide cylinder 9.

Next, the structure of the insertion frame 3 will be explained with reference to FIG.

A cylindrical movable sleeve 35 movable in the axial direction is disposed within the insertion frame 3, and the movable sleeve 3
A pushing head 36 for fitting the paper end into the inner hole H of the metal coil C is integrated at the tip of the metal coil C. A concave groove 3a is provided in the inner wall of the insertion frame 3 in the axial direction, and a protrusion 37 protruding from the circumferential surface of the movable sleeve 35 is arranged to sink into the concave 83a, thereby preventing movement of the movable sleeve 35. I'm guiding you.

A partition wall 38 is provided inside the movable sleeve 35, and a cylinder rod 41 of a cylinder 40 is connected to one surface of the partition wall 38 via a universal joint 39. And cylinder 40
The proximal end of the movable sleeve 35 is connected to a flange 42 fixed to the rib 4, and by driving the cylinder 40, the movable sleeve 35 moves forward and backward in its axial direction.

In addition, the push-in head 36 is divided into a plurality of pieces 36a in order to accommodate changes in the diameter of the inner hole H of the metal coil C, and a cylinder 36b whose envelope surface diameter is variable by these pieces 36a is connected to a partition wall. It is fixed to the other side of 38. A parallel link 39 is provided between the cylinder 36b and the piece 36a, and the piece 36a is moved in the radial direction by retraction of the cylinder rod 36c.

In the insertion frame 3 equipped with the movable sleeve 35 and the pushing head 36 described above, the cylinder 40 is operated to move the movable sleeve 35 in order to push the end of the paper into the inner hole H after the paper folding operation. Note that changes in the diameter of the inner hole H can be easily accommodated by setting the diameter of the envelope surface formed by the repiece 36a on the cylinder 36b.

Further, the auxiliary device will be explained with reference to FIG.

As shown in the figure, a first frame 51 having the same shape as the drum frame 1 of the paper folding device A is formed into a cylindrical shape and is fixed to a trolley 50 that is driven by an electric motor G, and a second frame 52 is coaxially mounted in the center. It is fixed by ribs 53 so that it is on the top. 1st. A guide rod 54 is installed between the second frames 51 and 52 at two positions in the axial direction of the folding device A.
As in the above case, 16 guide rods are arranged radially, and the threaded shaft 55 is provided so as to be included in the plane formed by the guide rods 54 in the two positions. The upper and lower ends of this screw shaft 55 are the first and second ends. It is rotatably supported by a second frame 51, 52 by a bearing, and is rotationally driven by an electric motor 56 provided outside. In addition, a paper-covering arm 57 that is slidably guided by two guide rods 54 is screwed onto a screw shaft 55, and the radial position of the paper-covering arm 57 can be freely adjusted by rotating the screw shaft 55. It can be changed. The length of the binding arm 57 in the axial direction is set so that the paper folding device A is inserted in the axial direction and reaches the end of the paper wrapping the metal coil C. In addition, in order to allow this girder arm 57 to pass through the girder folding device A, the arrangement positions of the guide rods 54 and screw shafts 55 are arranged in the circumferential direction of each guide loft 5 and screw shaft 6 of the girder folding device A. It should correspond to the gap between .

The wrapping operation of the end face portion of the metal coil C using the wrapping apparatus having the above configuration will be explained with reference to FIG.

In Fig. 5, the outer diameter of the metal coil C is shown.

The inner hole H has a diameter of d and an axial length of L, and is covered with a wrapping paper P having a width dimension of ct-width of this metal coil. Note that when the end of the wrapping paper P is folded and the amount that the end enters into the inner hole H is ε, then M=L+ (lA(D
d) +ε).

First, a wrapping paper P having a width of M is wound around the outer peripheral surface of a metal coil C and is set on a stand S which can be raised and lowered.

At this time, the folding device A and the auxiliary device B are retracted to a position away from the pass line. Next, metal coil C
The receiver shifts the stand S in the vertical direction and performs center alignment so that the center of the paper aligns with the axes of the drum frame 1 and the first frame 51 of the paper folding device A and the auxiliary device B, respectively.

After the above pre-operation, by operating the electric motor 56 of the auxiliary device B, the screw shaft 55 is rotationally driven, and each paper tensioning arm 57 is moved toward the center, so that the outer circumferential surface of the tip of each paper tensioning arm 57 is The diameter of the envelope to be drawn is set to the minimum state. In this state, the cart 50 is moved in the pass line direction to pass the girder arm 57 in the axial direction of the girder folding device A, and from the end of the wrapping paper P 1 (=x (D d) +ε
) The movement of the cart 50 is stopped when the tip of the girder arm 57 is positioned inside the position.

Next, the screw shaft 55 is reversely rotated by the electric motor 56,
Each papering arm 57 is gradually moved toward the first frame 51. By this movement, each paper tensioning arm 57
The diameter of the envelope drawn by the metal coil C gradually expands, and it finally comes to engage with the back surface of the wrapping paper P protruding from the end surface of the metal coil C. At this point, when the drive of the electric motor 56 is stopped, tension is applied to the wrapping paper P so that the portion in contact with the paper tensioning arm 57 bulges outward, and the wrapping paper P is moved in the axial direction of the metal coil C. When viewed from above, it becomes a median hexagon with a number equal to the number of Gibari arms 57.

After the wrapping paper P is expanded in the radial direction by the auxiliary device B, the position of the fixed claw 22 of the folding device A is set so that one side of the median hexagon of the wrapping paper P can be gripped. This position setting is performed by driving the electric motor 8!2a and rotating the screw shaft 6 to move the lifting block 7 up and down. After that, the cart 1 of the folding device A is moved in the direction of the pass line,
The movement of the cart 1 is stopped at a position where the end of the wrapping paper P can be held between the fixed claw 22 and the movable claw 23 of the gripping device 11.

Next, as shown in the upper half of FIG. 5, when the fixed claw 22 and the movable claw 23 have finished pinching the end of the wrapping paper P, the auxiliary device B is retracted away from the pass line. . As described above, when the fixed claw 22 and the movable claw 23 grip the wrapping paper P, when compressed air is supplied from the boat 17, the piston 18 in the cylinder tube 16 moves, and in conjunction with this movement, the link 24. This can be done by rotating the movable claw 23 toward the fixed claw 22 via 25 or the like.

After the above-described gripping process of the wrapping paper P, the work of bending it toward the end face side of the metal coil C is performed by a combined movement of the rotational movement of the gripping device 11 and the movement of the cart 1, and by the operation of the row reactor 10. Twist the wrapping paper P. That is, the rotation of the rotating arm 12 by the electric motor 8a and the horizontal movement of the trolley 1 by the electric motor F are such that the locus of the gripping point of the wrapping paper P by the gripping device 11 is a circle of radius l centered on the edge X of the metal coil C. Operate as if drawing. Note that when the wrapping paper P is completely folded, the insertion distance ε located closer to the center than the edge Y of the inner hole H is in an upright state. At this time, due to the urging force of the compression coil spring 20 built into the cylinder tube 16, the wrapping paper P comes to receive tension in the radial direction of the metal coil C, and the wrapping paper P is continuously applied from the start to the end of folding. Metal coil C can maintain a state in which tension is applied in the radial direction.

At the same time as this bending process, the low reactor 1
0, the timing belt 10a imparts rotation to the cylinder tube 16 about its axis.

This rotation causes the winding lever 2 provided on the fixed claw 22 to
Wrapping paper P gradually becomes wrapped around 7. The winding lever 27 is deformed by the compression coil spring 28 and the link 29 from an open state into a donkey shape to a closed state as the bending angle increases. By operating the winding lever 27 in this manner, it becomes possible to fold the bag while creating folds, and also to wrap the bag while applying tension in the circumferential direction. In addition, what is shown in the lower half of FIG. 5 is a state in which the wrapping paper P has been completely folded.

Next, after completing the folding process while creating the folds, the pushing head 36 bends the paper P so that the insertion distance ε follows the inner wall of the inner hole H. This operation is performed by gripping the wrapping paper P with the gripping device 11. In this state, the movable sleeve 35 is moved in the direction of the inner hole H by the cylinder 40,
This is done by expanding the piece 36a of the pushing hand 36 using the cylinder 36b. That is, piece 3
When the piece 6a is moved with its diameter set to a size that allows it to be inserted into the inner hole H, and the cylinder 36b is activated at a predetermined position, the piece 36a expands in the direction of the wall surface of the inner hole H, thereby wrapping the wrapping paper P. Can be folded. In addition, the wrapping paper P is
The protrusions 30 of the fixing claws 22 create radial perforation-like cracks, so even if the piece 36a is pressed and bent, the work can be done without breaking other parts.

As described above, end wrapping of the metal coil C using the wrapping paper P is completed, and at the same time the movable sleeve 35 is returned to its original position, the folding device A is retracted to a position away from the pass line.
Prepare for the next task.

〔Effect of the invention〕

As explained above, in the packaging device for a hollow cylindrical body of the present invention, the plurality of wrapping paper gripping points of the gripping mechanism that grips the end of the wrapping paper are each centered on the end face edge of the packaged object. It moves to the end face of the packaged object while drawing a circle with a constant radius. Therefore, the wrapping paper supported at the gripping point can be bent while constantly applying tension in the radial direction of the wrapped object. At the same time as the gripping point of the gripping mechanism is moved, it is rotated so as to give a twist in the circumferential direction of the wrapping paper. Due to the rotation of the gripping point, the wrapping paper is deformed so as to wrap around a part of the gripping mechanism, and as a result, tension can also be applied to the wrapping paper in the circumferential direction.

Therefore, the wrapping paper can be folded and pleated while simultaneously applying tension in the radial direction and the circumferential direction, and the finish of the folded portion after wrapping is improved.

[Brief explanation of drawings]

FIG. 1 is a schematic longitudinal cross-sectional view of a hollow cylindrical packaging device according to the present invention, and FIG. 2 is a cross-sectional view taken along the line I-■ in FIG.
Figure 3 is an enlarged sectional view of the main parts of the gripping mechanism and insertion frame, Figure 4 (al is a sectional view of the gripping device), Figure 4 (b
1 is a plan view of the same, and FIG. 5 is a schematic diagram showing the folding of the wrapping paper to the end face of the metal coil.

Claims (1)

[Claims] 1. A plurality of gripping mechanisms that are movable in the same direction as the axis of the hollow cylindrical body and that attach and detach the widthwise edge of the wrapping paper that covers the outer peripheral surface and end surface of the hollow cylindrical body are arranged in a ring shape, and the gripping mechanism The wrapping paper gripping point of the mechanism is rotatable while drawing a circular locus of a constant radius centered on the edge in the width direction of the hollow cylindrical body,
Furthermore, the packaging device for a hollow cylindrical body is characterized in that the wrapping paper gripping point is rotatable about the trajectory.