JPH0159164B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a wrapping paper mounting device for metal coils.

(Prior art) Various proposals have been made regarding the automation of packaging of metal coils.
It has been proposed to hold a coil on a horizontal support shaft, wrap a winding shaft wrapped in wrapping paper around the coil once, and then wrap the outer periphery of the coil with the unwound wrapping paper.

By the way, metal coils are heavy items, and there is a particularly strong demand for the shipment of coils with wide widths and large unit weights as a recent trend. Therefore, it is difficult to wrap metal coils of wide width and large unit weight manually, and automation of this process is desired.

(Problems to be Solved by the Invention) The present invention places a metal coil on a cradle roll, rotates the metal coil by rotation of the cradle roll, and allows the outer paper to be placed on the metal coil without any trouble. To provide a wrapping paper mounting device that can be mounted on a metal coil without being twisted.

(Means and effects for solving the problem) The present invention provides a pair of cradle rolls which have a drive system and can rotate with the metal coil to be packed placed thereon, and the metal coil to be packed placed on the cradle rolls. A pair of base arms is provided at a position apart from both end faces of the base arm so as to be movable up and down and rotatable, and each base arm is provided with a rotatable center block, and each center block has a length. Adjustable sliding bars are provided, and a pressure regulator is embedded in the tip of each sliding bar in the axial direction of the hollow cylindrical roll to removably grip the winding roll that attracts the edges of the wrapping paper. A pair of multi-jointed support arms capable of vertical and horizontal movement are provided which are rotatable and have a variable radius of rotation, and a paper clamp mechanism is further provided at the tip of the arms. This is a wrapping paper mounting device for metal coils.

Wrapping the outer periphery of a heavy metal coil with paper requires expensive equipment to suspend the coil, and it is extremely difficult to wrap it manually on the ground. The present inventors have studied a method of attaching the outer circumferential paper, in which the metal coil is a cylindrical body, is placed on a rotating body, and utilizes the rotation of the metal coil.

That is, when two parallel cradle rolls are rotatably provided, metal coils are placed thereon, and the cradle rolls are rotated in the same direction, the metal coils rotate in the same direction on the cradle rolls. Therefore, if the wrapping paper is guided between the metal coil and the cradle roll, the wrapping paper can be passed between the coil and the cradle roll without being damaged. Moreover, since the cradle roll and the metal coil are in line contact with each other, the wrapping paper will not be damaged regardless of the weight of the metal coil.

In order to attach the above-mentioned wrapping paper, the present invention uses wrapping paper cut to the length required for metal coil packaging.
The wrapping paper is wrapped in advance on a wrapping roll, the wrapping roll is brought into contact with a metal coil, and the wrapping paper is unwound while being attached.

Furthermore, when adhesive is applied to the edges of the wrapping paper in advance, the leading and trailing edges of the wrapping paper can be glued together at the same time as the wrapping paper is attached.

The present invention provides an arm that grips both ends of wrapping paper.
Since the coil rotates around the central axis and serves as a guide for attaching the wrapping paper, a tensile force acts on the inside of the wrapping paper.
By utilizing this tensile force to adhere the leading and trailing ends of the wrapping paper, it is possible to omit the pedestal.

The present invention will be explained below with reference to the drawings.

Wrapping paper stock roll 17- in the present invention
1 and 17-2 are horizontal shafts 15 mounted on the frame 14;
established in 12 is a snubber roll, and 16 is a pinch roll. The wrapping paper preparation mechanism of the present invention includes:
It is composed of the stock roll and a roll exchange body.

The roll exchange main body 20, as shown in FIG.
A rotating body 11 is provided on the horizontal shaft 6. The rectangular rotating body 11 is provided with shears 3-1 and 3-2, and a pair of shears 3-1 and 3-2 are provided at the corners of the upper and lower edges of the rotating body 11 and are slidable in the axial direction.

On both sides of the rotating body 11 of the present invention, arms 9-
1, 9-2 are fixed, and openable roll clamps 7-1, 7-2 and 7-3, 7- are fixed at both ends of the arm.
4 is provided. Openable roll clamp 7
is pivotally supported on the arm by a pin 10, and the winding roll 2
Designed to grip the ends of 6. Therefore, roll clamps 7-1, 7-2 and 7-3, 7-4
are located symmetrically with each other, and their positions can be changed alternately by rotating the horizontal axis 6 by 180°.

According to experiments, stock crawl 17-1,17
It has been experienced that since the wrapping paper is stocked at -2, curls remain in the wrapping paper, which causes irregularities in the paper when it is wound up on the winding roll via the pinch roll 16. For this reason, a paper feeding device is preferably provided between the pinch roll 16 and the winding roll 26.

The paper feeding device 50 of the present invention has a plurality of rolls 53 on a shaft 52, as shown in FIGS. 4 and 6, and there is a gap 1 between the rolls. Roll groups 51-1 and 51-2 having a plurality of rolls 53 on the same axis
constitutes a pinch roll 16 and is given the rotation indicated by the arrow.

The sheet gripping bar 55 has comb teeth 57 having a width t that can be freely inserted into the roll interval 1, and the bars 55-1 and 55-2 are provided so as to be able to abut each other. The sheet gripping bar 55 is disposed with comb teeth 57 fitted between the rolls of the pinch rolls 51, and is movable up and down by a shaft 56 suspended by a guide (not shown), for example, a chain. Also, the sheet gripping bar body is given a length d, but
Although the bars 55-1 and 55-2 are formed with different heights d, this is not particularly limited.

That is, the wrapping paper 5 has a bend due to the coiled stock, but as shown in FIG. 7a, it is first held by a pinch roll 51 and then captured by a sheet gripping bar. The pinch rolls 51 are given a roll interval 1, and comb teeth 57 having a width t are located at the interval 1, and the comb teeth 57 can abut each other and are suitable for gripping wrapping paper.

When the wrapping paper 5 is grabbed between the bars 55, the seventh
As shown in FIG.
The wrapping paper 5 is attracted to the winding roll 26 from the gripping bar 55 when approaching the body of the wrapping paper 5 . This is advantageous in that the edge of the wrapping paper is attracted to the winding roll by providing a difference in length d between the gripping bars 55-1 and 55-2.

As described above, the wrapping roll of the present invention waits in the roll exchange main body after wrapping the wrapping paper supplied from the pinch roll to a desired length, is gripped by the rotating mechanism, and is brought into contact with the metal coil. The wrapped wrapping paper is unrolled and the wrapping operation is started. The wrapping work is completed by rolling the winding roll on the coil surface and adhering the leading end of the wrapping paper to the rear end of the wrapping paper of the winding roll.

By the way, since an adhesive piece coated with adhesive is provided at the leading end of the wrapping paper, the winding roll of the wrapping paper is equipped with a pressure regulator to attract the leading end of the wrapping paper guided from the paper supply device. It is desirable that the wrapped second wrapping paper does not come into contact with the adhesive.

That is, the winding roll 26 of the present invention is shown in FIGS.
As shown in Figure 0, a hollow cylindrical roll body 71
A groove 77 is bored in the roll axis direction. The groove is U-shaped, but is not particularly limited. The groove 77 is
For example, a depth d ₀ is given to which the vacuum box 72 can be raised and lowered.

The vacuum box 72 has one side formed in an arc shape, preferably having the same curvature R as the roll body 71, and a desired number of small holes 82 are provided in the arc. This is convenient when the wrapping paper 5 is fed into the arc of the vacuum box under reduced pressure. Further, the vacuum box 72 is loosely fitted into the groove 77 and can be moved up and down.

The roll body 71 has side plates 83-1 and 83-2, a cylinder 76 is provided on the side plate 83-1, and a bar 75 is horizontally installed in the hollow of the roll body. One end of the bar 75 is connected to the cylinder 76, and the other end is connected to the support plate 8.
1, and can reciprocate horizontally by driving a cylinder 76.

The vacuum box 72 is provided with a base 78 , and the link 74 is loosely attached 79 to the base 78 .
The other end is loosely attached 80 to the bar 75. Further, the link 74 is pivotally connected at the center to pedestals 85-1 and 85-2 by a fulcrum pin 73. That is, the horizontal reciprocating motion of the bar 75 is converted to obtain the vertical movement of the vacuum box 72, but for this purpose, the link 74 has an elongated hole 84-1,
84-2 is preferably provided.

That is, the wrapping paper is supplied at the raised position of the vacuum box, and with the wrapping paper having a sliding surface on the outer surface of the paper end 5-2, the wrapping paper is adsorbed by the reduced pressure of the vacuum box, and winding of the wrapping paper is started. However, when the wrapping paper reaches its second roll, the cylinder is activated to lower the vacuum box into the groove. The vacuum box is
Since the wrapping paper is stored in the depth d ₀ of the groove using the elongated hole as a guide by the link, the wrapping paper for the second round is placed at the paper edge 5-
The work is completed by winding up the wrapping paper to a desired length without directly touching the adhesive of Step 2.

As shown in FIG. 1, the cradle rolls 25-1 and 25-2 are provided on a base so as to place the metal coil C, are connected to a drive system (not shown), and are rotationally driven in the same direction. Rotate the metal coil C.

For the winding roll 26, a desired wrapping paper is prepared in a roll exchange main body 20 provided in a wrapping paper preparation device, and the wrapping paper is brought into contact with a metal coil C by a turning mechanism 30 to prepare for winding.

The winding roll turning mechanism 30 of the present invention is
As shown in the figure. The wrapping roll 26 is attached to the roll clamp 3
1-1 and 31-2, the roll clamp is pivotally supported by the sliding bar 32 with a pin 37, and rotated by an actuator (not shown). The sliding bar 32 is attached to the pivot center block 33 via a bush 38. A rack 36 is mounted on the sliding bar 32, and the rack 36 meshes with a pinion 39, and the pivoting center block 33
Reciprocating operation is possible through rotation of the pinion 39 by a drive mounted above (not shown).

The rotation center block 33 has a bearing 1 on the base arm 34.
The base arm 34 is pivotally supported via the base shaft 17
It is fixed to a base 35 which is fixed to 1.
The rotation is driven by a drive motor 177 installed on a base 175 fixed at the center of the base shaft 171.
The spline shaft 173, which is supported by bearings 181-2 on the base arms 34 on both sides, is rotated.
3 and the sprocket 180 on the pivot center block 33.

When applying the turning mechanism 30 to the turning mechanism 40,
When the ratio of the maximum and minimum outer diameters of the metal coil exceeds 2, the end of the sliding bar 32 opposite to the roll clamp is connected to the winding roll 26 and the cradle roll 25.
There may be cases where it is not possible to hire someone due to the risk of coming into contact with someone else.

For this purpose, the present invention employs a turning mechanism shown in FIGS. 12 and 13.

In the figure, a first arm 143, a second arm 142, and a third arm 141 are each supported by bearings, forming an articulated robot arm having three axes.

The base shaft 171 is the base 35-1 of the turning mechanism 30,
A spline is cut between each of 175 and 35-2, and the first arm 143 is fixed to a base 144 connected to the base shaft 171 by a spline. A base 175 placed at the center of the base shaft 171
A drive motor 176 is installed on the base 35.
-1, spline shaft 172 pivotally supported by 35-2
Rotational force is transmitted to. A sprocket 182 is provided on the spline shaft 172 and is coupled to the base 144 by a thrust bearing 183.

Also, a shaft 145 on the first arm 143 is supported, and the shaft 1
A sprocket 148 is fixed to one end of the arm 45, a sprocket 151 and a brake 149 fixed to the first arm are pivotally supported at the other end, and a clutch 150 is fixedly mounted. A shaft 146 is provided at the tip of the first arm 143 to fix a sprocket 152 and engage with the sprocket 151, and a double sprocket 153 is provided to engage with the sprocket 148. 155
indicates a bearing.

The second arm 142 is connected to the shaft 146, and the third arm 1
41 and a shaft 147. A sprocket 154 is also provided on the shaft 147 and engaged with the double sprocket 153. Therefore, the driving energy of the motor 176 is applied to the spline shaft 17 when opening the clutch 150 and closing the brake 149.
2, sprocket 182, sprocket 148,
Double sprocket 153, sprocket 154,
is transmitted to the third arm 141 via the shaft 147, and θ ₁
is fixed and only θ ₂ changes.

Further, when the clutch 150 is closed and the brake 149 is opened, the driving energy gives a turning motion of the second arm 142 as well as the turning of the third arm described above, and the angle θ ₂ formed by the second arm and the third arm is While keeping it fixed,
A second arm pivots about axis 146.

That is, the turning mechanism of the present invention is capable of simultaneously and selectively turning the second arm and the third arm using one motor.

Another embodiment of the turning mechanism of the present invention is shown in FIGS. 14 and 15.

In the figure, the rotating device includes a first arm 143 provided on a base, a second arm 142 pivotally supported by the first arm, and a third arm 141 pivotally supported by the second arm. The first arm 143 is provided with a motor 104 and a sprocket 105 as a driving source, and as shown in FIG. The rotatably provided bearings 121-1 and 121-2 are composed of one bearing. Although not shown, the motor 104 can be installed on a desired base outside the first arm 143.
Of course you can. The differential gear 107 is a known gear in which gears 113, 114, 115, and 116 are provided in a gear case 117 and mesh with each other. The gear case 117 is coupled to the second arm 142 via the brake rotating portion 110-1. The fixed part 110-2 of the brake is directly connected to the first arm and does not come into contact with the gear case 117.

A shaft 118 is fixed to the gear 116, and the second arm 14 is connected to the shaft 118 via bearings 120-1 and 120-2.
2 is provided. The brake 110 is the first arm 143
The first arm and the second arm can be freely engaged with each other. On the other hand, the gear 113 is fixed to the shaft 112,
having a sprocket 106 at the end of the shaft 112;
The driving energy of the motor 104 is transferred to the differential gear 10.
7 to the shaft 118, but the brake 11
It is selective according to the activation and deactivation of 0.

The second arm 142 and the third arm 143 are supported by a shaft 119, and bearings 122-1 and 122-2 are interposed therebetween. A brake 111 is provided coaxially with the shaft 119, and can be freely engaged with the third brake arm when the brake 111 is activated or stopped. Therefore, sprocket 109 of shaft 119 and sprocket 10 of shaft 118
8, the drive energy of the motor 104 is selectively transmitted to the third arm by operating and stopping the brake 111.

That is, the brake 110 is activated, and the brake 1
When 11 is inactive (free), the first arm and the second arm are fixed, and there is no change in θ ₁ in FIG. 12. Further, the forward rotation of the motor 104 gives the gear 113 a normal rotation, and the gears 114 and 115 rotate following the gear 113, giving the gear 116 a reverse rotation. At this time, gear case 117 does not rotate. gear 116
Since the reverse rotation of gives reverse rotation to the shaft 119, the third
As the arm rotates, θ ₂ changes.

Next, the brake 111 is activated, and the brake 1
When 10 is inactive (free), the second and third arms are fixed and there is no change in θ ₂ . Brake 11
1, the third arm and the second arm are fixed.
Therefore, the relative rotation between the shaft 119 and the second arm is stopped, and the sprocket 108 and the shaft 1 that engage with this are stopped.
18 is also prevented from rotating relative to the second arm.

As shown in FIG. 15, the casing 1 of the differential gear
17 is fixed to the rotating part 110-2 of the brake 110 fixed to the second arm, so the shaft 118
Relative rotation between gear 116 and casing 117 is eliminated. Therefore, the rotation of gears 115 and 116 is stopped, and only the movement of rotation of differential gear 107 as one unit is possible. For this reason, motor 1
The forward rotation of 04 is transmitted to the sprocket 106,
Shaft 112, differential gear 107, brake rotating part 1
10-1 to obtain the normal rotation of the second arm, and the first
The change in the angle θ ₁ between the arm and the second arm is obtained.

A device for changing the width of the winding mechanism is provided in response to changes in the width of the wrapping paper. Base 17 on base shaft 171
A drive motor 178 is installed on the base 35-1, 35-2, and the screw shaft 174 is supported by the drive motor 178.
rotates, and the nut 184 installed on the base 144
The opening and closing operations of the winding mechanism are performed through the winding mechanism.

The wrapping paper gripping mechanism 60 is shown in FIG. The paper clamp 161 is pivotally supported by a pin 163 and is opened and closed by an actuator (not shown) built into the rotary piece 162. The rotating piece 162 is pivotally supported by a pin 164 attached to the tip of the third arm 141 of the rotating device 40, and can be rotated 90 degrees by a rotary actuator (not shown) built into the rotating piece 162. ing.

When clamping the wrapping paper, the wrapping paper before being cut by the shear 3 is horizontal and the third arm 141 is vertical, as shown in FIG. 16a.
The rotating piece 162 is bent at 90 degrees and the paper is clamped.
If the paper winding operation shown in FIGS. 18 and 19 is performed in this state, the clamp 161-2 protrudes from the outer periphery of the metal coil C, so it comes into contact with the winding roll 26 and the cradle roll 25. There is a high risk of damage to the clamp device.

In order to solve this problem, as shown in FIG. 16b, the rotary piece 162 is held in a straight line with respect to the third arm 141 and the paper is bent, so that the tip of the clamp 161 is in the same circle as the outer diameter of the coil. So that it is on the circumference,
This can be achieved by appropriately selecting the angle θ ₂ formed by the second arm and the third arm shown in FIG. 12 and adjusting the effective turning radius.

The base shaft 171 is a pedestal 1 fixed to a pedestal 197.
The sprocket 194 is pivotally supported by a base 191 which is suspended via a chain. The three directions of the front left and right of the metal coil C are the first arm 14
3. The base arm 34 and the first arm 143 are surrounded by the base shaft 171, etc., making it difficult to convey the coil.
It is convenient to swing the base 171 around the base shaft 171 and tilt it upward. For this purpose, a cylinder 192 is installed on the base 191, and a device is provided that rotates the base shaft 171 and swings the first arm 143 and the base arm 34.

Since the metal coil C is placed on the cradle roll 25, when the outer diameter changes, the height of the center of the coil changes. Therefore, in order to align the turning center with the center of the coil, the drive motor 195 is placed on the pedestal 193, and the sprocket 194 is rotated so that the pedestal 19
The height of 1 is changing. By attaching a counterweight 196 to the opposite end of the chain, it is possible to reduce the capacity of the motor.

Although the configuration of the present invention is as described above, the operation will be explained below.

The wrapping paper 5 on the stock roll 17 is wound onto the roll 26-1 via the pinch roll 16. The roll 26-1 is rotatably clamped by a roll clamp 7-1, and a desired length of wrapping paper 5 is provided by a drive source (not shown).

At this time, the roll clamp 7-2 is clamping the roll 26-2 which has become empty after the packaging operation, so the roll exchange main body 20 is rotated 180 degrees to transfer the roll 26-1 to the roll 26-2. Swap the position. As shown in FIG. 3, the wrapping paper 5 is
By exchanging the position of the roll 26-1, the rotating body 11
Roll 26-1 and roll 26- are placed under tension by
The roll 26-1 is stretched between the wrapping paper 5 winding and
Finish position exchange and paper clamp.

Next, the winding roll 26 is fixed by a clamp 31 provided at the tip of the sliding bar of the rotating mechanism 30, and the rotating mechanisms 30 and 40 are brought into contact with the metal coil C after the rotating diameter and center of rotation are aligned. As shown in FIGS. 18 to 19, the cradle roll 25
When the metal coil C is placed on -1, 25-2 and the winding roll 26 comes into contact with it, the wrapping operation of the wrapping paper is started by the turning motion given to the turning mechanism 40. At this time, the winding roll 26 is fixed at the contact position and unwinds the wrapping paper.

When the cradle roll rotates in the direction of the arrow (Fig. 18b) at the same time as the arm of the turning mechanism rotates (Fig. 18a), the wrapping paper is rolled along the outer circumference of the metal coil rotated by the cradle roll. It passes between the roll and the metal coil. That is, the metal coil is rotated by the rotation of the cradle roll, and the rotating arm is rotated at the same time. Also, since the tip of the gripping mechanism 43 is on the same circumference as the outer diameter of the coil, the wrapping paper can be placed on the metal coil. It passes between the metal coil and the cradle roll without having to worry about the location.

Once the wrapping paper has passed through, the rotation of the cradle roll is stopped, and the winding roll is then rotated in the opposite direction along the outer periphery of the coil (Fig. 18C).
Finish the packaging work. For efficiency, the winding roll may be rotated in the opposite direction at the same time as the coil is rotated.
By attaching adhesive tape to the tip of the winding roll side of the wrapping paper in advance, taping can be performed by rotating the winding roll over the wrapping paper that is stretched in the direction of the coil axis. .

That is, according to this embodiment, as shown in FIG. 19, the gripping mechanism 43 applies a tensile force to the inside of the wrapping paper, so that it functions as a pedestal during taping, and the pedestal is not required.

(Effects of the Invention) In the present invention, a metal coil is supported on a cradle roll which is a rotating body, and the metal coil is rotated by the rotation of the cradle roll. When introduced around the outer periphery of the metal coil, it is possible to pass the wrapping paper between the rotating body and the metal coil regardless of the weight of the metal coil, and it plays a major role in automating the packaging of metal coils.

In addition, the gripping mechanisms provided on both sides of the metal coil bend and grip the ends of both sides of the wrapping paper to the inside of the coil, making it unnecessary to use a pedestal for taping the ends of the wrapping paper together, which has a great industrial effect. .

[Brief explanation of drawings]

Fig. 1 is an overall explanatory diagram of the present invention, Fig. 2 is an explanatory diagram of the roll exchange main body of the present invention, Fig. 3 is an explanatory diagram of the operation of Fig. 2, and Fig. 4 is a perspective view of the paper feeding device of the present invention. Figures 5 and 6 are partial explanatory diagrams of Figure 4, and Figure 7.
Figures a, b, and c are explanatory diagrams of the action of Figure 4, Figure 8 is a cross-sectional diagram of the winding roll of the present invention, and Figure 9 is an illustration of the operation of Figure 8.
FIG. 10 is an explanatory diagram of the action of FIG. 8, FIG. 11 is an explanatory diagram of the turning mechanism of the present invention, a is a plan view, b is a front view, and FIG. 12 is an explanatory diagram of the present invention. FIG. 13 is a partial plan view of FIG. 12, FIG. 14 is a partial plan view of another example, and FIG.
The figure is a partially enlarged view of FIG. 14, FIGS. 16 a and b are explanatory views of the gripping mechanism of the present invention, and FIGS. 17, 18 a, b, c, and 19 are explanatory views of the action of the present invention. It is. 5...Wrapping paper, 16...Pinch roll, 20...
...Wrapping paper preparation device, 26... Wrapping roll, 25...
...Cradle roll, 30...Roll rotation device,
40... Wrapping paper winding turning device.

Claims (1)

[Claims] 1 A pair of cradle rolls that have a drive system and can rotate while the metal coil to be packed is placed thereon are provided, and a pair of basic arms are moved up and down at a position away from both end faces of the metal coil to be packed placed on the cradle rolls. In addition, each base arm is provided with a rotatable center block, and each center arm is provided with a sliding bar whose length can be adjusted. A pressure regulator is embedded in the axial direction of the hollow cylindrical roll at the tip of the bar, and a holder is installed to removably hold the winding roll that adsorbs the edges of the wrapping paper. 1. A wrapping paper mounting device for a metal coil, characterized in that a pair of multi-joint support arms are provided that are rotatable and have a variable turning radius, and a paper clamp mechanism is further provided at the tips of the arms.