JP6704313B2 - Trimming device - Google Patents

Description

The present invention relates to a trimming device that cuts a molded product from a resin sheet.

As a line for manufacturing products such as containers that contain food, electrical parts, daily necessities, pharmaceuticals, etc., and lid materials for such containers from resin sheets, the molded products are heated by a molding device on the resin sheets conveyed in a predetermined direction. After molding, a trimming device generally separates the molded product from the resin sheet.

For example, in Patent Document 1, as a trimming device, a cutting device (trimming mechanism) for cutting out a plurality of molded products formed on a resin sheet intermittently conveyed by a cutting die (dies and punches), and one of the cutting devices A guide device (sheet guide mechanism) that is disposed on the side to guide the resin sheet to the cutting device, and a conveying device (feed mechanism) that is disposed on the other side of the cutting device and intermittently carries out the resin sheet after the cutting process. , And a camel bag arranged above each of these devices.

In this trimming device, the cutting device, the guide device, and the transport device are independently configured, the cutting device is fixedly arranged, and the guide device and the transport device are movable by casters. The trimming device can change the arrangement positions of the guide device and the transport device, so that even if the resin sheet is turned over along the camelback without rotating the entire device by 180 degrees, the trimming device can be installed on the cutting device. The resin sheet can be loaded and unloaded.

Japanese Patent No. 2747466

5 and 6 show a general configuration of the transport device. As shown in FIG. 5, the transport device 100 includes a first roller pair 101 that holds one widthwise end of the resin sheet S and a second roller pair 102 that holds the other widthwise end of the resin sheet S. A drive device (motor) 103 that rotationally drives these roller pairs 101 and 102 is provided. Each roller pair 101, 102 includes drive rollers 101a, 102a connected to the drive device 103, chuck rollers 101b, 102b arranged above the drive rollers 101a, 102a, and a support plate 104 for supporting the resin sheet S. And

The drive roller 101a of the first roller pair 101 and the drive roller 102a of the second roller pair 102 are connected via a drive shaft 105. The drive device 103 is connected to the drive shaft 105 via the reduction gear 106, and simultaneously drives the first roller pair 101 and the second roller pair 102 via the drive shaft 105.

The support plate 104 is configured to change its vertical position when cutting the upwardly convex shaped product M (FIG. 5) and when cutting the downwardly convex shaped product M (FIG. 6 ). To be done. That is, for example, when the downwardly convex shaped article M is cut after the upwardly convex shaped article M is cut, the support plate 104 is configured to support the downwardly convex shaped article M or the resin sheet S. The position needs to be changed downwards.

However, since the drive shaft 105 is provided, the movement distance of the support plate 104 for changing the position downward is limited. Therefore, in the conventional trimming device, as shown in FIG. 6, it is possible to cut a downwardly convex shaped product M having a relatively small height dimension, but a height equal to or higher than that of the upwardly convex shape. It was not possible to cut something with dimensions.

Therefore, an object of the present invention is to provide a trimming device capable of cutting a downward convex shaped product having a height dimension equal to or higher than that of the upward convex shaped product from a resin sheet.

The present invention is for solving the above problems, and a cutting device for punching the molded product from a resin sheet in which a plurality of molded products are formed, and a transport device for transporting the resin sheet in a predetermined direction, In the trimming device, the conveying device includes a first roller pair that sandwiches one widthwise end of the resin sheet, a second roller pair that sandwiches the other widthwise end of the resin sheet, and the first roller pair. A first drive device that rotationally drives the roller pair, a second drive device that rotationally drives the second roller pair, and a support plate that supports the resin sheet and that is vertically positionable. ..

According to this structure, the first roller pair and the second roller pair are individually driven by the first driving device and the second driving device, so that the first roller pair and the second roller pair are axially driven. There is no need to connect by members. As a result, the moving distance of the support plate is not limited by the shaft member, and it is possible to cut a downward convex shaped product having a height dimension equal to or higher than that of the upward convex shaped product from the resin sheet. Become.

In the trimming device having the above configuration, it is desirable that the first drive device and the second drive device include a servo motor. By synchronizing the servo motors of the respective drive devices, it becomes possible to accurately convey the resin sheet without causing wrinkles or the like.

ADVANTAGE OF THE INVENTION According to this invention, it becomes possible to cut|disconnect from a resin sheet the downward convex shaped molded article which has the height dimension more than an upward convex shaped molded article.

It is a side view which shows the cutting device and conveyance device of a trimming device. It is a rear view of a 2nd conveyance apparatus. It is a side view which shows the cutting device and conveyance device of a trimming device. It is a rear view of a 2nd conveyance apparatus. It is a rear view which shows the conveyance apparatus in the conventional trimming apparatus. It is a rear view which shows the conveyance apparatus in the conventional trimming apparatus.

Hereinafter, modes for carrying out the present invention will be described with reference to the drawings. 1 to 4 show an embodiment of a trimming device according to the present invention. As shown in FIG. 1, the trimming device 1 mainly includes a cutting device 2 that punches a molded product M from a resin sheet S, and conveying devices 3a and 3b that carry the resin sheet S into and out of the cutting device 2.

As shown in FIG. 1, the cutting device 2 has an upper cutting die 4a as a male die and a lower cutting die 4b as a female die. Each cutting die 4a, 4b has an opening, and the molded product M of the resin sheet S can be inserted into this opening. Each of the cutting dies 4a and 4b is capable of individually punching one row of the molded articles M out of a plurality of (multi-row and double-row) molded articles M formed on the resin sheet S, for example, two rows of molded articles. It may be configured so that the articles M can be individually cut at one time. The molded products M punched out by the cutting dies 4a and 4b are vertically stacked by a stacking device (not shown) and then carried out from the cutting device 2.

As shown in FIGS. 1 and 2, the transfer devices 3 a and 3 b include a first transfer device 3 a provided on the upstream side of the cutting device 2 and a second transfer device 3 b provided on the downstream side of the cutting device 2. .. Each of the transport devices 3a and 3b includes a first roller pair 5 that sandwiches one end of the resin sheet S in the width direction, a second roller pair 6 that sandwiches the other end of the resin sheet S in the width direction, and a first roller pair 6. A first driving device 7 that drives the roller pair 5 and a second driving device 8 that drives the second roller pair 6 are provided (see FIG. 2 ). In addition, each of the transport devices 3a and 3b includes support members 9a and 9b that support the roller pairs 5 and 6 and drive devices 7 and 8, a moving mechanism 10 that moves the support members 9a and 9b, and support members 9a and 9b. A base member 11 that supports 9b and the moving mechanism 10 and a support plate 12 that supports the resin sheet S are provided.

Each of the roller pairs 5 and 6 includes drive rollers 5a and 6a arranged below the resin sheet S, and chuck rollers 5b and 6b arranged above the resin sheet S. Each of the drive rollers 5a and 6a has a diameter larger than that of the chuck rollers 5b and 6b, and has a knurled surface. The chuck rollers 5b and 6b are supported by the air cylinder device 13 provided on the support members 9a and 9b. Accordingly, the chuck rollers 5b and 6b are configured to be able to approach and separate from the drive rollers 5a and 6a in the vertical direction.

Each drive device 7, 8 includes a servo motor. The drive shaft of the servo motor according to the first drive device 7 is connected to the drive roller 5a of the first roller pair 5 via a speed reducer. Similarly, the drive shaft of the servo motor according to the second drive device 8 is connected to the drive roller 6a of the second roller pair 6 via the speed reducer. The support members 9a, 9b are formed with holes (not shown) through which the drive shafts can be inserted. In the present embodiment, the servo motors of the drive devices 7 and 8 drive the roller pairs 5 and 6 by synchronous control. Each servo motor can drive each roller pair 5, 6 with high accuracy by the feedback control (position control) thereof.

The support members 9a and 9b are composed of long plate members. The lower portions of the support members 9a and 9b are supported by the moving mechanism 10, and are configured to be movable along the width direction X (see FIG. 2) of the resin sheet S. The support members 9a and 9b are a first support member 9a that supports the first roller pair 5 and the first drive device 7, and a second support member 9b that supports the second roller pair 6 and the second drive device 8. including. As shown in FIG. 2, each support member 9a, 9b supports each roller pair 5, 6 on one surface (inner surface) and supports each drive device 7, 8 on the other surface (outer surface).

The moving mechanism 10 adjusts the distance between the first roller pair 5 and the second roller pair 6 in the width direction X according to the width of the resin sheet S. The moving mechanism 10 is, for example, a screw mechanism, but is not limited to this. The moving mechanism 10 includes a screw shaft 14 arranged along the horizontal direction, and a handle 15 for operating the screw shaft 14. The screw shaft 14 is rotatably supported by the base member 11. The moving mechanism 10 rotates the screw shaft 14 by manually operating the handle 15 to move the first supporting member 9a and the second supporting member 9b so as to approach and separate from each other. That is, in the screw shaft 14, for example, a portion engaging with the first support member 9a has a right-hand thread, and a portion engaging with the second support member 9b has a left-hand thread.

The base member 11 is a long member having a hollow shape. The base member 11 has a guide rail portion 16 that guides the support members 9a and 9b along the longitudinal direction thereof. As shown in FIG. 1, the guide rail portion 16 is formed in a convex shape and slidably supports a concave portion 9c formed at the lower ends of the support members 9a and 9b. The base member 11 rotatably supports the screw shaft 14 of the moving mechanism 10 via brackets 17 provided at both ends thereof. An elevating mechanism (not shown) is provided below the base member 11. With this lifting device, the transport devices 3a and 3b are configured to be vertically reciprocally movable.

The support plate 12 is composed of a metal plate that is L-shaped in a side view. The support plate 12 has a notch (recess) at the widthwise end so as not to come into contact with the roller pairs 5 and 6. The roller pairs 5 and 6 sandwich the widthwise ends of the resin sheet S at positions corresponding to the notches.

The support plate 12 is supported by the base member 11 via a plurality of support fittings 18. The upper end of the support fitting 18 is fixed to the lower portion (lower surface) of the support plate 12. The support fitting 18 has a plurality of elongated holes 19 formed along the vertical direction. A fixing member 20 such as a bolt can be inserted into each elongated hole 19. The support fitting 18 supports the support plate 12 by screwing and fastening the fixing member 20 inserted into the elongated hole 19 into a screw hole formed in the base member 11. The support fitting 18 is configured to be slidable up and down along the elongated hole 19 in a state where the fixing member 20 is loosened, and the vertical position of the support plate 12 can be changed. The support plate 12 has different vertical positions when cutting the upwardly convex shaped product M (see FIG. 2) and when cutting the downwardly convex shaped product M (see FIG. 4 ). That is, when cutting the downwardly convex molded article M, the support plate 12 is arranged at a lower position than when cutting the upwardly convex molded article M.

Hereinafter, a method of cutting the molded product M by the trimming device 1 having the above configuration will be described. First, with reference to FIG. 1 and FIG. 2, a case where the upward convex molded article M is separated from the resin sheet S will be described.

As shown in FIGS. 1 and 2, the molded product M formed on the resin sheet S is carried into the cutting device 2 while the resin sheet S is sandwiched by the roller pairs 5 and 6 of the respective conveying devices 3a and 3b. To do. When the portion of the molded product M is arranged between the upper cutting die 4a and the lower cutting die 4b, the first conveying device 3a and the second conveying device 3b temporarily stop the conveyance. The trimming device 1 lowers the upper cutting die 4a located above the molded article M, inserts the molded article M into the opening of the upper cutting die 4a, and cuts the molded article M by the respective cutting dies 4a and 4b. To do. The punched molded product M is collected by the stacking device below the cutting device 2.

Next, with reference to FIGS. 3 and 4, the case of cutting the downward convex shaped molded article M will be described. As shown in FIGS. 3 and 4, the molded product M formed on the resin sheet S is arranged in the opening of the lower cutting die 4b, and the lower cutting die 4b and the upper cutting die 4a are engaged with each other and punched. In this example, in order to arrange the downwardly convex shaped molded product M in the opening of the lower cutting die 4b, each of the transport devices 3a and 3b intermittently moves up and down by the lifting device. That is, the conveying devices 3a and 3b alternately repeat the vertical movement of the resin sheet S and the horizontal movement of a predetermined pitch each time the cutting dies 4a and 4b cut the molded product M.

According to the trimming apparatus 1 according to the present embodiment described above, the first roller pair 5 and the second roller pair 6 are individually driven by the first driving device 7 and the second driving device 8, thereby It is not necessary to connect the drive roller 5a of the first roller pair 5 and the drive roller 6a of the second roller pair 6 by a shaft member. As a result, the vertical position change of the support plate 12 is not restricted by the shaft member, and the downward convex shaped product M having a height dimension equal to or higher than that of the upward convex shaped product M can be cut. It will be possible. Further, the diameters of the drive rollers 5a and 6a can be made as small as possible, and the acting inertia moment can be reduced or the cost of the trimming device 1 can be reduced by reducing the number of parts. Further, by configuring each of the driving devices 7 and 8 of each of the transport devices 3a and 3b by the servomotor, the synchronous control thereof does not cause wrinkles or the like on the resin sheet S, and the resin sheet S is accurately transported. It will be possible.

It should be noted that the present invention is not limited to the configurations of the above-described embodiments, and is not limited to the above-described operational effects. The present invention can be variously modified without departing from the scope of the present invention.

In the above embodiment, an example in which the drive devices 7 and 8 of the transport devices 3a and 3b are configured by servo motors has been shown, but the present invention is not limited to this. The driving devices 7 and 8 may be configured by stepping motors.

In the above embodiment, the trimming device 1 including the first transport device 3a and the second transport device 3b is illustrated, but the trimming device 1 is not limited thereto. For example, the trimming device 1 may include only the first transport device 3a.

1 Trimming device 2 Cutting device 3a Conveying device 3b Conveying device 5 First roller pair 6 Second roller pair 7 First drive device 8 Second drive device 12 Support plate

Claims (2)

A trimming device including a cutting device for punching out the molded product from a resin sheet on which a plurality of molded products are formed, and a carrying device for carrying in the resin sheet to the cutting device and carrying out the resin sheet from the cutting device. At
The transport device rotates a first roller pair that sandwiches one widthwise end of the resin sheet, a second roller pair that sandwiches the other widthwise end of the resin sheet, and the first roller pair. A first drive device for driving, a second drive device for rotationally driving the second roller pair, and a vertical position for supporting the resin sheet between the first roller pair and the second roller pair. With changeable support plate ,
The support plate supports the molded product from below when punching the molded product from the resin sheet on which the molded product having a downward convex shape is molded,
It said support plate, trimming and wherein the vertically movable der Rukoto to said first pair of rollers and the second pair of rollers. The trimming device according to claim 1, wherein the first drive device and the second drive device include a servo motor.

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