JPH11894A - Underlay sheet feeder of conveyor type automatic cutting machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To move an underlay sheet synchronously with the movement of a conveyor belt by providing rotatable drums for adding a constant tension in the front and rear of the underlay sheet, and providing an adsorptive pressure variable device for reducing the adsorptive pressure of an adsorptive device in the movement of the conveyor. SOLUTION: A sheet member to be cut 11 is extended in an extending area (a), and carried to a cutting area (b) by the movement of a conveyor to cut it. After the cutting is ended, the resulting member is carried to a pickup area (c) to pick up the cut part. In cutting, an adsorptive device 6 is controlled by an adsorptive pressure various device 7, and operated in high adsorptive pressure state, whereby the sheet member to be cut 11 is highly adsorbed and fixed through an adsorptive hole of an adsorptive table 5, the adsorptive hole of a conveyor belt 1, and a porous material-made underlay sheet 8. In conveyor feeding, the adsorptive device 6 is operated in a low adsorptive pressure state so as to feed the underlay sheet 8 according to the feed of the conveyor belt 1. Thus, the poor productivity as carrying of the underlay sheet from the pickup area to the extending area can be avoided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention has a conveyor device, in which a consumable underlay sheet, which is a consumable, is wound around the upper surface of a conveyor belt, and automatically cuts the cut sheet-like member spread on the upper surface of the underlay sheet. Conveyor-type automatic cutting device, which feeds an underlying sheet in a conveyor-type automatic cutting machine that performs accurate positioning by moving an underlying sheet in synchronization with a conveyor belt when a sheet-like member to be cut is transported by the conveyor device. It concerns the device.

[0002]

2. Description of the Related Art Conventionally, a sheet material to be cut is spread and cut directly on the upper surface of a conveyor belt, or a rectangular underlay having a size of a cutting area is laid on the upper surface of the conveyor belt and cut on the upper surface of the underlay sheet. In some cases, the sheet-like member was expanded and cut. FIG. 3 shows the outline. In the drawing, reference numeral 1 denotes a conveyor belt including a spreading area a, a cutting area b, and a pickup area c, and having a large number of suction holes over its entire length.
Is a drive drum that drives the conveyor belt 1 by frictional action, 3 is a servo motor that drives the drive drum 2 according to a command from a control device, 5 is a suction table that is located in a cutting area b, and has a large number of suction holes on its upper surface. Reference numeral 6 denotes a suction device connected to the side surface of the suction table 5, reference numeral 8 'denotes an underlay sheet which is a porous material, and reference numeral 11 denotes a cut sheet member to be cut. As shown in FIG. 4, a method of wrapping an underlay sheet around an upper surface of a conveyor belt and expanding and cutting a sheet-like member to be cut on the underlay sheet upper surface is also conventionally used. The sheet member to be cut is usually spread out in the extension area, conveyed to the cutting area by a conveyor device, and cut. After the cutting, the conveyor device is again transported to the pickup area, and the cut parts are manually picked up. This series of operations is repeated.

[0003]

When the sheet material to be cut is spread and cut directly on the upper surface of the conveyor belt, the conveyor belt eventually wears out because a blade enters the conveyor belt at the time of cutting. Since the conveyor belt is formed with a large number of suction holes, it is very expensive, and has the disadvantage that it takes time to replace the belt with the conveyor device. In addition, as shown in FIG. 3, when a rectangular underlay sheet is used, the underlay sheet which is treated as a consumable is inexpensive, but after a series of operations from the spreading area to the cutting area to the pickup area, a manual operation is performed. As a result, the underlay sheet had to be transported to the spreading area, resulting in poor productivity.

[0004] The conveyor type automatic cutting machine shown in FIG. 4 has the following disadvantages. That is, as shown in FIG. 5, assuming that the radius of the driving drum + the thickness of the conveyor belt is R and the thickness of the underlying sheet is R, the amount of movement of the conveyor belt per rotation of the conveyor driving drum is 2πR. On the other hand, the amount of advance of the underlay sheet was 2π (R + ΔR), and the sheet could not be sent synchronously, and the cut sheet-like member could not be accurately positioned. SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and has as its object to solve the above-mentioned drawbacks by moving the conveyor belt while the consumable underlay sheet is wound around the conveyor belt. The present invention is to provide an underlay sheet feeding device that automatically moves an underlay sheet in synchronization with the underlay sheet.

[0005]

That is, a means for achieving the object is a conveyor belt having a large number of suction holes over its entire length including an extension area, a cutting area, and a pickup area, and the conveyor belt. A conveyor drive unit for moving the sheet, an underlay sheet of a porous material wound all around the conveyor belt upper surface, an X-axis drive unit for moving the cutter head in all directions in the cutting area, and Y
A shaft driving unit, a cut sheet-shaped member expanded on the underlay sheet facing the cutter head, a suction device for sucking and fixing the cut sheet member on the underlay sheet, and controlling these. In a conveyor type automatic cutting machine equipped with a control unit, a rotatable drum for applying a constant tension is provided before and after the underlay sheet, and a suction pressure variable device for reducing the suction pressure of the suction device when the conveyor moves is provided. It is configured.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIG. 2, the operation of the underlay sheet of a porous material is wrapped all around the top surface of a conveyor belt provided with a large number of suction holes over its entire length. Then, the cut sheet-like member is conveyed into the cutting region in a state of being spread on the upper surface of the underlay sheet, and is operated by the suction device to be suction-fixed and cut. When the cutting is completed and the conveyor belt starts moving, the suction pressure is reduced by the suction pressure variable device, and the conveyor belt moves with the underlying sheet in a low suction state. At this time, since the front and rear of the underlay sheet are supported by a rotatable drum for applying a certain tension, resistance of the rotating portion is avoided. Rings are provided at both ends of the rotatable drum in accordance with the width of the underlay sheet, thereby preventing lateral displacement of the underlay sheet.

An embodiment of the present invention will be described below with reference to the drawings. 1 and 2 are a perspective view and a side view showing the structure of this embodiment. In the figure, 4 is a movement amount detector that detects the movement amount of the conveyor belt 1 and feeds back to the control device, 7 is a suction pressure variable device that changes the suction pressure of the suction device 6 in accordance with a command from the control device, and 8 is an extension An underlay sheet, which is a porous material including a region a, a cutting region b, and a pickup region c, a rotatable drum 9 having both ends supported by bearings and applying a constant tension to the underlay sheet 8, and 10 It is a lateral displacement prevention ring. Note that portions denoted by the same reference numerals as those in FIG. 3 are portions having the same configuration and the same function.

In this embodiment, (a) the sheet-like member 11 to be cut is expanded in the extension area a. (B) The sheet is conveyed to the cutting area b by moving the conveyor, and cutting is started. (C) After the cutting, the conveyor is again moved to the pickup area c by moving the conveyor, and the parts cut manually are picked up. It is configured to perform the above repetitive work. At the time of cutting, the suction device 6 is controlled by the suction pressure variable device 7 and is operated in a high suction pressure state, so that the suction device 6 is covered via the suction holes of the suction table 5, the suction holes of the conveyor belt 1, and the underlying sheet 8 of the porous material. The cutting sheet member 11 is fixed to the upper surface of the base sheet 8 with high suction pressure and cut. Generally, an inverter is used as the suction pressure variable device 7.

At the time of feeding the conveyor, the suction device 6 is controlled by the suction pressure variable device 7 and is operated in a low suction pressure state so that the underlay sheet 8 is fixed to the upper surface of the conveyor belt 1 with a low suction pressure, whereby the conveyor belt 1 is fixed. The underlay sheet 8 is also sent along with the feed. The front and back of the underlay sheet 8 are supported by a rotatable drum 9 and a certain tension is applied, so that the resistance of the rotating portion is avoided, and the underlay sheet 8 is sent almost in synchronization with the feeding of the conveyor belt 1. Rings 10 are attached to both ends of the rotatable drum 9 in accordance with the width of the underlay sheet 8.
To prevent horizontal misalignment. From the extension area a to the cutting area b,
When the conveyor belt 1 is moved from the cutting area b to the pickup use area c, the conveyor belt 1 is moved by the set amount of movement in accordance with a command from the control device by pressing a conveyor movement switch. During this time, the movement amount of the conveyor belt 1 is fed back to the control device by the movement amount detector 4 installed on the upper surface of the conveyor belt 1, and accurate positioning is performed.

[0010]

As described above, according to the present invention, it is possible to prevent the conveyor belt from being damaged by using an inexpensive underlay sheet, and to convey the underlay sheet from the pickup area to the spreading area. Productivity can be avoided, and when moving the conveyor belt,
By fixing the underlay sheet in a low suction state and avoiding the resistance of the rotating parts before and after the underlay sheet, the underlay sheet can be moved synchronously.

[Brief description of the drawings]

FIG. 1 is a perspective view of a conveyor device showing one embodiment of the present invention.

FIG. 2 is a side view of a conveyor device showing one embodiment of the present invention.

FIG. 3 is a side view showing one embodiment of a conventional conveyor device.

FIG. 4 is a side view showing another embodiment of the conventional conveyor device.

FIG. 5 is a partial side view for explaining a part of FIG. 4;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Conveyor belt 2 Drive drum 3 Servo motor 4 Movement amount detector 5 Suction table 6 Suction device 7 Suction pressure variable device 8, 8 'Underlay sheet 9 Rotatable drum 10 Lateral deviation prevention ring 11 Sheet member to be cut

Claims (1)

[Claims] 1. A conveyor belt having a large number of suction holes over its entire length including an extension area, a cutting area, and a pickup area, a conveyor driving unit for moving the conveyor belt, and An underlay sheet wound around the perimeter of the porous material, an X-axis drive section and a Y-axis drive section for moving the cutter head in all directions within the cutting area, and on the underlay sheet facing the cutter head. A sheet member to be cut and expanded, and a suction device that suction-fixes the sheet member to be cut onto the underlay sheet,
In a conveyor type automatic cutting machine having a control unit for controlling these, a rotatable drum for applying a constant tension before and after the underlay sheet, and a variable suction pressure for reducing the suction pressure of the suction device when the conveyor moves. An underlay sheet feeder for a conveyor-type automatic cutting machine, comprising a device.