JPH0742630Y2 - Cutting device for resin sheets - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] In the present invention, for example, in the manufacturing process of a packaging vinyl bag or vinylon bag, a cylindrical resin sheet such as vinyl or vinylon is The present invention relates to a cutting device for a resin sheet or the like that is used when cutting along a welding line that is the bottom side.

[Conventional technology]

Conventionally, this type of cutting device has a linear fixed blade formed on one side of a pedestal on which a resin sheet or the like is placed, and is movable up and down with respect to the fixed blade or a swing center on one end side in the longitudinal direction of the fixed blade. In addition, it was configured as a "push-cut" or "scissors" that performs a cutting action with a swingable movable blade.

[Problems to be solved by the device]

The above-mentioned conventional example has the following problems. That is,
As described above, the resin sheet cut in the bag-making step has a tubular shape and is cut in a two-ply state. However, in the above conventional example, the two-ply resin sheet is movable. When cutting with the blade and the fixed blade, the movable blade and the fixed blade are strongly pressed, so that the cut edges of the two resin sheets forming the opening of the bag stick to each other and the snap fastener for the opening of the bag. This causes inconvenience in the subsequent steps such as installation of.

In view of the above-mentioned conventional drawbacks, the present invention can prevent the cutting edges of the upper and lower resin sheets from sticking to each other when cutting the two resin sheets in a stacked state, and also has a good sharpness for a long period of time. It is an object of the present invention to provide a cutting device for a resin sheet or the like that can bring out the above effects.

[Means for Solving the Problems]

The technical means taken by the present invention to achieve the above object are as follows. That is, the cutting device for resin sheets and the like according to the present invention forms a slit in a pedestal on which the resin sheet or the like is placed, and provides a blade body that moves along the slit in a state of protruding from the slit. Is provided with a movable member that has a pressing surface facing the pedestal on both sides of the slit and is movable up and down, and the blade body is slit with a resin sheet or the like sandwiched between the pressing surface of the movable member and the pedestal. A cutting device for a resin sheet or the like adapted to be moved along a blade, and by making the moving path of the blade non-parallel to the pedestal upper surface, the blade can move along the slit as the blade moves. It is characterized in that the amount of protrusion from the slit is gradually changed.

[Action]

According to the above configuration, the blade body moves in the width direction of the resin sheet with respect to the resin sheet sandwiched between the pressing surface of the movable member and the pedestal, and cuts the resin sheet.

Therefore, the resin sheets are not strongly pressed in the thickness direction, and even when two resin sheets are cut in a stacked state like the cutting work in the bag making process, the cut edges of the upper and lower resin sheets are stuck to each other. There is no fear that it will end.

Moreover, the moving path of the blade is non-parallel to the upper surface of the pedestal, and the amount of protrusion from the slit of the blade gradually changes as the blade moves, so that the action portion of the blade edge, that is, Actually, the position of contact with the resin sheet gradually changes in the longitudinal direction of the blade edge, and the entire or wide area of the blade edge is evenly provided for cutting, and good sharpness is exhibited for a long period of time. .

〔Example〕

 Embodiments of the present invention will be described below with reference to the drawings.

The drawings show a cutting device for resin sheets and the like according to the present invention. In the figure, 1 is a pedestal on which the resin sheet A and the like are placed, and the pedestal 1 is formed with a slit 2 over its entire length. Reference numeral 3 denotes a triangular blade body that horizontally reciprocates along the slit 2 while protruding from the slit 2, and each of the hypotenuse portions has blade edges 3a and 3b. Reference numeral 4 denotes a drive mechanism for reciprocating the blade body 3, which is composed of an air cylinder or the like. Above the pedestal 1 is provided a rod-shaped movable member 5 having two linear pressing surfaces S, S facing the pedestal 1 on both sides of the slit 2 and which is vertically movable. Reference numeral 6 is a slit that faces the slit 2, and is formed in the movable member 5. Reference numeral 7 denotes a drive mechanism for moving the movable member 5 up and down, which is composed of an air cylinder or the like. Reference numeral 8 is a frame of the cutting device.

As shown in FIGS. 2 and 3, the reciprocal movement path X of the blade 3 is not parallel to the upper surface of the pedestal 1 (pressing surfaces S, S of the movable member 5), and the blade 3 is along the slit 2. As you move
The amount of protrusion of the blade 3 from the slit 2 is configured to gradually change.

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

First, as shown in phantom in FIG. 4, the movable member 5 is lowered with the resin sheet A placed on the pedestal 1.
As shown in FIG. 6, the resin sheet A is sandwiched between the pressing surfaces S, S of the movable member 5 and the pedestal 1.

In this state, the blade body 3 moves in one direction along the slit 2, whereby the resin sheet A is cut by the one blade edge 3a or 3b.

When the cutting is completed, the movable member 5 rises, so that the cut resin sheet A is taken out of the apparatus and the next resin sheet A to be cut is drawn from the resin sheet roll to a predetermined position.

After that, the movable member 5 is lowered to sandwich the resin sheet A between the pressing surfaces S of the movable member 5 and the receiving table 1.

When the blade body 3 is moved in the opposite direction in this state, the resin sheet A is cut by the other blade edge 3b or 3a.

In this way, since the blade 3 is moved in the width direction of the resin sheet A to perform cutting, the resin sheet is not strongly pressed and is formed into a tubular shape as shown in FIGS. 5 and 6. Resin sheet such as vinylon (a resin sheet with two sheets stacked)
Even when A and A are cut, the cut edges of the upper and lower resin sheets A and A do not stick to each other.

Particularly, according to the above configuration, the reciprocating movement path X of the blade 3 is
However, as shown in FIGS. 2 and 3, it is non-parallel to the upper surface of the pedestal 1 (the pressing surfaces S, S of the movable member 5), and the blade body 3 moves as the blade body 3 moves. Since the amount of protrusion from the slit 2 gradually changes, the action portion of the blade edges 3a, 3b, that is, the position actually in contact with the resin sheet A gradually changes in the longitudinal direction of the blade edges 3a, 3b, and the blade edges 3a, 3b. The entire area or a wide area is evenly provided for cutting, and good sharpness can be exhibited for a long period of time.

Further, since each of the reciprocating movements of the blade body 3 is used for cutting, there is no time loss as in the case of cutting after returning the blade body 3 to the original position, and the efficiency is good.

[Effect of device]

The present invention has the above-described configuration, and the blade body moves in the width direction of the resin sheet with respect to the resin sheet sandwiched between the pressing surface of the movable member and the pedestal to cut the resin sheet. Therefore, the resin sheet is not strongly pressed in the thickness direction, so that the resin sheet is not pressed like the cutting work in the bag making process.
Even when the sheets are cut in a stacked state, there is no risk that the cut edges of the upper and lower resin sheets will stick to each other.

In particular, according to the present invention, the moving path of the blade body is made non-parallel to the upper surface of the pedestal, and the amount of protrusion from the slit of the blade body gradually changes as the blade body moves. The action part, that is, the position that actually contacts the resin sheet gradually changes in the longitudinal direction of the blade edge, and the entire or wide area of the blade edge is evenly provided for cutting, and it exhibits good sharpness for a long time Can be done.

[Brief description of drawings]

1 to 6 show an embodiment of the present invention. FIG. 1 is a perspective view of a cutting device for resin sheets and the like, FIG. 2 is a vertical sectional front view of an essential part, and FIG. 3 is a configuration of the essential part. Explanatory drawing, FIG. 4 is a side view of the main part, and FIGS. 5 and 6 are a perspective view and a side view of the main part for explaining the operation. 1 ... cradle, 2 ... slit, 3 ... blade, 5 ... movable member, A ... resin sheet, S ... pressing surface.

Claims (1)

[Scope of utility model registration request] 1. A slit is formed in a pedestal on which a resin sheet or the like is placed, and a blade body is provided which moves along the slit while protruding from the slit. Above the pedestal, on both sides of the slit. A movable member having a pressing surface facing the cradle is provided so as to be able to move up and down, and the blade body is moved along the slit while a resin sheet or the like is held between the pressing surface of the movable member and the cradle. A cutting device for a resin sheet or the like, and by making the moving path of the blade non-parallel to the pedestal upper surface, the amount of protrusion from the slit of the blade gradually increases as the blade moves along the slit. A cutting device for a resin sheet or the like, which is configured to change.