JPH0630396Y2 - Stripping mechanism of punching device for sheet material - Google Patents

Description

[Detailed Description of the Invention] (Industrial field of application) The present invention is a punching process for a sheet-like material, which is for punching a sheet-like material made of a relatively soft material such as paper, cardboard, corrugated paper, and resin-coated paper. The present invention relates to a strip mechanism provided in an apparatus.
More specifically, the present invention relates to improvement in durability of a strip mechanism for removing and discharging punching scraps generated when a sheet material is punched by a sheet material punching device.

(Prior art and its problems) As a punching device for sheet-like material, a punching die such as a planar shape or a cylindrical shape in which punching blades are arranged and fixed in a predetermined shape and a sheet-like material to be processed are placed. It is composed of a work table, and the sheet material placed on the work table is configured to be punched into a predetermined shape with a punching blade by vertically moving and rotating the punching die. Are known. In such a sheet material punching device, the sheet material is cut into a product portion and a punching scrap piece by the punching process, but the punching scrap piece may be fitted into or adhered to the punching blade. In some cases, it is impossible to perform continuous punching, so that the punching die is often provided with a strip mechanism for removing and discharging punching scraps.

Conventionally, as the above-mentioned strip mechanism, there has been known one in which an elastic material such as sponge or rubber is attached to a punching die with an adhesive material in the protruding direction of the punching blade.

In this conventional stripping mechanism, the elastic material is pressed and shrunk by the portion of the sheet-shaped material that becomes the punching scraps as the punching blade cuts into the sheet-shaped material during punching, and the punching is performed after punching. As the punching blade is separated from the sheet-shaped material, the elastic material expands due to its elasticity and pushes out a punching scrap piece to remove and discharge it from the punching blade.

According to such a conventional strip mechanism, sponge,
The elastic material made of rubber or the like is easily deteriorated and loses elasticity, so that the above-mentioned contraction and extension actions are not smoothly performed, and the adhesive applied to the punching die has the stress of the contraction and extension actions. There is a problem in terms of durability that the adhesive force is reduced in a short period of time due to receiving or chemical modification.

(Object of the Invention) The present invention has been made to solve the above-mentioned problems, and an object thereof is to provide a stripping mechanism of a punching device for a sheet-shaped material having good durability.

(Structure of the Invention) In order to achieve the above-mentioned object, the strip mechanism of the punching device for sheet-like material according to the present invention is a punching die having a punching blade fixed to a sheet-like material placed on a work table. In a sheet-shaped material punching device configured to be punched, a cylindrical casing embedded in a punching die, and a protruding length fixed to the casing that is substantially the same as that of a punching blade and near the tip thereof. A pin provided with a non-slip portion, a casing, a tubular collar slidably fitted between the pins and having a sliding area restricted by the casing so that the protrusion of the tip of the pin is approximately the same as the pin, and the casing The structure is characterized in that it is equipped with a strip mechanism including a spring that is attached to the rear end side of the inside of the collar and biases the collar in the protruding direction.

(Operation) In the above-mentioned configuration, the collar elastically slid by the spring removes and discharges the punching scraps by the above-mentioned contraction and extension action, but unlike the conventional configuration made of sponge, rubber, etc. To achieve the purpose of improving durability.

Further, fixing the collar to the punching die through the casing achieves the purpose of strengthening the attachment of the strip mechanism to the punching die and improving the durability.

Further, the pin having the non-slip portion serves as a guide for the operation of the collar and prevents the accidental disengagement by piercing the punching scrap piece at the time of punching, and the punching by the contraction and extension action of the collar described above. Supports the removal and discharge function of scraps.

(Embodiment) An embodiment of the strip mechanism of the punching device for sheet material according to the present invention will be described below with reference to the drawings.

The illustrated embodiment is equipped with a punching device for sheet-like materials which is configured to vertically move a punching die C in which a punching blade B is fixed to a flat work table A. Corrugated paper (sheet material) D is shown as the material to be processed.

In this embodiment, a structure including each member of the casing 1, the pin 2, the collar 3, and the spring 4 is shown, and these respective members are assembled and attached to the punching die C.

The casing 1 has a shape that is fitted and fixed in a mounting hole E formed in the punching die C and is firmly embedded in the punching die C. Has a fitting and fixing portion 11 for the pin 2 and has a stopper 12 for a collar 3 which will be described later in the upper portion (the lower portion in the drawing) of the embedding. The number and position of the casings 1 mounted on the punched pieces C are selected depending on the shape, size, etc. of the punched scrap pieces F. When the casing 1 is fitted and fixed in the mounting hole E, it is possible to further enhance the mounting strength by applying an adhesive material or engraving a screw on the outer periphery of the casing 1.

The pin 2 is a non-slip portion 21 having an umbrella shape with a continuous cross section at the tip.
The rear end has a flange 22 that fits into the fitting / fixing portion 11 of the casing 1.
It is adapted to be inserted and fixed on the axial center line of the casing 1 by being fitted in. The protruding length of the pin 2 by the punching die C is substantially the same as that of the punching blade B fixed to the punching piece C. The shape of the non-slip portion 21 of the pon 2 can be selected to have an appropriate uneven shape depending on the type of the corrugated paper D (punching scraps F), etc., and preferably the portion around the non-slip portion 21 of the pin 2 is hardened. It is heat-treated and wear resistant.

The collar 3 is fitted between the casing 1 and the bottle 2, and is slidable in the axial direction of the casing 1 and the pin 2.
A flange 31 is provided at the rear end of the casing 1
The stopper 12 prevents the sliding area from being pulled out. The tip of the collar 3 is set so that the punching piece F and the punching die C of the abutting portion 32 are projected to the length of the pin 2.

The spring 4 is housed inside the casing 1, and the flange 22 of the pin 2 and the flange of the collar 3 are accommodated.
It is mounted so as to urge the collar 3 in the protruding direction between it and 31.

In such an embodiment, as the punching die C descends with respect to the work table A on which the corrugated paperboard D is placed and the punching blade B fixed to the punching die C is inserted into the corrugated paperboard D. , The non-slip portion 21 at the tip of the pin 2 is corrugated cardboard paper D as shown in FIG.
While being pierced through the (punching scrap F), the contact portion 32 is pressed against the corrugated cardboard paper D (punching scrap F) at the tip of the collar 3 against the spring 4 in the punching die C direction. fall back. Then, when the punching of the corrugated cardboard paper D is completed, the punching die C is lifted from the work table A.
As shown in the figure, the punching scraps F are held by the non-slip portion 21 of the pin 2 while resisting the elastic force of the spring 4 and the collar 3. In the state shown in FIG. 4, the non-slip portion 21 of the pin 2 is gradually
Friction between the cutting scrap F and
Is overcome, and the punching scrap F is pulled out from the pin 2 and removed by the abutting portion 32 of the collar 3 as shown in FIG. Therefore, between the states of FIG. 4 and FIG.
For example, by removing the punched product portion of the corrugated paper D from the work table A, continuous punching can be performed.

In the action of removing and discharging the punched dust pieces F, the operation of the collar 3 corresponds to the operation of the conventional elastic material made of sponge, rubber or the like, but the elasticity which is the background of the operation of the collar 3 is the spring 4. Therefore, it does not deteriorate and its elasticity does not decrease, and it has good durability. Further, since the collar 3 is firmly fixed to the punching die C through the casing 1,
The punching scraps F have good durability without dropping or rattling from the punching die C due to the stress of removing and discharging the punching scraps F. In addition, the operation of the collar 3 is that the casing is 1 pin 2
The direction of the operation is accurate because it is guided by, and the slipping part 21 of the pin 2 unexpectedly drops the punching scrap F (for example, on the product part of the punched corrugated paper D). It is possible to ensure the removal and discharge action of the punching scrap pieces F by preventing (falling off to the end).

(Effects of the Invention) As described above, the strip mechanism of the punching device for sheet material according to the present invention has good durability, and has the efficiency of prolonging the service life of the punching device for sheet material.

Further, by providing the pin having the non-slip portion, the removal and discharge action of the punching scrap piece becomes reliable, and there is an effect that the efficiency of punching by the punching device for sheet material and the accuracy of product finish are improved.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of a strip mechanism of a punching device for sheet-like materials according to the present invention, and FIG. 2 is an X- line in FIG.
X-ray sectional views and FIGS. 3 to 5 are sectional views showing the operating state of FIG. 1, respectively. 1 ...... Casing, 2 ... Pin 3 ... Color, 4 ... Spring A ... Work table, B ... Punching blade C ... Punching die D ... Corrugated paper (sheet material) F ... Punching Scrap 21 ... Skid

Claims (1)

[Scope of utility model registration request] 1. A punching device for a sheet-shaped material, wherein a punching die having a fixed punching blade is used to punch a sheet-shaped material placed on a work table, and a cylinder embedded in the punching die. -Shaped casing, a pin inserted through and fixed to the casing and having a protruding length that is substantially the same as the punching blade, and a non-slip portion provided near the tip thereof, and the tip of which is slidably fitted between the casing and the pin Strip consisting of a tubular collar whose sliding area is regulated by the casing so that the protrusion of the collar is approximately the same as the pin, and a spring that is attached to the rear end side of the collar inside the casing and biases the collar in the protrusion direction. A stripping mechanism for a sheet-shaped material punching device, which is provided with a mechanism.