JPS588479Y2 - Rotary knife holder - Google Patents

Description

[Detailed description of the invention] This invention relates to a rotary blade holder used in a punching machine for corrugated paper, etc. More specifically, the invention relates to a cylindrical rubber elastic blade holder with a cross-sectional shape at both ends, into which iron inserts are inserted. The rubber elastic blade holder is wound around a cylindrical drum having grooves carved in the axial direction, and both ends are butted and fitted into the grooves of the drum. By inserting a hard fitting plate in the direction of the drum axis into the gap created in the abutting part, the purpose is to prevent the rubber elastic blade holder from coming off the drum and to make the replacement work extremely simple. It is.

Conventionally, as shown in FIG. 1, this type of rotary blade holder has an axial groove 4 carved in the outer peripheral surface of a cylindrical drum 1.
As shown in the figure, the mounting pieces 3, 3 are L-shaped at both ends.
A sheet-like blade holder made of a rubber elastic material 2 such as polyurethane having a 100% polyurethane is attached to the outer peripheral surface of the drum 1, and its mounting pieces 3 and 3' are placed in the groove 4 with a very small gap left. A presser metal fitting 6 having a T-shaped cross section with a bolt hole 7 as shown in FIG. A knife holder such as the above-mentioned knife holder is used in which a connecting plate 5 of the same quality as the knife holder is attached with an adhesive, but this has the disadvantage that replacement work requires a long time.

The present invention was devised to overcome these drawbacks, and is characterized in that both ends of the blade holder are molded into a special shape in order to greatly simplify the replacement work.

The present invention will be explained in detail below.

Fig. 3 is a front view of a plurality of rotary turrets according to the present invention connected in series in use, Fig. 4 is a perspective view of the rotary turret of the present invention, and Fig. 5 is a butting portion of both ends thereof. FIG. 6 is a partially enlarged cross-sectional view showing the connecting portion of the blade holder.

As shown in FIG. 4, the knife holder of the present invention is constructed by coating a rubber elastic body 2, 2' such as polyurethane on the front and back surfaces of a thin iron insert plate 3 with elasticity, thereby forming a cylindrical drum 1 for a corrugated paper punching machine. It is molded into a cylindrical shape so as to fit the outer circumferential surface of the holder, and both ends thereof are made of a rubber elastic material and form mounting pieces 5 and 5' having a U-shaped cross section.

However, this cylindrical blade holder usually has a width of 270mm
1. The length of the insert iron plate is 200 mm, and the iron plate with elasticity is 0.6 mm thick, and the thickness of the rubber elastic body is the same as the surface of the iron plate insert (the surface that comes into contact with the cutting blade).
Appropriately, the thickness is 6.0 to 6.4 mm, and the thickness of the back side of the iron plate (the surface in contact with the outer circumference of the drum) is 0.2 to Q, 3 mm.

In addition, the width W of the groove 4 of the drum 1 must be slightly larger than the width W of the groove 4 of the drum 1 so that the abutting portions of the mounting pieces at both ends of the blade holder do not slip out of the groove of the drum.

The cylindrical knife holder made of the rubber elastic body thus molded is wrapped around the outer periphery of the cylindrical drum 1 as shown in FIG. The upper surface J of the mold is abutted and fitted into the concave groove 4 of the drum 1, and then a rectangular fitting plate 6 as shown in FIG. Installation is completed by doing this.

When used, a plurality of blade holders thus attached to the drum are connected together as shown in FIG. 3.

The fitting plate 6 used here is preferably made of rigid metal or plastic such as polyethylene, polyamide, polycarbonate, etc.

Also, the cross-sectional shape of the groove 4 carved in the drum 1 is similar to that of the mounting piece 5,
In order to prevent the butt part 5' from slipping out of the groove, the side surface of the groove can be formed into a tapered shape that widens downward, but the blade holder of the present invention uses a steel insert plate with strong elasticity as described above. Therefore, within the groove 4, a pressing force as shown by the arrow is applied to the mounting pieces 5, 5' on the groove side surface, and at the same time, the width of the butt part of the mounting pieces 5, 5' of the blade holder is slightly wider than the groove of the drum. Since the groove is wide, the mounting piece 5 of the rubber elastic body cannot fit inside the groove.
, 5' compressive stress acts on the abutting portions, and as a result, the abutting portions do not come out of the grooves, and even if the side surfaces of the grooves are vertical as in the present invention, there is no functional problem. Never.

Next, when the cylindrical blade holder made of the rubber elastic body according to the present invention is damaged and needs to be replaced, it is easy to remove the fitting plate from the abutting part and then removing the abutting part from the groove of the drum. Can be replaced.

As described above, the rotary blade holder according to the present invention is a blade holder made of a cylindrical rubber elastic body with a cylindrical drum with grooves carved in the axial direction and U-shaped mounting pieces at both ends. The conventional knife holder is made by winding the two ends together, abutting both ends and fitting it into the drum groove, and inserting a highly rigid fitting plate (rod) in the drum axis direction into the space created at the abutting part. It can be replaced more easily than the stand, and since the abutting part is firmly fitted and fixed within the drum groove, there is no concern that the blade holder will separate from the drum, and it can be replaced with a conventional drum with grooves. It has many advantages, such as being able to be used as is and being economical since no adhesive is used.

[Brief explanation of the drawing]

Figure 1 is a side view of a conventional rotary blade holder and a drum with grooves used in the rotary blade holder of the present invention. Figure 2 (opening) is a perspective view of a connecting plate of the same quality as a conventional blade holder, and Figure 2 (c) is the same (T-shape used in the fitting part of a conventional rotary blade holder). Fig. 3 is a front view of the rotary knife holder of the present invention in use when a plurality of rotary knife holders are connected in series, Fig. 4 is a perspective view of the rotary knife holder of the present invention;
Fig. 5 is a perspective view of a fitting plate used in the abutting portion of the rotary knife holder of the present invention, and Fig. 6 is a partially enlarged sectional view of the rotary knife holder of the present invention with both ends attached to the drum groove. shows.

Claims (1)

[Scope of utility model registration request] A concave groove 4 in the axial direction is carved at a suitable location on the outer circumferential surface of the cylindrical drum 1, and separately, the front and back surfaces of a thin iron plate insert 3 are covered with rubber elastic bodies 2, 2' of appropriate thickness, and the outer circumferential surface of the drum is Mounting pieces 5 and 5', which are molded into a cylindrical shape so as to fit approximately, and whose ends are formed into a U-shape, are butted against each other, and the width of this abutting part is made slightly wider than the width of the concave groove of the drum 1. Concave groove 4
A rotary knife holder characterized in that a hard fitting plate 6 having the same rectangular shape is inserted in the axial direction into a gap having a rectangular cross section formed in the U-shaped abutting portion.