Metal fitting separation device

Abstract

To provide a metal fitting separation device for readily and safely separating a metal fitting having a substantially U-shaped cross section and fitted to a blanket that has been used in an offset printing machine.SOLUTION: A device 1 separates a metal fitting having a substantially U-shaped cross section and fitted to an end of a blanket that is wound around a blanket cylinder of an offset printing machine from the blanket, the device including: a guide table 2 for positioning a metal fitting with a guide groove 21 that is formed at a top surface; a guide roller 3 fitted on a front side of the guide table 2; a wedge-shaped rotary cutter 4 positioned above the guide roller 3 and press-fitted to an opening of a metal fitting to push and open the metal fitting; and a motor M for rotating the wedge-shaped rotary cutter 4.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a U-shaped metal fitting attached to both ends of a blanket wound around a blanket cylinder of an offset printing press, and a separating device for separating the blanket.

Background Art

[0002] In an offset printing press, a blanket in which a cloth sheet such as a woven fabric and an elastic material such as rubber are laminated is used, and at both ends of the blanket, a metal fitting also called a fillet bar having a substantially U-shaped cross section made of aluminum for winding around the blanket cylinder is sandwiched.

[0003] When the blanket, which is a consumable, is removed from the blanket cylinder and discarded in order to be replaced with a new one, if the metal fitting remains attached, it is treated as industrial waste and must be disposed of at a cost. However, in order to recycle each material, the blanket laminated with a woven fabric or a cloth sheet and an elastic material such as rubber and the aluminum metal fitting were manually separated using tools such as pliers and a cutter.

[0004] This work requires a great deal of labor and time, so it is not only difficult to separate and recover all the metal fittings, but also the manual separation is dangerous.

[0005] Subsequently, a metal fitting removing device according to Patent Document 1 (Japanese Patent No. 4858163) was invented. As described in Patent Document 1, a metal fitting removing device for removing a blanket and a clamping metal fitting by cutting a part of the clamping metal fitting at both ends of the blanket is known.

Prior Art Documents

Patent Documents

[0006]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0007] However, in the conventional blanket fitting removal device described above, along the longitudinal direction of the fitting having a substantially U-shaped cross section, the tightening round blade and the receiving roll linearly tighten and bend it, causing the surface plate to stand up from the blanket main body surface. After the clamping state of the blanket fitting is released, the cutting round blade and the receiving roll cut along the tightening bending line, and the surface plate is separated. As a result, the fitting and the blanket are separated. However, since the device according to Patent Document 1 requires two round blades, namely, a tightening round blade and a cutting round blade, miniaturization of the device has not been achieved. Not only does it take up installation space, but also because two round blades are used, its adjustment and maintenance are time-consuming and inefficient, and it is also expensive in terms of cost. In addition, when separating the blanket and the fitting, since the fitting is cut with a round blade, at least the surface plate of the fitting after cutting is curved and greatly deformed. Therefore, when storing it for recycling, it takes up a lot of space, making management complicated, and also requires a large amount of space for storage. That is, the problem to be solved by the present invention is to provide a small separation device that is inexpensive, has good workability, and high safety.

Means for Solving the Problems

[0008] The invention according to claim 1 of the present invention is a device for separating a fitting having a substantially U-shaped cross section attached to an end of a blanket wound around a blanket cylinder of an offset printing machine from the blanket, comprising a guide base for positioning the fitting by a guide groove formed on the upper surface, a guide roller attached in front of the guide base, a wedge-shaped rotary blade positioned above the guide roller and press-fitted into the opening of the fitting to push open the fitting, and a motor for rotating the wedge-shaped rotary blade.

[0009] The invention according to claim 2 of the present invention is In the metal fitting separating device according to claim 1, the guide roller is a metal fitting separating device having an annular groove portion for holding the posture of the metal fitting.

[0010] The invention according to claim 3 of the present invention is In the metal fitting separating device according to claim 2, the guide width at the tip of the guide groove formed on the upper surface of the guide base is wider than the width of the metal fitting and is the same as the width of the annular groove portion of the guide roller, which is a metal fitting separating device.

[0011] The invention according to claim 4 of the present invention is In the metal fitting separating device according to any one of claims 1 to 3, on the outer peripheral edge of the wedge-shaped rotary blade, there is an annular wedge portion composed of a tip portion formed at an acute angle and a base end portion formed at a larger angle than the tip portion on the center side, which is a metal fitting separating device.

Advantages of the Invention

[0012] According to the invention described in claim 1, it is composed of a guide base having a guide groove on the upper surface, a guide roller attached in front of the guide base, a wedge-shaped rotary blade located above the guide roller and press-fitted into the opening of the metal fitting to push open the metal fitting, and a motor for rotating the wedge-shaped rotary blade. Since the number of parts is small, miniaturization can be achieved, it can be manufactured at low cost, and safety can also be ensured. In addition, since there is no need to cut the metal fitting, the torque of the motor is also minimized, wasteful energy consumption can be suppressed, the wear of the wedge-shaped rotary blade is also small, and maintenance is easy and economical.

[0013] According to the invention of claim 2, since the annular groove portion of the guide roller can hold the posture of the metal fitting before separation, complicated operations are not required, and the blanket and the metal fitting can be separated easily and in a short time, significantly improving the working efficiency.

[0014] According to the invention of claim 3, since the guide width of the guide groove formed on the upper surface of the guide base is wider than the width of the fitting and is the same as the width of the annular groove portion of the guide roller, when sending the fitting from the guide groove on the upper surface of the guide base to the annular groove portion of the guide roller, the fitting is surely positioned, smoothly sent without getting caught or losing its posture, and the wedge-shaped rotary blade is surely press-fitted into the opening of the U-shaped fitting. Therefore, it is possible to prevent the error that separation becomes difficult due to causing unintentional deformation of the fitting by the wedge-shaped rotary blade, and to surely separate, so that by suppressing the occurrence of unnecessary costs, it is possible to improve the working efficiency and prevent economic losses.

[0015] According to the invention of claim 4, since the outer peripheral edge of the wedge-shaped rotary blade has an annular wedge portion composed of a tip portion formed at an acute angle and a base end portion formed at a larger angle than the tip portion on the center side thereof, first, the tip portion formed at an acute angle surely abuts against the opening of the U-shaped fitting. After the U-shaped fitting is pushed open into a V shape by the wedge-shaped rotary blade, it can be further pushed open more by the base end portion formed at a larger angle than the tip portion. Therefore, separation from the blank end material can be easily and safely performed in one step by one wedge-shaped rotary blade, and the working efficiency and safety can be improved.

[0016] The U-shaped fitting from which the blank end material has been separated and removed does not deform significantly except being opened into a V shape and maintains a long rod-like shape. Therefore, it is very efficient in subsequent storage, transportation, etc. In the past, it was disposed of at a cost as industrial waste, but since only the fitting can be recovered, it has an economic effect of being taken back as a valuable item.

Brief Description of the Drawings

[0017]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Mode for Carrying Out the Invention

[0018] Hereinafter, embodiments of the present invention will be described by way of examples.

[0019] FIG. 1 is a perspective view of a separating device 1 for fittings according to an embodiment, FIG. 2 is a front view of the separating device for fittings according to the embodiment, and FIG. 3 is a plan view of the separating device for fittings according to the embodiment. In addition, in FIGS. 2 and 3, the safety cover 8 made of a translucent plate-like body such as an acrylic plate appearing in FIG. 1 is omitted.

[0020] As shown in FIGS. 1 to 3, the separating device 1 for fittings according to the embodiment includes a guide base 2, guide rollers 3 in front of the guide base 2, and a wedge-shaped rotary blade 4 driven by a motor M above the guide rollers 3. The guide width 21W of the guide groove 21 formed on the upper surface of the guide base 2 is wider than the width 5W of the fitting (see FIG. 5) and is the same as the width 31W of the annular groove portion of the guide roller 3 (see FIG. 6).

[0021] FIG. 4 shows a used blanket 6 of an offset printing machine. FIG. 4(a) is a plan view of the blanket with fittings 5 attached to both ends, and FIG. 4(b) is a side view of the blanket with fittings 5 attached to both ends.

[0022] First, as a preliminary preparation for separating the fittings using the separating device for fittings, the fitting portion is separated by any method such as a cutter knife along the fittings 5 attached to both ends from the blanket removed from the blanket cylinder (not shown).

[0023] As shown in FIG. 5, the separated metal fitting portion still has a blanket end material 6a, which is a part of the blanket, fastened and fixed thereto.

[0024] Figure 6 is a front view of the separation device without the guide table 2, and Figure 6(a) shows the state before separation, with the U-shaped opening 51 (see Figure 5) of the metal fitting 5 to which the blanket end material 6a is clamped and fixed facing up, Figure 6(b) shows the U-shaped opening 51 of the metal fitting 5 to which the blanket end material 6a is clamped and fixed being pushed open into a V-shape by the wedge-shaped rotating blade 4, and Figure 6(c) is a side view of the same.

[0025] When a switch (not shown) of the metal fitting separating device 1 is turned ON, the motor M starts to rotate and the wedge-shaped rotary blade 4 starts to rotate. After that, the metal fitting 5 with the blanket end material 6a still fastened and fixed is set in the guide groove 21 on the upper surface of the guide table 2 shown in Figures 2 and 3, and with the guide groove 21 keeping the metal fitting 5 in an upright position with its U-shaped opening 51 facing up, it is slid from the guide groove 21 towards the guide roller 3 in front. When the tip of the metal fitting 5 to which the blanket end material 6a is clamped and fixed is guided into the annular groove portion 31 of the guide roller 3, the metal fitting 5 to which the blanket end material 6a is clamped and fixed is wound into the wedge-shaped rotating blade 4 driven by a motor M above the guide roller 3 in a U-shaped opening 51 of the metal fitting 5 while being supported by the annular groove portion 31 of the guide roller 3, and the wedge-shaped rotating blade 4 moves forward while being pressed in.

[0026] As shown in Figure 7, the wedge-shaped rotary blade 4 has an annular wedge portion 41 consisting of a tip portion 4a formed at an acute angle on the outer periphery and a base portion 4b formed at the center side at a larger angle than the tip portion 4a. First, the tip portion 4a of the wedge-shaped rotary blade 4 bites into the U-shaped opening 51 of the metal fitting 5, pushing the opening 51 open in a V shape by the angle of the tip portion 4a, and then the rotational motion of the wedge-shaped rotary blade 4 pushes it forward.

[0027] The fitting 5 pushed forward is discharged from the separating device in a state where the blanket end material 6a that had been tightened and fixed is released, by having the base end portion 4b, which is formed at a larger angle than the tip end portion 4a of the annular wedge portion 41, deeply press-fitted, so that the fitting 5 is pushed open into a wider V-shape over its entire length.

[0028] If the annular wedge portion 41 is formed at an acute angle, it becomes easy to enter the opening 51 of the U-shaped fitting 5, but the V-shaped opening may not be sufficient and the blanket end material 6a may not be completely separated. By integrally providing the base end portion 4b, which has a larger angle than the tip end portion 4a formed at an acute angle, the opening 51 of the fitting 5 reliably opened by the tip end portion 4a is further opened wider, becoming a wide V-shape in one step, and the blanket end material 6a is released from the fitting 5 and discharged in a separated state or a state where separation is easy. In FIG. 7, (a) is an example in which the cross-sectional shapes of the tip end portion 4a and the base end portion 4b are formed as straight lines, and (b) is an example in which the cross-sectional shapes of the tip end portion 4a and the base end portion 4b are formed as curves. In any case, the base end portion 4b, which has a larger angle than the tip end portion 4a, is integrally provided.

[0029] Those discharged in a state where the fitting 5 and the blanket end material 6a are separated are respectively accumulated and managed. Those discharged in a state where they cannot be completely separated by an adhesive or the like are separated manually and then respectively accumulated and managed, and the fitting 5 can be disposed of as a valuable item.

[0030] The wedge-shaped rotary blade 4 is integrally attached to the motor M, and a height adjustment bolt 7 can be installed so that fine adjustment can be made for differences in the size of the fitting 5.

Explanation of Signs

[0031] 1 ··· Fitting separating device 2 ··· Guide table 21 ··· Guide groove 21W ··· Guide width 3 ··· Guide roller 31 ··· Annular groove portion Width of the annular groove part of 31W 4 ··· Wedge-shaped rotary blade 4a ··· Tip part 4b ··· Base end part 41 ··· Annular tip part 5 ··· Fitting 51 ··· Opening part 5W ··· Width of the fitting 6 ··· Blanket 6a ··· Blanket end material 7 ··· Height adjustment bolt 8 ··· Safety cover M ··· Motor

Claims

1. An apparatus for separating a U-shaped metal fitting attached to an end of a blanket wound around a blanket cylinder of an offset printing press, comprising: a guide base for positioning the metal fitting by a guide groove formed on an upper surface thereof; a guide roller attached in front of the guide base; a wedge-shaped rotary blade positioned above the guide roller and press-fitted into an opening of the metal fitting for pushing open the metal fitting; and a motor for rotating the wedge-shaped rotary blade.

2. The apparatus for separating a metal fitting according to claim 1, wherein the guide roller has an annular groove portion for holding the posture of the metal fitting.

3. The apparatus for separating a metal fitting according to claim 2, wherein a guide width at a tip of the guide groove formed on the upper surface of the guide base is wider than a width of the metal fitting and is the same as a width of the annular groove portion of the guide roller.

4. The apparatus for separating a metal fitting according to any one of claims 1 to 3, wherein an outer peripheral edge of the wedge-shaped rotary blade has an annular wedge portion formed of a tip portion formed at an acute angle and a base end portion formed at a larger angle than the tip portion on a center side thereof.

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