JPS6190817A - Cutter for bookbinding - Google Patents

Abstract

PURPOSE:To cut the back section of a bundle of papers to be bookbinded without burr by arranging plural cutters formed with going cutters at the outside while returning cutters at the inside along the rotary direction of cutter base with predetermined interval. CONSTITUTION:A cutter base 1 is driven with such low speed as 1,000RPM while integrally formed plural cutters 2 are arranged along the outercircumferen tial edge section with predetermined interval. The cutter 2 is formed into going cutter section 2a at the outside along the outercircumferential edge of cutter base 1 while into returning cutter section 2b at the inside. Paper bundle P is carried in the arrow direction then the back section is primary cut by the cutter section 2a thereafter sectionary cut by the cutter section 2b at the carry- out side to be deburred and finished.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a bookbinding cutter structure for trimming the back cover of a book to be bound in a bookbinding process.

[Conventional technology]

Conventionally, as cutters for this ridge, there have been, for example, the circular saw cutter shown in FIG. 7, the thin blade type cutter shown in FIG. 8, and other single blade type cutters.

In the circular saw type cutter shown in Fig. 7, 1 is a disc-shaped cutter base, 2 is a sharp cutting blade of a circular saw integrally formed on the outer peripheral edge of the cutter base 1, and 3 is a rotary drive for the cutter base 1. 4 is a mounting hole for fastening the cutter base 1 to the cutting board of the rotary drive system; This is the mounting hole for the blade.

The circular saw cutter shown in FIG. The spine of the paper bundle is trimmed, and a groove for gluing is cut into the trimmed spine by a groove cutting blade.

The thin blade type cutter shown in Fig. 8 has the cutting blade 2 of the circular saw cutter shown in Fig. 7 replaced with a thin blade, and the other configurations are almost the same, so the same or equivalent parts vc are given the same reference numerals. A description of the configuration and operation will be omitted.

Furthermore, the single-blade type cutter (not shown) has one cutting blade fixed to the cutter base using a tightening member, and the other structure is the same as that shown in Figs. 7 and 8. be.

[Problem that the invention seeks to solve]

Among the conventional bookbinding cutters as described above, the circular saw type cutter shown in Fig. 7 has each cutting edge 2 sharp like a saw blade, with each cutting edge pointing in the direction of rotation of the cutter. Because it only has the blade part.

The cutter rotates at low speed to cut the back of the stack of bookbinding pages.
In this case, the depth of cut by the cutting blade 2 is large and the cutting resistance becomes large, resulting in a large parry a as shown in FIG. 9.

Therefore, in the case of the circular saw type cutter mentioned above, it is usually 8UUOR.
The PM must be rotated at high speed, and the high speed rotation generates significant noise, which is a major problem that harms workers and causes noise pollution. Also,
Due to the high-speed rotation of the cutter, high frictional heat is generated when cutting the back of the bookbinding page bundle, and the adhesive applied in advance to the back of the page stack melts due to the high frictional heat and is fused to the cutting blade 2. Therefore, there was a problem in that the cutting efficiency was extremely poor. Furthermore, there is another problem in that the chips produced by the circular saw type cutter cannot be used as raw materials for recycled paper because they become powder.

On the other hand, in the thin blade type cutter shown in Fig. 8, the cutting blade 2 is made of a thin blade, so it generates intense vibration noise, and like the circular saw type cutter, it has only one cutting edge.
A large Paris will occur as shown in the figure. In order to prevent this, the motor had to be rotated at high speed, which caused the same significant noise as mentioned above.

In addition, the thin blades are easy to break and wear out quickly, so there are many parts to repair and the repair costs are high.Furthermore, the paper fibers become sticky and solidify due to frictional heat, which prevents glue from getting between the paper. There were some problems, such as it disappearing.

Furthermore, since the single blade only has the forward blade part,
The same noise problem as mentioned above occurs, and each blade fll'
Each v sheet had to be fixed to the cutter base, and a great deal of effort was required to adjust the fixing position and adjustment work.

In addition, in any of the above conventional cutters, it is necessary to fix each groove cutting blade to be attached to the back of the book to be bound into the mounting hole 5 drilled in the cutter base 1. Furthermore, since the positions of the groove cutting blades are different from the center of the cutter base 1, it is necessary to adjust the setting angle of each of the blade parts, and this work requires a considerable amount of time.

Furthermore, if the angle of the groove cutting blade is insufficiently adjusted, the gluing grooves may overlap, making it impossible to perform effective gluing.

This invention was made to solve this problem, and it is possible to smoothly cut the back of a bundle of bookbinding sheets without causing any creases, and the noise generated when the blade is cut is significantly reduced, thereby preventing any harm to the operator. It is an object of the present invention to provide a bookbinding cutter that can prevent pollution, etc., and that also eliminates the need for complicated adjustment of the cutter blade for carving glue grooves, and that can neatly form ideal multi-strip glue grooves. purpose.

[Means for solving problems]

The bookbinding cutter packaging according to the present invention is provided with a plurality of cutting blades at predetermined intervals, with blades extending outward and returning blades formed inside along the rotational direction of the cutter base.

Further, in a bookbinding cutter package according to another aspect of the present invention, a cutter base is provided with one groove cutting blade having a plurality of adjacent blade grooves.

[Effect]

In this invention, when a stack of paper for bookbinding is conveyed from one direction to the other to the cutter base in a rotationally driven state, the back of the paper stack is positioned at the outer edge of the cutting blade on the paper stack loading side of the cutter base. On the paper stack delivery side, the back of the paper stack is finished by a return blade with a diameter of 1 μm1 inside the cutting blade, and burrs are removed.

Further, in another invention of the present invention, a plurality of gluing grooves are formed on the back of the paper stack by one groove cutting blade on each of the paper stack input side and the paper stack output side of the cutter base. .

〔Example〕

Hereinafter, an embodiment of the present invention will be explained with reference to the drawings. Fig. 1 is a plan view of a cutter showing an embodiment of the invention, Fig. 2 is a view taken along the line ■-■ in Fig. 1, and Fig. 3 is a plan view of a cutter showing an embodiment of the invention. A plan view of the main parts of a cutter according to another embodiment of the present invention, FIG. 4 is an enlarged plan view of the main parts, FIG. 5 is a side view of the main parts, and FIG. 6 is a view of the back of the paper bundle. It is a figure which shows the state of the formed gluing groove, and in these figures, the same code|symbol is attached to the same or equivalent part as the said conventional cutter.

In FIG. 1, a plurality of cutting blades 2 are integrally formed at predetermined intervals along the outer peripheral edge of a disc-shaped cutter base 1.
As shown in the second diagram, each cutter base 1 rises at a constant height 1 from the outer peripheral edge of the cutter base 1.
It has a concentric ring arrangement.

As shown in the first diagram, the cutting blade 2 is formed such that the outer side along the outer periphery of the cutter base 1 is a forward blade part 2a, and the inner side is a return blade part 2b, and these forward blade part 2a and return blade are formed. In this embodiment, the cutting edge portion 2 is inclined as shown in the second figure.
The cutting edge angle of the blade a is set to 45° n, and the cutting edge angle of the returning blade portion 2b is set to 8°. Note that this cutting edge angle is not limited at all.

Reference numeral 6 denotes a cutting blade 7C provided on the cutter base 1, and this groove cutting blade 6 integrally has a shaft portion 7 that is fitted into the mounting hole 5. (A surface 7a is formed on the shaft 87. As shown in FIG. 8, a hole 7b into which a height adjustment rod (not shown) is screwed is formed in the shaft 87. The height of the groove cutting blade 6 is adjusted by manually moving a height adjustment rod (not shown) up and down.The groove cutting blade 6 is fixed as shown in FIGS. Then, it is screwed onto the cutter base 1 from the side wall surface, and the
This is done using a fixing screw 8 whose tip is in contact with a. As a result, as shown in FIGS. 3 and 4, the groove cutting blade 6 is attached and fixed in a state where it is necessarily positioned at an appropriate angle with respect to the line connecting the centers 1a and Y of the cutter base 1. In this embodiment, the mounting angle W of the groove cutting blade 6 is, for example, approximately 80° (this angle is not limited in any way). When a groove is formed on the back part, the groove cutting blade 6 described later is used.
Since the plurality of blade grooves 6a do not come into cutting contact with the back part all at once, and cut one piece at a time with an interval of one hour,
Glue grooves S can be formed smoothly. Further, since the groove cutting blade 6 is formed with a tapered surface 7a, it can be securely fixed with the fixing screw 8.

The groove cutting blade 6 has a rack blade structure having a plurality of blade grooves 6aY arranged next to each other at regular intervals along the appropriate installation angle line, and each blade edge angle is 1 as shown in the fifth figure.
For example, it is formed around α=80°. This angle is also not limited in any way.

Next, the operation of the above embodiment will be explained.

The cutter base 1 is attached to a rotary drive system and is driven to rotate at a low speed. In this case, the rotation speed is IUOORP
It is about M and is the era name.

A bundle of sheets P for bookbinding is conveyed from one direction to the other direction to the cutter base 1 in such a low-speed rotational driving state.

At this time, after the back of the paper bundle P is primarily cut by the forward cutting edge 2a on the outside of the cutting blade 2 on the carry-in side of the cutter base 1,
Secondary cutting is performed by the return blade section 2b on the unloading side.

Therefore, the back of the paper bundle P is finished by first cutting the ears and removing the edges by the second cutting.In addition, the back of the paper bundle P is finished by first cutting and second cutting as described above. 1, a grooved cutting blade 6
A plurality of glue grooves S (FIG. 6) are cut by f'L.

In this case, the glue groove S is 1g on both the cutter base 10 paper stack input side and output side! Formed one by one in an orderly manner.

It should be noted that such a cutting blade 6 may be provided on a cutter base exclusively for the cutting blade 6. Therefore, the labor of fixing the grooved blades one by one and adjusting the setting angle as in the conventional method can be greatly reduced. Also.

By synchronizing the speed at which books to be bound are fed to the cutter base 1 and the rotation speed of the cutter base 10, the grooves S can be ideally formed and noise can be significantly reduced.

〔Effect of the invention〕

As explained above, in this invention, the cutting blade provided on the cutter base has a going blade part on the outside and a returning blade part on the inside, so that the back of the bookbinding paper bundle is cut with the going blade part It is possible to finish by aligning and cutting with the return blade, and since the grooves of the forward and return blades are formed along the tangential direction of the cutter base rotation locus, cutting is possible. The resistance is also small, so that the cutter can be rotated at low speed to smoothly trim the back of the paper bundle, and the noise during the process can be significantly reduced, making it possible to prevent noise pollution and the like.

Further, in another aspect of the present invention, a rack-shaped groove cutting blade is provided in which a plurality of grooves are formed adjacent to each other at regular intervals, so that one groove cutting blade is formed on the back of the paper bundle. Multiple grooves with glue can be formed smoothly and orderly with the blade.

[Brief explanation of drawings]

FIG. 1 is a plan view of a cutter showing an embodiment of the present invention;
2 is a view taken along the line ■-■ in FIG. 1, FIG. 8 is a plan view of the main part of a cutter according to another embodiment of the present invention, and FIG. 4 is an enlarged plan view of the main part. Figure 5 is a side view of the same main part, Figure 6
The figure shows the state of the gluing grooves formed on the back of the paper bundle.
7 and 8 are plan views showing different conventional cutters, and FIG. 9 is a plan view of the back part. In the figure, 1 is a cutter base, 2 is a cutting blade, 2a is a forward blade part, 2b is a return blade part, 6 is a groove cutting blade, and 6a is a blade groove. Note that the same reference numerals in each figure indicate the same or corresponding parts.

Claims (3)

[Claims] (1) In a bookbinding cutter structure that integrally has a plurality of cutting blades that are arranged concentrically on a rotatably driven cutter base and trim the backs of paper bundles to be bound, each of the cutting blades is connected to the cutter base. A bookbinding cutter structure characterized in that a cutting edge goes outward and a returning edge goes inward along the contact direction of the base rotation locus. (2) For bookbinding according to claim 1, wherein the forward edge portion and the return edge portion of the cutting edge are formed in a tapered shape along a tangential direction of the cutter base rotation locus. Cutter structure. (3) The rotatably driven cutter base is provided with a groove cutting blade at an appropriate installation angle for forming a gluing groove on the back of a bundle of bound sheets, and the groove cutting blade is arranged at regular intervals in the direction of the appropriate installation angle. A bookbinding cutter structure characterized by having a rack configuration in which a plurality of blade grooves are formed in rows adjacent to each other.