JPH0517260Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a heater in a bookbinding device, and in particular, it is capable of reliably side-sealing a binding tape to a bound object, and also maintains a good finish after binding. The present invention relates to a bookbinding device that can be held in place.

(Prior art) In a conventional bookbinding device, multiple copies or sheets are held from both sides, and a bookbinding tape is applied to cover the bottom surface and the lower portions of both sides and then heated. Bookbinding is performed by melting hot melt adhesive applied to the bookbinding tape.

Regarding this type of bookbinding device, for example,
There are bookbinding apparatuses as disclosed in Japanese Utility Model Publication No. 53-16735, Japanese Utility Model Publication No. 55-18216, and the like. In these bookbinding apparatuses, a cam device is used to move a clamp for clamping the bound work, and the bookbinding tape is bonded while the clamp is held at a constant pressure.

In the example shown in Japanese Patent Publication No. 53-16735 mentioned above, a complicated mechanism using a link and a cam device is used as a moving mechanism of the clamp. , a clamp is moved using a cam member rotated by a motor.

In addition, in order to melt the hot melt adhesive of the binding tape and adhere it to the bottom and side surfaces of the binding tape, heaters that are configured to be pressed against the binding tape from both sides are conventionally used. A mechanism is used in which the hot-melt adhesive of the bookbinding tape is first melted by a heater, and then the tape is pressed from both sides to adhere to the sides of the bound item.

The specific configuration of the bookbinding apparatus will be explained based on FIGS. 7 and 8. As shown in Fig. 7, in the main body of the bookbinding machine,
A pair of clamps 5, 5a are provided to clamp the bound product 16, and these pair of clamps 5, 5a are moved in the direction of the arrow to clamp the bound product 16 and position it.

Further, the lower part of the pair of clamps is composed of a bookbinding tape holding member formed by tape guides 7 and 7a provided with substantially U-shaped holding portions facing each other, heaters 11 and 13, and a book crest 15. A heater unit is provided.

Then, the bound object 16 is held between clamps, the binding tape is inserted into the binding tape holding section, and the hot melt adhesive of the binding tape is heated and melted by one of the heaters 13. After that, as shown in FIG. As shown, the adhesive end of the bound book 16 is pressed toward the bookbinding tape, and while the adhesive surface is pressed against the book crest 15, heaters 11, 1 are applied from both sides.
3 performs heating and pressing to perform bookbinding work.

(Problems to be Solved by the Invention) However, in the conventional device as described above, the respective pressing surfaces 11 of the pair of heaters 11 and 13 that are pressed from both sides of the adhesive surface of the bound product are
a, 13a are formed in a straight line, and a slight distance t is provided between the lower surfaces of the pair of heaters 11, 13 and the upper surface of the bookrest 15.

Therefore, during bookbinding, when the hot melt adhesive of the book binding tape is melted and pressed by a pair of heaters, the melted hot melt adhesive is pushed out toward the space t, as shown in FIG. As a result, the corner portions of the bookbinding tape 20 may swell to form an enlarged portion B, which may make the bound product look unsightly.

Also, depending on the condition of the bound product, the melted hot melt adhesive may
The adhesive may overflow from the end of the finished part of the binding tape 20, staining the cover, or the overflowing adhesive may adhere to the heater part of the device and be heated by the heater. This may cause inconvenient conditions such as the generation of smoke.

In addition, if the bottom edge of the sheet of the bound product is curled, the hot melt adhesive will not be able to reach the rising edge of the binding tape sufficiently, resulting in the formation of a gap C where no adhesion will occur, resulting in incomplete binding. It has disadvantages such as the fact that

(Purpose of the invention) The present invention solves the above-mentioned drawbacks of the conventionally used devices.By forming a stepped portion at the bottom of the pressing surface of the heater, the bookbinding tape can be easily applied to the binding material. The purpose of the present invention is to provide a device that prevents the molten hot melt adhesive from overflowing and the formation of non-adhered areas when bonding the product, and allows the production of bound products in good condition. There is.

(Means and effects for solving the problem) The bookbinding device of the present invention presses a plurality of sheets to form a bound product from both sides, and heats the binding portion using a band-shaped bookbinding tape. The present invention relates to a device configured to adhere.

In the present invention, in order to sandwich the lower side of the bound product from both sides with a binding tape interposed therebetween, and to perform a heating action on the binding tape, a pair of heaters on both sides can be connected and separated while sandwiching the bound product. established,
A stepped portion acting as a pressing surface is formed in the length direction of the tape at the lower part of each of the clamping surfaces of the pair of heaters that are in contact with the bound material, and the stepped portion is formed on the upper surface of the heater that is in contact with the bound material. The bookbinding tape is configured at a position that is set back by a predetermined distance, and the stepped portion is configured as an allowance for melting the hot melt adhesive of the bookbinding tape.

Therefore, in the bookbinding apparatus of the present invention, when pressing from the side of the bound workpiece with the heater, even if the molten hot melt adhesive overflows to the side of the bound workpiece, the step at the bottom of the heater can be removed. With the margin formed by the section, the product is molded to a predetermined thickness, and the appearance of the bound product can be maintained well.

In addition, even if the sheet is curled at the position where it touches the bookbinding tape, the adhesive that fills the adhesive area is adjusted by the stepped part, so there will be no defective areas in the binding tape, and the bookbinding tape will not adhere properly. This prevents problems such as bulges from occurring on the spine of the bound product after it has been printed. Then, it is possible to obtain a bound product in good condition, and since the hot melt adhesive does not overflow, it is possible to prevent an inconvenient situation such as staining the apparatus from occurring.

(Example) The configuration of the bookbinding apparatus of the present invention will be described according to the illustrated example.

FIG. 1 shows a bookbinding apparatus to which the heater of the present invention is applied. In this bookbinding device, a pair of page guides 6, 6a are provided on the top surface of the bookbinding device main body 1 in a state that they can be separated from each other.
Clamp them to the bottom of the page guide 5, 5a
The clamps 5, 5a are moved toward or away from each other via the wire 3 by rotating the handle 2.

By inserting the workpiece 16 from above and rotating the handle 2 in the direction of the arrow, the workpiece 16 can be held in a sandwiched state by the clamps 5, 5a.

A bookbinding tape holding member constituted by tape guides 7 and 7a is provided at the lower part of the clamping portion by the clamp, and the holding member holds the wire 3.
are interlocked in the directions of moving toward and away from each other.

Further, the bookbinding tape holding member is moved apart in conjunction with the movement of the clamp, and the interval between the clamps 5 and 5a is adjusted so that the size of the bookbinding tape can be set in accordance with the thickness of the bound product. is set, positioning is performed in accordance with the preset width of the bookbinding tape.

A heater unit 10 surrounded by a chain line is provided at the bottom of the bookbinding tape holding section. This heater unit 10 includes a pair of heaters 11 and 13.
and a bookrest 15 provided with a heating means.During the bookbinding operation, the heater unit 10 is moved up and down, and heaters 11 and 1 provided inside the heater unit are used.
3 in conjunction with each other in the left and right direction.

Then, by pressing the heater against the bottom surface and both sides of the binding material, the binding tape 20
The hot melt adhesive is melted to adhere the lower surface and both side surfaces of the bound article 16.

Step portions 12 and 14 are formed on the pressing surfaces of the heaters 11 and 13 of the present invention so as to face each other, respectively. This situation is explained in more detail in FIG. As shown in FIG. 2, the heaters 11 and 13 of the present invention have stepped portions 12 and 13, respectively, facing the lower portions of the holding surfaces 11a and 13a, which are provided facing each other so as to sandwich the bound product. 14 are provided. The step portions 12 and 14 provided on the clamping surfaces of the heater are formed so as to be set back from the surfaces of the clamping surfaces 11a and 13a by a distance t, and the distance t is a relatively small step of about 0.5 to 1.0 mm. Constructed as a small thing. Moreover, when the thickness of the heater is H, the stepped portion can be formed at a position approximately 1/2 from the lower surface.
Note that the thickness of the heater can be configured to be smaller than 1/2 of the maximum width of the bookbinding tape 20 specified for use in the bookbinding apparatus.

Therefore, when holding a bound product, the third
As shown in the figure, the upper part of the rising part of the bookbinding tape 20 is pressed by the clamping surfaces 11a and 13a, but a slight gap is formed at the stepped parts 12 and 14. The gap portion is covered with bookbinding tape 20.
This is the part where a large amount of hot melt adhesive is present, and by holding that part loosely, the molten hot melt adhesive is dispersed throughout the bonded part, and the edges of the sheets that make up the bound product are bonded. and,
The binding tape and the binding material can be bonded together in a good manner. Further, as shown in FIG. 3, a gap d is formed between the top surface of the book crest 15 and the heaters 11 and 13;
The gap may be, for example, as shown in FIG.
The gap is not formed as a very large gap, but is formed as a very narrow gap that does not allow the two members to directly slide.

Next, the bookbinding tape used in the bookbinding apparatus of the present invention will be explained based on FIG. The bookbinding tape 20 used in the present invention has a similar structure to conventionally used bookbinding tapes, and has a layer of hot melt adhesive 22 with a predetermined width on the upper surface of a base paper 21 made of paper or the like. is formed. In addition, a thin layer of hot melt adhesive is applied to both sides of the hot melt adhesive 22, but that part merely serves to adhere the rising part of the bookbinding tape to the side surface of the bound product. It is established to carry out the following.

Bookbinding tapes with the above configuration are usually formed in three widths: 30 mm, 45 mm, and 55 mm, so select the bookbinding tape according to the thickness of the bound product and attach it to the bookbinding device. It's becoming like that.

Therefore, in the bookbinding device shown in Figure 1, when setting the spacing of the bookbinding tape holding members after clamping the book to be bound, a tape guide setting device (not shown) is used to set the spacing of the tape guides in accordance with the thickness of the book to be bound, and a binding tape of a specified width is inserted.

The bookbinding operation of the bookbinding apparatus of the present invention using the heater having the above-described configuration will be described. In the bookbinding apparatus shown in FIG. 1, a bound object 16 is inserted between the page guides 6 and 6a, and its adhesive end is set on the heater 13. Thereafter, the handle 2 is rotated, and the clamps 5, 5a press and hold the bound product from both sides.

In this state, the interval between the tape guides 7, 7a is set, the heater unit 10 is lowered, and the size of the bookbinding tape 20 is displayed. Following the instructions, the operator inserts the binding tape of the specified size and presses the activation switch.
A heater 13 is brought into contact with the lower surface of the bookbinding tape to melt the hot melt adhesive.

After the hot melt adhesive is heated by the heater 13 for a predetermined period of time, the heater 13 is moved to the left side in the figure, the heater unit 10 is raised, and the bookbinding tape 20 is brought into contact with the top surface of the book crest 15. , the binding tape is pressed against the lower surface of the binding object 16. The hot-melt adhesive melted in this state not only adheres the ends of the sheets of the bound product to each other, but also adheres the bound material and the bookbinding tape.

Next, the heaters 11 and 13 on both sides are moved in a direction to sandwich the bound book, bending the sides of the binding tape, and releasing a portion of the melted hot melt adhesive and the hot melt adhesive thinly applied to the base paper. It acts as a side seal.

In this case, the upper part of the rising part of the bookbinding tape is strongly pressed, so even if there is a large amount of melted hot melt adhesive, the adhesive is evenly distributed in the margin formed by the stepped part. This prevents the liquid from overflowing to the top of the seal.

By performing a pressing operation using the heaters 11 and 13 for a predetermined period of time, the binding tape is adhered to the end of the bound product, and the bound product is completed as a book.The handle 2 is then rotated in the opposite direction. The binding operation is completed by releasing the clamping and taking out the bound work.

The heater of the present invention can be configured not only as shown in FIG. 2 but also as shown in FIG. 5. In this embodiment, taking the heater 11 as an example, a large stepped portion 12 is formed in the heater 11, a movable piece 12a is provided in the stepped portion 12, and a movable piece 12a is provided behind the piece 12a. A spring 12b is provided at the portion, and the spring 12b urges the top 12a in the direction of the pressing surface.

Therefore, when bookbinding is performed by holding a bound workpiece between the two, the frame 12a moves back depending on the thickness of the hot melt adhesive layer, thereby forming a gap t. This gap t can be set to any size by adjusting the force of the spring 12b, and when performing side sealing, the gap t can be arbitrarily set according to the amount of hot melt adhesive. This makes it possible to change the pressure, and also makes it possible to reliably press the upper part of the rising portion.

(Effects of the invention) Since the bookbinding device of the invention has the above-described configuration, it is possible to accurately form the corners of the binding tape on the spine, and it is possible to produce bound products with good appearance. It becomes possible to obtain. In addition, according to the device of the present invention, even for thin bound books, the adhesive is distributed with a uniform thickness in the margin formed by the stepped portions provided on the heaters on both sides, and the adhesive is distributed on the sides of the binding tape. Since the hot melt adhesive does not overflow from the sealed portion, it is prevented from staining the heater, etc. Furthermore, since the pressing surface of the heater accurately presses the upper part of the rising portion of the bookbinding tape, sealing defects will not occur.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram showing the configuration of a bookbinding apparatus to which the present invention is applied, and FIG. 2 is a side view of the heater of the present invention.
Fig. 3 is an explanatory diagram for bookbinding work, Fig. 4 is a sectional view of the bookbinding tape used in the present invention, and Figs. 5 and 6 are illustrations showing other embodiments of the heater of the present invention, respectively. 7 and 8 are explanatory views showing the configuration of a conventional bookbinding device, respectively.
10 and 10 are explanatory diagrams each showing a bookbinding state by a conventional apparatus. Symbols in the diagram: 1...Bookbinding machine body, 2...Handle, 3...Wire, 5...Clamp, 6...Page guide, 7...Tape guide, 8...Wire,
10... Heater unit, 11, 13... Heater, 11a, 13a... Pressing surface, 12, 14...
Step portion, 15...Book crest, 16...Bound book, 20...Binding tape, 21...Base paper, 22...
...hot melt adhesive.

Claims (1)

[Claims for Utility Model Registration] In an apparatus configured to press a plurality of sheets to form a bound book from both sides and thermally adhere them to the binding portion using a band-shaped bookbinding tape, A pair of heaters on both sides are provided so as to be separable from each other so as to sandwich the bound work in order to sandwich the lower side surface of the bound work from both sides via a bookbinding tape and to perform a heating action on the bookbinding tape. A stepped portion that acts as a pressing surface is formed in the length direction of the tape at the lower part of each clamping surface that contacts the bound workpiece of the heater, and the stepped portion is set at a predetermined position with respect to the upper surface that contacts the bound workpiece of the heater. 1. A bookbinding apparatus, wherein the bookbinding apparatus is configured to be set back by an interval of , and the stepped portion is configured as an allowance for melting a hot melt adhesive of a bookbinding tape.