JPH0522598B2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a small-sized bookbinding device for binding a plurality of sheets to create a bound book such as a book, and in particular, relates to a small-sized bookbinding device for binding a plurality of sheets to create a bound book such as a book. The present invention relates to a bookbinding device that facilitates bookbinding using thermo tape.

(Prior art) Generally, when binding copies of documents, etc., fixing materials such as staples are often used, but many other methods are also used, such as hole-punch binding and wireless binding using adhesive. .

However, when officially creating something like a regular report, the front cover, back cover, and spine are attached together using hot melt adhesive, and the title, etc. is printed on it. It is generally done to increase the
In this case, if bookbinding is attempted simply using a hot melt adhesive, it will take time and effort to apply the adhesive, and furthermore, additional processing will be required.

Therefore, recently, as shown in Japanese Patent Application Laid-Open No. 58-98377, an adhesive bonding member for bookbinding, which is thermo tape coated with hot melt adhesive in advance, has been used to attach the front and back sides of sheets, etc. Increasingly, the edges of a bound book made by joining the covers together and the spine are being glued together.

As a device for binding books using such an adhesive bonding member for bookbinding,
The one shown in Publication No. 16375 is often used.

The bookbinding apparatus shown in the conventional example described above has a configuration as shown in FIG. It is formed by a book binding guide 12 provided at a position and a pair of clamp arms 8, 8a provided facing each other.
The clamp arms 8, 8a reciprocate in the direction of clamping and releasing the bound product 7, and
It is provided so as to be movable in the vertical direction, and acts to press the bound product 7 downward while holding it therebetween.

Further, below the bound product holding member 11, left and right pressure plates 14, 15 are provided via a movable plate 13.
and a lower pressure plate 16 are provided, and each of these three pressure plates 14 to 16 has a built-in heater.

When binding a book using this bookbinding device 10, first, the binding object 7 is inserted into the binding object guide 12 consisting of a pair of opposing guide members, and placed on the movable plate 13. Then, clamping is performed using clamp arms 8, 8a from both sides.
Next, thermo tape 17 is set on a pair of left and right pressure plates 14 and 15 that are set apart from each other, and the movable plate 13 is pulled to the right in the figure, with the bound product 7 being held between the clamp arms. lower it.

When the bound article 7 is lowered while being held by the clamp arms 8, 8a, the thermo tape 17
With both sides thereof bent, the spine of the bound article 1 comes into contact with the hot melt adhesive 18 formed in the center thereof, and is pressed onto the pressure plate 16 below.

Next, the heater of the lower pressure plate 16 is energized, and the hot melt adhesive 18 of the thermo tape 17 is applied.
by melting and adhering the sheets of the bound product 1 to each other,
Thermo tape 17 is attached as a back cover.
After that, the left and right pressure plates 14 and 15 are moved toward the lower part of the bound article 1, and while pressing both sides of the thermo tape 17 against the lower part of the bound article 7, the thermo tape 17 is heated by a heater, and the thermo tape 17 is heated by a heater. 17 adhesion and bookbinding are completed.

However, in most conventional devices, the heating temperature etc. are set to be constant depending on the characteristics of the hot melt adhesive applied to the thermo tape; Some devices are configured so that the heating time can be changed manually before bookbinding.

However, the heating temperature of the hot melt adhesive in bookbinding equipment is easily affected by the surrounding temperature, etc.; for example, the heating temperature of the hot melt adhesive in bookbinding equipment is the same when the temperature is low and when the temperature is high, such as in the summer. Even when heated, the degree of melting of hot melt adhesives often varies.

When binding is performed during the cold winter season or in a place with a low temperature, the temperature of the bound material is low according to the temperature, so the heating temperature of the hot melt adhesive is slow to rise, and the heating temperature is low. Disadvantages include the fact that the hot melt adhesive is not completely melted due to the low temperature, which reduces the amount of adhesive that penetrates between the sheets, resulting in incomplete binding and defective binding. is likely to occur.

Also, if you bind books during the summer when the temperature is high,
Due to the high temperature of the product, the heating temperature of the hot melt adhesive rises quickly, and therefore the hot melt adhesive is heated at high temperature for a long time, which may cause the hot melt adhesive to melt excessively. Various disadvantages arise, such as the possibility of adverse effects caused by such factors.

(Problems to be Solved by the Invention) The present invention maintains the hot melt adhesive at a constant level of softness by adjusting the heating temperature of the hot melt adhesive according to the ambient temperature, thereby ensuring complete adhesion. It is an attempt to make it possible to
The purpose is to prevent bookbinding defects from occurring due to changes in temperature.

(Means and effects for solving the problems) The present invention includes a plurality of temperature detection switches that operate according to a set temperature in a power supply circuit that supplies power to a heater formed on a pressure plate of a bookbinding device. A temperature detection circuit formed in parallel is provided, and a heater temperature control circuit is connected to the temperature detection circuit. and,
The temperature detection switch operates according to the ambient temperature, and the temperature detection circuit operates according to the ON-OFF output of the switch.The heater temperature control circuit operates according to the output, and the current supplied to the heater is activated. Control. Therefore, the heating temperature of the heater is changed according to the air temperature, the degree of melting of the hot melt adhesive of the thermo tape is kept constant, and the occurrence of binding defects can be prevented.

(Example) As shown in FIG. 1, the device of the present invention has a temperature detection section 1 connected to a power source, and a plurality of ON/OFF switches 2 and 3 formed in parallel. Then, the output of the temperature detection section 1 is input to the temperature detection circuit 4, and the output is input to the heater temperature control circuit 5, and the heating temperature of the heater 6 is set.

In this case, as the switches 2 and 3 provided in the temperature detection section 1, other than a thermostat or a thermistor, an appropriate temperature detection member can be used. For example, when a thermostat is used, this The thermostat is composed of two types with different characteristics. Therefore, in this example, switch 2 operates at 10°C.
and a switch 3 that operates at 25℃, so two ON-
The OFF output signals are respectively input to the temperature detection circuit 4.

The temperature detection circuit 4 compares the two signals as shown in FIG. 2, outputs the comparison result, and inputs it to the heater temperature control device 5.

Next, in the heater temperature control circuit 5, the third
As shown in the figure, the current supplied to the heater 6 is changed according to the preset relationship between the air temperature and the heating temperature. As shown in the example shown in Figure 3, when the air temperature is below 10°C, the temperature of the heater 6 is set to 220°C, and when the air temperature is between 10 and 25°C, the heating temperature of the heater is set to 200°C. At the same time, when the air temperature is 25°C or higher, the heating temperature of the heater is controlled to 190°C.

In addition, the bookbinding apparatus of the present invention includes a pressure plate for heating the thermo tape by pressing it from below as shown in FIG. The power supply to the heaters provided on the left and right pressure plates is controlled according to the surrounding temperature, that is, the air temperature.

Therefore, in the bookbinding apparatus of the present invention, the hot melt adhesive of the thermo tape is prevented from melting excessively by heating according to the heat held by the bound product, and furthermore, the hot melt adhesive of the thermo tape is By melting the hot melt adhesive appropriately, the hot melt adhesive penetrates between the sheets of the bound product, thereby bonding each sheet in good condition.
The binding is done in such a way that the sheets do not fall off after binding, and the thermo tape functions perfectly as a spine.

Furthermore, the thermo tape used in the bookbinding apparatus of the present invention is similar to the conventional example disclosed in Japanese Patent Application Laid-Open No.
An adhesive similar to that shown in Publication No. 98377 can be used, but in addition to that, the hot melt adhesive applied to the thermo tape can be replaced with a thick hot melt adhesive that is in contact with the spine of the bound product,
It is also possible to bond the thermo tape in good condition even by using two types of thickness, ie, a thin hot melt adhesive that is bonded to the side of the bound product.

Furthermore, in the present invention, it is also possible to control the temperature of the heater for heating the pressure plate of the bookbinding device depending on the type of thermo tape or hot melt adhesive used for bookbinding. Therefore, by increasing the number of switches constituting the temperature detection section, it becomes possible to easily control the heating temperature of the heater in finely divided steps of, for example, 10 degrees Celsius.

Although the present invention has been described above based on the embodiments shown in the drawings and the embodiments not shown, the present invention is not limited to the embodiments described above, and the present invention is not limited to the embodiments described above. It is a matter of course that the design can be changed freely as necessary within the range.

(Effects of the Invention) Since the present invention is constituted by the control member as described above, it is possible to set the melting temperature of the hot melt adhesive to an appropriate value depending on the ambient temperature of the bookbinding device. .

By controlling the heating temperature of the hot-melt adhesive, the degree of melting of the hot-melt adhesive is maintained constant, and the hot-melt adhesive appropriately penetrates between the sheets of the bound material, thereby creating a bond between the sheets. By doing so, it is possible to completely prevent the occurrence of binding errors, etc., and to obtain sufficient binding strength.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of a control device used in the bookbinding apparatus of the present invention, FIGS. 2 and 3 are tables showing control examples in a temperature detection circuit and a heater temperature control circuit, and FIG. , is an explanatory diagram showing the configuration of a conventional bookbinding apparatus. Symbols in the figure: 1...Temperature detection unit, 2, 3...Switch, 4...Temperature detection circuit, 5...Heater temperature control circuit, 6...Heater, 7...Binding product, 8...
Clamp arm, 10...Book binding device, 11...Bound product holding member, 12...Bound product guide, 14-16
... Pressure plate, 17 ... Thermo tape, 18 ... Hot melt adhesive.

Claims (1)

[Claims] 1. In a bookbinding device that uses thermo tape coated with hot melt adhesive to stiffen the spine of a bound book, there is a temperature detection circuit that detects the temperature in multiple stages, and a heating plate 1. An automatic bookbinding temperature control device, characterized in that a control circuit for setting the heating temperature of a heater is connected to the device, and the heating temperature of the heater can be automatically set as a value inversely proportional to the air temperature.