JPH045096A - Bookbinding apparatus - Google Patents

Abstract

PURPOSE:To carry out bookbinding within a reduced time by mounting the heating member arranged in the vicinity of the support member supporting a cover member having a hot melt adhesive and an alternating magnetic field generating means generating an alternating magnetic field allowing the heating member to generate heat. CONSTITUTION:The support members 3a, 3b supporting a cover member 12 having a hot melt adhesive 22, the heating member 15 arranged in the vicinity of the support members 3a, 3b and an alternating magnetic field generating means 16 allowing the heating member 15 to generate heat are mounted. The hot melt adhesive 22 is interposed between the back parts of sheet materials P and the cover member 12 and melted by heating means 15, 16 and solidified to bond the back parts of the sheet materials P to the cover member 12. At this time, the heating member 15 is allowed to generate heat by the magnetic field generating means 16 to melt the hot melt adhesive 22. By reducing the thickness of the heating member 15, the heat capacity of the heating member 15 can be reduced and a heating time can be reduced and the productivity of bookbinding work can be enhanced to a large extent.

Description

DETAILED DESCRIPTION OF THE INVENTION (A) Industrial Application Field The present invention relates to a bookbinding device for binding sheet-like recording materials.
Specifically, for example, a hot-melt adhesive is applied to the folded part of a bookbinding member, the end of a bundle of recording materials is sandwiched in contact with the adhesive, the adhesive is melted by heating means such as a heater, and then heat is radiated. The present invention relates to a bookbinding device that binds books by solidifying the adhesive.

(B) Conventional technology Conventionally, in a bookbinding device that binds sheet materials by using melting and solidification of an adhesive, the heating means for melting the adhesive is a heating means such as a nichrome wire or a sheet-shaped heating element. It was composed of a heat generating plate that supports the heat generating means, holds a member to be bound, and transmits heat from the heat generating means, and an insulator that electrically insulates the heat generating means and the heat generating plate.

(c) Problems to be solved by the invention However, in the above-mentioned conventional example, the larger the sheet material to be bound, or the thicker the bundle of sheet materials to be bound, the wider the area of the heating plate. In addition, strength is required to hold the bookbinding member, and the plate is thick. As a result, the heat capacity of the plate increases, and the temperature required for bookbinding (approximately 15
It takes a long time to reach the temperature (0°C).

For this reason, with conventional heating means such as sheet heaters, bookbinding productivity is very poor when binding for the first time, and because the heating element generates a large amount of heat, it is necessary to add safety protection devices and replace the power supply device. The drawback was that the bookbinding equipment became larger due to the increase in electric power.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a bookbinding apparatus that can bind books in a short time by using a magnetic field generating means and a heat generating member that generates heat by the magnetic field generated by the means.

(:) Means for Solving the Problems The present invention has been made in view of the above circumstances, and includes, for example, Figures 1(b), 2(a), (b), and 3().
cl and FIG. 4 (bl), the cover member (1
2) and the sheet material (P) sandwiched between the cover member (12)
In a bookbinding device (1) that melts a hot melt adhesive (22) interposed between
3b), a heat generating member (15) disposed near the support members (3a, 3b), and an alternating magnetic field disposed near the heat generating member (15) and causing the heat generating member (15) to generate heat. The present invention is characterized by comprising an alternating magnetic field generating means (16) that generates an alternating magnetic field.

Further, the magnetic field generating means (16) may include a plurality of induction coils (
16).

Also, the excitation frequency of the magnetic field generating means (16) is 15~
It is characterized by being 18KHz, 30-38KHz, and 45-57KHz.

Further, the heat generating member (15) is characterized in that the end portion thereof is bent.

Moreover, the heat generating member (15) is made of different materials (23, 24).
).

Further, the heat generating member (15) is characterized by being plated or coated with a resin.

(f) Function Based on the above configuration, a hot melt adhesive (22) is interposed between the back of the sheet material (P) and the bookbinding member (12), and the hot melt adhesive is bonded by heating means (15, 16). The adhesive (22) is melted and then heat is radiated to solidify the hot-melt adhesive (22) and adhere the back of the sheet material (P) to the bookbinding member (12).

At this time, the heat generating member (15) is
generates heat to melt the hot-melt adhesive (22).

Note that the symbols in parentheses are for illustrative purposes only, and do not limit the answer structure.

(F) EXAMPLES The present invention will be described in detail below with reference to the drawings. Figure 1 (
In a) and (b), the bookbinding bag R1 is placed in the upper opening 2a of the rectangular main body frame 2 with guide plates 3a and 3b formed in a planar shape perpendicularly and parallel to each other, front and rear as shown by arrow A. They are arranged so as to be spaced apart from each other. In addition,
The guide plates 3a and 3b are made of a non-magnetic material such as plastic with excellent heat resistance.

A motor 4 for driving guide plates 3a and 3b is provided on the left side of the main body case 2, and a pinion 4a is meshed with a gear 5a of a torque limiter 5, and a pulley 6 provided on the torque limiter 5 is connected to the upper A belt 8 is stretched between the pulley 7 and a belt 10 is stretched between the pulley 7 and a pulley 9 facing the pulley 7.
Projections 11.11 provided at the left ends of the guide plates 3b and 3a are engaged with the upper and lower parts of the guide plates 3b and 3a.

When the motor 4 rotates forward, the pinion 4a, torque limiter 5, pulley 6, belt 8, pulley 7, belt 1
0, the guide plates 3a and 3b are in contact with each other along a guide (not shown) as described above, and the torque limiter 5 is connected to the guide plates 3a and 3b or the bookbinding member 1.
2 and the sheet material P are sandwiched between them, and when the pressure exceeds a predetermined value, the sheet material P will slip. When the motor 4 reverses, the guide plate 3a
, 3b move away.

Further, the guide plates 3a and 3b are provided with notches 13, and through these notches 13, light receivers 14b for detecting light from the light emitter 14a are provided facing each other.

In addition, iron, 18
- A heat generating member 15 made of a magnetic material such as stainless steel having a relative magnetic permeability of 50 or more is installed horizontally. An alternating magnetic field generating coil 16 is provided below this heat generating member 15,
A thermistor 17 that measures the temperature of the heat generating member 15 is attached to the heat generating member 15. In addition, the guide plate 3 is formed with high magnetic permeability ferrites (118a, 18b) or L-shaped to prevent the alternating magnetic field from leaking outside and causing electromagnetic interference.
a, 3b, and this ferrite material 18a
, 18b are arranged close to the upper back surface of the main body case 2.

Also, a variable resistor 19 measures the thickness of the bookbinding member 12 that holds the sheet material P in accordance with the movement of the guide plates 3a and 3b.
(See FIG. 5), and a control section 2o for controlling each of the electrical devices is also provided at the bottom of the main body case 2. Note that 21 is a display section.

Further, as shown in FIG. 2, the bookbinding member 12 has a bottom portion 1
A hot melt adhesive 22 made of a hot melt adhesive, a PE adhesive, a styrene adhesive, an acrylic adhesive, etc. and having a melting point of 70 to 200°C is applied to the adhesive 2a.

The thickness of the bundle of sheet materials P is approximately 3 to 50 mm.

Note that the bookbinding member 12 generally serves as a cover for a bundle of sheet materials P, or may include only the bottom portion 12a and the adhesive 22. Further, the bookbinding member 12 and the solid adhesive 22 may be separate bodies.

Next, the heat generating member 15 will be explained with reference to FIG.

As described above, the heat generating member 15 is made of a magnetic material such as iron or 18-8 stainless steel, and has a relative permeability of 50 or more at the excitation frequency during induction heating, and a skin resistance of 3X10.
``Magnetic materials with a resistance of Ω or higher can be used.

Further, in order to prevent the heat generating member 15 from rusting, increase its strength, and improve its appearance, a nickel-chromium plating with a thickness of 100 μm or less that can withstand high temperatures or a Teflon resin coating that is resistant to dirt is used.

Further, deformation during heat generation can be prevented by using a flat plate as shown in FIG. 3(a) or by making the cross section into a U-shape as shown in FIG. 3(b). This is because if the heat generating member 15 is deformed, the distance between the heat generating member 15 and the hot melt adhesive 22 will not be uniform, and heat transfer will not be uniform.

In addition, as shown in FIG. 3(c), a heat generating member 15 is formed by integrally bonding a plurality of 18-〇 stainless steel heat generating members 24 to a heat conducting member 23 made of aluminum, copper, magnesium, etc. with excellent thermal conductivity. can also be used to prevent deformation due to differences in thermal expansion coefficients and to correct heat generation distribution due to non-uniform induced magnetic fields. In addition, when the heat conductive member 23 is bonded, sufficient heat generation performance can be obtained even when the thickness of the heat generation material 24 is set to 0.5 cm or less.

Next, the alternating magnetic field generating coil 16 will be explained with reference to FIG. 4.

The alternating magnetic field generating coil 16, as shown in FIG. 4(a),
2 wires made by twisting about 16 copper wires with a diameter of 0.4 mm
Twice the camellia is formed.

Further, as shown in FIG. 4(b), in another example, a plurality of coils 16 are connected in series.

In both of the above two embodiments, the oscillation frequency is 10KH.
z~60KHz, in this example, especially 15~1
9KHz, or 30-38KHz, or 45-57
The KHz version had good bookbinding performance.

Next, the control block diagram shown in FIG. 5 will be explained.

Electric power controlled by a resonance output control circuit that controls electric power in the control section 20 is supplied to the alternating magnetic field generating coil 16.

Then, by blocking the light beam of the light emitter 14a,
When the insertion (setting) of the bookbinding member 12 is detected, the control unit 20 sends a signal to the motor driver 25 to cause the motor 4 to move the guide plates 3a, 3b closer together. The thickness of the bookbinding member 12 is measured based on the resistance value signal of the variable resistor 19, and when the torque limiter 5 slips and the resistance value of the variable resistor 19 stops changing, the motor 4 is stopped.

Then, the control unit 20 sets a timer for the energization time to the coil 16 according to the resistance value signal of the variable resistor 19, and also prevents the temperature of the heat generating member 15 from exceeding a predetermined temperature (150° C.) according to the signal from the thermistor 17. like coil 1
The power supply to 6 is controlled.

When the set heating time is reached, a buzzer 26 notifies the user of completion. Further, the time set on the timer is displayed on the display section 21.

Next, the operation of this embodiment will be explained with reference to the flowchart of FIG.

When the outlet 27 is connected to the power source, the control unit 2o operates the motor driver 25, and the motor 4 sets the guide plates 3a, 3b to the initial state where they are opened (Ste
p1).

Then, the bookbinding member 12 is inserted between the guide plates 3a and 3b, and the bookbinding member 12 waits in the initial state until the light reception by the light receiver 14b is interrupted. (Step 2).

Next, when the bookbinding member 12 is detected, the motor 4 brings the guide plates 3a and 3b closer together (step 3).

The resistance signal of the variable resistor 19 becomes constant (Step 4)
Then, motor 4 stops (Step 5). Also,
The energization timer for the coil 16 is set in response to the resistance signal of the variable resistor 19, that is, the heating time timer is set (St
ep6). At the same time, the timer time is displayed on the display section 21 (Step 7). At the same time, the coil is energized,
Heating is started.

In this embodiment, the thickness of the bookbinding member 12 is 5 to 15 mm.
The timer setting is 20 seconds for 15 to 20 mm, 30 seconds for 20 to 50 mm, and 40 seconds for 20 to 50 mm.

During dielectric heating, the light receiver 14b constantly monitors whether the bookbinding member 12 has been pulled out from between the guide plates 3a and 3b, and if it has been pulled out, the current to the coil 16 is stopped and initialization (Ste pl) (Step 8
).

Until the heating time is reached (Step 9), the energization to the coil 16 is controlled by the signal from the thermistor 17 so that the temperature of the heat generating member 15 is maintained at 150°C (Step 9).
).

When the set heating time is reached, the work completion buzzer 26 will sound.
The bookbinding member 12 waits for the bookbinding member 12 to be removed (Step 2).

When the bookbinding member 12 is removed, a series of bookbinding operations are completed.
Return to initialization (Step).

(G) As described in detail, according to the present invention, the heat generating member is heated by induction by the alternating magnetic field generating means, and the heat generating member is heated by the skin effect, so that the thickness of the heat generating member can be reduced. By making it thinner, the heat capacity of the heat generating member can be reduced. the result,
The heating time is reduced and the productivity of bookbinding work is greatly improved.

Further, by forming the alternating magnetic field generating means into a plurality of induction coils, the hot-melt adhesive can be uniformly heated.

In addition, the excitation frequency of the alternating magnetic field generating means is set to 15 to 18 KH.
By limiting the frequency to 30 to 38 KHz and 45 to 57, safety and efficiency can be improved.

In addition, by bending the end of the heat generating member, the heat-melting adhesive can be uniformly heated to improve the surface accuracy of the heat generating member, thereby increasing the uniformity of the bookbinding work and increasing work efficiency. can.

Furthermore, by integrating a plurality of heat-generating members into a composite body made of different materials, for example, a material with good thermal conductivity and a plurality of heat-generating members, uniform heating can be achieved and the uniformity of the bookbinding operation can be improved.

Further, by plating or resin coating the heat generating member, the bookbinding device can be maintained beautifully and its life can be extended.

[Brief explanation of the drawing]

FIG. 1(a) is a cross-sectional side view of the present invention, FIG. 1(b) is a perspective view thereof, FIG. 2(a) is a perspective view of the bookbinding member thereof, and FIG. 2(b) is the sheet material thereof. 3(a) is a perspective view of the heat generating member, FIG. 3(b) is a perspective view of its first modification, and FIG. 3(c) is its second modification, FIG. 4(b) is a perspective view of the alternating magnetic field generating coil, FIG. 5 is a control block diagram of this embodiment, and FIG. 6 is a flowchart thereof. 3a, 3b... Supporting member (Ga 12... Book binding member 15... Source 16... Alternating magnetic field generating means (Inductor 22... Hot melt adhesive 4... Material (thermal conductive member, 23.2 Figure 3 (a) (b) (C) Figure 5 Figure 4 (a) (b)

Claims (1)

[Claims] 1. In a bookbinding device that melts a hot melt adhesive interposed between a cover member and a sheet material sandwiched between the cover member, the cover member having the hot melt adhesive is A support member for supporting, a heat generating member disposed near the support member, and an alternating magnetic field generating means disposed near the heat generating member for generating an alternating magnetic field that causes the heat generating member to generate heat. A bookbinding device characterized by: 2. The bookbinding apparatus according to claim 1, wherein said alternating magnetic field generating means comprises a plurality of induction coils. 3. The excitation frequency of the magnetic field generating means is 15 to 18 KHz.
, 30 to 38 KHz, and 45 to 57 KHz.
The bookbinding device described. 4. The bookbinding apparatus according to claim 1, wherein the end portion of the heat generating member is bent. 5. The bookbinding apparatus according to claim 1, wherein the heat generating member is made of different materials. 6. The bookbinding apparatus according to claim 1, wherein the heat generating member is plated or coated with a resin.