JPH045092A - Bookbinding apparatus - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Industrial Application Field The present invention relates to a bookbinding device for binding sheet materials, and more specifically, a hot-melt adhesive is applied to the folded portion of a cover member, and the adhesive is applied to the sheet material. The present invention relates to a bookbinding device that binds a book by sandwiching the ends of a bundle so that they touch each other, melting the adhesive using heating means such as a heater, and then radiating heat to solidify the adhesive.

(■) Conventional technology Conventionally, in a bookbinding device that binds sheet materials using melting and solidification of adhesive, the heating means for melting the adhesive is a heating means such as a nichrome wire or a sheet-like 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 body and the heat generating plate.

(c) Problems to be Solved by the Invention However, in the conventional example described above, the larger the sheet material to be bound or the thicker the bundle of sheet materials to be bound, the larger the area of the heating plate in particular becomes. 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 00C).

For this reason, with conventional heat generating means such as sheet heaters, bookbinding productivity is very poor when binding for the first time, and the amount of heat generated by the heating element is large, so it is necessary to add safety protection devices and to With the increase in power, the bookbinding device had to become larger.

Furthermore, since the adhesive receives heat from the heating element through the cover material, it is not possible to use a material with poor thermal conductivity or a material that is sensitive to heat as the cover material.

Furthermore, even if the cover material is made of regular paper, the heat conduction rate changes depending on its thickness and material, so in order to accommodate various types of paper and ensure the adhesive melts, a long bonding time must be set. There was a problem.

Therefore, in the present invention, by laminating a magnetic plate heated by an electromagnetic induction heating device on the hot-melt adhesive of the cover member,
It is an object of the present invention to provide a bookbinding device that can perform bookbinding using small amounts of energy without being restricted by the thickness or heat resistance of a cover member.

(d) Means for Solving the Problems The present invention has been made in view of the above-mentioned circumstances, and when shown with reference to FIGS. 1, 3 and 6, the cover member
The hot melt adhesive (2) interposed on the back (12a) of
2), a support member (1) that supports the cover member (12) has a magnetic plate (17) that generates heat by an alternating magnetic field to heat and melt the hot-melt adhesive (22). 3a, 3b, 15) and the support member (3a
, 3b, 15) and a plurality of alternating magnetic field generating coils that generate the alternating magnetic field.

Further, a portion adjacent to the coil (16) is connected to the magnetic plate (17).
) overlap each other in the width direction.

(Phantom effect) Based on the above structure, the hot-melt adhesive (22) interposed between the back of the sheet material (P) and the back (12a) of the cover member (12) is melted, and then heat is radiated. , the hot-melt adhesive (22) is solidified to adhere the back of the sheet material (P) to the back (12a) of the cover member (12).At this time, the support member (3a) that supports the cover member (12) is ,3b,
The alternating magnetic field generating coil (16) is arranged close to the alternating magnetic field generating coil (15).
) generates heat, the magnetic plate (17) interposed between the cover member (12) and the sheet material (P) generates heat, melts the hot-melt adhesive (22), and melts the sheet material. After the spine of the sheet material (P) and the spine (12a) of the cover member (12) are fused together, the edges of the sheet material (P) and the spine (12a) of the cover member (12) are solidified.
) is adhered to the back part (12a).

Note that the reference numerals in parentheses are for illustrative purposes only, and do not limit equivalent configurations.

(F) EXAMPLES The present invention will be described in detail below with reference to the drawings. Figure 1 (
In a) and (b), the bookbinding device 1 has guide plates 3a and 3b formed in planar shape in the upper opening 2a of the rectangular main body frame 2, which are perpendicular and parallel to each other, and are arranged in the front-rear direction as shown by the arrow A. It is arranged so that it is tangent to and dissociated from it. 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 is engaged with a pinion 4a or a gear 5a of a torque limiter 5, and is connected to a pulley 6 provided on the torque limiter 5 and an 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 in the forward and reverse directions, the guide plates 3a and 3b are moved away from each other along a guide (not shown) via the pinion 4a, torque limiter 5, pulley 6, belt 8, pulley 7, and belt 10, as described above. The torque limiter 5 is configured to sandwich the sheet material P with the guide plates 3a, 3b or the cover member 12 and slip when a predetermined pressure is exceeded.

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

Further, a plate 15 is provided horizontally adjacent to the lower side of the guide plates 3a and 3b. This plate 15 is made of a non-magnetic material such as ceramic that has high heat resistance and is easily permeable to magnetic fields. A coil 16 that generates an alternating magnetic field is provided below the plate 15, and ferrite materials 18a and 18b with high magnetic permeability are formed in an L shape to prevent the alternating magnetic field from leaking outside and causing electromagnetic interference. The ferrite material 1 is attached to the outside of the guide plates 3a and 3b.
The horizontal members 8a and 18b are arranged close to the upper back surface of the main body case 2.

Further, a variable resistor 19 (see FIG. 7) is provided to adjust the thickness of the cover member 12 that holds the sheet material P in accordance with the movement of the guide plates 3a and 3b. It is provided at the bottom of the main body case 2. Note that 21 is a display section.

Further, as shown in FIGS. 2 and 3, a magnetic plate 17 and a hot melt adhesive 22 are adhered or riveted in this order to the inner surface of the spine 12a of the cover member 12. Alternatively, the hot melt adhesive 22 may be set on both sides of the magnetic plate 17.

The magnetic plate 17 is formed in an elongated shape with approximately the same length as the back portion 12a.

Then, the back of the bundle of sheet materials P shown in FIG. 2(b) is set on the hot melt adhesive 22.

Further, the hot melt adhesive 22 is made of hot melt type, PE type, styrene type, acrylic type, etc., and has a melting point of 70 to 2000.
C can be used.

In addition, whether the magnetic plate 17 is heated by a low frequency or high frequency magnetic field without any functional problem, or from the viewpoint of safety against radio waves and magnetic fields and bookbinding performance, it is necessary to
50KHz is preferable.

In addition, a magnetic plate is better than a paste kneaded with magnetic powder, and an iron-based plate with a thickness of 0.1 to 0.5 +++ m is preferable, and a thickness of 0.05 to 0.3 mm is more preferable. obtains a more favorable effect.

However, if it is too thin, heat conduction will be poor, which is disadvantageous in terms of uniform heating, and if it is too thick, the rigidity will be large, which is unfavorable in terms of handling of the bookbinding member.

Next, to explain the coil 16, as shown in FIG. 4, in the rectangular coil 16, the temperature of the magnetic plate 17 near the end portion E increases quickly, and the temperature of the magnetic plate 17 near the center portion C increases slowly. , it takes a long time to raise the temperature to 0 parts or sufficient.

In order to prevent damage to the vicinity of the back portion 12a of the cover member 12, the rate of temperature rise is suppressed, and the heating time is 40 to 60 seconds (though it is slightly faster than this in the conventional heating plate type, which takes 90 to 120 seconds).

Therefore, when dividing the coil 16 into planar ring-shaped coils 16 as shown in FIG. 5(a) or into planar rectangular coils 16 as shown in FIG. 5(b), the coil 16 By flowing current in opposite directions in the adjacent portions M and N, the magnetic body 17 is heated more uniformly.

Then, only a low temperature area of a few mm appears in the N part like a stripe, and this low temperature part does not drop like the C part in Figure 4, so the uniformity is good and bookbinding can be done in 20 to 30 seconds. Become.

Furthermore, as shown in FIG. 6, by dividing the coil 16 and arranging them so as to overlap in the width direction of the magnetic body 17, the low temperature part of the magnetic plate 17 can be clearly recognized in the adjacent part of the coil. It disappears.

The divided coils 16 may be connected in series or in parallel, but from the viewpoint of control and cost, it is preferable to connect them in series.

Next, the control block diagram shown in FIG. 7 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.

When the cover member 12 is detected by receiving the light beam from the emitter 14a with the receiver 14b, the controller 20 sends a signal to the motor driver 25 to cause the motor 4 to move the guide plates 3a, 3b closer together. It is now possible to send 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 time during which the coil 16 is energized in accordance with the resistance value signal of the variable resistor 19.

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 is connected to the power source, the control unit 20 operates the motor driver 25, and the motor 4 drives the guide plate 3.
Set the initial state in which a and 3b are opened (Step) Then, the cover member 12 is inserted between the guide plates 3a and 3b, and the process waits until the light reception by the light receiver 14b is interrupted.

(Step 2).

Then, when the cover member 12 is detected, the motor 4 moves the guide plates 3a and 3b closer together (Step 4) The level of the resistance signal of the variable resistor 19 becomes constant (Step 4)
Then, the motor 4 is stopped (Step 5). Also, a timer for energizing the coil 16 is set according to the resistance signal of the variable resistor 19, that is, a heating time timer is set (Step 5).
6) Do.

In this embodiment, when the thickness of the cover member 12 and the bundle of sheets P is 5 to 15 m+a, the timer is set to 60 seconds and 15 to 2 seconds.
For 0II11, it is 50 seconds, and for 20-5C1++m, it is 40 seconds. In this manner, the bookbinding apparatus using induction heating requires less bookbinding time, which is inversely proportional to the thickness of the bookbinding member, and can provide good bookbinding performance.

During dielectric heating, the light receiver 14b constantly monitors whether the cover member 12 has been pulled out from between the guide plates 3a and 3b, and if it has been pulled out, the current supply to the coil 16 is stopped and initialization (Ste pl) (Step 7
). Also, display the timer time during this time (Step
9).

When the heating time is reached (Step 8), the buzzer 26 sounds to indicate the completion of the work, and the system waits for the cover member 12 to be removed (S
tep 10, 11).

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

As explained above, when bookbinding is performed using the dielectric heating device 1 of the present invention, as the thickness of the cover member 12 sandwiching the sheet material P, that is, the number of bundles of sheet materials increases, the bookbinding work takes longer. It has been possible to obtain good bookbinding performance in which the amount of paper is reduced.

(g) As described in detail, according to the present invention, the magnetic body interposed between the sheet material and the back of the cover member generates heat due to the alternating magnetic field generated by the coil, and the magnetic material is directly heat-fused and bonded. Heat the agent and
Since it is melted, unlike heating via the cover member, heating energy can be reduced regardless of the thickness and material of the cover member holding the sheet material, and bookbinding time can be shortened and work efficiency can be improved.

Furthermore, by overlapping the adjacent parts of the alternating magnetic field generating coils in the width direction of the magnetic plate, it is possible to improve the uniformity of heating and further improve work efficiency.

Note that the hot-melt adhesive and the magnetic plate may be attached to the cover member in advance, or may be placed on the cover member when the cover member is set on the support member.

[Brief explanation of the drawing]

FIG. 1(a) is a cross-sectional side view of an embodiment of the present invention, FIG.
b) is a perspective view thereof, FIG. 2(a) is a perspective view of the bookbinding member, FIG. 2(b) is a perspective view of the sheet material, FIG. 3 is a detailed side view of FIG. 2(a), Figure 4 is a plan view showing the relationship between the coil and the magnetic plate, Figures 5 (a) and (b) are plan views of the coils arranged in a divided manner, and Figure 6 shows the divided coils overlapping in the width direction of the magnetic plate. FIG. 7 is a control block diagram, and FIG. 8 is a flow chart thereof. 1... Bookbinding device 3a, 3b, 15... Supporting member (guide plate, plate) 12... Bookbinding member
12a... Back 16... Alternating magnetic field generating coil 17... Magnetic plate 22... Hot melt adhesive P... Sheet material

Claims (1)

[Scope of Claims] 1. In a bookbinding device that melts a hot-melt adhesive interposed on the back of a cover member, the cover has a magnetic plate that generates heat by an alternating magnetic field to heat and melt the hot-melt adhesive. A bookbinding apparatus comprising: a support member that supports a member; and a plurality of alternating magnetic field generating coils that are arranged near the support member and generate the alternating magnetic field. 2. The bookbinding apparatus according to claim 1, wherein adjacent portions of the coils arranged in a row overlap each other in the width direction of the magnetic plate.