JPH02239991A - Adhesive paste applicator for bookbinding - Google Patents

Abstract

PURPOSE:To securely prevent the adhesion of an excess of an adhesive paste to front and rear end parts of the back of a bundle of sheets of paper through using a simple construction by providing a pasting drum position controller capable of controlling a set position of a pasting drum relative to a passage line of the back of the bundle of sheets, CONSTITUTION:A controller 20 comprises, e.g. a microcomputer, and controls a clamper-moving motor 16, a drum-rotating motor 17 and a drum position- controlling solenoid 18. An operating timing for controlling a set position of a pasting drum 14 relative to a passage line of the back of a bundle of sheets of paper 11 is determined by taking into account only two elements, namely, the velocity of a clamper 12 and the result of detection by a sensor 19 for detecting an end part of the bundle 11, whereby the set position of the drum 14 relative to the back side of the bundle 11 can be controlled at the time of a forward movement of the clamper 12 and at the time of a backward movement of the clamper 12. Therefore, the adhesion of an excess of an adhesive paste to front and rear end parts of the back of the bundle 11 and the adhesion of the paste at the time of feeding the bundle 11 backward can be securely prevented through a simple construction.

Description

[Detailed description of the invention] [Industrial application fields] The present invention relates to a bookbinding glue applicator.

[Prior Art] Conventionally, there has been known a bookbinding glue applicator that moves a paper stack and applies glue to the back of the paper stack during the movement, and the glue applicator uses the glue to form the paper stack into a booklet shape. We are planning to unite. That is, the glue applicator includes a clamper that clamps a bundle of sheets, a glue drum immersed in a glue tank, and a clamper moving device that allows the clamper to pass along the glue drum. Gluing is carried out by moving the back side of the paper bundle so as to rub it against the upper surface of the gluing drum.

However, in the above-mentioned glue applicator, when one end or the other end of the back side of the paper bundle passes over the top surface of the glue drum, the drum-shaped glue is scraped off at the front end, and the back end is scraped off. At the side edges, the glue on the drum will tend to stick. As a result, the excess adhesive sticks out from both the front and back ends of the paper bundle, spoiling the appearance of the product.

Therefore, in the glue applicator described in Japanese Utility Model Publication No. 59-24387, a paper bundle edge detection sensor is newly installed.
Before one end and the other end of the paper stack reach the glue-applying drum, the wiper is controlled to scrape off the glue on the drum, so that excessive glue adheres to one end and the other end of the back of the paper stack. Efforts have been made to prevent this from happening.

[Problem to be solved by the invention] However, in the above conventional glue applicator, the following
, ■There are problems.

■The timing at which the wiper starts and ends scraping off the glue on the glue-applied drum is determined by four factors: the moving speed of the clamper, the set position of the paper bundle end detection sensor, the set position of the wiper, and the rotational speed of the drum. It is necessary to take these factors into consideration.

Therefore, the control for performing the scraping operation of the wiper becomes complicated.

■Also, in the above-mentioned conventional glue applicator, in order to complete only one process of gluing or the forward or backward movement of the clamper, and to prevent glue from getting on the back of the paper stack during the other process, Place the clamper on both sides of the gluing drum (initial position and return position)
A device to move it up and down is also required. That is, in this case, a device for performing both the scraping operation of the wiper and the up-and-down operation of the clamper and complicated control thereof are required.

An object of the present invention is to reliably prevent excessive glue from adhering to the front and rear ends of the back surface of a stack of sheets using a simple configuration.

Another object of the present invention is to use a simple configuration to reliably prevent excessive glue from adhering to the front and rear ends of the back surface of a paper stack and from adhering glue when the paper stack is fed backwards. .

[Means for Solving the Problems] The present invention as set forth in claim 1 is a bookbinding glue applicator that moves a sheaf of paper and applies glue to the back side of the sheaf of paper during the movement, which clamps the sheaf of paper. A clamper, a glue drum that is immersed in a glue tank, a clamper moving device that allows the clamper to pass along the glue drum, and a glue device that allows the set position of the glue drum to be adjusted with respect to the back passage line of the paper stack. Based on the detection results of the drum position adjustment device, the paper stack end position detector that detects the end position of the paper stack when the clamper moves, and the paper east end position detector, one end and the other end of the back of the paper stack are detected. When passing through, the gluing drum is moved away from the back passing line of the paper bundle, and when passing through the middle part of the back of the paper stack, excluding the above-mentioned one end and the other end, the gluing drum is set to the back passing line of the paper bundle. The present invention is configured to include a control device for controlling the gluing drum position adjustment device.

The present invention according to claim 2 provides that the clamper moving device comprises:
The clamper is caused to pass along the glue drum in both reciprocating directions, and the control device applies glue over the entire range including one end and the other end of the back surface of the paper stack under the passing state in which the clamper moves in one of the reciprocating directions. Under the passing condition in which the attached drum is moved away from the back surface passing line of the paper stack and the clamper moves to the other side of the reciprocating direction, one end and the other end of the back surface of the paper stack are determined based on the detection results of the paper stack end position detector. When passing, the gluing drum is moved away from the back passage line of the paper bundle, and when passing the middle part of the back of the paper bundle, excluding the above-mentioned one end and the other end, the gluing drum is set to the back passage line of the paper bundle. There is a device that controls the gluing drum position adjustment device so as to do so.

[Function] According to the present invention as set forth in claim 1, there is the following function and effect.

■The control device uses the glue drum position adjustment device to determine the operation timing for adjusting the set position of the glue drum with respect to the back passage line of the paper stack based on the moving speed of the clamper and the paper stack end position detector. This can be done by considering only two systems of detection results, and is simple. Therefore, with a simple configuration, it is possible to reliably prevent excessive glue from adhering to the front and rear ends of the back surface of the paper bundle.

According to the present invention as set forth in claim 2, there is the following effect (2).

(2) The control device uses a glue drum position adjustment device to set the set position of the glue drum with respect to the back side of the paper stack as described in claim 2 when the clamper moves forward and when the clamper moves backward. can. That is, by only adjusting the position of the gluing drum, gluing to the middle part of the back side of the paper stack excluding the front and rear ends is completed in only one process of the forward or backward movement of the clamper, and the gluing is completed in the other process. can prevent glue from getting on the back of the paper stack. Therefore, with a simple configuration, it is possible to reliably prevent excessive glue from adhering to the front end and rear end of the back surface of the paper stack, as well as from glue adhering when the paper stack is fed backwards.

[Example] Fig. 1 is a schematic side view showing a glue applicator according to an embodiment of the present invention, Fig. 2 is a schematic plan view of Fig. 1, and Fig. 3 is a block diagram showing a control system of the glue applicator. 4 are schematic diagrams showing the operation of the glue applicator.

The bookbinding glue applicator N10 moves the paper bundle 11, applies glue to the back side of the paper bundle 11 during the movement, and applies glue to the back surface of the paper bundle 11.
1 is bound into a booklet shape with glue.

As shown in FIGS. 1 to 3, the glue applicator 10 includes a clamper 12, a glue tank 13, a glue drum 14, a doctor roller 15, a clamper moving motor 16, a drum rotation motor 17, and a drum position controller. It is configured to include an adjustment solenoid 18, a sheet bundle end detection sensor 19, and a control device 20.

The clamper 12 clamps the paper bundle 11 manually or automatically. At this time, the paper bundle 11 is clamped on the receiving plate 21 located on the entrance side of the glue tank 13, after its back surface is aligned, its front end surface and rear end surface are also adjusted. The receiving plate 21 is movable up and down, and after the paper bundle 11 is clamped by the clamper 12, it waits below until the paper bundle 11 after completion of gluing is transferred from the clamper 12.

The glue tank 13 stores glue, for example a hot melt adhesive, and is swingably supported by a bracket 23 provided on the upper part of the base 22 via a shaft 23A.

The glue tram 14 is rotatably supported by the glue tank 13 and has its lower half immersed in the glue inside the glue tank 13 so as to transfer the glue to the back surface of the paper bundle 11 clamped by the clamper 12. adhere to.

The doctor roller 15 is rotatably supported by the glue tank 13, is located inside the glue tank 13, and is connected to the glue drum 14.
The thickness of the glue adhered to the back surface of the paper bundle 11 is adjusted by adjusting the thickness.

The clamper moving motor 16 causes the clamper 12 to pass over the pasting drum 14 in both directions.

The drum rotation motor 17 rotates the glue tram 14 and the doctor roller 15 via the winding member 24 .

The drum position adjustment solenoid 18 adjusts the set positions of the glue tank 13 and the glue tram 14 so that they approach/ltl apart from the back passage line of the paper bundle 11. That is,
The glue tank 13 is swingably supported via a shaft 23A,
While receiving the push-up force of the push-up spring 25, it can be set to the upper limit position by the upper limit stopper 26, and is lowered by swinging around the shaft 23A due to the excitation of the solenoid 18, and is lowered appropriately. It can be set to any position. The two-limit spacing 26 is screwed onto the base 22, and the upper limit position of the glue tank 13 can be adjusted by adjusting the screwing position. When the glue tank 13 is set at the upper limit position, the gluing drum 14 is set at the back passage line of the paper bundle 11 and can apply glue to the back surface of the paper bundle 11.

The sheet bundle end detection sensor 19 is composed of a pair of light emitters 19A and a light receiver 19B set at a specific position at a certain distance in the lateral direction from the position directly above the glue tram 14. Detect the edge of.

The control device 20 is composed of, for example, a microcomputer, and includes the above-mentioned clamper moving motor 16 and drum rotation motor 1.
7. Control the drum position adjustment solenoid 18 as follows.

That is, the control device 20 controls the clamper moving motor 16 via the clamper moving motor drive circuit 27. At this time, the control device 20 starts the forward movement of the clamper 12 from the original position by turning on the operation switch 28, and moves the clamper 12 to the return position, which is configured by a limit switch provided at the return position, a rotary encoder provided on the clamper movement motor 16, etc. After stopping the clamper 12 at the return position based on the detection result of the detector 29, the clamper 12 is reversed to start the return movement, and the limit switch and clamper movement motor 16 provided at the original position are
The clamper 12, which has returned to the original position, is stopped at the original position based on the detection result of the clamper original position detector 30, which is comprised of a rotary encoder or the like provided at the original position.

The control device 20 also controls the drum rotation motor drive circuit 3.
1 to control the drum rotation motor 17. At this time,
The control device 20 starts rotating the glue drum 14 when the operation switch 28 is turned on, and stops the rotation of the glue drum 14 when the operation switch 28 is turned off.

The control device 20 also controls the drum position adjustment solenoid 18 via a drum position adjustment solenoid drive circuit 32 . At this time, the control device 20 controls (A) the clamper 12
Under the passing state in which the paper bundle 11 moves in the forward direction, the adhesive drum 1 is moved over the entire range including one end and the other end of the back surface of the paper bundle 11.
4 away from the back passage line of the paper bundle 11, and (B
) Under the passing state in which the clamper 12 moves in the backward movement direction, the paper stack 11 is
The glued drum 14 passes through one end and the other end of the back surface of the
away from the back passage line of the paper bundle 11, and
The drum position adjustment solenoid 18 is controlled so that the gluing drum 14 is set at the back surface passage line of the paper bundle 11 when the paper bundle 11 passes through the intermediate portion of the back surface of the paper bundle 11 excluding the one end and the other end.

Next, the operation order of the glue applicator 710 will be explained.

(2) Align the paper bundle 11 on the receiving plate 21 and clamp it to the clamper 12 (see FIG. 4(A)). After this, the receiving plate 21
is descending.

- When the operation switch 28 is turned on, the clamper moving motor 16 is driven and the clamper 12 starts moving forward.
The drum rotation motor 17 is driven and the gluing drum 14 starts rotating. When the clamper return position detector 29 is turned on, the clamper moving motor 16 stops, then reverses, and the clamper 12
starts to move backward (see Fig. 4 (B)).

Incidentally, at the time of (2) above, the gluing drum 14 is in the lowered position due to the energization of the drum position adjustment solenoid 18, and is kept away from the back passage line of the paper bundle 11 (see height h in FIG. 4(A)). .

(2) The paper stack end detection sensor 19 detects one end of the paper stack 11 during the backward movement. Thereafter, for a predetermined period of time tβ1 measured by the timer circuit of the control device 20, the adhesive drum 14 maintain in the lowered position. In FIG. 4(C), ρ1 indicates the amount of movement of the paper bundle 11 at the above-mentioned time tf21, and k1 is the range in which no glue adheres at the above-mentioned one end.

(2) At the same time as the one end of the paper bundle 11 passes directly above the glue drum 14, the drum position adjustment solenoid 18 is deenergized and the glue drum 14 is switched to the upper limit position. As a result, the gluing drum 14 is set at the back passage line of the paper bundle 11, and glue is attached to the intermediate portion of the back surface of the paper bundle 11 (see FIG. 4(C)).

(2) A paper bundle end detection sensor 19 detects the other end of the paper bundle 11. Thereafter, when the other end of the paper bundle 11 that does not require adhesive adhesion reaches directly above the glue drum 14, the drum position adjustment solenoid 18 is energized to switch the glue drum 14 to the lowered position again. As a result, the glue tram 14 is moved away from the back passage line of the paper bundle 11 (Fig. 4 (D)).
(see height h). In FIG. 4(D), k2 is the range in which no glue adheres at the other end.

■After that, while paper stack 11 returns to its original position, paper stack 1
The glue adhered to the middle part of the back surface of 1 is smoothed out by a toctor roller 15. Thereafter, the backward movement of the paper bundle 11 is completed, and the clamper original position detector 30 is turned on, which causes the clamper movement motor 16 to stop and the clamper 12 to stop moving backward (see FIG. 4).
(See E).

Thereafter, the receiving plate 21 is raised, and after a certain period of drying time has elapsed, the clamper 12 unclamps the paper bundle 11.

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

■The control device 20 controls the drum position adjustment solenoid 18 so that the glued drum 14 is aligned with the back passage line of the paper bundle 11.
The operation timing for adjusting the setting position can be determined by taking into account only two factors: the moving speed of the clamper 12 and the detection result of the paper east edge detection sensor 19.
It's simple. Therefore, with a simple configuration, it is possible to reliably prevent excessive glue from adhering to the front and rear ends of the back surface of the paper bundle 11.

■The control device 20 can use the drum position adjustment solenoid 18 to adjust the set position of the gluing drum 14 with respect to the back side of the paper bundle 11 as described above when the clamper 12 moves forward and backward. .

That is, by only adjusting the position of the gluing drum 14, the gluing of the intermediate portion of the back surface of the paper bundle 11 excluding the front and rear ends is completed in only one of the forward and backward movements of the clamper 12, and the gluing of the intermediate portion of the back surface of the paper bundle 11 is completed, and the gluing is completed on the other side. In this process, it is possible to prevent glue from sticking to the back surface of the paper bundle 11. Therefore, with a simple configuration, it is possible to reliably prevent excessive glue from adhering to the front and rear ends of the back surface of the paper bundle 11 and from glue adhering when the paper bundle is fed backwards.

In the practice of the present invention, the paper bundle end position detector for determining the position adjustment timing of the gluing drum is one that directly detects the end of the paper bundle 11 like the sensor 19 in the above embodiment. Instead, it is also possible to use a device that detects the current position of the end of the paper stack based on the amount of movement of the clamper from its original position, such as a rotary encoder provided in a clamper moving device.

Further, the present invention according to claim 1 provides that (A) the paper bundle clamped by the clamper is moved only in one direction and glued to the middle part of the back surface during the movement process, or (B) the paper bundle is moved by the clamper This method can also be applied to a case where a clamped paper bundle is reciprocated and glued to the middle part of the back surface during both of the reciprocating processes.

[Effects of the Invention] As described above, according to the present invention as set forth in claim 1, the phenomenon of excessive glue adhesion to the front and rear ends of the back surface of a stack of sheets can be reliably prevented with a simple configuration. be able to.

Further, according to the present invention as set forth in claim 2, the simple structure ensures that excessive glue adhesion to the front and rear ends of the back surface of the paper stack and glue adhesion phenomenon when the paper stack is reversely fed is prevented. can be prevented.

[Brief explanation of drawings]

FIG. 1 is a schematic side view showing a glue applicator according to an embodiment of the present invention, FIG. 2 is a schematic plan view of FIG. 1, FIG. 3 is a block diagram showing a control system of the glue applicator, and FIG. The figure is a schematic diagram showing the operation of the glue applicator. DESCRIPTION OF SYMBOLS 10... Glue applicator for bookbinding, 11... Sheet of paper, 12... Clamper, 13... Glue tank (glue tank), 14... Glue drum, 16... Clamper moving motor ( (clamper moving device), 18... Drum position adjustment solenoid (glued drum position adjustment device) 9... Sheet bundle end detection sensor (paper bundle end detector) 20... Control device.

Claims (2)

[Claims] (1) A bookbinding glue applicator that moves a paper stack and applies glue to the back of the paper stack during the movement, which includes a clamper that clamps the paper stack, a glue drum immersed in a glue tank, and a clamper. a clamper moving device that allows the paper to pass along the glue drum; a glue drum position adjustment device that can adjust the setting position of the glue drum with respect to the back passage line of the paper bundle;
A paper stack edge position detector detects the edge position of the paper stack when the clamper moves, and based on the detection results of the paper stack edge position detector, glue is applied when one end and the other end of the back of the paper stack pass. The drum is moved away from the back side passing line of the paper bundle, and the glue drum is set at the back side passing line of the paper stack when passing through the middle part of the back side of the paper stack excluding the above-mentioned one end and the other end. 1. A bookbinding glue applicator comprising: a control device for controlling an attached drum position adjustment device. (2) The clamper moving device causes the clamper to pass along the glue drum in both reciprocating directions, and the control device controls one end of the back surface of the paper bundle and The glue drum is kept away from the back side passing line of the paper stack over the entire area including the other end, and under the passing condition in which the clamper moves to the other side of the reciprocating direction, the paper stack When passing one end and the other end of the back of the paper stack, move the glue drum away from the back passage line of the paper bundle, and move the glue drum when passing the middle part of the back of the paper stack other than the above one end and the other end. 2. The bookbinding glue applicator according to claim 1, wherein the glue applying drum position adjusting device is controlled so as to be set at the back side passing line of the sheet bundle.