JP2003054156A - Clamp forming device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a clamp forming device capable of forming an object to be molded without adjustment even when the thickness of the object changes and always under a regulated pressure. SOLUTION: This clamp forming device comprises a pair of clamping plates 11 and 12, a motor 18, a drive transmission means 17 which is driven by the motor 18 and runs in a specified direction, a clamping plate transfer means which clamps the object to be molded arranged between a pair of the clamping plates 11 and 12 from both sides by transferring the paired clamps in a direction where the clamping plates 11 and 12 come into close proximity to each other through the running of the drive transmission means 17 in a specified direction and a guide roller 19 which is installed in a freely transferable manner, on the upstream side of the motor which runs, guiding the drive transmission means along a specified route. In addition, the device comprises an urging means 23 which urges the guide roller 19 so that it is transferred in a direction where the drive transmission means 17 becomes tense, a sensor means 24 which detects the specified movement of the guide roller 19 when it is transferred, resisting the urging force of the urging means 23 and a control means which controls so that the rotation of the motor is stopped and the motor is immobilized at a position where the motor is stopped, when the sensor means 24 detects the specified movement of the guide roller 19 after driving the motor.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a clamp forming apparatus for forming an object to be molded by clamping it from both sides at a specified pressure, and more particularly to a cover using a hot melt adhesive on the back of the text to be bound. The present invention relates to a clamp molding device that can be suitably used as a molding device when binding and binding.

[0002]

2. Description of the Related Art Various proposals have hitherto been made for a bookbinding apparatus and method for binding a back of a text to be bound to a cover with a hot melt adhesive. That is, apply the hot-melt adhesive in the molten state to the back of the text, or apply the hot-melt adhesive in the molten state to the center of the cover to which the back of the text should be adhered, or to the center of the cover. Attach a hot melt adhesive sheet in advance and heat it with a heater to melt it,
After binding the back of the text by pressing it against the center of the cover, the back of the cover is bent according to the thickness of the text for bookbinding.

In this final bookbinding step, it is required to sandwich a back portion of the body to which the cover is adhered from both sides of the front and back sides between a pair of clamp plates to apply a predetermined molding pressure.

[0004]

By the way, since the thickness of the text to be bound is not constant, conventionally, the position of the clamp plate must be adjusted according to the thickness of the text, which is extremely troublesome. there were.

[0005]

SUMMARY OF THE INVENTION The present invention solves the above-mentioned disadvantages of the prior art, and allows a clamp molding apparatus to always perform molding at a prescribed pressure without adjustment even when the thickness of the molding target fluctuates. The purpose is to provide.

In order to achieve this object, the present invention according to claim 1 is a clamp forming device for forming an object to be formed by clamping it from both sides at a prescribed pressure, and a pair of clamp plates, a motor, and The drive transmission means is driven by a motor and travels in a predetermined direction, and the drive transmission means travels in a predetermined direction to move the pair of clamp plates in a direction in which they are close to each other so that the molding object disposed between the pair of clamp plates is on both sides. A clamp plate moving means for clamping the drive transmitting means along a predetermined path, a guide roller movably provided upstream of the motor for guiding the drive transmitting means along a predetermined path, and a guide roller for moving the drive transmitting means in a tensioning direction. An urging means for urging the urging means, and a sensor means for detecting a predetermined movement amount of the guide roller when the guide roller moves against the urging force of the urging means,
When the sensor means detects a predetermined movement amount of the guide roller after the motor is driven, the motor rotation is stopped and the control means is controlled to hold the motor at that position immovably.

According to a second aspect of the present invention, there is provided a clamp forming device for forming an object to be formed by clamping the formed object from both sides at a prescribed pressure, and a pair of clamp plates, a motor, and
The drive transmission means is driven by a motor and travels in a predetermined direction, and the drive transmission means travels in a predetermined direction to move the pair of clamp plates in a direction in which they are close to each other so that the molding object disposed between the pair of clamp plates is on both sides. Clamp plate moving means for clamping from the motor, a first guide roller movably provided upstream of the motor to guide the drive transmission means along a predetermined path, and a rotation fulcrum of the first guide roller and a fixed position. A first arm bridged between the first arm and a first biasing means for rotating and biasing the first arm so as to move the first guide roller in a direction in which the drive transmission means is tensioned;
A second guide roller movably provided on the downstream side of the motor for guiding the drive transmission means along a predetermined path, and a second bridge spanned between the second guide roller and the rotation fulcrum at the fixed position. Arm, a second urging means for rotationally urging the second arm so as to move the second guide roller in a direction of tensioning the drive transmission means, and an urging force of the first urging means. Then, when the first arm rotates, the sensor means detects a predetermined rotation amount of the first arm, and when the sensor means detects a predetermined rotation amount of the first arm after the motor is driven, the motor rotation is stopped and the position thereof is changed. And a control means for controlling to hold it immovably.

According to a third aspect of the present invention, the clamp plate moving means includes a pair of pulleys which are provided in a traveling path of the drive transmitting means in a predetermined direction and engage with the drive transmitting means, a male screw integrally extending from each pulley, and a pair of pulleys. It is characterized in that it is composed of a male screw and a female screw that are screwed together and formed substantially aligned with the clamp plate, and the female screw is threaded in opposite directions on the pair of clamp plates.

According to a fourth aspect of the present invention, in the clamp forming apparatus according to any of the first to third aspects, the drive transmission means is an endless member including a timing belt, a chain and a wire.

According to a fifth aspect of the present invention, in the clamp molding apparatus according to any one of the first to fourth aspects, the material to be molded is a bookbinding material in which a cover is temporarily adhered to the spine of the text with a hot melt adhesive. Characterize.

[0011]

1 is a perspective view showing a schematic structure of a clamp molding apparatus according to an embodiment of the present invention. This clamp molding apparatus 10 has a back portion of the text A and hot portions on both side portions close to the back portion. It is used as a device for firmly bonding the cover sheet B via a melt adhesive and at the same time bending the cover sheet B along both side edges of the back of the text A for forming and binding the cover sheet. In the text A, a pair of clamp plates 11 and 12 in the device 10 are provided after hot melt adhesive is applied to the back and both sides close to the back.
Is held open, it is transferred to a position where the back is inserted between the clamp plates.

Female screws 13 and 13 which are left-handed screws are threaded on both ends of the clamp plate 11, and female screws 14 and 14 which are right-handed screws are threaded on both ends of the clamp plate 12. The female screws 13 and 14 are aligned with each other, and the male screw 16 integral with the pulleys 15 and 15 is sequentially screwed into the female screws 13 and 14.

A timing belt 17 is stretched between the pulleys 15 and 15, and the rotation of the motor 18 causes the timing belt 17 to rotate.
At orbit counterclockwise. Pulleys 15, 15
At the same time, a plurality of belt running guide rollers for defining the running path of the timing belt 17 are provided. Among them, at least one of the belt running guide rollers provided upstream of the motor 18 and the downstream side of the motor 18 are provided. At least one of the belt running guide rollers 20 provided is movably provided in a direction in which the timing belt 17 is tensioned / relaxed. In the illustrated embodiment, both the upstream and downstream belt running guide rollers 19 and 20 are rotatable about a substantially horizontal axis, and the timing belt 17 runs in contact with the lower surface side thereof. It is possible to move up and down by a mechanism that does not.

One end of an arm 21 is rotatably connected to the belt running guide roller 19 which is movable up and down on the upstream side of the motor. The arm 21 is rotatable about a fixed rotation fulcrum 22, but is urged by a spring 23 so as to rotate clockwise in the figure, in other words, to tension the timing belt 17. As will be described later, the spring force of the spring 23 causes the object to be molded (in this embodiment, a cover B by a hot-melt adhesive to be attached to the spine of the body A).
Control the forming pressure for the bookbinding material that is temporarily adhered. The micro switch 24 is pushed by the arm 21 when the arm 21 rotates counterclockwise in the drawing against the spring force of the spring 23 and reaches a predetermined angular position, and turns on, and the detection signal is not shown. Send to control means.

One end of an arm 25 is rotatably connected to the belt running guide roller 20 which is movable up and down on the downstream side of the motor. The arm 25 is rotatable about a fixed rotation fulcrum 26, but is biased by a spring 27 so as to rotate counterclockwise in the figure, in other words, to tension the timing belt 17.

Although not shown, the clamp plates 11, 1
2 is movably mounted on a support, and the back of the bookbinding material inserted between the clamp plates 11 and 12 is in contact with this support.

The operation of the clamp molding apparatus configured as described above is controlled by control means such as a computer (not shown), which will be described with reference to the flowchart of FIG.

First, in S1, the object to be molded is clamped to the clamp plate 1
Insert and arrange between 1 and 12. At this time, the clamp plate 11,
12 is in the open position, which is separated from the maximum allowable thickness of the molding target. In the illustrated embodiment, the material to be molded is a bookbinding material in which the cover B is temporarily adhered to the spine of the text A with a hot melt adhesive, and the allowable thickness range of the text A is 5 to 20 mm. A space (for example, 25 mm) slightly larger than the thickness of 20 mm is formed between the clamp plates 11 and 12, and the back of the bookbinding material is inserted therebetween.

According to a preferred embodiment, the text A having hot melt adhesive applied to the back and both sides close to the back is provided by a clamp mechanism (not shown) different from the clamp molding apparatus 10. They are held in a butt-aligned state, and while being transferred to a predetermined position on the clamp forming apparatus 10, the cover B is transferred between the body A and the clamp forming apparatus 10, and then the clamp forming apparatus 10 is raised. As a result, the cover B is pressed against the spine of the text A, and the cover B is adhered to the spine of the text A via the hot-melt adhesive already applied.

After the object to be molded is inserted and arranged between the clamp plates 11 and 12, the motor 18 is driven to rotate in the forward direction to rotate the timing belt 17 in the direction of the arrow in S2.
As a result, the pulley 15 rotates as described above, and the male screw 1
Clamp plate 1 through screwing of 6 and female screws 13 and 14
1 and 12 move in the direction of approaching each other to clamp the molded object. At this point in time, the clamp plates 11 and 12 are only in close contact with both sides of the object to be molded, and the specified pressure required for molding is not acting.

After that, when the motor 18 further rotates in the normal direction, a force is applied to the pulleys 15 and 15 so as to shorten the traveling path of the timing belt 17 while the pulleys 15 and 15 remain stationary. A load is applied to a certain belt traveling guide roller 19 that can move up and down, and the arm 21 rotates counterclockwise in FIG. 1 about the fulcrum 22 against the spring force of the spring 23, and the belt traveling guide roller 19
Raise. Although the timing belt 17 is loosened by the counterclockwise rotation of the arm 21, the belt traveling guide roller 20 on the downstream side of the motor 18, which is movable up and down, is lowered by the spring force of the spring 27 applied to the arm 25, and the looseness is caused. Absorbs.

The arm 21 is replaced by the micro switch 2
When it touches 4, it receives the detection signal (S3: Ye
s), the rotation of the motor 18 is stopped, and the motor 18 immovably holds itself at that position (S4). At this time, the spring 23 applied to the arm 21 causes the belt running guide roller 19 to move.
Is urged to move the timing belt 17 in the direction of the arrow. Therefore, the pulleys 15, 1 wound around the timing belt 17 are urged.
A rotational moment corresponding to the spring force of the spring 23 is generated in the spring 5, and a force for moving the clamp plates 11 and 12 closer to each other through the engagement of the male screw 16 and the female screws 13 and 14, That is, the molding pressure acts on the object to be molded. Since the molding pressure is proportional to the spring force of the spring 23, it can be controlled to a prescribed molding pressure by adjusting the spring force of the spring 23.

After the molding process for a predetermined time is completed in this way (S5: Yes), the motor 18 is rotated in the reverse direction so that the timing belt 17 runs in the direction opposite to the arrow direction.
The clamp plates 11 and 12 are moved in a direction in which they are separated from each other to the open position, and the molded object for which molding has been completed is discharged.

In the above-described embodiment, the clamp forming device of the present invention is applied to the cover bonding and cover forming device in the bookbinding process, but the present invention is not limited to this. It is widely applicable to clamp molding equipment used to clamp and mold molded products from both sides at a specified pressure, and always molds at a specified molding pressure for objects with varying thickness. Is particularly suitable in the field where is required.

[0025]

According to the clamp forming apparatus of the present invention, even if the thickness of the object to be molded varies, it can always be molded at the specified molding pressure, and it is not necessary to adjust the position of the clamp plate.
Therefore, it is particularly useful as a clamp forming device for forming a cover in a bookbinding process in which the thickness of the text varies variously.

[Brief description of drawings]

FIG. 1 is a perspective view showing a schematic configuration of a clamp molding apparatus according to an embodiment of the present invention.

FIG. 2 is a control flow for explaining the operation of this clamp molding device.

[Explanation of symbols]

10 Clamp molding device 11, 12 Clamp plate 13 Left-handed female screw 14 Right-handed female screw 15 Pulley 16 Male screw 17 Timing belt 18 Motor 19 Motor upstream / downward movable belt running guide roller 20 Motor downstream / upward / downward Movable belt guide roller 21 Arm 22 Arm rotation fulcrum 23 Spring 24 Micro switch 25 Arm 26 Arm rotation fulcrum 27 Spring

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Hajime Nishimura             500 Dyna stock in Kashima, Fukaya city, Saitama prefecture             Company Saitama Office (72) Inventor Junji Chatani             500 Dyna stock in Kashima, Fukaya city, Saitama prefecture             Company Saitama Office

Claims (5)

[Claims] 1. A clamp forming apparatus for forming an object to be formed by clamping it from both sides at a prescribed pressure, comprising a pair of clamp plates, a motor, and drive transmission means driven by the motor and traveling in a predetermined direction. , A predetermined number of drive transmission means and a clamp plate moving means for moving the pair of clamp plates in a direction approaching each other by driving the drive transmission means in a predetermined direction to clamp an object to be molded disposed between the pair of clamp plates from both sides. A guide roller movably provided on the upstream side of the motor to guide the vehicle along the route, a biasing means for biasing the guide roller to move in a direction in which the drive transmission means is tensioned, and a biasing means for biasing. Sensor means for detecting a predetermined amount of movement when the guide roller moves against the force,
Clamp forming apparatus comprising: a control unit that stops the motor rotation and holds the motor stationary at that position when the sensor unit detects a predetermined amount of movement of the guide roller after driving the motor. . 2. A clamp forming device for forming an object to be formed by clamping it from both sides at a prescribed pressure, a pair of clamp plates, a motor, and drive transmission means that is driven by the motor and travels in a predetermined direction. , A predetermined number of drive transmission means and a clamp plate moving means for moving the pair of clamp plates in a direction approaching each other by driving the drive transmission means in a predetermined direction to clamp an object to be molded disposed between the pair of clamp plates from both sides. A first guide roller movably provided upstream of the motor to guide the vehicle along the route; a first arm bridged between the first guide roller and a rotation fulcrum at a fixed position; A first urging means for rotationally urging the first arm so as to move the first guide roller in a direction to tension the transmission means, and a drive transmission means for guiding the drive transmission means along a predetermined path. A second guide roller movably provided on the downstream side of the rotor, a second arm bridged between the second guide roller and a rotation fulcrum at a fixed position, and a second arm in a direction to tension the drive transmission means. Second urging means for rotationally urging the second arm so as to move the second guide roller;
A sensor means for detecting a predetermined rotation amount when the first arm rotates against the urging force of the first urging means, and a sensor means for detecting a predetermined rotation amount of the first arm after driving the motor. A clamp forming device, comprising: a control unit that stops the rotation of the motor and holds the motor stationary at that position when detected. 3. The clamp plate moving means includes a pair of pulleys provided on a traveling path of the drive transmitting means in a predetermined direction and engaged with the drive transmitting means, and a male screw integrally extending from each pulley.
The male screw and the female screw that are screwed together are formed substantially in alignment with the pair of clamp plates, and the female screw is threaded in the opposite direction on the pair of clamp plates. 2. The clamp molding device according to 2. 4. The clamp molding device according to claim 1, wherein the drive transmission means is an endless member including a timing belt, a chain and a wire. 5. The clamp molding apparatus according to claim 1, wherein the object to be molded is a bookbinding material in which a cover is temporarily adhered to the spine of the text with a hot melt adhesive.