CN117775824A - Bonding device - Google Patents

Abstract

The invention provides an adhesive device, which can adjust the position of a sheet in a direction crossing a conveying direction by an upper clamping roller and a lower clamping roller and adhere the folded part of the sheet. The bonding device is provided with: an upper support portion that supports a folded-back edge portion in the sheet from a lower side; a lower nip roller that nips a portion of the sheet other than the edge portion from below between the lower surface of the upper support portion; and an upper pinch roller which pinch the edge portion from the upper side between the upper support portion. When the upper detection unit detects the presence of the edge (S67: yes), the bonding device moves the edge to one side (S69), and when the upper detection unit detects the absence of the edge (S67: no), the bonding device moves the edge to the other side (S71). The bonding device controls the lower nip roller to apply a rotational torque in a direction to move a portion of the sheet other than the edge portion to the other side (S65).

Description

Bonding device

Technical Field

The present invention relates to an adhesive bonding apparatus.

Background

Patent document 1 discloses a cloth bonding apparatus. The cloth bonding apparatus includes a nozzle, an upper support portion, an upper conveying roller, a lower conveying roller, an upper pinch roller, a lower pinch roller, an upper detecting portion, and a lower detecting portion. The nozzle sprays adhesive between the upper cloth and the lower cloth. The upper and lower conveying rollers sandwich the upper cloth passing from the upper side of the upper support portion and the lower cloth passing from the lower side of the upper support portion, and convey the upper cloth while adhering the upper cloth with an adhesive. The upper detecting unit detects an upper cloth passing over the upper side of the upper supporting unit. The upper pinch roller switches the rotation direction according to the detection result of the upper detection part, so that the upper cloth moves along the direction orthogonal to the conveying direction. The lower detecting portion detects a lower cloth passing from the lower side of the upper supporting portion. The lower pinch roller switches the rotation direction according to the detection result of the lower detection part, so that the lower cloth moves along the direction orthogonal to the conveying direction.

Prior art literature

Patent literature

Patent document 1: japanese patent laid-open publication No. 2019-178472

Disclosure of Invention

Problems to be solved by the invention

There is a demand for folding back an end portion of the cloth and bonding the folded back portion with an adhesive. In this case, the upper support portion is sandwiched by the cloth in the folded-back portion from the up-down direction. In this case, the cloth bonding apparatus described in patent document 1 has a problem that rotation control of the lower pinch roller according to the detection result of the lower detection unit cannot be performed.

The present invention aims to provide an adhesive device capable of adjusting the position of a sheet in a direction crossing a conveying direction by an upper clamping roller and a lower clamping roller and adhering the folded-back part of the sheet.

Solution for solving the problem

The present invention provides an adhesive device, which is characterized in that the adhesive device comprises: a conveying mechanism that conveys the sheet in a conveying direction; a lower support body that supports the sheet conveyed by the conveying mechanism from a lower side; a nozzle having an ejection port for ejecting an adhesive toward the sheet supported by the lower support; an upper support portion having a guide portion extending in the conveying direction at an end on one side in a specific direction intersecting both the conveying direction and the up-down direction, the upper support portion supporting, from below, an edge portion of the sheet folded back along the guide portion; a lower pinch roller protruding upward from the lower support body on an upstream side of the nozzle in the conveying direction and rotatable about an axis parallel to the conveying direction, the lower pinch roller pinching a portion of the sheet other than the edge portion from below between the lower surface of the upper support portion; an upper pinch roller rotatable about an axis parallel to the conveying direction and pinching the edge portion from above between the upper pinch roller and the upper support portion; a lower motor that drives the lower grip roller; an upper motor that drives the upper pinch roller; an upper detection portion that detects whether the edge portion is present at an upper detection position that is a predetermined position between the ejection orifice and the upper pinch roller in the conveying direction; and a control section that controls the conveying mechanism, the lower motor, and the upper motor, the control section performing the following processing: a 1 st control process, wherein when the upper detection unit detects that the edge portion exists at the upper detection position, the control unit performs the 1 st control process, controls the upper motor to drive and rotate the upper pinch roller, and moves the edge portion to the one side; a 2 nd control process, wherein when the upper detection unit detects that the edge portion is not present at the upper detection position, the control unit performs the 2 nd control process, and controls the upper motor to drive the upper pinch roller to rotate and move the edge portion to the other side; and a 3 rd control process of controlling the lower motor to apply a rotational torque to the lower nip roller in a direction to move a portion of the sheet other than the edge portion toward the other side.

The bonding device is driven in accordance with the detection result of the upper detection unit to rotate the upper pinch roller, and adjusts the position of the edge portion of the sheet in a specific direction. On the other hand, the bonding device is driven to rotate the lower nip roller so that the portion of the sheet other than the edge portion always tends to move to the other side in the specific direction. This makes it possible to suppress the occurrence of slackening of the sheet by applying tension in a specific direction to the sheet. Therefore, the bonding device can fold the sheet back in a state where the sheet extends straight, and bond the folded back portion with the adhesive.

In the present invention, the upper support portion may be capable of changing a position of the guide portion in the specific direction. In this case, the bonding device can adjust the width of the edge portion of the sheet in a specific direction.

In the present invention, the upper support portion may have: the guide part; and a base portion that movably supports the guide portion, the guide portion having: a guide body; and an extension portion extending from the guide body toward the other side of the specific direction, the base portion having: a support portion, which is a portion into which the extension portion enters, and which supports the extension portion so that the extension portion can slide in the specific direction; and a fixing portion fixing a position of the extension portion. The bonding device can easily adjust the position of the guide portion relative to the base portion and can stably maintain the adjusted position of the guide portion.

In the present invention, in the 3 rd control process, the lower motor may be controlled so that the rotation speed of the lower motor is constant. The bonding device can apply a certain tension to the sheet.

In the present invention, the one end portion of the guide portion in the specific direction may be curved in a state of being seen from a direction parallel to the conveying direction. The bonding means are capable of bending the crease of the sheet.

In the present invention, the upper end portion of the nozzle and the upper surface of the upper support portion may be positioned at the same height. The bonding device can smoothly convey the end of the sheet by suppressing the formation of a step between the upper support portion and the nozzle.

In the present invention, at least one of the lower nip roller and the upper nip roller may have a diameter-reduced portion that decreases in diameter as going toward the upstream side in the conveying direction. The bonding device can reduce the possibility that the sheet is caught on at least one of the lower pinch roller and the upper pinch roller, thereby interfering with conveyance of the sheet.

In the present invention, the bonding apparatus may further include a lower adjusting mechanism capable of adjusting a magnitude of a clamping force of the lower clamping roller to clamp a portion of the sheet other than the edge portion between the lower clamping roller and a lower surface of the upper supporting portion from below. The adhesive device can stably apply a certain tension to the sheet by adjusting the magnitude of the holding force according to the thickness and type of the cloth.

Drawings

Fig. 1 is a perspective view of the bonding apparatus 1.

Fig. 2 is a front view of the bonding apparatus 1.

Fig. 3 is a left side view of the bonding apparatus 1.

Fig. 4 is a perspective view of the upper conveyance mechanism 10B, the upper movement mechanism 10C, and the lower conveyance mechanism 10A.

Fig. 5 is a perspective view of the upper conveyance mechanism 10B and the lower conveyance mechanism 10A.

Fig. 6 is a perspective view of the lower conveying mechanism 10A.

Fig. 7 is a perspective view of the internal configuration of the lower conveying mechanism 10A.

Fig. 8 is a perspective view of the internal configuration of the lower conveying mechanism 10A.

Fig. 9 is a left side view of the cylindrical portion 32 (lower conveying roller 3A: lower contact position).

Fig. 10 is a left side view of the cylindrical portion 32 (lower conveying roller 3A: lower separated position).

Fig. 11 is a perspective view of the transfer mechanism 3F, the switching unit 3G, and the lower pinch roller 3C.

FIG. 12 is a perspective view of the nozzle moving mechanism 10D

Fig. 13 is a perspective view of the nozzle 6A.

Fig. 14 is a plan view of the nozzle 6A.

Fig. 15 is a right side view of the nozzle 6A.

Fig. 16 is a bottom view of the nozzle 6A.

Fig. 17 is a perspective view of the upper support portion 6B.

Fig. 18 is a perspective view of the upper conveying unit 10.

Fig. 19 is a perspective view of the upper conveyance mechanism 10B and the link mechanism 4E.

Fig. 20 is a perspective view of the link mechanism 4E, which is an internal structure of the upper conveyance mechanism 10B.

Fig. 21 is an exploded perspective view of the upper conveying mechanism 10B.

Fig. 22 is a right side view of the support arm 40 in the 3 rd arm position.

Fig. 23 is a left side view of the support arm 40 in the 3 rd arm position.

Fig. 24 is a right side view of the support arm 40 in the 2 nd arm position.

Fig. 25 is a left side view of the support arm 40 in the 2 nd arm position.

Fig. 26 is a right side view of the support arm 40 in the 1 st arm position.

Fig. 27 is a left side view of the support arm 40 in the 1 st arm position.

Fig. 28 is an electrical configuration diagram of the bonding apparatus 1.

Fig. 29 is a flowchart showing the main process.

Fig. 30 is a flowchart showing the main process, and is a flowchart next to fig. 29.

Fig. 31 is a flowchart showing the 1 st bonding process.

Fig. 32 is a flowchart showing the 2 nd bonding process.

Fig. 33 is a perspective view of the upper support portion 2A after the guide body 22A moves leftward as viewed from above.

Fig. 34 is a perspective view of the upper support portion 2A after the guide body 22A moves leftward as viewed from below.

Fig. 35 is a front view of the upper support portion 2A after the guide body 22A moves leftward.

Fig. 36 is a perspective view of the upper support portion 2A after the guide body 22A moves rightward when viewed from above.

Fig. 37 is a perspective view of the upper support portion 2A after the guide body 22A moves rightward when viewed from below.

Fig. 38 is a front view of the upper support portion 2A after the guide body 22A moves rightward.

Description of the reference numerals

1. An adhesive device; 2A, upper support part; 3C, a lower clamping roller; 5A, upper clamping rollers; 6A, a nozzle; 6B, an upper support; 10A, a lower conveying mechanism; 10B, an upper conveying mechanism; 21. a base; 22. a guide section; 22A, a guide body; 22B, an extension; 23. a fixing part; 30C, a lower motor; 32. a cylindrical portion; 39B, a reduced diameter portion; 50A, upper motor; 66D, a guide; 201. a CPU; 211. and a supporting part.

Detailed Description

Embodiments of the present invention will be described with reference to the accompanying drawings. In the following description, the left and right, front and back, and up and down, which are indicated by arrows in the drawings, are used. The bonding apparatus 1 bonds the upper sheet 9A and the lower sheet 9B with an adhesive (see fig. 12). The upper sheet 9A is overlapped with the lower sheet 9B from the upper side. The upper sheet 9A and the lower sheet 9B are, for example, cloth having flexibility. In the present embodiment, as an example, an edge portion of the sheet 90 folded back near the left end portion is the upper sheet 9A, and a portion of the sheet 90 other than the edge portion is the lower sheet 9B (see fig. 12). The bonding apparatus 1 bonds the lower sheet 9B and the upper sheet 9A with an adhesive.

< Structure outline of adhesive device 1 >)

The outline of the structure of the bonding apparatus 1 will be described with reference to fig. 1 to 3. As shown in fig. 1 and 2, the bonding apparatus 1 includes a base portion 1A, a pillar portion 1B, a arm portion 1C, and a head portion 1D. The base portion 1A is rectangular parallelepiped and is fixed to a table. The pillar portion 1B extends upward from the upper end portion of the base portion 1A. The arm portion 1C extends leftward from the upper end portion of the pillar portion 1B. The left end of the arm portion 1C is a nose portion 1D.

The base portion 1A supports the fixing portion 1E. The fixing portion 1E extends in the front-rear direction and is fixed to the left surface of the base portion 1A. The front portion of the fixing portion 1E extends forward of the front end of the base portion 1A, and supports the lower conveying mechanism 10A at the front end. The lower conveying mechanism 10A includes a lower conveying roller 3A, a nozzle lower roller 3B, a lower pinch roller 3C, a lower driving portion 3D (see fig. 8), and the like. The lower conveying roller 3A, the nozzle lower roller 3B, and the lower pinch roller 3C are respectively brought into contact with the lower sheet 9B from below. The lower conveying roller 3A, the nozzle lower roller 3B, and the lower pinch roller 3C are driven by the lower driving section 3D, respectively. The lower conveying roller 3A and the nozzle lower roller 3B convey the lower sheet 9B rearward. The lower pinch roller 3C moves the lower sheet 9B in the left-right direction. The lower conveying mechanism 10A will be described in detail later.

The nose portion 1D has an assembling portion 11 at an upper end, and the assembling portion 11 is used for assembling the liner. The mounting portion 11 has a box-shaped cover 11A extending upward from the upper surface of the nose portion 1D. The mounting portion 11 includes a housing portion, a heater 208 (see fig. 28), and the like in the cover 11A. The liner can be attached to and detached from the housing portion. The inner container accommodates a hot-melt adhesive. The adhesive becomes liquid at a predetermined temperature or higher and becomes solid at a temperature lower than the predetermined temperature. The heater 208 heats the liner accommodated in the accommodating portion, and melts the adhesive to become a liquid.

The bonding apparatus 1 includes a pump motor 210 (see fig. 28) for supplying the adhesive in the liner to the nozzle 6A (see fig. 3). By driving the pump motor 210, the adhesive in the liner is sucked.

As shown in fig. 1 to 3, the head 1D supports an upper conveying mechanism 10B (see fig. 3), an upper moving mechanism 10C (see fig. 1 and 2), a nozzle moving mechanism 10D, and the like. As shown in fig. 4, the upper conveying mechanism 10B includes an upper conveying roller 4A, an auxiliary conveying roller 4B, an upper conveying motor 4C, and the like. The upper conveying roller 4A and the auxiliary conveying roller 4B are driven by an upper conveying motor 4C, contact the upper sheet 9A from above, and convey the upper sheet 9A rearward. The upper moving mechanism 10C includes an upper pinch roller 5A, an upper driving portion 5B, and the like. The upper pinch roller 5A is driven by an upper driving portion 5B, contacts the upper sheet 9A from above, and moves the upper sheet 9A in the left-right direction. As shown in fig. 3, the nozzle moving mechanism 10D includes a nozzle 6A, an upper support portion 6B, and the like. The nozzle 6A ejects the adhesive between the upper sheet 9A and the lower sheet 9B. The upper support portion 6B is located above the lower sheet 9B, and supports the upper sheet 9A from the lower side. The upper conveying mechanism 10B, the upper moving mechanism 10C, and the nozzle moving mechanism 10D will be described in detail later.

As shown in fig. 1 and 2, the pillar portion 1B includes a switch 12 at the front left end portion. The switch 12 includes a plurality of buttons arranged in the up-down direction. When an operator desires to perform an operation instruction to the bonding apparatus 1, the operator inputs the switch 12.

< lower conveying mechanism 10A >)

As shown in fig. 6, the lower conveying mechanism 10A includes a housing portion 31 and a cylindrical portion 32. The housing portion 31 is connected to the front end of the fixing portion 1E (see fig. 1). The housing portion 31 has a box shape extending in the left-right direction, and is located on the front side of the base portion 1A, the pillar portion 1B, the arm portion 1C, and the nose portion 1D in the front-rear direction. The housing portion 31 houses the lower driving portion 3D and the switching portion 3G (see fig. 7). The housing portion 31 has a protruding portion 31A protruding rearward at the rear end and at the center in the lateral direction. As shown in fig. 3, a columnar support shaft 33 extending in the left-right direction is provided in the protruding portion 31A.

The cylindrical portion 32 has an elongated box shape, and extends rearward from the housing portion 31. The housing portion 31 is located on the front side with respect to the cylindrical portion 32. The upper surface of the cylindrical portion 32 is disposed on the same plane as the upper surface of the housing portion 31. The lower surface of the cylindrical portion 32 is disposed above the lower surface of the housing portion 31. The cylindrical portion 32 supports the lower sheet 9B from below.

The cylindrical portion 32 has a left wall 32L and an extension plate 34B (see fig. 7). The extension plate 34B forms the right side surface of the cylindrical portion 32. As shown in fig. 7, the cylindrical portion 32 accommodates the lower conveying roller 3A, the nozzle lower roller 3B, the lower pinch roller 3C, the belt 3E, and the transfer mechanism 3F. The left wall 32L has a plate shape extending parallel to the extension plate 34B. The left wall 32L forms the left side surface of the cylindrical portion 32.

A part of the front side of the cylindrical portion 32 is located in the protruding portion 31A of the housing portion 31. As shown in fig. 8, a hole 320A is provided in a portion of the extension plate 34B located in the protruding portion 31A of the housing portion 31. The hole 320A is located on the front side of the front-rear direction central portion of the extension plate 34B. A hole 320B is provided in a portion of the left wall 32L of the tubular portion 32 located in the protruding portion 31A of the housing portion 31. The hole 320B is located near the front end portion of the left wall 32L. The support shaft 33 provided in the protruding portion 31A of the housing portion 31 is inserted into the holes 320A and 320B. The housing portion 31 rotatably supports the cylindrical portion 32 via a support shaft 33 so that the cylindrical portion 32 is rotatable. A spring, not shown, biases the front portion of the tubular portion 32 upward.

The lower driving section 3D includes a lower gap motor 30A, a lower conveying motor 30B, a lower motor 30C, and a cylinder 30D. The lower gap motor 30A is a driving source for swinging the cylindrical portion 32 in the up-down direction. The lower conveying motor 30B is a driving source for rotating the lower conveying roller 3A and the nozzle lower roller 3B. The lower motor 30C is a driving source for rotating the lower pinch roller 3C. The air cylinder 30D is a driving source for moving the lower pinch roller 3C up and down.

The eccentric cam 34A is connected to a rotation shaft 301 extending leftward of the lower gap motor 30A. The eccentric cam 34A is a circular plate cam. The eccentric cam 34A is eccentric so that the distance between the outer periphery thereof and the rotation shaft 301 changes. The extension plate 34B extends upward from the left side of the lower gap motor 30A, is then bent to the rear side, and extends in the conveying direction. The extension plate 34B has a hole 341 at the front end portion. The hole 341 has an abutment portion 341A protruding inward. The diameter of the hole 341 becomes smaller at the abutment portion 341A. The eccentric cam 34A is located in the hole 341. The eccentric cam 34A is held in contact with the contact portion 341A by a spring that biases the front portion of the cylindrical portion 32 upward.

The position of the eccentric cam 34A that is in contact with the contact portion 341A of the hole 341 is switched with the eccentric cam 34A by rotating the lower gap motor 30A in the hole 341. In this case, the distance between the rotating shaft 301 of the lower gap motor 30A and the abutment portion 341A varies, and the tip end portion of the extension plate 34B moves in the up-down direction. The extension plate 34B rotates about the support shaft 33, and swings the rear end portion of the extension plate 34B in the up-down direction. In this case, the tubular portion 32 swings its rear end portion in the up-down direction about the support shaft 33. Specifically, as shown in fig. 9, when the front end portion of the extension plate 34B is moved downward by the rotation of the eccentric cam 34A (arrow Y11), the rear end portion of the cylindrical portion 32 is moved upward (arrow Y12). On the other hand, as shown in fig. 10, when the front end portion of the extension plate 34B is moved upward by the rotation of the eccentric cam 34A (arrow Y13), the rear end portion of the cylindrical portion 32 is moved downward (arrow Y14).

As shown in fig. 7 and 8, the cylindrical portion 32 accommodates the lower conveying roller 3A, the nozzle lower roller 3B, and the lower pinch roller 3C at the rear end portion. The lower conveying roller 3A is located at the rearmost end portion in the cylindrical portion 32. The cylindrical portion 32 rotatably supports the shaft 321 extending in the left-right direction by the rear end portion thereof. The shaft 321 is inserted into the lower conveying roller 3A and rotates together with the lower conveying roller 3A. Therefore, the cylindrical portion 32 rotatably supports the lower conveying roller 3A via the shaft 321 and the lower conveying roller 3A. The shaft 321 has a pulley 38A on the right side of the lower conveying roller 3A.

The nozzle lower roller 3B is adjacent to the lower conveying roller 3A at the front side of the cylindrical portion 32 with respect to the lower conveying roller 3A. The cylindrical portion 32 rotatably supports a shaft 322 extending in the left-right direction at a position on the front side of the shaft 321, the shaft 322. The shaft 322 is inserted into the nozzle lower roller 3B and rotates together with the nozzle lower roller 3B. Therefore, the cylindrical portion 32 rotatably supports the nozzle lower roller 3B via the shaft 322 so that the nozzle lower roller 3B can rotate. The shaft 322 has a pulley 38B on the right side of the nozzle lower roller 3B.

The lower pinch roller 3C is adjacent to the nozzle lower roller 3B at the front side of the cylindrical portion 32 with respect to the nozzle lower roller 3B. The lower pinch roller 3C is supported by a transmission mechanism 3F described later so as to be rotatable about a rotation axis extending parallel to the front-rear direction. As shown in fig. 11, the lower pinch roller 3C has a constant diameter portion 39A and a reduced diameter portion 39B. The constant diameter portion 39A is a portion having a constant diameter centered on the rotation axis. The reduced diameter portion 39B is adjacent to the constant diameter portion 39A in front of the constant diameter portion 39A. The diameter of the reduced diameter portion 39B is a portion whose diameter around the rotation axis decreases toward the front.

Hereinafter, as shown in fig. 12, the rotation direction of the lower pinch roller 3C in a state seen from the front side is defined. The clockwise direction is referred to as the lower 1 st rotation direction C21, and the counterclockwise direction is referred to as the lower 2 nd rotation direction C22. The lower 1 st rotation direction C21 is a rotation direction in which the upper end of the lower pinch roller 3C goes to the right. The lower 2 nd rotation direction C22 is a rotation direction in which the upper end of the lower pinch roller 3C goes to the left.

As shown in fig. 6, the cylindrical portion 32 has covers 323, 35. The cover 323 is plate-shaped extending in the front-rear direction, and is fixed to the upper end portion of the extension plate 34B and the upper end portion of the left wall 32L, forming the upper surface of the front side portion of the cylindrical portion 32. The cover 323 has a notch 32C at the rear end portion, which is formed by leaving the cover 323 one piece in front. The lower pinch roller 3C is located below the notch 32C. The rear end portion of the cylindrical portion 32 has an opening 35A at the upper surface thereof and at the rear side of the cover 323. The lower conveying roller 3A and the nozzle lower roller 3B are located below the opening 35A. The plate-like cover 35 is made of metal. The cover 35 can be attached to the cylindrical portion 32 by the magnetic force of a magnet provided at the rear upper end portion of the extension plate 34B and the left wall 32L. The cover 35 closes the opening 35A in a state of being attached to the cylindrical portion 32.

The cover 35 has a notch 32A and a hole 32B. The notch 32A is a portion formed by leaving the rear end portion of the cover 35 one piece forward. The hole 32B is provided on the front side of the notch 32A and has a substantially rectangular shape in plan view. The lower conveying roller 3A is located below the notch 32A, and an upper end portion of the lower conveying roller 3A slightly protrudes upward from the notch 32A. The nozzle lower roller 3B is located below the hole 32B, and the upper end portion of the nozzle lower roller 3B slightly protrudes upward from the hole 32B.

When the cylindrical portion 32 is swung by driving the lower gap motor 30A, the lower conveying roller 3A and the nozzle lower roller 3B move in the up-down direction (see fig. 9 and 10). When the rear end portion of the tubular portion 32 is moved upward by the driving of the lower gap motor 30A, a gap between the nozzle 6A and the cap 35 described later becomes smaller. As shown in fig. 9, when the rear end portion of the tubular portion 32 is moved to the uppermost position, a gap between the nozzle 6A and the cap 35, which will be described later, is minimized. The positions of the lower conveying roller 3A and the nozzle lower roller 3B in this case are referred to as a lower contact position.

When the rear end portion of the tubular portion 32 is moved downward by the driving of the lower gap motor 30A, a gap between the nozzle 6A and the cap 35 described later becomes large. As shown in fig. 10, when the rear end portion of the tubular portion 32 moves to the lowermost position, a gap between the nozzle 6A and the cap 35, which will be described later, is maximized. The positions of the lower conveying roller 3A and the nozzle lower roller 3B in this case are referred to as a lower separation position.

As shown in fig. 8, the lower conveying motor 30B is fixed to the right side surface of the front end portion of the extension plate 34B. The rotation shaft of the lower conveying motor 30B extends leftward and protrudes leftward from a hole 34H provided in the extension plate 34B. The rotating shaft has a pulley at a tip end. The belt 3E is stretched between a pulley 38A provided on a shaft 321 inserted in the lower conveying roller 3A, a pulley 38B provided on a shaft 322 inserted in the nozzle lower roller 3B, and a pulley of the lower conveying motor 30B. The belt 3E extends in the conveying direction within the cylindrical portion 32. The belt 3E transmits the driving force of the lower conveying motor 30B to the lower conveying roller 3A and the nozzle lower roller 3B via pulleys 38A, 38B. The lower conveying roller 3A and the nozzle lower roller 3B rotate in accordance with the driving of the lower conveying motor 30B. The pulleys 38A and 38B have the same diameter. Accordingly, the lower conveying roller 3A and the nozzle lower roller 3B are driven to rotate in the same direction at the same speed in accordance with the driving of the lower conveying motor 30B.

The lower conveying roller 3A and the nozzle lower roller 3B support the lower sheet 9B from below, and convey the lower sheet 9B to the downstream side in the conveying direction by rotating.

As shown in fig. 8 and 11, the lower motor 30C is provided to the left of the extension plate 34B. The rotation shaft of the lower motor 30C extends to the rear side. The transmission mechanism 3F has a support portion 37A, an arm portion 37B, an extension portion 36, a belt 36A, and pulleys 36B, 36C. The support portion 37A has a box shape and is provided on the rear side of the lower motor 30C. The support portion 37A has a hole 371 penetrating in the front-rear direction. The arm 37B accommodates the belt 36A inside, and the arm 37B is fixed to the lower motor 30C. The arm 37B has a connecting plate portion 372, a cylindrical portion 373, a cylindrical portion 374, and a connecting portion 375.

The coupling plate 372 is fixed to the rear surface of the lower motor 30C. The web 372 has a rectangular shape when viewed from the rear. The cylindrical portion 373 extends rearward from the rear surface of the connecting plate portion 372 and has a circular shape when viewed from the rear. The cylindrical portion 373 and the connecting plate portion 372 have holes penetrating in the front-rear direction, and the holes are located on the front side of the holes 371 of the support portion 37A. The cylindrical portion 374 has a circular shape when viewed from the rear, and extends in the front-rear direction inside the hole 371 of the support portion 37A, the cylindrical portion 373, and the hole portion of the connecting plate portion 372. The rear portion of the cylindrical portion 374 is located at a rear side of the support portion 37A. The front portion of the cylindrical portion 374 is fixed to the cylindrical portion 373. The support portion 37A rotatably supports the cylindrical portion 374 in the cylindrical portion 374. The support portion 37A has a limiting plate 335 extending forward and having a plate shape on the left surface.

The coupling portion 375 is fixed to the rear end portion of the cylindrical portion 374. The joint 375 has a base 375A and plate portions 375B, 375C. The base 375A is fixed to the rear end portion of the cylindrical portion 374 with four screws 370. The base 375A has a front-rear direction thickness. The base 375A has a notch 376 formed by cutting one piece from the upper right to the lower left.

The arc-shaped plate portion 375B extends rightward and upward from the front end of the base portion 375A. The arc-shaped plate portion 375C extends rightward and upward from the rear end of the base portion 375A. The upper right portions of the plate portions 375B, 375C rotatably support the extension portion 36 in such a manner that the extension portion 36 is rotatable. The extension 36 extends in the front-rear direction inside the cylindrical portion 32. A lower pinch roller 3C is fixed to the rear end portion of the extension 36. The lower pinch roller 3C rotates about a rotation axis parallel to the conveying direction, and moves the lower sheet 9B in the left-right direction.

The drive shaft 302 passes through a hole provided inside the cylindrical portion 374 and extends inside the notch 376 of the connecting portion 375. The front end of the drive shaft 302 is coupled to the output shaft of the lower motor 30C, and is rotated by the lower motor 30C. The pulley 36B is provided at the rear end portion of the drive shaft 302. Pulley 36C is provided in the portion of extension 36 between plate portion 375B and plate portion 375C. The belt 36A is stretched over pulleys 36B, 36C. Arm 37B accommodates belt 36A between plate 375B and plate 375C and inside notch 376. When the lower motor 30C is driven, the lower pinch roller 3C is rotated by the drive shaft 302, the pulley 36B, the belt 36A, the pulley 36C, and the extension 36.

The switching section 3G moves the lower pinch roller 3C up and down. The switching unit 3G has a cylinder 30D at a position to the left of the support unit 37A. The rod 331 of the cylinder 30D extends upward. The lever 331 has an abutment portion 331A at an upper end portion. The contact portion 331A is cylindrical.

The lever portion 332 extends leftward from the cylindrical portion 373 of the arm portion 37B. The cylindrical portion 374 has a stem portion 345 on the rear left surface. The stem 345 extends to the left. The upper end of the spring 342 is locked to the rod 345. The lower end of the spring 342 is locked to a bolt 343 fixed to the support 37A.

The support portion 37A rotatably supports the cylindrical portion 374 of the arm portion 37B so that the cylindrical portion 374 of the arm portion 37B is rotatable. Therefore, the arm 37B can swing around the drive shaft 302 of the lower motor 30C. The spring 342 biases the lever 345 downward, and thereby biases the lower pinch roller 3C upward via the arm 37B. In a state where the rod 331 of the air cylinder 30D moves downward, the lower pinch roller 3C is positioned at the uppermost position. The position of the lower pinch roller 3C at the uppermost position is referred to as a lower pinch position. In this case, the upper end of the lower pinch roller 3C slightly protrudes upward from the notch 32C and can be brought into contact with the lower sheet 9B.

In a state where the rod 331 of the cylinder 30D is moved upward, the abutting portion 331A moves the rod 332 upward. With the movement of the lever 332, the arm 37B swings around the drive shaft 302 against the urging force of the spring 342. In this case, the lower pinch roller 3C moves downward. When the lever 332 moves upward to contact the restricting plate 335, the lower pinch roller 3C is positioned at the lowest position. The position of the lower pinch roller 3C at the lowest position is referred to as a lower position. The lower pinch roller 3C is located below the notch 32C and is separated from the lower sheet 9B below.

When the lower pinch roller 3C is in the lower pinch position, it contacts the lower sheet 9B from below, sandwiching the lower sheet 9B between it and an upper support portion 6B (described later). In this state, the transmission mechanism 3F transmits the driving force of the lower motor 30C to the lower pinch roller 3C, and at this time, the lower pinch roller 3C rotates to move the lower sheet 9B in the left-right direction.

< nozzle movement mechanism 10D >)

As shown in fig. 12, the nozzle moving mechanism 10D includes a nozzle support portion 60, a nozzle 6A, an upper support portion 6B, a nozzle motor 69A (see fig. 28), a support shaft 690, and a heater 209 (see fig. 28). The nozzle support 60 extends in the up-down direction. The upper end of the nozzle support portion 60 is swingably supported by the lower end of the nose portion 1D (see fig. 1 to 3). The nozzle support portion 60 is swingable about a support shaft 690 extending in the left-right direction. The nozzle 6A and the upper support portion 6B are provided at the lower end portion of the nozzle support portion 60, and protrude downward. The nozzle 6A moves between a close position (see fig. 1 to 3 and 12) and a retracted position in response to the swing of the nozzle support portion 60. The nozzle 6A at the approaching position approaches the cylindrical portion 32 of the lower conveying mechanism 10A from above. The nozzle 6A in the retracted position is separated forward from the nozzle 6A in the near position (see fig. 2 and 3). The nozzle support unit 60 supports the nozzle 6A so that the nozzle 6A can move between the approach position and the retreat position. The nozzle 6A and the upper support portion 6B will be described in detail later.

The nozzle motor 69A is provided on the left side inside the nose portion 1D. The nozzle support 60 swings about the support shaft 690 by the rotation of the nozzle motor 69A. The support shaft 690 has a flow path for the adhesive therein. The pump motor 210 (see fig. 28) supplies the adhesive sucked from the liner accommodated in the accommodating portion to the flow path in the support shaft 690. The heater 209 heats the adhesive in the flow path.

< nozzle 6A >)

The nozzle 6A will be described with reference to fig. 13 to 16. The nozzle 6A has an extension support portion 67A, an extension setting portion 67B, and an extension portion 67C. The extension support 67A is connected to the lower end of the nozzle support 60 (see fig. 12). The extension support 67A has a hole 600 (see fig. 14) that communicates with a flow path of the adhesive provided in the nozzle support 60. The extension portion 67B extends downward from the extension support portion 67A. The extension portion 67C horizontally extends from the lower end of the extension portion 67B toward the right. The nozzle 6A has an adhesive supply path so as to extend over the inside of each of the extension support portion 67A, the extension portion 67B, and the extension portion 67C.

As shown in fig. 14 and 15, the upper surface of the extension 67C has a 1 st upper surface 673, a 2 nd upper surface 674, and a 3 rd upper surface 675. The 1 st upper surface 673 extends horizontally continuously from the connection portion with the extension portion 67B to the right end portion of the extension portion 67C. The 2 nd upper surface 674 is disposed on the right side of the substantially center of the extending portion 67C in the left-right direction and is slightly behind the front end portion in the front-rear direction. The 2 nd upper surface 674 is inclined downward from the front end portion toward the rear end portion. The 3 rd upper surface 675 is located at a portion surrounded by the 2 nd upper surface 674 and extends horizontally.

As shown in fig. 15 and 16, the lower surface of the extension 67C has a 1 st lower surface 670A and a 2 nd lower surface 670B. The 1 st lower surface 670A is continuously formed between the portion on the right side of the substantially center of the extending portion 67C in the left-right direction from the connecting portion with the extending portion 67B. The 2 nd lower surface 670B is continuously formed from a portion on the right side of the substantially center of the extending portion 67C in the left-right direction to the right end portion.

The 1 st lower surface 670A has a planar shape and extends horizontally. The cross section of the 2 nd lower surface 670B is curved in an arc shape when seen from the left-right direction. The front end of the 2 nd lower surface 670B is located below the 1 st lower surface 670A, and the rear end of the 2 nd lower surface 670B is located above the 1 st lower surface 670A. A step is formed at the interface between the 1 st lower surface 670A and the 2 nd lower surface 670B.

As shown in fig. 16, a plurality of ejection ports 68 are provided on the front end side of the 2 nd lower surface 670B. The supply path of the nozzle 6A communicates with a plurality of discharge ports 68. The adhesive supplied from the liner flows through the supply path of the nozzle 6A and is discharged downward from the plurality of discharge ports 68.

The plurality of discharge ports 68 have a plurality of left discharge ports 68A and a plurality of right discharge ports 68B. The plurality of left-side ejection orifices 68A and the plurality of right-side ejection orifices 68B each have two ejection orifices 68. The plurality of left side discharge ports 68A are arranged in the left-right direction, and the plurality of right side discharge ports 68B are arranged in the left-right direction. The plurality of left side discharge ports 68A and the plurality of right side discharge ports 68B are aligned in a straight line in the left-right direction.

The plurality of left discharge ports 68A are disposed on the left side with respect to the plurality of right discharge ports 68B. The discharge port located on the right side of the plurality of left discharge ports 68A and the discharge port located on the left side of the plurality of right discharge ports 68B are separated in the left-right direction. The plurality of left discharge ports 68A are arranged on the left side with respect to the protrusion 671.

A protrusion 671 is provided at a portion of the 2 nd lower surface 670B located between the plurality of left side ejection orifices 68A and the plurality of right side ejection orifices 68B. As shown in fig. 15, the protrusion 671 protrudes downward from the 2 nd lower surface 670B of the extension 67C, and extends to a position below the 1 st lower surface 670A. The lower surface 671A of the protrusion 671 has a quadrangular shape, and the lower surface 671A of the protrusion 671 extends horizontally in a state where the nozzle 6A is in the close position. The interval in the up-down direction between the lower surface 671A of the protrusion 671 and the 2 nd lower surface 670B of the extension 67C corresponds to the protrusion amount L11 of the protrusion 671. The protruding amount L11 of the protruding portion 671 is adjusted to be not less than 0.1mm and not more than 0.4 mm.

As shown in fig. 16, a distance in the left-right direction between the left-side ejection orifice of the plurality of left ejection orifices 68A and the right-side ejection orifice of the plurality of right ejection orifices 68B is denoted by L21. The interval L21 corresponds to a length in the left-right direction between the leftmost ejection orifice of the plurality of ejection orifices 68 and the rightmost ejection orifice of the plurality of ejection orifices 68. The length of the lower surface 671A of the protrusion 671 in the left-right direction is denoted by L22. The ratio of the length L22 to the interval L21 (L22/L21) is adjusted to 15% or more and 55% or less.

As shown in fig. 9, the nozzle 6A at the approaching position is located forward of the lower conveying roller 3A and rearward of the lower pinch roller 3C in the front-rear direction. The extension 67C of the nozzle 6A at the close position is located above the nozzle lower roller 3B, opposite to the nozzle lower roller 3B in the up-down direction.

< upper support portion 6B >)

As shown in fig. 17, the upper support portion 6B includes a coupling portion 66A and extension portions 66B and 66C. The coupling portion 66A is coupled to the lower end of the nozzle support portion 60 and is positioned forward of the nozzle 6A (see fig. 12). The extension portion 66B extends downward from the coupling portion 66A. The extension 66C extends horizontally from the lower end of the extension 66B toward the right. The extension 66C has a plate shape. The portion of the extension portion 66C including the right end portion is referred to as a guide portion 66D. The guide portion 66D extends in the front-rear direction. The right end portion of the guide portion 66D is curved so as to protrude rightward in a state of being seen from the front-rear direction.

As shown in fig. 12, the sheet 90 is folded back by the guide portion 66D in the vicinity of the right end portion. The lower sheet 9B is located on the lower side of the extension 66C, and the upper sheet 9A is located on the upper side of the extension 66C. The upper sheet 9A is supported from below by the extension 66C.

The extension portion 66C has a protruding portion 661 protruding rearward from the vicinity of the right end. The rear end portion of the protruding portion 661 extends to the vicinity of the front end portion of the extending portion 67C of the nozzle 6A. The extension 66C has a reflection portion 660 on the upper surface. The reflection unit 660 reflects light emitted from a light emitting unit of the upper detection unit 6E described later toward a light receiving unit.

When the nozzle 6A is in the close position, the upper support portion 6B is positioned on the front side of the nozzle 6A. More specifically, the connecting portion 66A and the extending portions 66B and 66C of the upper support portion 6B are located on the front sides of the extending support portion 67A, the extending portion 67B and the extending portion 67C of the nozzle 6A, respectively. The upper surface 662 of the extension portion 66C of the upper support portion 6B and the 1 st upper surface 673 of the nozzle 6A are located at the same height in the up-down direction.

When the nozzle 6A is in the close position, the extended portion 66C of the upper support portion 6B faces the lower pinch roller 3C above the lower pinch roller 3C. The extension 66C nips the lower sheet 9B with the lower nip roller 3C. Further, the lower pinch roller 3C moves up and down by the switching portion 3G of the lower conveying mechanism 10A, and accordingly, the pinching force for pinching the lower sheet 9B between the lower pinch roller 3C and the extended portion 66C can be adjusted.

< upper detection portion 6E >)

As shown in fig. 12, the upper detection unit 6E is fixed to the nose portion 1D. The upper detection unit 6E includes a light emitting unit and a light receiving unit. The light emitting portion emits light toward the reflecting portion 660 of the extension portion 66C of the upper support portion 6B. The light receiving portion can receive the light emitted from the light emitting portion and reflected by the reflecting portion 660. The position where the upper sheet 9A overlaps on the path of the light emitted from the light emitting portion is referred to as an upper detection position P. The upper detection position P is located between the ejection port 68 of the nozzle 6A and the lower pinch roller 3C in the front-rear direction. The upper detection portion 6E can detect whether the upper sheet 9A is at the upper detection position P.

< upper conveying Unit 10 >)

As shown in fig. 4, 5, and 18, an upper conveying mechanism 10B and an upper moving mechanism 10C, which will be described later, are provided in the upper conveying unit 10. The upper conveying unit 10 is mounted on a frame constituting a head 1D (see fig. 1) of the bonding apparatus 1. The upper conveying unit 10 includes a base portion 71 and an attachment portion 72. The base portion 71 is in the form of a plate extending horizontally. The upper conveying mechanism 10B and the upper moving mechanism 10C are fixed to the base portion 71. The fitting portion 72 detachably fits the upper conveying mechanism 10B and the upper moving mechanism 10C fixed to the base portion 71 to the frame of the head portion 1D of the bonding apparatus 1. The fitting portion 72 extends upward from the right rear end of the base portion 71, and is bent leftward at an upper portion.

The fitting portion 72 includes a unit position adjusting portion 75, and the unit position adjusting portion 75 can adjust the position of the upper conveying unit 10 in the left-right direction with respect to the bonding apparatus 1. The unit position adjusting portion 75 has long holes 77 to 79 extending in the left-right direction. The long holes 77 to 79 have the same shape and penetrate in the front-rear direction. The screw is inserted through the long holes 77 to 79 and fastened to a screw hole provided in the frame of the head portion 1D of the bonding apparatus 1, whereby the upper conveying unit 10 is fixed to the frame of the head portion 1D of the bonding apparatus 1. The long holes 77, 78 are arranged in the left-right direction at the upper portion of the fitting portion 72. Slot 77 is to the right of slot 78. The long hole 79 is located below the long hole 77.

The fitting portion 72 is disposed inside the head portion 1D in a state where the upper conveying unit 10 is fitted to the frame body of the head portion 1D of the bonding apparatus 1. By adjusting the positions of the long holes 77 to 79 with respect to the screws, the unit position adjusting unit 75 can adjust the position of the upper conveying unit 10 in the left-right direction with respect to the bonding apparatus 1.

< upper conveying mechanism 10B >)

As shown in fig. 19 and 20, the upper conveying mechanism 10B includes an upper conveying roller 4A, an auxiliary conveying roller 4B, a support arm 40, an upper conveying motor 4C, a roller unit 4D, a link mechanism 4E, an air cylinder 4F, and a spring 4G.

As shown in fig. 19, the support arm 40 has an elongated rod shape. The support arm 40 extends obliquely downward from the rear end portion toward the front end portion. The support arm portion 40 has an upper wall 40U, a right wall 40R, and a left wall 40L each having an elongated plate shape (see fig. 20). A frame 400L is provided on the left surface of the rear end portion of the left wall 40L.

As shown in fig. 20, a rotation shaft 41 extending in the left-right direction is inserted into the front end portion of the right wall 40R and the front end portion of the left wall 40L of the support arm 40. The rotation shaft 41 is rotatably supported by the right wall 40R and the left wall 40L. The right end portion of the rotation shaft 41 protrudes rightward from the right wall 40R. A pulley 41B is provided at a portion of the rotation shaft 41 protruding rightward from the right wall 40R. The left end portion of the rotation shaft 41 protrudes leftward from the left wall 40L. An upper conveying roller 4A is provided at a portion of the rotation shaft 41 protruding leftward from the left wall 40L. A pulley 41A is provided at a portion of the rotation shaft 41 sandwiched between the right wall 40R and the left wall 40L. The upper conveying roller 4A and the pulleys 41A and 41B rotate with the rotation of the rotary shaft 41.

The swinging plate 43A is provided between the right wall 40R and the pulley 41B in the left-right direction. The swing plate 43A is orthogonal to the left-right direction. The rotation shaft 41 is inserted into a hole, not shown, provided in the rear end portion of the swing plate 43A. The swing plate 43B is provided between the left wall 40L and the upper conveying roller 4A in the left-right direction. The swing plate 43B is orthogonal to the left-right direction. The rotation shaft 41 is inserted into a hole, not shown, provided in the rear end portion of the swing plate 43B. A mounting portion 43C is provided between the swing plates 43A and 43B. The swing plates 43A, 43B and the mounting portion 43C can swing around the rotation shaft 41.

A rotation shaft 42 extending in the left-right direction is inserted into a hole provided in the tip end portion of each of the swing plates 43A, 43B. The rotation shaft 42 is rotatably supported by the swing plates 43A and 43B. The right end portion of the rotation shaft 42 protrudes rightward from the swing plate 43A. A pulley 42A is provided at a portion of the rotation shaft 42 protruding rightward from the swing plate 43A. The left end portion of the rotation shaft 42 protrudes leftward from the swing plate 43B. An auxiliary conveying roller 4B is provided at a portion of the rotation shaft 42 protruding leftward from the swing plate 43B. The auxiliary conveying roller 4B is disposed on the front side with respect to the upper conveying roller 4A. The diameter of the auxiliary conveying roller 4B is smaller than that of the upper conveying roller 4A. The auxiliary conveying roller 4B and the pulley 42A rotate with the rotation of the rotary shaft 42. The auxiliary conveying roller 4B and the pulley 42A oscillate in accordance with the oscillation of the oscillating plates 43A, 43B about the rotation shaft 41.

A belt 44 is stretched between the pulleys 41B and 42A. The transmission belt 44 transmits a rotational driving force acting on the rotation shaft 41 to the rotation shaft 42 via the pulley 42A. The tension roller 45 is rotatably supported on the right surface of the swing plate 43A. The tension roller 45 is in contact with the belt 44 to adjust the tension acting on the belt 44 to be equal to or higher than a predetermined value.

As shown in fig. 19, a cover 46A is provided on the right surface of the swing plate 43A. The cover 46A covers the pulleys 41B, 42A, the belt 44, and the tension roller 45 (see fig. 20). A cover 46B is provided around the rotation shaft 42 and the mounting portion 43C.

The rotation shafts 41, 42, pulleys 41A, 41B, 42A, swing plates 43A, 43B, the mounting portion 43C, the belt 44, the tension roller 45, and the covers 46A, 46B shown in fig. 19 shown in fig. 20 form a roller unit 4D. The roller unit 4D is swingably supported by the front end portion of the support arm 40. The roller unit 4D rotatably supports the upper conveying roller 4A and the auxiliary conveying roller 4B with respect to the upper conveying roller 4A and the auxiliary conveying roller 4B. That is, the support arm 40 rotatably supports the upper conveying roller 4A and the auxiliary conveying roller 4B via the roller unit 4D.

As shown in fig. 20, the swing plate 43A of the roller unit 4D has a protruding portion 461 protruding rearward at the rear end portion. A bent plate-like attachment portion 462 is attached to the right wall 40R of the support arm 40 above the protruding portion 461. The attachment portion 462 extends upward along the right wall 40R, and extends rightward after bending the upper end portion rightward. The lower end portion of the mounting portion 462 is fixed to the right wall 40R by a screw 460. A spring 4G is mounted between the rear end of the protruding portion 461 and the right end of the mounting portion 462. The spring 4G is a tension spring. The spring 4G functions as a biasing member that biases the roller unit 4D in a counterclockwise direction when viewed from the right side. In the case where the roller unit 4D swings in the counterclockwise direction in a state seen from the right side, the upper end portion of the protruding portion 461 comes into contact with the screw 460. The screw 460 functions as a stopper that restricts the counterclockwise swing of the roller unit 4D when viewed from the right side.

The upper conveying motor 4C is provided to the left of the rear end portion of the support arm portion 40. The upper conveying motor 4C drives the upper conveying roller 4A and the auxiliary conveying roller 4B.

As shown in fig. 21, the output shaft 411 of the upper conveyance motor 4C extends rightward and is connected to the connection shaft 412 via the connection member 413. The connecting shaft 412 is inserted through holes provided in the right wall 40R and the left wall 40L of the support arm 40. The coupling shaft 412 is rotatably supported by bearings, not shown, provided in the holes of the left wall 40L and the right wall 40R, respectively. That is, the upper conveying motor 4C is supported by the support arm 40 via the connecting shaft 412. A shaft mount 952 is connected to the right end portion of the connecting shaft 412. As shown in fig. 19 and 20, the shaft mount 952 is coupled to a portion of the coupling shaft 412 protruding rightward from the right wall 40R.

As shown in fig. 21, a pulley 41C is connected to a portion of the connecting shaft 412 sandwiched between the right wall 40R and the left wall 40L in the left-right direction. A belt 414 is stretched between the pulleys 41A and 41C. As shown in fig. 20, the belt 414 is disposed between the right wall 40R and the left wall 40L of the support arm 40, that is, in the support arm 40.

The rotational driving force of the upper conveying motor 4C is transmitted to the upper conveying roller 4A via the output shaft 411, the coupling member 413, the coupling shaft 412, the pulley 41C, the transmission belt 414, the pulley 41A, and the rotation shaft 41. The upper conveying roller 4A rotates about the rotation shaft 41. The rotational driving force of the upper conveying motor 4C is transmitted to the auxiliary conveying roller 4B via the output shaft 411, the coupling member 413, the coupling shaft 412, the pulley 41C, the belt 414, the pulley 41A, the rotary shaft 41, the pulley 41B, the belt 44, the pulley 42A, and the rotary shaft 42. The auxiliary conveying roller 4B rotates about the rotation shaft 42.

In the upper conveying mechanism 10B, the diameters of the pulleys 41B, 42A are adjusted so that the peripheral speeds of the upper conveying roller 4A and the auxiliary conveying roller 4B, which rotate in accordance with the rotational drive of the upper conveying motor 4C, coincide.

< linkage 4E >

As shown in fig. 19 to 21, the link mechanism 4E includes a 1 st link 91 and a 2 nd link 92. The rear end portion of the support arm portion 40 rotatably supports the 1 st link 91 at the lower end portion thereof, and the 1 st link 91 is rotatable about the upper end portion thereof. The 1 st link 91 has a T-shape in a front view, and includes a main body 912, an arm 913, and connecting shafts 914 and 951. The main body 912 has a rod shape and extends in the left-right direction. The arm portion 913 extends downward from the center of the main body portion 912 in the lateral direction. The lower end portion of the arm portion 931 is coupled to the rear end portion of the left wall 40L of the support arm portion 40 via a coupling shaft 951. The connection shaft 951 extends in the left-right direction. The lower end portion of the arm portion 913 of the 1 st link 91 is rotatably supported by the rear end portion of the support arm portion 40 by the 1 st link 91. The coupling shaft 914 extends in the left-right direction. The coupling shaft 914 penetrates the main body 912 in the left-right direction. The coupling shaft 914 is supported by the base portion 71. The 1 st link 91 is supported by the base portion 71 so as to be rotatable about the connecting shaft 914.

The 2 nd link 92 is provided on the front side with respect to the 1 st link 91. The 2 nd link 92 has an inverted U-shape in a front view, and includes a main body 927, a recess 921, arm portions 922 and 923, and a connecting shaft 926. The main body portion 927 is an upper portion of the 2 nd link 92. The concave portion 921 is recessed upward from the lower end of the 2 nd link 92. The concave portion 921 is located between the arm portions 922, 923 in the left-right direction. The arm 922 extends downward from the right lower portion of the main body 927. The arm portion 923 extends downward from the left lower portion of the main body portion 927. The support arm 40 is disposed in the recess 921 of the 2 nd link 92. The arm 922 is to the right of the right wall 40R. The arm portion 923 is located to the left of the left wall 40L.

Holes extending in the left-right direction are provided at the lower end portions of the arm portions 922, 923. The connecting shaft 412 is inserted through the hole. The lower ends of the arm portions 922, 923 of the 2 nd link 92 are rotatably supported by the support arm portion 40 at a position between the front end and the rear end thereof in the 2 nd link 92. That is, the output shaft 411, the connecting shaft 412, and the holes of the arm portions 922, 923 of the 2 nd link 92 of the upper conveying motor 4C are arranged along a common axis extending in the left-right direction, respectively. The 2 nd link 92 is supported by the base portion 71 so as to be rotatable about the connecting shaft 926.

As shown in fig. 19 and 20, the 1 st link 91 and the 2 nd link 92 constitute a four-joint link mechanism together with the support arm 40. The end of the 1 st link 91 where the coupling shaft 914 is located and the end of the 2 nd link 92 where the coupling shaft 926 is located are fixed ends. The end of the 1 st link 91 where the connecting shaft 951 is located and the end of the 2 nd link 92 where the connecting shaft 412 (see fig. 21) is located are free ends.

The cylinder 4F can transmit power to the support arm 40 via the connecting link mechanism 120, and thereby can move the tip end portion of the support arm 40 up and down. The cylinder 4F extends in the front-rear direction. The output shaft 103 (see fig. 24 and 26) of the cylinder 4F extends forward from the body 400 of the cylinder 4F. The output shaft 103 is coupled to a piston provided in the body 400. The cylinder 4F can move the output shaft 103 coupled to the piston forward and backward. The fixing portion 104 is provided at the rear of the cylinder 4F. The fixing portion 104 fixes the cylinder 4F to the lower surface of the base portion 71 (see fig. 4, 5, etc.).

The connecting link mechanism 120 is connected to the output shaft 103 of the cylinder 4F and the support arm 40. The connecting link mechanism 120 includes links 122, 125, 126, connecting shafts 123, 124, 127, 128, and a connecting portion 129. The connecting shafts 124, 127, 128 are rod-like members extending in the left-right direction. The lower end portion of the link 125 is rotatably supported by the support arm portion 40 by the link 125. Specifically, the link 125 is a pair of right and left plates extending vertically on both sides of the support arm 40 in the right and left direction, and the link 125 has a connecting shaft 128 protruding toward the support arm 40 at the lower end portion. The coupling shaft 128 is inserted through holes provided in the right wall 40R and the left wall 40L of the support arm 40. The upper end of the link 125 is coupled to the rear end of the link 126 via a coupling shaft 124. The link 126 is a plate-like member, and is located between the pair of right and left links 125. The front end portion of the link 126 is fixed to the connecting shaft 127, and is connected to the upper end of the link 122 via the connecting shaft 127. The coupling shaft 127 is rotatably supported by the base portion 71. The link 122 is disposed right of the links 125 and 126 in the left-right direction. The link 122 is a rectangular plate-like member, and has a recess recessed upward at a lower end portion. The lower end of the link 122 is connected to the front end of the connecting portion 129 via a connecting shaft 123. The connecting portion 129 is disposed in a recess of the link 122. The connection portion 129 extends in the front-rear direction and is connected to the output shaft 103 of the cylinder 4F.

The support arm 40 is movable between the 1 st arm position (fig. 26 and 27), the 2 nd arm position (fig. 24 and 25), and the 3 rd arm position (fig. 22 and 23) by driving of the cylinder 4F. The 3 rd arm position is a position of the support arm portion 40 in a state where the tip portion is moved to the uppermost position. The 1 st arm position is a position of the support arm 40 in a state where the tip portion is moved to the lowermost position. The 2 nd arm position is a position of the support arm portion 40 where the tip portion is located between the 1 st arm position and the 3 rd arm position.

As shown in fig. 22 and 23, the support arm 40 is disposed at the 3 rd arm position in a state where the output shaft 103 of the cylinder 4F is moved to the rearmost side. In a state where the support arm 40 is disposed at the 3 rd arm position, the upper conveying roller 4A is separated upward from the lower conveying roller 3A (see fig. 6 and the like), and a gap is formed between the upper conveying roller 4A and the lower conveying roller 3A. The auxiliary conveying roller 4B is spaced upward from the upper support portion 6B (see fig. 6, etc.), and a gap is formed between the auxiliary conveying roller 4B and the upper support portion 6B. The position of the upper conveying roller 4A in the state where the support arm 40 is disposed at the 3 rd arm position is referred to as a 3 rd upper conveying position. The position of the auxiliary conveying roller 4B in the state where the support arm 40 is disposed at the 3 rd arm position is referred to as a 2 nd auxiliary position.

As shown in fig. 22, in the state where the support arm 40 is disposed at the 3 rd arm position, the 2 nd link 92 extends so that the end on the side of the connecting shaft 412 (see fig. 21) is located at a position that is located at the rear side and at the lower side than the end on the side of the connecting shaft 926.

In response to the biasing force of the spring 4G, the roller unit 4D is biased in the counterclockwise direction and swings in a state seen from the right side (a state shown in fig. 22). The protruding portion 461 of the swing plate 43A contacts the screw 460 from below, thereby restricting the swing of the roller unit 4D. The position of the roller unit 4D in this state is referred to as a 3 rd unit position. In a state where the roller unit 4D is disposed at the 3 rd unit position, the rotation shaft 42 of the auxiliary conveying roller 4B is located below the rotation shaft 41 of the upper conveying roller 4A in the up-down direction.

As shown in fig. 24 and 25, when the output shaft 103 of the cylinder 4F moves forward from the state shown in fig. 22 and 23, the support arm 40 is disposed at the 2 nd arm position. In a state where the support arm 40 is disposed at the 2 nd arm position, the upper conveying roller 4A is located at a position rearward of the nozzle 6A, and the auxiliary conveying roller 4B is located at a position forward of the nozzle 6A.

The upper conveying roller 4A is spaced above the lower conveying roller 3A, and a gap is formed between the upper conveying roller 4A and the lower conveying roller 3A. On the other hand, the auxiliary conveying roller 4B approaches the upper surface 662 of the extension portion 66C of the upper support portion 6B. Therefore, in the case where the upper sheet 9A is present between the auxiliary conveying roller 4B and the upper supporting portion 6B, the upper sheet 9A is nipped by the auxiliary conveying roller 4B and the upper supporting portion 6B from the up-down direction. By rotating the auxiliary conveying roller 4B in this state, the upper sheet 9A can be conveyed rearward.

The position of the upper conveying roller 4A in the state where the support arm 40 is disposed at the 2 nd arm position is referred to as a 2 nd upper conveying position. The upper conveying position 2 is located below the upper conveying position 3. The position of the auxiliary conveying roller 4B in the state where the support arm 40 is disposed at the 2 nd arm position is referred to as a 1 st auxiliary position. The 1 st auxiliary position is located below the 2 nd auxiliary position.

In a state where the support arm 40 is disposed at the 2 nd arm position, the 2 nd link 92 extends upward from the end on the coupling shaft 412 (see fig. 21) side toward the end on the coupling shaft 926 side. The end of the 1 st link 91 on the side of the connecting shaft 951 is located on the front side and the lower side than the end of the 1 st link 91 on the side of the connecting shaft 914.

The roller unit 4D is maintained in a state where the protruding portion 461 of the swing plate 43A contacts the screw 460 from below. Therefore, the rotation shaft 42 of the auxiliary conveying roller 4B is located below the rotation shaft 41 of the upper conveying roller 4A in the up-down direction. The position of the roller unit 4D in this state is referred to as a 2 nd unit position.

As shown in fig. 26 and 27, when the output shaft 103 of the cylinder 4F moves further forward from the state shown in fig. 24 and 25, the support arm 40 is disposed at the 1 st arm position. In a state where the support arm 40 is disposed at the 1 st arm position, the upper conveying roller 4A is located at a position rearward of the nozzle 6A, and the auxiliary conveying roller 4B is located at a position forward of the nozzle 6A.

The upper conveying roller 4A approaches the lower conveying roller 3A from above. Therefore, in the case where the upper sheet 9A and the lower sheet 9B are present between the upper conveying roller 4A and the lower conveying roller 3A, the upper sheet 9A and the lower sheet 9B are nipped by the upper conveying roller 4A and the lower conveying roller 3A from the up-down direction. By rotating the upper conveying roller 4A and the lower conveying roller 3A in this state, the upper sheet 9A and the lower sheet 9B can be conveyed rearward.

The auxiliary conveying roller 4B is located close to the upper surface 662 of the extended portion 66C of the upper support portion 6B from above. Therefore, in the case where the upper sheet 9A is present between the auxiliary conveying roller 4B and the upper supporting portion 6B, the upper sheet 9A is nipped by the auxiliary conveying roller 4B and the upper supporting portion 6B from the up-down direction. By rotating the auxiliary conveying roller 4B in this state, the upper sheet 9A can be conveyed rearward.

The position of the upper conveying roller 4A in the state where the support arm 40 is disposed at the 1 st arm position is referred to as a 1 st upper conveying position. The 1 st upper conveying position is located below the 2 nd upper conveying position. The position of the auxiliary conveying roller 4B in the state where the support arm 40 is disposed at the 1 st arm position is the 1 st auxiliary position, as in the case where the support arm 40 is disposed at the 2 nd arm position.

In the state where the support arm 40 is disposed at the 1 st arm position, the 2 nd link 92 extends upward from the end on the coupling shaft 412 (see fig. 21) side toward the end on the coupling shaft 926 side. The end of the 1 st link 91 on the connecting shaft 951 side is located on the front side and the lower side than the end on the connecting shaft 914 side. The state of the 1 st link 91 and the 2 nd link 92 in the state where the support arm portion 40 is arranged at the 1 st arm position is substantially the same as the state of the 1 st link 91 and the 2 nd link 92 in the state where the support arm portion 40 is arranged at the 2 nd arm position.

The roller unit 4D rotates in the clockwise direction in a state seen from the right side (a state shown in fig. 26) against the urging force of the spring 4G. The protruding portion 461 of the swing plate 43A is separated downward with respect to the screw 460. The position of the roller unit 4D in this state is referred to as a 1 st unit position. In a state where the roller unit 4D is disposed at the 1 st unit position, the positions of the rotation shaft 42 of the auxiliary conveying roller 4B and the rotation shaft 41 of the upper conveying roller 4A in the up-down direction are substantially the same.

< upward movement mechanism 10C >)

As shown in fig. 2 and 4, the upper moving mechanism 10C includes an upper pinch roller 5A, an upper driving unit 5B, an upper arm 50, and an air cylinder 501 (see fig. 2). The upper arm 50 extends leftward from the lower end of the arm portion 1C, and further extends after the left end is bent obliquely leftward and downward. The upper arm 50 rotatably supports the upper pinch roller 5A at a lower end portion thereof with respect to the upper pinch roller 5A. As shown in fig. 12, the upper pinch roller 5A rotates about a rotation axis extending in the front-rear direction. As shown in fig. 2, the cylinder 501 can swing the lower end of the upper arm 50 in the up-down direction by advancing and retreating the output shaft connected to the piston.

Fig. 2 and 4 show a state in which the upper arm 50 swings downward and the upper pinch roller 5A moves downward. In this state, the upper pinch roller 5A approaches the cylindrical portion 32 from above. Further, the upper pinch roller 5A is located on the upstream side in the conveying direction of the nozzle 6A at the close position, and above the extended portion 66C of the upper support portion 6B. The upper pinch roller 5A is opposed to the extension setting portion 66C in the up-down direction. The position of the upper pinch roller 5A in this state is referred to as an upper pinch position. As shown in fig. 12, when the upper pinch roller 5A is at the upper pinch position, an upper detection position P of the upper detection portion 6E to the upper sheet 9A is located between the ejection port 68 of the nozzle 6A and the upper pinch roller 5A in the front-rear direction.

On the other hand, when the upper pinch roller 5A moves upward in response to the upper arm 50 swinging upward, the upper pinch roller 5A is separated upward from the cylindrical portion 32 and the extended portion 66C of the upper support portion 6B. The position of the upper pinch roller 5A in this state is referred to as an upper position.

As shown in fig. 2 and 4, the upper driving unit 5B includes an upper motor 50A. The transmission mechanism provided inside the upper arm 50 transmits the driving force of the upper motor 50A to the upper pinch roller 5A. The upper pinch roller 5A rotates in accordance with the driving of the upper motor 50A. The upper pinch roller 5A contacts the upper sheet 9A from the upper side when in the upper pinch position. The upper pinch roller 5A sandwiches the upper sheet 9A between the upper pinch roller and the extended portion 66C of the upper support portion 6B. The upper pinch roller 5A can move the upper sheet 9A in the left-right direction by rotating.

Hereinafter, as shown in fig. 12, the rotation direction of the upper pinch roller 5A in a state seen from the front side is defined. The clockwise direction is referred to as an upper 1 st rotation direction C11, and the counterclockwise direction is referred to as an upper 2 nd rotation direction C12. The upper 1 st rotation direction C11 is a rotation direction in which the lower end of the upper pinch roller 5A goes to the left. The upper 2 nd rotation direction C12 is a rotation direction in which the lower end of the upper pinch roller 5A goes to the right.

Electric structure

Fig. 28 is a diagram illustrating an electrical structure of the bonding apparatus 1. The bonding apparatus 1 includes a control device 100. The control device 100 includes a CPU201, a ROM202, a RAM203, a storage device 204, and drive circuits 205 and 206. The CPU201 performs unified control of the operation of the bonding apparatus 1. The CPU201 is connected to the ROM202, RAM203, storage 204, switch 12, pedal 207, upper detection unit 6E, heaters 208 and 209, and driving circuits 205 and 206, respectively. The ROM202 stores programs that execute various processes. The RAM203 temporarily stores various information. The storage 204 is a nonvolatile storage that stores various setting values and the like. The switch 12 outputs information indicating various instructions to the CPU201 as a detection result. The operator operates the pedal 207 with his foot. The operator inputs a start instruction or an end instruction of the bonding process to be described later via the pedal 207. The pedal 207 outputs information indicating a start instruction or an end instruction of the bonding process to the CPU201 as a detection result. The upper detection unit 6E outputs the detection result to the CPU 201.

The CPU201 transmits control signals to the lower conveyance motor 30B, the upper conveyance motor 4C, the nozzle motor 69A, the pump motor 210, the lower gap motor 30A, the lower motor 30C, and the upper motor 50A via the drive circuit 205, respectively, and performs drive control. The CPU201 controls driving of the cylinders 4F, 30D, 501 by the driving circuit 206, respectively. The CPU201 drives the heaters 208 and 209. The heater 208 heats the liner accommodated in the accommodating portion. The heater 209 heats the flow path of the adhesive. The adhesive melts and becomes a liquid when heated by the heaters 208 and 209.

< Main Process >)

The main processing will be described with reference to fig. 29 and 30. For example, the operator inputs a start instruction of the main process to the switch 12. The CPU201 reads out a program for starting main processing from the ROM202, and starts main processing. Before the main process starts, the bonding apparatus 1 is in an initial state. When the bonding apparatus 1 is in the initial state, the nozzle 6A is in the close position. The support arm 40 is in the 2 nd arm position, and therefore, the upper conveying roller 4A is in the 2 nd upper conveying position, and the auxiliary conveying roller 4B is in the 1 st auxiliary position. The lower conveying roller 3A and the nozzle lower roller 3B are in a lower contact position. The lower pinch roller 3C is in the lower pinch position. The upper pinch roller 5A is in an upper pinch position.

The CPU201 determines whether or not a roller movement instruction is detected based on the detection result of the switch 12 (S11). The roller movement instructions are instructions for moving the upper conveying roller 4A, the auxiliary conveying roller 4B, the lower pinch roller 3C, and the upper pinch roller 5A, respectively. Before detecting the roller movement instruction (S11: no), the CPU201 stands by. When the operator inputs a roller movement instruction to the switch 12 (S11: yes), the CPU201 controls driving of the cylinder 4F (see fig. 19 and 20) to move the support arm 40 from the 2 nd arm position (see fig. 24 and 25) to the 3 rd arm position (see fig. 22 and 23) (S13). The upper conveying roller 4A moves to the 3 rd upper conveying position, and the auxiliary conveying roller 4B moves to the 2 nd auxiliary position.

The CPU201 controls the driving of the air cylinder 30D to move the lower pinch roller 3C from the lower pinch position to the lower position (S15). The CPU201 controls the driving of the air cylinder 501 to move the upper pinch roller 5A from the upper pinch position to the upper position (S17). The CPU201 controls the driving of the lower gap motor 30A to move the cylindrical portion 32, and moves the lower conveying roller 3A and the nozzle lower roller 3B from the lower contact position (see fig. 9) to the lower separation position (see fig. 10) (S19).

The CPU201 determines whether or not the nozzle displacement instruction is detected based on the detection result of the switch 12 (S21). The nozzle displacement instruction is an instruction to displace the nozzle 6A. Before detecting the nozzle displacement instruction (S21: no), the CPU201 stands by. When the operator inputs a nozzle displacement instruction to the switch 12 (S21: yes), the CPU201 controls the driving of the nozzle motor 69A to displace the nozzle 6A from the approach position to the retreat position (S23). The CPU201 again determines whether or not the nozzle displacement instruction is detected based on the detection result of the switch 12 (S25). Before detecting the nozzle displacement instruction (S25: no), the CPU201 stands by.

During standby of the CPU201 (S25: no), the operator places the sheet 90 on the cover 323 of the cylindrical portion 32. After placing the sheet 90, the operator inputs a nozzle displacement instruction to the switch 12. When the operator inputs a nozzle displacement instruction to the switch 12 (yes in S25), the CPU201 controls the driving of the nozzle motor 69A to displace the nozzle 6A from the retracted position to the approach position (S27). The extension 66C of the upper support portion 6B faces the sheet 90 from above. Further, the operator adjusts the position of the sheet 90 in the front-rear direction so that the rear end portion of the sheet 90 is disposed immediately below the ejection port 68 of the nozzle 6A. Accordingly, the sheet 90 is disposed forward from the nozzle 6A, and the sheet 90 is disposed below the extension 67C (see fig. 16) of the nozzle 6A. In this case, the adhesive is applied simultaneously with the start of the adhesive treatment, and the conveyance is started promptly, whereby the adhesive device 1 applies the adhesive from the vicinity of the rear end of the sheet 90.

The CPU201 executes the height adjustment process (S29). The height adjustment process is a process of adjusting the vertical position of the cylindrical portion 32. For example, the operator inputs an instruction to raise or lower the tubular portion 32 to the switch 12. The CPU201 controls the driving of the lower gap motor 30A (see fig. 8) in accordance with the detection result of the switch 12, and moves the cylindrical portion 32 up and down (arrow Y12 in fig. 9 or arrow Y14 in fig. 10). The operator operates the switch 12 to press the sheet 9 against the nozzle 6A with an appropriate force by the nozzle lower roller 3B disposed below the nozzle 6A. When the operator inputs an instruction to end the height adjustment process to the switch 12, the CPU201 shifts the process to S31 (fig. 30).

As shown in fig. 30, the CPU201 determines whether or not a roller movement instruction is detected based on the detection result of the switch 12 (S31). Before detecting the roller movement instruction (S31: no), the CPU201 stands by. During standby of the CPU201 (S31: no), the operator folds back the vicinity of the right end portion of the sheet 90 along the guide portion 66D (see fig. 17) of the extension portion 66C of the upper support portion 6B. The portion of the sheet 90 overlapping the upper side of the extension portion 66C of the upper support portion 6B corresponds to the upper sheet 9A, and the portion of the sheet 90 sandwiched between the extension portion 66C and the cylindrical portion 32 at the lower side of the extension portion 66C corresponds to the lower sheet 9B.

After folding back the sheet 90, the operator inputs a roller movement instruction to the switch 12. When the operator inputs a roller movement instruction to the switch 12 (S31: yes), the CPU201 controls the driving of the air cylinder 501 to move the upper pinch roller 5A from the upper position to the upper pinch position (S33). The upper pinch roller 5A contacts the upper sheet 9A on the upper side of the extension 66C of the upper support 6B, thereby pinching the upper sheet 9A between the extension 66C of the upper support 6B. The CPU201 controls driving of the cylinder 4F to move the support arm 40 from the 3 rd arm position (see fig. 22 and 23) to the 2 nd arm position (see fig. 24 and 25) (S35). As shown in fig. 24, the auxiliary conveying roller 4B moves from the 2 nd auxiliary position to the 1 st auxiliary position, and nips the upper sheet 9A between the upper conveying roller and the extension portion 66C of the upper supporting portion 6B. Further, the upper conveying roller 4A moves from the 3 rd upper conveying position to the 2 nd upper conveying position. A gap is formed between the upper conveying roller 4A and the lower conveying roller 3A disposed at the 2 nd upper conveying position. Further, the rear end portion of the sheet 90 is disposed immediately below the ejection orifice 68 of the nozzle 6A. Therefore, the sheet 90 is not disposed between the upper conveying roller 4A and the lower conveying roller 3A at a position on the rear side of the nozzle 6A.

The CPU201 controls the driving of the air cylinder 30D to move the lower pinch roller 3C from the lower position to the lower pinch position (S37). The lower pinch roller 3C contacts the lower sheet 9B on the lower side of the extension 66C of the upper support 6B, thereby pinching the lower sheet 9B between the extension 66C of the upper support 6B. The CPU201 executes the 1 st bonding process (S39).

The 1 st bonding process will be described with reference to fig. 31. The 1 st bonding process is a process of feeding the sheet 90 backward while ejecting an adhesive to the vicinity of the rear end portion of the sheet 9B. For example, when the operator operates the pedal 207 with his foot, the CPU201 starts the 1 st bonding process.

The CPU201 drives the heaters 208 and 209, controls the driving of the pump motor 210, and starts the discharge of the adhesive (S51). The adhesive becomes liquid by heat generation from the heaters 208 and 209. The pump motor 210 supplies the adhesive to the nozzle 6A via the flow path. The adhesive is ejected from the plurality of ejection openings 68 (see fig. 16) of the nozzle 6A toward the lower sheet 9B, and adheres to the lower sheet 9B.

The CPU201 controls the driving of the upper conveying motor 4C to start the driving of the upper conveying roller 4A and the auxiliary conveying roller 4B, and controls the driving of the lower conveying motor 30B to start the driving of the lower conveying roller 3A (S53). The auxiliary conveying roller 4B is disposed at the 1 st auxiliary position, and sandwiches the upper sheet 9A with the upper supporting portion 6B. Therefore, the sheet 90 is conveyed rearward by the rotation of the auxiliary conveying roller 4B. On the other hand, immediately after the start of conveying the sheet 90, the rear end portion of the sheet 90 does not reach the upper conveying roller 4A. The operator guides the sheet 90 so that a part of the lower sheet 9B enters between the nozzle 6A and the nozzle lower roller 3B and the lower sheet 9B is disposed below the nozzle 6A.

The rear end portion of the sheet 90 conveyed rearward by the drive of the auxiliary conveying roller 4B gradually approaches the upper conveying roller 4A. Here, the upper conveying roller 4A is disposed at the 2 nd upper conveying position, and a gap is formed between the upper conveying roller and the lower conveying roller 3A. Therefore, the sheet 90 does not get stuck between the upper conveying roller 4A but smoothly enters between the upper conveying roller 4A and the lower conveying roller 3A.

Before detecting the end instruction of the bonding process, the CPU201 stands by (S55: no). When the rear end portion of the sheet 90 reaches the upper conveying roller 4A, the operator inputs an end instruction of the bonding process by operating the pedal 207 with his foot. When the operator inputs an end instruction of the bonding process (S57: yes), the CPU201 stops driving of the upper conveying motor 4C, the lower conveying motor 30B, and the pump motor 210, and stops driving of the heaters 208, 209, respectively (S57). The CPU201 returns the process to the main process.

As shown in fig. 30, after the 1 st bonding process (S39) is completed, the CPU201 determines whether or not a roller movement instruction is detected based on the detection result of the switch 12 (S41). Before detecting the roller movement instruction (S41: no), the CPU201 stands by. The operator inputs a roller movement instruction to the switch 12. When the operator inputs a roller movement instruction (S41: yes), the CPU201 controls driving of the cylinder 4F to move the support arm 40 from the 2 nd arm position (see fig. 24 and 25) to the 1 st arm position (see fig. 26 and 27) (S43). The auxiliary conveying roller 4B is maintained at the 2 nd auxiliary position, and continues to nip the upper sheet 9A with the extension portion 66C of the upper support portion 6B. Further, the upper conveying roller 4A moves from the 2 nd upper conveying position to the 1 st upper conveying position and approaches the lower conveying roller 3A. The upper conveying roller 4A disposed at the 1 st upper conveying position sandwiches the rear end portion of the sheet 90 with the lower conveying roller 3A. The CPU201 executes the 2 nd bonding process (S45).

The 2 nd bonding process will be described with reference to fig. 32. The 2 nd bonding process is a process of bonding the upper sheet 9A and the lower sheet 9B by an adhesive to bond the right end portion of the sheet 90 in a folded state. For example, when the operator operates the pedal 207 with his foot, the CPU201 starts the 2 nd bonding process.

The CPU201 drives the heaters 208 and 209, controls the driving of the pump motor 210, and starts the discharge of the adhesive (S61). The adhesive becomes liquid by heat generation from the heaters 208 and 209. The pump motor 210 supplies the adhesive to the nozzle 6A via the flow path. The adhesive is ejected from the plurality of ejection openings 68 (see fig. 16) of the nozzle 6A toward the lower sheet 9B.

The CPU201 controls the driving of the upper conveying motor 4C to start the driving of the upper conveying roller 4A and the auxiliary conveying roller 4B, and controls the driving of the lower conveying motor 30B to start the driving of the lower conveying roller 3A (S63). The auxiliary conveying roller 4B is disposed at the 1 st auxiliary position, and sandwiches the upper sheet 9A with the upper supporting portion 6B. Therefore, the sheet 90 is conveyed rearward by the rotation of the auxiliary conveying roller 4B. The upper conveying roller 4A is disposed at the 1 st upper conveying position, and sandwiches the upper sheet 9A and the lower sheet 9B with the lower conveying roller 3A. Accordingly, the sheet 90 is conveyed rearward by the rotation of the upper conveying roller 4A and the lower conveying roller 3A. Further, since the upper sheet 9A and the lower sheet 9B are sandwiched by the upper conveying roller 4A and the lower conveying roller 3A from the up-down direction, they are bonded together by an adhesive.

Further, the peripheral speeds of the upper conveying roller 4A and the auxiliary conveying roller 4B, which rotate in accordance with the rotational drive of the upper conveying motor 4C, coincide. Therefore, the conveyance amount per unit time of the sheet 90 conveyed by the upper conveying roller 4A is equal to the conveyance amount per unit time of the sheet 90 conveyed by the auxiliary conveying roller 4B.

The CPU201 controls the driving of the lower motor 30C to apply a rotation torque in the lower 2 nd rotation direction C22 (refer to fig. 12) to the lower pinch roller 3C (S65). The lower 2 nd rotation direction C22 is a rotation direction in which the lower sheet 9B nipped between the lower pinch roller 3C and the upper support portion 6B can be moved to the left. The lower pinch roller 3C rotates at a constant rotational speed while idling with respect to the lower sheet 9B in accordance with the rotational torque in the lower 2 nd rotational direction C22. The lower sheet 9B receives a force from the lower nip roller 3C to move leftward. As a result, tension is applied to the lower sheet 9B. The CPU201 shifts the process to S67.

The CPU201 determines whether the upper sheet 9A is at the upper detection position P based on the detection result of the upper detection portion 6E (S67). In the case where the upper detecting portion 6E detects that the upper sheet 9A is present at the upper detecting position P, the CPU201 determines that the upper sheet 9A is at the upper detecting position P (S67: yes). The CPU201 controls the driving of the upper motor 50A to apply a rotational torque in the 2 nd rotational direction C12 (refer to fig. 12) to the upper pinch roller 5A (S69). The upper 2 nd rotation direction C12 is a rotation direction in which the upper sheet 9A nipped between the upper nip roller 5A and the upper support portion 6B can be moved rightward. The upper sheet 9A receives a force to be moved to the right in response to the application of the rotational torque in the 2 nd rotational direction C12 to the upper pinch roller 5A. As a result, the upper sheet 9A moves to the right. The CPU201 shifts the process to S73.

When the upper detecting portion 6E detects that the upper sheet 9A is not present at the upper detecting position P, the CPU201 determines that the upper sheet 9A is not at the upper detecting position P (S67: no). The CPU201 controls the upper motor 50A to drive so as to apply a rotational torque in the 1 st rotational direction C11 (see fig. 12) to the upper pinch roller 5A (S71). Further, the upper 1 st rotation direction C11 is a rotation direction in which the upper sheet 9A nipped between the upper nip roller 5A and the upper supporting portion 6B can be moved to the left. The upper sheet 9A receives a force to be moved to the left in response to the application of the rotational torque in the 1 st rotational direction C11 to the upper pinch roller 5A. As a result, the upper sheet 9A moves to the left. The CPU201 shifts the process to S73.

The CPU201 determines whether or not an end instruction of the bonding process is detected based on the detection result of the pedal 207 (S73). Before detecting the end instruction of the bonding process (S73: no), the CPU201 repeatedly executes S67 to S71. In this case, the pump motor 210, the upper conveying motor 4C, the lower conveying motor 30B, the lower motor 30C, and the upper motor 50A continue to be driven, and the heaters 208 and 209 continue to generate heat.

During the period in which the CPU201 repeatedly executes S67 to S71, the adhesive ejected from the plurality of ejection ports 68 of the nozzle 6A adheres between the upper sheet 9A and the lower sheet 9B. The sheet 90 with the adhesive attached thereto is conveyed to the rear side by the upper conveying roller 4A, the lower conveying roller 3A, and the nozzle lower roller 3B. The upper sheet 9A and the lower sheet 9B are sandwiched by the upper conveying roller 4A and the lower conveying roller 3A, and are bonded together by an adhesive.

In addition, during the period in which the CPU201 repeatedly executes S67 to S71, the upper pinch roller 5A rotates in the 1 st rotation direction C11 or the 2 nd rotation direction C12, and the upper sheet 9A moves in the left-right direction. Thereby, the position of the upper sheet 9A in the left-right direction is adjusted so that the edge portion 90A (see fig. 12) which is the left end portion of the upper sheet 9A passes through the vicinity of the upper detection position P. Further, the rotation torque in the lower 2 nd rotation direction C22 is continuously applied to the lower pinch roller 3C. Thereby, a tension to the left is always applied to the lower sheet 9B, and the slackening of the sheet 90 is suppressed.

When the operator operates the pedal 207 with his foot and inputs an instruction to end the bonding process (yes in S73), the CPU201 stops driving of each of the upper conveying motor 4C, the lower conveying motor 30B, the pump motor 210, the lower motor 30C, and the upper motor 50A, and stops driving of each of the heaters 208 and 209 (S75). The CPU201 ends the 2 nd bonding process and returns the process to the main process. As shown in fig. 30, after the 2 nd bonding process (S45) ends, the CPU201 ends the main process.

< action, effect of the present embodiment >

When the bonding device 1 detects the presence of the upper sheet 9A at the upper detection position P by the upper detection portion 6E (yes in S67), the upper pinch roller 5A is driven to rotate, and the upper sheet 9A is moved to the right (S69). When the bonding device 1 detects that the upper sheet 9A is not present at the upper detection position P by the upper detection portion 6E (S67: no), the upper pinch roller 5A is driven to rotate, and the upper sheet 9A is moved to the left (S71). Thereby, the position of the upper sheet 9A in the left-right direction is adjusted so that the edge portion 90A (see fig. 12) which is the left end portion of the upper sheet 9A passes through the vicinity of the upper detection position P. On the other hand, the bonding apparatus 1 controls the lower motor 30C so that a rotational torque in a direction to move the lower sheet 9B to the left is applied to the lower sheet 9B regardless of the position of the lower sheet 9B (S65). Thereby, a tension to the left is always applied to the lower sheet 9B, and the slackening of the sheet 90 is suppressed. Thus, the bonding apparatus 1 is capable of folding back the sheet 90 in a state where the sheet 90 extends straight, and bonding the folded back portion with an adhesive.

When the driving of the lower motor 30C is controlled to apply a rotational torque to the lower pinch roller 3C (S65), the lower pinch roller 3C rotates at a constant rotational speed while idling with respect to the lower sheet 9B. Thus, the bonding apparatus 1 can stably apply a constant tension to the sheet 90.

When the sheet 90 is adhered by an adhesive in a state where the fold is sharply bent, the adhered portion of the sheet 90 is easily peeled off by the elastic force of the sheet 90. In contrast, the right end of the guide portion 66D is curved when viewed in the front-rear direction. In this case, the bonding device 1 can bend the crease of the sheet 90, and thus the possibility of peeling off the bonded portion of the sheet 90 can be reduced.

The 1 st upper surface 673 of the nozzle 6A and the upper surface 662 of the upper support 6B are located at the same height in the up-down direction. Therefore, the bonding apparatus 1 can smoothly convey the rear end portion of the sheet 90 by suppressing the formation of a step between the upper support portion 6B and the nozzle 6A.

The lower pinch roller 3C has a reduced diameter portion 39B which becomes smaller as the diameter is removed toward the front. In this case, the bonding apparatus 1 can reduce the possibility that the sheet 90 conveyed from the front toward the rear is caught at the lower pinch roller 3C, thereby interfering with conveyance of the sheet 90.

< modification >

The upper support portion 2A, which is a modification of the upper support portion 6B shown in fig. 17, will be described with reference to fig. 33 to 38. The upper support portion 2A has a coupling portion 26A and extension portions 26B and 26C. The coupling portion 26A and the extension portions 26B and 26C correspond to the coupling portion 66A and the extension portions 66B and 66C of the upper support portion 6B (see fig. 17). The connecting portion 26A and the extending portion 26B of the upper support portion 2A have the same shape as the connecting portion 66A and the extending portion 66B of the upper support portion 6B. The upper support portion 2A is different in shape from the extension portion 66C of the upper support portion 6B in the extension portion 26C.

The extension portion 26C includes a base 21, a guide 22, and a fixing portion 23. The base 21 has a plate shape and extends leftward from the lower end of the extension portion 26B. A reflecting portion 200 that reflects light emitted from the light emitting portion of the upper detecting portion 6E toward the light receiving portion is provided on the upper surface of the base 21. The upper detection position P of the upper detection portion 6E is located on the reflection portion 200.

As shown in fig. 34, 36, and 37, a groove-shaped support portion 211 recessed upward is formed on the lower surface of the base portion 21. The support portion 211 extends continuously in the left-right direction between the right end portion and the left end portion of the base 21.

The guide 22 is supported by the base 21 so as to be movable in the left-right direction. As shown in fig. 34 to 38, the guide portion 22 includes a guide body 22A and an extension portion 22B. The guide body 22A has a plate shape and is disposed on the right side with respect to the right end portion of the base 21. The thickness of the guide body 22A is the same as that of the base 21. As shown in fig. 35, the right end 221 of the guide body 22A is curved in an arcuate shape so as to protrude rightward when viewed from the front-rear direction.

As shown in fig. 34, 36, and 37, the extension 22B extends from the left end of the guide body 22A toward the left side. The extension 22B has an elongated plate shape. The length of the extension 22B in the front-rear direction is approximately 1/3 of the length of the guide body 22A in the front-rear direction, and is equal to the width of the support portion 211 of the base 21 in the front-rear direction. The length of the extension 22B in the left-right direction is equal to the length of the base 21 in the left-right direction. The thickness of the extension 22B is smaller than the thickness of the guide body 22A. The lower surface of the extension 22B is disposed on the same plane as the lower surface of the guide body 22A. Long holes 222 long in the left-right direction are formed in the extension 22B.

The extension 22B of the guide 22 enters the support 211 of the base 21 from the right. The support 211 supports the extension 22B so that the extension 22B can slide in the left-right direction. The position of the guide portion 22 in the left-right direction with respect to the base portion 21 can be changed.

The fixing portion 23 is a screw having a disk-shaped head. The rod portion of the fixing portion 23 is screwed into a screw hole provided near the right end portion in the bottom surface of the support portion 211 of the base portion 21. The guide portion 22 is movable in the left-right direction with respect to the base portion 21 in a state where the fixing portion 23 is unscrewed. On the other hand, in a state where the fixing portion 23 is tightened, the movement of the guide portion 22 in the right-left direction with respect to the base portion 21 is restricted, and the guide portion 22 is fixed to the base portion 21.

Fig. 33 to 35 show a state in which the guide portion 22 is moved to the leftmost side with respect to the base portion 21. In this state, the right end portion of the base 21 and the left end portion of the guide portion 22 are in contact. The length of the extension portion 26C in the left-right direction becomes shortest. Fig. 36 to 38 show a state in which the guide portion 22 is moved to the far right side with respect to the base portion 21. In this state, the right end portion of the base 21 and the left end portion of the guide portion 22 are separated in the left-right direction. The length of the extension portion 26C in the left-right direction becomes longest.

Fig. 35 shows a case where the sheet 90 is folded back using the extension portion 26C in a state where the left-right direction is shortest. Fig. 38 shows a case where the sheet 90 is folded back using the extension portion 26C in which the left-right direction is longest. In each case, the position of the edge end portion 90A, which is the left end portion of the upper sheet 9A, coincides with the upper detection position P in the left-right direction. The length in the left-right direction of the upper sheet 9A in the case of fig. 38 is longer than the length in the left-right direction of the upper sheet 9A in the case of fig. 35.

In the bonding apparatus 1, in the state where the sheets 90 are arranged as described above, the adhesive is discharged from the nozzles 6A, and the upper sheet 9A and the lower sheet 9B are sandwiched between the upper conveying roller 4A and the lower conveying roller 3A in the up-down direction to bond them. By changing the position of the guide portion 22 in the left-right direction with respect to the base portion 21 at the extension portion 26C, the operator can bond the upper sheet 9A and the lower sheet 9B while adjusting the width of the folded portion of the sheet 90.

By sliding the extension 22B of the guide 22 with respect to the support 211 of the base 21, the operator can easily adjust the position of the guide body 22A with respect to the base 21 in the lateral direction. In addition, the operator can stably maintain the position of the guide portion 22 in the left-right direction after adjustment by the fixing portion 23.

< other modifications >

The present invention is not limited to the above-described embodiments and modifications, and various modifications are possible. The amount of the rotational torque applied to the lower pinch roller 3C by controlling the driving of the lower motor 30C by the process of S65 may be changed according to the material, thickness, surface characteristics, and the like of the sheet 90. The amount of the rotational torque applied to the upper pinch roller 5A by controlling the driving of the upper motor 50A through the processing of S69 and S71 may be changed according to the material, thickness, surface characteristics, and the like of the sheet 90.

The mechanism of the upper support portion 2A that can adjust the position of the guide body 22A in the lateral direction with respect to the base 21 is not limited to the above embodiment. For example, a member corresponding to the extension portion may be provided on the base portion 21, and a member corresponding to the support portion may be provided on the guide body 22A. The extension portion 26C may have a bellows structure that can extend and retract in the left-right direction. The extending portion 22B may be provided with graduations for identifying the length of the extending portion 26C in the lateral direction.

The rotation speed of the lower pinch roller 3C may not be constant in the case where the driving of the lower motor 30C is controlled to apply the rotation torque to the lower pinch roller 3C (S65). The rotation speed of the lower pinch roller 3C may be changed in accordance with the driving state of the upper pinch roller 5A.

The right surface of the guide portion 66D of the upper support portion 6B and the right end 221 of the guide portion 22 of the upper support portion 2A may extend linearly in the up-down direction in a state of being seen in the front-rear direction. The attachment that can switch the shape of the right side surface may be attached to or detached from the guide portion 66D of the upper support portion 6B and the guide portion 22 of the upper support portion 2A.

The 1 st upper surface 673 of the nozzle 6A and the upper surface 662 of the upper support 6B may be different in height in the up-down direction. For example, the 1 st upper surface 673 of the nozzle 6A may be disposed at a position lower than the upper surface 662 of the upper support portion 6B.

The upper nip roller 5A may have a constant diameter portion and a reduced diameter portion. The constant diameter portion is a portion having a constant diameter around the rotation axis. The diameter-reduced portion is a portion adjacent to the constant diameter portion in front of the constant diameter portion, and is a portion whose diameter around the rotation axis decreases as going forward. The diameter-reduced portion may be provided only in one of the lower pinch roller 3C and the upper pinch roller 5A, or may be provided in both of the lower pinch roller 3C and the upper pinch roller 5A.

When the lower pinch roller 3C is at either one of the lower position and the lower pinching position, it may protrude upward from the notch 32C of the cylindrical portion 32. The amount of protrusion of the lower pinch roller 3C from the notch 32C of the cylindrical portion 32 in the case where the lower pinch roller 3C is in the lower pinching position may be larger than the amount of protrusion of the lower pinch roller 3C from the notch 32C of the cylindrical portion 32 in the case where the lower pinch roller 3C is in the lower position. The gap with the lower surface of the upper bearing portion 6B may vary with the lower pinch roller 3C in the down position and in the down pinch position. That is, the switching portion 3G that moves the lower pinch roller 3C up and down can function as a mechanism that can adjust the magnitude of the pinching force that pinches the lower sheet 9B between the lower pinch roller 3C and the upper support portion 6B by the lower pinch roller 3C.

The operator may switch between the lower nip roller 3C and the lower nip position depending on the thickness and type of the sheet 90. The adhesive device 1 can adjust the magnitude of the force for sandwiching the sheet 90 between the lower nip roller 3C and the upper support portion 6B according to the thickness and type of the sheet 90, and thus can stably apply a constant tension to the sheet 90.

In the above configuration, the switching unit 3G for vertically moving the lower pinch roller 3C may be driven by a motor instead of the air cylinder 30D. In this case, the motor can adjust the position in the up-down direction of the lower pinch roller 3C at the lower pinch position. The operator can adjust the position of the lower pinch roller 3C in the vertical direction at the lower pinch position according to the thickness and type of the sheet 90.

< others >

In the present specification, "end portion" is not limited to the end edge of the member, but is intended to include the end edge and the vicinity thereof. The front-rear direction is an example of the "conveyance direction" of the present invention. The front side is an example of the "upstream side" of the present invention. The rear side is an example of the "downstream side" of the present invention. The upper conveying mechanism 10B and the lower conveying mechanism 10A are one example of the "conveying mechanism" of the present invention. The cylindrical portion 32 is an example of the "lower support" of the present invention. The left-right direction is an example of the "specific direction" of the present invention. The right side is an example of "one side of a specific direction" of the present invention. The left side is an example of the "opposite side of the specific hand direction" of the present invention. The upper sheet 9A is an example of the "edge portion" of the present invention. The process of S69 is an example of the "1 st control process" of the present invention. The process of S71 is an example of the "2 nd control process" of the present invention. The process of S65 is an example of the "3 rd control process" of the present invention. The switching unit 3G is an example of the "lower adjustment mechanism" of the present invention.

Claims (8)

1. An adhesive device is characterized in that,

the bonding device comprises:

a conveying mechanism that conveys the sheet in a conveying direction;

a lower support body that supports the sheet conveyed by the conveying mechanism from a lower side;

a nozzle having an ejection port for ejecting an adhesive toward the sheet supported by the lower support;

an upper support portion having a guide portion extending in the conveying direction at an end on one side in a specific direction intersecting both the conveying direction and the up-down direction, the upper support portion supporting, from below, an edge portion of the sheet folded back along the guide portion;

a lower pinch roller protruding upward from the lower support body on an upstream side of the nozzle in the conveying direction and rotatable about an axis parallel to the conveying direction, the lower pinch roller pinching a portion of the sheet other than the edge portion from below between the lower surface of the upper support portion;

an upper pinch roller rotatable about an axis parallel to the conveying direction and pinching the edge portion from above between the upper pinch roller and the upper support portion;

a lower motor that drives the lower grip roller;

An upper motor that drives the upper pinch roller;

an upper detection portion that detects whether the edge portion is present at an upper detection position that is a predetermined position between the ejection orifice and the upper pinch roller in the conveying direction; and

a control unit that controls the conveying mechanism, the lower motor, and the upper motor,

the control unit performs the following processing:

a 1 st control process, wherein when the upper detection unit detects that the edge portion exists at the upper detection position, the control unit performs the 1 st control process, controls the upper motor to drive and rotate the upper pinch roller, and moves the edge portion to the one side;

a 2 nd control process, wherein when the upper detection unit detects that the edge portion is not present at the upper detection position, the control unit performs the 2 nd control process, and controls the upper motor to drive the upper pinch roller to rotate and move the edge portion to the other side in the specific direction; and

and a 3 rd control process of controlling the lower motor to apply a rotational torque to the lower nip roller in a direction to move a portion of the sheet other than the edge portion toward the other side.

2. The bonding apparatus according to claim 1, wherein,

the upper support portion is capable of changing a position of the guide portion in the specific direction.

3. An adhesive device according to claim 2, wherein,

the upper support portion has:

the guide part; and

a base portion that movably supports the guide portion,

the guide part has:

a guide body; and

an extension portion extending from the guide body toward the other side of the specific direction,

the base has:

a support portion, which is a portion into which the extension portion enters, and which supports the extension portion so that the extension portion can slide in the specific direction; and

and a fixing part for fixing the position of the extension part.

4. The bonding apparatus according to claim 1, wherein,

in the 3 rd control process, the lower motor is controlled so that the rotation speed of the lower motor is constant.

5. The bonding apparatus according to claim 1, wherein,

the one end portion of the guide portion in the specific direction is curved in a state seen from a direction parallel to the conveying direction.

6. The bonding apparatus according to claim 1, wherein,

the upper end portion of the nozzle and the upper surface of the upper support portion are located at the same height.

7. The bonding apparatus according to claim 1, wherein,

at least one of the lower nip roller and the upper nip roller has a reduced diameter portion that decreases in diameter as going toward the upstream side in the conveying direction.

8. The bonding apparatus according to claim 4, wherein,

the bonding device further includes a lower adjusting mechanism capable of adjusting the magnitude of a clamping force of the lower clamping roller to clamp a portion of the sheet other than the edge portion between the lower clamping roller and the lower surface of the upper supporting portion from below.