CN212475534U - Bonding device - Google Patents

Abstract

The utility model relates to a bonding device, this bonding device can restrain more simply, more reliably in the part that the sheet produced the non-coating adhesive. The bonding apparatus includes a nozzle, a conveying mechanism, and a holding mechanism. The adhesive is discharged from the nozzle. The conveying mechanism conveys the upper sheet and the lower sheet by pressing them together with the adhesive discharged from the nozzle in between. The holding mechanism is switchable between a holding state in which the holding mechanism holds the lower sheet at a position on the front side of the nozzle and a release state in which the holding mechanism releases the lower sheet. When the bonding device stops bonding the upper sheet and the lower sheet, the holding mechanism is switched from the released state to the held state. The holding mechanism in the holding state holds the lower sheet.

Description

Bonding device

Technical Field

The utility model relates to a bonding device.

Background

The bonding apparatus disclosed in japanese laid-open patent publication No. 67913 in 2013 performs such a bonding operation: the upper cloth and the lower cloth are overlapped with the adhesive discharged from the nozzle in between, and are sandwiched by a first roller and a belt, and are pressed while being conveyed. When a bonding operation is performed for a cloth having high elasticity, resistance due to contact between a nozzle and a belt and resistance due to viscosity of an adhesive are generated in the lower cloth. At this time, the lower cloth is stretched between a position below the nozzle and a position sandwiched between the first roller and the belt, and tension is applied. With the bonding apparatus, when the user instructs the stop, the first roller and the belt rotate in the reverse direction to the direction in which the bonding operation is performed, and the cloth is conveyed to the upstream side in the conveying direction. The transport distance and the transport speed at this time can be set in accordance with the thickness and material of the fabric. The bonding device releases the tension applied to the lower cloth at a portion in the vicinity immediately below the nozzle by moving the cloth upstream in the transport direction. Therefore, the bonding apparatus can prevent the stretched lower cloth from contracting after the bonding operation is completed and the lower cloth at the position below the nozzle from moving. Therefore, the bonding apparatus can suppress the occurrence of a portion of the fabric where the adhesive is not applied.

With the above bonding apparatus, it is necessary for the user to set the conveying distance and the conveying speed at which the cloth is conveyed upstream in the conveying direction, depending on the thickness and material of the cloth, which is troublesome. Even if the setting is made, a slip occurs between the lower cloth and the belt, and the cloth cannot be conveyed by the set conveying distance, and a portion where the adhesive is not applied may be generated in the cloth.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a bonding device, this bonding device can restrain more simply, more reliably in the part that the sheet material produced the non-coating adhesive.

The bonding apparatus according to claim 1 comprises: a nozzle from which the adhesive is discharged; and a conveying mechanism that conveys the upper sheet and the lower sheet in the conveying direction while pressing the upper sheet and the lower sheet together with the adhesive discharged from the nozzle therebetween, wherein the bonding apparatus includes a holding mechanism that is switchable between a holding state in which the holding mechanism holds the discharged sheet at a position upstream of the nozzle in the conveying direction, and a release state in which the holding mechanism releases the discharged sheet, the holding mechanism is in the release state when the conveying mechanism conveys the upper sheet and the lower sheet, and when the bonding of the upper sheet and the lower sheet is stopped, causing the retention mechanism to switch from the released state to the retained state.

When the adhesion of the upper sheet and the lower sheet is stopped, the adhesion device can hold the discharged sheet only by switching the holding mechanism from the released state to the held state. Therefore, the bonding apparatus can suppress the movement of the portion of the discharged sheet at the position where the adhesive discharged from the nozzle adheres due to the action of tension, and can more easily and reliably suppress the occurrence of the portion of the discharged sheet where the adhesive is not applied.

In the bonding apparatus according to claim 2, the holding mechanism may include: a holding member provided upstream of the nozzle in the conveying direction, the holding member being movable to switch between the holding state when holding the discharged sheet and the release state when releasing the discharged sheet; and a driving unit that moves the holding member. The holding mechanism can hold the discharged sheet only by moving the holding member under the drive of the drive portion. Therefore, the bonding apparatus can simplify the holding mechanism.

In the bonding apparatus according to claim 3, the discharged sheet may be the lower sheet, the bonding apparatus may further include an arrangement member that is provided upstream of the nozzle in the conveying direction and is arranged between the upper sheet and the lower sheet, and the holding member may hold the lower sheet by sandwiching the lower sheet between the holding member and the arrangement member when the holding member is in the holding state. The holding member sandwiches the lower sheet between the holding member and the placement member, whereby the bonding apparatus can suppress the lower sheet from moving after the bonding operation is stopped. Therefore, the holding mechanism can easily hold the lower sheet with the holding member. The bonding apparatus can suppress generation of a portion of the lower sheet where the adhesive is not applied.

In the bonding apparatus according to claim 4, after the holding mechanism is switched from the unclamped state to the held state, when a predetermined holding time that is a predetermined time has elapsed, the discharge of the adhesive from the nozzle and the drive of the conveyance mechanism may be stopped. After the holding mechanism is switched to the holding state, the bonding apparatus conveys the discharged sheet until a prescribed holding time elapses. The lower sheet between the holding member and the conveying mechanism is stretched. Therefore, the bonding apparatus can more reliably suppress the movement of the lower sheet after the bonding operation is stopped.

In the bonding apparatus according to claim 5, the holding mechanism may be switched from the holding state to the release state when the conveyance of the upper sheet and the lower sheet is started. At the start of conveyance of the lower sheet and the upper sheet, the holding mechanism becomes a released state. Therefore, the bonding apparatus can start conveyance from a state where the lower sheet is held. Since the bonding apparatus can start conveying the lower sheet in a state where the movement of the lower sheet is restricted, it is possible to reliably suppress the occurrence of a portion of the lower sheet where the adhesive is not applied.

In the bonding apparatus according to claim 6, the holding mechanism may be switched from the holding state to the release state when a release timing that is a predetermined time period has come from the start of conveyance of the upper sheet and the lower sheet. When the conveyance of the lower sheet and the upper sheet is started, the holding mechanism is in the unclamped state after the arrival of the timing of the unclamping. Therefore, the bonding apparatus can start conveyance from a state where the lower sheet is reliably held. The bonding apparatus can suppress the generation of a portion of the lower sheet where the adhesive is not applied, regardless of the material of the sheet.

In the bonding apparatus according to claim 7, the nozzle may have a discharge port through which the adhesive is discharged, and the holding member may hold the lower sheet at a position aligned in the conveyance direction with the discharge port. The holding position of the holding member for the lower sheet is aligned with the discharge port in the conveying direction, and therefore, the bonding apparatus can suppress the lower sheet held by the holding member from being inclined with respect to the conveying direction.

In the bonding apparatus according to claim 8, the bonding apparatus may further include: a rotating shaft extending in the conveying direction; a roller provided on the rotating shaft at a position downstream of the holding member in the conveying direction; a swing portion provided on an upstream side in the conveying direction from the holding member, the swing portion supporting the rotary shaft, the swing portion being swingable about an axis extending in the conveying direction at a position offset from the rotary shaft; a swing driving unit configured to swing the swing unit; a motor that rotates the rotating shaft; and a detection unit capable of detecting the presence or absence of one end of the lower sheet in a predetermined direction orthogonal to the vertical direction and the conveyance direction, the roller can be driven by the swing driving part to swing between a clamping position and a lower position, the nip position is a position at which the roller nips the lower sheet between the lower sheet and the arranging member, the lower position is lower than the nip position, and the roller is moved from the lower position to the nip position when the conveying mechanism conveys the lower sheet and the upper sheet, and drives the motor according to a detection result of the detection unit to reciprocally rotate the roller, and when the holding member is in the holding state, the lower sheet is held by being sandwiched between the lower sheet and the arrangement member at a position above the rotation axis. The holding member sandwiches the lower sheet between the holding member and the arrangement member above the rotating shaft. Therefore, the bonding apparatus can avoid the holding member from contacting the rotating shaft, and can suppress the lower sheet from inclining with respect to the conveying direction.

Drawings

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

Fig. 2 is a left side view of the bonding apparatus 1.

Fig. 3 is a perspective view of the lower conveyance mechanism 50.

Fig. 4 is an enlarged left side view (partially sectional view) of the nozzle 11, the lower conveyor roller 64, and the upper conveyor roller 12.

Fig. 5 is a perspective view of the lower conveyance drive section 60, the lower gripping mechanism 80, and the gap adjustment section 77.

Fig. 6 is an enlarged perspective view of the lower transport roller 64 and the nozzle lower roller 65.

Fig. 7 is a front view of the bonding apparatus 1.

Fig. 8 is a perspective view of the lower clamp mechanism 80 and the moving mechanism 81.

Fig. 9 is a perspective view of the holding mechanism 800.

Fig. 10 is a right side view of the pedal 7.

Fig. 11 is an electrical block diagram of the bonding apparatus 1.

Fig. 12 is a flowchart of the setting process.

Fig. 13 is a flowchart of the heater temperature control process.

Fig. 14 is a flowchart following fig. 13.

Fig. 15 is a graph showing changes in temperature of the heater 131 and the adhesive Z.

Fig. 16 is a flowchart of the main process.

Fig. 17 is a flowchart of the bonding process.

Fig. 18 is a flow chart following fig. 17.

Fig. 19 is a left side view (partially sectional view) of the holding mechanism 800 when switched to the holding state.

Fig. 20 is a left side view of the holding mechanism 800 when the lower sheet 8 is stretched in the front-rear direction after being switched to the holding state.

Fig. 21 is a left side view of the holding mechanism 800 when switched to the unclamped state when the bonding action is restarted.

Fig. 22 is a flowchart of the lower edge control process.

Fig. 23 is a flowchart of the upper edge control processing.

Detailed Description

A bonding apparatus 1 according to an embodiment of the present invention will be described. The following description uses the left and right, front and back, and up and down indicated by arrows in the drawings. The bonding apparatus 1 bonds the upper sheet 6 (see fig. 3) and the lower sheet 8 (see fig. 3) together with an adhesive Z (see fig. 19). The lower sheet 8 and the upper sheet 6 are to be bonded in a sheet form, and are made of, for example, a flexible cloth. The upper sheet 6 overlaps the lower sheet 8 from the upper side. The bonding apparatus 1 bonds the lower specific end 8A, which is the right end of the lower sheet 8, and the upper specific end 6A, which is the left end of the upper sheet 6, together with the adhesive Z. The bonding apparatus 1 conveys the upper sheet 6 and the lower sheet 8 rearward.

As shown in fig. 1 and 2, the bonding apparatus 1 includes a base 2, a column 3, an arm 4, a head 5, and a conveyance mechanism 20. The base 2 is rectangular and fixed to the table. A support plate 51 is fixed to the left surface of the base 2. The pillar 3 is columnar and extends upward from the upper surface of the base 2. The arm portion 4 extends leftward from the upper end of the column portion 3. The front portion of the arm portion 4 has an operation portion 19. The nose portion 5 protrudes leftward from the left end portion of the arm portion 4. The conveyance mechanism 20 has a lower conveyance mechanism 50 and an upper conveyance mechanism 70. The lower conveyance mechanism 50 is provided on the support plate 51. The upper conveying mechanism 70 is provided in the nose portion 5.

As shown in fig. 3, the lower transport mechanism 50 extends in the front-rear direction and has a rear portion in an elongated cylindrical shape, and the lower transport mechanism 50 has a so-called cylindrical shape. For example, when producing a T-shirt, the operator sets one end side of the sheet 200 as the upper sheet 6 and the other end side of the sheet 200 as the lower sheet 8, and arranges the sheet 200 in the lower conveying mechanism 50 so that the sheet 200 is cylindrical. Since the rear portion of the lower conveying mechanism 50 has an elongated cylindrical shape, the operator can wrap the sheet 200 around it by the rear portion of the lower conveying mechanism 50.

As shown in fig. 3 and 4, the lower conveyance mechanism 50 includes a housing 55, a lower conveyance drive unit 60, and the like. The frame 55 extends in the front-rear direction and the left-right direction, and is open upward in a box shape. The frame 55 houses the lower conveyance drive unit 60. A support plate 57 extending in the horizontal direction is provided at the upper end of the frame 55. The upper opening of the frame 55 is closed by a support plate 57. The rear end of the frame 55 is an opening 553 which opens rearward. The opening 553 is inclined rearward and downward. The rear end of the lower conveyance driver 60 protrudes rearward from the opening 553.

A fixed shaft portion 316 projecting upward is provided at the rear end right portion of the support plate 57. The rotation support portion 314 is supported by the fixed shaft portion 316. The rotation support portion 314 is a plate member having a substantially rectangular shape in plan view. The rotation support portion 314 is rotatable about the fixed shaft portion 316 between an operating position (see fig. 3) and a retracted position. The pivot support portion 314 in the operating position is located directly below the upper pinch roller 32 described below and directly above the lower pinch roller 76 described below (see fig. 4). The retracted position is a position where the rotation support portion 314 is rotated by about 90 ° in the counterclockwise direction in the plan view from the operating position. A lower reflection plate is provided on a lower surface 317 of the rotation support portion 314.

As shown in fig. 5 and 6, the lower conveyance drive unit 60 includes a support frame 61, a lower conveyance motor 63, a lower conveyance roller 64, a lower nozzle roller 65, a conveyance belt 67 (see fig. 9), and the like. The support frame 61 extends in the front-rear direction, is open upward, and has a substantially U-letter shape. A nozzle plate 59 and a tip plate 56 are fixed to the upper rear end of the support frame 61. The nozzle plate 59 extends in the front-rear direction. The top end plate 56 extends downward rearward from the rear end of the nozzle plate 59. The nozzle plate 59 has an opening 591 opened in the vertical direction. The opening 591 is located directly below the rotation support portion 314 when in the operating position. A roller opening 592 is provided at a connecting portion between the nozzle plate 59 and the tip end plate 56. The roller opening portions 592 penetrate the nozzle plate 59 and the tip end plate 56 in the thickness direction, respectively.

The lower conveying motor 63 is fixed to the front right surface of the supporting frame 61. The drive shaft of the lower conveyance motor 63 protrudes leftward from the right portion of the support frame 61. The lower feed roller 64 is fixed to the rotation shaft 641, and the rotation shaft 641 is rotatably supported by the rear end portion of the support frame 61. The lower transport roller 64 protrudes outward from the roller opening 592. The lower conveying roller 64 supports the lower sheet 8 and the upper sheet 6 overlapped with the adhesive Z sandwiched therebetween. The lower nozzle roller 65 is fixed to the rotary shaft 651, and the rotary shaft 651 is rotatably supported by the support frame 61 at a position forward of the rotary shaft 641. The nozzle lower roller 65 protrudes upward from the opening 591. The conveyor 67 is mounted on the drive shaft of the lower conveyor motor 63, the rotary shaft 641, and the rotary shaft 651 inside the support frame 61. The conveying belt 67 transmits the driving force of the lower conveying motor 63 to the lower conveying roller 64 and the nozzle lower roller 65. Therefore, when the lower conveyance motor 63 is driven, the lower conveyance roller 64 and the nozzle lower roller 65 rotate about the horizontal direction as the axial direction.

Referring to fig. 5, the gap adjusting unit 77 will be described. The gap adjusting part 77 has the gap adjusting motor 68, the cam plate 69, the swing shaft 62, and a spring. The gap adjustment motor 68 is provided above the fixing plate 512 (see fig. 1) and below the lower conveyance motor 63. The fixed plate 512 extends leftward from the lower end of the support plate 51. A drive shaft 681 of the gap adjustment motor 68 protrudes leftward, and a cam plate 69 having a substantially circular shape in a left view is fixed to the drive shaft 681. The cam plate 69 is located inside a cam hole 631 provided in a lower right portion of the support frame 61, and the center of the cam plate 69 is eccentric with respect to a drive shaft 681 of the gap adjustment motor 68.

The swing shaft 62 extends in the left-right direction and is fixed to the housing 55 (see fig. 3). The swing shaft 62 rotatably supports a substantially central portion of the support frame 61 in the front-rear direction of the support frame 61. The spring biases the support frame 61 in a direction to swing the rear end portion side of the support frame 61 downward. Therefore, the cam plate 69 is in contact with the lower end portion of the cam hole 631. When the cam plate 69 is rotated by the driving of the gap adjustment motor 68, the support frame 61 swings about the swing shaft 62 in accordance with the rotation angle of the cam plate 69. The rear end of the support frame 61 is moved up and down (arrow Q) by the gap adjustment motor 68, and a gap (referred to as a nozzle gap) between a discharge port 13 (see fig. 7) of the nozzle 11 and the nozzle plate 59, which will be described later, is changed. The lower transport roller 64 and the lower nozzle roller 65 oscillate in the vertical direction as the nozzle gap is changed. In fig. 4, the lower transport roller 64 and the lower nozzle roller 65 when the rear end of the support frame 61 is located upward are illustrated by solid lines, and the lower transport roller 64 and the lower nozzle roller 65 when the rear end of the support frame 61 is located downward are illustrated by two-dot chain lines.

Referring to fig. 5 and 8, the lower clamping mechanism 80 is illustrated. The lower clamp mechanism 80 is housed in the housing 55 (see fig. 3). The lower clamping mechanism 80 can clamp the lower sheet 8 between the lower surface 317 (see fig. 4), and can change the position of the lower sheet 8 in the left-right direction. The lower clamp mechanism 80 includes a fixing seat 71, a lower clamp motor 72, a connecting shaft 910, a support frame 73, a transmission belt 74, a shaft portion 75, a lower clamp roller 76, a moving mechanism 81, and the like. The fixing seat portion 71 is substantially rectangular parallelepiped and fixed to the front inner side of the frame 55. The fixing seat portion 71 has a through hole 711 formed in a circular shape in the front-rear direction, and the rotating portion 717 is rotatably held inside the through hole 711. The rotation center of the rotating portion 717 is an axis J extending in the front-rear direction.

The lower clamp motor 72 is fixed to the front surface of the rotating portion 717 and rotates integrally with the rotating portion 717. A pin 940 protruding upward is provided on the rear upper surface of the lower clamp motor 72, and the upper end of the spring 946 is fixed to the rear left surface of the lower clamp motor 72. The lower end of the spring 946 is fixed to the inner side of the frame 55. The drive shaft of the lower clamp motor 72 is inserted into a through hole provided in the center of the rotating portion 717 and is connected to the connecting shaft 910. The coupling shaft 910 extends in the front-rear direction behind the rotating portion 717. The support frame 73 is located behind the fixing seat 71 and is fixed to the rear surface of the rotating portion 717. Therefore, the support frame 73 rotates together with the rotating portion 717. The spring 946 always urges the lower clamp motor 72 counterclockwise in the front view. The rear end of the coupling shaft 910 is accommodated inside the support frame 73. The support frame 73 rotatably supports the tip end of the shaft 75 by the shaft 75. The belt 74 is mounted on the coupling shaft 910 and the shaft 75. The shaft portion 75 extends in the front-rear direction at a position on the upper right with respect to the axis J.

The lower pinch roller 76 is fixed to a rear end portion of the shaft portion 75, and the lower pinch roller 76 is rotatable together with the shaft portion 75 in the front-rear direction as an axial direction. The lower nip roller 76 is below the upper nip roller 32. When the lower clamp motor 72 is driven, the shaft 75 is rotated via the drive shaft of the lower clamp motor 72, the coupling shaft 910, and the transmission belt 74. Therefore, the lower pinch roller 76 rotates together with the shaft 75 around the shaft 75.

The moving mechanism 81 has a plate portion 930, a cylinder 931, and a plate member 933. The plate 930 is provided on the upper surface of the fixing seat 71 and extends in the left-right direction. Cylinder 931 is provided in the left portion of plate portion 930. An output rod 932 of the cylinder 931 extends rightward. The plate member 933 has an L-shape in front view, and is fixed to the right end of the output rod 932. The right end of the plate member 933 abuts against the pin 940 of the lower clamp motor 72.

When the output rod 932 advances rightward, the plate member 933 moves the pin 940 rightward. As the pin 940 moves, the lower clamp motor 72 swings around the axis J in the clockwise direction in the front view together with the support frame 73 against the biasing force of the spring 946. The shaft 75 moves downward, and the lower pinch roller 76 swings about the axis J to a downward spaced position. The lower separated position is a position to which the lower nip roller 76 swings after the upper end of the lower nip roller 76 is separated downward from the lower surface 317. In fig. 4, the lower pinch roller 76 is illustrated in a two-dot chain line at the lower separated position.

When the cylinder 931 is driven and the output rod 932 moves leftward and separates from the shaft 940, the lower clamp motor 72 swings together with the support frame 73 in the counterclockwise direction in the front view about the axis J by the urging force of the spring 946. The lower nip roller 76 swings to the lower nip position centering on the axis J. The lower nip position is a position to which the lower nip roller 76 swings when nipping the lower sheet 8 between it and the lower surface 317. In fig. 4, the lower nip roller 76 is illustrated in a solid line at the lower nip position.

Referring to fig. 4, the lower detection unit 78 will be described. The lower detection portion 78 is fixed to a predetermined position of the support frame 61 and is located below an opening portion 591 (see fig. 6) of the nozzle plate 59. The lower detection unit 78 is an optical detector in which a light emitting unit and a light receiving unit are integrated. The light emitting section and the light receiving section are at the same height position with each other. The light emitting portion emits light toward the opening 591 of the nozzle plate 59. The light passing through the opening 591 is reflected downward by the lower reflection plate of the rotation support portion 314 when in the operating position. The reflected light reflected by the lower reflection plate passes through the opening 591. The light receiving unit can receive the reflected light transmitted through the opening 591.

When the lower specific end portion 8A of the lower sheet 8 is positioned above the opening portion 591 of the nozzle plate 59, the lower specific end portion 8A blocks the light emitted from the light emitting portion, and the light receiving portion does not receive the light emitted from the light emitting portion. When the lower specific end portion 8A is not located above the opening 591, light emitted from the light-emitting portion is reflected by the lower reflection plate, and the light-receiving portion receives the reflected light through the opening 591. Therefore, the lower detection unit 78 can detect whether or not the lower specific end portion 8A is at the lower detection position, which is a predetermined position in the left-right direction. The lower detection position is located on the right side of the position where the lower sheet 8 is nipped between the lower pinch roller 76 and the lower surface 317 and is located on the front side of the nozzle 11 described later.

As shown in fig. 2, the upper transport mechanism 70 includes an upper transport arm 16, an upper transport roller 12, an upper transport motor 112, an air cylinder 122 (see fig. 11), and a link mechanism. The upper transport arm 16 extends forward from the rear below the head unit 5, and then extends forward and downward. The distal end portion 16A of the upper transport arm 16 supports the upper transport roller 12 in such a manner that the upper transport roller 12 is rotatable. The upper transport roller 12 is rotatable about the left-right direction as the axial direction. The upper transport motor 112 is provided on the upper transport arm 16, and the upper transport motor 112 is connected to the upper transport roller 12 via a transmission mechanism provided inside the upper transport arm 16. The transmission mechanism is, for example, a pulley or a belt. The upper feed roller 12 is rotated about the axis in the left-right direction by the power of the upper feed motor 112.

The cylinder 122 is provided in the nose portion 5 in a posture along the front-rear direction, and is connected to the upper transport arm 16 via a link mechanism. The upper transfer arm 16 is driven by the air cylinder 122 to swing in the up-down direction. The upper transport roller 12 swings between the pressing position (see fig. 4) and the upper position (see fig. 2) by swinging the upper transport arm 16 by the air cylinder 122. The pressing position is a position to which the upper conveying rollers 12 swing when sandwiching the lower sheet 8 and the upper sheet 6 between them and the lower conveying rollers 64. The position where the lower sheet 8 and the upper sheet 6 are nipped by the upper conveying rollers 12 and the lower conveying rollers 64 corresponds to a point P in fig. 4, which is a conveying position. The upper position is a position to which the upper conveying roller 12 swings after being separated upward from the pressing position.

Referring to fig. 7, the upper clamp mechanism 30 is explained. The upper clamp mechanism 30 can change the position of the upper sheet 6 in the left-right direction. The upper clamp mechanism 30 is provided below the arm portion 4. The upper clamp mechanism 30 has an upper support portion 34, an upper arm 31, a rotary shaft 33, an upper clamp roller 32, an upper clamp motor 38, a transmission mechanism, a spring 37, an air cylinder 39, and the like. The upper support portion 34 is fixed to the right side portion of the lower surface of the arm portion 4, and has a through hole formed in a circular shape in the front-rear direction. The upper rotating portion is rotatably supported at the through hole, and protrudes forward and rearward from the through hole of the upper supporting portion 34. The rotation axis of the upper rotating portion is an axis W extending in the front-rear direction. The upper arm 31 extends downward leftward from the upper rotating portion, and the upper arm 31 swings as the upper rotating portion rotates.

The upper arm 31 has a distal end portion 31A, and the distal end portion 31A rotatably supports a rotating shaft 33 extending in the front-rear direction. The upper nip roller 32 is fixed to a rotating shaft 33. The upper pinch roller 32 is rotatable about the longitudinal direction as the axial direction, and the upper pinch roller 32 is located above the lower pinch roller 76 and on the front side of the upper transport roller 12. The upper clamp motor 38 is a motor fixed to the rear portion of the upper rotating portion and capable of rotating in the forward and reverse directions, and is capable of rotating together with the upper rotating portion. The drive shaft of the upper clamp motor 38 projects forward and enters the interior of the upper rotating portion. The transmission mechanism includes a shaft member extending in the front-rear direction inside the upper rotating portion, and a pulley, a belt, and the like provided at a front end of the shaft member. The transmission mechanism transmits the driving force of the upper nip motor 38 to the upper nip roller 32, and the upper nip roller 32 rotates in the forward and reverse directions.

The upper arm 31 swings about the axis W as the upper swing portion rotates. The upper nip roller 32 swings between an upper nip position (see fig. 4) and an upper spaced position (see fig. 7). The upper nip position is a position to which the upper nip roller 32 swings when the upper nip roller 32 nips the upper sheet 6 between the lower end thereof and the upper surface 315 of the rotary support 314. The upper separation position is a position to which the upper nip roller 32 swings after separating upward from the upper nip position.

The spring 37 biases the upper arm 31 in the clockwise direction in the front view about the axis W via another member. Therefore, the spring 37 biases the upper arm 31 in a direction of rotating from the upper clamping position toward the upper release position. The tip end 31A of the upper arm 31 is moved downward by the own weight of the upper arm 31, the upper pinch roller 32, and the like. Since the spring 37 biases the upper arm 31 upward, it is possible to suppress an excessive downward force of the upper nip roller 32 when the upper nip position is set. The cylinder 39 is fixed to the upper support portion 34. The cylinder 39 rotates the upper clamp motor 38 about the axis W by the fixing member 35 fixed to the right surface of the upper clamp motor 38. Therefore, the upper grip roller 32 swings from the upper grip position to the upper spaced position by the driving of the air cylinder 39.

The bonding apparatus 1 includes an upper detection unit 85 below the arm 4. The upper detection unit 85 is an optical detector in which a light emitting unit and a light receiving unit are integrated. The upper detection portion 85 is located between the upper conveyance roller 12 and the upper pinch roller 32. The light emitting section and the light receiving section are at the same height position with each other. The light emitting portion emits light from above toward an upper reflecting plate provided on the nozzle 11. The light emitted from the light emitting part can be reflected by the upper reflection plate. The light receiving unit can receive the reflected light reflected by the upper reflecting plate.

When the upper specific end portion 6A of the upper sheet 6 is positioned above the upper reflection plate, the upper specific end portion 6A blocks the light emitted from the light emitting portion, and the light receiving portion does not receive the light emitted from the light emitting portion. When the upper specific end portion 6A is not located above the upper reflection plate, the light emitted from the light emitting portion is reflected by the upper reflection plate, and the light receiving portion receives the reflected light. Therefore, the upper detection portion 85 can detect whether or not the upper specific end portion 6A is at the upper detection position. The upper detection position is located on the left side in the left-right direction from the position where the upper sheet 6 is sandwiched between the upper nip roller 32 and the upper surface 315, and above the nozzle 11.

The nozzle swing mechanism 22 provided in the head unit 5 will be described. The nozzle swing mechanism 22 has a nozzle motor 113, a support shaft 9, a nozzle lever 18, and the like. The nozzle motor 113 is fixed inside the head unit 5. A drive shaft of the nozzle motor 113 extends forward, and a motor gear 15 is fixed to the drive shaft. The support shaft 9 extends in the left-right direction above the drive shaft of the nozzle motor 113. A worm wheel 25 that meshes with the upper portion of the motor gear 15 is fixed to the center portion of the support shaft 9. The nozzle lever 18 is fixed to the left end of the support shaft 9 and extends downward from the support shaft 9. The nozzle 11 is connected to the lower end of the nozzle bar 18, and the nozzle 11 is located on the front side of the lower transport roller 64 and the upper transport roller 12. The nozzle 11 has a vertically extending portion extending downward from the nozzle bar 18 and a horizontally extending portion extending rightward from a lower end of the vertically extending portion. The horizontally extending portion has a discharge port 13 on the lower surface. The discharge port 13 is a plurality of circular holes arranged at substantially equal intervals in the left-right direction. The upper sheet 6 is located above the horizontally extending section. Therefore, the nozzle 11 can discharge the adhesive Z from the discharge port 13 to between the lower sheet 8 and the upper sheet 6.

The driving force of the nozzle motor 113 is transmitted to the motor gear 15 and the worm wheel 25, so that the nozzle lever 18 rotates about the support shaft 9, and the nozzle 11 moves between the approach position (see fig. 2) and the retracted position. When the nozzle 11 is in the close position, the discharge port 13 is positioned directly above the lower nozzle roller 65 and faces downward. The nozzle 11 in the retracted position is positioned on the front side of the upper nip roller 32. When the nozzle 11 is in the retracted position, the discharge port 13 faces forward and downward.

The nozzle 11 has a flow path 11A inside, and the nozzle bar 18 has a flow path 21 inside. The flow paths 11A and 21 are flow paths for the adhesive Z and communicate with each other. The flow path 11A communicates with the discharge port 13. The nozzle lever 18 has a heater 132 (see fig. 11) therein, and the heater 132 heats the adhesive Z flowing through the flow path 21.

As shown in fig. 1, the nose portion 5 has a fitting portion 41. The mounting portion 41 is provided at a substantially central portion of the nose portion 5, and includes a cover 41A, a housing portion, a cover 41B, and a heater 131 (see fig. 11). The cover 41A has a substantially rectangular parallelepiped box shape and extends upward from the upper surface of the nose portion 5. The cover 41A is opened in the up-down direction. The housing portion is provided inside the cover 41A, and a liner is detachably housed inside the housing portion. The cover 41B is detachably provided on the upper side of the housing portion, and the cover 41B opens and closes the upper opening of the housing portion. The inner container contains a hot-melt adhesive Z. The adhesive Z becomes liquid at the melting temperature and becomes solid at a temperature lower than the melting temperature. The heater 131 is provided in the storage portion and heats the inner container stored in the storage portion. The adhesive Z is heated by the heater 131 and then melted to become liquid. The operator can remove the cover 41B and replace the inner container housed in the housing with another inner container.

The arm section 4 has a supply mechanism. The supply mechanism includes a pump motor 114 (see fig. 11) and a gear pump. The pump motor 114 is located inside the arm portion 4 on the front right side of the fitting portion 41. The drive shaft of the pump motor 114 extends leftward and is connected to the gear pump via gears. The gear pump is connected to the support shaft 9. The gear pump sucks the adhesive Z from the inner container by driving of the pump motor 114, and supplies the sucked adhesive Z to the flow path 11A of the nozzle 11 through the flow path 21 (see fig. 7) of the nozzle lever 18.

Referring to fig. 4 and 9, a retaining mechanism 800 is illustrated. The holding mechanism 800 has a bearing seat 802, a rotating shaft 804, a rotating member 806, a cylinder 809, and a holding member 810. The support base 802 extends upward from the inner bottom of the frame 55. The rotating shaft 804 is supported by the upper end of the support base 802. The rotation shaft 804 extends in the left-right direction. The rotating members 806 are provided rotatably at both left and right ends of the rotating shaft 804. The rotating member 806 has: a first arm 806A extending downward from a portion connected to the rotating shaft 804; and a second arm 806B extending rearward from a portion connected to the rotating shaft 804. The second arm 806B is located below the shaft 75 of the lower clamp mechanism 80. The cylinder 809 is fixed to the front of the first arm 806A and is an inner portion of the frame 55. The air cylinder 809 has a driving rod 809A extending in the front-rear direction. The rear end of the drive rod 809A is connected to the lower end of the first arm 806A.

The holding member 810 is fixed to the rear end of the second arm 806B, and is positioned on the front side of the lower pinch roller 76 below the rotation support 314. The holding member 810 is positioned on the front side of the nozzle 11, and the holding member 810 and at least a part of the discharge port 13 (see fig. 7) of the nozzle 11 are arranged in the front-rear direction. The holding member 810 has a substantially U-shape that opens downward in front view. The open portion of the holding member 810 is a through hole 810A through which the shaft portion 75 is inserted. When the lower nip roller 76 of the lower nip mechanism 80 swings between the lower nip position and the lower spaced position, the shaft 75 swings vertically inside the through hole 810A.

By moving the drive shaft 809A in the forward and backward direction by the driving of the air cylinder 809, the rotating member 806 rotates with respect to the rotating shaft 804, and the holding member 810 is switched between a holding state (see fig. 19) and a release state (see fig. 4). The holding member 810 in the holding state sandwiches the lower sheet 8 between it and the lower surface 317 to hold the lower sheet 8. The holding member 810 in the held state protrudes upward from the notch portion 57A (see fig. 3) at the rear end of the support plate 57. The holding member 810 holds the lower sheet 8 at a holding position between the holding member and the lower surface 317, which is above the shaft 75 of the lower nip mechanism 80 and is at substantially the same vertical position as the discharge port 13. The holding member 810 in the released state is located lower than in the held state, and the holding member 810 in the released state releases the lower sheet 8 between the holding member and the lower surface 317. The upper end of the holding member 810 at this time is at substantially the same vertical position as the upper surface of the support plate 57.

Referring to fig. 10, the pedal 7 is explained. The pedal 7 is rotatable about the support shaft 97 by the foot operation of the operator. The pedal 7 rotates between a stepped-in position and a stepped-back position. The upper surface of the pedal 7 at the stepped-in position is indicated by a two-dot chain line Pb. The upper surface of the pedal 7 at the step-back position is shown by the two-dot chain line Pn. The pedal 7 is shown in a neutral position between the step-on position and the step-back position by a solid line. When the operator does not operate the pedal 7, the pedal is maintained at a neutral position. One end of the pedal 7 is connected to the tip end of the rotating push rod 92 via a connecting rod 96.

A support shaft 91 is fixed to the case 88 below the table, and the support shaft 91 rotatably supports a base end portion of a rotary push rod 92. The spring 93 always urges the rotary push rod 92 counterclockwise when viewed rightward. The stopper 94 abuts against the rotary push rod 92 to restrict the rotation of the rotary push rod 92 in the counterclockwise direction when viewed rightward. When the operator steps the pedal 7 to the step-back position, the stopper 94 moves upward. When the operator steps the pedal 7 to the stepped-in position, the spring 93 is extended. The proximal end of the rotary push rod 92 is connected to a drive shaft of the potentiometer 95. The drive shaft of the potentiometer 95 rotates in synchronization with the rotation of the rotary push rod 92, and the potentiometer 95 outputs a voltage detection value according to the rotation angle of the drive shaft to a CPU101 (see fig. 11) described later.

Referring to fig. 11, an electrical structure of the bonding apparatus 1 will be described. The bonding apparatus 1 includes a control apparatus 100. The control device 100 has a CPU101, a ROM102, a RAM103, a storage device 104, a potentiometer 95, a drive circuit 105, and a drive circuit 106. The CPU101 comprehensively controls the operation of the bonding apparatus 1. The CPU101 is connected to the ROM102, RAM103, storage device 104, operation unit 19, potentiometer 95, lower detection unit 78, upper detection unit 85, drive circuit 105, drive circuit 106, heater 131, heater 132, temperature sensor 133, temperature sensor 134, timer 135, and display unit 260. The ROM102 stores programs for executing various processes. The RAM103 temporarily stores various information. The storage device 104 is a nonvolatile storage device that stores various setting values and the like. The storage device 104 stores a temperature flag and an abnormality notification flag, which will be described later.

The operation unit 19 detects input of various information and outputs the detection result to the CPU 101. The potentiometer 95 is connected to the pedal 7, and outputs a voltage detection value corresponding to the rotational position of the pedal 7 to the CPU 101. Therefore, the CPU101 can determine the position of the pedal 7. The lower detection unit 78 and the upper detection unit 85 output the detection results to the CPU 101.

The CPU101 sends control signals to the drive circuit 105 to control the respective drives of the lower conveyance motor 63, the upper conveyance motor 112, the nozzle motor 113, the pump motor 114, the gap adjustment motor 68, the lower clamp motor 72, and the upper clamp motor 38. The CPU101 controls the respective drives of the cylinder 39, the cylinder 122, the cylinder 809, and the cylinder 931 by sending control signals to the drive circuit 106. The CPU101 drives the heaters 131 and 132. The heater 131 heats the adhesive Z in the inner container. The heater 132 heats the adhesive Z flowing toward the discharge port 13 in the flow path 21 inside the nozzle lever 18. The adhesive Z becomes liquid after being heated by the heater 131 and the heater 132. The temperature sensors 133 and 134 detect the temperatures of the heaters 131 and 132. The timer 135 outputs the count result to the CPU 101. The display unit 260 displays various information in response to a control signal from the CPU 101.

The setting process is described with reference to fig. 12. The setting process is a process of setting variables related to a heater temperature control process (see fig. 13) and a main process (see fig. 16) described later. The variables are start-up temperature, specified time, specified temperature, specified hold time, and release timing. The initial values of the above variables are stored in the storage device 104.

The CPU101 determines whether or not the variable is changed (S1). When the operator inputs an instruction to the operation unit 19 not to change the variable (S1: no), the CPU101 ends the setting process. In this case, the CPU101 applies the initial values of the variables in the heater temperature control process and the main process.

When the operator inputs an instruction to change the variable to the operation unit 19 (yes in S1), the CPU101 receives the temperature setting at the time of startup (S2). The operator inputs a desired startup temperature to the operation unit 19, and the CPU101 updates the startup temperature and stores the updated startup temperature in the storage device 104. The CPU101 receives the setting of the predetermined time (S3). The operator inputs a desired predetermined time to the operation unit 19, and the CPU101 updates the predetermined time and stores the updated predetermined time in the storage device 104. The CPU101 receives the setting of the predetermined temperature (S4). The operator inputs a desired predetermined temperature to the operation unit 19, and the CPU101 updates the predetermined temperature and stores the updated predetermined temperature in the storage device 104. The CPU101 receives the setting of the predetermined holding time (S5). The operator inputs a desired predetermined holding time to the operation unit 19, and the CPU101 updates the predetermined holding time and stores the updated predetermined holding time in the storage device 104. The CPU101 receives the setting of the release timing (S6). The operator inputs a desired release timing to the operation unit 19. The release timing is the time elapsed from when the bonding apparatus 1 resumes the bonding operation. The CPU101 updates the release timing and stores the updated release timing in the storage device 104. The CPU101 ends the setting process.

Referring to fig. 13 to 15, the heater temperature control process will be described. The heater temperature control process is a process of controlling the temperature of the heater 131 and heating the adhesive Z from the start of the bonding apparatus 1. The start-up of the present embodiment includes the time when the bonding apparatus 1 is powered on and the time when the inner container mounted in the mounting portion 41 is replaced. The heater 132 becomes a predetermined temperature in parallel with the execution of the heater temperature control process. The adhesive Z flowing through the flow paths 11A and 21 (see fig. 7) becomes a liquid.

The CPU101 determines whether or not the detected temperature, which is the temperature detected by the temperature sensor 133, is equal to or higher than the determination temperature (S11). The determination temperature is a temperature lower than the predetermined temperature and higher than the melting temperature. The predetermined temperature is a temperature of the adhesive Z suitable for discharging the adhesive Z toward the lower sheet 8, and is higher than a melting temperature of the adhesive Z. The predetermined temperature is within the temperature range of the adhesive Z discharged from the discharge port 13 when the bonding apparatus 1 bonds the lower sheet 8 and the upper sheet 6. When the adhesive Z in the inner container is in a solid state, the CPU101 determines that the detected temperature is lower than the determination temperature (S11: no). The CPU101 sets the temperature flag stored in the storage device 104 to 0 (S13).

The CPU101 controls the timer 135 to start counting time (S15). The CPU101 controls the heater 131 so that the detected temperature becomes a start-up temperature higher than a predetermined temperature while acquiring the detected temperature at predetermined intervals (S17). The CPU101 determines whether or not the detected temperature is equal to or higher than the startup temperature (S19). When the CPU101 determines that the detected temperature is less than the startup-time temperature (S19: NO), the CPU101 shifts the process to S17. When the CPU101 repeats S17 and S19, the temperature of the heater 131 reaches the startup temperature, and the CPU101 determines that the detected temperature is equal to or higher than the startup temperature (S19: yes). This timing is time t1 in fig. 15. At this time, the temperature of the adhesive Z is lower than the startup temperature.

The CPU101 determines whether or not a predetermined time has elapsed from the start of counting time, based on the counting result of the timer 135 (S21). When the CPU101 determines that the predetermined time has not elapsed (S21: NO), the CPU101 shifts the process to S17. The CPU101 repeats S17 to S21, whereby the heater 131 maintains the startup temperature. In fig. 15, the elapse timing of the predetermined time is time t 2. At this time, the temperature of the adhesive Z becomes the startup temperature. When the CPU101 determines that the prescribed time has elapsed (S21: YES), the CPU101 sets the temperature flag stored in the storage device 104 to 1 (S23). When the temperature flag is 1, it indicates that the adhesive Z can be discharged from the nozzle 11. The CPU101 ends the counting of the timer 135 (S25).

As shown in fig. 14, the CPU101 sets the abnormality notification flag stored in the storage device 104 to 0 (S31). The CPU101 controls the heater 131 so that the detected temperature becomes a predetermined temperature (S33). The CPU101 determines whether or not the detected temperature is within a predetermined range (S35). The predetermined range is a range of ± α ℃ including the predetermined temperature received at S4. Immediately after the detected temperature has decreased from the start-up temperature, the detected temperature is higher than the predetermined range (S35: NO).

The CPU101 determines whether or not to replace the liner mounted in the mounting portion 41 (S39). When the operator inputs the liner replacement information indicating that the replacement of the liner is to be performed to the operation unit 19 (yes in S39), the CPU101 controls the heater 131 so that the detected temperature becomes the predetermined temperature (S45). The CPU101 determines whether or not the replacement of the liner is completed (S46). Until the operator inputs replacement completion information indicating completion of replacement of the liner to the operation unit 19 (S46: no), the CPU101 shifts the process to S45, and repeats S45 and S46. The operator replaces the inner container with a new one and mounts the inner container on the mounting portion 41. When the operator inputs the replacement completion information to the operation unit 19 (yes in S46), the CPU101 shifts the process to S13 (see fig. 13). After executing S13, S15, the CPU101 controls the heater 131 so that the detected temperature becomes the startup-time temperature (S17).

When the operator does not input the liner replacement information to the operation unit 19 (no in S39), the CPU101 determines whether the operator has stepped on the pedal 7 (S41). When the operator does not step on the pedal 7 (S41: no), the CPU101 shifts the process to S33 and repeats the above process. By repeating the processing of S33 and thereafter, the detected temperature is lowered from the start-up temperature and controlled to be within the predetermined range. In fig. 15, the timing at which the detected temperature becomes the predetermined temperature is time t 3. At this time, the temperature of the adhesive Z is higher than a predetermined temperature. When determining that the detected temperature is within the predetermined range (yes in S35), the CPU101 sets the abnormality notification flag stored in the storage device 104 to 1 (S37). The abnormality notification flag is 1, which indicates that abnormality notification is executed when the detected temperature within the predetermined range is once out of the predetermined range.

When the operator steps on the pedal 7 in the bonding process (see fig. 17) described later, the bonding apparatus 1 performs the bonding operation. At this time, the CPU101 judges that the operator has stepped on the pedal 7 (S41: YES), and judges whether or not the detected temperature is within a predetermined range (S42). When the CPU101 determines that the detected temperature is within the predetermined range (S42: YES), the CPU101 shifts the process to S33 and repeats the above-described process. At this time, if the detected temperature is out of the predetermined range due to the burst edge (no in S42), the CPU101 determines whether the abnormality notification flag is 1 (S43). When the CPU101 determines that the abnormality notification flag is 1 (S43: YES), the CPU101 executes abnormality notification (S44). The CPU101 displays information indicating that the temperature of the adhesive Z is out of the predetermined range on the display unit 260. The CPU101 shifts the process to S33, and repeats the above-described process.

Until the detected temperature falls within the predetermined range from the start-up temperature (no in S35), the operator may step on the pedal 7. The CPU101 determines that the operator has stepped on the pedal 7 (S41: yes). The detected temperature is out of the predetermined range (S42: NO). At this time, the abnormality notification flag is 0 (S43: no), the CPU101 does not execute S44, and the process proceeds to S33. Therefore, the bonding apparatus 1 can prevent the occurrence of an abnormality from being erroneously notified.

When it is determined at S11 that the detected temperature is equal to or higher than the determination temperature (S11: yes), the CPU101 determines whether or not the temperature flag stored in the storage device 104 is 1 (S27). When the CPU101 determines that the temperature flag is 0 (S27: NO), the CPU101 shifts the process to S13. If the temperature flag in the previous heater temperature control process is 1(S23), the CPU101 determines that the temperature flag is 1 in the current heater temperature control process (S27: yes), and the process proceeds to S31. That is, the CPU101 does not perform control of the heater 131 to bring the detected temperature to the startup temperature (S17). Since the adhesive Z is already liquid before the heater temperature control process of this time is started, S17 to S21 can be omitted from the bonding apparatus 1, and unnecessary heating of the adhesive Z can be prevented.

The main process is described with reference to fig. 16 to 23. When the main process is started, the bonding apparatus 1 is in an initial state. At this time, the nozzle 11 is at the close position, the upper transport roller 12 is at the pressing position, the pivot support 314 is at the operating position, the lower pinch roller 76 is at the lower pinch position, the upper pinch roller 32 is at the upper pinch position, the rear end of the support frame 61 is at the upper position, and the holding mechanism 800 is in the unclamped state. When the operator turns on the power of the bonding apparatus 1, the CPU101 starts the main process. The CPU101 executes a main process in parallel with the heater temperature control process. The CPU101 determines whether or not an operation instruction is given to the operation unit 19 (S49). Before the operator inputs an operation instruction to the operation unit 19 (S49: no), the CPU101 stands by. When the operator inputs an operation instruction to the operation unit 19 (yes in S49), the CPU101 controls the air cylinder 931 to swing the lower pinch roller 76 from the lower pinch position to the lower separation position, and controls the air cylinder 39 to swing the upper pinch roller 32 from the upper pinch position to the upper separation position (S50). The CPU101 controls the gap adjustment motor 68 to lower the rear end of the support frame 61 and expand the nozzle gap (S51). The CPU101 determines whether there is a roller swing instruction (S52). The roller swing instruction is an instruction to swing the upper conveying roller 12 in the up-down direction. Before the operator inputs a roller swing instruction to the operation unit 19 (S52: no), the CPU101 stands by. When the operator inputs a roller swing instruction to the operation unit 19 (yes in S52), the CPU101 controls the air cylinder 122 to swing the upper transport roller 12 from the pressed position to the upper position (S53).

The CPU101 controls the air cylinder 931 to swing the lower grip roller 76 from the lower spaced position to the lower grip position (S54). The CPU101 starts a lower edge control process (see fig. 22) described later (S55). The CPU101 sets the lower edge flag stored in the storage device 104 to 1. When the lower edge flag is 0, it indicates that the lower edge control processing is completed, and when the lower edge flag is 1, it indicates that the lower edge control processing is started. When the lower edge flag stored in the storage device 104 has been 1, the CPU101 still overwrites the lower edge flag with 1.

The CPU101 determines whether the arrangement of the lower sheet 8 is completed (S59). Until the operator inputs information indicating that the arrangement of the lower sheet 8 is completed to the operation portion 19 (S59: no), the CPU101 stands by. The lower sheet 8 is disposed on the support plate 57, the nozzle plate 59, and the lower conveying roller 64 by the operator. The lower pinch roller 76 sandwiches the lower sheet 8 between it and the lower surface 317. When the operator inputs information indicating that the arrangement of the lower sheet 8 is completed to the operation unit 19 (yes in S59), the CPU101 controls the gap adjustment motor 68 to move the rear end of the support frame 61 upward to reduce the nozzle gap (S61).

The CPU101 determines whether the arrangement of the upper sheet 6 is completed (S62). Until the operator inputs information indicating that the arrangement of the upper sheets 6 is completed to the operation portion 19 (S62: no), the CPU101 stands by. The operator places the upper sheet 6 on the upper surface 315, the horizontally extending portion of the nozzle 11, and the rear end portion of the lower sheet 8 from above. When the operator inputs information indicating that the arrangement of the upper sheet 6 is completed to the operation unit 19 (yes in S62), the CPU101 controls the air cylinder 39 to swing the upper pinch roller 32 from the upper separation position to the upper pinch position (S63). The upper nip roller 32 nips the upper sheet 6 between it and the upper surface 315.

The CPU101 starts the upper edge control process (see fig. 23) described later (S64). The CPU101 sets the upper edge flag stored in the storage device 104 to 1. When the upper edge flag is 0, it indicates that the upper edge control processing is completed, and when the upper edge flag is 1, it indicates that the upper edge control processing is started. When the upper edge flag has been 1, the CPU101 still overwrites the upper edge flag with 1.

The CPU101 determines whether there is a roller swing instruction (S65). Before the operator inputs a roller swing instruction to the operation unit 19 (S65: no), the CPU101 stands by. When the operator inputs a roller swing instruction to the operation unit 19 (yes in S65), the CPU101 controls the air cylinder 122 to swing the upper transport roller 12 from the upper position to the pressed position (S66). The upper conveying rollers 12 sandwich the lower sheet 8 and the upper sheet 6 therebetween and the lower conveying rollers 64. The CPU101 executes the bonding process (S69).

The bonding process will be described with reference to fig. 17 and 18. The CPU101 determines whether the operator has stepped on the pedal 7 (S73). Before the operator steps on the pedal 7 (S73: no), the CPU101 stands by. When the operator steps on the pedal 7 (S73: YES), the CPU101 judges whether or not the detected temperature is within a predetermined range (S75). When the CPU101 determines that the detected temperature is outside the predetermined range (S75: NO), the CPU101 shifts the process to S73.

When the CPU101 determines that the detected temperature is within the predetermined range (S75: YES), the CPU101 controls the lower conveyance motor 63 and the upper conveyance motor 112 to start driving the lower conveyance roller 64 and the upper conveyance roller 12 (S76). The conveyance mechanism 20 conveys the upper sheet 6 and the lower sheet 8 to the rear side by the cooperative operation of the upper conveyance roller 12 and the lower conveyance roller 64. The CPU101 controls the pump motor 114 to start discharging the adhesive Z (S77). The supply mechanism supplies the adhesive Z as a liquid to the discharge port 13 through the inner container, the flow path 11A, and the flow path 21 by driving the pump motor 114, and discharges the adhesive Z from the discharge port 13 through the nozzle 11.

The CPU101 determines whether the pedal 7 is at the neutral position (S78). The movement of the pedal 7 from the stepped-in position to the neutral position indicates the stop of the bonding operation. When the operator keeps stepping on the pedal 7 (S78: no), the CPU101 stands by. The nozzle 11 discharges the adhesive Z toward the lower sheet 8, and the conveying mechanism 20 pressure-contacts the lower sheet 8 and the upper sheet 6 coated with the adhesive Z together and conveys them to the rear side. Thus, the bonding apparatus 1 bonds the lower sheet 8 and the upper sheet 6 together.

When the operator returns the pedal 7 to the neutral position (S78: YES), the CPU101 determines that the bonding operation is stopped, and controls the air cylinder 809 to switch the holding member 810 from the released state to the held state (S79). The holding member 810 sandwiches the lower sheet 8 between it and the lower surface 317 of the rotation support portion 314 (refer to fig. 19).

The CPU101 controls the timer 135 to start counting time (S80). The CPU101 determines whether or not a predetermined holding time has elapsed (S81). Until the CPU101 determines that the prescribed holding time has elapsed (S81: no), the CPU101 stands by. At this time, the lower conveyance motor 63, the upper conveyance motor 112, and the pump motor 114 are driven. The lower sheet 8 is stretched in the front-rear direction between the holding member 810 and the conveyance position by the driving of the lower conveyance rollers 64 and the upper conveyance rollers 12 (see fig. 20). When the CPU101 determines that the prescribed holding time has elapsed (S81: YES), the CPU101 ends the counting of the timer 135 (S82). The CPU101 stops the driving of the lower conveyance motor 63, the upper conveyance motor 112, and the pump motor 114 (S83). The bonding apparatus 1 stops the bonding operation.

The CPU101 determines whether or not the operator has stepped on the pedal 7 at the neutral position (S84). When the operator steps on the pedal 7 (S84: YES), the CPU101 judges whether or not the detected temperature is within a predetermined range (S90). When the CPU101 determines that the detected temperature is out of the predetermined range (S90: NO), the CPU101 stands by. When the CPU101 determines that the detected temperature is within the predetermined range (YES in S90), the CPU101 controls the lower conveyance motor 63 and the upper conveyance motor 112 to re-drive the lower conveyance roller 64 and the upper conveyance roller 12 (S91).

The CPU101 controls the timer 135 to start counting time (S92). The CPU101 determines whether or not the release timing has come based on the count result of the timer 135 (S93). Until the CPU101 determines that the release timing comes (S93: no), the CPU101 stands by. The holding member 810 in the holding state maintains the lower sheet 8 in the conveyance position in a state stretched in the front-rear direction (see fig. 20). When the CPU101 determines that the release timing comes (YES in S93), the CPU101 controls the air cylinder 809 to switch the holding member 810 from the holding state to the release state (S94). The holding member 810 is separated downward from the lower sheet 8 (see fig. 21). The CPU101 ends the counting of the timer 135 (S95).

The CPU101 shifts the process to S77, and the bonding apparatus 1 continues the bonding operation. When the operator returns the pedal 7 to the neutral position (S78: YES), the CPU101 brings the holding member 810 into the holding state (S79), and executes S80 to S84. When the operator does not step on the pedal 7 (no in S84), the CPU101 determines whether the operator has stepped back on the pedal 7 (S85). When the operator does not step back the pedal 7 (S85: no), the CPU101 shifts the process to S84. When the operator steps back on the pedal 7 (S85: YES), the CPU101 controls the air cylinder 809 to release the holding member 810 (S86), and returns to the main process.

As shown in fig. 16, the CPU101 ends the lower edge control process (see fig. 22) and the upper edge control process (see fig. 23) described later (S70). The CPU101 sets the lower edge flag and the upper edge flag stored in the storage device 104 to 0. The CPU101 determines whether or not there is an operation to turn off the power of the bonding apparatus 1 (S72). When the CPU101 determines that there is no operation to turn off the power (S72: no), the CPU101 shifts the process to S49. Before the operation section 19 inputs an operation instruction (S49: no), the operator removes the lower sheet 8 and the upper sheet 6 which have been bonded together. The sheet 200 made by bonding the lower specific end portion 8A and the upper specific end portion 6A together is completed. By the CPU101 executing S50 to S69, the bonding apparatus 1 can bond the new lower sheet 8 and the upper sheet 6. When the CPU101 determines that there is an operation to turn off the power supply (S72: yes), the CPU101 ends the main process.

Referring to fig. 22, the lower edge control process is explained. The CPU101 executes the lower edge control processing in parallel with the main processing. The CPU101 determines whether or not to start the lower edge control process (S101). When the lower edge flag stored in the storage device 104 is 0 (S101: no), the CPU101 stands by. When the lower edge flag is set to 1 in S55 of the main process (S101: yes), the CPU101 determines whether or not the lower specific end portion 8A is at the lower detection position based on the detection result of the lower detection portion 78 (S103). When the CPU101 determines that the lower specific end portion 8A is at the lower detection position (S103: yes), the CPU101 controls the lower grip motor 72 to rotate the lower grip roller 76 in the first output direction (S105). The first feeding direction is a rotational direction of the lower pinch roller 76 when the upper end of the lower pinch roller 76 goes to the left. The CPU101 shifts the process to S109.

When the CPU101 determines that the lower specific end portion 8A is not at the lower detection position (S103: no), the CPU101 controls the lower grip motor 72 to rotate the lower grip roller 76 in the second output direction (S107). The second output direction is the reverse of the first output direction. The CPU101 shifts the process to S109.

The CPU101 determines whether or not to end the lower edge control process (S109). Before the lower edge flag becomes 0 in S70 of the main process (S109: no), the CPU101 shifts the process to S103, and repeats S103 to S109. When the lower edge flag is set to 0 in S70 of the main process (yes in S109), the CPU101 stops driving of the lower grip motor 72 (S111), the process shifts to S101, and the CPU101 enters a standby state.

Referring to fig. 23, the top edge control process is explained. The CPU101 executes the upper edge control processing in parallel with the main processing. The CPU101 determines whether or not to start the upper edge control process (S121). When the upper edge flag stored in the storage device 104 is 0 (S121: no), the CPU101 stands by. When the upper edge flag is set to 1 in S64 of the main processing (S121: yes), the CPU101 determines whether or not the upper specific end portion 6A is at the upper detection position based on the detection result of the upper detection section 85 (S123). When the CPU101 determines that the upper specific end portion 6A is at the upper detection position (S123: YES), the CPU101 controls the upper grip motor 38 to rotate the upper grip roller 32 in the third output direction (S125). The third feeding direction is a rotational direction of the upper pinch roller 32 when the lower end of the upper pinch roller 32 goes to the right. The CPU101 shifts the process to S129.

When the CPU101 determines that the upper specific end portion 6A is not at the upper detection position (S123: no), the CPU101 controls the upper pinch motor 38 to rotate the upper pinch roller 32 in the fourth output direction (S127). The fourth output direction is the reverse of the third output direction. The CPU101 shifts the process to S129.

The CPU101 determines whether or not the top edge control processing is ended (S129). Until the upper edge flag becomes 0 in S70 of the main process (S129: no), the CPU101 shifts the process to S123 and repeats S123 to S129. When the upper edge flag is set to 0 in S70 of the main process (S129: yes), the CPU101 stops driving of the upper clamp motor 38 (S131), the process proceeds to S121, and the CPU101 enters a standby state.

During the bonding process, the CPU101 repeats S103 to S109 of the lower edge control process and S123 to S129 of the upper edge control process. Therefore, the bonding apparatus 1 can control the length in the left-right direction of the lower specific end portion 8A and the upper specific end portion 6A overlapped in the up-down direction within a certain range.

During the execution of the bonding operation, the lower sheet 8 positioned below the discharge port 13 causes resistance to conveyance by the lower conveyance roller 64 and the upper conveyance roller 12 due to the viscosity of the adhesive Z positioned between the discharge port 13 and the lower sheet 8. Therefore, the lower sheet 8 located between the nozzle 11 and the conveyance position is stretched in the front-rear direction during the bonding operation, and a tension acts on the lower sheet 8. After the adhesion operation is stopped, the discharge of the adhesive Z from the discharge port 13 is stopped, and the tension acting on the lower sheet 8 is eliminated, and in this case, the stretched lower sheet 8 may be moved in the front-rear direction. Since the position of the lower sheet 8 in the front-rear direction changes when the bonding operation is stopped and when the bonding operation is restarted, a portion of the lower sheet 8 to which the adhesive Z is not applied may be generated when the bonding operation is restarted. In the present embodiment, when the bonding operation to the upper sheet 6 and the lower sheet 8 is stopped, the CPU101 switches the holding mechanism 800 from the released state to the held state, and by doing so only, the bonding apparatus 1 can hold the lower sheet 8 between the holding member 810 and the turn support portion 314. Therefore, the bonding apparatus 1 can suppress the lower sheet 8 from moving in the front-rear direction during the period from the time when the bonding operation is stopped to the time when the sheet is restarted, and can more easily and reliably suppress the occurrence of the portion of the lower sheet 8 where the adhesive Z is not applied.

The holding mechanism 800 can be switched to the holding state only by moving the holding member 810 by the driving of the air cylinder 809, and thus the holding mechanism 800 can hold the lower sheet 8 between it and the turn support 314. Therefore, the holding mechanism 800 can easily hold the lower sheet 8 with the holding member 810. The bonding apparatus 1 can simplify the holding mechanism 800.

After the holding mechanism 800 is switched to the holding state, the CPU101 drives the lower conveyance motor 63 and the upper conveyance motor 112, and conveys the lower sheet 8 and the upper sheet 6 until a prescribed holding time elapses. The lower sheet 8 between the holding member 810 and the nozzle 11 is stretched in the front-rear direction. Therefore, the bonding apparatus 1 can more reliably suppress the lower sheet 8 from moving in the front-rear direction after the bonding operation is stopped.

The operator can freely set the predetermined time according to the material of the lower sheet 8 and the upper sheet 6. Therefore, the bonding apparatus 1 can be easily controlled so as to suppress the movement of the lower sheet 8 and the upper sheet 6 in the front-rear direction due to the tension.

The CPU101 switches the holding mechanism 800 from the holding state to the release state after the release timing comes when the conveyance of the upper sheet 6 and the lower sheet 8 is started. The bonding apparatus 1 can start conveyance from a state where the lower sheet 8 is held. The bonding apparatus 1 can start conveying the lower sheet 8 in a state where the movement of the lower sheet 8 in the front-rear direction is restricted, and therefore, the occurrence of a portion of the lower sheet 8 where the adhesive Z is not applied can be reliably suppressed.

The operator can freely set the release timing in accordance with the stretchability of the lower sheet 8. Therefore, the bonding apparatus 1 can reliably suppress the occurrence of the portion of the lower sheet 8 to which the adhesive Z is not applied, regardless of the material of the sheet or the like. Therefore, the bonding apparatus 1 is convenient to use.

The holding member 810 aligns the holding position when holding the lower sheet 8 between it and the rotary support 314 with the discharge port 13 in the conveying direction. Therefore, the bonding apparatus 1 can suppress the lower sheet 8 held by the holding member 810 from being inclined with respect to the front-rear direction when the bonding operation is stopped.

The lower detection unit 78 can detect the presence or absence of the lower specific end portion 8A. When conveying the lower sheet 8 and the upper sheet 6, the CPU101 swings the lower pinch roller 76 from the lower exit position to the lower pinch position, and reciprocally rotates the lower pinch roller 76 in accordance with the detection result of the lower detection portion 78. The holding member 810 holds the lower sheet 8 by sandwiching the lower sheet 8 between the holding member and the rotation support portion 314 at a position above the shaft portion 75. Therefore, the bonding apparatus 1 can avoid the contact between the holding member 810 and the shaft portion 75, and can suppress the lower sheet 8 from being inclined with respect to the front-rear direction.

In the above description, the lower sheet 8 is an example of the discharge sheet of the present invention. The cylinder 809 is an example of the driving portion of the present invention. The rotation support portion 314 is an example of the arrangement member of the present invention. The shaft portion 75 is an example of a rotating shaft of the present invention. The lower nip roller 76 is an example of the roller of the present invention. The support frame 73 is an example of the swing portion of the present invention. The cylinder 931 is an example of the swing driving portion of the present invention. The lower clamp motor 72 is an example of a motor of the present invention. The lower detection unit 78 is an example of the detection unit of the present invention.

The present invention is not limited to the above embodiments. The discharge port 13 of the nozzle 11 may be provided above the horizontally extending portion. In this case, the nozzle 11 discharges the adhesive Z to the upper sheet 6, and the holding member 810 holds the upper sheet 6 by sandwiching the upper sheet 6 between the holding member and the turn support 314. In this case, the upper sheet 6 is an example of the discharge sheet of the present invention. Instead of the lower feed roller 64 and the nozzle lower roller 65, the feed mechanism 20 may have a feed belt. The conveyor belt is disposed below the nozzles 11.

The holding position of the holding member 810 when holding the lower sheet 8 between it and the rotation support portion 314 may be aligned in the front-rear direction with at least a part of the discharge port 13, and may be vertically shifted from the discharge port 13. The holding member 810 may hold the lower sheet 8 between it and a member other than the rotation support portion 314, or the holding position and the discharge port 13 may not be aligned in the front-rear direction.

The holding member 810 may be provided above the shaft 75 and may be formed in a spherical shape, or may be formed in a cylindrical shape extending in the left-right direction above the shaft 75, instead of being formed in a substantially U-letter shape that opens downward in front view.

The release timing may be at the same time as the restart of the transport operation (S91), or may be before the restart of the transport operation. In this case, the CPU101 executes S91 and S94 at the same time or S94 before S91. The operator may set any one of the following cases in S6 of the setting process: the releasing timing is made to coincide with the conveying operation restart after the conveying operation restart and before the conveying operation restart.

The holding member 810 may hold the lower sheet 8 without directly contacting the lower sheet 8. For example, the holding member 810 that is switched from the unclamped state to the held state may be moved upward, and may be brought into contact with the lower pinch roller 76 at the lower pinch position from below to bias the lower pinch roller 76 upward. In this case, the holding member 810 indirectly holds the lower sheet 8 by sandwiching the lower sheet 8 between the holding member 810 and the turn support 314 via the lower pinch roller 76. When the lower pinch roller 76 holds the lower sheet 8 by pinching the lower sheet 8 between it and the rotary support 314, the holding mechanism 800 including the holding member 810 may be omitted. In this case, a driving unit (such as an air cylinder) for biasing the lower nip roller 76 upward may be provided. In this case, the lower nip roller 76 is an example of the holding member of the present invention, and the driving portion is an example of the driving portion of the present invention.

Claims (8)

1. A bonding apparatus comprising:

a nozzle (11) from which the adhesive is discharged; and

a conveying mechanism (20) that conveys an upper sheet and a lower sheet in a conveying direction while crimping the upper sheet and the lower sheet with the adhesive discharged from the nozzle in between,

it is characterized in that the preparation method is characterized in that,

the bonding apparatus includes a holding mechanism (800) capable of switching between a holding state in which the holding mechanism holds a discharged sheet, to which the adhesive discharged from the nozzle is attached, at a position upstream of the nozzle in the conveying direction, and a released state in which the holding mechanism releases the discharged sheet,

the holding mechanism is configured to assume the unclamped state when the upper sheet and the lower sheet are conveyed by the conveying mechanism, and to switch the holding mechanism from the unclamped state to the held state when the adhesion of the upper sheet and the lower sheet is stopped.

2. Bonding device according to claim 1,

the holding mechanism has:

a holding member (810) provided upstream of the nozzle in the conveying direction, the holding member being moved to switch between the holding state in which the discharged sheet is held and the release state in which the discharged sheet is released; and

a drive section (809) that moves the holding member.

3. Bonding device according to claim 2,

the discharged sheet is the lower sheet,

the bonding apparatus comprises an arrangement member (314) which is provided on the upstream side of the nozzle in the conveying direction and is arranged between the upper sheet and the lower sheet,

the holding member holds the lower sheet by sandwiching the lower sheet between the holding member and the arranging member when the holding member is in the holding state.

4. Bonding device according to claim 3,

after the holding mechanism is switched from the unclamped state to the held state, when a predetermined holding time, which is a predetermined time, has elapsed, the discharge of the adhesive from the nozzle and the drive of the conveyance mechanism are stopped.

5. Bonding device according to claim 3,

switching the holding mechanism from the holding state to the unclamped state at the start of conveyance of the upper sheet and the lower sheet.

6. Bonding device according to claim 5,

the holding mechanism is switched from the holding state to the unclamped state when a unclamping timing as a predetermined time comes from the start of conveyance of the upper sheet and the lower sheet.

7. The bonding apparatus according to any one of claims 3 to 6,

the nozzle has a discharge port for discharging the adhesive,

the holding member holds the lower sheet at a position aligned with the discharge port in the conveying direction.

8. Bonding device according to claim 7,

the bonding device comprises:

a rotating shaft (75) extending in the conveying direction;

a roller (76) provided on the rotating shaft at a position downstream of the holding member in the conveying direction;

a swinging unit (73) that is provided upstream in the conveying direction from the holding member, and that supports the rotating shaft by the swinging unit, the swinging unit being capable of swinging about an axis extending in the conveying direction at a position offset from the rotating shaft;

a swing drive unit (931) that swings the swing unit;

a motor (72) that rotates the rotating shaft; and

a detection unit (78) that can detect the presence or absence of one end of the lower sheet in a predetermined direction orthogonal to the vertical direction and the conveyance direction,

the roller is swingable between a nipping position where the roller nips the lower sheet between the roller and the arrangement member and a lower position lower than the nipping position by the drive of the swing drive portion,

moving the roller from the lower position to the nip position when the lower sheet and the upper sheet are conveyed by the conveying mechanism, driving the motor in accordance with a detection result of the detecting section, and reciprocally rotating the roller,

the holding member holds the lower sheet by sandwiching the lower sheet between the holding member and the arranging member at a position above the rotation axis when the holding member is in the holding state.

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