JPH0586748B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a box gluing device having a main body and a flap adhered to the main body.

``Prior Art'' Conventionally, as a gluing device, a conveyor conveys a box having a main body and a flap bonded to the main body, and glue is applied to a predetermined position on the bonding surface of the main body and the flap. a bending member that bends the flap part and adheres it to the main body as the box is transported by the transport conveyor; A device is known that is equipped with a drive mechanism that moves the conveyor upstream in the conveyance direction, and a pressure contact mechanism that presses the flap portion against the main body when the conveyor stops abnormally (Japanese Patent Laid-Open No. 14966/1983). .

In the gluing device having the above configuration, when the conveyor is abnormally stopped while the gluing mechanism is applying glue to the box, the above control is performed instead of the conveyor conveying the box. The drive mechanism is operated by the device to move the gluing mechanism upstream in the transport direction of the box, and at the same time, the gluing mechanism continues applying glue, and when the glue application is completed, the pressure contact mechanism is actuated. The flap portion is brought into pressure contact with the main body portion.

"Problems to be Solved by the Invention" However, in the conventional device, when the above-mentioned gluing mechanism continues to apply glue when the conveyor stops abnormally, depending on the stopped state of the box, the box may not exist. Glue may be applied to a portion or there may be a shortage of glue, staining the surrounding area and making it difficult to apply glue reliably.

"Means for Solving the Problems" In view of such circumstances, the present invention provides the above-mentioned gluing device, which includes a first detector for detecting the transport position of the box by the transport conveyor, and a gluing device by the drive mechanism. a second detector that detects the moving position of the mechanism;
A control device is provided which inputs signals from the first detector and the second detector and controls the operation of the drive mechanism and the application of glue by the gluing mechanism, and the control device controls the conveyor. The non-glue pattern for the box is calculated according to the stop position of the box detected by the first detector when the box stops abnormally, and the driving mechanism and the glue applying mechanism are controlled to apply the glue to the box. Glue is applied according to an unapplied pattern.

"Operation" According to the above configuration, when the conveyor stops abnormally, the control device can accurately determine the stopping position of the box based on the signal from the first detector, so that the glue on the box can be accurately determined. An uncoated pattern can be calculated. Then, the drive mechanism moves the gluing mechanism upstream in the transport direction of the box, and at the same time,
If the position of the gluing mechanism is detected by the signal from the second detector and the gluing mechanism applies glue to the box according to the unapplied pattern, the box will be covered even when the conveyor stops abnormally. Since the glue can be applied accurately, the glue can be applied reliably without staining the surrounding area.

"Example" The present invention will be described below with reference to the illustrated example.
1 to 3, a box 1 is provided with an upper flap 1b and a lower flap 1c extending horizontally at upper and lower positions on both sides of a main body 1a, and the upper flap 1b is formed by a flap folding mechanism (not shown) or fixed. It has already been folded downward toward the main body portion 1a by the guide.

First fixed guides 3 for bending the lower flap 1c are disposed on both sides of the conveyor 2 for conveying the boxes 1, and the lower flaps of the boxes 1 conveyed by the conveyor 2 are disposed on both sides. 1c is guided along the first fixed guide 3 and is bent upward toward the already bent upper flap 1b.

A pressure contact member 5 constituting the pressure contact mechanism 4 is provided on the downstream side of each of the first fixed guides 3, and
When the pressure contact mechanism 4 is not in operation, the pressure contact member 5 is located in a retracted position continuous to the downstream side of the first fixed guide 3, receives the lower flap 1c guided by the first fixed guide 3, and maintains a constant position. The lower flap 1c can be guided in the folded state (see Fig. 3).

A gluing mechanism 6 for spraying and applying glue to the already bent upper flap 1b is provided at an outer position of both pressure contact members 5, and each gluing mechanism 6
The injection of glue is controlled by a control device 7. Then, the lower flap 1c of the box 1 coated with glue is transferred from the pressure contact member 5 to the second fixed guide 8 on the downstream side and bent upward.
It is pressed against the upper flap 1b and is integrally glued thereto.

The conveyor 2 is provided with pressing members 2a that press the boxes 1 at predetermined intervals, and a sprocket 11 that drives the conveyor 2.
The first rotary encoder is mounted on the rotating shaft 12 of the
A detector 13 is connected, and a pulse signal from the first detector 13 is input to the control device 7 and counted.

The first detector 13 rotates once when the conveyor 2 conveys the box 1 by a distance corresponding to the distance between adjacent pressing members 2a, and resets the count value of the control device 7. Therefore, since there is a certain relationship between the size of the count value and the position of the pressing member 2a, the conveyance position of the box 1 can be detected from the size of the count value.

Further, a detector 14 for detecting the presence or absence of the box 1 is provided at a position upstream of the gluing mechanism 6 by a predetermined distance, and a signal from the detector 14 is inputted to the control device 7 to detect the presence of the box 1. Only when this is confirmed, the glue can be sprayed from the glue applying mechanism 6.

Next, each of the gluing mechanisms 6 is provided in a common moving frame 15 in order to move each gluing mechanism 6 upstream when the conveyor 2 stops abnormally, and this moving frame 15 is connected to a frame 16. It is slidably attached to guide shafts 17 that are horizontally arranged and fixed on both sides of the. An air cylinder 18 for moving the movable frame 15 forward and backward is connected to the movable frame 15, and the operation of the air cylinder 18 can be controlled by the control device 7.

A rack 19 is attached to the tip of the air cylinder 18.
The rack 19 is engaged with a pinion 20 rotatably supported on the frame 16, and a second detector 21 consisting of a rotary encoder is connected to the rotation shaft of the pinion 20.

The pulse signal from the second detector 21 is input to the control device 7 and counted, and the control device 7 activates the air cylinder 18 to control the rack 19 and each adhesive. Before moving the mechanism 6 upstream, its count value is reset. Therefore, the control device can detect the movement position of each gluing mechanism 6 from the count value.

Further, as shown in FIG. 4, the pressure contact member 5 of the pressure contact mechanism 4 described above is fixed above the dogleg-shaped swing arm 22, and the central bent portion of the swing arm 22 is connected to the support shaft 23. It is swingably attached to the frame 16 by being rotatably supported. An air cylinder 24 for swinging the swing arm 22 is connected to the lower end of the swing arm 22, and the operation of the air cylinder 24 can also be controlled by the control device 7.

In the above configuration, before the gluing work starts, the gluing mechanism 6 is located in the non-operating position shown by the solid line in FIG. Located in position. When the type of box to be glued is input to the control device 7, the control device 7 selects a glue application pattern suitable for the box.

When the transport conveyor 2 is driven to transport the boxes 1 from this state, the control device 7 controls the first
Counting of pulse signals from the detector 13 is started. As mentioned above, there is a certain relationship between the size of the count value and the transport position of box 1, so
When the presence of the box 1 is confirmed by the signal from the detector 14, if glue is injected from the pasting mechanism 6 onto the box 1 over a predetermined range of the count value, the upper flap of the box 1 will be removed. Glue can be applied to 1b in a predetermined application pattern.

The upper flap 1b coated with glue in a predetermined application pattern in this way is transferred from the pressure contact member 5 to the second fixed guide 8 on the downstream side, bent upward and bonded to the upper flap 1b. be done.

Next, if the conveyor 2 is abnormally stopped for some reason while the glue is being sprayed onto the box 1 from the glue applying mechanism 6, the control device 7 immediately causes the glue applying mechanism 6 to spray the glue onto the box 1. Then, based on the count value from the first detector 13 at the time when the transport conveyor 2 is stopped, the unapplied pattern of glue on the box 1 is determined from the predetermined glue application pattern described above. Calculate the remaining pattern by subtracting the completed part.

Thereafter, the control device 7 operates the air cylinder 18 to move the gluing mechanism 6 toward the upstream side, counts pulse signals from the second detector 21, and uses the count value to move the gluing mechanism 6 toward the upstream side. 6
Detect the moving position of. Then, according to the unapplied pattern calculated above, the glue is sprayed from the glue applying mechanism 6 toward the box 1 at the required position while monitoring the moving position of the glue applying mechanism 6, resulting in the normal application of glue. Apply glue to box 1 in the pattern.

When the application of glue to the box 1 thus stopped is completed, the control device 7 operates the air cylinder 24 of the pressure welding mechanism 4 to advance the pressure welding member 5 to the forward position shown by the imaginary line in FIG. The lower flap 1c of the box 1 is pressed against the upper flap 1b to bond them together.

Note that if it is detected that the application of glue to the box 1 has already been completed when the conveyor 2 stops abnormally, the control device 7 simply operates the air cylinder 24 on the pressure welding mechanism 4 side. Of course, it is becoming more common. Further, the unapplied pattern of glue does not necessarily have to match the remaining pattern obtained by subtracting the already applied part from the predetermined glue application pattern, and may be a more simplified pattern.

Furthermore, the detector 14 may be disposed at the same position as the gluing mechanism 6, for example, and the count value of the pulse signal from the first detector 13 may be reset when a signal from the detector 14 is input. . In this case, since counting starts the moment the tip of the box 1 passes in front of the gluing mechanism 6, the transport position of the box 1 relative to the gluing mechanism 6 can be detected from the count value. .

"Effects of the Invention" As described above, according to the present invention, it is possible to accurately apply glue to the box even when the conveyor stops abnormally, so that the glue can be applied reliably without staining the surrounding area. This has the effect of being able to.

[Brief explanation of the drawing]

Figure 1 is a side view showing one embodiment of the present invention, Figure 2 is a side view showing one embodiment of the present invention;
1, FIG. 3 is a sectional view taken along line - in FIG. 2, and FIG. 4 is a sectional view taken along line - in FIG. 1. DESCRIPTION OF SYMBOLS 1... Box, 1a... Main body, 1b... Upper flap, 1c... Lower flap, 2... Conveyor, 3... First fixed guide, 4... Pressing mechanism, 5
... Pressure member, 6 ... Gluing mechanism, 7 ... Control device, 8 ... Second fixed guide, 13 ... First detector, 18 ... Air cylinder (drive mechanism), 21 ...
...Second detector.

Claims (1)

[Scope of Claims] 1. A conveyor for transporting a box having a main body and a flap adhered to the main body, and a gluing device for applying glue to a predetermined position on the adhesive surface of the main body and the flap. a bending member that bends the flap part and adheres it to the main body as the box is transported by the transport conveyor; a first detector for detecting the conveyance position of the box by the conveyor; , a second detector for detecting the position of movement of the gluing mechanism by the drive mechanism; inputting signals from the first detector and the second detector;
A control device that controls the operation of the drive mechanism and the application of glue by the glue applying mechanism is provided, and the control device is configured to control the stop position of the box detected by the first detector when the conveyor stops abnormally. A gluing device, characterized in that it calculates an unapplied pattern of glue for the box according to the unapplied pattern of the box, and controls the operation of the driving mechanism and the gluing mechanism to apply glue to the box according to the unapplied pattern. .