JPH11188801A - Device for bonding thin box edge - Google Patents

Abstract

PROBLEM TO BE SOLVED: To bond a joint part of a thin box edge efficiently and at a low cost by using instantaneous adhesive. SOLUTION: A thin box edge material with a joint part with a coating of a small amount of instantaneous adhesive applied mechanically in a point-shape is manually inserted sequentially through clamping means C1, C2, C3, C4 installed on the tip parts of four clamping arms 5 which are radially fitted, at an interval of 90 deg., on a ratchet wheel 3 rotating by 90 deg., and then is mechanically held. Further, when time required for bonding is past after the clamping arms 5 rotate 90 deg. each, three times, the clamping means C1, C2, C3, C4 are automatically opened to release the clamping, to drop the bonded thin box edge.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a folding box edge bonding apparatus for bonding folded both ends of a folding box edge material by applying a cyanoacrylate-based instantaneous adhesive and sandwiching and joining the overlapping portions.

[0002]

2. Description of the Related Art A conventional folding box edge is formed by applying an adhesive such as a hot melt to both ends of a bent portion of a strip made of a strip of wood or a plastic foam plate, which is V-cut. At present, it is almost manually performed, and recently, only a gluing operation is mechanized (for example, Japanese Patent Application No. 8-209 related to the present applicant's application).
153) has begun to be used.

[0003]

When an instant adhesive is used for bonding the edges of the folding box, productivity can be improved because quick bonding can be obtained. However, the amount of adhesive to be applied by hand is more than necessary. It has not been used until now because there is a problem that the amount is applied and the cost becomes high.

[0004]

SUMMARY OF THE INVENTION In order to solve the above problems, the present invention adjusts the amount of instantaneous adhesive used to a certain minimum required amount, applies the adhesive, presses and holds the adhesive portion, and fixes it. By mechanizing a series of operations to release the clamp later,
It is possible to reduce the cost of the adhesive by minimizing the amount of the instantaneous adhesive to be used to a certain minimum, and to securely clamp the bonded portion by mechanically sandwiching the bonded portion, thereby improving the productivity.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention relates to a folding box edge bonding apparatus for bonding folded end portions of an elongated plate-shaped folding box edge material by sandwiching and joining a superposed joint portion by applying an instant adhesive. On the main shaft that reciprocates by a fixed angle each time it is started, a disc cam having a concave portion at one place on the outer periphery, and a ratchet pawl with a pawl hook on one side near the outer periphery is fixed, A ratchet ratchet having a ratchet pawl approaching one side of the disc cam having the ratchet pawl and having a plurality of claw engaging portions for engaging with the ratchet pawl at a plurality of equally-spaced outer circumferences having a smaller diameter than the disc cam. Is loosely fitted on the main shaft, and the same number of clamp arms as the number of the hook portions are radially mounted on the ratchet ratchet wheel at equal intervals, and near the tip of the clamp arm, the outer periphery of the disk cam is pressed by a pressure spring. Cam which is always pressed When the cam rotator is in contact with the circumferential portion of the disk cam, the base of the trochanter arm supporting the leading end of the rotator is in contact with the circumference of the disc cam, and the joint of the folding box edge is sandwiched between the clamp arms. A folding box rim provided with a base end of a clamp member holder, which is provided with a clamp member for releasing the clamped portion of the folding box edge when the cam rotator is in contact with the concave portion of the disc cam; It is a bonding device.

Further, an instant adhesive container for adhering the folding box edge material is supported on a vertically movable column so as to be vertically adjustable. Hangs over a gluing table (40) provided with a folding box rim detection sensor provided at the front end, holds the lower end of the adhesive coating tube (32) near the distal end, and fixes the base end to the gluing device box (33) The middle of the tube holding arm (34), which is rotatably supported, is moved up and down so that the tip of the adhesive application tube (32) is placed on the glue table (40). When the detection sensor detects, the glue motor (3) is brought into contact with the glued portion of the folding box edge material (32) and then returned.
6) A folding box having a gluing means including a cam disk (37) driven by the above, a limit switch (38) for stopping the cam disk every one rotation, and a limit switch operating disk (39). It is an edge bonding device.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to the drawings, FIG. 1 is a front view showing a main part of an embodiment of a folding box edge bonding apparatus according to the present invention. FIG. FIG. 3 is a view showing a state in which the shaft is strongly rotated by 90 °, FIG. 3 is a view in which an axis portion of FIG. 1 is longitudinally cut, and FIG.

At the tip of the main shaft 1, the center of a disk cam 2 having a concave portion 2a at one place on the outer periphery is fixed by a key 2b. A ratchet ratchet wheel 3 having a smaller diameter than the cam 2 and having pawl hooks 3a at four equally-divided portions on the outer periphery is loosely fitted to the main shaft 1 in a freely rotatable manner.
A ratchet pawl 4 that engages with the pawl 3a is pivotally supported on the side surface of the disc cam 2 with a pawl spring 4a.

On the side of the ratchet ratchet wheel 3 on the side opposite to the disk cam, four clamp arms 5 are attached in a cross shape at 90 ° intervals, and on one side near the tip of the clamp arm 5, a folding box shown in FIG. Clamping means C for sandwiching and bonding a joining portion 51 in which both ends of the edge 50 are coated with an adhesive and overlapped
1, C2, C3 and C4 are provided respectively.

The clamping means C1, C2, C3, C4 are
A fulcrum shaft 6 in the width direction is provided on one side surface near the tip of the clamp arm 5, and the fulcrum shaft 6 has at its tip a cam rotator 7 which is always in contact with the outer periphery of the disc cam 2. 8
And the lower end of the clamp member holder 9 are rotatably supported. The clamp member holder 9 has
A large extension 9a extending in the distal direction of the clamp arm 5,
Having a small extension 9b extending in the direction of the trochanter holding arm 8,
A trochanter pressing spring 10 is stretched between the small extension 9b and the clamp arm 5, and a first adjustment screw 11 for adjusting the position of the trochanter arm 8 relative to the small extension 9b is provided. Due to the tension of the trochanter pressing spring 10, the cam rotator 7 is constantly pressed against the outer periphery of the disk cam 2 from the small extension 9b via the first adjusting screw 11 and the trochanter holding arm 8.

A clamp member 1 for holding a joint 51 formed by gluing and overlapping both ends of a folding box edge 50 shown in FIG.
2 with the holding surface facing the side surface of the clamp arm 5,
The rear end is rotatably supported at a position close to the fulcrum shaft 6, and a tension spring 14 is stretched between the large extension 9a and the clamp member 12. Further, the clamp member 12 is attached to the large extension 9a. A second adjusting screw 15 is provided to adjust the relationship between the holding surface of the clamp arm 5 and the side surface of the clamp arm 5 so as to be parallel when holding the joint 51 at the edge of the folding box.

Reference numeral 16 denotes a stopper, which is attached to the clamp arm 5 with a fixing screw 17 to position an adhesive portion on the edge of the folding box to be adhered. The stopper is moved and adjusted in the longitudinal direction of the clamp arm 5 to be fixed.

Next, a drive system of the main shaft 1 will be described with reference to a longitudinal section of a main part of FIG. 3 and FIG. The main shaft 1 is rotatably supported by bearings 22, 22 in a bearing cylinder 21 attached to the outside of the body 20, and a rotating arm 23 that rotates strongly by 90 ° is provided at the rear end inside the body 20. The pivot arm 23 is fixed by a key 23a.
One end of a crank rod 24 is rotatably connected to the tip of the arm.

A drive motor 2 provided at a lower part in the body 20
5, a crank disk 26 is mounted via an electromagnetic clutch 27. The other end of the crank rod 24 is connected near the outer periphery of the crank disk 26. Set limit switch 28 to
N, a limit switch operating projection 26a for turning off the electromagnetic clutch 27 is provided in a protruding manner. An electromagnetic brake 29 is interposed between the tip of the main shaft 1 and the ratchet pawl 3 to control the inertia when the ratchet pawl 3 is rotated by 90 ° by the ratchet pawl 4 and to stop it reliably. I have.

Next, the gluing means shown in FIGS. 5, 6 and 7 will be described. This gluing means is attached to the folding box edge bonding apparatus, and is arranged at a position where the operator can easily use the instant adhesive container 30. The instant adhesive container 30 is vertically adjustable by the support 31a on the lifting column 31. It is supported with the opening facing downward, and a thin adhesive coating tube 32 is connected to the opening at the lower end and hangs down. The base near the tip is rotatably supported inside the gluing device box 33 and the base end is rotatably supported. Supported by the distal end of the tube holding arm 34.

When the instant adhesive container 30 is used, a small hole is formed at the upper end to make the inside of the container at atmospheric pressure.
Although it naturally flows down due to gravity in the adhesive coating tube 32, by selecting the inner diameter of the adhesive coating tube 32, it does not drop naturally from the lower end of the adhesive coating tube 32 in consideration of viscosity. When the lower end of the adhesive application tube 32 comes into contact with the folding box edge 50, a fixed amount of instant adhesive is applied in a dot-like manner, and the amount of application is adjusted by moving the adhesive container 30 up and down The head is adjusted to change the head.

FIGS. 5 and 6 show only one instant adhesive container 30 and one adhesive application tube 32. However, when the width of the folding box edge 50 is large, two of the same ones are arranged in parallel. In some cases, it is provided in a dot-like manner at two places in the width direction.

A rolling element 35 is attached to the tube holding arm 34 in the gluing device box 33 in the middle of the gluing device box 33, and the rolling element 35 is attached to a shaft of a gluing motor 36 in the gluing device box 33. Attached to the outer periphery of the cam disk 37 having a concave portion 37a at one place on the outer periphery, the limit switch 38 is turned on in parallel with the cam disk 37. OFF
For this purpose, a limit switch actuation disk 39 having an actuation recess 39a at one place on the outer periphery is provided.

Below the lower end of the adhesive coating tube 32,
Gluing table 40 mounted outside gluing device box 33
Is provided above the gluing table 40. A folding box edge material detection sensor 41 for detecting an edge to be glued of the folding box edge material 52 placed on the gluing table 40 is provided.

The description of the configuration has been completed above, and then the operation will be described. First, in order to glue one end of the band-shaped folding box edge material 52 by the gluing means shown in FIGS. 5, 6, and 7, the tube holding arm 3 is attached to the outer periphery of the cam disk 37 as shown in FIG.
4, the tip of the adhesive application tube 32 is raised, and the limit switch 3
8 is OFF and the gluing motor 36 is stopped, and the operator attaches one end of the folding box edge material 52 to the gluing table 40.
Put on.

The folding box edge material 5 placed on the glue table 40
2 is detected by the folding box edge detection sensor 41, the gluing motor 36 is driven, the cam disk 37 starts rotating in the direction of the arrow, and the rolling element 35 fits into the recess 37a in the state of FIG. As a result, the tip of the tube holding arm 34 is lowered, the adhesive application tube 32 is lowered, and the tip of the tube 32 comes into contact with the fold box rim 52 to immediately apply the instant adhesive in a dot-like manner. After returning, the limit switch actuating disk 39 turns off the limit switch 38 and lifts the adhesive application tube 32, stops and waits.

When the end portions of the folding box rim 52 to which the instantaneous adhesive has been applied in this manner are overlapped with each other in the state shown in FIG. 8, the instantaneous adhesive applied in a dot-like manner spreads and the bonding surface is enlarged. With the folding box edge 50 in this state held in hand, the joining portion 51 with the ends overlapped is moved to the left side of the clamping means C1 of the clamping arm 5 which is stopped in the horizontal state shown in FIG. The clamp 7 comes into contact with the recess 2 a of the disk cam 2, and the clamp member 12 is inserted into the holding opening 18 distant from the clamp arm 5, placed on the clamp arm 5, and hits the stopper 16.

Subsequently, a foot switch (not shown) is turned on.
Then, by turning on the electromagnetic clutch 27, the rotation of the drive motor 25 started in advance is transmitted to the crank disk 26, and the crank disk 26 stopped in the state shown by the solid line in FIG. When one turn in the direction of the arrow,
When the limit switch operating projection 26a provided on the outer periphery of the crank disk 26 turns on the limit switch 28 to turn off the electromagnetic clutch, the crank disk 26
After rotating and stopping, the rotating arm 23 rotates through the angle θ (more than 90 °) via the crank rod 24, and then returns to the original position and stops.

When the rotary arm 23 is in the state shown by the imaginary line in FIG. 4 in which the rotary arm 23 has rotated by the angle θ, the main shaft 1 is rotated by the rotation of the rotary arm 23 and fixed to the main shaft 1 by the key 2b. The disk cam 2 is moved 90 degrees in the direction of the arrow L shown in FIG.
2 (the ratchet pawl 3 does not move because it is fixed by the electromagnetic brake 29), and the clamping means C1 moves the cam rotator 7 to the outer periphery of the disc cam 2. After climbing, the clamping portion opening 18 is closed to clamp the joint portion 51 at the edge of the folding box, and the lower clamp means C4 in FIG. The clamping unit 5 is opened to open the holding portion opening 18, and the folded box edge 50, which has been bonded and completed, is dropped.

Subsequently, when the rotating arm 23 returns from the state shown by the imaginary line in FIG. 4 by the angle θ and stops at the position shown by the solid line, the disc cam 2 moves 90 degrees in the direction of the R arrow shown in FIG. °
1 and the ratchet pawl 4 attached to the disc cam 2 engages with the pawl hook 3a of the ratchet pawl 3 to rotate the ratchet pawl 3 by 90 °.
By rotating, the clamp means C4 having the holding portion opening 18 facing downward in FIG. 2 rotates counterclockwise with the clamp arm 5 to the state of FIG. 1, and the holding means C1 of FIG. The folded box edge 50 turns 90 ° and moves upward.

That is, when the foot switch (not shown) is set to 1
Each time the disk is turned ON, the disk cam 2 reciprocates 90 degrees and reciprocates, and the ratchet pawl 3 rotates clockwise by 1/4 turn in FIG. 1, and the clamp means (C1), (C2), (C
3) and (C4) hold the folding box edges 50 one by one and release the holding after the curing time of the instant adhesive has passed for three operation times (3/4 rotation time).

[0027]

The present invention is embodied in the form described above and has the following effects.

A conventional hot melt or the like is used by using an instant adhesive to bond the joints at the edges of the folding box and automatically releasing the holding after holding the joints on the machine for a necessary adhesive curing time. The labor and time required for holding and opening the bonded portion by manual work can be reduced, and the working efficiency can be greatly increased.

In order to bond the edges of the folding box, it was impossible to use an instant adhesive having a fast curing time and good workability due to its high cost. Overcoming cost barriers, the use of instant adhesives has become possible.

[Brief description of the drawings]

FIG. 1 shows a main part of the folding box edge bonding apparatus of the present invention,
It is the figure seen in the arrow P direction.

FIG. 2 is a diagram showing a state in which the bonding portion of the glued box edge is sandwiched from the state of FIG. 1 and the sandwiching of the folded box edge after bonding is released.

FIG. 3 is a vertical sectional side view of a main shaft portion of the folding box edge bonding apparatus of the present invention.

FIG. 4 is a view of the drive system of FIG. 3 as viewed in the direction of arrows QQ.

FIG. 5 is a front view showing a main part of a gluing device attached to the folding box edge bonding device of the present invention.

6 is a view showing a state in which the gluing device shown in FIG. 5 is gluing the folding box edge material.

FIG. 7 is a sectional view taken along a line AB in FIG. 5;

FIG. 8 is a perspective view showing an example of a folding box edge bonded by the folding box edge bonding apparatus of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Main shaft 2 Disc cam 2a Recessed part 3 Ratchet ratchet wheel 3a Pawl part 4 Ratchet pawl 4a Pawl hook 5 Clamp arm 6 Support shaft 7 Cam rotator 8 Rotor arm 9 Clamp member holder 10 Pressure contact spring 12 Clamp member 20 Airframe 21 Bearing cylinder 23 Rotating arm 24 Crank rod 25 Drive motor 26 Crank disk 27 Electromagnetic clutch 29 Electromagnetic brake 30 Adhesive container 31 Elevating column 32 Adhesive application tube 33 Pasting device box 34 Tube holding arm 35 Roller 36 Gluing motor 37 Cam disk 38 Limit switch 39 Limit switch actuation disk 40 Gluing table 41 Fold box edge detection sensor

Claims (2)

[Claims] 1. A folding box edge bonding apparatus for applying an instant adhesive to a folded box edge material in the form of an elongated plate to hold and bond the joined portions, wherein a fixed angle is set for each start-up. A circle having a recess (2a) at one place on the outer periphery on a main shaft (1) that reciprocates only and a ratchet pawl (4) with a pawl spring (4a) on one side near the outer periphery. The plate cam (2) is fixed and approaches one side surface of the disk cam (2) having the ratchet pawl (4). A ratchet pawl (3) formed with a pawl (3a) engaging with the ratchet pawl (4) is loosely fitted to the main shaft (1), and the ratchet pawl (3) is attached to the ratchet pawl (3). The same number of clamp arms (5) are radially mounted at equal intervals, and the number of clamp arms (5) Near the end, a base end of a trochanter arm (8) supporting at its distal end a cam rotator (7) constantly pressed against the outer periphery of the disc cam (2) by a pressing spring (10); When the child (7) is in contact with the circumference of the disk cam (2), the joint at the edge of the folding box is sandwiched between the clamp arms (5), and the cam rotator (7) is moved by the disk cam (2). When it is in contact with the recessed portion (2a), the base end of the clamp member holder (9) having the clamp member (12) for releasing the joint of the edge of the folding box is pivoted (13). A folding box edge bonding device, characterized in that it is provided. 2. An instant adhesive container (30) for adhering a folding box edge material is supported on a lifting column (31) so as to be vertically adjustable, and an adhesive application tube extending downward from the instant adhesive container (30). The lower end of (32) is connected to the folding box edge detection sensor (4) provided on the front of the gluing device box (33).
Hanging above the glue table (40) with 1),
The vicinity of the lower end of the adhesive coating tube (32) is held at the distal end, and the middle of the tube holding arm (34) rotatably supporting the base end of the glue applying box (33) is moved up and down. After the tip of the adhesive application tube (32) is brought into contact with the glued portion of the folding box edge material when the folding box edge material detection sensor (41) detects the folding box edge material placed on the glue table (40). Return, glue motor (36)
And a limit switch actuating disc (39) for stopping the cam disc every one rotation. 2. The folding box edge bonding apparatus according to 1.