JPS58486Y2 - Sealing machine for bottom punching - Google Patents

Description

[Detailed description of the invention] The present invention relates to a bottoming binding machine, in which a wire drawing device is placed between a wire feeding device and a wire feeding reel, and a predetermined length of wire is drawn before the wire feeding device operates. To provide a bottoming binding machine which can reliably supply a predetermined length of wire to a stapler body without putting strain on a wire feeding device by having a structure in which a wire rod is pulled out from a wire supply reel. The purpose is to

2. Description of the Related Art In general, a bottom-sealing machine is known that is configured to drive a binding needle into the bottom of a corrugated cardboard box from below.

This type of bottom binding machine usually uses a wire feeding device to pull out the wire wound on a wire supply reel to the length required for the binding needles, and then cuts the pulled out wire to cover the bottom of the cardboard box. It is said that it is configured to be typed into.

However, the wire feeding device of the conventional bottoming binding machine described above is
The wire rod wound on the wire rod supply reel must be pulled out against the rotational resistance torque of the wire rod supply reel and simultaneously fed in a predetermined direction, which requires only a large amount of power to feed the wire rod. However, the disadvantage is that a large load acts on the wire clamping section of the wire feeding device, shortening its lifespan.

In addition, since the wire rod supply direction of the wire rod supply reel and the wire rod feed direction of the wire rod feeding device are different from each other, the wire rod fed from the wire rod supply reel is easily subjected to bending changes at the entrance of the wire rod feeding device. Therefore, there is a drawback that the wire rod cannot be accurately guided in a predetermined direction with respect to the main body of the stapler.

In addition, if a wire rod is fed into the main body of the staple binding machine because the wire rod feeder pulls the wire rod at a steep angle with respect to the normal wire rod feeding direction, the wire rod is likely to buckle around this bent portion. In extreme cases, the wire rod may become entangled with parts within the staple binding machine main body, making it impossible for the staple binding machine to operate normally.

The present invention eliminates the above-mentioned drawbacks, and an embodiment thereof will be described below with reference to the drawings.

Fig. 1 is a front view of an embodiment of the bottom punching sealing machine according to the present invention, Fig. 2 is an enlarged longitudinal sectional view taken along the line X-X in Fig. 1, and Fig. 3 is an enlarged longitudinal sectional view taken along the line
4 and 4 are circuit diagrams of an embodiment of the pneumatic and Ni control circuits of the stapler, respectively, and FIG. 5 is a time chart for explaining the operation of each of the circuits.

As shown in FIG. 1, the bottom sealing machine 1 is constructed by installing a sealing machine main body 4 on the underside of a conveyor 30 such as a conveyor for conveying the cardboard boxes 2, for example.

The sealing machine main body 4 has a sealing head 4a, and the sealing head 4a has a piston-cylinder mechanism 5 for driving the wire rod.
is driven in the vertical direction in FIG. 1, and a wire rod cut to a predetermined size is driven into the bottom surface of the cardboard box 2 held down by the box presser 6.

In this embodiment, the piston/cylinder mechanism 5 is of a spring bank type.

A wire feeding device I is provided on the side surface of the sealing machine main body 4.

The wire feed device 1 includes a fixed clamp 8 and a movable clamp 10 that is driven up and down at predetermined timing by a wire feed piston/cylinder mechanism 9.

The fixed clamp 8 and the movable clamp 10 each have a pair of rollers 8a, 8b and a roller 10a.

10b, and the wire 12 wound around a wire supply reel 11, which will be described later, is distributed between the rollers 8a and 8b and between the rollers 10 and 10.
It is held between a and 10b.

The movable clamp 10 clamps the wire 12 only when moving upward, and does not clamp the wire 12 when moving downward.

The wire rod supply reel 11 is rotatably provided on a support base 13, and the wire rod 12 wound on the reel 11 is wound in a predetermined winding state by a wire pressing roller 14Vc so that no slack is formed on the outer circumference of the reel 11. It's being passed around.

The wire pressing roller 14 is in close contact with the outer circumference of the wire 12 energized by the spring 15 .

The wire rod drawing device 16 constitutes the main part of the present invention, and is a piston rond 18 of the piston/cylinder mechanism 17 for drawing out the wire rod.
A roller support 19 is provided at the tip of the wire rod, and a wire drawing roller 20 is rotatably supported on the roller support 19.

The roller support 19 is provided with a pair of guide rollers 21 and 22 as shown in FIG.
, 22 are engaged with guide rails 23 provided along the moving direction of the piston rod 18, respectively.

Therefore, as the piston/cylinder mechanism 17 is driven, the wire drawing roller 20 is reliably guided in a predetermined direction.

Furthermore, since the load from the wire supply reel 11 when drawing out the wire is absorbed by the guide rail 23, the iron 18 will not be deformed due to bending stress.

A buckling detection switch 24 is provided at the wire exit portion of the wire drawing device 16, and is opened upon detecting buckling of the wire 12.

Further, a wire rod detection switch 25 is provided at the wire rod inlet portion of the wire rod drawing device 16, and is closed upon detecting the arrival of the wire rod 12.

In FIG. 3, a solenoid valve 26 is connected between a check valve 27 and the wire rod driving piston/cylinder mechanism 5, and is switched and controlled in accordance with the excitation and demagnetization of a solenoid 28.

When solenoid 28 is de-energized, Bau) 26a
is in communication with the exhaust port) 26e, and the working air from the air pressure source 29 is supplied to the cylinder chamber 5a of the piston-cylinder mechanism 5.
is not supplied.

The electromagnetic valve 30 is connected between the check valve 2[gamma] and the piston-cylinder mechanisms 9, 17 for wire feeding and wire drawing, and is switched and controlled in accordance with the excitation and demagnetization of the solenoid 31.

When the lunoid 31 is not energized, the port 30a
The air supply port 30sVC is connected to the exhaust port 30e, and the port 30b is connected to the exhaust port 30e.
Working air is supplied to the cylinder chambers 9a and 17a of each of the cylinders 70.

32 is a delay circuit connected between the port 30b of the solenoid valve 30 and the cylinder chamber 9b of the wire feeding piston/cylinder mechanism 9.

This delay circuit 32 is constructed by connecting a variable throttle 32a and a reverse Ih valve 32b in parallel, and since the working air supplied into the cylinder chamber 9b is exhausted only through the variable throttle 32a, the cylinder chamber 9b The exhaust speed of working air from the pump is small, and the moving clamp 10 driven by the histone cylinder mechanism 9 is slowly displaced upward.

A pressure detection switch 33 is provided between the air source 29 and the check valve 27, and is opened and closed when the air pressure source 29 supplies working air at a normal pressure.

In Fig. 4, 34 is a switch for detecting a cardboard box, and the first
As shown in the figure, it is fixed to the box presser 6, and is closed when the box presser 6 comes into contact with the bottom surface of the cardboard box 2.

Reference numeral 35 denotes a driving detection switch, which is provided near the passage of the sealing head 4a in the sealing machine main body 4, and is closed when the sealing head 4a moves up a predetermined stroke at the start of driving. It is opened when the hend 4a completes driving and returns to a downward movement to a certain IT.

The switch 34 is connected in series with the pressure detection switch 33, the wire detection switch 25, the buckling detection switch 24, and the solenoid 28, while the driving detection switch 35 is connected in series with the solenoid 31.

Next, the operation of the above-mentioned component device will be explained with reference to FIG.

The cardboard box 2, which has been raised into a box shape, is transported on the transport south 3 and reaches a sealing position.

Here, the box presser 6 presses the bottom surface of the cardboard box 2 from above.

Here, the normally open pressure detection switch 33 and the wire detection switch 25 are closed, and the normally closed buckling detection switch 2
4 is closed, so when the box presser 6 comes into contact with the bottom of the box 2 and the switch 34 is closed, the solenoid 26
is energized.

When the solenoid 28 is energized, the solenoid 28 is excited, and the air supply port 26s communicates with the port 26a, so that the cylinder chamber 5a of the piston-cylinder mechanism 5 is supplied with working air via the solenoid valve 26.

As a result, the sealing hand 4a inside the sealing machine main body 4 moves upward,
A wire rod 12 cut to a predetermined length is placed on the bottom of the cardboard box 2.
is entered.

When the sealing head 4a performs the sealing operation, the box presser 6 is automatically separated above the bottom surface of the cardboard box 2, and the switch 34 is opened.

When the switch 34 is opened, the solenoid 28 is deenergized and demagnetized.

As a result, the solenoid valve 26 is switched and the port 26a communicates with the exhaust port 26e, so that the working air in the cylinder chamber 5a of the driving piston/cylinder mechanism 5 is exhausted to the outside via the solenoid valve 26.

Therefore, the sealing hend 4a is the first one along with the piston rond.
It is displaced downward in the figure and returns to the original device.

On the other hand, when the switch 34 is closed and the sealing hand 4a moves upward, the sealing head 4a closes the driving detection switch 35 during the upward movement.

The time interval from when the switch 34 is closed to when the switch 35 is closed is determined each time, and is set to ΔT as shown in FIG. 5.

When the switch 35 is closed, the solenoid 31 is energized and the solenoid valve 30 is switched.

When the solenoid valve 30 switches, the air supply port 308 and port 30b
The port 30a communicates with the exhaust port 30e.
communicate with.

As a result, the cylinder chamber 9b of the wire rod feeding piston/cylinder mechanism 9 and the wire rod drawing piston/cylinder mechanism 17
Working air is supplied to the cylinder chamber 17b.

As a result, the movable flange 10 of the wire feeding device γ is displaced downward with the operation of the piston-cylinder mechanism 9, and the rollers 10a and 10b of the movable clamp 10 are displaced along the wire 12 to the vicinity of the fixed clamp 8.

At this time, the rollers 10a and 10b do not flang the wire 12, so the wire 12 is not displaced.

On the other hand, when working air is supplied to the cylinder chamber 17b of the piston/cylinder mechanism 17 for drawing out the wire rod, the piston rod 18 is displaced from the position shown by the solid line in FIG. roller 20
is the first wire rod 12 wound on the wire rod supply reel 11.
Pull it out to the right in the figure.

As a result, a length of wire 12 necessary for the next sealing is drawn out between the wire feeder γ and the wire supply reel 11, and the wire 12 is maintained in the state shown by the two-dot chain line in FIG. .

The driving switch 34, which is closed when the sealing head 4a moves upward, is opened when the sealing head 4a finishes driving and moves downward. 31 is demagnetized.

As the solenoid 31 is demagnetized, the air supply port 30s of the solenoid valve 30 communicates with the port 30a, and the port 30b communicates with the exhaust port 30e.

As a result, the cylinder chamber 9a of the wire rod feeding piston/cylinder mechanism 9 and the wire rod drawing piston/cylinder mechanism 1
Working air is supplied to the cylinder chamber 17a of No.7.

Here, since the cylinder chamber 9b of the piston/cylinder mechanism 9 for wire rod feeding is connected to the port 30b of the solenoid valve 30 via the delay circuit 32, the piston movement speed of the piston/cylinder mechanism 9 for wire rod feeding is This is smaller than the piston movement speed of the drawer piston/cylinder mechanism 11.

Therefore, the piston of the piston-cylinder mechanism 1γ moves from the position shown by the two-dot chain line in FIG. 1 to the position shown by the solid line in a short time;
The piston is slowly displaced upward from the drinking position shown by the two-dot chain line in FIG. 1 to the position shown by the solid line.

As a result, the wire 12, which had been pulled by the wire drawing row 220 and was in the position indicated by the two-dot chain line in FIG. The wire rod 12 is fed by the wire feeder I with a slack always being formed between it and the wire feed reel 11.

When the movable clamp 10 of the wire rod feeding device I moves upward, the wire 12 is strongly held and clamped between the rollers 10a and 10b. During this period, the wire rod 12 which has been pulled out in a slack state is supplied to the sealing machine main body 4 by reducing the length necessary for one sealing operation.

In this way, when the wire rod feeding device 7 feeds the wire rod 12, the wire rod 12 corresponding to the length to be sent has already been drawn out by the wire rod drawing device 16, and therefore the wire rod feeding device 1 can feed the wire rod 12 very easily. I can do it.

That is, since the wire feeding device γ does not need to directly pull out the wire 12 from the wire feeding reel 11, the rotational reaction torque of the wire feeding reel 110 does not act as a load on the movable clamp 10 when the wire feeding device 1 is activated.

Therefore, the wire rod feeding device 7 can feed the wire rod 12 without being overloaded (the wire rod 12 can be fed through the moving clamp 100, the roller 10
It is possible to reliably prevent the inconvenience that a and 10b are worn out in a very short period of time due to friction with the wire rod 12 and become unusable.

Further, when the wire rod feeding device 1 feeds the wire rod 12, the wire rod 12 is fed extremely smoothly without being deformed by the rotatable rollers 20, so that the wire rod 12 is subjected to sharp bending deformation.
If the wire rod 12 becomes entangled with the parts inside the binding machine main body 4,
There will be no inconvenience such as buckling due to deviation from the normal passage.

After a while after the wire rod 12 is fed by the wire rod feeder 7, the box presser 6 comes into contact with another part of the bottom surface of the corrugated box 2.

Then, the switch 34 is closed again and the sealing is performed by the same operation as described above.

In this case, the cardboard boxes 2 that have been sealed at two locations are transported on the transport surface 3 to the next step.

If buckling of the wire rod 120 is detected in the binding machine main body 4 during the binding operation, the buckling detection switch 24 is activated, the solenoid 28 is disabled, and the operation of the binding machine 1 is automatically activated. interrupted.

Further, when the cutting length of the wire 12 to be sealed is changed, the wire feeding amount and the wire drawing amount of the wire feeding device 7 and the wire wrapping device 16 may be changed as appropriate.

In the above embodiment, the wire drawing device 16 is configured to be driven by a pneumatic piston-cylinder mechanism 17vC, but the structure is not limited to this, and it may be configured to be driven using a working fluid other than air, such as hydraulic pressure. good.

Further, the wire drawing row 220 of the wire drawing device 16 may be reciprocated by a reciprocating device using, for example, an electric motor (not shown) instead of the piston/cylinder mechanism 17.

As mentioned above, the bottom sealing machine according to the present invention includes a sewing machine main body that is supplied with a wire, cuts it into a predetermined length, and inserts it into the bottom of the object to be sealed from below; A wire rod feeding device that is attached to the sealing machine body and sequentially supplies wire rods in predetermined lengths thereto, a wire rod supply reel wound with the wire to be sent to the wire rod feeding device, the wire rod feeding device and the wire rod. and a wire rod drawing device which has a piston-cylinder mechanism provided between the wire rod feeder and the wire rod feeder and is activated before the wire rod feeder feeds the wire rod to draw out a predetermined length of wire rod from the wire rod supply reel in advance. Because of this structure, when the wire feeding device operates, the wire to be fed is drawn out in advance by the wire drawing device, and this Jt causes the wire feeding device to forcefully resist the rotational resistance torque of the wire feeding reel. There is no need to feed the wire rod, so the wire rod can be constantly and stably fed to the sealing machine body without forcing it, and since no excessive force is applied to the wire rod when the wire rod feeding device is activated, the wire rod is A sealing device that can reliably prevent bending deformation and buckling, and therefore supplies the wire wound on the wire supply reel directly to the sealing machine body only by the feeding action of the wire feeding device. It has features such as being able to reliably prevent inconveniences such as the wire being bent when feeding the wire and being guided to a place other than the designated wire passage within the sealing machine body, resulting in a mess. have

[Brief explanation of the drawing]

Fig. 1 is a front view of one embodiment of the bottoming sealing machine according to the present invention, Fig. 2 is an enlarged longitudinal sectional view taken along the line X-X in Fig. 1, and Fig.
4 and 4 are circuit diagrams of one embodiment of the pneumatic and electrical control circuits of the sealing machine, respectively, and FIG. 5 is a time chart for explaining the operation of each of the circuits. 1... Bottom punching sealing machine, 2... Cardboard box, 3... Conveyance surface, 4... Bomber main body,
5...Piston/cylinder mechanism for driving green materials, T
...Irrigation material feeding device, 9...Piston/cylinder mechanism for feeding irrigation material 1.11...Irrigation material supply reel, 12...Heat material, 16... ... Warm material drawing device, 17... Piston/cylinder mechanism for drawing out rejuvenating material.

Claims (1)

[Scope of utility model registration request] A stapler body that is supplied with wire, cuts it to a predetermined length, and drives it into the bottom of the object to be bound from below, and a stapler body that is attached to the stapler body and sequentially cuts the wire to a predetermined length. a wire rod feeding device that feeds the wire rod, a wire rod feeding reel wound with the wire rod to be fed, and a piston/cylinder mechanism provided between the wire rod feeding device and the wire rod feeding reel; A bottoming binding machine comprising a wire drawing device which is operated before the wire feeding device feeds the wire and draws out a predetermined length of wire from a wire feeding reel.