JPS584803Y2 - Band tightening force adjustment device for band-type packing machine - Google Patents

Description

[Detailed description of the invention] This invention involves wrapping a thermoplastic band around the baggage, tightening the band, and heat-pressing the upper and lower facing surfaces of both ends of the band to fix them.At the same time, the band is attached near the welded part. This relates to a band tightening force adjustment device for a band-type packing machine that cuts paper from its supply side.

When tightening a band on a package, the tightening force varies depending on the type of package, and the tightening completion point must not vary between packages packed using the same machine. Must be grasped accurately and sharply.

Furthermore, since the next step must be performed simultaneously with the completion of tightening, this must not be unclear.

The present invention is devised so that the tightening force can be easily applied from outside the device and without stopping the operation of the machine.

This will be explained with reference to the diagram.

1 is a feed roller, 1' is a rotating shaft, and 2 is a return roller, and the feed rollers 1 rotate in relation to each other in a direction to tighten the band for packing the baggage.

Reference numerals 3 and 4 denote rocking rollers that are respectively pivotally attached to both ends of a rocking rod 5 that can swing freely around a shaft 5', and when the rocking roller 3 is pressed against the feed roller 1, the band is moved inside the device. When the swing roller 4 is pressed against the return roller 2, the band is tightened.

6 is the band guide gutter.

Reference numeral 8 denotes a slide table, on which the cargo to be packed is placed.

9 is a band end insertion groove, and M is a microlever, which is connected to a solenoid SQL to be described later.

Reference numeral 7 denotes a first gripper, which inserts the end of the band around which the cargo is wound into the insertion groove 9, and grips the end of the band between it and the slide table 8 by raising the first gripper 7.

Reference numeral 10 denotes a second gripper, in which the supply side of the band whose end is gripped by the first gripper is pulled back by pressure contact between the return roller 2 and the swinging roller 4, and the tightening side of the band is held between the second gripper 10 and the slide table. Grip between 8 and 8.

Reference numeral 11 denotes a seal press head, which inserts a heating piece (not shown) between the upper band that has entered the insertion groove 9 and the lower band that is gripped by the second gripper 10 to press the melted upper and lower bands into the seal. Press head 11
As a result, the tightening end of the band is cut between the side surface 11' of the seal press head 11 and the side surface 7' of the first gripper 7, and at the same time, the tightening end of the band is cut between the upper surface of the seal press head 11 and the lower surface of the slide table 8. Crimp and join the upper and lower bands.

12 is the first gripper 7 seal press head; 11 is the second gripper;
The cam 14, which operates the gripper 10, is the camshaft which operates the 14', 13.

Reference numeral 15 denotes a wheel attached to the end of the camshaft 12, and a sliding rod 16 is provided on the wheel 15 so as to be slidable in the inner axial direction with a spring 17.

Reference numeral 18 denotes an actuating arm, which is actuated by the excitation of a solenoid SQL, and which can freely engage with the sliding rod 16.

Reference numeral 19 denotes a drive body for the camshaft 12, which is constantly rotated by a chain (not shown) attached to a chain wheel 20.

Reference numeral 21 designates an engaging recessed portion of the sliding rod 16 provided on the drive body 19.

A pulley 22 is fitted on the outside of the rotating shaft 1' of the feed roller 1 so as to be rotatable with respect to the coaxial shaft 1'.
This pulley 22 is appropriately driven and rotated by a belt 23 that can be wound around it.

22' is a friction plate attached to the outer surface of the pulley 22.

Reference numeral 24 denotes a pulley mounted on the rotary shaft 1' so as to be freely movable in the axial direction, and this pulley 24 is pressed by a spring 25 against the friction plate 22' of the pulley 22 fitted onto the rotary shaft 1'.

26 is a band tightening force adjusting mechanism for adjusting the pressure contact force.

30 is a shaft fixed to the machine frame 31, and a swing arm 29 is swingably attached to this shaft 30.

As shown in FIG. 1, wheels 27 are provided at both ends of the swinging arm 29.
and 28 are rotatably mounted.

The weight of the wheel 28 is heavier than the wheel 27, and the distance between the wheels 28 and the shaft 30 is longer than that between the wheels 27 and 30.

A belt 32 is wound around both wheels 28, 27 and the pulley 24.

Reference numeral 33 denotes a limit switch, which is closed by the swinging arm 29 swinging clockwise around the shaft 30, and this operation is caused by the solenoid SQL associated with the operating arm 18.
is excited to operate the actuating arm 18.

The band tightening force adjustment mechanism 26 will be explained.

In FIGS. 3 to 5, an adjustment cylinder 40 is loosely fitted to the tip of the rotating shaft 1' via balls 41, 41. As shown in FIGS.

The adjustment knob 42 of the adjustment cylinder 40 is provided on the outside of the machine casing 43.

A threaded portion is provided around the outside of the lower end of the adjustment tube 40, and a cap 45 is screwed into the threaded portion 44.

A step 46 is provided below the cap 45, and a step 48 is provided on the presser tube 48 above the spring 25.
A ball bearing 47 is interposed between the

Reference numeral 49 denotes a non-rotating rod attached to the cap 45 with a screw 50', and the tip of the non-rotating rod 49 is attached to the machine casing 4.
3 to the outside, and the arrowed part 49' at the tip of the drawer
This corresponds to the scale section 50 provided in the figure.

In the case shown in FIGS. 6 and 7, the adjustment portion 42 is provided in a machine casing 43' on the opposite side of the machine casing 43.

In this case, a sprocket 52 is provided on the adjustment cylinder 40.

On the other hand, a subshaft 51 is arranged parallel to the interrotation shaft 1', and a chain 53 is passed between the sprocket 52' provided on the subshaft 51 and the sprocket 52.

An adjustment knob 42 is attached to the other end of the subshaft 51 on the outside of the machine casing 43' on the opposite side.

The base rod 54 of the portion 49' indicated by the arrow is screwed 51' into the subshaft 51.

Also, the tip of the rotation prevention rod 49 is connected to the shaft mounting portion 56.5 of the subshaft 51.
This is engaged with an engaging rod 55 that is fixed between 6 and 6.

Its effects will be explained.

A band for packing a load is fed from a band guide trough 6 by pressure contact with a feed roller 1 and a swinging roller 3, and the band goes around the load and its end is inserted into an insertion groove 9.

Then, the microlever M senses this, excites the noid SQL, rotates the camshaft 12, raises the first gripper 7 by the cam 14', and places the vicinity of the end between the slide tip and the puller 8. Grip it to stop the rotation of the camshaft 12.

Next, the swinging roller 4 comes into contact with the return roller 2, thereby tightening the band.

By the way, when the band is tightened to the limit, the load is transmitted to the return roller 2 feed roller 1 pulley 24, and the pulley 24 attempts to stop its rotation.

In this case, until now, the rotational driving force is applied to the rotating shaft by the pulley 24 which is in contact with the pulley 22 via the pulley 22 and its friction plate 22'.
However, the pulley 24 on the rotating shaft 1' is not going to stop, so the pulley 24 and the friction plate 22' slide, and the pulley 22 idles on the shaft 1'.

When the pulley 24 attempts to stop, its belt 32 also attempts to stop its movement, but the wheels 28 and 27 wrapped around this belt 32 continue to rotate as indicated by the arrows due to their inertia.

Therefore, due to its rotation, the wheel 28 rises while rolling within the belt 32 as shown by the arrow a, and the other wheel 27 presses down on the belt 32 as shown by the arrow.

That is, the swing arm 29 swings clockwise about the shaft 30.

This swinging arm 29 is separated from the limit switch 33, and the solenoid S associated with this limit switch 33 is moved away from the limit switch 33.
QL is excited and its actuating arm 18 is actuated.

The actuating arm 18 is lifted up and disengaged from the sliding rod 16, and the sliding rod 16 engages with the engagement recess 21 of the driving body 19. As a result, the driving body 19 rotates through the rolling wheels 15. The cam shaft 12 is rotated and the cam 14 is rotated to cut the lower band on the seal press head 11 and simultaneously press the upper and lower bands together.

To adjust the tightening force of the band, by rotating the adjustment knob 42 on the outside of the machine casing 43 or 43', the cap 45 screwed onto the adjustment tube 40 moves forward or backward, and the presser tube 48 moves forward accordingly. Alternatively, the tension of the spring 25 is adjusted by moving backward and the pulley 22 and the pulley 24
The pressure contact force with is adjusted.

At this time, the rotation of the cap 45 is completely prevented by the rotation prevention rod 49.

6 and 7, the rotation of the adjustment knob 42 is caused by the sprocket 52 chain 53 sprocket 52.
' can be done on the opposite side of the machine casing 43'.

The tightening force can be read from the scale section 50 at the arrow section 49'.

With this invention, the tightening force can be adjusted by rotating the adjustment knob provided on the outside of the machine casing, even while the machine is in operation.
There is no need for complicated operations such as removing the machine casing and stopping and adjusting the machine.

Furthermore, the adjustment knob can be mounted on either side of the machine housing, depending on the operator's convenience.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal sectional side view of the entire device, Fig. 2 is a plan view of its band tightening section, Fig. 3 is a transverse side view of the band tightening force adjustment mechanism, and Fig. 4 is a plan view of its detent device. FIG. 5 is a plan view of the part indicated by the arrow, FIG. 6 is a cross-sectional side view showing another embodiment of the mechanism, and FIG. 7 is a plan view of the part indicated by the arrow. 1'...Rotating shaft, 2...Return roller, 22...Pulley, 24...Pulley, 25...Spring, 40... ...Adjustment tube, 42...Adjustment knob, 43, 43'...
・・Machine box, 45・・Cap, 49・・・・
- Rotating rod, 49'...Arrowed part, 50...
...Scale part, 51...Subshaft, 54...
・Basic.

Claims (1)

[Claims for Utility Model Registration] A rotating shaft 1' that rotates in a direction □ as the return roller 2 rotates.
A pulley 22 is rotatably fitted on the outside of the rotary shaft 1' with a spring 25 through a friction plate 22', and the pulley 22 is attached to a pulley 24 that is movably axially mounted on the rotating shaft 1'. A cap 45 coaxially fitted to the presser cylinder 48 of the spring 25 is fitted via a ball bearing 47, and the cap 45 is screwed together with the adjustment cylinder 40 fitted to the coaxial end, and the adjustment cylinder 40
An adjustment knob 42 is provided on the outside of the machine casing 43, and a locking rod 49 is fixed to the cap 45 so that its end cannot be rotated with respect to the machine casing □c. A band-type packing machine which is movably moved in the axial direction of the rotating shaft 1' and is pulled out of the machine casing 43 and has an arrow part 49' at the end thereof, which corresponds to the scale part 50 provided on the machine casing 43. Band tightening force adjustment device.゛