JPS589848Y2 - Band tightening strength adjustment device for packaging machines - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement of a band tightening strength adjusting device in a packaging machine.

That is, when tightening and binding the band wound around the object to be packed by hand or arch, the amount of tightening (tightening strength) must be changed as appropriate depending on the type of the object to be packed.

Conventionally, this type of tightening strength adjustment had to be done by moving the adjustment screw located at the bottom of the tension lever inside the packaging machine body forward and backward, and by opening the body outer panel, lowering the body position, and inserting one's hand inside the body each time the adjustment was made. did not become.

SUMMARY OF THE INVENTION An object of the present invention is to provide a device that allows delicate adjustment of band tightening strength to be easily performed from outside the packaging machine main body with an extremely simple configuration.

The details of the present invention will be explained below with reference to the illustrated embodiments. 1 is a machine frame of the main body in which a band is wound around the object to be packed, and a cam 2 which rotates after the band is pulled back is supported on a shaft; 3 is an arm. A lever 5 is connected to the machine frame via a spring 4 and has a trochanter provided substantially perpendicularly to the arm 3 and integrally therewith, and is brought into contact with the cam surface of the cam 2.

The arm 3 has its lower end supported on a shaft 6 of the machine frame 1, and further supports the shaft 6.
Then, the annular portion 8 formed integrally with the adjuster 7 is loosely attached to the lower end of the adjuster 7.

A spring 9 whose one end is attached to the lower blade of this annular portion 8 in the side view (Fig. 1)
The receiver 10 is screwed into the other end, and the protruding portion of the engaging member 11 is fitted so as to be able to engage with the stepped portion of the receiver 10 and to be movable within the spring.

The other end of this engaging member 11 is connected to a nut 1 added to the outer wall of the main body.
A threaded portion is provided to be screwed into the housing 13, and the tip thereof is fixed to the housing 13.

Therefore, by rotating the housing 13, the engaging member 11 rotates and moves inside the spring 9 to the stepped portion of the receiver 10 and the engaging member 1.
It moves forward and backward within the range regulated by one stopper 14.

13' It has an old-fashioned cover with a scale.

On the other hand, a guide groove 15 for the band B is provided in the upper part of the arm 3, and in the upper part of the guide groove 15 there is provided a jaw 18 whose upper end is supported on the arm 3 and which is biased in one direction by a spring 16 via a pin 17. When the lower end is facing 1 and the jaw 18, which is in contact with the adjuster 7 to which the rotation of the arm 3 is transmitted via the pin 17, is positioned to the right in FIG. It passes freely between the jaw 18 and the guide groove 15, and when the jaw 18 is rotated in the opposite direction by the adjuster 7, the band B is held between the two.

The drag force of the spring 16 for biasing the jaw 18 is adjusted by the adjuster.
The resistance force of the spring 9 connecting the lower end ring @ 8 of 1 and the engaging member 11 is set to be smaller than the resistance force of the spring 9.

FIG. 2 shows another embodiment of the present invention, which differs from the previous embodiment in that the engaging member 11 is not extended in the form of a rod, and a wire 20 is provided near the stopper portion 14 of the retaining member 11. One end is fixed, and the front end of a tube 22 made of a flexible material is fixed to a mounting plate 21 provided on the machine frame, and the wire 20 is inserted into the tube 22.

Note that a spring 23 is provided around the wire between the stopper 14 and the mounting plate 21, and urges the engaging member 11 in the direction of the spring 9.

The other end of the wire 20 inserted into the tube 22 is connected to a winding mechanism as appropriate.

For example, as shown in FIG. 3, this winding mechanism fixes the tip of the wire 20 to the tip of a rotating rod 26 which has one end pivoted on a plate piece 25 having a T-shaped cross-section. A shaft 27 having a thread is screwed into the internally threaded portion, and a knob 28 is added to the upper end of the shaft 21 that abuts on the plate piece 25.
The rotation causes the rotating rod 26 to vibrate, pushing and pulling the wire pulled downward by the spring 23, and moving the retaining member 11 forward and backward.

Note that 30 is a stopper that engages with the recess of the rotating rod 26.

Next, to explain the operation, the band goes around the inside of the arch by known means, the band is removed from the arch by reversing the feed roller, and the cam 2
When the arm 3 rotates toward the front in FIG. It also rotates.

Along with this, the spring 9, which has one end added to the annular portion 8, also moves to the left in the figure, and this movement is stopped when the engaging member 11 engages with the stepped portion of the receiver 10, and accordingly, the adjuster 7 also moves to the left. Since the pin 17 is stopped, the adjuster 1 presses the pin 17 to the left in the figure, but since the resistance of the spring 16 is smaller than that of the spring 9, the band B is pressed strongly against the bottom of the guide groove 15 in order to rotate the jaw 18 to the left as well. Fix it.

That is, depending on the position of the tip of the engaging member 11, the jaws 18 are able to strongly grip the band.

During this time, the arm 3 continues to rotate due to the action of the cam 2, so the arm 3 rotates through the remaining stroke regulated by the cam 2, and the band B is tightened accordingly, thereby binding the item to be packed. .

In other words, if the engaging member 11 is moved to the right in FIG. 1, the stroke to clamp the band becomes smaller and the tightening width becomes larger.
Conversely, if the engaging member 11 is rotated to the left, the tightening width will be reduced.

As described above, according to the present invention, it is possible to reliably fine-tune the band tightening strength from outside the packaging machine body with a simple configuration, and compared to the conventional adjustment mechanism inside the machine body, it is possible to make fine adjustments to the tightening strength of the band with fewer parts. It is adjustable and greatly contributes to improving operability and packaging efficiency.

Furthermore, by moving the engaging member forward and backward using a wire, it is possible to easily adjust the tightening strength of the band from any position outside the main body, which has excellent practical effects.

[Brief explanation of the drawing]

The figures show an embodiment of the present invention, with Figure 1 being a side view of the main parts and Figure 2 being a side view of the main parts.
3 and 3 show other embodiments, and FIG. 3 is a perspective view showing an example of a wire winding mechanism. 1... Machine frame, 2... Cam, 3...
...Arm, 7...Adjuster, 9...
... Spring, 10 ... Receptacle, 11 ... Engagement member, 12 ... Nut, 13 ... Tightening, 26 ... ...Rotating rod, 27...Axis,
30... Stopper.

Claims (4)

[Scope of utility model registration request] (1) A jaw that is biased in one direction by a spring to move away from the band guide groove is rotatably attached to the upper part of an arm that vibrates with a constant stroke using a cam, has a band guide groove on the upper part, and automatically returns by a spring. The upper end of the adjuster, the lower end of which is supported on the shaft, is attached to a bottle that is supported on the shaft and inserted through the jaw, and one end of the spring is added to the adjuster using the band tightening device of the packaging machine. The ends are fixed to the receiver, and a connecting member that can freely engage with the receiver is movable and adjustable from outside the packaging machine main body, and the drag force of the spring that biases the jaw is applied to the spring attached to the adjuster. A band tightening strength adjusting device for a packaging machine characterized by having a force smaller than the drag force. (2) A receiver is screwed onto the inner edge of the other end of the spring, an engagement member is inserted into the hole of the receiver, and the protrusion of the engagement member is provided so as to be freely engageable with the stepped portion of the receiver. First scope of claims for utility model registration
A band tightening strength adjustment device for a packaging machine as described in 2. (3) Adjustment of the tightening strength of the band to be buttoned on the packaging machine according to claim 1 or 2, wherein the other end of the engaging member is screwed into a nut provided on the outer wall of the packaging machine main body. Device. (4) fixing one end of the wire to the other end of the engaging member;
A band tightening strength adjusting device for a packaging machine according to claim 1 or 2, wherein the other end is appropriately connected to a winding mechanism.