JPH08192813A - Band type bundling machine - Google Patents

Abstract

PURPOSE: To always bundle objectives with an appropriate force, by arranging first and second drive rollers with a horizontal distance and pushing a fixed roller to the first drive roller with a strong force from the lower face thereof and also pushing a movable roller to the second roller with a weak force from the lower face thereof. CONSTITUTION: A band (a) paid out of a roll is put between a first drive roller 11 and a fixed roller 17 by the ordinary rotation of a reversible motor 8 for a feeding and pulling-back device 7 and lifted, and fed in the groove 29 of a fixed guide member 28 by the ordinary rotation of the second drive roller 14 cooperating with the movable roller 18. In this state, an objective (e) is laid and the device is started. The solenoid 38 is excited and the plunger 39 is retracted and the left end of movable guide member 30 is pushed up through the lever 33 and the front end of band (a) pressed and fixed. Thereafter, the band (a) is pulled back by the reverse rotation of motor 8 and when the hoisted height of the tension roller 25 reaches a preset value, the motor 8 ceases to run.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is directed to feeding a band along a ring-shaped guide, inserting a bundled object into the band, fixing the front end of the band and pulling back the rear end side of the band. Regarding a band type bundling machine that allows the band to be pulled out from the opening on the inner peripheral side of the guide to hold the bundling object, especially the band is smoothly fed out and the pullback force at the final stage The present invention relates to a band type bundling machine for adjusting an object to be bunched with a suitable force.

[0002]

2. Description of the Related Art In a conventional band type bundling machine, a band is sandwiched by a pair of rollers pressed by a constant force, the band is fed into a guide by the forward rotation of the rollers, and the band is pulled back by the reverse rotation of the rollers. Since the objects to be bundled are bundled together, the force is too strong at the time of feeding to cause the band to meander in the guide, and the pulling force may be too large or too small at the time of pulling back.

[0003]

The problem to be solved by the present invention is that, in the conventional band type bundling machine, the feeding of the band is not carried out smoothly, and the pulling force at the final stage of pulling back is properly adjusted. It cannot be adjusted.

[0004]

As a means for solving the above-mentioned problems, the invention of claim 1 comprises a first drive roller and a first drive roller which are rotationally driven in the forward and reverse directions at the same peripheral speed by driving a motor. The two drive rollers are horizontally spaced from each other, the fixed roller is pressed against the first drive roller from the lower surface side with a strong force, and the movable roller is pressed against the second drive roller from the lower surface side with a weak biasing force. In addition, a tension roller urged downward is arranged between the fixed roller and the movable roller, and the belt passes between the first drive roller and the fixed roller and rotates on the lower surface side of the tension roller. It is configured so that it bends and is sent to the guide after passing between the second drive roller and the movable roller, and the rising distance of the tension roller has reached an arbitrary set value. The invention of claim 2 is characterized in that, in the invention of claim 1, the transparent portion is provided on one of the support of the tension roller and the fixed frame, and the transparent portion is provided on the other. Corresponding photoelectric elements are provided respectively, and the motor is stopped by the detection signal of the photoelectric element.

[0005]

According to the invention of claim 1, the movable roller is pressed against the second drive roller on the guide side by a weak urging force and the belt is sandwiched between the two rollers. Is fed into the guide with a weak force, and is smoothly fed into the guide, and the fixed roller is pressed against the first drive roller with a strong force, and the belt sandwiched between them moves around the tension roller. Since it is hung on the roller, the movable roller is separated from the second drive roller in the final stage of pulling back, so that the belt is tightened with a strong force by the first drive roller and the fixed roller, and the bundled object is firmly bundled. Moreover, the tension force of the belt lifts the tension roller against the urging force, and the rise distance reaches an arbitrary set value. Since the motor is stopped when it starts, the final tightening force of the belt can be appropriately determined, and it is possible to prevent the tightening force from becoming too large or too small. Claim 2
In the invention of (1), the support of the tension roller is lifted, and the motor is stopped by the detection signal generated when the photoelectric element corresponds to the light transmitting portion. The tightening force of can be set to an appropriate value.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the accompanying drawings.

In FIG. 1, reference numeral 1 denotes a guide bent in the shape of a rectangular ring whose corners are curved except for the lower cutout portion 2, and has a U-shaped cross section as shown in FIG. The guide member 3 is filled inside, and the opening / closing plates 4 are attached to both sides of the inner circumference of the straight line portion by being bent inward by the hinges 5 with springs, and between the guide member 3 and the opening / closing plate 4. A narrow gap through which the band a made of hot-melt resin passes is configured, and the cutout portion 2 is provided with a movable plate 6 described later.

The band a fed from the roll b is wound around the fixed roller c and the dancer roller d and supplied to the feeding / pulling-back device 7.

The feeding / pulling-back device 7 is shown in detail in FIGS. 3 and 4, in which a first timing pulley 10 and a first driving roller 11 are fixed to an output shaft 9 of a reversible motor 8 with a brake. The first timing pulley 10 is attached to the shaft 12 that is rotatably supported with a space on the left side.
A second timing pulley 13 having the same diameter as that of the first driving roller 11 and a second driving roller 14 having the same diameter as that of the first driving roller 11 are fixed, and a timing belt 16 is wound around these pulleys 10 and 13 and the tension pulley 15. The first driving roller 11 and the second driving roller 14 are driven to rotate in the same direction at the same peripheral speed.

The first drive roller 11 includes a fixed roller 1
7 is pressed by a strong force from the lower side, and an arm 19 that swings around a shaft 20 is attached to the second drive roller 14.
The movable roller 18 pivotally supported at the tip of the tension spring 2
It is pressed from below with a weak force due to the elasticity of 1.

Below the fixed roller 17 and the movable roller 18, a tension roller 25 is rotatably supported by a support body 23 which is urged downward by a tension spring 24 and moved up and down along a vertical guide member 22. On the right side of the support member 23, several light transmitting holes 26 are vertically arranged at regular intervals, and a photoelectric element 27 composed of a pair of light emitting element and light receiving element facing each other on both sides of the light transmitting hole 26. Is fixed to a fixed frame (not shown).

In the feeding / pulling-back device 7 having such a structure, the belt a rising from the lower dancer roller d is sandwiched between the first drive roller 11 and the fixed roller 17, and the lower side of the tension roller 25 is bent. From the second
It is sandwiched between the drive roller 14 and the movable roller 18, and is fed in the direction of the guide 1 by the rotation of the reversible motor 8 in the forward and reverse directions, and is pulled back in the reverse direction.

On the left side of the second drive roller 14, an elongated fixed guide member 28 having a groove 29 is fixed obliquely upward to the fixed frame, and an opening 40 is formed in the lower surface of the left end thereof.

A movable guide member 30, which has a groove 31 on the left side of the fixed guide member 28 and is bent substantially horizontally so that the left end portion thereof corresponds to the lower surface of the movable plate 6, can be freely swung by a shaft 32. The left end of the lever 33, which is supported and swingably supported by the shaft 34, is connected to the movable guide member 30 via a link 35, and a solenoid 38 is provided in a long hole 36 formed at the right end of the lever 33. A projecting pin 37 is fitted into the plunger 39 of the movable guide member 30, the plunger 39 is projected when the solenoid 38 is not excited, and the lever 33 is moved downward to the left so that the left end portion of the movable guide member 30 is moved downward. As shown in FIG. 1, when a gap is created between the movable plate 6 and the lower surface of the movable plate 6 and the solenoid 38 is excited, the plunger 39 is attracted and the lever 33 moves to the left, and the movable guide portion is moved. Left portion of the 30 is adapted to be pressed against the movable plate 6, an opening 47 is formed in the lower surface of the left end portion of the movable guide member 30.

Blacket 41 fixed to a fixed frame
A deceleration motor 42 is attached to the output shaft 43, and a first cam 44, a second cam 45, and a third cam 46 are fixed to the output shaft 43 thereof at intervals.

On the right side of the horizontal portion of the bracket 41, the upper end of the first pressing member 4 corresponds to the opening 40 of the fixed guide member 28.
A cam follower 49, which is movably supported up and down and is axially supported at the lower end, is engaged with the third cam 46.
An elevating body 50 is supported on the left side of 1 so as to be vertically movable, and a cam follower 51 axially supported at the lower end of the elevating body 50 is engaged with the first cam 44. A movable guide member is provided at the upper end of the elevating body 50. The cutter 52 which is directed to the opening 47 of the 30 is fixed, and the attachment body 54 in which the heater 53 is attached to the upper end surface and the second pressing member 55 are vertically movable, and
The springs 56 and 57 are urged upward by the elastic force of the springs 57 and are supported.

The movable plate 6 described above, as shown in FIG.
A shaft 59 is connected to a lever 56. The lever 56 has a cam follower 58 supported by a shaft 57 and rotatably supported at the lower end engaged with the second cam 45.
When the lever 5 rotates, the lever 56 swings to move to a position shown by a solid line in FIG. 2 where it is fitted into the notch 2 of the guide 1 and a retracted position shown by a chain line in the figure.

Next, the operation of this embodiment will be described.

Fixed roller c fed from roll b
The band a stretched over the dancer roller d and the band reversing motor 8 of the feeding / pulling-back device 7 are rotated by the forward rotation of the band a.
It is sandwiched between the drive roller 11 and the fixed roller 17 and pulled up, and the fixed roller 17 is rotated and lowered, and the tension roller 25 is rotated and sandwiched between the second drive roller 14 and the movable roller 18, By the normal rotation of the second driving roller 14 having the same peripheral speed as the driving roller 11, the second driving roller 14 is fed into the groove 29 of the fixed guide member 28, and further passes through the groove 31 of the movable guide member 30 from the notch 2 to the guide 1. The reversible motor 8 is stopped when the tip is detected by a micro switch (not shown) when it is fed into the gap between the guide member 3 and the opening / closing plate 4, passes around the lower surface of the movable plate 6 around the guide 1, and the reversible motor 8 stops. Will stop feeding and become ready.

When the band a travels in the guide 1, it is pushed by the movable roller 18 against the second drive roller 14 with a weak force and fed, so that the band a meanders in the guide 1. Without a problem, smooth feeding is performed.

Next, as shown in FIG.
When it is inserted into the ring 1 and a start switch (not shown) is pressed, the solenoid 38 is excited and the plunger 39 is pulled in, the lever 33 rotates clockwise and the left end of the movable guide member 30 is pushed up, and the band a of the band a is pulled up. After the portion slightly returned from the tip is pressed and fixed to the right half of the lower surface of the movable plate 6, the reversible motor 8 starts reverse rotation and the belt a starts to be pulled back.

Then, the belt a is pulled inside the guide 1, the opening / closing plate 4 opens outward against the elastic force of the spring attached to the hinge 5, comes out of the opening, and is wound around the object to be bundled e.

When the reversible motor 8 continues to rotate in the reverse direction,
The tension of the belt a increases and the gripping force of the bundled object e gradually increases, and the movable roller 18 rotates downward and separates from the second drive roller 14 as shown by the chain line in FIG. a is the first drive roller 11 and the fixed roller 1
7, it is nipped and pulled back by a strong force, and as the tension of the belt a increases, the tension roller 25 rises while stretching the tension spring 24 together with the support body 23, as shown in FIG.

Then, the photoelectric element 27 counts the number of passing through the light transmitting holes 26 of the support 23. When the number reaches a preset number, the reversible motor 8 is stopped and the brake is applied by the detection signal, and the belt a Since the tightening of the bundled object e by pulling back is completed, the tightening force of the bundled object e can be set to an appropriate value by appropriately determining the set number described above.

Subsequently, the rotation of the reduction motor 42 raises the first pressing member 48 engaged with the third cam 46, and the tip of the first pressing member 48 enters the groove 29 of the fixed guide member 28 through the opening 40.
After the band a is pressed against the fixed guide member 28 to make it immovable, the elevating body 50 engaging with the first cam 44 rises, and first, as shown in FIG. 5, the second pressing member 55 overlaps the band a. The portion is pressed against the movable plate 6, and then, as shown in FIG. 6, the attachment body 54 is raised and the heater 53 is pressed against the overlapping portion of the band a to be welded by heating, and finally the cutter 52 is raised and moved. Opening 4 of guide member 30
7 enters the groove 31, and the band a is pressed against the movable guide member 30 and cut.

As a result, the bundle of objects to be bundled e is completed, so that the movable plate 6 is retracted by the rotation of the lever 56 that engages with the second cam 45, as shown by the chain line in FIG. The bundled object e can be taken out, and the brake of the reversible motor 8 is released and the tension of the band a is weakened during this time. The elastic force of 21 causes it to move back to the position where it is pressed against the second drive roller 14.

By driving the reduction motor 42,
As the lifting body 50 and the first pressing member 48 are lowered, the movable plate 6 is returned to the position shown by the solid line in FIG. 2, and the solenoid 38 is de-excited, and the tip of the movable guide member 30 is lowered to move the movable plate 6. A gap is created between the plate 6 and the original state.

In order to determine the maximum tension of the band a,
In addition to the above-described embodiment, various means for detecting the moving distance of the support body 23 such as counting the protrusions arranged vertically on the support body 23 with a limit switch or attaching an electromagnetic scale to the support body 23 are adopted. be able to.

[Brief description of drawings]

FIG. 1 is a partially cutaway front view showing the overall structure of an embodiment of the present invention.

FIG. 2 is a perspective view showing an operation of a guide 1 and a movable plate 6.

FIG. 3 is a partially cutaway front view of a main part of the band a in a state where pulling back is started.

FIG. 4 is a partially cutaway front view of a main part of the band a in which pulling back is completed.

FIG. 5 is an enlarged cross-sectional view of a state in which an overlapping portion of the band a is pressed by a second pressing member 55.

FIG. 6 is an enlarged cross-sectional view showing a state where the overlapping portion of the band a is welded by the heater 53.

[Explanation of symbols]

1: Guide 8: Reversible motor 11: First drive roller 14: Second drive roller 17: Fixed roller 1
8: Movable roller 25: Tension roller 26:
Translucent hole 27: Photoelectric element 53: Heater

Claims (2)

[Claims] 1. A band is sent out along a ring-shaped guide to insert a bundled object into the band, the front end of the band is fixed, and the rear end side of the band is pulled back, whereby the band is separated. In a band type bundling machine which is designed to bunch the object to be bunched out by escaping from the opening on the inner peripheral side of the guide, the first bundling machine is driven to rotate in the forward and reverse directions at the same peripheral speed by driving a motor. A driving roller and a second driving roller are arranged in a horizontal direction with a space therebetween, a fixed roller is pressed against the first driving roller from the lower surface side with a strong force, and a movable roller is mounted on the second driving roller on the lower surface side. While being pressed by a weak urging force from the above, a tension roller urged downward is disposed between the fixed roller and the movable roller, and the belt is the first drive roller. Passing between the fixed rollers,
The lower surface of the tension roller is turned to pass through the space between the second drive roller and the movable roller before being fed to the guide, and the rising distance of the tension roller reaches an arbitrary set value. A band type bundling machine characterized in that the motor is stopped at times. 2. A light-transmitting portion is provided on one of the support of the tension roller and the fixed frame, and a photoelectric element corresponding to the light-transmitting portion is provided on the other, and the motor is stopped by a detection signal of the photoelectric element. The band-type bundling machine according to claim 1, wherein the band-type bundling machine is configured to have the above-mentioned structure.