JPH08192809A - Packing machine - Google Patents

Abstract

PURPOSE: To provide a simple and inexpensive packing machine in which a new band is easily fitted to a binding mechanism when a band has broken and another band can be automatically stored in a band pool chamber after fitting of the band. CONSTITUTION: A band guide 30 reversing the sending-out direction of a band B is arranged so as to freely swing, between a pool feed roller 51 fitting a band B and a sending-out and fastening mechanism. The band guide 30 is provided with a passage face of band guide with a seme-circular and recessive shape to turn the band B reversely and conduct it to the sending-out and fastening mechanism S of the band. The band guide is rotated by a pushing force larger than a specified strength of the band B and the band guide is arranged in the pool chamber 40 temporarily storing the band B and kept by two-position regulating spring 32 at the sending-out guide position of band or a hand pool position.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention automatically or semi-automatically wraps a tape-shaped band made of a thermoplastic resin such as polypropylene around an object to be packaged, and welds and bonds the polymerized portion. The present invention relates to a packing machine provided with a processing mechanism, and more particularly to a packing machine in which a band sent from a band reel loaded with a band coil is guided to the processing mechanism and is temporarily stored in a pool chamber.

[0002]

2. Description of the Related Art A conventional band type packing machine of this type is, for example, an automatic type packing machine in which a band guiding arch portion is provided on a box-shaped main body housing having a work table on which an object to be packed is placed. A bundling mechanism for feeding, tightening, joining, cutting and the like of the band is provided below the work table.

This type of packing machine is equipped with a band guide for loading a band and a pool chamber for temporarily storing the band. For example, as disclosed in Japanese Patent Application Laid-Open No. 1-213107, the band supplied to the bundling mechanism of the packing machine is guided from a band reel arranged in the main body housing, and is broken by a new band. When supplying the band coil loaded on the band reel to the bundling mechanism, the band guide is disposed on the lower end of the side wall of the main body housing and extends in the vertical direction of the outer side wall of the main body housing. The tip of the band taken out from the coil is guided and guided to the binding mechanism through the band guide. On the other hand, the pool chamber is arranged on the side wall of the main body housing as a box-shaped pocket having a small width, and the band guide is attached to the pool chamber so as to be movable back and forth. The band guide is withdrawn from the inside of the pool chamber except when the tip of the band is guided, and the pool chamber functions as a temporary storage part of the band in a normal use state such as performing band feed. . Further, the band guide is configured to be movable back and forth in the pool chamber by a rotary drive actuator such as a rotary solenoid.

Further, the present applicant has filed Japanese Patent Application No. 6-165260.
In a packing machine equipped with a band pool chamber and a band guide that can move back and forth from the pool chamber, driving an actuator that selectively presses or separates the band feed roller of the binding mechanism from the back and forth of the band guide. It has been proposed that the force is used to move forward and backward in conjunction with the operation of the actuator.

[0005]

In the conventional packing machine as described above, in order to mount the band guide in the pool chamber so that the band guide can advance and retract, a rotary drive actuator such as a rotary solenoid for moving the band guide, Alternatively, since a band guide moving device that uses the driving force of another actuator is required and an operating member such as the actuator operating switch is also required for moving the band guide, the device is complicated. There is a problem in that the number of components is increased as well as the configuration.

The present invention has been made in view of the above problems, and its object is to cut a band or the like.
A packing machine that makes it easy to newly load a band into the binding mechanism and automatically stores the band temporarily in the band pool chamber after the loading operation and that has a simple and inexpensive structure. Is to provide.

[0007]

[Means for Solving the Problems] To achieve the above object,
A packing machine according to the present invention comprises a band delivery tightening mechanism for delivering and tightening a band, and a band filling / pooling mechanism for supplying the band to the band delivery tightening mechanism.
A band guide for reversing the delivery direction of the band is swingably disposed between a pool feed roller for filling the band and the band delivery tightening mechanism, and the band guide serves to move the band to the band delivery tightening mechanism. It is characterized in that it is provided with a semicircular indented band guide passage surface 30c which is inverted and guided, and is rotated by a pressing force of a predetermined amount or more of the band acting on the band guide passage surface portion, and The band guide is arranged in a pool chamber for temporarily storing the band, and is held at a band delivery guide position or a band pool position by a two-position regulating tension spring 32.

[0008]

[Operation] In the packing machine according to the present invention configured as described above, when the tip of the band is sandwiched between the pool feed roller and the pressing roller and the pool feed roller is driven to rotate, the band moves to the band guide. It is fed to the band guide passage surface, then inverted and guided to the band delivery tightening mechanism, and further transferred to the arch portion by the feed roller and the pinch roller of the band delivery tightening mechanism. At this time, for example, by rotating the pool feed roller at a higher speed than that of the feed roller to cause a difference in transfer speed between the rollers, a band is formed in the band guide passage surface between the feed rollers. Will be in a state of staying a lot. In this state, the pressing force of the band causes an urging force to rotate the band guide around the support shaft. The band guide is held at the band guide position by the urging force of the tension spring at the start of the delivery of the band, but is moved to the band pool position by the urging force of the band. By moving the band guide to the band pool position, the band enters the pool chamber 40 in a meandering state and is temporarily stored.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic front view of the packing machine of this embodiment, and FIG. 2 is a schematic side view. The packing machine 10 of the illustrated example is an automatic type, and a band-guiding arch portion 15 is provided on a box-shaped main body housing 13 having a work table 14 on which the article W to be packed is placed. A band reel 9 loaded with a band coil BC is housed and supported in the main body housing 13. The band reel 9 and the work table 14
And a band feeding and tightening mechanism S for sending out and tightening the band B fed from the band reel 9.
Then, the superposed portion of the front end and the rear end of the band B that has been fed out and tightened is heated by a heater or the like, and the melted portion is pressed by the press and simultaneously cooled and joined, and the rear end of the band B is A banding mechanism composed of a known band edge processing unit (not shown) that is designed to cut the tape.

Casters 19 are attached to the four corners of the bottom surface of the main body housing 13, and the packing machine 10
The whole is easy to move. The band reel 9 includes a drum 91 having left and right flanges 91a and 91b, in which a band coil BC is loaded, and the drum 91.
And a reel shaft 9a for rotatably supporting the reel shaft 9a.
Is equipped with a band reel mounting member 8 whose one end is coupled via a bearing (not shown), and a band reel brake device 7 arranged between the band reel mounting member 8 and the drum 91.

The band reel brake device 7 is a V-pulley-shaped brake pulley which is mounted on the end of the reel shaft 9a on the band reel mounting member 8 side so as to rotate integrally with the drum 91. 92, an endless belt V belt 6 that is rotatably wound around the brake pulley 92,
A swing brake arm 5 that tensions the belt 6 to stop the brake pulley 92 when the brake device 7 is actuated, and leaves the V belt 6 in a floating state when released.
And a biasing spring 4.

Next, a band filling / combining unit including a pool feed roller 51, a pressing roller 52, a band guide 30, a pool chamber 40, and the like arranged at the upper right of FIG.
The pool mechanism L will be described. 3 is an enlarged detailed view of the band filling / pooling mechanism L, and FIG. 4 is a pool feed roller 51, a pressing roller 52, and a band guide 30.
FIG. 5 is a perspective view of FIG.

As shown in FIG. 2, the pool chamber 40 is defined between a left side plate 41 and a right side plate 42 arranged inside the main body housing 13, and a side portion on the side of the band guide 30 in FIG. It has the shape of a box-shaped pocket with an opening. An opening / closing door 17 is joined to the upper part of the left side plate 41 by a hinge 17a, an opening / closing handle 17b is attached to the lower part of the opening / closing door 17, and a magnet 17c fixed to the lower part of the opening / closing handle 17b. It is joined to the left side plate 41 by the magnetic force.

A pool feed motor M is attached to the upper portion of the right side plate 42, and the pool feed roller 51 is rotatably fixed to an output shaft M ₁ of the motor M. The pressing roller 52 is arranged below the pool feed roller 51.
Is an eccentric support shaft 54 having one end rotatably attached to the right side plate 42 and the other end rotatably attached to the pressing roller support plate 53.
It is rotatably supported by. The lower end of the pressing roller support plate 53 is fixed to the right side plate 42 below the pressing roller 52.

The eccentric support shaft 54, as shown in FIG.
The central shaft portion 54a at the central portion for rotatably supporting the pressing roller 52 and the right side plates 42 on both sides of the shaft portion 54a.
And a shaft end portion 54b that is rotatably supported by the pressing roller support plate 53 are integrally configured as an eccentric shaft having different shaft centers. The shaft end portion 54b of the eccentric support shaft 54 on the side of the pressing roller support plate 53 penetrates the pressing roller support plate 53 and extends outward, and the turning lever 54c is fixed to the end portion. A tension coil spring 54d for two-position regulation is arranged between the rotation lever 54c and the pressing roller support plate 53. The idle roller 5 for guiding the band is provided on the left side of the pressing roller 52.
5 is rotatably fixed (see FIG. 3).

The pressing roller 52 is in contact with the pool feed roller 51 at the solid line positions in FIGS. 3 to 5, but the rotating lever 54c is rotated counterclockwise to rotate the rotating lever 54c. When 54c is set to the imaginary line position in FIGS. 3 to 5, since the eccentric support shaft 54 is an eccentric shaft having a central shaft portion 54a and a shaft end portion 54b having different axial centers, the pressing roller 52 is moved to the position shown in FIG. It moves to the virtual line position of 5 and becomes the separated state apart from the pool feed roller 51. 3-5, the tension coil spring 54d moves to the left above the dead center of the tension coil spring 54d, so that the tension coil spring 54d pulls the tension coil spring 54d. The pressing roller 52 is held at the imaginary line position shown in FIGS.

A pair of fixed band guides 60, 61 are arranged above the pool feed roller 51 and the idle roller 55.
1 is fixed to the right side plate 42 by forming a band guide passage 62 between the facing surfaces thereof. The band guide passage 6
The upper end of 2 is a pair of vertical feed opposed band guides 63 of the band delivery tightening mechanism S for sending out and tightening the band B.
The vertical feed opposed band guide 63 is provided above the feed roller 64 and the solenoid type actuator 4 which are rotationally driven by a stepping motor (not shown).
A pinch roller 65 that is pressed against the feed roller 64 by a pressure adjusting means (not shown) composed of 5 and the like is provided (see FIG. 1).

On the other hand, an upper end portion 30a of the band guide 30 is rotatably pivotally attached to a band guide support shaft 31 fixed to the right side plate 42, and a lower half portion 30b of the band feed roller 51 side is a band. Is provided with a large semicircular indented band guide passage surface 30c for inverting and guiding. 3 to 5, the lower end surface of the band guide passage surface 30c is formed at a position corresponding to the contact portion between the pool feed roller 51 and the pressing roller 55, while the band guide passage surface 30c is formed. The upper end surface of 30c has the fixed band guide 60,
The band B formed at a position corresponding to the band guide passage 62 of 61 is guided along the contact portion between the pool feed roller 51 and the pressing roller 55 along the band guide passage surface 30c. It is configured so that it is guided to be inverted and transferred to the band guide passage 62.

Upper and lower ends 32a, 32 of the tension coil spring 32 for two-position regulation are provided on the upper portion of the right side plate 42 and the intermediate portion of the band guide 30 near the upper end portion 30a.
b are locked respectively. The band guide 30 can be moved from the solid line position in FIGS. 3 to 5 to the virtual line position rotated 90 degrees counterclockwise, and the dead position at the locking position (lower end 32b) of the tension coil spring 32 for two-position regulation. By the pulling action of the tension coil spring 32 based on the change beyond the point, the changed position is the band guide position (solid line position) or the band pool position (virtual line position).
Is held.

Next, the operation of the illustrated packaging machine which is an embodiment of the present invention will be described. When a band B is newly charged / supplied from the band coil BC loaded on the band reel 9 to the bundling mechanism including the band filling / pooling mechanism L and the band delivery / tightening mechanism S, the pressing roller 52 is The turning lever 54c is set to the left position shown by imaginary lines in FIGS. 3 to 5, the pressing roller 52 is set in a separated state with a gap as shown in phantom line with respect to the pool feed roller 51, and loaded on the band reel 9. The tip of the band B guided from the band coil BC through the idle roller 55 is inserted into the gap between the rollers 51 and 52, and the rotary lever 54c is moved to the right of the solid lines in FIGS. When rotated to the position, the tension lever spring 54d pulls and urges the rotation lever 54.
c is held at the position to the right of the solid line, and the gap between the two lalers 51 and 52 is narrowed so that the tip end portion of the band B is sandwiched and held by the two lala 51 and 52.
Is completed. At this time, the band guide 30 is held at the band guide position indicated by the solid lines in FIGS.

When the start switch of the control device (not shown) of the packing machine 10 is operated in such a state, the pool feed motor M is started, the pool feed roller 51 rotates counterclockwise, and the band is rotated. The tip portion of B passes through between the pressing roller 52 and the pool feed roller 51 in a pressure contact state by the rotational driving force of the pool feed roller 51, and the band guide 30 has a semicircular indented shape. Passageway 3
0c and is guided upward to move upward, and from the upper end of the band guide passage surface 30c, the fixed band guides 60, 6
1 is moved by being guided by the band guide passage 62 between
Further, it moves in a passage in the vertical feed opposed band guide 63 and is guided to a contact portion between the feed roller 64 and the pinch roller 65 of the band delivery tightening mechanism S.

Since the feed roller 64 of the band feeding / tightening mechanism S is rotationally driven by a stepping motor (not shown) for driving the feed roller 64 at the same time when the start switch of the control device is operated, the band B The leading end of the sheet is nipped by the contact portion between the feed roller 64 and the pinch roller 65, and is rotatably transferred, and goes out from the work table 14 into the arch portion 15 and returns to the packing machine 10 again. The tip of the band B comes into contact with a limit switch of a band end processing unit (not shown) to stop the stepping motor, stop the transfer of the band B, and set it at the packing operation start position.

The rotation peripheral speed of the pool feed roller 51 and the rotation peripheral speed of the feed roller 64 are set to different peripheral speeds, and the rotation peripheral speed of the pool feed roller 51 becomes faster than the rotation peripheral speed of the feed roller 64. As described above, since the rotation speeds of the pool feed motor M and the stepping motor (not shown) for driving the feed roller 64 are adjusted, the band B transfers the pool feed roller 51 and the feed roller 64. As a result of the difference in speed, the band guide 30 is positioned in the semicircular indented band guide passage surface 30c with its length gradually increased. In this state, the rigidity of the inverted U-shaped portion of the band B causes a pressing force to rotate the band guide 30 in the right direction with the band guide support shaft 31 as an axis in FIGS. The band guide 30 is held in the solid line position by the urging force of the tension coil spring 32, but due to the pressing force of the band B to the right,
When gradually moving to the right and the line connecting the upper and lower ends 32a and 32b of the tension coil spring 32 is positioned to the right of the axis of the band guide support shaft 31 (above the dead center),
The tension force of the tension coil spring 32 causes the tension coil spring 32 to move to the band pool position of the imaginary line in FIGS.
By moving the band guide 30 to the band pool position, the band B enters the pool chamber 40 in a meandering state as shown by the phantom line in FIG. 3 and is temporarily stored.

When a predetermined amount of the band B is stored in the pool chamber 40, a part of the stored band B is brought into contact with the limit switch LS as shown in FIG. The drive is stopped, the rotation of the pool feed roller 51 is stopped, and the pool chamber 4 of the band B from the band reel 9 is stopped.
Stop intrusion into 0.

The packing work is carried out in such a state, but when the packing work progresses and the band B stored in the pool chamber 40 is sequentially fed out and becomes less than a predetermined amount, the limit switch is activated. The pool feed motor 51 is actuated to drive the pool feed motor M again, and the pool feed roller 51 causes the band B to enter from the band reel 9 into the pool chamber 40 for storage.

When the band coil BC loaded on the band reel 9 is used up and disappears, and the band B is newly charged and supplied to the bundling mechanism including the band filling / pooling mechanism L and the band feeding / tightening mechanism S. First, the opening / closing door 17 is opened and the band guide 30 is rotated to the band guide position shown by the solid lines in FIGS. Although one embodiment of the present invention has been described above, the present invention is not limited to the above embodiment, and various changes in design can be made without departing from the spirit of the present invention described in the claims. Is something that can be done.

[0027]

As can be understood from the above description, according to the present invention, the band guide 30 is swingably supported via the two-position regulating means, and the peripheral speed difference between the pool feed roller 51 and the feed roller 64 is increased. Band B to transfer using
Since the pressing force is applied to the front band guide 30 to automatically rotate the band guide 30 from the band guide position to the band pool position, the band B can be automatically supplied to the pool chamber 40.

Since the band B can be automatically supplied to the pool chamber 40 only by providing the swingable band guide 30, the number of parts can be reduced and a band guide moving means such as a solenoid is not required. . Further, the band guide 30 can be pivotally moved to the two positions manually.

[Brief description of drawings]

FIG. 1 is a schematic front view with a front side wall removed to show an internal configuration of a packaging machine according to an embodiment of the present invention.

FIG. 2 is a partially cutaway side view schematically showing the side wall of the packing machine shown in FIG.

FIG. 3 is an enlarged view of a band filling / pooling mechanism of the packing machine shown in FIG.

4 is an explanatory view of a main part of the band filling / pooling mechanism of FIG.

5 is a perspective view of an essential part of the band filling / pooling mechanism of FIG.

[Explanation of symbols]

 B ... Band L ... Band filling / pooling mechanism S ... Band feeding tightening mechanism 10 ... Packing machine 30 ... Band guide 30c ... Band guide passage surface 32 ... Tension spring 40 ... Pool chamber 51 ... Pool feed roller

Claims (5)

[Claims] 1. A packing machine 10 comprising: a band delivery / tightening mechanism S for delivering and tightening a band B; and a band filling / pooling mechanism L for supplying the band B to the band delivery / tightening mechanism S. A packing machine in which a band guide 30 for reversing the sending direction of the band B is swingably disposed between the pool feed roller 51 for filling the band and the band sending tightening mechanism S. 2. The band guide 30 includes the band B.
2. The packing machine according to claim 1, further comprising: a semicircular dent-shaped band guide passage surface 30c which guides and guides to the band delivery tightening mechanism S. 3. The packing machine according to claim 1, wherein the band guide 30 is rotated by a pressing force of the band B acting on the band guide passage surface 30c of a predetermined amount or more. 4. The band guide 30 includes the band B.
The packing machine according to any one of claims 1 to 3, wherein the packing machine is arranged in a pool chamber 40 that temporarily stores the packing. 5. The packing machine according to claim 1, wherein the band guide 30 is held at the band delivery guide position or the band pool position by a two-position restricted tension spring 32.