JPH0826208A - Packaging machine - Google Patents

Abstract

PURPOSE:To eliminate an actuator which is exclusively used for the opening/ closing operation of a band passage by providing a band passage-opening/closing means to open or close a band passage using the driving force of an actuator which selectively makes a pair of rollers for tying mechanism band feeding, which pinch and send out a band, approach or separate. CONSTITUTION:A packaging machine is equipped with a pool chamber 40 wherein a band B is temporarily reserved at the time of release when a band passage is not formed by a band guide 50 which is opened or closed by a band passage opening/closing means 60. For such a packaging machine, the band passage opening/closing means 60 is constituted by providing a rocking lever 75 of which the base end part 75a is axially attached to a top plate 40a of the pool chamber 40. Then, the actuating rod of a solenoid type actuator 80 for the feeding of a tying mechanism is connected to a rocking end part 75b of the rocking lever 75. By this method, a linear movement in the vertical direction of the actuator 80 is converted to a rotational movement of the rocking lever 75, and a holding roller 76 for feeding is made to approach or separate from a feed roller 78.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a band processing mechanism which automatically winds a tape-shaped band made of a thermoplastic resin such as polypropylene around an article to be packed, and welds the polymerized portion to bind the band. Involved in the provided packing machine,
In particular, the present invention relates to a packing machine in which a band delivered from a reel unit loaded with a band coil is temporarily stored in a pool chamber and guided to the band processing mechanism.

[0002]

2. Description of the Related Art A conventional band type packing machine has a band on a box-shaped main body housing having a work table on which an article to be packed is placed, as seen in Japanese Patent Laid-Open No. 1-213107. An arch portion for guiding is provided, and a binding mechanism for feeding, tightening, joining, cutting and the like of the band is arranged below the work table.

In such a packing machine, the reel unit itself is fixed in the main body housing, and when the band is broken, only the band coil is taken in and out and replaced. The tip of the band taken out from the newly loaded band coil is set on the lower end of the side wall of the main body housing via a reel or the like, and is arranged vertically on the outer side wall of the main body housing. The band guide is guided to the bundling mechanism to facilitate the loading operation of the band accompanying the replacement of the band coil. Furthermore, a pool chamber consisting of a box-shaped pocket having a small width is provided on the side wall of the main body housing, and the band guide is attached to the pool chamber so that the band guide can advance and retreat. The band to be withdrawn from the pool chamber and sent to the bundling mechanism is temporarily stored.

[0004]

In the conventional packing machine as described above, the band guide can be moved back and forth from the pool chamber by using a rotary type drive actuator such as a rotary solenoid provided exclusively for moving the band guide. The band passage is opened and closed by rotating the band passage to form a band passage or temporarily store the band in the pool chamber. Further, there is also practiced one in which the entire band is folded by a complicated mechanism to form a band passage during the band loading operation in the pool chamber.

Since such a conventional packing machine is provided with a dedicated drive solenoid for moving the band guide, it has a large number of parts and has a complicated structure as a whole. There was a problem that the band did not flow smoothly in the band passage. The present invention has been made in view of such problems, and its purpose is to:
The opening / closing operation of the band passage can be smoothly performed, the band can smoothly pass through the band passage, and the entire structure can be configured easily and inexpensively, and energy saving is achieved. It is also possible to provide a packing machine.

[0006]

In order to achieve the above object, the packing machine according to the present invention basically has a band passage for guiding a band wound around the object to be packed to a binding mechanism. A band guide that can be formed, a pool chamber that temporarily stores the band when the band passage is not formed, and a band passage opening and closing unit that moves the band guide forward and backward from the pool chamber to control the opening and closing of the band passage. And a band passage opening / closing means, wherein the band passage opening / closing means uses the driving force of an actuator that selectively presses or separates the band feeding rollers of a pair of binding mechanisms that feeds while sandwiching the band in the gap. The feature is that the passage is opened and closed.

As a more preferable specific example of the packing machine of the present invention, the band passage opening / closing means interlocks the operation of the actuator with the band guide at a closed position where the band passage is formed, or the band guide. From the above, a band passage opening / closing operation lever for opening / closing the band passage by selectively moving in parallel to an open position for releasing the band into the pool chamber can be cited. The guide is always biased in the direction of opening the band passage,
The band passage opening / closing operation lever can be locked at the closed position to form the band passage, and the lock of the band passage opening / closing operation lever is automatically released in conjunction with the operation of the actuator to automatically release the band passage. A preferable example is one that is provided with a lock pin that opens the door and releases the band into the pool chamber.

[0008]

[Operation] In the packing machine according to the present invention configured as described above, the band passage opening / closing operation lever is operated to lock the band guide at the closed position with the lock pin to form the band passage, and thereafter, By the operation of the actuator, the lock of the band passage opening / closing operation lever by the lock pin is released, the band guide is returned to the open position, and the band passage is opened into the pool chamber,
The band separates from the band passage and enters the pool chamber to be stored.

As described above, since the opening / closing operation of the band passage is performed by utilizing the operating force of the band feed actuator of the binding mechanism, it is not necessary to provide an actuator dedicated to the opening / closing operation of the band passage, and therefore, It can be configured easily and inexpensively.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 schematically shows the whole of one embodiment of a packing machine 1 according to the present invention.
A band-shaped arch 5 for guiding a band is provided on a box-shaped main body housing 3 having a work table 4 on which the reel coil 10 is loaded with a reel coil 10. A reel accommodating unit R is provided, and a binding mechanism (not shown) for feeding, tightening, joining, cutting and the like of the band B fed from the reel unit 10 between the reel accommodating unit R and the work table 4. Are arranged.

Wheels 9 are attached to the four corners of the bottom surface of the main body housing 3 so that the entire packing machine 10 can move, and an opening / closing door 7 is provided on the right side surface of the main body housing 3. It is hinged.
2 to 4, the reel unit 10 includes a drum 11 having left and right flanges 11a and 11b on which band coils BC are loaded, and a reel shaft rotatably supporting the drum 11. 14, a reel support 12 having a plate shape as a whole in which one end of the reel shaft 14 is coupled via a bearing 13, and a band brake 30 arranged between the reel support 12 and the drum 11. , Are provided.

A wheel support plate 15 is attached to the lower end corner of the rear end (left end in FIG. 2) of the reel support 12 so as to protrude downward, and at the upper end corner of the rear end. A pair of sandwiching guide plates 20A sandwiching an upper rail 19, which will be described later, is fixed so as to project upward. The wheel support plate 15 has a pair of upper and lower rolling wheels 21 and 22 which are inscribed in and out of contact with a lower rail 17 which will be described later and are pivotally supported.

Further, on the upper side surface of the reel support 12 on the drum 11 side, as can be seen clearly with reference to FIG. A guide rod 25 for guiding to a band pulling mechanism 28 provided near the bottom portion on the flange 11a side and a support member 24 for supporting the guide rollers 26, 27 are attached in the lateral direction, and the reel support body 12 has An engagement rail 36 having a U-shaped cross section, on which a later-described engagement pressing member 18 is slidably contacted, is fixed to the main body housing 3 in the left-right direction in FIG. .

The band brake 30 is well known in itself, and is fitted onto the end of the reel shaft 14 on the reel support 12 side so as to rotate integrally with the drum 11. The brake wheel 31 and a pin shaft 34 fixed to the reel support 12 are swingably supported, and a biasing rod 38 is supported by a coil spring 35.
2 is always urged in the counterclockwise direction in FIG. 2 via an operating rod 33, which is in the shape of a "side" in a side view (FIG. 2) and an inverted L shape in a front view (FIG. 4), One end of the operation rod 33 is connected to the rear end of the operation rod 33, the other end is fixed to the reel support 12, and an intermediate portion of the operation rod 33 is partially wound around the outer circumference of the brake wheel 31 and pressed against it. When the band B is paid out, the operating rod 33 is pushed down by the band B when the band B is paid out, whereby the operating rod 3 is pushed down.
2 is swung in the clockwise direction in FIG. 2 against the urging force of the coil spring 35, the brake band 32 is loosened at this time and the drum 11 rotates, and otherwise the band 11 is rotated. The brake 30 stops the rotation of the drum 11.

A guide means for sliding the reel unit 10 horizontally to and from the right side surface of the main body housing 3 where the opening / closing door 7 is provided at one end of the reel housing R. The lower rail 17, the upper rail 19, and the engagement pressing member 18 that configure the above are provided. The lower rail 17 has a U-shaped cross-section in which the rolling wheels 21 and 22 attached to the lower portion of the reel support 12 of the reel unit 10 are in and out of contact with each other. In other words, it is laid along the installation direction of the arch portion 5 (left and right direction in FIGS. 2 and 4). The upper rail 19 has an inverted L-shaped cross section and is sandwiched by a pair of sandwiching guide plates 20A attached to the upper left corner (FIGS. 2 and 4) of the reel support 12 of the reel unit 10. And is laid directly above the lower rail 17 in parallel therewith. Further, a pair of holding guide plates 20B capable of holding the upper end portion of the reel support 12 is fixed to the right end portion (FIGS. 2 and 4) of the upper rail 19.

On the other hand, the engagement pressing member 18 is an upper portion near the opening (door 7) of the reel housing R, that is,
Rolling wheel 2 arranged at the lower left corner of the reel support 12
1, 22 are fixed on a diagonal line thereof, and are inserted into an engaging rail 36 having a U-shaped cross section which is fixed to an upper side surface of the reel supporting body 12, and the reel unit 10 is stored in the reel storing portion R. In this state, it is regulated so as not to swing in the vertical direction, and also serves as a guide when the reel unit 10 is taken in and out.

The right end of the lower rail 17 (FIG. 2)
In order to prevent the above-mentioned rolling wheels 21 and 22 from coming out of the rail 17, a stopper pin 37 is laterally provided. In the packing machine 10 of this embodiment configured as described above,
When replacing the band coil BC, the reel unit 10
The whole is guided by a lower rail 17, an upper rail 19 and a shake suppressing member 18 provided in the reel storage section R,
As shown by the alternate long and short dash line in FIGS. 2 and 4, the main body housing 3 is horizontally pulled out from the right side surface. Then, with the reel unit 10 pulled out, the wing nut 16 screwed to the outer end of the reel shaft 14 and the left flange portion 11a of the drum 11 are removed and the band coil BC is loaded, and the wing nut is again loaded. 16 and drum 11
Attached to the left flange portion 11a of the band B, and the leading end of the band B is routed to the pull-out mechanism 28, and then the entire reel unit 10 is pulled out into the main body housing 3 in the opposite manner to the pull-out mechanism. While being guided by the member 18, it is pushed horizontally and stored.

Next, the structure around the band passage 57 composed of the band guide 50 and the pool chamber 40 and the band passage opening / closing means 60 will be described. FIG. 5 is a schematic front view of the band passage opening / closing means according to the present embodiment with an external door open, and FIG. 6 is a perspective view of the VI-VI arrow section of FIG. 7 is a sectional view taken along the line VII-VII of FIG. 5, and FIG. 8 is a sectional view taken along the line VIII-VIII of FIG.

The band passage 57 and the pool chamber 40 in the illustrated example are basically of the same construction as conventional ones. Outside the front side of the band coil BC arranged in the main body housing 3, as shown in FIGS. 3 and 4, an outer wall 41 defining the reel housing R is provided. On the outside of the outer wall 41, an opening / closing door 42 hinged to the upper part is provided, and the outer wall 4
A box-shaped pocket-shaped pool chamber 40 formed by opening a right side portion (FIGS. 5 and 6) by a chamber outer wall 43 parallel to 1 is also provided. Although not shown in the drawing, an opening / closing door is appropriately provided outside the pool chamber 40 by hinge connection.

Adjacent to the opening formed at the right end portion of the pool chamber 40, a band guide 50 made of a plate material having a substantially L-shaped cross section opens and closes the opening.
It is provided so as to be movable in parallel in the vertical direction with respect to the outer wall 41 by the operation of the band passage opening / closing means 60 described later. As shown in FIG. 6, the band guide 50 includes a guide portion 52 having a concave groove portion 52a facing the outer wall 41 and a direction perpendicular to the guide portion 52 (parallel to the outer wall 41). And a bending portion 51 that is bent obliquely downward to the right in a front view (FIG. 5). The band passage 57 is formed by the gap between the groove 52a and the outer wall 41.
Are formed.

As can be seen from FIG. 7, the band guide 50 is loosely fitted to the bolts 54, 54, ...
Coil spring 5 fitted onto 4, 54, ...
5, 55, ... are always urged outward (to the left in FIG. 7), that is, in a direction to open the band passage 57. Further, a shield plate 58 of an L-shaped angle member is attached to the outer wall 41 to prevent the band B from coming off when the width of the band B is relatively large.

At a position near the lower end of the bent portion 51 of the band guide 50, a pressing roller 72 is arranged so as to be constantly in pressure contact with the pool feed roller 71 and to be separated from each other as necessary. There is. That is,
By pushing down the lever 73 to widen the space between the pressing roller 72 and the pool feed roller 71 and sandwiching the tip of the band B from the band pulling mechanism 28, the pool feed roller 71 is operated. , The band B can be accurately delivered to the binding mechanism.

The band passage opening / closing means 60 is a bearing fixedly supported by a support member 61 having a spacer fixed to the outer wall 41 of the main body housing 3, as can be seen by referring to FIGS. 5 and 8. Portion 62 and the bearing portion 62
Is swingably supported, and the other end 63b pushes the outer surface of the mounting portion 53 of the band guide 50 by pushing one end 63a by hand, and the urging force of the coil springs 55 ,. Band passage opening / closing operation lever for moving the band guide 50 from the separated position (open position shown by solid line in FIG. 8) to the close position (closed position shown by phantom line in FIG. 8) with respect to the outer wall 41 against 63 and a lock having a built-in compression spring 64 for fitting the band passage opening / closing operation lever 63 into the insertion hole 63c provided on the other end 63b side to lock the band passage opening / closing operation lever 63 at the proximity position. When the pin 65 and the band passage opening / closing operation lever 63 at the end of the outer wall 41 change from the proximity position to the separation position, this is detected to detect the pool feed roller. The limit switch 66 for changing the operation mode of the motor (not shown) for driving the motor 1 and the lock pin 65 for unlocking the lock pin 65 are attached to the upper end of the lock pin 65 and the front view (FIG. 5) is an upside down L. The lower end portion of the adjusting plate 68 fixed to the character-shaped lock pin receiving portion 67 is loosely inserted and attached, and the upper end portion is loosely attached to a swing end portion 75b of a swing lever 75 described later. And a connecting rod 69 which is mounted and is moved up and down by the vertical movement of the swing lever 75.

A base end portion 75a of the swing lever 75 is pivotally supported by a bearing portion 77 fixed on the top plate 40a of the pool chamber 40, and a swing end portion 75b of the swing lever 75 is supported by the swing end portion 75b. An operating rod of a feed solenoid type actuator 80 of a binding mechanism (not shown) is connected via a pin or the like. In this way, the vertical motion of the actuating rod in the vertical direction is converted into a rotational motion centered on the base end portion 75a, whereby the feed pressing member fixed near the base end portion 75a of the swing lever 75 is fixed. The roller 76 is selectively brought into pressure contact with or separated from the feed roller 78 (see FIG. 5).

By doing so, the lever 73 is pushed down as shown by the phantom line in FIG. 5 to lower the pressing roller 72, and the gap between the pressing roller 72 and the pool feed roller 71 is reduced. Band B pulled out from the pull-out mechanism 28 in the expanded state
When the tip portion of the lever is inserted into the gap between the rollers and then the lever 73 is released, the lever 73 is returned to the position shown by the solid line in FIG. The setting of the narrow band B is completed.

On the other hand, the band passage opening / closing operation lever 63
By pulling the handle portion 63a provided at the end of the band in the front direction of FIG. 5 (upward in FIG. 8), the band passage opening / closing operation lever 63 is tilted to the position shown by the phantom line in FIG. Thereby, the band guide 50
8 approaches the outer wall 41 to a position indicated by an imaginary line in FIG. 8, and the band passage 57 is formed between the recessed groove portion 52a and the outer wall 41. In this state, the limit switch 66 is operated by the band opening / closing operation lever 63.
, The pool feed roller motor enters the high speed operation mode.

When a start switch of a control device (not shown) is operated, the pool feed roller motor is activated, and the tip end of the band B moves between the pressing roller 72 and the pool feed roller 71 in a pressure contact state. When it is guided through the band passage 57 through the gap between the feed pressing roller 76 and the feed roller 78, the pool feed roller motor is stopped by the operation of a limit switch (not shown), and the band B
Also stops sending.

Next, the feed solenoid type actuator 80 is operated by the operation of a timer or the like to rotate the swing arm 75 by a predetermined angle (counterclockwise direction in FIG. 5), whereby the connection is established. Rod 6
9 moves upward, the lock pin 65 is pulled out from the insertion hole 63c, and the lock of the band passage opening / closing operation lever 63 is released. The band passage opening / closing operation lever 63 moves the band guide 50 in the outer horizontal direction (Fig. 8 is urged in the upward direction) to be oscillated and rotated (clockwise direction in FIG. 8) by the pressing force of the coil springs 55, 55, ... And returned to the open position shown by the solid line (FIG. 8).

As described above, the distal end portion of the guide portion 52 of the band guide 50 and the outer wall 41 are separated from each other, so that the band passage 57 is opened and the band B is disengaged from the concave groove portion 52a (the restraint is released). He). At the same time, the limit switch 66 is activated to switch the pool feed roller motor to the low speed operation mode and restart, and the band B is sent out again by the pressing roller 72 and the pool feed roller 71 in the pressure contact state. On the other hand, since the tip end of the band B is stopped while being pressed against the gap between the feed pressing roller 76 and the feed roller 78, the band B is meandering as shown by the phantom line in FIG. 40 is invaded and stored.

As described above, when the solenoid actuator 80 is operated and the swing arm 75 is rotated by a predetermined angle (counterclockwise direction in FIG. 5), the feed pressing roller 76 is moved between the bands. While waiting in a state of being pressed against the feed roller 78 with B sandwiched (see FIG. 5), the feed roller 78 rotates the feed motor of the binding mechanism (not shown) after the band B is sufficiently stored. Positive direction (feed direction) due to driving force
Then, the band B stored in the pool chamber 40 goes out from the work table 4 of the packing machine 1 and enters the arch portion 5, so that the band B circulates around the object W to be packaged. Then, it returns to the inside of the packing machine 1 again, the tip of the band is brought into contact with a limit switch (not shown) to stop the pool feed roller motor, and the setting of the band B is completed.

In this way, the opening / closing operation of the band passage 57 is performed by utilizing the operating force of the solenoid type actuator for the pressure contact of the feed pressing roller 76, so that the opening / closing operation of the band passage 57 is dedicated. It is not necessary to provide the actuator of (1), and therefore the configuration can be simple and inexpensive.

Although one embodiment of the present invention has been described above, the present invention is not limited to the above embodiment, and various design changes can be made without departing from the present invention described in the claims. It can be performed. For example, when the width of the band B is relatively small, it goes without saying that the spacer of the support member 61 may be removed.

[0033]

As can be understood from the above description, according to the present invention, the opening / closing operation of the band passage can be smoothly performed, and the band can smoothly pass through the band passage. In addition, the whole structure can be configured easily and inexpensively, and energy saving can be achieved.

[Brief description of drawings]

FIG. 1 is a schematic perspective view showing an embodiment of a packing machine according to the present invention.

FIG. 2 is a partially cutaway front view of the packing machine according to the embodiment.

FIG. 3 is a right side view of the packaging machine of the embodiment with a part thereof cut away.

FIG. 4 is a partially cutaway plan view of the packing machine according to the embodiment.

FIG. 5 is a schematic front view in which an external door is opened to show the entire band passage opening / closing means according to the packing machine of the embodiment.

6 is a perspective view of a VI-VI arrow section of FIG.

7 is a sectional view taken along the line VII-VII in FIG.

8 is a sectional view taken along the line VIII-VIII in FIG.

[Explanation of symbols]

 1 ... Packing machine 3 ... Main body housing 40 ... Pool chamber 50 ... Band guide 57 ... Band passage 60 ... Band passage opening / closing means 63 ... Band passage opening / closing operation lever 65 ... Lock pin 76 ... Feed roller (feed roller) 78 ... Feed roller (feed roller) 80 ... Actuator W ... Item to be packed B ... Band

Claims (3)

[Claims] 1. A band guide 50 capable of forming a band passage 57 for guiding a band B wound around an article W to be bound by a bundling mechanism, and the band B being temporarily opened when the band passage 57 is not formed. A packing machine comprising a pool chamber 40 for storing and a band passage opening / closing means 60 for controlling opening / closing of the band passage 57 by moving the band guide 50 forward and backward from the pool chamber 40, wherein the band passage opening / closing means is provided. Reference numeral 60 is for opening and closing the band passage 57 by using a driving force of an actuator 80 which selectively presses or separates the band feed rollers 76, 78 of the pair of binding mechanisms for feeding the band B sandwiched in the gap. A packing machine characterized by the above. 2. The band passage opening / closing means 60 is interlocked with the operation of the actuator 80 to close the band guide 50 to a closed position where the band passage 57 is formed, or to move the band B from the band guide 50 to the pool. 2. The packing machine according to claim 1, further comprising a band passage opening / closing operation lever 63 that opens and closes the band passage 57 by selectively moving in parallel to an open position where the band passage 57 is opened. 3. The band guide 50 is constantly urged in a direction to open the band passage 57, and the band passage opening / closing operation lever 63 is lockable at the closed position to form the band passage 57. Along with the operation of the actuator 80, a lock pin 65 that automatically unlocks the band passage opening / closing operation lever 63 to open the band passage 57 and releases the band B into the pool chamber 40. The packing machine according to claim 2, wherein the packing machine is provided.