JP4698872B2 - Residual prevention device for packing band - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a packaging band remaining prevention device for preventing a packaging band from remaining in a band groove of a band guide during an opening operation of a band guide of an arch type packaging machine.
[0002]
[Prior art]
In the arch type packing machine, the packing band is fed into the band groove of the band guide with a U-shaped cross section whose opening side is pressed against the inner surface of the arch, and the packing band sent into the band groove is pulled back at high speed to be packed. Wrap around the object, pull back the packing band wrapped around the object to be packed and tighten it, then cut the back end of the band and bond the back end to the front end (usually welding) to pack the object to be packed is doing. The packing band is pulled back at a high speed immediately after the band guide is forcibly opened in the direction away from the inner surface of the arch and the packing band is completely or partially removed from the band guide. .
[0003]
[Problems to be solved by the invention]
By the way, the band groove of the band guide is formed with a relatively small width or thickness (especially thickness) so that the leading end of the packing band can be reliably driven without being bent. Therefore, when the band guide is opened and operated, the packing band follows the movement of the band guide due to the frictional force between the inner surface of the band groove and the packing band, and the packing band remains in the band groove. There is a risk of it. If the band is tightened at a high speed while the packing band remains in the band groove, the band guide is momentarily deformed and damaged when the packing band is pulled out.
[0004]
SUMMARY OF THE INVENTION Accordingly, the present invention provides a packaging band remaining prevention device that ensures that the packing band is pulled out of the band groove during the opening operation of the band guide and that does not impair the smooth opening operation of the band guide. With the goal.
[0005]
[Means for Solving the Problems]
In order to achieve this object, the packing band residual prevention device of the present invention is configured such that when the band guide disposed in the arch of the arch type packing machine is opened and operated, the packing band moves together with the band guide. A device for preventing a packing band from remaining in a band groove, wherein an extruding pin slidably inserted into a through hole provided in a back portion of the band guide, and a head of the extruding pin A pin receiver disposed on the side, and a spring member disposed between the back portion of the band guide and the head of the push-out pin, and presses the head of the push-out pin so as to slidably contact the pin receiver And. The through hole penetrates from the back surface of the band guide to the band groove. When the band guide is pressed against the inner surface of the arch and the head of the push pin is pushed by the spring member and pushed against the pin holder, the tip of the push pin does not enter the band groove or enters a little ing. Therefore, the feeding of the packing band into the band groove of the band guide is not hindered by the push pin. When the packing band is fed into the band groove of the band guide and the band guide is moved away from the arch contact inner surface, that is, the opening side is moved away from the arch contact inner surface, the spring member is deformed to open and act as an extrusion pin. The tip portion of the lens penetrates deeply into the band groove and pushes out the band or band portion following the band guide from the band groove. Since the push pin only abuts against the pin receiver, that is, the push pin can slide or slide relative to the pin receiver, so even if the band guide vibrates during opening operation, the frictional force between the push pin and the band guide There is no such a problem that the opening of the band guide becomes hindered due to an increase in the size of the band guide. The spring member functions to keep the push pin in contact with the pin receiver when the band guide returns or operates to return, and the return force or substantial return assisting force is applied to the band guide. In many cases. The spring member usually applies a pressing force or a pressing assist force to the inner surface of the arch to the band guide. The spring force of the spring member is such that when the band guide opens and operates, the contact pressure between the head of the push pin and the pin holder does not become excessive, and the push pin can slide with ease against the pin holder. It is preferable that If a compression coil spring fitted to the push pin is used as the spring member, the structure of the residual prevention device can be simplified. The position where the residual preventing device of the present invention is provided can be a portion where the band is likely to follow the forced opening operation of the band guide, for example, an arch or a corner portion of the band guide.
[0006]
As the pin receiver, a pin receiving member fixed to the arch can be used, but an arch plate on the opposite side of the arch plate against which the band guide is pressed can also be used as it is.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0008]
FIG. 1 is a diagram schematically showing a band guide portion of an arch-type packaging machine equipped with a packaging band residual prevention device according to the present invention, FIG. 2 is a diagram showing details of an upper support device, and FIG. It is a figure which shows the structure of a push type | mold solenoid plunger.
[0009]
The upper center portion of the band guide 5 having a U-shaped cross section arranged in a loop shape along the arch 3 of the arch type packing machine 1 is supported by the upper support device 7. The upper support device 7 includes a moving support member 9 fixed to the upper center portion of the band guide 5, one arch plate portion 11 (front arch plate portion) and the other arch plate portion 13 (rear side) above the arch 3. A guide rod 15 that is mounted between the arch plate portions and extends in the front-rear direction, that is, horizontally or in parallel with the width direction of the band guide 5 (the width direction of the packing band), and slidably supports the moving support member 9; And a compression coil spring 17 fitted on the guide rod 15 located between the arch plate portion 13 and the movable support member 9. Here, the band guide 5 is in a state in which the opening side of the band groove 19 is pressed against the one arch plate portion 11 mainly by the spring force of the compression coil spring 17 (the band guide 5 is entirely in the band groove). The opening side of 19 is pressed against one arch plate portion 11 (including the lower abutting member)), and a packing band 21 is fed into the band groove 19. When the band guide 5 is opened, the movable support member 9 moves backward along the guide rod 15 against the spring force of the compression coil spring 17 together with the band guide 5, that is, the direction in which the band guide 5 moves away from the one arch plate portion 11. Move to. The band groove 19 is formed so as to be thin, and even if the band 21 for packing is pulled out, even if it is caught on the inner surface of the band groove 19, the band groove 19 can be removed smoothly. The side wall (the lower wall in FIG. 2) is formed slightly thin.
[0010]
Each of the second corner portion and the third corner portion of the arch 3 is provided with a push-type solenoid plunger 23 for opening operation fixed to one arch plate portion 11, and the operation portion 25 of this push-type solenoid plunger 23 is a band. The band guide 5 is attached to the guide 5 and when the push solenoid plunger 23 is actuated (the actuating part 25 moves in the direction of the arrow in FIG. 3), the band guide 5 is pulled by the actuating part 25 and away from one arch plate part 11 Move to and open. In FIG. 1, reference numeral 27 denotes a return spring member composed of a stick 29 and a tension coil spring 31 connected to the lower end of the stick 29. The upper end of the stick 29 is rotatable to one arch plate portion 11. The lower ends of the tension coil springs 31 are respectively attached to the left and right side portions of the band guide 5.
[0011]
An operation shaft 33 is rotatably disposed along the lower part of the band guide 5 below the arch 3, and the operation shaft 33 and the lower part of the band guide 5 are connected by a link 35. One end of the operating shaft 33 is connected to the lower solenoid plunger 37, and the operation shaft 33 is rotated by the operation of the lower solenoid plunger 37, and the band guide 5 is opened and operated via the link 35. . In addition, the lower part of the band guide 5 is pushed by the lower spring (not shown) in the direction which contacts the arch plate part 11.
[0012]
Therefore, by operating the push solenoid plunger 23 and the lower solenoid plunger 37 simultaneously, the entire band guide 5 moves in a direction away from the one arch plate portion 11 to perform an opening operation. The arch 3 is provided with a packing band residual prevention device 39 that prevents the packing band 21 from following the band guide 5 and remaining in the band groove 19 when the band guide 5 is opened. .
[0013]
FIG. 4 is a diagram showing details of the packing band residual prevention device 39, showing a state before the band guide 5 is opened, and FIG. 5 is a diagram showing a state after the band guide 5 is opened.
[0014]
Each corner portion of the arch 3 is provided with a packing band residual prevention device 39. The residual prevention device 39 includes a pin receiver 41 (pin receiving member) made of a metal plate, an extrusion pin 45 having a head 43 at the rear end, and a compression coil spring 47. A fixed portion 49 fixed to the arch plate portion 11, a width direction portion 51 extending rearward from the front end of the fixed portion 49, that is, in the width direction of the band guide 5, longer than the width of the band guide 5, and the width direction It is integrally formed from a back surface portion 55 (pin receiver) that extends in parallel to the arch 3 or the arch plate portions 11 and 13 from the front end (or rear end) of the portion 51 and is located on the rear side of the back portion 53 of the band guide 5. Yes. The back portion 53 of the band guide 5 is provided with a through hole 57 extending from the back surface to the band groove 19, and the push pin 45 is slidably inserted into the through hole 57 from the front end side. The compression coil spring 47 is positioned between the back surface of the band guide 5 and the head 43 of the push pin 45 and is fitted to the push pin 45. The head 43 of the push pin 45 is always pinned by the compression coil spring 47. It is pressed against and contacted with the back surface portion 55 of the receiver 41. Before the opening operation of the band guide 5, the band guide 5 is pressed against the compression coil spring 47 or pressed against the compression coil spring 47 and pressed against one arch plate portion 11. It is in the state which is located in the front-end | tip of and cannot enter in the band groove | channel 19. FIG. When the band guide 5 starts to open against the spring force of the compression coil spring 47, the tip of the push pin 45 enters the band groove 19 and reaches the opening position of the band groove 19 when the band guide 5 is fully opened. Move forward relatively. Therefore, even if the packing band 21 moves following the band guide 5, the packing band 21 is pushed out of the band groove 19 by the push pin 45, and when the opening operation of the band guide 5 is completed, the packing band 21 is entirely removed from the band guide 5. It is in a state that has come out.
[0015]
After the packing band 21 is pulled back and tightened, the rear end portion of the packing band 21 is cut, and the rear end portion and the front end portion are welded, the energization to the push type solenoid plunger 23 and the lower solenoid plunger 37 is cut off. The band guide 5 comes into contact with one arch plate portion 11 by the spring force of the compression coil spring 17 of the upper support device 7, the return spring member 27, the compression coil spring 47 of the packing band residual prevention device 39 and the lower spring. To return.
[0016]
【The invention's effect】
As described above, by using the packing band residual prevention device of the present invention, it is possible to prevent the packing band from remaining in the band groove when the band guide is opened, and the band guide is Even if it vibrates, the push pin can move following the band guide, so that a smooth opening operation of the band guide can be ensured.
[Brief description of the drawings]
FIG. 1 is a diagram schematically showing a band guide portion of an arch-type packing machine equipped with a packing band residual prevention device according to the present invention.
FIG. 2 is a diagram showing details of an upper support device.
FIG. 3 is a view showing a configuration of a push-type solenoid plunger for opening operation.
FIG. 4 is a diagram showing details of the packing band residual prevention device, and shows a state before the band guide is opened.
FIG. 5 is a diagram showing details of the packing band residual prevention device, and a diagram showing a state after the band guide is opened.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Arch type packing machine 3 Arch 5 Band guide 19 Band groove 21 Packing band 39 Packing band residual prevention device 41 Pin receiver 43 Head 45 Extrusion pin 47 Compression coil spring (spring member)
53 Back 57 Through-hole

Claims (2)

When the band guide arranged in the arch of the arch type packing machine is opened and operated, the packing band remaining prevention device prevents the packing band from moving together with the band guide and remaining in the band groove. And
An extruding pin that is slidably inserted into a through-hole provided in the back portion of the band guide so that the head portion is located on the rear side of the back portion of the band guide, and on the rear side of the head portion of the extruding pin. and placed Ru with a pin-receiving receiving pin fixed to the arch member is arranged between the band guide the back and head of the extrusion pin of the pin by pressing the head of the push-out pin A compression coil spring fitted on the push-out pin, which is slidably brought into contact with the receiver ,
The device for preventing a packing band from remaining , wherein the band guide is configured to be able to open and operate by compressing the compression coil spring . When the band guide arranged in the arch of the arch type packing machine is opened and operated, the packing band remaining prevention device prevents the packing band from moving together with the band guide and remaining in the band groove. And
An extrusion pin that is slidably inserted into a through-hole provided in a back portion of the band guide so that a head is located behind the back portion of the band guide, and the back portion and the extrusion pin of the band guide is arranged between the head, pushing the head of the push-out pin, the slidably abut the arch plate positioned on the rear side of the head, and a compression coil spring fitted to the push-out pin With
The device for preventing a packing band from remaining, wherein the band guide is configured to be able to open and operate by compressing the compression coil spring.

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