JP5317767B2 - Automatic strapping device - Google Patents

Description

  The present invention relates to a tightening device for an automatic strapping machine that stops a bound object that has been transported to an article transport surface at a predetermined position to form a strap and a knot, and more specifically, is wrapped around the bound object. The present invention relates to a tightening device for an automatic stringer capable of further strengthening the tightening strength of a string.

  For example, as shown in FIG. 6, a thin bundled body 10 such as a corrugated cardboard sheet folded into a sheet shape (a corrugated cardboard box is formed when assembled) is put on the market in a stacked state. It is shipped (for example, Patent Document 1).

  When carrying out stringing by automatically laying the packing string 1 on the bundle 10 of articles made of such a thin and flexible material, for example, as schematically shown in FIG. The leading end 1a of the packing string 1 drawn downward from the body 8 via the upper guide rollers 4 and 6 is locked in advance with a restraining tool 12 disposed below the article conveying surface 2 and laminated. The bundled body 10 is placed on the article conveying surface 2 including a roller conveyor, and the leading end of the bundled body 10 is pushed out in the same direction by moving the bundled body 10 in the arrow A direction. Is transported to the binding position S. As the member 10 is conveyed to the binding position S, the string 1 is pulled and the string roll body 8 rotates. Further, the packing string 1 that has been guided downward in a straight line by the conveyance of the bundle 10 is bent in the shape of a dogleg in the horizontal direction.

  Then, a packing string having a length corresponding to the deformation is newly pulled out from the string roll body 8, and the guide member 7 of the tiltable arm top guide mechanism for guiding the packing string 1 moves while tilting in the direction of arrow C. By doing so, the packing string 1 is sequentially wound around the circumferential surface of the bundled body 10 as the guide member 7 tilts in the direction of arrow C.

  In this way, when tying, the guide member 7 is gradually moved to the vicinity of the restraining tool 12 disposed below the article conveying surface 2 and the known tying means D is approached from the side of the restraining tool 12. Then, by the action of the string binding means D, a knot is formed and cut between the string leading end portion 1a wound around the restraint 12 in advance and the string trailing end side guided by the guide member 7, Bonding is taking place.

  By the way, when carrying out such string binding, even if the packing string 1 is pulled from the downstream side (the direction in which the string 1 advances from the string roll body 8 to the bound body 10), the packing string 1 is easily downstream. It is necessary to apply an appropriate back tension to the packing string 1 so as not to be pulled out. When such back tension is insufficient, the packing string 1 is loosened or entangled.

Therefore, in this type of automatic strapping machine, for example, to packing cord 1 between the two guide rollers 4 and 6, two cord retainer of the first strap pressing means 14 and the second strap pressing means 16 The cords are fed so that they are not forcibly pulled out when they are pulled from the downstream side by holding the predetermined range of the packing string 1 in a tensioned state by these string pressing means 14 and 16. Is restricted so that stringing in a tensioned state is possible and stringing in a tensioned state can be performed.

  On the other hand, nowadays, there is a demand for stringing and string tying in a state where the bundled body 10 is stronger than ever. At the same time, it is also desired to reduce the amount of packing string used as much as possible.

JP-A-8-40409

  In view of such a conventional situation, the present invention can perform string binding in a more tensioned state with respect to the object to be bound, and can reduce the amount of packing string used as much as possible. An object of the present invention is to provide a tightening device for a hanging machine.

In order to achieve the above object, a tightening device for an automatic strapping machine according to the present invention comprises:
A first string presser means disposed between the string roll body and the bundled body for preventing free movement of the packing string fed from the string roll body toward the bundled body side toward the bundled body side. When,
A second string pressing means disposed between the first string pressing means and the bundled body, and holding the packing string blocked in movement by the first string pressing means in a tension state; ,
The packing cord paid out against the material to be bound body from the string roll body, wherein by pressing respectively the first strap pressing means and said second strap pressing means, said packing of the way to the material to be bound body holds the predetermined range of the string taut, the tip end of the packing strap at these first strap pressing means and while applying a back tension to the upstream side of the packing strap at the second strap pressing means A tightening device for an automatic tying machine that wraps around a bound object,
The first string pressing means includes a cylinder, a rod of the cylinder, and a leaf spring attached to the rod of the cylinder,
The second string pressing means includes a spring device and a leaf spring that is swingably attached to the distal end side of the spring device,
further,
Substantially right angle between said first relative strap pressing means and the packing cord is in tension by said second strap pressing means, said first strap pressing means and said second strap pressing means A tension means is provided to apply a force from any direction to bend the packing string in this range into a generally U-shape ,
The tension means includes a stretchable cylinder that comes into contact with the packing string in a tensioned state so as to be separated .

  According to the present invention having such a configuration, by providing the tension means, the packing string stretched in a tension state is further tightened, so that the string is bound by tightly tensing the bundled body. Can do. In addition, the amount of string used can be reduced as much as possible.

In the present invention, the tension means includes a telescopic cylinder that releasably abuts against the tensioned packing string .

  With such a configuration, the packing string can be tightened with an easy configuration.

  According to the tightening device for an automatic strapping machine according to the present invention, since the tension means is provided between the first strap presser and the second strap presser, the first strap presser and the second strap presser It is possible to further tighten the packing string held in a tension state with the string holding means. As a result, it is possible to bind the string by tensioning more firmly, and to reduce the amount of string used.

FIG. 1 is a schematic side view of a general automatic tying machine disclosed in Japanese Patent Application Laid-Open No. 11-130014. FIG. 2 is a schematic side view of the automatic tying machine shown in FIG. 1 when viewed from the carry-in side. FIG. 3 is a perspective view of a main part of a tightening device according to an embodiment of the present invention. FIG. 4 is a schematic view of a brake device arranged upstream of the tightening device shown in FIG. FIG. 5 is a schematic view of a tensioning device disposed downstream of the tightening device shown in FIG. FIG. 6 is a perspective view of a state in which the object to be bound is flattened by a packing string. FIG. 7 is a schematic diagram for explaining the operation of a general tying machine.

  Hereinafter, a tightening device for an automatic strapping machine according to an embodiment of the present invention will be described with reference to the drawings.

  In this type of automatic tying machine, it is common that two tying is performed simultaneously on the object to be tied, and as shown in the following tying machine, The elements are configured substantially symmetrically so that they can be hung simultaneously.

  FIG. 1 is a schematic side view of a general automatic tying machine to which a tightening device according to an embodiment of the present invention is applied. FIG. 2 is a view from the carry-in side where a bundled body is conveyed in FIG. In this front view, this automatic tying machine performs two tying simultaneously. FIG. 3 is a schematic perspective view of a tightening device for an automatic strapping machine according to an embodiment of the present invention, FIG. 4 is a schematic view of a brake device 30 which is a component of the tightening device, and FIG. It is the schematic of the tensioning device 40 which is a component.

  As shown in FIGS. 1 and 2, in this type of general automatic tying machine 18, the pressing means 14 that presses the laminated body 10 from above can be raised and lowered under the drive of a motor. It is connected to and supported by the toothed rod 16.

  Further, in the automatic strapping machine 18, a binding device 24 is provided below the article transport surface 20 on which the object 10 is transported in a substantially horizontal direction. The binding device 24 is provided with the restraint 12 shown in FIG.

In such an automatic tying device 18, a so-called multi-layered bundle 10 in which a plurality of flexible articles such as corrugated cardboard sheets folded in a sheet form are stacked by a roller conveyor or the like is shown on the left side of FIG. From the direction toward the right side, it is fed onto the article conveying surface 20. The bound body 10 sent out onto the article conveying surface 20 is then straightened at the side end under the operation of the horizontal aligning device 28, and after the straightening, the string holding means 14 of the upper presser device is used. It is transferred to the position to align and stops at this position.

After stopping, the bundling body 10 is pressed from above by the strap pressing means 14, remains in the pressed state, are transported to the bundling position S defined by the stopper device 34 stops (see FIG. 7).

  As shown in FIG. 1, the bound body 10 is compressed from above by the pressing means 36 located above the binding position S, and further includes arm means 38 having a member corresponding to the guide member 7 in FIG. Bundling is performed by the bundling device 24 under the rotational movement of the.

By the way, in such an automatic strapping machine 18, the first strap presser 14 shown in FIG. 7 is generally called a brake device, and the second strap presser 16 is called a tightening device. FIG. 4 shows an example of the brake device 30, and FIG. 5 shows an example of the tensioning device 40. The brake device 30 and the tensioning device 40 are driven in the elements shown in FIG. 7, and will be described with reference to FIG.

  The brake device 30 and the tensioning device 40 operate almost simultaneously when the solid-lined bundle 10 shown in FIG. 7 is conveyed in the direction of arrow A and reaches the predetermined position S. In other words, it operates at the timing immediately before string binding to the body 10 to be bound.

  The brake device 30 is disposed closer to the string roll body 8 shown in FIG. That is, it is arranged on the upstream side.

  As shown in FIG. 4, the brake device 30 has a cylinder 60, and the rod 61 of the cylinder 60 protrudes, so that the leaf spring 62 attached to the tip portion is attached to the packing string 1 passing below. This abuts, thereby preventing free movement of the packing string 1. The leaf spring 62 of the brake device 30 is usually separated from the string 1. As a result, the string can be supplied, but the rod 61 protrudes at a timing before the string is bound, and the brake is applied to the string 1.

  On the other hand, as shown in FIG. 5, the tensioning device 40 includes a spring device 44 whose proximal end is supported on the side wall of a box-shaped housing 42. An attachment piece 45 is installed at the tip of the spring device 44, and a support bracket body 48 is attached to the attachment piece 45 in a swingable manner. Further, a link component member 49 is swingably attached to the lower end portion of the support bracket body 48 via a shaft 47. A rod 50 that expands and contracts in the vertical direction is attached to the link component 49, and one end of a plate 51 is attached to the lower end of the rod 50 as shown in FIG. A cam mechanism 52 is formed at the end. Accordingly, in the tensioning device 40, the rod 50 is expanded and contracted at a predetermined timing by the operation of the cam mechanism 52, and thereby the leaf spring 46 attached to the distal end portion of the support bracket body 48 travels in the vertical direction. Abut or separate.

That is, as the leaf spring 46 is shown in FIG. 5, when presses the packing strap 1 from the side, feed in the upward direction (a downstream side) is blocked in Figure 5 of the packing strap 1, whereas When the leaf spring 46 is tilted rightward from the state of FIG. 5 due to the compression of the spring 44a, the supply of the packing string 1 to the downstream side is allowed.

  Normally, the leaf spring 46 is separated from the string 1, and the supply of the string 1 is made free, and the string is supplied in this state. Based on the operation of the cam mechanism 52, the leaf spring 46 comes into contact with the packing string 1 as shown in FIG.

  Note that the brake device 30 and the tensioning device 40 are known and can be replaced with other configurations, and thus detailed description thereof is omitted.

In this embodiment, as shown in FIGS. 3 and 7, the brake device 30 serving as the first string presser 14 and the tensioning device 40 serving as the second string presser 16 are used. A tension means 70 constituting the main element is installed.

  Below, the tension means 70 installed between such a brake device 30 and the tensioning device 40 will be described.

  As shown in FIG. 3, the tension means 70 is incorporated together with the brake device 30 in an L-shaped device housing 22 provided below the device housing 42 in which the tensioning device 40 is built.

  The tension means 70 applies a force from a substantially perpendicular direction to the packing string 1 stretched in the horizontal direction on the way from the brake device 30 to the tightening device 40. In this embodiment, the tension means 70 is viewed from above in FIG. It is comprised so that force may act toward the downward direction.

That is, a guide roller 80 is installed in the apparatus housing 22 in which the tension means 70 is incorporated to receive the packing string 1 supplied to the downstream side via the brake device 30, and above the guide roller 80. A guide roller 78 is installed on the front side. Then, the packing string 1 locked to the guide roller 78 is guided to the guide roller 71 disposed on the lower surface of the apparatus housing 42. Thereby, the packing string 1 is maintained in a substantially horizontal posture between the guide roller 78 and the guide roller 71.

  Therefore, the packing string 1 guided in the substantially horizontal direction through the brake device 30 is guided in the horizontal direction by being sequentially locked by the guide rollers 80, 78, and 71, and further upward from the last guide roller 71. The tensioning device 40 is guided.

  The tension means 70 is configured above the guide rollers 78 and 71.

  That is, when the rod 74 of the cylinder 72 disposed above extends downward, the resin roller 79 is guided downward together with the bracket 75. When the resin roller 79 moves downward, the shaft portion 79a comes into contact with the packing string 1 stretched in the horizontal direction, and pushes the string 1 downward. Thereby, the packing string 1 stretched linearly between the guide roller 76 and the guide roller 78 is forcibly pushed downward.

  Thus, in order to guide the packing string 1 stretched in a tension state downward and strengthen the binding state with respect to the bound body, it is necessary to pull the string 1 back from the tensioning device 40 side. Therefore, in the present embodiment, the upstream brake device 30 is set to have a larger force to press the string than the downstream tension device 40.

  Thereby, the binding with respect to the to-be-bound body 10 performed in the downstream of the compression apparatus 40 becomes still stronger. Further, the length of string used can be shortened.

In addition, after the tying of the strings is finished, air is evacuated from the cylinder 60 of the brake device 30 shown in FIG. 4 and the cylinder 72 of the tension means 70 shown in FIG. 3, and the resin roller 79 shown in FIG. Return above position.

  As mentioned above, although the tightening apparatus in the automatic binding machine which concerns on one Example of this invention was demonstrated, this invention is not limited to the said Example at all.

For example, the configurations of the tensioning device 40 and the brake device 30 in the above embodiment are not limited at all, and other configurations can be adopted.

  In the above embodiment, the brake device 30, the compression device 40, and the tension means 70 are configured so as to be assembled in close proximity to each other, but they may be separated and arranged separately. Further, the tension means 70 may be configured at any position of the automatic strapping machine as long as it is between the brake device 30 and the tensioning device 40.

  Moreover, in the said Example, although applied to what is called a flat laying machine which ties the packing string 1 with the to-be-bundled body 10 in a flat state, this invention is what is called a general-purpose string which ties a string in the rounded state. It can also be applied to a hanging machine.

DESCRIPTION OF SYMBOLS 1 Packing string 1a Tip part 2 Article conveyance surface 8 String roll body 10 Bundled body 14 First string pressing means 16 Second string pressing means 30 Brake device (first string pressing means)
40 tension device (second string presser)
70 Tensioning means 72 Cylinder

Claims (1)

A first string presser means disposed between the string roll body and the bundled body for preventing free movement of the packing string fed from the string roll body toward the bundled body side toward the bundled body side. When,
A second string pressing means disposed between the first string pressing means and the bundled body, and holding the packing string blocked in movement by the first string pressing means in a tension state; ,
The packing cord paid out against the material to be bound body from the string roll body, wherein by pressing respectively the first strap pressing means and said second strap pressing means, said packing of the way to the material to be bound body holds the predetermined range of the string taut, the tip end of the packing strap at these first strap pressing means and while applying a back tension to the upstream side of the packing strap at the second strap pressing means A tightening device for an automatic tying machine that wraps around a bound object,
The first string pressing means includes a cylinder, a rod of the cylinder, and a leaf spring attached to the rod of the cylinder,
The second string pressing means includes a spring device and a leaf spring that is swingably attached to the distal end side of the spring device,
further,
Substantially right angle between said first relative strap pressing means and the packing cord is in tension by said second strap pressing means, said first strap pressing means and said second strap pressing means A tension means is provided to apply a force from any direction to bend the packing string in this range into a generally U-shape ,
The tensioning device for an automatic strapping machine, characterized in that the tension means includes a telescopic cylinder that detachably contacts the tensioned packing string .

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