JP4615793B2 - Bonding failure detection device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a detection device that detects a binding failure of a string that binds piled sheets.
[0002]
[Prior art]
A folder gluer transports a blank for forming a cardboard box in one direction, bends both ends of the blank in the same direction during the transport, and bonds the overlapping portions of both ends to form a flat box. ing.
[0003]
A flat box formed by folder gluer has a three-layer structure at the position of the adhesive portion, and has a two-layer structure at both ends and a non-uniform thickness, and therefore cannot be stacked stably.
[0004]
For this reason, in the folder gluer, flat boxes are stacked in the discharge section, and when a predetermined number of boxes are stacked, they are transported toward the binding device, and the both sides of the stacking boxes are transferred by the binding device. Are automatically tied together with a string.
[0005]
Here, if the bundling by the bundling device is incomplete, cargo collapse occurs and scatters at the stage of transportation, and therefore, whether or not the bundling is good is performed after the bundling.
[0006]
There are cases where the tying of the string is incomplete and cases where the tying is loose even if the tying is complete. As a binding failure detection apparatus capable of automatically detecting the binding failure, a device described in Japanese Patent Publication No. 1-34842 is conventionally known.
[0007]
In the above-described binding failure detection device, a guide is attached to a clamping press capable of moving up and down to hold a pile of boxes through a bracket, and the reciprocating body is supported by the guide so as to be movable up and down. A claw is provided at the lower end of the claw plate that swings in conjunction with the guide, and when the clamping press is lowered, the guide is lowered with respect to the reciprocating body that abuts against the upper surface of the pile box and stops, The nail plate is swung in the direction in which the nail moves forward by a simple movement.
[0008]
Then, the claws and the pile boxes are bound together, and when the weight of the pile boxes acts on the claws when the tightening press is raised after the bundles, the claws are swung in the direction in which the claws are detached from the bundle strings, It is judged that the binding is good by the swing of the nail plate.
[0009]
Also, for example, when the tying of the binding string is incomplete and the weight of the stacking box does not act on the nail, the nail plate is raised while the nail is held in the binding position, and the binding is It is determined that it is defective, and a binding defect signal is generated.
[0010]
[Problems to be solved by the invention]
By the way, in the binding defect detection device described in the above publication, if the binding string is incompletely knotted, the binding defect can be reliably detected, but if the binding string is loose, When the binding string is lifted while being held in the binding position and the loosening of the binding string is absorbed and the binding string is tensioned by the rise, the weight of the pile box acts on the claws.
At this time, it is determined that the claw plate swings in the direction in which the claw is detached from the binding string and the binding is good. For this reason, it is not possible to detect a detection failure when the binding string is loose.
[0011]
Also, in the case of a stacking box body with good binding, the nail of the nail plate is detached from the binding string while rubbing the top surface of the stacking box body, so there is a risk of scratching the top surface of the stacking box body, and the overall configuration is There is also the inconvenience of being complicated.
[0012]
An object of the present invention is to provide a binding failure detection device having a simple configuration that can reliably detect a binding failure and can determine whether the binding is good without damaging the sheet surface. .
[0013]
[Means for Solving the Problems]
In order to solve the above-described problems, in the present invention, a transport conveyor that transports a piled sheet bound by a string to an inspection unit, and a suction pad that sucks an upper surface of the piled sheet that is transported to the inspection unit and stops. A suction lifting device having the suction pad moved up and down by the lifting device, and whether or not the piled sheets are lifted on the transport surface of the transport conveyor by the suction lifting device and not being lifted A configuration comprising a detection sensor that outputs a binding failure signal when the sensor is detected is adopted.
[0014]
If comprised as mentioned above, when the adsorption | suction raising / lowering apparatus adsorb | sucks and pulls up the upper surface of a piled-up sheet, if the binding is reliable, the whole piled-up sheet will be lifted up. On the other hand, if the tying of the string is incomplete, or if the binding string is loose and incomplete, only the uppermost sheet is lifted upward. For this reason, it is possible to reliably detect a binding failure of the stacked sheets by detecting that the entire stacked sheets are not lifted by the detection sensor.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings. As shown in FIG. 1, a plurality of stacked flat boxes (hereinafter referred to as “stacked sheets A”) are transported toward the binding unit 2 by the transport conveyor 1, and from the binding unit 2 to the inspection unit 3. It is conveyed toward.
[0016]
A binding device 4 is provided in the binding unit 2. As shown in FIG. 2, the binding device 4 binds both sides in the transport direction of the piled sheets A being conveyed with a string a.
[0017]
The inspection unit 3 is provided with a stopper 5 for stopping the piled sheets A after being bundled. The stopper 5 is supported so as to be swingable about a shaft 6 and is raised and lowered by a cylinder 7. The stacked sheets A are brought into a stopped state by a stopper 5 held in an upright state. Above the piled sheets A held in a stopped state, a suction lifting device 10 that sucks the upper surface of the piled sheets A and lifts it upward is provided.
[0018]
The suction elevating device 10 is provided with a pad support member 12 below a cylinder support plate 11 that is fixedly arranged, and a plurality of suction pads 13 that suction the upper surface of the stacked sheets A are attached to the pad support member 12. Further, a rod 14 whose lower end is connected to the pad support member 12 is slidably inserted into a guide tube 15 provided on the cylinder support plate 11 to support the pad support member 12 so as to be movable up and down. Is moved up and down by a cylinder 16 as a lifting device supported by a cylinder support plate 11.
[0019]
One suction pad 13 may be provided, or a plurality of suction pads 13 may be provided as illustrated.
[0020]
Now, when the bound pile sheets A are conveyed toward the inspection unit 3 and held in a stopped state by contact with the stopper 5, the pad support member 12 is lowered by the operation of the cylinder 16. When the suction pad 13 comes into contact with the upper surface of the piled sheets A and is sucked, the pad support member 12 is raised by the operation of the cylinder 16.
[0021]
At this time, if the stacking of the stacked sheets A is complete, the stacked sheets A are attracted and transported upward, and are lifted upward from the transport surface of the transport conveyor 1 as shown in FIG.
[0022]
On the other hand, if the tying of the string a that binds the stacked sheets A is incomplete, or if the string a is loosened and the binding is incomplete, only the uppermost sheet S of the stacked sheets A is lifted upward. .
[0023]
As described above, when the stacking sheets A are completely bound, the suction lifting device 10 lifts the whole, and when the stacking is incomplete, only the uppermost sheet S is lifted upward. It is possible to detect a binding defect by detecting whether or not.
[0024]
In order to detect the binding failure, as shown in FIG. 2, a detection sensor PH for detecting whether or not the stacked sheet A is lifted to a predetermined height is provided on the side of the stacked sheet A stopped and held by the stopper 5. Provided.
[0025]
Here, as the detection sensor PH, a sensor comprising a light emitting element 17 and a light receiving element 18 is adopted. After the pad support member 12 is lifted and stopped, the light emitting element 17 emits light, and the light is blocked by the piled sheets A and received by the light receiving element. When 18 cannot receive light, it outputs a binding failure signal and operates a signal generator such as an alarm.
[0026]
In this manner, the upper surface of the piled sheet A after being bundled is sucked by the suction pad 13 of the suction lifting device 10, the suction pad 13 is pulled up in the sucked state, and the detection sensor PH detects that the piled sheet A has not been lifted. By doing so, it is possible to reliably detect the binding failure of the stacked sheets A. Moreover, since it is the structure which lifts the piled sheet A with the suction pad 13 and discriminate | determines the quality of a bundling, it can discriminate | determine the quality without damaging the surface of the piled sheet A.
[0027]
Since the piled sheet A with good binding is lifted by the suction pad 13, the light receiving element 18 does not receive the light from the light emitting element 17 and the signal generator does not operate. A is lowered and placed on the transport surface of the transport conveyor 1, and after the stopper 5 is overlaid, it is transported by the transport conveyor 1 and discharged from the inspection unit 3.
[0028]
On the other hand, the piled sheets A having poor binding are manually taken out from the conveyor 1.
[0029]
Or you may make it take out and remove the piled sheet A which is a binding defect by operating a defect removal apparatus with the binding defect signal from detection sensor PH.
[0030]
In the embodiment, the entire piled sheet A after being bundled is lifted from the conveying surface of the conveyer 1 by the adsorption lifting device 10, but only the leading end or the trailing end in the transfer direction of the piled sheet A is moved upward. You may make it lift.
[0031]
In the embodiment, the stacked sheets A are formed by stacking flat boxes, but the sheet material forming the stacked sheets A is not limited to the box, and may be a sheet such as a cardboard sheet. Good.
[0032]
【The invention's effect】
As described above, the present invention has a simple configuration including the suction elevating device that attracts the upper surface of the stacked pile sheets with the suction pad and pulls them upward, and the detection sensor that detects whether the pile sheets are lifted. Therefore, it is possible to reliably detect the binding failure of the stacked sheets and to determine whether the binding is good by lifting the stacked sheets with the suction pad, so that the quality of the binding can be determined without damaging the sheet surface.
[Brief description of the drawings]
FIG. 1 is a front view showing an embodiment of a binding failure detection device according to the present invention. FIG. 2 is a cross-sectional view taken along the line II-II of FIG. Front view showing the state 【Explanation of symbols】
A Stacked sheet 10 Suction lifting device 13 Suction pad 16 Cylinder PH detection sensor

Claims (1)

A conveyor that conveys the piled sheets bound by the string to the inspection unit, and a suction pad that sucks the upper surface of the piled sheets that are conveyed and stopped by the inspection unit, and the suction pad is moved up and down by the lifting device And a detection sensor that detects whether or not the stacked sheets are lifted on the transport surface of the transport conveyor by the suction lift and that outputs a binding failure signal when it is detected that the stack is not lifted. A device for detecting defective binding.

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