JPS6135237A - Detector for setting size of blank in box-making machine - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a box making machine that assembles sheet-like blanks to form a box, and particularly relates to a blank setting that accurately detects the leading edge of each blank. This invention relates to a dimension detection device.

[Prior art and problem 1] In the box-making machine described above, a plurality of blanks are conveyed continuously at intervals, and a sensor detects the leading edge of each blank to instruct the operation of the next process. We are trying to form a

FIGS. 3 and 4 illustrate such a mold box process, in which a plurality of photosensors 2a, 2b are placed facing the traveling path l of the blank B conveyed from right to left as shown by the arrow.
, 2c are arranged, and when the photo sensor 2a of the hand 11η detects the tip of the traveling blank B, the already known bending members 3 and 3a move or rotate to connect the four corners of the blank B. When the piece 4 is bent and the primary photosensor 2b detects the tip of the traveling blank B, the upper folding members 3b and 3c move or rotate to bend one side plate 6.6 of the blank B. . There is also a primary photosensor 2c.

When the tip of the bent blank B is detected, the adhesive from the nozzle 7 is applied to the adhesive surface of the blank B (in this case, the connecting piece 4), and the adhesive is applied to the other side of the area where the adhesive was applied. A folded box B1 is formed by bending the face plate 5 using a known bending member and gluing the connecting piece 4 to the corner of one side plate 8.

Incidentally, in recent years, perforated boxes have been manufactured in which many small holes 8 are bored in the bottom side 9 of the box and each side panel 5, 8 in order to maintain air permeability. As shown in FIG. 4, small holes 8,8, . . . are made in the blank B itself, and a box is formed from the blank B.

However, such a perforated blank B is
When conveyed along the respective photosensors 2a, 2b, 2
G misdetected the edge of the small hole 8 as the tip of the blank B, and the bending members 3.3a, 3b, 3c and the nozzle 7
etc. may malfunction.

[Object of the Invention] In view of these points, the present invention provides a blank in a cylinder making machine so that even if the blank B has small holes 8, only the tip of the blank date can be accurately detected. An object of the present invention is to provide a set dimension detection device.

[Means for Solving the Problems] The present invention continuously transports a plurality of blanks B at intervals, and detects the tip of each blank B being transported using a sensor 2.
In a cylinder making machine that sequentially forms boxes by detecting the signal and instructing the operation of the next step, a flip-flop lO to which the signal detected by the sensor 2 is input, and a blank B
a setting switch 11 for setting a set dimension longer than the length of the blank B; a counting circuit 13 for counting the traveling distance of the blank B to which signals from the encoder 12 and the flip-flop 10 are input;
and a comparison circuit 14 which outputs a signal to the flip-flop lO when a signal from the sensor is input and the travel distance of the blank B matches the set dimension, and until the signal from the comparison circuit 14 is input, the sensor The flip-flop 10 continues to hold the output of the blank detection signal from 2.

[Embodiments of the invention] The present invention will be explained below with reference to embodiments shown in the drawings.

FIG. 1 shows an embodiment of the present invention, in which a photosensor 2 detects the tip of each blank B, and the signal detected by this photosensor 2 is inputted to a flip-flop 10. It has become. Note that this photosensor 2 may be of a reflective type or a transmissive type.

On the other hand, a setting switch 11 is provided for setting and fixing a setting dimension longer than the length of the blank B.

For example, the length of the blank B is 30 mm.
If the layer is 0m, the layer is set to 310m to prevent malfunctions caused by the small holes 8 of blank B. The dimensions set by this setting switch 11 are input to a comparison circuit 14, which will be described later. Further, a counting circuit 13 is provided to which signals from the encoder 12 and the flip-flop lO are input, and signals such as the number of rotations of a motor (not shown) for running the blank B are sent from the encoder 12 to the counting circuit 13. When input, this counting circuit 13 calculates the travel distance of the blank B together with the blank B leading edge detection signal input from the flip-flop lO.

The counting signal of the counting circuit 13 is inputted to the comparing circuit 14, and when the distance traveled on the blank day from the counting circuit 13 matches the dimension set by the setting switch 11, the counting signal from the comparing circuit 14 is inputted to the comparing circuit 14. Flip Flop 7p!
It is designed to output a signal to 0. ′
The flip-flop 10 outputs a tip detection signal to a device control member (not shown) only when the detection signal from the photosensor 2 is input after the signal from the comparison circuit 14 is input.

According to such a configuration, as shown in FIG. 2, even if the photosensor 2 detects a small hole 8 other than the tip of the blank B as shown in FIG. 5 and outputs a signal to the flip-flop lO. , the flip-flop lO locks the signal from the photosensor 2 unless a signal indicating that the blank B has traveled a distance equal to or longer than the length of the blank day is input from the comparison circuit 14, so that the signal from the comparison circuit 14 is locked. The signal outputted from the flip-flop 10 after being inputted is nothing but the leading edge of the next blank B.

Therefore, according to this embodiment, even if the blank B has a small hole 8 formed therein, it is possible to accurately detect the tip of the next blank. 7 is prevented from malfunctioning.

[Effects of the Invention] As explained above, according to the present invention, only the tip of the blank can be accurately detected while ignoring small holes in the blank, thereby preventing malfunctions when forming one box. It has the excellent effect of preventing

[Brief explanation of drawings]

Fig. 1 is a control circuit diagram showing an embodiment of the blank setting size detection device in a box making machine according to the present invention, Fig. 2 is a time chart showing the action of the t51 diagram, and Fig. FIG. 4 is a side view showing the positional relationship between the photosensor, the bending member and the nozzle, and FIG. 5 is a plan view of the perforated blank. l...Travel path 2...Photo sensor lO・
・Content flip-flop 11 `` '' Setting switch 12 ・・Content encoder 13 ・ Counting circuit 14 ・ Comparison circuit B ・
1 blank patent applicant Tanabe Shiko Machine Manufacturing Co., Ltd. Output 5! P2 Figure 2... Photo sensor 10... Flip 70 knob 11... Setting switch 12... Encoder 13... Counting circuit 14... Comparison circuit B... Blank No. 3i! 1 year old 4 Figure 1...Travel path B...Blank

Claims (1)

[Claims] In a box-making machine that sequentially transports a plurality of blanks at intervals and sequentially forms boxes by detecting the tip of each of the transported blanks with a sensor and instructing the operation of the next process, a flip-flop to which a signal detected by the sensor is input; a setting switch to set a set dimension longer than the length of the blank; a counting circuit to which signals from an encoder and the flip-flop are input and count the traveling distance of the blank; A comparator circuit outputs a signal to the flip-flop when a signal from a setting switch and a counting circuit is input and the distance traveled by the blank matches a set dimension, and until a signal from the comparator circuit is input. A set dimension detection device for a box making machine, characterized in that a flip-flop continues to output a blank detection signal from a sensor.