JPS63180840A - Falling-down detector of article to be conveyed in covneyor - 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 provides a method for detecting whether rectangular parallelepiped-shaped conveyed articles, which are sequentially conveyed on a running conveyor and are in an upright state, have fallen down during conveyance. This invention relates to a detection device.

[Conventional technology]

Conventionally, rectangular parallelepiped-shaped items such as splitter-shaped (brick-shaped) or double-top (gable-topped) bag containers filled with liquid foods such as milk or juice are generally transported on a conveyor with a flat conveyor surface on a production line. When the articles are sequentially conveyed in an upright state (the highest height) with the outer wall of the minimum area as the bottom surface, the articles may fall down during conveyance for some reason. When the next process is carried out with the conveyed article in an upright state, if the conveyed article falls down, problems will occur in the processing process, but with conventional conveyed article detection devices, it is possible to detect whether the conveyed article has arrived using a single signal. The detection device was unable to detect the falling of the incoming conveyed article.

[Problem that the invention seeks to solve]

Since such conventional devices cannot detect the falling of conveyed articles, constant monitoring by personnel from the side of the conveyor line is required in order to detect and repair the falling. The present invention has been made in view of the above points, and even if the sides of the conveyor line are not constantly monitored,
It is an object of the present invention to provide a lodging detection device capable of detecting lodging of conveyed articles on a conveyor.

[Means for solving problems]

In the present invention, a conveyor (1) configured to convey a rectangular parallelepiped-shaped conveyed article (C) is provided on the side of the conveyance path so as to face the side wall of the conveyed article (C) on the conveyor (1). , upper and lower two-stage photoelectric detection device (D), (D),
The optical path between each light emitting part (D1) and light receiving part (D2) crosses the path of the conveyed article (C), and the light beam from the light emitting part (D1) of the lower photoelectric detection bag W (D) is Even when the conveyed article is in a lying down state, the light emitting part (0) of the upper photoelectric detection device (D) is blocked by the lying conveyed article.
The light rays from the + The conveyor (
1) Lodging at the top is detected.

[For production]

In the apparatus of the present invention, when the conveyed articles (C) are sequentially conveyed while maintaining an upright state, the upper and lower photoelectric detection devices (D),
The lower photoelectric detection device (D) in (D) detects when the optical path between the light emitting section (0+) and the light receiving section (D2) is blocked by the arriving article (C). However, in this case, a cutoff signal is generated in the same manner as above and below, and there is no difference between them, so it is not detected that the conveyed article (C) has fallen down on the conveyor Tll, When the conveyed article (C) arrives, even if the lower photoelectric detection device (D) detects the arrival of the conveyed article, the upper photoelectric detection device (D) does not detect its arrival and the difference in detection signals is It is possible to detect the falling of the conveyed article (C) on the conveyor (1) by this occurrence, and this can be used to detect the falling of the conveyed article (C) on the conveyor (1).
C) A toppling signal (lamp or audio) can be generated to allow personnel to remove the tipped conveyed item or return it to an upright position.

〔Example〕

Embodiments of the present invention will be described based on the accompanying drawings.

FIG. 1 is a cross-sectional view of the main parts showing the device of the present invention attached to the conveyance path of a conveyor, and FIG. 2 is a plan view of FIG. 1.
FIG. 3 is a side view of the main parts as seen from A in FIG. 1.

The conveyed article (C) is a rectangular parallelepiped-shaped paper pack filled with a liquid food such as milk or juice, and is conveyed on a moving conveyor (1).

The conveyor (1) is a chain-like conveyor (not shown in detail) with a flat conveyance surface, and conveyor support plates aυ arranged in upper and lower stages along the path of the conveyor (1).
, aD in a circular motion, that is, in an upside-down direction, so that the conveyed article (C) can be conveyed by the upper conveyor. In addition, on both sides of the conveyor path (conveyance path), there are two upper and lower stages of opposing guide pipes (2), (2) in order to regulate and guide the direction of conveyed articles (C) conveyed on the conveyor. It is located in

A support stand (5) for mounting a photoelectric detection device (D) is provided at a predetermined position on the conveyance path where the falling of the conveyed article (C) is to be detected.
are attached to the tops of the outer plates (3) and +31 of the opposing side plates for attaching the upper and lower conveyor support plates αυ and αD, respectively, and photoelectric detection is installed on the columns (4) planted in the support bases (5). The device (D) has a light emitting section (n+) consisting of a lamp house, a lens system, etc., and a light receiving section (D2) consisting of a phototube, etc., with only the light emitting section (D1) on one side and another side with the conveyor (1) in between. On one side facing each other, only the light receiving section (D2) is arranged in upper and lower two stages, and the light emitting section (D I ) and the light receiving section (D
2) The optical path between the lower stage side is over the lower guide pipe (2), and the upper stage side is over the upper guide pipe (2).
) is installed across the aisle. In this way, the light emitted from the light emitting part (D1) of the lower photoelectric detection device CD) hits the side of the fallen conveyed article (C) on the conveyor (1), and the upper photoelectric detection device (D) Light projecting section (D1)
In other words, the light path is set so that the light can only be projected onto the upper side of the conveyed article (C) in an upright state without projecting the side surface of the conveyed article (C) that has fallen down. upper and lower photoelectric detection devices (I1),
The overturning of the conveyed article (C) on the conveyor (1) is detected based on the difference in the light blocking signal which is the detection signal from (D). In other words, the lower photoelectric detection device (D
), when the conveyed article (C) passes through the photoelectric detection device (D), the signal from the light receiving section (D2) detects the arrival of the conveyed article and always generates a cutoff signal. This can be used to start the next processing signal, etc., and when the conveyed article (C) is in an upright state, the upper and lower optical paths are simultaneously interrupted (see Figure 4), and a light interruption signal is generated at the same time. Although there is no difference, when a fallen conveyed article <C> comes (see Fig. 5), the light receiving part (D2) of the upper detection device (D)
does not generate a cutoff signal, so the upper and lower detection devices (D
) and (D), this is detected by a known detection device (not shown), and the detected signal generates a signal (lamp or sound) for the conveyed article (C) to fall over, so that personnel can The fallen conveyed article can be removed or returned to an upright position. The above case is advantageous when packages, which are transported articles, are transported at slight intervals and subjected to appropriate processing (such as pasting on straws).

In addition, in the examples, the light emitting part (
D1) and the light receiving section (D2) is connected to the conveyor (1).
The conveyor path is arranged so as to diagonally cross the conveyance path of the conveyance path, and this is particularly intended to convey the conveyed articles (C) in close proximity and continuously while maintaining a predetermined interval between the articles (Fig. 6). reference)
This is advantageous when the next process, for example, the accumulation process in a paper board frame, is carried out all at once. In such a case, the zero-lodging detection device is installed in front of the terminal end of the conveyor (1), and the zero-lodging detection device is installed in front of the terminal end of the conveyor (1) on the side adjacent to the dead-end plate-shaped stopper disposed across the conveyor (1). A signal for controlling the pusher for extrusion from the side is applied from the light receiving part of the photoelectric detection device using a time switch.

In other words, the supply and reception of the stacking processing unit into the paperboard frame is carried out when there is a fallen conveyed article at the inlet, which is blocked by a plate-shaped stopper and a predetermined number (for example, 3) of packages are pushed into the paperboard frame in a close state. To avoid damage, the device detects the overturning of the product in advance and prevents the pusher from operating, and also generates an overturning signal (lamp or sound) so that personnel can remove the overturned conveyed item or return it to the upright position. However, in order to operate the pusher, it is of course necessary to avoid giving a signal to all the conveyed articles as a signal to the pusher when a part of the stopper pushes the conveyed articles to a predetermined number (for example, 3) at once. In addition, if the space between adjacent conveyed articles (C) and (C) is too wide than a predetermined distance, the optical path should be made to pass between the light emitting part (D1) and the light receiving part (D2) (see Fig. 7). , it detects this and stops the operation of the pusher to help prevent problems from occurring.

In each of the above embodiments, the light emitting part (D1) and the light receiving part (D2) of the photoelectric detection device (D) were attached to opposite sides of the conveyance path of the conveyor (1), but the light emitting part (n+ ) and the light receiving section (D2) can be placed together in one place and attached to one side of the conveyor (1). FIG. 8 shows one embodiment thereof, which is advantageous when there is a space restriction on one side of the conveyance path.

That is, the light-emitting part (D1) and the light-receiving part (D2) of the photoelectric detection device (D) are attached to a single support (4), and are placed outside the guide pipe (2) on the opposite side across the conveyance path. A reflecting mirror (3) is provided, and a light emitting part (D1) and a light receiving part (D2) are provided.
The optical path between them is made to cross over the conveyor (1) and reciprocate. In this case, the light emitting part (n+),
Place the support (
4), and the light emitting part (D1) and the light receiving part (D2
) is provided in two stages, upper and lower, and accordingly, reflecting mirrors (3) are also provided in two stages, upper and lower. In addition, in each example, the light emitting part (D
1) The light receiving part (D2) is supported by the shaft (4), which is fixed to the rear adjustment wheel (4) so that the horizontal direction of the optical axis can be easily adjusted. It is.

Further, it is also possible to use a semiconductor light emitting element and a light receiving element for the light emitting part (D1) and the light receiving part (D2) in the above embodiment, and further, the light emitting part (n+
), when the light receiving section (D2) is combined, if a reflective sensor (reflective type light emitting/light receiving element) is used and a reflecting mirror is attached oppositely thereto, the device can be extremely miniaturized.

〔Effect of the invention〕

As is clear from the above description, according to the present invention, when a conveyed article such as a flat tire filled with liquid food is conveyed in an upright state on a conveyor, it is possible to reliably detect a conveyed article in a lying down state. This makes it possible to prevent mistakes in the next processing step, which greatly contributes to improving the efficiency of the production line for this type of conveyed articles.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 1 is a cross-sectional view of the main part showing a state in which the lodging detection device is attached to the transport path of a conveyor, FIG. 2 is a plan view of FIG. 1, and FIG. Figure 3 is a side view of the main parts of Figure 1 as viewed from A. Figure 4 is a view when the conveyed article passes in front of the light receiving part of the photoelectric detection device in an upright state. Figure 6 is a diagram when the conveyed article passes in front of the light receiving part of the photoelectric detection device in a lying down state, Figure 6 is a diagram when the conveyed article passes in a continuous state while blocking the optical path of the photoelectric detection device, and Figure 7 is a diagram when the conveyed article is continuously conveyed. FIG. 8 is a plan view of the main parts when the interval between the articles is wider than a predetermined interval. FIG. (1)---Conveyor, (21-Guide pipe, (
31 - Reflection mirror, (C) - Conveyed article, (D)
----One photoelectric detection device, (o+)'-light emitting part, (
Dz) - light receiving section.

Claims (1)

[Claims] 1. On the side of the conveyance path of the conveyor (1) that conveys the rectangular parallelepiped-shaped conveyed article (C), two upper and lower stages of photoelectric detection devices (D), (D) are installed. Its light emitting part (D_1) and light receiving part (
D_2) crosses the path of the conveyed article (C), and the light beam from the light emitting part (D_1) of the lower photoelectric detection device (D) crosses the path of the conveyed article (C).
Even when the object is in a lying down state, it is blocked by the lying conveyed article, and the light emitting part (D
When the transported article (C) is in a lying down state, the light beam from _1) is received by the light receiving part (D_2) and
) is arranged so that it is blocked only when it is in an upright state, and the difference in the light blocking signals from the upper and lower photoelectric detection devices (D), (D) allows the conveyed article (C) to be blocked on the conveyor (1). 1. A lodging detection device for conveyed articles on a conveyor, characterized by detecting lodging. 2. The light emitting part (D_1) and the light receiving part (D_2) of the photoelectric detection device (D) are arranged so that the light path between them is blocked by the conveyor ( 1) A toppling detection device for conveyed articles on a conveyor according to claim 1, wherein the device is disposed diagonally across the conveyance path of claim 1. 3. The optical path of the photoelectric detection device (D) is connected to the conveyor (1)
A light emitting part (D_1) and a light receiving part (D_2) are installed on both sides of the transport path.
3. A toppling detection device for conveyed articles on a conveyor according to claim 1 or 2, characterized in that the device is formed by arranging and facing each other. 4. The optical path of the photoelectric detection device includes a light emitting section (D_1) and a light receiving section (D_2) provided on one side of the conveyance path of the conveyor (1).
), and a reflecting mirror (3) is disposed opposite to the light emitting part and the light receiving part with a conveyance path of the conveyor (1) in between. 2. A device for detecting a fall of conveyed articles on a conveyor according to item 2. 5. Conveyance on a conveyor according to claim 4, wherein the light emitting part and the light receiving part provided on one side of the conveyance path of the conveyor (1) are integrally formed reflection type light emitting/light receiving elements. Equipment for detecting the lodging of objects.