JPS629202Y2 - - Google Patents

Description

[Detailed explanation of the idea] [Industrial application field]

The present invention relates to a photoelectric control device for controlling the lifting and lowering operation of a so-called arch horizontal packaging machine by detecting an obstacle that obstructs the lifting and lowering of the arch.

[Technical background]

The arch horizontal packaging machine connects the main body to a drive winding mechanism via a wire rope, chain, etc., supports the main body on a guide pole so that it can be raised and lowered, and has a band guide arch in the horizontal direction with respect to the main body. The arch lowers one step or several steps to wrap the items on the conveyor line by wrapping one or more bands horizontally, and then rises to wrap the items on the conveyor line from below the arch. It makes them move. In order to do this, the items to be packed must be completely enclosed within the four sides consisting of the three inner edges of the arch and the front side of the main body. The state of the packaged items placed on the
Or, due to load collapse, etc., the lifting arch and/or a part of the main body came into contact with the packaged items, resulting in damage to the packaged items, the arch, etc.

[Prior art and problems]

In order to prevent such a situation, one side edge of the fence-like rod 2 is conventionally supported below the arch as shown in FIG.
A detection device has been proposed in which the limit switch 3 is actuated by the fence-like rod 2. According to this type of conventional means, since there are at least three sides just under the arch, a similar mechanism must be provided on each side, resulting in a complicated mechanism, and the fence-like rod 2 hangs over the entire area under the arch. As a result, the objects to be packed that move back and forth into the arch come into contact with the fence rods 2, which may cause damage to the fence rods, the arch, or the objects to be packed, or malfunction of the limit switch, resulting in low reliability. Ta.

【the purpose】

The present invention was developed in order to eliminate the drawbacks of the prior art, and its purpose is to eliminate the need for a single photocell tube without providing any obstructive member on the lower surface of the arch through which the objects to be packaged pass. The rays of light are reflected (refracted) by reflective members, such as mirrors or prisms, provided near the corners of the three sides of the arch, and obstacles below the arch (and the front of the main body) are detected, and the elevation of the arch is controlled. It's about trying.

【composition】

In order to achieve the above purpose, in this invention,
Reflective members are attached near the corners of the three sides of the arch, so that the light beam from the phototube passes directly below the three sides of the arch, and the control circuit of the phototube is connected to the elevating drive mechanism of the main body. In this case, if an obstacle exists below the arch, the phototube issues a detection signal to stop the lifting mechanism of the main body.

【Example】

The details will be explained below according to the illustrated embodiment. FIG. 2 is an explanatory diagram of the principle of the control device of the present invention, in which the beam L from the projector 10 is directed to three corner positions of a rectangular plane formed on the same plane in the space, and reflected by mirrors 11, 12, and 13, respectively. are arranged with their opposing surfaces at right angles to reach the light receiver 14. In the above description, a so-called transmission type phototube is used, but it is also possible to use a reflection type phototube for the projector 10 and a reflection mirror for the light receiver 14. Furthermore, it is also optional to replace the reflecting mirror with a prism. FIG. 3 shows an embodiment of the present invention, in which the reflecting mirrors 11, 12, and 13 are fitted into a holder 20, although detailed illustrations are omitted, and the holder 20 is appropriately connected to the same length. The pillar 21 is fixed to the lower surface of the arch 15 via a universal joint. The holding body 20 changes its position due to impact, and the arch 15 is arranged so that it returns to its original position.
After a spring with one end fixed to the support 21 is inserted into the column 21, the other end of the spring is fixed to the holder 20, and the spring is supported and fixed to the arch 15 like a rearview mirror of an automobile. Needless to say, the mirror surfaces of each of the reflecting mirrors are provided at even angles on two sides of the arch so that the facing angle is 90 degrees. Further, the projector 10 and the receiver 14 are mounted on the other even-angled lower surface of the arch 15 at an angle of 45 degrees with respect to the reflecting mirrors 11 and 13, respectively, and can be rotated and folded by 360 degrees via the pillar 21 like the reflecting mirrors. Freely fix the song. In addition, the third reflecting mirror 13
The light receivers 10 and 14 are installed in the main body B and are provided so as to project, reflect, or receive the light beam from an appropriately sized hole drilled in the front surface of the main body B, so that the detection range is only below the three sides of the arch. is also possible. As is well known, the control device consists of a power supply circuit and a control circuit that amplifies the output from the light receiver using a transistor electronic circuit and operates an electromagnetic relay.The electromagnetic relay is turned on and off by intermittent light. Controls the operation of a drive mechanism that moves the arch 15 up and down inside or outside the arch. Additionally, in this embodiment, a 5 cm square reflecting mirror and a 10 m transmission type phototube are used. The present invention consists of the above-mentioned structure, and the operation of the above-mentioned embodiment will now be explained. When the arch 15 descends together with the main body so as to surround the object being transported on the conveyor line and stopped at a position below three sides of the arch 15, the arch 1
If there is an object to be packed or an obstacle below the four sides formed by 5 and the front of the main body B, this obstacle blocks the light beam of the phototube and causes the control circuit to blink a signal light or emit a signal sound, and is connected to the control circuit. A signal is output to the elevating drive mechanism of the main body to stop the operation of the drive mechanism, and at the same time, the brake of the winding mechanism is activated, so that the main body of the arch 15 is stopped before it collides with an obstacle or the like. After the packing is completed, the horizontal arch 15 rises, but if the load is dislocated during packing and this obstructs the arch from rising, the phototube detects this and similarly stops the movement of the arch.

【effect】

As described above, the present invention is an arch horizontal packaging machine equipped with a band guide arch horizontally installed on a main body which is connected to a drive mechanism and is movable up and down. A reflective member was attached so that the light rays from the phototube would pass directly below the three sides of the arch, and the control circuit of the phototube was connected to the lifting mechanism of the main body, so there would be no obstruction to the underside of the arch through which the items to be packaged would pass. With a very simple structure that uses phototubes and reflective members attached near the corners of the three sides of the arch, the arch or the items to be packaged can be This is an extremely useful control device for lifting and lowering the arch, which can prevent accidents that could cause damage to the arch, and maintain work safety.

[Brief explanation of the drawing]

Fig. 1 shows a conventional control device, and Figs. 2 and 3 show embodiments of the control device of the present invention.
The figure shows the basic structure, and FIG. 3 is a perspective view of an arch horizontal packaging machine equipped with the device of the present invention. 1... Arch, 2... Fence-like rod, 3... Limit switch, 10... Emitter, 11-13... Reflector, 14... Light receiver, 15... Arch, 20...
Holding body, 21... Support, B... Main body, L... Light beam.

Claims (1)

[Claims for Utility Model Registration] (1) In an arch horizontal packaging machine comprising a band guide arch horizontally installed on a main body which is connected to a drive mechanism and is movable up and down, the corner portions of three sides of the arch An arch horizontal packaging machine characterized in that a reflective member is attached nearby, the light beam from the phototube is provided to pass directly below the three sides of the arch, and the control circuit of the phototube is connected to the lifting mechanism of the main body. Obstacle detection device. (2) An obstacle detection device for an arch horizontal packaging machine according to claim 1, wherein the phototube emitter and receiver are installed in the main body.