JPH03223016A - Detector of transporting material - Google Patents

Abstract

PURPOSE:To simply and surely detect even commodities of different dimensions with a detector of transporting material such as hot formed ring-shaped commodities by providing it with a detecting bar whose lower end contacts a work on a shoot and swings whose shielding plate provided at its upper end shields the light between a light projector and a light interceptor. CONSTITUTION:When the material at the most rear part of materials W sent onto a shoot 3 passes a detecting bar 7 and stays, the lower end of the detecting bar 7 is pushed upward by the material W while a supporting bar 9 swings to the right direction in the attached drawing to insert a shielding plate 8 between a light interceptor 11 and a light projector not shown in the drawing and shut off a light, thereby stay of the material W is detected and supply of material is temporarily stopped. When the stay is gone, the detecting bar 7 swings downward, the shielding plate 8 withdraws from the light shielding position to resume material supply. Because of this constitution, materials whose sizes are different can be surely detected with simple construction.

Description

DETAILED DESCRIPTION OF THE INVENTION The above invention relates to a detection device for a conveyed material such as a ring-shaped hot-formed product.

For example, when a ring-shaped material that has been primarily processed by hot forging is subjected to secondary processing such as cold rolling, the material is transferred from the supply section of the primary processing section to the secondary processing section. It is extremely important to control the supply so that there is no excess or deficiency.

For this reason, conventionally, between the primary processing section and the secondary processing section, a trough-like inclined chute is installed to continuously roll and feed the material in a line from the supply section of the primary processing section. A detection device is known that is provided with a pair of light emitters and receivers that are installed at a predetermined position to detect the material being conveyed on the chute.

The light emitter/receiver 10a, 10b is simply a chute 3a.
If they are arranged in a direction perpendicular to the transport direction of the material W so as to sandwich the material W, since the material W is ring-shaped, the light from the projector 10a will pass through the ring even if the material W is present.
For fear that undetectability may occur, it is installed at an angle (for example, 30°) to the transport direction of the material W to prevent undetectable failure (Fig. 4).

While the light receiver 10b is receiving light from the light projector 10a, the material is sent from the supply section of the primary processing section to the secondary processing section, while the light projector 10a is receiving light from the light projector 10a.

There is a material W on the chute 3a where 10b is located, and the receiver 1
When 0b is no longer able to receive light from the light projector 10a, a motor for a material supply conveyor that receives a signal from the light receiver 10b, for example, is controlled to stop and stop feeding the material W from the supply section. .

However, in the conventional detection device described above, the emitter and receiver are installed at an angle to correspond to the shape of the material, and although certain measures have been taken, the installation position is fixed, so it is difficult to When transporting materials, even if the material is on the chute with the emitter and receiver, the receiver may receive the light from the emitter, resulting in failure to detect.
There was a problem in that the installation position of the light emitter and receiver had to be changed depending on the size of the material.

Therefore, the present invention solves the above-mentioned conventional problems, and can reliably detect materials of different sizes without being so limited by the size of the material, and does not require the trouble of changing the installation position of the light emitter and receiver. The purpose of the present invention is to provide a detection device for conveyed materials that does not require additional work.

In order to achieve the above-mentioned object, the present invention provides a swinging device which faces an inclined chute from above and has a detection bar at the lower part that can come into contact with the material being sent on the chute, and has a shielding plate at the upper part. The member is pivoted to the machine frame so that the detection bar is always biased against the material.

Furthermore, a pair of light emitters and receivers are provided on the machine frame, sandwiching the shielding plate so that the light from the light emitter can be shielded by the shielding plate.

Stop--1 When the detection bar is in contact with the material being sent on the chute, the light from the projector is blocked by the shielding plate and cannot be received by the light receiver.

On the other hand, when the detection bar is not in contact with the material, the swinging member swings in the force direction, so that the light from the projector is not blocked by the shielding plate and is received by the light receiver.

The material is detected depending on whether or not the light receiver receives light.

In FIG. 1, reference numeral 1 denotes a machine frame in which a rectangular through hole 2 is formed, through which an inclined chute 3 is supported. The chute 3 is shaped like a gutter so that a plurality of ring-shaped materials W can be continuously transferred and fed in one line by their own weight, and in Fig. 1, from the right side where the material supply section is located to the left side. It is arranged slanting downward.

A pivot shaft 4 is rotatably supported at both ends on the machine frame 1 above the chute 3 and is rotatable across the through hole 2 in a direction perpendicular to the chute 3. A boss portion 6 of the swinging member 5 is fixed to an intermediate portion of the swing member 5 . A detection bar 7 in the shape of a round bar, which faces the chute 3 from above and comes into contact with the material W fed on the chute 3, is fixed to the boss portion 6 while being bent in the feeding direction of the material W. The shielding plate 8 for the light emitter and receiver, which will be described later, is a round support bar 9.
It is biased and fixed in the feeding direction of the material W via.

Due to this deflection of the shielding plate 8, the swinging member 5 is biased to swing so that the detection bar 7 always comes into contact with the material W.

10.11 is 1 installed on machine frame 1 via a bracket.
When the detection bar 7 is not in contact with the material W being sent over the chute 3 in the paired light projector/receiver, the light from the light projector 10 is not blocked by the shielding plate 8 and can be received by the light receiver 11; When the bar 7 is in contact with the material W, the projector 10
The light from the front is blocked by a shielding plate 8.

Next, the operation of the above embodiment will be explained.

The material W that is continuously sent from the supply section onto the chute 3 is
When the material at the rear end exceeds the detection bar 7 and stays, the detection bar 7 comes into contact with the material W as shown in FIG. Vessel 1
1, it becomes impossible to receive light. As a result, upon receiving the stop signal from the light receiver 11, the supply section, for example, a motor for a material supply conveyor, is stopped, and the feeding of the material from the supply section is temporarily stopped.

The feeding of the material W progresses, and the last material W is detected by the detection bar 7.
3, the swinging member 5 swings as shown by the arrow in FIG. Vessel 11
It becomes possible to receive light. As a result, the stop signal is released, the conveyor is driven, and the material W from the supply section is released.
supply will resume.

When the supplied material W passes through the detection bar 7, the bar is pushed up to swing the swinging member 5 in the direction opposite to the arrow in FIG. At 8, the light from the projector 10 is blocked.

In this way, each time the material W passes through the detection bar 7, the material W is detected by the light emitter/receiver 10.11 via the shielding plate 8 that interlocks with the detection bar 7, and the material supply from the supply section is controlled. be.

In this embodiment, a ring-shaped material with a constant diameter is shown as the material W, but even if materials with different diameters are sent randomly, the size and area of the shielding plate 8 can be adjusted in advance within the allowable range of the material W. It can be sufficiently detected by assuming that

Further, the shape and structure of the swinging member 5 such as the detection bar 7 and the shielding plate 8 are merely an example, and the detailed design of the present invention may be variously changed within the scope of the gist of claim 1. is possible.

1122 Since this invention has the above-mentioned configuration, it is possible to reliably detect materials of slightly different sizes, and in doing so, there is no need to change the installation position of the light emitter and receiver as in the past. This has an excellent effect in that the extra time conventionally required for position adjustment can be omitted, and the material can be detected with extremely high efficiency in the material feeding control system.

4,

[Brief explanation of drawings]

FIG. 1 is a perspective view showing an embodiment of the present invention, FIGS. 2 and 3 are action explanatory views, and FIG. 4 is a schematic plan view showing a conventional example. 1... Machine frame 2... Machine frame 3... Inclined chute 4
... Pivot shaft 5 ... Swinging member 6 ... Boss part 7.
...Detection bar 8...Shielding plate 10...Floodlight 11
...Receiver W...Material

Claims (1)

[Scope of Claims] 1. A conveyed material detection device comprising a trough-like inclined chute that continuously rolls and feeds a plurality of ring-shaped materials in a line from a supply section by its own weight, comprising: The swinging member has a detection bar at the bottom that faces from above and can come into contact with the material being sent on the chute, and has a shielding plate at the top, and is biased so that the detection bar always comes into contact with the material. and a pair of light projectors and receivers are provided on the machine frame, sandwiching the shielding plate so that the light from the projector can be shielded by the shielding plate. A detection device for conveyed materials.