JP2006044118A - Security equipment - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain predetermined operating performance of stopping rotation of a pair of rolls in case of an emergency while enabling an operation of supplying rubber on a pair of the rolls and an operation of pushing away the rubber to the supplying portion formed between a pair of the rolls. <P>SOLUTION: In the safety device arranged in the rubber roll machine with a pair of the rolls 1 each having a horizontal rotary shaft onto which the rubber G is supplied from the upper side, the supplying portion A formed between the top portions 1a of a pair of the rolls 1 is set as a dangerous area, and a detecting means 2 detecting the situation of the dangerous area is arranged on the side along the shaft lines of a pair of the rolls 1. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a security device, and more particularly, to an improvement in a security device suitable for implementation in a rubber roll machine that forms a rubber sheet by rolling a soft lump of rubber with a pair of parallel rolls.

  In a rubber roll machine that forms a rubber sheet by rolling a soft lump-like rubber with a pair of rolls rotating in the so-called winding direction with the rotation axis parallel to the horizontal direction, the rubber is settled on the pair of rolls. In other words, in order to prevent soft rubber from falling from a so-called spilling portion from a charging portion having a substantially funnel-shaped cross section between the tops of a pair of rolls, the operator pushes the rubber to the charging portion by hand. There are things to do.

  At this time, in order to avoid the occurrence of an accident in which the operator's hand is sandwiched between the pair of rolls, a security device that makes it possible to urgently stop the rotation of the pair of rolls is disclosed in Patent Document 1, for example. It is disclosed.

  That is, the security device disclosed in Patent Document 1 is such that a color difference check type phototube is installed above a feeding portion formed between a pair of rolls, and this color difference check type phototube is detected. Based on the above, the motor rotating the pair of rolls is stopped.

Therefore, according to this proposal, the worker's hand enters the above-mentioned input section by engaging the work with a glove having a color complementary to the color of the rubber, for example. Sometimes, the color difference check type phototube detects this, and the rotation of the pair of rolls can be stopped.
Japanese Patent Laid-Open No. 48-46956 (Claims, specification, page 2, left column, lines 5 to 12, line 1)

  However, in the above proposal, it may be pointed out that this cannot be realized depending on the structure of the rubber roll machine.

  That is, in the rubber roll machine, when the rubber put on the pair of rolls is configured to drop from above the feeding portion, the above color difference check type photoelectric tube is placed above the pair of rolls. , It becomes difficult to arrange it above the charging part.

  When the color difference check type phototube is disposed so as to avoid interference with devices that drop the rubber onto a pair of rolls, the color difference check type phototube is operated normally. There is a risk that it will be difficult to put an accurate detection operation into practice, and it will not be possible to expect a predetermined operating performance in the security device.

  The present invention has been made in view of such a current situation, and the object of the present invention is to provide a rubber charging operation on a pair of rolls and a charging portion formed between the pair of rolls. Not only does this impede the work of pushing the rubber, but it is also optimal for expecting an improvement in versatility for the rubber roll machine, as it provides a predetermined operating performance that stops the rotation of the pair of rolls in an emergency. It is to provide a security device.

  In order to achieve the above-described object, the structure of the security device according to the present invention is a security device distributed in a rubber roll machine in which rubber is poured from above onto a pair of rolls whose rotating shafts are arranged in parallel in the horizontal direction. In addition, it is assumed that the input portion formed between the tops of the pair of rolls is set as a dangerous area, and detection means for detecting the situation in the dangerous area is arranged on the side along the axis of the pair of rolls.

  Therefore, in the present invention, since the detecting means is disposed on the side along the axis of the pair of rolls, the rubber is pushed to prevent the rubber from falling on the pair of rolls. Of course, it does not hinder the operation of making it so that the operation of dropping the rubber onto the pair of rolls from above is prevented.

  And in this invention, since a detection means detects the condition in the danger area | region which is a throwing part formed between a pair of rolls, an operator's hand may overlap with the movement of the rubber | gum in said throwing part. It is possible to detect the moving situation.

  At this time, the detection means visualizes the situation in the dangerous area and outputs a signal based on the imaged position to the control unit, and the control unit rotates a pair of rolls based on the input signal. By controlling it, it is possible to automatically stop the rotation of a pair of rolls in an emergency, as well as monitoring by the supervisor, etc., to further enhance security. The effect can be improved.

  As a result, according to the security device of the present invention, it is possible to perform the operation of charging rubber onto the pair of rolls and the operation of pushing the rubber toward the charging portion formed between the pair of rolls. A predetermined operation performance for stopping the rotation of the pair of rolls in an emergency can be obtained, which is optimal for expecting improvement in versatility for the rubber roll machine.

  Hereinafter, the present invention will be described based on the illustrated embodiment. As shown in FIGS. 1 and 2, the security device according to the present invention is a pair of rotating shafts (not shown) arranged in parallel in the horizontal direction. It is embodied in a rubber roll machine in which a rubber G (see FIG. 2) is fed from above onto the roll 1, that is, between the tops 1 a of the pair of rolls 1 and having a substantially funnel-shaped cross section. Yes.

  At this time, the rubber roll machine is configured to synchronously rotate the pair of rolls 1 by driving a drive source such as a motor (not shown). The rotation direction of the pair of rolls 1 is basically indicated by an arrow in FIG. It is assumed that the so-called entrainment direction is set, and further, the reverse direction when necessary.

  Further, in this rubber roll machine, the pair of rolls 1 are exaggerated in the figure, but they can be brought close to each other with an appropriate gap S, or one roll 1 is the other. In other words, the thickness of the rubber sheet extruded downward can be selected by controlling the width S of the gap S.

  By the way, in this type of rubber roll machine, in many cases, a switch that enables an emergency stop of the rotation of the roll 1 is provided at a plurality of locations, that is, near the operator's feet and the operator's overhead, Although it is assumed that it is provided on the left and right sides where the worker's hand can reach, the security device of the present invention can operate the rubber roll machine even if the operator may not be able to press the switch. Is proposed to enable emergency stop.

  By the way, with respect to the embodiment of the security device according to the present invention, in the rubber roll machine, the above-described feeding portion A formed between the pair of rolls 1 is set in the dangerous area, and the situation in this dangerous area is detected. In other words, the detection means 2 for detecting the state in which the gloves worn by the worker are present in the input portion A is arranged on the side along the axis of the pair of rolls 1.

  At this time, the setting of the dangerous area is between the top portions 1a of the pair of rolls 1 serving as the input portion A, but the worker who is engaged in the work with the rubber roll machine is shown in FIG. 1 and FIG. Since it approaches the roll 1 on the front side on the right side, the danger area may be all made from the top 1a of the roll 1 on the front side toward the far side where the hand is gradually out of reach. is there.

  Since the detection means 2 is arranged on the side along the axis of the pair of rolls 1, an operation that is performed by an operator so that the rubber G on the pair of rolls 1 does not fall down, that is, The operation of pushing the rubber G toward the charging portion A is not obstructed, and the operation of dropping the rubber G onto the pair of rolls 1 from above is not obstructed.

  Further, the detection means 2 may be of any configuration as long as it detects a state where a glove is in the throwing section A. In this embodiment, although not shown, the detection means 2 displays the situation in the dangerous area as an image. And a signal based on the imaged portion is output to the control unit.

  Although not shown in the figure, the control unit can automatically stop the rotation of the pair of rolls 1 in the event of an emergency by controlling the drive source that rotates the pair of rolls 1 based on the input signal. If so.

  By the way, by visualizing the situation in the dangerous area, it becomes possible for a supervisor or the like to directly monitor the visualized place. In addition to the automatic control through the control unit described above, it is said that people It is possible to prevent the rotation of the roll 1 by a manual operation, and to further improve the security effect.

  By the way, for visualizing the situation in the dangerous area, it is preferable to use, for example, a CCD color camera. In this case, the discrimination ability is excellent as compared with the case of a conventional monochrome camera. .

  As a result, for example, compared to the case where it is required to select a glove having a color complementary to the color of the rubber G or a color similar to the complementary color as disclosed in Patent Document 1 described above, A wide variety of identification detections such as being not essential to be in a complementary color relationship are possible, which is advantageous.

  Next, in principle, the arrangement position of the detection means 2 may be any side along the axis of the pair of rolls 1, but more precisely, the side along the axis of the pair of rolls 1. However, it is positioned above the top portion 1a of the roll 1 and is arranged so that the danger area set on the pair of rolls 1 can be seen from a so-called diagonally upward direction.

  At this time, it is assumed that the detection means 2 shown in the figure is arranged on both sides of the pair of rolls 1 along the axial line so that the dangerous areas in the pair of rolls 1 can be simultaneously detected from the left and right. Is preferred.

  However, the present invention is intended not to detect the dangerous area from above the pair of rolls 1 but from the side along the axis of the pair of rolls 1, so that the detection means 2 is so-called. It is not necessarily required to be distributed to the left and right.

  As described above, the detection means 2 is positioned on both sides of the pair of rolls 1 while being on the sides along the axis of the pair of rolls 1, so that the situation in the dangerous area can be effectively obtained. It can be detected.

  At this time, in order to make the detection by the detection means 2 more accurate, it is preferable that the detection atmosphere is not affected by light in the surrounding atmosphere, for example, a dedicated space defined as the surroundings. It would be easiest to provide a predetermined sensing atmosphere inside.

  However, providing a detection atmosphere in a dedicated space defined with the surroundings will lead to an increase in the size of the equipment, so that a pair of illuminances exceeding the ambient illuminance of the rubber roll machine as shown in the embodiment shown in the drawing. It can be said that it is preferable that the illumination means 3 for illuminating the dangerous area on the roll 1 is provided.

  The provision of the illumination means 3 is intended by the present invention to reveal a predetermined illuminance atmosphere. Therefore, as long as a predetermined illuminance atmosphere can be obtained, for example, the detection means 2 and Similarly, they may be arranged on the left and right sides, and may be arranged only on either the left or right side.

  As described above, when the security device according to the present invention is embodied in a rubber roll machine, the rubber G is charged into the charging portion A formed between the pair of rolls 1 and the pair toward the charging portion A. Of course, it is possible to push the rubber G on the roll 1, and when the detection means 2 detects that the glove worn by the worker has entered the dangerous area as the input portion A, the rotation of the roll 1 It becomes possible to stop.

  In view of the above, in the security device according to the present invention, the detection means 2 is arranged on the side along the axis of the pair of rolls 1 in the rubber roll machine. This is suitable for realizing a rubber roll machine having a structure in which the rubber G is dropped on the roll 1 from above.

  That is, when the rubber roll machine is thrown onto the pair of rolls 1 to drop the rubber G from above, when the rubber G is dropped, a switch for emergency stop near the so-called overhead of the operator is set. There is a risk of malfunction.

  Therefore, in the rubber roll machine configured to drop the rubber G from above the roll 1, no emergency stop switch is provided near the operator's head. The number of places depending on the apparatus increases, and a desired rotation stop operation in the roll 1 can be realized without an emergency stop switch near the overhead.

  The above is the basic configuration and operation of the security device according to the present invention. In the illustrated embodiment, the following consideration is given.

  That is, first, in the pair of rolls 1 in the rubber roll machine, an area that is out of the danger area as the input portion A described above is set as a work area (not shown), and the detection means 2 determines the situation in this work area. It is also supposed to detect.

  This is because if the detection means 2 is set to detect only the situation in the dangerous area, objectively, until the glove worn by the operator enters the dangerous area, The situation will not be understood.

  In this regard, in the proposal disclosed in Patent Document 1 described above, when a predetermined color difference check is practiced using a color difference check type phototube, driving of the motor is stopped and rotation of the roll is stopped. Therefore, even when the gloves worn by the worker are in the work area instead of the danger area, there is a concern that the rotation of the roll is stopped as long as the color difference check is practiced.

  On the other hand, when it is set that the state of the work area can also be detected by the detection means 2, first, although it has not yet entered the danger area, if the glove worn by the worker is moved as it is, the danger area Therefore, it is possible to foresee the possibility of the operator's hand entering the dangerous area, and this is advantageous in that the safety can be improved.

  When the state in the work area is also detected by the detection means 2, for example, it is possible to perform control without stopping the rotation of the roll 1 only by emitting a warning sound. In the operation of manually pushing toward the charging unit A, the rotation of the roll 1 is not unnecessarily stopped.

  In the above description, the case where the detecting means 2 is composed of a CCD color camera has been described as an example. However, the place where the detecting means 2 functions, that is, the place intended by the present invention is approximately on a pair of rolls 1. By detecting this when the operator's hand wearing gloves enters the dangerous area to be set, it is possible to stop the rotation of the roll 1 through the control unit. Therefore, it is needless to say that the rotation of the roll 1 may be stopped when the plurality of optical sensors arranged on the side detect.

  In the above description, the security device according to the present invention is embodied in a rubber roll machine. However, it has a dangerous area, and it is predicted that gloves worn by an operator will enter this dangerous area. Of course, it will be possible to implement such a machine device.

It is a top view which shows notionally the rubber roll machine which embodied the security device by this invention. It is a side view with respect to FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Roll 1a Top part 2 Detection means 3 Illumination means A Input part G Rubber S Gap

Claims (5)

It is a security device distributed in a rubber roll machine in which rubber is thrown from above onto a pair of rolls whose rotating shafts are arranged in parallel in the horizontal direction, and the throwing portion formed between the tops of the pair of rolls is set as a dangerous area And a security device for detecting a situation in the dangerous area, which is arranged on a side along the axis of the pair of rolls. The detection means images the situation in the dangerous area and outputs a signal based on the imaged position to the control unit, and the control unit controls the drive source for rotating the pair of rolls based on the input signal. The security device according to claim 1 The security device according to claim 1 or 2, wherein the detection means is provided with illumination means for illuminating the dangerous area of the pair of rolls with an illuminance that exceeds the illuminance around the rubber roll machine. The area in which the input portion formed between the pair of rolls is removed from the work area, and the situation in the work area is detected by the detecting means. The security device described 5. The security device according to claim 1, wherein the detecting means is disposed on both sides along the axis of the pair of rolls.

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