JP4583585B2 - Long endless toothed belt manufacturing apparatus and number of teeth counting method - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an apparatus for manufacturing a long endless toothed belt made of a seamless thermoplastic elastomer and a method for counting the number of teeth, and more specifically, a long length that guarantees the number of teeth formed by providing a function for counting the number of teeth in the molding apparatus. The present invention relates to an endless belt manufacturing apparatus and a tooth count counting method.
[0002]
[Prior art]
Regarding the belt tooth number measuring device, there are techniques described in Japanese Patent Laid-Open Nos. 4-71832 and 6-337972. First of all, these devices are used in the former to cut open-end type long urethane belts made in a strip shape with a predetermined number of teeth, and forgetting to count errors or forgetting counts in manual measurement in the endless manufacturing method. Correspondingly, the measurement time has been shortened and a significant reduction in man-hours has been achieved.
[0003]
Next, the latter improves the problem of the counting pulley type that needs to be replaced for each tooth size and tooth type with respect to the above-mentioned technique, and all the teeth of the toothed belt are placed at the light projecting position of the optical sensor. It is intended to easily pass through and to easily measure the number of teeth of all types of toothed belts without replacement of equipment parts.
[0004]
That is, in these devices, the former requires a dedicated measuring device, and it is difficult to cope with an endless toothed belt. In the latter case, there is a difficulty in detection of a small tooth profile and a wide toothed belt that can be detected by an optical sensor, and there is a problem that adjustment of setting conditions is required for determination of all tooth profiles of different sizes.
[0005]
In addition to the length of endless belts and the diversification of tooth width types, the replacement of the object to be inspected involves man-hours loss, and in the manufacture of long products, the number of teeth counted exceeds 1000. In addition, there is a problem that it takes a long time to count on the high reliability that one tooth can be counted reliably.
[0006]
[Problems to be solved by the invention]
An object of the present invention is to form the number of teeth of a long endless toothed belt having an endless belt having an arbitrary circumferential length suitable for conveyance with a long interval between two axes, in a preceding process, without manual operation. It is an object of the present invention to provide an apparatus and a method for ensuring product warranty by automatically counting in the process.
[0007]
[Means for Solving the Problems]
That is, in the apparatus for producing a long endless toothed bed according to claim 1 of the present application, a pair of toothed molds comprising a molded toothed mold and an extended toothed mold, and a core wire between the molds Spinning mechanism that spirally winds at a pitch, a steel band that forms a rotating tooth shape in pressure contact with a molded tooth mold, and an extrusion that fills the cavity between the molded tooth mold and the steel band with molten thermoplastic elastomer In an apparatus for producing a long endless toothed bed composed of a machine,
Between the pair of toothed molds, there is provided a detector for detecting the start and end of counting based on the presence or absence of a mark on the surface of the belt tooth portion and a means for counting the number of molded teeth.
[0008]
According to this, special moving means for moving the toothed belt in the length direction is unnecessary, and the toothed belt can be moved with high accuracy. Therefore, a dedicated tooth number measuring machine is not required. In particular, it is effective when the interaxial distance between the pair of toothed molds is increased.
[0009]
In the apparatus for producing a long endless toothed bed according to claim 2 of the present application, the means for counting the number of molded teeth counts a displacement detector for discriminating one tooth in the tooth surface height direction, and a discrimination value. It consists of a counter.
[0010]
According to this, the tooth surface of every belt having different thicknesses, tooth heights, tooth pitches, etc. of the toothed belt is detected and grasped by the corrugated waveform, and the discrimination level of one tooth is previously determined as the tooth height. Therefore, it is possible to make an automatic counting mechanism with high accuracy and high reliability.
[0011]
In the long endless toothed belt manufacturing apparatus according to claim 3, the means for counting the number of molded teeth supports a toothed belt (detected body) that circulates between the pair of toothed molds in a loop shape. It has the means to do.
[0012]
According to this, in detecting the displacement value of the belt tooth surface height, it is indispensable for preventing the movement fluctuation of the belt to be measured and improving the detection accuracy.
[0013]
In the manufacturing apparatus for a long endless toothed belt according to claim 4 of the present application, the means for supporting the toothed belt that circulates between the pair of toothed molds in a loop shape is a tooth of the counting means for detecting the number of molded teeth. It is a rotary roll body located on the back of the attached belt.
[0014]
According to this, it is possible to easily and reliably prevent the run-out during the traveling movement with respect to the belt having a smooth back surface of the toothed belt.
[0015]
Regarding the method for counting the number of teeth of a long endless toothed belt according to claim 5 of the present application, a pair of toothed molds comprising a molded toothed mold that forms a tooth shape and an extended toothed mold that defines a predetermined interaxial distance. The distance between the axes is set in advance, the core wire is spirally wound at a predetermined pitch, the molded toothed mold is pressed with a steel band and rotated in a rotating state, and the cavity between the molded toothed mold and the steel band is formed. In a method of manufacturing a long endless toothed belt in which a filled thermoplastic elastomer in a molten state is compression-molded and cooled and cured to form a predetermined tooth profile shape , a mark is attached before the counting is started, The detector at the position detects and changes to a count start and count end signal, and the displacement detector determines one tooth in the tooth surface height direction, and cumulatively counts the number of teeth from the start to the end of counting, tooth It is characterized in that having the step of counting.
[0016]
According to this, counting inspection in a post process can be advanced, man-hours can be shortened, and production lead time can be shortened. Further, it is not necessary to replace the belt for counting, the counting man-hours can be eliminated , and furthermore, a highly accurate and reliable measuring device for the number of teeth of any toothed belt can be realized.
[0019]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the manufacturing apparatus and tooth number counting method of a long endless toothed belt according to the present invention will be described in detail with reference to FIGS. FIG. 1 is a partial perspective view of a long endless toothed belt, FIG. 2 is a schematic view showing a manufacturing process of a long endless toothed belt, FIG. 3 is a detailed front view of a tooth number counting unit according to the present invention, and FIG. 5 is a detailed plan view of a tooth number counting unit according to the present invention, FIG. 5 is a schematic view for detecting the displacement of the tooth height according to the present invention and displaying the waveform, and FIG. 6 is a front view of the long endless toothed belt manufacturing apparatus. .
[0020]
First, the terms used repeatedly will be easily understood, and the molding side will be referred to as A and the extension side as B. For example, a molded tooth mold disposed on both sides is called an A tooth mold, and an extended tooth mold is called a B tooth mold. Further, in the following description, the long endless toothed belt 1 manufactured will be supplemented. This product has an annular and seamless shape, and the standard dimension has a maximum circumference of around 20 meters, a width of 7 to 100 mm, and a tooth pitch of 5 to 20 mm. FIG. 1 is a cross-sectional cut of the circumference and width. There is a back surface portion 1a that contacts the outer surface of the belt and a tooth portion 1b that is a meshing transmission surface. It is obtained by covering and forming the thermoplastic elastomer 5 on the belt structure 9 in which the core wire 1c is spirally wound and cutting the width.
[0021]
First, the whole long endless toothed belt manufacturing apparatus will be described with reference to FIG. That is, this apparatus includes a pair of toothed molds 2a and 2b composed of a rotation drive and extension mechanism, a tension adjuster 24, a spinning mechanism 8 for winding the core wire 1c to produce the belt structure 9, and an A toothed The steel band 6 provided with a rotating and extending mechanism that circumscribes the outer periphery of the mold 2a and presses and rotates, and the thermoplastic elastomer 5 melted by the extruder is converted into a flat resin flow and supplied to the A toothed mold 2a. It is an apparatus composed of the nozzle 7 of the machine.
[0022]
As shown in the figure, each of the above-mentioned elements is slidably disposed on the upper surface of the molding part base 22 and the extension part base 23 as an airframe bed, and both bases 22 and 23 are provided with a pair of toothed molds 2 horizontally. In addition, the belt molding rotational core level is matched and connected and fastened. In the case of a longer product, the extension base 23 can be made longer.
[0023]
On the machine side (not shown) of the gantry 22 and 23, various electric control panels, bobbin racks in which the core wire 1c is wound in a roll shape, an extruder for melting the thermoplastic elastomer 5, and an A toothed mold 2a A temperature controller that adjusts the temperature and a lifting machine that replaces each toothed mold 2a, 2b are provided.
[0024]
The pair of toothed molds 2 is manufactured with the same size and the same number of teeth according to the tooth profile of the molding belt. The A and B toothed molds 2a and 2b are controlled by synchronous rotation.
[0025]
The spinning mechanism 8 is disposed so as to face the B-tooth mold 2b as shown in FIG. The core wire 1c is drawn out from a rear core wire bobbin stand (not shown), guided to a guide roll 20 having a lateral feed mechanism through a tension adjuster 24, and a predetermined number of times between a pair of rotating toothed molds 2, It is wound spirally at a constant tension and a constant pitch.
[0026]
Further, the steel band 6 is wound around the guide rolls R1, R2 and the extension roll R3, and the extension roll R3 is retracted by the hydraulic cylinder 40 and extended to a predetermined tension. It is always waiting for retreating except during molding, and is moved forward to a predetermined molding position by the air cylinder 30 and is pressed against the flanges on both sides of the A-toothed mold 2a by the pair of toothed molds 2 that are molded and rotated. And rotate while forming the cavity.
[0027]
Subsequently, the cavity is continuously filled with the following melted thermoplastic elastomer 5 while being continuously toothed and molded by the A toothed mold 2a rotating by the above-mentioned predetermined pressure and pressure, cooled and cured, and then paired. The long endless toothed belt 1 having a tooth shape is produced by rotating the loop between the toothed molds 2 around the circumference and fusing the front and rear ends of the molding. The thermoplastic elastomer 5 is agitated and melted by a rotary screw of an extruder, rectified into a flat plate shape by an extruder nozzle 7, and supplied to the aforementioned cavity.
[0028]
Next, the tooth number counting unit 3 provided in the long endless toothed belt manufacturing apparatus, which is the main part of the present invention, will be described in detail with reference to FIGS. As shown in FIG. 3, an inner space in which the belt molded body 9 rotates in a loop between a pair of toothed molds 2a and 2b constituting a long endless toothed belt manufacturing apparatus, that is, teeth on the exposed side of the belt tooth surface. A number counting unit 3 is provided. In the present embodiment, the following configuration is fastened from the extendable movable body 26 of the B toothed mold 2b via the support mechanism 27.
[0029]
First, a detector 33 for counting start / end marks (one mark serves as both counting start and count end marks), a belt tooth surface height detector 34 and a counter 35 for determining one tooth by tooth surface height, And a counting means 13 for the number of molded teeth.
[0030]
Next, there is provided means for supporting a toothed molding belt (object to be detected) 11 that circulates between the pair of toothed molds 2 in a loop shape. In this embodiment, the belt is positioned on the back surface of the toothed belt of the pattern detection unit. 3 and 5 show a belt moving support roll 18 which is a rotating roll body.
[0031]
The counting start end mark detector 33 is a color sensor that generates a counting start output signal by detecting a mark affixed to the top of a count start scheduled tooth. One round is detected again, the same mark is detected again, and a signal is issued, which also serves as a count end detection.
[0032]
The number-of-molded tooth counting means 13 comprises a belt tooth surface height detector 34 and a counter 35 that discriminates one tooth by the tooth surface height. The belt tooth surface height detector 34 is a belt tooth crest surface. A laser displacement sensor that captures the rugged shape from above is provided. With this sensor, the uneven shape of the tooth surface can be measured with high precision, and the unevenness of the belt tooth surface during constant speed movement can be visually displayed as a waveform 37. The count value for each tooth is integrated by the counter 35 from the graphic controller 36 of the detector. Details will be described later.
[0033]
The belt movement support roll 18 is made of a true cylinder whose surface is polished so as to prevent the vibration of the belt during constant speed movement, and is slightly urged in contact with the back surface of the belt to rotate to the lower end of the vertical movement bracket 42. I support it.
[0034]
As shown in FIG. 3, the detector support mechanism 27 has its main body frame 44 fastened to the extension movable portion main body 26. Rotating bearings are provided on the upper and lower ends of the ball screw 43, and the handle 45 is rotated by the handle 45, and the vertical moving bracket 42 is guided by the linear guide 46 without rattling. . Since the mark detector 33, the belt tooth surface height detector 34, and the belt movement support roll 18 are integrally fixed to the vertical movement bracket 42 in the optimum detection position relationship, the position adjustment in each case is unnecessary. With this, all tooth types can be handled with certainty. During spinning of the core wire 1c, this vertical adjustment is used to escape the winding core wire 1c from contact with the movable support roll 18.
[0035]
Subsequently, the counting control system is shown in FIG. 5, and includes a mark detector 33, a belt tooth surface height detector 34, a graphic controller 36, and a counter 35. An analog signal from the belt tooth surface height detector 34 is input to the graphic controller 36, and a calculation is performed at a tooth height discrimination level 38 obtained and set in advance, the limit is determined, one tooth is counted, and a sequencer is provided. Output to the counter 35. The sequencer counts the number of teeth by accumulating the output of the counter 35 based on the count start / end signal from the mark detector 33.
[0036]
Further, a method for counting the number of teeth of a long endless toothed belt, which is a main part of the present invention, will be described with reference to FIGS. In the manufacturing method of a long endless toothed belt, as shown in FIG. 2, a step of counting the following number of teeth, which is a main part of the present invention, is provided. That is, in this process, the number of molded teeth of the endless belt molded between the pair of toothed molds 2 is counted in the molding process.
[0037]
First, the position corresponding to the sensor detection is detected at the top of the belt tooth that is retreated by about 100 mm from the foremost end of the forming belt 11 that is molded and rotated by the B-tooth mold 2b and is located in front of the tooth number counting means 13. Affix the mark tape to.
[0038]
When this color tape is detected by the mark detector 33, counting is started from the next tooth of the detected tooth, and when the molding belt 11 makes a round between the pair of toothed molds 2 and detects the same tooth again. This is the end of counting.
[0039]
The mark detector 33 detects the belt counting start point and end point, and the belt tooth surface height detector 34 continuously measures the distance to the belt, that is, the displacement. The change in the distance to the belt detected by the belt tooth surface height detector 34 is subjected to tooth discrimination calculation with a limit setting value obtained in advance with respect to the tooth height of the belt to be counted, converted into the number of teeth and counted. The limit setting value obtained in advance is automatically selected by the size selection signal when the tooth size is changed.
[0040]
The embodiment is not limited to the above, and may be modified as follows, for example.
Without using the graphic controller 36, it is possible to determine the presence or absence of the limit value directly from the amount of displacement and to count it, or to control the calculation with a personal computer instead of this type of commercially available controller.
Instead of attaching the mark, a mark corresponding to the sensor detection position may be attached with a magic pen or the like.
Depending on the shape of the back of the belt, a roll with a shape corresponding to the shape can be formed.
(4) After one round of molding, before taking out the product, the number of teeth may be counted at a speed higher than the molding rotation.
[0041]
【The invention's effect】
According to the configuration of the first aspect, the expensive and space-consuming special moving means for moving the toothed belt in the length direction can be used in combination with high accuracy. Therefore, a dedicated tooth number measuring machine is not required. At the same time, the counting inspection in the post process can be advanced and the man-hours can be shortened and the lead time of production can be shortened. In addition, belt replacement for counting is unnecessary, no in-process storage space or work space is required, and the number of counting steps can be greatly reduced, thereby reducing the number of steps. In particular, it is more effective when the inter-axis distance between the pair of toothed molds 2 is increased.
[0042]
According to the configuration of claim 2 and the method of claim 5 , since the tooth height of any belt having different thicknesses, tooth heights, tooth pitches, etc. of the toothed belt is detected as a displacement with high accuracy, the determination is made. The standard is fine and versatile with respect to specification differences. Moreover, since the displacement difference can be set visually in a waveform and a plurality of setting numbers can be determined and selected in advance, automation is easy in terms of operability.
[0043]
According to the configuration of claims 3 and 4, in the detection of the belt tooth surface, in order to ensure the overall accuracy of the detection, it is a problem to prevent the vibration due to the rotational travel of the measured belt. The structure can completely prevent the shake with a simple mechanism, and the detection accuracy is improved and the reliability is increased.
[Brief description of the drawings]
FIG. 1 is a partial perspective view of a long endless toothed belt.
FIG. 2 is a schematic view showing a process for producing a long endless toothed belt.
FIG. 3 is a detailed front view of a tooth number counting device according to the present invention.
FIG. 4 is a detailed plan view of a tooth number counting unit according to the present invention.
FIG. 5 is a schematic diagram for detecting the displacement of the tooth height according to the present invention and displaying the waveform.
FIG. 6 is a front view of a long endless toothed belt manufacturing apparatus.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Long endless toothed belt 1a Back surface part 1b Tooth part 1c Core wire 2 A pair of toothed mold 2a Molded toothed mold (A toothed mold)
2b Extension tooth mold (B tooth mold)
3 Teeth Counting Device 5 Thermoplastic Elastomer 6 Steel Band 7 Extruder Nozzle 8 Spinning Mechanism 9 Belt Constituent 13 Counting Means 18 Belt Movement Support Roll R1, R2 Guide Roll R3 Stretching Roll 20 Guide Roll 27 Support Mechanism 33 Mark Detector 34 Belt tooth height detector 35 Counter 36 Graphic controller 38 Discrimination level 42 Vertical movement bracket

Claims (5)

A pair of toothed molds comprising a molded toothed mold and an extended toothed mold, a spinning mechanism for winding a core wire in a spiral shape at a predetermined pitch between the molds, and a circular rotation in a pressure contact state with the molded toothed mold In an apparatus for producing a long endless toothed bed, comprising a steel band that forms a tooth profile, and an extruder that fills a cavity between the molded toothed mold and the steel band with a molten thermoplastic elastomer,
A long endless tooth comprising a detector for detecting the start and end of counting based on the presence or absence of a mark on the surface of the belt tooth portion and a means for counting the number of molded teeth between a pair of toothed molds Equipment for manufacturing attached belts. The means for counting the number of molded teeth is
The apparatus for manufacturing a long endless toothed belt according to claim 1, comprising a displacement detector for discriminating one tooth in the tooth surface height direction and a counter for counting the discriminant value. In the means for counting the number of molded teeth,
The apparatus for producing a long endless toothed belt according to claim 1 or 2, further comprising means for supporting a toothed belt (detected body) that circulates between the pair of toothed molds in a loop shape.   The means for supporting a toothed belt that circulates between the pair of toothed molds in a loop is a rotating roll body located on the back surface of the toothed belt of a counting means for detecting the number of molded teeth. Manufacturing equipment for long endless toothed belts. The distance between the axes is preliminarily determined between a pair of toothed molds consisting of a molded tooth mold that forms a tooth shape and an extended tooth mold that defines a predetermined interaxial distance, and the core wire is wound spirally at a predetermined pitch. Then, the molded toothed mold is pressed with a steel band and rotated in a rotating state, and the molten thermoplastic elastomer filled in the cavity between the molded toothed mold and the steel band is compression-molded, cooled and hardened to a predetermined level. In a method of manufacturing a long endless toothed belt that forms a tooth shape,
A mark is added before the count is started, and this is detected by the detector at the rear position and converted to a count start and count end signal, and one tooth is discriminated in the tooth surface height direction by the displacement detector, and the count is performed. A method of counting the number of teeth of a long endless toothed belt, comprising a step of accumulating the number of teeth from the start to the end and counting the number of teeth.

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