JPS63292014A - Inspecting apparatus - Google Patents

Abstract

PURPOSE:To enable the precise and simple inspection of the machining precision of a belt over a full length thereof or that of a pulley, by detecting a displacement value of an inter-axial distance of pulleys by a non-contact displacement detecting means. CONSTITUTION:A drive-side pulley 2 is rotated through the intermediary of a pulley 10, a belt 11 and a pulley 12 by a drive of a motor 9, and a movable- side pulley 4 is rotated by this rotation through the intermediary of a belt 5 to be inspected. A prescribed tension W is given to the belt 5 by a counterweight 6, and a moving stage 3 moves in the case when a variation occurs in an inter-axial distance between the pulleys 2 and 4 due to a machining dimensional error of a minute part of the belt 5, e.g. an imperfect gear-cut part (a) thereof. The amount (l0-l1) of movement of said stage is read by a non-contact displacement detector 14 and an output thereof is led to a recorder 16. Meanwhile, a reference pulse obtained by dividing the frequency of a pulse of an angle detector 13 into 1/N by means of a frequency-dividing counter 15 is led to the recorder 16, and the amount of displacement corresponding to an angle of rotation of the pulleys is graphed to be determined.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to an inspection device for detecting the machining accuracy of a belt or a pulley.

2. Description of the Related Art A belt measuring machine is known as a conventional belt inspection device. Hereinafter, a conventional belt measuring machine will be explained with reference to FIG. In FIG. 6, 101 is a fixed toothed master pulley (master timing belt pulley 9), 102 is a movable toothed master pulley (master timing belt pulley), and 103 is a moving stage that supports the movable master pulley 102. By moving this moving stage 103, the movable master pulley 10
3 moves opposite to the fixed master pulley 101, so that the distance between the axes can be changed.

Reference numeral 104 denotes a toothed belt (timing belt) to be tested, which is hung between master pulleys 101 and 102;
5 is a weight connected to the movable stage 103 by a wire 106, and is pulled down through a pulley 1o in a direction to separate the movable stage 103 and the movable master pulley 102 from the fixed master pulley 101. A dial gauge 108 measures the amount of movement of the moving stage 103.

Next, the operation of the above conventional example will be explained.

The moving stage 103 and the movable master pulley 102 are fixed to the master pulley 101 due to the weight of the weight 105.
The test belt 104 is moved in the direction of separation from the test belt 104, and a constant tension T is applied to the test belt 104. Therefore, by replacing the test belt 104, each test belt 104 and the master pulleys 101, 10
2 appears on the moving stage 103, the value is displayed on the dial gauge 108, and the relative machining accuracy of the belt 1Q4 to be tested can be measured.

Problems to be Solved by the Invention However, in the configuration of the conventional example as described above, since the master pulley 101 is fixed, the test belt 1 is continuously
It is not possible to measure changes in the distance between the axes over the entire length of 04. Further, since the main shaft of the dial gauge 108 contacts the moving stage 103 and pressurizes the moving stage 103, it acts in a reaction against the weight of the weight 105. For this reason, the pressing force is subtracted from the tension desired to be applied to the belt 104 to be tested, making it impossible to obtain accurate measured values.

The present invention solves the above-mentioned problems of the prior art, and provides a belt inspection device that can precisely and easily inspect the machining accuracy over the entire length of the belt or the machining accuracy of the pulley. The purpose is to

Means for solving the problems and technical means of the present invention for solving the above-mentioned problems include: a drive pulley that is rotatably supported in a fixed position; and a drive pulley that is movable in a direction opposite to the drive pulley. and a movable pulley that is rotatably supported by a shaft, a belt that is hung on the drive pulley and the movable pulley, and the movable pulley is separated from the drive pulley to apply tension to the belt. means for applying rotational driving force to the driving pulley; means for detecting the rotation angle of one of the pulleys; and means for non-contactly detecting the displacement of the distance between the axes of the two pulleys. It is equipped with the following.

For production The effects of the above technical means are as follows.

That is, since a machining dimensional error in a minute part over the entire length of the belt or a machining dimensional error in a pulley appears as a displacement in the distance between the axes of the IJ, the displacement value is accurately detected by a non-contact displacement detection means, The rotation angle of the pulley is detected by the angle detection means, and the location where the machining dimensional error occurs can be compared with the amount of error.

EXAMPLES Hereinafter, examples of the present invention will be described with reference to the drawings. FIG. 1 is an overall configuration diagram of an inspection apparatus according to an embodiment of the present invention.

In Fig. 1, 1 is a machine frame, 2 is a toothed drive pulley (timing belt pulley) which is a master pulley rotatably supported at a fixed position with respect to the machine frame 1, and 3 is a machine frame 1.
A moving stage 4 is rotatably supported on the moving stage 3 so as to be movable in a direction opposite to the driving pulley 2, and a toothed movable master pulley 4 is rotatably supported on the moving stage 3 and is movable in a direction opposite to the driving pulley 2. A side pulley (timing belt pulley), 6 is an endless toothed belt (timing belt) that is the object to be inspected, meshed with the driving pulley 2 and movable pulley 4, and 6 is attached to the moving stage 3 by a wire 7. The movable stage 3 and the movable pulley 4 are always pulled with constant tension in the direction of separating them from the driving pulley 2 by a weight hanging down via a pulley 8 connected and supported by the machine frame 1. 9 is a motor supported on the machine frame 1; 10 is a pulley linked to the output shaft of the motor 9; 11 is a pulley mounted on the rotating shaft of the driving pulley 2; 12
is an endless heald hung on pulleys 1o and 11, 1
3 is an angle detector supported by the machine frame 1 and detects the rotation axis of the drive pulley 2, that is, the rotation angle of the drive pulley 2;
14 is a displacement detector that non-contact detects the amount of displacement of the moving stage 3, that is, the movable pulley 4 with respect to the driving pulley 2;
A frequency division counter which divides the frequency into (number of teeth) and outputs a reference pulse, 16 is a recorder.

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

Driven by the motor 9, the first drive pulley 2 is rotated via the pulley 10, belt 12, and pulley 11. This rotation of the pulley 2 causes the movable pulley 4 to rotate via the belt 6 to be inspected. Since a constant tension is always applied to the test belt 5 by the weight 6, the distance between the axes of the driving pulley 2 and the movable pulley 4 changes due to a machining dimensional error in a minute part of the test belt 6. In this case, the moving stage 3 moves. This amount of movement is read by a non-contact displacement detector 14. The output of this non-contact displacement detector 14 is guided to the recorder 16, and a reference pulse obtained by dividing the pulse of the angle detector 13 to 1/N by the frequency division counter 16 is guided to the recorder 16, and the rotation angle of the driving pulley 2 is Graph the amount of displacement corresponding to .

The principle by which the machining accuracy of the belt to be inspected 5 can be inspected by detecting the displacement of the distance between the axes of the drive-side pulley 2 and the movable-side pulley 4 will be explained. FIG. 2 is an enlarged plan view showing a state in which the defective gear cutting part a of the belt to be tested 6 does not engage with any of the boots 2.4, and FIG. 3 shows the defective gear cutting part a of the belt to be inspected, FIG. 4 is an enlarged plan view showing a state in which the support pulley 4 is engaged with the support pulley 4;

As shown in FIG. 2, in a state where the gear cutting failure part a of the heald 6 to be tested is not engaged with any of the pulleys 2.4, the pulleys 2.4 have a normal center distance of 1°, but the As shown in FIG. 3, in a state where the gear cutting defect part a is engaged with the pulley 4, the apparent inner circumferential length of the belt 5 to be inspected changes, and the center-to-axis distance 1o changes to 11. In the above configuration, when the motor 9 is rotated at a very low speed, for example, about 5 rpm, data as shown in FIG. 4 is recorded in the recorder 16. The following three things can be seen from this Figure 4. First, if we focus on the fluctuations in one cycle, we can see that the thickness of the belt 6 to be tested, including the tooth height, changes due to the fact that the inner and outer molds do not maintain coaxiality during the manufacturing stage. Second, fine fluctuations in the distance between the shafts can be seen in the belt 5 under test.
It can be seen that this is due to the deformation of each tooth profile. Thirdly, when there is an abnormality in the protrusion data such as 91, that is, in the tooth profile, by comparing it with the number of teeth (1/N pulse number), the location of the abnormal tooth profile and the amount of change can be confirmed in association with each other.

The machining accuracy of the heald 5 to be inspected can be inspected using the above three data and the like.

In the above embodiment, the rotation angle of the driving pulley 2 is detected, but the rotation angle of the movable pulley 4 may also be detected. Also master pulley 2.4
We have explained the case where the belt 6 is inspected using
The belt 5 may be used as a master held and the pulley 2.4 may be inspected. Furthermore, by using a non-master pulley and belt and slightly increasing the rotation speed of the motor 9, for example,
By setting the pulse rate of the angle detector 13 to once per pulley revolution and making it appear on the recorder 16, data as shown in Fig. 5 can be obtained, and an inspection similar to the meshing test can be performed. It can be carried out.

Effects of the Invention As is clear from the above description, according to the present invention, a heddle is applied to a drive pulley and a movable pulley that is movable in a direction opposite to the drive pulley, and a constant tension is applied to the belt. As the pulley and belt rotate, changes in the distance between the pulley axes are accurately detected without contact, and the measurement is made in correspondence with the rotation angle of the pulley.
The machining accuracy over the entire length of the belt or the machining accuracy of the pulley can be inspected with high precision and easily.

[Brief explanation of the drawing]

1 to 3 show an inspection apparatus according to an embodiment of the present invention, in which FIG. 1 is an overall configuration diagram, FIGS. 2 and 3 are enlarged plan views of main parts for explaining operation, and FIG. 4 6 is a diagram showing inspection data according to the above embodiment, FIG. 6 is a diagram showing inspection data according to another embodiment of the present invention, and FIG. 6 is a configuration diagram of a conventional heald measuring machine. Side pulley, 3...Movement stage, 4...
・Movable pulley, 5...Belt to be tested, 6...Weight, 9
... Motor, 13... Angle detector, 14... Non-contact displacement detector, 15... Frequency division counter, 16...
recorder. Name of agent: Patent attorney Toshio Nakao and one other person? −
Drive side pulley 3 - Moving stage 4 - Support side pulley 5 - Extraction belt B - Departure Copper 9 - Motor 13 - Angle detector/4 - Jl touch displacement detector 15 - Interlayer counter I B - Recorder 1 Fig. 2 Fig. 2'\ a *v++ Not 1 Fig. 3 Fig. 4 a-M locking turtle b -m-number of teeth (pulse number) Fig. 5゛1

Claims (2)

[Claims] (1) A drive-side pulley rotatably supported in a fixed position;
A movable pulley that is movably and rotatably supported in a direction opposite to the drive pulley, a belt that is hung around the drive pulley and the movable pulley, and a belt that connects the movable pulley to the drive pulley. a means for applying tension to the belt, a driving means for applying rotational driving force to the driving pulley, a means for detecting the rotation angle of one of the pulleys, and a means for determining the distance between the axes of the two pulleys. An inspection device characterized by comprising means for detecting displacement in a non-contact manner. (2) The inspection device according to claim 1, wherein the driving pulley, the movable pulley, and the belt are each formed with teeth and are meshed with each other.