JPH07119583B2 - Roof tile strain measurement method - Google Patents

Description

TECHNICAL FIELD The present invention relates to a method for quickly and accurately measuring the strain of roof tiles in the manufacturing process of ceramic roof tiles and the like.

Generally, the shapes of roof tiles to be mass-produced are basically the same.

Therefore, since the roof tiles to be used by being piled up are stacked from the crosspiece side lower edge portion and the collar side upper surface portion, these shapes constitute an important element of the roof tile.

For this reason, particular attention is paid to the shapes of the lower edge portion on the crosspiece side and the upper surface portion on the collar side in molding, and it is desired that they are horizontally molded.

Therefore, the present invention assumes that the shapes of the above-mentioned cross-side lower edge portion and collar-side upper surface portion of most of the tiles that are mass-produced are within the allowable range when roofing, and all the tiles that are mass-produced are distorted. Is to measure.

(Prior Art) As shown in FIGS. 14 to 16, the conventional roof tile strain measuring device has four rotations near the top end of the roof tile of the roof belt belt V and near both ends of the top face of the collar. Transducer T,
The rollers R, R and R ', R'of T and T', T'are brought into contact with each other through the pulse counters L, L and L ', L'. I was measuring. In this case, as shown in Fig. 11, the measurement points are the measurement points A ', B', C ', D'on the upper surface near the four corners of the roof tile on both the crosspiece side and the collar side. It was not possible to directly measure the contacting points (A, B, C, D) when the roof was opened. That is, while A ′ and B ′ are the upper surfaces of the roof tiles K, when the roof tiles are piled up, the contact point with the adjacent roof tiles K ′ is the lower edge of the roof tiles K side, Since the points are different based on the points A ', B', therefore A ', B'to A, B
However, the strain amount from C ', D'to C, D could not be measured, and the strain could not be measured accurately. In addition, there were many failures with mechanical structures such as rotary transducers T and T '.

(Problems to be Solved by the Invention) In the measurement of the roof tile strain, the present invention has been desired to develop a method and a device capable of accurately and easily measuring the strain of a portion abutting when the roof tile is roofed. It is a solution.

(Means for Solving the Problems) In order to solve the above problems, the present invention provides a method for measuring the strain of a roof tile moving on a conveyor, in which the crosspiece side of the roof tile is arranged in parallel with the traveling direction of the conveyor, Optical displacement sensors are arranged at the same height above the buttocks side and the head side of the upper surface of the collar side on the same line parallel to the traveling direction of the conveyor, and the lower edge of the roof tile side is pressed through the rollers. Abutting on the conveyor, optically measuring the distance between the optical displacement sensor and a fixed measurement point on the hip side and the distance between the optical displacement sensor and a fixed measurement point on the head side, respectively, This is a method for measuring the strain of roof tiles, which is characterized by calculating the difference between the distances.

(Structure of the Invention) The structure of the present invention will be described with reference to the drawings of the embodiments.

Example 1 As shown in FIGS. 1 to 3, the strain measuring device 1 is a roof tile K.
The chain conveyor 2 is horizontally provided on the crosspiece side S of the chain conveyor 2, and the attachment 4 is attached to the outer surface of the chain 3 of the chain conveyor 2.
And a belt conveyor 8 with a rope belt 7 on the collar side E of the roof tile K at the other end of the drive rotary shaft 6 of the drive chain wheel 5 of the chain conveyor 2 in parallel with the chain conveyor 2 in the same direction and at the same speed. The driven wheel 9 and the conveyor drive motor, which are movably arranged on the
A belt 12 is hung between the drive wheels 11 of the ten.

Roof tile K on which the crosspiece side S and the collar side E are placed on the chain conveyor S on the crosspiece side S and the belt conveyor 8 on the collar side E, respectively.
A pressing roller 13 is provided immediately above the crossing pass G of the above so as to elastically press the crossing pass G by a spring 14, an optical displacement sensor 15 is provided above the collar side E, and both conveyors 2 and 8 are installed. A photoelectric switch 16 for detecting the entrance of the roof tile K to the measurement position is provided in the intermediate traveling direction. Although the photoelectric switch is used in all of the drawings in each embodiment, a limit switch or the like may be used in place of the photoelectric switch 16.

In the figure, 17 is a carry-in conveyor, 18 is a carry-out conveyor, and the code is "A".
“-B” indicates the lower edge of the crosspiece, and C and D indicate measurement points on the collar side.

Incidentally, for all the examples, the conveyor of the measuring device is not limited to the chain conveyor, belt conveyor,
Other slat conveyors can be freely selected according to the situation. Further, the belt conveyor may be provided with a supporting portion to substitute for the chain conveyor and the slat conveyor.

Embodiment 2 As shown in FIGS. 4 to 7, the strain measuring device 1 ′ has an attachment 4 on the upper surface of the chain conveyor 2 on the crosspiece side S.
Are continuously arranged and attached, and the attachment 21 is attached to the chain 20 at a position supporting the substantially central portion of the roof tile K of the chain conveyor 19 on the collar side E. Other structures are similar to those of the first embodiment. .

In the figure, reference numeral 22 denotes a photoelectric switch for timing adjustment.

Embodiment 3 As shown in FIG. 8 to FIG. 10, the strain measuring device 1 ″ is attached to the upper surface of the chain conveyor 2 on the crosspiece side S by continuously arranging the attachments and measuring on the belt conveyor 8 on the collar side E. The belt receiving member 27 is provided at a position where the substantially central portion of the measured roof tile K at the position on the collar side E is slightly lifted. Other structures are the same as those in the first embodiment.

(Operation of the Invention) The operation of the present invention will be described with reference to the drawings of the embodiments.

Embodiment 1 As shown in FIG. 1 to FIG. 3 and FIG. 11 to FIG. 13, the roof tile K conveyed by the carry-in conveyor 17 is moved by the conveyor drive motor 10 in the direction of arrow P and the measuring device 1 is running. When the cross-piece side S of the roof tile K is transferred onto the chain conveyor 2 and the collar side E is transferred onto the belt conveyor 8 on the chain conveyor 2 and the belt conveyor 8, the pressing rollers 13 and 13 are the upper surfaces of the cross section G of the roof tile K. Since the spring 14 is pressed by the elastic force of the spring 14, the crosspiece side lower edge portion AB is closely contacted with the attachment 4 group continuously provided on the upper surface of the chain conveyor 2 and moves in the direction of arrow P to move the roof tile. Photoelectric switch 16 with the tip of K being the tip
When the optical displacement sensors 15 and 15 are momentarily activated, the respective distances from the measurement points C and D are measured and the first
The height difference between the measurement points C and D is measured through the A / D converter 23, the arithmetic circuit 24, the determination circuit 25 and the display circuit 26 shown in FIG.
It is possible to display whether or not the magnitude of the distortion is within a predetermined allowable error range, and further send a signal to a sorting device (not shown) in the next step.

The principle of the present invention is that the cross-piece-side lower edge portion of the roof tile K is formed in a straight line at the time of molding, and the linear cross-piece-side lower edge portion is used as a reference.

In addition, it will be described in consideration that there is generally no difficulty in obtaining a linear lower edge portion on the crosspiece side in terms of the production technology of the roof tile K.

Details of this point will be further described with reference to FIG. 16 of the accompanying drawings together with other drawings.

Optical displacement sensors 15 and 15 are arranged at the same height above the butt R1 side and the head R2 side of the collar-side upper surface of the roof tile K and on the same line parallel to the traveling direction of the conveyor 2.

On the other hand, the lower edge portion AB of the roof tile K is brought into contact with the chain conveyor 2 side via the press rollers 13, 13.

Therefore, the distance Zc between the optical displacement sensor 15 and a certain measuring point C on the side of the hip R1 and the optical displacement sensor 15 and the head R2
The distance Zd between the constant measurement points D on the side is optically measured (Z-axis direction in the drawing).

The difference between the measured distances Zc and Zd is calculated.

Therefore, for example, as is clear from FIG. 16, when the distance Zd at the measuring point D is longer than the distance Zc at the measuring point C, a numerical value that the head R2 side of the roof side of the roof tile K is high is obtained. It will be.

The distance Zc between the above-mentioned at least two measurement points C and D,
By measuring Zd, there is an advantage that the parallelism in the Z-axis direction on the drawing can be determined.

Embodiment 2 As shown in FIG. 4 to FIG. 7, an attachment 21 attached at an interval of the chain conveyor 19 on the collar side B.
Supports a substantially central portion of the lower surface of the roof side K of the roof tile K, which is conveyed with timing adjusted by the photoelectric switch 22, at one location, so that the measurement points A and B on the cross section S are chain conveyors on the cross section S. Attachments 4, 4 ...
・ It is positioned linearly on the top, and the measurement points A and B
Similar to the first embodiment, the height difference between the measurement points C and D on the collar side E can be measured, calculated, judged, and displayed, and a signal can be sent to the sorting device in the next step.

Embodiment 3 As shown in FIG. 8 to FIG. 10, since the substantially central portion of the lower surface of the roof side K of the roof tile K at the measurement position is lifted and supported at one location, the measurement locations A and B on the crosspiece side S are supported. Is closely positioned on the attachment 4 which is connected to the chain conveyor 2 on the crosspiece S in a plane, and the measurement points C and D on the collar side E are raised and lowered with reference to these measurement points A and B. The difference is measured to determine the strain of the roof tile K.

(Advantages of the Invention) Since the present invention has the above-mentioned configuration, it has the following advantages.

By simply measuring the vertical distance between the two measurement points, the vertical parallelism between the crosspiece side lower edge portion and the collar side upper surface portion can be easily determined.

As a result, it is possible to determine whether or not the upper surface of the collar side is distorted, and thus it is possible to easily select a product having a small error in the roofing surface of the tile.

Since an optical displacement sensor is used, it does not come into contact with the roof tile surface, so errors are unlikely to occur.

The device is simple and inexpensive, such as using only two optical displacement sensors, and is easy to operate, so highly efficient work can be performed.

[Brief description of drawings]

FIG. 1 is a schematic front view of Embodiment 1 of the present invention, and FIG.
Right side view, FIG. 3 is the same, left side view, FIG. 4 is a schematic front view of Embodiment 2 of the present invention, FIG. 5 is the same, right side view, FIG. 6 is the same plan view, FIG. 7 is a right side view of the same, FIG. 8 is a schematic front view of a third embodiment of the present invention, and FIG. 9 is a right side view of the same.
FIG. 10 is the same, a plan view FIG. 11 is a plan view showing the measurement point of the roof tile, FIG. 12 is a perspective view showing the roofing of the roof tile, FIG. 13 is a block diagram of the electric circuit of the device of the present invention, FIG. 14 is a schematic plan view of the prior art, FIG. 15 is a side view of the same, FIG. 16 is a schematic view of the measuring method of the present invention, and FIG. 17 is a block diagram of an electric circuit of the prior art. (Explanation of symbols of main parts) 1,1 ′, 1 ″: Strain measuring device 2: Chain conveyor (Example 1) 3: Chain, 4: Attachment 8: Belt conveyor, 13: Pressing roller 14: Spring, 15: Optical displacement sensor 16: Photoelectric switch 19: Chain conveyor (Example 2) 20: Chain (〃) 21: Attachment (〃) 27: Belt receiver E: Collar side, G: Pass section K: Roof tile, S: Pier side

Claims (1)

[Claims] 1. A method for measuring the strain of a roof tile moving on a conveyor, wherein the roof side of the roof tile is arranged parallel to the traveling direction of the conveyor, and the same height is provided above the hip side and the head side of the upper surface of the collar side. The optical displacement sensors are arranged on the same line parallel to the traveling direction of the conveyor, and the lower edge of the roof tile side is brought into contact with the conveyor via the pressing roller to make a constant measurement of the optical displacement sensor and the rear side. Distortion measurement of tiles, characterized in that the distance between the tile and the optical displacement sensor and the distance between the fixed measurement points on the head side are optically measured, and the difference between the distances is calculated. Method.