JPH0467604B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a connecting rod bending measuring machine that continuously measures the bending of connecting rods used in automobiles and the like.

[Prior art]

When a conrod used in an engine such as an automobile is assembled into an engine with its axis 50 bent as shown in the front view of FIG. 6, when the engine is rotated, the conrod 51, piston pin, and crankshaft Excessive stress may occur in these parts, causing them to break. For this reason, this bending is usually measured at the stage of manufacturing the connecting rod 51, and the bending is kept within a specified range.

FIG. 7 is a sectional view showing the main parts of a conventional connecting rod bending measuring machine for measuring the bending of such connecting rods. Conrod bending measuring machine 5 shown in this figure
2 is a reference surface 53 on which the cooking rod 51 is placed;
, a pressing mechanism 54 disposed above this reference plane 53, and a measuring mechanism 55 disposed on the side of this pressing mechanism 54, as shown in FIG. As shown in FIG. Connect the measuring head 56 to the conrod 51.
When it comes into contact with the piston pin side 51b which is the other end, the measuring stylus 56 is moved from the side 51c of the connecting rod 51 that is in contact with the reference surface 53 (reference surface side).
Height E up to 51d on the side in contact with (both measurement sides)
can be measured. Therefore, if the height E' of the standard cooking stove (master work) is measured in advance, it is possible to compare the height E' of the master workpiece with the measured value (height) E of each cooking stove 51. Accordingly, it can be determined whether the bending of each connecting rod 51 is within a specified value.

[Problem that the invention seeks to solve]

By the way, in such a conventional connecting rod bending measuring machine, when measuring the bending of the connecting rod 51, the reference surface 5 is
3 and the pressing mechanism 54, the connecting rod 51 could only be fed onto the reference surface 53 by intermittent feeding, which caused the following problems. .

(a) Due to intermittent feeding, the conveying speed of the connecting rod 51 cannot be increased, and therefore the measuring speed cannot be increased.

(b) When feeding the conrod 51 from the previous stage device to this conrod bending measuring machine, the conrod 51 must be delivered and received at the right timing between the front stage device and the conrod bending measuring machine. If it is misaligned, problems such as the condensing rod 51 getting caught in a feeder or the like that carries the conning rod 51 above the reference surface 53 will occur.

In addition, in this connecting rod bending measuring machine, since the reference surface side 51c and the measuring surface side 51d of the connecting rod 51 are front and back, changes in the thickness t of the connecting rod 51 affect the measured value E, making it impossible to measure the bending correctly. There was a problem.

[Purpose of the invention]

In view of the above circumstances, this invention is capable of measuring the bending of a connecting rod by continuous feeding, and
It is an object of the present invention to provide a conrod bending measuring device that can prevent the thickness of the conrod from affecting the measured value.

[Means for solving problems]

In order to achieve this object, the present invention uses one surface of one end of the connecting rod 7 as a reference surface 39 of the measuring mechanism.
In a connecting rod bending measuring machine that measures the bending of the connecting rod 7 by measuring the position of one surface of the other end of the connecting rod 7 with respect to the reference surface 39 while pressing the connecting rod 7, a conveyor belt 15 for discharging the work from the workpiece discharge port 8; a reference surface 39 provided above the conveyor belt 15; a front-rear feed roller 37 provided before and after the reference surface 39 for conveying the connecting rod 7 in its running direction; 38; a means for detecting that one end side of the connecting rod 7 has been conveyed to the position of the reference surface 39; and a means provided below the conveyor belt 15 to press the conveyor belt 15 upward to a pressing mechanism 10 that presses the upper surface of one end of the connecting rod 7 being conveyed against the reference surface 39 ; a measuring arm 41 pivotably supported on the forward feed roller 37 side; a measuring roller 42 pivoted on the end of the measuring arm 41 on the forward feed roller 37 side and rotating in contact with the upper surface of the connecting rod 7; a detector 43 whose detection end is in contact with the upper surface and outputs a signal according to the position of the measuring roller 42 corresponding to the upper surface shape of the connecting rod 7; detects that one end side of the connecting rod 7 is at the position of the reference surface 39; a signal from the detecting means and the detector 4
The present invention is characterized in that it is equipped with a processing device that confirms the upper surface position of the other end side of the connecting rod 7 based on the output signal from the connecting rod 7, and determines and processes the bending of the connecting rod 7.

[Effect]

With the above configuration, the conveyor belt 15 is continuously run to detect that one end of the connecting rod 7 placed on the conveyor belt 15 has been conveyed to the position of the reference surface 39, and this detection signal is detected. With this, one end of the connecting rod 7 is pressed against the reference surface 39 by the pressing mechanism 10.
The height of the other end of the connecting rod 7 is measured by a detector 43 while the connecting rod 7 is slid against the surface of the connecting rod 7, and from this measurement result, a processing device (not shown) determines whether the connecting rod 7 is bent.

〔Example〕

The present invention will be described below with reference to embodiments shown in the drawings.

FIG. 1 is a front view showing an embodiment of the connecting rod bending measuring machine according to the present invention, and FIG.
It is a sectional view taken along the A line. In Figure 1, 1
is the board of this connecting rod bending measuring machine 2, and the connecting rod conveying mechanism 3 is located at the lower front side of this board 1.
A measuring mechanism 4 and a reference plane mechanism 5 are provided on the upper front side of the substrate 1.

The connecting rod conveying mechanism 3 pushes up the connecting rod 7 inputted from the workpiece input section 6 while conveying it in the direction of arrow B, and transfers the connecting rod 7 to the reference surface mechanism 5.
A conveyor belt section 9 that conveys the cooking rod 7 input from the workpiece input section 6 in the direction of the arrow and discharges it from the workpiece discharge section 8, and It is composed of a pressing part 10 that pushes up. Here, the conveyor belt section 9 includes a drive pulley 11, driven pulleys 12, 13, 14, a conveyor belt 15 hooked around these drive pulleys 11 and driven pulleys 12 to 14, and
first tension pulley 16 for compensating the length of
and a second tension roller 17 that automatically adjusts the tension pulley of the conveyor belt 15 so that the conveyor belt 15 whose length is compensated by the tension pulley 16 does not slacken. When the position of the threaded rod 20 is changed using the nut 19, the position of the bracket 21 with a U-shaped cross section provided at the tip of the threaded rod 20 changes, and the position of the bracket 21 attached to this bracket 21 changes. The position of the tension roller 16 of No. 1 changes.
Therefore, if the position of the first tension roller 16 is adjusted so that the second tension roller 17, which is constantly urged in the direction of arrow c by the spring shaft 22, is at the desired position, Even if the length of the conveyor belt 15 changes, this can be coped with. Further, the pressing portion 10 includes a lift mounting plate 2 having an inverted L-shape in longitudinal and transverse cross sections, which is attached to the substrate 1.
5, a parallel link mechanism 26 mounted on this lift mounting plate 25, and this parallel link mechanism 2
A pressing block 28 and rollers 29, 30 provided on the lift base plate 27 constituting the
and a cylinder 31 attached to the lift mounting plate 25, and the lift base plate 27 is
is always urged upward, and this lift base plate 27
A stopper pin 32 provided on the guide plate 33 stops when it comes into contact with the guide plate 33.

Further, the reference plane mechanism 5 includes a block stand 35 having an L-shaped longitudinal section attached to the substrate 1, a reference block 36 attached to this block stand 35, and a block stand 36 attached to the block stand 35 on the left and right sides (left and right in this figure) of this reference block 36. Feed rollers 37, 38 provided
A reference surface 39 is formed on the lower surface of the reference block 36, and the feed rollers 37 and 38 rotate in the direction of arrow D at the same speed as the drive roller 11.

Further, the measuring mechanism 4 is connected to the block stand 35.
A measurement board 40 attached to the lower surface of the measurement board 40, and a measurement arm 41 pivotally supported on the lower side of the measurement board 40.
, a measuring roller 42 provided at one end of the measuring arm 41 , and a detector 4 vertically provided on the measuring board 40 so as to come into contact with the other end of the measuring arm 41 .
3, an arbor bar 44 that restricts the movement of the measuring arm 41, and a compression spring 45 that biases the one end side of the measuring arm 41 downward, and the detector 43 detects the position of the measuring roller 42. It is designed to output a signal according to the information and send it to a processing device (not shown). Further, a photo sensor (not shown) is provided as means for detecting that one end of the cooking rod 7 has been conveyed to the position of the reference surface 39.

Next, the operation of this embodiment will be explained with reference to FIGS. 3A to 3D.

First, as shown in FIG. 3A, the connecting rod 7 introduced into the workpiece introduction section 6 is conveyed in the direction of arrow B by the conveyor belt 15. Then, this connecting rod 7 is further conveyed in the direction of arrow B while touching the measuring roller 42 and lifting it, and when one end thereof touches the feeding roller 37, it is moved downward by the rotation of the feeding roller 37, as shown in FIG. 3B. While being pushed, the sheet is further conveyed in the direction of arrow B by the movement of the conveyor belt 15. At this time, if the cooking rod 7 is pushed down, the pressure block 28, rollers 29, 30, and lift base plate 2 will be moved together with the conveyor belt 15 on which the cooking rod 7 is placed.
However, since the pressing block 28, rollers 29, 30, and lift base 27 are always urged upward by the cylinder 31, the connecting rod 7, which is pressed downward by the feed roller 37, The upper surface of one end is pressed against the lower end of the feed roller 37. Next, the cooking rod 7 is further conveyed in the direction of arrow B by the conveyor belt 15 while being urged upward by the pressing mechanism 10, and the upper surface side of one end thereof is pressed against the reference surface 39 as shown in FIG. 3C. Since the measuring roller 42 of the measuring mechanism 4 is in contact with the upper surface of the other end of the connecting rod 7 while being conveyed in the direction of arrow B while being
The measuring arm 41 rotates accordingly, and the detector 43 outputs a signal corresponding to the height of the upper surface of the other end of the connecting rod 7. That is, if the connecting rod 7 is straight as shown in FIG. If it curves upward as shown in Figure 4 (b), it outputs the signal shown in Figure 5 (b), and if it curves downward as shown in Figure 4 (c). If so, the signal shown in FIG. 5C is output. Note that only the portion of the signal indicated by the solid line is used as the measurement result. Therefore, the bending of the conrod 7 can be determined from the maximum value _PMAX of the signal output from the detector 43. After this measurement, the cooking rod 7 is then conveyed in the direction of arrow B by the conveyor belt 15 and discharged from the workpiece discharge section 8 as shown in FIG. 3D.

Thereafter, as described above, the bending of the connecting rod 7 introduced from the workpiece introduction section 6 is continuously measured.

In addition, in the above-mentioned embodiment, in order to simplify the explanation, the present invention was explained by taking as an example the connecting rod 7 whose one end side and the other end side are the same height (the connecting rod 7 without a step). In reality, when the conrod 7 has a step, this step difference is electrically preset and this preset value is added to the output of the detector 43. ) It is possible to measure the bending of all conrods with just one piece.

〔effect〕

As explained above, the connecting rod bending measuring machine according to the present invention runs the conveyor belt continuously, and measures one end of the connecting rod placed on the conveyor belt by pressing it against the reference surface from below using the pressing mechanism and sliding it. The height of the other end of the conrod is measured by a mechanism, and the bending of the conrod is determined from the measurement result. Therefore, the convergence of the conrod can be measured by continuous feeding, and the measurement speed can be increased accordingly. In addition, it is possible to prevent troubles such as jamming when loading the stove rod into the stove rod input section. Further, in this invention, since the reference surface side and the measurement surface side of the connecting rod are the same surface, even if the thickness of the connecting rod changes, the correct amount of bending can always be measured.

[Brief explanation of the drawing]

FIG. 1 is a front view showing an embodiment of the connecting rod bending measuring machine according to the present invention, and FIG.
A sectional view taken along line A, FIGS. 3A to 3D are operation diagrams for explaining FIG. 1, FIGS. 6 is a front view showing an example of a connecting rod, FIG. 7 is a sectional view showing an example of a conventional connecting rod bending measuring device, and FIG. A and B are diagrams for explaining the operation of the conventional connecting rod bending measuring machine shown in FIG. 7, respectively. 4... Measuring mechanism, 6... Work input port (work input section), 7... Connecting rod, 8... Work discharge port (work discharge section), 10... Pressing mechanism, 15...
...Transport belt.

Claims (1)

[Claims] 1. The bending of the conrod 7 is measured by pressing the surface of one end of the conrod 7 against the reference surface 39 of the measuring mechanism and measuring the position of the surface of the other end of the conrod 7 with respect to the reference surface 39. In the connecting rod bending measuring machine, a conveyor belt 15 that runs the connecting rod 7 input from the workpiece input port 6 and discharges it from the workpiece discharge port 8; a reference surface 39 provided above the conveyor belt 15; and the reference surface. 39 and front and rear feed rollers 37 and 38 for transporting the connecting rod 7 in its running direction; means for detecting that one end of the connecting rod 7 has been conveyed to the position of the reference surface 39; and the conveyor belt 15. a pressing mechanism 10 that is provided below the conveyor belt 15 and presses the upper surface of one end side of the connecting rod 7 conveyed by the conveyor belt 15 against the reference surface 39; A measuring arm 41 is pivotally supported above the conveying belt 15 immediately before the conveyor belt 15 so as to be swingable vertically along the conveying direction of the conveying belt 15; A measuring roller 42 is supported and rotates in contact with the upper surface of the connecting rod 7; a detection end is in contact with the upper surface of the measuring arm 41, and outputs a signal according to the position of the measuring roller 42 corresponding to the upper surface shape of the connecting rod 7. a detector 43; a signal from the detecting means for detecting that one end side of the connecting rod 7 is at the position of the reference surface 39; and the detector 4;
3. A conrod bending measuring machine characterized by comprising a processing device for checking the upper surface position of the other end side of the conrod 7 based on the output signal from the conrod 7, and determining and processing the bending of the conrod 7.