JPH0128862Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a device for sorting out dimensional variations in elongated cylindrical objects, such as pins.

Conventionally, there has been no method for selecting the length of this type of cylindrical object with high precision and high speed, and pins have been cut by press cutting or cutting and used without subsequent measurement.

Unless detection is possible at high speed and with high precision, the machining accuracy at the machining stage must be relied upon as is, and as long as the machining accuracy falls within a predetermined tolerance, there is no problem. However, when press cutting is performed by plastic working, the tool wears out as the machining time passes, and length variations inevitably occur. Therefore, it is possible to obtain pins of approximately the specified quality by taking into account variations due to tool wear and replacing the tool within the time that the variations fall within the tolerance, but it also takes time and time to replace the tool. They are expensive and need to be used for as long as possible.

Furthermore, in reality, variations in objects are not limited to processing accuracy, but may also be due to foreign matter being mixed in, so it is only necessary to include all of these and eliminate pins and the like that have all types of variations.

This invention was developed in response to the above requirements, and aims to perform 100% inspection at high speed and with high precision.It goes without saying that it eliminates foreign objects with completely different shapes, but also eliminates foreign objects with similar dimensions. In addition to the variation in the length of the cylindrical object, it is also necessary to detect the variation in the outer diameter.In addition, when detecting the length, it is necessary to detect the cylindrical object that is outside the tolerance, rather than simply sorting into two types: within the tolerance and outside the tolerance. Even if there is one, it is sorted by separating it into large and small parts based on standard tolerances.

Hereinafter, one embodiment of the sorting device according to the present invention will be described in detail based on the drawings, taking a pin as an example.

To explain the outline of the sorting device according to the present invention, the pins 1 are carried on the screw 2 by rotation of the screw 2, and the pins 1 placed on the pin holder 6 are moved by minute movements in the axial direction of the cam 4. Sort the length by.

FIG. 1 shows one embodiment of the screw 2, in which both ends of the screw 2 are rotatably supported by ball bearings, and one end has a pin holder 6.
and a cam 4 is attached to the two screw shafts,
The cam 4 rotates together with the two screw shafts, but the cam floor 5 is fixed to the main body frame 7.
However, as the cam 4 rotates, it slightly slides in the axial direction. That is, the cam 4 is pressed against the side surface 19 by the spring 20, and the cam floor 5 contacts the surface 2.
1 by slightly changing it, for example, 3 as shown in Figure 2.
Divide and find the relationship between each dimension H1, H2, H3.
By setting H1>H2>H3, the cam 4 is attached to two screw shafts so that it slides in the axial direction as the cam 4 rotates.

Figure 2 shows the cross section of each part of the surface 21 that the cam floor 5 contacts, and as shown in the figure, by slightly protruding toward the surface 21 side, the thicknesses H1, H2, and H3 are reduced. It is increasing and decreasing. Therefore, since the surface 21 of the cam 4 rotates while contacting the cam floor 5, the cam 4 moves in the axial direction of the two screw shafts by the amount of increase/decrease in the thicknesses H1, H2, and H3. .

Further, a notch 8 is provided on the outer periphery of the pin holder 6 into which the pin 1 carried by the screw 2 is fitted, and a narrow groove 12 is cut in the center of the side surface. A claw 1 whose one end is pivotally supported by a pin 13 and whose other end is supported by a spring 14
5 is attached.

Screw 2 is connected to pin 1 as shown in Figure 4.
Screw-shaped screw thread 9 with a pitch corresponding to the length
The pin 1 is arranged parallel to the axial direction between the screw threads 9, and when the screw 2 rotates, the pin 1 moves along the lead plate 3.

By the way, this device has pin 1 of the screw 2.
The outlet side (the right side in Figure 1) is installed at an appropriate height and inclined, and the receiver 16 for the pin 1 is provided on the left side.
Pins 1 of different lengths and thicknesses are inserted into the receiver 16 (see FIG. 5). When the screw 2 rotates, the pin 1 in the receiver 16 fits into the screw 2 and fits between the screw threads 9,
It is guided and carried towards the exit direction (right side in Figure 1). A lead plate 3 is provided on the top of the screw 2 parallel to the axis to also serve as a pin storage, and the pin 1 is carried along the lead of the screw 2 using the lead plate 3 as support.

If a thickness selection tool is attached to the middle of the screw 2 with a certain gap between the screws 2, the thick pins 1 will collide with the selection tool and fall from the screw. Therefore, only pins 1 having a regular thickness or pins 1 smaller than the standard thickness pass through the sorting tool and are guided to the second end of the screw.

Here, between the sorting tool and the screw 2,
It may be something like a plate material arranged at a predetermined interval. Conversely, it is also possible to directly use the lead plate 3 to select the thickness; in this case,
If a portion is formed in which the distance between the lead plate 3 and the screw 2 is partially increased, the pin 1 that has moved along the lead plate 3 will fall only as a thin pin at the said portion.

The pin 1 guided to the end of the screw 2 is placed on the notch 8 of the pin holder 6, but the pin holder 6 rotates at the same time as the screw 2.
The claw 15 in the state shown in FIG. 6a is held down by the claw presser 17 as it rotates, and becomes as shown in FIG. 6b, and the pin 1 is placed in this state. however,
If the cam 4 is simply placed on the pin holder 6 as described above, it will fall as it rotates, so a stopper pin 18 is attached to the cam 4, and the cam 4 is placed on the pin holder 6 by sliding in the axial direction. The pin 1 is held down and clamped with the stopper pin 18.
As the screw 2 rotates, the pin 1 carried along the lead plate 3 is pushed out from the end of the screw and placed on the pin holder 6. At the same time, the stopper pin 18 is attached to an appropriate position on the cam 4 so that the stopper pin 18 can clamp the pin 1 in a timely manner.

FIG. 6 above shows the state in which the pin 1 is placed on the pin holder 6. Before the pin 1 is placed on the pin holder 6, the claw 15 is pushed up by the spring 14 and rotated as shown in a. are doing. Before the pin 1 is sent from the screw 2, the claw 15 is pressed down by the claw presser 17, and when the state b is reached, the pin 1 can be placed on the pin holder 6.

At the same time that the pin 1 is placed on the pin holder 1, the end surface of the pin 1 is pressed by a stopper pin 18 attached to the cam 4, and the pin 1 is held and clamped between the two ends of the screw. Therefore, the clamped pin 1 will rotate together with the pin holder 6.

However, if the length of the pin 1 is shorter than the standard size, the pin 1 cannot be clamped, and the claw 1
If the pin 5 is disengaged from the claw presser 17 as the pin holder 6 rotates, the short pin 1 will be blown away by the force of the spring 14, which constantly acts to lift the claw 15. Therefore, first, short pins 1 are selected.

On the other hand, a pin 1 of regular size and a relatively long pin 1
Since the cam 4 is clamped by the stopper pin 18, it rotates while resting on the pin holder 6 by a predetermined angle, but when it rotates to a certain position (angle), the cam 4 returns even slightly. This amount of return is pin 1
The amount falls within the tolerance range for the length, and by the return sliding of the cam 4, the regular pins 1 are blown off and sorted out. However, although the long pin 1 is still clamped on the pin holder 6, the cam 4 slides back after further rotation by a certain angle, and the long pin 1 is thrown off by the claw 15.

The pins 1 thrown out at each rotational position are collected at a predetermined location, and pins 1 of regular length and both short and long pins can be separately sorted based on the pins 1.

FIG. 7 shows that the pin 1 sent from the screw 2 is placed on the pin holder 6, and the stopper pin 18 is placed on the pin holder 6.
It is in a state of being pressed by. The stopper pin 18 is fixed to a cam 4, which can move slightly in the axial direction of the screw shaft 22, and the pin 1 is clamped by the action of a spring force that presses the cam 4 in the direction of the screw 2. has been done. Therefore, in this state, the cam floor 5 is not in contact with the surface 21 of the cam 4 and has a gap 23. In this state of the pin 1, the screw 2, the pin holder 6, and the cam 4 rotate, but since the surface 21 of the cam 4 is smoothly undulating as shown in FIG. The gap 23 between them becomes smaller and they finally come into contact. When the surface 21 comes into contact with the cam floor 5, the cam 4 is pushed out in the direction of the arrow, and the stopper pin 1 is pushed out.
A gap is also created between the pin 8 and the pin 1, the clamp on the pin 1 is released, and the pin 1 is thrown away from the pin holder 6 by the claw 15.

As mentioned above, the sorting device according to the present invention is
A cam 4 that carries the pin 1 by the screw 2 and slides the pin placed on the pin holder 6 in the axial direction.
By this movement, the pin 1 clamped by the stopper pin 18 is released and the length is sorted, and furthermore, in the middle of the screw 2, a certain gap is provided between the screws 2, and the attached sorting tool can be used to sort the thickness. It is something that

Therefore, the sorting method of this apparatus is mechanical sorting, and the sorting accuracy, that is, the reliability of the sorting, is very high, and moreover, it is possible to employ a high-speed 100% measurement method. Therefore, a very large number of pins 1, such as a power transmission roller chain,
It is very suitable for measuring pins 1 of silent chains, etc., and by using pins 1 with high dimensional accuracy, the quality and performance of products that use pins 1 as one of their components can be greatly improved.

Furthermore, although this sorting method was described in the embodiment in which three types of crabs were sorted, this is only due to the shape of the cam 4, and the shape, that is, the axial sliding cycle of the cam 4 By changing 2
This is an excellent device that has never been seen before, as it is capable of sorting by type, or conversely, into 4, 5, and so on.

[Brief explanation of drawings]

Fig. 1 shows the sorting device according to the present invention, Fig. 2 shows the surface shape of the cam used in this device, Fig. 3 shows the pin holder, Fig. 4 shows the screw, and Fig. 5 shows the screen. 6 shows a state in which the pins are placed on a pin holder, and FIG. 7 shows a state in which the pins are clamped by a stopper pin. 1... Pin, 2... Screw, 3... Lead plate, 4... Cam, 5... Cam floor, 6...
Pin holder, 7... Body frame, 8... Notch, 9... Screw thread, 12... Groove, 13... Pin,
14...spring, 15...claw, 16...receiver, 1
7...Claw holder, 18...Spring, 19...Side,
20... Spring, 21... Surface, 22... Screw shaft, 23... Gap.

Claims (1)

[Scope of utility model registration request] A screw having a screw thread of a pitch approximately corresponding to the length of the cylindrical object is arranged at an angle, and a receiver is provided below the screw to serve as a storage section for the cylindrical object. A lead plate for feeding the cylindrical object is placed on the screw, and a pin holder with a claw attached to the screw so as to be constantly protruded by the action of a spring is attached to the end of the screw, and the outer periphery of the pin holder is A claw holder is arranged to hold down the protruding claw with spring force, and a cam is provided on the screw shaft with a degree of freedom in the axial direction, and a spring force is applied to the cam to press it toward the screw. One side of the cam is smoothly raised and lowered so that the cam floor fixed to the main body frame can come into contact with the surface, and a stopper pin that protrudes from the end face of the cam toward the pin holder is connected to the cam with the screw end. A sorting device for cylindrical objects, characterized in that the cylindrical objects are fixed at a position where the cylindrical objects can be held between them.