JPH0453883Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a workpiece loading and indexing device that is capable of loading a workpiece such as a gear part while indexing its position.

(Prior art) When performing work such as attaching a tooth-shaped workpiece (hereinafter referred to as a workpiece) such as a gear part to a spindle, the workpiece that flows through a slope chute stops at an arbitrary position, so the position of the tooth is (Direction) will be different for each one. For this reason, when this work is conveyed to the main shaft by a loader, the main shaft side and the teeth may not be in phase. If the phases of the two do not match in this way, it cannot be installed as is, so rotate the spindle several times to shift the phase, and use the spring force of the loader to press the workpiece against the spindle side to align the phase between the workpiece and the spindle. It turns out.

(Problem to be solved by the invention) If the phase alignment of the workpiece is performed every time on the spindle in this way, it takes time to attach the workpiece, and the cycle time becomes longer. Furthermore, if the phases of the workpieces cannot be aligned at once, this operation must be repeated as many times as necessary until the phases are aligned, which causes a problem of variations in cycle time. The applicant has devised a means for positioning a workpiece such as a spline, and has already filed a patent application (see Japanese Patent Laid-Open No. 189735/1983). The present invention has been made for the purpose of providing a device having a structure different from that of the above-mentioned publication when the workpiece is a gear part or the like.

(Means for Solving the Problems) The present invention, as a means for achieving the above object, uses an indexing device for a workpiece 3 as shown in FIG.
A stopper 12 is provided at the lower end of the gradient chute 7 that rolls and conveys (gear parts having tooth grooves 2), and a conveyance path 14 facing upward is provided in front of the stopper 12.
In addition, a cylinder mechanism 15 for raising the workpiece 3 along the conveyance path 14 is provided inside the conveyance path 14, and a cylinder mechanism 15 is provided inside the conveyance path 14 to raise the workpiece 3 along the conveyance path 14. The pin 20 is biased in the projecting direction, and on the other side are provided index pins 21, some of which are arranged at irregular intervals.

(Function) With this configuration, the workpiece 3 moves on the slope chute 7, and the slope of the slope chute 7 and the workpiece 3
The workpiece 3 rolls downward due to its own weight, and this rolling workpiece 3 comes into contact with the stopper 12 located at the lower end of the gradient chute 7 and stops once, and then is stopped by the cylinder mechanism 15. It will rise along the conveyance path 14, but at this time, it will be pushed to one side of the conveyance path 14 by the pin 20 which is biased in the direction of protruding into the inside of the conveyance path 14, and this pushed The workpiece 3 maintains the same phase while the tooth grooves 2 of the workpiece 3 sequentially mesh with the index pin 21 provided on the opposite side.

(Embodiment) Next, an embodiment of the present invention will be described with reference to the drawings. In FIG. 1, 1 is an indexing device according to the present invention, and as shown in FIG. The position of the workpiece 3 is determined when it is attached to the spindle 4. The indexing device 1 is installed in a part of a loading device 5 as shown in FIG. It is something that exists. The carry-in device 5 receives the work 3 from the slope chute 7 side of the indexing device 1 according to the present invention on the left side in the figure, and carries out the work 3 to the slope chute 8 side on the right side in the figure.
9 is a loader for attaching the workpiece 3 indexed by the indexing device 1 to the main spindle 4; 10 is a loader for carrying out the processed workpiece 3 from the main spindle 4 to the carry-out chute 8.

As shown in FIG. 1, an L-shaped stopper 12 is rotatably provided at the lower end of the gradient chute 7 and rotates about a shaft 11, and also functions as a striker. A proximity switch 13 is provided at the bottom of this stopper 12, and a proximity switch 13 is provided at the bottom of the stopper 12.
When the workpiece 3 comes into contact with the stopper 12 and rotates counterclockwise about the shaft 11, it is electrically detected that the workpiece 3 has come to this position.

At the lower end of the slope chute 7, there is a conveyance path 1 facing diagonally upward so as to intersect with the slope chute 7.
4 is provided, and a cylinder mechanism 15 for raising the workpiece 3 is provided below the conveyance path 14. This cylinder mechanism 15 is hydraulically operated. A push-up plate 17 is attached to the tip of the rod 16 of the cylinder mechanism 15, and when the cylinder mechanism 15 operates, it acts to push up the workpiece 3 diagonally upward from below. Note that the height position of this push-up plate 17 is designed to maintain the same level as the slope chute 7 in a standby state in which the cylinder mechanism 15 does not operate.

A gate block 18 is provided on one side of the gradient chute 7 above the part of the transport path 14 that intersects with the gradient chute 7, and a spring 19 is attached to the upper end of the gate block 18 to prevent the transport path 14 from intersecting with the gradient chute 7.
Pin 2 urged to protrude inward
0 is set. On the other hand, on the other side of the conveyance path 14 facing the gate block 18, a pin mounting plate 22 is provided with a fixed block 18' and a plurality of index pins 21, some of which are arranged at irregular intervals. There is. In this embodiment, the lower interval is slightly larger than the upper interval, and details of this part will be described later.

As will be described later, the index pin 21 has a circular protrusion, and its diameter is equal to the tooth space 2 of the workpiece 3.
It is made to be suitable for meshing with. Conveyance path 7
A work stopper plate 23 is provided at the upper end of the
When the workpiece 3 is raised to the highest position of the cylinder mechanism 15, inertia or the like prevents it from rising further.
In addition, an arm-shaped striker 25 that rotates around the base end 24 is provided near the lower part, and when the workpiece 3 rises to the highest position of the cylinder mechanism 15, it is pushed by the workpiece 3. It is designed to rotate counterclockwise. A proximity switch 26 is also provided on the back of the striker 25, and is used to check the elevated position of the workpiece 3.

In FIGS. 4 and 5, the pitch is 1.27a between the two indexing pins 21 at the initial indexing position (lower part in FIG. 1), and the pitch is a between the other two.
This shows that the intervals are different. FIG. 7 is a plan view of FIG. 5, showing the relationship between the index pin 21 and the pin mounting plate 22. If all the indexing pins 21 are spaced equally, even if the cylinder mechanism 15 pushes out the workpiece 3 when the tip of the workpiece 3 rides on the first indexing pin 21, all the indexing pins 21 The tip of the tooth will rest on the pin 21, making indexing impossible. However, as shown in the figure, when the pitch between the first index pin 21 and the next index pin 21 is made larger than the tooth space pitch a of the workpiece 3 (see Figure 6)
In this case, even if the tip of the workpiece 3 rides on the first indexing pin 21, the pitch is different from that of the next indexing pin 21, so the tip of the workpiece 3 does not ride on the indexing pin 21 and indexing can be performed. It becomes.

This device constructed as described above operates as follows. First, consider the case where the workpiece 3 is inserted into the main shaft 4 (see FIG. 3) with the tooth spaces 2 aligned in phase. In this case, the machine supporting the spindle 4 is located on the right side of the illustrated indexing device 1, and the spindle 4 is positioned perpendicular to the plane of the paper (see FIG. 3). The cylinder mechanism 15 is placed in the standby state shown in the figure, and the workpiece 3 is rolled from above the gradient chute 7 toward the lower right. This rolling is performed by the inclination of the gradient chute 7 and the weight of the workpiece 3. When the workpiece 3 comes into contact with the stopper 12, the proximity switch 13 detects this and operates the cylinder mechanism 15 by a control circuit (not shown). When the workpiece 3 moves along the conveyance path 14 by the operation of the cylinder mechanism 15 and rises diagonally upward to the right in the figure, the pin 20 biased in the protruding direction by the spring 19 The tooth groove 2 of the workpiece 3, which was pushed to the right at
1 will mesh sequentially. In this case, as described above, the index pins 21 arranged downward are slightly wider apart than those arranged upward, and since there is no uniformity in the intervals as a whole, the index pins 21 can be arranged in any direction. When the rolling workpiece 3 engages with the index pin 21, its orientation is aligned. The direction of the workpiece 3 is aligned in this way, and the workpiece 3 stops at the rising end of the cylinder mechanism 15, and pushes the striker 25 to rotate it. This movement is detected by the proximity switch 26 and is inserted into the main shaft 4 by the loader 9 shown in FIG.

When operating in this manner, the cylinder mechanism 15 rises at a slow speed (fine movement). Therefore, when the workpiece 3 moves up within the conveyance path 14, the gate block 18 and the fixed block 18' provided a predetermined distance apart from the gate block 18 (distance corresponding to the outer diameter dimension of the workpiece 3) The accuracy of the outer diameter of the workpiece 3 is checked at the stage where it passes through the part, and at the same time, the presence or absence of burrs is checked. After this check, the workpiece 3 is smoothly engaged with the index pin 21 due to the inclination of the conveyance path 14. When it rides on the top of the index pin 21 during the engagement process, it is given a back spin by the pin 20 provided on the opposite side and biased in the projecting direction, and is brought into engagement with the index pin 21. After that, when you are still on the top of the index pin 21,
Since the index pins 21 are misaligned, they will be automatically aligned.

(Effects of the invention) Since the present invention is configured as explained above, there is no need to perform position indexing manually as in the past, making work smoother and significantly shortening cycle time. will be done. Since the indexing speed can be freely changed by hydraulic control of the cylinder mechanism, adjustment and maintenance work is also facilitated. Furthermore, by using this device, the height of the workpiece entrance can be made lower than in the past, so that a sufficient height of the chute from the previous process can be taken.

[Brief explanation of drawings]

FIG. 1 is a side view showing essential parts of an embodiment of the present invention, FIG. 2 is a sectional view of a workpiece, and FIG. 3 is a side view of a loading/unloading device equipped with the indexing device shown in FIG.
Figure 4 is a front view showing the attachment part of the index pin;
5 is a side view of the device shown in FIG. 4, FIG. 6 is an explanatory diagram illustrating the meshing relationship between the index pin and the workpiece, and FIG. 7 is a plan view of the device shown in FIG. 5. 1... Indexing device, 2... Tooth groove, 3... Workpiece, 4... Main shaft, 7... Gradient chute, 12...
Stopper, 14... Conveyance path, 15... Cylinder mechanism, 20... Pin, 21... Index pin.

Claims (1)

[Scope of utility model registration request] A stopper for the workpiece is provided at the lower end of the gradient chute, a conveyance path directed upward is provided in front of the stopper, and a cylinder mechanism for raising the workpiece along the conveyance path is provided within the conveyance path, and the conveyance path A pin biased in the protruding direction is provided on one side of the portion above the portion intersecting the slope chute, and index pins partially arranged at irregular intervals are provided on the other side. Workpiece loading and indexing device.