JPS634589Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a workpiece feeding device for a centerless grinder.

(Prior art) As shown in FIG. 1, a centerless grinding machine is usually composed of a grinding wheel 1, an adjusting wheel 2, and a receiving plate 3, and a workpiece (workpiece) 4 is moved between the two wheels 1 and 2. The grinding wheel is supported by a receiving plate 3 in the processing section 5, and the center-to-center distance between the two wheels 1 and 2 is reduced, and the grinding is performed by rotation in the direction of the arrow in the figure. (For example, such a device is shown in Japanese Unexamined Patent Publication No. 109259/1983). During machining, it is necessary to feed the workpiece 4 to the machining section between the two cars 1 and 2, and there is a known method in which this workpiece is fed by a loading arm equipped with a pin. It is being However, in this case, when the workpiece becomes small, it becomes extremely difficult to extract the workpiece in the processing section, and there is a problem in that the workpiece cannot be reliably supplied and the workability deteriorates.

(Purpose of the invention) The object of the invention is to provide a workpiece feeding device configured to smoothly and reliably feed and discharge a workpiece in a centerless grinding machine as described above. It is.

(Structure of the invention) The workpiece feeding device of the grinding machine of the invention includes a grinding wheel for grinding the outer periphery of the workpiece, an adjustment wheel disposed opposite to the grinding wheel, and a workpiece in the processing section between these two wheels. A supply chute, which is attached to a grinding machine equipped with a receiving plate that supports the workpieces from below, holds the workpieces inputted from above in order, and has a lower end opening on one side of the processing section; a discharge chute whose upper end is opened on the other side of the processing section and discharges the processed workpiece downward; a position where the workpiece at the lower end of the supply chute is moved to the processing section; and a position where the workpiece at the processing section is transferred to the upper end of the discharge chute. a two-stage extendable pusher that can move the workpiece to a position; and a stopper surface that is movable back and forth in the chute discharge direction at the upper end of the discharge chute and that holds the workpiece in contact with the side surface on the discharge chute side of the workpiece in the processing section. and an eject surface for ejecting the workpiece at the upper end of the ejection chute into the ejection chute by its forward movement; The stopper member drive device operates to move the stopper member to the backward position when moving the workpiece in the section, and to move the stopper member to the forward position when ejecting the workpiece to the ejection chute. .

(Embodiment) Hereinafter, the workpiece feeding device for a grinding machine of the present invention will be explained based on the embodiment shown in FIGS. 2 to 5.

As the grinding machine in this embodiment, the one shown in FIG. 1 is used. That is, this grinder is
A grinding wheel 1 for grinding the outer periphery of the workpiece 4, an adjustment wheel 2 disposed opposite to the grinding wheel 1, and a receiving plate 3 for supporting the workpiece 4 from below in a processing section 5 between these two wheels 1 and 2. It is composed of.

In this grinding machine, a workpiece (i.e., a workpiece) for supplying the workpiece 4 to the processing section 5
The supply device includes a supply chute 6 that supplies the workpiece 4 to one side of the processing section 5, a discharge chute 7 that discharges the processed workpiece 4 downward, and a discharge chute 7 that supplies the workpiece 4 to the upper end of the processing section 5 and the discharge chute 7. A two-stage extension type pusher 8 that acts to move the workpiece 4, a stopper action that restricts the position of the workpiece 4 to the processing section 5, and a workpiece 4
a stopper member 9 which also functions as an ejector for ejecting the liquid into the discharge chute 7;
The stopper member driving device 10 drives the stopper member.

The supply chute 6 is composed of a vertically elongated cylindrical body whose lower end is open on one side of the processing section 5 of the grinding machine,
The workpieces 4, 4, etc. that are introduced from above are held in order, and the workpieces 4 are transferred one by one from the lower end opening to the processing section 5.
It is arranged so that it is supplied to one side.

The discharge chute 7 has an upper end open on the other side of the processing section 5 and is configured as a gutter-like body extending obliquely downward.

The pusher 8 is constituted by a shaft-shaped body that moves horizontally above the receiving plate 3, and is driven by a drive device 11 consisting of a supply cylinder 12 and a discharge cylinder 13 that are integrally connected in the axial direction. It's getting old. That is, the pusher 8 is connected to the ejection cylinder 13.
The piston 15 is moved by the piston 14 of the supply cylinder 12 by the workpiece supply stroke _l1 , and then moves by the workpiece discharge stroke _l2 . Due to this operation, the pusher 8 can take a position in which it moves the workpiece 4 at the lower end of the supply chute 6 to the processing section 5 and a position in which it moves the processed workpiece 4 in the processing section 5 to the upper end of the discharge chute 7. be. Note that both cylinders 12 and 13 are driven by hydraulic pressure, and hydraulic control is performed by switching valves 16 and 17, respectively.

The stopper member 9 has its lower end pivotally connected to a pivot shaft 18, and is movable (that is, rotatable) back and forth in the chute discharge direction at the upper end of the discharge chute 7, and has a processing section at its upper end. The stopper surface 19 that holds the workpiece 4 in contact with the side surface of the workpiece 4 on the ejection chute side located at 5 and the stopper surface 19 that holds the workpiece 4 in contact with the side surface on the ejection chute side of the workpiece 4 being processed, and its forward movement, kicks the processed workpiece 4 located at the upper end of the ejection chute 7 into the ejection chute 7. An ejection surface 20 is provided.

The stopper member driving device 10 employs a hydraulically driven ejector cylinder 21, and by connecting the piston 22 of the ejector cylinder 21 to a connecting member 23 protruding from the lower end of the stopper member 9, The stopper member 9 is made to rotate around the pivot shaft 18 in accordance with the horizontal movement of the piston 22. The connecting member 23 and the piston 22 are connected via a long hole 24 and a connecting pin 25. In addition, ejector cylinder 2
The first hydraulic control is performed by the switching valve 26.

In the drawings, reference numeral 27 is a bearing that supports the pivot shaft 18, and reference numeral 28 is a base.

The workpiece feeding device of the illustrated grinding machine operates as follows.

In the state shown in FIG.
3, and the workpiece 4 at the lower end of the supply chute 6 is moved by the pusher 8 to the processing section 5 of the grinding machine.
At this time, the stopper member 9 is
In this state, after the outer periphery of the work 4 is ground by the grinding wheel 1, the ejector cylinder 21 is operated to move the stopper member 9 backward in the direction of the arrow X in FIG. 5, and then the ejection cylinder 13 is operated to move the piston 15
4, the machined work 4 in the machining section 5 is pushed by the pusher 8 into the discharge chute 7.
Then, the ejector cylinder 21 is operated again in the opposite direction to move the stopper member 9 forward in the direction of the arrow Y, and the ejector surface 20 of the stopper member 9 kicks out the workpiece 4 into the discharge chute 7 and discharges it downward. At this time, the stopper surface 19 of the stopper member 9 is in a state of preparation for restricting the movement of the next workpiece 4. After the pusher 8 advances in the direction of the arrow Y, the feed cylinder 1
2 and the discharge cylinder 13 are operated in the opposite direction to the above to return them to the state shown in FIG.

(Effects of the invention) As described above, according to the invention, it is possible to reliably supply the workpieces (i.e., the workpieces) to the processing section of the grinding machine in sequence, and also to smoothly and quickly discharge the processed workpieces. This has the practical effect of significantly improving the workability of grinding.

[Brief explanation of the drawing]

Fig. 1 is a schematic diagram for explaining the processing method of a grinding machine, Fig. 2 is a side view of a workpiece feeding device of a grinding machine according to an embodiment of the present invention, and Figs. FIG. 5 is a view corresponding to FIG. 2 showing a state in which it is extended in stages, and FIG. 5 is a view taken in the direction of arrow A in FIG. 1... Grinding wheel, 2... Adjustment wheel, 3... Receiving plate, 4... Workpiece, 5... Processing section, 6... Supply chute, 7... Discharge chute, 8... Pusher,
9...Stopper member, 10...Stopper member drive device, 19...Stopper surface, 20...Ejector surface.

Claims (1)

[Scope of utility model registration request] Workpiece supply for a grinding machine equipped with a grinding wheel for grinding the outer periphery of a workpiece, an adjustment wheel installed opposite to the grinding wheel, and a receiving plate that supports the workpiece from below in a processing section between these two wheels. The apparatus includes a supply chute that sequentially holds workpieces input from above and has a lower end opened on one side of the processing section, and an upper end opened on the other side of the processing section and holds processed workpieces. a discharge chute that discharges downward; a two-stage extendable pusher that can take a position for moving the work at the lower end of the supply chute to the processing section and a position for moving the work at the processing section to the upper end of the discharge chute; The upper end of the discharge chute can be moved back and forth in the discharge direction of the chute, and the stopper surface that holds the workpiece in contact with the side surface of the workpiece in the machining section on the discharge chute side and its forward movement kicks the workpiece at the upper end of the discharge chute into the discharge chute. a stopper member having an ejecting surface; the stopper member is placed in a position where the stopper surface is in contact with the workpiece during the grinding process, and the stopper member is placed in the retracted position when the workpiece in the processing section is moved by the pusher; A workpiece feeding device for a grinding machine, comprising a stopper member drive device that operates to move the stopper members to a forward position when ejecting the workpiece to a discharge chute.