JP3772337B2 - Transport device - Google Patents

Description

[0001]
[Industrial application fields]
The present invention relates to a workpiece conveying device having a circular outer peripheral surface, and more particularly to a workpiece continuous grinding apparatus having a two-roll one-shoe workpiece holding device.
[0002]
[Prior art]
Workpiece with circular outer peripheral surface taken out from the bottom end of one vertical inshoot and held and rotated by two rolls that rotate after being conveyed to the grinding position A conveying device in a grinding apparatus that grinds the inner surface of the workpiece is placed at the grinding position when conveying only one workpiece from the inshoot and holding the workpiece by two rolls at the grinding position. The ground workpiece must be removed quickly and the conveyed workpiece must be securely placed and held in the grinding position.
[0003]
In general, the workpiece is taken out from the vertical inshoot onto the conveying surface by dropping the workpiece onto the conveying surface. However, the work piece that is the lowermost end when falling is subjected to the full load of the work piece stored in the inshoot, and the conveyance direction is an open port, so the center of gravity of the work piece May shift in the transport direction, further workpieces may fall on the transport surface and two or more workpieces may be simultaneously removed from the inshoot.
[0004]
In order to prevent this, at the present time, at the falling point of the workpiece on the conveying surface, an inclination is provided in the direction opposite to the opening, or from the conveying direction toward the dropping point. Measures such as flowing coolant oil were taken. As a more reliable measure, for example, in Japanese Utility Model Publication No. 61-5555, (1) As shown in FIG. 3, the workpiece 9a jumps out in the conveying direction to the dropping point of the workpiece 9a on the conveying surface. A method of slightly projecting a member 30 such as a flexible piano wire for preventing the above is disclosed. (2) Storage for storing the workpiece 9a when it falls on the conveyance surface at the tip of the loader blade 3 that conveys the workpiece 9a on the conveyance surface as shown in FIG. There is a method for preventing two or more workpieces 9a from popping out by providing the portion 32.
[0005]
Further, with respect to the removal of the ground workpiece at the grinding position and the arrangement of the workpiece before grinding, as shown in FIG. 5, a pressing member 34 such as a piano wire or a leaf spring is provided in advance by the workpiece 9a. By arranging so as to be pressed against the rotary roll 1 and the shoe 12, the unworked workpiece 9 a conveyed by the loader blade 3 presses the pressing member 34 to open the discharge path of the ground workpiece 9 b. Further, the workpiece 9b is pushed out to the discharge path by the workpiece 9a to remove the workpiece 9b, and the workpiece 9a before grinding is pressed against the rotary roll 1 and the shoe 12 by the pressing member 34. It was placed and held.
[0006]
[Problems to be solved by the invention]
However, in the prior art (1), the setting adjustment of the flexible member 30 is delicate and it is difficult to reliably eliminate the protrusion of the workpiece due to an adjustment error, and at the same time, the deformation of the flexible member is difficult. Therefore, there was a problem that maintenance in a considerably short period was required. In (2), there is no problem in preventing the workpiece from jumping out of the inshoot, but the pressing member 34 is always excessively deformed when the workpiece is held at the grinding position. There was a problem.
[0007]
Furthermore, when the pressing member 34 is always pressed against the workpiece, it is difficult to maintain a stable pressing force for a long period due to frictional heat or wear due to friction with the workpiece. In the case where the workpiece is slightly lifted from the workpiece, the adjustment is delicate, and it is difficult to reliably eliminate the workpiece removal or placement error due to an adjustment error.
[0008]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, a conveying apparatus according to the present invention intermittently takes out a workpiece from an inshoot in which one or more workpieces having a circular outer peripheral surface are stored, and further determines the workpiece. A conveyance device that conveys the workpiece to a predetermined supply position, and a conveyance path that communicates with the discharge port of the inshoot through which the workpiece is discharged. A loader blade that transports the workpiece from the discharge port of the inshoot to a predetermined supply position, and the workpiece near the tip of the loader blade in the vicinity of the discharge port of the inshoot in the transport path A workpiece pop-out prevention mechanism that is biased in a direction to stop the conveyance of the workpiece that is opposed and conveyed in the conveyance path, and the workpiece is processed at a predetermined supply position that is the tip of the conveyance path Attached so that objects are held And a conveying device comprising a workpiece biasing plate being.
[0009]
In addition, the above-mentioned conveyance apparatus is good also as being used for the processing apparatus which conveys and hold | maintains a workpiece to a predetermined supply position, and also grinds to a workpiece in the said supply position.
The predetermined position where the workpiece is supplied is a position surrounded by two rotating rolls and shoes and the workpiece is processed. Further, the workpiece loading from the inshoot onto the conveying surface is not limited to the vertical direction, but may be performed from the lateral direction or the like.
[0010]
Furthermore, it is preferable that the above-mentioned workpiece pop-out prevention mechanism has a pin that can be retracted to a retreat path that communicates with the transport path and that is biased toward the transport path from the retreat path.
[0011]
The workpiece urging plate is attached to one end of a lever supported substantially at the center, and the other end of the lever faces the cam provided on the loader blade in a predetermined direction. A cam follower for rotating the lever and a spring for biasing the rotational force in a direction opposite to the predetermined direction may be attached. The workpiece biasing plate may be made of an elastic member.
[0012]
【Example】
Embodiments of the present invention will be described below with reference to the schematic cross-sectional view of the main configuration of the present invention shown in FIG. The conveying apparatus according to the present invention holds, for example, workpieces 9a, which are inner rings or outer rings of bearings, in a state where they are stacked in a line in the vertical direction, and has a discharge port 23 for the work 9a in a part of the lower end surface. 8, the lower end surface of the inshoot 8 and the upper surface of the shoe 12, that is, the conveying surface 13, the conveying path 21 communicating with the discharge port 23, and the workpiece 9 a at a predetermined workpiece holding position 22 at the leading end of the conveying path. The rotating roll 1 and the rotating roll 2 for holding and rotating, and the loader blade 3 that conveys the workpiece 9a by pushing it to the leading end of the conveying path.
[0013]
A cam surface 4 is attached to the rear portion of the loader blade 3 and outside the conveyance path 21, and the cam surface 4 is attached to one end surface of the piano wire swing lever 6 that is rotatably supported. Opposing the formed cam follower 15 and the cam surface 4 abuts the cam follower 15, the piano wire swing lever 6 is rotated in a predetermined direction (a direction away from the conveying surface 13 in the drawing of this embodiment). . The piano wire swing lever 6 is urged in a direction opposite to a predetermined direction by a spring 17 so that the piano wire swing lever 6 is held at a position before the rotation when the cam surface 4 and the cam follower 15 do not contact each other. To do.
[0014]
Further, a piano wire 16 is connected to the piano wire swing lever 6, and in conjunction with the rotation of the piano wire swing lever 6, the direction in which the rotary roll 1 and the shoe 12 are simultaneously in contact with the workpiece 9 a. Energize against. The rotation of the piano wire 16 is stopped by contact with the work 9a, but the rotation range of the piano wire swing lever 6 by the cam 4 and the cam follower 15 is slightly larger than the rotation range of the piano wire 16, As a result, the piano wire 16 is biased in the rotation direction by the elastic force of the piano wire with respect to the work 9a. The piano wire swinging lever 6 is controlled to rotate at a desired swinging angle by a stop pin 25.
[0015]
Further, in the vicinity of the discharge port 23 of the inshoot 8, the load 9 is substantially opposed to the loader blade 3 through the work 9 a dropped from the discharge port 23 of the inshoot 8 onto the transfer surface 13. A workpiece pop-out prevention pin 10 for preventing the movement is provided. The workpiece pop-out prevention pin 10 is disposed in a retraction path provided at the lower portion of the inshoot for retreating when the work 9a is conveyed by the loader blade 3, and is moved in the conveyance path direction by the spring 16 via the work holding pin lever 11. Energized to prevent the workpiece 9a from moving. Further, the end surface of the workpiece 9a is guided by the front plate 26.
[0016]
As shown in the enlarged view of the vicinity of the discharge port 23 of the inshoot 8 in FIG. 2, the work 9 a on the transport surface 13 is dropped at the point where the work 9 a does not depend on the loader blade 3 when dropped. In order to prevent the protrusion of the workpiece, a slope 14 is provided in a direction opposite to the workpiece holding position 22.
[0017]
Next, the conveying operation of the workpiece 9a of the apparatus according to the present invention will be described.
In the state before conveyance, the workpiece 9a is in contact with the conveyance surface 13, and at the same time, the workpiece 9a is also in contact with the tip of the loader blade 3 at the initial position due to the effect of the inclined surface 14. The workpiece pop-out prevention pin 10 protrudes into the conveyance path 21 by the urging force of the spring 18 to prevent the workpiece 9a from moving in the conveyance direction on the conveyance surface 13.
[0018]
The cam surface 4 provided at the rear portion of the loader blade 3 is not in contact with the cam follower 15, the piano wire swing lever 6 is in a state before being rotated by the biasing force of the spring 17, and the piano wire 16 is in a workpiece holding position. 22 is located away from the workpiece 9b.
[0019]
At this time, the work 9b held at the work holding position 22 by the rotary roll 1, the rotary roll 2 and the shoe 12 is rotated by the rotary rolls 1 and 2, and grinding is performed.
[0020]
When the grinding process is completed, the rotation of the rotating roll 1, the workpiece 9b, and the rotating roll 2 is stopped. Subsequently, the rotary roll 2 is pulled up in a direction away from the workpiece 9b by a swing cylinder (not shown). The work holding position 22 is set not at the top of the circumference of the rotary roll 1 but at a slightly inclined portion toward the shoe 12, and the work 9 b is supported by the shoe 12 even when the rotary roll 2 is separated. It stops at the work holding position 22.
[0021]
Next, the loader blade 3 starts to advance toward the work holding position 22 by a cylinder (not shown) attached to the rear part. The workpiece 9 a that has been in contact with the tip of the loader blade 3 is pushed by the loader blade 3 and conveyed toward the workpiece holding position against the biasing force applied to the workpiece pop-out prevention pin 10 by the spring 18. The workpiece 9c held immediately above the workpiece 9a in the inshoot 8 falls in the direction of the conveyance surface 13 when the conveyance of the workpiece 9a starts, but is supported by the upper surface of the loader blade 3 and held at this position in the inshoot 8. Is done.
[0022]
As the loader blade 3 moves forward, the piano wire swing lever 6 rotates against the spring 17 when the cam follower 15 rides on the cam surface 4, and the piano wire 16 is pressed against the work 9b with this rotation. . Further, as the loader blade 3 continues to advance, the work 9a comes into contact with the piano wire 16 in contact with the work 9b, and the piano wire 16 is bent in a direction away from the work 9b. At this stage, the workpiece 9b is still held at the workpiece holding position 22 by the effect of the inclined surface of the rotary roll 1.
[0023]
The work 9a is further advanced to contact the work 9b while the piano wire 16 is bent, the work 9b is pushed out from the work holding position 22 in the direction of the apex of the rotary roll 1, and the work 9b is dropped in a direction away from the shoe 12. Subsequently, the work 9 a falls from the conveying surface 13 to the work holding position 22 by the action of the elastic force of the piano wire 16 and gravity, and is held in a form sandwiched between the rotary roll 1, the shoe 12 and the piano wire 16. Although the workpiece 9b is housed in an unloading chute (not shown), the unloading chute may be dropped using a vacuum suction arm.
[0024]
After the workpiece 9a is held at the workpiece holding position 22, the loader blade 3 is moved back toward the initial position by a cylinder (not shown). When the cam surface 4 and the cam follower 15 are separated from each other, the piano wire swing lever 6 returns to the state before the rotation by the spring 17, and the piano wire 16 is also separated from the work 9a. The next workpiece 9c falls on the transport surface 13 when the loader blade 3 returns to the initial position. At this time, the work 9c is held in contact with the tip of the loader blade 3 in the transport path 21 by the workpiece pop-out prevention pin 10 protruding into the transport path 21 by the inclined surface 14 and the urging force of the spring 18 again. Machining of the workpiece 9a is started, and conveyance of the workpiece 9c is started after the machining is completed.
[0025]
In this embodiment, only the case where the workpiece 9a is supplied in the vertical direction has been described. However, the supply direction of the workpiece is not particularly limited, and supply from the lateral direction or the like may be used. The piano wire 16 is not particularly limited as long as it is a flexible elastic material.
[0026]
【The invention's effect】
According to the present invention, in a two-roll one-shoe workpiece holding device, a workpiece pop-out prevention mechanism is provided in the vicinity of the lower portion of the inshoot, and when the workpiece is supplied to the machining position, a loader blade and a rotating roller are used. By providing a mechanism that urges the work piece in the direction in which the work piece is held to prevent the work piece from jumping to the unloading side and acts only during loading, two pieces of the work piece are provided. Prevent feed or loading mistakes.
[Brief description of the drawings]
FIG. 1 is a schematic diagram showing the configuration of a transport apparatus according to the present invention.
FIG. 2 is an enlarged view of a main part showing an outline of a configuration of a transport apparatus according to the present invention.
FIG. 3 is a diagram showing an example of a schematic configuration in the prior art of a workpiece pop-out prevention mechanism at a lower portion of an inshoot.
FIG. 4 is a diagram showing an example of a schematic configuration in the prior art of a workpiece pop-out prevention mechanism at a lower portion of an inshoot.
FIG. 5 is a diagram showing an example of a schematic configuration in the prior art of a loading error prevention mechanism at a processing position of a workpiece.
[Explanation of symbols]
1, 2: Rotating roll 3: Loader blade 4: Cam surface 6: Piano wire swing lever 8: Inshoots 9a, 9b, 9c: Work 11: Work holding pin lever 12: Shoe 13: Work conveying surface 14: Slope 15: Cam follower 16: piano wire 17, 18: spring 21: transport path 22: work holding position 23: discharge port 25: stop pin 26: front plate 30: flexible member 34: pressing member

Claims (4)

The work piece is intermittently taken out from an inshoot in which one or more work pieces having a circular outer peripheral surface are stored, and the work piece is further surrounded by two rotating rolls and shoes. And in a transport device that transports the workpiece to a predetermined supply position where the workpiece is processed ,
A conveyance path communicating with the discharge port of the inshoot from which the workpiece is discharged, and the workpiece being conveyed to the predetermined supply position;
A loader blade that conveys the workpiece from the discharge port of the inshoot to the predetermined supply position in the conveyance path;
In the vicinity of the discharge port of the inshoot in the conveyance path, the workpiece to be conveyed in the conveyance path is opposed to the tip portion of the loader blade via the workpiece. A workpiece pop-out prevention mechanism that is biased in the direction of stopping;
The workpiece contacts with the workpiece at the predetermined supply position that is the tip of the conveyance path , and the workpiece contacts the workpiece in a predetermined direction simultaneously with the two rotating rolls and the shoe. A workpiece biasing plate made of an elastic body for applying a biasing force ;
A cam surface fixed to the loader blade;
A swing lever supported rotatably so that one end of the workpiece biasing plate is fixed to one end and a cam follower facing the cam surface is fixed to the other end;
One end is fixed to the swing lever, and a spring that biases the swing lever to rotate the swing lever in a direction opposite to the predetermined direction,
In response to the operation of the loader blade moving the workpiece from the discharge port of the inshoot to the predetermined supply position, the cam surface and the cam follower come into contact with each other and then the predetermined direction via the cam follower. And the workpiece biasing plate applies a biasing force to hold the workpiece at the predetermined supply position with respect to the workpiece. . The conveyance according to claim 1, wherein the workpiece pop-out prevention mechanism has a pin that can be retreated to a retraction path that communicates with the conveyance path and that is biased toward the conveyance path from the retraction path. apparatus. The workpiece biasing plate, the at the time of forward movement of the loader blades to prevent jumping out of the workpiece blocking the transport path outlet, during retraction of the loader blade opens the anti shoe side space of the two rotating rolls The conveying apparatus according to claim 1, wherein a discharge passage for the workpiece is formed . Using the transfer apparatus according to any one of claims 1 to 3 and held by conveying the workpiece to the predetermined feed position, is subjected to grinding to the workpiece at the predetermined supply position A processing method characterized by

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