JP5326682B2 - Safety cover device for grinding machines - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a safety cover device in a grinding machine in which a safety cover is opened and closed by utilizing opening and closing of a front cover originally disposed in the grinding machine. <P>SOLUTION: A separate cover 34 disposed between a spindle base 13 or a tailstock 14 and a wheel spindle stock 15 covers the front side of a grinding wheel 16 during attachment and detachment of a workpiece, and is retracted behind the spindle base or the tailstock during machining of the workpiece. The separate cover is openably and closably disposed along open and close directions of the front cover 22 which is closed during machining of the workpiece and is opened during attachment and detachment of the workpiece. The separate cover and the front cover are integrally connected to each other in order to conjunctionally open and close the separate cover and the front cover. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to a safety cover device in a grinding machine in which an isolation cover provided between a rear part of a headstock or tailstock and a front side of a grinding wheel can be operated in conjunction with a front cover.

  In the grinding machine, an isolation cover is provided between the rear part of the headstock or tailstock and the grinding wheel base so that the operator does not contact the rotating grinding wheel. In general, the isolation cover is configured by a safety cover that is rotated by a cylinder device, for example, as described in Patent Document 1, and ensures the safety of the operator from the rotating grindstone when the workpiece is attached or detached. For this purpose, the front side of the grinding wheel is covered, and when the workpiece is machined, it is retracted to a position that does not hinder the machining.

Japanese Patent Laid-Open No. 53-44987

  However, in the security cover (isolation cover) described in Patent Document 1, the configuration is complicated because the security cover is configured to rotate in synchronization with the advancing and retreating operation of the ram of the tailstock. In addition, since the safety cover is disposed in the grinding fluid scattering area, there is a problem that the reliability of the machine is deteriorated such as malfunction. Further, when the workpiece is attached / detached (when not grinding), the safety cover covers the front side of the grinding wheel, so that there is a problem that the safety cover becomes an obstacle during maintenance and the maintenance work is difficult to perform.

  The present invention has been made to solve the above-described conventional problems, and a safety cover device in a grinding machine that opens and closes a safety cover by using opening and closing of a front cover originally provided in the grinding machine. Is intended to provide.

  A feature of the invention according to claim 1 is that the opening provided in the entire cover is closed when the workpiece is machined, and is opened when the workpiece is attached / detached, and grinding provided with an actuator that opens and closes the front cover In the panel, it is arranged between the headstock or tailstock and the grinding wheel base, covers the front side of the grinding wheel when the workpiece is attached / detached, and is retracted behind the spindle stock or tailstock when machining the workpiece. An isolation cover that can be opened and closed along the opening and closing direction of the front cover, and the isolation cover and the front cover are integrally connected to open and close the interlocking operation of the isolation cover and the front cover. is there.

  According to a second aspect of the present invention, in the first aspect of the invention, there is provided a connection member that integrally connects the isolation cover and the front cover, and the connection member opens and closes the isolation cover with respect to the front cover. The isolation cover and the front cover can be released from each other so that they can move relative to each other.

  According to a third aspect of the present invention, in the first or second aspect, the front cover and the isolation cover are slidably guided by the same guide rail.

  The invention according to claim 4 is characterized in that, in claim 3, the guide rail is installed on a support block fixed on a bed, and the front cover is placed on the support block along the guide rail with a constant stroke. The actuator to be slid is installed.

  According to a fifth aspect of the present invention, in the first or second aspect, an auxiliary guide rail is provided on the front cover in parallel with the guide rail, and the isolation cover is slidable on the auxiliary guide rail. It is to be guided.

  According to the first aspect of the present invention, it is disposed between the headstock or the tailstock and the grinding wheel head, covers the front side of the grinding wheel when the workpiece is attached / detached, and the headstock or the tailstock when machining the workpiece. The isolation cover retracted to the rear of the base is provided so that it can be opened and closed in a direction parallel to the front cover, and the isolation cover and the front cover are integrally connected to open and close the interlocking operation. With a simple configuration, the isolation cover can be opened and closed in conjunction with the opening and closing of the front cover. In addition, a special actuator for opening and closing the isolation cover can be eliminated, and a switch for confirming the closing and opening of the isolation cover can be dispensed with, and the number of parts can be reduced. Cost can be reduced.

  According to the second aspect of the present invention, the connecting member that integrally connects the isolation cover and the front cover is provided, and the connection member is arranged so that the isolation cover can be moved relative to the front cover in the opening / closing direction. Since the connection with the front cover can be released, during maintenance, etc., the front cover is released by releasing the connection between the front cover and the isolation cover and moving the isolation cover relative to the front cover. With the open, the isolation cover can be retracted behind the headstock or tailstock.

  According to the invention of claim 3, since the front cover and the isolation cover are slidably guided on the same guide rail, the guide structure for guiding the front cover and the isolation cover can be simplified.

  According to the invention which concerns on Claim 4, the guide rail is installed on the support block fixed on the bed, and the actuator which makes a front cover slide a fixed stroke along a guide rail is installed on the support block. Therefore, the guide rail and the actuator for guiding the front cover and the isolation cover can be moved away from the area where the grinding fluid scatters, and the reliability of the machine can be improved.

  According to the invention of claim 5, the front cover is provided with the auxiliary guide rail parallel to the guide rail, and the isolation cover is slidably guided by the auxiliary guide rail. The isolation cover can be opened and closed in conjunction with the opening and closing of the front cover with a slight modification to an existing grinding machine with a guided front cover.

1 is a front view of a grinding machine provided with a safety cover device showing a first embodiment of the present invention. It is the figure which looked at the grinding machine from the side. FIG. 3 schematically shows an operation state according to the first embodiment, and is a view showing states of a front cover and an isolation cover during machining of a workpiece. FIG. 3 schematically shows an operation state according to the first embodiment, and is a view showing states of a front cover and an isolation cover when a workpiece is attached and detached. FIG. 5 schematically shows an operation state according to the first embodiment, and is a view showing states of a front cover and an isolation cover during maintenance. It is a figure which shows the safety cover apparatus which concerns on the 2nd Embodiment of this invention. It is the figure seen from the arrow 7 direction of FIG.

  A first embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows a front view of the grinding machine 10, and FIG. 2 shows a side view.

  1 and 2, a grinding machine 10 includes a bed 11, and a table 12 is supported in front of the bed 11 so as to be slidable in the front-rear direction (Z-axis direction) as shown in FIG. On the table 12, a headstock 13 for supporting one end of the workpiece is installed. Although not shown in FIG. 2, a tailstock 14 (see FIG. 3) that supports the other end of the workpiece is separated from the headstock 13 by a predetermined amount in the Z-axis direction on the table 12. is set up. Behind the bed 11, a grindstone table 15 is supported so as to be able to advance and retract in the X-axis direction intersecting the Z-axis direction. A grinding wheel 16 for processing a workpiece is rotatably supported on the grinding wheel base 15, and the grinding wheel 16 is rotationally driven by a grinding wheel drive motor 17 installed on the grinding wheel base 15.

  As shown in FIG. 1, a fixed cover 20 that covers the front surface, both side surfaces, and the upper surface of the grinding machine 10 is fixed to the bed 11. An opening 21 is opened at the center of the front surface of the fixed cover 20 so that the workpiece can be attached to and detached from the headstock 13 and the tailstock 14. The opening 21 is opened and closed by a front cover 22, and the front cover 22 closes the opening 21 when machining the workpiece, and opens the opening 21 when attaching and detaching the workpiece. Yes.

  Next, the front cover 22 and the configuration for opening and closing it will be described. 1 and 2, a gate-shaped support block 23 is fixed on the bed 11 so as to straddle the grindstone table 15, and a guide rail 24 is installed on the upper surface of the support block 23 along the Z-axis direction. ing. A pair of first guide blocks 25 are slidably guided on the guide rails 24 with a gap in the longitudinal direction of the guide rails 24, and the rear end portion 28 of the front cover 22 is supported by the pair of first guide blocks 25. Is fixed. Accordingly, the front cover 22 can slide along the Z-axis direction by the guide rail 24. As shown in FIG. 2, the front cover 22 extends horizontally forward from the rear end portion 28 and covers the upper surface of the workpiece supported between the headstock 13 and the tailstock 14. 22a, a front wall 22b that covers the front surface of the workpiece supported between the headstock 13 and the tailstock 14, and an inclined wall 22c that connects the top wall 22a and the front wall 22b. A guide roller 26 is supported on the lower end of the front wall 22b, and the guide roller 26 rolls on a horizontal guide 27 fixed along the Z-axis direction at the front surface position of the bed 11. As a result, the front cover 22 is guided at two front and rear positions of the guide rail 24 above the grinding wheel base 15 and the horizontal guide 27 at the front surface of the bed 11 so that it can slide stably.

  On the support block 23, for example, an actuator 30 made of an air cylinder is installed along the guide rail 24, and one end of the movable portion (piston rod) 31 of the actuator 30 projects against the rear end portion 28 of the front cover 22. It is connected to the connecting bracket 32 provided. The front cover 22 is slid by a certain stroke by the actuator 30 so as to open and close the opening 21 of the fixed cover 20.

  By the way, the above-described guide rail 24 has a length longer than the length necessary for opening and closing the front cover 22, and the guide rail 24 is provided side by side with the first guide block 25, and a pair of first rails is provided. Two guide blocks 33 are slidably guided. The upper end of the isolation cover 34 is fixed to the second guide block 33. The isolation cover 34 is made of a metal plate extending in the vertical direction between the workpiece supported between the headstock 13 and the tailstock 14 and the grinding wheel 16, and the grinding wheel 16 is attached when the workpiece is attached or detached. The front side is covered and is retracted behind the headstock 13 so as not to obstruct the machining of the workpiece by the grinding wheel 16 when machining the workpiece. The front cover 22 and the isolation cover 34 described above constitute a safety cover for the grinding machine 10.

  The isolation cover 34 and the front cover 22 are integrally connected by a connecting member 35 so as not to overlap in the Z-axis direction. The isolation cover 34 is connected to the rear position of the headstock 13 in conjunction with opening and closing of the front cover 22. It is moved between the front position of the grinding wheel 16. That is, the isolation cover 34 is moved to a position that covers the front side of the grinding wheel 16 when the front cover 22 opens the opening 21 of the fixed cover 20 for attaching and detaching a workpiece, while the front cover 22 is When the opening 21 of the fixed cover 20 is closed for machining the workpiece, the fixed cover 20 is moved to the rear of the headstock 13 and retracted to a position that does not hinder the machining of the workpiece by the grinding wheel 16. .

  Both ends of the connecting member 35 are detachably connected to the front cover 22 and the isolation cover 34 by bolts 36, and the integral connection between the front cover 22 and the isolation cover 34 by the connection member 35 can be released by removing the bolt 36. It is like that. By releasing the connection by the connecting member 35, the isolation cover 34 can be moved relative to the front cover 22 manually. That is, when the opening 21 is opened by the front cover 22, the space between the workpiece position and the grinding wheel position is normally closed by the isolation cover 34, which may hinder maintenance. In such a case, the connection between the front cover 22 and the isolation cover 34 by the connecting member 35 is released, and the isolation cover 34 is manually slid on the guide rail 24 to open the position between the workpiece position and the grinding wheel position. By doing so, it is possible to perform maintenance without disassembling the front cover 22 or the isolation cover 34.

  Next, the operation in the first embodiment will be described based on the operation state diagrams of FIGS. When processing the workpiece W, as shown in FIG. 3, the front cover 22 closes the opening 21 (see FIG. 1) of the fixed cover 20, and the isolation cover 34 is retracted behind the headstock 13. The workpiece can be processed by the grinding wheel 16.

  When grinding of the workpiece is completed, the grindstone table 15 is retracted to the retracted end position. When the grindstone table 15 is retracted to the retracted end position, the actuator 30 is operated, and the front cover 22 is moved along the guide rail 24 in the right direction in FIG. At the same time, the isolation cover 34 is moved in the right direction in FIG. 3 along the guide rail 24 in conjunction with the front cover 22.

  When the front cover 22 is moved by a fixed stroke in the right direction in FIG. 3, the opening 21 of the fixed cover 20 is opened and the isolation cover 34 covers the front side of the grinding wheel 16 as shown in FIG. 4. Between the workpiece and the grinding wheel 16. Accordingly, the workpiece can be attached and detached through the opening 21 and the operator can be reliably prevented from touching the rotating grinding wheel 16. When the front cover 22 is moved by a certain stroke, this is confirmed by a front cover opening confirmation switch (not shown) and is notified to the operator by a lamp or a buzzer.

  In this state (the state shown in FIG. 4), the workpiece is attached / detached through the opening 21, and when the workpiece attachment / detachment operation is finished, the operator operates a workpiece attachment / detachment completion button (not shown). Based on this, the actuator 30 is operated in the opposite direction, the front cover 22 is moved in the left direction in FIG. 4 along the guide rail 24, and the isolation cover 34 is interlocked with the front cover 22 to guide the guide rail. 24 is moved to the left in FIG.

  When the front cover 22 is moved by a certain stroke in the left direction in FIG. 4, the opening 21 of the fixed cover 20 is closed again and the isolation cover 34 is retracted to the rear of the headstock 13 as shown in FIG. The space between the workpiece and the grinding wheel 16 is opened, and the workpiece can be processed by the grinding wheel 16. When the front cover 22 is moved by a certain stroke, this is confirmed by a front cover closing confirmation switch (not shown), and a workpiece machining start command is issued.

  By the way, when the grinding machine 10 is maintained, the opening 21 is opened by the front cover 22 as shown in FIG. 5 by releasing the connection between the front cover 22 and the isolation cover 34 by the connecting member 35. In this state, the isolation cover 34 can be moved relative to the front cover 22 in the left direction in FIG. 5, thereby opening the position between the workpiece position and the grinding wheel position. Accordingly, the operator can approach the grinding wheel 16 through the opening 21 and can easily perform maintenance work without disassembling the fixed cover 20, the front cover 22, or the isolation cover 34. become able to.

  According to the first embodiment described above, the front cover 22 is slid by the isolation cover 34 that covers the front side of the grinding wheel 16 when the workpiece is attached and detached, and is retracted to the rear of the headstock 13 when the workpiece is processed. Since the isolation cover 34 and the front cover 22 are integrally connected by the connecting member 35 so as to be slidably provided on the guide rail 24 that is movably guided and the isolation cover 34 and the front cover 22 are opened and closed in conjunction with each other, The isolation cover 34 can be opened and closed in conjunction with opening and closing of the front cover 22 with a very simple configuration.

  Moreover, since the guide rail 24 that guides the front cover 22 and the isolation cover 34 and the actuator 30 that opens and closes the guide rail 24 are installed on the support block 23 that is fixed on the bed 11 across the grinding wheel base 15, the guide rail 24 And the actuator 30 can be kept away from the area where the grinding fluid scatters. As a result, troubles caused by the grinding fluid can be avoided and the reliability of the machine can be improved.

  As a result, a special actuator for opening and closing the isolation cover 34, a switch for confirming the closing and opening of the isolation cover 34, and the like can be dispensed with, so that the number of parts can be reduced and the safety cover can be reduced. The cost of the apparatus can be reduced.

  6 and 7 show a second embodiment of the present invention. The difference from the first embodiment described above is that the front cover 22 and the isolation cover 34 are different in the first embodiment. In the second embodiment, a guide rail (auxiliary guide rail 40) for guiding the isolation cover 34 is provided on the front cover 22 in the second embodiment. Note that the same components as those in the first embodiment are denoted by the same reference numerals, and description thereof is omitted.

  In FIG. 6, a rear wall 22 d parallel to the front wall 22 b is suspended from the rear end portion 28 of the front cover 22 to a height that does not hinder the machining of the workpiece by the grinding wheel 16. As shown in FIG. 7, the auxiliary guide rail 40 is fixed to the rear wall 22d in a direction parallel to the guide rail 24, and the auxiliary guide rail 40 is extended overhanging to the side of the rear wall 22d. A pair of auxiliary guide blocks 41 are slidably guided on the auxiliary guide rails 40, and an isolation cover 34 that covers the front side of the grinding wheel 16 when the workpiece is attached and detached is fixed to the auxiliary guide blocks 41. The rear wall 22d of the front cover 22 and the isolation cover 34 are integrally connected by a connecting member 35 so as not to overlap in the Z-axis direction, and the front cover 22 is moved along the guide rail 24 by an actuator 30 (see FIG. 1). When the cover is slid (opened / closed), the isolation cover 34 is moved integrally with the front cover 22.

  That is, when the front cover 22 opens the opening 21 of the fixed cover 20 for attaching and detaching the workpiece, the isolation cover 34 moved together with the front cover 22 is moved to a position covering the front side of the grinding wheel 16, When the front cover 22 closes the opening 21 of the fixed cover 20 for machining the workpiece, the isolation cover 34 is moved to the rear of the headstock 13 and does not obstruct the machining of the workpiece by the grinding wheel 16. It is designed to evacuate.

  At the time of maintenance, the front cover 22 is removed along the auxiliary guide rail 40 provided on the front cover 22 by removing the bolt 36 and releasing the connection between the front cover 22 and the isolation cover 34 by the connecting member 35. 22 can be moved relatively. Thereby, in a state where the opening 21 is opened by the front cover 22, it is possible to open between the workpiece position and the grinding wheel position by the isolation cover 34.

  Thus, in the second embodiment, the isolation cover 34 is moved integrally with the front cover 22 without sliding, and the connection between the front cover 22 and the isolation cover 34 by the connecting member 35 is released. Only in the case, it is guided by the auxiliary guide rail 40 provided on the rear wall 22d of the front cover 22 and is operated to open the front surface position of the grinding wheel 16.

  Therefore, according to the second embodiment, the guide rail 24 that slidably guides the front cover 22 does not need to be longer than the length necessary to open and close the front cover 22, and thus the guide rail The isolation cover 34 can be opened and closed in conjunction with the opening and closing of the front cover 22 with only a slight modification to the existing grinding machine having the front cover 22 slidably guided by 24. .

  In the above-described embodiment, the example in which the isolation cover 34 is retracted to the rear position of the headstock 13 has been described. However, the isolation cover 34 may be configured to be retracted to the rear position of the tailstock 14. it can. In this case, the opening / closing direction of the front cover 22 is opposite to that described in the above embodiment.

  In the above-described embodiment, the example in which the front cover 22 and the isolation cover 34 are detachably connected by the detachable connection member 35 in consideration of maintenance or the like has been described. However, the front cover 22 and the isolation cover 34 are described. It is not always necessary for the present invention to detachably connect the front cover 22 and the isolation cover 34, and the features of the present invention can be obtained even if the front cover 22 and the isolation cover 34 are integrally formed or inseparably connected. There is no loss.

  In the above-described embodiment, the example in which the support block 23 provided with the guide rail 24 and the actuator 30 is fixed to the bed 11 in a gate shape so as to straddle the grinding wheel base 15 is described. It is not always necessary to have a portal shape. For example, when the width of the machine is narrow, a cantilever support block can be used.

  Further, in the above-described embodiment, the example in which the front cover 22 and the isolation cover 34 are integrally connected by the connection member 35 without overlapping in the Z-axis direction has been described. Even if they are connected so as to partially overlap in the Z-axis direction, there is no problem.

  Although the present invention has been described with reference to the embodiments, the present invention is not limited to the configurations described in the embodiments, and does not depart from the gist of the present invention described in the claims. It can take various forms.

  The safety cover device in the grinding machine according to the present invention is suitable for use in a grinding machine provided with a front cover that opens and closes an opening provided in a fixed cover and an isolation cover that covers the front side of the grinding wheel.

DESCRIPTION OF SYMBOLS 13 ... Spindle head, 14 ... Tailstock, 15 ... Grinding wheel stand, 16 ... Grinding wheel, 20 ... Fixed cover, 21 ... Opening part, 22 ... Front cover, 23 ... Support block, 24 ... Guide rail, 30 ... Actuator, 34 ... Isolation cover, 35 ... Connecting member, 36 ... Bolt, 40 ... Auxiliary guide rail.

Claims (5)

In a grinding machine equipped with a front cover that closes the opening provided in the entire cover when machining a workpiece and opens when the workpiece is detached, and an actuator that opens and closes the front cover.
An isolation cover that is arranged between the headstock or tailstock and the wheelhead, covers the front side of the grinding wheel when the workpiece is attached or detached, and is retracted behind the headstock or tailstock when the workpiece is processed Is provided so as to be openable and closable along the opening and closing direction of the front cover, and the isolation cover and the front cover are integrally connected so as to open and close the interlocking cover and the front cover in conjunction with each other. Safety cover device for grinding machines.   2. The isolation cover according to claim 1, further comprising a connecting member that integrally connects the isolation cover and the front cover, wherein the connection member can move the isolation cover relative to the front cover in an opening / closing direction. A safety cover device in a grinding machine, wherein the connection between the front cover and the front cover can be released.   3. The safety cover device according to claim 1, wherein the front cover and the isolation cover are slidably guided on the same guide rail.   4. The guide rail according to claim 3, wherein the guide rail is installed on a support block fixed on a bed, and an actuator that slides the front cover along the guide rail for a predetermined stroke is installed on the support block. A safety cover device for a grinding machine characterized by 3. The grinding according to claim 1, wherein an auxiliary guide rail is provided on the front cover in parallel with the guide rail, and the isolation cover is slidably guided on the auxiliary guide rail. Safety cover device in the panel.

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