JP7705773B2 - machine tools - Google Patents

Description

This application relates to technology related to a workpiece placement table on which a workpiece is placed in a machine tool.

The following Patent Document 1 describes a processing machine line equipped with multiple modules lined up in one direction. The processing machine line of Patent Document 1 is equipped with a workpiece placement table module as one of the multiple modules. The workpiece placement table module has a temporary placement table for workpiece transfer and quality checks, and an unsuitable workpiece table for storing unsuitable workpieces that have been determined to be unsuitable in the inspection process. The workpiece placement table module is also configured to allow workers to remove workpieces.

International Publication No. WO2017/064813

From the viewpoint of shortening the transport time of the workpiece, it is preferable that the workpiece placement table as described above is located closer to the processing device that processes the workpiece. On the other hand, in a machine tool, for example, when the overall length of the device stored inside the device cover becomes long due to differences in structure, etc., it becomes necessary to provide a cover protrusion that protrudes outward from part of the device cover for storage. For this reason, there is a risk that the device will become larger depending on the arrangement of the cover protrusion and the workpiece placement table.

This application was made in consideration of the above-mentioned problems, and aims to provide a machine tool that can reduce the size of the device by optimizing the arrangement of the cover protrusion of the device cover and the workpiece placement table.

In order to solve the above problems, this specification discloses a machine tool that includes a workpiece holding device that holds a workpiece, a processing device that performs processing on the workpiece held by the workpiece holding device, a loader that transfers the workpiece between the workpiece holding device and the workpiece holding device, an equipment cover that houses the workpiece holding device and the processing device, and a workpiece placement table on which the workpiece held by the loader can be placed, in which the equipment cover has a cover protruding portion that protrudes outward from the equipment cover and in which at least a portion of the workpiece holding device is stored, and the workpiece placement table has a slide member that has a placement portion on which the workpiece is placed, a placement table main body that slidably holds the slide member, and a frame member that holds the placement table main body against an installation surface on which the machine tool is installed and holds the placement table main body above the cover protruding portion.

According to the machine tool disclosed herein, the frame member holds the table main body above the cover protrusion protruding from the device cover. This allows the work table to be brought closer to the work holding device, processing device, etc., while avoiding interference between the table main body and the cover protrusion. This shortens the transport time required by the loader to transport the work from the processing device to the work table. In addition, by arranging the devices close to each other, it is possible to reduce the size of the entire device.

FIG. 2 is a front view of the machine tool of the present embodiment. FIG. 2 is a top view of the machine tool of the present embodiment. FIG. 2 is a front view of a portion of the main unit. FIG. 4 is a front view of the mounting portion of the workpiece table. FIG. 4 is a side view of the attachment portion of the workpiece table as viewed from the left. 2 is a perspective view of the workpiece placement table as viewed from above and rearward. FIG. FIG. 2 is a top view of the stand main body and the sliding member. FIG. FIG. FIG. 13 is a diagram showing a workpiece placement table according to another example.

An embodiment of the machine tool of the present application will be described in detail below with reference to the drawings. As shown in Figs. 1 and 2, the machine tool 10 of this embodiment includes a main unit 11, a loader 13, an entrance unit 15, an exit unit 17, and a workpiece placement table (hereinafter referred to as the "placement table") 18. Note that Fig. 2 does not show the loader 13. Figs. 1 and 2 also show some of the devices and equipment (such as the rail base 25 and the frame member 62) installed in each device in a transparent manner. This is also true for Figs. 3 and subsequent figures. In the following description, as shown in Figs. 1 and 2, the direction of the machine width that is horizontal to the installation surface 19 of the device is referred to as the left-right direction, the direction parallel to the installation surface 19 of the device and perpendicular to the left-right direction is referred to as the front-rear direction, and the direction perpendicular to the left-right direction and the front-rear direction is referred to as the up-down direction, based on the direction of the machine tool 10 as seen from the front.

(Overall configuration of machine tool 10)
The machine tool 10 is arranged in the order of the exit device 17, the stand 18, the main body device 11, and the entrance device 15 from the left in the left-right direction. The main body device 11 is arranged in the center of the machine tool 10 in the left-right direction. The main body device 11 has, for example, a device cover 21 having a substantially rectangular parallelepiped shape. A sliding door 22 and an operation unit 23 are provided on the front side of the device cover 21. A machining space for a machining device 55 (see FIG. 3), which will be described later, is provided behind the sliding door 22. A user can access the machining space by opening the sliding door 22, and can check the workpiece W and replace the tool 55B (see FIG. 3). The operation unit 23 is equipped with, for example, a touch panel, a switch, etc., and displays information about the machine tool 10 and accepts operation instructions.

The loader 13 transfers the workpiece W between the entrance device 15, the spindle device 51 of the main body device 11 (see FIG. 3), and the exit device 17. The loader 13 is, for example, a gantry-type workpiece transport device, and moves the movable part 27 in the left-right direction along the rail base 25 provided on the upper part of the main body device 11. For example, the loader 13 slides the movable part 27 by engaging a pinion fixed to the output shaft of a traveling motor (not shown) built into the movable part 27 with the teeth of a traveling rack (not shown) provided on the rail base 25. The loader 13 is also equipped with a lifting device (motor, rack mechanism, etc.) that moves the movable part 27 in the vertical direction, and the movable part 27 can be moved in the vertical direction. The above-mentioned traveling motor, the traveling rack of the rail base 25, the lifting device, etc. are examples of the moving mechanism of the present application. A pair of chuck mechanisms 29 (see FIG. 5) are attached to the lower end of the movable part 27. Each of the pair of chuck mechanisms 29 has claws that clamp the workpiece W and transfers the workpiece W between other devices.

The entrance device 15 is equipped with a transfer device 31 that grips the workpiece W and moves in the left-right direction. The transfer device 31 can receive the workpiece W from, for example, a user or a device in a previous process (not shown) at a receiving position provided behind a door 33. The transfer device 31 moves leftward from the receiving position and transfers the workpiece W to the chuck mechanism 29 of the loader 13 at the transfer position at the left end. A right fence 35 is attached to the transfer position where the workpiece W is transferred from the entrance device 15 to the chuck mechanism 29 of the loader 13. The right fence 35 is an equipment cover that covers the front of the machine tool 10, and is fixed to the right end of the front of the equipment cover 21, covering a part of the entrance device 15. The right fence 35 is provided with a door 37 that allows access to the transfer position, and the transfer state of the workpiece W between the loader 13 and the entrance device 15 can be confirmed.

The exit device 17 is equipped with a receiving device 41 that grips and moves the workpiece W. In the following description of the exit device 17, the same contents as those of the entrance device 15 described above will be omitted as appropriate. The receiving device 41 delivers the workpiece W to a downstream device (not shown) at a delivery position behind the door 43. The receiving device 41 receives the workpiece W from the chuck mechanism 29 of the loader 13 at a delivery position covered by the left fence 45. The left fence 45 is an equipment cover that covers the front of the machine tool 10, and is fixed to the left end of the front of the equipment cover 21, covering a part of the exit device 17. The left fence 45 is provided with a door 47 that allows access to the delivery position.

The left fence 45 is wider in the left-right direction than the right fence 35. Between the door 47 and the main unit 11 in the left-right direction, a stand 18 is arranged. The stand 18 is covered by the left fence 45, which is arranged on the front side, and some of the devices such as a frame member 62 described later, and cannot be seen from the front. Note that the frame member 62 is illustrated transparently in FIG. 1. The stand 18 exposes the front cover 83 (see FIG. 7) of the slide member 63 from an opening 45A provided in the left fence 45, and the slide member 63 can be pulled out downward toward the front side. Details of the stand 18 will be described later. As shown in FIG. 2, a lubrication device 16 that supplies coolant and the like are arranged behind the main unit 11.

(Regarding the main unit 11)
FIG. 3 shows a part of the front of the main body device 11. In addition, FIG. 3 shows the spindle device 51 and the like arranged behind the device cover 21 in a transparent manner. As shown in FIG. 3, the main body device 11 includes the spindle device 51, the tailstock device 53, and the processing device 55. The spindle device 51 is arranged in the processing space with the slide door 22 open, and is a work holding device that holds the work W and rotates the work W around an axis along the left-right direction. The work W in this embodiment is, for example, a cylindrical member that is long in one direction (see FIG. 8), and when held at the processing position of the spindle device 51 (the position shown in FIG. 3), the axial direction is in a state along the axis of the spindle device 51. The work W has an opening on the right side in FIG. 3, for example, and a recess 77 (see FIG. 8) of a predetermined depth is formed in the axial direction from the opening. The spindle device 51 is provided with a recess 51A formed along the longitudinal direction of the work W.

The tailstock device 53 is a device that pushes the workpiece W, which has been brought into the machining space by the loader 13 (see FIG. 1), into the spindle device 51. The tailstock device 53 is inserted into the recess 77 (see FIG. 8) of the workpiece W, and pushes the workpiece W from the right side to the left side, pushing the workpiece W into the recess 51A of the spindle device 51 and positioning the workpiece W at the machining position.

The processing device 55 performs processing on the workpiece W using a tool 55B attached to a tool rest 55A. The position of the tool rest 55A is changed by a drive device (not shown), and the position of the tool 55B relative to the workpiece W is changed. For example, the processing device 55 performs groove cutting processing on the outer peripheral surface of the base end (the tailstock device 53 side) of the workpiece W using the tool 55B.

The spindle unit 51 also has a push-out device 51B on the left side of the device. The push-out device 51B is a device that pushes out the workpiece W from the recess 51A when removing the workpiece W from the spindle unit 51. The push-out device 51B inserts a push member into a recess 78 (see FIG. 8) formed at the tip of the workpiece W, and pushes out the workpiece W to the right (the direction in which it leaves the spindle unit 51). The loader 13 receives the workpiece W pushed out to the right by the push-out device 51B and transports it to the exit device 17 or the stand 18.

A cover protrusion 21A is provided on the left side surface 21B of the device cover 21. The cover protrusion 21A has a box shape that protrudes leftward from the left side surface 21B, i.e., outward in the device width direction. A part of the push-out device 51B is housed in the cover protrusion 21A. Therefore, in this embodiment, a part of the spindle device 51 that holds the workpiece W is housed in the cover protrusion 21A.

Here, when handling a long workpiece W as in this embodiment, the overall length of the device stored in the device cover 21, such as the spindle device 51, may be long. In addition to arranging the extrusion device 51B in the spindle device 51 as in this embodiment, the overall length of the device may be long due to various factors, such as arranging the ports of the inductor that supplies coolant along the axis of the spindle device 51 or arranging the chucks that hold the workpiece W along the axis. In such a case, if an attempt is made to store the entire device with a long overall length in the device cover 21 without providing the cover protrusion 21A, there is a risk that the device cover 21 will become large, that is, the main device 11 will become large. Therefore, by providing the cover protrusion 21A that protrudes only a part of the device with a long overall length, for example, the part that houses the extrusion device 51B, the increase in size of the device cover 21 can be suppressed. And, in the machine tool 10 of this embodiment, the arrangement of the cover protrusion 21A and the stand 18 is optimized to further reduce the overall size of the machine tool 10.

(Regarding the stand 18)
Next, the placement table 18 will be described. As shown in Figs. 4 to 6, the placement table 18 has a placement table main body 61, a frame member 62, and a slide member 63. Fig. 5 and Fig. 7, which will be described later, show both the slide member 63 pushed into the placement table main body 61 to a storage position P1, which is stored therein, and the slide member 63 pulled out to a removal position P2, from which the workpiece W can be removed. The storage position P1 is, for example, a position in which the slide position is held by a first lock member 93, which will be described later, and the opening 45A of the left fence 45 is closed by the front cover 83 of the slide member 63. The removal position P2 is, for example, a position in which the position is held by a second lock member 94, and the opening 45A is closed by the rear cover 75C of the placement section 75.

The stand main body 61 is, for example, a generally rectangular plate-like member that is thin in the vertical direction, has a predetermined width in the horizontal direction, and is long in the front-rear direction. The frame member 62 has, for example, four pillar members 65 and a biasing mechanism 67. Each of the four pillar members 65 is a plate-like metal member that has a predetermined width in the horizontal direction and is long in the vertical direction, and is connected to each other by a horizontal plate 66 (see Figure 4) or the like. The lower ends of the four pillar members 65 are fixed to the installation surface 19 by anchors 69.

Of the four pillar members 65, two pillar members 65 are disposed in front of the cover protrusion 21A, and the remaining two pillar members 65 are disposed behind the cover protrusion 21A. The two pillar members 65 disposed on the front side and the rear side are disposed with a predetermined gap in the left-right direction. In addition, the right pillar member 65 of the two rear side pillar members 65 is fixed to a support (not shown) of the loader 13 by a bracket 64 (see FIGS. 4 and 5). The bracket 64 has, for example, two L-shaped metal members, and fixes the stand 18 to the support of the loader 13 by fixing the pillar members 65 and the L-shaped metal members fixed to the support to each other. The stand main body 61 is fixed to the upper ends of the four pillar members 65 and is disposed above the cover protrusion 21A. The table main body 61 is held by the pillar members 65 in a state inclined downward from the rear (the back surface of the machine tool 10) to the front, and is inclined in an inclination direction 71 (see FIG. 5). Therefore, the frame member 62 holds the table main body 61 against the installation surface 19 of the machine tool 10, and holds the table main body 61 above the cover protrusion 21A. A work sensor 59 that detects the entry and exit of the workpiece W into and from the table 18 is provided on the side of the table main body 61 (see FIG. 4). In the following description, the upper side (left side in FIG. 5) in the inclination direction 71 is referred to as the base end side, and the lower side (right side in FIG. 5) is referred to as the tip end side.

As shown in FIG. 6, a slide mechanism 73 that slidably holds the slide member 63 is provided on the upper surface of the table main body 61. The slide mechanism 73 is, for example, a sliding device that uses bearings, and has a rail 73A and a table 73B that can slide relative to the rail 73A, and causes the table 73B to slide in the tilt direction 71 by a bearing (such as a ball bearing) provided on the table 73B.

6 and 7, the table 73B is attached to the underside of the rear end of the slide member 63, and is arranged on the base end side of the table main body 61 when the slide member 63 is arranged at the storage position P1. In addition, two rotating members 70 are provided on the tip side of the table main body 61. The two rotating members 70 are provided at both ends of the table main body 61 in the left-right direction, and are rotatable with the slide member 63 placed on top. The slide member 63 is supported at the base end side by the table 73B and at the tip end side by the rotating member 70, and slides in the inclined direction 71. As a result, the slide member 63 can be drawn out from the table main body 61 to the tip side of the inclined direction 71. The table main body 61 is arranged above the cover protrusion 21A, and the left side surface 21B of the device cover 21 and the table 18 are arranged in close proximity to each other, and the removal position P2 where the slide member 63 (workpiece W) is drawn out can be lower than the storage position P1. That is, the height of the workpiece W from the installation surface 19 at the removal position P2 can be lowered. This allows the position of the table 18 to be closer to the left side surface 21B, thereby miniaturizing the machine tool 10, while improving the convenience of the user in loading and unloading the workpiece W. The table main body 61 and the slide member 63 may not be inclined. For example, the frame member 62 may hold the table main body 61 and the slide member 63 above the cover protrusion 21A in a horizontal state relative to the installation surface 19.

As shown in FIG. 5, a cutout 21C is formed in the upper part of the cover protrusion 21A to match the position and shape of the stand main body 61 and the slide member 63 inclined in the inclination direction 71. The stand main body 61 is, for example, at approximately the center of the cover protrusion 21A in the front-to-rear direction, approximately at the same height as the upper surface of the cover protrusion 21A, and is in contact with or slightly separated from the cover protrusion 21A. The cutout 21C is an inclined surface formed from the center to the front end of the cover protrusion 21A in the front-to-rear direction. The cutout 21C is inclined downward at an angle greater than the inclination angle of the stand main body 61, and the distance between the stand main body 61 in the up-down direction increases as it moves forward from the center of the cover protrusion 21A in the front-to-rear direction. In other words, the frame member 62 holds the stand main body 61 away from the top surface of the cover protrusion 21A and the cutout portion 21C, except for the center portion of the cover protrusion 21A in the front-rear direction. In this configuration, when the stand 18 is placed after the main device 11 is placed, the stand main body 61 can be attached while suppressing interference between the stand main body 61 and the cover protrusion 21A when the stand main body 61 is placed and fixed on the installed frame member 62 after the frame member 62 is installed. The same applies to the removal of the stand main body 61. This reduces the workload of the removal and installation of the stand 18.

6 and 7, the slide member 63 is provided with a mounting portion 75 on which the workpiece W can be placed. The mounting portion 75 is attached to the upper surface of the base end side (left side in FIG. 5) of the slide member 63 in the inclination direction 71. FIG. 8 shows the mounting portion 75 with the workpiece W placed thereon, positioned at the position of a plate 81 described later, viewed from the front. As shown in FIG. 8, the mounting portion 75 has a bottom plate 75A and three support members 75B. The bottom plate 75A is a plate-shaped metal member and is fixed to the upper surface of the slide member 63. Three support members 75B are arranged side by side in the left-right direction on the upper surface of the bottom plate 75A. The support member 75B is fixed, for example, by connecting multiple metal members, and a groove (not shown) that matches the outer peripheral shape of the workpiece W is formed at the upper end. The three support members 75B support the workpiece W inserted from above into this groove from below. The machine tool 10 is capable of machining workpieces W having different axial lengths, for example. Depending on the axial length of the workpiece W, the machine tool 10 may use, for example, only two of the three support members 75B (the two on the right side in FIG. 8) or may use all three support members 75B. Note that FIG. 7 does not show the bottom plate 75A and support members 75B at the removal position P2.

As shown in Figs. 5 and 8, the bottom plate 75A of the mounting portion 75 is fixed in a horizontal state to the slide member 63 inclined in the inclination direction 71. The mounting portion 75 holds the workpiece W supported by the support member 75B in a horizontal state (parallel to the front-rear and left-right directions) before and after the slide member 63 is slid in the inclination direction 71. The workpiece W supported by the support member 75B is held, for example, with its axial direction aligned with the left-right direction and slides. This makes it possible to prevent the workpiece W from falling off or rolling when the slide member 63 is pulled out, even if the slide member 63 is inclined. The mounting portion 75 may hold the workpiece W in an inclined state in the inclination direction 71 or the axial direction of the workpiece W.

As shown in FIG. 6, the table main body 61 is provided with a photoelectric sensor 79 and a proximity sensor 80. The photoelectric sensor 79 is configured to place the workpiece W on the placement section 75 between the optical axis connecting the light-emitting section and the light-receiving section. Therefore, the machine tool 10 can detect the presence or absence of the workpiece W on the placement section 75 based on the detection signal of the photoelectric sensor 79. The proximity sensor 80 is, for example, an induction-type proximity sensor, and is arranged at a position a predetermined distance away from the tip of the workpiece W in the axial direction of the workpiece W placed on the placement section 75. The proximity sensor 80 outputs different detection signals due to the distance from the tip of the workpiece W changing when a long workpiece W using three support members 75B is placed on the placement section 75 and when a short workpiece W using two support members 75B is placed on the placement section 75. As a result, the machine tool 10 can determine the type of workpiece W placed on the placement section 75 based on the detection signal of the proximity sensor 80.

The placement section 75 also has a rear cover 75C behind the support member 75B. The rear cover 75C is, for example, a rectangular plate that is long in the left-right direction and has a shape that matches the opening 45A (see FIG. 1) of the left fence 45. The rear cover 75C slides together with the slide member 63 and closes the opening 45A of the left fence 45 at the removal position P2. A front cover 83 is provided at the tip of the slide member 63 in the inclination direction 71. The front cover 83, like the rear cover 75C, has a shape that matches the opening 45A of the left fence 45. The front cover 83 slides together with the slide member 63 and closes the opening 45A at the storage position P1.

A handle 85 is attached to the front of the front cover 83. The user can pull out the slide member 63 by grasping the handle 85 and pulling it in the inclination direction 71. A regulating member 83A (see FIG. 5) is provided behind the front cover 83. The regulating member 83A has a U-shaped frame shape with an opening on the lower side when the front cover 83 is viewed from the front, and is formed from the rear surface of the front cover 83 to a position close to the placement part 75 in the inclination direction 71. In the pull-out operation of the slide member 63, the opening 45A is closed by the regulating member 83A in the middle of being pulled out until the placement part 75 is pulled out to the outside of the opening 45A (see FIG. 1). This makes it possible to prevent the user from accidentally putting his/her hand into the opening 45A in the middle of pulling out the work W (placement part 75) to the outside of the opening 45A.

The table main body 61 is also provided with an electromagnetic lock 87 (see FIG. 4) and a latch 89 (see FIG. 6). For example, in the initial state when the machine tool 10 is powered on, the electromagnetic lock 87 engages with the slide member 63 to close the slide member 63, and is unlocked under the control of the control unit of the machine tool 10. The user can unlock the electromagnetic lock 87 by operating the operation unit 23. The latch 89 is attached to the front cover 83 so as to be slidable in the left-right direction, and moves between a closed position where it engages with the table main body 61 to restrict the sliding movement of the slide member 63, and an open position where it does not restrict it.

For example, when the quality check button on the operation unit 23 is touched, the machine tool 10 controls the loader 13 to move the workpiece W placed on the spindle device 51 to the placement section 75 of the placement table 18. When the work of placing the workpiece W on the placement section 75 is completed, the machine tool 10 unlocks the electromagnetic lock 87 and displays a message on the operation unit 23 indicating that placement is complete. The user can check the workpiece W on the placement section 75, i.e., the processing quality of the workpiece W after processing, by unlocking the latch 89 and pulling out the slide member 63. In this embodiment, by arranging the placement table 18 above the cover protrusion 21A, there is a risk that the removal position of the workpiece W will be high. In response to this, as described above, the placement table 18 is tilted in the tilt direction 71 to make it easier to remove the workpiece W from the pulled-out slide member 63.

As shown in FIG. 8, the plate 81 has a recess 81A formed to match the shape of the protrusion 91 of the workpiece W. The plate 81 is attached to the upper front end (tip) side of the table main body 61, and is attached at a position where the workpiece W that slides on the slide member 63 passes through. As a result, for example, when a user pulls out the slide member 63 to perform a quality check, and then places the workpiece W on the placement section 75 with the axial direction reversed and the slide member 63 is pushed in, the workpiece W and the plate 81 come into contact. The user can be informed that the orientation of the workpiece W placed on the placement section 75 is incorrect. This can prevent the loader 13 from chucking the workpiece W or chucking it in the wrong direction. The placement table 18 does not need to be equipped with the electromagnetic lock 87, the latch 89, and the plate 81.

6 and 7, a first locking member 93 and a second locking member 94 are attached to the table main body 61 and the slide member 63. For example, a ball catch, a roller catch, a rotary catch, or the like can be used as the first and second locking members 93 and 94. The first locking member 93 has, for example, two female parts at the rear end of the table main body 61, and when the slide member 63 is placed in the storage position P1, the male part provided on the slide member 63 is inserted into the female part of the table main body 61 to hold the slide member 63 in the storage position P1. In this state, the front cover 83 closes the opening 45A. As a result, even if the electromagnetic lock 87 or the latch 89 is released due to a malfunction or vibration, etc., and a force is applied in the tilt direction 71 due to the weight of the workpiece W, etc., the first locking member 93 can hold the slide member 63 in the storage position P1. In other words, the tilted configuration of the placement table 18 makes it easy to remove the workpiece W, while preventing the slide member 63 from being pulled out due to a malfunction of the electromagnetic lock 87, etc.

In addition, the second locking member 94 has, for example, two female parts at the front end of the table main body 61, and when the slide member 63 is placed at the removal position P2, the male parts of the slide member 63 are inserted into the female parts of the table main body 61 to hold the slide member 63 at the removal position P2. In addition, a stopper 95 is provided at the front end of the table main body 61 and in the center in the left-right direction. The stopper 95 is provided in front of the two female parts of the second locking member 94 and is provided at a position between the two female parts in the left-right direction. As shown in Figures 6 and 7, the table 73B of the slide mechanism 73 slides together with the slide member 63. When the slide member 63 is slid to the position P2, the table 73B abuts against the stopper 95 and is restricted from moving forward. As a result, even when the workpiece W is placed on the placement portion 75 and the weight of the workpiece W is applied to the slide member 63, the second locking member 94 and the stopper 95 can stably hold the slide member 63 at position P2. In this state, the rear cover 75C closes the opening 45A. As will be described later, the slide member 63 of this embodiment is biased toward the base end by the biasing mechanism 67. For this reason, the second locking member 94 can prevent the slide member 63 arranged at the removal position P2 from being moved toward the base end by the biasing mechanism 67, i.e., the slide member 63 from closing by itself.

An oil pan 97 is provided on the upper surface of the slide member 63 to collect the coolant that has fallen from the workpiece W. The oil pan 97 is provided, for example, on the front of the upper surface of the slide member 63 and slides together with the slide member 63 to cause the coolant that has fallen from the workpiece W placed on the placement section 75 to flow downward in the inclination direction 71. The slide member 63 is also provided with two valves 99 (see FIG. 7) that discharge the coolant collected by the oil pan 97. Each of the two valves 99 is attached to the lower end of the slide member 63 in the inclination direction 71 and is provided at both left and right ends of the end. Each of the two valves 99 can be switched between open and closed states, for example, by turning a cock.

For example, when air or the like is blown onto the workpiece W transported from the spindle device 51, the coolant may adhere to the workpiece W. Therefore, when the workpiece W is placed on the placement section 75, there is a risk that the coolant adhering to the workpiece W may fall. In the placement table 18 of this embodiment, the slide member 63 or the like is tilted to allow the coolant that falls from the workpiece W to flow in the inclined direction 71 by the oil pan 97, and the coolant can be collected downstream. Furthermore, by providing a valve 99 at the lower end of the inclined direction 71, the user can easily collect the coolant that has accumulated at the lower end of the inclined direction 71 from the valve 99.

Next, the biasing mechanism 67 will be described. The biasing mechanism 67 biases the slide member 63 toward the table main body 61, which is the upper side in the inclination direction 71. In detail, FIG. 9 is a rear view of the biasing mechanism 67, showing the biasing mechanism 67 as seen from behind. As shown in FIGS. 5, 6, and 9, the biasing mechanism 67 has a wire 101, a guide roller 103, and a weight 105.

The tip of the wire 101 is connected to the base end (rear end) of the slide member 63 (see Figures 5 and 6). The guide roller 103 is rotatably supported by a support member 107 provided at the rear end of the table main body 61. The wire 101 is wound around the guide roller 103. The guide roller 103 rotates, for example, around a rotation axis along the left-right direction, and rotates in conjunction with the movement of the wire 101.

The weight 105 is disposed at the base end of the wire 101 on the opposite side to the slide member 63 with the guide roller 103 in between. The biasing mechanism 67 has, for example, a bracket 109 that houses the two weights 105. The bracket 109 has, for example, a box shape that can house the two weights 105, and the base end of the wire 101 is fixed to the bracket 109. The biasing mechanism 67 also has a slide mechanism 111 that slides the bracket 109. The slide mechanism 111 is, for example, a slide device that uses bearings, and is connected to the rail 111.
The table 111B is slidably moved along the rail 111A by a bearing (such as a ball bearing) provided on the table 111B.

The rail 111A is disposed, for example, between two pillar members 65 provided behind the cover protrusion 21A, and is fixed to the pillar members 65 in a vertical state. The table 111B moves in the vertical direction along the rail 111A. The bracket 109 is fixed to the table 111B. The guide roller 103 is disposed above the rail 111A. In the vertical direction, the wire 101 drawn from the guide roller 103 toward the bracket 109 is stretched between the bracket 109 in the vertical direction. Note that FIG. 9 illustrates the bracket 109 and table 111B disposed at two different positions in the vertical direction on one drawing, so that the sliding movement of the bracket 109 can be easily understood.

5 and 9 show the positions of the weight 105 and the bracket 109 when the slide member 63 is placed in the storage position P1. When the slide member 63 is placed in the storage position P1, the bracket 109 is placed at a position that is the lower end of the rail 111A. When the slide member 63 is pulled out from this state, the bracket 109 is pulled upward by the wire 101 as the slide member 63 moves in the inclination direction 71. In addition, the biasing mechanism 67 always applies an external force to the slide member 63 to return it to the base end side (the table main body 61). This makes it possible to prevent the slide member 63 from moving downward in the inclination direction 71 due to a malfunction of the electromagnetic lock 87, vibration, the weight of the work W, etc., by the biasing mechanism 67. In addition, even when a heavy work W is placed on the inclined slide member 63, the biasing mechanism 67 applies an external force to return it from the removal position P2 to the storage position P1, so that the user can return the pulled-out slide member 63 to the table main body 61 with a relatively small force.

The biasing mechanism 67 of this embodiment applies an external force to the slide member 63 by connecting a weight 105 to the base end of the wire 101 wound around the guide roller 103 and connecting the slide member 63 to the tip end. In this configuration, the force of gravity acting on the weight 105 can be used to pull the slide member 63 back. The magnitude of the force pulling the slide member 63 back can be adjusted by changing the number of weights 105, etc.

The loader 13 of this embodiment also has a moving mechanism such as a rail base 25 that slides the chuck mechanism 29 in the device width direction (left and right direction). The cover protrusion 21A protrudes in the left and right direction from the left side surface 21B of the device cover 21. The stand 18 holds the stand main body 61 above the cover protrusion 21A by the frame member 62 so as to straddle the protruding cover protrusion 21A. In this configuration, as shown in FIG. 4, the stand 18 and the cover protrusion 21A can be arranged so as to overlap in the vertical direction, and the stand 18 and the left side surface 21B (main body device 11) can be brought closer in the left and right direction. If the stand 18 is arranged to the left of the cover protrusion 21A, it becomes necessary to move the transfer position between the exit device 17 (see FIG. 1) and the loader 13 further to the left. As a result, the distance L1 (see FIG. 4) by which the rail base 25 protrudes to the left from the left side surface 21B becomes longer. In contrast, in this embodiment, the table body 61 of the table 18 is disposed above the cover protrusion 21A, and the table 18 is brought closer to the main body device 11, thereby shortening the distance L1. This, in turn, shortens the stroke of the loader 13, thereby shortening the length of the production line for the workpieces W.

In addition, the workpiece W in this embodiment has a generally cylindrical shape that is long in one direction, as shown in FIG. 8. As shown in FIG. 3, the spindle device 51 has a recess 51A formed along the longitudinal direction of the workpiece W, and rotates the workpiece W stored in the recess 51A. In addition, the main unit 11 is provided with a push-out device 51B that pushes out the workpiece W stored in the recess 51A of the spindle device 51. In the machine tool 10 that performs machining on such a long workpiece W, the push-out device 51B or the like is required when removing the workpiece W stored in the spindle device 51. By attaching the push-out device 51B, the total length of the spindle device 51 becomes long, and it becomes necessary to provide a cover protrusion 21A and store at least a part of the push-out device 51B in the cover protrusion 21A. Therefore, in the machine tool 10 that performs machining on the long workpiece W, by adopting a configuration in which the placement table main unit 61 is arranged above the cover protrusion 21A, it is possible to reduce the size of the entire machine tool 10 while ensuring the arrangement space for the push-out device 51B.

The spindle device 51 is an example of a workpiece holding device. The left-right direction is an example of the device width direction. The rail base 25 is an example of a movement mechanism.

As described above, the present embodiment has the following advantages.
The device cover 21 of the machine tool 10 according to one embodiment of the present application has a cover protruding portion 21A that protrudes leftward from the left side surface 21B and accommodates the push-out device 51B. The frame member 62 of the table 18 holds the table main body portion 61 against the installation surface 19, and holds the table main body portion 61 above the cover protruding portion 21A. In this configuration, the table main body portion 61 on which the workpiece W is placed can be disposed above the cover protruding portion 21A, and the distance between the table 18 and the left side surface 21B can be shortened. The table 18 can be brought closer to the spindle device 51, the processing device 55, and the like while avoiding interference between the table main body portion 61 and the cover protruding portion 21A. This allows the loader 13 to shorten the transport time required to transport the workpiece W from the processing device 55 to the table 18. In addition, by arranging the devices close to each other, the entire device can be made smaller.

Furthermore, the present application is not limited to the above-described embodiments, but can be embodied in various forms with various modifications and improvements based on the knowledge of those skilled in the art.
For example, the device stored in the cover protruding portion 21A is not limited to the extrusion device 51B, but may be an inducer provided in the spindle device 51, a port for the inducer, a claw for clamping the workpiece W, or a member combining these. Also, the extrusion device 51B may be stored in its entirety or only in part within the cover protruding portion 21A.
In the above embodiment, the spindle device 51 is provided with the recess 51A for accommodating the workpiece W, but this is not essential.
In addition, the workpiece holding device of the present application may be configured to chuck the workpiece W using only the child jaws without using the recess 51A, or may be a collet chuck that does not use the child jaws.

In the above embodiment, the stand 18 is configured to incline downward from the rear to the front, but the inclination direction is not limited to this direction. For example, as shown in FIG. 10, the stand 131 may be configured to incline left and right (apparatus width direction). The inclination direction 71 of the stand 131 shown in FIG. 10 is, for example, from the upper right to the lower left. Even with this configuration, the base end (right end) of the stand main body 61 and the left side surface 21B can be brought closer to each other, and the machine tool 10 can be made smaller. Alternatively, the stand main body 61 and the slide member 63 may be configured to incline upward (for example, from the lower left to the upper right in FIG. 5) as they move from the base end side to the tip end side of the inclination direction 71. That is, the slide member 63 may be configured to be pulled out upward.

Moreover, the stand 18 does not need to include the biasing mechanism 67 .
The configuration of the biasing mechanism 67 in the above embodiment is an example. For example, the weight 105 may be fixed directly to the base end of the wire 101 without using the bracket 109. Moreover, the biasing mechanism 67 may not include the slide mechanism 111. Moreover, a spring that biases the slide member 63 by elastic force may be used as the biasing mechanism.
The stand 18 does not necessarily have to include at least one of the first and second locking members 93 and 94 .
The cover protrusion 21A does not need to include the notch 21C.
The position where the valve 99 is provided is not limited to the lower end of the slide member 63, but may be another position such as near the mounting portion 75. Furthermore, the valve 99 and the oil pan 97 may be provided in the mounting table main body 61.
The shape of the workpiece W shown in FIG. 8 is just an example, and the shape of the workpiece in the present application may be other shapes, such as a thin annular shape.
A lathe equipped with a spindle unit 51 is used as the machine tool equipped with the stage of the present disclosure. However, the type of machine tool equipped with the stage is not particularly limited. The machine tool of the present disclosure may be a milling machine, a drilling machine, a milling cell, a turning center, a machining center, or the like.

LIST OF SYMBOLS 10 Machine tool, 13 Loader, 18 Workpiece placement table, 19 Installation surface, 21 Equipment cover, 21A Cover protrusion, 21C Cutout portion, 25 Rail base (moving mechanism), 29 Chuck mechanism, 51 Spindle device (workpiece holding device), 55 Machining device, 61 Placement table main body, 62 Frame member, 63 Slide member, 67 Urging mechanism, 71 Tilt direction, 75 Placement portion, 93 First locking member, 94 Second locking member, 97 Oil pan, 99 Valve, 101 Wire, 103 Guide roller, 105 Weight, W Workpiece, P1 Storage position, P2 Removal position.

Claims (9)

A workpiece holding device for holding a workpiece;
a processing device that performs processing on the workpiece held by the workpiece holding device;
A loader that transfers the workpiece between the workpiece holding device and the loader;
an apparatus cover in which the work holding device and the processing device are housed;
a workpiece placement table on which the workpiece held by the loader can be placed;
A machine tool comprising:
The device cover includes:
A cover protrusion protruding outward from the device cover and housing at least a part of the work holding device,
The workpiece stand is
A slide member having a placement portion on which the workpiece is placed;
a stand main body portion that slidably holds the slide member;
a frame member that holds the table main body portion against an installation surface on which the machine tool is installed and that holds the table main body portion above the cover protrusion;
A machine tool having the above structure. The loader includes:
A chuck mechanism for gripping the workpiece;
a moving mechanism that slides and moves the chuck mechanism in a device width direction of the machine tool;
having
The cover protrusion is
The machine tool according to claim 1 , wherein the machine cover protrudes outward in the machine width direction. The stand main body portion is
held by the frame member in an inclined state,
The slide member is
The stand body is held by the stand body so as to be able to be pulled out downward in a tilt direction of the stand body,
The frame member includes:
3. The machine tool according to claim 1, further comprising a biasing mechanism that biases the slide member toward the table main body, which is an upper side in the inclination direction. The biasing mechanism includes:
A wire having a tip connected to the slide member;
a guide roller that is rotatably held relative to the placement table main body and around which the wire is wound;
a weight connected to a base end of the wire on the opposite side to the slide member with the guide roller therebetween;
The machine tool according to claim 3 , further comprising: The mounting portion of the slide member is
5. The machine tool according to claim 3, wherein the workpiece is held in a horizontal state before and after the slide member is slid in the inclined direction. The stand main body portion is
a first locking member that holds the slide member, which has been pushed into the stand main body to a storage position, at the storage position;
a second locking member that holds the slide member, which has been pulled out to a removal position where the workpiece can be removed, at the removal position;
The machine tool according to any one of claims 3 to 5, further comprising: The cover protrusion is
7. The machine tool according to claim 3, further comprising a notch in an upper portion thereof that is cut out to match the position of the table main body inclined in the inclination direction. The slide member is
an oil pan provided below the placement portion to allow coolant that has fallen from the workpiece placed on the placement portion to flow downward in the inclination direction;
a valve for discharging the coolant;
having
The valve is
The machine tool according to claim 3 , wherein the slide member is attached to a lower end portion of the slide member in the inclination direction. The workpiece is
It has a long shape in one direction,
The workpiece holding device is
a spindle device having a recess formed along a longitudinal direction of the workpiece and configured to rotate the workpiece accommodated in the recess;
a push-out device that pushes out the workpiece accommodated in the recess of the spindle device from the recess;
having
The cover protrusion is
The machine tool according to claim 1 , wherein at least a part of the pushing device is housed.

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