Machine Tools

Abstract

The present invention provides a machine tool that suppresses dirtiness of a step and improves operability during replacement. The machine body 10 of the machine tool (1) includes: a splash plate 20 that surrounds a processing area 21; and a door 25 that can open and close an opening 22 of the splash plate 20. The step 50 of the machine tool (1) is mounted on the machine body 10 in a changeable configuration. The step 50 is arranged on the outside O1 of the machine body 10 in a state of being mounted on the machine body 10 when the door 25 is closed, and when the door 25 is opened, it can be changed to a front operation configuration 52 that allows access to the processing area 21 from the outside O1 of the machine body 10 through the opening 22 while maintaining the state of being mounted on the machine body 10.

Description

Technical Field

[0001] The invention relates to a machine tool with a treadle for front operation. Background Art

[0002] In a large lathe, etc., an operator may enter a processing area to disassemble or assemble parts or discharge chips during pre-operation. In order to perform the above operations, a stepping platform for the operator to stand on may be provided in the processing area near the opening of the splash guard. Patent document 1 discloses a machine tool having a stepping platform that can be changed into a processing mode and a pre-operation mode. The stepping platform is provided in the processing area inside the opening of the splash guard and near the opening when it is in the processing mode and the pre-operation mode.

[0003] [Prior art literature]

[0004] [Patent Document]

[0005] [Patent Document 1] Japanese Patent Application Publication No. 2015-13335 Summary of the invention

[0006] [Problems that the invention aims to solve]

[0007] If the step is also in the processing area during processing, the step is exposed to cutting oil or chips. Therefore, if the operator stands on the step without cleaning it during the pre-operation, there is a possibility that the cutting oil or chips adhere to the shoes and dirt adheres to the surrounding of the machine body. In order to keep the factory clean, etc., the step needs to be cleaned.

[0008] On the other hand, it is cumbersome to perform the following operations: during the preliminary operation, the operator places the step into the processing area from the outside of the machine body, and during the processing, the operator moves it away from the machine body.

[0009] The present invention discloses a machine tool capable of preventing a step from getting dirty and improving the workability during front operation.

[0010] [Technical means to solve the problem]

[0011] The machine tool of the present invention has the following form, namely, it comprises: a machine body including a splash plate surrounding a processing area, and a door capable of opening and closing an opening of the splash plate; and

[0012] A stepping platform is mounted on the machine body in a changeable configuration; and

[0013] The step is arranged outside the machine body in a state of being mounted on the machine body when the door is closed, and can be changed to a configuration for pre-work for entering the processing area from the outside of the machine body through the opening while remaining mounted on the machine body when the door is opened.

[0014] [Effects of the Invention]

[0015] According to the present invention, it is possible to provide a machine tool that suppresses contamination of a step and improves workability during front work. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a perspective view schematically showing an example of a machine tool.

[0017] Figure 2A is a front view schematically showing an example of a machine tool during processing. Figure 2B This is a front view schematically showing an example of a machine tool during a pre-operation.

[0018] Figure 3 This is a diagram schematically illustrating the main parts of the machine tool in a case where the step is arranged for storage.

[0019] Figure 4 This is a diagram schematically illustrating the main parts of a machine tool in which a step platform is arranged for front working.

[0020] Figure 5 It is a perspective view schematically showing an example of a step platform arranged for storage.

[0021] Figure 6 It is a diagram schematically showing a variation example of the tread platform.

[0022] Figure 7 It is a diagram schematically showing a variation example of the tread platform.

[0023] Figure 8 It is a diagram schematically showing an example of a positioning structure of a step platform. DETAILED DESCRIPTION

[0024] Of course, the following embodiments are merely illustrative of the present invention, and all of the features shown in the embodiments are not necessarily essential to the solution means of the invention.

[0025] (1) Overview of the technology included in the present invention:

[0026] First, refer to Figures 1 to 8The examples shown illustrate the outline of the technology included in the present invention. In addition, the figures of the present application are schematic diagrams of examples, and the magnifications of the directions shown in the figures are different, and the figures are not integrated. Of course, the elements of the present invention are not limited to the specific examples shown by the symbols.

[0027] [Form 1]

[0028] A machine tool (e.g., a lathe 1) of one embodiment of the present invention includes a machine body 10 and a step 50. The machine body 10 includes: a splash plate 20 surrounding a processing area 21; and a door 25 that can open and close an opening 22 of the splash plate 20. The step 50 is mounted on the machine body 10 in a changeable configuration. The step 50 is arranged outside O1 of the machine body 10 in a state of being mounted on the machine body 10 when the door 25 is closed, and can be changed to a front operation configuration 52 for entering the processing area 21 from the outside O1 of the machine body 10 through the opening 22 when the door 25 is opened while remaining mounted on the machine body 10.

[0029] Since the step 50 mounted on the machine body 10 is arranged outside O1 of the machine body 10 when machining is performed with the door 25 closed, the adhesion of cutting oil or chips is suppressed and good safety is maintained. When the door 25 is opened and the front operation is performed, the arrangement of the step 50 can be changed to a front operation arrangement 52 that enters the machining area 21 from the outside O1 of the machine body 10 through the opening 22 while the step 50 is still mounted on the machine body 10. Therefore, the operator P can easily change the step 50 from the state of waiting outside the machine body to the front operation arrangement 52. Therefore, this form can provide a machine tool that suppresses the step from being contaminated and improves the operability during the front operation. In addition, since the step 50 of the front operation arrangement 52 crosses the opening 22, the closing action of the door 25 is hindered and the door interlocking function is effective, thereby maintaining the safety of the operator during the front operation.

[0030] [Form 2]

[0031] like Figure 4 As exemplified in the examples of FIG. 1 and FIG. 2 , the step 50 may also have a step surface 61 on which the operator P can stand in the front operation configuration 52, and the direction of the step surface 61 changes when the storage configuration 51 when the door 25 is closed is changed to the front operation configuration 52. Thus, the operator P can stand on the step surface 61 of the step 50 during the front operation. In addition, since the direction of the step surface 61 when the step is stored is different from that during the front operation, this form can improve the storage performance of the step.

[0032] Here, the mechanism for changing the direction of the pedal surface includes a mechanism for rotating the pedal having the pedal surface, and a mechanism for sliding and rotating the pedal (see Figure 6 ), a mechanism for guiding the pedal along the curved guide (not shown), etc. The above-mentioned remarks can also be applied to the following forms. In addition, although not included in the above-mentioned form 2, as Figure 7 As exemplified above, even when the direction of the step surface does not change from the storage arrangement to the front operation arrangement, this is also included in the present invention.

[0033] [Form 3]

[0034] like Figure 2A As exemplified in the above, the step 50 can change the horizontal position (e.g., horizontal position P1, P2) in the state where the door 25 is set to the storage arrangement 51 when the door 25 is closed. In this case, the operator P can change the horizontal position of the step 50 of the storage arrangement 51 when performing processing with the door 25 closed. Therefore, in this form, the step of the storage arrangement can be located at a horizontal position that does not become an obstacle during processing.

[0035] Here, the horizontal position of the step refers to the position of the horizontal component of the step. Therefore, the step configured for storage can move in the horizontal direction, and can move in a direction deviating upward or downward from the horizontal direction as long as the movement includes a horizontal component. The above-mentioned remarks can also be applied to the following forms.

[0036] Although not included in the third aspect, even if the horizontal position of the step for storage does not change, it is also included in the present invention.

[0037] [Form 4]

[0038] like Figure 2B As exemplified in the above, the step 50 can change its horizontal position (e.g., horizontal position P2, P3) in the state where it is set to the pre-work configuration 52. In the above case, the operator P can change the horizontal position of the step 50 entering the processing area 21 from the outside O1 of the machine body 10 through the opening 22 with the door 25 open. For example, it is assumed that the machine tool (1) is a lathe having a first spindle and a second spindle facing each other. In the above case, by setting the step 50 with the pre-work configuration 52 at a horizontal position close to the first spindle, pre-work around the first spindle can be performed, and by setting the step 50 with the pre-work configuration 52 at a horizontal position close to the second spindle, pre-work around the second spindle can be performed. Therefore, this form can further improve the operability during pre-work.

[0039] Although not included in the fourth aspect, even if the horizontal position of the step arranged for front work does not change, it is also included in the present invention.

[0040] [Form 5]

[0041] like Figure 4 , 5 As exemplified in the examples of FIG. 1 and FIG. 2 , the step platform 50 may include: a pedal 60 mounted on the machine body 10 in a changeable configuration; a foot portion 70 supporting the pedal 60 so that the operator P can stand on it when the front working arrangement 52 is used; and a tilting mechanism 75 for tilting the foot portion 70 relative to the pedal 60. The tilting mechanism 75 can tilt the foot portion 70 to a use state 71 supporting the pedal 60 and a non-use state 72 along the pedal 60. The machine body 10 may include a mounting portion (for example, a rear tilting portion 18) for mounting the front end 70a of the foot portion 70 when the step platform 50 is set to the front working arrangement 52 and the foot portion 70 is set to the use state 71. Thus, when the front working is performed, the pedal 60 is supported by the foot portion 70 mounted on the mounting portion of the machine body 10 in the use state 71, and the durability of the step platform 50 can be improved. Furthermore, since the foot portion 70 can be inclined along the pedal 60 so as not to be an obstacle when the step platform is stored, this embodiment can improve the storage performance of the step platform.

[0042] Of course, the step platform including the pedal, the foot portion, and the tilting mechanism is only an example of the present invention.

[0043] [Form 6]

[0044] like Figure 1 As exemplified in the above, the machine body 10 may include a retreat portion 16 that is recessed inwardly at the lower portion of the outer surface 15 where the door 25 is located. The step 50 may be stored in the retreat portion 16 in the storage arrangement 51 when the door 25 is closed. Since the step 50 disposed at the outside O1 of the machine body 10 in this form is stored in the retreat portion 16 at the lower portion of the machine body 10, a dedicated space for storing the step is not required.

[0045] Although not included in the sixth aspect, even if the machine body does not have a retractable portion, it is also included in the present invention.

[0046] (2) Specific examples of machine tools:

[0047] Figure 1 The structure of a fixed spindle type NC (numerical control) lathe 1 is schematically illustrated as an example of a machine tool. Since the lathe 1 is large, it is provided with a work step 50 for the operator P to enter the machining area 21 during the front operation. Figure 2A The front side of the lathe 1 during machining is schematically illustrated. Figure 2B The front side of the lathe 1 during the front operation is schematically illustrated. Figure 3The main part of the lathe 1 is schematically illustrated in the case where the step 50 is a storage arrangement 51 . Figure 4 The main part of the lathe 1 is schematically illustrated in the case where the step 50 is a front working arrangement 52 . Figure 5 The appearance of the step 50 of the storage configuration 51 is schematically illustrated. In addition, the drawings referred to in this specification are merely examples for explaining the present invention, and do not limit the present invention. In addition, the description of the positional relationship of each part is only for illustration. Therefore, even if the left and right are reversed, the rotation direction is reversed, etc., it is also included in the present invention. In addition, the sameness of direction or position is not limited to strict consistency, and also includes the situation where it deviates from strict consistency due to errors.

[0048] Figure 1 , 2B The lathe 1 shown in the figure comprises: a machine body 10 having spindles 41, 42, tool rests 43, 44, an operating unit 45, and an NC device (not shown), and a step 50 mounted on the machine body 10 so that the configuration can be changed. The front spindle 41 and the back spindle 42 are arranged in a Figure 2B The front spindle 41 and the back spindle 42 are opposite to each other in the left and right direction, that is, in the Z-axis direction, and can rotate while holding the workpiece W1. In the case of a fixed spindle lathe 1, the front spindle 41 does not move in the Z-axis direction. When the workpiece W1 after the front processing is transferred from the front spindle 41 to the back spindle 42, the back spindle 42 can move in the Z-axis direction to receive the workpiece W1. The tool holders 43 and 44 that hold the tool for processing the workpiece W1 can be as shown in FIG. Figure 2B The tool rest shown is a tower type, but a comb type tool rest may also be used. As for the tools, there are turning tools including cutting tools, rotary tools such as drills or end mills, etc. The operation unit 45 has a display panel and various buttons, and accepts various operations. The NC device executes the NC program stored in the non-volatile semiconductor memory not shown. In addition, for the convenience of explanation, the horizontal direction perpendicular to the Z-axis direction is the X-axis direction, and the vertical direction perpendicular to the Z-axis direction is the Y-axis direction. In each figure, "X" indicating the X-axis direction, "Y" indicating the Y-axis direction, and "Z" indicating the Z-axis direction are shown as needed. In addition, in the lathe 1, the outer surface where the door 25 is located is the front side, and in each figure, the front direction D1, the rear direction D2, the upper direction D3, the lower direction D4, the left direction D5, and the right direction D6 are shown as needed. If there is no objection, the positional relationship of the lathe 1 is explained in conjunction with the above directions D1 to D6. In addition, when describing the positional relationship such as left and right or up and down in the drawings, the positional relationship is described after indicating the figure number.

[0049] The processing area 21 provided with the spindles 41, 42 and the tool holders 43, 44 is surrounded by a splash plate 20 having an opening 22. The machine body 10 is provided with a door 25 capable of opening and closing the opening 22 on the front side of the splash plate 20. The splash plate 20 and the door 25 have the function of isolating the processing area 21 from the operator P during the processing of the workpiece W1 to ensure the safety of the operator P, and further have the function of preventing the chips generated during the processing or the coolant used during the processing from scattering toward the outside O1 of the lathe 1. The opening 22 of the splash plate 20 is arranged in the middle of the left and right sides of the front side of the machine body 10. The door 25 is operable as shown in FIG. Figure 2A The position of the blocked opening 22 is similar to that shown in FIG. Figure 2B The sliding door slides in the Z-axis direction between the positions of the opening 22 as shown. Figure 3 As shown, the machine body 10 has a door track 12 arranged with its longitudinal direction facing the Z-axis direction. The door 25 moves in the Z-axis direction along the door track 12. The door 25 has a transparent plate, that is, a window 26 so that the processing area 21 can be observed during processing.

[0050] The machine body 10 has a coolant tank 30 at the bottom for storing chips or coolant in the inner portion 30a. Figure 3 As shown, the machine body 10 has a lower opening 11 facing downward, and the coolant tank 30 has an upper opening 31 aligned with the lower opening 11. The machine body 10 has a front inclined portion 17 and a rear inclined portion 18 that partition the processing area 21 near the lower portion of the processing area 21. The front inclined portion 17 is located in front of the processing area 21, and has an inclination that goes downward and further backward. The rear inclined portion 18 is located behind the processing area 21, and has an inclination that goes downward and further forward. The chips or coolant attached to the front inclined portion 17 and the rear inclined portion 18 are guided toward the lower opening 11 along the front inclined portion 17 and the rear inclined portion 18, and enter the interior 30a of the coolant tank 30 from the upper opening 31. The chips or coolant in the interior 30a passes through Figure 1 The chip removal device 38 shown in the figure discharges the chips to the outside O1 of the machine body 10. In addition, in a lathe having an inclined structure such as the front inclined portion 17 and the rear inclined portion 18 under the foot, since chips or coolant are guided along the inclined portion, if there is no step 50, the shoes will be soiled by the chips or coolant when the foot steps into the processing area 21. Therefore, the lathe 1 is provided with a step 50 of an inclined structure that can be provided under the foot.

[0051] A rail 33 for sliding the step 50 in the Z-axis direction is provided at the outer portion O1 on the upper edge portion 32a of the front plate portion 32 of the coolant tank 30. The rail 33 is located outside the door rail 12.

[0052] The machine body 10 has an inwardly recessed retreat portion 16 at the lower portion of the outer surface 15 where the door 25 is located. The step 50 mounted on the machine body 10 is stored in the retreat portion 16 as a storage arrangement 51 when not entering the processing area 21 .

[0053] like Figure 4 , 5 As shown, the step platform 50 includes the pedal 60 , the rotating mechanism 63 of the pedal 60 , the guide structure 65 in the Z-axis direction, the leg 70 , the tilting mechanism 75 of the leg 70 , and a pair of auxiliary legs 80 .

[0054] The pedal 60 is mounted on the machine body 10 so that the arrangement can be changed, and has a pedal surface 61 on which the operator P can stand when the step platform 50 is in the front working arrangement 52. The direction of the pedal surface 61 is substantially horizontal in the front working arrangement 52, and substantially vertical when the step platform 50 is in the storage arrangement 51. On the back surface 62 of the pedal 60, a foot portion 70, a tilting mechanism 75, and an auxiliary foot 80 are arranged.

[0055] The rotating mechanism 63 of the pedal 60 includes a pair of brackets 64 mounted on the base end 60a of the pedal 60, and a pair of fasteners FA1. The base end 60a of the pedal 60 is the edge of the pedal 60 along the rotation axis AX1, and is the edge closest to the rotation axis AX1. Each bracket 64 is fixed to the end of the long base end 60a along the rotation axis AX1 by a screw. Each fastener FA1 includes, for example, a combination of a bolt and a nut, and fastens the bracket 64 to the bracket 67 of the guide structure 65 so that they can rotate relative to each other. Through the rotating mechanism 63, the pedal 60 rotates around the rotation axis AX1 passing through the pair of fasteners FA1.

[0056] In the pedal 60, the base end 70b of the foot portion 70 is tiltably mounted around the tilt axis AX2 at the side ends 60b and 60c perpendicular to the base end 60a by a fastener FA2, and the base end 76b of the buckle 76 is rotatably mounted around the rotation axis AX3 by a fastener FA3. Each of the fasteners FA2 and FA3 includes, for example, a combination of a bolt and a nut.

[0057] The guide structure 65 includes a guide 66 slidably fitted to the rail 33 disposed in the coolant tank 30, and a pair of brackets 67 mounted on the guide 66. Each bracket 67 is fixed to the end of the upper surface of the long guide 66 along the rotation axis AX1 by a screw. The pedal 60 is mounted on the bracket 64 through the bracket 67 mounted on the guide 66 and the fastener FA1, so that the step platform 50 having the rotatable pedal 60 can slide along the rail 33 in the Z-axis direction.

[0058] Foot 70 Figure 4As shown in the figure, the pedal 60 can be supported in the front working arrangement 52 so that the operator P can stand on it. The base end 70b of the foot 70 is tiltably mounted relative to the side ends 60b and 60c of the pedal 60 with the tilt axis AX2 as the center, so that the foot 70 can tilt relative to the pedal 60. The front end 70a of the foot 70 is provided with an anti-slip member 73. Figure 4 In the case where the step 50 is in the front working configuration 52 and the foot 70 is in the use state 71 where it is pulled out from the position along the back side 62 of the pedal 60, the anti-slip member 73 is supported on the rear inclined portion 18 of the machine body 10. In the above case, the rear inclined portion 18 is an example of a mounting portion. As for the anti-slip member 73, rubber, elastomer, etc. can be used. In the foot 70, a screw SC1 passing through the slit 76c of the buckle 76 is fixed at a midway position between the base end 70b and the front end 70a.

[0059] The tilting mechanism 75 of the leg 70 includes a pair of hooks and loops 76, a fastener FA3 provided at the base end 76b of each hook and loop 76, and a screw SC1 inserted through the slit 76c of each hook and loop 76. The hook and loop 76 has a slit 76c that is long in the direction along the length direction of the hook and loop 76. The front end 76a of the hook and loop 76 is bent in a direction offset from the length direction of the hook and loop 76, and the end of the slit 76c is provided as a locking portion 76d bent in a direction D7 offset from the length direction of the hook and loop 76 in accordance with the shape. The locking portion 76d is inserted into the screw SC1 to maintain the use state 71 of the leg 70. As described above, the base end 76b of the hook and loop 76 is rotatably mounted with respect to the side ends 60b and 60c of the pedal 60 by the fastener FA3 around the rotation axis AX3. In addition, the tilting mechanism 75 allows the foot 70 to tilt with respect to the pedal 60 around the tilting axis AX2 by passing the screw SC1 fixed at the midway position of the foot 70 through the slit 76c. Figure 4 As shown in the use state 71 of the support pedal 60, and as Figure 5 This is shown along the non-use state 72 of the pedal 60 .

[0060] In addition, the direction D7 in which the locking portion 76d faces is the same as that in the operator P station. Figure 4 Therefore, the direction D7 is a preferred direction in which the screw SC1 is not easily disengaged from the locking portion 76d when the operator P stands on the pedal surface 61.

[0061] A pair of auxiliary legs 80 are mounted to be tiltable relative to the back side 62 of the pedal 60 about the tilt axis AX4 along the side ends 60b and 60c. Each tilt axis AX4 is located at the base end 80b of the auxiliary legs 80. Figure 5As shown, in the non-use state, the two auxiliary feet 80 are arranged along the pedal 60, and the front ends 80a face each other. Figure 4 As shown in this way, if the auxiliary foot 80 is raised relative to the back side 62 of the pedal 60, the front part ( Figure 4 The left part in the middle of the pedal 60 abuts against the door rail 12 of the machine body 10. Thus, even if the operator stands on the pedal surface 61 of the pedal 60 supported by the inclined foot portion 70 resting on the rear inclined portion 18, the pedal 60 does not move forward.

[0062] (3) Examples of using and storing the step platform:

[0063] Next, a usage example and a storage example of the step platform 50 will be described.

[0064] When processing workpiece W1, Figure 2A As shown in this way, the door 25 is closed, and the step 50 installed on the machine body 10 is located at the horizontal position P1 to form the storage arrangement 51. Here, the step 50 of the storage arrangement 51 can be moved along Figure 3 The rail 33 shown slides in the Z-axis direction. Therefore, even if the door 25 is closed, the operator P can easily slide the step 50 of the storage configuration 51 in the Z-axis direction passing through the horizontal positions P1 and P2. For example, there is a case where the operator P performs test cutting by looking at the window 26 of the closed door 25. If the step 50 is located at the horizontal position P2 directly below the door 25, there is a case where it becomes an obstacle when the operator P looks at the window 26. If the step 50 is retreated from the horizontal position P2 to the horizontal position P1, the operator P can observe the processing area 21 as close to the processing area 21 as possible, although through the window, by placing the toes directly below the door 25. Therefore, the step 50 located outside O1 of the machine body 10 does not become an obstacle to the operator P, and the operability of the test cutting is improved. In particular, when the retreat portion 16 is located at the lower part of the front of the machine body 10, the operator P can easily approach the processing area 21 by placing the toes of the retreat portion 16 directly below the door 25. In this way, the lathe 1 can make the step 50 of the storage arrangement 51 in a horizontal position that does not become an obstacle during processing, thereby improving the workability of the operator P. In addition, a recess for only the toes of the operator P to be placed in the retreat portion 16 directly below the door 25 may be provided. By placing the toes in the recess, the operator P can more easily approach the processing area 21.

[0065] During the pre-operation, the operator P first opens the door 25 (see Figure 2B). When the opening 22 of the splash plate 20 is open and the step 50 of the storage arrangement 51 is located at the horizontal position P1, the operator P moves the step 50 in the Z-axis direction until it is directly below the opening 22. For example, it is assumed that the step 50 is arranged at the horizontal position P2. Here, Figure 4 As shown in the figure, if the operator P moves the pedal 60 toward Figure 4 , the pedal surface 61, which is generally vertical in the storage arrangement 51, becomes generally horizontal and faces upward. In this way, the step 50 of the storage arrangement 51 becomes a front operation arrangement 52 for entering the processing area 21 from the outside O1 of the machine body 10 through the opening 22 while being mounted on the machine body 10 when the door 25 is opened. Since the pedal 60 crosses the opening 22 in the front operation arrangement 52, the door interlock function is effective because the pedal 60 becomes an interference member that hinders the closing action of the door 25. Therefore, the safety of the operator is maintained during the front operation.

[0066] However, if the foot 70 is not exposed from the back side 62 of the pedal 60, the pedal 60 is in a cantilevered state, and if the operator P stands on the pedal surface 61, a strong stress is applied to the rotating mechanism 63. Therefore, when the step platform 50 is in the storage configuration 51, the operator P only needs to tilt the foot 70 in the non-use state 72 from the back side 62 of the pedal 60 to the position as shown in FIG. Figure 4 The auxiliary foot 80 in the non-use state is tilted from the back side 62 of the pedal 60 to the position shown in the use state 71. Figure 4 If the screw SC1 enters the locking portion 76d, the foot 70 is maintained in the use state 71, the front end 70a of the foot 70 is supported on the rear inclined portion 18, and the foot 70 supports the pedal 60, and the auxiliary foot 80 inhibits the pedal 60 from moving forward.

[0067] The pedal 60 is supported in a double-armed manner by the rotating mechanism 63 and the foot portion 70, thereby improving the durability of the step platform 50. As a result, the pedal 60 can be made thinner, and the step platform 50 can be made lighter.

[0068] When the step platform 50 is a front operation configuration 52, the operator P can Figure 1 As shown in the figure, the operator P stands on the step surface 61 and enters the processing area 21 to perform the preparatory work of loading and unloading parts or discharging chips. Since the step platform 50 is located outside O1 of the machine body 10 when stored, it is not exposed to cutting oil or chips during processing. Therefore, the step surface 61 is kept clean, and even when the operator P stands on the step surface 61 during the preparatory work, the cutting oil or chips can be prevented from adhering to the shoes, and the surrounding area of ​​the machine body 10 is kept clean, and the safety is also good.

[0069] When the lathe 1 is viewed from the front, and the width of the opening 22 is wider than the width of the pedal 60, the operator P can move the step 50 of the front working arrangement 52 along the range in which the pedal 60 does not interfere with the splash plate 20 and the door 25. Figure 3 The track 33 shown slides easily in the Z-axis direction. Figure 2B To explain, if the step 50 of the arrangement 52 for front work is located at the horizontal position P2 on the relatively left side, the operator P can easily approach the front spindle 41 and the tool rest 43. In this case, it is suitable for front work around the front spindle 41 and the tool rest 43. In addition, if the step 50 of the arrangement 52 for front work is located at the horizontal position P3 on the relatively right side, the operator P can easily approach the back spindle 42 and the tool rest 44. In this case, it is suitable for front work around the back spindle 42 and the tool rest 44. Since the step 50 of the arrangement 52 for front work can move in the Z-axis direction within the width of the opening 22, the workability during the front work is improved. In addition, since the rail 33 and the guide structure 65 are provided outside the processing area, the chips are suppressed from entering between the rail 33 and the guide member 66. As a result, the smooth movement of the step 50 in the Z-axis direction is maintained, and the maintenance of the rail 33 and the guide structure 65 is easy.

[0070] After the pre-operation is completed, the operator P first moves the pedal 60 toward the center of the rotation axis AX1. Figure 4 The counterclockwise rotation is approximately 270°. As a result, the pedal surface 61, which is approximately horizontal in the front operation configuration 52, becomes approximately vertical in the back. In addition, the operator P can change the foot 70 and the auxiliary foot 80 to an inclination along the pedal 60 that does not hinder the operation. Then, the operator P closes the door 25 (see Figure 2A ). In this way, the operator P can easily withdraw and store the step 50 from the processing area 21. Here, since the pedal 60, which is approximately horizontally oriented in the front operation configuration 52, becomes approximately vertically oriented when stored, there is less space in the X-axis direction when the step is stored. In addition, by making the foot 70 and the auxiliary foot 80 inclined along the pedal 60 so as not to hinder the operation, the space in the X-axis direction when the step is stored can be reduced. Furthermore, if the step 50 of the storage configuration 51 is stored in the retreat portion 16 at the lower front portion of the machine body 10, there is no need for a dedicated space for storing the step.

[0071] Since the step 50 installed on the machine body 10 is arranged outside O1 of the machine body 10 when the workpiece is processed, the adhesion of cutting oil or chips is suppressed. Here, when the step is not installed on the machine body, the operator needs to move the step from a storage place far away from the machine body and place it in the processing area during the pre-operation, and the operator needs to move the step from the processing area and put it back to the storage place far away from the machine body during the processing, which is quite cumbersome. Since the step 50 of the lathe 1 is installed on the machine body 10 even during processing, the configuration of the step 50 can be easily changed. When the operator P opens the door 25 to perform pre-operation, the step 50 can be changed to a pre-operation configuration 52 that enters the processing area 21 from the outside O1 of the machine body 10 through the opening 22 while the step 50 remains installed on the machine body 10. The lathe 1 can easily change the step 50 from the standby state outside the machine body to the front operation configuration 52, thereby preventing the step from getting dirty and improving the workability during the front operation, and the operator can cleanly and safely approach the spindle or the tool holder. In addition, when the operator P stores the step 50 after the front operation, the step 50 can be easily sent out to the outside O1 of the machine body 10 and stored while being installed in the machine body 10.

[0072] (4) Variations

[0073] The present invention can be conceived of various variations.

[0074] The machine tool to which the present invention is applicable may be a lathe whose front spindle moves in the Z-axis direction, or may be a machine tool other than a lathe.

[0075] In the above example, the rail 33 for sliding the step 50 in the Z-axis direction is provided in the coolant tank 30, but the rail may be provided in the machine body other than the coolant tank, for example, in an exterior.

[0076] In the above example, the leg portion 70 in use is oriented in an inclined direction toward the rear inclined portion 18 , but the leg portion may be oriented substantially vertically as long as a placement portion for placing the front end of the leg portion can be ensured.

[0077] The change of the arrangement of the step platform is not limited to the above-described example. For example, when the step platform is arranged for storage, the direction of the step surface 61 may be shifted from a substantially vertical direction.

[0078] Figure 6 Modifications of the step platform 50 are schematically shown. Figure 6 The upper part of the structure shows a storage arrangement 51 for the step platform 50. Figure 6 The lower part of exemplifies the front working arrangement 52 of the step platform 50. In addition, the same reference numerals are given to the elements similar to those in the above-mentioned example, and the detailed description thereof is omitted.

[0079] Figure 6 The mechanical body 10 shown has a rail 133 for sliding the step 50 in the Z-axis direction on the outside O1. The step 50 has a guide structure 65 including a guide 166 and a bracket 167. The guide 166 is fitted with the rail 133 so as to be slidable in the Z-axis direction. The bracket 167 has a support shaft 168 that enters the long groove 163 provided at the side end 160c of the pedal 60, and is mounted on the guide 166. Although not shown, the pedal 60 is also provided with a long groove at the side end opposite to the side end 160c, and the bracket having the support shaft that enters the long groove is mounted on the guide 166. The rotating mechanism 63 for rotating the pedal 60 around the rotating axis AX1 includes the support shaft 168 and the long groove 163. In addition, since the support shaft 168 changes its relative position along the long groove 163, the support shaft 168 and the long groove 163 are a mechanism for sliding and rotating the pedal 60.

[0080] As described above, the step platform 50 can be moved through the horizontal positions P1 and P2 (see Figure 2A ) can be easily slid in the Z-axis direction, and can be moved toward the horizontal positions P2 and P3 (refer to Figure 2B ) can slide easily in the Z-axis direction.

[0081] When switching the step platform 50 from the storage configuration 51 to the front operation configuration 52, the operator can open the door and lift the step 60 upward at the horizontal position P2 or the like (see Figure 6 The double-dashed line portion at the bottom) is used to tilt the pedal 60 approximately 90 degrees toward the depth of the processing area 21 with the rotation axis AX1 as the center. As a result, the step 50 is changed into a front operation configuration 52 for entering the processing area 21 from the outside O1 of the machine body 10 through the opening 22 when the door is opened. In the case where the step 50 has a tiltable foot portion 70, the operator can switch the foot portion 70 from a non-use state along the pedal 60 to a use state 71 supporting the pedal 60. If the front end 70a of the foot portion 70, such as the anti-slip member 73, is placed on the placement portion 118 of the machine body 10, the foot portion 70 supports the pedal 60. The operator can stand on the pedal surface 61 to perform front operations.

[0082] After the pre-operation, the operator can rotate the pedal 60 about 90 degrees upward (see Figure 6The double-dashed line portion at the bottom of the step 60 is removed, and the pedal 60 is lowered as it is. As a result, the step 50 is stored outside the machine body 10, such as the retreat portion 16, while being mounted on the machine body 10. In addition, by forming the foot portion 70 in an inclination that does not interfere with the pedal 60, the space in the X-axis direction when the step is stored can be reduced. If the door is closed, subsequent workpiece processing can be performed.

[0083] Figure 6 The step platform 50 shown can also be prevented from getting dirty and improve the workability during the front operation.

[0084] In addition, if Figure 7 As exemplified above, even if the orientation of the step surface 61 does not change between the storage arrangement 51 and the front operation arrangement 52 , this is also included in the present invention. Figure 7 The upper and middle sections of the figure show the storage arrangement 51 of the step platform 50. Figure 7 The lower part of FIG. 5 shows a front working arrangement 52 of the step platform 50 . Figure 7 The machine body 10 shown also has a rail 133 for sliding the step 50 in the Z-axis direction on the outside O1. The step 50 has a guide 166 that can be slidably engaged in the Z-axis direction with respect to the rail 133. On the upper surface of the guide 166, a sliding mechanism 164 is provided for sliding the pedal 60 with the pedal surface 61 facing upward in the X-axis direction.

[0085] As described above, the step platform 50 can easily slide in the Z-axis direction passing through the horizontal positions P1 and P2 in the storage arrangement 51 , and can easily slide in the Z-axis direction passing through the horizontal positions P2 and P3 in the front operation arrangement 52 .

[0086] When switching the step platform 50 from the storage configuration 51 to the front operation configuration 52, the operator opens the door and slides the step 60 deep into the horizontal position P2 or the like (see Figure 7 Thus, the step 50 becomes a front operation arrangement 52 for entering the processing area 21 from the outside O1 of the machine body 10 through the opening 22 while being mounted on the machine body 10 when the door is opened (see Figure 7 In the case where the step platform 50 has a tiltable foot, the operator can switch the foot from a non-use state along the pedal 60 to a use state supporting the pedal 60. The operator can stand on the pedal surface 61 to perform front work.

[0087] After the front operation, if the operator slides the pedal 60 toward the front, Figure 7As shown in the middle section of FIG. 1 , the step 50 is retracted toward the outside O1 of the machine body 10 while being mounted on the machine body 10. In addition, the operator can slide the step 50 from the vicinity of the opening 22 (e.g., the horizontal position P2) toward the Z-axis direction to a position that does not interfere (e.g., the horizontal position P1). If the door is closed, subsequent workpiece processing can be performed.

[0088] Figure 7 The step platform 50 shown can also be prevented from getting dirty and improve the workability during the front operation.

[0089] Furthermore, when the step movable in the Z-axis direction includes a foot portion, a structure for determining the position of the step in the Z-axis direction may be provided on the machine body.

[0090] Figure 8 An example of a positioning structure of the step 50 slidable in the Z-axis direction is schematically shown. Figure 8 The loading portion 118 of the machine body 10 shown has a plurality of positioning portions 119 into which the front end 70a of the foot 70 (for example, the anti-slip member 73) can enter. The plurality of positioning portions 119 are arranged in the Z-axis direction. The operator moves the front step 50 configured for front operation in the Z-axis direction in such a manner that the front end 70a of the foot 70 is aligned with any of the plurality of positioning portions 119, and the front end 70a of the foot 70 can enter any of the positioning portions 119. If the front end 70a of the foot 70 enters any of the positioning portions 119, the positioning portion 119 is engaged with the front end 70a, and the front step 50 configured for front operation is fixed in such a manner that it does not move.

[0091] (5) Summary:

[0092] As described above, according to the present invention, various forms can provide a technology for a machine tool or the like that suppresses dirt on the step and improves workability during front operation. Of course, even in a technology that only includes the constituent elements of the independent patent application scope, the basic functions and effects can be obtained.

[0093] In addition, it is also possible to implement a configuration in which each configuration disclosed in the above examples is replaced with each other or is combined in a modified form, and a configuration in which each configuration disclosed in the known technology and the above examples is replaced with each other or is combined in a modified form, etc. The present invention also includes the above configurations, etc.

[0094] Explanation of symbols

[0095] 1. Lathe (example of machine tool), 10. Machine body, 11. Lower opening,

[0096] 12···door rail, 15···outer surface, 16···retracting portion, 17···front inclined portion,

[0097] 18···rear inclined portion (example of a mounting portion), 20···splash plate,

[0098] 21···processing area, 22···opening, 25···door, 26···window,

[0099] 30···coolant tank, 32···front plate, 32a···upper edge, 33···rail,

[0100] 50···Step platform, 51···Storage configuration, 52···Front operation configuration, 60···Pedal,

[0101] 61···pedal surface, 62···back surface, 63···rotating mechanism, 64···bracket,

[0102] 65···guide structure, 66···guide, 67···bracket, 70···foot,

[0103] 71···Usage state, 72···Non-use state, 73···Anti-slip member,

[0104] 75···tilting mechanism, 76···fastener, 76c···slit, AX1···rotating axis,

[0105] AX2···Tilt axis, AX3···Swivel axis, AX4···Tilt axis, D1···Front direction,

[0106] D2···backward, D3···upward, D4···downward, D5···leftward,

[0107] D6···right direction, FA1~FA3···fastener, P···operator,

[0108] P1~P3···Horizontal position, O1···External, W1···Workpiece.

Claims

1. A machine tool comprising: a machine body including a splash plate surrounding a processing area, and a door capable of opening and closing an opening of the splash plate; and A stepping platform is mounted on the machine body in a changeable configuration; and The platform is mounted on the machine body in such a manner that its horizontal position can be changed along the sliding direction of the door, and is arranged outside the machine body in a state of being mounted on the machine body when the door is closed. When the door is opened, the platform can be changed to a front operation configuration for entering the processing area from the outside of the machine body through the opening while remaining mounted on the machine body.

2. The machine tool according to claim 1, wherein the step platform has a pedal surface, the pedal surface is provided for an operator to stand on when in the front working configuration, and its orientation changes when changing from a storage configuration when the door is closed to the front working configuration. 3 . The machine tool according to claim 1 , wherein the step is capable of changing a horizontal position when the step is in a storage configuration when the door is closed. 4 . The machine tool according to claim 2 , wherein the step is capable of changing a horizontal position when the step is in a storage configuration when the door is closed. 5 . The machine tool according to claim 1 , wherein the step is capable of changing a horizontal position when the step is placed in the front working configuration.

6. The machine tool according to any one of claims 1 to 4, wherein the step platform comprises: a pedal mounted on the machine body in a changeable configuration; a foot capable of supporting the pedal so that an operator can stand on it when in the front working configuration; and a tilting mechanism for tilting the foot relative to the pedal; and The tilting mechanism can tilt the foot to a use state of supporting the pedal and a non-use state along the pedal. The machine body includes a placement portion for placing a front end of the leg portion when the step platform is placed in the front work arrangement and the leg portion is placed in the use state.

7. The machine tool according to claim 5, wherein the step platform comprises: a pedal mounted on the machine body in a changeable configuration; a foot capable of supporting the pedal so that an operator can stand on it when in the front working configuration; and a tilting mechanism for tilting the foot relative to the pedal; and The tilting mechanism can tilt the foot to a use state of supporting the pedal and a non-use state along the pedal. The machine body includes a placement portion for placing a front end of the leg portion when the step platform is placed in the front work arrangement and the leg portion is placed in the use state.

8. A machine tool comprising: a machine body including a splash plate surrounding a processing area, and a door capable of opening and closing an opening of the splash plate; and A stepping platform is mounted on the machine body in a changeable configuration; and The step is arranged outside the machine body in a state of being mounted on the machine body when the door is closed, and can be changed to a front-end operation configuration for entering the processing area from the outside of the machine body through the opening portion while maintaining the state of being mounted on the machine body when the door is opened, wherein the step comprises: a pedal mounted on the machine body in a changeable configuration; a foot that can support the pedal so that an operator can stand on it in the front-end operation configuration; and a tilting mechanism that tilts the foot relative to the pedal; and The tilting mechanism can tilt the foot to a use state of supporting the pedal and a non-use state along the pedal. The machine body includes a placement portion for placing a front end of the leg portion when the step platform is placed in the front work arrangement and the leg portion is placed in the use state.

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