Working machinery

Abstract

To provide a structure of a scatter prevention cover that does not need a lock mechanism while enhancing the efficiency of workpiece exchange work.SOLUTION: A machine tool 1 includes: a bed 3 including a processing region of a workpiece; a table 4 deformable in a longitudinal direction of the bed 3; a splash guard 10 which is arranged so as to surround the bed 3 and includes a splash guard 12 arranged at a position opposite the processing region on a side face parallel with the longitudinal direction so as to be openable and closable; and a scatter prevention cover 20 which is arranged so as to surround the processing region on an inner side of the splash guard 10. The scatter prevention cover 20 is formed of a first cover member which includes an opening part fixed to the table 4 and opened on an opening / closing door 12 side, and which is formed such that a portion except the opening part surrounds the processing region, and a second cover member fixed to the opening / closing door 12. The second cover member is configured to block the opening part when the opening / closing door 12 closed and to open the opening part when the opening / closing door 12 is opened.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a machine tool including a bed including a predetermined machining area where a workpiece is machined, a table on which the workpiece is placed and which is movable in the longitudinal direction of the bed, a splash guard including an opening / closing door which is arranged to surround the bed and which is openable and closable at a position opposite the machining area on a side parallel to the longitudinal direction, and a splash prevention cover which is arranged inside the splash guard to surround the machining area. [Background technology]

[0002] Machine tools include vertical and gantry machining centers, which have a bed including a predetermined machining area and a table that can be moved along the length of the bed, and are configured to perform machining by moving the workpiece by displacing the table on the bed. These machine tools also generally have a splash guard surrounding the bed. The splash guard prevents cutting oil used during machining of the workpiece and chips generated during machining from scattering outside the machine. The splash guard also has an opening / closing door on one of its sides, facing the machining area.

[0003] Furthermore, because the chips and cutting oil scattered as described above spread over a wide area within the splash guard, cleaning them requires a great deal of effort. Patent Document 1 therefore proposes a configuration in which a machine tool is provided with a splash prevention cover that is provided inside the splash guard and surrounds the workpiece machining area. According to this configuration, the splash prevention cover catches the chips and cutting oil and prevents them from scattering outside the machining area. This narrows the area within the splash guard where chips and cutting oil scatter, thereby reducing the effort required for cleaning. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2015-3370 Summary of the Invention [Problem to be solved by the invention]

[0005] Incidentally, the anti-scattering cover disclosed in Patent Document 1 is provided to surround the machining area as described above, and therefore has an opening formed to expose the machining area and a cover door that closes the opening so as not to interfere with the installation and replacement of a workpiece (replacement work). Furthermore, such an anti-scattering cover needs to be provided with a locking mechanism to prevent the cover door from opening during machining.

[0006] Furthermore, when carrying out the replacement work on the machine tool, the opening and closing door of the splash guard must first be opened, and then the locking mechanism must be released to open the machining area of ​​the splash guard cover, and then the cover door must be opened. After the replacement work is completed, the cover door of the splash guard must be closed again, locked by the locking mechanism, and then the opening and closing door of the splash guard must be closed.

[0007] In this way, with this machine tool, each time the replacement work is performed, it is necessary to operate the splash guard door, the locking mechanism of the splash guard cover, and the cover door, which is very cumbersome and makes the work less efficient. Moreover, in the conventional configuration, the splash guard cover itself must be equipped with a locking mechanism, which increases the cost of the device.

[0008] Therefore, an object of the present invention is to provide a configuration of a shatterproof cover that allows the replacement work to be performed more efficiently and does not require a locking mechanism. [Means for solving the problem]

[0009] In order to achieve the above-mentioned object, the present invention is characterized in that, in a machine tool such as that described above, the anti-scattering cover is composed of a first cover member fixed to the table, which includes an opening that opens toward the opening door and is formed so that the portion excluding the opening surrounds the machining area, and a second cover member for closing the opening, which is fixed to the opening door, and is configured so that the second cover member closes the opening when the opening door is closed and opens the opening when the opening door is open.

[0010] In addition, in the present invention, the machine tool may be configured so that the table has a discharge hole formed to penetrate in the thickness direction to discharge chips generated during processing of the workpiece toward the bed side, and the first cover member has a discharge portion that connects the processing area with the discharge hole. [Effects of the Invention]

[0011] In the machine tool of the present invention, the splash prevention cover is composed of the first cover member and the second cover member as described above, and the second cover member is configured to open and close the opening of the first cover member in response to the opening and closing of the opening door of the splash guard. Therefore, in this invention, when starting the replacement work, the operator simply opens the opening of the first cover member, thereby opening the machining area surrounded by the splash prevention cover. Furthermore, after the replacement work is completed, the operator simply closes the opening door, without having to perform an operation to close the opening of the splash prevention cover, thereby closing the opening and surrounding the machining area with the splash prevention cover.

[0012] Thus, according to the present invention, the machining area surrounded by the splash guard can be opened or closed simply by opening and closing the door on the splash guard, which is necessarily required when performing the replacement work, so the replacement work can be performed more efficiently than with conventional machine tools, which require the cover door on the splash guard to be opened and closed.

[0013] In addition, in the present invention, when the opening / closing door of the splash guard is closed, the opening of the first cover member is closed, i.e., closing the opening / closing door keeps the opening closed. Therefore, there is no need to provide a locking mechanism on the splash guard itself, which allows the cost of the splash guard to be kept low.

[0014] Furthermore, in the present invention, if the machine tool is configured so that the table has a discharge hole for discharging the chips of the workpiece toward the bed side, and the first cover member has a discharge section that connects the machining area with the discharge hole, the chips can be discharged more effectively and stably than in conventional machine tools that are configured to discharge the chips from outside the range of the table. [Brief explanation of the drawings]

[0015] [Figure 1] 1 is an overall perspective view showing an example of a machine tool to which the present invention is applied; [Figure 2] FIG. 2 is an enlarged perspective view of the main part of FIG. 1, showing the state in which the opening and closing door is closed. [Figure 3] FIG. 2 is a perspective view showing the state in which the opening and closing door is open. [Figure 4] FIG. 3 is a front view of FIG. 2. DETAILED DESCRIPTION OF THE INVENTION

[0016] An embodiment (example) of a machine tool according to the present invention will be described below with reference to FIGS.

[0017] Fig. 1 shows a double-column machine tool (machining center) 1 as an example of a machine tool to which the present invention is applied. The double-column machine tool 1 has a bed 3 mounted on a base 2. The bed 3 is configured to have a rectangular shape in a plan view. Therefore, hereinafter, the direction of the long side of the upper surface of the rectangular bed 3 will be referred to as the longitudinal direction, and the direction of the short side will be referred to as the width direction.

[0018] The double-column machine tool 1 also includes a table 4 that is provided on the bed 3 and on which a workpiece (not shown) is placed. The table 4 is provided to be movable in the longitudinal direction relative to the bed 3. More specifically, a pair of rail members 3a, 3a are provided on the bed 3, spaced apart in the width direction and extending in the longitudinal direction. The table 4 is placed on the rail members 3a, 3a and is provided to be movable along the rail members 3a. The table 4 is moved in the longitudinal direction on the rail members 3a, 3a by a drive mechanism (not shown) provided between the bed 3 and the table 4. Incidentally, a rotary table device or jig (not shown) is provided on the table 4, and a workpiece is placed on the table 4 via the rotary table device or jig.

[0019] The double-column machine tool 1 also includes a pair of columns 5, 5 erected on both sides of the bed 3 in the width direction, a cross rail 6 installed between the columns 5, 5, a saddle 7 installed on the cross rail 6 so as to be movable in the width direction, and a ram 8 installed on the saddle 7 so as to be movable up and down. The ram 8 supports a machining head 9 including a spindle to which a tool is attached. Both columns 5, 5 are installed so as to be located at one end of the bed 3 in the longitudinal direction. Movement of the saddle 7 relative to the cross rail 6 and movement of the ram 8 relative to the saddle 7 are performed by drive mechanisms (not shown) installed between the columns 5 and the saddle 7. Hereinafter, in such a double-column machine tool 1, the side of the column 5 in the longitudinal direction will be referred to as the rear side, and the opposite side will be referred to as the front side.

[0020] In the double-column machine tool 1, the table 4 is positioned below the ram 8, and a workpiece placed on the table 4 is machined using a tool (not shown) attached to a machining head 9. Therefore, the position on the bed 3 where the machining is performed (the position where the table 4 is positioned during machining) is the machining area, and the bed 3 includes such a machining area.

[0021] The double-column machine tool 1 is also provided with a splash guard 10 that surrounds all of the components described above. One of the side walls of the splash guard 10 that is parallel to the longitudinal direction has an opening 11 that opens to a position facing the machining area. The splash guard 10 also has an opening door 12 that closes the opening 11 in the one side wall 10a and is slidable relative to the one side wall 10a in a direction parallel to the longitudinal direction. The opening door 12 is located inside the one side wall 10a. The opening door 12 opens the opening 11 of the splash guard 10 by sliding it forward in the longitudinal direction.

[0022] Further, the double column machine tool 1 is provided with a splash prevention cover 20 that is provided on the table 4 inside the splash guard 10 so as to surround the machining area on the bed 3.

[0023] In the double column machine tool 1 configured as described above, the present invention provides a shatterproof cover that includes a first cover member fixed to the table and a second cover member fixed to the door. The first cover member has an opening that faces the door and is formed to surround the machining area except for the opening. The second cover member is configured to close the opening when the door is closed and to open the opening when the door is open. One embodiment (this embodiment) of the shatterproof cover according to the present invention will be described in detail below.

[0024] As described above, the shatterproof cover 20 is composed of the first cover member 21 and the second cover member 27. The first cover member 21 is fixed to the table 4 and is adapted to move together with the table 4. On the other hand, the second cover member 27 is fixed to the inner side of the opening / closing door 12 and is adapted to move in accordance with the sliding of the opening / closing door 12 in the longitudinal direction.

[0025] The first cover member 21 is in the form of a frame having open top and bottom surfaces and comprising front and rear end walls and left and right side walls. In the first cover member 21, the front and rear end walls 22, 23 are parallel to each other, and the left and right side walls 24, 25 are also parallel to each other. Furthermore, the first cover member 21 is formed so that the distance between the front and rear end walls 22, 23 approximately matches the longitudinal dimension of the table 4 on the double column machine tool 1, and the distance between the left and right side walls 24, 25 approximately matches the width dimension of the table 4.

[0026] The first cover member 21 is attached to the table 4 so that the front and rear end walls 22, 23 are parallel to the width direction (the left and right side walls 24, 25 are parallel to the longitudinal direction) and so that its range of existence in a plan view roughly coincides with that of the table 4. Therefore, when a workpiece is placed on the table 4, the first cover member 21 exists in a state in which it surrounds the workpiece. The first cover member 21 is attached to the table 4 by fastening screws or the like (not shown) to the table 4.

[0027] Furthermore, in such a first cover member 21, of both side walls 24, 25 of the first cover member 21, one side wall 24 that faces the opening and closing door 12 when attached to the table 4 as described above has an opening 24a cut out so that the upper edge in the vertical direction on the table 4 is open. The opening 24a is cut out up to the vicinity of the center of the side wall 24 in the vertical direction, and is cut out in the center of the side wall 24 in the longitudinal direction by a size that is about 2 / 5 of the size of the side wall 24, so that it is large enough to allow an operator to access a workpiece placed on the table 4 without any problems.

[0028] The second cover member 27 is a plate-shaped member with a rectangular plate surface. The second cover member 27 is attached to the inside of the door 12 with its plate surface parallel to the door 12 and with the long side of the plate surface aligned with the longitudinal direction. The attachment is performed using an attachment member 31 attached to the plate surface of the second cover member 27 facing the door 12, an attachment member 32 attached to the inside of the door 12, and a connecting bar 33 connecting the two attachment members 31 and 32.

[0029] The connecting bar 33 has a length such that, when the second cover member 27 is attached to the opening / closing door 12 (attached state), the plate surface of the second cover member 27 on the side opposite to the opening / closing door 12 is close to the one side wall 24 in the width direction. Therefore, in the attached state, the second cover member 27 is located in a position close to the one side wall 24 in the width direction.

[0030] The second cover member 27 is formed so that the dimension of the short side of its plate surface (the vertical direction) is approximately the same as the dimension of the one side wall 24 of the first cover member 21 on the table 4 in the vertical direction. In addition, the second cover member 27 is provided so as to be located at approximately the same position as the one side wall 24 in the vertical direction in the attached state.

[0031] Furthermore, in the attached state and with the door 12 closed, the second cover member 27 is provided so that, with respect to the first cover member 21 on the table 4 located at a standby position determined for the double column machine tool 1, the rear edge of both end edges in the long side direction of its plate surface is located rearward of the opening 24a in the longitudinal direction. However, the position of the second cover member 27 in the longitudinal direction is such that its rear edge is located forward of the opening 24a when the door 12 is open, in relation to the amount of sliding of the door 12. The standby position is a position in the longitudinal direction where the table 4 is located before or after machining of a workpiece, and where the table 4 and the opening 11 of the splash guard 10 overlap.

[0032] Furthermore, the dimension of the long side direction of the plate surface of the second cover member 27 thus provided is sized so that the opening 24a of the first cover member 21 is always closed when the opening / closing door 12 is closed. More specifically, the table 4 on which the workpiece is placed may move in the longitudinal direction on the bed 3 during machining of the workpiece. Therefore, the second cover member 27 is formed with a size in the long side direction so that the front edge of both end edges in the long side direction of the plate surface is located forward of the opening 24a of the first cover member 21 on the table 4, regardless of the position of the table 4 on the bed 3. As a result, when the opening / closing door 12 is closed, the second cover member 27 always overlaps with the opening 24a of the first cover member 21 as seen in the width direction.

[0033] Therefore, in such a double column machine tool 1, while a workpiece is being machined, the opening 24a of the first cover member 21 is always closed by the second cover member 27. As a result, during machining, the double column machine tool 1 receives scattered chips and cutting oil by the anti-scattering cover 20, preventing them from scattering outside the machining area.

[0034] After the machining, the workpiece is installed or replaced (replacement work). When the replacement work is performed, the table 4 is first positioned at the standby position. In this state, the worker opens the door 12 to enter the splash guard 10. As the door 12 is opened, the second cover member 27 attached to the door 12 also moves forward, which is the sliding direction of the door 12. Because the second cover member 27 is positioned as described above in the longitudinal direction, this movement opens the opening 24a of the first cover member 21. This opens the machining area surrounded by the splash guard cover 20 at the opening 24a, making it easier for the worker to perform the replacement work.

[0035] After the replacement work is completed, the worker exits from the splash guard 10 and closes the opening / closing door 12, and as this operation is performed, the second cover member 27 also moves rearward to return to the position it was in before the opening / closing door 12 was opened. As a result, the opening 24a of the first cover member 21 is again closed by the second cover member 27, and the scattering prevention cover 20 prevents the above-mentioned chips and the like from scattering outside the machining area.

[0036] As described above, in the double column machine tool 1 of this embodiment, the second cover member 27 is attached to the opening / closing door 12 of the splash guard 10, which is necessarily opened and closed when performing the replacement work. Therefore, by simply opening and closing the opening 24a in the first cover member 21 for the replacement work and closing it for machining, without having to perform a separate operation to move the second cover member 27, the worker can thereby perform the replacement work efficiently.

[0037] Furthermore, since the opening / closing door 12 is kept closed, the opening 24a is also kept closed by the second cover member 27, so it is not necessary to provide the shatterproof cover with a locking mechanism for preventing the second cover member 27 from moving during processing of the workpiece, which makes it possible to keep the cost of the shatterproof cover low.

[0038] In this embodiment, the table 4 has discharge holes 4a formed to penetrate the table 4 in the thickness direction (the vertical direction) for the purpose of discharging chips and the like. Two discharge holes 4a are formed side by side in the width direction. The two discharge holes 4a, 4a are formed to extend over the entire length of the table 4 excluding both end portions.

[0039] The shatterproof cover 20 also includes a pair of guide plates 26, 26 attached to the inner sides of the left and right side walls 24, 25 of the first cover member 21. Each guide plate 26 is formed of a plate member having a rectangular end face. Each guide plate 26 is bent in the thickness direction at the center of the short side of its end face, with the other end forming an angle of approximately 45° with respect to the bent portion. Each guide plate 26 is attached to the corresponding side wall 24, 25 at its one end with the long side of its end face aligned with the longitudinal direction. When attached, the other end of each guide plate 26 is positioned lower than the one end, and the other end moves inward relative to the corresponding side wall 24, 25 as it extends downward.

[0040] The guide plate 26 is attached to the side walls 24, 25 using screws or the like (not shown). However, in order to more appropriately position the guide plate 26 in the width direction relative to the discharge hole 4a of the table 4, the guide plate 26 may be attached with a spacer or the like sandwiched between the side walls 24, 25.

[0041] With this configuration, the chips and the like received by the scattering prevention cover 20 as described above will pass through the discharge holes 4a formed in the table 4 and fall toward the bed 3 (outside the machining area). Moreover, since the two guide plates 26, 26 are attached to the side walls 24, 25 of the first cover member 21 in the manner described above, the guide plates 26 guide the chips and the like toward the discharge holes 4, so that they fall more effectively into the discharge holes 4. Therefore, with this configuration, most of the chips and the like received by the scattering prevention cover 20 will reach the outside of the table 4, and the accumulation of chips and the like in the machining area will be minimized.

[0042] Furthermore, the bed 3 is formed with a discharge groove 3b between the pair of rail members 3a, 3a in the width direction to receive chips and the like that fall from the discharge holes 4a of the table 4. In the illustrated example, two discharge grooves 3b are formed side by side in the width direction to correspond to the discharge holes 4a of the table 4. Furthermore, each discharge groove 3b extends to near the front end in the longitudinal direction, and its bottom surface is inclined so that it becomes lower from the rear side to the front side. Furthermore, each discharge groove 3b is formed so that its front end opens onto the outer surface of the bed 3.

[0043] With this configuration, chips and the like that fall from the discharge holes 4a of the table 4 as described above fall into each discharge groove 3b of the bed 3, then flow over the bottom surface of each discharge groove 3b and fall out of the bed 3 from the openings formed at the front ends. In the example shown in the figure, a conveyor 30 is provided on the front side of the bed 3 to receive chips and the like that fall from the openings of each discharge groove 3b. Then, chips and the like that fall from these openings are discharged out of the splash guard 10 by the conveyor 30.

[0044] In the configuration described above, the first cover member 21 is formed in the shape of a frame with open top and bottom surfaces, as described above. That is, the first cover member 21 is configured so that the inner space communicates with the outside at the open portion at the lower edge. The open portion also communicates with the processing area and the discharge hole 4a of the table 4. Therefore, the open portion that communicates with the processing area and the discharge hole 4a corresponds to the discharge portion of the first cover member.

[0045] The above describes one embodiment of a machine tool to which the present invention is applied (hereinafter referred to as "the embodiment"). However, the present invention is not limited to the configuration described in the embodiment, and can be implemented in other embodiments (variations) such as the following.

[0046] (1) Regarding the opening of the first cover member, in the above embodiment, the opening 24a is sized so as to be cut out to near the center of the side wall 24 in the vertical direction, and is formed so as to be approximately 2 / 5 the size of the side wall 24 in the longitudinal direction. However, in the present invention, the opening of the first cover member may be formed in any size as long as it is large enough to allow an operator to access a workpiece placed on the table without any problems. Therefore, the opening may be formed so as to be open across the extent of one of the side walls 24 in the vertical direction, for example.

[0047] (2) Regarding the attachment of the second cover member to the door of the splash guard, in the above-described embodiment, the second cover member 27 is attached to the door 12 of the splash guard 10, which is configured so that the opening 11 is opened when the door 12 slides forward in the longitudinal direction. The second cover member 27 is attached to the door 12 in such a manner that the opening 24a of the first cover member 21 is opened as the door 12 slides forward. However, splash guards in existing machine tools are not limited to doors configured as in the above-described embodiment. The second cover member of the present invention may be attached to the door in any suitable manner depending on the configuration of the door of the splash guard.

[0048] Specifically, some splash guards for machine tools have an opening formed toward the front in the longitudinal direction, and the door is configured to slide rearward. When the splash guard is configured in this manner, the second cover member can be attached to the door in such a way that the opening of the first cover member is opened as the door slides rearward. Even in this case, the second cover member is sized in the longitudinal direction so that it always overlaps with the opening in the width direction when the door is closed.

[0049] Furthermore, some splash guards are not configured with a single-wing door that slides forward or backward as described above, but are configured with a double-wing door consisting of two doors, one on the left and one on the right. If the splash guard is configured in this way, the second cover member may be attached to one of the left and right doors in the manner described in the above embodiment and example.

[0050] In addition, in the present invention, the second cover member is not limited to being composed of a single member as in the above-described embodiment. Therefore, if the splash guard door is a double-door type as described above, a plate (cover member piece) may be attached to each of the left and right doors constituting the door, and the two cover member pieces may be combined to form the second cover member. In this case, each cover member piece may be attached in a position such that its respective longitudinal extent does not overlap the opening of the first cover member when the door is open, and that its respective longitudinal extent overlaps with the center of the opening when the door is closed in the width direction. Furthermore, the longitudinal size of each cover member piece is set so that the longitudinal extent of the second cover member, consisting of the two cover member pieces, always overlaps with the opening of the first cover member when the door is closed and in the overlapping state.

[0051] (3) Regarding the shatterproof cover including the guide plate, in the above-described embodiment, the shatterproof cover 20 includes a pair of guide plates 26, 26 attached to the left and right side walls 24, 25 of the first cover member 21, and is configured to have a function (guide function) that allows chips and the like to fall more effectively into the discharge hole 4a of the table 4. However, even when the shatterproof cover is configured to have such a guide function, the configuration is not limited to the above-described embodiment in which the guide plates are attached to the side walls of the first cover member, and the first cover member itself may be formed to have the guide function. Specifically, the first cover member may be configured so that the lower portions of its side walls are bent inward like the guide plate 26 in the above-described embodiment.

[0052] Furthermore, the structure for providing such a guide function does not have to be provided on both side walls of the first cover member as described above, but may be provided on only one of the side walls. Furthermore, in the shatterproof cover of the present invention, the guide function is not essential, and the shatterproof cover may be configured without the guide function.

[0053] (4) Regarding the configuration of the shatterproof cover and the table, in the above-described embodiment, the first cover member 21 of the shatterproof cover 20 is formed so that its size in the longitudinal direction and the width direction is approximately the same as that of the table 4, and is attached to the table 4 so that its area of ​​existence is approximately the same as that of the table 4 in a plan view. However, in the present invention, the first cover member is not limited to being formed so as to be approximately the same size as the table. For example, it may be formed so that it is larger than the table in the longitudinal direction or the width direction. In such a case, the first cover member has a portion that does not overlap with the area of ​​existence of the table in a plan view. Therefore, if the first cover member is configured in this manner, chips and the like received by the shatterproof cover will fall toward the bed side from the portion that does not overlap with the table. Furthermore, in such a case, although a discharge hole is formed in the table to allow chips and the like within the area of ​​existence of the table to fall toward the bed side in the above-described embodiment, the discharge hole in the table may be omitted.

[0054] Furthermore, in the scattering prevention cover of the present invention, the first cover member is not limited to having an open bottom surface so that chips and the like can fall onto the bed side, but may be formed with a closed bottom surface. In that case, however, chips and the like will accumulate inside the scattering prevention cover, and the worker will have to collect the chips and the like inside the scattering prevention cover.

[0055] (5) With regard to the machine tool to which the present invention is applied, the double-column machine tool 1 in the above embodiment is configured so that chips and the like fall from the machining area on the table 4 toward the bed 3, and a conveyor 30 for discharging the chips and the like that have fallen from the bed 3 is attached to the bed 3. However, in the present invention, even if the machine tool is configured so that chips and the like fall from the machining area toward the bed, the machine tool is not limited to one that has a conveyor as in the above embodiment. For example, the machine tool may be configured to have, instead of the conveyor, a collection box that can receive and collect chips and the like that have fallen from the bed.

[0056] Furthermore, the present invention is not limited to application to a double-column machine tool (machining center) as in the above embodiment, but can also be applied to other types of machine tools such as a vertical machining center.

[0057] The present invention is not limited to the above-described embodiment, and can be modified as appropriate within the scope of the invention. [Explanation of symbols]

[0058] 1 Machine tool (column machine tool) 3 beds 3a drain groove 4 tables 4a drain hole 10 Splash Guard 11 Open area 12 Opening and closing doors 20 Anti-scattering cover 21 first cover member 24 Side wall 24a opening 25 Side wall 26 Signboard 27 Second cover member 30 Conveyor 31 Mounting material 32 Mounting material 33 Connecting bar

Claims

1. A machine tool including a bed including a predetermined machining area where a workpiece is machined, a table on which a workpiece is placed and which is provided so as to be displaceable in the longitudinal direction of the bed, a splash guard provided so as to surround the bed and which includes an openable / closable door provided so as to be openable / closable at a position facing the machining area on a side surface parallel to the longitudinal direction, and a splash prevention cover provided inside the splash guard so as to surround the machining area, The shatterproof cover is composed of a first cover member fixed to the table, the first cover member including an opening that opens to the door side and a portion excluding the opening that surrounds the processing area, and a second cover member for closing the opening, the second cover member fixed to the door, The second cover member is provided to close the opening when the door is closed and to open the opening when the door is open. A machine tool characterized by:

2. the table has a discharge hole formed to penetrate the table in a thickness direction in order to discharge chips generated during machining of the workpiece to the bed side, The first cover member has a discharge portion that connects the processing area with the discharge hole.

2. The machine tool according to claim 1.

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