JP2009095891A - Telescopic cover device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a telescopic cover device partitioning two regions in a sealed state and highly preventing cutting chips and a cutting liquid generated in one of the regions from leaking to the other region. <P>SOLUTION: The telescopic cover device 40 includes an upper rail 42, a lower rail 43, a telescopic cover 41 and a partitioning member 44. The telescopic cover 41 and the partitioning member 44 partition a first region S1 and a second region S2. The telescopic cover 41 comprises a plurality of cover members 41A-41F which are placed side by side while shifting in position in a breadthways direction in a partially overlapping state. The cover member at one breadthways end is the fixed cover member 41A fixed to the upper rail 42 and the lower rail 43, and other cover members are movable cover members 41B-41F movable in the breadthwise direction for the upper rail 42 and the lower rail 43. The upper rail 42 is placed in contact with the partitioning member 44. Upper ends of the movable cover members 41B-41F are movably suspended from the upper rail 42. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a telescopic cover device that partitions a processing region and a region where a moving mechanism of a processing device is located in a machine tool such as a lathe.

  In machine tools such as lathes, in order to prevent chips and cutting fluid generated by machining from adhering to the movement mechanism of machining equipment such as the spindle and tool post, the area where the machining mechanism and the movement mechanism of the machining equipment are located There is provided a telescopic cover for partitioning (hereinafter referred to as “movement mechanism region”). The telescopic cover is expanded and contracted in accordance with the movement of the processing equipment, so that the processing area and the movement mechanism area are always kept in a partitioned state. For example, the telescopic cover described in Patent Document 1 is provided in a lathe of a type in which a spindle moves and performs a turning process on a workpiece, and includes a machining area and an area where a spindle moving mechanism (saddle) is located. Partitioning.

In the case of a lathe of the type in which the spindle and the tool post are arranged side by side and the spindle moves in the front-rear direction and the tool post moves in the left-right direction, the telescopic cover is used for the tool rest. And the side plate portion of the bed located on the side thereof, and is configured to expand and contract in the left-right direction as the tool post moves.
Japanese Utility Model Publication No. 7-3945

  FIG. 12 is a front view and a side view of a conventional example of a telescopic cover provided on a lathe in which the main spindle and the tool post are arranged in the front-rear direction. The telescopic cover 41 is composed of a plurality of cover members 41A to 41F arranged with their positions being shifted in the width direction (left-right direction) in a state where a part thereof overlaps each other. One of the cover members is a fixed cover member 41A fixed to the side plate 4a of the bed, and the other cover member is a movable cover member 41B that moves in the width direction in accordance with the movement of the tool post 7. ~ 41F. A movable cover member 41 </ b> F located at the opposite end in the width direction from the fixed cover member 41 </ b> A is fixed to the tool rest 7. Each movable cover member 41B-41F moves along the upper rail 42 and the lower rail 43 which are mutually parallel.

  The movable cover members 41 </ b> B to 41 </ b> F are provided with seal members 64 for improving the airtightness of the overlapping portions of the cover members 41 </ b> A to 41 </ b> F. The upper end portion 41a and the lower end portion 41b of the telescopic cover 41 have a holding structure in which the cover members 41A to 41F are bent in a state of overlapping each other so that the seal member 64 is in close contact with the cover member to be overlapped. ing. In relation to the adoption of this structure, the movable support members 46 and 47 that movably support the movable cover members 41B to 41F with respect to the upper rail 42 and the lower rail 43 are the upper end portions of the movable cover members 41B to 41F. Further, the lower end portion is structured to move along the upper surfaces of the upper rail 42 and the lower rail 43, respectively.

  A covering member 44 is provided above the telescopic cover 41 so that chips and cutting fluid in the processing region S1 do not enter the moving mechanism region S2 through the telescopic cover 41. However, in practice, there is a gap 80 between the telescopic cover 41 and the covering member 44. Although the gap 80 between the cover member 41F closest to the processing region S1 and the processing region side hanging portion 44c of the cover member 44 can be made as narrow as possible, the other cover members 41A to 41E and the hanging portion 44c The gap 80 between them cannot be eliminated. For this reason, it has not been possible to prevent chips and cutting fluid from leaking from the gap 80 through the path 81 indicated by the arrow.

An object of the present invention is to provide a telescopic cover device that partitions two regions into a sealed state, and can highly prevent leakage of chips and cutting fluid generated in one region into the other region. .
Another object of the present invention is to show a structure capable of smoothly expanding and contracting a telescopic cover device.
Still another object of the present invention is to install and contract the telescopic cover by suspending and supporting each cover member of the telescopic cover, which is suitable for installation as a partition between the machining area and the moving mechanism area in an actual machine tool. Is a smooth telescopic cover device.

  The telescopic cover device according to the present invention includes an upper rail and a lower rail that are parallel to each other along a horizontal direction, one end in the width direction is fixed to the upper rail and the lower rail, and the other end in the width direction is the upper rail. And a telescopic cover which is movable along the lower rail and can be expanded and contracted in the width direction, and partitions the first area and the second area together with the telescopic cover. The telescopic cover is composed of a plurality of cover members that are arranged with their positions overlapped with each other in a partially overlapping state, and the cover member at one end in the width direction is connected to the upper rail and the lower rail. The other cover member is a movable cover member that is movable in the width direction with respect to the upper rail and the lower rail, and the upper rail is a fixed cover member fixed to the upper rail. Wherein disposed in contact with the partition member, this upper rail, was hung structure movably upper portion of the movable cover member in the width direction.

  According to the structure of this invention, the clearance gap between a partition member and an upper rail can be eliminated by arrange | positioning an upper rail in contact with a partition member. Arranging the upper rail as described above can be realized without difficulty by complicating the structure by suspending the upper end of the movable cover member so as to be movable in the width direction on the upper rail. Thereby, in the space on both sides of the telescopic cover, foreign matter such as chips and cutting fluid generated in either the first region or the second region is prevented from leaking to the other region through the telescopic cover. Can do. In addition, it is necessary to eliminate a gap between the upper rail and the movable cover by taking appropriate measures. For example, the structure which inserted the upper end part of the movable cover into the inside of an upper rail is employable.

In the present invention, the upper rail has a guide groove along the width direction of the telescopic cover, and a rolling member which is guided by the guide groove and can freely roll is preferably provided at the upper end of each movable cover member. .
By causing the rolling member provided at the upper end of the movable cover member to guide the guide groove along the width direction of the telescopic cover, the movable cover member can be smoothly moved in the width direction.

In the present invention, the upper rail and the lower rail are located at positions separated from each other in a direction perpendicular to the width direction of the telescopic cover, and the telescopic cover has an upper end portion and a lower end portion directed in the vertical direction, and an intermediate portion thereof. Can be configured to be inclined.
In this configuration, the machine tool is moved in the width direction of the telescopic cover, and the tool support surface is inclined in the direction orthogonal to the width direction, and the tool rest is positioned in the width direction of the telescopic cover with respect to the tool rest. It is suitable for a telescopic cover device provided between an object such as a bed. In the case of the tool post, the tool is positioned on the upper side of the inclined tool support surface, and the moving mechanism of the tool post is positioned on the lower side. Therefore, when the telescopic cover device is installed by aligning the intermediate inclined portion of the telescopic cover with the blade support surface of the tool post as viewed from the width direction, the processing region and the moving mechanism region can be partitioned by the telescopic cover. Foreign matter such as chips and cutting fluid adhering to the telescopic cover on the processing area side is guided downward along the intermediate inclined portion of each telescopic cover. Since the upper end portion of the telescopic cover is directed in the vertical direction, each cover member of the telescopic cover can be suspended and supported, whereby the telescopic cover can be smoothly expanded and contracted.

  The telescopic cover device according to the present invention includes an upper rail and a lower rail that are parallel to each other along a horizontal direction, one end in the width direction is fixed to the upper rail and the lower rail, and the other end in the width direction is the upper rail. And a telescopic cover which is movable along the lower rail and can be expanded and contracted in the width direction, and partitions the first area and the second area together with the telescopic cover. The telescopic cover is composed of a plurality of cover members that are arranged with their positions overlapped with each other in a partially overlapping state, and the cover member at one end in the width direction is connected to the upper rail and the lower rail. The other cover member is a movable cover member that is movable in the width direction with respect to the upper rail and the lower rail, and the upper rail is a fixed cover member fixed to the upper rail. Since it is arranged in contact with the partition member and suspends the upper end portion of the movable cover member in the upper rail so as to be movable in the width direction, for example, as a processing region and a second region as the first region The moving mechanism region can be partitioned into a sealed state, and it is possible to highly prevent chips and cutting fluid generated in the processing region from leaking to the moving mechanism region.

  The upper rail has a guide groove along the width direction of the telescopic cover, and when a rolling member guided by the guide groove and capable of rolling is provided at the upper end of each movable cover member, the movable cover It is preferable because the member can be moved smoothly in the width direction.

  The upper rail and the lower rail are located at positions separated from each other in a direction perpendicular to the width direction of the telescopic cover, and the upper and lower ends of the telescopic cover are directed in the vertical direction, and the intermediate portion is inclined. The telescopic cover is suitable for installation as a partition between the machining area and the moving mechanism area in an actual machine tool, and the telescopic cover can be expanded and contracted smoothly by suspending and supporting each cover member of the telescopic cover. It becomes a device.

  An embodiment of the present invention will be described with reference to the drawings. 1 to 3 show a lathe equipped with a telescopic cover according to the present invention. In the lathe, a headstock 6 supporting a main shaft 5 is installed on a bed 4 so as to freely advance and retreat in the front-rear direction (Z-axis direction). The main shaft 5 faces in the front-rear direction (Z-axis direction), and a main shaft chuck 5a is provided at the front end thereof. A tool post 7 is provided in front of the main shaft 5 so as to be movable in the left-right direction (X-axis direction). The main shaft 5 and the tool post 7 are processing devices for processing a workpiece, and are arranged in a processing region S1 closed from the outside.

  The bed 4 has a box shape with a structure including left and right side plate portions 4a and a rear base portion 4b and a front base portion 4c provided between the left and right side plate portions 4a. A space 8 between the rear base portion 4b and the front base portion 4c that continues below the processing region S1 is a discharge space for chips generated during turning. In addition, a pair of left and right leg portions 4d are provided at the lower portion of the bed, which is a portion below the rear base portion 4b and the front base portion 4c. A space between the pair of left and right legs 4d is a coolant tank arrangement space.

  The main shaft 5 which is a rear processing device is rotatably supported by the main shaft 6 and is rotated by a main shaft motor (not shown) provided inside the main shaft 6. The headstock 6 is installed on the rear base portion 4b of the bed 4 so as to be able to advance and retreat in the front-rear direction, and is moved back and forth by a back-and-forth movement mechanism (not shown) provided below the headstock 6. The headstock guide means 9 for guiding the headstock 6 in the front-rear direction is provided with a pair of front-rear guide rails 9 a extending in the front-rear direction on both the left and right sides of the headstock 6, and protruding on both the left and right sides of the headstock 6. The guided body 9b is movable forward and backward on the front and rear guide rail 9a. The guided body 9b is composed of, for example, a linear motion rolling bearing.

  A tool post 7 which is a front processing device includes a tool 10, a tool holder 11 that supports the tool 10, and a slide member 12 that supports the tool holder 11. The slide member 12 is provided on the bed 4 so as to be slidable in the left-right direction via the slide member guide means 13. The slide member guide means 13 includes a pair of front and rear slide guide rails 13 a installed horizontally on the front platform 4 d of the bed 4 and a guided body 13 b attached to the lower surface of the slide member 12. The guided body 13b is composed of, for example, a linear motion rolling bearing.

  As a moving mechanism 18 that moves the tool post 7 to the left and right, a screw shaft 14, a nut 15, a slide motor 16, and the like are provided. The screw shaft 14 is a shaft facing in the left-right direction with a screw cut on the outer periphery, and is rotatably supported between the pair of slide guide rails 13a. The nut 15 is attached to the lower surface of the slide member 12 and is screwed to the screw shaft 14. The slide motor 16 is provided below the screw shaft 14, and a transmission chain 17 is hung on a claw wheel 16 a attached to the motor shaft and a claw wheel 14 a attached to the screw shaft 14. When the slide motor 16 is rotated, the screw shaft 14 rotates and the nut 15 moves along the screw shaft 14. Thereby, the slide member 12 slides along the slide guide rail 13a, and the tool post 7 moves to the left and right.

  The slide member 12 includes a main body portion 12a to which the guided body 13b is attached to the lower surface, and a tool holder attachment plate 12b that is integrally fixed to a rear surface of the main body portion 12a. The surface on the back side of the main body 12a is an inclined surface that rises obliquely forward from the lower end. Therefore, the tool holder mounting surface 12c of the tool holder mounting plate 12b is an inclined surface positioned on the lower side toward the side closer to the main shaft 5.

  The upper part of the headstock 6 and the tool rest 7 is covered with a machine body cover 20. The front portion of the body cover 20 is a front door portion 20a that can be opened and closed. The front part of the bed 4 is covered with a front cover 21. The front cover 21 is provided slightly forward from the front base 4c of the bed 4 and the space between the front cover 21, the tool post 7 and the front base 4c is the movement of the tool base 7. This is a moving mechanism area S2 in which the mechanism 18 is arranged. Between the slide member 12 and the left and right bed side plate portions 4a, there is a pair of left and right telescopic cover devices 40 that prevent chips and cutting fluid generated in the processing region S1 from entering the moving mechanism region S2. Is provided. The telescopic cover device 40 will be described in detail later.

  An operation panel 23 is installed on the front cover 21. A control panel 24 for controlling the machine tool is installed along the back surface of the bed 4. The control panel 24 may be attached to the bed 4 via an attachment member (not shown), or may be installed on the floor via a support base (not shown). .

  A coolant tank 30 is attached to the lower portion of the bed 4 so as to float from the floor surface F. The coolant tank 30 extends from the front end to the rear end of the bed 4 and further protrudes rearward of the bed 4. A circulation motor 31 that circulates the internal coolant is provided at the rear end of the coolant tank 30. The upper surface portion of the coolant tank 30 facing the space 8 where the chips are discharged is open.

  A chip conveyor 32 is provided inside the coolant tank 30. The chip conveyor 32 is configured such that an endless conveyor rotating body 33 made of a net or a belt with holes or the like that passes oil and prevents the passage of chips can be rotated in a conveyor case 34 via a guide 35 such as a roller. It is provided. The conveyor rotating body 33 is rotationally driven by a conveyor drive motor 36 provided at the rear end of the chip conveyor 32. The conveyor case 34 of the chip conveyor 32 has an open upper surface at a portion corresponding to the space 8 of the bed 4. The chip conveyor 32 has an inclined portion 32a in which a portion protruding rearward from the bed 4 is inclined upward, and discharges chips of the conveyor rotating body 33 from the upper end of the inclined portion 32a.

  A telescopic cover device 40 is shown in FIGS. The telescopic cover device 40 can be expanded and contracted in the width direction, and the telescopic cover 41 that partitions the processing region S1 as the first region and the moving mechanism region S2 as the second region can be expanded and contracted. An upper rail 42 and a lower rail 43 to be supported, and a cover member 44 as a partition member that partitions the processing region S1 and the moving mechanism region S2 together with the telescopic cover 41 are provided. In this embodiment, the width direction of the telescopic cover 41 is the left-right direction.

  As shown in FIGS. 4 and 5, the telescopic cover 41 includes a plurality of, for example, six cover members 41 </ b> A to 41 </ b> F that are arranged with their positions shifted in the left-right direction in a state where a part of the telescopic cover 41 overlaps the front and rear. Among them, the cover member closest to the bed side plate part 4 a is a fixed cover member 41 </ b> A fixed to the upper rail 42 and the lower rail 43. In this embodiment, the fixed cover member 41 </ b> A is fixed to the bed side surface plate portion 4 a integrated with the upper rail 42 and the lower rail 43. The other cover members are movable cover members 41 </ b> B to 41 </ b> F that are movable in the left-right direction with respect to the upper rail 42 and the lower rail 43. The movable cover member 41 </ b> F closest to the tool rest 7 is fixed to the slide member 12 of the tool rest 7 and moves to the left and right integrally with the tool rest 7. The upper end part 41a and the lower end part 41b of each cover member 41A-41F face the up-down direction, and the intermediate part 41c is inclined upward. This inclination corresponds to the inclination of the tool holder mounting surface 12c of the slide member 12.

  The cover member 44 has a shape that covers the upper end portion of the telescopic cover 41, a horizontal portion 44a that is located above the upper end of the telescopic cover 41, a front hanging portion 44b that is suspended from the front end of the horizontal portion 44a, and a horizontal portion 44a. It consists of a rear hanging part 44c that hangs down from the rear end. The rear hanging portion 44c has a vertical length that covers the rear of the upper rail 42 and the upper end portions 41a of the cover members 41A to 41F.

  The upper rail 42 and the lower rail 43 are parallel to each other, and the upper rail 42 is located above and in front of the lower rail 43. The front is a direction orthogonal to the width direction of the telescopic cover 41. The upper rail 42 is fixed to the covering member 44 by a fixing tool 45 such as a bolt. Specifically, the upper surface and the rear surface of the upper rail 42 are brought into contact with the lower surface of the covering member horizontal portion 44a and the front surface of the trailing portion 44c without any gaps, and the fixture 45 is attached to the covering member trailing portion 44c and the upper rail 42. It is inserted and fixed from the back. The lower rail 43 is also used by the rear slide guide rail 13a. And by the upper rail 42 and the lower rail 43, the upper end part and lower end part of each movable cover member 41B-41F are supported so that a movement in the left-right direction is possible. The structure of the movement support portions 46 and 47 will be described below.

  FIG. 6 is a cross-sectional view taken along the line VI-VI in FIG. The upper rail 42 has guide grooves 50 </ b> A to 50 </ b> F in the left-right direction in which the upper ends of the cover members 41 </ b> A to 41 </ b> F are inserted. Among these, rolling guide portions 51B to 51F having a circular cross section are formed in the guide grooves 50B to 50F into which the upper ends of the movable cover members 41B to 41F are inserted. The vertical positions of the rolling guide portions 51B to 51F are shifted up and down every other. Accordingly, the guide grooves 50A to 50F can be provided close to each other in the front-rear direction, and the front-rear dimension of the upper movement support portion 46 can be shortened. Rolling members 52 are provided at the upper ends of the movable cover members 41B to 41F so as to be able to roll while being guided by the rolling guide portions 51B to 51F. Specifically, the rolling member 52 is a ball, and the rolling member 52 is fitted into a through hole 53 formed at the upper end of the movable cover members 41B to 41F. It is also rotatable in the direction of.

  More specifically, the upper rail 42 is formed by stacking a plurality of plate materials in the front-rear direction. As shown in FIG. 6, the plurality of plate members are interposed between a guide groove constituting plate member 54 that constitutes one of the guide grooves 50 </ b> A to 50 </ b> F in a set of two sheets, and the one set of guide groove constituting plate members 54. The intermediate plate member 55 and the spacer plate members 56 disposed between the adjacent guide groove member plates 54 that are not paired with each other and on the front and rear outer sides of the guide groove member members 54 at both front and rear ends. The guide groove constituting plate material 54 is made of a metal plate such as an iron plate, and a portion to be the rolling guide portion 51 is processed into a circular arc shape by pressing or the like.

  The upper rails 42 are assembled by fixing the plate members 54, 55, 56 to the covering member 44 by the fixing tool 45. At that time, the upper ends of the movable cover members 41 </ b> B to 41 </ b> F in which the rolling member 52 is fitted in the through hole 53 in advance are sandwiched between the pair of guide groove constituting plate members 54. The rolling members 52 of the movable cover members 41B to 41F are guided by the rolling guide portions 51B to 51F of the guide grooves 50B to 50F and are held so as to freely roll. Accordingly, the movable cover members 41 </ b> B to 41 </ b> F are supported in a state in which the movable cover members 41 </ b> B to 41 </ b> F are suspended from the upper rail 42 so as to be movable in the left-right direction. Since the fixed cover member 41A does not have the rolling member 52, the upper end may be inserted into the guide groove 50A later.

  The lower support portion 47 makes the slider 60 provided on the movable cover members 41B to 41E except the movable cover member 41F fixed to the slide member 12 slidably contact the upper surface of the lower rail 43 and a part of the front surface. Structure. The slider 60 is made of a material having a low sliding resistance such as a synthetic resin. As shown in FIGS. 7 and 8, the back plates 61B to 61E to which the slider 60 is attached are provided perpendicular to the edge of the movable cover members 41B to 41E on the slide member 12 side, and project greatly toward the moving mechanism region S2. A large protrusion 61a that protrudes slightly and a small protrusion 61b that slightly protrudes toward the processing region S1. The slider 60 is attached to the lower part of the large protrusion 61a (see FIG. 9). The fixed cover member 41A includes a back plate 61A similar to the back plates 61B to 61E, and a mounting plate portion 41Aa provided on an edge opposite to the back plate 61A. In this mounting plate portion 41Aa, It is attached to the bed side face plate portion 4a by a fixture such as a solid bolt. The movable cover member 41F does not have a back plate, has a mounting plate portion 41Fa, and is fixed to the slide member 12 by a mounting tool such as a bolt at the portion of the mounting plate portion 41Fa.

  The pair of overlapping cover members are in sliding contact with each other without a gap. FIG. 8 shows the sliding contact portion. Hereinafter, the sliding contact portions of the movable cover member 41C and the movable cover member 41D illustrated in FIG. 8 will be described, but the other sliding contact portions have the same structure. A holding member 63 is attached to the end of the movable cover member 41D on the processing region S1 side opposite to the back plate 61D, and the sealing member 64 is held by the holding member 63. The seal member 64 is in contact with the cover member 41C on the movement mechanism region S2 side. The seal member 64 is made of an elastic material such as rubber or resin. Thus, by making the movable cover member 41C and the movable cover member 41D slidably contact each other via the seal member 64, the gap between the movable cover members 41C and 41D can be eliminated, and the processing area S1 and the moving mechanism area S2 is kept airtightly shielded.

  In the vicinity of the holding member 63, a protrusion 65 protruding toward the processing region S1 is provided. The protrusion 65 is a stopper that restricts the movement of the movable cover members 41 </ b> B to 41 </ b> F when the telescopic cover 41 is expanded. For example, in FIGS. 7 and 8, when the movable cover member 41D is moved leftward and the overlapping width of the pair of movable cover members 41C and 41D is minimized, the protrusion 65 of the movable cover member 41D is movable. The movable cover member 41D cannot move any more by contacting the small protrusion 61b of the back plate 61 of the cover member 41C.

  Further, cushioning materials 66 and 67 for cushioning and silencing when the telescopic cover 41 is reduced are attached to the large protrusion 61a of the back plate 61 at a plurality of locations. For example, in FIGS. 7 and 8, when the movable cover member 41D is moved to the right and the overlapping width of the pair of movable cover members 41C and 41D becomes the maximum, the large back plate protrusion of the movable cover member 41D When the cushion material 66, 67 of the movable cover member 41C hits 61a, a buffering and silencing effect is produced.

  As shown in FIG. 4, a bent portion 41 d is provided in front of the lower end portion 41 b of the telescopic cover 41 so that the cover members 41 </ b> A to 41 </ b> F are bent in contact with each other. By adopting the structure of the bent portion 41d, the adhesion between the cover members 41A to 41F at the sliding contact portion is enhanced.

  This lathe is given a movement in the feed direction and the cutting direction of the tool 10 with respect to the workpiece (not shown) supported by the spindle 5 by the back-and-forth movement of the headstock 6 and the left-right movement of the tool rest 7. Turning is performed. As the tool post 7 moves left and right, the pair of left and right telescopic covers 41 expands and contracts in the width direction. When one telescopic cover 41 is expanded, the other telescopic cover 41 is contracted. When the telescopic cover 41 expands and contracts, the movable cover members 41 </ b> B to 41 </ b> F move to the left and right along the upper and lower rails 42 and 43. When the rolling member 52 is guided to freely roll by the rolling guide portions 51B to 51F of the guide grooves 50B to 50F of the upper rail 42, the upper ends of the movable cover members 41B to 41F are smooth with respect to the upper rail 42. Move to. Further, the slider 60 is slidably in contact with the lower rail 43, so that the lower ends of the movable cover members 41 </ b> B to 41 </ b> F move smoothly with respect to the lower rail 42.

  Chips and cutting fluid generated in the machining area S1 during the turning process fall on the chip conveyor 32 through the chip discharge space 8, and are carried by the chip conveyor 32 and discharged to the outside. Since the tool holder mounting surface 12c of the slide member 12 and the intermediate portion 41c of the telescopic cover 41 are inclined surfaces positioned closer to the main shaft 5, the chips and the cutting fluid fall downward along the inclined surface. To do. For this reason, chips and cutting fluid do not stay on the slide member 12 and the telescopic cover 41, and the adverse effect on the processing does not occur.

  Since the telescopic cover 41 is suspended with the upper ends of the cover members 41 </ b> A to 41 </ b> F inserted into the upper rail 42, there is no gap between the telescopic cover 41 and the upper rail 42. Further, the upper rail 42 is attached to the covering member 44 without a gap. Therefore, chips and cutting fluid in the machining area S1 do not enter the movement mechanism area S2 from between the telescopic cover 41 and the cover member 44, and the movement mechanism 18 of the tool post 7 is always kept in a good state. Be drunk.

  Since the upper rail 42 has a configuration in which a plurality of plate members 54, 55, and 56 are overlapped in the front-rear direction, it is advantageous to manufacture and assemble the upper rail 42. Specifically, there are the following advantages. It is easy to form the interval between the guide grooves 50A to 50F into which the upper ends of the cover members 41A to 41F are inserted to a required dimension. The rolling guide portions 51 </ b> B to 51 </ b> F can be easily processed by performing press processing or the like on the pair of guide groove constituting plate materials 54 with two sheets. The rolling member 52 may be a ball, and the rolling member 52 may be fitted into the through holes 53 of the movable cover members 41B to 41F. If the rolling member 52 is a ball, the rolling member 52 can be easily processed and manufactured at low cost. The upper rail 42 can be assembled simply by fixing the plate members 54, 55, 56 to the covering member rear hanging portion 44 c by the fixing tool 45. The rolling member 52 does not need to be assembled in advance with respect to the cover members 41B to 41F.

  In the above embodiment, the rolling member 52 is a ball, but is not limited thereto. For example, as shown in FIG. 10, the rolling member 52 may be a roller, and the rolling member 52 made of this roller may be rolled along the rolling guide portion 51 of the upper rail 42. In some cases, as shown in FIG. 11, a sliding member 70 made of a material having a low sliding resistance such as a resin is provided instead of the rolling member, and the sliding member 70 is provided on the rail 42. You may make it slide along the moving guide part 71. FIG.

  In the above-described embodiment, the partition member is the plate-like cover member 44 that covers the upper end portion of the telescopic cover 41. However, the partition member is not limited to this, and may be any member that partitions the two regions together with the telescopic cover 41. For example, the partition member may be disposed at a position perpendicular to the width direction with respect to the telescopic cover 41. Further, the partition member may be a frame constituting the airframe.

  Furthermore, in the said embodiment, although the process part 3 was one machine tool, this invention is applicable also to a machine tool with a some process part. It can also be applied to machine tools other than lathes.

It is a fracture side view of a lathe provided with a telescopic cover device according to an embodiment of the present invention. It is a top view of the same lathe. It is a front view of the lathe. (A) is a front view of the telescopic cover device of the lathe, and (B) is a side view thereof. It is a perspective view of the telescopic cover device. It is VI-VI sectional drawing of FIG. 4 (A). It is VII-VII sectional drawing of FIG. 4 (A). It is an enlarged view of the VIII part of FIG. It is IX arrow line view of FIG. It is a side view of the principal part of the telescopic cover apparatus concerning different embodiment. Furthermore, it is a side view of the principal part of the telescopic cover apparatus concerning another embodiment. (A) is a front view of a conventional telescopic cover device, and (B) is a side view thereof.

Explanation of symbols

3 ... Machining part 5 ... Spindle (Machining equipment)
7 ... Tool post (processing equipment)
40 ... telescopic cover device 41 ... telescopic cover 41a ... telescopic cover upper end portion 41b ... telescopic cover lower end portion 41c ... telescopic cover intermediate portion 41A ... fixed cover members 41B to 41F ... movable cover member 42 ... upper rail 43 ... lower rail 44 ... cover Member (partition member)
50B-50F ... Guide grooves 51B-50F ... Rolling guide 52 ... Rolling member S1 ... Processing area (first area)
S2 ... Movement mechanism area (second area)

Claims (3)

An upper rail and a lower rail that are parallel to each other along the horizontal direction, one end in the width direction is fixed to the upper rail and the lower rail, and the other end in the width direction is movable along the upper rail and the lower rail. A telescopic cover that partitions the first region and the second region, and a partition member that partitions the first region and the second region together with the telescopic cover;
The telescopic cover is composed of a plurality of cover members that are aligned with each other in a state of being partially overlapped with each other, and the cover member at one end in the width direction is fixed to the upper rail and the lower rail. A cover member, the other cover member is a movable cover member movable in the width direction with respect to the upper rail and the lower rail,
The telescopic cover device has a structure in which the upper rail is disposed in contact with the partition member, and an upper end portion of the movable cover member is suspended from the upper rail so as to be movable in the width direction.   The said upper rail has a guide groove along the width direction of the said telescopic cover, The rolling member which is guided to this guide groove and can roll freely was provided in the upper end part of each said movable cover member. Telescopic cover device.   The upper rail and the lower rail are located at positions separated from each other in a direction perpendicular to the width direction of the telescopic cover, and the upper and lower ends of the telescopic cover are directed in the vertical direction, and the intermediate portion is inclined. The telescopic cover device according to claim 1 or 2.

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