KR20070026223A - Machine tool - Google Patents

Abstract

A machine tool is provided to prevent a cooling fluid inside a receipt portion from leaking out from a base by lessening a force of the cooling fluid passing through a labyrinthine path even in a case of the cooling fluid to enter into labyrinth sealing portion strongly. In a machine tool, a machine main body is installed on a base(2). A splash cover(3) covers an upper part of the base and a portion or the whole of the machine main body with being fixed to the upper part of the base. The splash cover comprises a front wall(3a), a right wall(3b), a left wall, a ceiling wall(3d), a right ground wall protruded from the upper part of the base toward a right inclination direction, and a left ground wall(3f) protruded from the upper part of the vase to a left inclination direction. A labyrinth sealing unit is installed between a ground part of a sunken receipt unit and a lower part of the splash cover. A control box(9) including a control device to control an operation of a machining center(1) is placed on a rear part of the splash cover. A leg unit(2a) is formed on lower four edge parts of the base capable of adjusting a height thereof.

Description

Machine tool {MACHINE TOOL}

1 is a perspective view of a machining center 1.

2 is a right side view of the machining center 1.

FIG. 3 is a cross-sectional view along the arrow A-A in FIG. 2; FIG.

4 is a perspective view of the base 2 (without the right trough member 70 and the left trough member 80).

5 is a perspective view of the base 2 (the right trough member 70 and the left trough member 80 are present).

6 is a perspective view of the right trough member 70.

7 is a perspective view of the connecting member 90.

Fig. 8 is a cross sectional view of the upper right periphery of the base 2, showing the configuration of the labyrinth seal 60 in the vicinity of the peripheral plate 22 on the right side of the base 2;

Fig. 9 is a longitudinal sectional view of the upper front side periphery of the base 2 showing the configuration of the labyrinth sealing portion 60 in the vicinity of the peripheral plate 22 on the front side of the base 2;

Fig. 10 is a cross sectional view of the upper right periphery of the base 2 showing the configuration of the labyrinth seal 160 as a first modification.

Fig. 11 is a cross sectional view of the upper right periphery of the base 2 showing the configuration of the labyrinth sealing portion 260 as the second modification.

<Explanation of symbols for the main parts of the drawings>

1: Machining Center

2: Base

3, 31: splash cover

5: column

8: table

9: control box

10, 14: opening

11: opening and closing door

20: storage

50: moving object

60: labyrinth seal

70: right gutter member

80: left trough member

[Document 1] Japanese Unexamined Patent Publication No. 2002-205542

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a machine tool, and more particularly, to a machine tool having a cover which prevents coolant or chips from scattering from the base to the surroundings.

BACKGROUND OF THE INVENTION Machining centers, which are a type of machine tool, have a machine body for machining a work with a cutting tool on a base to be a base, and have a splash cover for covering part or all of the machine body on the base. This splash cover prevents the table or upper surface of the base, chips or coolant from the machine body from scattering around the outside.

It is common for a machining center having such a splash cover to have a concave accommodating portion at the top of the base, and to screw the lower end of the splash cover directly to the bottom surface of the accommodating portion. However, with this structure alone, a gap is formed between the bottom face of the base housing portion and the bottom end of the splash cover, and there is a fear that the coolant leaks outward from the gap.

Thus, for example, a machine tool having a configuration in which a space portion is formed between the lower portion of the splash cover and the peripheral plate of the housing portion, and a rubber packing is pressed into the space portion to prevent leakage of coolant or the like from the outside of the splash cover. Is already known. In addition, in the machine tool described in Japanese Patent Laid-Open No. 2002-205542, an opening portion is provided in the housing portion on the base, the side surrounding the machine tool, and between the bottom surface of the housing portion and the bottom of the splash cover in the opening portion. I place a packing preventing it. In this machine tool, since the packing can be attached or detached from the inside of the splash cover, the attachment and detachment operation of the packing can be facilitated. Since the packing is hidden inside the splash cover, the aesthetics can also be improved.

However, in this machine tool, a packing is used to prevent a gap between the bottom surface of the base housing portion and the lower portion of the splash cover, and the packing is often made of rubber or sponge, and thus has poor durability. Therefore, there is a problem that the replacement of the packing at a certain time is required, and the detachable work accompanying the replacement of the packing is cumbersome. Since the packing is pressed and fixed from the top with sheet metal so as not to escape from the opening, there is a problem that chips are caught in bolts and nuts for fixing the sheet metal, and chips are deposited from there.

An object of the present invention is to provide a machine tool which can prevent the coolant dropped on the base from leaking out of the base and can prevent the chip from being deposited on the base.

In order to achieve the above object, the machine tool according to claim 1 includes a base, a machine body for processing a work provided on the base, and a part or all of the upper part of the base and the machine body while being fixed on the base. A machine tool having a cover formed in a box shape, the upper portion of the base having a concave receiving portion for receiving and supporting the lower portion of the cover inside, between the bottom of the receiving portion and the lower portion of the cover It has a labyrinth seal.

According to the machine tool of Claim 1, even if the coolant which fell to the accommodating part penetrates into the labyrinth sealing part prematurely, the momentum of the coolant can be weakened while passing through this labyrinth | path | path. Thereby, it can prevent that the cooling liquid in an accommodating part leaks out of a base. Since the conventional packing is not used, there are no fasteners or obstacles such as screws or nuts for fixing the sheet metal pressing the packing in the labyrinth sealing portion. Thereby, even if a chip is contained in a cooling liquid, a chip | tip does not get caught by an obstacle etc. in a labyrinth sealing part.

In the machine tool of Claim 2, the board member extended upward from the bottom part of the said accommodating part along the side wall of the said base is provided, and the labyrinth sealing part is comprised by the lower part of the said cover and the said plate member.

In the machine tool according to claim 2, the labyrinth seal can be easily configured in the lower portion of the plate member and the cover simply by providing a plate member extending upward from the bottom of the housing portion along the sidewall of the base.

In the machine tool according to Claims 3 and 4, a concave discharge passage for discharging the chip and the coolant formed in the bottom portion of the storage portion of the base out of the storage portion, and the discharge passage provided inside the discharge passage. A concave trough member extending along the passage and having a width length shorter than the width length of the discharge passage, the bottom wall and a pair of side walls standing up from both ends in the width direction of the bottom wall; The said board member is comprised by the outer side wall located in the outer side of the said accommodating part among the said pair of side walls of the said trough member.

In the machine tool according to Claims 3 and 4, the plate member constituting the labyrinth sealing portion can be easily configured as the outer sidewall of the trough member by arranging the trough member having a width length shorter than the discharge passage inside the discharge passage. By allowing the coolant to flow inside the trough member, the coolant can be discharged out of the base by flowing into the discharge passage even if the coolant overflows from the trough member. Since the width length of the trough member is shorter than the width length of the discharge passage, a gap is formed between the trough member and the discharge passage, and even if the coolant flowing inside the trough member overflows from the trough member, the coolant can flow from the gap into the discharge passage. .

The machine tool according to claim 5 has a bifurcated portion formed in the lower portion of the cover in a bifurcated shape, and the plate member is sandwiched by the bifurcated portion.

In the machine tool according to claim 5, the bifurcation formed in the lower part of the cover can be extended so that the labyrinth sealing part composed of the plate member and the lower part of the cover can be extended by disposing the plate member. Thus, the momentum of the coolant flow entering the labyrinth seal can be weakened further.

The machine tool which concerns on Claim 6 and 7 is equipped with the support which supports the table for fixing the said workpiece | work to the said bottom part of the said accommodating part, and the upper end part of the inner side wall facing the said outer side wall contact | connects the said support stand.

In the machine tool according to Claims 6 and 7, since the upper end of the inner side wall facing the outer side wall of the trough member is in contact with the support, the coolant falling from the table supported by the support can flow into the trough member. Since the trough member is disposed to be biased toward the support side of the discharge passage, a gap can be formed between the outer side wall of the trough member and the inner surface of the discharge passage. Thereby, even if the coolant passes over the outer side wall of the trough member, the coolant can flow in the gap with the discharge passage and flow into the discharge passage.

Hereinafter, the machining center 1 which is one Embodiment of this invention is demonstrated based on drawing.

4 and 5, the upper left inclined side is the front of the base 2, the lower right inclined side is the rear of the base 2, the lower left inclined side is the right side of the base 2, and the right inclined upper side is shown. To the left of the base 2. In Fig. 6, the left inclined upper side is made front of the right trough member 70, the right inclined lower side is made rear of the right trough member 70, and the left inclined lower side is made right of the right trough member 70, The right inclined upper side is made into the left side of the right trough member 70. In the following description, the X-axis direction of the machining center 1 indicates the left and right directions of the machining center 1, and the Y-axis direction indicates the front-rear direction (depth direction) of the machining center 1. In addition, Z-axis direction shall show the up-down direction of the machining center 1.

As illustrated in FIG. 4, the machining center 1 according to the present embodiment is disposed between the bottom portion 21 of the concave storage portion 20 provided on the base 2 and the lower portion of the splash cover 3. The features of the present invention reside in that a labyrinth labyrinth seal 60 (see Fig. 3) is provided.

First, a schematic configuration of the machining center 1 will be described. In the machining center 1 shown in Fig. 1, a workpiece (not shown) and a tool move relative to each other, thereby performing desired machining (for example, "boring", "milling", "punching", "cutting", etc.) on the workpiece. Machine tool to carry out. The machining center 1 comprises an iron base 2 which is to be expected, a machine body for processing a work provided on an upper portion of the base 2, a machine body fixed to an upper portion of the base 2, and The box-shaped splash cover 3 covering the upper portion of the base 2 is mainly composed of the configuration. The machining center 1 is provided with a control box 9 incorporating a control device (not shown) for controlling the operation of the machining center 1 behind the splash cover 3. The splash cover 3 shown in FIG. 1 corresponds to "cover".

As shown in Figs. 1 and 2, the base 2 is molded by introducing a metal material such as cast iron into the mold, and has a shape of a substantially rectangular parallelepiped that is long in the Y-axis direction. The core part is so-called thickness reduction molding (frame structure by ribs) for weight reduction, high strength and low cost. The base 2 is provided with the leg part 2a which height adjustment is possible in four lower corners, respectively. By providing these four leg parts 2a in the floor surface of a factory, etc., the machining center 1 is provided in a predetermined place. The base 2 is provided with a pair of column seat parts 4 and 4 (only one is shown in FIG. 2) spaced apart from each other in both corner portions on the upper rear side. The column sheet portions 4 and 4 are large sheets having a substantially rectangular parallelepiped shape. The lower part of the columnar column 5 extended in the Z-axis direction is being fixed on the pair of column sheet part 44. As shown in FIG.

As shown in Fig. 3, the base 2 has a concave accommodating portion 20 (see Fig. 4) composed of a bottom portion 21 and a peripheral plate 22 thereon, and the accommodating portion 20 thereof. The lower part of the splash cover 3 is accommodated in the inside. The machining center 1 has a labyrinth labyrinth seal 60 which is a feature of the invention between the bottom of the splash cover 3 and the bottom 21 of the housing 20 of the base 2. have. Thereby, the cooling liquid which flows in the accommodating part 20 of the base 2 can be prevented from leaking out of the base 2 over the periphery plate 22 of the base 2. The upper structure of this base 2 and the structure of the labyrinth sealing part 60 are mentioned later.

The splash cover 3 is inclined to the right side from the front wall 3a, the right wall 3b, the left wall 3c, the ceiling wall 3d, and the base 2 as shown in Figs. Right bottom wall 3e protruding from the bottom, left bottom wall 3f protruding to the left inclined side from the base 2 upper side, right back wall 3g protruding to the right from the front surface of the column 5, column ( It consists of several sheet metals, such as the left back wall 3h etc. which protruded to the left side from the front surface of 5), and has a box shape. As shown in Fig. 1, the front wall 3a has a vertically long rectangular opening 10 at its center, and the opening 10 is provided with a slide open / close door 11. The opening part 10 is opened by sliding the handle part 11a of this opening / closing door 11 to the left side, and attachment and detachment of the workpiece | work held on the table 8 (refer FIG. 3) mentioned later can be performed. The front wall 3a is equipped with the operation panel 12 on the right side of the opening / closing door 11 for inputting setting of parameters, such as a machining program of the machining center 1 and a machining program.

As shown in Figs. 1 and 2, the right side wall 3b has a rectangular opening 14, and the opening 14 is provided with a lid-shaped inspection hatch 15 detachably fixed. By removing the splash guard side cover 15 and opening the opening 14, the work of attaching and detaching the work on the table 8 and the repair work of the various devices constituting the machine body housed inside the splash cover 3 can be performed. It is possible. Although not shown, the left side wall 3c also has the same opening part as the right side wall 3b, and the splash guard side cover which closes the said opening part.

The ceiling wall 3d of the splash cover 3 may be a spindle head (not shown), wiring to the spindle head (not shown), or a motor (not shown) of the tool changer 6 (see FIG. 3). It is provided with the opening (not shown) which protrudes. As shown in Figs. 1 and 2, box covers 17 and 18 respectively cover the openings. The front wall 3a of the splash cover 3 is provided with the tower type warning notification lamp 16 for notifying an operator of the error concerning the operation of the machining center 1 in the upper left corner.

As shown in FIG. 3, the splash cover 3 accommodates the machine main body which cuts a workpiece | work inside. The main body of the machine is a columnar column 5 fixed on a column seat portion 4, 4 (see Fig. 2) installed at the upper rear of the base 2 and fixed thereto, and the base of the column 5 ( A spindle head (not shown) movable in the Z-axis direction held on the front surface side opposite to the upper part of 2), a rotatable spindle 7 held below the spindle head, and the spindle 7 The tool changer (ATC) 6 which automatically replaces the tool mounted in the main body is made into the main part of a structure. The storage part 20 of the upper part of the base 2 is equipped with the table 8 which can fix a workpiece | work detachably, and is movable in an XY-axis direction.

Here, the table 8 will be described. The table 8 shown in FIG. 3 is located on the below-described table support 24 (refer to FIG. 4) provided inside the accommodating part 20 of the base 2, and the inside of the accommodating part 20 is XY. It can move in the axial direction (horizontal plane). Specifically, the table 8 is provided with a movable body 50 at the lower side thereof, and the movable body 50 has a pair of X-axis conveying guide rails (not shown) extending along the X-axis direction at the upper portion thereof. Doing. Then, the table 8 moves on the pair of X-axis feed guide rails by an X-axis moving mechanism having a ball screw shaft, a nut, an X motor (not shown), and the like. The movable body 50 can move on the pair of Y-axis conveyance guide rails 30 and 30 which extend in the accommodating part 20 of the base 2 along the Y-axis direction. Specifically, the pair of Y-axis feed guide rails 30 and 30 is moved by the movable body 50 by the Y-axis moving mechanism having the same ball screw shaft, nut, and Y motor (not shown) as the X-axis moving mechanism. Move the phase. As a result, the table 8 can move in the XY axis direction.

As shown in Fig. 3, the X-axis conveying guide rail has a table 8 in the center and is provided with a pair of expansion and contraction covers 52 and 53 on the left and right sides of the upper and lower sides, respectively. The Y-axis feed guides 30 and 30 are also stretchable covers 54 disposed on the front side of the table 8 on the upper side thereof, and sheet metal formed in a roughly cross-sectional shape, and before the table 8 and the column 5. Y-axis rear cover (not shown) arrange | positioned between the side sides is provided, respectively. Therefore, even if the table 8 moves to any direction (limited to the XY axis direction which comprises a horizontal plane), these various covers cover the X-axis feed guide rail and Y-axis feed guide rail 30,30. Therefore, it is possible to prevent chips from being deposited on the X-axis feed guide rails and the Y-axis feed guide rails 30 and 30.

Next, the upper structure of the base 2 is demonstrated in detail. As shown in Fig. 4, the base 2 has an accommodating portion 20 integrally formed in a concave shape in which an upper surface thereof is opened. This storage part 20 is provided with the bottom part 21 which is substantially rectangular in planar view extended in a Y-axis direction, and the periphery board 22 which stood up surrounding the periphery of the said bottom part 21, and was installed. The bottom portion 21 is gently inclined downward from the front of the base 2 to the rear. The peripheral plate 22 has a shape in which the rear side of the base 2 is open and the lower side of the base 2 is substantially rectangular when viewed in a long plane in the Y-axis direction. Therefore, the coolant which has scattered the inside of the splash cover 3 and dropped into the storage portion 20 flows along the inclined surface of the bottom portion 21 and flows out of the base 2 from the rear of the base 2. The peripheral plate 22 shown in Fig. 4 corresponds to the "side wall of the base".

Next, each member provided in the peripheral plate 22 will be described. As shown in Fig. 4, the upper end of the peripheral plate 22 on the front side of the base 2 is provided with a pair of plate-shaped fixing plates 40 and 40 having a predetermined thickness fixed at predetermined intervals. The pair of fixing plates 40, 40 are provided with fixing holes 40a communicating with a screw hole (not shown) which penetrates the peripheral plate 22 in the vertical direction. Each upper end portion of the peripheral plate 22 on the left and right sides of the base 2 is provided with a pair of plate-shaped support plates 42 and 42 having a predetermined thickness fixed at predetermined intervals.

These fixing plates 40 and supporting plates 42 are used when fixing the splash cover 3 on the base 2. As shown in Figs. 1 and 9, the fixing plate 40 is brought into contact with the bracket 58 provided at the lower end of the front wall 3a of the splash cover 3 and fixed with a screw 68. On the support plate 42, as shown in Figs. 2 and 8, the cross-section L which will be described later, which is provided on the outer surface near the lower end of the right bottom wall 3e (left bottom wall 3f) of the splash cover 3, will be described later. One member of the female support member 112 is in contact. Thereby, the lower part of the splash cover 3 is supported on the support plate 42 of the peripheral plate 22. In this way, the splash cover 3 is provided on the base 2.

Next, the structure of each member provided in the bottom part 21 is demonstrated. As shown in Fig. 4, the substantially central portion located between the left and right sides of the bottom portion 21 is a substantially rectangular parallelepiped table support 24 for supporting the table 8 substantially horizontally in the accommodating portion 20. It is provided, and is integrally formed with the bottom part 21, and is comprised. The table support 24 is a pair of right support walls 26 and left support walls 28, each of which is installed in a substantially rectangular parallelepiped support main body 25 and vertically arranged from both left and right ends of the support main body 25, respectively. And a cross section orthogonal to the longitudinal direction has a substantially concave shape. The front face, the right face and the left face of the table support 24, the concave passage formed by the bottom portion 21 and the circumferential plate 22 are formed so as to allow the coolant to flow out of the base 2. Passage ”.

Next, the structure which the table support 24 has is demonstrated. First, the structure which the support main body 25 has is demonstrated. As shown in Fig. 4, the support main body 25 is provided with a pair of support blocks 47 and 47 on the rear side of the upper surface. The support blocks 47 and 47 rotatably support one end of a ball screw shaft (not shown) of the Y-axis moving mechanism, and fix a Y motor (not shown) for rotating the ball screw shaft. The support main body 25 is provided with the pair of support blocks 48 and 48 for rotatably supporting the other end of the said ball screw shaft in the upper surface front side. By supporting the various members constituting the Y-axis movement mechanism by the support blocks 47 and 48, the Y-axis movement mechanism is lower than the upper ends of the pair of right support walls 26 and left support walls 28, respectively. Place it.

Next, the structure of the right support wall 26 and the left support wall 28 is demonstrated. As shown in Fig. 4, each upper end of the right support wall 26 and the left support wall 28 is a band-shaped guide rail in plan view for installing the Y-axis transfer guide rail 30 (see Fig. 3). The mounting surfaces 27 and 29 are provided, respectively. Each corner portion of the inner side of the guide rail mounting surfaces 27 and 29 (inside of the table support 24) has a convex shoulder 27a and 29a projecting upward to position the Y-axis feed guide rail 30. Are respectively provided. Thereby, a pair of Y-axis feed guide rails 30 are provided in the direction from the inner side of the table support 24 to the outer side with respect to the guide rail installation surfaces 27 and 29, and is provided in each shoulder 27a and 29a. Contact by positioning.

The bottom part 21 is equipped with the substantially Y-shaped sheet part support part 32 in the front view formed in the state which raised back perpendicularly from the top of the bottom part 21 in the back of the table support 24. As shown in FIG. The seat portion supporter 32 is provided with a pair of substantially rectangular parallelepiped column seat portions 4 and 4 spaced apart from each other as a large sheet for loading and fixing the lower portion of the column 5 on both the left and right sides of the upper portion thereof. . A trapezoidal horizontal plate 34 is connected between the lower portion of the column sheet portions 4 and 4 and the upper end portion of the peripheral plate 22 in plan view. The lower side of each of the horizontal plates 34 is a coolant passage 35 formed in a tunnel shape for discharging the coolant dropped in the housing 20 from both sides of the seat supporter 32 toward the rear of the base 2. )to be. The three reinforcing ribs 45 formed in a substantially triangular shape between the upper surface of the horizontal plate 34 and the outer surface of the column sheet portion 4 in contact with the upper surface of the horizontal plate 34 are predetermined. Lined up at intervals.

The seat support 32 has an inclined portion 37 which is gently inclined downwardly from the upper rear of the table support 24 to the rear of the base 2 between the pair of column seat portions 4 and 4. Doing. As a result, the coolant dropped on the upper surface of the support main body 25 flows along the inclined portion 37 to flow out of the rear of the base 2.

As shown in Fig. 5, the bottom portion 21 of the housing portion 20 having the above structure includes a pair of right trough members 70 which are substantially L-shaped when viewed in a plane forming a concave trough of a cross section, and The left trough member 80 is laid. The pair of right trough members 70 and the left trough members 80 are laid so that the front side and the left and right sides of the table support 24 are embedded. The right trough member 70 and the left trough member 80 flow a cooling liquid to the inside to guide the rear of the base 2 and constitute a part of the labyrinth seal 60 which is a feature of the present invention.

Next, the structures of the right trough member 70 and the left trough member 80 will be described. The pair of right trough member 70 and the left trough member 80 shown in FIG. 5 are made of sheet metal having smooth sides. As shown in FIG. 6, the right trough member 70 extends in the Y-axis direction in parallel with a transverse portion 72 extending in the X-axis direction and one end in the longitudinal direction of the transverse portion 72. It consists of the longitudinal portion 73, and has the shape which is substantially L-shaped in the whole view. Similarly, the left trough member 80 also extends in the Y-axis direction from the transverse portion 82 extending in the X-axis direction and one end in the longitudinal direction of the transverse portion 82 as shown in FIG. It consists of a longitudinal portion 83, the whole has a shape that is approximately L-shaped in plan view. Since the right gutter member 70 and the left gutter member 80 have a symmetrical shape with most of their structures, the right gutter member 70 will be described in detail with reference to the right gutter member 70, and the left gutter member 80 will be briefly described. . The right trough member 70 and the left trough member 80 shown in FIG. 5 correspond to "concave trough member".

First, the transverse direction portion 72 will be described. As shown in Fig. 6, the transverse direction portion 72 has a horizontal main body 72a that is a horizontally long rectangular shape in plan view, and at one end in a direction orthogonal to the longitudinal direction of the horizontal main body 72a. A side wall portion 72b formed by folding a predetermined width of one end portion at a substantially right angle is provided. The horizontal main body 72a is provided with the rectangular connection part 72c by planar view for connecting the longitudinal one end to the longitudinal one end of the transverse part 82 of the left trough member 80 at the one end in the longitudinal direction. The connecting portion 72c includes two fixing holes (not shown) facing the fixing holes 85 and 85 provided at one end of the transverse portion 82 of the left trough member 80. Thereby, after overlapping the one end of the transverse part 82 of the left trough member 80 to the upper surface of the connection part 72c, the screw 66 is communicated and fitted in each fixing hole, and a nut (not shown) is carried out. By fixing, the right trough member 70 and the left trough member 80 are connected to each other.

Next, the longitudinal section 73 will be described. As shown in Fig. 6, the longitudinal portion 73 has a vertical longitudinal body 73a that is vertically long in plan view, and the longitudinal body 73a is a connection portion 72c of the transverse portion 72. As shown in Figs. It is connected orthogonally to the other end opposite to the one end of the side. The rear end side opposite to the front end portion connected to the transverse portion 72 of the longitudinal body 73a is narrowed in width, and the coolant passages 35 provided on the left and right sides of the seat portion support 32 of the base 2 are provided. It has a shape that can be inserted into the inside (see Fig. 4).

The outer one end (one end on the opposite side to the transverse part 72 side) in the direction orthogonal to the longitudinal direction of the longitudinal main body 73a is a side wall part which is formed by folding the predetermined width of the outer one end part upward at approximately right angles. 73b is provided. The vertical main body 73a has a substantially triangular side wall portion 73c as viewed from the side which gradually rises from the front end side to the rear end side of the vertical main body 73a fixed to the outer side surface of the side wall portion 73b. The side wall portion 73c has an L-shaped cutout 76 near the rear end slightly more than the middle portion thereof, and the height of the sidewall portion 73c from the cutout 76 to the rear end is greater than that of the base 2. It is equal to the height of the inner side of the coolant passage 35.

The inner one end portion (one end portion on the side of the transverse portion 72) in the direction orthogonal to the longitudinal direction of the longitudinal body 73a includes a side wall portion 73d formed by folding a predetermined width of the inner one end portion at approximately right angles. Doing. The vertical body 73a is provided with the contact side wall part 73e fixed to the part from the front end side of the said side wall part 73d to the middle part of the outer side surface of the side wall part 73d. The contact side wall portion 73e stands up at a substantially right angle with respect to the surface of the longitudinal main body 73a, and the upper end portion thereof is bent toward the outside of the longitudinal portion 73.

The rear end of the side wall portion 73d has a fixing wall 73f slightly higher than the side wall portion 73d on the outer side surface. The fixing wall 73f is a longitudinal direction of the connecting member 90 that connects the fixing wall 73f with the fixing wall 83f (see FIG. 5) at the rear end of the longitudinal portion 83 of the left trough member 80. It is for fixing one end. The fixing wall 73f has a fixing hole 77 for fixing the connecting member 90 near the rear end portion. The side wall portion 73c and the contact side wall portion 73e shown in FIG. 6 correspond to the "pair of side walls", the side wall portion 73c corresponds to the "outer side wall", and the contact side wall portion 73e corresponds to the " Inner side wall ”.

The width length of the horizontal main body 72a of the transverse direction 72 is shorter than the width length of the discharge passage which sandwiches the peripheral plate 22 of the front side of the base 2, and the front surface of the table support 24. As a result, as shown in Fig. 9, a predetermined gap is generated between the side wall portion 72b of the lateral portion 72 and the peripheral plate 22, and the labyrinth sealing portion (to be described later) using the predetermined gap ( 60) can be installed. Since the horizontal portion 72 is spaced apart from the peripheral plate 22, it is possible to prevent the coolant flowing in the horizontal portion 72 from leaking into the peripheral plate 22.

The width and length of the longitudinal body 73a of the longitudinal section 73 are also discharged so as to sandwich the peripheral plate 22 on the right side of the base 2 and the outer surface of the right support wall 26 of the table support 24. It is shorter than the width of the passage. As a result, as shown in Fig. 8, a predetermined gap is generated between the side wall portion 73c of the longitudinal portion 73 and the peripheral plate 22, and the labyrinth sealing portion (to be described later using the predetermined gap) ( 60) can be installed. Since the longitudinal portion 73 is spaced apart from the peripheral plate 22, it is possible to prevent the coolant flowing in the longitudinal portion 73 from leaking into the peripheral plate 22.

Next, the arrangement method on the base 2 of the right trough member 70 and the left trough member 80 which consists of the said structure is demonstrated. As shown in Fig. 5, first, the open side of the concave right trough member 70 is faced upward, so as to cover the right half of the bottom 21 of the housing portion 20 of the base 2. The right trough member 70 is arranged. At this time, the rear end of the longitudinal portion 73 of the right trough member 70 is inserted into the tunnel coolant passage 35 (see Fig. 4) behind the base 2 and disposed. Subsequently, the left trough member 80 is disposed so that the open side of the left trough member 80 faces upward, and the left half of the bottom 21 of the housing portion 20 of the base 2 is covered. . The rear end of the longitudinal portion 83 of the left trough member 80 is similarly inserted into the coolant passage 35 (see FIG. 4) of the base 2 and disposed.

As shown in Fig. 6, one end portion of the transverse portion 82 of the left trough member 80 that faces the transverse portion 72 of the right trough member 70 in the transverse direction of the right trough member 70. It arrange | positions on the upper surface of the connection part 72c of the part 72, and is arrange | positioned. The nut is screwed into the fixing hole 85 of the transverse portion 82 of the left trough member 80 and the fixing hole of the connecting portion 72c of the transverse portion 72 of the right trough member 70. (Not shown). In this way, the lateral direction 72 of the right trough member 70 and the lateral direction 82 of the left trough member 80 are connected to each other.

As shown in Fig. 5, the connecting member 90 of the substantially L-shaped cross section fixed near the rear end of the bottom portion 21 of the base 2 is formed of the longitudinal portion 73 of the right trough member 70. The rear end and the rear end of the longitudinal portion 83 of the left trough member 80 are connected. This connecting member 90 is stretchable, and the bottom of the base 2 is pulled together by pulling the right trough member 70 and the left trough member 80 toward the approximately center table support 24 on the bottom 21. It is for fixing on the part 21.

Here, the connecting member 90 will be described. As shown in Fig. 7, the connecting member 90 is composed of a first connecting member 91 having a substantially L-shaped cross section and a second connecting member 92 having a substantially L-shaped cross section. The second connecting member 92 overlaps the inner side of one end side in the longitudinal direction of the first connecting member 91 and is connected in a slidable state along the longitudinal direction of the first connecting member 91 within a predetermined distance.

First, the first connecting member 91 is a band-shaped main body member 91a in plan view and a side member 91b provided at approximately one end in a direction perpendicular to the longitudinal direction of the main body member 91a. It has a shape of which the cross section is substantially L-shaped. On the other end of the first connection member 91 opposite to one end of the side to which the second connection member 92 connects, a rectangular fixing member perpendicular to the main body member 91a and the side member 91b ( 91c) is connected. The fixing member 91c has an elliptical fixing hole 97 slightly longer in the width direction of the main body member 91a. The main body member 91a is elliptical long in the longitudinal direction of the main-body member 91a lined up in series along the longitudinal direction of the main-body member 91a near the one end part of the side to which the said 2nd connection member 92 connects. Has adjustment holes 95 and 95.

Similarly, the 2nd connection member 92 is also provided with the strip | belt-shaped main-body member 92a in planar view, and the side member 92b provided in the substantially perpendicular part in the one end part of the direction orthogonal to the longitudinal direction of the said main-body member 92a. It has a shape of which the cross section is substantially L-shaped. The other end of the second connecting member 92 opposite to one end of the side connecting to the first connecting member 91 has a rectangular fixing member perpendicular to the main body member 92a and the side member 92b. 92c is connected. The fixing member 92c has an elliptical fixing hole 98 that is slightly longer in the width direction of the body member 92a. The body member 92a has a pair of adjustments corresponding to each other in the pair of adjustment holes 95 and 95 of the first connection member 91 near one end of the side connecting to the first connection member 91, respectively. It has holes 96 and 96. The adjustment holes 96 and 96 have an elliptical shape long in the longitudinal direction of the main body member 92a, and are arranged in series along the longitudinal direction of the main body member 92a.

Next, the fixing method of the connection member 90 which consists of the said structure is demonstrated. First, as shown in FIG. 5, the fixing member 91c (see FIG. 7) of the first connecting member 91 is attached to the fixing wall 83f of the rear end of the longitudinal portion 83 of the left trough member 80. Secure with screws 94 and nuts (not shown). Subsequently, the fixing member 92c (see FIG. 7) of the second connecting member 92 is attached to the fixing wall 73f of the rear end of the longitudinal portion 73 of the right trough member 70 (not shown). Fixed). Moreover, the said other end side of the 2nd connection member 92 overlaps with the said other end side of the 1st connection member 91. FIG. Subsequently, the adjustment holes 95 and 95 on the main body member 91a side and the adjustment holes 96 and 96 on the main body member 92a side are faced to each other.

Next, the first connecting member 91 and the second connecting member 92 are pulled toward the table support 24 side. Thereby, the upper end part of the contact side wall part 73e of the right trough member 70 contacts the outer side surface of the right support wall 26 of the table support 24, and the contact side wall part (of the left trough member 80) The upper end of 83e) contacts the outer surface of the left support wall 28 of the table support 24.

Subsequently, the angles of the first connecting member 91 and the second connecting member 92 with respect to the fixing holes 23 and 23 (see Fig. 4) provided near the rear end of the bottom portion 21 of the base 2 are shown. The adjusting holes 95 and 96 are overlapped to face each other. By fitting the screws 99 to these adjustment holes 95 and 96 and the fixing holes 23, respectively, the first connection member 91 and the second connection member 92 are connected in a straight line, and the bottom of the base The connecting member 90 is fixed to the portion 21.

In this way, the first connecting member 91 and the second connecting member 92 are fixed to the bottom portion 21 of the base 2 while pulling to the center of the table support 24 side. As a result, there is no gap between the upper end portion of the contact side wall portion 73e of the right trough member 70 and the outer surface of the right support wall 26 of the table support 24. Similarly, there is no gap between the upper end of the contact side wall portion 83e of the left trough member 80 and the outer surface of the left support wall 28 of the table support 24. The contact side wall portion 73e of the right trough member 70 and the contact side wall portion 73e of the left trough member 80 are both outer sides of the right support wall 26 and the left support wall 28 of the table support 24. It is in a state covering each side.

By such a structure, most of the coolant which scatters and falls from the upper part of the table 8 is not the discharge passage in the accommodating portion 20 on the base 2, but rather the right trough member 70 and the left trough member 80. It can flow inward. As described above, since the base 2 is integrally formed by introducing the cast iron into the mold, its surface is rough, and chips contained in the coolant are easily caught. However, in the machining center 1 of this embodiment, most of the cooling liquid can flow to the right gutter member 70 and the left gutter member 80 having a smooth surface rather than the discharge passage on the base 2. As a result, since chips are not caught on the inner surfaces of the right trough member 70 and the left trough member 80, the dischargeability of the coolant and the chip can be improved.

Next, the structure of the labyrinth sealing part 60 which is a characteristic of this invention is demonstrated. The labyrinth sealing part 60 shown in FIG. 3 is a maze-type passage provided in order to prevent leakage of cooling liquid. This labyrinth sealing part 60 exists in the vicinity of the peripheral plate 22 of the left and right sides of the base 2, and the vicinity of the peripheral plate 22 of the front side of the base 2, respectively. Therefore, in the following description, the labyrinth sealing part 60 of the left and right sides of the base 2, and the labyrinth sealing part 60 of the front side of the base 2 are demonstrated in order, respectively.

First, the structure of the labyrinth sealing part 60 comprised in the left and right both sides of the base 2 is demonstrated. Since the labyrinth sealing part 60 of the right side of the base 2 and the labyrinth sealing part 60 of the left side of the base 2 are mutually symmetrical structure, it is located in the vicinity of the peripheral plate 22 of the right side of the base 2. The labyrinth sealing part 60 provided is demonstrated as an example.

As shown in Fig. 8, the right bottom wall 3e of the flash cover 3 is obliquely downward from the lower end of the right wall 3b (see Fig. 3) toward the inside of the receiving portion 20 of the base 2. Extends, and the lower end portion of the right bottom wall 3e is slightly spaced apart from the inner side surface of the peripheral plate 22 of the housing portion 20. The right bottom wall 3e extends vertically downward from the lower end thereof, and is provided with a band-shaped extending installation member 100 when the distal end thereof is viewed from the side facing the inside of the right trough member 70. The extension mounting member 100 is located slightly inside of the side wall portion 73c of the right trough member 70.

The obliquely inclined right bottom wall 3e is provided with the 2nd extending installation member 110 which is a horizontally long rectangle from the side to the outer side surface slightly upper side than a lower end part. The 2nd extended installation member 110 is bending the predetermined width along the longitudinal direction, the upper one member is being fixed to the outer side surface of the right bottom wall 3e, and the other lower member is the It extends toward the clearance gap between the inner surface and the outer surface of the side wall portion 73c of the right trough member 70. As shown in FIG. 2 or FIG. 8, the 2nd extension installation member 110 is being fixed by the support member 112 of substantially L shape in cross section in two places of the front end part and the rear end part vicinity of the said other member. When the support member 112 installs the splash cover 3 on the upper portion of the base 2, the support member 112 may have one base extending substantially horizontally from an outer surface of the second extended installation member 110 of the support member 112. It is made to contact the upper surface of each support plate 42 fixed to the upper end part of the periphery plate 22 of 2) (refer FIG. 2).

In the above configuration, the side wall portion 73c of the right trough member 70 has a pair of first extended mounting members 100 and a second extended mounting member each extending downward from the bottom of the right bottom wall 3e. Located in the gap between 110). Therefore, the passage comprised by the 1st extended installation member 100, the outer side surface of the right bottom wall 3e, the side wall part 73c of the right trough member 70, and the 2nd extended installation member 110 is Since it becomes a maze type, the labyrinth sealing part 60 can be comprised. The 1st extended installation member 100 and the 2nd extended installation member 110 shown in FIG. 8 correspond to a "double part."

This labyrinth sealing part 60 is interposed between the inside of the right trough member 70 and the clearance gap between the upper end part of the periphery plate 22 and the outer side surface of the right bottom wall 3e. Thereby, even if coolant flows through the inside of the right trough member 70 favorably, it passes through the side wall part 73c of the right trough member 70, and touches the wall surface which comprises this labyrinth sealing part 60, and the force of the coolant Can be weakened. Therefore, it is possible to prevent the coolant from leaking out of the base 2 beyond the upper end of the peripheral plate 22.

Next, the structure of the labyrinth sealing part 60 provided in the base 2 front side is demonstrated. As shown in Fig. 9, the lower end portion of the front wall 3a of the splash cover 3 is stored behind the peripheral plate 22 on the front side of the base 2. The front wall 3a is fixed to a blanket 58 having a substantially L-shaped cross section extending from the vicinity of the lower end of the outer side to the vicinity of the lower end. One member extending substantially horizontally from the front wall 3a of the bracket 58 contacts each fixing plate 40 fixed to the upper end of the peripheral plate 22 on the front side of the base 2, and the bracket 58 ) And a screw 68 fitted into the fixing hole 40a (see FIG. 4) of the fixing plate 40.

The lower end part of the front wall 3a is equipped with the 1st extension installation member 120 of the substantially L-shaped cross section extended along a lower end part. The first extension mounting member 120 is composed of a fixed portion 120a and an extension mounting portion 120b, and has a shape having a substantially L-shaped cross section. The fixing part 120a is being fixed to the lower end part of the front wall 3a, and the extension installation part 120b is extended vertically downward (the accommodating part 20 of the base 2). The distal end portion (lower end portion) of the extension mounting portion 120b is spaced slightly rearward from the inner side surface of the side wall portion 72b of the right trough member 70. The second extension installation member 121 extends downwardly from the outer surface of the first extension installation member 120a and extends along the longitudinal direction of the lower end of the front wall 3a in the first extension installation member 120a. Is fixed.

In the above configuration, the side wall portion 72b of the right trough member 70 and the extension mounting portion 120b of the pair of first extension mounting members 120 extending downward from the lower end of the front wall 3a, respectively. And a gap between the second extending installation members 121. Therefore, it is formed by the extension installation part 120b of the 1st extension installation member 120 of cross-sectional substantially L shape, the side wall part 72b of the right trough member 70, and the 2nd extension installation member 121. As shown in FIG. The passage becomes a labyrinth type, and the labyrinth sealing part 60 can be comprised.

The labyrinth seal 60 is interposed between the inside of the right trough member 70 and the gap between the inner surface of the peripheral plate 22 and the outer surface of the front wall 3a. Therefore, even if coolant flows through the inside of the right trough member 70 rapidly, for example, it hits the wall surface which comprises this labyrinth sealing part 60, even if it passed through the side wall part 72b of the right trough member 70, The momentum of the coolant can be weakened. Therefore, it is possible to prevent the coolant from leaking out of the base 2 over the top of the peripheral plate 22.

As explained above, the machining center 1 of this embodiment is a maze type between the bottom part 21 of the concave accommodating part 20 provided on the base 2, and the lower part of the splash cover 3. As shown in FIG. The present invention is characterized in that the labyrinth sealing unit 60 is provided. For example, even if the coolant flows in the discharge passage provided in the inside of the accommodating portion 20 of the base 2, the force of the coolant can be weakened by the labyrinth sealing part 60. Therefore, it is possible to prevent the coolant in the accommodating part 20 from leaking out of the base via the peripheral plate 22 of the base 2.

The machining center 1 of this embodiment is equipped with the right trough member 70 and the left trough member 80 in the bottom part 21 of the accommodating part 20 of the base 2, respectively. As a result, most of the cooling liquid scattered and dropped from the table 8 flows to the inside of the right trough member 70 and the left trough member 80 instead of the discharge passage in the accommodating portion 20 to be discharged to the outside. Can be. In addition, since the inner surfaces of the right trough member 70 and the left trough member 80 are smooth, chips are not caught on these inner surfaces, so that the dischargeability of the coolant and the chip can be further improved.

The labyrinth sealing part 60 can be easily comprised by using each side wall part of these right trough member 70 and the left trough member 80. As shown in FIG. For example, the side wall portion 73c of the right trough member 70 extending upward from the bottom 21 side of the storage portion 20, the outer surface of the right bottom wall 3e, and the right bottom wall ( It can be comprised easily by the 1st extension installation member 100 and the 2nd extension installation member 110 which respectively extend toward the bottom part 21 side of the accommodating part 20 from the outer side surface of 3e).

Thus, the gap between the bottom part 21 of the accommodating part 20 and the lower part of the splash cover 3 was not closed by the conventional packing, but the labyrinth labyrinth sealing part 60 was provided. Thereby, in the labyrinth sealing part 60, the obstacle and protrusion which a chip | tip hangs do not exist. Therefore, it is possible to prevent the chip from being deposited in the gap between the bottom portion 21 of the housing portion 20 and the lower portion of the splash cover 3. In addition, since the sheet metal for fixing the packing and the screws and nuts for fixing the sheet are not used, the installation work is not troublesome and the cost for these parts can be saved.

The machine tool of this invention is not limited to the said embodiment, Of course, various deformation | transformation is possible. For example, the arrangement of the components of the labyrinth seal 60 can be changed. In the above embodiment, as shown in Fig. 8, the first extension mounting member 100 provided at the lower end of the right bottom wall 3e and the second extension fixed to the outer side of the vicinity of the lower end of the right bottom wall 3e. The labyrinth sealing part 60 is comprised by arrange | positioning the side wall part 73c of the right trough member 70 between the installation members 110. As shown in FIG.

So, for example, the side wall part 73c of the right trough member 70 is not between the 1st extension installation member 100 and the 2nd extension installation member 110 like the 1st modified example shown in FIG. You may arrange | position the labyrinth sealing part 160 in the inside of the 1st extended installation member 100. FIG. In the labyrinth sealing unit 160, a labyrinth-shaped passage may be formed.

Apart from this, for example, in the housing portion 20 of the base 2 as in the second modification shown in Fig. 11, the base-side extension mounting member 29 stands up from the bottom portion 21 and extends upward. ) May be provided along the peripheral plate 22. The labyrinth sealing part 260 of the maze type can be comprised by pinching the upper end part of this base side extension installation member 29 between the 1st extension installation member 100 and the 2nd extension installation member 110. FIG. In this case, the labyrinth sealing part 260 can be comprised easily by integrally shaping the base side extension installation member 29 with the accommodating part 20 of the base 2.

In the said embodiment, although the 1st extension installation member 100 and the 2nd extension installation member 110 were provided as a "two part", the labyrinth sealing part which abbreviate | omitted the 2nd extension installation member 110 may be sufficient.

The present invention can provide a machine tool which can prevent the coolant dropped on the base from leaking out of the base and can also prevent the chip from being deposited on the base.

Claims (7)

A machine tool having a base, a machine body for processing a work provided on the base, and a box-shaped cover which is fixed on the base and covers a part or all of the upper part of the base and the machine body, A concave accommodating part accommodating and supporting a lower part of the cover in an upper part of the base, And a labyrinth seal between the bottom of the housing and the bottom of the cover. The plate member according to claim 1, further comprising a plate member extending upward from a bottom portion of the housing portion along a side wall of the base, A machine tool comprising a labyrinth seal with a lower portion of the cover and the plate member. The concave discharge passage for discharging the chip and the coolant formed in the bottom portion of the accommodating portion of the base out of the accommodating portion; A concave which extends along the discharge passage provided inside the discharge passage and has a width length shorter than the width length of the discharge passage and comprises a bottom wall and a pair of side walls standing up from both ends in the width direction of the bottom wall; With a trough member of the type, The machine tool which comprised the said board member with the outer side wall located in the outer side of the said accommodating part among the said pair of side walls of the said trough member. According to claim 2, Concave discharge passage for discharging the chip and the coolant formed in the bottom portion of the housing of the base out of the housing; A concave which extends along the discharge passage provided inside the discharge passage and has a width length shorter than the width length of the discharge passage and comprises a bottom wall and a pair of side walls standing up from both ends in the width direction of the bottom wall; With a trough member of the type, The machine tool which comprised the said board member with the outer side wall located in the outer side of the said accommodating part among the said pair of side walls of the said trough member. The machine tool according to any one of claims 2 to 4, wherein the lower part of the cover has a bifurcated part, and the plate member is fitted into the bifurcated part. The supporter according to claim 3 or 4, further comprising: a support for supporting a table for fixing the work to the bottom portion of the storage portion; And a top end of the inner sidewall opposite the outer sidewall contacting the support. According to claim 5, Support portion for supporting a table for fixing the work to the bottom portion of the housing portion, And a top end of the inner sidewall opposite the outer sidewall contacting the support.

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