JP2001138173A - Opening door device for splash guard - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enlarge an opening part without enlarging a splash guard by forming the opening part in such a way that it is not protruded out of a splash guard main body when an opening door is closed, and that part of the opening door is protruded outward only when it is opened. SOLUTION: This opening door device 12 is provided with opening doors 13, 14 provided on a main body 15 of a splash guard 10 to be capable of opening/closing in a crossing direction to an opening part for shielding the opening part when they are closed, a rotation center shaft 20 provided on the splash guard main body 15, links 21, 22 provided on the rotation center shaft 20 in such a way that one end parts 25, 26 are rotatable, and motion direction converting means 23, 24 provided between the links 21, 22 and the opening doors 13, 14 to convert motion directions between rotation motion of the links 21, 22 and straight motion of the opening doors 13, 14 in their opening/closing directions, where opening action of one opening door 13 is interlocked with opening action of the other opening door 14 through the links 21, 22 and the motion converting means 23, 24.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an opening / closing door device for opening and closing an opening of a splash guard that covers a processing area of a machine tool such as a machining center.

[0002]

2. Description of the Related Art In a machine tool, a splash guard is provided so as to cover a processing area in order to prevent chips and cutting oil from scattering outside. The splash guard is provided with an opening for performing setup operations such as loading, unloading, attaching / detaching, and replacing a workpiece. This opening is opened and closed by one or a plurality of opening and closing doors, and this opening is closed by the opening and closing door during cutting. When there are a plurality of doors, the opening and closing operation can be smoothly performed by linking the doors with an interlocking mechanism.
As a technology to link multiple open / close doors with an interlocking mechanism,
For example, Japanese Patent Application Laid-Open No. H11-77482 discloses a mechanism for linking a plurality of doors using a link mechanism. Further, Japanese Utility Model Laid-Open No. 62-92142 and Japanese Utility Model Laid-Open No. 5-26244 disclose a mechanism for interlocking a plurality of doors using a pantograph mechanism.

By the way, the larger the opening of the splash guard is, the better the workability is. However, if the opening is made large, the splash guard becomes large and the opening / closing door becomes large. However, it is desirable that the splash guard be small in order to save the installation area of the machine tool. Therefore, if only a part of the opening / closing door projects outward from the splash guard body only when the opening is opened, the opening can be enlarged without increasing the size of the splash guard. Such technology is
Japanese Utility Model Publication No. 7-50130 and Japanese Utility Model Publication No. 5-2965.
No. 8 discloses this.

[0004]

However, Japanese Unexamined Patent Application Publication No. 11-77482, Japanese Utility Model Application Laid-open No. Sho 62-92142, describes the above-mentioned problem.
In the technology described in Japanese Patent Application Laid-Open No. 5-26244 and Japanese Patent Application Laid-Open No. 5-26244, when one end of a link mechanism or a pantograph mechanism is arranged so as not to protrude outward from a splash guard, the structure of each mechanism disclosed in the aforementioned publication In addition, a part of the opening / closing door cannot protrude outward from the splash guard body. On the other hand, if one end of the link mechanism or the pantograph mechanism is always projected outward from the splash guard body, a part of the opening / closing door can be projected outward from the splash guard body when opening the opening. . However, since a part of the link mechanism or the pantograph mechanism always projects outward, there is a problem in safety such that an operator may hit his head when moving around the machine tool. In addition, the actual fairness 7-50
In the technology described in JP-A-130-130 and JP-A-5-29658, no consideration is given to linking a plurality of doors to smoothly open and close.

The present invention has been made in order to solve such a problem. When the door is closed, it does not protrude outward from the splash guard body, and only when it is opened, a part of the door is opened. The opening of the splash guard can be increased without making the splash guard larger by making the splash guard protrude outwards, and the multiple open / close doors can be linked and opened smoothly and smoothly. It is an object of the present invention to provide a splash guard opening / closing door device in which the moving distance and opening / closing speed of the opening / closing door can be easily changed only by changing the length of the link, and the design can be easily changed. Another object of the present invention is to easily and easily automate the opening / closing door, and to perform the opening / closing operation of the opening / closing door quickly, smoothly and safely with a short driving stroke.

[0006]

In order to achieve the above object, a splash guard opening / closing door device according to the present invention provides an opening / closing door device for opening / closing an opening provided in a splash guard covering a machining area of a machine tool. A plurality of openable and closable doors that are provided in the main body of the splash guard so as to be able to open and close in a direction crossing the opening, and can close the opening when closed, and the main body of the splash guard or A turning center axis provided on the fixed side of the machine tool, one or more links having one end pivotally provided on the turning center axis, and a link between the link and the plurality of opening / closing doors. Movement direction conversion means for converting the movement direction between the pivot movement of the link and the linear movement of the opening and closing direction of the opening and closing door. The operation and other opening and closing operation of the door, and in conjunction through the link and the motion conversion means. The opening is formed on the front surface and the upper surface of the splash guard, and can be shielded by a front plate and a ceiling plate of the opening / closing door, and the link and the movement direction changing means are provided on the ceiling plate of the opening / closing door. It is preferable to be arranged on the upper part of.

The opening / closing door comprises at least a first door having a long moving distance and a second door having a short moving distance, and the movement direction changing means is provided on the link or the opening / closing door. An engaging member, and a guide member extending to the opening / closing door or the link in a direction substantially orthogonal to the opening / closing direction and engaging the engaging member movably in the extending direction. The joint member is
It is preferable that a distance from the pivot center axis is provided at a position that is proportional to a moving distance of the plurality of doors. Apart from this, the opening / closing door comprises at least a first door having a long moving distance and a second door having a short moving distance, and the link is capable of turning operation while maintaining a predetermined angle. A plurality of links, wherein the movement direction changing means includes an engaging member provided on the link or the opening / closing door, and extending in a direction substantially orthogonal to the opening / closing direction on the opening / closing door or the link. And a guide member with which the engaging member is movably engaged in the extending direction. The engaging member has a distance from the pivot center axis corresponding to a moving distance of the plurality of opening / closing doors. Preferably, it is provided at a proportional position. Preferably, the opening / closing door includes the first door having a long moving distance and the second door having a short moving distance, wherein the moving distance of the first door and the second door are different.
Is about 2: 1. Further, a driving body is provided so as to be swingable on a fixed side of the machine tool,
By oscillatingly connecting the operating portion of the driving body between the one end and the other end of any one of the links, and by rotating the one link with the driving body, It is preferable that the plurality of opening / closing doors be opened / closed via the link and the movement direction changing means.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. (First Embodiment) FIGS. 1 to 6 show a first embodiment of the present invention. FIG. 1 is a front view of a machine tool provided with a splash guard opening / closing door device, and FIG. FIG. 3 is an enlarged view of a part III in FIG. 1, FIG. 4 is an enlarged view of a part IV in FIG. 2, and FIGS. 5 and 6 are plan views of the door apparatus of FIG. It shows a closed state and an open state, respectively.

As shown in FIGS. 1 to 4, this embodiment shows a case where the machine tool 1 is a vertical machining center. However, other types of machine tools such as a horizontal machining center, a lathe, and a turning center may be used. Good. Machine tool 1
In, the bed 3 is formed in a substantially L-shape with a high rear portion in a side view. A saddle 7 is provided at the rear of the bed 3 so as to be movable in the X-axis direction. Spindle head 2
, The main shaft 5 is rotatably supported. The spindle head 2
The saddle 7 is provided so as to be movable in a Z-axis direction which is a direction parallel to the axis CL of the main shaft 5. The table 4 moves on the bed 3 in the Y-axis direction. The workpiece 8 clamped to the table 4 is cut by a tool 6 attached to the main shaft 5. A direction parallel to the axis CL of the main shaft 5 is defined as a Z axis (vertical axis in FIG. 1), and each axis direction orthogonal to the X axis (horizontal axis in FIG. 1) is defined as an orthogonal coordinate system. , Y axis (the axis in the front-rear direction in FIG. 1). For convenience of explanation, the -Y axis direction and + Y axis direction, the + X axis direction and-
The X-axis direction is the front and rear, right and left of the machine tool 1, respectively.

[0010] A machining area 9 where cutting is performed at the machining position.
Is covered with a splash guard 10 so that chips and cutting oil do not scatter outside. The main body 15 of the splash guard 10 is fixed to a machine main body including the bed 3 of the machine tool 1 and the like. Between the side surfaces on both sides of the spindle head 2 and the inner side surface of the splash guard body 15, covers 16 of a bellows type, a telescopic (telescope) type, a winding type, and the like are provided. That is, even if the spindle head 2 and the saddle 7 move in the X-axis direction,
The cover 16 extends and contracts, for example, and covers the rear of the processing area 9. An opening 11 is provided in the splash guard 10. A plurality of openings 11 (in the present embodiment,
It is opened and closed by a manual opening and closing door device 12 having two opening and closing doors 13 and 14. An operator operates the operation panel 18 in front of the machine tool 1 when operating the machine, and opens and closes the opening and closing doors 13 and 14 during operations such as a setup operation, and carries in the workpiece 8 through the opening 11. , Unloading, clamping to table 4, unclamping, and replacement.
The operation panel 18 is provided with display means (display, CRT, etc.) 18a and input means (keyboard, touch panel, etc.) 18b, so that the operation of the machine tool 1 is enabled.

The plurality of opening / closing doors include a first door 13 having a long moving distance and covering the right side of the opening 11, and a second door 14 having a short moving distance and covering the left side of the opening 11. The first and second doors 13 and 14 are provided on the splash guard main body 15 so as to be capable of opening and closing in a direction crossing the opening 11 so that the opening 11 can be blocked when the door is closed. The second door 14 is located outside the left cover 17 of the splash guard body 15 (that is, the front side), and the first door 13 is located outside the second door 14 (the front side). The left cover 17, the second door 14, and the first door 13 are arranged so as to sequentially overlap each other. The opening 11 is formed on the front surface and the upper surface of the splash guard 10. The opening 11 can be shielded by front plates 32, 33 and ceiling plates 30, 31 of the first and second doors 13, 14. When the first and second doors 13 and 14 are opened, openings 11 having a width W (FIG. 6) are opened on the front and top surfaces of the splash guard 10.

A first guide rail 36 for movably guiding and supporting the first door 13 and a second guide rail for movably guiding and supporting the second door 14 are provided at a lower front portion of the splash guard body 15. 37 are provided extending parallel to each other and to the left and right. First guide rail 36
Is provided outside (front side) of the second guide rail 37. A first lower roller 38 that rolls on a first guide rail 36 is attached to a lower portion of the first door 13. A second lower roller 39 that rolls on a second guide rail 37 is attached to a lower portion of the second door 14. The first and second lower rollers 38 and 39 are arranged in pairs on the left and right, respectively. The central axes of the first and second lower rollers 38 and 39 are in the front-rear direction and in the horizontal direction. First and second guide rails 36 and 37
Supports the loads of the first and second doors 13 and 14, respectively.

Behind the upper portions of the first and second doors 13 and 14, a pair of first and second upper rollers 41 and 42 are rotatably mounted, respectively. The center axes of the first and second upper rollers 41 and 42 are oriented in the vertical direction.
The guide member 4 is provided on the upper part of the splash guard body 15.
3 extend left and right. The guide member 43
It has a first guide groove 44 located at the front and a second guide groove 45 located at the rear. Inside the first and second guide grooves 44 and 45, the first and second upper rollers 4 are provided.
1, 42 are engaged with each other so as to be able to roll. That is, in the first door 13, the first lower roller 38 rolls on the first guide rail 36 and the first upper roller 41 rolls in the first guide groove 44. The first door 13 moves only in the left-right direction in FIG. Similarly, also in the second door 14, the second lower roller 39 rolls on the second guide rail 37 and the second upper roller 4 moves in the second guide groove 45.
2 rolls, the second door 14 moves only in the left-right direction in FIG. Thereby, the first and second doors 1
3 and 14 can move only in the left-right direction in FIG. 1 while being restricted in the up-down direction and the front-back direction.

As shown in FIGS. 5 and 6, a detection target member 50 is fixed to the upper portion of the ceiling plate 30 of the first door 13 and to the central portion on the rear side. The detected member 50 has a detected portion 51 that protrudes rightward and is bent. On the other hand, on the upper part of the splash guard body 15, the first and second doors 1 are located at positions facing the detected member 50.
A closing direction detecting member 52 for confirming that the members 3 and 14 are closed is attached. As the detection member 52, a limit switch, a proximity switch, or the like can be used. When the first and second doors 13 and 14 are closed and the detection member 52 detects that the detection target 51 abuts on the detection lever 53 of the detection member 52 or approaches a predetermined position, the first and second doors are detected. Can be confirmed that the doors 13 and 14 are completely closed. As shown in FIG. 1, the first and second doors 1
Windows 46 and 47 having a transparent plate or a translucent plate are provided in the front plates 32 and 33 of the plates 3 and 14, respectively. The operator can monitor the cutting state of the workpiece 8 in the processing area 9 from the windows 46 and 47 with the first and second doors 13 and 14 closed. First door 13
A handle 40 for manually opening and closing the door is protruded forward from the right end of the front plate 32.

Next, the door device 12 will be described. As shown in FIGS. 1 to 6, the opening and closing door device 12 includes:
First and second doors 13 and 14, a pivot center shaft 20 provided on the splash guard body 15 (or the fixed side of the machine tool 1), and first and second links 21 and 21 as a plurality of links. 22 and first and second movement direction converting means 2
3, 24. First and second links 21 and 2
The second and first and second movement direction changing means 23 and 24 are arranged above the ceiling plates 30 and 31 of the first and second doors 13 and 14 which cover the upper opening 11. Rotating center axis 20
Is located at a substantially middle position in the moving range of the first door 13. That is, the turning center axis 20 is connected to the right end D1 of the opening 11 and the left end D2 of the splash guard body 15.
, And slightly to the left of the center, and is fixed to a predetermined position behind and above the splash guard body 15. The center axis C1 of the turning center axis 20 is oriented in the up-down direction.

The first and second links 21 and 22 are connected to the first and second links, respectively.
One end portions 25 and 26 are provided corresponding to the second doors 13 and 14, respectively, and one end portions 25 and 26 thereof are connected to a connecting member 56 that is provided to be pivotable about the pivot center shaft 20. The first and second links 21 and 22 have predetermined lengths M1 and M2 corresponding to the moving distances L1 and L2 of the first and second doors 13 and 14, respectively. First and second link 2
Reference numerals 1 and 22 are fixed to the connecting member 56 so as to have a predetermined angle θ so as to perform a turning motion while maintaining a predetermined angle θ as indicated by an arrow B about the turning center axis 20. The first and second movement direction changing means 23 and 24 are provided at the other ends 27 and 28 of the first and second links 21 and 22, respectively.
And the first and second doors 13 and 14, respectively, for turning the first and second links 21 and 22 and the linear movement of the first and second doors 13 and 14 in the opening and closing directions. The direction of motion is converted between and. Therefore, the opening and closing operation of one opening and closing door (in the present embodiment, the first door 13) and the opening and closing operation of the other opening and closing door (similarly, the second door 14) are performed by the first and second links 21 and 22. And the first and second movement direction converting means 23 and 24 are interlocked.

A sleeve 55 is supported on the pivot shaft 20 so as to be pivotable about a central axis C 1, and a connecting member 56 is fastened and fixed to the sleeve 55. The connecting member 56 is formed in an L-shaped cross section and has a reinforcing member 57. First and second links 21 and 22 are fastened and fixed to the horizontal upper surface of the connecting member 56 by a fastening member such as a bolt 58. Central axis 21a of first link 21
The center axis 22a of the second link 22 passes through the center axis C1 of the turning center axis 20. The first link 21 and the second link 22 are fixed to each other by fixing the bridging member 59 therebetween. Therefore, the first and second links 21 and 22 are connected to the central axes 21a and 22.
a can maintain a predetermined angle θ. Sleeve 55, connecting member 56, first and second links 21,
The whole 22 and the bridging member 59 are integrally supported by the turning center shaft 20, and freely turn around the center axis C1 as shown by the arrow B. If the strength of the connecting member 56 and the first and second links 21 and 22 is sufficient to maintain the predetermined angle θ, the bridging member 59
May be omitted. Also, the first and second links 21 and 2
2 only, or the links 21 and 22 and the bridging member 5
9 may be integrally formed. Further, the sleeve 55, the connecting member 56, the first and second links 21, 22
May be integrally formed.

A shaft portion is provided near the other end 27 of the first link 21 so that the outer ring of the cam follower 65 as an engaging member is located below. A guide groove 66 as a guide member is formed in the ceiling plate 30 of the first door 13. The guide groove 66 is
The first door 13 extends in a direction (front-back direction) orthogonal to the opening / closing direction (left-right direction) of the first door 13. The outer ring of the cam follower 65 is engaged with the guide groove 66 so as to be movable in the extending direction (front-back direction). The guide groove 66 is formed by fixing a pair of angle members 67 to the ceiling plate 30. The cam follower 65 and the guide groove 66 constitute the first movement direction changing means 23. The predetermined length M1 of the first link 21 is equal to the center axis C1 of the turning center axis 20.
And the center position of the cam follower 65.

In the vicinity of the other end 28 of the second link 22, a cam follower 68 as an engaging member is attached downward. That is, the shaft portion is attached to the second link 22 such that the outer ring of the cam follower 68 is located below. A support member 70 is fixed to the ceiling plate 31 of the second door 14 so that the guide groove 69 serving as a guide member matches the height position of the cam follower 68. The support member 70 is formed in a predetermined shape so as not to hinder the movement of the first door 13, the first link 21, and the first movement direction changing means 23. A pair of parallel angle members 71 are provided on the upper surface of the support member 70.
Extend in the front-rear direction and are fixed horizontally. A guide groove 69 is formed by the pair of angle members 71. The guide groove 69 extends in a direction (front-back direction) orthogonal to the opening / closing direction of the second door 14. Guide groove 69
, The outer ring of the cam follower 68 is movably engaged in the extending direction (front-rear direction). First and second door 1
When the doors 3 and 14 are opened, the ceiling plate 30 of the first door 13 is opened.
Part of the ceiling plate 31 of the second door 14 and the support material 7
It is stored in the space S between 0. Cam follower 68
And the guide groove 69 constitute the second movement direction changing means 24. The predetermined length M2 of the second link 22
Are the center axis C1 of the turning center shaft 20 and the cam follower 68.
Is the distance from the center position. Cam Follower 6
5 and 68 each have an outer ring rotatable with respect to a shaft portion (stud), and can freely roll in the guide grooves 66 and 69, respectively. In addition, the cam follower 6
5 and 68 may be those in which rolling bearings and the like are incorporated in shaft members fixed to the first and second links 21 and 22, respectively. Further, the case where the guide groove 66 is formed by the pair of angle members 67 and the guide groove 69 is formed by the pair of angle members 71 has been described.
An integral member may be attached to each of the members 3 and 14 and guide grooves 66 and 69 as guide members may be formed in the respective integral members.

The ratio of the moving distance L1 of the first door 13 to the moving distance L2 of the second door 14 is approximately 2: 1.
First link 21 provided corresponding to first door 13
The second link 22 provided corresponding to the second door 14 has a predetermined length ratio (that is, M1 to M2). That is, the cam follower 65 and the cam follower 6
8, the distance from the turning center axis 20 (that is, the distance M1 in the cam follower 65 and the distance M2 in the cam follower 68) is proportional to the moving distance L1 of the first door 13 and the moving distance L2 of the second door 14, respectively. It is provided in the position where it does. Therefore, the first and second links 2
If the first and second members 22 pivot between the open and closed states of the doors 13 and 14, the first door 13 will move approximately twice as long as the second door 14.

Next, the machine tool 1 and the opening / closing door device 12
The operation of will be described. When cutting is performed by the machine tool 1, the first and second doors 13 and 14 are closed to cover the opening 11 so that the processing area 9 is completely closed by the splash guard 10 (FIG. 1, FIG. 1). FIG. 5). In this closed state, the spindle 5 is driven to rotate, the saddle 7 and the spindle head 2 are controlled to move in the X-axis direction and the Z-axis direction, respectively, and the table 4 is controlled to move in the Y-axis direction. Thus, the workpiece 6 is cut by the tool 6 while the tool 6 and the workpiece 8 are relatively moved in the three orthogonal axes.

When the cutting of the workpiece 8 is completed, the operator performs setup work such as replacement of the workpiece 8 in the processing area 9 through the opening 11. For this work,
The operator grasps the handle 40 and moves the first door 13 in the opening direction, that is, in the left direction in FIG. Then, the first upper roller 41 provided at the upper part of the first door 13 is rolled and guided in the first guide groove 44 and the first upper roller 41 provided at the lower part of the first door 13 is provided. The lower roller 38 rolls on the first guide rail 36, and moves in the direction in which the first door 13 opens, that is, in the left direction.

When the first door 13 moves in the opening direction,
The first link 21 turns clockwise about the turning center axis 20 via the guide groove 66 of the first door 13 and the cam follower 65. The second link 22 is connected to the first link 21 via the connecting member 56 and the bridging member 59.
, So that it pivots clockwise in the same manner as the first link 21. That is, the linear motion of the first door 13 is converted into a turning motion of the first and second links 21 and 22 and the like. When the second link 22 turns, the second door 14 is moved through the cam follower 68 and the guide groove 69.
The force for moving the door in the opening direction, that is, the left direction is the second door 1.
Hang on 4. Thus, the turning movement of the second link 22 is converted into a linear movement of the second door 14. Then
In the second door 14, a second upper roller 42 provided at an upper portion thereof is rolled and guided by a second guide groove 45, and a second lower portion provided at a lower portion of the second door 14. The roller 39 rolls on the second guide rail 37, and the second door 14 moves in the opening direction, that is, in the left direction. Thus, the second door 14 is connected to the first door 1
3 in the same opening direction in conjunction with the moving operation. The moving distance L2 of the second door 14 is
Is almost half of the moving distance L1 of the first and second doors 1
3, 14 reach the moving end in the opening direction at the same time.

FIG. 6 shows a state where the first and second doors 13 and 14 have reached the moving ends in the opening direction. In this state, as shown in FIG.
Project from the left end D2 of the splash guard body 15 outward by a dimension F to the left. Further, since the first door 13 is also located at the moving end in the left direction, the opening 11 having a wide width W is opened on the front surface and the upper surface of the splash guard 10. Therefore, the splash guard 10
The wide opening 11 can be formed without increasing the size in the left-right direction. The operator performs setup work such as replacement of the workpiece 8 in the machining area 9 through the opening 11, but the workability is good because the width W of the opening 11 is wide. Also, a large opening 11 is provided above the splash guard 10.
Is formed, when the workpiece 8 is heavy, the workpiece 8 is suspended by a workpiece transfer device such as a crane via the opening 11 at the upper portion of the opening, and a setup operation such as workpiece replacement is performed. be able to.

When the opening 11 is closed by the first and second doors 13 and 14 after the setup operation is completed, the operator grasps the handle 40 and closes the first door 13, that is, rightward. Move in the direction. Then, the first door 13 is
The first upper roller 41 and the first lower roller 38 move rightward due to rolling. The linear motion of the first door 13 is converted into a counterclockwise turning motion of the first and second links 21 and 22 via the guide groove 66 and the cam follower 65. The first and second links 21 and 22 are
When turning counterclockwise around the turning center axis 20,
This turning motion is performed by the cam follower 68 and the guide groove 69.
Is converted into a linear motion of the second door 14 through Thereby, the second door 14 also moves in the closing direction, that is, the right direction by the rolling of the second upper roller 42 and the second lower roller 39. Thus, the second door 14
It moves in conjunction with the movement of the first door 13. After the first and second doors 13 and 14 move in conjunction with each other, they reach the moving end in the right direction at the same time as shown in FIG. Then, the detection target member 50 provided on the first door 13 is detected by the detection member 52 provided on the splash guard body 15. The signal from the detection member 52 confirms that the opening 11 has been shielded, and the next workpiece 8
Preparation for starting the cutting process is completed.

As described above, the first and second doors 13 and 14
Does not protrude outward from the splash guard body 15 when it is closed, and only when the first and second doors 13 and 14 are opened, a part of the second door 14 (left end E) is opened. Protruding outward from the splash guard body 15 to the left,
An opening 11 is formed in the splash guard 10.
Thereby, the opening 11 can be enlarged without increasing the size of the splash guard 10 itself. Since the splash guard 10 itself does not increase in size, the machine tool 1
Installation space can be reduced. Since the ratio of the moving distance L1 of the first door 13 to the moving distance L2 of the second door 14 is almost 2: 1, the first and second doors 1
3, 14 can reach the moving end almost at the same time, and can quickly open and close the door. Since a plurality of opening and closing doors are provided, the space of the storage section for the first and second doors 13 and 14 can be reduced, and the opening 11 can be enlarged.

The turning center shaft 20 is mounted at a position inward from the outer peripheral edge of the splash guard body 15.
When the opening 11 is closed, the first and second doors 13 and 14 do not protrude outward from the splash guard body 15. Therefore, during operation of the machine tool 1, these members 20, 13, 14 are safe without being in the way. Further, since the second door 14 also opens and closes in conjunction with the opening and closing operation of the first door 13, the first and second doors 13 and 14 do not collide with each other when moving.
Open and close lightly and smoothly. First and second links 21 and 2
By changing the length of the second and third doors 13 and 14,
The moving distances L1, L2 and the opening / closing speed can be easily changed, and the design can be easily changed. Turning center axis 20, 1st,
Since the second links 21 and 22 and the first and second movement direction changing means 23 and 24 are arranged above the ceiling plates 30 and 31 of the first and second doors 13 and 14, chips The cutting oil and the like do not enter into each operation part, and can smoothly slide at all times, so that troubles can be prevented.

(Second Embodiment) FIG. 7 shows a second embodiment of the present invention.
FIG. 10 is a plan view of the splash guard opening / closing door device 80 according to the embodiment, showing a state during the opening / closing operation. The same or corresponding parts as those in the first embodiment are denoted by the same reference numerals, and the description thereof will be omitted. Only different parts will be described.
As shown in FIG. 7, a cylinder device 81 as a driving body is swingably provided on a fixed side of the machine tool, for example, on the splash guard body 15. A piston rod 82 as an operating part of a cylinder device 81 is swingably connected between one end 25 and the other end 27 of any one link (for example, the first link 21). I have. By rotating the first link 21 with the cylinder device 81, the first and second links 21 and 22 and the first and second movement direction converting means 23 and 24 are used to rotate the first link 21 and the second link 21. The doors 13 and 14 are opened and closed in conjunction with each other.

The cylinder device 81 operates with a pressure fluid such as compressed air or pressure oil. The cylinder device 81
For example, it is connected to a support member 83 fixed to the splash guard body 15 via a connection shaft 84 so as to be swingable in the horizontal direction. A connecting member 85 is fixed to the distal end of the piston rod 82, and the connecting member 85 is connected to the connecting shaft 8.
6 and is swingably connected to the first link 21. The connecting shaft 86 engaged with the first link 21 is disposed at a position close to the turning center shaft 20. Therefore, if the cylinder device 81 is driven by supplying the pressurized fluid to move the piston rod 82 forward or backward, the first and second links 21 and 22 move as shown by the arrow B,
A turning motion is performed about the turning center axis 20.

On the upper surface of the splash guard body 15,
An opening direction detecting member 87 for detecting that the first and second doors 13 and 14 have reached the moving ends in the opening direction is attached. As the detecting member 87, a limit switch, a proximity switch, or the like can be used. First door 1
A detection member 89 protruding rearward is attached to substantially the center of the rear end of the ceiling plate 30 of the third member 3.
9 has a detected part 90. First and second door 1
When the detected portions 90 of the detected member 89 of the first door 13 come into contact with the detection lever 88 of the detection member 87 or approach the predetermined position, It is detected that the first and second doors 13 and 14 have been opened. The operation of the cylinder device 81 is stopped by the signal of the detection member 87, and the first and second doors 13 and 14 are stopped.
Is completely open and stopped. The fact that the first and second doors 13 and 14 are completely closed is confirmed by detecting the detection target member 50 with the detection member 52, and the signal of the detection member 52 detects the cylinder device 81. Stop operation.

Opening / closing door device 8 having cylinder device 81
According to 0, the opening and closing operations of the first and second doors 13 and 14 can be automated. The automatic opening / closing door device 80 can be configured by simply adding the cylinder device 81, the detecting member 87, the detected member 89, and the like to the manual opening / closing door device 12 shown in the first embodiment. Doors can be easily automated with design changes. The drive stroke of the piston rod 82 is short because the connecting shaft 86 is arranged at a position close to the turning center shaft 20. As a result, the size of the cylinder device 81 can be reduced, the moving speed of the first and second doors 13 and 14 can be increased, and the opening and closing operation can be performed in a short time.

The turning center shaft 20 is arranged at a substantially middle position in a moving range of the first door 13 directly driven by the cylinder device 81. Therefore, the moving speed of the first door 13 is low near the left and right moving ends (that is, near the closed state and the open state), and is high at the intermediate position between the left and right moving ends (the state shown in FIG. 7). can do. Thereby, the first and second doors 13 and 1 can be driven with a short drive stroke.
4 can be smoothly and safely performed at high speed. Note that the second embodiment has the same operation and effect as the first embodiment.

(Third Embodiment) FIG. 8 shows a third embodiment of the present invention.
In the top view of the splash guard opening / closing door device 100 according to the embodiment, the opening / closing doors 13 and 14 are in a fully closed state. The same or corresponding parts as those in the first and second embodiments are denoted by the same reference numerals, and the description thereof will be omitted. Only different parts will be described. As shown in FIG. 8, in the third embodiment, one link 121 is connected to the movement direction converting means 12.
3, 124 are provided. The link 121 has a cam follower 165 as an engagement member at a position of a predetermined distance M1.
However, a cam follower 168 as another engaging member is attached to a position at a predetermined distance M2. That is, the cam follower 165 and the cam follower 168 are separated from the turning center axis 20 (that is, the cam follower 165).
The distance M1 of the first door 13 and the distance M2 of the cam follower 168 are different from the distance L1 (FIG. 5)
Are provided at positions proportional to the moving distance L2 of the door 14 (FIG. 5).

Therefore, the link 121 is connected to the door 13,
If the turning operation is performed between the open state and the closed state of the first door 14, the first door 13 will move approximately twice as long as the second door 14. The cam follower 165 is the first opening / closing door 1
3 can be rolled in a guide groove 66 formed on the ceiling plate 30. Further, the cam follower 168 can roll in a guide groove 69 formed on the support member 70 of the second opening / closing door 14. Therefore, when the link 121 is turned by the movement of the piston rod 82 by supplying the pressurized fluid to the cylinder device 81, the movement direction changing means 12 on one link 121
The first opening / closing door 13 and the second opening / closing door 14 perform an opening / closing operation in conjunction with each other via 3 and 124. In this embodiment, an example in which the opening and closing operation is performed by the cylinder device 81 has been described. However, the operator may manually perform the opening and closing operation using the handle 40 without providing the cylinder device. In addition,
The third embodiment also has the same operation and effects as the first and second embodiments.

In the above embodiments, the first and second doors 1
Although the case where only a part (left end E) of the second door 14 protrudes outward from the splash guard body 15 when the third door 14 is opened has been described, a part of the first door 13 (the left end E) The end 11) can also be made to protrude in the same manner, so that the opening 11 can be made even larger. In addition, the opening and closing door is 2
Although the number of sheets is shown, three or more sheets may be used. Also,
In the above embodiments, the direction of the guide grooves 66 and 69 is described as a direction (front-back direction) orthogonal to the opening / closing direction (left-right direction), but may be a direction inclined by a predetermined angle. Further, the movement direction changing means in each of the above embodiments has been described using a cam follower (engaging member) provided on the link and a guide groove (guide member) extending on the opening / closing door. Alternatively, a guide groove may be extended to the link, and a cam follower may be provided to the opening and closing door. Alternatively, two cam followers may be provided side by side, and a guide member may be extended instead of the guide groove, and the direction of movement may be changed by sandwiching the guide member between the two cam followers. In the drawings, the same reference numerals indicate the same or corresponding parts.

[0036]

According to the present invention, as described above, the opening / closing door does not protrude outward from the splash guard body when it is closed, and only partially protrudes outward when it is opened. As a result, an opening is formed in the splash guard, the opening can be enlarged without increasing the size of the splash guard, and a plurality of opening and closing doors can be linked and lightly opened and closed smoothly, and the link can be opened. By simply changing the length of the door, the moving distance and the opening / closing speed of the door can be easily changed, and the design can be easily changed. Also,
It is easy to automate the opening and closing door, and the opening and closing operation of the opening and closing door can be performed quickly, smoothly and safely with a short drive stroke.

[Brief description of the drawings]

FIGS. 1 to 6 are views showing a first embodiment of the present invention, and FIG. 1 is a front view of a machine tool having a splash guard opening / closing door device.

FIG. 2 is a sectional view taken along the line II-II of the opening / closing door device of FIG.

FIG. 3 is an enlarged view of a part III in FIG. 1;

FIG. 4 is an enlarged view of a part IV in FIG. 2;

FIG. 5 is a plan view of the opening / closing door device of FIG. 1, showing a closed state.

FIG. 6 is a plan view of the opening / closing door device of FIG. 1, showing an open state.

FIG. 7 is a plan view of an opening / closing door device for a splash guard according to a second embodiment of the present invention, showing a state during an opening / closing operation.

FIG. 8 is a plan view of a splash guard opening / closing door device according to a third embodiment of the present invention, showing a closed state.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Machine tool 9 Processing area 10 Splash guard 11 Opening 12 Opening / closing door apparatus 13 1st door (opening / closing door) 14 2nd door (opening / closing door) 15 Main body of splash guard 20 Revolving center axis 21 1st link (link) 22 second link (link) 23 first motion direction conversion means (motion direction conversion means) 24 second motion direction conversion means (motion direction conversion means) 25, 26 one end 27 the other end 30 , 31 ceiling plate 32, 33 front plate 65, 68 cam follower (engaging member) 66, 69 guide groove (guide member) 80 opening / closing door device 81 cylinder device (drive body) 82 piston rod (operating portion) 100 opening / closing door device 121 Link 123 Motion direction conversion means 124 Motion direction conversion means 165, 168 Cam follower (engaging member) L1, L2 Move Distance θ predetermined angle from the release M1, M2 pivot axis

Claims (6)

[Claims] 1. An opening / closing door device for opening and closing an opening provided in a splash guard covering a processing area of a machine tool, wherein the opening / closing door device is provided in a body of the splash guard so as to be capable of opening and closing in a direction crossing the opening. A plurality of opening / closing doors capable of closing the opening when closed, a pivot center axis provided on the main body of the splash guard or on a fixed side of the machine tool, and one end portion of the pivot center axis A link or links provided rotatably on the link, and a link provided between the link and the plurality of opening / closing doors,
A movement direction converting means for converting a movement direction between a turning movement of the link and a linear movement of the opening and closing direction of the opening and closing door, wherein the opening and closing operation of one opening and closing door and the opening and closing operation of another opening and closing door are provided. A splash guard opening / closing door device, wherein the splash guard is linked via the link and the motion converting means. 2. The opening is formed on a front surface and an upper surface of the splash guard, and can be shielded by a front plate and a ceiling plate of the opening / closing door. The opening / closing door device for a splash guard according to claim 1, wherein the opening / closing door device is arranged above the ceiling plate of a door. 3. The opening / closing door comprises at least a first door having a long moving distance and a second door having a short moving distance, and the movement direction changing means is provided on the link or the opening / closing door. An engaging member, and a guide member extending to the opening / closing door or the link in a direction substantially perpendicular to the opening / closing direction and engaging the engaging member movably in the extending direction. The splash according to claim 1 or 2, wherein the joining member is provided at a position where a distance from the pivot center axis is proportional to a moving distance of each of the plurality of opening / closing doors. Guard opening and closing door device. 4. The door according to claim 1, wherein the opening and closing door comprises at least a first door having a long moving distance and a second door having a short moving distance, and the link is capable of turning while maintaining a predetermined angle. The link comprises a plurality of links, the movement direction changing means includes an engaging member provided on the link or the opening / closing door, and extending in a direction substantially orthogonal to the opening / closing direction on the opening / closing door or the link. And a guide member with which the engaging member is movably engaged in the extending direction. The engaging member has a distance from the pivot center axis corresponding to a moving distance of the plurality of opening / closing doors. 3. The opening / closing door device for a splash guard according to claim 1, wherein the opening / closing door device is provided at a proportional position. 5. The opening / closing door comprises the first door having a long moving distance and the second door having a short moving distance, and the moving distance of the first door and the second door. The opening / closing door device for a splash guard according to claim 3 or 4, wherein a ratio of a moving distance of the splash guard is approximately 2: 1. 6. A driving body is provided on a fixed side of the machine tool so as to be swingable, and an operating part of the driving body is swung between the one end and the other end of any one of the links. The plurality of doors are opened and closed via the link and the movement direction converting means by movably connecting the one link with the driving body. The opening / closing door device for a splash guard according to any one of items 1 to 5.