JP4863137B2 - Shielding device in machine tool - Google Patents

Description

  The present invention is provided in a saddle which is provided with a spindle head and is supported by a column and moves in the X-axis direction. The front side of the column exposed to both sides of the saddle is moved by following the movement of the saddle and is always shielded. The present invention relates to a shielding device for a machine tool.

Conventionally, a portal column fixed to a bed is provided with two upper and lower X-axis rails, and a saddle having a Y-axis rail is supported on the X-axis rail so as to be movable in the X-axis direction. A pair of left and right shields, each of which is individually attached to the left side and the right side of the saddle and covers the front side of the column, in a machine tool that supports a spindle head having a spindle oriented in the direction movably in the Y-axis direction A sheet, a pair of left and right guide rollers provided vertically on both sides of the front part of the column to guide the shielding sheet along the side surface of the column, and arranged on the both sides behind the column with a space in the vertical direction. A plurality of guide pulleys, and a plurality of ropes wound around the guide pulleys, bypassed behind the column, and annularly connected to the other ends of the respective shielding sheets to keep the shielding sheets in tension. The provided, the shielding sheet is moved with movement of the X-axis direction of the saddle, is known shielding device which is adapted to shield the front side at all times the column (e.g., see Patent Document 1).
Japanese Patent No. 2950155

  However, in the shielding device in the conventional machine tool, a plurality of ropes connecting the pair of shielding sheets attached to both sides of the saddle in an annular shape are arranged around the back of the column. When the spindle head supported by the saddle moves in the X and Y axis directions, the spindle motor is attached to the spindle head and protrudes backward through the space inside the column, and power is supplied to the spindle motor. Equipment and equipment such as a terminal box, a rotary joint device that supplies cutting oil and cooling water to the spindle, a cable that connects the terminal box and the power supply unit, and a hose that connects the rotary joint device and the cutting oil supply source unit , Interfering with the rope, in particular, the rope arranged at the center of the column in the height direction. Therefore, in order to avoid the interference, it is necessary to arrange the rope to be largely detoured to the rear of the column, and there is a problem that the required installation space of the machine becomes large, and the equipment and equipment are maintained. In the case of inspection, there is a problem that the rope becomes in the way, it is difficult to access the inspection place, and the work cannot be easily performed.

  The present invention has been made in view of the above circumstances, has a simple structure, can easily perform maintenance and inspection of equipment and equipment mounted on the spindle head, and can also reduce the installation space of the machine. Another object of the present invention is to provide a shielding device in a machine tool that can increase the degree of freedom of arrangement and processing of the equipment and equipment.

In order to solve the above problems, the present invention has the following configuration.
That is, the shielding device in the machine tool according to claim 1 includes a pair of shielding sheets each having one end attached to both sides of a saddle that is supported by a column and moves in the X-axis direction. It is guided along the side of the column by a guide roller provided vertically on the side, and each other end is looped as a tension state by a rope that is wound around guide pulleys provided on both sides of the rear of the column. Is a shielding device in a machine tool that is configured to always follow the space on the front side of the column exposed to both sides of the saddle by moving following the saddle and each of the guide pulleys, A first guide pulley that guides a line extending from the other end of each shielding sheet to the rear of the column toward at least one of the vertical directions; and the line guides And a second guide pulley that is positioned at a height near the end of the column in the specified direction and guides the rope guided by the first guide pulley toward the opposing first guide pulley. It is characterized by being.

  The shielding apparatus for a machine tool according to claim 2 is the shielding apparatus according to claim 1, wherein a plurality of the strips are provided on each shielding sheet at predetermined intervals in the vertical direction, and each of the first guides is provided. The number of pulleys is the same as the number of ropes, with the same spacing in the vertical direction, and the lower ones are arranged with the position shifted to the rear side of the column. Each of the second pulleys is arranged at the height position near the upper end of the column with the same number as the rope being spaced apart in the front-rear direction of the column. The first guide pulley is provided so as to guide each strip vertically guided upward in the horizontal direction.

  A shielding device for a machine tool according to claim 3 is the shielding device according to claim 1, wherein a plurality of the strips are provided on each shielding sheet at predetermined intervals in the vertical direction, and each of the first guides is provided. The number of pulleys is the same as the number of ropes, with the same spacing in the vertical direction, and the higher ones are arranged with the position shifted to the rear side of the column, and the lower part after guiding the ropes in parallel in the horizontal direction The second pulleys are arranged in the height position near the lower end of the column at intervals in the front-rear direction of the column. The first guide pulley is provided so as to guide each of the strips guided vertically downward in the horizontal direction.

The present invention has the following excellent effects.
That is, according to the shielding device in the machine tool according to claim 1, the rope for tensioning the shielding sheet can be guided and moved by the first and second guide rollers while avoiding the space inside the column. Therefore, an operator can easily approach the equipment and equipment mounted on the spindle head moving in the space from the back side of the column, and the maintenance inspection work is obstructed by the cable. It can be done easily and quickly. In addition, since the rope does not need to be largely detoured behind the column in order to avoid interference with the equipment and equipment as in the prior art, the required installation space of the machine can be reduced. The structure is simple, and it is possible to increase the degree of freedom of arrangement and processing of the equipment and equipment with respect to the spindle head.

  According to the shielding device for a machine tool according to claim 2, the inner space portion of the column has its upper end from the lower side without causing a plurality of cords to be interlaced by a plurality of sets of first and second guide pulleys. The shield sheet is perpendicular to the guide rollers provided on both sides of the front part of the column by a plurality of ropes attached at intervals in the vertical direction. Since the contact is made evenly in the direction and is in a tension state, the shielding sheet can move smoothly following the saddle without being offset.

  According to the shielding device for the machine tool according to claim 3, in addition to the same effect as the shielding device for the machine tool according to claim 2, the work for connecting and adjusting the plurality of strands in an endless manner is provided. Can be done safely and easily at a low position behind.

Hereinafter, a shielding device for a machine tool according to an embodiment of the present invention will be described with reference to the accompanying drawings.
1 to 3 show a shielding device 1 in a machine tool according to a first embodiment of the present invention.
The shielding device 1 is attached to a machine tool 2 which is a horizontal machining center, for example.
The machine tool 2 includes a bed 3, a gate-shaped column 4 that is fixedly secured to the rear end of the bed 3 with a bolt, a front side of the upper beam 4 </ b> A of the column 4, and a front surface of the lower beam 4 </ b> B. Guided by X-axis rails 4a and 4b horizontally provided on the sides and moved in the X-axis direction x, and by Y-axis rails (not shown) provided vertically on both sides of the saddle 5 Are guided by a spindle head 6 that moves in the Y-axis direction y and a pair of Z-axis rails (not shown) provided on the bed 3, and are moved in the Z-axis direction z on the front side of the column 4 by a Z-axis drive motor. And a table (not shown).

  The saddle 5 is driven in the X-axis direction x via a ball screw mechanism 7 by an X-axis servomotor (not shown) installed at one lower portion (right side in FIG. 1) on the front side of the column 4. It is like that. The spindle head 6 has a spindle 9 whose axis is oriented in the Z-axis direction z at the center of the spindle head body 6a, and is rotated around the axis by a built-in spindle motor 8 attached to the back of the spindle head body 6a. At the same time, the Y-axis servo motor 10 is driven in the Y-axis direction y via the ball screw mechanism 10a. The spindle head 6 is extended to the hollow portion 4 </ b> C inside the column 4 through the spindle 9 and the spindle motor 8 inserted through the hollow portion 5 a of the saddle 5.

  A rotating joint for supplying cutting oil to a tool mounted on the main shaft 8 through the main shaft 8 and a cooling oil for cooling the main shaft motor through the main shaft 8 are supplied to the rear end portion of the main shaft head 6. A rotary joint 11 such as a rotary joint for supplying pressure oil to an actuator for attaching / detaching a tool to / from the spindle is attached to the rotary joint for supporting the spindle, and a support member 12 fixed above the rear end of the spindle motor 8 is a column. 4 is provided to protrude rearward from the back surface. An electric wire that supplies electric power to the spindle motor 8, a terminal box 12 a 1 for a signal line of a switch or a sensor, and the like are attached to the upper part of the rear end of the support member 12, and the lower part on the rear end side of the support member 12. Are provided with a plurality of pipe relay portions 12b1 connected to the rotary joint portion 11.

  The electric wire of the terminal box 12a1 is an intermediate terminal box attached to the upper upper position behind the column 4D on one side (left side in FIG. 2) of the column 4 by an electric wire cable 13 suspended in a U-shape. After being connected to 12a2, it is in contact with a power supply unit (not shown) installed on the floor. Further, the pipe from the rotary joint portion 11 in the relay portion 12b1 is partly connected to the intermediate relay portion 12b2 attached to the intermediate height position behind the column 4E on the other side of the column 4 (right side in FIG. 2). The remaining portion is connected to the intermediate relay portion 12b3 attached to the support column 4D near the intermediate terminal box 12a2 by the hoses 14a and 14b suspended from the U-shape, respectively, and then supplied with the cutting agent installed on the floor surface. A pipe, a hose are connected to a power source, a cooling oil supply source, a hydraulic oil supply source (not shown), and the like.

Next, the shielding device 1 includes a pair of guide rollers 16, 16 in which a pair of shielding sheets 15, 15 having one ends attached to both sides of the saddle 5 are vertically provided on both sides of the front portion of the column 4. The first and second guide pulleys 17 and 17 are guided along the both side surfaces of the column 4 and the other end portions are provided on both sides of the rear portion of the column 4 (the right side portion in FIG. 3). , 18 and 18 are connected in a ring shape as a tensioned state by a rope 19 wound around.
The guide roller 16 is supported rotatably around a vertical axis by bearing fittings 20a and 20b fixed to the upper end of the column and the upper surface of the bed 3, respectively.

  The first guide pulley 17 is mounted on a side surface of the column 4 by a support shaft 22 provided in a direction (horizontal) perpendicular to the side surface of the column 4 on a bracket 21 fixed to the back surface of the columns 4D and 4E of the column 4. A plurality (three in the illustrated example) are provided at equal intervals in the height direction of the column 4 so as to rotate in a plane along the plane (in a vertical plane). The guide pulleys 17a, 17b, and 17c arranged at the upper, middle, and lower positions are shifted by a predetermined distance so that the lower ones are separated to the rear of the column 4 (supports 4D and 4E). Yes. The number of the second guide pulleys 18 is the same as the number of the first guide pulleys 17, and the support member 23 fixed to the bracket 21 fixed to the upper end of the column 4 is attached to the back surface of the column 4. It is provided to rotate in a plane parallel to (vertical plane).

  That is, in the illustrated example, the three second guide pulleys 18a, 18b, and 18c are directed to the front and rear upright support pieces 23a and 23b in the support member 23 in a direction (horizontal) orthogonal to the rear surface of the column 4. The fixed support shafts 24a, 24b, and 24c are rotatably supported, and are arranged at predetermined intervals in the axial direction thereof (the front-rear direction of the column 4), and near the upper end of the column 4 (the space portion 4C of the column 4). Is positioned at a height higher than the upper end of the upper beam 4 (in the illustrated example, a position slightly higher than the upper beam 4A). In plan view, the center of the guide groove at the diameter position directed to the outer side of the column 4 of the second, guide pulleys 18a, 18b, 18c of the front, middle, and rear portions is the upper and middle positions, respectively. The lower first guide pulleys 17a, 17b, and 17c are arranged so as to substantially coincide with the center of the guide groove at the diameter position directed to the rear of the column 4.

The first guide pulley 17 and the second guide pulley 18 respectively disposed on the left side (the column 4D side in FIG. 2) and the right side (the column 4E side in FIG. 2) of the column 4 are the first guide pulleys 17a. , 17 b, 17 c and the second guide pulleys 18 a, 18 b, 18 c are arranged to be the left and right objects with respect to the column 4.
The front second guide pulley 18a is supported on the back side of the front support piece 23a, the intermediate second guide pulley 18b is supported on the front side of the rear support piece 23b, and the rear second guide pulley 18b. The guide pulley 18c is supported on the rear side of the rear support piece 23b, and the front, intermediate and rear second guide pulleys 18a, 18b and 18c are supported such that the one located on the front side becomes higher. The height is slightly different.

  The strip 19 is composed of a plurality of (three in the illustrated example) wire ropes, and is adjacent to the height direction of the shielding sheets 15 in the vertical direction of the first guide pulleys 17a, 17b, 17c. It is provided to extend horizontally with the same interval as the mutual interval, and the upper ridge 19a is higher than the first guide pulley 17a, while the middle ridge 17b is the middle first. With respect to the guide pulley 17b, the lower ridges 19c are respectively guided to the lower first guide pulley 17c vertically from the lower side after being wound from the lower side. Each of the strips 19a, 19b, 19c is arranged in order from the upper one to the second guide pulley 18a at the front, the second guide pulley 18b at the middle, and the second guide pulley 18c at the rear. After being wound from (outside direction of the column 4), it is extended to the second guide pulley 18 side facing horizontally, and the other end portions opposite to the shielding sheets 15 and 15 are respectively connected to the tension springs 25a. By connecting the turnbuckle 25b and adjusting the spring force of the tension spring 25a by operating the turnbuckle 25b, a certain tension is applied to the shielding sheets 15, 15 and the ropes 19, 19. Yes.

Thereby, a pair of shielding sheet | seats 15 and 15 are connected cyclically | annularly as the tension state so that the column 4 may be surrounded by the strips 19 and 19. FIG.
In the figure, reference numerals 26a and 26b denote Y-axis shielding devices provided above and below the spindle head 6, which are formed by connecting a large number of flat plates made of metal or the like by links or the like. Is moved in accordance with the vertical movement of the spindle head 6 and shields the space in front of the saddle 5 generated at the upper and lower portions of the spindle head 6, which is well known in the art.

Next, the operation of the shielding device 1 having the above configuration will be described.
When cutting the workpiece on the table by the machine tool 2, the ball screw mechanism 10a is driven by the Y-axis servo motor 10 and the spindle head 6 is moved along the Y-axis rail in the Y-axis direction y. When the ball screw mechanism 7 is driven by the X-axis servo motor and the saddle 5 is moved in the X-axis direction x along the X-axis rails 4a and 4b, the spindle head 6 is moved in the X-axis direction x. When the saddle 5 moves in the X-axis direction x, since the shielding sheets 15 and 15 are connected in an annular shape by the ropes 19 and 19, when the saddle 5 moves to one side (right side in FIG. 1), When the shielding sheet 15 attached to one side of the saddle 5 is pulled by the rope 19 through the shielding sheet 15 on the other side, and the saddle 5 moves to the other (left side in FIG. 1), The shielding sheet 15 attached to the other side of the saddle 5 is pulled by the rope 19 through the shielding sheet 15 on one side.

As a result, even if the saddle 5 moves to either the left or right side, the pair of shielding sheets 15, 15 keeps a tension state without relaxing and moves following the saddle 5 to move both sides of the saddle 5. The space on the front side of the column exposed to the surface is always shielded.
In the shielding device 1 having the above-described configuration, a plurality of ropes 19a, 19b, and 19c attached to the shielding sheets 15 and 15 at equal intervals in the upper, middle, and lower directions are the first guide pulleys 17a, 17b, and 17c. Since the shielding sheets 15 and 15 are in tension and contact with the guide rollers 16 and 16 in the orthogonal direction, the shielding sheets 15 and 15 are displaced in the vertical direction and wrinkles are generated. Instead, it follows the saddle 5 and moves smoothly along the front and side surfaces of the column.

  In addition, the ropes 19 are arranged in the order of the first guide pulleys 17a, 17b, and 17c in which the position of the column 4 in the front-rear direction is shifted backward from the upper one in order. The second guide pulleys 18a, which are changed in the vertical direction and extended in parallel, are shifted in the front-rear direction of the column 4 at a height position above the first guide pulleys 17a, 17b, 17c. 18b and 18c are extended in parallel in the horizontal direction toward the opposing second guide pulleys 18a, 18b and 18c, so that the plurality of ropes 19a, 19b and 19c can be smoothly interleaved with each other. The shielding sheet 15, 15 is moved tightly and moved.

In addition, since the strip 19 is arranged such that portions of the plurality of strips 19a, 19b, 19c passing through the back surface of the column 4 extend in the horizontal direction near the upper end of the column 4, so that the saddle Even if the main spindle head 6 moves up and down, left and right within the hollow portion 4C of the column 4 supported by the rotary joint 5, the rotary joint 11 attached to the rear end of the main spindle head 6 as well as the main spindle head 6. There is no risk of contact and interference with equipment such as hoses and electric cables.
Accordingly, the strips 19 are arranged as close as possible to the back side and the top side of the column 4 to reduce the required installation space of the machine, and the operator can reduce the spindle head 6 during maintenance. Thus, the spindle head and the equipment attached thereto can be easily maintained and inspected from the back of the column 4.

  As described above, the shielding device 1 in the machine tool according to the above embodiment includes a pair of spindle heads 6 and one end attached to both sides of the saddle 5 supported by the column 4 and moving in the X-axis direction x. The shielding sheets 15 and 15 are guided along the side surface of the column 4 by guide rollers 16 and 16 provided vertically on both sides of the front portion of the column 4, and the other end portions are connected to the rear portion of the column 4. Are connected in an annular state as a tension state by a rope 19 wound around the first guide pulleys 17 and 17 and the second guide pulleys 18 and 18 provided on both sides of the belt, and move to follow the saddle and move to the saddle. The space on the front side of the column 4 exposed on both sides of the column 4 is always shielded, and the first guide pulleys 17 and 17 are respectively connected to the column from the other ends of the shielding sheets 15 and 15, respectively. The second guide pulleys 18 and 18 are respectively positioned at the height near the upper end of the column 4 so that the first guide pulley 17 is extended. , 17 is guided to the first and second guide pulleys 17, 18 facing each other.

  Therefore, according to the shielding device 1 in the machine tool according to the above-described embodiment, the rope 19 that tensions the shielding sheets 15 and 15 is formed in the space inside the column 4 by the first and second guide rollers 17 and 18. Since it can be guided and moved away from the portion 4C, the operator can easily approach the equipment and equipment mounted on the spindle head 6 moving in the space portion 4C from the back side of the column 4, These maintenance and inspection operations can be performed easily and quickly without being obstructed by the rope 19. In addition, the rope 19 does not need to be largely detoured behind the column 4 in order to avoid interference with the equipment and equipment as in the prior art, so that the required installation space of the machine can be reduced. In addition, the structure is simple, and the degree of freedom of arrangement and processing of the equipment and equipment with respect to the spindle head 6 can be increased.

  Further, according to the shielding device 1, the three strips 19 are provided on the shielding sheets 15, 15 at predetermined intervals in the vertical direction, and the first guide pulleys 17, 17 are provided on the respective ropes. The same number as the number of the strips 19 and 19, with the same interval in the vertical direction, and the lower ones are shifted to the rear side of the column 4 so that the strips 19a, 19b and 19c are parallel to the horizontal direction. Further, the same number of the second pulleys 18 and 18 as the ropes 19 are arranged at adjacent height positions spaced apart in the front-rear direction of the column 4, Since each of the strips 19a, 19b, 19c guided in the vertical direction by the first guide pulleys 17a, 17b, 17c is configured to be guided in the horizontal direction, three sets of first, first 2 guide pulleys 17a, 18a, 17b, 18b The three strips 19a, 19b, and 19c can be arranged neatly so that the space 4C inside the column 4 extends greatly from the bottom to the upper end without crossing the three ropes 19a, 19b, and 19c by 17c and 18c. The three strips 19a, 19b, and 19c on which the sheets 15 and 15 are attached at intervals in the vertical direction are evenly arranged in a direction perpendicular to the guide rollers 16 and 16 provided on both sides of the front portion of the column 4. Since the contact sheet is in a tension state, the shielding sheets 15 and 15 can smoothly move following the saddle 5 without being displaced in the vertical direction.

  Next, FIG. 4 shows the shielding device 1A in the machine tool according to the second embodiment of the present invention. The shielding device 1A in the machine tool according to this embodiment is configured to support the bracket 21 fixed by the shielding device 1 in the machine tool according to the first embodiment on the upper end of the back surface of the columns 4D and 4E of the column 4. The guide pulleys 18a, 18b, 18c of the guide pulleys 18, 18 are supported on the pieces 23a, 23b, and are guided vertically upward from the horizontal direction by the guide pulleys 17a, 17b, 17c of the guide pulleys 17, 17. Whereas the strips 19a, 19b, 19c of the strips 19, 19 are guided in parallel in the horizontal direction on the back of the column 4 near the upper end of the column 4 by the guide pulleys 18a, 18b, 18c. The bracket 21 is fixed to the lower end of the back surface of the column 4 column 4D, 4E, and the guide pulley 18, 8 guide pulleys 18a, 18b, 18c supported by the guide pulleys 17a, 17b, and the guide pulleys 17a, 17b, 17c. 19b and 19c are guided by the guide pulleys 18a, 18b and 18c in the horizontal direction near the lower end of the column 4 in the horizontal direction on the back surface of the column 4.

In other words, the strips 19, 19 that are stretched around the guide pulleys 18, 18 along the back surface of the column 4 are in a lower symmetrical position that is the reverse of the shielding device 1 in the machine tool according to the first embodiment. It is set as the arrangement arranged in. Since other configurations are the same as those of the shielding device 1 in the machine tool according to the first embodiment, the same components are denoted by the same reference numerals, and description thereof will be omitted.
The shielding device 1A in the machine tool according to the second embodiment also has the same actions and effects as the shielding device 1 in the machine tool according to the first embodiment. , 19b, 19c can be connected and adjusted endlessly at a low position behind the column 4 safely and easily.

  In the shielding device 1, 1 </ b> A in the machine tool according to the above-described embodiment, the three ropes 19, 19 attached to the shielding sheets 15, 15 are each three. It is good also as a number more than a book. In that case, of course, the number of sets of the first and second guide pulleys 17 and 18 is changed according to the number of the ropes 19 and 19. Further, as described above, each of the strips 19a, 19b, 19c is provided so as to move horizontally along the outer surface of the column 4, and at a height position near the upper end or the lower end of the column 4. 4 is preferably provided so as to move horizontally in parallel with the back surface of 4, but is not limited to this, and if the ropes 19, 19 can move smoothly, they move in an inclined state, not horizontally or in parallel. It can also be done.

Moreover, although all the strips 19a, 19b, 19c are configured to be guided in the horizontal direction in the vicinity of the upper end portion or the lower end portion of the back surface of the column 4, the present invention is not limited to this, and the respective strips 19a, 19b are arranged. , 19c may be guided horizontally in the vicinity of the upper end portion of the column 4 and the remaining portion in the vicinity of the lower end portion of the column 4.
Further, the height positions of the front, middle, and rear guide pulleys 18a, 18b, and 18c of the guide pulleys 18 and 18 are set slightly different so that the height is higher at the front side, Since the heights of the cords 19a, 19b, 19c of the cords 19, 19 are made different, a space for adjusting the tension of the cords 19, 19 can be provided even when they are close to each other in the front-rear direction. However, the present invention is not limited to this, and the height positions of the guide pulleys 18a, 18b, 18c are set to be the same, and the heights of the cords 19a, 19b, 19c are the same. It may be arranged between the guide pulleys 18 and 18. Further, their heights do not need to be inclined and displaced according to the order of the columns 4 in the front-rear direction.

Moreover, although the wire rope was used as the said rope 19, it can replace with this and a chain, a belt, etc. can be used. In this case, as a matter of course, the pulleys 17 and 18 corresponding to chains, belts and the like are used.
Further, in the X-axis shielding apparatus 1 in the machine tool according to the embodiment, the horizontal machining center has been described as an example of the machine tool to which the present invention is applied. However, the present invention is not limited to this, and the vertical machining center is not limited thereto. It can also be applied to milling machines, grinding machines, and other machine tools.

It is a perspective view which shows the shielding apparatus in the machine tool which concerns on 1st embodiment of this invention. FIG. FIG. 3 is a cross-sectional view of FIG. It is a perspective view which shows the shielding apparatus in the machine tool which concerns on 2nd embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Shielding device 2 Machine tool 3 Bed 4 Column 4a X axis rail 4b Space 5 Saddle 6 Spindle head 8 Spindle motor 15 Shielding sheet 16 Guide rollers 17, 17a, 17b, 17c First guide pulleys 18, 18a, 18b, 18c Second guide pulley 19, 19a, 19b, 19c Line 21 Bracket 22, 24a, 24b, 24c Support shaft 23 Support member

Claims (3)

A pair of shielding sheets having spindle heads supported by the column and moved in the X-axis direction at one end are attached to the side of the column by guide rollers provided vertically on both sides of the front of the column. while being guided along, are connected in a ring form as a tension by wrapping the cord strip each of the other end portion to each other to guide pulleys provided on both sides of the rear of the column, the saddle moves to follow the saddle A shielding device in a machine tool that always shields the space on the front side of the column exposed on both sides of the column,
Each of the guide pulleys includes a first guide pulley that guides a cable extending from the other end of each shielding sheet to the rear of the column toward at least one of the vertical directions, and the cable guides the cable. A second guide pulley that is positioned at a height near the end of the column in the direction that is guided and guides the rope guided by the first guide pulley toward the opposing first guide pulley. A shielding device for a machine tool, characterized by comprising:   A plurality of the strips are provided on each shielding sheet with a predetermined interval in the vertical direction, and each of the first guide pulleys has the same number as the number of the strips, with the same interval in the vertical direction, and a lower one. The second pulleys are arranged so as to be shifted to the rear side of the column so that the ropes are guided in parallel in the horizontal direction and then guided upward. Are arranged at a height position near the upper end of the column with a space in the front-rear direction of the column, and guide each strip vertically guided upward by each first guide pulley in the horizontal direction. The shielding device for a machine tool according to claim 1, wherein the shielding device is provided as described above.   A plurality of the strips are provided on each shielding sheet at a predetermined interval in the vertical direction, and each first guide pulley has the same number of the strips as the number of the strips in the vertical direction, and the upper one. The second pulleys are arranged so as to be shifted to the rear side of the column so that the strips are guided in parallel in the horizontal direction and then vertically guided downward. Are arranged at a height position near the lower end of the column with a space in the front-rear direction of the column, and guide each strip that is vertically guided by each first guide pulley in the horizontal direction. The shielding device for a machine tool according to claim 1, wherein the shielding device is provided.

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