Fluid nozzle

Abstract

A fluid nozzle (20) is formed by laminating a front side plate material (21) having a fluid supply hole (21a), a back side plate material (22) disposed on the back side of the front side plate material (21), and a first intermediate plate material (23) and a second intermediate plate material (24) in which a fluid passage (26) is formed. The fluid passage (26) is formed of: an introduction opening (23a) and a plurality of introduction cutout portions (23b) formed in the first intermediate plate material (23); and a plurality of discharge cutout portions (24a) formed in the second intermediate plate material (24). The plurality of discharge cutout portions (24a) are disposed side by side at intervals along a lower end edge of the second intermediate plate material (24) and are open to the lower end edge side. The introduction opening portion (23a) is formed so as to span the plurality of discharge cutout portions (24a). Each of the introduction cutout portions (23b), as viewed in a plate thickness direction, forms a recessed shape opening toward the introduction opening portion (23a) side and is formed to overlap with a part of each of the discharge cutout portions (24a).

Description

Fluid Nozzle

[0001] The present invention relates to a fluid nozzle that ejects a fluid.

[0002] BACKGROUND ART Fluid nozzles that are mounted on machine tools and the like and that discharge fluid to a predetermined location for the purposes of removing chips generated during machining, cooling frictional heat, and the like have been known.

[0003] For this type of fluid nozzle, various configurations have been proposed to supply the fluid over a wide area. For example, Patent Document 1 discloses a fluid nozzle in which a slit-shaped discharge hole extending horizontally is formed in a coolant storage box, and coolant (an example of a fluid) is discharged from the discharge hole in a curtain-like manner to supply the fluid over a wide area.

[0004] Japanese Patent Application Publication No. 10-156660

[0005] However, the fluid nozzle disclosed in Patent Document 1 requires a large coolant storage box, which limits the installation location.

[0006] Furthermore, because the coolant storage box has slit-shaped discharge holes formed along its entire length, if the flow rate of the coolant (fluid) supplied to the coolant storage box is low, the coolant discharged from the discharge holes cannot be effectively dispersed into a curtain shape. To avoid this problem, it is conceivable to increase the flow rate of the coolant by increasing the size of the pump that supplies the coolant to the coolant storage box. However, this would require a larger pump, which would increase costs.

[0007] The present invention has been made in view of the above circumstances, and has an object to provide a fluid nozzle that is compact and inexpensive and can reliably discharge fluid over a wide range.

[0008] One aspect of the present invention is a fluid nozzle for discharging a fluid, the fluid nozzle being constructed by stacking a plurality of plate materials in a plate thickness direction, the plurality of plate materials including: a front plate material having a fluid supply hole penetrating in the plate thickness direction; a back plate material arranged on the back side of the front plate material; and a first intermediate plate material and a second intermediate plate material arranged in this order from the front side to the back side in the plate thickness direction between the front plate material and the back plate material, the first intermediate plate material having a plurality of discharge notches arranged side by side at intervals from each other along an outer edge thereof and opening toward the outer edge, the first intermediate plate material having an introduction opening formed across the plurality of discharge notches formed in the second intermediate plate material as viewed in the plate thickness direction, the introduction opening material receiving the fluid supplied from the fluid supply hole and guiding it to each of the discharge notches, and a plurality of introduction notches connected to the outer edge of the introduction opening material, the introduction opening material being concave as viewed in the plate thickness direction and opening toward the introduction opening material, and overlapping a portion of each of the plurality of discharge notches, The fluid nozzle includes the introduction opening, the plurality of introduction notches, and the plurality of discharge notches that form the fluid passage.

[0009] According to this fluid nozzle, fluid supplied from a fluid supply port formed in the front plate is first introduced into an inlet opening formed in the first intermediate plate and spreads throughout the inlet opening. Because this inlet opening is formed across multiple discharge notches formed in the second intermediate plate when viewed in the plate thickness direction, fluid supplied into the inlet opening is supplied to each discharge notch and discharged to the outside from the open end of each discharge notch. Here, multiple inlet notches are formed around the outer edge of the inlet opening, each of which is concave and opens toward the inlet opening and overlaps with a portion of each discharge notch. This ensures smooth fluid supply from the inlet opening to each discharge notch and ensures a sufficient discharge flow rate from each discharge notch.

[0010] That is, in a stacked fluid nozzle using stacked plate materials as in the present invention, while the overall nozzle thickness can be reduced to improve space efficiency, the cross-sectional area of ​​the fluid passages inside the nozzle, i.e., the inlet opening and each discharge notch, is narrowed, resulting in poor fluid flow. In particular, when fluid is supplied from the inlet opening to each discharge notch, the flow path area is suddenly narrowed, increasing pipeline resistance and potentially resulting in an insufficient supply of fluid from the inlet opening to each discharge notch. In contrast, in the fluid nozzle of the present invention, the first intermediate plate is formed with multiple inlet notches that overlap with portions of each discharge notch when viewed from the plate thickness direction. This ensures that the cross-sectional area of ​​the flow path when fluid flows from the inlet opening to each discharge notch is increased by one extra plate thickness of the first intermediate plate. This reduces pipeline resistance when fluid flows from the inlet opening to each discharge notch, ensuring a sufficient fluid flow rate.

[0011] It is preferable to adopt a configuration in which the open end of each discharge notch is a flared portion whose dimension in the flow path width direction perpendicular to the plate thickness direction increases from the upstream side to the downstream side in the fluid discharge direction.

[0012] With this configuration, the fluid is discharged in a film shape at the open end of each discharge notch, spreading in the width direction of the flow path along the inner wall surface of the diverging section, thereby ensuring a wider discharge range of the fluid compared to when the fluid is discharged in a line shape from each discharge notch.

[0013] The front plate material, the back plate material, the first intermediate plate material and the second intermediate plate material are arranged vertically, each of the discharge notches is formed to open downward, and the lower end position of each of the introduction notches is at the same height as the upper end position of the flared portion of each of the discharge notches or is located above that upper end position.

[0014] According to this configuration, the lower end of each introduction notch is positioned at the same height as or higher than the upper end of the divergent portion of each discharge notch, so that the fluid introduced into each introduction notch through the introduction opening can be supplied to the portion of each discharge notch above the divergent portion. Therefore, the fluid can be smoothly diverged without separation over the entire area from the upper end to the lower end of the divergent portion. This ensures that the divergent portion has a divergent width.

[0015] A configuration may be adopted in which the portion from the base end of each discharge notch to the divergent portion is a linear portion made up of a linear slit hole.

[0016] With this configuration, the flow velocity of the fluid can be sufficiently increased in the slit-like linear portion before the fluid is introduced into the divergent portion, thereby ensuring a sufficient flow velocity of the fluid flowing into the divergent portion and thereby reliably achieving the widening effect of the fluid in the divergent portion.

[0017] The present invention has been made in consideration of the above-mentioned circumstances, and comprises a fluid nozzle formed by stacking a front plate, a back plate, and a first intermediate plate and a second intermediate plate positioned between the two plates, the second intermediate plate having a plurality of discharge notches formed in the second intermediate plate that are aligned along its outer edge and open to the outer edge, the first intermediate plate having an introduction opening formed across the plurality of discharge notches formed in the second intermediate plate when viewed from the plate thickness direction, and that receives fluid supplied from a fluid supply hole and directs it to each of the discharge notches, and a plurality of introduction notches connected to the outer edges of the introduction opening, that are concave when viewed from the plate thickness direction and that overlap with a portion of each of the plurality of discharge notches. This enables fluid to be reliably discharged over a wide area with a compact and inexpensive configuration.

[0018] 1 is a perspective view showing a schematic configuration of a machine tool equipped with a fluid nozzle according to an embodiment; FIG. 2 is a side view in the direction of arrow A in FIG. 1; FIG. 3 is a side view of the fluid nozzle as viewed from the front side; FIG. 4 is an exploded perspective view of the fluid nozzle; FIG. 5 is a perspective view of the fluid nozzle as viewed from the back side with the back plate member of the fluid nozzle removed; FIG. 6 is an enlarged view of a portion VI in FIG. 5; FIG. 7 is a cross-sectional view taken along line VII-VII in FIG. 3; FIG. 8 is an explanatory view for explaining the flow path of coolant within the fluid nozzle; FIG. 9 is a view equivalent to FIG. 7 showing a comparative example; FIG. 10 is a schematic side view of the fluid nozzle as viewed from the front side, showing an example of another embodiment; FIG. 11 is a view equivalent to FIG. 10 showing another example of the other embodiment.

[0019] Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

[0020] 1 and 2 show a machine tool 1 equipped with a fluid nozzle 20 according to an embodiment. The machine tool 1 is a horizontal machining center and includes a bed 2, a column 3, a spindle head 5, a spindle 6, a table 7, and a protective cover 9, and the fluid nozzle 20 discharges coolant along the protective cover 9 of the machine tool 1, as will be described later (see the two-dot chain lines in FIGS. 1 and 2). Note that FIGS. 1 and 2, which show the entire machine tool 1, only show the main components of the present embodiment.

[0021] The bed 2 is composed of a linear first bed 2a and a linear second bed 2b connected to the first bed 2a so as to be perpendicular to the first bed 2a, and has an overall T-shape in a plan view. The table 7 is disposed on the second bed 2b and is guided by guide rails 8 so as to move forward and backward relative to the first bed 2a, i.e., in the horizontal direction of the arrow Z.

[0022] The column 3 is disposed on the first bed 2a (see FIG. 2) and is guided by guide rails 4 so as to move in the direction of the X-axis indicated by the arrow (the direction perpendicular to the plane of the paper in FIG. 2), which is horizontally perpendicular to the Z-axis. The spindle head 5 rotatably supports a spindle 6, and is held by the column 3 so as to be movable in the Y-axis, which is vertical and perpendicular to the X-axis and Z-axis. Thus, the spindle head 5 moves within the X-axis-Y-axis plane.

[0023] The protective cover 9 is configured by connecting multiple cover bodies 9a (see FIG. 1) by a pantograph mechanism (not shown) provided on the back side of each cover body 9a. The protective cover 9 is attached to a frame-shaped sheet metal frame 15 erected on the first bed 2a, and is positioned so as to separate the base end side portions of the column 3 and spindle head 5 from the machining area (the area above the second bed 2b).

[0024] The fluid nozzle 20 is disposed on the front side of the upper end of the sheet metal frame 15 with a small gap therebetween and extends in the X-axis direction as viewed from the front side of the machine tool 1. The fluid nozzle 20 is inclined at approximately 45° with respect to the vertical direction (Y-axis direction) so that its lower edge is located rearward of its upper edge as viewed in the X-axis direction. The fluid nozzle 20 is fixed to the sheet metal frame 15 with bolts via L-shaped brackets (not shown) provided at both longitudinal ends. The fluid nozzle 20 flows coolant supplied from a coolant supply device 10 (see FIG. 2 ) installed on the rear side of the machine tool 1 downward along the front side of the protective cover 9. This allows foreign matter such as chips adhering to the front side of the protective cover 9 to be washed away by the coolant. After reaching the lower end of the protective cover 9, the coolant flows downward from the upper surface of the second bed 2b and is returned to the coolant tank 11 of the coolant supply device 10 through the return pipe 13. The coolant supply device 10 filters the returned coolant and supplies the filtered coolant again to the fluid nozzle 20 from the supply pipe 14 by power of the coolant pump 12. In this way, the coolant circulates along a series of circulation paths (see arrows in FIG. 2 ) that pass through the coolant supply device 10 and the fluid nozzle 20.

[0025] [Configuration of the Fluid Nozzle] As shown in Fig. 3, the fluid nozzle 20 has a flat rectangular shape in an overall view and is disposed vertically with its thickness direction oriented horizontally (the Z-axis direction in this example). A coolant supply hole 21a (corresponding to a fluid supply hole) is formed on the front side of the fluid nozzle 20. The fluid nozzle 20 is disposed with the coolant supply hole 21a facing the rear side of the machine tool 1 (see Fig. 1). The fluid nozzle 20 is configured to branch the coolant supplied from the coolant supply hole 21a into multiple branches and then discharge them from the lower end surface of the nozzle.

[0026] Specifically, as shown in Fig. 4, the fluid nozzle 20 is configured by stacking four plate materials 21 to 24 in the plate thickness direction. Each of the plate materials 21 to 24 has a rectangular shape when viewed in the plate thickness direction, and is configured from a metal material such as aluminum, and the plate materials are joined together with an adhesive. Note that the plate materials do not necessarily need to be joined together with an adhesive, and may be joined together with bolts, for example.

[0027] The four plate materials 21 to 24 are made up of a front plate material 21, a back plate material 22 arranged on the back side of the front plate material 21, and a first intermediate plate material 23 and a second intermediate plate material 24 arranged between the front plate material 21 and the back plate material 22. The first intermediate plate material 23 and the second intermediate plate material 24 are arranged in this order from the front side to the back side of the fluid nozzle 20.

[0028] The front plate 21 has the coolant supply hole 21a in the longitudinal center. The coolant supply hole 21a is a circular hole into which the threaded pipe joint 25 is screwed. The pipe joint 25 is connected to the supply pipe 14, and coolant from the coolant supply device 10 is supplied to the coolant supply hole 21a via the supply pipe 14.

[0029] The first and second intermediate plate members 23, 24 are formed with fluid passages 26 through which the coolant supplied from the coolant supply holes 21a flows.

[0030] The fluid passage 26 is composed of an inlet opening 23 a and a plurality of inlet notches 23 b formed in the first intermediate plate 23 , and a plurality of outlet notches 24 a formed in the second intermediate plate 24 .

[0031] As shown in FIGS. 4 and 5 , the multiple discharge notches 24a are spaced apart from one another along the lower edge of the second intermediate plate 24 and are arranged along substantially the entire longitudinal length of the lower edge. Each discharge notch 24a extends vertically (in the longitudinal direction of the second intermediate plate 24 in this example) and is open downward. More specifically, as shown in FIG. 6 , each discharge notch 24a is composed of a slit-shaped linear portion 24b extending vertically and a flared portion 24c connected to the lower end of the linear portion 24b. The flared portion 24c is formed so that its flow path width (the dimension in the flow path width direction perpendicular to the plate thickness direction) increases from top to bottom. In other words, the flared portion 24c is formed so that its flow path width increases from upstream to downstream in the coolant discharge direction. The flow path width at the upper end of the flared portion 24c is equal to the flow path width of the linear portion 24b. The divergence angle θ of the divergent portion 24c as viewed in the thickness direction is set to, for example, 120° or more and 150° or less.

[0032] As shown in Fig. 5, the introduction opening 23a is a rectangular opening formed over the entire longitudinal length of the first intermediate plate 23. When viewed in the plate thickness direction, the introduction opening 23a is formed across the multiple discharge notches 24a. As shown in Figs. 5 and 6, the introduction opening 23a is formed so that its upper edge is located slightly above the upper end position of the linear portion 24b of each discharge notch 24a and its lower edge is located above the lower end position of the linear portion 24b. When viewed in the plate thickness direction, the introduction opening 23a is formed so as to overlap a portion of the upper end side of the linear portion 24b of each discharge notch 24a (in this example, approximately two-thirds of the range from the upper end side of the linear portion 24b).

[0033] As shown in FIG. 4 , the multiple introduction notches 23b are spaced apart from one another along the lower edge of the introduction opening 23a. Each introduction notch 23b is formed in a U-shape (an example of a concave shape) that opens toward the introduction opening 23a (the upper side in this example). As shown in FIG. 6 , each introduction notch 23b is formed to overlap a portion of each discharge notch 24a formed in the second intermediate plate 24 when viewed in the plate thickness direction. More specifically, each introduction notch 23b is formed to overlap the lower end of the linear portion 24b of each discharge notch 24a when viewed in the plate thickness direction. The widthwise ends of each introduction notch 23b coincide with the widthwise ends of each discharge notch 24a when viewed in the plate thickness direction. As shown in FIG. 7 , the lower end of each introduction notch 23b coincides with the upper end of the flared portion 24c of each discharge notch 24a.

[0034] 8 is an explanatory diagram illustrating the coolant flow path in the fluid nozzle 20. As indicated by the solid arrows in the figure, coolant supplied from the front side of the fluid nozzle 20 (the front side of the paper in FIG. 8 ) to the coolant supply hole 21 a spreads out to both sides in the left-right direction in FIG. 8 to fill the space within the introduction opening 23 a formed in the first intermediate plate 23. This spread coolant flows from the introduction opening 23 a into each discharge notch 24 a and is then discharged in the form of a film from the flared portions 24 c at the lower ends of each discharge notch 24 a (see the two-dot chain line in FIG. 8 ).

[0035] Here, when the coolant flows from the inlet opening 23 a into each discharge notch 24 a, the flow path cross-sectional area changes suddenly, increasing pipeline resistance and potentially resulting in an insufficient flow rate of the coolant flowing into each discharge notch 24 a. In contrast, in this embodiment, as described above, the first intermediate plate 23 is provided with multiple inlet notches 23 b that overlap with each discharge notch 24 a when viewed from the plate thickness direction, thereby reducing pipeline resistance.

[0036] The reason why this reduction in piping is possible will be explained based on a comparison with a fluid nozzle 120 of a comparative example shown in Figure 9. The fluid nozzle 120 of the comparative example differs from this embodiment in that it does not have multiple introduction notches 23b, but other configurations are similar to this embodiment. In Figure 9, components that are the same as those of the embodiment are indicated by the reference numerals used in the embodiment plus 100.

[0037] In the fluid nozzle 120 of the comparative example, the lower flow path portion 124d of the discharge notch 124a located below the inlet opening 123a (i.e., the portion of the discharge notch 124a toward which the coolant flows from the inlet opening 123a) only has a flow path thickness tb equivalent to one plate thickness. In contrast, in the fluid nozzle 20 of the present embodiment, as shown in FIG. 7 , the inlet notch 23b formed in the first intermediate plate 23 communicates with the straight portions 24b of the discharge notches 24a in the lower flow path portion 24d, thereby ensuring a flow path thickness ta equivalent to two plate thicknesses. Therefore, compared to the fluid nozzle 120 of the comparative example, the fluid nozzle 20 of the present embodiment can ensure a sufficient flow path thickness when the coolant flows from the inlet opening 23a into the lower flow path portion 24d of the discharge notch 24a, thereby reducing pipeline resistance. This prevents the amount of coolant flowing into the lower flow passage portion 24d of the discharge notch 24a from becoming insufficient, and ultimately makes it possible to reliably discharge the coolant from the lower end of each discharge notch 24a at the desired flow rate and shape.

[0038] In addition, in this embodiment, the open end of each discharge notch 24a is formed as a flared portion 24c whose dimension in the flow path width direction increases from the upstream side to the downstream side in the fluid discharge direction (from the top to the bottom in Figure 6).

[0039] As a result, the coolant that reaches the open end of each discharge notch 24a is discharged in a film shape that spreads across the width of the flow path along the inner wall surface of the flared portion 24c. This allows the coolant to be discharged over a wider range than when the coolant is discharged in a line from each discharge notch 24a (see FIG. 8). This in turn maximizes the cleaning effect of the coolant on the protective cover 9.

[0040] The lower end of each inlet notch 23b is located at the same height as the upper end of the flared portion 24c of each outlet notch 24a (see FIGS. 6 and 7).

[0041] This allows the coolant introduced into each inlet notch 23b through the inlet opening 23a to be supplied to the portion of each discharge notch 24a above the flared portion 24c. This allows the coolant to be smoothly spread across the entire area of ​​the flared portion 24c from the top to the bottom without peeling. This ensures that the coolant spreading effect of the flared portion 24c is achieved.

[0042] The portion from the base end of each discharge notch 24a to the divergent portion 24c is a linear portion 24b consisting of a linear slit hole.

[0043] This allows the coolant to flow at a sufficiently high speed through the slit-like linear portion 24 b before being introduced into the divergent portion 24 c, thereby ensuring a sufficient flow speed of the coolant flowing into the divergent portion 24 c and thereby ensuring the widening effect of the coolant in the divergent portion 24 c.

[0044] Other Embodiments In the above embodiment, the outer edge shape of the fluid nozzle 20 is rectangular, but this is not limited thereto and may be any shape, such as circular or triangular. As an example, Fig. 10 shows an example in which both ends of the lower edge of the fluid nozzle 20 are chamfered to form a non-rectangular shape. Note that in Fig. 10 and Fig. 11 described later, the same components as those in the above embodiment are denoted by the same reference numerals.

[0045] In the above embodiment, the fluid nozzle 20 is inclined at approximately 45° with respect to the vertical direction (Y-axis direction) so that its lower edge is located further rearward than its upper edge when viewed from the X-axis direction, but this is not limited to this. That is, the inclination angle of the fluid nozzle 20 may be greater than or less than 45°. The fluid nozzle 20 may also be positioned horizontally or vertically without being inclined when viewed from the X-axis direction. Furthermore, for example, when supplying coolant to the surface of a workpiece W located within a machining area, the fluid nozzle 20 may be inclined so that its lower edge is located further forward than its upper edge.

[0046] In the above embodiment, each introduction notch 23b formed in the first intermediate plate material 23 is formed in a U-shape that opens toward the introduction opening 23a, but this is not limited to this and may be formed, for example, in a semicircular or triangular shape.

[0047] In the above embodiment, each of the inlet notches 23b formed in the first intermediate plate 23 is formed to overlap a portion of each of the discharge notches 24a that is located below the inlet openings 23a when viewed in the plate thickness direction. However, this is not limited to this. For example, as shown in FIG. 11 , each of the inlet notches 23b may be formed to overlap a portion of each of the discharge notches 24a that is located above the inlet openings 23a. That is, each of the inlet notches 23b may have any configuration as long as it is formed to overlap a portion of each of the discharge notches 24a when viewed in the plate thickness direction. By adopting this configuration, the thickness of the flow path in the plate thickness direction when the coolant flows from the inlet openings 23a to each of the discharge notches 24a can be increased, thereby achieving the same effect as in the above embodiment.

[0048] In the embodiment described above, the discharge notches 24a are formed at intervals from one another along one edge side (lower edge side) of the second intermediate plate 24, but this is not limiting, and for example, the discharge notches 24a may be formed at intervals from one another along the entire edge of the second intermediate plate 24. This makes it possible to discharge fluid from the entire peripheral side surface of the fluid nozzle 20, thereby expanding the range of uses of the fluid nozzle 20.

[0049] In the above embodiment, the lower end of the introduction notch 23b is at the same height as the upper end of the flared portion 24c, but this is not limited thereto and the introduction notch 23b may be located above the upper end of the flared portion 24c, thereby allowing the coolant to be smoothly spread without peeling over the entire area from the upper end to the lower end of the flared portion 24c, as in the above embodiment.

[0050] In the above embodiment, coolant was described as an example of the fluid ejected from the fluid nozzle 20, but this is not limited to this, and the fluid may be other liquids such as water, or gases such as air.

[0051] In the above embodiment, an example has been described in which the fluid nozzle 20 is disposed near the upper end of the sheet metal frame 15 of the machine tool 1, but the present invention is not limited to this and may be provided, for example, in a shutter opening / closing portion of a tool changer provided in the machine tool 1. Furthermore, the fluid nozzle 20 is not limited to being used for cleaning chips and the like, but can also be used for various other purposes, such as blocking dust with a fluid or diffusing gas in an air purifier or air conditioner.

[0052] It should be noted that the above-described embodiments are illustrative in all respects and are not limiting. Those skilled in the art will appreciate appropriate modifications and variations. The scope of the present invention is defined not by the above-described embodiments but by the claims. Furthermore, the scope of the present invention includes modifications from the embodiments within the scope of the claims and their equivalents.

[0053] 20 Fluid nozzle 21 Front plate 21a Coolant supply hole (fluid supply hole) 22 Back plate 23 First intermediate plate 23a Introduction opening (fluid passage) 23b Introduction notch (fluid passage) 24 Second intermediate plate 24a Discharge notch (fluid passage) 24b Straight portion 24c Widened portion 26 Fluid passage

Claims

1. A fluid nozzle that ejects a fluid, The fluid nozzle is configured by stacking a plurality of plate materials in a plate thickness direction, The plurality of plate materials are a front plate member having a fluid supply hole penetrating in the plate thickness direction; a back plate member disposed on the back side of the front plate member; a first intermediate plate and a second intermediate plate that are disposed in this order from the front side to the back side in the plate thickness direction between the front plate and the back plate, and that form a fluid passage; the second intermediate plate has a plurality of discharge notches arranged along an outer edge thereof at intervals and opening toward the outer edge, the first intermediate plate has an introduction opening formed across the plurality of discharge notches formed in the second intermediate plate as viewed in the plate thickness direction, and which receives the fluid supplied from the fluid supply hole and guides it to each of the discharge notches; and a plurality of introduction notches connected to outer edges of the introduction opening, which are concave and open toward the introduction opening as viewed in the plate thickness direction, and which overlap with a portion of each of the plurality of discharge notches, The fluid nozzle is characterized in that the introduction opening, the plurality of introduction notches, and the plurality of discharge notches form the fluid passage.

2. 2. The fluid nozzle according to claim 1, wherein an open end of each of the discharge notches is a diverging portion whose dimension in a flow path width direction perpendicular to the plate thickness direction increases from the upstream side to the downstream side in the fluid discharge direction.

3. the front plate, the back plate, the first intermediate plate, and the second intermediate plate are arranged vertically; Each of the discharge notches is formed to be open downward, 3. The fluid nozzle according to claim 2, wherein the lower end of each of the inlet notches is located at the same height as or higher than the upper end of the divergent portion of each of the outlet notches.

4. 4. The fluid nozzle according to claim 2, wherein the portion from the base end of each of the discharge notches to the divergent portion is a linear portion consisting of a linear slit hole.

5. A machine tool equipped with a fluid nozzle that discharges a fluid, The fluid nozzle is configured by stacking a plurality of plate materials in a plate thickness direction, The plurality of plate materials are a front plate member having a fluid supply hole penetrating in the plate thickness direction; a back plate member disposed on the back side of the front plate member; a first intermediate plate and a second intermediate plate that are disposed in this order from the front side to the back side in the plate thickness direction between the front plate and the back plate, and that form a fluid passage; the second intermediate plate has a plurality of discharge notches arranged along an outer edge thereof at intervals and opening toward the outer edge, the first intermediate plate has an introduction opening formed across the plurality of discharge notches formed in the second intermediate plate as viewed in the plate thickness direction, and which receives the fluid supplied from the fluid supply hole and guides it to each of the discharge notches; and a plurality of introduction notches connected to outer edges of the introduction opening, which are concave and open toward the introduction opening as viewed in the plate thickness direction, and which overlap with a portion of each of the plurality of discharge notches, The machine tool, characterized in that the inlet opening, the plurality of inlet notches, and the plurality of outlet notches form the fluid passage.