JPS6244348A - Splash guard for machine tool - Google Patents

Abstract

PURPOSE:To obviate the opening and closing operation of a splash guard in interchange of pallets by mounting a vertical partition cover on a support rod erected on a pallet changer and overturning the vertical partition plate from front to back by utilizing the interchanging action of the pallet changer to provide a splash preventing plate for preventing splash of cutting liquid or the like. CONSTITUTION:The front face plate of a plash guard is 40 constituted from a vertical partition cover 42 mounted on a longitudinal supported rod 40 erected on a pallet changer 26, lateral enclosing plates 44a, 44b for enclosing both side edges of said cover 42 and an upper cover plate 48 for enclosing the upper edge of said cover 42. Said plate 48 is moved vertically by a lift 62 rod coupled with the support rod 40 and crossing linkage 84 as the support rod ascends and descends. The asending and descending amount of said plate 48 is larger than that of the support rod 40 according to the position of link fulcrum. The lateral enclosing plates 44a, 44b are opened and closed forward according to the asent and descent of said plate 48 through the left and right of said plate 48 and turning operation mechanism A'. By this constitution, when the changer 26 ascends in interchange of pallets, the enclosing plate is opened on the upper portion and both sides and the partition plate 42 is rotated from front to back, lowered and close the enclosing plate.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a splash guard for preventing cutting fluid from scattering used in a machine tool with a pallet changer, and particularly for a work table and its workpiece in the machining area of the machine tool. It has a mechanism that places a replacement pallet on the table and flips the vertical partition cover provided between the pallet changer and the pallet stand provided outside the machining area according to the operation of the pallet changer. Regarding splash guards for machine tools.

[Prior art and problems]

Machine tools have conventionally been provided with a splash guard that surrounds a machining section where a spindle head with a spindle, a cutting fluid spraying means, a work table for mounting a workpiece, etc. are provided to prevent cutting fluid from scattering.

In addition, machine tools equipped with a pallet changer have a configuration in which pallets are prepared on a pallet stand installed outside the machining section and pallets are exchanged between them and the work table of the machine tool, which inevitably results in splashes. The front plate of the guard is placed between the work table and the pallet stand to prevent the pallet stand from being exposed to cutting spray during machining.

However, such splash guards have the disadvantage that when replacing the pallet, a unique drive device is required to open the front plate located between the work table and the pallet stand, and the opening mechanism is relatively complex. There is.

Therefore, the present invention utilizes the operation of the pallet changer when exchanging pallets with the pallet changer to reverse the vertical partition plate forming the front plate of the splash guard, thereby preventing cutting fluid from scattering on both the front and back surfaces of the vertical partition plate. It is an object of the present invention to solve the above-mentioned drawbacks of the conventional technology by making it possible to prevent the above-mentioned problems.

[Means of solution and action]

In order to achieve the above-mentioned object of the invention, the present invention includes a work table that surrounds a machining area of a machine tool and is provided in the machining area, and a pallet changer that moves up and down and rotates when exchanging pallets with respect to the work table. In the splash guard of a machine tool, which has a vertical partition cover between it and a pallet stand provided outside the machining area, the vertical partition cover is connected to the pallet changer, stands upright, and holds the vertical partition cover. a support frame; a link mechanism that is coupled to the vertical support frame and raises and retreats the top cover plate engaged with the upper edge of the vertical partition cover according to the upward movement of the vertical support rod; and a link mechanism that is coupled to the top cover plate; and a pair of left and right turning mechanisms for swinging and retracting the respective horizontal sealing plates engaged with the right and left edges of the vertical partition cover as the upper cover plate rises and retreats, and the upper cover plate and After the both lateral sealing plates retreat, a splash guard is formed so that the vertical partition cover can be turned over when the pallet is replaced by rotating the pallet changer, and both the front and back sides of the vertical partition cover are used when the pallet is replaced. This prevents the cutting fluid from scattering. Hereinafter, the present invention will be described in detail based on embodiments shown in the accompanying drawings.

FIG. 1 is a front view showing a splash guard for a machine tool according to the present invention, FIG. 2 is a plan view of a vertical partition cover seen from the line of arrow nn in FIG. 1, and FIG. A partial side view showing the upper end structure of the vertical support frame as seen from the line of arrow m, FIG. 4 is a detailed view of section A in FIG. 1, and FIG.
FIG. 6 is a side external view of a machine tool with a pallet changer equipped with a splash guard, and FIG. 7 is a front external view of the same machine tool.

First, referring to FIGS. 6 and 7, there is shown an external view of a machine tool with a valent changer equipped with a splash guard. It is mounted so that it can be moved up and down along the front surface of the column 10 by a motor 14. A tool spindle 16 is provided at the tip of the spindle head 12, and is provided in front of the tool spindle 16 at a lowered position along the column 10, so that it is mounted on a work table 18 for mounting a workpiece with a pallet 20 interposed therebetween. Perform machining on the processed workpiece. That is, the spindle head 12 and the work table 18 are installed in a machining area formed in front of the front surface of the column 10, and are mounted on the machining tool attached to the tip of the tool spindle 16 during machining. A cutting fluid spraying means is also provided for spraying and supplying cutting fluid to the workpiece on the work table. A control panel 22 is provided on the back side of the column 10, and a table feeding device (not shown) provided on a machine base 24 is provided below the work table 18. Also, the front end of the head 24 of the machine tool is connected to the pallet changer 2.
6 is provided to perform automatic pallet exchange between a pallet 20a prepared on a pallet stand (not shown in the figure) provided inside a pallet changer cover 28 and a pallet 20 on the work table 18. The splash guard 30 is provided as a box-shaped structure having a ceiling 32 and largely enclosing the above-mentioned machining section, and an opening/closing door 36 having a handle 34 is provided on the side surface to facilitate operations necessary for setup operations, etc. When the opening/closing door 36 is opened, the tool spindle 1 of the spindle head 12 is opened.
It is constructed so that it can be approached to 6. In addition, the front plate 38 of the splash guard 30 is
A vertical partition cover 42 is attached to the vertical support rod 40 standing upright to cover the front surface, and an inner edge 46a engages with both side edges 42a and 42b of the vertical partition cover 42.

The horizontal sealing plates 44a, 44b have horizontal sealing plates 46b, an upper cover plate 48 has a lower edge 48a engaged with the upper m42c of the vertical partition cover 42, etc.
4b are both oriented forward about longitudinal pivot axes (not shown in FIGS. 6 and 7) provided on each outer edge opposite to their inner edges 46a, 46b. The upper cover plate 48 is formed so that it can be pivoted and opened to release the engagement seal with the vertical partition cover 42, and the upper cover plate 48 is raised and retreated into the ceiling cover 32 to engage with the upper edge 42c of the vertical partition cover 42. It is configured so that the joint seal can be released. When the above-mentioned resealing plates 44a, 44b and the top cover plate 48 turn back and move upward, the vertical partition cover 42 can turn 180 degrees together with the vertical support rod 40 and turn the inside out. be. In other words, when the front and back surfaces of the vertical partition cover 42 face the machining section, the cutting fluid splashed by the machining section scatters onto the pallet table outside the machining section, the floor surface around the machine, etc., and contaminates the machine. It functions in such a way that it does not. Of course, during the cutting fluid scattering prevention action, the upper cover plate 48
Needless to say, the lateral sealing plates 44a and 44b are returned to the engagement sealing position.

Next, referring to FIG. 1, the above-mentioned pallet changer 26 moves the pallets 20, 20a (
(Fig. 6), and its specific structure and operation are described in detail in the applicant's previous application "Pallet Changer for Machine Tools" dated July 31, 1985. has been done.

Briefly, the pallet changer 26 is equipped with two sets of changer arms 50, 50, and each set of changer arms 50, 50 is moved from the position shown in FIG. 1 to the pallet 20 on the work table 18 or the pallet stand. The upper pallet 20a is tightly clamped and closed, and then the changer arms 50 and 50 are raised while gripping the pallet 20 or 20a to lift the pallets 20' and 20a from the work table 18 and the pallet stand, respectively. After that, both sets of changer arms 50, 5
0 holds pallets 20 and 20a 180°
When this rotation is performed, the pallet 20 moves from above the work table 18 to the pallet stand, and the pallet 20a turns from the pallet stand to above the work table. When the lowering operation is performed, the pallets 20 1 and 20 a are respectively placed on the pallet stand and the work table 18 . Next, each set of changer arms 50.degree. 50 is returned to the opening position shown in FIG. 1, and the automatic exchange of pallets is completed. The first cylinder device 52 is a drive source that starts the closing operation, opening return operation, and lifting and lowering operations of the changer arms 50 and 50 described above via a cam mechanism built in the cam cover 56, and the second cylinder device Reference numeral 54 denotes a drive source that starts the 180° rotation of the changer arms 50, 50 described above through an engagement mechanism between a rack built in the rack cover 58 and a pinion attached to the internal rotation shaft.

Referring now to FIGS. 2 and 3 together with FIG. 1, the lower end of the vertical support rod 40 holding the vertical partition cover 42 is connected to the pallet 180 by the changer arms 50 and 50 of the pallet changer 26 mentioned above. It is mounted so that the center of rotation and the center of the vertical support rod 40 are substantially coaxial. On the other hand, the upper end of the vertical support rod 40 is connected to a lifting rod 62 via a communication mechanism 60. This communication mechanism 60 has a bolt 6 tightened to the lower end of the lifting rod 62.
Connecting screw 6 attached to the upper end of the vertical support rod 40 at the lower end of 4
The nut 6 has a well-known structure that enables the desired amount of rotation and connects the vertical support rod 40 to directly transmit the lifting movement to the lifting rod 62. The spacer 70 is an interposed member for smoothing the rotation of the vertical support rod 40 and the coupling screw 66.

On the other hand, the upper end of the lifting rod 62 connects to the splash guard beam 7 installed horizontally within the ceiling cover 32 of the splash guard 30.
Bracket with support hole fixed to 2, hole 7 of door 4
Since it is loosely fitted and supported by the bracket 6, when the vertical support rod 40 transmits the vertical movement through the connection mechanism 60 mentioned above, the bracket/nod 74 with the support hole will act as one body to perform the same movement. conduct.

In FIGS. 1 and 3, the ascending position of the vertical support rod 40 and the associated ascending position of the elevating rod 62 are illustrated by two-dot chain lines.

The splash guard beam 72 is firmly supported by the splash guard frame member 78 at appropriate positions via brackets 80. Further, the lifting rod 62 is connected to a link mechanism 84 by a horizontal pin 82 at its midpoint. This link mechanism 84 has two link rods 86 arranged crosswise.
a.

86b, and is pivotally connected to the horizontal pin 82 at the intersection of both link rods 86a, 86b, and the upper ends 88a, 88b of both link rods 86a, 86b are connected to the splash guard beam 72 mentioned above. Mounted fulcrum bracket 9
It is pivotally connected to 0a and 9Qb. Also, both link rods 86a
, 86b, each lower end 92a, 92b is a long hole 94a.

94b, and these long holes 94a, 94b are formed in the upper cover plate 4.
8, and the pins 96a, 96b are slidably connected to the elongated holes 94a, 94b to connect the two rods 86a, 86b to the upper cover plate 48. has been done. In this case, the link mechanism 84
Both link rods 86a and 86b are provided symmetrically with respect to the axis of the lifting rod 62, and are connected to a pin 96a at positions equidistant from the center of the upper cover plate 48, respectively.

96b. Therefore, the lifting rod 62 is the vertical support rod 4.
0 and moves up and down, the link mechanism 84 amplifies the up and down stroke amount of the up and down rod 62 by a constant magnification during the telescopic operation and transmits it to the upper cover plate 48, thereby raising and lowering the upper cover plate 48. In other words, the amount of lifting and lowering movement of the upper cover plate 48 caused thereby is greater than the lifting movement of the vertical support rod 40 and the lifting rod 62.

As a result, when the vertical support rod 40 moves up together with the vertical partition cover 42, the amount of movement of the upper cover plate 48 during this period is large, so that the upper edge 42c of the vertical partition cover 42 shown in FIG.
The engagement with the lower edge 48a of the upper cover plate 48 is released, and
When the vertical support rod 40 descends together with the vertical partition cover 42 from the disengaged state, the upper cover plate 48 also descends, and since the latter descends by a large amount, the engaged state shown in FIG. 1 is restored. In other words, such an engaged state ensures that the splash guard 30 is prevented from scattering cutting fluid.

Next, the operating mechanism of the horizontal sealing plates 44a and 44b will be explained with reference to FIGS. 4 and 5 as well as FIGS. 1 and 2. Both horizontal sealing plates 44a and 44b have completely symmetrical structures Therefore, in FIGS. 4 and 5, the operating mechanism on the side of the horizontal sealing plate 44a indicated by "A" in FIG. 1 is representatively shown.

Now, at the left and right ends of the above-mentioned top cover plate 4B, a pair of horizontal sealing plates 44a and 44b are provided with a rotation operating mechanism 100. 100 (1st
4, only the side of the horizontal sealing plate 44a is shown. ), the pivot operation mechanism 100 has a vertical bar 102 fixed to the upper cover plate 48 with a mounting screw 101,
The upper end of this vertical bar 102 projects upward from the upper edge of the upper cover plate 48, and has a horizontal pin 104 at the projecting end. This horizontal pin 104 has a substantially triangular shape and engages with a sling 110a formed at one corner of a swivel plate 108 that can pivot around a fulcrum 106, and when the upper cover plate 48 moves upward, it vertically moves. A turning moment about a fulcrum 106 is applied to the turning plate 108 from the horizontal pin 104 via the rod 102 . The rotating plate 108 is pivotally attached to the above-mentioned splash guard beam 72 of the splash guard 30 on a pin of a fulcrum 106 that projects horizontally from the bracket 112.
A horizontal pin 116 protruding forward from a slide plate 114 movably provided in front of the splash guard beam 72 engages with another slit 110b formed in another biased part of the swing machine 108. The swing of the swing machine 108 imparts lateral movement to the slide plate 114 as indicated by an arrow S via the horizontal pin 116. At this time, the two guide pins 120a and 120b protruding from the splash guard beam 72 are engaged with the elongated holes 118 of the slide plate 114.
Guides the lateral movement of the slide plate 114. The slide Fi, 114 indicated by the two-dot chain line in FIG.
This is caused by the upward movement of At this time, the left horizontal end plate 122 of the slide plate 114 is engaged via a pivot pin 128 with a pivot lever 126 that projects horizontally from a pivot shaft 124 to which the left edge of the horizontal sealing plate 44a is locked. There is.

The upper end of the pivot shaft 124 is rotatably supported by a bearing bracket 130 fixed to the splash guard beam 72, and the lower end is similarly rotatably supported by a suitable bearing bracket (not shown). . Note that the pivot shaft 124 is provided inside the side cover 132 of the splash guard 30.

When the slide plate 114 moves sideways as described above, a turning moment acts on the turning lever 126 via the pivot pin 128, and as a result, a turning force acts on the turning shaft 124 to which the turning lever 126 is attached. Rotate and rotate. Therefore, the horizontal sealing plate 44a, which is attached to the pivot shaft 124, is pivoted about the pivot shaft 124.

The turning operation of the horizontal sealing plate 44a is to open the horizontal sealing plate 44a so as to move away from the vertical partition cover 42 toward the front of the machine tool.
Since this is caused by the upward movement of the top cover ItFi 48, it operates to separate from the vertical partition cover 42 together with the top cover plate 48. When the upper cover plate 48 moves downward and engages with the upper edge of the vertical partition cover 42, the horizontal sealing plate 44a
The inner side 46a of the vertical partition cover 42 is the side edge 42a of the vertical partition cover 42.
return to engage with. In addition, the right horizontal sealing plate 44
b is also engaged with and separated from the other side edge 42b of the vertical partition cover 42 by the same structure.

As is clear from the above explanation, when the vertical support rod 4o holding the vertical partition cover 42 moves upward at the start of the pallet exchange operation of the pallet changer 26, the lifting rod 62 and the link mechanism 84 are moved as described above. The upper cover plate 48 moves upwardly and backwardly from the upper edge 42c of the vertical partition cover 42, and along with this, the horizontal sealing plates 44a on both sides are moved via the pivoting mechanisms 100, 100.

44b also pivots back from the side edges 42a, 42°b of the vertical partition cover 42. Therefore, the vertical partition cover 42 is the vertical support rod 4
It becomes possible to turn with 0.

At this stage, the pallet changer 26 is operated by rotating its changer arms 50, 50 (FIG. 1) 18 degrees to perform pallet exchange. Therefore, according to the 18o degree turning movement of the changer arms 50, 50, the vertical support rods 4
0, the vertical partition cover 42 simultaneously turns so that its front and back surfaces are reversed. In other words, the vertical partition cover 42 forming the front plate of the splash guard 30 can be reversed in response to replacing the pallet with a new one. After the pallet changer 26 has rotated through 18 degrees, it moves downward to place the replaced pallet stand on the work table 18 (FIG. 6) and the pallet stand as described above.
At this time, the vertical partition cover 42 and the vertical support rod 40 also move downward. Therefore, an action opposite to the above-mentioned action occurs in the link mechanism 84 and the turning operation mechanism 100, and as a result, the upper cover plate 4
8 and both lateral sealing plates 44a.

44b return to their respective engagement positions and work together with the vertical partition cover 42 to prevent cutting fluid and chips from scattering during machining operations on workpieces on a new pallet.

〔Effect of the invention〕

As described above, according to the present invention, in a machine tool with a pallet changer, the vertical partition plate forming the front plate of the splash guard surrounding the machining section of the machine tool is connected to the work table and the pallet stand outside the machining area. The vertical partition cover is provided as a partition between the vertical partition cover and the vertical partition cover, and the vertical partition cover is turned inside out by using the pallet exchange action of the pallet changer, that is, by using the drive source of the pallet changer as a common drive source. Since both the front and back sides of the pallet are used as plates to prevent cutting fluid and chips from scattering, the conventional process of opening and closing splash guards individually when changing pallets is eliminated, and the cost of machine tools is reduced by reducing the number of driving means. This can also contribute to reduction.

[Brief explanation of drawings]

FIG. 1 is a front view showing a splash guard for a machine tool according to the present invention, FIG. 2 is a plan view of a vertical partition cover seen from the n-tt arrow line in FIG. 1, and FIG. Partial side view showing the upper end structure of the vertical support rod as seen from the line of arrow m, No. 4
The figure is a detailed view of part A in Figure 1, Figure 5 is a partial side view taken from the line of arrow V-V in Figure 4, and Figure 6 is a machine tool with a pallet changer equipped with the splash guard of the present invention. A side external view, and Fig. 7 is a front external view of the same machine tool. 10...Column, 12...Spindle head, 1
8...Work table, 20.20A...Pallet, 26...Pallet changer, 30...Splash guard, 32...Ceiling, 38...Front plate, 4
0... Vertical support rod, 42... Vertical partition cover,
44a, 44b... Horizontal sealing plate, 48... Upper cover plate, 6
0...Connection mechanism, 62...Elevating rod, 84...
・Link mechanism, 100...Swivel operation mechanism, 102
...Vertical bar, 104, 116...Horizontal pin, 108...Swivel plate, 114...Slide shield, 124...Swivel axis, 126 Upper swing lever.

Claims (1)

[Claims] 1. The above-mentioned machine includes a work table that surrounds the machining area of the machine tool and is provided in the machining area, and a pallet changer that moves up and down and rotates when exchanging pallets with respect to the work table. In a machine tool splash guard having a vertical partition cover between it and a pallet stand provided outside the processing area, a vertical support rod connected to and erected on the pallet changer and holding the vertical partition cover; a link mechanism that is coupled to the vertical support rod and raises and retreats the top cover plate that is engaged with the upper edge of the vertical partition cover in accordance with the upward movement of the vertical support rod; a pair of left and right turning mechanisms that pivot and retreat the respective horizontal sealing plates engaged with the left and right edges of the vertical partition cover as the plates rise and retreat; A splash guard for a machine tool, characterized in that the vertical partition cover is turned over when the pallet is replaced by rotating the pallet changer after the plate is retreated. 2. The link mechanism coupled to the vertical support rod amplifies the upward stroke of the vertical support rod to move the upper cover plate upward and backward, thereby separating the upper cover plate from the upper edge of the vertical partition cover. 2. A splash guard for a machine tool according to claim 1, comprising an amplifying link mechanism configured to allow the splash guard to rotate. 3. Each of the pair of left and right turning mechanisms includes an elevation-lateral movement conversion mechanism comprising a turning plate and a pin provided between the upper cover plate and a turning lever protruding from each of the lateral sealing plates; 2. The splash guard for a machine tool according to claim 1, further comprising a lateral slide member that operates the swing lever in accordance with the elevation/lateral movement conversion mechanism.