JPH0234739B2 - KOSAKUKIKAINOSUPURATSUSHUGAADO - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] 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 in the machining area of the machine tool. A replacement pallet is placed on the work table, and a vertical partition cover installed between the pallet changer and the pallet table provided outside the machining area is used to operate the pallet changer. Therefore, the present invention relates to a splash guard for a machine tool having a mechanism for reversing the front and back sides.

[Conventional technology and problems]

Machine tools have traditionally been equipped with a splash guard that surrounds the machining section where a spindle head with a spindle, a cutting fluid spraying means, a work table for attaching the workpiece, etc. are installed 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 with the work table of the machine tool. The front plate of the splash guard is placed between the work table and the pallet stand to prevent the pallet stand from being exposed to cutting splashes during machining.

However, such a splash guard has the disadvantage that when replacing pallets, a unique drive device is required to open the front plate placed between the work table and the pallet stand, and the opening mechanism is relatively complicated. be.

Accordingly, the present invention utilizes the operation of the pallet changer when exchanging pallets by the pallet changer to reverse the vertical partition plate forming the front plate of the splash guard. The present invention aims to eliminate the above-mentioned drawbacks of the conventional method by making both the front and back surfaces usable for preventing cutting fluid from scattering.

[Means of solution and action]

In order to achieve the above-mentioned objects of the invention, the present invention includes a work table that surrounds the machining area of a machine tool and is provided in the machining area, and a pallet chain that moves up and down and rotates when exchanging pallets with respect to the work table. A splash guard for a machine tool has a vertical partition cover between the pallet table and the pallet table provided outside the machining area across the pallet changer. a vertical support rod that holds the 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 coupled to the top cover plate and configured to pivot and retreat the respective horizontal sealing plates engaged with the right and left side edges of the vertical partition cover as the top cover plate rises and retreats. and forming a splash guard that allows the vertical partition cover to be turned inside out as pallets are exchanged by rotating the pallet changer after the top cover plate and both lateral sealing plates are retreated, At the same time, both the front and back surfaces of the vertical partition cover are used to prevent 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 direction of the - arrow in FIG. 1, and FIG. Figure 4 is a partial side view showing the upper end structure of the vertical support rod as seen from A in Figure 1.
5 is a partial side view of the machine tool as seen from the - arrow line in FIG. FIG. 2 is a front external view of the machine tool.

First, referring to FIGS. 6 and 7, there is shown an external view of a machine tool with a pallet changer equipped with a splash guard. A head 12 is attached and is movable 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 at a lowered position along the column 10, it is mounted on a work table 18 for mounting a workpiece provided in front of the tool spindle 16 with a pallet 20 interposed therebetween. Perform machining on the processed workpiece. That is, the spindle head 12 and the work table 18 are provided in a machining area formed in front of the front surface of the column 10, and the machining tool attached to the tip of the tool spindle 16 during machining is placed in the same area. A cutting fluid spraying means for spraying and supplying cutting fluid to the workpiece on the work table 18 is also provided. 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. Further, a pallet changer 26 is provided at the front end of the head 24 of the machine tool, and pallets 20a and 20a prepared on a pallet stand (not shown in the figure) provided inside a pallet changer cover 28 are provided. Automatic pallet exchange with the pallet 20 on the work table 18 is performed. The splash guard 30 is provided as a housing structure having a ceiling 32 and enclosing the above-mentioned machining section, and an opening/closing door 36 with a handle 34 is provided on the side surface for easy access during setup operations, etc. The door 36 can be opened and closed when necessary.
It is configured such that the tool spindle 16 of the spindle head 12 can be accessed by opening. The front plate 38 of the splash guard 30 also includes a vertical partition cover 42 that is attached to a vertical support rod 40 that stands upright on the pallet changer 26 and covers the front part, and side edges 42a and 42b of this vertical partition cover 42. Lateral sealing plates 44a, 44 with engaging inner edges 46a, 46b
b. The upper cover plate 48 has a lower edge 48a engaged with the upper edge 42c of the vertical partition cover 42, and the above-mentioned horizontal sealing plates 44a and 44b both have inner edges 46a and 46b. The vertical partition cover 42 is pivoted forward about a vertical pivot axis (not shown in FIGS. 6 and 7) provided on each outer edge opposite to the vertical partition cover 42. The upper cover plate 48 is configured to be able to be released from the engagement seal, and the upper cover plate 48 is configured to be raised and retreated into the ceiling cover 32 to release the engagement seal with the upper edge 42c of the vertical partition cover 42. . And both sealing plates 44a, 4 mentioned above
4b and the upper cover plate 48 are respectively rotated backward and raised backward, the vertical partition cover 42 is connected to the vertical support rod 40.
At the same time, it can be turned 180 degrees and turned inside out. In other words, when both the front and back sides of the vertical partition cover 42 face the machined section, the cutting fluid splashed in the machined section is scattered and contaminated on the pallet table outside the machined section, the floor surface around the machine, etc. It functions in such a way that it does not. Of course, during the cutting fluid scattering prevention action, the upper cover plate 48, both lateral sealing plates 44a,
It goes without saying that 44b is returned to the engaged and sealed position.

Next, referring to FIG. 1, the pallet changer 26 mentioned above automatically changes the pallets 20, 20a (FIG. 6) between the pallet table and the work table 18 according to the progress of machining, as described above. It is designed to be exchangeable, and its specific structure and operation are detailed in the applicant's earlier application (filed on July 31, 1985 titled ``Pallet Changer for Machine Tools''). To give an overview, the pallet changer 2
6 is equipped with two sets of changer arms 50, 50, each set of changer arms 50, 50 mutually clamps the pallet 20 on the work table 18 or the pallet 20a on the pallet stand from the position shown in FIG. Then, the changer arms 50, 50 close the pallet 20 or 2.
While holding 0a, raise the pallet 2.
0 and 20a from the work table 18 and pallet stand, and then lift both sets of changer arms 5.
0,50 holds pallets 20,20a
When the workpiece is rotated by 180 degrees, the pallet 20 is transferred from the work table 18 to the pallet stand, and the pallet 20 is transferred from the work table 18 to the pallet stand.
a pivots from above the pallet table to above the work table 18, and here each set of changer arms 50,
If 50 is moved downward from now on, each pallet 2
0 and 20a are placed on the pallet stand and work table 18. Next, each set of chain gear arms 50,
50 is returned to the open arm position shown in FIG. 1, and the automatic pallet exchange is completed. The first cylinder device 52 includes the above-mentioned chain gear arm 50,
The second cylinder device 54 is a drive source that starts the closing operation of the chain arm 50, the opening arm return operation, and the raising and lowering operation through a cam mechanism built in the cam cover 56. This is a drive source that starts the rotation through a meshing 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 in conjunction with FIG. 1, a vertical support rod 40 holding a vertical partition cover 42 is shown.
The lower end of the vertical support rod 40 is attached so that the center of the vertical support rod 40 is approximately coaxial with the pivot axis around which the changer arms 50, 50 of the pallet changer 26 grip the pallet and rotate through 180 degrees. . 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
is a bolt 6 tightened with a nut on the lower end of the lifting rod 62
The connecting screw 66 attached to the upper end of the vertical support rod 40 can be rotated by a desired amount at the lower end of the vertical support rod 4.
The nut 68 is an adjustment nut for transmitting the vertical movement without play, and the spacer 70 connects the vertical support rod 40 to the coupling screw 66. This is an interposed member for smooth rotation with the

On the other hand, the upper end of the lifting rod 62 is loosely fitted into and supported by the hole 76 of a bracket 74 with a support hole fixed to a splash guard beam 72 installed horizontally in the ceiling cover 32 of the splash guard 30, as described above. When a vertical movement is transmitted from the vertical support rod 40 through the communication mechanism 60, the bracket 74 with support holes moves up and down by the same amount. In FIGS. 1 and 3, the ascending and descending positions of the vertical support rod 40 and the associated ascending and descending positions of the elevating rod 62 are illustrated by two-dot chain lines. In addition, splash guard beam 7
2 is firmly supported by the splash guard frame member 78 at appropriate positions via brackets 80. Further, the lifting rod 62 has a horizontal pin 82 at its midpoint.
It is coupled to the link mechanism 84 by. This link mechanism 84 consists of two link rods 8 arranged crosswise.
6a, 86b, both link rods 86a, 86b
The upper ends 88 of both link rods 86a, 86b are pivotally connected to the horizontal pin 82 at the intersection points of
a and 88b are the splash guard beams 72 mentioned above;
It is pivotally connected to fulcrum brackets 90a and 90b attached to the fulcrum brackets 90a and 90b. Also, both link rods 86a, 86b
Each lower end 92a, 92b has elongated holes 94a, 94b, and these elongated holes 94a, 94b
It fits into pins 96a, 96b attached to the upper edge of the pins 96a, 96b and the elongated holes 94a,
Both link rods 86 are connected by sliding with 94b.
a, 86b and the upper cover plate 48 are coupled. In this case, both link rods 86a, 8 of the link mechanism 84
6b are provided symmetrically with respect to the axis of the lifting rod 62, and are connected to pins 96a and 96b at positions equidistant from the center of the upper covering plate 48, respectively.
Therefore, when the lifting rod 62 is actuated by the vertical support rod 40 to move up and down, the link mechanism 84 amplifies the lifting stroke amount of the lifting rod 62 by a fixed factor during the telescopic operation and transmits it to the upper cover plate 48. The plate 48 is raised and lowered. In other words, the amount of vertical movement of the upper cover plate 48 caused by the vertical support rod 40 and the vertical movement of the vertical support rod 62 is greater than the amount of vertical movement of the vertical support rod 40 and the vertical movement rod 62. As a result, when the vertical support rod 40 moves up with the vertical partition cover 42, the amount of movement of the upper cover plate 48 during this movement is large, so that the upper edge of the vertical partition cover 42 shown in FIG.
2c and the lower edge 48a of the upper cover plate 48 are disengaged, and when the vertical support rod 40 descends together with the vertical partition cover 42 from the disengaged state, the upper cover plate 48
Since the latter lowering amount is large, 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 Figures 4 and 5, the first
The operating mechanism on the side of the horizontal sealing plate 44a, indicated by "A" in the figure, is representatively shown.

Now, at the left and right ends of the upper cover plate 48 mentioned above, there is a turning operation mechanism 100 for a pair of horizontal sealing plates 44a and 44b.
100 (only the horizontal sealing plate 44a side is shown in FIGS. 1 and 4), and the pivoting mechanism 100 is provided with a mounting screw 101 on the upper cover plate 48.
It has a vertical bar 102 fixed at
The upper end 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 slit 110a formed in one corner of a pivot plate 108 that can pivot around a fulcrum 106,
When the horizontal pin 10 moves upward, the horizontal pin 10
4, a turning moment about the fulcrum 106 is applied to the turning plate 108. The swivel plate 108 is pivotally connected 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, and other joints of the swivel plate 108 In the other slit 110b formed in the splash guard beam 7
A slide plate 1 is provided in front of 2 so as to be movable laterally.
The horizontal pin 116 protruding forward from 14 engages with the horizontal pin 116, and the horizontal pin 11
6, the slide plate 114 is given lateral movement as indicated by arrow S. At this time, 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 to guide the lateral movement of the slide plate 114. The slide plate 114 indicated by the two-dot chain line in FIG. 4 is shown in a state in which it has moved laterally to the right, and this lateral rightward movement is ultimately caused by the upward movement of the upper cover plate 48. At this time, the left horizontal end plate 122 of the slide plate 114 is attached to the pivot lever 12 which projects horizontally from the pivot shaft 124 to which the left edge of the horizontal sealing plate 44a is engaged.
6 via a pivot pin 128. 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 an appropriate bearing bracket (not shown). has been done. Note that the pivot shaft 124 is provided inside the side cover 132 of the splash guard 30.

When the slide plate 114 moves laterally and to the right as described above, the pivot lever 126 is moved via the pivot pin 128.
As a result, a turning force acts on the turning shaft 124 to which the turning lever 126 is attached, causing a turning operation. Therefore, this pivot axis 1
The horizontal sealing plate 44a attached to the pivot shaft 12
It is rotated around 4. The turning operation of the horizontal sealing plate 44a is to open the horizontal sealing plate 44a toward the front of the machine tool and away from the vertical partition cover 42, and since this is caused by the upward movement of the upper cover plate 48, the upper cover plate 48 to separate from the vertical partition cover 42. 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 also returns so that its inner side 46a engages with the side edge 42a of the vertical partition cover 42. . The right horizontal sealing plate 44b also engages and dissociates from the other side edge 42b of the vertical partition cover 42 in exactly the same manner.

As is clear from the above explanation, when the vertical support rod 40 holding the vertical partition cover 42 moves upward at the start of the pallet exchange action of the pallet changer 26, the lifting rod 62 and the link mechanism move as described above. 8
4, the top cover plate 48 rises and retreats from the upper edge 42c of the vertical partition cover 42, and along with this, the horizontal sealing plates 44a and 44b on both sides also move upward and backward through the rotation actuation mechanisms 100 and 100. Side edge 42
Turn back from a and 42b. Therefore, the vertical partition cover 42 can be pivoted together with the vertical support rod 40.

At this stage, the pallet changer 26 is operated to rotate its changer arms 50, 50 (FIG. 1) through 180 degrees to perform pallet exchange. Accordingly, as the changer arms 50, 50 rotate through 180 degrees, the vertical support rod 40 and the vertical partition cover 42 simultaneously rotate so that their front and back surfaces are reversed. In other words, the vertical partition cover 4 that forms the front plate of the splash guard 30 can be adjusted according to the exchange of new and old pallets.
2 can be reversed. The pallet changer 26 moves the replaced pallet table to the work table 18 as described above after turning the pallet table by 180 degrees.
At this time, the vertical partition cover 42 and the vertical support rod 40 also move downward as they move downward to place them on the pallet table (FIG. 6). Therefore, the link mechanism 84 and the swing operation mechanism 10 have an operation opposite to the above-mentioned operation.
0, and as a result, the upper cover plate 48 and both lateral sealing plates 4
4a and 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 the workpieces on the 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 outside the machining area. The vertical partition cover is installed to partition the vertical partition cover from the pallet table, and uses the pallet exchange action of the pallet changer, that is, the drive source of the pallet changer is used as a common drive source to flip the vertical partition cover inside out. Since both the front and back sides of the vertical partition cover are used as plates to prevent cutting fluid and chips from scattering, the trouble of opening and closing the splash guard individually when changing pallets as in the past is eliminated, and the drive speed is reduced. By reducing the number of means, it can also contribute to reducing the cost of machine tools.

[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 direction of the - arrow in FIG. 1, and FIG. FIG. 4 is a detailed view of section A in FIG. 1, FIG. 5 is a partial side view as seen from the - arrow line in FIG. 4, and FIG. 7 is a side external view of a machine tool with a pallet changer equipped with the splash guard of the present invention, and FIG. 7 is a front external view of the same machine tool. 10...Column, 12...Spindle head, 18...Work table, 20, 20A...Pallet, 26
...Pallet changer, 30...Splash guard, 32...Ceiling, 38...Front plate, 40...
... Vertical support rod, 42 ... Vertical partition cover, 44a,
44b...Horizontal sealing plate, 48...Top cover plate, 60...
Connection mechanism, 62... Lifting rod, 84... Link mechanism, 100... Swivel operation mechanism, 102... Vertical bar,
104, 116...Horizontal pin, 108...Swivel plate, 114...Slide plate, 124...Swivel axis,
126...Swivel lever.

Claims (1)

[Claims] 1. A work table surrounding a machining area of a machine tool and provided in the machining area;
In the splash guard of a machine tool, the machine tool has a vertical partition cover between it and a pallet table provided outside the machining area, sandwiching a pallet changer that moves up and down and rotates when exchanging pallets with respect to the work table. a vertical support rod that is connected to and erected on the pallet changer and holds the vertical partition cover; a link mechanism for raising and retracting the engaged upper cover plate, and each horizontal sealing plate coupled to the upper cover plate and engaging the right and left side edges of the vertical partition cover as the upper cover plate rises and retreats. The vertical partition cover is configured to include a pair of left and right turning mechanisms for turning back and forth, and after the upper cover plate and both lateral sealing plates have moved back, the vertical partition cover can be moved from front to back in conjunction with pallet exchange by turning the pallet changer. A machine tool splash guard characterized by being inverted. 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. A splash guard for a machine tool according to claim 1, comprising an amplifying linkage configured to obtain a splash guard. 3. Each of the pair of left and right turning mechanisms includes an elevation-lateral movement conversion mechanism consisting of a turning plate and a pin provided between the upper covering 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 an elevation-lateral movement conversion mechanism.