JP2020062714A - Machining compartment shutter device - Google Patents

Abstract

To provide a machining compartment shutter device preventing chips deposited on an auxiliary cover from being scattered over a wide range.SOLUTION: A machining compartment shutting device 10 comprises: a pair of side surface panels 21 extending to a machining compartment from a door panel 11; a top surface panel 30 extending along an upper edge of each of the side surface panels 21; and a front surface panel 40 extending along an end edge apart from the door panel 11 of each of the side surface panels 21. The top surface panel 30 is supported so that a top surface panel base end part 31 is flexibly turnable around a horizontal shaft, and is such that a top surface panel tip end part 32 can be vertically displaced at a position lower than the top surface panel base end part 31. The front surface panel 40 is supported so that a front surface panel base end part 41 located at its lower end is flexibly turnable around the horizontal shaft; is such that a front surface panel tip end part 42 located at its upper end can approach to or apart from the door panel 11 at a position nearer to the door panel 11 than to the front surface panel base end part 41; and is abutted to the lower side surface of the top surface panel 30 so as to freely slide.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a machining section shutter device for a machine tool having an automatic pallet changing device.

In a machine tool having an automatic pallet changing device, a preparation section is installed adjacent to a machining section facing the spindle, and a plurality of pallets can be conveyed between each. Then, the work placed on one of the multiple pallets is processed, and at the same time, the preparatory work (setup work) for placing the work on another pallet is performed in parallel, thereby improving work efficiency. Is being pursued.
In the machining section of the machine tool, a splash guard cover or the like that surrounds the machining section is installed in order to prevent chips and coolant from scattering around when machining the work. An opening / closing type processing section shutter is installed at the entrance facing the preparation section of such a guard cover (see Patent Document 1).

In a machine tool having a processing section shutter, the pallet can be exchanged between the processing section and the preparation section by opening the shutter. On the other hand, by closing the shutter, chips and coolant scattered from the processing section can be blocked, and the pallet and the work in the preparation section can be protected from them.
A vertical panel door that does not require a rail on the floor is suitable for the processing section shutter. In the elevating type processing section shutter, the entrance is opened by pulling it upward, and the entrance is closed by lowering it. In the elevating type work section shutter, when height is required, a multi-stage panel in which a plurality of stages are connected vertically is used.

JP, 11-58171, A

In a machine tool having a processing section and a preparation section, a pallet transfer mechanism is installed between them. A combination of guide elements such as guide rails and cam followers and drive elements such as cylinders and chains is used for the transport mechanism, and some of these elements of the transport mechanism are provided with processing section shutters from the preparation section. It is configured to extend continuously through the entrance and exit to the processing section.
Since the continuous direction of the transport mechanism is the direction intersecting with the machining partition shutter, the transport partition interferes with a continuous portion such as a guide rail of the transport mechanism when the machining partition shutter is closed. Therefore, a machine tool that has an opening for inserting a continuous portion such as a guide rail of a transport mechanism in the processing section shutter and a box-shaped auxiliary cover with an open lower surface is installed so as to cover the opening. Proposed.
In such a machine tool, the transport mechanism can reach the processing section through the opening even when the processing section shutter is closed. The extended portion of the transport mechanism that extends into the processing section is covered and protected by the auxiliary cover.

In the processing section shutter with the auxiliary cover described above, chips scattered in the processing section are accumulated on the upper surface of the box-shaped auxiliary cover and fall due to vibration when opening the shutter. Even if the chip falls while the shutter is low, there is no problem as long as the chip falls around. However, when the shutter rises and the chips fall from a high position, the chips are scattered over a wide range, such as the transport mechanism covered by the auxiliary cover, the pallet, or the work.
Among them, the chips attached to the guide rails of the transfer mechanism may affect the transfer operation, and the chips attached to the pallet or the work may affect the processing quality. Therefore, it is required to avoid these unfavorable effects.
It should be noted that if there are chips that are deposited on the auxiliary cover and do not fall, they may be caught between the ceiling of the guard cover and the shutter when the shutter rises, and the guard cover and the auxiliary cover may be damaged. Therefore, it is also required to surely drop the chips accumulated on the auxiliary cover.

  An object of the present invention is to provide a machining section shutter device that can prevent chips accumulated on the auxiliary cover from being scattered over a wide range.

  The machining section shutter device of the present invention includes a door panel that can be moved up and down along the entrance of the machining section of the machine tool, an opening formed at the lower end of the door panel, and an auxiliary cover that covers the opening. The auxiliary cover is disposed between the side panel and a pair of side panels extending from the door panel to the processing section, a top panel disposed between the side panels and extending along an upper edge of the side panel, and the side panel. And a front panel extending along an edge distant from the door panel, wherein the top panel is rotatable about an axis horizontal to the side panel at a base end portion of the top panel close to the door panel. Is supported by the front panel, the tip of the upper panel distant from the door panel can be vertically displaced at a position lower than the base end of the upper panel. The base end of the front panel is rotatably supported about a horizontal axis with respect to the side panel, and the front end of the front panel at the upper end is closer to and separated from the door panel at a position closer to the door panel than the base end of the front panel. The front end of the front panel is slidably abutted on the lower surface of the upper panel.

In the present invention, the entrance / exit of the processing section is formed in a guard cover or the like surrounding the processing section, and the pallet is taken in and out by the carrying device through the entrance / exit.
In the present invention, the door is closed by lowering the door panel. When closing the door panel, the extension of the carrier is passed through the opening of the door panel and covered with an auxiliary cover. In the auxiliary cover, the front panel approaches the extension portion as the door panel descends, and eventually comes into contact with the extension portion to push the front panel. When the extended portion slides and continues to push, the front panel rotates to the side away from the door panel and stands upright on the front surface (side away from the door panel) of the auxiliary cover. By this rotation, the front panel tip portion abuts against the top panel and slides, and the front panel tip portion is lifted to rotate the top panel, and eventually the top panel is placed along the top surface of the auxiliary cover. .
In this state, the chips accompanying the processing in the processing section are deposited on the upper surface panel which is the upper surface of the auxiliary cover. No chip deposits occur in the extension of the transport device covered by the auxiliary cover.

After processing in the processing section, the doorway is opened by raising the door panel. When the door panel rises, the extension portion is displaced downward with respect to the auxiliary cover, the position where the extension portion pushes the front panel moves downward, and the front panel rotates so as to approach the door panel. Then, the support position of the top panel by the front panel tip portion moves toward the door panel, so that the top panel rotates so that the top panel tip portion moves downward. As a result, the top panel is inclined downward from the base end portion of the top panel toward the tip portion of the top panel (toward the side away from the side closer to the door panel).
As the top panel tilts, the chips deposited on it slide off. Since the chip is dropped at a time point when the extension part comes out of contact with the front panel, that is, at a relatively early time of the operation of opening the door panel, the chip accumulated on the auxiliary cover can be discharged at a low position.
Therefore, according to the present invention, it is possible to prevent the chips accumulated on the auxiliary cover from being scattered over a wide range.

The inclination angle of the upper panel in the inclined state can be defined by contact with the front panel front end portion. For example, by supporting the lower surface side of the upper panel by the front panel front end portion, the rotation of the upper panel can be restricted, and thereby the inclination angle of the upper panel may be defined. Alternatively, another member that engages with a part of the upper panel may be provided to directly restrict the rotation of the upper panel. Further, the rotation shaft of the top panel may be provided with an engaging mechanism or the like to restrict the rotation of the top panel at a predetermined angle.
By holding the front panel in an inclined state that is substantially continuous with the top panel, chips that slip off from the top panel can be relayed by the front panel and discharged. In order to keep the front panel in the same inclined state as the top panel, a member that engages with a part of the front panel may be provided to restrict the rotation.

  In the processing partition shutter device of the present invention, it is preferable that the front panel front end has a stopper that restricts rotation of the front panel in a direction approaching the door panel to a predetermined angular position.

According to the present invention as described above, even when the door panel is raised and the extended portion is separated from the front panel, the front panel can be held in the inclined state of the predetermined angle. With this, when the door panel descends, the extension portion can surely perform the operation of pushing the front panel. Further, even when the chip slipping off from the top panel is discharged through the surface of the front panel, it is possible to adjust the inclination suitable for the chip slipping down (slope similar to that of the top panel).
As the stopper, a pin or a block that projects from the side panel and engages with the front panel can be used, or a meshing mechanism formed on the rotating shaft of the front panel can be used.

  In the processing section shutter device of the present invention, it is preferable that the processing section shutter device includes a biasing unit that biases the front panel in a direction in which the front panel front end portion approaches the door panel.

According to the present invention as described above, when the door panel is lifted and the extension portion is separated from the front panel, the front panel can be reliably rotated in the direction in which the front panel tip portion is close to the door panel, and the upper panel is directed downward. It is possible to surely perform the operation of rotating to. Further, when the stopper for restricting the rotation of the front panel is provided, the front panel can be rotated and reliably held at the angular position restricted by the stopper.
As the urging means, a coil spring hung between the front panel and the side panel may be used, or a spiral spring wound around the rotating shaft of the front panel may be used. A non-contact urging means may be used.
Furthermore, by adjusting the direction of the urging force (for example, the tension direction from the front panel of the coil spring), the front panel in a state of being separated from the extended portion can be held at a desired inclination angle even without the above-mentioned stopper or the like. You can also

  In the processing partition shutter device of the present invention, it is preferable that the processing partition shutter device includes a slider that is installed at a front end portion of the front panel to reduce sliding resistance with respect to a surface of the upper panel.

In the present invention as described above, since the front panel tip portion slides on the upper panel through the slider, when the door panel is lowered and the front panel is pushed by the extension portion, or when the door panel is raised, the front panel is removed from the front panel. It is possible to smoothly rotate the upper panel along with the rotation of the front panel when the extension portion separates.
As the slider, a pad or liner made of low-friction synthetic resin can be used, or a roller or the like that rolls on the top panel can be used.

  In the processing partition shutter device of the present invention, it is preferable that the processing partition shutter device has a cushion that is installed at a tip portion of the upper surface panel to mitigate an impact sound at the time of a collision with the surface of the front panel.

In the present invention as described above, when the door panel rises and the extension part is separated from the front panel, and the top panel rotates with the rotation of the front panel, the tip of the top panel of the top panel comes to the surface of the front panel. Even in the case of a collision, the impact noise can be reduced.
As the cushion, a pad or liner made of an elastic material having appropriate elasticity and flexibility such as a synthetic rubber sponge can be used.

  According to the present invention, it is possible to provide a processing section shutter device that can prevent chips accumulated on the auxiliary cover from being scattered over a wide range.

1 is a perspective view showing a main part of a machine tool in which a machining section shutter device according to an embodiment of the present invention is installed. The perspective view showing the processing division shutter device of the above-mentioned embodiment in a closed state. The perspective view showing the processing division shutter device of the above-mentioned embodiment in the opened state. The perspective view which shows the auxiliary cover of the closed state of the said embodiment. The perspective view which shows the auxiliary cover in the opened state of the said embodiment. The expanded sectional view which shows the support part of the upper surface panel of the said embodiment. The expanded sectional view which shows the support part of the front panel of the said embodiment. Sectional drawing which shows the top panel and front panel of the said embodiment in an open state. Sectional drawing which shows the upper surface panel and front panel of the said embodiment in the intermediate state. Sectional drawing which shows the top panel and front panel of the closed state of the said embodiment. The expanded sectional view which shows the slider and cushion of the said embodiment.

An embodiment of the present invention will be described below with reference to the drawings.
FIG. 1 shows a main part of a machine tool 1 in which a machining section shutter device 10 according to an embodiment of the present invention is installed.
In FIG. 1, a machine tool 1 is a machining center or the like having an automatic pallet changer, and has a machining section 2 for machining a workpiece and a preparation section 3 for preparing for machining. In the preparation section 3, work for fixing the work to the pallet 4 is performed. In the processing section 2, a workpiece fixed to the pallet 4 is cut by a tool attached to the spindle.

  The machine tool 1 is provided with a transfer device 5 for transferring the pallet 4 between the preparation section 3 and the processing section 2. Further, a splash guard cover 6 surrounding the processing section 2 is installed in order to prevent chips and coolant from scattering around the processing section 2 during processing of the workpiece.

An entrance 6E for passing the pallet 4 is installed in a portion of the splash guard cover 6 that partitions the preparation section 3 and the processing section 2.
A processing section shutter device 10 is installed at the entrance / exit 6E, and the entrance / exit 6E can be opened when the pallet 4 passes, and the entrance / exit 6E can be closed when the pallet 4 is processed.

The conveying device 5 reaches the processing section 2 from the preparation section 3 through the entrance / exit 6E, and the preparation section part 5A arranged in the preparation section 3 with the entrance / exit 6E as a boundary and the processing section part installed in the processing section 2 It is divided into 5B.
However, in order to improve the transferability of the pallet 4 to the processing section portion 5B, the preparation section portion 5A is partly an extension portion 5E that enters the processing section 2 through the entrance / exit 6E.

2 and 3, the processing section shutter device 10 is shown.
FIG. 2 shows a closed state of the processing section shutter device 10 (a state in which the doorway 6E is closed). FIG. 3 shows an open state of the processing section shutter device 10 (a state in which the doorway 6E is opened).

The processing section shutter device 10 has three door panels 11, 12, and 13. The door panels 11, 12, and 13 are supported on both sides by guide rails so as to be movable up and down. The lowermost door panel 11 is driven up and down by a drive device (not shown).
When the lowermost door panel 11 is in the lowest position (closed state shown in FIG. 2), the three door panels 11, 12, and 13 are sequentially connected to each other to maximize the height of the machining section shutter device 10. In this state, the doorway 6E Will be closed.
In the state where the lowermost door panel 11 is most raised (opened state shown in FIG. 3), the three door panels 11, 12, 13 overlap each other, and the height of the machining section shutter device 10 becomes the minimum. In this state, the doorway 6E The lower part of the is opened.
Although three door panels are used in this embodiment, the number of door panels may be four or more, or two or only one.

The lowermost door panel 11 has a notch-shaped opening 14 formed upward from the lower edge. The opening 14 is shaped and dimensioned so that the extended portion 5E of the transport device 5 can be inserted in the closed state where the door panel 11 is most lowered.
Therefore, the opening 14 can avoid interference with the extended portion 5E, and the processing section shutter device 10 can be closed even if the entrance 6E has the extended portion 5E.

On the lowermost door panel 11, a box-shaped auxiliary cover 20 that covers the opening 14 is installed on the side facing the processing section 2.
The auxiliary cover 20 has a box-shaped lower surface open. Therefore, when the door panel 11 is moved to the lower end position, the extension portion 5E of the transport device 5 can be introduced into the auxiliary cover 20 (see FIG. 4 described later).
Therefore, by covering the opening 14 with the auxiliary cover 20, it is possible to prevent the chip from leaking through the opening 14 while avoiding interference with the extension portion 5E.

  A flap 15 using a flexible rubber sheet or the like is installed on the lower edge of the door panel 11 and the lower edge of the auxiliary cover 20. When the machining partition shutter device 10 is lowered to the lower limit, a slight gap remains between the machining partition shutter device 10 and the floor surface. However, by closing the gap with the flap 15, it is possible to prevent the chips from leaking out.

The auxiliary cover 20 is shown in FIGS. 4 and 5.
FIG. 4 shows the auxiliary cover 20 when the processing section shutter device 10 is in the closed state.
The auxiliary cover 20 has a pair of side panels 21 extending from the lowermost door panel 11 toward the processing section 2.
Between the side panels 21, a top panel 30 is installed along the upper edge of the side panel 21, and a front panel 40 is installed along the edge of the side panel 21 on the side away from the door panel 11. The front panel 40 is arranged to face the opening 14 of the door panel 11.
The lower surface of the auxiliary cover 20 facing the upper panel 30 is open, and the extension portion 5E can be introduced from below.

The top panel 30 is a plate-shaped member that extends along the upper edge of the side panel 21, and the end portion on the side closer to the door panel 11 is the top panel base end portion 31, and the end portion on the far side is the top panel front end portion. It is set to 32.
The top panel 30 has a top panel base end portion 31 rotatably supported about a horizontal axis with respect to the side panel 21. For this reason, a support member 33 is laid between the side panels 21 along the upper edge of the opening 14 of the door panel 11.

As shown in FIG. 6, a hinge 34 is connected to the lower surface side of the supporting member 33, and the opposite side of the hinge 34 is connected to the upper surface of the upper surface panel 30 with the pivot axis of the hinge 34 interposed therebetween.
As a result, the upper surface panel 30 is rotatable about the upper surface panel base end portion 31 near the door panel 11, and the upper surface panel tip end portion 32 distant from the door panel 11 moves vertically at a position lower than the upper surface panel base end portion 31. It can be displaced.

The front panel 40 is a plate-shaped member that extends along the edge of the side panel 21 on the side away from the door panel 11. The lower end is the front panel base end 41, and the upper end is the front. It is the front end 42 of the panel.
The front panel 40 has a front panel base end portion 41 rotatably supported about a horizontal axis with respect to the side panel 21. For this reason, a support member 43 is provided between the side panels 21 so as to connect the lower ends of the edges on the side away from the door panel 11.

As shown in FIG. 7, a hinge 44 is connected to the surface of the supporting member 43 (on the outside of the auxiliary cover 20 and away from the door panel 11), and the opposite side of the hinge 44 with the rotation axis interposed therebetween is the front panel 40. Is connected to the back surface (the surface on the inner side of the auxiliary cover 20 and closer to the door panel 11).
As a result, the front panel 40 is displaceable so that the front panel front end portion 42 at the upper end is closer to the door panel 11 at a position closer to the door panel 11 than the front panel base end portion 41.

In FIG. 4, the upper panel 30 is supported at a position along the upper edge of the side panel 21 to form the upper surface of the auxiliary cover 20, and the front panel 40 extends along the side edge of the side panel 21 remote from the door panel 11. The auxiliary cover 20 is supported to form the front surface of the auxiliary cover 20, whereby the auxiliary cover 20 has a box shape and the extension portion 5E is housed therein.
In the present embodiment, the top panel 30 is rotated about the top panel base end portion 31 so that the top panel tip end portion 32 is displaced downward, and the front panel 40 is centered on the front panel base end portion 41. By rotating the portion 42 in the direction of approaching the door panel 11, it is possible to make the top panel 30 and the front panel 40 into a substantially series of inclined surfaces as shown in FIG.

FIG. 5 shows the auxiliary cover 20 when the processing section shutter device 10 is in the open state.
In FIG. 5, the upper panel 30 is rotated about the upper panel base end portion 31 from the position of FIG. 4 described above such that the upper panel front end portion 32 is displaced downward. It is supported in a state of being an inclined surface that descends toward the top panel tip portion 32.
On the other hand, the front panel 40 is rotated from the position shown in FIG. 4 in the direction in which the front panel front end portion 42 approaches the door panel 11 with the front panel base end portion 41 as the center. It is supported in a state of an inclined surface that descends toward the base end portion 41.
Here, the front panel 40 is supported on the lower surface side of the upper panel 30 at substantially the same angle as the inclination angle of the upper panel 30.
Therefore, even if chips are deposited on the upper surface of the upper panel 30 in the state of FIG. 4, the chips can be dropped along the inclined surface formed by the upper panel 30 and the front panel 40 by setting the state of FIG.

In the auxiliary cover 20 of the present embodiment, the opening / closing operation of the machining partition shutter device 10 (elevation of the door panel 11) is used for switching between the state of FIG. 4 and the state of FIG. 5 described above.
Therefore, in the front panel 40, the front panel tip portion 42 is slidably abutted on the lower surface of the upper panel 30, and the upper panel 30 is supported by the front panel 40, whereby mutual cooperation is achieved. The rotation angle position of the top panel 30 is defined by the rotation angle position of the front panel 40.
Further, the front panel 40 is configured such that the rotational angle position is defined by abutting or sliding contact with the extension portion 5E as the door panel 11 moves up and down.

8 to 10 show changes in the rotational angular positions of the front panel 40 and the top panel 30 due to contact or sliding with the extension portion 5E.
FIG. 8 shows the upper panel 30 and the front panel 40 when the processing section shutter device 10 is in the open state. FIG. 9 shows the upper panel 30 and the front panel 40 during the transition of the processing section shutter device 10 from the open state to the closed state. FIG. 10 shows the upper panel 30 and the front panel 40 in the closed state of the processing section shutter device 10.

Prior to the description of the operations of the upper panel 30 and the front panel 40, a configuration for assisting each operation will be described.
In FIG. 8, in the opened state of the processing section shutter device 10, the lowermost door panel 11 is in a raised state, and the extension portion 5E of the transport device 5 is in a state of being detached downward from the opening portion 14 and the auxiliary cover 20.
As described above, the front panel 40 is rotatably supported around the front panel base end portion 41, and the front panel front end portion 42 is in an upright state (2 in FIG. 8) above the front panel base end portion 41. It is possible to rotate in a direction closer to the door panel 11 from the state of the dashed line).

A locking pin 51 as a stopper is fixed to the inner surface of the side panel 21.
The locking pin 51 is a projecting member that can be engaged with the side edge of the front panel 40, and can lock the front panel 40 when the front panel 40 rotates in a direction close to the door panel 11.
The locking pin 51 restricts the rotation of the front panel 40 in the direction toward the door panel 11 to a predetermined angular position.

A coil spring 52 as a biasing means is stretched between the side panel 21 and the side edge of the front panel 40 near the front panel tip 42.
The front panel 40 is biased by the coil spring 52 so as to rotate in a direction in which the front panel front end portion 42 approaches the door panel 11.
As a result, unless there is another external force, the front panel 40 is rotated by the coil spring 52 toward the door panel 11, and is held in the inclined state locked by the locking pin 51 (the state shown by the solid line in FIG. 8). To be done.

A locking pin 53 as an auxiliary stopper is fixed near the front edge of the inner surface of the side panel 21.
The locking pin 53 is a projecting member that can be engaged with the side edge of the front panel 40, and can lock the front panel 40 when the front panel 40 rotates in a direction away from the door panel 11.
The locking pin 53 restricts the rotation of the front panel 40 in the direction away from the door panel 11 and prevents the front panel 40 from deviating to the outside of the auxiliary cover 20.

  As described above, the upper panel 30 is rotatably supported around the upper panel base end 31, the upper panel 30 is substantially horizontal, and the upper panel tip 32 is slightly lower than the upper panel base 31. It is possible to rotate from a certain flat state (a state indicated by a chain double-dashed line in FIG. 8) to an inclined state in which the top panel front end portion 32 is displaced downward (a state indicated by a solid line in FIG. 8).

Further, as described above, the front panel tip portion 42 is slidably abutted on the lower surface of the upper panel 30 so that the upper panel 30 is supported by the front panel 40. The movement angle position is defined by the rotation angle position of the front panel 40.
That is, when the front panel 40 is in the upright state, the upper panel 30 is supported by the front panel 40 and is in a substantially horizontal state (state of two-dot chain line in FIG. 8). Then, when the front panel 40 is rotated to be in an inclined state, the upper panel 30 is also rotated to be in an inclined state (solid line state in FIG. 8).

  The above-described rotation of the upper panel 30 and the front panel 40 in cooperation with each other is performed by slidably abutting the front panel tip portion 42 on the lower surface of the upper panel 30. In order to perform this operation smoothly, the front panel front end portion 42 is designed to have low friction.

In FIG. 11, the front panel tip portion 42 of the front panel 40 is in a state in which the tip edge is bent and is raised, and the edge is covered with a low-friction resin such as tetrafluoroethylene. 54 is formed.
The front panel front end portion 42 of the front panel 40 is brought into contact with the surface of the upper panel 30 via the slider 54, and the frictional resistance when sliding is small.

In FIG. 11, a cushion 55 made of an elastic material such as butyl rubber sponge is installed at the tip edge of the top panel tip portion 32 of the top panel 30.
In a situation where the top panel 30 abruptly contacts the front panel tip portion 42, the top panel tip portion 32 may collide with the surface of the front panel 40, and the cushion 55 causes an impact sound caused by the collision. Can be eased.

Next, the operation of the upper panel 30 and the front panel 40 from the opened state to the closed state of the processing section shutter device 10 will be described.
In FIG. 8 again, when the processing section shutter device 10 is in the open state, the extension portion 5E of the transport device 5 is in a state of being separated downward from the opening portion 14 and the auxiliary cover 20.
Therefore, each of the front panel 40 and the top panel 30 is in an inclined state, and forms a substantially series of inclined surfaces.

When the processing section shutter device 10 is lowered from the opened state of FIG. 8, the door panel 11 and the auxiliary cover 20 are lowered, and the extension portion 5E of the transport device 5 is introduced from below into the opening 14 and the auxiliary cover 20. .
The front panel 40 is in a slanted state in the opened state, that is, the front panel distal end portion 42 is slanted toward the side closer to the door panel 11 with respect to the front panel base end portion 41, and the extended portion 5E introduced into the inside of the auxiliary cover 20. Has its upper edge abutted on the surface of the front panel 40.
Rollers 5R for conveying the pallet 4 are installed on the upper surface of the conveying device 5, and one of these rollers 5R arranged on the upper edge of the tip of the extension portion 5E is attached to the surface of the front panel 40. Abut.

In FIG. 9, when the auxiliary cover 20 further descends with respect to the extension portion 5E, the roller 5R rolls up and pushes up the front panel 40, and the front panel tip end portion 42 separates from the door panel 11 centering on the front panel base end portion 41. The front panel 40 is rotated in the direction.
By rotating the front panel 40, the top panel 30 is pushed up by the front panel tip portion 42. As a result, the upper panel 30 rotates from the inclined state of FIG. 8 so that the upper panel distal end portion 32 is displaced upward with the upper panel proximal end portion 31 as the center.

In FIG. 10, when the processing section shutter device 10 reaches the closed state, the extension portion 5E of the transport device 5 is housed inside the auxiliary cover 20.
At this time, when the roller 5R pushes the front panel 40, the front panel 40 further rotates to reach an upright state (a state in which the front panel front end portion 42 is above the front panel base end portion 41).
Further, by being lifted by the front panel tip portion 42, the top panel 30 is further rotated to be in a substantially horizontal state (the top panel 30 is substantially horizontal and the top panel tip portion 32 is slightly below the top panel base portion 31). Reach a certain state).

As described above, the auxiliary cover 20 can be moved from the open state of FIG. 8 to the closed state of FIG. 10 through the intermediate state of FIG. 9 by the processing section shutter device 10 being lowered.
On the contrary, by raising the machining section shutter device 10 from the closed state of FIG. 10, it is possible to shift to the open state of FIG. 8 through the intermediate state of FIG. 9.

When processing is performed in the processing section 2, the processing section shutter device 10 is lowered to close the doorway 6E. During processing, the chips fall on the auxiliary cover 20 in the closed state, and the chips are deposited on the upper panel 30 in the substantially horizontal state.
After the processing, when the processing section shutter device 10 is raised, the auxiliary cover 20 shifts from the closed state of FIG. 10 (the upper panel 30 is substantially horizontal) to the opened state of FIG. 8 (the upper panel 30 is inclined). To do. When the open state of FIG. 8 is reached, the front panel 40 supporting the upper panel 30 is locked by the locking pin 51 which is a stopper, and the vibration at the time of collision collides with the upper surface of the front panel distal end 42. It also propagates to the panel 30.
Therefore, the chips accumulated on the upper surface panel 30 collapse due to the propagated vibration and fall from the auxiliary cover 20 along the slope of the front surface panel 40 which is substantially continuous with the upper surface panel 30.

According to this embodiment as described above, the following effects can be obtained.
In the present embodiment, the pallet 4 can be taken in and out by the carrier device 5 through the entrance / exit 6E of the processing section 2.
In the present embodiment, the doorway 6E is closed by lowering the processing section shutter device 10 (door panel 11). When closing the door panel 11, the extension portion 5E of the carrier device 5 is passed through the opening 14 of the door panel 11 and covered with the auxiliary cover 20. In the auxiliary cover 20, the front panel 40 approaches the extension portion 5E as the door panel 11 descends, and eventually comes into contact with the extension portion 5E to push the front panel 40. As the extended portion 5E continues to push while sliding, the front panel 40 rotates to the side away from the door panel 11 and stands upright on the front surface of the auxiliary cover 20 (side away from the door panel 11). Become. By this rotation, the front panel tip portion 42 abuts and slides on the top panel 30, and the front panel tip portion 42 is lifted to rotate the top panel 30, whereby the top panel 30 eventually comes to the top surface of the auxiliary cover 20. It is in a state of being along (a substantially horizontal state).
In this state, chips accompanying the processing in the processing section 2 are deposited on the upper surface panel 30 which is the upper surface of the auxiliary cover 20. No chips are deposited on the extended portion 5E of the transport device 5 covered with the auxiliary cover 20.

After processing in the processing section 2, the processing section shutter device 10 (door panel 11) is lifted to open the doorway 6E. When the door panel 11 rises, the extension portion 5E is displaced downward with respect to the auxiliary cover 20, the position where the extension portion 5E pushes the front panel 40 moves downward, and the front panel 40 rotates so as to approach the door panel 11. . Then, by moving the support position of the upper panel 30 by the front panel tip 42 toward the door panel 11, the upper panel 30 rotates so that the upper panel tip 32 moves downward. As a result, the upper surface panel 30 is in a state (inclined state) that is inclined downward from the upper surface panel base end portion 31 toward the upper surface panel front end portion 32 (toward the side away from the side closer to the door panel 11).
As the top panel 30 tilts, the chips deposited on it slide off. Since the chips are dropped at a time point when the extension portion 5E and the front panel 40 are disengaged from each other, that is, at a relatively early time when the door panel 11 is opened, the chips accumulated on the auxiliary cover 20 can be discharged at a low position.
Therefore, according to the present embodiment, it is possible to prevent the chips accumulated on the auxiliary cover 20 from being scattered over a wide range.

In the present embodiment, since the locking pin 51 as a stopper is provided, the front panel 40 can be moved at a predetermined angle even when the machining partition shutter device 10 (door panel 11) is lifted and the extended portion 5E is separated from the front panel 40. It can be held in a tilted state (the front panel front end portion 42 is tilted toward the side closer to the door panel 11).
As a result, when the door panel 11 descends, the extension portion 5E can reliably perform the operation of pushing the front panel 40. Further, even when a chip sliding off from the top panel 30 is dropped via the surface of the front panel 40, the inclination (similar to the top panel 30) suitable for the chip sliding down can be adjusted.

  In the present embodiment, since the coil spring 52 as the biasing means is provided, when the machining partition shutter device 10 (door panel 11) rises and the extended portion 5E separates from the front panel 40, the front panel 40 is moved to the front panel. The tip 42 can be reliably rotated in the direction in which it approaches the door panel 11, and the operation of rotating the top panel 30 downward can be reliably performed. Further, the front panel 40 can be rotated with respect to the locking pin 51 that is a stopper that restricts the rotation of the front panel 40, and can be reliably held at the angular position restricted by the locking pin 51.

  In the present embodiment, the slider 54 made of low friction resin is provided on the front panel tip portion 42, and the front panel tip portion 42 slides on the upper panel 30 via the slider 54. 11) is lowered and the front panel 40 is pushed by the extension portion 5E, or the door panel 11 is raised and the extension portion 5E is separated from the front panel 40, the top panel 30 accompanying the rotation of the front panel 40. Can be smoothly rotated.

  In the present embodiment, since the cushion 55 that absorbs the impact sound at the time of collision is provided at the top panel front end portion 32, the processing partition shutter device 10 (door panel 11) rises and the extension portion 5E separates from the front panel 40, and the front panel. When the upper panel 30 rotates with the rotation of the upper panel 40, the impact noise can be mitigated even if the upper panel tip portion 32 of the upper panel 30 collides with the surface of the front panel 40.

It should be noted that the present invention is not limited to the above-described embodiments, and modifications and the like within the range in which the object of the present invention can be achieved are included in the present invention.
In the above embodiment, the lower surface side of the upper panel 30 is supported by the front panel tip portion 42, so that the upper panel 30 is rotated in accordance with the rotation of the front panel 40, and the angle of the inclined state of the upper panel 30 is defined. It was Alternatively, another member that engages with a part of the upper panel 30 may be provided to directly restrict the rotation of the upper panel 30. Furthermore, an engaging mechanism or the like may be provided on the rotating shaft of the upper panel 30 to restrict the rotating of the upper panel 30 at a predetermined angle. Whichever configuration is adopted, the front panel tip portion 42 abuts on the lower surface side of the upper panel 30 so that no gap is generated between the upper panel 30 and the front panel 40.

  Although the locking pin 51 is provided as a stopper in the above-described embodiment, any pin or block that projects from the side panel 21 and engages with the front panel 40 can be used, and is formed on the rotating shaft of the front panel 40. It is possible to use a meshing mechanism or the like.

In the above-described embodiment, as the biasing means, the coil spring 52 that is stretched between the front panel 40 and the side panel 21 is provided, but a spiral spring wound around the rotating shaft of the front panel 40 is used. Alternatively, an electromagnetic non-contact urging means or the like may be used.
Furthermore, by adjusting the direction of the urging force (for example, the tension direction of the coil spring 52 from the front panel), the front panel 40 in a state of being separated from the extension portion 5E without the locking pin 51 that is the stopper described above. Can also be held at the desired tilt angle.

In the above-described embodiment, the slider 54 is formed with a coating (liner) on the leading edge with a low friction synthetic resin, but it may be a pad-like member stretched on the surface of the front panel 40, and the slider rolls on the upper panel 30. A roller or the like may be used.
In the above-described embodiment, the butyl rubber sponge is used as the cushion 55, but a pad or liner made of an elastic material having appropriate elasticity and flexibility such as another elastomer material sponge can be used.

  INDUSTRIAL APPLICABILITY The present invention can be used for a machining section shutter device of a machine tool having an automatic pallet changing device.

  DESCRIPTION OF SYMBOLS 1 ... Machine tool, 10 ... Processing partition shutter device, 11 ... Door panel, 14 ... Opening part, 15 ... Flap, 2 ... Processing partition, 20 ... Auxiliary cover, 21 ... Side panel, 3 ... Preparation partition, 30 ... Top panel, 31 ... Top panel base end, 32 ... Top panel tip, 33 ... Support member, 34 ... Hinge, 4 ... Pallet, 40 ... Front panel, 41 ... Front panel base, 42 ... Front panel tip, 43 ... Supporting member, 44 ... Hinge, 5 ... Conveying device, 51 ... Stopping pin as stopper, 52 ... Coil spring as biasing means, 53 ... Locking pin, 54 ... Slider, 55 ... Cushion, 5A ... Preparation section 5B ... Machining section part, 5E ... Extension part, 5R ... Roller, 6 ... Splash guard cover, 6E ... Doorway.

Claims (5)

A door panel that can be moved up and down along a doorway of a machining section of a machine tool; an opening formed at a lower end of the door panel; and an auxiliary cover that covers the opening,
The auxiliary cover is disposed between the pair of side panels extending from the door panel to the processing section, a top panel disposed between the side panels and extending along an upper edge of the side panel, and the side panel. And a front panel extending along an edge distant from the door panel,
The top panel has a top panel base end portion near the door panel rotatably supported about a horizontal axis with respect to the side panel, and a top panel tip end portion distant from the door panel is more than the top panel base end portion. It can be displaced up and down at a low position,
The front panel has a front panel base end portion at a lower end rotatably supported about a horizontal axis with respect to the side panel, and a front panel front end portion at an upper end is more than the front panel base end portion than the door panel. At a position close to the door panel so that the door panel can be displaced away from the door panel, and the front panel front end is slidably abutted on the lower surface of the upper panel. Shutter device. The processing section shutter device according to claim 1,
A machining partition shutter device comprising a stopper for restricting a rotation of the front panel in a direction in which a front end portion of the front panel approaches the door panel to a predetermined angle position. The processing section shutter device according to claim 1 or 2,
A processing partition shutter device comprising: a biasing unit that biases the front panel in a direction in which a front end portion of the front panel approaches the door panel. The processing section shutter device according to any one of claims 1 to 3,
A processing section shutter device having a slider installed at a front end portion of the front panel to reduce sliding resistance with respect to a surface of the upper panel. The processing section shutter device according to any one of claims 1 to 4,
A machining partition shutter device, comprising a cushion that is installed at a front end portion of the top panel and cushions an impact sound when the front panel collides with the surface of the front panel.

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