JP7084842B2 - Machining compartment shutter device - Google Patents

Description

The present invention relates to a machining compartment 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 set up adjacent to a machining section facing the spindle, and a plurality of pallets can be conveyed between each. Then, at the same time as processing the work placed on one of a plurality of pallets, the preparatory work (setup work) for placing the work on another pallet is performed in parallel to improve work efficiency. Is planned.
A splash guard cover or the like surrounding the machine tool is installed in the machine tool processing section in order to prevent chips and coolant from scattering around when the work is machined. An opening / closing type processing section shutter is installed at the entrance / exit facing the preparation section of the guard cover (see Patent Document 1).

In a machine tool having a machining section shutter, the pallets can be exchanged between the machining section and the preparation section by opening the shutter. On the other hand, by closing the shutter, the chips and coolant scattered from the processing section can be blocked, and the pallets and workpieces in the preparation section can be protected from these.
As the processing section shutter, an elevating panel door that does not require a rail on the floor surface is suitable. In the elevating type processing section shutter, the doorway is opened by pulling it upward, and the doorway is closed by lowering it downward. In the elevating type processing section shutter, when height is required, a multi-stage panel in which a plurality of stages are connected vertically is used.

Japanese Unexamined Patent Publication No. 11-58171

In a machine tool having a processing section and a preparation section, a pallet transfer mechanism is installed between each. 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 the elements of these transport mechanisms are equipped with a processing section shutter from the preparation section. It is configured to continuously extend to the processing section through the entrance and exit.
Since the continuous direction of the transport mechanism is the crossing direction with the machining compartment shutter, the machining compartment shutter interferes with the continuous portion such as the guide rail of the transport mechanism in the closed state. Therefore, a machine tool has a machine tool in which an opening through which a continuous portion such as a guide rail of a transport mechanism is inserted is formed 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 machining area through the opening even when the machining area shutter is closed. Then, the extension portion extending into the processing section of the transport mechanism is covered with an auxiliary cover to protect it.

In the above-mentioned processing section shutter with an auxiliary cover, chips scattered in the processing section are deposited on the upper surface of the box-shaped auxiliary cover and fall due to vibration when the shutter is opened. Even if the chip falls while the shutter is low, there is no problem with the amount of the chip falling to the surroundings. However, when the shutter rises and the chip falls from a high position, the chip is scattered over a wide range, such as on the transport mechanism covered with the auxiliary cover, the pallet, or the work.
Of these, the inserts attached to the guide rail 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.
If there is a chip that does not fall while being deposited on the auxiliary cover, it may be caught between the guard cover and the ceiling when the shutter is raised, resulting in damage to the guard cover and the auxiliary cover. Therefore, it is also required to reliably drop the chips deposited on the auxiliary cover.

An object of the present invention is to provide a machined compartment shutter device capable of preventing chips deposited on an auxiliary cover from being scattered over a wide area.

The machined compartment shutter device of the present invention has a door panel that can be raised and lowered along the entrance and exit of the machined compartment 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 arranged between a pair of side panels extending from the door panel to the processing section, a top panel arranged between the side panels and extending along the upper edge of the side panels, and the side panels. With a front panel extending along an edge away from the door panel, the top panel is rotatable about an axis horizontal to the side panel at the base end of the top panel close to the door panel. The front end of the upper surface panel, which is supported by the door panel and is separated from the door panel, can be displaced up and down at a position lower than the base end of the upper surface panel. It is rotatably supported around a horizontal axis, and the tip of the front panel at the upper end can be displaced so as to be 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 against the lower surface of the top 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 transport device through the entrance / exit.
In the present invention, the doorway is closed by lowering the door panel. When closing the door panel, the extension of the transport device is passed through the opening of the door panel and covered with an auxiliary cover. In the auxiliary cover, as the door panel descends, the front panel approaches the extension portion, and eventually comes into contact with the front panel, and the front panel is pushed by the extension portion. By continuing to push the extension while sliding, the front panel rotates to the side away from the door panel and stands upright on the front surface of the auxiliary cover (the side away from the door panel). By this rotation, the tip of the front panel abuts on the top panel and slides, and by lifting it at the tip of the front panel, the top panel rotates, and eventually the top panel is in a state along the top surface of the auxiliary cover. ..
In this state, the chips associated with the processing in the processing section are deposited on the upper surface panel which is the upper surface of the auxiliary cover. Chip deposition does not occur on the extension of the transport device covered by the auxiliary cover.

After processing in the processing section, the door panel is raised to open the doorway. 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 upper surface panel by the front end portion of the front panel moves toward the door panel, so that the upper surface panel rotates so that the tip end portion of the upper surface panel moves downward. As a result, the upper surface panel is tilted downward from the base end portion of the upper surface panel toward the tip end portion of the upper surface panel (from the side closer to the door panel to the side away from the door panel).
When the top panel is tilted, the chips deposited on it slide off. Since the chip falls when the extension portion and the front panel come out of contact with each other, that is, at a relatively early stage of the door panel opening operation, the chip deposited on the auxiliary cover can be ejected at a low position.
Therefore, according to the present invention, it is possible to prevent the chips deposited on the auxiliary cover from being scattered over a wide area.

The tilt angle of the top panel in the tilted state can be defined by contact with the tip of the front panel. For example, by supporting the lower surface side of the upper surface panel with the tip end portion of the front panel, the rotation of the upper surface panel can be restricted, thereby defining the inclination angle of the upper surface panel. Alternatively, another member or the like that engages with a part of the upper surface panel may be provided to directly regulate the rotation of the upper surface panel. Further, an engaging mechanism or the like may be provided on the rotation shaft of the upper surface panel to regulate the rotation of the upper surface panel at a predetermined angle.
By holding the front panel in a substantially continuous inclined state with the top panel, the chips that slide off 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 or the like that engages with a part of the front panel may be provided to restrict the rotation.

In the processing section shutter device of the present invention, it is preferable to have a stopper that restricts the rotation of the front panel in a direction in which the tip end portion of the front panel is close to the door panel to a predetermined angle position.

In the present invention as described above, the front panel can be held in an inclined state of a predetermined angle even when the door panel is raised and the extension portion is separated from the front panel. As a result, when the door panel is lowered, the extension portion can reliably push the front panel. Further, even when the chips that slide off the top panel are ejected via the surface of the front panel, the inclination can be adjusted to be suitable for the chips to slide off (similar to the inclination of the top panel).
As the stopper, a pin or a block protruding from the side panel and engaging with the front panel can be used, or a meshing mechanism formed on the rotation shaft of the front panel can be used.

In the processing section shutter device of the present invention, it is preferable to have an urging means for urging the front panel in a direction in which the tip end portion of the front panel is close to the door panel.

In the present invention as described above, when the door panel is raised and the extension portion is separated from the front panel, the front panel can be reliably rotated so that the front end portion of the front panel is close to the door panel, and the top panel is directed downward. It is possible to reliably perform the operation of rotating the door. 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 angle position restricted by the stopper.
As the urging means, a coil spring spanned between the front panel and the side panel can be used, or a coil spring wound around the rotation shaft of the front panel may be used, and electromagnetic springs may be used. A non-contact urging means or the like may be used.
Further, by adjusting the direction of the urging force (for example, the tension direction of the coil spring from the front panel), the front panel separated from the extension portion can be held at a desired tilt angle without the above-mentioned stopper or the like. You can also do it.

In the processing section shutter device of the present invention, it is preferable to have a slider installed at the tip of the front panel to reduce sliding resistance with respect to the surface of the top panel.

In the present invention as described above, since the tip of the front panel slides on the top panel via 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 and is pushed from the front panel. When the extension portion is separated, the top panel can be smoothly rotated along with the rotation of the front panel.
As the slider, a pad or liner made of a low-friction synthetic resin can be used, or a roller that rolls on the upper panel may be used.

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

In the present invention as described above, when the door panel is raised, the extension portion is separated from the front panel, and the upper surface panel is rotated with the rotation of the front panel, the tip portion of the upper surface panel of the upper surface panel is on the surface of the front panel. Even in the case of a collision, the impact sound can be alleviated.
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 capable of preventing chips deposited on an auxiliary cover from being scattered over a wide area.

FIG. 3 is a perspective view showing a main part of a machine tool in which a machining compartment shutter device according to an embodiment of the present invention is installed. The perspective view which shows the machined partition shutter device in the closed state of the said embodiment. The perspective view which shows the processing section shutter device in the open state of the said embodiment. The perspective view which shows the auxiliary cover in the closed state of the said embodiment. The perspective view which shows the auxiliary cover in the open state of the said embodiment. An enlarged cross-sectional view showing a support portion of the top panel of the embodiment. An enlarged cross-sectional view showing a support portion of the front panel of the embodiment. The cross-sectional view which shows the top panel and the front panel in the open state of the said embodiment. FIG. 3 is a cross-sectional view showing a top panel and a front panel in an intermediate state of the embodiment. The cross-sectional view which shows the top panel and the front panel in the closed state of the said embodiment. An enlarged cross-sectional view showing the slider and cushion of the embodiment.

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

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

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

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

2 and 3 show a machining compartment shutter device 10.
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 (a state in which the doorway 6E is opened) of the processing section shutter device 10.

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

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

A box-shaped auxiliary cover 20 that covers the opening 14 is installed on the lowermost door panel 11 on the side facing the processing section 2.
The lower surface side of the box-shaped auxiliary cover 20 is 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 inside 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 end edge of the door panel 11 and the lower end edge of the auxiliary cover 20. When the processing section shutter device 10 is lowered to the lower limit, a slight gap remains between the processing section shutter device 10 and the floor surface. However, by closing the gap with the flap 15, it is possible to prevent the chip from leaking.

4 and 5 show the auxiliary cover 20.
FIG. 4 shows an 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, the top panel 30 is installed along the upper edge of the side panel 21, and the 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 surface panel 30 is opened, and the extension portion 5E can be introduced from below.

The upper surface panel 30 is a plate-shaped member extending along the upper edge of the side panel 21, and the end portion on the side closer to the door panel 11 is the upper surface panel base end portion 31, and the end portion on the far side is the upper surface panel tip portion. It is said to be 32.
In the upper surface panel 30, the upper surface panel base end portion 31 is rotatably supported around an axis horizontal to the side surface panel 21. For this purpose, a support member 33 is hung between the side panels 21 along the upper edge of the opening 14 of the door panel 11.

As shown in FIG. 6, the hinge 34 is connected to the lower surface side of the support member 33, and the opposite side across the rotation shaft of the hinge 34 is connected to the upper surface of the upper surface panel 30.
As a result, the upper surface panel 30 can rotate around the upper surface panel base end portion 31 close to the door panel 11, and the upper surface panel tip portion 32 away from the door panel 11 moves up and down 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 extending 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 said to be the panel tip portion 42.
In the front panel 40, the front panel base end portion 41 is rotatably supported around an axis horizontal to the side panel 21. For this purpose, a support member 43 is hung between the side panels 21 so as to connect the lower ends of the end edges on the side away from the door panel 11.

As shown in FIG. 7, the hinge 44 is connected to the surface of the support member 43 (the outside of the auxiliary cover 20 and the side away from the door panel 11), and the front panel 40 is on the opposite side of the rotation shaft of the hinge 44. Is connected to the back surface (the side on the inner side of the auxiliary cover 20 and the side closer to the door panel 11).
As a result, the front panel 40 can be displaced so that the front panel tip 42 at the upper end is closer to the door panel 11 than the front panel base end 41 and is separated from the door panel 11.

In FIG. 4, the top 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 is along the side edge of the side panel 21 far from the door panel 11. It was supported to form the front surface of the auxiliary cover 20, whereby the auxiliary cover 20 was box-shaped and contained the extension portion 5E inside.
In the present embodiment, the upper surface panel 30 rotates around the upper surface panel base end portion 31 so that the upper surface panel tip portion 32 is displaced downward, and the front panel 40 rotates around the front panel base end portion 41 at the front panel tip. By rotating the portion 42 in a direction close to the door panel 11, it is possible to form the upper surface panel 30 and the front panel 40 into a substantially series of inclined surfaces as shown in FIG.

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

In the auxiliary cover 20 of the present embodiment, the opening / closing operation (up / down of the door panel 11) of the processing section shutter device 10 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 end portion 42 is slidably abutted against the lower surface of the upper surface panel 30, and the upper surface panel 30 is supported by the front panel 40 so as to cooperate with each other. 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 rotation angle position is defined by the contact or sliding with the extension portion 5E accompanying the raising and lowering of the door panel 11.

8 to 10 show changes in the rotation angle 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 top panel 30 and the front panel 40 when the processing section shutter device 10 is open. FIG. 9 shows a top panel 30 and a front panel 40 in the process of shifting the processing section shutter device 10 from the open state to the closed state. FIG. 10 shows a top panel 30 and a front panel 40 in a closed state of the processing section shutter device 10.

Prior to the description of the operation of the top panel 30 and the front panel 40, a configuration for assisting each operation will be described.
In FIG. 8, in the open 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 14 and the auxiliary cover 20.
As described above, the front panel 40 is rotatably supported around the front panel base end 41, and the front panel tip 42 is in an upright state above the front panel base end 41 (2 in FIG. 8). It is rotatable in a direction close to the door panel 11 from the state of the dotted 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 protruding member that can be engaged with the side edge of the front panel 40, and can be locked 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 approaching the door panel 11 to a predetermined angle position.

A coil spring 52 as an urging means is hung between the side panel 21 and the side edge of the front panel 40 near the front end portion 42 of the front panel.
The coil spring 52 urges the front panel 40 so that the front panel tip 42 rotates in a direction approaching the door panel 11.
As a result, the front panel 40 is rotated in a direction approaching the door panel 11 by the coil spring 52 and held in an inclined state (solid line state in FIG. 8) locked by the locking pin 51 unless there is another external force. Will be done.

A locking pin 53 as an auxiliary stopper is fixed in the vicinity of the leading edge of the inner surface of the side panel 21.
The locking pin 53 is a protruding member that can be engaged with the side edge of the front panel 40, and can be locked 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 surface panel 30 is rotatably supported around the upper surface panel base end portion 31, the upper surface panel 30 is substantially horizontal, and the upper surface panel tip portion 32 is slightly below the upper surface panel base end portion 31. It is rotatable from a certain flat state (state of the two-dot chain line in FIG. 8) to an inclined state in which the tip portion 32 of the upper surface panel is displaced downward (state of the solid line in FIG. 8).

Further, as described above, the front panel tip portion 42 is slidably abutted against the lower surface of the upper surface panel 30, and the upper surface panel 30 is supported by the front panel 40. The moving 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 top panel 30 is supported by the front panel 40 and is in a substantially horizontal state (the state of the two-dot chain line in FIG. 8). Then, when the front panel 40 rotates and becomes an inclined state, the upper surface panel 30 also rotates and becomes an inclined state (the state of the solid line in FIG. 8).

Such coordinated rotation of the upper surface panel 30 and the front panel 40 is performed by slidably contacting the front end portion 42 with the lower surface of the upper surface panel 30. In order to smoothly perform this operation, the friction of the front panel tip portion 42 is reduced.

In FIG. 11, the front panel tip 42 of the front panel 40 is in a state where the tip edge is bent and stands up, and the edge thereof is covered with a low friction resin such as ethylene tetrafluoride, and the slider is covered by this coating. 54 is formed.
The front panel tip portion 42 of the front panel 40 is in contact with the surface of the top 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 a butyl rubber sponge is installed on the tip edge of the top panel tip portion 32 of the top panel 30.
In a situation where the top panel 30 suddenly comes into contact with the front panel tip 42, the top panel tip 32 may collide with the surface of the front panel 40, but the cushion 55 may cause an impact sound due to the collision. Can be relaxed.

Next, the operation of the upper surface panel 30 and the front panel 40 from the open state to the closed state of the processing section shutter device 10 will be described.
Again, in FIG. 8, in the open state of the processing section shutter device 10, the extension portion 5E of the transfer device 5 is in a state of being detached downward from the opening 14 and the auxiliary cover 20.
Therefore, the front panel 40 and the top panel 30 are each in an inclined state, forming a substantially series of inclined surfaces.

When the processing section shutter device 10 is lowered from the open state of FIG. 8, the door panel 11 and the auxiliary cover 20 are lowered, and the extension portion 5E of the transfer device 5 is introduced from below into the opening 14 and the auxiliary cover 20. ..
The front panel 40 is in an inclined state in the opened state, that is, the front panel tip portion 42 is inclined toward the side closer to the door panel 11 with respect to the front panel base end portion 41, and the extension portion 5E introduced into the auxiliary cover 20. The upper edge of the tip of the front panel 40 is in contact with the surface of the front panel 40.
Rollers 5R for transporting the pallet 4 are installed on the upper surface of the transport device 5, and among these rollers 5R, those arranged on the upper edge of the tip of the extension portion 5E are placed on the surface of the front panel 40. Be abutted.

In FIG. 9, when the auxiliary cover 20 is further lowered with respect to the extension portion 5E, the roller 5R rolls and pushes up the front panel 40, and the front panel tip 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 surface panel 30 rotates from the tilted state of FIG. 8 so that the upper surface panel tip portion 32 is displaced upward with the upper surface panel base 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 transfer 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 tip portion 42 is above the front panel base end portion 41).
Further, by being lifted by the front panel tip 42, the top panel 30 is further rotated and is in a substantially horizontal state (the top panel 30 is substantially horizontal and the top panel tip 32 is slightly below the top panel base end 31). A certain state) is reached.

As a result, the auxiliary cover 20 can shift from the open state of FIG. 8 to the closed state of FIG. 9 through the intermediate state of FIG. 9 by lowering the processing section shutter device 10.
On the contrary, by raising the processing 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.

When processing is performed in the processing section 2, the machining section shutter device 10 is lowered to close the entrance / exit 6E. During processing, the chips fall on the auxiliary cover 20 in the closed state, and the chips are deposited on the top panel 30 in a substantially horizontal state.
After machining, when the machining section shutter device 10 is raised, the auxiliary cover 20 shifts from the closed state (top panel 30 is substantially horizontal) in FIG. 10 to the open state (top panel 30 is tilted) in FIG. do. When the open state of FIG. 8 is reached, the front panel 40 supporting the top panel 30 is locked by the locking pin 51 which is a stopper, and the vibration at the time of collision is transmitted to the top surface via the front panel tip portion 42. It also propagates to the panel 30.
Therefore, the chips deposited on the upper surface panel 30 collapse due to the propagated vibration and fall from the auxiliary cover 20 along the inclination of the front panel 40 substantially continuous with the upper surface panel 30.

According to the present embodiment as described above, the effects described below can be obtained.
In the present embodiment, the pallet 4 can be taken in and out by the transfer 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 transport device 5 is passed through the opening 14 of the door panel 11 and is 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 front panel 40 to be pushed by the extension portion 5E. By continuing to push the extension portion 5E while sliding, the front panel 40 rotates to the side away from the door panel 11 and stands upright on the front surface (the side away from the door panel 11) of the auxiliary cover 20 (standing state). Become. Due to this rotation, the front panel tip portion 42 abuts on the top panel 30 and slides, and by lifting the front panel tip portion 42, the top panel 30 rotates, and eventually the top panel 30 is placed on the upper surface of the auxiliary cover 20. It is considered to be in a along state (substantially horizontal state).
In this state, the chips associated with 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. Chip deposition does not occur in the extension portion 5E of the transport device 5 covered with the auxiliary cover 20.

After machining in the machining section 2, the doorway 6E is opened by raising the machining section shutter device 10 (door panel 11). 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, the support position of the upper surface panel 30 by the front panel tip portion 42 moves toward the door panel 11, so that the upper surface panel 30 rotates so that the upper surface panel tip portion 32 moves downward. As a result, the upper surface panel 30 is in a state of being inclined downward (inclined state) from the upper surface panel base end portion 31 toward the upper surface panel tip portion 32 (toward a side away from the side closer to the door panel 11).
When the top panel 30 is tilted, the chips deposited on it slide off. Since the chip falls at the time when the extension portion 5E and the front panel 40 are out of contact with each other, that is, at a relatively early stage of the operation of opening the door panel 11, the chip deposited 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 deposited on the auxiliary cover 20 from being scattered over a wide area.

In the present embodiment, since the locking pin 51 as a stopper is provided, the front panel 40 can be set at a predetermined angle even when the processing section shutter device 10 (door panel 11) is raised and the extension portion 5E is separated from the front panel 40. It can be held in an inclined state (a state in which the front panel tip portion 42 is inclined toward the side closer to the door panel 11).
As a result, when the door panel 11 is lowered, the extension portion 5E can reliably push the front panel 40. Further, even when the chip slipping off from the top panel 30 is dropped through the surface of the front panel 40, the inclination can be adjusted to be suitable for the chip to slide down (similar to the inclination of the top panel 30).

In the present embodiment, since the coil spring 52 is provided as the urging means, when the processing section shutter device 10 (door panel 11) rises and the extension portion 5E separates from the front panel 40, the front panel 40 is changed to the front panel. The tip portion 42 can be reliably rotated in a direction close to 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, which is a stopper that restricts the rotation of the front panel 40, and can be reliably held at an angle position restricted by the locking pin 51.

In the present embodiment, a slider 54 made of low friction resin is provided on the front panel tip 42 so that the front panel tip 42 slides on the top panel 30 via the slider 54, so that the processing section shutter device 10 (door panel) The upper surface panel 30 accompanying the rotation of the front panel 40 when the front panel 40 is pushed by the extension portion 5E when the front panel 40 is lowered or when the door panel 11 is raised and the extension portion 5E is separated from the front panel 40. Can be smoothly rotated.

In the present embodiment, since the cushion 55 for alleviating the impact sound at the time of collision is provided at the tip portion 32 of the upper surface panel, the processing section shutter device 10 (door panel 11) rises and the extension portion 5E separates from the front panel 40, and the front panel Even when the upper surface panel tip portion 32 of the upper surface panel 30 collides with the surface of the front panel 40 when the upper surface panel 30 rotates with the rotation of the 40, the impact sound can be alleviated.

The present invention is not limited to the above-described embodiment, and modifications to the extent that the object of the present invention can be achieved are included in the present invention.
In the above embodiment, by supporting the lower surface side of the upper surface panel 30 with the front panel tip portion 42, the upper surface panel 30 is rotated according to the rotation of the front panel 40, and the angle of the inclined state of the upper surface panel 30 is defined. rice field. Alternatively, another member or the like that engages with a part of the upper surface panel 30 may be provided to directly regulate the rotation of the upper surface panel 30. Further, an engaging mechanism or the like may be provided on the rotation shaft of the upper surface panel 30, and the rotation of the upper surface panel 30 may be restricted by a predetermined angle. Regardless of which configuration is adopted, the front panel tip portion 42 abuts on the lower surface side of the upper surface panel 30 so that no gap is formed between the upper surface panel 30 and the front panel 40.

In the above embodiment, the locking pin 51 is provided as a stopper, but any pin or block protruding from the side panel 21 and engaging with the front panel 40 can be used, and the locking pin 51 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 embodiment, as the urging means, the coil spring 52 spanned between the front panel 40 and the side panel 21 is provided, but a coil spring wound around the rotating shaft of the front panel 40 is used. Alternatively, a non-contact urging means by electromagnetic wave may be used.
Further, 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 even without the locking pin 51 which is the stopper described above. Can also be held at the desired tilt angle.

In the above embodiment, the slider 54 is made of a low-friction synthetic resin to form a coating (liner) at the tip edge, but may be in the form of a pad stretched on the surface of the front panel 40, and may be rolled onto the top panel 30. You may use a roller or the like.
In the above embodiment, a 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 a sponge made of another elastomer material, can be used.

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

1 ... Machine tool, 10 ... Machining compartment shutter device, 11 ... Door panel, 14 ... Opening, 15 ... Flap, 2 ... Machining compartment, 20 ... Auxiliary cover, 21 ... Side panel, 3 ... Preparation compartment, 30 ... Top panel, 31 ... Top panel base end, 32 ... Top panel tip, 33 ... Support member, 34 ... Hinge, 4 ... Palette, 40 ... Front panel, 41 ... Front panel base end, 42 ... Front panel tip, 43 ... Support member, 44 ... hinge, 5 ... transfer device, 51 ... stopper locking pin, 52 ... urging means coil spring, 53 ... locking pin, 54 ... slider, 55 ... cushion, 5A ... preparation compartment 5, 5B ... Processing section part, 5E ... Extension part, 5R ... Roller, 6 ... Splash guard cover, 6E ... Doorway.

Claims (5)

It has a door panel that can be raised and lowered along the entrance and exit of the machine tool processing section, an opening formed at the lower end of the door panel, and an auxiliary cover that covers the opening.
The auxiliary cover is arranged between a pair of side panels extending from the door panel to the processing section, a top panel arranged between the side panels and extending along the upper edge of the side panels, and the side panels. With a front panel extending along the edge away from the door panel,
In the upper surface panel, the upper surface panel base end portion close to the door panel is rotatably supported around an axis horizontal to the side panel, and the upper surface panel tip portion away from the door panel is from the upper surface panel base end portion. It can be displaced up and down at a low position,
In the front panel, the front panel base end portion at the lower end is rotatably supported around an axis horizontal to the side panel, and the front panel tip portion at the upper end is the door panel rather than the front panel base end portion. The processing section is characterized in that it can be displaced so as to be close to and separated from the door panel at a position close to the door panel, and the tip end portion of the front panel is slidably abutted on the lower surface of the top panel. Shutter device. In the processing section shutter device according to claim 1,
A processing section shutter device, wherein the front end portion of the front panel has a stopper that restricts the rotation of the front panel in a direction close to the door panel at a predetermined angle position. In the processing section shutter device according to claim 1 or 2.
A processing section shutter device, wherein the front end portion of the front panel has an urging means for urging the front panel in a direction close to the door panel. In the processing section shutter device according to any one of claims 1 to 3.
A processing section shutter device installed at a tip end portion of the front panel and having a slider for relaxing sliding resistance with respect to the surface of the top panel. In the processing section shutter device according to any one of claims 1 to 4.
A machined compartment shutter device installed at the tip of the upper surface panel and having a cushion for alleviating an impact sound at the time of a collision with the surface of the front panel.

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