JP7067006B2 - Machine Tools - Google Patents

Description

The present invention relates to a machine tool for processing a workpiece.

Conventionally, a machine tool includes a machine body and a housing (see, for example, Patent Document 1). The housing (“cover” in Patent Document 1) covers the machine body. The housing is provided with an opening. The door opens and closes the opening.
The machine tool described in Patent Document 1 further includes a limit switch, a dog, and a control device. The limit switch is attached to the peripheral edge of the opening in the housing. The dog is attached to the door. The control device controls the operation of the machine body.

When the door opens, the dog separates from the limit switch. When the door closes, the dog presses the limit switch. If the dog presses the limit switch, the controller determines that the door is closed. When it is determined that the door is closed, the control device activates the machine body. When it is determined that the door is not closed, the controller does not activate the machine body.
Therefore, since the machine body in which the housing and the door are operating is isolated from the operator, the safety of the operator can be ensured.

Japanese Unexamined Patent Publication No. 2009-214214

However, even if, for example, a malicious person removes the dog from the door and presses the limit switch with the removed dog, the control device determines that the door is closed. Then, there is a risk that the machine body will operate even though the door is open.

The present invention has been made in view of such circumstances, and a main object thereof is to provide a machine tool capable of improving safety.

The machine tool according to the present embodiment is detachably attached to one of a housing provided with an opening, a door for opening and closing the opening, and the door and the housing by using screws. In a machine tool provided with a detection member for detecting the opening / closing of a screw, a shielding member fixed to the one or the detection member and shielding the screw so as to hinder the removal of the screw, and the shielding member. A detection unit attached to the other side of the door and the housing and detecting the presence of the detection member when the door closes the opening, and a detection unit provided inside the housing and the detection unit are provided. It is equipped with a machine body that processes the workpiece when the presence of the detection member is detected , and the detection member is detachably attached using one screw, and the other screw is used. A mounting member detachably attached to one of the above members and a holder detachably attached to the other side using a second screw to hold the detection unit are further provided, and the detection unit is further provided. Is larger than the detection member, and one screw is inserted into either the detection member or the mounting member, and a long elongated hole is provided in the first direction. The mounting member and one of the above are inserted with the other screw, and a long hole is provided in a second direction different from the first direction, and the holder and the other are provided. Each of them is characterized in that the second screw is inserted and a long elongated hole is provided in a third direction different from the first direction and the second direction .

The machine tool according to the present embodiment is detachably attached to one of a housing provided with an opening, two doors for opening and closing the opening, and one of the two doors by using screws. In a machine machine provided with a detection member for detecting the opening / closing of one door, a shielding member fixed to the one or the detection member and shielding the screw so as to hinder the removal of the screw. , A detection unit attached to the other of the two doors to detect the presence of the detection member when the two doors close the opening, and a detection unit provided inside the housing to detect the detection. The unit includes a machine body for processing the workpiece when the presence of the detection member is detected, the detection member is detachably attached using one screw, and the other screw is attached. A mounting member detachably attached to the one side using a second screw, and a holder detachably attached to the other side using a second screw and holding the detection unit are further provided. The detection unit is larger than the detection member, and one of the screws is inserted into either the detection member or the mounting member, and a long hole is provided in the first direction. , The mounting member and one of the above are inserted with the other screw, and a long hole is provided in a second direction different from the first direction, and the holder and the holder are provided. One of the other is characterized in that the second screw is inserted and a long hole is provided in a third direction different from the first direction and the second direction. ..

The machine tool according to the present embodiment is characterized in that the shielding member shields both one screw and the other screw.
In the machine tool according to the present embodiment, the door is locked when the detection unit detects the presence of the detection member, and the door is automatically closed when the processing by the machine body is completed. It is characterized by being unlocked.
In the machine tool according to the present embodiment, the two doors are locked when the detection unit detects the presence of the detection member, and the two doors are locked when the processing by the machine body is completed. Is characterized by being automatically unlocked.

The machine tool according to the present embodiment is characterized in that the shielding member is fixed to one of the above or the detection member by using a one-way screw.

The machine tool according to the present embodiment is characterized in that the detection member and the detection unit are provided inside the housing, respectively.

The machine tool according to the present embodiment is characterized in that the screw is made of chrome molybdenum steel.
In the machine tool according to the present embodiment, the detection member and the detection unit are provided inside the housing, respectively, and the detection member and the detection unit are attached to the upper corner of the door. It is characterized in that it is a portion corresponding to the upper corner portion of the housing.
In the machine tool according to the present embodiment, the detection member and the detection unit are provided inside the housing, respectively, and the detection member and the detection unit are attached at positions above the two doors, respectively. It is characterized by being a corner.

In the present embodiment, a detection member is attached to one of the door and the housing by using a screw. Alternatively, a detection member is attached to one of the two doors using a screw. Hereinafter, the object to which the detection member is attached is referred to as a first object.

In order to remove the detection member from the first object, it is necessary to remove the screw. However, the shielding member that shields the screw hinders the removal of the screw. Moreover, the shielding member is fixed to the first object or the detection member. Therefore, the shielding member cannot be removed. Therefore, it is possible to prevent the detection member from being removed from the first object.
As a result, it is possible to prevent erroneous detection of opening and closing of the door caused by a malicious person removing the detection member from the first object. Therefore, it is possible to prevent the inconvenience that the machine tool operates even though the door is open. Therefore, safety can be improved.

In the present embodiment, the shielding member is fixed by using a one-way screw. Therefore, the work of fixing the shielding member is simple.

In the present embodiment, the detection member is attached to the first object via the attachment member.
The shielding member shields both the screw that attaches the detection member to the mounting member and the screw that attaches the mounting member to the first object. Therefore, it is not necessary to use a separate shielding member for each screw. Therefore, the number of shielding members can be reduced.

In the present embodiment, even after the detection member is attached to the first object, for example, the manufacturer of the machine tool can loosen the screw before the shielding member is fixed. The manufacturer can adjust the relative position of the detection member with respect to the first object in one or more directions when the screw is loosened. The manufacturer fixes the shielding member after the position of the detection member is determined. Therefore, the position of the detection member can be easily adjusted during the manufacture of the machine tool.
On the other hand, for example, it is possible to prevent the detection member from being removed after the machine tool is shipped from the factory.

In the present embodiment, the detection unit is attached to the other side of the door and the housing by using the second screw. Alternatively, the detector is attached to the other of the two doors using a second screw. Hereinafter, the object to which the detection unit is attached is referred to as a second object.
The detection member is attached to the first object via the attachment member.
Before fixing the shielding member, the relative position of the detecting member with respect to the mounting member can be adjusted in the first direction along the elongated hole by loosening one screw. Also, by loosening the other screws, the relative position of the mounting member with respect to the first object can be adjusted in the second direction along the elongated hole. As a result of the above, the relative position of the detection member with respect to the first object can be adjusted in two different directions.

Further, by loosening the second screw, the relative position of the detection unit with respect to the second object can be adjusted in the third direction along the elongated hole.
Often, the detection unit is larger than the detection member. The configuration for adjusting the position of the large detector in multiple directions is complicated. However, the configuration for adjusting the position of the large detection unit in one direction is simple. Further, the configuration for adjusting the small detection member in two directions is simple.
By adjusting the relative positions of the detection member and the detection unit, the detection member and the detection unit can be aligned with each other.

The machine tool processes the workpiece when the detection unit detects the presence of the detection member. When the detection unit detects the presence of the detection member, the door (or two doors) always closes the opening. This is because the detection member cannot be removed from the first object. Therefore, it is possible to prevent the inconvenience that the machine tool operates even though the door is open. Therefore, safety can be improved.

In this embodiment, the detection member is attached to the first object using a screw made of chrome molybdenum steel. Since the chrome molybdenum steel screw has higher mechanical strength than the stainless steel screw, the detection member can be firmly attached to the first object.

When the machine tool of the present embodiment is used, safety can be improved.

It is a perspective view which shows the machine tool which concerns on Embodiment 1. FIG. It is a front view which shows the machine tool. It is a block diagram which shows the structure of the control system of a machine tool. It is a perspective view which shows the detection member and the detection part (when a door is open) provided in a machine tool. It is a perspective view which shows the detection member and the detection part (when a door is closed) provided in a machine tool. It is a perspective view which shows the attachment member provided with the machine tool. It is a perspective view which shows the detection member, the detection part, and the shielding member (when a door is open) provided in a machine tool. It is a perspective view which shows the detection member, the detection part, and the shielding member (when a door is closed) provided in a machine tool. It is a block diagram which shows the structure of the control system of a machine tool (when a door is open). It is a block diagram which shows the structure of the control system of a machine tool (when a door is closed). It is a perspective view which shows the machine tool (when the door is closed) which concerns on Embodiment 2. It is a perspective view which shows the machine tool (when the door is open).

Hereinafter, the present invention will be described in detail with reference to the drawings showing the embodiments thereof. In the following description, the up and down, front and back, and left and right indicated by arrows in the figure are used.

Embodiment 1.
FIG. 1 is a perspective view showing a machine tool according to the first embodiment.
FIG. 2 is a front view showing a machine tool.
FIG. 3 is a block diagram showing a configuration of a control system of a machine tool.
In the figure, 1 is a machine tool, and the machine tool 1 includes a base 10, a machine body 11, a housing 12, and a control device 13.
The base 10 is installed on the floor. The machine body 11 is provided on the upper part of the base 10.

The machine body 11 includes a table 111, an X-axis motor 112, a Y-axis motor 113, a spindle 114, a Z-axis motor 115, a spindle motor 116, a tool changer 117, and a changeover motor 118.
The worker places the work (workpiece) on the table 111. The table 111 can be moved in the front-back and left-right directions. The X-axis motor 112 and the Y-axis motor 113 move the table 111 in the front-back and left-right directions.

The spindle 114 is located above the table 111. At the lower end of the spindle 114, there is a tool mounting portion. The spindle 114 is movable in the vertical direction. The Z-axis motor 115 moves the main shaft 114 in the vertical direction. As a result, the tool mounted on the spindle 114 is brought into contact with and separated from the work placed on the table 111. The spindle motor 116 rotates a tool mounted on the spindle 114. The tool mounted on the spindle 114 performs processing such as cutting or drilling on the work by contacting the work while rotating.

The tool changer 117 holds a plurality of tools so that they can rotate and move. When the spindle 114 is raised, the tool changer 117 removes the tool mounted on the spindle 114 from the spindle 114 and holds it. The tool changer 117 mounts one of the tools held by the tool changer 117 on the main shaft 114 when the main shaft 114 is lowered. The exchange motor 118 feeds the required tool to the tool exchange position by rotating and moving a plurality of tools held by the tool exchange device 117.

The housing 12 has a box shape. The housing 12 is provided on the upper part of the base 10 so as to cover the machine body 11. The housing 12 has a front wall 121, a rear wall 122, a left wall 123, a right wall 124, and a top wall. However, in FIGS. 1 and 2, the illustration of the top wall of the housing 12 is omitted. The front wall 121, the rear wall 122, the left wall 123, the right wall 124, and the top wall of the housing 12 cover the machine body 11 from the front side, the rear side, the left side, the right side, and the upper side.
A rectangular opening 125 is provided in the center of the front wall 121. A door 2 is attached to the front wall 121 to open and close the opening 125. In FIG. 1, the door 2 is open. In FIG. 2, the door 2 is closed.

The door 2 is a single sliding door and has a left door 21 and a right door 22. The left door 21 and the right door 22 each have a rectangular shape and slide in the left-right direction in conjunction with each other. A handle 23 is provided on the right side of the front surface of the right door 22.
When the operator grasps the handle 23 and pulls it to the left side, the right door 22 and the left door 21 move to the left side and open. Through the opening 125, the worker goes in and out of the housing 12. An operator who has entered the inside of the housing 12 places the work on, for example, a table 111.
When the operator grasps the handle 23 and pulls it to the right side, the right door 22 and the left door 21 move to the right side and close.

In order to detect the opening and closing of the door 2, the machine tool 1 includes a detection member 3 and a detection unit 4. In the present embodiment, the detection member 3 is attached to the door 2 (first object), and the detection unit 4 is attached to the housing 12 (second object). In order to attach the detection member 3 to the door 2, the machine tool 1 further includes an attachment member 5, and in order to attach the detection unit 4 to the housing 12, the machine tool 1 further includes a holder 6 (see a figure to be described later). 4 to 8). In order to prevent the detection member 3 from being removed from the door 2, the machine tool 1 further includes a shielding member 7 (see FIGS. 8 and 9 described later).

4 and 5 are perspective views showing a detection member 3 and a detection unit 4 included in the machine tool 1.
FIG. 6 is a perspective view showing a mounting member 5 included in the machine tool 1.
7 and 8 are perspective views showing a detection member 3, a detection unit 4, and a shielding member 7 included in the machine tool 1.
9 and 10 are block diagrams showing the configuration of the control system of the machine tool 1. The door 2 and the detection member 3 are also schematically shown in FIGS. 9 and 10.
In FIGS. 4, 7, and 9, the door 2 is open. In FIGS. 5, 8 and 10, the door 2 is closed.

The detection member 3 has an insertion portion 31 and a mounting portion 32.
Each of the insertion portion 31 and the attachment portion 32 is a rectangular flat plate long in one direction.
The insertion portion 31 projects in a direction in which the longitudinal direction of the insertion portion 31 is orthogonal to the longitudinal direction of the attachment portion 32, flush with the attachment portion 32, and protrudes from the long side portion of the attachment portion 32. A rectangular through hole 311 is provided in the central portion of the insertion portion 31 in the longitudinal direction.
Two elongated holes 321 and 321 are arranged side by side in the longitudinal direction in the mounting portion 32. Each elongated hole 321 is long in the longitudinal direction of the mounting portion 32.

The detection unit 4 includes a housing 41, a limit switch 42, a lock member 43, and a solenoid actuator 44.
The housing 41 has a box shape and houses a limit switch 42, a lock member 43, and a solenoid actuator 44. A slit 411 is provided on the peripheral wall of the housing 41. The slit 411 communicates inside and outside the housing 41. The insertion portion 31 of the detection member 3 can be inserted into the housing 41 through the slit 411.

Normally, the limit switch 42 is off. The limit switch 42 is turned on only while the limit switch 42 is under the pressing force.
The housing 41 houses a cam and a spring (not shown). Normally, the spring urges the cam in a direction away from the limit switch 42. When the detection member 3 that has entered the housing 41 through the slit 411 comes into contact with the cam, the cam approaches the limit switch 42 against the urging force of the spring and applies a pressing force to the limit switch 42. The detection member 3 that has entered the housing 41 may directly apply a pressing force to the limit switch 42.

The lock member 43 enters a position (hereinafter referred to as a lock position) that intersects the insertion / removal path of the detection member 3 inside the housing 41. When the detection member 3 has entered the housing 41, the lock member 43 that has entered the lock position penetrates the through hole 311 of the detection member 3. While the lock member 43 penetrates the through hole 311, the insertion portion 31 of the detection member 3 cannot be pulled out from the housing 41.
When the lock member 43 exits from the lock position, the lock member 43 comes out of the through hole 311 of the detection member 3, so that the insertion portion 31 of the detection member 3 can be pulled out from the housing 41.

The lock member 43 is connected to the plunger 44a of the solenoid actuator 44. Normally, the solenoid actuator 44 is in an excited state. The solenoid actuator 44 in the non-excited state keeps the lock member 43 in the locked position by the protrusion of the plunger 44a. The solenoid actuator 44 in the excited state keeps the lock member 43 in a state of being retracted from the locked position by the immersion of the plunger.
The solenoid actuator 44 is not limited to the configuration in which the lock member 43 is moved forward and backward. For example, the electric cylinder may advance or retreat the lock member 43.

9 and 10 schematically show the insertion / removal of the detection member 3 fixed to the door 2 into the housing 41, the on / off of the limit switch 42 accompanying the insertion / removal of the detection member 3, and the advance / retreat of the lock member 43. Is shown.
As the detection member 3 and the detection unit 4, for example, a dedicated actuator and a safety switch provided in a commercially available safety switch device can be used.

A support base 24 is provided on the inner surface of the door 2. The support base 24 is located near the upper end of the right side portion of the right door 22. It is desirable that the support base 24 is in a high position so that the operator who has entered the inside of the housing 12 cannot reach it.
The support base 24 of the present embodiment has three support plates 241, 242, 243. The support plate 241 has a rectangular plate shape that is long in one direction. The support plate 242 has a plate shape and protrudes from one long side of the support plate 241 in a direction orthogonal to the support plate 241. The support plate 243 has a plate shape and protrudes from the other long side of the support plate 241 in the same direction as the support plate 242.

The support base 24 is fixed to the right door 22 so that the longitudinal direction of the support plate 241 is along the vertical direction. The support plate 241 is separated from the right door 22 and is parallel to the right door 22. For fixing the support base 24, for example, the tips of the support plates 242 and 243 are welded to the inner surface of the right door 22. The support base 24 cannot be removed from the right door 22.
Two round holes 244 and 244 are arranged side by side in the vertical direction on the support plate 241. Two round holes (not shown) are arranged side by side in the vertical direction on the support plate 242.

The mounting member 5 is an L-shaped bracket. The mounting member 5 has mounting portions 51 and 52. The mounting portions 51 and 52 each form a rectangular plate that is long in one direction. The longitudinal directions of the mounting portions 51 and 52 are parallel to each other. The mounting portion 51 projects from the long side portion of the mounting portion 52 in a direction orthogonal to the mounting portion 52.
Two round holes 511 and 511 are arranged side by side in the mounting portion 51 in the longitudinal direction of the mounting portion 51.
Two elongated holes 521 and 521 are arranged side by side in the mounting portion 52 in the longitudinal direction of the mounting portion 52. Each elongated hole 521 is long in the lateral direction of the mounting portion 52.

The manufacturer detachably attaches the detection member 3 to the attachment member 5 using two screws 81, 81 and two nuts (not shown). Specifically, the manufacturer aligns the elongated holes 321, 321 of the mounting portion 32 of the detection member 3 with the round holes 511, 511 of the mounting portion 51 of the mounting member 5, and each elongated hole 321 and round. Insert the screw 81 into the hole 511. Next, the manufacturer fastens the mounting portions 32 and 51 together. The screw 81 is a single screw, and the long hole 321 is a long hole long in the first direction.

The manufacturer detachably attaches the mounting member 5 to the support base 24 using two screws 82, 82 and two nuts (not shown). Specifically, the manufacturer aligns the long holes 521 and 521 of the mounting portion 52 of the mounting member 5 with the two round holes of the support plate 242 of the support base 24, and each long hole 521 and the support plate 242. Insert the screw 82 into the round hole of. The manufacturer then co-fastens the mounting portion 52 and the support plate 242. The screw 82 is another screw, and the long hole 321 is a long hole long in the second direction.

When the mounting member 5 is mounted on the support base 24, the longitudinal direction of the elongated hole 521 is along the front-rear direction. Even after the mounting member 5 is mounted, the screws 82 can be loosened or removed until the shielding member 7 is fixed as described later. By removing the screws 82 and 82, the mounting member 5 can be removed from the support base 24. By loosening the screws 82 and 82, the relative position of the mounting portion 52 with respect to the support plate 242 can be adjusted along the elongated hole 521. Therefore, the door 2 of the detection member 3 integrated with the mounting member 5 can be adjusted. The position relative to the can be adjusted in the front-back direction.
The mounting portion 52 may have two round holes, and the support plate 242 may have elongated holes 521 and 521.

When the detection member 3 is attached to the attachment member 5 attached to the support base 24, the longitudinal direction of the elongated hole 321 is along the vertical direction. Even after the detection member 3 is attached, the screw 81 can be loosened or removed until the shielding member 7 is fixed. If the screws 81 and 81 are removed, the detection member 3 can be removed from the mounting member 5. By loosening the screws 81 and 81, the relative position of the mounting portion 32 with respect to the mounting portion 51 can be adjusted along the elongated hole 321. Therefore, the relative position of the detecting member 3 with respect to the mounting member 5 can be adjusted. It can be adjusted in the vertical direction.
The mounting portion 32 may have round holes 511,511, and the mounting portion 51 may have elongated holes 321,321.

By adjusting the relative position of the mounting member 5 with respect to the door 2 in the front-rear direction and adjusting the relative position of the detection member 3 with respect to the mounting member 5 in the vertical direction, the detection member 3 with respect to the door 2 The relative position can be adjusted up, down, front and back. Since the detection member 3 is interposed between the door 2 and the detection member 3, the configuration for adjusting the relative position of the detection member 3 with respect to the door 2 in two directions is simple.
Further, by appropriately changing the design of the mounting member 5, the common detection members 3 and 3 can be mounted on the doors 2 and 2 having different specifications.

If the screws 81 and 81 are removed, the detection member 3 can be removed from the door 2. By removing the screws 82 and 82, the detection member 3 can be removed from the door 2 together with the mounting member 5. That is, the detection member 3 is detachably attached to the door 2 by using the screws 81, 81, 82, 82.

The shielding member 7 has two shielding portions 71 and 72 and a mounting portion 73. The shielding portions 71 and 72 and the mounting portions 73 each form a rectangular plate long in one direction. The shielding portion 71 projects from one long side portion of the shielding portion 72 in a direction orthogonal to the shielding portion 72. The mounting portion 73 projects from the other long side portion of the shielding portion 72 in a direction opposite to that of the shielding portion 71. The longitudinal directions of the shielding portions 71 and 72 and the mounting portions 73 are parallel to each other.
Two round holes are arranged side by side in the mounting portion 73 in the longitudinal direction of the mounting portion 73.

The manufacturer secures the shielding member 7 to the support 24 using two one-way screws 80, 80 and two nuts (not shown). Specifically, the manufacturer makes the shielding portions 71 and 72 face the mounting portions 51 and 52 of the mounting member 5, and supports the two round holes of the mounting portion 73 of the shielding member 7 and the support base 24. Align the round holes 244 and 244 of the plate 241. Next, the manufacturer inserts the one-way screw 80 into the round hole and the round hole 244 of the aligned mounting portion 73. The manufacturer then co-fastens the mounting portion 73 and the support plate 241. The shielding member 7 cannot be removed from the support base 24.

When the shielding member 7 is fixed to the support base 24 in this way, the shielding portion 71 shields the screw heads of the screws 81 and 81, and the shielding portion 72 shields the screw heads of the screws 82 and 82, respectively. The shielding portion 71 hinders the removal of the screw 81 by preventing the tool for removing the screw 81 from coming into contact with the screw head of the screw 81. Similarly, the shielding portion 72 hinders the removal of the screw 82 by preventing the tool for removing the screw 82 from coming into contact with the screw 82.

Until the shielding member 7 is fixed as described above, the relative position of the detection member 3 with respect to the door 2 can be adjusted in the vertical direction.
Since the shielding member 7 shields all the screws 81, 81, 82, 82, it is not necessary to individually shield the screws 81, 81, 82, 82. Therefore, the number of shielding members 7 can be reduced.

When the one-way screw 80 is used, the shielding member 7 can be easily fixed. However, the shielding member 7 may be fixed to the support base 24 by riveting, welding, adhesion, or the like.
Further, the shielding member 7 may be fixed to the detection member 3 or the mounting member 5.

A support base 14 is provided on the inner surface of the front wall 121 of the housing 12. The support base 14 is located near the upper end of the right side of the opening 125. It is desirable that the support base 14 is in a high position so that the operator who has entered the inside of the housing 12 cannot reach it.
The support base 14 of the present embodiment has a plate shape, and is fixed to the inner surface of the front wall 121 so that one side of the support base 14 faces upward. The support base 14 cannot be removed from the front wall 121.
The support base 14 is provided with two round holes (not shown).
The detection unit 4 is placed on the upper surface of the support base 14 so that the slit 411 faces to the left.

The holder 6 has three covering portions 61 to 63 and two mounting portions 64, 64.
Each of the covering portions 61 to 63 has a rectangular plate shape. Each of the covering portions 62 and 63 protrudes from the covering portion 61 in a direction orthogonal to the covering portion 61. The covering portion 62 is provided on the long side portion of the covering portion 61, and the covering portion 63 is provided on the short side portion of the covering portion 61. The covering portions 61 to 63 cover the detection portion 4 from the upper side, the rear side, and the right side, respectively. The holder 6 holds the detection unit 4 so as to sandwich the detection unit 4 between the covering portion 61 and the support base 14 and between the covering portion 62 and the front wall 121.
The mounting portions 64, 64 project from the tips of the covering portions 62, 63 along the support base 14. Each mounting portion 64 is provided with a long hole 641 long in the left-right direction.

The manufacturer detachably attaches the holder 6 to the support base 14 using two screws 83, 83 and two nuts (not shown). Specifically, the manufacturer aligns the long holes 641 and 641 of the mounting portion 64 of the holder 6 with the two round holes of the support base 14, and screws the long holes 641 and the round holes of the support base 14 into the round holes. Insert 83. Next, the manufacturer fastens the mounting portion 64 and the support base 14 together. The screw 83 is a second screw, and the elongated hole 641 is an elongated hole long in the third direction.

The screw 83 can be loosened and removed even after the holder 6 has been attached. By removing the screws 83 and 83, the holder 6 can be removed from the support base 14. By loosening the screws 83 and 83, the relative position of the mounting portion 64 with respect to the support base 14 can be adjusted along the elongated hole 641. As a result, the relative position of the detection unit 4 held by the holder 6 with respect to the housing 12 can be adjusted in the left-right direction.
The mounting portion 64 may have a round hole, and the support plate 242 may have an elongated hole 641.

The manufacturer adjusts the position of the detection member 3 in the vertical and front-back directions, and adjusts the position of the detection unit 4 in the left-right direction to align the detection member 3 and the detection unit 4.
Since the detection unit 4 is larger than the detection member 3, the configuration for adjusting the position of the detection unit 4 in two directions becomes complicated. However, the configuration for adjusting the position of the detection unit 4 in one direction is simple. Further, the configuration for adjusting the detection member 3 in two directions is simple.

The position of the detection member 3 may be adjustable in one direction, and the position of the detection unit 4 may be adjustable in two directions.
Further, the position of the detection member 3 may be adjustable in three directions. In this case, it is not necessary to make the position of the detection unit 4 adjustable. However, the configuration for adjusting the position of the detection member 3 in three directions is complicated. Therefore, it is most advantageous that the position of the detection member 3 can be adjusted in two directions and the position of the detection unit 4 can be adjusted in one direction.

It is desirable that the screws 81 to 83 are each made of chrome molybdenum steel. Screws 81 to 83 made of chrome molybdenum steel have higher mechanical strength than screws made of stainless steel. Therefore, the detection member 3 can be firmly attached to the door 2, and the detection unit 4 can be firmly attached to the housing 12.
The one-way screw 80 is preferably made of chrome molybdenum steel, but may be made of stainless steel, for example. The stainless steel one-way screw 80 is easily available.

The control device 13 is provided on the outer surface of the rear wall 122 of the housing 12.
The control device 13 includes a control unit 131 having a CPU, a temporary storage unit 132 using a volatile memory, and a storage unit 133 using a non-volatile memory (see FIG. 3). The control unit 131 is connected to the temporary storage unit 132 and the storage unit 133 via a bus. The storage unit 133 stores a computer program for controlling the operation of the machine tool 1. The control unit 131 uses the temporary storage unit 132 as a work area, and controls the operation of the machine tool 1 according to the computer program stored in the storage unit 133.

The control device 13 or the machine body 11 includes a motor driver (not shown) that individually drives the X-axis motor 112, the Y-axis motor 113, the Z-axis motor 115, the spindle motor 116, and the replacement motor 118, respectively. The motor driver receives a control signal and drives each motor included in the machine body 11 according to the received control signal.

The control unit 131 controls the operation of the X-axis motor 112 by outputting a control signal to the motor driver of the X-axis motor 112. Similarly, the control unit 131 controls the operations of the Y-axis motor 113, the Z-axis motor 115, the spindle motor 116, and the replacement motor 118, respectively. When the control unit 131 outputs a control signal, the motor operates. When the control unit 131 does not output a control signal, the stopped motor does not operate, and the operating motor stops.
As a result of the above, the machine main body 11 adjusts the position of the work in the front-back and left-right directions, processes the work using a tool, and replaces the tool.

The detection unit 4 is connected to the control device 13 via the cable 45. The cable 45 includes a signal line connecting the limit switch 42 of the detection unit 4 and the solenoid actuator 44 to the control unit 131 of the control device 13.

When the door 2 is closed, the insertion portion 31 of the detection member 3 enters the housing 41 of the detection portion 4. As a result, the limit switch 42 is turned on.
When the limit switch 42 is turned on, the control unit 131 ends the excitation of the solenoid actuator 44. Then, since the lock member 43 penetrates the through hole 311 of the detection member 3, the door 2 is locked.

An operation panel 15 is provided on the front wall 121 of the housing 12. The operation panel 15 is located on the right side of the opening 125. In FIGS. 9 and 10, the operation panel 15 is not shown.
When the machine main body 11 is to start machining the work, the operator gives a machining start command to the control unit 131 by operating the operation panel 15.
If the machining start command has not been received, the control unit 131 does not output a control signal.
Upon receiving the machining start command, the control unit 131 determines whether or not the limit switch 42 is on.

When the limit switch 42 is on, the door 2 is closed, so that it is safe even if the machine body 11 operates. Therefore, the control unit 131 outputs a control signal. Therefore, the machine body 11 operates to process the work.
On the other hand, when the limit switch 42 is off, the door 2 is open, so it is dangerous if the machine body 11 operates. Therefore, the control unit 131 does not output the control signal. Therefore, the machine body 11 does not operate and does not process the work.

When opening the locked door 2, the operator gives an unlock command to the control unit 131 by operating the operation panel 15. When the unlock command is received, the control unit 131 determines whether or not a control signal is output. When the control signal is not output, the machine body 11 is not operating, so the control unit 131 excites the solenoid actuator 44.
When the control signal is output, the machine body 11 is operating, so the control unit 131 excites the solenoid actuator 44 after finishing the output of the control signal.

When the solenoid actuator 44 is in the excited state, the lock member 43 comes out of the through hole 311 of the detection member 3, so that the door 2 is unlocked.
After unlocking the door 2, the operator opens the door 2.
When the door 2 is opened, the insertion portion 31 of the detection member 3 comes out of the housing 41 of the detection portion 4. As a result, the limit switch 42 is turned off.
The control unit 131 may automatically excite the solenoid actuator 44 when the machining of the work is completed. When the control unit 131 automatically excites the solenoid actuator 44, the operator can open the door 2 without operating the operation panel 15.

In the case of the machine tool 1 as described above, in order to remove the detection member 3 from the door 2, it is necessary to remove at least one of the screws 81, 81 and the screws 82, 82. However, the shielding member 7 hinders the removal of the screws 81 and 82. Moreover, the shielding member 7 is fixed to the door 2. Therefore, the shielding member 7 cannot be removed. Therefore, it is possible to prevent the detection member 3 from being removed from the door 2.

The detection unit 4 detects the presence of the detection member 3 in the housing 41 when the door 2 closes the opening 125 of the housing 12. That is, the detection unit 4 detects the closing / opening of the door 2 by detecting the presence / absence of the detection member 3 in the housing 41.
The machine body 11 processes the work when the detection unit 4 detects the presence of the detection member 3. When the detection unit 4 detects the presence of the detection member 3, the door 2 always closes the opening 125 of the housing 41. Therefore, it is possible to prevent the inconvenience that the machine body 11 operates even though the door 2 is open. Therefore, safety can be improved.

The manufacturer of the machine tool loosens the screws 81, 81 or the screws 82, 82 even after the detection member 3 is attached to the door 2 but before the shielding member 7 is fixed, and the detection member 3 for the door 2 is used. The relative position can be adjusted. The manufacturer fixes the shielding member 7 after the position of the detecting member 3 is determined. Therefore, the position of the detection member 3 can be easily adjusted during the manufacture of the machine tool 1.
On the other hand, it is possible to prevent the detection member 3 from being removed after the machine tool 1 is shipped from the factory.

The machine tool 1 is not limited to the configuration in which the detection member 3 is attached to the door 2 and the detection unit 4 is attached to the housing 12. The detection member 3 may be attached to the housing 12, and the detection unit 4 may be attached to the door 2.
Further, the detection member 3 and the detection unit 4 are attached to the peripheral edge of the inspection opening provided on the left wall 123 (or the right wall 124) of the housing 12 and the door for opening and closing the inspection opening. You may.
The control device 13 may include a housing provided with an opening and a door for opening and closing the opening of the housing. The housing of the control device 13 accommodates the control unit 131, the temporary storage unit 132, and the like. In this case, the detection member 3 and the detection unit 4 may be attached to the peripheral edge portion and the door of the opening of the control device 13.
Further, a plurality of doors may open and close the opening 125. In this case, the detection member 3 may be attached to each door, and the detection members 4, 4, ... Corresponding to the detection members 3, 3, ... may be attached to the peripheral edge of the opening 125. Alternatively, the detection unit 4 may be attached to each door, and the detection members 3, 3, ... Corresponding to the detection units 4, 4, ... May be attached to the peripheral edge of the opening 125.

The door 2 is not limited to a sliding door that slides in a straight line. The door 2 may be a sliding door that slides in a curved shape.
The door 2 is not limited to a sliding door. The door 2 may be, for example, a hinged door or a roll-up shutter.

The machine tool 1 may include a shielding member that shields the screws 83, 83 so as to hinder the removal of the screws 83, 83 related to the detection unit 4. In this case, it is possible to prevent a malicious person from removing the detection unit 4.
However, even if the detection unit 4 can be removed, there is no possibility that the machine body 11 will operate even though the door 2 is open. This is because the cable 45 is connected to the detection unit 4, so that even if the detection unit 4 is removed, it cannot be carried to the detection member 3 attached to the door 2.

Embodiment 2.
The machine tool 1 of the present embodiment has substantially the same configuration as the machine tool 1 of the first embodiment. Hereinafter, the differences from the first embodiment will be described, and the same components as those of the first embodiment are designated by the same reference numerals and the description thereof will be omitted.

11 and 12 are perspective views showing the machine tool 1 according to the second embodiment. In FIGS. 11 and 12, the top wall 126 of the housing 12 is shown.
In the present embodiment, the left door 25 and the right door 26 are attached to the front wall 121 in order to open and close the opening 125. In FIG. 11, the left door 25 and the right door 26 are closed. In FIG. 12, the left door 25 and the right door 26 are open.

The left door 25 and the right door 26 are both sliding doors (sliding doors). The left door 25 and the right door 26 each have a rectangular shape and slide in the left-right direction. A handle 251 is provided on the left side of the front surface of the left door 25. A handle 261 is provided on the right side of the front surface of the right door 26.
When the operator grasps the handle 251 and pulls it to the left side, the left door 25 moves to the left side and opens. When the operator grasps the handle 251 and pulls it to the right side, the left door 25 moves to the right side and closes. Similarly, when the operator grasps the handle 261 and pulls it to the right side, the right door 26 moves to the right side and opens. When the operator grasps the handle 261 and pulls it to the left side, the right door 26 moves to the left side and closes.
When the left door 25 and the right door 26 close the opening 125, the right side portion of the left door 25 and the left side portion of the right door 26 come into contact with each other.

In the present embodiment, the detection member 3 is attached to the left door 25 (first object), and the detection unit 4 is attached to the right door 26 (second object).
The support base 24 is provided on the inner surface of the left door 25. The support base 24 is located near the upper end of the right side portion of the left door 25.
The support base 14 is provided on the inner surface of the right door 26. The support base 14 is located near the upper end of the left side portion of the right door 26.

The machine tool 1 as described above has the same function and effect as the machine tool 1 of the first embodiment.
The left door 25 and the right door 26 may be, for example, two double doors with double doors.

The embodiments disclosed this time should be considered to be exemplary in all respects and not restrictive. The scope of the present invention is not intended to have the above-mentioned meaning, but is intended to include the meaning equivalent to the scope of claims and all modifications within the scope of claims.

1 Machine tool 12 Housing 125 Opening 2 Door 25 Left door (one of the two doors)
26 Right door (the other of the two doors)
3 Detection member 321 Long hole (long hole long in the first direction)
4 Detection unit 5 Mounting member 521 Long hole (long hole long in the second direction)
6 Holder 641 Long hole (long hole long in the third direction)
7 Shielding member 80 One-way screw 81 Screw (one screw)
82 screws (other screws)
83 screws (second screw)

Claims (10)

A housing with an opening and
A door that opens and closes the opening,
In a machine tool that is detachably attached to one of the door and the housing by using a screw and is provided with a detection member for detecting the opening / closing of the door.
A shielding member fixed to the one or the detection member and shielding the screw so as to hinder the removal of the screw.
A detection unit attached to the other side of the door and the housing and detecting the presence of the detection member when the door closes the opening.
It is provided inside the housing and includes a machine body for processing the workpiece when the detection unit detects the presence of the detection member.
A mounting member to which the detection member is detachably attached using one screw and detachably attached to one of the other screws.
It is further provided with a holder that is detachably attached to the other side using a second screw and holds the detection unit.
The detection unit is larger than the detection member and has a larger size.
One of the screws is inserted into either the detection member or the mounting member, and a long hole is provided in the first direction.
The mounting member and one of the above have the other screw inserted therein, and a long elongated hole is provided in a second direction different from the first direction.
The second screw is inserted into either the holder or the other, and a long hole is provided in a third direction different from the first direction and the second direction. A machine tool that features. A housing with an opening and
Two doors that open and close the opening,
In a machine tool that is detachably attached to one of the two doors using a screw and is provided with a detection member for detecting the opening / closing of the two doors.
A shielding member fixed to the one or the detection member and shielding the screw so as to hinder the removal of the screw.
A detection unit attached to the other of the two doors and detecting the presence of the detection member when the two doors close the opening.
It is provided inside the housing and includes a machine body for processing the workpiece when the detection unit detects the presence of the detection member.
A mounting member to which the detection member is detachably attached using one screw and detachably attached to one of the other screws.
It is further provided with a holder that is detachably attached to the other side using a second screw and holds the detection unit.
The detection unit is larger than the detection member and has a larger size.
One of the screws is inserted into either the detection member or the mounting member, and a long hole is provided in the first direction.
The mounting member and one of the above have the other screw inserted therein, and a long elongated hole is provided in a second direction different from the first direction.
The second screw is inserted into either the holder or the other, and a long hole is provided in a third direction different from the first direction and the second direction. A machine tool that features. The machine tool according to claim 1 or 2, wherein the shielding member shields both one screw and the other screw. When the detection unit detects the presence of the detection member, the door is locked.
The machine tool according to claim 1 , wherein the door is automatically unlocked when the processing by the machine body is completed. When the detection unit detects the presence of the detection member, the two doors are locked.
The machine tool according to claim 2 , wherein the two doors are automatically unlocked when the processing by the machine body is completed. The machine tool according to any one of claims 1 to 5 , wherein the shielding member is fixed to one of the members or the detection member using a one-way screw. The machine tool according to any one of claims 1 to 6 , wherein the detection member and the detection unit are provided inside the housing, respectively. The machine tool according to any one of claims 1 to 7 , wherein the screw is made of chrome molybdenum steel. The detection member and the detection unit are provided inside the housing, respectively.
The machine tool according to claim 1, wherein the detection member and the detection unit are attached at positions corresponding to the upper corner portion of the door and the upper corner portion of the housing. The detection member and the detection unit are provided inside the housing, respectively.
The machine tool according to claim 2, wherein the detection member and the detection unit are attached at the upper corners of each of the two doors.

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