JP2019058991A - Machine tool - Google Patents

Abstract

To provide a machine tool which enables improvement of safety.SOLUTION: A machine tool according to an embodiment includes: a housing provided with an opening; a door which opens or closes the opening; and a detection member 3 which is detachably attached to one of the door and the housing by using screws and is used to detect opening or closing of the door. The machine tool includes a shield member 7 which is fixed to the one or the detection member 3 and shields the screws so as to hinder removal of the screws.SELECTED DRAWING: Figure 7

Description

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

Conventionally, a machine tool is provided with a machine body and a housing (see, for example, Patent Document 1). A housing ("cover" in Patent Document 1) covers the machine body. The housing is provided with an opening. The door opens and closes.
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 periphery of the opening in the housing. The dog is attached to the door. The controller controls the operation of the machine body.

When the door opens, the dog moves away from the limit switch. If the door closes, the dog presses the limit switch. If the dog is pushing the limit switch, the controller determines that the door is closed. When it is determined that the door is closed, the control device operates the machine body. When it is determined that the door is not closed, the control device does not operate the machine body.
Therefore, since the housing and the door isolate the working machine body from the worker, the safety of the worker can be secured.

JP, 2009-214214, A

  However, for example, even when a malicious person removes a 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 possibility that the machine body operates 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 using a screw. A machine tool including a detection member for detecting the opening and closing of the screw, the shielding member being fixed to the one or the detection member and shielding the screw so as to inhibit the removal of the screw; It is characterized by

  The machine tool according to the present embodiment is detachably attached to a housing provided with an opening, two doors for opening and closing the opening, and one of the two doors using screws. A machine tool including a detection member for detecting opening and closing of two doors, a shielding member fixed to the one or the detection member and shielding the screw so as to inhibit removal of the screw; It is characterized by having.

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

  In the machine tool according to the present embodiment, the detecting member is detachably attached using one of the screws, and the attaching member detachably attached to the one using the other screws is further added. The shielding member is characterized by shielding both the one screw and the other screw.

  In the machine tool according to the present embodiment, when the detection member is loosened, the relative position of the detection member with respect to the one can be adjusted in one or more directions. , Attached to the one side.

  In the machine tool according to the present embodiment, the detection member is detachably attached using one of the screws, and the attachment member detachably attached to the one using the other screws; A detection unit attached to the other of the door and the housing, and detecting the presence of the detection member when the door closes the opening, and the other detachably attachable using a second screw And a holder for holding the detection unit, one of the screws is inserted in any of the detection member and the attachment member, in a first direction. A long elongated hole is provided, and another screw is inserted in either the mounting member or the one, and a long elongated hole is provided in a second direction different from the first direction. The second holder for the holder and the other There Yes inserted, Yes and long elongated hole is provided in the third direction, and wherein processing the workpiece when the detecting unit has detected the presence of the detection member.

  In the machine tool according to the present embodiment, the detection member is detachably attached using one of the screws, and the attachment member detachably attached to the one using the other screws; A detection unit attached to the other of the two doors, which detects the presence of the detection member when the two doors close the opening, and the other is detachably attachable using a second screw. And a holder for holding the detection unit, one of the screws is inserted in any of the detection member and the attachment member, in a first direction. A long elongated hole is provided, and another screw is inserted in either the mounting member or the one, and a long elongated hole is provided in a second direction different from the first direction. The second holder for the holder and the other There Yes inserted, Yes and long elongated hole is provided in the third direction, and wherein processing the workpiece when the detecting unit has detected the presence of the detection member.

  The machine tool according to the present embodiment is characterized in that the screw is made of chromium molybdenum steel.

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

It is necessary to remove the screw in order to remove the detection member from the first object. However, a shielding member that shields the screw inhibits the removal of the screw. Moreover, the shielding member is fixed to the first object or the detection member. Therefore, the shielding member can not be removed. Therefore, removal of the detecting member from the first object can be prevented.
As a result, it is possible to prevent a false detection of opening and closing of the door caused by a malicious person removing the detection member from the first object. Therefore, the disadvantage that the machine tool operates even when the door is open can be prevented. Therefore, the safety can be improved.

  In the present embodiment, the shielding member is fixed 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 the screw that attaches the detecting member to the mounting member as well as the screw that attaches the mounting member to the first object. Thus, there is no need to use separate shielding members 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, the manufacturer of the machine tool can loosen the screw, for example, before fixing the shielding member. The manufacturer can adjust the relative position of the detection member 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 detecting member is determined. Therefore, the position of the detection member can be easily adjusted during manufacture of the machine tool.
On the other hand, for example, removal of the detection member can be prevented after shipment of the machine tool from the factory.

In the present embodiment, the detection unit is attached to the other of the door and the housing using a second screw. Alternatively, the detection unit is attached to the other of the two doors using a second screw. Hereinafter, an object attached with a detection unit 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 detection member relative 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 to the first object can be adjusted in the second direction along the slot. 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 to the second object can be adjusted in the third direction along the elongated hole.
Often the detector is larger than the detection member. The configuration for adjusting the position of the large detection unit in a plurality of directions is complicated. However, the configuration for adjusting the position of the large detection unit in one direction is simple. Furthermore, the configuration for adjusting the small detection member in two directions is simple.
By adjusting the relative position of the detection member and the detection unit, the detection member and the detection unit can be aligned.

  The machine tool processes the workpiece when the detection unit detects the presence of the detection member. If the detection unit detects the presence of the detection member, the door (or two doors) necessarily closes the opening. The reason is that the detection member can not be removed from the first object. Therefore, the disadvantage that the machine tool operates even when the door is open can be prevented. Therefore, the safety can be improved.

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

  In the case of the machine tool of the present embodiment, the safety can be improved.

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

  Hereinafter, the present invention will be described in detail based on the drawings showing the embodiments. In the following description, upper and lower, front and rear, and left and right indicated by arrows in the drawings 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 the configuration of a control system of the machine tool.
In the drawings, reference numeral 1 denotes a machine tool, and the machine tool 1 includes a base 10, a machine main body 11, a housing 12, and a control device 13.
The base 10 is installed on the floor. A machine main body 11 is provided on the top of the base 10.

The machine main body 11 includes a table 111, an X-axis motor 112, a Y-axis motor 113, a main shaft 114, a Z-axis motor 115, a main shaft motor 116, a tool changer 117, and a change motor 118.
The operator places a work (workpiece) on the table 111. The table 111 is movable in the front, rear, left, and right directions. The X-axis motor 112 and the Y-axis motor 113 move the table 111 in the front-rear and left-right directions.

  The main spindle 114 is located above the table 111. At the lower end of the spindle 114 is a tool mounting portion. The main shaft 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 main spindle 114 contacts and separates 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 main spindle 114 applies processing such as cutting or drilling to the workpiece by contacting the workpiece while rotating.

  The tool changer 117 rotatably holds a plurality of tools. The tool changer 117 removes the tool mounted on the main shaft 114 from the main shaft 114 and holds it when the main shaft 114 is lifted. 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 tools to the tool exchange position by rotationally moving the plurality of tools held by the tool changer 117.

The housing 12 has a box shape. The housing 12 is provided on the top 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 FIG.1 and FIG.2, illustration of the top wall of the housing | casing 12 is abbreviate | 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.
At the central portion of the front wall 121, a rectangular opening 125 is provided. 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. Each of the left door 21 and the right door 22 has a rectangular shape, and slides in the left-right direction in conjunction with each other. A handle 23 is provided on the right side of the front of the right door 22.
When the operator grips the handle 23 and pulls it to the left, the right door 22 and the left door 21 move to the left and open. The operator enters and exits the housing 12 through the opening 125. The operator who has entered the inside of the housing 12 places a work on the table 111, for example.
When the operator grips the handle 23 and pulls it to the right, the right door 22 and the left door 21 move to the right and close.

  In order to detect 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 the attachment member 5, and in order to attach the detection unit 4 to the housing 12, the machine tool 1 further includes the holder 6 (see FIG. 4 to 8). In order to prevent removal of the detection member 3 from the door 2, the machine tool 1 further includes a shielding member 7 (see FIGS. 8 and 9 described later).

FIG.4 and FIG.5 is a perspective view which shows the member 3 for a detection and the detection part 4 with which the machine tool 1 is provided.
FIG. 6 is a perspective view showing the mounting member 5 provided in the machine tool 1.
7 and 8 are perspective views showing the detection member 3, the detection unit 4, and the shielding member 7 provided 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 an attachment portion 32.
Each of the insertion portion 31 and the attachment portion 32 is a rectangular flat plate which is long in one direction.
The insertion portion 31 projects from the long side of the attachment portion 32 flush with the attachment portion 32 in a direction in which the longitudinal direction of the insertion portion 31 is orthogonal to the longitudinal direction of the attachment portion 32. A rectangular through hole 311 is provided at the center of the insertion portion 31 in the longitudinal direction.
In the attachment portion 32, two long holes 321 and 321 are arranged in parallel in the longitudinal direction. Each long 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 accommodates the limit switch 42, the lock member 43, and the solenoid actuator 44. A slit 411 is provided in the peripheral wall of the housing 41. The slits 411 communicate the inside and the outside of 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 receives a pressing force.
The housing 41 accommodates a cam and a spring (not shown). The spring normally biases the cam away from the limit switch 42. When the detection member 3 entering the housing 41 through the slit 411 contacts the cam, the cam approaches the limit switch 42 against the biasing force of the spring and applies a pressing force to the limit switch 42. The detection member 3 entering 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 can not be extracted from the housing 41.
When the lock member 43 withdraws from the lock position, the lock member 43 gets out of the through hole 311 of the detection member 3, so that the insertion portion 31 of the detection member 3 can be extracted from the housing 41.

The lock member 43 is connected to the plunger 44 a of the solenoid actuator 44. Normally, the solenoid actuator 44 is in an energized state. The non-excitation solenoid actuator 44 keeps the lock member 43 in the lock position by the projection of the plunger 44a. The energized solenoid actuator 44 keeps the lock member 43 out of the lock position by retraction of the plunger.
The configuration is not limited to the configuration in which the solenoid actuator 44 advances and retracts the lock member 43. For example, an electric cylinder may advance and retract the lock member 43.

9 and 10 schematically show the insertion and removal of the detection member 3 fixed to the door 2 into and from the housing 41, the on / off of the limit switch 42 accompanying the insertion and removal of the detection member 3, and the advancement and retraction 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 24 is provided on the inner surface of the door 2. The support 24 is located near the upper end of the right side of the right door 22. It is desirable that the support 24 be at a high position so as not to reach the hand of the operator who has entered the inside of the housing 12.
The support stand 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-like shape, and protrudes in a direction orthogonal to the support plate 241 from one long side of 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 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 24, for example, the tip of each of the support plates 242 and 243 is welded to the inner surface of the right door 22. The support 24 can not be removed from the right door 22.
In the support plate 241, two round holes 244, 244 are vertically arranged in parallel. In the support plate 242, two round holes (not shown) are vertically juxtaposed.

The mounting member 5 is an L-shaped bracket. The mounting member 5 has mounting portions 51 and 52. Each of the attachment portions 51 and 52 has a rectangular plate shape that is long in one direction. The longitudinal directions of the attachment portions 51 and 52 are parallel. The attachment portion 51 protrudes from the long side of the attachment portion 52 in the direction orthogonal to the attachment portion 52.
In the mounting portion 51, two round holes 511, 511 are provided in parallel in the longitudinal direction of the mounting portion 51.
In the mounting portion 52, two long holes 521, 521 are provided in parallel in the longitudinal direction of the mounting portion 52. Each long hole 521 is long in the lateral direction of the attachment portion 52.

  The manufacturer detachably attaches the detection member 3 to the mounting member 5 using two screws 81 and 81 and two not-shown nuts. Specifically, the manufacturer aligns the long holes 321 and 321 of the attachment portion 32 of the detection member 3 with the round holes 511 and 511 of the attachment portion 51 of the attachment member 5 so that each long hole 321 and the round The screw 81 is inserted into the hole 511. The manufacturer then clamps the mountings 32, 51 together. The screw 81 is a screw, and the long hole 321 is a long hole elongated in the first direction.

  The manufacturer detachably attaches the mounting member 5 to the support 24 using two screws 82 and 82 and two nuts not shown. Specifically, the manufacturer aligns the long holes 521 and 521 of the attachment portion 52 of the attachment member 5 with the two round holes of the support plate 242 of the support table 24, and each long hole 521 and the support plate 242. The screw 82 is inserted into the round hole of. Next, the manufacturer clamps the mounting portion 52 and the support plate 242 together. The screw 82 is another screw, and the elongated hole 321 is an elongated hole elongated in the second direction.

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

When the detection member 3 is attached to the attachment member 5 attached to the support 24, the longitudinal direction of the long 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, 81, the relative position of the mounting portion 32 to the mounting portion 51 can be adjusted along the long hole 321, so the relative position of the detection member 3 to the mounting member 5 can be adjusted. It can be adjusted up and down.
The mounting portion 32 may have the round holes 511 and 511, and the mounting portion 51 may have the long holes 321 and 321.

The relative position of the mounting member 5 to the door 2 is adjusted in the front-rear direction, and the relative position of the detection member 3 to the mounting member 5 is adjusted in the vertical direction. The relative position can be adjusted up and down and back and forth. 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.
Moreover, the members 3 and 3 for common detection can be attached to the doors 2 and 2 of different specifications by changing the design of the member 5 for attachment suitably.

  If the screws 81 and 81 are removed, the detection member 3 can be removed from the door 2. If the screws 82 and 82 are removed, 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 using the screws 81, 81, 82, 82.

The shielding member 7 has two shielding portions 71 and 72 and a mounting portion 73. Each of the shielding parts 71 and 72 and the mounting part 73 has a rectangular plate shape which is long in one direction. The shielding portion 71 protrudes from the one long side of the shielding portion 72 in the direction orthogonal to the shielding portion 72. The attachment portion 73 protrudes from the other long side portion of the shielding portion 72 in the direction opposite to the shielding portion 71. The longitudinal directions of the shielding portions 71 and 72 and the mounting portion 73 are parallel to each other.
Two round holes are juxtaposed in the longitudinal direction of the mounting portion 73 in the mounting portion 73.

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

  When the shielding member 7 is fixed to the support 24 in this manner, 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. The shielding portion 71 inhibits the removal of the screw 81 by inhibiting the tool for removing the screw 81 from coming into contact with the screw head of the screw 81. Similarly, the shield 72 inhibits removal of the screw 82 by inhibiting a tool for removing the screw 82 from contacting the screw 82.

The relative position of the detection member 3 with respect to the door 2 can be adjusted in the vertical direction until the shielding member 7 is fixed as described above.
Since the shielding member 7 shields all the screws 81, 81, 82, 82, it is not necessary to shield the screws 81, 81, 82, 82 individually. 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 24 by riveting, welding, bonding or the like.
In addition, the shielding member 7 may be fixed to the detection member 3 or the attachment member 5.

A support 14 is provided on the inner surface of the front wall 121 of the housing 12. The support 14 is located near the upper end of the right side of the opening 125. It is desirable that the support 14 be at a high position so that the hand of the operator who has entered the inside of the housing 12 can not 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 surface of the support base 14 is directed upward. The support 14 can not be removed from the front wall 121.
The support stand 14 is provided with two round holes not shown.
The detection unit 4 is placed on the upper surface of the support table 14 such that the slit 411 faces left.

The holder 6 has three covering portions 61 to 63 and two mounting portions 64 and 64.
Each of the covering portions 61 to 63 has a rectangular plate shape. The covering portions 62 and 63 respectively project from the covering portion 61 in the 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. Covers 61 to 63 cover the detection unit 4 from the upper side, the rear side, and the right side, respectively. The holder 6 holds the detection unit 4 by sandwiching the detection unit 4 between the covering unit 61 and the support 14 and between the covering unit 62 and the front wall 121.
The mounting portions 64, 64 project along the support 14 from the tips of the covering portions 62, 63. 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 14 using two screws 83 and 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 14, and screws the round holes of the long holes 641 and the support 14. Insert 83 The manufacturer then clamps the mounting portion 64 and the support 14 together. The screw 83 is a second screw, and the long hole 641 is a long hole elongated in the third direction.

Even after the holder 6 is attached, the screw 83 can be loosened or removed. If the screws 83, 83 are removed, the holder 6 can be removed from the support 14. By loosening the screws 83, 83, the relative position of the mounting portion 64 to the support 14 can be adjusted along the long 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 a long hole 641.

The manufacturer adjusts the position of the detection member 3 in the vertical and longitudinal directions, and adjusts the position of the detection unit 4 in the lateral direction, thereby aligning the detection member 3 with 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 is complicated. However, the configuration for adjusting the position of the detection unit 4 in one direction is simple. Furthermore, 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, the position of the detection unit 4 does not have to be adjustable. However, the configuration for adjusting the position of the detection member 3 in three directions is complicated. Therefore, the configuration in which the position of the detection member 3 is adjustable in two directions and the position of the detection unit 4 is adjustable in one direction is most advantageous.

It is desirable that each of the screws 81 to 83 be made of chromium molybdenum steel. The chromium-molybdenum steel screws 81 to 83 have higher mechanical strength than stainless steel screws. 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 chromium 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 volatile memory, and a storage unit 133 using 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 operation of the machine tool 1 according to the computer program stored in the storage unit 133.

  The control device 13 or the machine main body 11 includes a motor driver (not shown) for separately driving the X-axis motor 112, the Y-axis motor 113, the Z-axis motor 115, the spindle motor 116, and the replacement motor 118. The motor driver receives the control signal and drives each motor provided in the machine main 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 operation of each of the Y-axis motor 113, the Z-axis motor 115, the spindle motor 116, and the replacement motor 118. When the control unit 131 outputs a control signal, the motor operates. When the control unit 131 does not output the control signal, the stopped motor does not operate, and the operated motor stops.
As a result of the above, the machine body 11 adjusts the position of the workpiece in the front-rear and left-right directions, processes the workpiece using a tool, and changes the tool.

  The detection unit 4 is connected to the control device 13 via a cable 45. The cable 45 includes signal lines 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 unit 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.

A control panel 15 is provided on the front wall 121 of the housing 12. The control panel 15 is located on the right side of the opening 125. In FIG. 9 and FIG. 10, the operation panel 15 is not shown.
When the machine main body 11 starts processing of a workpiece, the operator gives a processing start instruction to the control unit 131 by operating the operation panel 15.
When the processing start instruction is not received, the control unit 131 does not output the control signal.
When the machining start command is received, the control unit 131 determines whether the limit switch 42 is on.

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

When opening the locked door 2, the operator operates the operation panel 15 to give an unlocking command to the control unit 131. When the unlocking command is received, the control unit 131 determines whether or not the control signal is output. When the control signal is not output, the control unit 131 excites the solenoid actuator 44 because the machine body 11 is not operating.
When the control signal is output, since the machine body 11 is operating, the control unit 131 excites the solenoid actuator 44 after the output of the control signal is finished.

When the solenoid actuator 44 is in the excited state, the lock member 43 is disengaged from the through hole 311 of the detection member 3, so that the door 2 is unlocked.
After the door 2 is unlocked, the worker 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 unit 4. As a result, the limit switch 42 is turned off.
The control unit 131 may automatically excite the solenoid actuator 44 when the processing 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 and 81 and the screws 82 and 82. However, the shielding member 7 inhibits the removal of the screws 81 and 82. Moreover, the shielding member 7 is fixed to the door 2. Therefore, the shielding member 7 can not be removed. Accordingly, removal of the detection member 3 from the door 2 can be prevented.

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 detecting member 3 in the housing 41.
The machine body 11 processes the workpiece 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 necessarily closes the opening 125 of the housing 41. Therefore, it is possible to prevent the inconvenience that the machine body 11 operates even when the door 2 is open. Therefore, the safety can be improved.

Even after the detection tool 3 is attached to the door 2, the manufacturer of the machine tool loosens the screws 81, 81 or the screws 82, 82 before fixing the shielding member 7 so that the detection member 3 for the door 2 can be The relative position can be adjusted. The manufacturer fixes the shielding member 7 after the position of the detection 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, removal of the detection member 3 can be prevented after shipment of the machine tool 1 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 portion of the opening for inspection provided in the left wall 123 (or the right wall 124) of the housing 12 and the door for opening and closing the opening for inspection. May be
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 portion of the opening of the control device 13 and the door.
Additionally, multiple doors may open and close the opening 125. In this case, the detection member 3 may be attached to each door, and the detection units 4, 4,... Corresponding to the detection members 3, 3,. Alternatively, the detection unit 4 may be attached to each door, and the detection members 3, 3,... Corresponding to the detection units 4, 4,.

The door 2 is not limited to a sliding door that slides linearly. The door 2 may be a sliding door that slides in a curved shape.
The door 2 is not limited to the sliding door. The door 2 may be, for example, an open door or a roll-up shutter.

The machine tool 1 may be provided with a shielding member that shields the screws 83, 83 in such a manner as to inhibit the removal of the screws 83, 83 related to the detection unit 4. In this case, a malicious person can be prevented from removing the detection unit 4.
However, even if the detection unit 4 can be removed, there is no possibility that the problem occurs that the machine body 11 operates even when the door 2 is open. The reason is that the cable 45 is connected to the detection unit 4 so that even if the detection unit 4 is removed, it can not 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. In the following, differences from Embodiment 1 will be described, and in addition, the same components as in Embodiment 1 are assigned the same reference numerals and descriptions thereof will be omitted.

11 and 12 are perspective views showing a machine tool 1 according to the second embodiment. 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 double sliding doors (pulling doors). Each of the left door 25 and the right door 26 has a rectangular shape and slides in the left-right direction. A handle 251 is provided on the left side of the front of the left door 25. A handle 261 is provided on the right side of the front of the right door 26.
When the operator grips the handle 251 and pulls it to the left, the left door 25 moves to the left and opens. When the operator grips the handle 251 and pulls it to the right, the left door 25 moves to the right and closes. Similarly, when the operator grips the handle 261 and pulls it to the right, the right door 26 moves to the right and opens. When the operator grips the handle 261 and pulls it to the left, the right door 26 moves to the left and closes.
When the left door 25 and the right door 26 close the opening 125, the right side of the left door 25 contacts the left side of the right door 26.

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 24 is provided on the inner surface of the left door 25. The support 24 is located near the upper end of the right side of the left door 25.
The support 14 is provided on the inner surface of the right door 26. The support 14 is located near the upper end of the left side of the right door 26.

The machine tool 1 as described above achieves the same effects as the machine tool 1 of the first embodiment.
In addition, the left door 25 and the right door 26 may be, for example, two open doors of a double door.

  It should be understood that the embodiment disclosed herein is illustrative in all respects and not restrictive. The scope of the present invention is not the meaning described above, and is intended to include meanings equivalent to the claims and all modifications within the scope of the claims.

1 machine tool 12 housing 125 opening 2 door 25 left door (one of two doors)
26 Right door (the other of the two doors)
3 Detecting member 321 long hole (long hole in first direction)
4 detection unit 5 mounting member 521 long hole (long hole in second direction)
6 Holder 641 Long hole (long hole in the third direction)
7 shielding member 80 one way screw 81 screw (one screw)
82 screws (other screws)
83 screws (second screw)

Claims (8)

A housing provided with an opening,
A door for opening and closing the opening;
A machine tool including a detection member detachably attached to one of the door and the case using a screw and detecting opening and closing of the door;
A machine tool comprising: a shielding member fixed to the one or the detection member and shielding the screw so as to inhibit the removal of the screw. A housing provided with an opening,
Two doors opening and closing the opening;
A machine tool including a detection member detachably attached to one of the two doors using a screw and detecting opening and closing of the two doors;
A machine tool comprising: a shielding member fixed to the one or the detection member and shielding the screw so as to inhibit the removal of the screw.   The machine tool according to claim 1 or 2, wherein the shielding member is fixed to the one or the detection member using a one-way screw. The detecting member is detachably mounted using one of the screws, and the mounting member is further mounted detachably on the one using the other screw.
The machine tool according to any one of claims 1 to 3, wherein the shielding member shields the one screw and the other screw.   The detection member is attached to the one such that the relative position of the detection member with respect to the one is adjustable in one or more directions when the screw is loosened. The machine tool according to any one of claims 1 to 4, wherein A mounting member, the detection member being detachably mounted using one of the screws, and the other mounting member being removably mounted to the one using the other screw;
A detection unit attached to the other of the door and the housing and detecting the presence of the detection member when the door closes the opening;
And a holder which is detachably attached to the other using a second screw and holds the detection unit.
One of the screws is inserted in any of the detection member and the attachment member, and a long hole is provided in the first direction,
Another of the screws is inserted into either the mounting member or the one, and a long elongated hole is provided in a second direction different from the first direction,
The second screw is inserted in either the holder or the other, and a long hole is provided in the third direction,
The machine tool according to claim 1, wherein the workpiece is processed when the detection unit detects the presence of the detection member. A mounting member, the detection member being detachably mounted using one of the screws, and the other mounting member being removably mounted to the one using the other screw;
A detection unit attached to the other of the two doors, which detects the presence of the detection member when the two doors close the opening;
And a holder which is detachably attached to the other using a second screw and holds the detection unit.
One of the screws is inserted in any of the detection member and the attachment member, and a long hole is provided in the first direction,
Another of the screws is inserted into either the mounting member or the one, and a long elongated hole is provided in a second direction different from the first direction,
The second screw is inserted in either the holder or the other, and a long hole is provided in the third direction,
The machine tool according to claim 2, characterized in that the workpiece is processed when the detection unit detects the presence of the detection member.   The machine tool according to any one of claims 1 to 7, wherein the screw is made of chromium molybdenum steel.

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