JP2013202764A - Machine tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a machine tool in which even a general worker who is not allowed to open a door of a housing can safely attach/detach a backup power supply to/from a power supply case stored in the housing.SOLUTION: An opening that is opened/closed by a door is arranged at a rear surface of a housing 82. When the door is opened, a control substrate, an amplifier or the like that are stored in the housing 82 appear. An opening 824 that is opened/closed by a lid 16 is arranged at the right surface 823 of the housing 82. Since a power supply case 13 stored in the housing 82 appears when the lid 16 is opened, a worker is allowed to attach/detach a backup power supply to/from a power supply case 13. Even when the lid 16 is opened, the control substrate, the amplifier or the like stored in the housing 82 do not appear. Thus, there is no risk that the worker who has opened the lid 16 touches the control substrate, the amplifier or the like carelessly.

Description

  The present invention relates to a machine tool including a power supply case that detachably houses a rear power supply of a position detection unit that detects the position of a spindle.

The machine tool has a main shaft for performing various processes such as milling or tapping on the workpiece, and the main shaft in the X direction (left and right direction), Y direction (front and rear direction), and Z direction (up and down direction). An X-direction drive motor, a Y-direction drive motor, and a Z-direction drive motor for movement are provided, and a control device.
The control device is arranged behind a machine body of a machine tool having a main shaft and each drive motor (see Patent Document 1). The control device includes a control board that controls the operation of each drive motor, an amplifier that controls power supply to each drive motor, and a housing that houses them. Hereinafter, devices such as a control board and an amplifier housed in the housing are referred to as housing devices.

  By the way, the X direction drive motor is provided with an X direction encoder for detecting the rotation of the X direction drive motor. The control board obtains the position of the main shaft in the X direction based on the detection result of the X direction encoder. Similarly, the Y-direction drive motor and the Z-direction drive motor are provided with a Y-direction encoder and a Z-direction encoder.

  For example, when the operator manually moves the spindle in the X direction after turning off the main power supply of the machine tool, the X-direction drive motor is rotated along with the movement of the spindle. At this time, if the X-direction encoder detects the rotation of the X-direction drive motor, the position of the main shaft in the X direction after the main power supply is turned off can be obtained. In the same manner, the positions of the main shaft in the Y direction and Z direction after the main power supply is turned off can be obtained. For this reason, after the main power supply is turned off, power is supplied from the rear power supply to the X direction encoder, the Y direction encoder, and the Z direction encoder.

For example, a dry battery is used as the back-up power source. A power supply case that detachably accommodates the dry battery is accommodated in a casing included in the control device.
An opening is provided on one surface of the housing. This opening is opened and closed by a door. When this door is opened, the accommodation device and the power supply case appear. In other words, in order to replace the dry batteries contained in the power supply case, it is necessary to open the housing door.

JP 2011-215793 A

  However, only a special worker (for example, a maintenance worker who performs maintenance work on a machine tool) is permitted to open the door. This is because if a general worker (for example, a processing worker who uses a machine tool to perform a processing operation) opens the door of the housing and touches the accommodation device carelessly, it may lead to a failure or an accident. Because there is. Therefore, a dry battery cannot be replaced by a general worker.

  The present invention has been made in view of such circumstances, and the main object of the present invention is to provide a back-up power supply for the power supply case by adopting a configuration in which the accommodation device appears when the door is opened and the power supply case appears when the lid is opened. Is to provide a machine tool that can be safely attached and detached.

  A machine tool according to the present invention includes a main shaft that holds a tool, a control unit that controls movement of the main shaft, a position detection unit that receives power from a power source and detects the position of the main shaft, and a power source that is installed in the position detection unit In a machine tool comprising: a power supply case that detachably accommodates a power supply case; a support part that supports the power supply case; and a housing that houses the control part, the power supply case, and the support part. A first opening formed on the door, a door provided on the first opening, a second opening formed on the other surface adjacent to the one surface, and the second opening. When the door is opened, at least the control unit appears, and when the lid is opened, the power supply case appears, and at least the power supply case closes the second opening. It is characterized by being.

  The machine tool according to the present invention includes a plurality of the position detection units, and the housing further accommodates a distribution unit that distributes and supplies the power of the back-up power source to the plurality of position detection units. It is arranged on the other side.

  In the machine tool according to the present invention, the support portion is provided with a support plate in which a support hole for supporting the power supply case is formed, and protrudes on the inner side of the other surface. A plate support portion disposed so as to face the other surface, and the power supply case is provided with a plate-like protruding piece in a direction along the other surface. Is inserted into the support hole so that the protruding piece is positioned between the support plate and the other surface.

  The machine tool according to the present invention is characterized in that the power supply case and the support portion are provided so as to be able to advance / immerse into the housing through the second opening when the lid is opened / closed. .

In the present invention, the housing included in the machine tool includes a door that opens and closes the first opening and a lid that opens and closes the second opening. However, the door is arranged on one surface, and the lid is arranged on the other surface adjacent to this one surface (hereinafter referred to as the adjacent surface).
The housing accommodates a control unit, a power supply case, and a support unit. The power supply case accommodates a rear power supply in a removable manner. The support part supports the power supply case.

When the door is opened, the control unit appears. Therefore, the operator performs operation or maintenance of the control unit after the door is opened.
When the lid is opened, the power case appears. Therefore, the operator attaches and detaches the auxiliary power supply to the power supply case after the lid is opened.
On the other hand, even if the lid is opened, the control unit does not appear. This is because at least the power supply case closes the second opening. Therefore, there is no possibility that the operator touches the control unit carelessly.

In the present invention, the housing further accommodates the distribution unit. In this case, the machine tool includes a plurality of position detection units.
The power of the rear power supply is input to the distribution unit, and the power input to the distribution unit is distributed and supplied (ie, output) to each of the plurality of position detection units.
Since the distribution unit is disposed on the adjacent surface, the separation distance between the power supply case and the distribution unit is shorter than that in the case where the distribution unit is disposed on other than the adjacent surface. Therefore, the electric wire distribute | arranged between a power supply case (and extension power supply) and a distribution part can be shortened.

In the present invention, the support part has a support plate and a plate support part.
The plate support part protrudes inside the adjacent surface.
The support plate is disposed at the tip of the plate support portion. At this time, the support plate and the adjacent surface face each other, and a gap is generated between the support plate and the adjacent surface by an amount corresponding to the protrusion of the plate support portion.

The power supply case has a protruding piece protruding in a direction along the adjacent surface. The power supply case is inserted into a support hole provided in the support plate so that the protruding piece is positioned between the support plate and the adjacent surface. For this reason, the power supply case is supported in a required posture by holding the projecting piece between the support plate and the adjacent surface or by engaging the projecting piece with the opening peripheral edge of the support hole of the support plate. .
That is, by providing the plate support portion and the support plate, the power supply case on which the projecting piece protrudes can be easily fixed inside the housing with a simple configuration.

  In the present invention, when the lid is opened, the power supply case and the support part advance from the housing through the second opening. When the lid is closed, the power supply case and the support part are immersed in the housing through the second opening. That is, since the opening / closing of the lid is interlocked with the entry / exit of the power supply case and the support portion, the convenience of the operator can be improved.

  In addition, after the power supply case is taken out of the housing, the backup power supply can be attached and detached. That is, it is not necessary for the operator to attach / detach the back-up power supply to / from the power supply case inside the housing through the second opening. Therefore, the opening size of the second opening can be reduced as compared with the case where the rear power supply is attached and detached while the power supply case is located inside the housing.

In the case of the machine tool of the present invention, the power supply case housed in the housing appears when the lid is opened, so that even a general worker can attach and detach the back-up power supply to the power supply case. At this time, since the control part accommodated in the housing | casing does not appear uselessly, it is safe.
If a back-up power supply is attached to the power supply case, for example, even after the main power supply of the machine tool is turned off, the position detection unit can detect the position of the spindle of the machine tool.

1 is a schematic perspective view of a machine tool according to Embodiment 1 of the present invention. It is a simplified front view of a machine tool. 1 is a schematic right side view of a machine tool. It is a schematic perspective view of the machine tool which omitted the tool changer. It is a perspective view which shows the cover for machine tools schematically. It is an external appearance perspective view which briefly shows the control apparatus which cancelled | released the closure by a door. It is a rear view which briefly shows the internal structure of the control apparatus which abbreviate | omitted description of the door. It is a block diagram for demonstrating the electric power feeding to each encoder. It is a perspective view for demonstrating the support structure of the power supply case with which a control apparatus is provided. It is a longitudinal cross-sectional view (at the time of lid | cover opening) which shows the support structure of a power supply case. It is a longitudinal cross-sectional view (at the time of lid closure) which shows the support structure of a power supply case. It is a perspective view for demonstrating the support structure of the power supply case in the machine tool which concerns on Embodiment 2 of this invention. It is a longitudinal cross-sectional view (at the time of lid | cover opening) which shows the support structure of a power supply case. It is a longitudinal cross-sectional view (during lid opening / closing) which shows the support structure of a power supply case. It is a longitudinal cross-sectional view (at the time of lid closure) which shows the support structure of a power supply case.

  Hereinafter, the present invention will be described in detail with reference to the drawings illustrating embodiments thereof.

Embodiment 1.
FIG. 1 is a schematic perspective view of a machine tool 100. FIG. 2 is a schematic front view of the machine tool 100. FIG. 3 is a schematic right side view of the machine tool 100. FIG. 4 is a schematic perspective view of the machine tool 100 in which a tool changer 10 to be described later is omitted. In the following description, up and down, left and right, and front and rear indicated by arrows in the figure are used. The operator operates the machine tool 100 in front of the machine tool 100 to attach and detach the workpiece.

The machine tool 100 includes a machine main body and a machine tool cover 1 (see FIG. 5) surrounding the machine main body. The machine body includes a base 20, a fixed base 21, a Y-direction moving device 22, an X-direction moving device 26, a column 28, a Z-direction moving device 30, a spindle head 32, a tool changer 10, and the like.
The base 20 is fixed on the floor surface. The fixed base 21 has a rectangular box shape that is long in the front-rear direction and is provided on the base 20. A Y-direction moving device 22 is fixed to the fixed base 21.

An X-direction moving device 26 is provided on the Y-direction moving device 22. A column 28 is provided on the X-direction moving device 26. The X direction moving device 26 and the Y direction moving device 22 support the column 28 so as to be movable in the X direction and the Y direction.
The column 28 supports the spindle head 32 through the Z direction moving device 30 so as to be movable in the Z direction. Inside the spindle head 32, a spindle 34 is arranged in a vertical posture with its lower end exposed.

  The tool changer 10 changes a tool holder attached to the main shaft 34. More specifically, the tool changer 10 includes an endless tool magazine 11 to which a plurality of tool holders are attached, and a magazine motor 12 for rotating the tool magazine 11. The tool holder holds a tool. The tool changer 10 conveys a plurality of tool holders by rotating the tool magazine 11, and attaches / detaches a required tool holder to the lower end portion of the main shaft 34.

The main shaft 34 is connected to a main shaft motor 35 provided at the upper end of the main shaft head 32. The main shaft 34 rotates around the shaft center by driving the main shaft motor 35. The spindle 34 can rotate the workpiece fixed to the workpiece holder 120 by rotating around the axis while a tool holder holding a tool is attached to the lower end of the spindle 34.
A cooling fan (not shown) is fixed to the upper end of the spindle motor 35.

  The Y-direction moving device 22 includes a pair of guide rails 22a, 22a parallel to each other, a plurality of blocks 22b, 22b,..., 22b, a Y-direction moving base 22c, a Y-direction drive motor 22d (see FIG. 8), and the like. . The guide rails 22a and 22a are extended in the front-rear direction on the upper surface of the fixed base 21 with an appropriate interval on the left and right sides. The blocks 22b, 22b,..., 22b are fitted to the guide rails 22a, 22a so as to be movable back and forth. The Y-direction moving base 22c is fixed on the blocks 22b, 22b, ..., 22b. The Y-direction moving base 22c moves back and forth when the Y-direction drive motor 22d drives a ball screw mechanism (not shown).

  The X-direction moving device 26 includes a pair of guide rails 26a, 26a parallel to each other, a plurality of blocks 26b, 26b,..., 26b, a column base 26c, and an X-direction drive motor 26d (see FIG. 8). The guide rails 26a and 26a are extended to the left and right on the upper surface of the Y-direction moving table 22c with an appropriate interval in the front and rear direction. The blocks 26b, 26b,..., 26b are fitted to the guide rails 26a, 26a so as to be movable left and right. The column base 26c is fixed on the blocks 26b, 26b,. The column base 26c moves to the left and right when the X-direction drive motor 26d drives a ball screw mechanism (not shown). The column 28 is fixed on the column base 26c.

  The column 28 is moved in the Y direction and the X direction by the Y direction moving device 22 and the X direction moving device 26.

  The Z-direction moving device 30 includes a pair of guide rails 30a, 30a parallel to each other, a plurality of blocks 30b, 30b,..., 30b, a spindle head base 30c, and a Z-direction drive motor 30d (see FIG. 8). The guide rails 30a, 30a are vertically extended on the front surface of the column 28 with an appropriate interval on the left and right. The plurality of blocks 30b, 30b,..., 30b are fitted to the guide rails 30a, 30a so as to be movable up and down. The spindle head base 30c is fixed to the front surfaces of the blocks 30b, 30b, ..., 30b. The spindle head base 30c moves up and down when the Z-direction drive motor 30d drives a ball screw mechanism (not shown). The spindle head 32 is fixed to the spindle head base 30c.

  The front / rear, left / right, and up / down movements of the spindle head 32 (and the spindle 34 built in the spindle head 32) drive-control the X-direction drive motor 26d, the Y-direction drive motor 22d, and the Z-direction drive motor 30d. It will be realized.

FIG. 5 is a perspective view schematically showing the machine tool cover 1.
The machine tool cover 1 is provided on the upper side of the base 20. The machine tool cover 1 extends vertically and has a rectangular front wall 50, a left wall 60, a right wall 70, and a rear wall that cover the front side, the left side, the right side, and the rear side of the machine body of the machine tool 100. 80. The machine tool cover 1 covers the upper side of the machine tool 100 and includes a rectangular ceiling 90 parallel to the left and right and front and rear.

The right wall 70 includes two removable panels 71 and 71 at the center. The panels 71 and 71 are disposed in an opening provided in the central portion of the right wall 70. The operator removes the panels 71 and 71 as necessary, puts his hand through the opening, or enters the machine tool cover 1 through the opening to perform maintenance management of the machine tool 100.
Similar to the right wall 70, the left wall 60 also has an opening in the center, and two removable panels are arranged in the opening.
A control device 81 is disposed on the rear wall 80. The central portion of the ceiling 90 protrudes upward in order to avoid contact with the spindle head 32, the column 28, and the like.

A vertically long rectangular opening 51 is provided at the center of the front wall 50. In the opening 51, a vertically long rectangular right door 52 and a left door 53 are juxtaposed so as to be movable left and right.
The right door 52 is disposed behind the left door 53. A handle 52 a is provided on the front surface of the right door 52. When the operator holds the handle 52a and pulls it to the left side, the right door 52 and the left door 53 sequentially move to the left side and open.
On the right side of the opening 51, an operation panel 54 is provided for an operator to input a command.

FIG. 6 is an external perspective view schematically showing the control device 81 released from being closed by a door 83 to be described later. FIG. 7 is a rear view schematically showing the internal configuration of the control device 81 in which the door 83 is not shown.
The control device 81 includes a vertically long rectangular parallelepiped casing 82. An opening (first opening) 822 is provided on the rear surface (one surface) 821 of the housing 82. The housing 82 includes a door 83 that opens and closes the opening 822.
An insertion hole 82 a through which the power cable 111 is inserted is provided on the lower surface of the housing 82. A breaker 84 is provided on the lower left side of the housing 82.

  The breaker 84 is located in the vicinity of the insertion hole 82a. The breaker 84 has a rectangular parallelepiped shape, and has an input part and an output part at the upper part and lower part of the breaker 84.

  The power cable 111 passes through the insertion hole 82a and connects the input portion of the breaker 84 and the 200V power source 110. This power source 110 is a power source external to the machine tool 100. One end of a power line (not shown) is connected to the output portion of the breaker 84. The other end of the power line is connected to an input / output board (distributor) 93. The input / output board 93 is input / output of control signals between a control board (control part) 94 and a machine tool 100, which will be described later, or each part of the machine tool 100 (specifically, housed in the casing 82). For outputting power to the X to Z direction amplifiers 88, 89, 86, the main shaft amplifier 87, the fan protection device 92, the option amplifier 97, and the like).

The breaker 84 is provided so that the connection between the power cable 111 and the power line can be disconnected. While the power cable 111 and the power line are connected, the power supplied from the power source 110 is distributed and supplied to each part of the machine tool 100. When the connection between the power cable 111 and the power line is disconnected, the power supply from the power source 110 is cut off.
A switch portion 84 a is provided on the rear surface of the breaker 84. When the door 83 is closed, the switch portion 84 a is connected to a rotary lever 85 provided on the surface of the door 83. After the lever 85 rotates in one direction, the door 83 opens.

When the lever 85 rotates in one direction with the door 83 closed, the switch portion 84a moves in one direction and disconnects the connection between the power cable 111 and the power line. At this time, the power supply is forcibly stopped. As a result, before the door 83 is opened, the power supply from the power source 110 is cut off.
When the lever 85 rotates in the other direction while the door 83 is closed, the switch portion 84a moves in the other direction and reconnects the power cable 111 and the power line. At this time, the supply of power is resumed.

  A Z-direction amplifier 86 for controlling power supply to the Z-direction drive motor 30d is provided at the right-side center portion inside the front surface of the housing 82. A spindle amplifier 87 for controlling power supply to the spindle motor 35 is provided on the left side of the Z direction amplifier 86 and above the breaker 84. An X-direction amplifier 88 and a Y-direction amplifier 89 that control power supply to the X-direction drive motor 26d and the Y-direction drive motor 22d are juxtaposed on the left and right in the front inner side of the housing 82.

  An AVR (Automatic Voltage Regulator) 91 for converting a 200V system voltage into a 24V system or a 12V system is provided in the upper center portion inside the front surface of the housing 82. Below the AVR 91, a fan protection device 92 that protects / relays the above-described cooling fan (not shown) and a protection device 95 that protects the input / output board 93 from overcurrent are arranged side by side. The fan protection device 92 and the protection device 95 are connected and unitized. An optional amplifier 97 is provided below the fan protection device 92 as necessary. As the optional amplifier 97, for example, when the machine tool 100 includes a robot arm that attaches a workpiece to the workpiece holding unit 120, an amplifier that controls power supplied to a drive motor of the robot arm can be used.

Inside the right surface (other surface) 823 of the housing 82, an input / output board 93 and a control board 94 are arranged in parallel in the vertical direction. However, the control board 94 is positioned above the input / output board 93. The control board 94 includes a CPU (Central Processing Unit), a ROM (Read Only Memory), a RAM (Random Access Memory), and the like, and controls the operation of each motor described above.
The input / output board 93 and the fan protection device 92 are connected by a detection cable 96 that inputs a voltage input to the fan protection device 92 to the input / output board 93. As will be described later, the power supply voltage is input to the fan protection device 92. The fan protection device 92 and the protection device 95 are unitized, and the power supply voltage is also input to the protection device 95. The input / output board 93 monitors the power supply voltage input to the fan protection device 92 and monitors the input voltage of the protection device 95.

  The power supply voltage (200 V system) is supplied to the X to Z direction amplifiers 88, 89, 86, the main shaft amplifier 87, the fan protection device 92, and the option amplifier 97. The power supply voltage is input to the AVR 91 via a protection switch (not shown). The AVR 91 converts the input voltage into a 24V system or a 12V system. The AVR 91 is connected to the control board 94 and the input / output board 93, and a 24V or 12V system voltage is input to the control board 94 and the input / output board 93. The control board 94 and the input / output board 93 are used by converting a 24V system or 12V system voltage into, for example, a 5V system, a 10V system, or a 25V system.

  In the control device 81, when the door 83 is opened, accommodation devices such as an input / output board 93, a control board 94, and X to Z direction amplifiers 88, 89, and 86 housed in the casing 82 appear. A special worker who has the authority to open the door 83 opens the door 83 and performs, for example, maintenance work on the accommodation equipment.

FIG. 8 is a block diagram for explaining power feeding to each encoder (position detection unit) described later.
In order to accurately machine the workpiece, it is necessary to accurately grasp the front and rear, left and right, and top and bottom positions of the main shaft 34. For this purpose, the Y-direction drive motor 22d, the X-direction drive motor 26d, and the Z-direction drive motor 30d are provided with a Y-direction encoder 22e, an X-direction encoder 26e, and a Z-direction encoder 30e. Each encoder uses a rotary encoder.

The Y direction encoder 22e detects the rotation of the Y direction drive motor 22d. The rotation of the Y-direction drive motor 22d corresponds to the position before and after the spindle head 32 (and thus the spindle 34). The detection result of the Y-direction encoder 22e is given to the control board 94. The control board 94 obtains the front and rear positions of the main shaft 34 based on the given detection result.
Similarly, the control board 94 obtains the left and right positions of the main shaft 34 based on the detection result of the X direction encoder 26e, and obtains the upper and lower positions of the main shaft 34 based on the detection result of the Z direction encoder 30e.

  The control board 94 controls the operations of the Y-direction drive motor 22d, the X-direction drive motor 26d, and the Z-direction drive motor 30d based on the front / rear, left / right, and upper / lower positions of the main shaft 34. As a result, the main shaft 34 can be accurately moved to a required position.

  The Y-direction encoder 22e, the X-direction encoder 26e, and the Z-direction encoder 30e are usually supplied with power from the power source 110. More specifically, the power supplied from the power source 110 is input to the input / output board 93 and is output from the input / output board 93 to the Y-direction encoder 22e, the X-direction encoder 26e, and the Z-direction encoder 30e.

When the control device 81 is not supplied with power from the power source 110 (for example, when power supply from the power source 110 is interrupted as the door 83 is opened), the Y-direction encoder 22e, the X-direction encoder 26e, and the Z-direction encoder Power is supplied from a backup power source (rear power source) 14. More specifically, the power supplied from the backup power supply 14 is input to the input / output board 93 and is output from the input / output board 93 to the Y-direction encoder 22e, the X-direction encoder 26e, and the Z-direction encoder 30e.
The backup power source 14 uses, for example, three AA batteries and is detachably accommodated in the power case 13.

When the control device 81 is not supplied with power from the power supply 110, none of the Y-direction drive motor 22d, the X-direction drive motor 26d, and the Z-direction drive motor 30d operates. However, for example, if the operator manually moves the spindle head 32 (and thus the spindle 34) back and forth, the Y-direction drive motor 22d is rotated.
At this time, the Y-direction encoder 22e detects the rotation of the Y-direction drive motor 22d while being fed from the backup power source 14 via the input / output board 93. Similarly, the X-direction encoder 26e and the Z-direction encoder 30e detect rotation of the X-direction drive motor 26d and the Z-direction drive motor 30d while being supplied with power from the backup power supply 14 via the input / output board 93.

  Therefore, the control board 94 uses the detection results of the Y-direction encoder 22e, the X-direction encoder 26e, and the Z-direction encoder 30e even when the main shaft 34 moves when the control device 81 is not supplied with power from the power source 110. Based on this, the front / rear, left / right and up / down positions of the main shaft 34 can be obtained.

The power supply case 13 has a rectangular box shape, and is arranged further below the input / output board 93 inside the right surface 823 of the housing 82 as shown in FIG. More specifically, the power supply case 13 is supported on the inside of the right surface 823 of the casing 82 in a vertical posture via the support portion 19.
Next, a support structure for the power supply case 13 will be described.
FIG. 9 is a perspective view for explaining the support structure of the power supply case 13.
10 and 11 are longitudinal sectional views showing the support structure of the power supply case 13.
9 and 10 show a state in which the lid 16 described later is opened. FIG. 11 shows the lid 16 when it is closed.

First, the configuration of the power supply case 13 will be described.
The power supply case 13 includes a rectangular box-shaped box body 131 and a rectangular plate-shaped lid 132. The box body 131 has a rectangular opening 13a formed on the right side surface (hereinafter referred to as a top surface), a left side surface (hereinafter referred to as a bottom surface) 13b, and four side surfaces 13c, 13c, 13e, 13e. Have Of the side surfaces 13c, 13c, 13e, and 13e, the two side surfaces 13c and 13c corresponding to the short side of the opening 13a are inclined in a direction to reduce the volume of the box body 131 from the opening 13a side to the bottom surface 13b side. .

The lid 132 opens and closes the opening 13a. When the lid 132 is opened, the backup power source 14 (or the space in which the backup power source 14 is to be accommodated) that is accommodated in the box body 131 appears.
On the side surfaces 13c and 13c, plate-like projecting pieces 13d and 13d are projected. The protruding pieces 13d and 13d are provided flush with the top surface of the box body 131.

Next, the configuration of the housing 82 near the position where the power supply case 13 is disposed will be described.
An opening (second opening) 824 and an engagement recess 825 are formed on the right surface 823 of the housing 82.
The opening 824 has a rectangular shape that is larger than the opening dimension of the opening 13a and smaller than the outer dimension of the support plate 18 described later. For this reason, the lid 132 can be opened and closed through the opening 824.
The formation position of the opening 824 is the rear lower part of the right surface 823. The formation position of the engagement recess 825 is in the vicinity of the upper side of the opening 824.

The opening 824 is opened and closed by a lid 16 using a rectangular hinge lid. The lower side portion of the lid 16 is hinged to the lower side portion of the opening 824. On the upper side portion of the lid 16, an engagement convex portion 161 that is detachably engaged with the engagement concave portion 825 of the housing 82 is provided. When the lid 16 is opened / closed, the engaging convex portion 161 is separated / approached with respect to the engaging concave portion 825.
When the lid 16 closes the opening 824, the engaging convex portion 161 engages with the engaging concave portion 825. For this purpose, for example, a male screw is formed in the engaging convex portion 161, and a female screw is formed in the engaging concave portion 825. When the engagement between the engagement convex portion 161 and the engagement concave portion 825 is released, the lid 16 can be opened.

The support portion 19 includes plate support portions 17 and 17 and a support plate 18.
Inside the right surface 823, two boss-like plate support portions 17 and 17 project. One plate support portion 17 is disposed on the upper rear side of the opening 824, and the other plate support portion 17 is disposed on the lower front side of the opening 824. A female screw is formed inside each plate support portion 17.

The support plate 18 has a rectangular plate shape in which the center of the upper side is cut out in a rectangular shape. The notch-like portion of the support plate 18 is provided in order to prevent the support plate 18 from interfering with the distal end portion of the engaging convex portion 161 engaged with the engaging concave portion 825.
A rectangular support hole 181 is formed at the center of the support plate 18. The box body 131 excluding the projecting pieces 13d and 13d can be inserted into the support hole 181.

  The support plate 18 is screwed to the plate support portions 17 and 17. Therefore, through holes 182 and 182 corresponding to the plate support portions 17 and 17 are formed in the support plate 18. The plate 18 is formed so that the support plate 18 faces the inner side of the right surface 823 by passing through the through holes 182 and 182 and two male screws (not shown) screwed into the female screws of the plate support portions 17 and 17. It is arranged at the tip of the support parts 17, 17.

When attaching the power supply case 13 to the right surface 823, first, the operator inserts the box body 131 of the power supply case 13 into the support hole 181 of the support plate 18. At this time, the projection pieces 13 d and 13 d of the box body 131 are engaged with the opening peripheral edge of the support hole 181, whereby the power supply case 13 is supported by the support plate 18.
Next, the operator screws the support plate 18 supporting the power supply case 13 to the plate support portions 17 and 17. At this time, the operator places the projecting pieces 13 d and 13 d of the power supply case 13 between the right surface 823 of the housing 82 and the support plate 18. As a result, the opening 13a of the box body 131 faces toward the opening 824 of the right surface 823.
As a result of the above, the power supply case 13 is supported on the inner side of the right surface 823 of the housing 82 in a vertical posture via the plate support portions 17 and 17 and the support plate 18.

  When attaching / detaching the backup power supply 14, the operator first opens the lid 16, and then opens the lid 132 through the opening 824 and the support hole 181. As a result, through the opening 824, the support hole 181, and the opening 13a, the outside of the housing 82 and the space in which the backup power supply 14 of the box body 131 is to be accommodated communicate. For this reason, the operator can attach and detach the backup power supply 14 to and from the power supply case 13. After completing the attachment / detachment of the backup power supply 14, the operator closes the lid 132 through the opening 824 and the support hole 181, and finally closes the lid 16.

  As described above, when the lid 16 is opened, the power supply case 13 appears. However, accommodation devices such as the input / output board 93, the control board 94, and the X to Z direction amplifiers 88, 89, and 86 do not appear. This is because the power supply case 13 is located between the opening 824 and the support hole 181 and the accommodation device. In other words, at least the power supply case 13 (more specifically, the power supply case 13 and the support plate 18) closes the opening 824.

The work that can be performed when the lid 16 is opened is only a relatively safe and simple work such as the work of attaching and detaching the backup power supply 14. In other words, even if the lid 16 is opened, a relatively dangerous or complicated operation such as a maintenance operation for the accommodation device cannot be performed. Therefore, there is no particular problem even if a general worker who does not have the authority to open the door 83 is given the authority to open the lid 16. As a result, a general worker can perform the work of attaching / detaching the backup power supply 14.
In order to prevent the backup power supply 14 from being stolen, for example, when the lid 16 is opened, a special tool for releasing the engagement of the engagement convex portion 161 and the engagement concave portion 825 may be required.

The lid 16 in the present embodiment is a hinge lid, but is not limited to this. For example, the lid 16 may have a shutter shape or a sliding door shape.
When the door 83 is opened, the bottom surface 13b of the power supply case 13 accommodated in the housing 82 appears. The backup power source 14 cannot be attached or detached from the bottom surface 13b side. Further, since the power supply case 13 is arranged in a vertical posture, the size of the space occupied by the power supply case 13 in the left-right direction is smaller than that in the case where the power supply case 13 is arranged in a horizontal posture. Therefore, the wide space on the left side of the power supply case 13 inside the housing 82 can be freely used for purposes unrelated to the attachment / detachment of the backup power supply 14.

  In the control device 81 as described above, the power supply case 13 and the input / output board 93 are both arranged inside the right surface 823 of the housing 82. Therefore, it is possible to shorten the electric wires arranged between the power supply case 13, the input / output board 93, and the input / output board 93, for example, compared to the case where the input / output board 93 is arranged inside the front surface of the housing 82. it can.

Embodiment 2. FIG.
FIG. 12 is a perspective view for explaining a support structure for power supply case 13 in machine tool 100 according to Embodiment 2 of the present invention.
Also in the present embodiment, the power supply case 13 is arranged further below the input / output board 93 inside the right surface 823 of the housing 82. However, the support structure of the power supply case 13 is different from that of the first embodiment.
Hereinafter, differences between the first and second embodiments will be described, and other parts corresponding to those of the first embodiment are denoted by the same reference numerals and description thereof will be omitted.

13 to 15 are longitudinal sectional views showing the support structure of the power supply case 13.
FIG. 13 shows when the lid 41, which will be described later, is opened, FIG. 15 shows when the lid 41 is closed, and FIG. 14 shows that the lid 41 is being opened and closed.
First, the configuration of the casing 82 in the vicinity of the position where the power supply case 13 is arranged will be described with reference to FIGS.
An opening 826 and an engagement recess 827 are formed on the right surface 823 of the housing 82. The opening 826 and the engagement recess 827 correspond to the opening 824 and the engagement recess 825 of the first embodiment.

However, the opening size of the opening 826 is smaller than that of the opening 824 of Embodiment 1. The formation position of the engagement recess 827 is in the vicinity of the upper side of the opening 826. The engagement recess 827 is formed below the engagement recess 825 of the first embodiment.
The opening 826 has an opening dimension that allows a power supply case housing (supporting portion) 42 described later to be inserted into and retracted from the housing 82 through the opening 826.

The opening 826 is opened and closed by a lid 41 using a rectangular hinge lid. The lid 41 corresponds to the lid 16 of the first embodiment. On the upper side portion of the lid 41, an engagement convex portion 411 that is detachably engaged with the engagement concave portion 827 of the housing 82 is provided. The engaging convex portion 411 corresponds to the engaging convex portion 161 of the first embodiment.
A rectangular box-shaped power supply case container 42 is fixed to the inner surface of the lid 41.

An opening 42 a is provided on the top surface of the power supply case container 42, and the box body 131 of the power supply case 13 is accommodated and supported in the power supply case container 42 through the opening 42 a. However, the opening 13 a (and thus the lid 132) of the box body 131 is exposed to the outside of the power supply case container 42.
Of the four side surfaces of the power supply case container 42, two side surfaces that are continuous with the long side of the top surface have an inverted trapezoidal shape. Two side surfaces connected to the short side of the top surface are inclined from the top surface to the bottom surface. One of the two side surfaces connected to the short side of the top surface is bonded or welded to the inner surface of the lid 41 so that the opening 13a side of the box body 131 faces upward.

The opening and closing of the lid 41 means that the lid 41 swings about a portion hinged to the right surface 823 as an axis. From the viewpoint of the operator facing the right surface 823, the lid 41 opens so as to fall to the near side and closes so as to rise to the far side.
Therefore, when the lid 41 is opened, the power supply case container 42 fixed to the lid 41 comes out to the front side. At this time, the right end portion of the power supply case housing 42 and the portion housing the power supply case 13 all move out of the housing 82, but the left end portion of the power supply case housing 42 remains inside the housing 82. The left end portion of the power supply case container 42 is engaged with the inside of the right surface 823. As a result, the entire power supply case container 42 is prevented from advancing outside the housing 82.

When the lid 41 is closed, the power supply case container 42 fixed to the lid 41 enters the back side. The power supply case container 42 is housed in the housing 82.
When the lid 41 is opened / closed, the power supply case 13 accommodated and supported in the power supply case container 42 advances / immerses into / outside the housing 82 through the opening 826.

  When a general worker attaches or detaches the backup power supply 14, the worker opens the lid 41 and pulls the power supply case 13 out of the housing 82. At this time, the lid 41, the power supply case container 42 and the like go from the state shown in FIG. 15 to the state shown in FIG. 13 through the state shown in FIG. Next, the operator opens the lid 132 outside the housing 82. As a result, the operator can attach / detach the backup power supply 14 to / from the power supply case 13 through the opening 13a.

  After completing the attachment / detachment of the backup power supply 14, the operator closes the lid 132 outside the housing 82 and finally closes the lid 41 to push the power supply case 13 into the housing 82. At this time, the lid 41, the power supply case container 42 and the like go from the state shown in FIG. 13 to the state shown in FIG. 15 through the state shown in FIG.

  As described above, when the lid 41 is opened, the power supply case 13 advances to the outside of the housing 82. However, even if the lid 41 is opened, accommodation devices such as the input / output board 93, the control board 94, and the X to Z direction amplifiers 88, 89, and 86 do not appear. This is because the opening 826 is closed by the power supply case 13 and the power supply case container 42.

  The work that can be performed when the lid 41 is opened is only a relatively safe and simple work such as the work of attaching and detaching the backup power supply 14. In other words, even if the lid 41 is opened, a relatively dangerous or complicated operation such as a maintenance operation for the accommodation device cannot be performed. Therefore, there is no particular problem even if a general worker who does not have the authority to open the door 83 is given the authority to open the lid 41. As a result, a general worker can perform the work of attaching / detaching the backup power supply 14.

  On the other hand, when a special worker removes the backup power supply 14 when, for example, maintaining the accommodation equipment, the worker opens the door 83 with the lid 41 closed. At this time, the power supply case 13 accommodated in the housing 82 appears. Therefore, the operator can attach and detach the backup power source 14 without opening the lid 41.

  The lid 41 is not limited to a hinge lid. For example, when the power supply case container 42 is configured as a drawer that should be inserted and withdrawn through the opening 826, the lid 41 may be configured as a front plate of the drawer, and the sliding door or shutter separate from the power supply case container 42. You may comprise as.

  The power supply case container 42 is arranged in an inclined posture with the power supply case 13 accommodated and supported on the upper side, regardless of whether the power supply case container 42 has advanced to the outside of the housing 82 or has entered the housing 82. For this reason, the size in the left-right direction of the space occupied by the power supply case container 42 is smaller than that in the case where the power supply case container 42 is arranged in a horizontal posture. In other words, the power supply case container 42 is compactly supported in the left-right direction. Therefore, the power supply case container 42 that has advanced to the outside of the housing 82 or the power supply case container 42 that has entered the interior of the housing 82 is prevented from obstructing work inside and outside the housing 82.

DESCRIPTION OF SYMBOLS 100 Machine tool 110 Power supply 13 Power supply case 13d Projection piece 14 Backup power supply (rear power supply)
16, 41 Lid 17 Plate support portion 18 Support plate 181 Support hole 22e Y direction encoder (position detection portion)
26e X direction encoder (position detector)
30e Z direction encoder (position detector)
34 Main shaft 82 Housing 821 Rear surface (one surface)
822 opening (first opening)
823 Right side (other side)
824,826 opening (second opening)
83 Door 93 I / O board (distribution part)
94 Control board (control unit)

Claims (4)

A spindle holding the tool,
A control unit for controlling the movement of the spindle;
A position detector for detecting the position of the main spindle by being fed from a power source;
A power supply case that detachably accommodates a rear power supply of the position detection unit;
A support portion for supporting the power supply case;
In a machine tool comprising: a control unit, a power supply case, and a housing containing the support unit.
The housing is
A first opening formed on one side;
A door provided in the first opening;
A second opening formed in the other surface adjacent to the one surface;
A lid provided in the second opening;
When the door is opened, at least the control unit appears,
A machine tool, wherein the power supply case appears when the lid is opened, and at least the power supply case closes the second opening. A plurality of the position detectors are provided,
The housing further accommodates a distribution unit that distributes and supplies the power of the backup power source to the plurality of position detection units,
The machine tool according to claim 1, wherein the distribution unit is disposed on the other surface. The support part is
A support plate in which a support hole for supporting the power supply case is formed;
A plate support portion that protrudes from the inside of the other surface, and has a plate support portion disposed at a tip portion thereof so that the support plate faces the other surface;
The power supply case is provided with a plate-like protruding piece in a direction along the other surface,
The machine tool according to claim 1 or 2, wherein the power supply case is inserted into the support hole so that the protruding piece is positioned between the support plate and the other surface.   The said power supply case and a support part are provided so that advance / immersion is possible with respect to the said housing | casing through the said 2nd opening according to opening / closing of the said lid | cover. Machine Tools.

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