Control board

Abstract

To provide a control board having doors that are opened left and right.SOLUTION: A control board includes a first door which is an openable door openable through a rotation shaft on one of left and right sides of a casing, a second door which is an openable door openable through a rotation shaft on the other of the left and right sides of the casing, a breaker handle disposed on the first door to perform a power-on operation or an interruption operation on a tool machine, a long bar that is fixed to the first door such that when the first door and the second door are closed, the long bar overlaps the second door from the front while extending beyond the width dimension of the second door, and a projection member that is fixed to an inner side of the second door such that when the second door is opened, the projection member hits the long bar to prevent the first door from being closed.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a control panel having a plurality of doors that open to the left and right. [Background technology]

[0002] In machine tools, the control panel door is equipped with an open / close handle and a breaker handle, which is a circuit breaker for wiring, and an interlock mechanism that protects against electric shock from live parts in conjunction with the ON / OFF operation of the breaker handle.In particular, the control panel door cannot be opened unless the power circuit is cut off by the breaker handle. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Publication No. 2023-4702 Summary of the Invention [Problem to be solved by the invention]

[0004] For control panels with breaker handles, the interlock function works effectively if there is only one door, but if there are multiple doors, a different solution is required for the doors that do not have breaker handles.For this reason, electromagnetic locks and door switches have traditionally been installed on doors other than the main door with the breaker handle, which increases costs.

[0005] SUMMARY OF THE INVENTION In order to solve this problem, an object of the present invention is to provide a control panel having a door that opens to the left and right. [Means for solving the problem]

[0006] The control panel of the present invention comprises a first door which is a hinged door that can be opened and closed by a rotating shaft on one of the left and right sides of the housing, a second door which is a hinged door that can be opened and closed by a rotating shaft on the other of the left and right sides of the housing, a breaker handle provided on the first door that operates to turn the power on or off to the machine tool, a long bar fixed to the first door so that when the first and second doors are closed, it overlaps the second door from the front beyond its width dimension, and a protrusion member fixed to the inside of the second door so that when the second door is open, the long bar hits it and prevents the first door from closing. [Effects of the Invention]

[0007] According to the above configuration, the first door is provided with a breaker handle so that the power cannot be turned on unless the first door is securely closed, and even if you try to close the first door, which is a hinged door that can be opened and closed by a rotating shaft on one of the left and right sides of the housing, while the second door, which is a hinged door that can be opened and closed by a rotating shaft on the opposite side, is open, the long bar fixed to the first door will hit the second door or the protruding member fixed to the second door, preventing the first and second doors from closing properly. As a result, it becomes impossible to turn on the power to the control panel by operating the breaker handle with the second door open. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 1 is a rear view of a machine tool equipped with an embodiment of a control panel. [Figure 2] FIG. 2 is a front view (rear of the machine tool) of an embodiment of the control panel. [Figure 3] FIG. 2 is a plan view showing one embodiment of a control panel. [Figure 4] FIG. 10 is a plan view of the control panel showing the first door closed while the second door is open. DETAILED DESCRIPTION OF THE INVENTION

[0009] An embodiment of a control panel according to the present invention will be described below with reference to the drawings. Fig. 1 is a rear view of a machine tool equipped with a control panel according to this embodiment. For example, this machine tool 1 holds a workpiece in a spindle chuck, selects a predetermined tool by indexing, and applies a cutting tool such as a turning tool to the rotating workpiece to perform outer diameter cutting or the like. Since this machine tool 1 is an NC lathe that performs automatic workpiece machining, a control panel 3 is mounted on the rear side and controls the drive of each of the incorporated devices, such as the spindle device and turret device.

[0010] The control panel 3 is mounted at a high position relative to the machine tool 1 installed on the factory floor 10. An installation stand 5 is fixed to a support structure of the machine tool 1, and the control panel 3 is mounted on top of the installation stand 5. Therefore, the installation stand 5 is installed at a height H1 of more than 1000 mm above the factory floor 10, and the control panel 3, with a height H2 of about 1000 mm, is mounted on the installation stand 5. Therefore, the opening and closing handles 13, 14 of the first door 11 and the second door 12 provided on the control panel 3 are attached to the underside of each door so that they are easy for workers to handle.

[0011] FIG. 2 is a view showing the control panel 3 from the front (the rear side of the machine tool 1). FIG. 3 is a plan view showing the control panel 3. The control panel 3 has a first door 11 with a large area arranged on the right side as viewed from the front of the housing 15 so as to cover an opening formed in the front of the housing 15, and a second door 12 with a smaller area arranged on the left side, spaced apart from the first door 11. The first door 11 and the second door 12 are both sized to reach the top and bottom of the housing 15, and in particular, the first door 11 is formed with an area exceeding half of the front. The first door 11 is a hinged door rotatably attached to the right side by three hinges 17 fixed to the right end of the housing 15, and the second door 12 is a hinged door rotatably attached to the left side by three hinges 18 fixed to the left end of the housing 15.

[0012] The first door 11 has a breaker handle 21 provided below the opening / closing handle 13. The breaker handle 21 is configured so that the first door 11 cannot be opened unless the knob is turned in a predetermined direction to cut off the power circuit. The breaker handle 21 also prevents power from being turned on to the control panel 3 unless the first door 11 is securely closed. However, the control panel 3 only has this interlock function on the first door 11, and the second door 12 must be provided with an electromagnetic lock, door switch, etc., as described above.

[0013] In this embodiment, in order to solve these conventional problems, a configuration is adopted in which the opening and closing of the second door 12 is linked to the operation of the breaker handle 21 of the first door 11. First, a long bar 23 is configured integrally with the first door 11 on which the breaker handle 21 is provided. The long bar 23 is an angle iron (L-shaped steel) of a predetermined length, and its end is joined facing the surface of the first door 11, extending horizontally particularly along the upper edge of the first door 11. In other words, when the first door 11 is closed, the long bar 23 extends so as to overlap the closed second door 12 and protrudes from the end of the control panel 3 in the width direction.

[0014] Next, a protruding member 25 is joined to the inside of the second door 12 (toward the interior of the control panel 3). The protruding member 25 is a short angle iron and is fixed near the axis of rotation of the hinges 18 of the second door 12 so as to be perpendicular to it. The protruding member 25 is located near the top end of the second door 12 so as to be at the same height as the long bar 23 when viewed from the front, and is spaced from the axis of rotation so as to fit within the length of the long bar 23 protruding from the control panel 3. That is, the second door 12 is configured so that the protruding member 25 interferes with the long bar 23 even if it is rotated more than approximately 180 degrees from the closed position shown in FIG. 2 as shown in FIG. 4. The control panel 3 is configured so that the second door 12 can only rotate a certain amount even if it exceeds 180 degrees, and the protruding member 25 always protrudes from the front of the housing 15.

[0015] 4 is a plan view of the control panel 3 showing the first door 11 closed while the second door 12 is open. With conventional control panels, it was possible to close the first door 11 even when the second door 12 was open. However, with the control panel 3 of this embodiment, the long bar 23 hits the second door 12 itself or its protruding member 25, making it impossible to completely close the first door 11. Therefore, with the second door 12 open, the breaker handle 21 provided on the first door 11 cannot be operated, and the control panel 3 is not powered on.

[0016] Therefore, the worker must always close the second door 12 first, and then close the first door 11. Then, once the first door 11 is closed, even if the second door 12 is not completely closed, the long bar 23 presses down on the second door 12, ensuring that it is closed. Therefore, with the control panel 3 of this embodiment, even if the second door 12 is left unclosed, the long bar 23 will hit the second door 12 or the protruding member 25 of the second door 12, preventing the first door 11 from being closed. Therefore, the worker will always notice that the second door 12 is open, and will operate the breaker handle 21 with the first door 11 and the second door 12 properly closed.

[0017] As described above, in the machine tool 1 of this embodiment, the long bar 23 of the first door 11 and the protruding member 25 of the second door 12 can provide an interlock function for operating the breaker handle 21. Furthermore, since the operation of closing the first door 11 also closes the second door 12, it is possible to prevent the second door 12 from being left unclosed. Furthermore, if the closed first door 11 is locked, the second door 12 is held down by the long bar 23 and cannot be opened by itself.

[0018] Incidentally, the control panel 3 of this embodiment is equipped with a long bar 23 that is long in the width direction relative to the first door 11, which means that the rotation range of the first door 11 becomes large when the first door 11 is opened or closed. However, the control panel 3 of this embodiment is installed at a high position relative to the machine tool 1, and the long bar 23 itself is also attached at a high position relative to the first door 11. Specifically, the rotation height H3 of the long bar 23 exceeds 2000 mm, so even a very tall worker will not come into contact with the long bar 23 when opening or closing the first door 11. However, to ensure a sufficient distance from the worker, it is preferable to attach a curtain that hangs down to a certain length from the long bar 23 so that the worker can notice the movement of the long bar 23.

[0019] Although one embodiment of the present invention has been described above, the present invention is not limited to this and various modifications are possible without departing from the spirit of the present invention. For example, in the above embodiment, the long bar 23 is set at the highest position, but for safety reasons, it may be set at an intermediate height on the control panel 3 near the opening / closing handle 13. This makes it easier to transmit the force for closing the first door 11 to the second door 12. Furthermore, in the above embodiment, the control panel 3 is provided with two doors on the left and right, but the number of doors may be three or more. [Explanation of symbols]

[0020] 1...machine tool 3...control panel 5...installation stand 11...first door 12...second door 13, 14...opening / closing handle 15...casing 21...breaker handle 23...long bar 25...projecting member

Claims

1. a first door that is a hinged door that can be opened and closed by a rotation shaft on one of the left and right sides of the housing; a second door that is a hinged door that can be opened and closed by a rotation shaft on the other of the left and right sides of the housing; a breaker handle provided on the first door for turning on or off the power to the machine tool; a long bar fixed to the first door so as to overlap the second door from the front side beyond the width dimension of the first door when the first door and the second door are closed; a protrusion member fixed to the inside of the second door so that the long bar will hit the second door when the second door is open, preventing the first door from being closed; A control panel having:

2. 2. The control panel according to claim 1, wherein the long bar presses down the second door in an open state to close the first door when the first door is closed.

3. 3. The control panel according to claim 2, wherein the long bar is an angle iron extending horizontally along the upper edge of the first door and joined to face the surface of the first door.

4. 2. The control panel according to claim 1, wherein the control panel is mounted on an installation stand attached to a support structure of the machine tool, and the long bar and the protruding member are provided on the upper portions of the first door and the second door.

Images