Door device for machine tools and machine tool

Abstract

A door device for a machine tool and a machine tool are provided. The door device for a machine tool includes a door that is slidable between a first position that closes an opening portion of a case that defines an internal region of the machine tool and a second position that opens the opening portion, a handle that is provided to the door, at least one air cylinder that has a first air chamber that imparts a first assist force to the door in a first direction from the first position toward the second position by being supplied with air to the first air chamber, an air flow passage that includes a first flow passage that connects the first air chamber with an air supply source, at least one switching valve that is provided to the air flow passage, and an operation switch that switches a state of the at least one switching valve between a first state in which the door is allowed to move in the first direction or in a second direction from the second position toward the first position without the first assist force and a second state in which the first assist force is imparted to the door in the first direction.

Description

Technical Field

[0001] This invention relates to a door device for machine tools and a machine tool. Background Technology

[0002] An auxiliary device for opening and closing the door of an auxiliary machine tool is known.

[0003] As a related technology, Patent Document 1 discloses a door opening and closing assist device. The door opening and closing assist device described in Patent Document 1 includes: a fluid pressure source; a fluid pressure actuator that applies an auxiliary driving force to assist manual opening and closing actions; an adjustment unit that changes and adjusts the flow rate, direction, or pressure of the working fluid supplied from the fluid pressure source to the fluid pressure actuator; and a door handle that is movable so as to be able to move in the direction in which manual force is applied to open and close the door. The adjustment unit is coupled to the door handle in a manner linked to the operation of the door handle. Furthermore, if the door handle is operated towards the open side, the adjustment unit supplies working fluid to the fluid pressure actuator in the direction for causing the door to open. On the other hand, if the door handle is operated towards the closed side, the adjustment unit supplies working fluid to the fluid pressure actuator in the direction for causing the door to close.

[0004] Patent Document 1: Japanese Patent Application Publication No. 10-61312 Summary of the Invention

[0005] The purpose of this invention is to provide a door device and machine tool for machine tools that takes into account a universal design. When an auxiliary force is needed to assist in opening and closing the door of the machine tool due to factors such as the operator's height, the operator's working posture, the work content, and the position of the door, the auxiliary force can be obtained. Therefore, it is easy to handle any situation, regardless of the operator's posture or the work content.

[0006] Several embodiments of a door device for a machine tool include: a door slidable between a first position with a closed opening of a housing and a second position with the opening open, the housing defining an internal area of ​​the machine tool; a handle disposed on the door; at least one cylinder having a first air chamber, which, by supplying air to the first air chamber, imparts a first auxiliary force to the door in a first direction from the first position toward the second position; an air passage including a first passage connecting the first air chamber to an air supply source; at least one switching valve disposed on the air passage; and an operating switch to switch the state of at least one of the switching valves between a first state and a second state, wherein in the first state, the door is allowed to move in the first direction or from the second position toward the first position in a second direction without the first auxiliary force, and in the second state, the first auxiliary force is imparted to the door in the first direction.

[0007] The machine tool in several embodiments includes: a machining apparatus for machining a workpiece; a workpiece support for supporting the workpiece; a housing surrounding the machining apparatus and the workpiece support, and having an opening; and a door device. The door device includes: a door slidable between a first position with the opening closed and a second position with the opening open; a handle disposed on the door; at least one cylinder having a first air chamber, which, by supplying air to the first air chamber, imparts a first auxiliary force to the door in a first direction from the first position toward the second position; an air passage including a first passage connecting the first air chamber to an air supply source; at least one switching valve disposed on the air passage; and an operating switch to switch the state of at least one of the switching valves between a first state and a second state, wherein in the first state, the door is allowed to move in the first direction or from the second position toward the first position in a second direction without the first auxiliary force, and in the second state, the first auxiliary force is imparted to the door in the first direction.

[0008] According to the present invention, a door device and a machine tool for a machine tool with a universal design can be provided, which can be easily handled regardless of the operator's posture or the nature of the work. Attached Figure Description

[0009] Figure 1 This is a schematic diagram illustrating the door device for a machine tool in the first embodiment. Figure 2 This is a schematic diagram illustrating the door device for a machine tool in the first embodiment. Figure 3 This is a schematic diagram illustrating the door device for a machine tool in the first embodiment. Figure 4 This is a schematic diagram illustrating the door device for a machine tool in the first embodiment. Figure 5 This is a diagram illustrating an example of the configuration of an operating switch. Figure 6 This is another example of a schematic diagram illustrating the configuration of an operating switch. Figure 7 This is a simplified top view illustrating an example of a handle. Figure 8 This is a simplified top view illustrating an example of a handle. Figure 9 This is a diagram that schematically illustrates a variation of the operation switch. Figure 10 This is a schematic diagram illustrating a door device for a machine tool in a first variation of the first embodiment. Figure 11This is a schematic diagram illustrating a door device for a machine tool in a second variation of the first embodiment. Figure 12 This is a diagram illustrating an example of a control flow representing the action of at least one switching valve. Figure 13 This is a diagram illustrating an example of a control flow representing the action of at least one switching valve. Figure 14 This is a schematic diagram illustrating the door device for a machine tool in the second embodiment. Figure 15 This is a schematic diagram illustrating the door device for a machine tool in the second embodiment. Figure 16 This is a schematic diagram illustrating the door device for a machine tool in the second embodiment. Figure 17 This is a diagram schematically illustrating an example of the configuration of the movable pulley and / or the first cylinder. Figure 18 This is a simplified perspective view schematically representing the machine tool in the third embodiment. Detailed Implementation

[0010] The door device 1 for the machine tool and the machine tool 100 in the embodiments will be described below with reference to the accompanying drawings. In addition, in the following description of the embodiments, parts and components with the same function will be labeled with the same reference numerals, and repeated descriptions of parts and components labeled with the same reference numerals will be omitted.

[0011] (First Implementation) Reference Figures 1 to 13 This describes the door device 1A for the machine tool in the first embodiment. Figures 1 to 4 This is a schematic diagram illustrating the door device 1A for a machine tool in the first embodiment. Figure 5 This is a diagram illustrating an example of the configuration of operating switch 6. Figure 6 This is another example of a schematic representation of the configuration of operating switch 6. Figure 7 and Figure 8 This is a simplified top view schematically representing an example of handle 3. Figure 9 This is a schematic diagram illustrating a variation of the operation switch 6. Figure 10 This is a schematic diagram illustrating the door device 1A for a machine tool in a first variation of the first embodiment. Figure 11 This is a schematic diagram illustrating a door device 1A for a machine tool in a second variation of the first embodiment. Figure 12 and Figure 13 This is a diagram illustrating an example of a control flow that schematically represents the action of at least one switching valve 5.

[0012] like Figure 1As illustrated, the door device 1A in the first embodiment includes a door 2, a handle 3, at least one cylinder 4, an air passage FP, at least one switching valve 5, and an operating switch 6.

[0013] Door 2 can be closed at the first position Q1 of the opening OP of housing 110 (refer to...) Figure 1 ) and the second position Q2 of the open opening OP (refer to Figure 3 The door 2 can slide between the first position Q1 and the second position Q2, and the housing 110 is used to define the internal area of ​​the machine tool. When the direction from the first position Q1 to the second position Q2 is defined as the first direction DR1, and the direction from the second position Q2 to the first position Q1 is defined as the second direction DR2, the door 2 can slide in the first direction DR1 and can slide in the second direction DR2. Figure 1 In the recorded examples, the first direction DR1 and the second direction DR2 are directions parallel to the horizontal direction.

[0014] Handle 3 is disposed on door 2. Handle 3 can be a handle installed on door 2, or it can be a recess set in part of door 2. Figure 1 In the recorded example, by operating handle 3 in the first direction DR1, door 2 moves from the first position Q1 towards the second position Q2. Furthermore, Figure 3 In the recorded example, by operating the handle 3 in the second direction DR2 (in other words, the opposite direction to the first direction DR1), the door 2 moves from the second position Q2 toward the first position Q1.

[0015] At least one cylinder 4 has a first air chamber 41A. The at least one cylinder 4 imparts a first auxiliary force to the door 2 in a first direction DR1 by supplying air to the first air chamber 41A. Figure 1 In the recorded example, air can be supplied from air supply source 91 to the first air chamber 41A.

[0016] At least one cylinder 4 may also have a second air chamber 43A. At least one cylinder 4 provides a second auxiliary force to the door 2 in the second direction DR2 by supplying air to the second air chamber 43A. Figure 1 In the recorded example, air can be supplied from air supply source 91 to the second air chamber 43A.

[0017] Figure 1 In the described example, at least one cylinder 4 includes a first cylinder 4A. Furthermore, the first cylinder 4A has both a first air chamber 41A and a second air chamber 43A.

[0018] The airflow channel FP includes a first flow channel FP1 connecting the first air chamber 41A to the air supply source 91. The airflow channel FP may also include a second flow channel FP2 connecting the second air chamber 43A to the air supply source 91. For example... Figure 1As illustrated, a portion of the first flow channel FP1 can also be interchanged with a portion of the second flow channel FP2. Figure 1 In the example described, the portion of the first flow channel FP1 located between the air supply source 91 and the switching valve 5, and the portion of the second flow channel FP2 located between the air supply source 91 and the switching valve 5, are interchangeable. Alternatively, the first flow channel FP1 and the second flow channel FP2 can be completely independent of each other. Figure 1 In the documented example, at least one switching valve 5 is configured in the airflow channel FP.

[0019] Operation switch 6 Figure 1 The first state shown is Figure 2 The state of at least one switching valve 5 is switched between the illustrated second states.

[0020] exist Figure 1 In the first state illustrated, the gate 2 is allowed to move in either the first direction DR1 or the second direction DR2 without the first auxiliary force. Figure 1 In the described example, at least one switching valve 5, in the first state described above, fluidly connects the first atmospheric opening E1, which opens the air inside the first air chamber 41A, to the first air chamber 41A. In this case, if the operator operates the handle 3 in the first direction DR1, the door 2 moves from the first position Q1 to the second position Q2 without the first auxiliary force. Additionally, as... Figure 1 As illustrated, at least one switching valve 5 can also fluidly connect the second atmospheric opening E2, which opens the air inside the second air chamber 43A, to the second air chamber 43A in the first state described above.

[0021] exist Figure 2 In the second state illustrated, a first auxiliary force is applied to door 2 in the first direction DR1. Figure 2 In the described example, at least one switching valve 5, in the second state described above, fluidly connects the air supply source 91 to the first air chamber 41A to supply air to the first air chamber 41A. In this case, if the operator operates the handle 3 in the first direction DR1, the door 2 moves from the first position Q1 to the second position Q2 using the combined force of the first auxiliary force and the operator's operating force. Additionally, as... Figure 2 As illustrated, at least one switching valve 5 can also fluidly connect the second atmospheric opening E2 to the second air chamber 43A in the second state described above.

[0022] In the first embodiment, the machine tool door device 1A can switch between a first state where the door 2 can move in a first direction DR1 or a second direction DR2 without the first auxiliary force, and a second state where the first auxiliary force is applied to the door 2 in the first direction DR1. Therefore, in the first embodiment, a machine tool door device 1A is provided that is easy to use for both operators requiring and not requiring auxiliary force. More specifically, a machine tool door device 1A is provided that incorporates a universal design so that it is easy to handle regardless of the operator's posture or the type of work being performed. Furthermore, since the machine tool door device 1A in the first embodiment has an operation switch 6 that switches between the aforementioned first state and the aforementioned second state, the operator can select either the first state or the second state as desired. For example, an operator not requiring auxiliary force can open the door 2 in the same way as a normal door without auxiliary function by selecting the first state, without reducing work efficiency. Furthermore, an operator requiring auxiliary force can open the door 2 with less force by selecting the second state.

[0023] Furthermore, in the first state mentioned above (refer to...) Figure 1 Under these conditions, the air chamber of cylinder 4 is fluidly connected to the atmospheric opening. Therefore, even if the power source is cut off (more specifically, if air cannot be supplied from the air supply source 91 to the air passage FP), the door 2 can move freely in the first direction DR1 or the second direction DR2.

[0024] In the second state described above (refer to) Figure 2 In this configuration, the second air chamber 43A of cylinder 4 can also be fluidly connected to the second atmospheric opening E2. In this case, by increasing the operating force applied to the handle 3 in the first direction DR1, the moving speed of door 2 can be increased. In other words, as long as the air supply rate to the first air chamber 41A does not reach its limit, the presence of the auxiliary force mechanism will not hinder the increase in the moving speed of door 2. In this configuration, both the operator's use of auxiliary force and the ability to quickly open door 2 can be achieved.

[0025] also, Figure 1 and Figure 2 In the described example, door 2, which is in the first position Q1, can be moved to any position between the first position Q1 and the second position Q2, and stop at said arbitrary position. Furthermore, Figure 1 and Figure 2In the described example, if the door 2, which is stopped at any position between the first position Q1 and the second position Q2, is moved again, the operator can move the door 2 without the first auxiliary force. Furthermore, if the door 2, which is stopped at any position between the first position Q1 and the second position Q2, is moved again, the operator can use the first auxiliary force to move the door 2 by operating the operating switch 6.

[0026] (arbitrarily added structures) Next, refer to Figures 1 to 13 This describes any additional structures that can be used in the door device 1A for the machine tool in the first embodiment or the door device 1B for the machine tool in the second embodiment described later.

[0027] (Magnitude of the first auxiliary force) The magnitude of the first auxiliary force can also be less than the force required to slide the door 2. In other words, the magnitude of the first auxiliary force can also be set to a level that prevents the door 2 from moving in the first direction DR1 using only the first auxiliary force. In this case, even when the first auxiliary force is applied, the position of the door 2 will not change but will remain as long as the operator does not apply force to the handle 3. Alternatively, the magnitude of the first auxiliary force can also be set to a level that allows the door 2 to move slowly in the first direction DR1 using only the first auxiliary force. For example, the magnitude of the first auxiliary force can be adjusted by changing the first set pressure of the first regulator 71, which will be described later.

[0028] (The granting of a second auxiliary force) Figure 3 In the described example, at least one cylinder 4 (more specifically, the first cylinder 4A) has a second air chamber 43A. At least one cylinder 4, by supplying air to the second air chamber 43A, can impart a second auxiliary force to the door 2 in the second direction DR2. To enable the supply of air to the second air chamber 43A, the air passage FP includes a second passage FP2 connecting the second air chamber 43A to the air supply source 91.

[0029] Operating switch 6 allows door 2 to move in either the first direction DR1 or the second direction DR2 without the first or second auxiliary force (see the first state). Figure 3 ), and the third state in which the second auxiliary force is applied to the second direction DR2 of the door 2 (refer to Figure 4 Switch the state of at least one switching valve 5 between ) .

[0030] exist Figure 3 In the first state illustrated, it is permissible for door 2 to move in the first direction DR1 or the second direction DR2 without the presence of the first auxiliary force and the second auxiliary force. Figure 3In the described example, at least one switching valve 5, in the first state described above, fluidly connects the first atmospheric opening E1, which opens the air inside the first air chamber 41A, to the first air chamber 41A, and fluidly connects the second atmospheric opening E2, which opens the air inside the second air chamber 43A, to the second air chamber 43A. In this case, if the operator operates the handle 3 in the second direction DR2, the door 2 moves from the second position Q2 toward the first position Q1 without any second auxiliary force.

[0031] exist Figure 4 In the illustrated third state, a second auxiliary force is applied to door 2 in the second direction DR2. Figure 4 In the described example, at least one switching valve 5, in the aforementioned third state, fluidly connects the first atmospheric opening E1 to the first air chamber 41A and fluidly connects the air supply source 91 to the second air chamber 43A. In this case, if the operator operates the handle 3 in the second direction DR2, the door 2 moves from the second position Q2 toward the first position Q1 using the combined force of the second auxiliary force and the operator's operating force.

[0032] Figure 3 In the recorded examples, operators who do not require assistance can close door 2 in the same way as a normal door without assistance by selecting the first state, without reducing work efficiency. Furthermore, operators who require assistance can close door 2 with less force by selecting the third state.

[0033] Furthermore, in the aforementioned third state (refer to...) Figure 4 In this configuration, the first air chamber 41A of cylinder 4 is fluidly connected to the first atmospheric opening E1. Therefore, by increasing the operating force applied to handle 3 in the second direction DR2, the moving speed of door 2 can be increased. Thus, it is possible to balance the operator's ability to use auxiliary force and to quickly close door 2.

[0034] also, Figure 3 and Figure 4 In the described example, door 2, which is in the second position Q2, can be moved to any position between the second position Q2 and the first position Q1, and stop at said arbitrary position. Furthermore, Figure 3 and Figure 4 In the described example, when the door 2, which is stopped at any position between the second position Q2 and the first position Q1, is moved again, the operator can move the door 2 without the first auxiliary force or the second auxiliary force. Furthermore, when the door 2, which is stopped at any position between the second position Q2 and the first position Q1, is moved again, the operator can operate the operating switch 6 to move the door 2 in the first direction DR1 or the second direction DR2 using either the first auxiliary force or the second auxiliary force.

[0035] (Magnitude of the second auxiliary force) The magnitude of the second auxiliary force can also be less than the force required to slide the door 2. In other words, the magnitude of the second auxiliary force can also be set to a level that prevents the door 2 from moving in the second direction DR2 using only the second auxiliary force. In this case, even when the second auxiliary force is applied, the position of the door 2 will not change but will remain as long as the operator does not apply force to the handle 3. Alternatively, the magnitude of the second auxiliary force can also be set to a level that allows the door 2 to move slowly in the second direction DR2 using only the second auxiliary force. For example, the magnitude of the second auxiliary force can be adjusted by changing the second set pressure of the second regulator 72, which will be described later.

[0036] (Operate switch 6) Figures 1 to 4 In the recorded example, all operations of switch 6 can be performed independently of operations of handle 3. In other words, Figures 1 to 4 In the described example, the operation of the operating switch 6 is performed without being linked to the operation of the handle 3. In this case, there is greater flexibility in the timing of switching between the first state and the second state (or the third state) described above. For example, before operating the handle 3 in the first direction DR1 (or the second direction DR2), the state of the switching valve 5 can be switched from the first state to the second state with auxiliary force (or the third state with auxiliary force) by operating the operating switch 6. Furthermore, during the movement of the door 2, the state of the switching valve 5 can be switched from the second state or the third state to the first state without auxiliary force by operating the operating switch 6 (e.g., by removing a finger from the operating switch 6). In other words, the auxiliary force can be used until the moving speed of the door 2 reaches a predetermined speed, and then the use of the auxiliary force can be stopped.

[0037] Figure 5 In the described example, the operating switch 6 is positioned on the handle 3 in a manner that allows for simultaneous manipulation of the handle 3 by hand and operation of the operating switch 6 by the fingers (e.g., thumb) holding the handle 3. Therefore, the actions of holding the handle 3 and operating the operating switch 6 can essentially be performed simultaneously. Thus, the operation of both the handle 3 and the operating switch 6 can be performed efficiently.

[0038] When the direction perpendicular to the main surface 25 of door 2 and from the inside of door 2 toward the outside of door 2 is defined as the third direction DR3, Figure 5 In the described example, the operating switch 6 is located on the third direction DR3 side face 31f of the handle 3 (in other words, the front side face). Alternatively, when the direction pointing vertically upward is defined as the fourth direction DR4, as... Figure 6 As illustrated, the operating switch 6 can also be disposed on the surface 31u of the handle 3 in the fourth direction DR4 (in other words, the upper surface of the handle 3). Figure 6 In the recorded example, it is also possible to simultaneously operate the switch 6 by holding the handle 3 with one's hand and by using the fingers (e.g., thumb) holding the handle 3.

[0039] Figure 5 and Figure 6 In the recorded example, a hole 3h is formed between the handle 3 and the door 2, which allows the operator's four fingers (i.e., index finger, middle finger, ring finger, and little finger) to be inserted. Figure 5 and Figure 6 In the recorded example, the operating switch 6 is positioned on the handle 3 so that the operator can operate the operating switch 6 with the remaining thumb while the operator's four fingers are inserted into the hole for 3 hours.

[0040] like Figure 5 and Figure 6 As illustrated, the operating part 60 of the operating switch 6 (in other words, the part operated by the operator) can also be configured to protrude from the outer surface 31 of the handle 3. In this case, the operation of the operating part 60 is easy. Figure 5 In the described example, the operating part 60 protrudes from the surface 31f on the third-party side of the handle 3 toward DR3. Furthermore, Figure 6 In the example described, the operating part 60 protrudes from the surface 31u on the fourth direction DR4 side of the handle 3 toward the fourth direction DR4.

[0041] Figure 5 and Figure 6 In the example described, handle 3 is a fixed handle installed in a manner that prevents it from moving relative to door 2. Alternatively, handle 3 can also be a movable handle installed on door 2 in a manner that allows it to move relative to door 2 (e.g., it can swing about a pivot axis).

[0042] Figure 7 In the described example, the operating switch 6 includes a first operating part 61 that switches the state of at least one switching valve 5 from the first state to the second state, and a second operating part 62 that switches the state of at least one switching valve 5 from the first state to the third state. Furthermore, the first operating part 61 is configured to be positioned further away from the first direction DR1 side than the second operating part 62. In this case, the operator can apply a first auxiliary force in the first direction DR1 to the door 2 by operating the first operating part 61 configured on the first direction DR1 side. Furthermore, the operator can apply a second auxiliary force in the second direction DR2 to the door 2 by operating the second operating part 62 configured on the second direction DR2 side.

[0043] Figure 7In the described example, the operation part 60, which includes the first operation part 61 and the second operation part 62, is supported by the operation part support member 64 so that it can swing about the first axis AT1, which is perpendicular to the first direction DR1. Figure 7 In the described example, a portion of the operating part support member 64 is embedded in the handle 3, and another portion of the operating part support member 64 protrudes from the outer surface 31 of the handle 3. Figure 7 In the example described, the first axis AT1 is positioned on the outside of the handle 3. Alternatively, the first axis AT1 can also be configured to cut across the handle 3.

[0044] exist Figure 7 In the described example, if the first operating part 61 is pressed, the operating part 60 tilts and moves from the default position (in other words, the neutral position) toward the first operating position in the first rotational direction R1 about the first axis AT1 (see reference). Figure 8 If the operating unit 60 is tilted and moved to the first operating position, the state of at least one switching valve 5 changes from the first state to the second state. Conversely, if the second operating unit 62 is pressed, the operating unit 60 tilts and moves from the default position (in other words, the neutral position) toward the second operating position in a second rotational direction R2 about the first axis AT1 (in other words, the direction opposite to the first rotational direction R1). If the operating unit 60 is tilted and moved to the second operating position, the state of at least one switching valve 5 changes from the first state to the third state.

[0045] The preferred operating unit 60 is configured to automatically return to the default position from the first operating position (or the second operating position). In other words, the preferred operating unit 60 is subjected to force by a force-applying member such as a spring in the direction from the first operating position (or the second operating position) toward the default position. In this case, the operating unit 60 automatically returns to the default position from the first operating position (or the second operating position) by the operator removing their finger from the operating unit 60. If the operating unit 60 of the operating switch 6 returns to the default position, the state of the switching valve 5 returns from the second state or the third state described above to the first state.

[0046] Figure 8 In the example described, the operating switch 6 is a switch that changes the state of the switching valve 5 simply by operating the operating part 60. Alternatively, the operating switch 6 could also be a switch that changes the state of the switching valve 5 by operating both the operating part 60 and the handle 3. Figure 9In the described example, if the operating part 60 is pressed and an operating force of DR1 is applied to the handle 3 in the first direction, the state of the switching valve 5 changes from the first state to the second state. On the other hand, if the operating part 60 is pressed and an operating force of DR2 is applied to the handle 3 in the second direction, the state of the switching valve 5 changes from the first state to the third state. Furthermore, if an operating force of DR1 or DR2 is applied to the handle 3 when the operating part 60 is not pressed, the state of the switching valve 5 remains in the first state.

[0047] Figure 9 In the described example, a portion of the operation of the operating switch 6 (more specifically, the operation of the operating unit 60) can be performed independently of the operation of the handle 3. In this case, there is greater freedom in determining the timing of switching between the first state and the second (or third) state. For example, during the movement of the door 2, by operating the operating unit 60 (e.g., by removing a finger from the operating unit 60), the state of the switching valve 5 can be switched from the second or third state to the first state without auxiliary force.

[0048] Figure 9 In the described example, if an operating force of DR1 in the first direction or DR2 in the second direction is applied to the handle 3, the handle 3 will move relative to the door 2. In this case, the first sensor 66a (e.g., a first proximity sensor) that detects the relative movement of the handle 3 relative to the door 2 can be used to detect whether the handle 3 is subjected to an operating force of DR1 in the first direction. Alternatively, the second sensor 66b (e.g., a second proximity sensor) that detects the relative movement of the handle 3 relative to the door 2 can be used to detect whether the handle 3 is subjected to an operating force of DR2 in the second direction.

[0049] Alternatively, a load sensor embedded in the handle 3 can be used to detect whether the handle 3 is subjected to an operating force in the first direction DR1 or the second direction DR2.

[0050] Figures 1 to 9 In the described example, the switching valve 5 is configured such that when the operating unit 60 is released from its second or third state, the switching valve 5 returns to its first state. Alternatively, it can be configured such that when the switching valve 5 is in its second or third state, the switching valve 5 remains in its second or third state even after the operating unit 60 is released. In other words, the switching valve 5 can remain in its second or third state as long as the operating unit 60 is not actively operated.

[0051] (Switching valve 5) Preferably, at least one switching valve 5 is in a first state by default. More specifically, it is preferable that the switching valve 5 remains in the first state when the power supply to it is cut off. In this case, when the power is cut off (e.g., during a power outage), the door 2 can move freely in either the first direction DR1 or the second direction DR2.

[0052] The switching valve 5 is, for example, a solenoid valve. In this case, if the solenoid of the switching valve 5 is energized, the state of the switching valve 5 switches from the first state to the second state (or the third state). Furthermore, if the solenoid of the switching valve 5 is de-energized, the state of the switching valve 5 remains in the first state. Figure 1 In the described example, the switching valve 5 has a first solenoid 51 and a second solenoid 52. If the operating part 60 of the operating switch 6 is first operated in a manner toward the first operating position, the first solenoid 51 is energized. When the first solenoid 51 is energized, the state of the switching valve 5 switches from the first state to the second state (see reference). Figure 2 If the operating part 60 of the operating switch 6 is operated in a second manner toward the second operating position, the second solenoid 52 is energized. If the second solenoid 52 is energized, the state of the switching valve 5 changes from the first state to the third state (see reference). Figure 4 Furthermore, when the operating part 60 of the operating switch 6 is in the default position, the state of the switching valve 5 remains in the first state.

[0053] Figure 1 In the recorded example, a switching valve 5 is used to switch between the first and second states, as well as between the first and third states. More specifically, (1) as Figure 1 As illustrated, the switching valve 5 can achieve a non-auxiliary state in which the first air chamber 41A is fluidly connected to the first atmospheric opening E1 and the second air chamber 43A is fluidly connected to the second atmospheric opening E2, (2) as Figure 2 As illustrated, the switching valve 5 can achieve a first auxiliary state in which the first air chamber 41A is fluidly connected to the air supply source 91 and the second air chamber 43A is fluidly connected to the second atmospheric opening E2, (3) as Figure 4 As illustrated, the switching valve 5 can achieve a second auxiliary state in which the first air chamber 41A is fluidly connected to the first atmospheric opening E1 and the second air chamber 43A is fluidly connected to the air supply source 91.

[0054] Alternatively, such as Figure 10 As illustrated, multiple switching valves 5 can also be used to switch between the first state and the second state (or between the first state and the third state). Figure 10In the described example, at least one switching valve 5 includes a first switching valve 5A and a second switching valve 5B. The first switching valve 5A is disposed in a first flow channel FP1 that connects the first air chamber 41A to the air supply source 91, and the second switching valve 5B is disposed in a second flow channel FP2 that connects the second air chamber 43A to the air supply source 91.

[0055] exist Figure 10 In the described example, a first switching valve 5A and a second switching valve 5B are used to achieve a first state in which the door 2 is allowed to move in the first direction DR1 or the second direction DR2 without the first auxiliary force or the second auxiliary force. More specifically, in the first state, the first switching valve 5A maintains fluid communication between the first air chamber 41A and the first atmospheric opening E1, and the second switching valve 5B maintains fluid communication between the second air chamber 43A and the second atmospheric opening E2. When the multiple switching valves 5, including the first switching valve 5A and the second switching valve 5B, are in the first state, if the operator operates the handle 3 in the first direction DR1 (or the second direction DR2), the door 2 moves in the first direction DR1 (or the second direction DR2) without the first auxiliary force.

[0056] exist Figure 10 In the described example, a second state is achieved by using a first switching valve 5A and a second switching valve 5B to apply a first auxiliary force to the door in the first direction DR1. More specifically, in the second state, the first switching valve 5A fluidly connects the first air chamber 41A to the air supply source 91 by supplying air to the first air chamber 41A, and the second switching valve 5B fluidly connects the second air chamber 43A to the second atmospheric opening E2. When the multiple switching valves 5, including the first switching valve 5A and the second switching valve 5B, are in the second state, if the operator operates the handle 3 in the first direction DR1, the door 2 moves in the first direction DR1 using the combined force of the first auxiliary force and the operator's operating force.

[0057] exist Figure 10 In the described example, a third state is achieved by using a first switching valve 5A and a second switching valve 5B to apply a second auxiliary force to the door in the second direction DR2. More specifically, in the third state, the first switching valve 5A fluidly connects the first air chamber 41A to the first atmospheric opening E1, and the second switching valve 5B fluidly connects the second air chamber 43A to the air supply source 91 by supplying air to the second air chamber 43A. When the multiple switching valves 5, including the first switching valve 5A and the second switching valve 5B, are in the third state, if the operator operates the handle 3 in the second direction DR2, the door 2 moves in the second direction DR2 using the combined force of the second auxiliary force and the operator's operating force.

[0058] (Cylinder 4) Figure 1In the described example, at least one cylinder 4 includes a first cylinder 4A. The first cylinder 4A has a first air chamber 41A, a second air chamber 43A, and a first piston 44A disposed between the first air chamber 41A and the second air chamber 43A. The first cylinder 4A may also have a first rod 45A connected to the first piston 44A.

[0059] Figure 1 In the described example, the first cylinder 4A has a first air chamber 41A that can be connected to the air supply source 91 via a first flow channel FP1, and a second air chamber 43A that can be connected to the air supply source 91 via a second flow channel FP2. The first piston 44A is driven by the pressure difference between the first air chamber 41A and the second air chamber 43A. The first rod 45A moves together with the first piston 44A. The first rod 45A is directly connected to the door 2, or indirectly connected to the door 2 via mechanical transmission components such as belts, wires, cables, or gears.

[0060] Figure 1 In the described example, when at least one switching valve 5 is in the first state, the first air chamber 41A is fluidly connected to the first atmospheric opening E1, and the second air chamber 43A is fluidly connected to the second atmospheric opening E2. Therefore, in response to the movement of the gate 2 in the first direction DR1 or the second direction DR2, the first piston 44A and the first rod 45A can move relative to the main body 40A of the first cylinder 4A without substantial resistance. Figure 2 In the described example, when at least one switching valve 5 is in the second state, the first air chamber 41A is fluidly connected to the air supply source 91, and the second air chamber 43A is fluidly connected to the second atmospheric opening E2. Therefore, a first auxiliary force in the first direction DR1 is applied to the door 2. Furthermore, Figure 4 In the described example, when at least one switching valve 5 is in the third state, the second air chamber 43A is fluidly connected to the air supply source 91, and the first air chamber 41A is fluidly connected to the first atmospheric opening E1. Therefore, a second auxiliary force is applied to the door 2 in the second direction DR2.

[0061] Figure 1 In the recorded example, the number of cylinders that impart the first or second auxiliary force to door 2 is one. Alternatively, as... Figure 11 As illustrated, the number of cylinders that impart a first auxiliary force or a second auxiliary force to door 2 can also be two or more. In other words, at least one cylinder 4 that imparts a first auxiliary force or a second auxiliary force to door 2 can also include a first cylinder 4A and a second cylinder 4B.

[0062] exist Figure 11In the described example, the first cylinder 4A has a first air chamber 41A, a third air chamber 41B, a first piston 44A disposed between the first air chamber 41A and the third air chamber 41B, and a first rod 45A connected to the first piston 44A. Furthermore, the second cylinder 4B has a second air chamber 43A, a fourth air chamber 43B, a second piston 44B disposed between the second air chamber 43A and the fourth air chamber 43B, and a second rod 45B connected to the second piston 44B.

[0063] Figure 11 In the example described, the first cylinder 4A has a first air chamber 41A that can be connected to the air supply source 91 via a first flow channel FP1, and the second cylinder 4B has a second air chamber 43A that can be connected to the air supply source 91 via a second flow channel FP2. Figure 11 In the described example, when the door 2 applies a first auxiliary force in the first direction DR1, the first air chamber 41A connected to the air supply source 91 is configured in the first cylinder 4A; when the door 2 applies a second auxiliary force in the second direction DR2, the second air chamber 43A connected to the air supply source 91 is configured in the second cylinder 4B. In the first embodiment, as... Figure 1 As illustrated, the first air chamber 41A and the second air chamber 43A can be configured in a first cylinder 4A, or as... Figure 11 As illustrated, the first air chamber 41A and the second air chamber 43A are distributed in multiple cylinders (4A, 4B).

[0064] (Airflow Channel FP) Figure 1 , Figure 10 , Figure 11 In the documented example, the airflow channel FP includes a first flow channel FP1 that fluidly connects the first air chamber 41A to the air supply source 91. Figure 1 , Figure 11 In the example described, a switching valve 5 is configured in the first flow channel FP1. Figure 10 In the example described, a first switching valve 5A is configured in the first flow channel FP1.

[0065] Figure 1 , Figure 10 , Figure 11 In the documented example, the airflow channel FP includes a second flow channel FP2 that fluidly connects the second air chamber 43A to the air supply source 91. Figure 1 , Figure 11 In the example described, a switching valve 5 is configured in the second flow channel FP2. Figure 10 In the example described, a second switching valve 5B is configured in the second flow channel FP2.

[0066] Figure 1 , Figure 10 , Figure 11 In the documented example, the airflow channel FP includes a third flow channel FP3 that fluidly connects the first air chamber 41A to the first atmospheric opening E1. Figure 1 , Figure 11 In the recorded example, a switching valve 5 is configured in the third flow channel FP3. Figure 10 In the example described, a first switching valve 5A is configured in the third flow channel FP3. A portion of the third flow channel FP3 may also be interchangeable with a portion of the first flow channel FP1 (e.g., the flow channel between the first air chamber 41A and the switching valve 5 is interchangeable).

[0067] Figure 1 , Figure 10 , Figure 11 In the documented example, the airflow channel FP includes a fourth flow channel FP4 that fluidly connects the second air chamber 43A to the second atmospheric opening E2. Figure 1 , Figure 11 In the recorded example, a switching valve 5 is configured in the fourth flow channel FP4. Figure 10 In the example described, a second switching valve 5B is configured in the fourth flow channel FP4. A portion of the fourth flow channel FP4 may also be interchangeable with a portion of the second flow channel FP2 (e.g., the flow channel between the second air chamber 43A and the switching valve 5 is interchangeable). Figure 1 , Figure 10 , Figure 11 In the example described, the second atmospheric opening E2 is a different atmospheric opening from the first atmospheric opening E1. Alternatively, the second atmospheric opening E2 and the first atmospheric opening E1 can be used interchangeably.

[0068] Figure 11 In the recorded example, the airflow channel FP includes a fifth flow channel FP5 that fluidly connects the third air chamber 41B to the third atmospheric opening E3, and a sixth flow channel FP6 that fluidly connects the fourth air chamber 43B to the fourth atmospheric opening E4.

[0069] Figure 1 , Figure 10 , Figure 11 In the described example, the air supply source 91 supplying air to the first air chamber 41A is the same as the air supply source 91 supplying air to the second air chamber 43A. Alternatively, the air supply sources supplying air to the first air chamber 41A and the second air chamber 43A may be different. In other words, the door device 1A may have two or more air supply sources. The air supply source 91 may be an air pump or a compressor.

[0070] (First regulator 71) Figure 1 , Figure 10 , Figure 11In the described example, the door device 1A has a first regulator 71 for adjusting the pressure of the air supplied to the first air chamber 41A. The first regulator 71 is disposed in the first flow channel FP1 (more specifically, the flow channel between the switching valve 5 and the first air chamber 41A). The first regulator 71 adjusts the pressure of the air supplied to the first air chamber 41A to a first set pressure. The first regulator 71 can also be a reverse regulator that allows air to flow from the first air chamber 41A toward the switching valve 5 (in other words, a regulator with a reverse flow function).

[0071] (Second regulator 72) Figure 1 , Figure 10 , Figure 11 In the described example, the door device 1A has a second regulator 72 for adjusting the pressure of the air supplied to the second air chamber 43A. The second regulator 72 is disposed in the second flow channel FP2 (more specifically, the flow channel between the switching valve 5 and the second air chamber 43A). The second regulator 72 adjusts the pressure of the air supplied to the second air chamber 43A to a second set pressure. The second set pressure can be set to the same value as the first set pressure described above, or it can be set to a different value. The second regulator 72 can also be a reverse regulator that allows air to flow from the second air chamber 43A toward the switching valve 5 (in other words, a regulator with a reverse flow function).

[0072] When the door device 1A is equipped with a first adjuster 71 and a second adjuster 72 that is different from the first adjuster 71, even if the auxiliary force required for the opening action of the door 2 is different from the auxiliary force required for the closing action of the door 2 due to the configuration and shape of the door 2 of the machine tool, the auxiliary force required for each action can be set independently.

[0073] (Control device 8) The door device 1A may also have a control device 8 that controls the action of at least one switching valve 5. Figure 1 In the described example, the control device 8 receives an operation detection signal from the operation switch 6 indicating that the operation switch 6 has been operated, and sends a control signal to at least one switching valve 5.

[0074] The operating switch 6 corresponds to the first operation being performed, sending a first operation detection signal to the control device 8. If the control device 8 receives the first operation detection signal indicating that the operating switch 6 has been operated, it sends a first control signal to at least one switching valve 5, switching the state of the at least one switching valve 5 from a first state to a second state. In the case where at least one switching valve 5 has a first solenoid 51, the first control signal may also include a control command for energizing the first solenoid 51. Alternatively, the first control signal may also be the current itself energizing the first solenoid 51. If the first solenoid 51 is energized, the state of at least one switching valve 5 is switched to the second state, causing the air supply source 91 to be fluidly connected to the first air chamber 41A.

[0075] The control device 8 can also be configured to return the state of at least one switching valve 5 from the second state to the first state if it continuously receives the first operation detection signal for a period exceeding the first threshold. In this case, it prevents the first auxiliary force from being continuously applied due to malfunctions of the operating switch 6, etc. The control device 8 can also be configured to issue an alarm if it continuously receives the first operation detection signal for a period exceeding the first threshold. The alarm may include the issuance of a warning sound, the illumination of a warning light, or the display of a warning message.

[0076] The operating switch 6 corresponds to the second operation being performed, sending a second operation detection signal to the control device 8. The control device 8 is configured to, upon receiving the second operation detection signal indicating that the operating switch 6 has been subjected to the second operation, send a second control signal to at least one switching valve 5, switching the state of the at least one switching valve 5 from a first state to a third state. In the case where at least one switching valve 5 has a second solenoid 52, the second control signal may also include a control command for energizing the second solenoid 52. Alternatively, the second control signal may also be the current itself energizing the second solenoid 52. If the second solenoid 52 is energized, the state of at least one switching valve 5 is switched to the third state, causing the air supply source 91 to be fluidly connected to the second air chamber 43A.

[0077] The control device 8 can also be configured to return the state of at least one switching valve 5 from the third state to the first state if a second operation detection signal is continuously received during a period exceeding the second threshold. In this case, the continuous application of the second auxiliary force due to malfunctions of the operating switch 6 is prevented. The control device 8 can also be configured to issue an alarm if a second operation detection signal is continuously received during a period exceeding the second threshold. The second threshold is, for example, set to the same value as the first threshold.

[0078] Corresponding to the operation section 60 of the operation switch 6 returning to the default position, the signal from the operation switch 6 to the control device 8 is interrupted. Alternatively, corresponding to the operation section 60 of the operation switch 6 returning to the default position, the operation switch 6 may send a third operation detection signal to the control device 8. In response to the interruption of signal reception from the operation switch 6 (or in response to receiving the third operation detection signal), the control device 8 sends a third control signal to at least one switching valve 5. Instead of sending a third control signal to at least one switching valve 5, the control device 8 may also stop sending control signals to at least one switching valve 5. If at least one switching valve 5 receives the third control signal (or, if the reception of control signals is interrupted), the state of at least one switching valve 5 is returned to the first state.

[0079] In the above example, the control device 8 controls the operation of at least one switching valve 5. Alternatively, the operation of the operating switch 6 can also directly reflect the operation of the switching valve 5. More specifically, the operating switch 6 can be configured to be electrically connected to the switching valve 5 via a circuit, and the operation of the operating switch 6 can change the state of the circuit. Furthermore, the first solenoid 51 or the second solenoid 52 of the switching valve 5 can be driven in response to changes in the state of the circuit.

[0080] Next, refer to Figure 12 and Figure 13 This illustrates an example of the control of control device 8. Figure 12 and Figure 13 This is a diagram illustrating an example of the control flow for the action of at least one switching valve 5.

[0081] In the first step ST1, the control device 8 determines whether the operating switch 6 has been operated by a first operation or a second operation. If the control device 8 receives a first operation detection signal from the operating switch 6, it determines that the operating switch 6 has been operated by a first operation, and energizes the first solenoid 51 (second step ST2). If the control device 8 receives a second operation detection signal from the operating switch 6, it determines that the operating switch 6 has been operated by a second operation, and energizes the second solenoid 52 (eighth step ST8).

[0082] The first step ST1 can also be executed only when door 2 is unlocked. In other words, the execution of the first step ST1 can also be prohibited when door 2 is locked.

[0083] In the second step ST2, the first solenoid 51 is energized, thereby switching the state of at least one switching valve 5 from the first state to the second state. As a result, at least one cylinder 4 applies a first auxiliary force to the door 2 in the first direction DR1.

[0084] In the third step ST3, the control device 8 determines whether the duration of the first operation is below a first threshold. In other words, the control device 8 determines whether the duration of the first operation detection signal reception is below the first threshold. If the duration of the first operation is below the first threshold, proceed to the sixth step ST6. On the other hand, if the control device 8 continuously receives the first operation detection signal for a period exceeding the first threshold, it de-energizes the first solenoid 51 (fourth step ST4). By de-energizing the first solenoid 51, the state of at least one switching valve 5 returns from the second state to the first state. The control device 8 may also issue an alarm if it continuously receives the first operation detection signal for a period exceeding the first threshold (fifth step ST5).

[0085] In the sixth step ST6, the control device 8 determines whether the first operation has ended. In other words, the control device 8 determines whether the reception of the first operation detection signal has been interrupted. If the first operation has not ended, it returns to the third step ST3. On the other hand, if the first operation has ended, the control device 8 de-energizes the first solenoid 51 (seventh step ST7), ending the application of the first auxiliary force. Subsequently, the control device 8 may also execute the first step ST1 again.

[0086] In the eighth step ST8, the second solenoid 52 is energized, thereby switching the state of at least one switching valve 5 from the first state to the third state. As a result, at least one cylinder 4 applies a second auxiliary force to the valve 2 in the second direction DR2.

[0087] In the ninth step ST9, the control device 8 determines whether the duration of the second operation is below a second threshold. In other words, the control device 8 determines whether the duration of the second operation detection signal reception is below a second threshold. If the duration of the second operation is below the second threshold, the process proceeds to the twelfth step ST12. On the other hand, if the control device 8 continuously receives the second operation detection signal for a period exceeding the second threshold, it de-energizes the second solenoid 52 (tenth step ST10). By de-energizing the second solenoid 52, the state of at least one switching valve 5 returns from the third state to the first state. The control device 8 may also issue an alarm if it continuously receives the second operation detection signal for a period exceeding the second threshold (eleventh step ST11).

[0088] In step 12 (ST12), the control device 8 determines whether the second operation has ended. In other words, the control device 8 determines whether the reception of the second operation detection signal has been interrupted. If the second operation has not ended, it returns to step 9 (ST9). On the other hand, if the second operation has ended, the control device 8 de-energizes the second solenoid 52 (step 13 (ST13)) and ends the application of the second auxiliary force. Subsequently, the control device 8 may also execute step 1 (ST1) again.

[0089] (Apply braking force to DR2 in the second direction) The control device 8, upon receiving a first operation signal from the operation switch 6, switches the state of at least one switching valve 5 from a first state to a second state. As a result, at least one cylinder 4 applies a first auxiliary force to the door 2 in the first direction DR1. Subsequently, the control device 8 may also switch the state of at least one switching valve 5 by applying a braking force to the door 2 in the second direction DR2, corresponding to the end of receiving the first operation signal. More specifically, the control device 8 may also switch the state of the switching valve 5 from the aforementioned second state to a third state, corresponding to the end of receiving the first operation signal. By applying a braking force to the door 2 in the second direction DR2, the distance the door 2 moves in the first direction DR1 due to inertia is shortened. Furthermore, after a predetermined first setting period has elapsed since the state of the switching valve 5 switched from the second state to the third state, the control device 8 may also return the state of the switching valve 5 from the third state to the first state.

[0090] For example in Figure 12 In the described example, after the first solenoid 51 is de-energized (in other words, after the seventh step ST7 is executed), braking force is applied to the second direction DR2. More specifically, after the first solenoid 51 is de-energized, the control device 8 energizes the second solenoid 52 only for a pre-set first period. As a result, air is supplied from the air supply source 91 to the second air chamber 43A, and braking force is applied to the door 2 in the second direction DR2. After the first period has elapsed, the control device 8 de-energizes the second solenoid 52.

[0091] (Apply braking force to DR1 in the first direction) The control device 8, in response to receiving a second operation signal from the operation switch 6, switches the state of at least one switching valve 5 from a first state to a third state. As a result, at least one cylinder 4 applies a second auxiliary force to the door 2 in the second direction DR2. Subsequently, the control device 8 may also switch the state of at least one switching valve 5 by applying a braking force to the door 2 in the first direction DR1 in response to the end of receiving the second operation signal. More specifically, the control device 8 may also switch the state of the switching valve 5 from the aforementioned third state to the second state in response to the end of receiving the second operation signal. By applying a braking force to the door 2 in the first direction DR1, the distance the door 2 moves in the second direction DR2 due to inertia is shortened. In addition, after a preset second setting period has elapsed since the state of the switching valve 5 switched from the aforementioned third state to the second state, the control device 8 may also return the state of the switching valve 5 from the second state to the first state.

[0092] For example in Figure 13 In the described example, after the second solenoid 52 is de-energized (in other words, after step thirteen ST13 is executed), braking force is applied to the first direction DR1. More specifically, after the second solenoid 52 is de-energized, the control device 8 energizes the first solenoid 51 only for a pre-set second setting period. As a result, air is supplied from the air supply source 91 to the first air chamber 41A, and braking force is applied to the door 2 in the first direction DR1. After the second setting period has elapsed, the control device 8 de-energizes the first solenoid 51. Furthermore, the second setting period is, for example, the same length as the first setting period.

[0093] (Second Implementation) Reference Figures 14 to 17 This describes the door device 1B for the machine tool in the second embodiment. Figures 14 to 16 This is a schematic diagram illustrating the door device 1B for a machine tool in the second embodiment. Figure 17 This is a schematic diagram illustrating an example of the configuration of the movable pulley 76 and / or the first cylinder 4A.

[0094] The door device 1B for the machine tool in the second embodiment differs from the door device 1A for the machine tool in the first embodiment in that it includes a movable pulley 76. Otherwise, the door device 1B for the machine tool in the second embodiment is the same as the door device 1A for the machine tool in the first embodiment.

[0095] In the second embodiment, the description focuses on the differences from the first embodiment. Furthermore, in the second embodiment, repetitions of matters already described in the first embodiment are omitted. Therefore, in the second embodiment, matters already described in the first embodiment can be applied even if not explicitly stated.

[0096] like Figure 14 As illustrated, the door device 1B for the machine tool in the second embodiment includes: (1) a door 2 that can slide between a first position Q1 with the opening OP of the housing 110 closed and a second position Q2 with the opening OP open, the housing 110 defining the internal area of ​​the machine tool; (2) a handle 3 disposed on the door 2; (3) at least one cylinder 4 having a first air chamber 41A, which, by supplying air to the first air chamber 41A, imparts a first auxiliary force to the door 2 in a first direction DR1 from the first position Q1 toward the second position Q2; (4) an air passage FP including a first passage FP1 connecting the first air chamber 41A to an air supply source 91; (5) at least one switching valve 5 disposed on the air passage FP; and (6) an operating switch 6 that switches the state of at least one switching valve 5 between a first state and a second state, in which the door 2 is allowed to move in the first direction DR1 or from the second position Q2 toward the first position Q1 without the first auxiliary force, and in the second state, the door 2 is imparted a first auxiliary force in the first direction DR1.

[0097] Therefore, the door device 1B for machine tools in the second embodiment has the same effect as the door device 1A for machine tools in the first embodiment.

[0098] Figure 14 In the described example, at least one cylinder 4 has a first piston 44A driven by air supplied to a first air chamber 41A. More specifically, at least one cylinder 4 includes a first cylinder 4A, which includes a first air chamber 41A, a second air chamber 43A, and a first piston 44A disposed between the first air chamber 41A and the second air chamber 43A. Figure 14 As illustrated, when at least one switching valve 5 is in the first state, the first air chamber 41A is fluidly connected to the first atmospheric opening E1, and the second air chamber 43A is fluidly connected to the second atmospheric opening E2. Furthermore, as... Figure 15 As illustrated, when at least one switching valve 5 is in the second state, the first air chamber 41A is fluidly connected to the air supply source 91, and the second air chamber 43A is fluidly connected to the second atmospheric opening E2.

[0099] Figure 15 In the described example, the door device 1B includes a movable pulley 76, which converts a first movement of the door 2 into a second movement of the first piston 44A, which is smaller than the first movement. The second movement is, for example, half of the first movement.

[0100] Figure 15In the described example, the door device 1B, by incorporating a movable pulley 76, allows for a reduction in the stroke of the first piston 44A compared to the stroke of the door 2. Therefore, the length of the first cylinder 4A can be reduced. Furthermore, with a shorter stroke of the first piston 44A, a smaller diameter first cylinder 4A can be used (in other words, a smaller diameter first piston 44A). A smaller diameter first piston 44A means a smaller area of ​​the first piston 44A in contact with the air in the air chambers (41A, 43A) (i.e., the pressure-bearing area of ​​the first piston 44A). A smaller pressure-bearing area of ​​the first piston 44A means a smaller variation in the auxiliary force applied to the door 2 in response to pressure changes within the air chambers. Therefore, by shortening the stroke of the first piston 44A, the pressure-bearing area of ​​the first piston 44A can be reduced, thus mitigating the required precision in pressure adjustment by the regulators (71, 72).

[0101] Next, refer to Figures 14 to 17 This explains any additional structures that can be used in the door device 1B for machine tools in the second embodiment.

[0102] (First movable pulley 76A) Figure 15 In the described example, the movable pulley 76 includes a first movable pulley 76A. The first movable pulley 76A is supported by a first rod 45A (more specifically, a first end 451A of the first rod 45A) so that it can rotate about a first rotation axis AX1. The second end of the first rod 45A is connected, for example, to a first piston 44A.

[0103] like Figure 15 As illustrated, consider the case where at least one switching valve 5 is in the second state. Figure 15 In the described example, the first air chamber 41A is fluidly connected to the air supply source 91. In this case, by supplying air to the first air chamber 41A, a first force F1 is applied to the first piston 44A, the first rod 45A, and the first movable pulley 76A in a first direction DR1.

[0104] Figure 15 In the described example, door device 1B includes a flexible member 77 guided by a first movable pulley 76A. Furthermore, door 2 is directly or indirectly connected to the flexible member 77. In this case, if a first force F1 is applied to the first movable pulley 76A in a first direction DR1, the flexible member 77 applies a first auxiliary force to door 2 equal to half the magnitude of the first force F1.

[0105] Imagine that, using the combined force of the first auxiliary force and the operator's operating force, door 2 moves a first amount of movement in the first direction DR1. In this case, the first movable pulley 76A, the first rod 45A, and the first piston 44A move a second amount of movement in the first direction DR1, which is half the size of the first amount of movement.

[0106] The flexible component 77 can be a linear component such as a metal wire or cable, or a strip component such as a belt. Figure 15 In the described example, the first end 77a of the flexible member 77 is connected to the main body 40A (in other words, the cylinder portion) of the first cylinder 4A. Alternatively, the first end 77a of the flexible member 77 may also be connected to the housing 110.

[0107] (Second movable pulley 76B) Figure 16 In the described example, the movable pulley 76 includes a second movable pulley 76B. The second movable pulley 76B is supported by a second rod 45C (more specifically, the first end 451C of the second rod 45C) so that it can rotate about a second axis of rotation AX2. The second end of the second rod 45C is connected, for example, to a first piston 44A.

[0108] like Figure 16 As illustrated, consider the case where at least one switching valve 5 is in the third state. Figure 16 In the described example, the second air chamber 43A is fluidly connected to the air supply source 91. In this case, by supplying air to the second air chamber 43A, a second force F2 is applied to the first piston 44A, the second rod 45C, and the second movable pulley 76B in a second direction DR2.

[0109] Figure 16 In the described example, door device 1B includes a flexible member 77 guided by a second movable pulley 76B. Furthermore, door 2 is directly or indirectly connected to the flexible member 77. In this case, if a second force F2 is applied to the second movable pulley 76B in a second direction DR2, the flexible member 77 applies a second auxiliary force to door 2 equal to half the magnitude of the second force F2.

[0110] Imagine a scenario where the door 2 moves a third distance in the second direction DR2 using the combined force of the second auxiliary force and the operator's operating force. In this case, the second movable pulley 76B, the second rod 45C, and the first piston 44A move a fourth distance in the second direction DR2 by half the size of the third distance.

[0111] Figure 16 In the described example, the second end 77b of the flexible member 77 is connected to the main body 40A of the first cylinder 4A. Alternatively, the second end 77b of the flexible member 77 may also be connected to the housing 110.

[0112] Alternatively, if a winding device is provided to wind up the remaining metal wire and release the insufficient metal wire, the second movable pulley 76B can be omitted. Or, the second movable pulley 76B can be replaced with a fixed pulley.

[0113] (Cylinder 4) At least one cylinder 4 includes a first cylinder 4A. Figure 16 In the example described, the door device 1B has one cylinder 4. Alternatively, the door device 1B may have two or more cylinders 4. In other words, as... Figure 11 As illustrated, at least one cylinder 4 may also include a first cylinder 4A and a second cylinder 4B.

[0114] Figure 16 In the described example, the first cylinder 4A is a double-rod cylinder. More specifically, the first cylinder 4A has a first rod 45A protruding from a first end of the main body 40A in a first direction DR1, and a second rod 45C protruding from a second end of the main body 40A in a second direction DR2. A first movable pulley 76A is disposed at the end of the first rod 45A, and a second movable pulley 76B is disposed at the end of the second rod 45C. Figure 16 In the described example, the flexible member 77 is guided by both a first movable pulley 76A disposed at the end of the first rod 45A and a second movable pulley 76B disposed at the end of the second rod 45C.

[0115] (Configuration of movable pulley 76) Figure 17 In the described example, the rotation axis of the movable pulley 76 is parallel to the vertical direction. More specifically, the first rotation axis AX1 of the first movable pulley 76A is parallel to the vertical direction, and the second rotation axis AX2 of the second movable pulley 76B is parallel to the vertical direction. In this case, the vertical dimension of the movable pulley 76 can be made compact, and furthermore, the vertical dimension of the mechanism that imparts auxiliary force can be made compact as a whole.

[0116] Figure 17 In the described example, the movable pulley 76 is disposed in the top portion 111 of the housing 110 within a defined internal area of ​​the machine tool (more specifically, the upper surface 111u of the top portion 111). In this case, by making the rotation axis of the movable pulley 76 parallel to the vertical direction, the overall height dimension of the machine tool can be made compact.

[0117] (Configuration of cylinder 4A) Figure 17In the described example, the first cylinder 4A is disposed in the top portion 111 of the housing 110 within a defined internal area of ​​the machine tool (more specifically, the upper surface 111u of the top portion 111). In this case, by adding the first cylinder 4A, it is not necessary to increase the size of the housing 110 when viewed from above. Furthermore, it is easy to add a mechanism (such as the first cylinder 4A) for providing auxiliary force to an existing machine tool. Figure 17 In the example described, the main body 40A (in other words, the cylinder part) of the first cylinder 4A is fixed to the roof part 111. Figure 17 The configuration of the first cylinder 4A in the first embodiment can also be adopted.

[0118] Figure 17 In the described example, the main body 40A of the first cylinder 4A is configured not to overlap with the movable pulley 76 when viewed from above. More specifically, the main body 40A of the first cylinder 4A and the movable pulley 76 (more specifically, the first movable pulley 76A and the second movable pulley 76B) are arranged along a horizontal plane. In this case, the overall height dimension of the mechanism that imparts auxiliary force can be made compact. Figure 17 In the recorded example, the first movable pulley 76A, the main body 40A of the first cylinder 4A, and the second movable pulley 76B are arranged on a straight line parallel to the horizontal plane.

[0119] (First connecting member 78) The door device 1B has a first connecting member 78 that connects the door 2 to the flexible member 77. Figure 17 In the described example, the first connecting member 78 is configured not to overlap with the first cylinder 4A when viewed from above. More specifically, the first cylinder 4A and the first connecting member 78 are arranged along a horizontal plane. In this case, the overall height dimension of the mechanism that imparts auxiliary force can be made compact. Figure 17 In the described example, when the direction from the back of the housing 110 toward the opening OP of the housing 110 is defined as the third direction DR3, the first connecting member 78 is disposed on the third direction DR3 side of the first cylinder 4A.

[0120] (Second connecting member 79) The door device 1B may also have at least one second connecting member 79 that connects the top portion 111 of the housing 110 to the flexible member 77. Figure 17 In the described example, the first cylinder 4A and at least one second connecting member 79 are arranged along a horizontal plane. Figure 17 In the recorded examples, there are two second connecting members 79, but there may also be one or more second connecting members 79. Furthermore, in cases where the flexible member 77 is a ring-shaped member, the second connecting member 79 may be omitted.

[0121] (Door 2) Figure 17 In the described example, there is one door 2. Alternatively, there may be two or more doors 2. For example, door 2 may include a first door that opens a portion of the opening OP by moving in a first direction DR1, and a second door that opens another portion of the opening OP by moving in a second direction DR2 opposite to the first direction DR1. In this case, mechanisms for applying auxiliary force may be provided for the first door and the second door respectively. Furthermore, door 2 may be a sliding door having a first panel and a second panel, the second panel being connected to the first panel in a manner that allows it to slide relative to the first panel. In this case, the first panel and the second panel may overlap when the opening OP is open, and the second panel may unfold relative to the first panel in a manner that reduces the overlap area between the first panel and the second panel when the opening OP is closed. In this case, a handle 3 may be provided on the second panel, and a mechanism for applying auxiliary force may also be provided on the second panel. In addition, in the first embodiment or the second embodiment, the number or type of door 2 is not limited to the examples described above, and can be arbitrarily set.

[0122] Figure 17 In the described example, the opening OP of the housing 110 includes a first opening OP1 formed in the front wall 112 of the housing 110, and a second opening OP2 formed in the roof portion 111 of the housing 110. Furthermore, Figure 17 In the example described, door 2 has a first plate portion 21 of a first opening OP1 that can close the front wall 112 of the housing 110, and a second plate portion 22 of a second opening OP2 that can close the roof portion 111 of the housing 110. Figure 17 In the described example, the door 2 has a generally L-shaped profile in a cross-section perpendicular to the first direction DR1. However, in either the first or second embodiment, the shape of the door 2 is not limited to the example described above and can be arbitrarily set.

[0123] (Supporting component 95) The door device 1B may also have a support member 95 that supports at least one cylinder 4, a movable pulley 76, and a first connecting member 78. In this case, by mounting the support member 95 to the ceiling portion 111, at least one cylinder 4, a movable pulley 76, and a first connecting member 78 can be arranged in the ceiling portion 111.

[0124] (Switching valve 5) In the second embodiment, the structure of at least one switching valve 5 can be the same as that of at least one switching valve 5 in the first embodiment. Figure 14In the example described, the door device 1B has one switching valve 5. Alternatively, the door device 1B may have two or more switching valves 5. For example, with... Figure 10 As in the recorded example, at least one switching valve 5 may also include a first switching valve 5A and a second switching valve 5B.

[0125] (Third Implementation) Reference Figures 1 to 18 This describes the machine tool 100 in the third embodiment. Figure 18 This is a simplified perspective view schematically representing the machine tool 100 in the third embodiment.

[0126] In the third embodiment, the description focuses on the differences from the first and second embodiments. Furthermore, in the third embodiment, repetitive descriptions of matters already described in the first or second embodiments are omitted. Therefore, in the third embodiment, even if not explicitly stated, matters already described in the first or second embodiments can naturally be applied.

[0127] The machine tool 100 in the third embodiment includes a processing device 120, a workpiece support device 130, a housing 110, and a door device 1.

[0128] The door device 1 can be the door device 1A in the first embodiment, the door device 1B in the second embodiment, or other door devices. The door device 1 includes: (1) a door 2 that can slide between a first position Q1 where the opening OP of the housing 110 is closed and a second position Q2 where the opening OP is open; (2) a handle 3 disposed on the door 2; (3) at least one cylinder 4 having a first air chamber 41A, which, by supplying air to the first air chamber 41A, imparts a first auxiliary force to the door 2 in a first direction DR1 from the first position Q1 toward the second position Q2; (4) an air passage FP including a first passage FP1 connecting the first air chamber 41A to an air supply source 91; (5) at least one switching valve 5 disposed on the air passage FP; and (6) an operating switch 6 that switches the state of at least one switching valve 5 between a first state and a second state, wherein in the first state the door 2 is allowed to move in the first direction DR1 or from the second position Q2 toward the first position Q1 in a second direction DR2 without the first auxiliary force, and in the second state the door 2 is imparted a first auxiliary force in the first direction DR1.

[0129] The machining apparatus 120 processes the workpiece. The machining apparatus 120 can hold the cutting tool used for processing the workpiece.

[0130] The workpiece support device 130 supports the workpiece processed by the processing device 120.

[0131] The housing 110 surrounds the processing device 120 and the workpiece support device 130. The housing 110 has an opening OP. Before processing by the processing device 120, the workpiece is inserted into the housing 110 through the opening OP. Furthermore, after processing by the processing device 120 is completed, the workpiece is removed through the opening OP.

[0132] This invention is not limited to the embodiments or modifications described above. It is obvious that the embodiments or modifications can be appropriately modified or altered within the scope of the inventive concept. Furthermore, as long as no technical contradiction arises, the various techniques employed in the embodiments or modifications can also be applied to other embodiments or modifications. Moreover, any additional structures in the embodiments or modifications can be appropriately omitted. Explanation of reference numerals in the attached figures

[0133] 1. Door device 1A, 1B; 2. Door; 3. Handle; 3h. Hole; 4. Cylinder; 4A. First cylinder; 4B. Second cylinder; 5. Switching valve; 5A. First switching valve; 5B. Second switching valve; 6. Operating switch; 8. Control device; 21. First plate; 22. Second plate; 25. Main surface; 31. Outer surface; 31f. Third direction side surface; 31u. Fourth direction side surface; 40A. Main body; 41A. First air chamber; 41B. Third air chamber; 43A. Second air chamber; 43B. Fourth air chamber; 44A. First piston; 44B. Second piston; 45A. First rod; 45B. Second rod; 45C. Second rod; 51. First solenoid; 52. Second solenoid; 60. Operating part; 61. First operating part; 62. Second operating part; 64. Operating part support member; 66a. First sensor; 66b. Second sensor; 71. First regulator; 7 2 Second regulator, 76 movable pulley, 76A first movable pulley, 76B second movable pulley, 77 flexible component, 77a first end, 77b second end, 78 first connecting component, 79 second connecting component, 91 air supply source, 95 support component, 100 machine tool, 110 housing, 111 top section, 111u upper surface, 112 front wall, 120 processing device, 130 workpiece support device, 451A first end, 451C first end, E1 first atmospheric opening, E2 second atmospheric opening, E3 third atmospheric opening, E4 fourth atmospheric opening, FP air flow channel, FP1 first flow channel, FP2 second flow channel, FP3 third flow channel, FP4 fourth flow channel, FP5 fifth flow channel, FP6 sixth flow channel, OP opening, OP1 first opening, OP2 second opening.

Claims

1. A door device for a machine tool, comprising: The door is slidable between a first position where the opening of the housing is closed and a second position where the opening is open, the housing defining the internal area of ​​the machine tool; A handle is provided on the door; At least one cylinder having a first air chamber, by supplying air to the first air chamber, thereby imparting a first auxiliary force to the door in a first direction from the first position toward the second position; An airflow channel, comprising a first flow channel connecting the first air chamber to an air supply source; At least one switching valve is configured in the airflow channel; as well as The operator switches the state of at least one of the switching valves between a first state and a second state. In the first state, the door is allowed to move in the first direction or from the second position toward the first position in a second direction without the first auxiliary force. In the second state, the first auxiliary force is applied to the door in the first direction. The operating switch can be operated independently of the handle, and the default state of the at least one switching valve is the first state. By selecting the first state, the door can be opened in the same way as a normal door without any assistance functions.

2. The door device for machine tools according to claim 1, wherein, At least one of the switching valves, in the first state, fluidly connects a first atmospheric opening that opens the interior air of the first air chamber to the first air chamber. At least one of the switching valves fluidly connects the air supply source to the first air chamber in the second state.

3. The door device for a machine tool according to claim 1 or 2, wherein, The magnitude of the first auxiliary force is smaller than the force required to slide the door.

4. The door device for a machine tool according to claim 1 or 2, wherein, It can perform all or part of the operation of the operating switch independently of the operation of the handle.

5. The door device for a machine tool according to claim 1 or 2, wherein, The operating switch is configured on the handle in such a way that it can be operated simultaneously by holding the handle with the hand and by operating the operating switch with the fingers of the hand.

6. The door device for a machine tool according to claim 1 or 2, wherein, At least one of the cylinders has a second air chamber. At least one of the cylinders can apply a second auxiliary force to the door in the second direction by supplying air to the second air chamber. The airflow channel includes a second channel connecting the second air chamber to the air supply source. The operating switch can switch between a first state in which the door is allowed to move in the first or second direction without the first and second auxiliary forces, and a third state in which the second auxiliary force is applied to the door in the second direction, at least one of the switching valves.

7. The door device for a machine tool according to claim 2, wherein, At least one of the cylinders has a second air chamber. At least one of the cylinders can apply a second auxiliary force to the door in the second direction by supplying air to the second air chamber. The airflow channel includes a second channel connecting the second air chamber to the air supply source. The operating switch can switch between a first state, in which the door is allowed to move in the first direction or the second direction without the first and second auxiliary forces, and a third state, in which the second auxiliary force is applied to the door in the second direction, at least one of the switching valves. At least one of the switching valves, in the first state, fluidly connects the first atmospheric opening to the first air chamber and fluidly connects the second atmospheric opening, which opens the interior air of the second air chamber, to the second air chamber. At least one of the switching valves fluidly connects the first atmospheric opening to the first air chamber and fluidly connects the air supply source to the second air chamber in the third state.

8. The door device for a machine tool according to claim 6, wherein, The magnitude of the second auxiliary force is smaller than the force required to slide the door.

9. The door device for a machine tool according to claim 6, wherein, The operating switch includes: A first operating unit switches the state of at least one of the switching valves from the first state to the second state; and The second operating unit switches the state of at least one of the switching valves from the first state to the third state. The first operating unit is configured to be located further toward the first direction side than the second operating unit.

10. The door device for a machine tool according to claim 6, further comprising: The first regulator adjusts the pressure of the air supplied to the first air chamber to a first set pressure; as well as The second regulator adjusts the pressure of the air supplied to the second air chamber to a second set pressure.

11. The door device for a machine tool according to claim 1 or 2, wherein, It also includes a control device that receives a first operation detection signal indicating that the operation switch has been operated in a first manner. The control device, upon receiving the first operation detection signal, switches the state of at least one of the switching valves from the first state to the second state. If the control device continuously receives the first operation detection signal for a period exceeding the first threshold, it causes the state of at least one of the switching valves to return from the second state to the first state.

12. The door device for a machine tool according to claim 1 or 2, wherein, It also includes a control device that receives a first operation detection signal indicating that the operation switch has been operated in a first manner. The control device, upon receiving the first operation detection signal, switches the state of at least one of the switching valves from the first state to the second state. The control device corresponds to the termination of receiving the first operation detection signal, switching the state of at least one of the switching valves, and applying braking force to the door in the second direction with at least one of the cylinders.

13. The door device for a machine tool according to claim 1 or 2, wherein, It also includes movable pulleys, At least one of the cylinders has a first piston driven by air supplied to the first air chamber. The movable pulley converts the first movement of the door into a second movement of the first piston, which is smaller than the first movement.

14. The door device for a machine tool according to claim 13, wherein, The axis of rotation of the movable pulley is parallel to the vertical direction.

15. A machine tool, comprising: Processing equipment for processing workpieces; Workpiece support device, for supporting the workpiece; The housing surrounds the processing device and the workpiece support device, and has an opening; as well as Door assembly, The door device includes: The door can slide between a first position where the opening is closed and a second position where the opening is open; A handle is provided on the door; At least one cylinder having a first air chamber, by supplying air to the first air chamber, thereby imparting a first auxiliary force to the door in a first direction from the first position toward the second position; An airflow channel, comprising a first flow channel connecting the first air chamber to an air supply source; At least one switching valve is configured in the airflow channel; and The operator switches the state of at least one of the switching valves between a first state and a second state. In the first state, the door is allowed to move in the first direction or from the second position toward the first position in a second direction without the first auxiliary force. In the second state, the first auxiliary force is applied to the door in the first direction. The operating switch can be operated independently of the handle, and the default state of the at least one switching valve is the first state. By selecting the first state, the door can be opened in the same way as a normal door without any assistance functions.

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