JP4779322B2 - Door opening / closing mechanism, operation box having the door opening / closing mechanism, and machine tool having the operation box - Google Patents

Description

  The present invention relates to a door opening / closing mechanism, an operation box including the door opening / closing mechanism, and a machine tool including the operation box, and more particularly, to a door capable of closely fixing a door to a panel opening without any gap. The present invention relates to an opening / closing mechanism, an operation box including the door opening / closing mechanism, and a machine tool including the operation box.

  Conventionally, a machining center, which is a machine tool, has a machine tool main body for machining a workpiece and a splash that surrounds the machine tool main body and prevents splashes and chips of coolant splashing from the machine tool main body from being scattered around the outside. It consists of a cover. A substantially rectangular parallelepiped operation box having an operation panel for operating the machining center on the front surface (user facing side) is provided on the front surface (user facing side) of the splash cover. The operation panel is pivotally supported by an opening provided on the front surface of the operation box so as to be opened and closed. Further, various circuit boards related to the control of the machining center itself are exposed and fixed on the back side of the operation panel, but the back side is directed to the inside of the operation box. Therefore, since the space between the back side of the operation panel and the inside of the splash cover is surely blocked by the wall surface of the operation box, coolant splashes and chips scattered from the machining area of the machine tool body are It does not adhere to various substrates. In addition, since the operation panel can be opened and closed, the maintenance panel can be opened to perform work when maintaining various substrates of the operation panel.

  Further, the operation panel can be fixed to the opening of the operation box by fixing the periphery thereof with a fixing screw. This is because in a factory where various machine tools such as a machining center are operating, coolant and various solvents are volatilized and float in a mist state, so that the mist-like substance is removed from the gap between the operation panel and the opening. This is to prevent intrusion and adhesion to the circuit board on the back side of the operation panel. Further, since a resin packing is disposed between the operation panel and the vicinity of the edge of the opening, the adhesion of the seal portion with the operation panel is improved.

In such an operation box, for example, when the tightening with the screws of the operation panel is not sufficient, or when the tightening with the screws is not uniform, the pressure applied to the packing becomes partially uneven. A gap is formed in the mist, and a mist-like substance enters through the gap. Therefore, for example, a machine tool has been proposed in which play is formed between a cover-side hinge (operation panel-side hinge) shaft and a cylindrical portion of the panel-side hinge that pivotally supports the shaft (for example, Patent Documents). 1). According to the machining center of this machine tool, when the operation panel is tightened with a plurality of screws against the opening of the splash cover, the tip of the screw abuts against the hinge on the panel side and presses the back side of the splash cover. The operation panel moves to the rear side of the splash cover within the range of play with the cylindrical portion of the panel side hinge.
JP-A-11-33854

  However, since the operation panel described in Patent Document 1 can move only within the range of play made between the cover-side hinge shaft and the panel-side hinge cylindrical portion, the operation panel is moved until the packing is completely crushed. I couldn't. Therefore, the gaps that can be made in the packing cannot be completely eliminated, and mist-like substances enter the splash cover from the gaps, adhere to each circuit board of the operation panel of the operation panel, and damage the operation panel. There was a problem. Therefore, in order to eliminate the gaps between these packings, it is possible to increase the play in the cylindrical part of the panel side hinge and increase the degree of crushing of the packing, but when the operation panel is opened, the cover side hinge Since the shaft is largely rattled by play in the cylindrical part of the panel side hinge, the operation panel is inclined obliquely by its own weight (so-called one-down state). Therefore, when the operation panel is closed, the lower end portion of the operation panel may collide with the vicinity of the lower edge of the opening, which causes problems such as difficulty in opening and closing the operation panel.

  The present invention has been made to solve the above-described problems, and includes a door opening / closing mechanism capable of improving the sealing performance of the door, an operation box including the door opening / closing mechanism, and a machine tool including the operation box. The purpose is to provide.

In order to achieve the above object, according to the door opening and closing mechanism according to claim 1, the opening provided on the front surface of the rectangular parallelepiped box is formed by the hinge provided in the vicinity of the opening. In the door opening / closing mechanism that opens and closes by a door pivotally supported around the rotation shaft, the hinge includes a door-side hinge provided on the door and a box-side hinge provided on the inner surface of the back surface of the box. A box-side hinge support means that is provided on the back surface of the box and supports the box-side hinge so as to be movable in a direction perpendicular to the rotation axis; and provided near the outer edge of the door. The door-side fixing hole, the box-side fixing hole provided near the edge of the opening and facing the door-side fixing hole, and screwed into the box-side fixing hole via the door-side fixing hole Between the fixing screw for fixing the door to the opening and the vicinity of the edge of the door and the opening. The rotating shaft is connected to the box-side hinge, and the fixing screw screwed into the box-side fixing hole when the door is fixed to the opening. When the tip abuts against the rotation shaft and presses toward the back surface of the box body, the box-side hinge moves toward the back surface of the box body, and the packing includes the door and It is crushed between the vicinity of the edge of the opening .

  According to the door opening / closing mechanism of claim 2, in addition to the configuration of the invention of claim 1, the box-side hinge support means always attaches the box-side hinge to the door-side hinge side. A biasing means for biasing is provided.

  Further, according to the door opening and closing mechanism according to claim 3, in addition to the configuration of the invention according to claim 1 or 2, the amount of movement of the box-side hinge that can move toward the back of the box is: It is larger than the crushing allowance of the packing.

According to a door opening / closing mechanism according to a fourth aspect , in addition to the configuration of the invention according to any one of the first to third aspects , the box-side hinge support means projects perpendicularly to the rotating shaft. A first pin extending toward the back of the box, a second pin facing the tip of the first pin and protruding from the back of the box, and the first pin interpolating the said pin second pin coaxially consists tubular coupling cylinder body and you coupled together, the biasing means is composed of a circular cylindrical spring, the spring, the first It is characterized by being mounted on the pin.

According to the door opening and closing mechanism according to claim 5 , in addition to the configuration of the invention according to any one of claims 1 to 4 , a plurality of the hinges are provided, and the rotation shafts of the plurality of hinges are: Each is connected on the same axis.

The operation box according to claim 6 is an operation box provided with an operation panel for operating the machine, and is provided at an opening on the front surface of the operation box, supports the operation panel, and can be opened and closed. And a door opening / closing mechanism according to any one of claims 1 to 5 .

The machine tool according to claim 7 is a machine tool for machining a workpiece, and includes the operation box according to claim 6 .

According to the door opening / closing mechanism of the first aspect, the box-side hinge can be moved perpendicularly to the rotation axis by the box-side hinge support means. Further, as the box-side hinge moves, the door-side hinge moves via the rotation shaft, so that the door can be moved perpendicular to the hinge rotation shaft. Accordingly, when the door is fixed to the front surface of the box, the entire door can be moved toward the back side of the box, so that the opening of the box can be closed without gaps by the entire door. The sealing performance can be improved. In addition, when the door is fixed to the opening, the tip of the fixing screw screwed into the box-side fixing hole comes into contact with the rotating shaft and presses toward the back of the box. Can be moved toward the back of the box. Further, as the box-side hinge moves, the door-side hinge moves toward the back of the box via the pivot shaft, so that the entire door can be moved toward the back of the box. Furthermore, since the whole door moves toward the back surface of the box, the packing can be reliably crushed between the door and the vicinity of the opening edge, and the sealing performance of the door can be improved.

According to the door opening / closing mechanism of claim 2, in addition to the effect of the invention of claim 1, the box-side hinge is constantly urged toward the door-side hinge by the urging means. Therefore, the box-side hinge support means can support the box-side hinge in a state of floating in a direction away from the box. Therefore, when the door is opened from the opening on the front side of the box body, the entire door is pivotally supported in a state of floating from the front side of the box body, and when closing, the entire door is directed toward the front side of the box body. By pressing, the entire door can be brought into close contact with the front surface of the box without any gap .

Moreover, according to the door opening and closing mechanism according to claim 3, in addition to the effect of the invention according to claim 1 or 2, the amount of movement of the box-side hinge that can move toward the back of the box is Since it is larger than the crushing allowance, the packing can be sufficiently crushed. Therefore, it is possible to prevent a gap from being formed between the packing, the door, and the vicinity of the opening.

According to the door opening / closing mechanism according to claim 4, in addition to the effect of the invention according to any one of claims 1 to 3, a spring wrapped around the first pin is provided at one end of the connecting cylinder. Since they are in contact with each other, the box-side hinge connected to the rotating shaft is supported in a state of floating in a direction away from the box. Therefore, a gap can be formed between the first pin and the second pin inside the connecting cylinder. The entire door can be moved within the gap amount. Further, since the movement of the box-side hinge can be guided by the connecting cylinder, the first pin, and the second pin, the entire door can be fixed without being displaced to the front surface of the box.

According to the door opening / closing mechanism of the fifth aspect , in addition to the effect of the invention according to any one of the first to fourth aspects , the plurality of hinges are connected coaxially via a single rotating shaft. Therefore, the positioning of the hinges can be facilitated. Further, since the plurality of hinges are connected to each other by a single rotation shaft, it is possible to prevent the relative positions of the hinges from being displaced. Furthermore, since only one rotating shaft is required, the cost of parts can be reduced.

Further, according to the operation box according to claim 6 , since the door opening / closing mechanism having a good sealing property between the vicinity of the edge of the opening and the door is provided, it is possible to prevent foreign matter from entering the operation box. . Therefore, for example, even if the back surface side of the operation panel is exposed inside the operation box, foreign matter does not adhere to the back surface side, and it is possible to prevent a failure of the operation panel.

Further, according to the machine tool according to claim 7 , since it has a door opening and closing mechanism having a good sealability between the vicinity of the edge of the opening and the door, chips and coolant splashes in the operation box, Intrusion of foreign substances such as volatile solvents can be prevented. Therefore, for example, even if the back surface side of the operation panel is exposed inside the operation box, these foreign substances do not adhere to the back surface side, and it is possible to prevent a failure of the operation panel.

  Hereinafter, a machining center 1 according to an embodiment of the present invention will be described with reference to the drawings. 1 is a front view of the machining center 1, FIG. 2 is a perspective view of the operation box 10, FIG. 3 is a front view of the operation panel 11, and FIG. 4 is a rear view of the operation panel 11. 5 is a perspective view seen from the back of the operation panel 11 showing a state in which the packing 30 is fixed, and FIG. 6 is a partially enlarged view showing the vicinity of the upper bearing portion 22 shown in FIG. The machining center 1 according to this embodiment includes a substantially box-shaped operation box 10, and an operation panel 11 provided in the vicinity of the opening 18 of the operation box 10 so as to be openable and closable via the packing 30. 10 can be fixed in close contact with the front surface. The machining center 1 shown in FIG. 1 corresponds to a “machine tool”.

  First, the schematic structure of the machining center 1 will be described. A machining center 1 shown in FIG. 1 includes a machine main body (not shown) that processes a workpiece, and a splash cover 2 that surrounds and protects the periphery of the machine main body. The machine body is provided at the rear of the machining table and a machining table (not shown) that holds the workpiece detachably and is movable in the X-axis direction (left-right direction) and the Y-axis direction (depth direction). A column (not shown), a spindle head (not shown) provided on the column and supported so as to be movable in the Z-axis direction (up and down direction), and connected to the spindle head and mounted with a machining tool A rotation spindle (not shown) that rotates at high speed and an automatic tool changer (not shown) that exchanges a tool attached to the tip of the rotation spindle with another tool are mainly configured. In the machining center 1 having such a configuration, the rotating spindle with the tool mounted on the tip rotates at a high speed, thereby “milling”, “drilling” and “ Various operations such as boring can be performed.

  Next, the splash cover 2 will be described. As shown in FIG. 1, the splash cover 2 prevents contamination of the outside by scattering of chips, splashes of coolant (cutting fluid), etc. from a processing table or a tool of the machine body. It is a substantially rectangular parallelepiped metal cover. A front opening of the splash cover 2 is provided with a cover opening (not shown) for taking in and out the work placed on the processing table of the machine body. Further, the cover opening is provided with a pair of left and right doors 4 and 4 slidably opened and closed on both the left and right sides, and the window 3a, 4a is provided. Further, a vertically long, substantially rectangular box opening (not shown) is opened on the right side of the right opening / closing door 4 of the splash cover 2, and an operation box 10 for operating the machining center 1 is opened in the box opening. Is inserted.

  Next, the operation box 10 that is a feature of the present invention will be described. As shown in FIG. 2, the operation box 10 is a substantially rectangular parallelepiped metal (for example, iron) box-type cover. The operation box 10 includes a box main body 12 having an opening 18 (see FIG. 7) on the front surface, and an operation panel 11 that is pivotally supported in the vicinity of the opening 18 of the box main body 12 so as to be opened and closed and operates the machining center 1. Consists of the subject. The operation panel 11 is normally covered by the opening 18 and the vicinity of the outer peripheral edge thereof is fixed by a plurality of fixing screws 16. A spare opening 14 (see FIG. 7) is provided below the operation panel 11, and a spare switch panel 13 is covered by the spare opening 14 and fixed by a fixing screw 16. The operation box 10 shown in FIG. 2 corresponds to a “box”.

  Next, the operation panel 11 will be described. As shown in FIGS. 2 and 3, the operation panel 11 is a substantially rectangular panel that is vertically long in a plan view. On the front side of the operation panel 11, a liquid crystal display 17 for monitoring the setting screen and the operating status of the machining center 1 (see FIG. 1) is provided in the upper half. Further, on the lower left side of the display 17 is provided a first setting unit 19a including a numeric keypad (not shown) for inputting a set value of the operating condition of the machining center 1, and on the right side, a display of the display 17 is provided. A second setting unit 19b including various operation keys for switching screens and the like is provided.

  Various switches and buttons such as a start switch for starting the machining center 1 and an operation switch for instructing a tool change operation by the automatic tool changer are provided below the first setting unit 19a and the second setting unit 19b. An operation unit 20 is provided. Then, each switch in the operation unit 20 is turned on and off to control each device constituting the machining center 1 (see FIG. 1) from the circuit boards 28 and 29 (see FIG. 4) provided on the back side of the operation panel 11. Each signal is output, the machining table is moved based on these control signals, tool change by an automatic tool changer is performed, and various operations are executed.

  Further, as shown in FIG. 3, in the vicinity of the outer edge of the operation panel 11, a panel side fixing hole 15 as a door side fixing hole for fixing the operation panel 11 to the front side of the box body 12 (see FIG. 7) is spaced. Are arranged in a row. The plurality of panel-side fixing holes 15 are respectively opposed to box-side fixing holes 35 as box-side fixing holes arranged in contact end portions 40 of the opening 18 of the box body 12 (see FIG. 7). is doing.

  On the other hand, as shown in FIG. 4, in the substantially middle stage on the back surface of the operation panel 11, based on the display substrate that displays the setting screen on the display 17 and the input signals in the first setting unit 19 a and the second setting unit 19 b, Circuit boards 28 and 29 made up of a control board for controlling the operation of the machining center 1 are exposed and assembled.

  Further, as shown in FIGS. 4 and 5, one end portion of the operation panel 11 on the side where the operation panel 11 is pivotally supported is defined as a pivotal support side end portion 6, and the other end portion opposite to the pivotal support side end portion 6 is opened and closed When the end portion 7 is provided, an upper bearing portion 22 having a substantially U-shaped cross section is provided slightly above the middle position in the longitudinal direction of the shaft support side end portion 6 of the operation panel 11. A lower bearing portion 24 having a substantially U-shaped cross section is provided at the lower position. And these upper side bearing part 22 and lower side bearing part 24 are pivotally supported by the shaft part unit 50 (refer FIG. 9) mentioned later.

  Here, the upper bearing portion 22 and the lower bearing portion 24 will be described. As shown in FIG. 6, the upper bearing portion 22 includes a substantially belt-shaped first bearing piece 22 a fixed along the back surface of the shaft support side end portion 6 of the operation panel 11, and the longitudinal direction of the first bearing piece 22 a. A second bearing piece 22b which is erected substantially perpendicularly to the back surface of the operation panel 11 from one end perpendicular to the inner surface of the operation panel 11 and folded inward toward the outside. The second bearing piece 22b is fixed along the outer surface of the folded portion on the distal end side, and is provided at the substantially L-shaped third bearing piece 22c and the distal end portion of the third bearing piece 22c in the vertical direction. The cylindrical portion 22d has a substantially cylindrical shape to which the shaft hole 23 is directed. On the other hand, as shown in FIG. 5, the lower bearing portion 24 also has a structure similar to that of the upper bearing portion 22, and includes a substantially cylindrical cylindrical portion 24 d in which the shaft hole 25 is directed in the vertical direction. An upper shaft pin 56 and a lower shaft pin 57 of a shaft unit 50 (see FIG. 9), which will be described later, are fitted into the shaft hole 23 of the cylindrical portion 22d and the shaft hole 25 of the cylindrical portion 24d, respectively. The part 22 and the lower bearing part 24 are each supported. Note that the upper bearing portion 22 and the lower bearing portion 24 shown in FIG. 5 correspond to a “door hinge”.

  As shown in FIG. 5, a substantially rectangular packing 30 having a predetermined thickness (for example, 5 mm) in plan view is fixed in the vicinity of the outer edge on the back surface side of the operation panel 11 having the above configuration. Further, a packing-side hole 31 through which the fixing screw 16 (see FIG. 2) passes is provided in a portion of the packing 30 that faces the panel-side fixing hole 15 of the operation panel 11. The packing 30 is a resin packing, and when the operation panel 11 is fixed to the opening 18 (see FIG. 2), there is a gap between the operation panel 11 and the vicinity of the edge of the opening 18 of the box body 12. It will be closely attached.

  Next, the box body 12 will be described. FIG. 7 is a front view of the box body 12, and FIG. 8 is a perspective view of the box body 12 as viewed from the front side. As shown in FIG. 7, the box body 12 is a substantially rectangular parallelepiped box whose front surface is opened. A vertically long, substantially rectangular opening 18 is provided in a portion of the front surface except for the lower side. Further, a horizontally long and substantially rectangular preliminary opening 14 is provided on the lower side. Further, an outer peripheral edge surrounding the opening 18 and the auxiliary opening 14 on the front surface of the box main body 12 is extended in parallel to the box rear surface 8 toward the inside of the box main body 12, and the operation panel 11 and the auxiliary switch panel 13. A contact end portion 40 having a substantially band shape in plan view that abuts on the back side of each of the two frames is provided, and two substantially rectangular frames in a plan view are combined vertically. A plurality of box-side fixing holes 35 are arranged in the abutting end portion 40 substantially along the center in the width direction. Further, the box-side fixing hole 35 faces the panel-side fixing hole 15 of the operation panel 11 and the panel-side fixing hole (not shown) provided in the vicinity of the outer peripheral edge of the auxiliary switch panel 13.

  Further, as shown in FIG. 8, on the back side 8 of the box inside the box body 12, the box body 12 is slightly above the middle position in the longitudinal direction of the corner on the left side (left side in FIG. 8). An upper support pin 41 protruding from the bottom surface toward the front surface is provided. Further, a lower support pin 42 that protrudes from the bottom surface of the box body 12 toward the front surface is provided at a substantially lower position in the longitudinal direction near the corner. The upper support pins 41 and the lower support pins 42 support the operation panel 11 via a shaft unit 50 (see FIG. 9) described later. Note that the upper support pin 41 and the lower support pin 42 shown in FIG. 8 correspond to a “second pin”.

  Next, the spare switch panel 13 will be described. As shown in FIG. 8, the spare switch panel 13 is fixed so as to close the spare opening 14 provided on the front surface of the box body 12. The spare switch panel 13 is provided with ten spare holes 9 (5 in each stage) penetrating through two upper and lower stages. Then, as shown in FIG. 2, panel plugs 45 are respectively fitted in the preliminary holes 9 and closed. These spare holes 9 are for assembling various switches that are optionally assembled according to the desire of the user. Here, as an example of various switches set as options, there are a switch for automatically opening and closing a door, a switch for clamping or unclamping a workpiece, and the like. When a new switch set as an option is assembled in the spare hole 9, the panel stopper 45 (see FIG. 2) fitted in the spare hole 9 is removed and the switch is assembled.

  In addition, although the number of the spare holes 9 provided in the spare switch panel 13 in this embodiment is ten, it is not restricted to ten and may be more or less than this. A panel-side fixing hole (not shown) is formed in the vicinity of the outer peripheral edge of the spare switch panel 13. Then, the spare switch panel 13 is provided with the spare opening 14 by screwing the fixing screw 16 into each panel-side fixing hole in a state where the spare switch panel 13 is put on the spare opening 14 shown in FIG. The box body 12 is fixed at the lower position on the front surface.

  Next, the shaft unit 50 will be described. FIG. 9 is a perspective view of the shaft unit 50. As shown in FIG. 9, the shaft unit 50 is a shaft member having a longitudinal length in the vertical direction. The shaft unit 50 is a unit composed of a first shaft portion 51 connected to the operation panel 11 side shown in FIG. 3 and a second shaft portion 52 connected to the box body 12 side shown in FIG. is there.

  First, the first shaft portion 51 includes a substantially band-shaped shaft base portion 53 extending in the vertical direction, a substantially rectangular parallelepiped upper shaft support portion 54 provided at the upper end in the longitudinal direction of the shaft base portion 53, and A substantially rectangular parallelepiped lower shaft support portion 55 provided at the lower end of the shaft base 53 in the longitudinal direction, and an upper shaft extending substantially upward from the upper surface of the upper shaft support portion 54 onto the extension line of the shaft base portion 53 The pin 56 includes a lower shaft pin 57 extending from the upper surface of the lower shaft support portion 55 substantially upward in parallel with the longitudinal direction of the shaft base portion 53. The shaft base 53 shown in FIG. 9 corresponds to a “rotating shaft”.

  On the other hand, the second shaft portion 52 extends in parallel with the longitudinal direction of the shaft base portion 53, and has a substantially L-shaped cross section that is fixed to a substantially middle portion excluding the upper side and the lower side of the shaft base portion 53 in the longitudinal direction. An upper guide pin provided in the vicinity of the upper end and the lower end in the longitudinal direction of the L-shaped piece 58 and protruding substantially perpendicularly to the shaft base 53 via the L-shaped piece 58. 59 and a lower guide pin 60. The upper guide pin 59 and the lower guide pin 60 are respectively provided with substantially cylindrical springs 61 and 61 wound spirally. The upper shaft pin 56, the lower shaft pin 57, the upper shaft support portion 54, and the lower shaft support portion 55 shown in FIG. 9 correspond to the “box-side hinge”. Further, the upper guide pin 59 and the lower guide pin 60 shown in FIG. 9 correspond to the “first pin”.

  Next, a structure for assembling the operation panel 11 having the above configuration to the box body 12 will be described. 10 is an exploded perspective view of the operation box 10, FIG. 11 is a perspective view of the operation box 10 showing a state in which the operation panel 11 is assembled to the box body 12, and FIG. 2 is a perspective view of an operation box 10 showing a state of being fixed to a main body 12. FIG.

  As shown in FIG. 10, first, the upper shaft pin 56 and the lower shaft pin 57 of the shaft unit 50 with respect to the upper bearing portion 22 and the lower bearing portion 24 provided at the shaft support side end portion 6 of the operation panel 11. Are connected. At this time, the upper shaft pin 56 of the shaft unit 50 is fitted into the shaft hole 23 of the upper bearing portion 22 from below. On the other hand, the lower shaft pin 57 of the shaft unit 50 is fitted into the shaft hole 25 of the lower bearing portion 24 from below. Then, with respect to the shaft unit 50, the shaft support side end 6 side of the operation panel 11 serves as a shaft and the opening / closing side end 7 side is opened.

  Next, the springs 61 and 61 are respectively attached to the upper guide pin 59 and the lower guide pin 60 of the shaft unit 50 connected to the operation panel 11. On the other hand, the connecting cylinders 70 are attached to the upper support pin 41 and the lower support pin 42 on the box body 12 side. Subsequently, the tip of the upper guide pin 59 and the tip of the lower guide pin 60 to which the springs 61 and 61 are attached are inserted into the connecting cylinders 70 and 70 fitted into the upper support pin 41 and the lower support pin 42, respectively. To do. Thus, as shown in FIG. 11, the operation panel 11 is supported on the box body 12 side via the shaft unit 50. The operation panel 11 is pivotally supported so as to be openable and closable with respect to the opening 18 of the box body 12, and can open and close the opening 18.

As shown in FIG. 10, the springs 61, 61 are sandwiched between the L-shaped piece 58 of the shaft unit 50 and one end portion in the axial direction of the connecting cylinder 70. The springs 61 and 61 constantly urge the shaft unit 50 in a direction away from the box back surface 8 side of the box body 12. Therefore, in the connecting cylinders 70, a predetermined gap amount is provided between the tip of the upper guide pin 59 and the tip of the upper support pin 41 and between the tip of the lower guide pin 60 and the tip of the lower support pin 42. It is formed. And the gap | interval amount (distance) between each front-end | tip in this clearance gap is set longer than the thickness (crushing allowance) of the packing 30. FIG. The gap amount in the connecting cylinder 70 will be described in detail later. The upper support pin 41 and the lower support pin 42 shown in FIG. 8, the upper guide pin 59 and the lower guide pin 60 shown in FIG. 9, and the connecting cylinder 70 shown in FIG. It corresponds to.

Next, a method for fixing the operation panel 11 to the front surface of the box body 12 will be described. FIG. 13 is an explanatory diagram showing a movement state (before movement) of the operation panel 11 that moves when the fixing screw 16 is screwed. FIG. 14 shows a movement state (while moving) of the operation panel 11 that moves when the fixing screw 16 is screwed. FIG. 15 is an explanatory diagram showing a movement state (movement completion) of the operation panel 11 that moves when the fixing screw 16 is screwed. 13 to 15, for convenience of explanation, the movement of each member in the vicinity of the lower guide pin 60 of the shaft unit 50 is illustrated, and the movement of each member in the vicinity of the upper guide pin 59 is illustrated in the lower guide pin 60. Since it is the same as that, a description thereof is omitted .

As shown in FIG. 12, first, the back side of the operation panel 11 is brought into contact with a contact end portion 40 (see FIGS. 7 and 8) provided on the outer peripheral edge of the opening 18 on the front surface of the box body 12. The opening 18 (see FIG. 11) is closed. At this time, the panel-side fixing holes 15 (see FIG. 5) provided in a plurality of rows near the outer edge of the operation panel 11, the packing-side holes 31 (see FIG. 5) of the packing 30, and the abutting end 40 of the box body 12. The box side fixing holes 35 (see FIG. 7) arranged in a row face each other vertically. Then , as shown in FIG. 13 , fixing screws 16 are screwed into the panel-side fixing holes 15 of the operation panel 11. Then, the tip of the fixing screw 16 passes through the panel side fixing hole 15, the packing side hole 31 of the packing 30, and the box side fixing hole 35 in order. Further, when the fixing screw 16 is screwed in , the tip of the fixing screw 16 comes into contact with the surface of the L-shaped piece 58 fixed to the shaft base 53 of the shaft unit 50 as shown in FIG.

Further, when the fixing screw 16 is screwed, the tip of the fixing screw 16 comes into contact with the L-shaped piece 58 of the shaft unit 50 and presses the shaft base 53 toward the box back surface 8 side of the box body 12. Then, since the shaft base 53 moves toward the box back surface 8 side, the entire shaft unit 50 moves. Further, the entire operation panel 11 connected to the upper shaft pin 56 and the lower shaft pin 57 of the shaft unit 50 via the upper bearing portion 22 and the lower bearing portion 24 (see FIG. 10) is Move towards. As the operation panel 11 moves, the packing 30 disposed between the back side of the operation panel 11 and the contact end portion 40 of the box body 12 is gradually crushed. Then, as shown in FIG. 15, the packing 30 is completely crushed by being screwed in until the seat surface of the screw head 16 a of the fixing screw 16 comes into contact with the surface of the operation panel 11. In this way, the packing 30 is crushed between the operation panel 11 and the contact end portion 40 in proportion to the amount of movement of the operation panel 11 toward the box back surface 8 side.

Further , as shown in FIGS. 14 and 15, the lower guide pin 60 (upper guide pin 59) of the shaft unit 50 is guided in the gap formed in the connecting cylindrical body 70. Can be prevented from shifting in the moving direction. Furthermore, since the entire operation panel 11 connected to the shaft unit 50 can be moved in the horizontal direction, the packing 30 can be pressed evenly. Since the packing 30 is not partially biased and pressed, it is possible to prevent the packing 30 from forming a gap. Therefore, it is possible to prevent chips and coolant from entering the box body 12 from between the operation panel 11 and the contact end portion 40.

Here, the movement amount of the operation panel 11 will be described. As shown in FIG. 13, in the connecting cylinder 70 when the fixing screw 16 is not fixed, the tip of the lower guide pin 60 (upper guide pin 59) and the tip of the lower support pin 42 (upper support pin 41) The amount of the gap formed between the two is adjusted longer than the crushing allowance of the packing 30. For this reason, the fixing screw 16 is screwed from the panel side fixing hole 15, and the tip thereof presses the shaft base portion 53 via the L-shaped piece 58, so that the operation panel 11 can move within the gap of the connecting cylinder 70. The amount can be larger than the collapse allowance of the packing 30. As a result, as shown in FIG. 15, the packing 30 can be completely crushed, so that the sealing performance between the packing 30, the operation panel 11, and the contact end portion 40 can be further improved.

Next, the space saving inside the operation box 10 will be described. As shown in FIG. 16 , when the operation panel 11 can be opened and closed (in a state where the fixing screw 16 is not fixed), the upper part of the shaft unit 50 inserted into the shaft hole 23 of the upper bearing portion 22. The shaft pin 56 moves toward the back side of the contact end portion 40 of the box body 12 by the bias of the spring 61. Therefore, the structure of the second bearing piece 22b constituting the upper bearing portion 22 of the operation panel 11 can be set as follows.

For example, as shown in FIG. 16 , when the substantially U-shaped second bearing piece 22 b is viewed from above, a portion that is erected from the back surface side of the operation panel 11 and is folded back first is first folded. A portion that extends from the first portion 72 and the first folded portion 72 and is further folded inside is referred to as a second folded portion 73. The distance from the first folded portion 72 to the second folded portion is “A”, and the distance from the second folded portion 73 to the shaft hole 23 is “B”. When the operation panel 11 is opened and closed, the rotation end of the operation panel 11 (the upper shaft pin 56 and the lower shaft pin 57) and the contact end portion where the operation panel 11 first comes into contact by the bias of the springs 61 and 61. Since the distance to 40 is shortened, both A and B can be set short. Therefore, the volume of the bearing portion 22 occupying the inside of the box main body 12 can be made as small as possible, so that space saving inside the operation box 10 can be achieved. Furthermore, since the thickness of the operation box 10 can be reduced, the volume of the operation box 10 occupying the inside of the splash cover 2 can be reduced.

As described above, according to the machining center 1 according to an embodiment of the present invention, the bearing portions 22 and 24 of the operation panel 11 are pivotally supported by the upper shaft pin 56 and the lower shaft pin 57 of the shaft unit 50. Has been. The upper guide pin 59 and the lower guide pin 60 projecting from the shaft base 53 of the shaft unit 50 are projecting from the box back surface 8 of the box body 12 via the connecting cylinders 70 and 70. 41 and a lower support pin 42. Then, when the fixing screw 16 is screwed into the fixing holes that are drilled and aligned in the contact end portions 40 of the operation panel 11, the packing 30, and the box body 12, the tip of the fixing screw 16 is connected to the shaft unit 50. It abuts against the surface of the L-shaped piece 58 fixed to the shaft base 53 and presses it toward the box back surface 8 side of the box body 12. Then, since the shaft base 53 moves toward the box back surface 8 side, the entire shaft unit 50 moves, and the entire operation panel 11 connected to the shaft unit 50 moves toward the box back surface 8 side. Therefore, the entire packing 30 can be crushed uniformly between the operation panel 11 and the contact end portion 40, and the sealing performance by the packing 30 can be improved.

Further, in the connecting cylinder 70, the amount of gap formed between the tip of the upper guide pin 59 (lower guide pin 60) and the tip of the upper support pin 41 (lower support pin 42) is the thickness of the packing 30 ( It is adjusted longer than the crushing allowance. As a result, the amount of movement that can be moved in the gap of the connecting cylinder 70 can be made larger than the crushing allowance of the packing 30. And since the packing 30 can be crushed reliably, the sealing performance between the packing 30, the operation panel 11, and the contact edge part 40 can be improved.

  The present invention is not limited to the above embodiments, and various modifications can be made.

  For example, although a substantially cylindrical spring 61 is provided as the biasing means, a leaf spring or the like is provided between the shaft base 53 of the shaft unit 50 and the box back surface 8 of the box body 12 instead of the spring 61. May be. Furthermore, not only a spring but hard sponge, urethane, a magnet, etc. may be used.

  Further, two guide pins of the upper guide pin 59 and the lower guide pin 60 project from the shaft base 53 of the shaft unit 50, but the number may be more than two. In order to stably support the operation panel 11, a plurality of operation panels 11 are preferable.

  Further, the upper shaft pin 56 and the lower shaft pin 57 of the shaft unit 50 are extended upward, but may be extended downward, and the upper bearing portion 22 and the lower bearing portion 24 The shaft holes 23 and 25 may be inserted from above.

  The shaft base portion 53 of the shaft unit 50 is a single member that connects the upper shaft support portion 54 and the lower shaft support portion 55 up and down, but may be cut up and down.

Further, like a shaft unit 500 which is a modification of the shaft unit 50 shown in FIG. 17 , an upper guide pin 590 protrudes from the upper shaft support portion 54 and a lower guide pin 600 is attached to the lower shaft support portion 55. By projecting, the positions of the upper shaft pin 56 and the upper guide pin 590 and the positions of the lower shaft pin 57 and the lower guide pin 600 may be substantially the same position.

  The door opening / closing mechanism of the present invention can be applied not only to an operation box of a machine tool but also to various boxes having doors having doors pivotally supported in the vicinity of the opening of the panel.

1 is a front view of a machining center 1. FIG. 3 is a perspective view of an operation box 10. FIG. 2 is a front view of an operation panel 11. FIG. 3 is a rear view of the operation panel 11. FIG. It is the perspective view seen from the back surface of the operation panel 11 which shows the state to which the packing 30 is fixed. FIG. 6 is a partially enlarged view showing the vicinity of an upper bearing portion 22 shown in FIG. 5. It is a front view of the box main body 12. It is the perspective view seen from the front side of the box main body 12. FIG. 4 is a perspective view of a shaft unit 50. FIG. 3 is an exploded perspective view of an operation box 10. FIG. FIG. 3 is a perspective view of the operation box 10 showing a state in which the operation panel 11 is assembled to the box body 12. FIG. 3 is a perspective view of the operation box 10 showing a state in which the operation panel 11 is fixed to the box body 12. It is explanatory drawing which shows the movement state (before movement) of the operation panel 11 which moves by the screwing of the fixing screw 16. FIG. It is explanatory drawing which shows the movement state (during movement) of the operation panel 11 which moves by screwing in of the fixing screw 16. It is explanatory drawing which shows the movement state (movement completion) of the operation panel 11 which moves by the screwing of the fixing screw 16. FIG. It is a top view of the operation box 10 which shows the state by which the operation panel 11 was open | released. FIG. 10 is a perspective view of a shaft unit 500 that is a modification of the shaft unit 50.

DESCRIPTION OF SYMBOLS 1 Machining center 8 Box back surface 10 Operation box 11 Operation panel 12 Box main body 15 Panel side fixing hole 16 Fixing screw 18 Opening part 22 Upper bearing part 24 Lower bearing part 30 Packing 35 Box side fixing hole 41 Upper support pin 42 Lower support pin 53 Shaft base 59 Upper guide pin 60 Lower guide pin 61 Spring 70 Connecting cylinder

Claims (7)

In the door opening and closing mechanism that opens and closes the opening provided on the front surface of the rectangular parallelepiped box by a door that is supported around the rotation axis of the hinge by a hinge provided in the vicinity of the opening.
The hinge is
A door-side hinge provided on the door;
A box-side hinge provided on the inner surface of the back of the box,
A box-side hinge support means provided on the back surface of the box, and supporting the box-side hinge so as to be movable in a direction perpendicular to the rotation axis ;
A door-side fixing hole provided near the outer edge of the door;
A box-side fixing hole provided near the edge of the opening, and facing the door-side fixing hole;
A fixing screw that is screwed into the box-side fixing hole through the door-side fixing hole, and fixes the door to the opening;
A packing provided between the door and the vicinity of the edge of the opening;
With
The pivot shaft is connected to the box-side hinge,
When the door is fixed to the opening,
The tip of the fixing screw screwed into the box-side fixing hole is in contact with the rotating shaft and is pressed toward the back of the box, so that the box-side hinge is Move towards the back,
The door opening and closing mechanism , wherein the packing is crushed between the door and the vicinity of the edge of the opening. 2. The door opening / closing mechanism according to claim 1, wherein the box-side hinge support means includes biasing means that constantly biases the box-side hinge toward the door-side hinge . The door opening / closing mechanism according to claim 1 or 2, wherein an amount of movement of the box-side hinge that can move toward the back surface of the box is larger than a crushing allowance of the packing . The box-side hinge support means is
  A first pin projecting perpendicularly to the rotation axis and extending toward the back of the box;
  A second pin facing the tip of the first pin and projecting from the back of the box;
  A cylindrical connecting cylinder that coaxially inserts the first pin and the second pin and connects them together;
  Consisting of
  The biasing means is composed of a cylindrical spring,
  The door opening / closing mechanism according to any one of claims 1 to 3, wherein the spring is provided around the first pin. A plurality of the hinges are provided,
The door opening / closing mechanism according to any one of claims 1 to 4, wherein the rotation shafts of the plurality of hinges are coaxially connected to each other . An operation box having an operation panel for operating the machine,
A door that is provided at an opening on the front surface of the operation box, supports the operation panel, and is pivotally supported so as to be openable and closable, and the door opening and closing mechanism according to any one of claims 1 to 5. Characteristic operation box. A machine tool for machining a workpiece,
A machine tool comprising the operation box according to claim 6 .

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