JP6044421B2 - Control box assembly method and control box - Google Patents

Description

  The present invention relates to a control box assembly method and a control box.

  The machine tool includes a control box. The control box of a machine tool disclosed in Patent Document 1 stores a control board and the like and can be attached to a column of the machine tool. The control board controls the operation of the machine tool. The control box has a rectangular parallelepiped shape. Conventionally, an operator has fixed a front wall, a right side wall, a left side wall, a back wall, an upper wall, and a bottom wall by welding. Welding requires skill and skill. Therefore, rivets are suitable for fixing each wall. Rivets are easier to work than welding.

JP 2007-75908 A

  When the control box described in Patent Document 1 is assembled, if the rivets are hit sequentially from the end of the wall in a state where the mutual positional relationship between the walls is not determined, the wall may be distorted. Therefore, in order to prevent distortion of the walls, it is desirable to temporarily fix each wall in a rectangular parallelepiped shape and then hit the rivets in an appropriate order, but it is difficult to maintain the shape with each wall temporarily fixed. Met. The method of connecting the walls one by one sequentially is time-consuming because it is necessary to change the attitude of the control box frequently during assembly and hit the rivets. Since the strength of the rivet fixing is weaker than that of welding, there is a possibility that the rigidity of the control box is lowered.

  An object of the present invention is to provide a control box assembling method and a control box that can be assembled simply and appropriately by rivet fastening.

A control box assembly method according to claim 1 of the present invention is a control box that stores a control board of a machine tool and can be attached to the machine tool, and includes a front wall, a right side wall, a left side wall, a back wall, an upper wall, And the control box assembly method in which the bottom wall is fixed in a rectangular parallelepiped shape, the right side wall and the left side wall are plate-like abutting from the outside against the left and right edges of the back wall at each rear end. the abutting piece respectively provided, the contact piece is provided with a first engagement portion engaged with the first engaged portion provided respectively at the top of the left and right edges of the back wall at the top, the bottom The wall has a rib extending upward and abutting against the inner surface of the back wall at the rear end, and the rib engages with a second engagement portion provided at each of the lower portions of the left and right edges of the back wall. the inner surface of the second the engaged portion provided respectively on the left and right end side, the right side wall and the left side wall so as to face each other, the contact piece of the right wall The back wall is disposed so that the outer surfaces of the left and right edge portions of the back wall are in contact with the inner surface of the contact piece of the left side wall, and the first engaged portion is further in contact with the first engagement portion. By engaging the engaging portion, the right side wall and the left side wall are temporarily fixed to the back wall, and the inner surface of the back wall is brought into contact with the outer surface of the rib of the bottom wall, and By temporarily engaging the lower portion of the back wall with respect to the rib by engaging the second engaged portion with the second engaged portion, and in the temporary fixing step, On the other hand, with the right side wall and the left side wall temporarily fixed, the abutting piece of the right side wall and the abutting piece of the left side wall are fastened with rivets to the left and right edges of the back wall, respectively. while, in a state in which relative to the ribs was temporarily fixed the lower part of the back wall, with the rivet, before the back wall Against both the right and left edge portions, said the of the right side wall signed the contact piece of the contact piece the left side wall, and a fastening step for further fastening the lower part of the ribs and the back wall Features . In the temporary fixing process, the operator can temporarily fix the right side wall and the left side wall with respect to the back wall. Therefore, the shape of the back wall, the right side wall, and the left side wall can be maintained while standing on the work table . At concluding step, the operator against the left and right edges of the rear wall, the contact piece of the contact piece and the left wall of the right side wall can be easily respectively fastened by rivets. Since the front wall, the back wall, the top wall, and the bottom wall may be fixed to the temporarily fixed back wall, right side wall, and left side wall, there is no need to change the posture of the control box during the assembly process. Therefore, the number of assembling methods can be reduced. Since the abutment pieces of the right side wall and the left side wall are brought into contact with the left and right edges of the back wall and rivets are fastened, the rigidity of the left and right sides of the back wall is improved, and the rigidity of the entire control box is also improved.
Further, in the temporary fixing step, the operator can further temporarily fix the back wall to the rib of the bottom wall. Therefore, the shape of the control box can be maintained with the back wall, the right side wall, and the left side wall standing on the bottom wall. In the fastening process, the operator can easily fasten the back wall to the rib of the bottom wall with rivets. Since the front wall, the back wall, the top wall, and the bottom wall are fixed to the temporarily fixed bottom wall, back wall, right side wall, and left side wall, the control box can be easily assembled.

In the control box assembly method according to the second aspect of the invention, in addition to the configuration of the invention according to the first aspect, the second engaged portion includes a notch provided in a concave shape at the upper end of the rib, A second claw portion extending downward from a lower edge portion of the notch portion, and the second engagement portion includes a second protrusion portion protruding forward from the inner surface of the back wall, and the second A second through hole provided in the projecting portion and penetrating in the up-down direction, and inserting the second claw portion from below into the second through hole in the temporary fixing step. Is engaged with the second engaged portion. Since the second claw portion is inserted into the second through hole, the second engagement portion reliably engages with the second engaged portion and is unlikely to come off. The notch of the rib avoids interference with the second protrusion. Therefore, the entire control box can be made smaller as compared with the case where the control box is not provided with a notch.

Method of assembling a control box of the invention according to claim 3, in addition to the configuration of the invention according to claim 1 or 2, wherein the first engaged portion, the lower the opening, the upper edge of the opening A first claw portion extending to the first projection portion, the first projection portion projecting forward from the inner surface of the contact piece, and the first projection portion extending vertically. With the first through hole
In the temporary fixing step, the first claw portion is inserted into the first through hole from above, and the upper edge portion of the opening portion is locked to the upper portion of the first projecting portion. The first engaging portion is engaged with the first engaged portion. Since the first claw portion is inserted into the first through hole, the first engagement portion is reliably engaged with the first engaged portion and is difficult to come off. Since the upper edge of the opening is locked to the top of the first protrusion, the back wall can be positioned in the vertical direction.

A control box according to claim 4 is a control box that stores a control board of a machine tool and can be attached to the machine tool, and has a rectangular parallelepiped shape of a front wall, a right side wall, a left side wall, a back wall, an upper wall, and a bottom wall. The right side wall and the left side wall are respectively provided with plate-like contact pieces that come into contact with the left and right edges of the back wall from the outside at the respective rear end portions. contact piece is provided with a first engagement portion engaged with the first engaged portion provided respectively at the top of the left and right edges of the back wall at the top, the bottom wall extends out and the back upward A rib that abuts the inner surface of the wall is provided at the rear end, and the rib has a second engaged portion that engages with a second engaging portion provided at a lower portion of the left and right edges of the back wall. provided respectively at opposite ends, the first engaged portion is an opening, and a first hook portion extending downwardly from the upper edge of the opening, the first engaging portion, said A first projecting portion projecting forward from the inner surface of the contact piece through the opening portion and engaging with an upper edge portion of the opening portion; and provided in the first projecting portion and penetrating in a vertical direction; A first through-hole into which the claw portion is inserted from above, and the second engaged portion includes a notch provided in a concave shape at an upper end portion of the rib and a lower edge portion of the notch portion upward. A second claw portion extending, and the second engagement portion is provided in the second protrusion and forwardly protrudes from the inner surface of the back wall, and penetrates in the vertical direction. The second claw portion is provided with a second through hole into which the second claw portion is inserted from below , a plurality of holes are provided around each wall, and a rivet for fastening the holes of the walls is provided. The operator can temporarily fix the right side wall and the left side wall with respect to the back wall. Therefore, the shape of the back wall, the right side wall, and the left side wall can be maintained while standing on the work table. The operator can easily fasten the contact piece on the right side wall and the contact piece on the left side wall to the left and right edges of the back wall with rivets. Since the front wall, the top wall, and the bottom wall need only be fixed to the temporarily fixed back wall, right side wall, and left side wall, there is no need to change the posture of the control box on the way. Therefore, the man-hour for the control box can be reduced. Since the left and right edges of the back wall are brought into contact with the abutment pieces of the right side wall and the left side wall and rivet fastened, the rigidity of the left and right sides of the back wall can be improved. Since the first protruding portion protrudes forward from the inner surface of the contact piece, the first protruding portion does not jump out to the back side of the control box. Therefore, the beauty of the back side of the control box is not impaired. There is no risk of injury to the operator when transporting the control box. By inserting the second claw portion into the second through hole from below, the operator can temporarily fix the back wall to the rib of the bottom wall. Therefore, the shape can be maintained with the back wall, the right side wall, and the left side wall standing on the bottom wall. The notch of the rib avoids interference with the second protrusion. Therefore, the entire control box can be made smaller as compared with the case where the control box is not provided with a notch.

The perspective view seen from the diagonal front of the machine tool 1. FIG. FIG. 3 is a perspective view of the machine tool 1 viewed from an oblique rear side. The partial exploded perspective view seen from the diagonal front of control box 20 (front wall 26 omission). The partial exploded perspective view seen from the slanting back of control box 20 (front wall 26 omission). The perspective view of the bottom wall 21. FIG. The perspective view which looked at the state which stood the right side wall 22 and the left side wall 23 on the left-right both sides of the bottom wall 21, respectively from diagonally forward. The perspective view which looked at the state which stood the right side wall 22 and the left side wall 23 on the left-right both sides of the bottom wall 21, respectively from diagonally back. The front view of the back wall 24. FIG. FIG. 7 is a perspective view showing a state where a back wall 24 is temporarily assembled between a right side wall 22 and a left side wall 23 shown in FIG. 6. The enlarged view of the part enclosed with the dotted line W1 shown in FIG. The enlarged view of the part enclosed with the dotted line W2 shown in FIG. FIG. 10 is a perspective view illustrating a state in which an upper wall 25 is placed on and fixed to the right side wall 22, the left side wall 23, and the back wall 24 illustrated in FIG. 9. The figure of the modification corresponding to FIG. The figure which shows the engaging structure of the engaging part 257 and the to-be-engaged part 271 which are modifications.

  An embodiment of the present invention will be described with reference to the drawings. In the following description, the diagonally lower left, the diagonally upper right, the right, and the left in FIG. 1 are the front, rear, right, and left of the machine tool 1, respectively. The left-right direction, the front-rear direction, and the up-down direction of the machine tool 1 are the X-axis direction, the Y-axis direction, and the Z-axis direction of the machine tool 1, respectively.

  The structure of the machine tool 1 will be described with reference to FIGS. The machine tool 1 includes a base 2, a machine body 3, a table 10, a tool changer 17 and the like. The base 2 is a substantially rectangular parallelepiped iron base. The machine body 3 is provided at the upper rear of the base 2 and cuts a work (not shown) held on the upper surface of the table 10. The table 10 is provided at the upper center of the base 2 and can be moved in the X-axis direction and the Y-axis direction by an X-axis motor, a Y-axis motor, and a guide mechanism (not shown). The tool changer 17 is fixed to a frame 18 provided on an upper portion of a column 5 (described later) of the machine body 3. The tool changer 17 exchanges the tool T mounted on the main shaft 7 (see FIG. 2) of the machine body 3 with another tool.

  The structure of the machine body 3 will be described with reference to FIGS. The machine body 3 includes a column 5, a spindle head 6, a spindle 7, a control box 20, and the like. The column 5 is erected on the upper rear side of the base 2. The spindle head 6 can be moved up and down in the Z-axis direction along the front surface of the column 5. The main shaft 7 is rotatably supported inside the main shaft head 6. The spindle 7 is equipped with a tool T and is rotated at a high speed by driving the spindle motor 12. The spindle motor 12 is provided on the spindle head 6. The control box 20 is attached to the back side of the column 5. The control box 20 stores various devices inside. The various devices are, for example, an NC control board, a DC switching power supply, a breaker, an inverter for the tool changer 17, a wiring duct, a servo amplifier, and the like. The assembly method and attachment method of the control box 20 will be described later. The control box 20 is provided with the regenerative resistor 11 on the upper surface.

  The structure of the control box 20 will be described with reference to FIGS. As shown in FIGS. 3 and 4, the control box 20 includes a bottom wall 21, a right side wall 22, a left side wall 23, a back wall 24, an upper wall 25, and a front wall 26 (see FIG. 2). When the control box 20 is described, the state viewed from the rear of the machine tool 1 is defined as the front of the control box 20. Therefore, the left and right of the machine tool 1 and the left and right of the control box 20 are opposite. Each wall 21-26 is a metal plate. An operator fastens each wall 21-25 with rivets 90 (refer to Drawing 12), and attaches front wall 26 to the front side so that rotation is possible. When an operator checks the inside of the control box 20 or the like, the worker rotates the front wall 26 to work. Hereinafter, the shape of each wall 21-25 is demonstrated in order.

  The shape of the bottom wall 21 will be described with reference to FIG. The bottom wall 21 includes a plate portion 31, ribs 32 to 35, an L-shaped portion 32A, engaged portions 36 and 37, an opening 31A, a support portion 31B, a rivet hole 40, and the like. The plate portion 31 has a horizontally long rectangular shape in plan view. The rib 32 extends vertically upward from the front end portion of the plate portion 31. The L-shaped portion 32A extends forward from the upper end portion of the rib 32, and the distal end side is bent downward. The rib 33 extends vertically upward from the right end portion of the plate portion 31. The rib 34 extends vertically upward from the left end portion of the plate portion 31. The rib 35 extends vertically upward from the rear end portion of the plate portion 31. The engaged portion 36 is provided on the left end side of the rib 35, and the engaged portion 37 is provided on the right end side of the rib 35. The engaged portion 36 includes a notch portion 38 and a claw portion 39. The notch 38 is formed by notching the upper end of the rib 35 downward in a concave shape. The claw part 39 extends upward from the center of the lower edge part of the notch part 38. The engaged portion 37 has the same shape as the engaged portion 36. The opening 31A leads various wirings to the outside. The support part 31B supports various components. A plurality of rivet holes 40 are provided along the periphery of the bottom wall 21. The rivet hole 40 is a hole for fastening the rivet 90 (see FIG. 3).

  The shape of the left side wall 23 will be described with reference to FIGS. 4, 6, and 7. The left side wall 23 includes a plate portion 51, a contact piece 52, a fixing piece 53, ribs 54 to 56, an L-shaped portion 54A, an engagement portion 57, openings 51A and 51B, a rivet hole 58, and the like. The plate portion 51 has a vertically long rectangular shape when viewed from the left side. The contact piece 52 extends rightward from the rear end portion of the plate portion 51. The extension length is about a quarter of the lateral length of the back wall 24. The contact piece 52 is a portion that comes into contact with the left edge of the back wall 24 from the outside. The fixed piece 53 extends rearward from the right end portion of the contact piece 52. The fixed piece 53 has a plurality of fixed holes 53A along the longitudinal direction. The fixing piece 53 is a portion that contacts the right side surface 5A of the column 5 (see FIG. 1) and is fixed by a screw 95 through the fixing hole 53A.

  The rib 54 extends rightward from the front end portion of the plate portion 51. The L-shaped portion 54A extends forward from the right end portion of the rib 54, and the distal end side is bent leftward. The rib 55 extends rightward from the upper end portion of the plate portion 41. The rib 56 (see FIG. 3) extends rightward from the lower end portion of the plate portion 51. The engaging portion 57 is provided at the approximate center in the left-right direction above the contact piece 52. The engaging portion 57 includes a pair of upper and lower bridges 81 and 82 (see FIG. 10). The bridges 81 and 82 are formed by cutting and raising the abutting piece 52 inwardly (in front). The bridges 81 and 82 are each provided with a through hole 83 inside. The openings 51A and 51B are parts to which various parts are attached. A plurality of rivet holes 58 are provided along the periphery of the left side wall 23. The rivet hole 58 is a hole for fastening the rivet 90 (see FIG. 3).

  The shape of the right side wall 22 will be described with reference to FIGS. The right side wall 22 includes a plate portion 41, a contact piece 42, a fixing piece 43, ribs 44 to 46, an L-shaped portion 44A, an engagement portion 47, a support portion 41A, openings 41B and 41C, a rivet hole 48, and the like. The plate portion 41 has a vertically long rectangular shape when viewed from the right side. The contact piece 42 extends leftward from the rear end portion of the plate portion 41. The extension length is about a quarter of the lateral length of the back wall 24. The contact piece 42 is a portion that comes into contact with the right edge of the back wall 24 from the outside. The fixed piece 43 extends rearward from the left end portion of the contact piece 42. The fixing piece 43 has a plurality of fixing holes 43A along the longitudinal direction. The fixing piece 43 is a portion that contacts the left side surface (not shown) of the column 5 and is fixed by a screw through a fixing hole 43A.

  The rib 44 extends leftward from the front end portion of the plate portion 41. The L-shaped portion 44A extends forward from the left end portion of the rib 44, and the distal end side is bent to the right. The rib 45 extends leftward from the upper end portion of the plate portion 41. The rib 46 (see FIG. 3) extends leftward from the lower end portion of the plate portion 41. The engaging portion 47 is provided at the upper left corner of the contact piece 42 as viewed from the front. The engaging portion 47 has the same shape as the engaging portion 57. The support portion 41A supports various components. The openings 41B and 41C are portions to which various parts are attached. A plurality of rivet holes 48 are provided along the periphery of the right side wall 22. The rivet hole 48 is a hole for fastening the rivet 90.

  The shape of the back wall 24 will be described with reference to FIG. The back wall 24 has a vertically long rectangular shape when viewed from the front. The back wall 24 includes engaged portions 71 and 72, engaging portions 73 and 74, support portions 75A to 75D, rivet holes 78, and the like. The engaged portion 71 is provided near the upper left corner of the back wall 24, and the engaged portion 72 is provided near the upper right corner of the back wall 24. The engaged portion 71 includes an opening 76 and a claw portion 77. The opening 76 is a rectangular opening. The claw portion 77 extends downward from the center of the upper edge portion of the opening 76. The engaged portion 72 has the same shape as the engaged portion 71.

  The engaging portion 73 is provided near the lower left corner of the back wall 24, and the engaging portion 74 is provided near the lower right corner of the back wall 24. The engaging portion 73 includes a pair of upper and lower bridges 85 and 86 (see FIG. 11). The bridges 85 and 86 are formed by cutting and raising the back wall 24 inward (forward) in an arch shape. The bridges 85 and 86 are each provided with a through hole 87 inside. The engaging part 74 has the same shape as the engaging part 73. The support portions 75 </ b> A to 75 </ b> D support various components housed in the control box 20. A plurality of rivet holes 78 are provided along the periphery of the back wall 24. The rivet hole 78 is a hole for fastening the rivet 90.

  The shape of the upper wall 25 will be described with reference to FIGS. The upper wall 25 includes a plate portion 61, ribs 62 to 65, an L-shaped portion 62A, a rivet hole 68, and the like. The plate portion 61 has a horizontally long rectangular shape in plan view. The rib 62 extends vertically downward from the front end portion of the plate portion 61. The L-shaped portion 62A extends forward from the lower end portion of the rib 62, and the distal end side is bent upward. The rib 63 extends vertically downward from the right end portion of the plate portion 61. The rib 64 extends vertically downward from the left end portion of the plate portion 61. The rib 65 extends vertically downward from the rear end portion of the plate portion 61. A plurality of rivet holes 68 are provided along the periphery of the upper wall 25. The rivet hole 68 is a hole for fastening the rivet 90.

  The assembly process of the control box 20 will be described with reference to FIGS. The assembly process of the control box 20 includes a first temporary fixing process, a second temporary fixing process, a third temporary fixing process, and a fastening process.

[First temporary fixing process]
As shown in FIG. 5, the worker places the bottom wall 21 on a work table (not shown). As shown in FIGS. 6 and 7, the operator places the right side wall 22 upright on the right side of the bottom wall 21 and places the left side wall 23 upright on the left side of the bottom wall 21. The right end side of the bottom wall 21 is placed inside the right side wall 22 and placed on the upper surface of the lower rib 46 (see FIG. 3). The left end side of the bottom wall 21 is placed inside the left side wall 23 and placed on the upper surface of the lower rib 56 (see FIG. 3). The right side wall 22 and the left side wall 23 can stand on their own, but are more stable and stand by the weight of the bottom wall 21.

[Second temporary fixing process]
As shown in FIG. 9, the operator places the left and right edges of the outer surface of the back wall 24 against the inner surface of the contact piece 42 of the right side wall 22 and the inner surface of the contact piece 52 of the left side wall 23, and temporarily Stop. As shown in FIG. 10, the operator can move the engaged portion 71 provided on the back wall 24 with respect to the through holes 83 of the bridges 81 and 82 of the engaging portion 57 provided on the contact piece 52 of the left side wall 23. The nail | claw part 77 is inserted from upper direction. The engaged portion 71 engages with the engaging portion 57. Since the claw portion 77 is inserted into the through hole 83, the engaged portion 71 is unlikely to come off from the engaging portion 57.

  The opening 76 of the engaged portion 71 is to avoid interference with the bridges 81 and 82. Therefore, the entire control box 20 can be made smaller as compared with the case where the control box 20 does not include the opening 76. The upper edge of the opening 76 is locked to the upper part of the bridge 81. Therefore, the operator can position the back wall 24 in the vertical direction with respect to the right side wall 22 and the left side wall 23. The engaged portion 72 of the back wall 24 is engaged with the engaging portion 47 provided on the contact piece 42 of the right side wall 22 in the same manner as the engaged portion 71 engages with the engaging portion 57. To do. Therefore, the operator can temporarily fix the back wall 24 to the right side wall 22 and the left side wall 23. Therefore, the shape of the back wall 24, the right side wall 22, and the left side wall 23 can be maintained while standing on the work table.

  Further, as shown in FIG. 11, the operator engages the engagement portion provided on the left end side of the rib 35 of the bottom wall 21 with respect to the through holes 87 of the bridges 85 and 86 of the engagement portion 73 provided on the back wall 24. 36 claw portions 39 are inserted from below. The engaging portion 73 engages with the engaged portion 36. Since the claw portion 39 is inserted into the through hole 87, the engaging portion 73 is difficult to come off from the engaged portion 36. The notched portion 38 of the engaged portion 36 avoids interference with the bridges 85 and 86. Therefore, the entire control box 20 can be made smaller as compared with the case where the control box 20 is not provided with the notch 38. The engaging portion 74 of the back wall 24 is engaged with the engaged portion 37 provided on the right end side of the rib 35 of the bottom wall 21 in the same manner as the engaging portion 73 engages with the engaged portion 36. Match.

  Thus, the operator can temporarily fix the upper part of the back wall 24 to the left side wall 23 and the right side wall 22 and temporarily fix the lower part to the rib 35 of the bottom wall 21. Therefore, in the present embodiment, the entire back wall 24 can be temporarily fixed to the bottom wall 21, the left side wall 23, and the right side wall 22. Further, since the bottom wall 21, the left side wall 23, the right side wall 22 and the back wall 24 can be temporarily fixed together, it is possible to stand up more stably. The positional relationship between the walls 21 to 24 is determined.

[Third temporary fixing process]
As shown in FIG. 12, the worker puts the upper wall 25 on the bottom wall 21, the right side wall 22, the left side wall 23, and the back wall 24 that are self-supporting on the work table from above. The upper surface of the rib 45 of the right side wall 22 and the upper surface of the rib 55 of the left side wall 23 abut against the lower surface of the plate portion 61 of the upper wall 25 to support the upper wall 25 from below. Temporary fixing of the upper wall 25 is completed with respect to the bottom wall 21, the right side wall 22, the left side wall 23, and the back wall 24. The mutual positional relationship between the walls 21 to 25 is determined.

[Fastening process]
As shown in FIG. 12, the worker fastens the rivet 90 and fixes the walls to each other at the portions where the temporarily fixed walls 21 to 25 overlap each other. The bottom wall 21 and the right side wall 22 are fixed by fastening the rivet holes 40 and 48 with the rivet 90. The bottom wall 21 and the left side wall 23 are fixed by fastening the rivet holes 40 and 58 with the rivet 90. The bottom wall 21 and the back wall 24 are fixed by fastening the rivet holes 40 and 78 with the rivet 90. The back wall 24 and the right side wall 22 are fixed by fastening rivet holes 78 and 48 with rivets 90. The back wall 24 and the left side wall 23 are fixed by fastening rivet holes 78 and 58 with rivets 90. The upper wall 25 and the right side wall 22 are fixed by fastening rivet holes 68 and 48 with rivets 90. The upper wall 25 and the left side wall 23 are fixed by fastening rivet holes 68 and 58 with rivets 90. The upper wall 25 and the back wall 24 are fixed by fastening rivet holes 68 and 78 with rivets 90.

  Thus, the worker can hit the rivet 90 at an appropriate position in an appropriate order in a state where the mutual positional relationship between the walls 21 to 25 is determined. For example, the operator can reduce distortion generated in the wall by striking in order from both sides of the wall toward the center. Therefore, the operator can assemble the control box 20 appropriately. Thus, the assembly process of the control box 20 is completed. The front wall 26 (see FIG. 2) is rotatably attached to the left shaft support end portion of the front surface of the control box 20 that opens.

  In the above assembling process, the bottom wall 21, the right side wall 22, the left side wall 23, and the back wall 24 are temporarily fixed together, and the shape can be maintained independently, so that the control can be performed while the bottom wall 21 is left on the work table. The box 20 can be assembled to the end. Therefore, the operator does not have to change the posture of the heavy control box 20 during the assembly process, so that the control box 20 can be assembled easily and quickly. The assembly process can reduce the work load on the worker.

  As shown in FIG. 10, the bridges 81 and 82 protrude forward from the inner surface of the contact piece 52 of the left side wall 23 (the contact piece 42 of the right side wall 22). Does not jump out. Therefore, the beauty of the back side of the control box 20 is not impaired. When transporting the control box 20, there is no risk of injury to the operator. The same applies to the bridges 85 and 86 (see FIG. 11) provided on the back wall 24.

  As shown in FIGS. 1 and 2, the operator fixes the fixing pieces 43 and 53 of the control box 20 to the left side surface (not shown) and the right side surface 5A of the column 5 with a plurality of screws 95, respectively. Therefore, the control box 20 can be attached to the back side of the column 5. The fixing pieces 43 and 53 are formed by part of the right side wall 22 and the left side wall 23, respectively. Therefore, the work of fixing the fixing piece to the back wall 24 by welding or rivet is not necessary. Since the fixing pieces 43 and 53 are a part of the right side wall 22 and the left side wall 23, the rigidity can be improved as compared with those fixed later.

  In the above description, the engaged portions 71 and 72 correspond to the first engaged portion of the present invention, the opening 76 corresponds to the opening of the present invention, and the claw portion 77 corresponds to the first claw portion of the present invention. It corresponds to. The engaging portions 47 and 57 correspond to the first engaging portion of the present invention, the bridges 81 and 82 correspond to the first protruding portion of the present invention, and the through hole 83 corresponds to the first through hole of the present invention. The engaged parts 36 and 37 correspond to the second engaged part of the present invention, the notch part 38 corresponds to the notch part of the present invention, and the claw part 39 corresponds to the second claw part of the present invention. . The engaging portions 73 and 74 correspond to the second engaging portion of the present invention, the bridges 85 and 86 correspond to the second projecting portion of the present invention, and the through hole 87 corresponds to the second through hole of the present invention.

  As described above, the control box 20 of this embodiment stores the control board of the machine tool 1 and can be attached to the machine tool 1. The control box 20 is formed by fixing a bottom wall 21, a right side wall 22, a left side wall 23, a back wall 24, an upper wall 25, and a front wall 26 in a rectangular parallelepiped shape. The right side wall 22 and the left side wall 23 are each provided with plate-like contact pieces 42 and 52 at respective rear end portions. The contact pieces 42 and 52 are portions that contact the left and right edges of the back wall 24 from the outside. The contact pieces 42 and 52 are provided with engaging portions 47 and 57 respectively on the upper portions. The back wall 24 includes engaged portions 71 and 72 at upper portions of both left and right edges. The engaging portions 57 and 47 can be engaged with the engaged portions 71 and 72, respectively.

  The assembly process of the control box 20 includes a second temporary fixing process and a fastening process. In the second temporary fixing step, the right side wall 22 and the left side wall 23 are arranged to face each other. The back wall 24 is disposed so that the outer surfaces of the left and right edges of the back wall 24 abut against the inner surface of the contact piece 42 of the right wall 22 and the inner surface of the contact piece 52 of the left wall 23. Further, the engaging portions 57 and 47 are engaged with the engaged portions 71 and 72. Therefore, the operator can temporarily fix the right side wall 22 and the left side wall 23 to the back wall 24. The back wall 24, the right side wall 22, and the left side wall 23 can retain their shapes while standing on the work table. In the fastening process, the operator can easily fasten the contact piece 42 of the right side wall 22 and the contact piece 52 of the left side wall 23 with the rivets 90 to the left and right edges of the back wall 24. The bottom wall 21, the upper wall 25, and the front wall 26 may be fixed to the temporarily fixed back wall 24, right side wall 22, and left side wall 23, respectively. The operator does not have to change the posture of the control box 20 in the middle of the assembly process. Since the abutting pieces 42 and 52 of the right side wall 22 and the left side wall 23 are brought into contact with the left and right edges of the back wall 24 and fastened by the rivets 90, the rigidity of the left and right sides of the back wall 24 can be improved. Therefore, the rigidity of the entire control box 20 can be improved.

  The present invention is not limited to the above embodiment, and various modifications can be made. In the above embodiment, in order to temporarily fix the left and right edge portions of the back wall 24 to the right side wall 22 and the left side wall 23, the engaged portions 71 and 72 are provided on the upper portions of the left and right edge portions of the back wall 24, Engaging portions 47 and 57 are provided on the contact piece 42 of the right side wall 22 and the contact piece 52 of the left side wall 23. For example, as shown in FIG. 13, the engaging structure of the engaged portion 71 and the engaging portion 57 is such that the claw portion 77 is inserted into the through hole 83 of the bridges 81 and 82 from above, but can be engaged with each other. Any structure can be used.

  For example, as shown in FIG. 13, an L-shaped engaged portion 101 is provided on the inner surface of the contact piece 52, and a rectangular opening 176 is provided on the back wall 24. The upper edge of 176 may be hooked. Even if it is such a structure, the effect similar to the said embodiment can be acquired.

  In the above embodiment, the upper portions of the left and right edges of the back wall 24 are temporarily fixed to the right wall 22 and the left wall 23, and the lower portions of the left and right edges of the back wall 24 are temporarily attached to the ribs 35 of the bottom wall 21. It has stopped. For example, the lower portions of the left and right edges of the back wall 24 may be temporarily fixed to the right side wall 22 and the left side wall 23.

  For example, as shown in FIG. 14, an engaged portion 271 is provided near the lower left corner of the back wall 24, and an engaging portion 257 is provided below the contact piece 52 of the left wall 23. The engaged portion 271 includes an opening 276 and a claw portion 277. The claw portion 277 extends downward from the center of the upper edge portion of the opening 276. The engaging portion 257 includes a pair of upper and lower bridges 281 and 282 and a through hole 283. Similarly to the structure shown in FIG. 10, the operator inserts the claw portion 277 into the through holes 283 of the bridges 281 and 282 from above. Therefore, the lower part of the left edge of the back wall 24 can be temporarily fixed to the left wall 23. The rib 35 of the bottom wall 21 includes a notch 35A. The cutout portion 35A avoids interference with the bridges 281 and 282. Therefore, the entire control box can be made smaller as compared with the case where the control box does not include the notch portion 35A. A similar structure may be provided in the vicinity of the lower right corner of the back wall 24.

  In the above embodiment, the engaging portion 57 is constituted by a pair of upper and lower bridges 81 and 82, but it may be constituted by one bridge or a plurality of bridges. The bridges 81 and 82 are formed by cutting and raising the contact piece 52, but other members may be fixed by welding or the like.

  The control box 20 of the above embodiment is attached to the column 5, but may be attached to the other part of the machine tool 1 or may be attached to a member other than the machine tool 1.

DESCRIPTION OF SYMBOLS 1 Machine tool 20 Control box 21 Bottom wall 22 Right side wall 23 Left side wall 24 Back wall 25 Upper wall 26 Front wall 35 Rib 36, 37 Engaged part 38 Notch part 39 Claw part 40, 48, 58, 68, 78 Rivet Holes 42, 52 Abutting pieces 47, 57 Engaging parts 71, 72 Engaged parts 73, 74 Engaging parts 76 Opening parts 77 Claw parts 81, 82 Bridge 83 Through holes 85, 86 Bridges 87 Through holes 90 Rivet

Claims (4)

Assembling a control box that stores a control board of a machine tool and can be attached to the machine tool, the front wall, right side wall, left side wall, back wall, upper wall, and bottom wall being fixed in a rectangular parallelepiped shape. In the method
The right side wall and the left side wall are each provided with a plate-like contact piece that comes into contact with the left and right edges of the back wall from the outside at each rear end,
The contact piece includes a first engagement portion engaged with the first engaged portion provided respectively at the top of the left and right edges of the back wall at the top,
The bottom wall includes a rib at the rear end that extends upward and contacts the inner surface of the back wall,
The rib includes a second engaged portion that engages with a second engaging portion respectively provided at a lower portion of the left and right edge portions of the back wall, on both left and right ends,
The left and right edges of the back wall with respect to the inner surface of the contact piece of the right side wall and the inner surface of the contact piece of the left side wall in a state where the right side wall and the left side wall are arranged to face each other The back wall is disposed so that the outer surface of the first wall is in contact, and the first engagement portion is engaged with the first engaged portion, whereby the right side wall and the left side wall are temporarily connected to the back wall. And stopping the rib against the rib by contacting the inner surface of the back wall against the outer surface of the rib of the bottom wall and engaging the second engaging portion with the second engaged portion. A temporary fixing step of temporarily fixing the lower portion of the back wall ;
In the temporary fixing step, with the right side wall and the left side wall temporarily fixed to the back wall, the contact piece of the right side wall and the left side with respect to the left and right edges of the back wall the contact piece of the wall with fastening respectively by rivets, the lower portion of the back wall to the ribs in a state of being temporarily fixed, with the rivet, to the left and right edges of the back wall, the right side An assembly method of a control box, comprising: a fastening step of fastening the contact piece of the wall and the contact piece of the left side wall, and further fastening the rib and the lower part of the back wall . The second engaged portion is
A notch provided in a concave shape at the upper end of the rib;
A second claw portion extending downward from the lower edge of the notch,
The second engaging portion is
A second projecting portion projecting forward from the inner surface of the back wall;
A second through hole provided in the second protrusion and penetrating in the vertical direction;
In the temporary fixing step,
By inserting the second hook portion from below against the second through-hole, the control according to claim 1, wherein the second engagement portion is characterized by engaging said second engaged portion How to assemble the box. The first engaged portion is
An opening,
A first claw portion extending downward from the upper edge of the opening,
The first engaging portion is
A first protrusion protruding forward from the inner surface of the contact piece;
A first through hole provided in the first protrusion and penetrating in a vertical direction;
In the temporary fixing step,
The first claw portion is inserted from above into the first through hole, and the upper edge portion of the opening is locked to the upper portion of the first projecting portion, whereby the first engagement portion is control box assembly method according to claim 1 or 2, characterized in that to engage to an engaged portion. In a control box that stores a control board of a machine tool and can be attached to the machine tool, a control box in which a front wall, a right side wall, a left side wall, a back wall, an upper wall, and a bottom wall are fixed in a rectangular parallelepiped shape,
The right side wall and the left side wall are each provided with a plate-like contact piece that comes into contact with the left and right edges of the back wall from the outside at each rear end,
The contact piece includes a first engagement portion engaged with the first engaged portion provided respectively at the top of the left and right edges of the back wall at the top,
The bottom wall includes a rib at the rear end that extends upward and contacts the inner surface of the back wall,
The rib includes a second engaged portion that engages with a second engaging portion respectively provided at a lower portion of the left and right edge portions of the back wall, on both left and right ends,
The first engaged portion is
An opening,
A first claw portion extending downward from the upper edge of the opening,
The first engaging portion is
A first protrusion that protrudes forward from the inner surface of the contact piece through the opening and that the upper edge of the opening is locked;
A first through hole provided in the first projecting portion and penetrating in a vertical direction, the first claw portion being inserted from above;
The second engaged portion is
A notch provided in a concave shape at the upper end of the rib;
A second claw portion extending upward from a lower edge portion of the notch portion;
With
The second engaging portion is
A second projecting portion projecting forward from the inner surface of the back wall;
A second through hole provided in the second projecting portion and penetrating in the vertical direction; and the second claw portion is inserted from below.
With
A control box comprising a plurality of holes around each wall and a rivet that fastens the holes in each wall.

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