Holding unit, control panel, and machine tool

Abstract

To provide a holding unit capable of suppressing deterioration of a first holding part and a second holding part, a control panel, and a machine tool.SOLUTION: The control panel includes a storage box, an insertion hole 25, and a holding unit 30. The storage box stores an electrical component. The insertion hole 25 is provided on a lower wall 212 of the housing box, and the electric wire W can be inserted. The holding unit 30 can be attached around the insertion hole 25 and holds the electric wire W. The holding unit 30 includes a first holding part 60, a cover 50, and a second holding part 70. The first clamping portion 60 is provided on the upper surface of the lower wall 212, and is disposed to be shifted forward with respect to the insertion hole 25. The cover 50 includes a lid wall 511. The lid wall 511 extends in the front-rear direction and the left-right direction. The lid wall 511 is separated upward from the lower wall 212 and covers the insertion hole 25 and the first clamping portion 60 in a plan view. The second clamping part 70 protrudes downward from the lid wall 511 toward the first clamping part 60 and clamps the electric wire W between the first clamping part 60 and the second clamping part 70.SELECTED DRAWING: Figure 11

Description

[Technical Field]

[0001] The present invention relates to a clamping unit, a control panel, and a machine tool. [Background technology]

[0002] A control panel including a storage box that stores electrical components for controlling a machine tool is known. The control panel described in Patent Document 1 includes an insertion hole and a clamping member. The insertion hole is provided in a predetermined wall that constitutes the storage box. An electric wire is inserted through the insertion hole. The clamping member has a first clamping portion and a second clamping portion. The first clamping portion has a first extending plate, a first elastic portion, and a second elastic portion. The first extending plate extends in a direction away from the predetermined wall. The first elastic portion and the second elastic portion protrude from the first extending plate toward the second clamping portion. The second clamping portion has a second extending plate and an opposing elastic portion. The second extending plate extends in a direction away from the predetermined wall. The opposing elastic portion protrudes from the second extending plate toward the first clamping portion. The clamping member clamps the electric wire between the first elastic portion, the second elastic portion, and the opposing elastic portion. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2022-156269 Summary of the Invention [Problem to be solved by the invention]

[0004] In the control panel, the first elastic portion and the opposing elastic portion are exposed to the outside of the storage box through the insertion hole, which may cause deterioration of the first elastic portion and the opposing elastic portion due to dust generated by machining the machine tool and cleaning fluid used in machining the machine tool.

[0005] An object of the present invention is to provide a clamping unit, a control panel, and a machine tool that can suppress deterioration of the first clamping section and the second clamping section. [Means for solving the problem]

[0006] The clamping unit according to a first aspect is a control panel having a storage box that stores electrical components for controlling a machine tool within a space surrounded by a plurality of wall portions, and a through hole formed in a predetermined wall that is part of the plurality of wall portions, through which an electric wire electrically connected to the electric component can be inserted, and is attachable to the periphery of the through hole and clamps the electric wire, characterized in that it comprises: a first clamping portion that is fixed to the inner surface of the predetermined wall and is positioned offset from the through hole in the extension direction of the predetermined wall; a cover that includes a cover wall that is spaced from the predetermined wall in the inward direction of the storage box in the intersecting direction of the predetermined wall, extends in the extension direction, and covers the through hole and the first clamping portion when viewed from the inward direction; and a second clamping portion that protrudes from the cover wall toward the first clamping portion and clamps the electric wire between itself and the first clamping portion.

[0007] According to the first aspect, the first clamping portion and the second clamping portion clamp the electric wire inside the storage box at a position offset from the insertion hole in the extension direction of the predetermined wall. Therefore, dust and cleaning liquid are less likely to adhere to the first clamping portion and the second clamping portion, and the clamping unit can suppress deterioration of the first clamping portion and the second clamping portion.

[0008] In a first aspect, the inner surface may include a detachable mounting plate, and the first clamping portion may be provided on the inner surface by being supported by the mounting plate. In this manner, the first clamping portion is supported by the detachable mounting plate on a predetermined wall. Therefore, the clamping unit can suppress deterioration of the first clamping portion and the second clamping portion in various storage boxes.

[0009] In a first aspect, the mounting plate may have a mounting hole that communicates with the insertion hole when attached to the inner surface, and the cover may be box-shaped with an opening in the extension direction and be detachable from the mounting plate. When the cover is attached to the mounting plate, the second clamping portion presses the first clamping portion evenly. Therefore, the clamping unit can stably clamp the electric wire between the first clamping portion and the second clamping portion.

[0010] In a first aspect, the mounting plate may include a resilient seal member that contacts the cover when the cover is attached to the mounting plate. The seal member between the mounting plate and the cover makes it difficult for dust and cleaning liquid to penetrate the small gap between the mounting plate and the cover. Therefore, the clamping unit can prevent dust and cleaning liquid from penetrating into the storage box.

[0011] In a first aspect, the clamping unit includes an extending wall located further in the extension direction than the first clamping portion, and the extending wall may be provided with a fixing hole for fixing the electric wire arranged inside the cover. Since the electric wire arranged inside the cover is fixed via the fixing hole, the clamping unit can stably clamp the electric wire between the first clamping portion and the second clamping portion.

[0012] A control panel according to a second aspect is characterized by including the clamping unit according to the first aspect. The second aspect has the same effects as the first aspect.

[0013] A machine tool according to a third aspect is characterized by including the clamping unit according to the first aspect. The third aspect has the same effects as the first aspect. [Brief explanation of the drawings]

[0014] [Figure 1] FIG. 2 is a perspective view of the machine tool 1 as seen from above the front right. [Figure 2] FIG. 2 is a perspective view of the control panel 20 seen from the upper left rear. [Figure 3] FIG. 2 is a perspective view of the control panel 20 with the clamping unit 30 removed, viewed from the upper left rear. [Figure 4] FIG. 2 is a left side view of the control panel 20 around the clamping unit 30 as viewed from the upper left rear. [Figure 5] FIG. 4 is a perspective view of the base 40 as seen from the upper left rear. [Figure 6] FIG. 4 is a perspective view of the base 40 viewed from the upper left front. [Figure 7] FIG. 2 is a plan view of the lower wall 212 to which the base 40 is fixed. [Figure 8] FIG. 4 is a perspective view of the cover 50 as seen from the upper left rear. [Figure 9]FIG. 4 is a perspective view of the cover 50 as viewed from the upper left front. [Figure 10] FIG. 4 is a perspective view of the cover 50 as viewed from the lower rear left. [Figure 11] 2 is a cross-sectional view of the control panel 20 taken along a vertical plane passing through the center of the clamping unit 30 in the left-right direction. FIG. [Figure 12] FIG. 2 is a diagram showing a clamping unit 30 provided on the left wall 215. [Figure 13] 10 is a diagram showing a left wall 215 provided with an insertion hole 250, a base 40, and a cover 50 according to a modified example. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0015] An embodiment of the present invention will be described below. In the following description, left and right, front and rear, and up and down will be used as indicated by arrows in the drawings. The left and right directions, front and rear directions, and up and down directions of the machine tool 1 correspond to the X-axis direction, Y-axis direction, and Z-axis direction of the machine tool 1, respectively. The orientation of the control panel 20 also follows this pattern.

[0016] The structure of machine tool 1 will be described with reference to Figure 1. Machine tool 1 is a vertical machine tool with a spindle 9 extending in the Z-axis direction. Machine tool 1 comprises a base 2, a machine section 5, a spindle 9, a machine cover (not shown), and a control panel 20. Base 2 is an iron base. Machine section 5 is provided at the upper rear of base 2. Machine section 5 rotatably holds spindle 9. Tool 3 is attached to spindle 9, and it performs cutting processes on a workpiece (not shown) fixed to the top of work table 13. Work table 13 is provided at the upper front of base 2. A machine cover is fixed to the top of base 2 and surrounds the machine section 5 and work table 13. A cleaning fluid is sprayed inside the machine cover to clean and cool the workpiece. Dust is also generated during cutting of the workpiece.

[0017] The structure of the control panel 20 will be described with reference to Figures 2 to 11. As shown in Figures 2 and 3, the control panel 20 includes a storage box 21 and a clamping unit 30. The storage box 21 is substantially rectangular, and is provided at the rear of the machine section 5 (see Figure 1). The storage box 21 stores electrical components 90 that control the machine tool 1. The electrical components 90 include, for example, an input / output board, a control board, a DC switching power supply, a breaker, an inverter, a servo amplifier, etc. The electrical components 90 are driven by receiving power from a power source external to the machine tool 1.

[0018] The storage box 21 has a front wall 211, a lower wall 212, an upper wall 213, a right wall 214, and a left wall 215. The front wall 211 is rectangular and extends in the vertical direction. The front wall 211 is fixed to the rear of the machine unit 5. The lower wall 212 extends rearward from the lower end of the front wall 211. The upper wall 213 extends rearward from the upper end of the front wall 211. The right wall 214 extends rearward from the right end of the front wall 211 and connects to the right end of the lower wall 212 and the right end of the upper wall 213. The left wall 215 extends rearward from the left end of the front wall 211 and connects to the left end of the lower wall 212 and the left end of the upper wall 213.

[0019] The storage box 21 is provided with an opening 22 that opens the storage box 21 to the rear. The storage box 21 is equipped with a door 23 that opens and closes the opening 22. For example, when inspecting the control panel 20, an operator opens the door 23 and inspects, replaces, repairs, etc., the various electrical components 90. A grip 24 that can switch between locking and unlocking the door 23 is provided on the lower left side of the door 23. The grip 24 is gripped by the operator when opening or closing the door 23, and switches between locking and unlocking the door 23 in response to the operator's operation.

[0020] 3, an insertion hole 25 is provided in the center of the lower wall 212, penetrating the lower wall 212 in the up-down direction. The insertion hole 25 has a rectangular shape that is longer in the left-right direction than in the front-rear direction in a plan view (see FIG. 7).

[0021] 2 and 4, the clamping unit 30 is attached to the upper surface of the bottom wall 212 inside the storage box 21. As will be described in detail later, the clamping unit 30 clamps the electric wires W inserted through the insertion holes 25 and prevents dust, cutting fluid, etc. from entering the inside of the storage box 21 through the insertion holes 25. The clamping unit 30 includes a base 40, a first clamping portion 60, a cover 50, and a second clamping portion 70.

[0022] As shown in FIGS. 5 to 7 , the base 40 is fixed to the upper surface of the lower wall 212. The base 40 includes a mounting plate 41, a seal member 42, a base plate 43, nuts 44, 451, 452, and an extension wall 46. The mounting plate 41 is a generally rectangular plate. The mounting plate 41 is made of, for example, metal. The mounting plate 41 is longer in the left-right direction than in the front-to-rear direction in a plan view. The right end of the mounting plate 41 is located between the right end of the insertion hole 25 and the right end of the lower wall 212 in the left-to-right direction. The left end of the mounting plate 41 is located between the left end of the insertion hole 25 and the left end of the lower wall 212 in the left-to-right direction. The front end of the mounting plate 41 is located between the front end of the insertion hole 25 and the front end of the lower wall 212 in the front-to-rear direction. The rear end of the mounting plate 41 is located between the rear end of the insertion hole 25 and the rear end of the lower wall 212 in the left-to-right direction. In other words, the mounting plate 41 covers the insertion hole 25 in a plan view. More specifically, the rear portion of the mounting plate 41 covers the insertion hole 25 in a plan view.

[0023] The mounting plate 41 is provided with a mounting hole 49, multiple through holes 47, and multiple screw holes 45. The mounting hole 49 penetrates the rear portion of the mounting plate 41 in the up-down direction. The mounting hole 49 has a rectangular shape that is longer in the left-right direction than in the front-to-rear direction. The right and left ends of the mounting hole 49 are located between the right and left ends of the insertion hole 25 in the left-to-right direction. The front and rear ends of the mounting hole 49 are located between the front and rear ends of the insertion hole 25 in the front-to-rear direction. In other words, the mounting hole 49 is located inside the insertion hole 25 in a plan view. The mounting hole 49 communicates with the insertion hole 25. The portion of the insertion hole 25 that does not overlap with the mounting hole 49 in a plan view is covered by the mounting plate 41. Therefore, the electric wire W is inserted through the insertion hole 25 and then through the mounting hole 49.

[0024] The plurality of through holes 47 penetrate the mounting plate 41 in the vertical direction. The plurality of through holes 47 are provided outside the insertion holes 25 in a plan view and surround the insertion holes 25 in a plan view. Bolts (not shown) are inserted through the plurality of through holes 47 and fastened to screw holes provided in the lower wall 212, thereby fixing the mounting plate 41 to the upper surface of the lower wall 212. The plurality of screw holes 45 are recesses recessed downward from the upper surface of the mounting plate 41 and are provided with screw grooves. The plurality of screw holes 45 are located at positions overlapping with through holes 48, which will be described later, in a plan view.

[0025] The sealing member 42 is provided on the upper surface of the mounting plate 41. The sealing member 42 is elastic and is made of, for example, silicone rubber. The sealing member 42 includes a right portion 423, a left portion 424, a rear connecting portion 422, and a front connecting portion 421. The right portion 423 and the left portion 424 are plate-shaped extending in the front-rear direction and are aligned in the left-right direction. The right portion 423 is located to the right of the mounting hole 49. The right end of the right portion 423 is located at approximately the same position as the right end of the insertion hole 25 in the left-right direction. The front end of the right portion 423 is located at approximately the same position as the front end of the mounting plate 41. The rear end of the right portion 423 is located at approximately the same position as the rear end of the insertion hole 25 in the front-rear direction.

[0026] The left portion 424 is located to the left of the mounting hole 49. The left end of the left portion 424 is located at approximately the same position as the left end of the insertion hole 25 in the left-right direction. The front end of the left portion 424 is located at approximately the same position as the front end of the mounting plate 41. The rear end of the left portion 424 is located at approximately the same position as the rear end of the right portion 423 and the rear end of the insertion hole 25 in the front-rear direction.

[0027] The rear connection portion 422 and the front connection portion 421 are plate-shaped and extend in the left-right direction, and are aligned in the front-rear direction. The rear connection portion 422 connects to the left rear end of the right portion 423 and the right rear end of the left portion 424. The rear connection portion 422 is located rearward of the mounting hole 49. The rear end of the rear connection portion 422 is located at approximately the same position as the rear end of the insertion hole 25 in the front-rear direction.

[0028] The front connection portion 421 connects to the left end of the right portion 423 and the right end of the left portion 424 forward of the mounting hole 49. The front connection portion 421 is located between the front end of the insertion hole 25 and the mounting hole 49 in the front-to-rear direction. The front connection portion 421 is located rearward of the center of the mounting plate 41 in the front-to-rear direction. In the seal member 42, the opening defined by the front connection portion 421, the rear connection portion 422, the right portion 423, and the left portion 424 is called the opening 429. The mounting hole 49 is located inside the opening 429 in a plan view. The opening 429 is located inside the insertion hole 25 in a plan view. The electric wire W is inserted through the mounting hole 49 and then through the opening 429.

[0029] The sealing member 42 is provided with a plurality of through holes 48 that penetrate the sealing member 42 in the up-down direction. In this embodiment, seven through holes 48 are provided in the sealing member 42 as a whole. More specifically, three through holes 48 are provided in the right portion 423, three in the left portion 424, and one in the rear connecting portion 422. The three through holes 48 provided in the right portion 423 are aligned in the front-rear direction across the entire right portion 423. The three through holes 48 provided in the left portion 424 are aligned in the front-rear direction across the entire left portion 424. The through hole 48 provided in the rear connecting portion 422 is located at the center of the rear connecting portion 422 in the left-right direction.

[0030] The base plate 43 is provided at the front end of the upper surface of the mounting plate 41. The base plate 43 has a rectangular shape that is longer in the left-right direction than in the front-to-back direction. The base plate 43 is located between the right part 423 and the left part 424 of the sealing member 42 in the left-to-right direction. The front end of the base plate 43 is located at approximately the same position as the front end of the mounting plate 41 in the front-to-back direction. The upper surface of the base plate 43 is located above the sealing member 42.

[0031] Nuts 44, 451, 452 extend upward from the upper surface of base plate 43. Nuts 44, 451, 452 have screw holes that open upward and extend in the vertical direction. Nut 44 is provided in the center in the left-right direction at the rear of base plate 43. Nut 451 is provided at the right front end of base plate 43. Nut 452 is provided at the left front end of base plate 43. In other words, nut 44 and nuts 451, 452 are arranged offset in the front-rear direction. The vertical length of nut 451 is approximately the same as the vertical length of nut 452, but shorter than the vertical length of nut 44.

[0032] The extension wall 46 has a rectangular shape that extends more in the left-right direction than in the front-to-rear direction. The extension wall 46 connects to the upper ends of the nuts 451 and 452. The extension wall 46 is located below the upper ends of the nuts 44. The extension wall 46 is located inside the base plate 43 in a plan view. That is, the extension wall 46 is located between the right portion 423 and the left portion 424 of the sealing member 42 in the left-to-right direction. The rear end of the extension wall 46 is located forward of the nut 44. The extension wall 46 is provided with a plurality of fixing holes 460 that penetrate the extension wall 46 in the front-to-rear direction. The plurality of fixing holes 460 are arranged in the extension wall 46 in the left-to-right direction.

[0033] 5 to 7, the first clamping portion 60 is fixed to the upper surface of the mounting plate 41 with an adhesive and has elasticity. The first clamping portion 60 is, for example, a sponge made of polyurethane resin. In plan view, the first clamping portion 60 is surrounded by the right portion 423 and left portion 424 of the sealing member 42, the front connecting portion 421, and the base plate 43. The first clamping portion 60 includes a front elastic portion 61, a rear elastic portion 62, a right elastic portion 63, and a left elastic portion 64.

[0034] The front elastic portion 61 and the rear elastic portion 62 are rectangular parallelepipeds extending in the left-right direction. The front elastic portion 61 is located between the base plate 43 and the front end of the insertion hole 25 in the front-rear direction. The rear elastic portion 62 is located between the front end of the insertion hole 25 and the front connecting portion 421 in the front-rear direction. The right elastic portion 63 and the left elastic portion 64 are rectangular parallelepipeds extending in the front-rear direction. The right elastic portion 63 connects to the right end of the front elastic portion 61 and the right end of the rear elastic portion 62. The left elastic portion 64 connects to the left end of the front elastic portion 61 and the left end of the rear elastic portion 62. In other words, the first clamping portion 60 extends in the left-right direction and the front-rear direction. The upper end of the first clamping portion 60 that is not elastically deformed is located at approximately the same position as the upper end of the nut 44 in the up-down direction.

[0035] As shown in Figures 8 to 10, the cover 50 is made of metal and is detachable from the base 40 (see Figure 11). The cover 50 has a box body 51 and a joint wall 52. The box body 51 includes a rear wall 512, a right wall 513, a left wall 514, and a cover wall 511. The rear wall 512 has a rectangular shape that is longer in the left-right direction than in the up-down direction when viewed from behind. The right wall 513 extends forward from the right end of the rear wall 512. The left wall 514 extends forward from the left end of the rear wall 512. The right wall 513 and the left wall 514 have a rectangular shape that is longer in the front-to-back direction than in the up-to-down direction when viewed from the side.

[0036] The cover wall 511 has a rectangular shape that is longer in the left-right direction than in the front-to-rear direction in a plan view. The rear end of the cover wall 511 is connected to the upper end of the rear wall 512, the right end of the cover wall 511 is connected to the upper end of the right wall 513, and the left end of the cover wall 511 is connected to the upper end of the left wall 514. In other words, the box body 51 is box-shaped and open downward and forward. A through-hole 54 is provided in the center of the front end of the cover wall 511 in the left-to-right direction.

[0037] The joint wall 52 includes a right joint wall 523, a left joint wall 524, and a rear joint wall 522. The right joint wall 523 extends rightward from the lower end of the right wall 513. The left joint wall 524 extends leftward from the lower end of the left wall 514. The right joint wall 523 and the left joint wall 524 have a rectangular shape that is longer in the front-to-rear direction than in the left-to-right direction in a side view. The front ends of the right joint wall 523 and the left joint wall 524 are located at approximately the same position as the rear wall 512 in the front-to-rear direction.

[0038] The joint wall 522 has a rectangular shape that is longer in the left-right direction than in the front-to-back direction in a side view. The front end of the joint wall 522 is connected to the lower end of the rear wall 512, the front end of the right wall 513, and the front end of the left wall 514. The joint wall 52 is provided with a plurality of through holes 58 that penetrate the joint wall 52 in the up-down direction. When the cover 50 is attached to the base 40, the plurality of through holes 58 are positioned to overlap the plurality of through holes 48 in a plan view.

[0039] As shown in FIGS. 8 to 10 , the second clamping portion 70 is fixed to the underside of the cover wall 511 with an adhesive and has elasticity. The second clamping portion 70 is, for example, a sponge made of polyurethane resin. The second clamping portion 70 includes a front elastic portion 71, a rear elastic portion 72, a right elastic portion 73, and a left elastic portion 74. The front elastic portion 71 and the rear elastic portion 72 are rectangular parallelepipeds extending in the left-right direction. The front elastic portion 71 is located between the through-hole 54 and the center of the cover wall 511 in the front-rear direction. The rear elastic portion 72 is located in the center of the cover wall 511 in the front-rear direction. The cover 50 has a space surrounded by the cover wall 511, the rear wall 512, the right wall 513, the left wall 514, and the rear elastic portion 72.

[0040] The right elastic portion 73 and the left elastic portion 74 are rectangular parallelepipeds extending in the front-to-rear direction. The right elastic portion 73 is connected to the right end of the front elastic portion 71 and the right end of the rear elastic portion 72, and is located to the left of the right wall 513. The left elastic portion 74 is connected to the left end of the front elastic portion 71 and the left end of the rear elastic portion 72, and is located to the right of the left wall 514. That is, the second clamping portion 70 extends downward from the cover wall 511 and extends in the left-right and front-to-rear directions inside the box body 51 in a bottom view. The lower end of the second clamping portion 70 that is not elastically deformed is located above the joint wall 52.

[0041] Attachment of the cover 50 to the base 40 and clamping of the electric wire W will be described with reference to FIG. 11 . With the base 40 fixed to the upper surface of the lower wall 212, the worker inserts the electric wire W through the insertion hole 25, the attachment hole 49, and the opening 429 in this order. The electric wire W that has passed through the opening 429 extends forward above the base 40. The electric wire W comes into contact with the first clamping portion 60 from above. The electric wire W is fixed to the extension wall 46 forward of the first clamping portion 60 by a cable tie (not shown) that passes through the fixing hole 460. The electric wire W extends upward in front of the extension wall 46.

[0042] The cover 50 is attached to the base 40 from above inside the storage box 21. In the joint wall 52, the rear joint wall 522 overlaps the rear connection portion 422, the right joint wall 523 overlaps the right portion 423 of the seal member 42, and the left joint wall 524 overlaps the left portion 424 of the seal member 42. A bolt (not shown) is inserted from above through the through hole 58 and then through hole 48 and fastened to the screw hole 45. A bolt (not shown) is inserted from above through the through hole 54 and fastened to the screw hole of the nut 44. In this way, the cover 50 is attached to the base 40.

[0043] When the cover 50 is attached to the base 40, the lid wall 511 is spaced upward from the bottom wall 212 and covers the insertion hole 25, the first clamping portion 60, and the extension wall 46 in a plan view. The electric wire W extends forward in the space inside the box body 51. The front elastic portion 71 contacts the front elastic portion 61 from above, the rear elastic portion 72 contacts the rear elastic portion 62 from above, the right elastic portion 73 contacts the right elastic portion 63 from above, and the left elastic portion 74 contacts the left elastic portion 64 from above. As a result, the first clamping portion 60 and the second clamping portion 70 clamp the electric wire W. The first clamping portion 60 and the second clamping portion 70 are positioned to be shifted forward with respect to the insertion hole 25 in a plan view.

[0044] As described above, the control panel 20 includes a storage box 21 and an insertion hole 25. The storage box 21 stores the electrical component 90. The bottom wall 212 of the storage box 21 extends in the front-rear and left-right directions. The insertion hole 25 is provided in the bottom wall 212, and an electric wire W electrically connected to the electrical component 90 can be inserted therethrough. The clamping unit 30 can be attached around the insertion hole 25 and clamps the electric wire W. The clamping unit 30 includes a first clamping portion 60, a cover 50, and a second clamping portion 70. The first clamping portion 60 is provided on the upper surface of the bottom wall 212 and is positioned shifted forward with respect to the insertion hole 25. The cover 50 includes a lid wall 511. The lid wall 511 extends in the front-rear and left-right directions. The lid wall 511 is spaced upward from the bottom wall 212 and covers the insertion hole 25 and the first clamping portion 60 in a plan view. The second clamping portion 70 protrudes downward from the cover wall 511 toward the first clamping portion 60 and clamps the electric wire W between itself and the first clamping portion 60. As a result, the first clamping portion 60 and the second clamping portion 70 clamp the electric wire W inside the storage box 21 and at a position shifted forward relative to the insertion hole 25, which is the direction in which the bottom wall 212 extends. Therefore, dust and cleaning liquid are less likely to adhere to the first clamping portion 60 and the second clamping portion 70 compared to a case in which the first clamping portion 60 and the second clamping portion 70 are not shifted in the direction in which the bottom wall 212 extends. Therefore, the control panel 20 can suppress deterioration of the first clamping portion 60 and the second clamping portion 70.

[0045] The control panel 20 has a mounting plate 41 that can be attached to the upper surface of the bottom wall 212. The first clamping unit 60 is supported by the mounting plate 41 and is provided on the upper surface of the bottom wall 212. As a result, the first clamping unit 60 is not directly fixed to the bottom wall 212, but is supported by the mounting plate 41 that is detachable from the bottom wall 212. As a result, the clamping unit 30 including the mounting plate 41 is integrated, so the clamping unit 30 can be attached to various storage boxes 21 that have insertion holes 25. Therefore, the control panel 20 can suppress deterioration of the first clamping unit 60 and the second clamping unit 70 in various storage boxes 21. Furthermore, because the mounting plate 41 covers the first clamping unit 60 from below, dust and cleaning liquid are even less likely to adhere to the first clamping unit 60 and the second clamping unit 70. Therefore, the control panel 20 can further suppress deterioration of the first clamping unit 60 and the second clamping unit 70.

[0046] In the control panel 20, the mounting plate 41 is provided with a mounting hole 49 that communicates with the insertion hole 25 while being fixed to the bottom wall 212. In the cover 50, the box body 51 is box-shaped and opens forward. The cover 50 is detachable from the mounting plate 41. Here, when the first clamping portion 60 and the second clamping portion 70 clamp the electric wire W, a reaction force from the electric wire W may cause the second clamping portion 70 to move away from the first clamping portion 60, thereby releasing the clamping of the electric wire W. In the control panel 20, the cover 50 is box-shaped, and the mounting plate 41 presses the first clamping portion 60 with its entire upper surface. The lid wall 511 presses the second clamping portion 70 with its entire lower surface. Therefore, when the cover 50 is attached to the mounting plate 41, the second clamping portion 70 presses the first clamping portion 60 evenly. Therefore, the control panel 20 can stably clamp the electric wire W between the first clamping portion 60 and the second clamping portion 70.

[0047] The control panel 20 has an elastic seal member 42 that is provided on the mounting plate 41. When the cover 50 is attached to the mounting plate 41, the seal member 42 comes into contact with the joint wall 52 of the cover 50. With this, the seal member 42 is interposed between the mounting plate 41 and the cover 50, so that dust and cleaning liquid are less likely to enter the inside of the storage box 21 through the gap between the mounting plate 41 and the cover 50. Therefore, the control panel 20 can prevent dust and cleaning liquid from entering the inside of the storage box 21.

[0048] The control panel 20 has an extension wall 46. The extension wall 46 is located forward of the first clamping portion 60. The extension wall 46 is provided with a plurality of fixing holes 460 that penetrate the extension wall 46 in the up-down direction. The electric wires W arranged inside the box body 51 of the cover 50 are fixed to the extension wall 46 with cable ties (not shown) that are inserted through the fixing holes 460. As a result, the electric wires W arranged inside the cover 50 are fixed via the fixing holes 460, and therefore the control panel 20 can stably clamp the electric wires W between the first clamping portion 60 and the second clamping portion 70.

[0049] The present invention further provides the following advantages. Because the first clamping portion 60 and the second clamping portion 70 extend in the left-right and front-rear directions, just like the bottom wall 212, the overall size of the clamping unit 30 can be prevented from increasing even if the first clamping portion 60, the second clamping portion 70, and the bottom wall 212 are arranged vertically. Furthermore, when the first clamping portion 60 and the second clamping portion 70 clamp multiple electric wires W, a gap may be formed between the first clamping portion 60 and the second clamping portion 70 depending on the arrangement of the electric wires W. In the control panel 20, because the first clamping portion 60 and the second clamping portion 70 are housed in the box body 51, even when multiple electric wires W are inserted through the insertion hole 25, dust and cleaning liquid can be prevented from entering the storage box 21 regardless of the arrangement of the multiple electric wires W.

[0050] The present invention can be modified in various ways from the above-described embodiment. The various modifications described below can be combined with each other as long as no contradiction occurs.

[0051] In the above embodiment, the insertion hole 25 is provided in the bottom wall 212. However, the insertion hole 25 may be provided in any wall of the storage box 21, not limited to the bottom wall 212. In a modified example shown in FIGS. 12 and 13, an insertion hole 250 through which the electric wire W can be inserted is provided in the left wall 215. In this case, the clamping unit 30 is rotated from the position shown in FIG. 2. The mounting hole 49 communicates with the insertion hole 250, and the electric wire W is inserted through the insertion hole 250 and then the mounting hole 49. The clamping unit 30 clamps the electric wire W inserted through the mounting hole 49 between the first clamping portion 60 and the second clamping portion 70. Because the clamping unit 30 is integrated and can be attached to any wall of the storage box 21, the clamping unit 30 can clamp the electric wire W in various storage boxes 21.

[0052] The configuration of the clamping unit 30 may be changed as appropriate. The first clamping portion 60 may be arranged offset relative to the insertion hole 25 in the direction in which the lower wall 212 extends, and is not limited to being offset forward relative to the insertion hole 25. The first clamping portion 60 may be arranged offset to the right, for example, relative to the insertion hole 25. Furthermore, the amount of offset of the first clamping portion 60 relative to the insertion hole 25 may be changed as appropriate. The first clamping portion 60 may be arranged spaced forward relative to the insertion hole 25, for example. The first clamping portion 60 does not need to be elastic, and the material of the first clamping portion 60 may be changed as appropriate. The shape of the first clamping portion 60 may be changed as appropriate. The first clamping portion 60 may be, for example, a plate-like member extending in the left-right and front-rear directions.

[0053] The cover wall 511 need only extend in the front-rear direction, and is not limited to a rectangular shape that is longer in the left-right direction than in the front-rear direction in a plan view. The cover wall 511 is not limited to being parallel to the bottom wall 212. The cover wall 511 may extend upward and forward from the rear wall 512, for example.

[0054] The second clamping portion 70 may protrude from the cover wall 511 toward the first clamping portion 60, and may extend, for example, rearward and downward from the cover wall 511 toward the first clamping portion 60. In the above embodiment, the lower end of the second clamping portion 70 is located above the joint wall 52, but it may be located below the joint wall 52, or may be located at approximately the same position as the joint wall 52 in the up-down direction. The second clamping portion 70 does not have to be elastic, and the material of the second clamping portion 70 may be changed as appropriate. The shape of the second clamping portion 70 may be changed as appropriate. The second clamping portion 70 may be, for example, plate-shaped extending in the left-right and front-rear directions. The first clamping portion 60 and the second clamping portion 70 do not have to have approximately the same shape. For example, the first clamping portion 60 may have a front elastic portion 61, a rear elastic portion 62, a right elastic portion 63, and a left elastic portion 64 as in the above embodiment, and the second clamping portion 70 may be plate-shaped, extending in the left-right and front-back directions and contacting the front elastic portion 61, the rear elastic portion 62, the right elastic portion 63, and the left elastic portion 64.

[0055] The configuration of the base 40 may be changed as appropriate. The base 40 may not have the mounting plate 41. In this case, the first clamping portion 60 may be attached to the lower wall 212 via an adhesive. The shape of the mounting plate 41 may be changed as appropriate as long as it is detachable from the upper surface of the lower wall 212. The arrangement of the mounting plate 41 may be changed as appropriate. In the above embodiment, the mounting plate 41 covers the insertion hole 25 in a plan view, but the mounting plate 41 does not have to cover the insertion hole 25 in a plan view. In this case, the mounting plate 41 may not have the mounting hole 49.

[0056] The shape of the mounting holes 49 may be changed as appropriate as long as they communicate with the insertion holes 25 when the mounting plate 41 is attached to the lower wall 212. For example, the mounting holes 49 may be formed by cutting the rear end of the mounting plate 41 forward, so that the mounting plate 41 opens in the vertical direction.

[0057] The configuration of the cover 50 may be changed as appropriate. The box body 51 is not limited to being box-shaped. The box body 51 may include a cover wall 511, and the configuration of the box body 51 may be changed as appropriate. The box body 51 may be open in the direction in which the bottom wall 212 extends, and may open to the left, for example. The cover 50 may not have a joint wall 52. The cover 50 is not limited to being detachable from the mounting plate 41, and may be detachable from the bottom wall 212, for example.

[0058] The base 40 may not have the sealing member 42. The shape of the sealing member 42 may be changed as appropriate. The sealing member 42 may not include the front connection portion 421. The arrangement of the opening 429 may be changed as appropriate. The opening 429 may be offset with respect to the insertion hole 25 in a plan view. The opening 429 may be offset with respect to the mounting hole 49 in a plan view. When the cover 50 is attached to the base 40, the sealing member 42 may not be in contact with the cover 50. The sealing member 42 may be in contact with the box body 51. The first clamping portion 60 may be provided on the mounting plate 41 via the sealing member 42.

[0059] The base 40 may not have the extending wall 46. The extending wall 46 is not limited to a rectangular shape that extends more in the left-right direction than in the front-to-rear direction. The shape of the extending wall 46 may be changed as appropriate. For example, the base 40 may have a rectangular shape that is longer in the front-to-rear direction than in the left-to-right direction. The location of the extending wall 46 may be changed as appropriate. The extending wall 46 may be provided, for example, behind the first clamping unit 60. The cover wall 511 is only required to cover the insertion hole 25 and the first clamping unit 60 in a plan view, and may not, for example, cover the extending wall 46 in a plan view. The extending wall 46 may not be provided with the fixing hole 460. The configuration of the fixing hole 460 may be changed as appropriate. The fixing hole 460 may be a hole that penetrates the extending wall 46 in the front-to-rear direction. The electric wire W does not have to be fixed to the extending wall 46 by a cable tie. The electric wire W may be fixed to the extending wall 46 by a clip or the like, for example.

[0060] Other modifications will now be described. The configuration of the machine tool 1 may be modified as appropriate. In the above embodiment, the machine tool 1 is a vertical machine tool in which the spindle 9 extends in the Z-axis direction, but the machine tool 1 may also be a horizontal machine tool in which the spindle 9 extends in the X-axis or Y-axis direction.

[0061] The base 40 does not need to have the base plate 43. In this case, the nuts 44, 451, 452 may be provided on the mounting plate 41. The arrangement of the nuts 44, 451, 452 may be changed as appropriate. For example, the nut 44 may be arranged in a space surrounded by the front elastic portion 61, the rear elastic portion 62, the right elastic portion 63, and the left elastic portion 64 in a plan view. In this case, the through hole 54 may be changed as appropriate depending on the arrangement of the nut 44.

[0062] The clamping unit 30 is an example of a "clamping unit" of the present invention. The control panel 20 is an example of a "control panel" of the present invention. The machine tool 1 is an example of a "machine tool" of the present invention. The front wall 211, the lower wall 212, the upper wall 213, the right wall 214, and the left wall 215 are examples of "wall portions" of the present invention. The electrical component 90 is an example of an "electrical component" of the present invention. The lower wall 212 is an example of a "predetermined wall" of the present invention. The electric wire W is an example of an "electric wire" of the present invention. The insertion hole 25 is an example of an "insertion hole" of the present invention. The upper surface of the lower wall 212 is an example of an "inner surface" of the present invention. The front is an example of an "extension direction" of the present invention. The first clamping portion 60 is an example of a "first clamping portion" of the present invention. The up-down direction is an example of a "crossing direction" of the present invention. The upper side is an example of an "inner direction" of the present invention. The cover wall 511 is an example of a "cover wall" of the present invention. The cover 50 is an example of a "cover" of the present invention. The second clamping portion 70 is an example of the "second clamping portion" of the present invention.

[0063] The mounting plate 41 is an example of a "mounting plate" of the present invention. The mounting hole 49 is an example of a "mounting hole" of the present invention. The sealing member 42 is an example of a "sealing member" of the present invention. The extension wall 46 is an example of an "extension wall" of the present invention. The fixing hole 460 is an example of a "fixing hole" of the present invention. [Explanation of symbols]

[0064] 1 Machine tools 20 Control Panel 21 Storage Box 25 Insertion hole 30 clamping unit 40 base 41 Mounting plate 42 Sealing material 46 Stretch wall 49 Communication hole 50 Cover 60 First clamping part 70 Second clamping part 212 Lower Wall 460 Fixed hole 511 Lid wall

Claims

1. a storage box that stores electrical components that control the machine tool within a space surrounded by a plurality of wall portions; a clamping unit provided in a predetermined wall that is one of the plurality of wall portions, the clamping unit being attachable to a control panel having an insertion hole through which an electric wire electrically connected to the electrical component can be inserted, the clamping unit clamping the electric wire, a first clamping portion fixed to an inner surface of the predetermined wall and disposed offset in an extension direction of the predetermined wall with respect to the insertion hole; a cover including a lid wall extending in the extension direction, spaced apart from the predetermined wall in an inward direction of the storage box among directions intersecting the predetermined wall, and covering the insertion hole and the first clamping portion when viewed from the inward direction; a second clamping portion that protrudes from the cover wall toward the first clamping portion and clamps the electric wire between itself and the first clamping portion. A clamping unit characterized by:

2. A detachable mounting plate is provided on the inner surface, The first clamping portion is provided on the inner surface by being supported by the mounting plate.

2. The clamping unit according to claim 1, wherein:

3. the mounting plate has a mounting hole communicating with the insertion hole when mounted on the inner surface, The cover is box-shaped and opens in the extension direction, and is detachable from the mounting plate.

3. The clamping unit according to claim 2, wherein:

4. 4. The clamping unit according to claim 3, further comprising a seal member provided on the mounting plate, the seal member having elasticity and contacting the cover when the cover is mounted on the mounting plate.

5. an extension wall located further in the extension direction than the first clamping portion, The extension wall is provided with a fixing hole for fixing the electric wire disposed inside the cover.

2. The clamping unit according to claim 1, wherein:

6. A control panel comprising the clamping unit according to any one of claims 1 to 5.

7. A machine tool comprising the clamping unit according to any one of claims 1 to 5.

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