Table device

Abstract

This table device comprises: a base unit; a first linear motion mechanism; a movement unit; a drive unit; a second linear motion mechanism; a third linear motion mechanism; and a table unit. The drive unit includes a screw shaft that extends in a first direction, and a nut that is attached to the screw shaft and that is moved in the first direction by rotation of the screw shaft. The movement unit is provided with a shaft through hole which penetrates from a first surface to a second surface along the first direction, and through which a portion of the screw shaft can pass. A mechanism for rotating the screw shaft can be attached to one end side of the screw shaft. The first surface is disposed on the other end side of the screw shaft positioned on the side opposite the one end side. The nut is attached to the first surface at a position close to the other end of the screw shaft.

Description

Table device 【0001】 The present disclosure relates to a table device. This application claims priority based on Japanese Patent Application No. 2024-209360 filed on December 2, 2024, and incorporates all the descriptions set forth in the above Japanese patent application. 【0002】 There is disclosed a table device including a table movable in a horizontal direction and a lifting direction (see, for example, Patent Document 1 and Patent Document 2). 【0003】 Japanese Patent Application Laid-Open No. 2010-153644 Japanese Patent Application Laid-Open No. 2009-12168 【0004】 In a table device, there may be a case where it is desired to move the table portion in the height direction, that is, in the lifting direction orthogonal to the horizontal direction. Recently, in such a table device, there is a demand for an improvement in maintainability such that assembly and disassembly can be easily performed. 【0005】 Therefore, one of the objectives is to provide a table device capable of improving maintainability. 【0006】A table device according to the present disclosure includes a base portion including a first base surface and a second base surface intersecting the first base surface; a first linear motion mechanism including a first rail attached to the first base surface and extending in a first direction, and a first slider attached to the first rail and movable along the first rail; a moving portion including a first inclined surface inclined in a second direction with respect to the first base surface, a first mounting surface provided at a position opposite to the first base surface, and a first surface and a second surface intersecting the first inclined surface and the first mounting surface, respectively, and moving along the first rail; and the moving portion being a second The device comprises: a drive unit that causes linear reciprocating motion in direction 1; a second linear motion mechanism including a second rail extending along a second direction and a second slider attached to the second rail and movable along the second rail; a table section provided at a position opposite the first inclined surface and including a second inclined surface and a table surface inclined in a second direction, and movable up and down relative to the base section; and a third linear motion mechanism including a third rail extending in a third direction intersecting the first and second directions, and a third slider attached to the third rail and movable along the third rail. The first slider is attached to the first mounting surface. The second slider or second rail is attached to the first inclined surface. The second rail or second slider is attached to the second inclined surface. The table section includes a second mounting surface provided at a position opposite the second base surface. The third rail or third slider is attached to the second base surface. The third slider or third rail is attached to the second mounting surface. The drive unit includes a screw shaft extending in a first direction and a nut attached to the screw shaft that moves in the first direction by the rotation of the screw shaft. The moving unit is provided with a shaft through hole that penetrates from a first surface to a second surface along the first direction, through which a portion of the screw shaft can pass. A mechanism for rotating the screw shaft can be attached to one end of the screw shaft. The first surface is located on the other end of the screw shaft, opposite to the one end. The nut is attached to the first surface near the other end of the screw shaft. 【0007】 The above-described table device allows for improved maintainability. 【0008】Figure 1 is a schematic perspective view showing a table device in Embodiment 1 of the present disclosure. Figure 2 is a schematic plan view of the table device shown in Figure 1. Figure 3 is a schematic front view of the table device shown in Figure 1. Figure 4 is a schematic right side view of the table device shown in Figure 1. Figure 5 is a schematic left side view of the table device shown in Figure 1. Figure 6 is a schematic rear view of the table device shown in Figure 1. Figure 7 is a schematic plan view showing the table device shown in Figure 2 with the lid (described later) removed. Figure 8 is a schematic perspective view showing the table device shown in Figure 1 with the table section and the second linear motion mechanism (described later) removed. Figure 9 is a schematic plan view of the table device shown in Figure 8. Figure 10 is a schematic right side view of the table device shown in Figure 8. Figure 11 is a schematic perspective view of the table device when the table section is raised. Figure 12 is a schematic front view of the table device shown in Figure 11. Figure 13 is a schematic right side view of the table device shown in Figure 11. 【0009】[Summary of Embodiments] The table device of the present disclosure includes a base portion including a first base surface and a second base surface intersecting the first base surface; a first linear motion mechanism including a first rail attached to the first base surface and extending in a first direction, and a first slider attached to the first rail and movable along the first rail; a movable portion including a first inclined surface inclined in a second direction with respect to the first base surface, a first mounting surface provided at a position opposite to the first base surface, and a first surface and a second surface intersecting the first inclined surface and the first mounting surface, respectively, and moving along the first rail; and the movable portion is first The system comprises a drive unit that causes linear reciprocating motion in a direction; a second linear motion mechanism including a second rail extending along a second direction and a second slider attached to the second rail and movable along the second rail; a table section provided at a position opposite the first inclined surface and including a second inclined surface and a table surface inclined in a second direction, and movable up and down relative to the base section; and a third linear motion mechanism including a third rail extending in a third direction intersecting the first and second directions, and a third slider attached to the third rail and movable along the third rail. The first slider is attached to the first mounting surface. The second slider or second rail is attached to the first inclined surface. The second rail or second slider is attached to the second inclined surface. The table section includes a second mounting surface provided at a position opposite the second base surface. The third rail or third slider is attached to the second base surface. The third slider or third rail is attached to the second mounting surface. The drive unit includes a screw shaft extending in a first direction and a nut attached to the screw shaft that moves in the first direction by the rotation of the screw shaft. The moving unit is provided with a shaft through hole that penetrates from a first surface to a second surface along the first direction, through which a portion of the screw shaft can pass. A mechanism for rotating the screw shaft can be attached to one end of the screw shaft. The first surface is located on the other end of the screw shaft, opposite to the one end. The nut is attached to the first surface near the other end of the screw shaft. 【0010】According to the table device of this disclosure, the table section can be raised and lowered in accordance with the linear reciprocating motion of the movable section in a first direction. In this case, the movable section and the table section can be appropriately guided by the first linear motion mechanism, the second linear motion mechanism, and the third linear motion mechanism, thereby enabling smooth raising and lowering motion. With the drive unit configured above, a mechanism for rotating the screw shaft is attached to one end of the screw shaft, and the movable section can be moved by rotating the screw shaft. Therefore, the movement of the movable section using the mechanism for rotating the screw shaft can be controlled with high precision, thereby improving the accuracy of the raising and lowering position when raising and lowering the table section. Here, the nut that moves together with the movable section is attached to the first surface at a position close to the other end of the screw shaft. Therefore, the nut can be easily attached to and removed from the movable section. That is, the nut can be attached and removed without interfering with the mechanism for rotating the screw shaft attached to one end. As a result, the table device described above can improve maintainability. 【0011】 In the table device described above, the base portion may include a flat base plate having a first base surface, and a bracket having a rectangular outer shape when viewed in the thickness direction of the base portion, mounted on the first base surface, and having a second base surface. In this way, the member having the first base surface and the member having the second base surface can be made separate, making it easier to process each member. This can lead to cost reduction. Furthermore, by providing the second base surface on the bracket, the rigidity of the second base surface can be ensured. In addition, the angle of the second base surface intersecting the first base surface can be made more precise. That is, compared to the case where the first and second base surfaces are formed by bending a single plate-shaped member, cutting a square bar, or processing from an extruded material, the second base surface intersecting the first base surface can be made at a more precise angle with greater certainty. Therefore, a table device with a second base surface intersecting the first base surface at a precise angle can be manufactured more easily. Moreover, with this configuration, multiple functions can be given to a single component, such as a bracket, making it easier to reduce the number of component parts. 【0012】 In the table device described above, the bracket may include a third base surface that intersects the first base surface and the second base surface, respectively. The third base surface may be provided with a sensor for detecting the vertical position of the table. By doing so, the sensor can be used to detect whether the table has reached its upper or lower limit in the vertical direction, allowing the table to be moved more safely. 【0013】 In the table device described above, the bracket may be provided with a through hole that penetrates through the base plate in the thickness direction. A coupling that rotatably supports a screw shaft may be placed inside the through hole. By doing so, the bracket can protect the coupling, reducing the risk of damage to the coupling, and the bracket can be made lighter while maintaining high rigidity. Therefore, it becomes easier to realize a more compact table device. 【0014】 In the above-described table device, the drive unit may further include a motor as a mechanism for rotating the screw shaft. The motor may be mounted on a bracket. By doing so, the motor can be stably fixed, and a mechanism for rotating the screw shaft can be realized with a simpler configuration by making the screw shaft and the motor's rotation axis coaxial. 【0015】 In the above-described table device, at least one of the first linear motion mechanism, the second linear motion mechanism, and the third linear motion mechanism may be provided in pairs with a gap between them. By doing so, guidance using at least one of the first linear motion mechanism, the second linear motion mechanism, and the third linear motion mechanism can be performed more stably and accurately. Therefore, the lifting and lowering position of the table can be controlled more precisely. 【0016】 In the above-described table device, the second base surface may be perpendicular to the first base surface. By doing so, the table can be raised and lowered without moving the table itself when viewed from a direction perpendicular to the first base surface. Therefore, the table can be raised and lowered more efficiently. 【0017】 In the above-described table device, the table surface may be parallel to the first base surface. By doing so, when the table device is set up, the first base surface and the table surface are parallel, which improves user convenience during use. 【0018】 In the above-described table device, the movable part may have a wedge shape. By doing so, the configuration of the movable part can be made compact while appropriately providing the first inclined surface to the movable part. Therefore, it becomes easier to make the table device more compact. 【0019】 The bracket for a table device according to this disclosure is rectangular and cylindrical, with a through-hole extending through one of its surfaces. Because such a bracket for a table device has a relatively simple shape, it is easy to process and can reduce manufacturing costs. Furthermore, rectangular cylindrical parts have high rigidity. The bracket for the table device may also have a second base surface. By doing so, it is possible to suppress the tilting of the second base surface compared to the case where the second base surface is provided on a plate-shaped member. In addition, since the angle of the second base surface with respect to the first base surface can be defined with high precision, movement in the direction along the second base surface can be performed with high precision. 【0020】 [Specific Examples of Embodiments] Next, a specific example of an embodiment of the table apparatus of the present disclosure will be described with reference to the drawings. In the following drawings, the same or corresponding parts are given the same reference numerals and their descriptions will not be repeated. 【0021】(Embodiment 1) First, Embodiment 1, which is an embodiment of the present disclosure, will be described. Figure 1 is a schematic perspective view showing the table device in Embodiment 1 of the present disclosure. Note that the cable extending from the motor, which will be described later, is not shown. In Figure 1, the direction indicated by arrow Y is the front-to-back direction (vertical direction), the direction indicated by arrow X is the left-to-right direction (horizontal direction), and the direction indicated by arrow Z is the up-and-down direction (height direction, lifting direction). Arrow Y indicates the direction from the front to the back of the table device, arrow X indicates the direction from the right side to the left side of the table device, and arrow Z indicates the direction from the bottom surface of the table device upwards. In this embodiment, the direction opposite to that of arrow Z is the vertical direction of the table device. The X and Y directions are the horizontal directions. The same applies to the drawings shown below. In this embodiment, the first direction is the direction indicated by arrow Y. 【0022】 Figure 2 is a schematic plan view of the table device shown in Figure 1. Figure 2 is a view of the table device shown in Figure 1 in the direction indicated by arrow II. Figure 3 is a schematic front view of the table device shown in Figure 1. Figure 3 is a view of the table device shown in Figure 1 in the direction indicated by arrow III. Figure 4 is a schematic right side view of the table device shown in Figure 1. Figure 4 is a view of the table device shown in Figure 1 in the direction indicated by arrow IV. Figure 5 is a schematic left side view of the table device shown in Figure 1. Figure 5 is a view of the table device shown in Figure 1 in the direction indicated by arrow V. Figure 6 is a schematic rear view of the table device shown in Figure 1. Figure 6 is a view of the table device shown in Figure 1 in the direction indicated by arrow VI. Figure 7 is a schematic plan view of the table device shown in Figure 2 with the lid (described later) removed. Figure 8 is a schematic perspective view of the table device shown in Figure 1 with the table section and the second linear motion mechanism (described later) removed. Figure 9 is a schematic plan view of the table device shown in Figure 8. Figure 9 is a view of the table device shown in Figure 8, as indicated by arrow IX. Figure 10 is a schematic right side view of the table device shown in Figure 8. Figure 10 is a view of the table device shown in Figure 8, as indicated by arrow X. 【0023】Referring to Figures 1 to 10, the table device 10a in Embodiment 1 of the present disclosure includes a base portion 11a, a pair of first linear motion mechanisms 31a, 31b, a pair of second linear motion mechanisms 34a, 34b, a pair of third linear motion mechanisms 37a, 37b, a moving portion 40a, a drive portion 50a, a table portion 60a, and a pair of sensor portions 70a, 70b. The base portion 11a includes a base plate 12a and a bracket for the table device (hereinafter sometimes simply referred to as "bracket") 13a. 【0024】 The base plate 12a is flat. The base plate 12a is rectangular when viewed in the Z direction, which is the thickness direction of the base plate 12a. The length of the base plate 12a in the Y direction is longer than the length of the base plate 12a in the X direction. The base plate 12a has a first base surface 14a located on one side in the thickness direction of the base plate 12a and a first bottom surface 15a located on the other side in the thickness direction. The base plate 12a also includes a first side surface 16a located on the right side, a second side surface 17a located to the left of the first side surface 16a at a distance in the X direction, a third side surface 18a located on the front side, and a fourth side surface 19a located on the back side at a distance in the Y direction from the third side surface 18a. The first base surface 14a, the first bottom surface 15a, the first side surface 16a, the second side surface 17a, the third side surface 18a, and the fourth side surface 19a are all flat. The first base surface 14a and the first bottom surface 15a are parallel to the X-Y plane, respectively. The first side surface 16a and the second side surface 17a are parallel to the Y-Z plane, respectively. The third side surface 18a and the fourth side surface 19a are parallel to the X-Z plane, respectively. Because the base plate 12a with this configuration has a relatively simple shape, it can be manufactured at low cost. The base plate 12a is provided with multiple through holes that penetrate in the Z direction and multiple recesses that are recessed in the Z direction for attaching each component that is placed on the first base surface 14a. The table device 10a is installed, for example, so that the first bottom surface 15a of the base plate 12a faces downward in the height direction. The base plate 12a is not provided with positioning grooves required for positioning during assembly, which will be described later. 【0025】Bracket 13a is rectangular in shape and has a through hole that penetrates through one of its faces. The external shape of bracket 13a is rectangular when viewed in the thickness direction of the base plate 12a. The length of bracket 13a in the Y direction is longer than the length of bracket in the X direction. Bracket 13a has a through hole 21a that penetrates through the thickness direction of the base plate 12a. Bracket 13a is box-shaped and has a through hole. Bracket 13a is mounted on the first base surface 14a. Bracket 13a is fixed on the first base surface 14a such that the through hole 21a faces in the Z direction. 【0026】 Bracket 13a includes a second base surface 22a, a pair of third base surfaces 23a and 23b, a fourth base surface 24a, a top surface 25a, and a second bottom surface 26a. The second base surface 22a intersects with the first base surface 14a. In this embodiment, the second base surface 22a is perpendicular to the first base surface 14a. The second base surface 22a and the fourth base surface 24a are parallel and spaced apart in the Y direction. The second base surface 22a and the fourth base surface 24a are each parallel to the X-Z plane. The second base surface 22a is flat except for the region where a pair of grooves 27a and 27b, described later, are formed. The fourth base surface 24a is flat. Furthermore, a pair of recessed grooves 27a and 27b are formed on the second base surface 22a, spaced apart in the X direction and recessed in the Y direction. The third rails 38a and 38b, which are included in the pair of third linear motion mechanisms 37a and 37b described later, are attached to these grooves 27a and 27b. 【0027】The second base surface 22a is provided with a circular through-hole 28a that penetrates in the Y direction (see Figure 8 in particular). The fourth base surface 24a is provided with a circular through-hole (not shown) that penetrates in the Y direction. The bracket 13a is positioned on the first base surface 14a such that the fourth base surface 24a, located in the Y direction, is aligned with the fourth side surface 19a of the base plate 12a. The bracket 13a is also positioned so that the second bottom surface 26a faces the first base surface 14a. A cover portion 29a is attached to the bracket 13a by a number of bolts and covers the upper opening of the through-hole 21a in the Z direction. By removing the bolts, the cover portion 29a can be removed and the inside of the through-hole 21a can be viewed. 【0028】 The pair of third base surfaces 23a and 23b are spaced apart in the X direction. The third base surfaces 23a and 23b are each planar. The third base surfaces 23a and 23b intersect the first base surface 14a and the second base surface 22a, respectively. In this embodiment, the third base surfaces 23a and 23b are orthogonal to the first base surface 14a and the second base surface 22a, respectively. That is, the first base surface 14a, the second base surface 22a, and the third base surfaces 23a and 23b are all orthogonal to each other. The third base surfaces 23a and 23b are each parallel to the Y-Z plane. 【0029】 Each pair of first linear motion mechanisms 31a and 31b includes first rails 32a and 32b and first sliders 33a and 33b. The first rails 32a and 32b are each spaced apart in the X direction and extend in the Y direction, which is a first direction. The first rails 32a and 32b are each mounted and fixed on the first base surface 14a. One end of the first rails 32a and 32b in the Y direction is positioned close to the third side surface 18a. The first sliders 33a and 33b are each mounted on the first rails 32a and 32b and are movable along the first rails 32a and 32b. That is, the first sliders 33a and 33b are each capable of linear reciprocating motion in the Y direction, which is a first direction. 【0030】The movable part 40a is block-shaped and has a wedge shape. The movable part 40a is positioned such that the narrow tip of the wedge shape faces in the direction indicated by arrow Y. That is, the movable part 40a is positioned so that the narrow tip faces the bracket 13a. The movable part 40a includes a first mounting surface 41a, a first surface 42a, a second surface 43a, and a first inclined surface 44a. The first mounting surface 41a is provided at a position opposite to the first base surface 14a. The first mounting surface 41a is parallel to the X-Y plane. First sliders 33a and 33b are mounted on the first mounting surface 41a at intervals in the X direction. The movable part 40a moves along the first rails 32a and 32b. In other words, the moving part 40a can perform smooth linear reciprocating motion in the first direction, the Y direction, by the first linear motion mechanisms 31a and 31b. 【0031】 The first surface 42a and the second surface 43a each intersect with the first mounting surface 41a. In this embodiment, the first surface 42a and the second surface 43a each are perpendicular to the first mounting surface 41a. That is, the first surface 42a and the second surface 43a are each surfaces perpendicular to the first direction. The first surface 42a and the second surface 43a are each parallel to the X-Z plane. The first surface 42a is the surface located on the third side surface 18a side of the block-shaped movable part 40a, and the second surface 43a is the surface located on the fourth side surface 19a side. The first inclined surface 44a is inclined in the second direction, W direction, with respect to the first base surface 14a (see Figure 4 in particular). The inclination angle of the first inclined surface 44a, indicated by arrow W, can be any angle between 14.04 degrees and 26.57 degrees with respect to the first mounting surface 41a, for example. The first inclined surface 44a is inclined such that the height (length in the Z direction) of the second surface 43a is lower than the height of the first surface 42a. The first mounting surface 41a, the first surface 42a, the second surface 43a, and the first inclined surface 44a are all flat. The movable part 40a is provided with a shaft through hole 45a that penetrates from the first surface 42a to the second surface 43a. The shaft through hole 45a is configured to extend straight in the Y direction. 【0032】The drive unit 50a causes the moving unit 40a to reciprocate linearly in a first direction. The drive unit 50a includes a screw shaft 51a, a nut 52a, a motor 53a as a mechanism for rotating the screw shaft 51a, and a coupling 56a. The screw shaft 51a is provided to extend in the Y direction, which is the first direction. A screw groove (not shown) is formed on the outer circumferential surface of the screw shaft 51a from one end to the other. The screw shaft 51a is provided to pass through a through hole 28a and a shaft through hole 45a. The nut 52a is attached to the screw shaft 51a. The nut 52a moves in the first direction by the rotation of the screw shaft 51a together with the moving unit 40a, as will be described later. The motor 53a is attached to the bracket 13a. In this embodiment, the motor 53a is attached to the bracket 13a via a replaceable attachment 54a. 【0033】 The table portion 60a includes a first portion 61a and a second portion 62a. The second portion 62a is a portion that extends from a part of the first portion 61a toward the base plate 12a. The second portion 62a is provided at the Y-direction end of the first portion 61a. The table portion 60a includes a table surface 63a, a second inclined surface 64a, a second mounting surface 65a, a third mounting surface 66a, and a fourth mounting surface 67a. For example, an object that moves up and down in the table device 10a can be placed on the table surface 63a. The table surface 63a is flat and has a plurality of holes. The second inclined surface 64a is inclined in the second direction, which is the W direction (see Figure 4 in particular). The second inclined surface 64a is provided at a position opposite to the first inclined surface 44a. In this embodiment, the second inclined surface 64a is parallel to the first inclined surface 44a. The first part 61a includes a table surface 63a, a second inclined surface 64a, a portion of the second mounting surface 65a, a portion of the third mounting surface 66a, and a portion of the fourth mounting surface 67a. The second part 62a includes the remainder of the second mounting surface 65a, the remainder of the third mounting surface 66a, and the remainder of the fourth mounting surface 67a. 【0034】Each pair of second linear motion mechanisms 34a and 34b includes second rails 35a and 35b and second sliders 36a and 36b, respectively. The second rails 35a and 35b are each positioned to extend in the second direction, W, with a gap in the X direction between them. The second rails 35a and 35b are each mounted and fixed on the second inclined surface 64a. The second sliders 36a and 36b are each mounted on the second rails 35a and 35b and are movable along the second rails 35a and 35b. The second sliders 36a and 36b are each mounted on the first inclined surface 44a with a gap in the X direction between them. That is, by moving the movable part 40a in the first direction, the second sliders 36a and 36b are each capable of linear reciprocating motion in the second direction, W. 【0035】 Each pair of third linear motion mechanisms 37a and 37b includes third rails 38a and 38b and third sliders 39a and 39b, respectively. The third rails 38a and 38b each extend in a third direction that intersects the first and second directions, respectively. In this embodiment, the third rails 38a and 38b are arranged to extend in the Z direction with a gap in the X direction. That is, the third direction is the Z direction, which is perpendicular to the first base surface 14a. The third rails 38a and 38b or the third sliders 39a and 39b are mounted on the second base surface 22a. The third sliders 39a and 39b or the third rails 38a and 38b are mounted on the second mounting surface 65a. In this embodiment, the third rails 38a and 38b are each mounted and fixed on the second base surface 22a. Specifically, the third rails 38a and 38b are mounted so as to fit into a pair of grooves 27a and 27b provided on the second base surface 22a. The third sliders 39a and 39b are mounted on the third rails 38a and 38b, respectively, and are movable along the third rails 38a and 38b. The third sliders 39a and 39b are mounted on the second mounting surface 65a with a gap between them in the X direction. That is, as the table section 60a moves in the Z direction (up and down direction), the third sliders 39a and 39b are each capable of linear reciprocating motion in the Z direction. 【0036】Sensor section 70a includes a first detection section 71a, a second detection section 72a, and a first plate-shaped section 73a. Sensor section 70b includes a third detection section 71b, a fourth detection section 72b, and a second plate-shaped section 73b (see Figures 4 and 5 in particular). The first detection section 71a and the second detection section 72a are mounted on the third base surface 23a. In the Z direction, the mounting position of the second detection section 72a is closer to the base plate 12a than the mounting position of the first detection section 71a. The first plate-shaped section 73a is mounted on the third mounting surface 66a. The first plate-shaped section 73a has a pair of first protrusions 74a and 75a that are spaced apart in the Z direction and protrude in the direction indicated by arrow Y, and a first recess 76a that is positioned between the pair of first protrusions 74a and 75a in the Z direction. The third detection unit 71b and the fourth detection unit 72b are attached to the third base surface 23b. In the Z direction, the mounting position of the fourth detection unit 72b is closer to the base plate 12a than the mounting position of the third detection unit 71b. The second plate-like portion 73b is attached to the fourth mounting surface 67a. The second plate-like portion 73b includes a second projection 75b and a second recess 76b. In the Z direction, the position where the second projection 75b is provided is closer to the base plate 12a than the position where the second recess 76b is provided. It is also possible to attach the first detection unit 71a and the second detection unit 72a to the third base surface 23b, and the third detection unit 71b and the fourth detection unit 72b to the third base surface 23a. 【0037】 The first detection unit 71a, the second detection unit 72a, the third detection unit 71b, and the fourth detection unit 72b are, for example, proximity sensors. The detection mechanism in the first detection unit 71a and the second detection unit 72a is as follows. The first plate-shaped part 73a moves in the vertical direction together with the table part 60a. As the first plate-shaped part 73a moves, the high-frequency magnetic field emitted from the first detection unit 71a and the second detection unit 72a changes as the first protrusions 74a, 75a and the first recess 76a provided on the first plate-shaped part 73a pass through the first detection unit 71a and the second detection unit 72a. The first detection unit 71a is a pre-origin sensor, and the second detection unit 72a is an origin sensor. By reading this change, the first detection unit 71a and the second detection unit 72a detect whether or not the table part 60a is located at the origin in the vertical direction. 【0038】 The detection mechanisms in the third detection unit 71b and the fourth detection unit 72b are as follows. The second plate-shaped portion 73b moves in the vertical direction together with the table portion 60a. As the second plate-shaped portion 73b moves, the high-frequency magnetic field emitted from the third detection unit 71b and the fourth detection unit 72b changes as the second protrusion 75b and the second recess 76b provided on the second plate-shaped portion 73b pass through the third detection unit 71b and the fourth detection unit 72b. By reading this change, the third detection unit 71b and the fourth detection unit 72b detect whether the table portion 60a has reached its upper limit or lower limit in the vertical direction. 【0039】 Next, an example of how to assemble the table device 10a with the above configuration will be described. First, prepare the base plate 12a with the above configuration, and attach each component, namely the pair of first linear motion mechanisms 31a, 31b, the bracket 13a, etc., to the first base surface 14a of the base plate 12a. Note that the first detection unit 71a, the second detection unit 72a, the third detection unit 71b, the fourth detection unit 72b, and the motor 53a, etc., may be attached to the bracket 13a. Then, attach the moving part 40a to the first linear motion mechanisms 31a, 31b, pass the screw shaft 51a through the shaft hole 45a, and attach the nut 52a to the first surface 42a. After that, attach the second linear motion mechanisms 34a, 34b. Also, attach the third linear motion mechanisms 37a, 37b to the second base surface 22a of the bracket 13a. Subsequently, the second linear motion mechanisms 34a and 34b and the table section 60a are attached, and each component is fixed in place while adjusting so that the table section 60a operates smoothly and accurately. In this way, the table device 10a is assembled. 【0040】 Next, the operation of the table device 10a with the above configuration will be described. Figure 11 is a schematic perspective view of the table device 10a when the table section 60a is raised. Figure 12 is a schematic front view of the table device 10a shown in Figure 11. Figure 12 is a view of the table device 10a shown in Figure 11 in the direction indicated by arrow XII. Figure 13 is a schematic right side view of the table device 10a shown in Figure 11. Figure 13 is a view of the table device 10a shown in Figure 11 in the direction indicated by arrow XIII. 【0041】 Referring to Figures 11 to 13, the motor 53a rotates the screw shaft 51a, for example, in the forward direction. As a result, since the nut 52a attached to the screw shaft 51a is fixed to the first surface 42a of the movable part 40a, the movable part 40a is guided by the pair of first linear motion mechanisms 31a and 31b and moves in the direction indicated by arrow Y. Since the second sliders 36a and 36b of the second linear motion mechanisms 34a and 34b are attached to the first inclined surface 44a of the movable part 40a, the second sliders 36a and 36b move in the opposite direction to the direction indicated by arrow W. Since the second rails 35a and 35b of the second linear motion mechanisms 34a and 34b are attached to the second inclined surface 64a of the table part 60a, the table part 60a is lifted and rises in the direction indicated by arrow Z. At this time, the movement of the table portion 60a in the direction indicated by arrow Z is appropriately guided by the third linear motion mechanism 37a, 37b, which includes the third rails 38a, 38b attached to the second base surface 22a of the bracket 13a and the third sliders 39a, 39b attached to the second mounting surface 65a of the table portion 60a. Furthermore, the position of the table portion 60a in the Z direction is accurately detected by the first detection unit 71a, the second detection unit 72a, the first plate-shaped unit 73a, the third detection unit 71b, the fourth detection unit 72b, and the second plate-shaped unit 73b. 【0042】As described above, with the table device 10a, the table section 60a can be raised and lowered in accordance with the linear reciprocating motion of the moving section 40a in the first direction. In this case, the moving section 40a and the table section 60a can be appropriately guided by the first linear motion mechanisms 31a, 31b, the second linear motion mechanisms 34a, 34b, and the third linear motion mechanisms 37a, 37b, thus enabling smooth raising and lowering motion. With the drive unit 50a configured above, a motor 53a, which serves as a mechanism for rotating the screw shaft 51a, is attached to one end of the screw shaft 51a, and the moving section 40a can be moved by rotating the screw shaft 51a. Therefore, the movement of the moving section 40a using the motor 53a can be controlled with high precision, and the accuracy of the raising and lowering position when raising and lowering the table section 60a can be improved. Here, the nut 52a that moves together with the moving section 40a is attached to the first surface 42a at a position close to the other end of the screw shaft 51a. Therefore, the nut 52a can be easily attached to the movable part 40a and removed from the movable part 40a. In other words, the nut 52a can be attached and detached without interfering with the motor 53a attached to one end. As described above, the table device 10a improves maintainability. 【0043】In this embodiment, the base portion 11a includes a flat base plate 12a having a first base surface 14a, and a bracket 13a having a rectangular outer shape when viewed in the thickness direction of the base plate 12a, mounted on the first base surface 14a, and having a second base surface 22a. In this way, the member having the first base surface 14a and the member having the second base surface 22a are made separate, making it easier to process each member. This reduces costs. Furthermore, by providing the second base surface 22a on the bracket 13a, the rigidity of the second base surface 22a can be ensured. In addition, the angle of the second base surface 22a intersecting the first base surface 14a can be made more precise. That is, compared to the case where the first base surface 14a and the second base surface 22a are formed by bending a single plate-shaped member, cutting a square timber, or processing from an extruded material, the angle of the second base surface 22a intersecting the first base surface 14a can be made more reliably precise. Therefore, the table device 10a, in which the second base surface 22a intersecting the first base surface 14a is set to a precise angle, can be manufactured more easily. Furthermore, with this configuration, multiple functions can be given to a single component, the bracket 13a, making it easier to reduce the number of component parts. 【0044】In this embodiment, the bracket 13a includes third base surfaces 23a and 23b that intersect the first base surface 14a and the second base surface 22a, respectively. Sensor units 70a and 70b for detecting the lifting position of the table unit 60a are provided on the third base surfaces 23a and 23b. Therefore, it is possible to detect whether the table unit 60a has reached the upper limit or the lower limit in the lifting direction by using the sensor units 70a and 70b, and the table unit 60a can be moved more safely. As a method for detecting the lifting position of the table unit 60a with higher accuracy, a linear scale and a detection head for reading the scale of the linear scale may be used. Regarding the detection of the lifting position of the table unit 60a, it is assumed that the lifting direction of the table unit 60a, that is, the moving direction of the table unit 60a, is directly measured, and a linear scale or a detection head is attached to the first base surface 14a, and a detection head or a linear scale is attached to the table unit 60a to detect the lifting position of the table unit 60a. 【0045】 In this embodiment, the bracket 13a is provided with a through hole 21a that penetrates in the thickness direction of the base plate 12a. A coupling 56a that rotatably supports the screw shaft 51a is arranged in the through hole 21a. Therefore, the coupling 56a can be protected by the bracket 13a to reduce the risk of damage to the coupling 56a, and weight reduction can be achieved while maintaining the high rigidity of the bracket 13a. Therefore, it becomes easier to realize a more compact table device 10a. 【0046】 In this embodiment, the drive unit 50a includes a motor 53a as a mechanism for rotating the screw shaft 51a. The motor 53a is attached to the bracket 13a. Therefore, the motor 53a can be stably fixed, and a mechanism for rotating the screw shaft 51a with a simpler configuration by making the screw shaft 51a and the rotation axis of the motor 53a coaxial can be realized. In this embodiment, the motor 53a is attached to the bracket 13a via an attachment 54a, but by replacing the attachment 54a, other types of motors 53a can be attached. 【0047】 In this embodiment, the first linear motion mechanisms 31a and 31b, the second linear motion mechanisms 34a and 34b, and the third linear motion mechanisms 37a and 37b are each provided in a pair with an interval therebetween. Therefore, the guiding using each of the first linear motion mechanisms 31a and 31b, the second linear motion mechanisms 34a and 34b, and the third linear motion mechanisms 37a and 37b can be performed more stably and accurately. Accordingly, more precise control of the lifting position of the table portion 60a can be performed. 【0048】 In this embodiment, the second base surface 22a is orthogonal to the first base surface 14a. Therefore, the table portion 60a can be lifted and lowered without moving the table portion 60a when viewed from a direction perpendicular to the first base surface 14a. Accordingly, the table portion 60a can be lifted and lowered more efficiently. 【0049】 In this embodiment, the table surface 63a is parallel to the first base surface 14a. Therefore, when the table device 10a is set, since the first base surface 14a and the table surface 63a are parallel, the convenience of the user during use can be improved. 【0050】 In this embodiment, the moving portion 40a has a wedge shape. Therefore, while making the configuration of the moving portion 40a compact, the first inclined surface 44a can be appropriately provided on the moving portion 40a. Accordingly, it becomes easy to make the table device 10a compact. 【0051】 The bracket 13a for the table device of the present disclosure is in a square tube shape, and a through hole 28a penetrating one surface is provided. Since such a bracket 13a for the table device has a relatively simple shape, it is easy to process and the manufacturing cost can be reduced. 【0052】 (Other embodiments) In the above embodiment, the second base surface 22a is orthogonal to the first base surface 14a, but the present invention is not limited to this. For example, the second base surface 22a may intersect the first base surface 14a at an angle of 60 degrees or 30 degrees. 【0053】In the above embodiment, the first linear motion mechanisms 31a, 31b, the second linear motion mechanisms 34a, 34b, and the third linear motion mechanisms 37a, 37b are each provided in pairs with a gap between them. However, this is not limited to this configuration, and at least one of them may not be provided in pairs and may consist of a single linear motion mechanism. Furthermore, two of the first linear motion mechanisms 31a, 31b, the second linear motion mechanisms 34a, 34b, and the third linear motion mechanisms 37a, 37b may not be provided in pairs and may each consist of a single linear motion mechanism. 【0054】 Furthermore, in the above embodiment, the second linear motion mechanism is configured such that the second rail is attached to the second inclined surface and the second slider is attached to the first inclined surface. However, the invention is not limited to this configuration, and the second rail may be attached to the first inclined surface and the second slider may be attached to the second inclined surface. In other words, the first inclined surface may have either the second slider or the second rail attached, and the second inclined surface may have either the second rail or the second slider attached. 【0055】 In the above embodiment, the third rail of the third linear motion mechanism is attached to the second base surface and the third slider is attached to the second mounting surface. However, the invention is not limited to this configuration, and the third rail may be attached to the second mounting surface and the third slider may be attached to the second base surface. That is, either the third rail or the third slider may be attached to the second base surface. Either the third slider or the third rail may be attached to the second mounting surface. 【0056】 Furthermore, in the above embodiment, an L-shaped bracket or an I-shaped bracket capable of mounting a scale in the Z direction on the third or fourth mounting surface may be used, and a detection head capable of detecting the position of this scale may be installed on the first or second side surface. By doing so, even more precise height detection can be performed by full closed-loop control. Therefore, such a system may be constructed. 【0057】The embodiments disclosed herein should be understood to be illustrative in all respects and not restrictive in any way. The scope of the invention is defined by the claims and all modifications within the meaning and scope of the claims are intended to be equivalent. 【0058】 10a Table device, 11a Base part, 12a Base plate, 13a Bracket (bracket for table device), 14a First base surface, 15a First bottom surface, 16a First side surface, 17a Second side surface, 18a Third side surface, 19a Fourth side surface, 21a, 28a Through holes, 22a Second base surface, 23a, 23b Third base surface, 24a Fourth base surface, 25a Top surface, 26a Second bottom surface, 27a, 27b Grooves, 29a Cover part, 31a, 31b First linear motion mechanism, 32a, 32b First rail, 33a, 33b First slider, 34a, 34b Second linear motion mechanism, 35a, 35b Second rail, 36a, 36b Second slider, 37a, 37b Third linear motion mechanism, 38a, 38b Third rail, 39a, 39b Third slider, 40a Moving part, 41a First mounting surface, 42a First surface, 43a Second surface, 44a First inclined surface, 45a Shaft through hole, 50a Drive unit, 51a Screw shaft, 52a Nut, 53a Motor, 54a Attachment, 56a Coupling, 60a Table section, 61a First part, 62a Second part, 63a Table surface, 64a Second inclined surface, 65a Second mounting surface, 66a Third mounting surface, 67a Fourth mounting surface, 70a, 70b Sensor section, 71a First detection part, 71b Third detection part, 72a Second detection part, 72b Fourth detection part, 73a First plate-shaped part, 73b Second plate-shaped part, 74a, 75a First protrusion, 75b Second protrusion, 76a First recess, 76b. Second recess.

Claims

1. A base portion including a first base surface and a second base surface intersecting the first base surface; a first linear motion mechanism including a first rail attached to the first base surface and extending in a first direction, and a first slider attached to the first rail and movable along the first rail; a moving portion including a first inclined surface inclined in a second direction with respect to the first base surface, a first mounting surface provided at a position opposite to the first base surface, and a first surface and a second surface intersecting the first inclined surface and the first mounting surface, respectively, and moving along the first rail; a drive unit that causes the moving portion to reciprocate linearly in the first direction; a second linear motion mechanism including a second rail extending in a second direction and a second slider attached to the second rail and movable along the second rail; a table portion provided at a position opposite to the first inclined surface and including a second inclined surface inclined in a second direction and a table surface, and being vertically movable relative to the base portion. The device comprises a third linear motion mechanism including a third rail extending in a third direction intersecting the first and second directions, and a third slider attached to the third rail and movable along the third rail, wherein the first slider is attached to the first mounting surface, the second slider or the second rail is attached to the first inclined surface, the second rail or the second slider is attached to the second inclined surface, the table portion includes a second mounting surface provided at a position opposite to the second base surface, the third rail or the third slider is attached to the second base surface, the third slider or the third rail is attached to the second mounting surface, the drive unit includes a screw shaft extending in the first direction, and a nut attached to the screw shaft that moves in the first direction by rotation of the screw shaft, the moving part is provided with a shaft through hole that penetrates from the first surface to the second surface along the first direction and through which a part of the screw shaft can pass, A mechanism for rotating the screw shaft can be attached to one end of the screw shaft, and the first surface is located on the other end of the screw shaft, opposite to the one end.The nut is attached to the first surface at a position close to the other end of the screw shaft in the table device.

2. The table device according to claim 1, wherein the base portion includes a flat base plate having a first base surface, and a bracket having a rectangular outer shape when viewed in the thickness direction of the base plate, mounted on the first base surface, and having a second base surface.

3. The table device according to claim 2, wherein the bracket includes a third base surface that intersects the first base surface and the second base surface, and the third base surface is provided with a sensor for detecting the raising and lowering position of the table portion.

4. The table device according to claim 2, wherein the bracket is provided with a through hole that penetrates through the base plate in the thickness direction, and a coupling that rotatably supports the screw shaft is disposed within the through hole.

5. The table device according to claim 2, wherein the drive unit further includes a motor as a mechanism for rotating the screw shaft, and the motor is attached to the bracket.

6. The table device according to claim 1 or 2, wherein at least one of the first linear motion mechanism, the second linear motion mechanism, and the third linear motion mechanism is provided in pairs at intervals.

7. The table apparatus according to claim 1 or claim 2, wherein the second base surface is perpendicular to the first base surface.

8. The table apparatus according to claim 1 or claim 2, wherein the table surface is parallel to the first base surface.

9. The table device according to claim 1 or claim 2, wherein the movable part has a wedge shape.

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