JP4350564B2 - Equipment support device - Google Patents

Description

  The present invention relates to a device support device in which a device-side support to which a device is attached is supported by a rotatable arm, and the device can be moved in an arbitrary direction by rotating the arm.

  In recent years, thin liquid crystal displays, plasma displays, and the like are becoming widespread mainly as displays for personal computers and televisions. Since such a liquid crystal display is thinner than conventional mainstream CRTs and the like, it is convenient without occupying a large space even when it is used on a desk in an office or home, for example.

  In order to use such a liquid crystal display effectively, there is one that is designed to stably move the display to an arbitrary height position by an articulated arm device such as that used in lighting fixtures, etc. As this type of device support device, there is a device support device in which a device support body to which a device such as a display is attached is pivotally supported at the tip of an arm so as to be rotatable in a horizontal direction, and the direction of the device is rotated in an arbitrary direction. It has been developed, and the applicant has already filed a patent application (see, for example, Patent Document 1).

JP 2003-113916 A (page 4, FIGS. 1, 4)

  In the device support device using this type of arm device, when it is desired to improve the convenience so that the device supported by the device-side support at the tip of the arm can be used from any direction, It is necessary to be able to change the direction all around. However, when the orientation of the device is changed, if the device-side support is rotated in the same direction many times, a cord or the like wired to the device may be entangled with the arm.

  The present invention has been made paying attention to such a problem, and can change the direction of the device attached to the device-side support at the tip of the arm at least one rotation, but does not perform two or more rotations. An object of the present invention is to provide a device support device that can be stopped reliably.

In order to solve the above-described problem, in the device support apparatus according to claim 1 of the present invention, the fixed-side support and the device-side support are connected by an arm body, and the device-side support is centered on the arm body. A device support device rotatably supported, wherein the arm body includes a bearing portion having an inner peripheral portion having a circular cross section, and a shaft portion having an outer peripheral portion fitted to the inner peripheral portion, Engaging protrusions projecting inwardly from the inner peripheral portion are rotatable around the outer groove formed on the outer peripheral portion of the shaft portion, and the bottom surface of the outer groove has a predetermined circumferential angle. groove Te is formed, the locking member in the groove is slidably fitted, and the engaging head the locking member abuts with the engaging projections to lock the inner groove inwardly arrow And an inward end portion formed in a shape .
According to this feature, the device-side support connected to the arm body is supported so as to be rotatable around the entire circumference, and is provided on the shaft portion movable within the inner groove formed over a predetermined circumferential angle. Since the locking member comes into contact with the engagement protrusion of the bearing portion, after the device-side support is rotated one or more times, the device-side support is rotated by an amount that allows the locking member to move. Can be stopped. Also, the main part of the arm body is composed of two members, a bearing part and a shaft part, and the parts are simplified, and the inner end of the locking member is formed in an arrow shape that locks from the inside of the inner groove. Thus, the locking member can be prevented from being removed from the inner groove, and the operation can be stabilized.

The device support device according to claim 2 of the present invention is the device support device according to claim 1, wherein the movement of the locking member is restricted at both ends of the inner groove. .
According to this feature, since the end portion of the inner groove is used as a movement restricting portion of the locking member, there is no need to newly provide a stopping means for the locking member.

A device support device according to a third aspect of the present invention is the device support device according to the first or second aspect, wherein the arm body has a substantially cylindrical shape, and a fixed side support body is provided inside the arm body. It is characterized by the cord that leads to the device being inserted.
According to this feature, when the device-side support is rotated to change the direction of the device, the amount of rotation of the device is limited, so that the cord reaching the device is not entangled with the arm body.

A device support device according to a fourth aspect of the present invention is the device support device according to any one of the first to third aspects, wherein the axial direction of the arm body is substantially vertical, and the fixed-side support body is It is connected to a fixed body via a parallel link, and the parallel link is rotatable about a vertical axis with respect to the fixed body.
According to this feature, since the fixed support is connected to the parallel link, the device can be moved up and down while maintaining the orientation of the device, and the orientation of the device can be changed over a wide range in the horizontal direction.

A device support apparatus according to a fifth aspect of the present invention is the device support apparatus according to any one of the first to fourth aspects, wherein the predetermined circumferential angle is approximately 50 degrees.
According to this feature, the amount of rotation of the device with respect to the arm body can be defined within a range slightly exceeding 400 degrees, and the rotation of one rotation or more is reliably compensated.

  Examples of the present invention will be described below.

  DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to the drawings. First, FIG. 1 is a perspective view showing an overall image of a parallel link device support apparatus in an embodiment of the present invention. Reference numeral 1 in FIG. 1 denotes a parallel link type device support device to which the present invention is applied. This parallel link type device support device 1 is fixed in this embodiment via a holder 3 that can hold an end of a desk 2. It is fixed to a desk 2 as a body, and a liquid crystal display 4 as a device in this embodiment is attached to the tip.

  As shown in FIG. 1, the parallel link type device support device 1 includes a base body 11 erected on a holder 3 connected to a lower arm 6 by a joint portion 7, and an upper arm 5 and a lower arm 6. Are connected by a joint portion 8, and an attachment arm 12 as an arm body in this embodiment is connected by a joint portion 9 to the tip of the upper arm 5, and a joint is attached to the tip of the attachment arm 12. The liquid crystal display 4 is attached via the unit 10 (see FIG. 2).

  The joints 7, 8, 9, 10 to which the arms 5, 6, 12 are connected can be rotated by a predetermined angle around an axis perpendicular to the paper surface, and the user moves the liquid crystal display 4 up and down. The plurality of joints 7, 8, 9, 10 are rotated and the base body 11 of the lower arm 6 is moved horizontally with respect to the vertical shaft 14 of the holder 3. The liquid crystal display 4 can be supported by moving the liquid crystal display 4 to an arbitrary position on the desk 2.

  FIG. 2 is a side view showing the internal structure of the parallel link device support apparatus 1, and hereinafter, the right side of FIG. A substantially horizontal upper arm 5 is connected to the upper end of the lower arm 6 extending in the vertical direction via a joint portion 8, and the outer sides of the arms 5 and 6 are covered with cover bodies 15 and 16. .

  As shown in FIG. 2, two bar-shaped links 19, 20 extending in the vertical direction are arranged in parallel inside the cover body 16 of the lower arm 6 erected vertically. The joint plate 18 is arranged. The upper ends of the links 19, 20 of the lower arm 6 are pivotally attached to the rotation shafts 25, 26 provided on the joint plate 18, and the lower ends of the links 19, 20 are the rotations provided on the base body 11. Each is pivotally attached to the moving shafts 27 and 28.

  A tension spring 21 made of a coil spring or the like is disposed between the two links 19 and 20 of the lower arm 6, and the upper and lower ends of the tension spring 21 are arranged at the upper part of the link 19 disposed in the front, It is hooked on the lower part of the link 20 arranged at the rear. Since the tension spring 21 is disposed between the two links 19 and 20, the lower arm 6 is biased so as not to tilt forward.

  Similarly to the lower arm 6 described above, two bar-like links 22 and 23 extending in the front-rear direction are arranged in parallel inside the cover body 15 of the upper arm 5 that is horizontal. The joint base 34 is disposed as a fixed side support in the present embodiment. The front ends of the links 22 and 23 of the upper arm 5 are pivotally attached to rotating shafts 36 and 37 provided on the joint base 34, respectively, and the rear ends of the links 22 and 23 are provided on the joint plate 18. The pivot shafts 25 and 35 are pivotally attached.

  A tension spring 24 is disposed between the two links 22 and 23 of the upper arm 5 shown in FIG. 2, and the front and rear ends of the tension spring 24 are located above the front portion of the link 23 disposed below and above. It is hooked on the rear part of the link 22 arranged. Since the tension spring 24 is disposed between the two links 22 and 23, the upper arm 5 is biased so as not to tilt downward.

  Further, using FIG. 2 as an example, the upper arm 5 will be described in detail with respect to the parallel link mechanism. The upper link 22 and the lower link 23 arranged inside the upper arm 5 are respectively connected to the rotation of the joint plate 18. The lines connecting the moving shafts 25 and 35 and the rotating shafts 36 and 37 of the joint base 34 are formed at equal distances, and are connected between the rotating shafts 25 and 35 and the rotating shafts 36 and 37. A parallelogram is formed by the two links 22 and 23.

  The upper end of the tension spring 22 is fixed to the front portion of the upper link 22, and the lower end of the tension spring 22 is fixed to the rear portion of the lower link 23, and the downward force of the upper arm 5 is lowered by the urging force of the tension spring 22. Suppressed.

  That is, when the upper arm 5 shown in FIG. 2 is inclined downward, the relative vertical and longitudinal positions of the two rotary shafts 25 and 35 in the joint plate 18, and the two rotary shafts 36 in the joint base 34, Since the upper link 22 and the lower link 23 are inclined without changing the relative vertical and front / rear positions of 37, the upper arm 5 is hardly inclined downward by the urging force of the tension spring 22.

  Therefore, the load of the mounting arm 12 and the liquid crystal display 4 connected to the front end of the upper arm 5 can be resisted, and the upper arm 5 becomes difficult to tilt downward, and when the liquid crystal display 4 is moved downward. Since the relative vertical and front / rear positions of the two rotation shafts 36 and 37 in the joint base 34 are not changed, the mounting arm 12 is moved downward while maintaining almost vertical without being inclined. .

  Further, as shown in FIG. 2, the liquid crystal display 4 is attached to the tip of the attachment arm 12 via a bracket 13 as a device-side support in the present embodiment provided in the joint portion 10. Are connected so as to be rotatable around an axis perpendicular to the paper surface at a joint 10 formed at the lower part of the mounting arm 12.

  The mounting arm 12 is rotated at a substantially central portion in the vertical direction, and the bracket 13 connected to the joint portion 10 below the mounting arm 12 rotates in the horizontal direction around the mounting arm 12. Supported as possible. Therefore, the screen of the liquid crystal display 4 can be used by changing the orientation so that the user can easily see it.

  Further, as shown in FIG. 2, an electric cable 17 as a cord reaching the device in the present embodiment connected to the liquid crystal display 4 can be arranged inside the cover bodies 15 and 16 of the upper arm 5 and the lower arm 6. The electric cable 17 is attached to the links 20 and 22 by a holder 47. The base body 11 is formed with a notch 48 for hooking the electric cable 17, and the joint base 34 is formed with an insertion hole 49 through which the electric cable 17 can be inserted. The electric cable 17 from the body 11 to the joint base 34 is held.

  The electric cable 17 inserted into the joint base 34 through the insertion hole 49 formed in the joint base 34 is inserted into the mounting arm 12 extending below the joint base 34. The liquid crystal display 4 is connected to the outside through a hole (not shown) formed in the rear part below the mounting arm 12.

  The mounting arm 12 will be described with reference to FIG. 3. FIG. 3 is an exploded side view of the mounting arm 12. Hereinafter, the right side of FIG. The mounting arm 12 is composed of two members, that is, an upper member 50 and a lower member 51 at a substantially central portion in the vertical direction. The upper member 50 extends from the joint base 34 of the joint portion 9, and is a lower member. A joint portion 10 is attached to a lower portion of 51 so that the bracket 13 is pivotally mounted so as to be pivotable in the vertical direction.

  The upper member 50 shown in FIG. 3 can be divided in the left-right direction, and a bearing portion 53 having a circular inner peripheral portion 52 is formed at the lower end of the upper member 50, and the upper end of the lower member 51 is A shaft portion 55 having an outer groove 54 that is substantially circular in a plan view is formed. Three fitting strips 56, 57, 58 are formed around the inner peripheral portion 52 of the bearing portion 53, and two fitting strips 59, 60 are formed around the outer groove 54 of the shaft portion 55. When the mounting arm 12 is assembled, the upper member 50 is formed by fitting the fitting strips 59, 60 of the shaft portion 55 to the fitting strips 56, 57, 58 of the bearing portion 53. And the lower member 51 are connected so as to be rotatable in the horizontal direction.

  An engagement protrusion 61 that protrudes inward is formed on the inner peripheral portion 52 of the bearing portion 53, and this engagement protrusion 61 is formed when the shaft portion 55 is fitted to the bearing portion 53. The shaft portion 55 is arranged at the position of the outer groove 54. As a result, the shaft portion 55 is supported so as to be rotatable around the bearing portion 53. The outer groove 54 of the shaft portion 55 is formed with an inner groove 62 having a circular arc shape in plan view, which is recessed inward from the outer groove 54, and locking members described later are formed at both ends of the inner groove 62. Inner side surfaces 62 a and 62 b are formed as stop portions 63.

  As shown in FIG. 3, a locking member 63 is slidably fitted in the inner groove 62 formed in the outer groove 54 of the shaft portion 55 so as to be slidable in the circumferential direction, and a predetermined range in the circumferential direction. When the shaft portion 55 is fitted to the bearing portion 53, the contact portion 61 comes into contact with the engaging protrusion 61 projecting from the inner peripheral portion 52 of the bearing portion 53 from the circumferential direction. It can be done.

  Further, the mounting arm 12 will be described in detail with reference to FIG. 4. FIG. 4 is a cross-sectional view of the mounting arm 12 in FIG. A bracket 13 is connected to the joint portion 10 formed at the lower part of the lower member 51 via a screwing member 64 composed of a bolt and a nut. The bracket 13 has the screwing member 64 as a central axis. It is designed to rotate.

  Further, the mounting arm 12 has a substantially cylindrical shape, and the electric cable 17 disposed from the joint base 34 is inserted into the mounting arm 12, and the bearing portion 53 and the shaft fitted to each other are inserted. It is inserted in the center of the portion 55. When the electric cable 17 is inserted into the mounting arm 12 to change the horizontal direction of the liquid crystal display 4, the electric cable 17 reaching the liquid crystal display 4 can be connected even if the lower member 51 of the mounting arm 12 is rotated. The attachment arm 12 is not tangled.

  As shown in FIG. 4, the inner groove 62 recessed in the outer groove 54 of the shaft portion 55 is penetrated inward of the shaft portion 55, and the locking member 63 is inserted into the inner groove 62 from the outside. Attached. An inward end portion inserted into the inner groove 62 of the locking member 63 is formed in an arrow shape, and when the inner end portion 62 of the locking member 63 is inserted into the inner groove 62 of the shaft portion 55, Since the inner groove 62 is locked from the inside, the locking member 63 does not come off the inner groove 62.

  Further, the outer side of the locking member 63 is configured as an engaging head 63 a formed in a substantially rectangular shape, and the engaging head 63 a includes the outer groove 54 of the shaft portion 55 and the inner peripheral portion of the bearing portion 53. When the shaft portion 55 is rotated, the engagement head 63 a is brought into contact with the engagement protrusion 61 provided on the bearing portion 53. It is like that.

  Next, the bearing portion 53, the shaft portion 55, and the locking member 63 when the bracket 13 is rotated will be described in detail with reference to FIG. 5. FIG. 5 (a) shows the B− of the mounting arm 12 in FIG. FIGS. 5B and 5C are cross-sectional views of the mounting arm 12 when the bracket 13 is rotated. Hereinafter, the right side of FIG.

  As shown in FIG. 5A, the bearing portion 53 and the shaft portion 55 have a circular shape in plan view, and the inner groove 62 formed in the shaft portion 55 has an arc shape, and the inner groove 62 slides on the inner groove 62. The locking member 63 that is movably engaged can move within a circumferential range (about 50 degrees) in which the inner groove 62 is formed. The engagement protrusion 61 projecting from the inner peripheral portion 52 of the bearing portion 53 can move all around by a space provided between the inner peripheral portion 52 of the bearing portion 53 and the outer groove 54 of the shaft portion 55. ing.

  As shown in FIG. 5B, when the lower member 51 of the mounting arm 12 to which the bracket 13 is connected is rotated counterclockwise in order to change the horizontal direction of the liquid crystal display 4, the lower member 51. The upper end shaft portion 55 is rotated counterclockwise, and the locking member 63 fitted in the inner groove 62 formed in the shaft portion 55 is moved counterclockwise. 63 is brought into contact with the engaging protrusion 61 projecting from the bearing portion 53 from the circumferential direction, and the movement of the locking member 63 is stopped.

  Then, the shaft portion 55 is rotated while the locking member 63 is slid in the inner groove 62. When the shaft portion 55 is rotated by a predetermined angle θ1 (204 °), the locking member 63 is turned into the inner groove. The rotation of the shaft portion 55 is stopped by contact with an inner side surface 62a formed at one end portion of the 62, and the rotation of the lower member 51 to which the bracket 13 is connected is stopped.

  Further, as shown in FIG. 5C, when the lower member 51 is rotated clockwise, the shaft portion 55 of the lower member 51 is rotated clockwise and the inner groove 62 of the shaft portion 55 is formed. When the locking member 63 fitted is moved clockwise, and the locking member 63 comes into contact with the engagement protrusion 61, the movement of the locking member 63 is stopped, and the shaft portion 55 is moved at a predetermined angle. After the rotation by θ2 (204 °), the locking member 63 stopped by the engaging protrusion 61 is brought into contact with the inner side surface 62b formed at one end of the inner groove 62, and the shaft portion 55 rotates. The movement will stop.

  A rotation angle θ1 (204 °) when the lower member 51 of the mounting arm 12 shown in FIG. 5A is rotated counterclockwise, and a rotation angle θ2 (when rotated clockwise) ( 204 [deg.]) And the rotation angle ([theta] 1+ [theta] 2 = 408 [deg.]) Is about 408 [deg.]. To be able to.

  Therefore, even when the horizontal direction of the liquid crystal display 4 facing forward is rotated backward (180 °), the user rotates the liquid crystal display 4 within a range of about 20 ° in the left-right direction. Therefore, the liquid crystal display 4 can be slightly corrected so as to be easy to see. In addition, the rotation angle of the lower member 51 of the mounting arm 12 is restricted within a range of about one rotation and a little (about 408 °), so that the electric cable disposed inside the mounting arm 12 is restricted. 17 is not twisted.

  Although the embodiments of the present invention have been described with reference to the drawings, the specific configuration is not limited to these embodiments, and modifications and additions within the scope of the present invention are included in the present invention. It is.

  For example, in the above embodiment, a bearing portion is formed on the upper member of the mounting arm, a shaft portion is formed on the lower member of the mounting arm, and the bearing portion and the shaft portion are fitted to each other so that the upper member Although the lower member is rotated in the horizontal direction, the present invention is not limited to this, and the shaft is formed on the upper member and the bearing is formed on the lower member. The portion and the bearing portion may be fitted to each other.

  Moreover, in the said Example, while the groove part of planar view circular arc shape by which a latching member is slidably fitted to the outer peripheral part of a shaft part is recessed inward, in the inner peripheral part of a bearing part, Although the engaging protrusion protrudes inward, the present invention is not limited to this, and the groove portion into which the locking member is fitted is recessed outward in the inner peripheral portion of the bearing portion. In addition, the engaging projection may be provided outwardly on the outer peripheral portion of the shaft portion.

  Furthermore, in the above embodiment, the electric cable is arranged inside the cylindrical mounting arm, but the present invention is not limited to this, and the electric cable is arranged outward from the upper arm. Even when connected to a liquid crystal display, since the rotation of the mounting arm is restricted within a range of approximately two rotations or less, the electric cable arranged outside the mounting arm is entangled with the mounting arm. There is nothing wrong.

  And in the said Example, although the groove part of planar view circular arc shape was formed in the outer peripheral part of the axial part of a lower member, and the latching member was slidably fitted by this groove part, this invention is to this. The present invention is not limited, and a spiral groove is formed on the entire outer periphery of the shaft portion, and contact portions on which the locking member is abutted are provided at both ends of the spiral groove, By rotating the lower member several times (two or more rotations), the rotation may be stopped by slidably fitting into the spiral groove.

  And in the said Example, although the fixed side support body demonstrated in the example connected to the base body via the parallel link, this invention is not limited to this, The joint part 9 is made into a fixed side support body. It may be attached directly to a wall or the like.

It is a perspective view which shows the whole image of the parallel link type apparatus support apparatus in the Example of this invention. It is a side view which shows the internal structure of a parallel link type apparatus support apparatus. It is an exploded side view of a mounting arm. It is AA sectional drawing of the attachment arm in FIG. (A) is BB sectional drawing of the attachment arm in FIG. 4, (b) And (c) is sectional drawing of an attachment arm when a bracket is rotated.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Parallel link type apparatus support apparatus 2 Desk 3 Holder 4 Liquid crystal display 5 Upper arm 6 Lower arm 7, 8, 9, 10 Joint part 11 Base body 12 Mounting arm 13 Bracket 14 Vertical shaft 15, 16 Cover body 17 Electric cable 18 Joint Plates 19 and 20 Links 21 Tension springs 22 and 23 Links 24 Tension springs 25 and 26 Rotating shafts 27 and 28 Rotating shafts 34 Joint bases 35, 36, and 37 Rotating shafts 47 Holders 48 Notches 49 Insertion holes 50 Upper members 51 Lower member 52 Inner peripheral part 53 Bearing part 54 Outer groove 55 Shaft parts 56, 57, 58 Fitting line 59, 60 Fitting line 61 Engaging protrusion 62 Inner groove 62a, 62b Inner side surface 63 Locking member 63a Engagement head Part
64 Threaded member

Claims (5)

A stationary support body and an equipment side support body are connected by an arm body, and the equipment side support body is rotatably supported around the arm body, the arm body having a circular cross section A bearing portion having an inner peripheral portion and a shaft portion having an outer peripheral portion fitted to the inner peripheral portion, and an engagement protrusion projecting inward from the inner peripheral portion is formed on the outer peripheral portion of the shaft portion. The entire circumference of the outer groove can be rotated along the formed outer groove. An inner groove is formed on the bottom surface of the outer groove over a predetermined circumferential angle, and a locking member is slidably fitted into the inner groove. , device support, characterized in that said locking member has with the engaging projections abutting the engaging head, and a inner end formed into an arrow shape for engaging the inner groove inwardly apparatus. The apparatus support device according to claim 1, wherein movement of the locking member is restricted at both ends of the inner groove.   The apparatus support device according to claim 1, wherein the arm body is substantially cylindrical, and a cord extending from the stationary support body to the apparatus is inserted into the arm body.   2. The axial direction of the arm body is substantially vertical, the stationary support body is connected to the stationary body via a parallel link, and the parallel link is rotatable about a vertical axis with respect to the stationary body. The apparatus support apparatus in any one of thru | or 3.   The apparatus support apparatus according to claim 1, wherein the predetermined circumferential angle is approximately 50 degrees.

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