JP2015093499A - Height adjustment device, component for height adjustment device, and furniture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate an adjustment of a height of a leg of furniture, and to improve retaining performance of a state after the adjustment.SOLUTION: A height adjustment device includes: a female screw part which is provided on an end of a leg of furniture and has screw threads in the inside; a shaft having a male screw part screwed with the female screw part and a shaft side fitting part which coaxially continues from the male screw part and has a non-circular traverse section; and a rotation knob which covers at least a part of the shaft and is fitted to the shaft side fitting part. The rotation knob has a rotation restriction part which brings at least a part of the end of the leg into contact with at least a part of the rotation knob to generate resistance when the end of the leg and the rotation knob rotate relatively.

Description

  The present invention relates to a height adjusting device, a height adjusting component, and furniture.

  Some furniture such as a desk and a chair is provided with a height adjusting device for adjusting the height of the legs. When there are variations in the heights of the plurality of legs or the floor surface is uneven, the user can change the height of the legs using the height adjusting device to improve the furniture. Moreover, when arranging several furniture side by side, height can also be adjusted between other furniture.

  2. Description of the Related Art Conventionally, there has been proposed a furniture height adjustment device for the purpose of enabling height adjustment with an easy operation (for example, Patent Document 1). In addition, a height adjusting device has been proposed for the purpose of preventing the mounting bolts and the like of the height adjusting device from loosening and maintaining the adjusted state (for example, Patent Document 2).

Japanese Patent No. 5068470 Japanese Patent No. 4805723

  Conventionally, when a locking member for maintaining the adjusted height is fixed with a screw or the like, there has been a problem that the operation for fixing and the operation for adjusting the height again become complicated for the user. It was. On the other hand, when such a locking member is not used, there is a problem that when the user moves the furniture, the shaft of the adjuster rotates, and the height adjusted in advance changes. In particular, if the caster is mounted so that it can rotate about the axis of the adjuster that changes the height of the legs, the adjuster will move when the furniture changes direction (ie, when the caster rotates parallel to the floor). The shaft may loosen.

  In view of the above-described problems, an object of the present invention is to facilitate the height adjustment of the legs of the furniture and to improve the maintenance performance of the state after the adjustment.

  A height adjusting device according to one aspect of the present invention is provided at an end of a leg of furniture, and is connected to a female screw part having a thread inside, a male screw part screwed into the female screw part, and the male screw part on the same axis. A shaft having a shaft-side fitting portion whose cross section is non-circular, and a rotary knob that covers at least a part of the shaft and fits into the shaft-side fitting portion. And a rotation suppressing portion that causes resistance when at least a part of the end of the leg and at least a part of the rotary knob come into contact with each other.

  Since the rotary knob and the shaft are fitted, the user can adjust the depth at which the shaft is inserted into the female threaded portion of the leg by rotating the rotary knob, making it easy to adjust the height of the leg. . On the other hand, since the rotation suppression unit causes resistance to rotation, the leg end portion and the rotation knob are suppressed from rotating relatively. That is, a situation in which the height is changed against the user's intention is reduced, and the maintenance performance of the adjusted state is improved.

Further, the rotation suppressing portion is an unevenness provided on the inner peripheral surface of the rotary knob that is substantially circular in cross-sectional view, and the unevenness provided on the outer peripheral surface of the leg end that is substantially circular in cross-sectional view and the rotation suppressing portion. May be brought into contact with each other to generate resistance. If it does in this way, the unevenness | corrugation of a leg end part and the unevenness | corrugation of a rotary knob will contact, and the maintenance performance of the state after adjustment will improve.

  Further, the rotary knob further covers a protruding portion that protrudes in the outer peripheral direction of the leg cross section, which the leg end has at the edge on the floor surface side, and engages with the protruding portion so as to be an axis in the extraction direction with respect to the leg end. You may make it have a retaining part which controls the movement of this. According to such a retaining portion, it is possible to prevent the shaft from coming off from the leg.

  The height adjustment component according to another aspect of the present invention is provided at the end of the leg of the furniture, and has a male screw part that is screwed into a female screw part having a thread inside, and a cross section that is coaxially connected to the male screw part. Is provided with a shaft having a non-circular shaft-side fitting portion and a rotary knob that covers at least a portion of the shaft and is fitted to the shaft-side fitting portion. A rotation suppressing portion that causes resistance when at least a part of the end of the leg and at least a part of the rotary knob come into contact with each other. In this way, the user can adjust the depth at which the shaft is inserted into the female threaded portion of the leg by rotating the rotary knob in the same manner as the height adjusting device described above. It becomes easy. On the other hand, since the rotation suppression unit causes resistance to rotation, the leg end portion and the rotation knob are suppressed from rotating relatively. That is, a situation in which the height is changed against the user's intention is reduced, and the maintenance performance of the adjusted state is improved.

  Further, the furniture according to another aspect of the present invention includes a leg having a female screw portion having a screw thread inside at the end on the floor surface side, a male screw portion screwed into the female screw portion, and the same male screw portion. A shaft having a shaft-side fitting portion whose cross section is non-circular, and a rotary knob that covers at least a part of the shaft and fits into the shaft-side fitting portion. And a rotation suppressing portion that causes resistance when at least a part of the end of the leg and at least a part of the rotary knob come into contact with each other. In this way, the user can adjust the depth at which the shaft is inserted into the female threaded portion of the leg by rotating the rotary knob in the same manner as the height adjusting device described above. It becomes easy. On the other hand, since the rotation suppression unit causes resistance to rotation, the leg end portion and the rotation knob are suppressed from rotating relatively. That is, a situation in which the height is changed against the user's intention is reduced, and the maintenance performance of the adjusted state is improved.

  In addition, the content of the means for solving the said subject can be combined as much as possible within the range which does not deviate from the subject and technical idea of this invention.

  ADVANTAGE OF THE INVENTION According to this invention, while maintaining the height of the leg of furniture, the maintenance performance of the state after adjustment can be improved.

It is a perspective view which shows an example of the stack table provided with the adjuster which concerns on embodiment. It is a perspective view which shows an example of the edge part of the leg of a table. It is a perspective view which shows an example of the edge part of the leg of a table except a height adjustment knob. It is sectional drawing which shows the state which adjusted the height of the adjuster to the lowest. It is sectional drawing which shows the state which adjusted the height of the adjuster the highest. It is a perspective view which shows a height adjustment axis | shaft typically. It is a perspective view which shows an example of a height adjustment knob. It is a perspective view which shows an example of the connection state of a caster, a height adjustment knob, and a height adjustment axis | shaft. It is sectional drawing which shows the AA cross section of FIG. It is sectional drawing which shows the BB cross section of FIG. It is a perspective view which shows a stack table. It is a right view which shows a stack table. It is a perspective view which shows the stack table of the folded state. It is a rear view which shows the stack table of the folded state. It is a right view which shows the state which accumulated the stack table of the folded state four. FIG. 16 is a perspective cross-sectional view showing a CC cross section of FIG. 15.

  Next, embodiments of the present invention will be described with reference to the drawings. In the following description, a case where the height adjusting device according to the present invention is applied to a leg of a stack table which is an example of furniture will be described as an example. In addition, embodiment described below is the illustration for implementing this invention, and this invention is not limited to the aspect demonstrated below.

<Overall configuration>
FIG. 1 is a perspective view illustrating an example of a stack table including an adjuster according to the embodiment. The stack table 1 in FIG. 1 includes a top plate 2, legs 3, a curtain plate 4, casters 5, and a height adjustment knob 6. FIG. 1 is a perspective view of the stack table 1 as viewed from above the back surface. In the present embodiment, for convenience, the direction in which the curtain plate 4 is attached is referred to as the front or the front.

  The legs 3 are provided near both ends of the top plate 2 in the longitudinal direction and support the top plate 2. In the stack table 1 according to the present embodiment, the top plate 2 is supported substantially horizontally in use, but the top plate 2 can be folded. The curtain plate 4 is connected to the top plate 2 and the legs 3 and is provided substantially vertically in front of the stack table 1. The caster 5 is attached to the end of the leg 3 via a height adjusting shaft (not shown in FIG. 1) described later. The height adjustment knob 6 is fitted to a part of the height adjustment shaft connected between the leg 3 and the caster 5, and the user can rotate the height adjustment knob 6 to rotate the height adjustment shaft 6. The male screw portion (not shown in FIG. 1) can be inserted into the female screw portion (not shown in FIG. 1) of the leg 3. By changing the depth at which the male screw portion of the height adjusting shaft is inserted into the female screw portion of the leg 3, the height of the leg 3 of the stack table 1 can be changed. In addition, the leg 3 is bifurcated from the top plate 2 side to the floor surface side, and a caster 5 is connected to each end. That is, the stack table 1 is in contact with the floor surface with a total of four casters 5. In the present embodiment, the “high” includes the female thread portion provided on the leg 3, the height adjustment shaft (also simply referred to as “axis”), and the height adjustment knob 6 (also referred to as “rotation knob”). "Adjustment device" or "Adjuster".

<Adjuster>
FIG. 2 is a perspective view showing an appearance of a portion including the adjuster according to the present embodiment in the stack table 1. FIG. 2 shows the end of the leg 3, the height adjustment knob 6, and the caster 5. FIG. 3 is a perspective view showing the end of the other leg 3 and the caster 5. That is, FIG. 3 shows a state where the height adjustment knob 6 is removed.

  As shown in FIGS. 2 and 3, the caster 5 includes a cylindrical portion 51 into which a height adjusting shaft connected to the leg 3 is inserted, a wheel 52, and a cover 53 that covers an upper portion of the wheel. Further, at least a part of the casters 5 included in the stack table 1 may have a stopper lever 54 that switches between a locked state and a released state of the rotation of the wheels, as shown in FIG. Various existing techniques can be adopted for the configuration of a stopper (not shown) that restricts the rotation of the wheel.

  Further, the end portion of the leg 3, the height adjustment knob 6 and the cylindrical portion 51 of the caster 5 are connected by a height adjustment shaft 7 existing inside. The height adjusting shaft 7 shown in FIG. 3 has a substantially cylindrical shape and a male screw portion 71 having a thread on the outer peripheral surface, and a shaft-side fitting that is substantially hexagonal in cross section and fits the height adjusting knob 6. It has the joint part 72 and the rotating shaft part 73 which is a substantially cylindrical shape and to which the caster 5 is rotatably mounted.

  Moreover, the internal shape of the end part of the leg 3 is a substantially columnar shape, and the internal thread part which has a thread on the internal peripheral surface is provided. Moreover, as shown in FIG. 3, the leg 3 has the extending | stretching part 31 in which the outer diameter became small in the edge part, and also the outer periphery is a flange shape at the front-end | tip (edge on the floor surface side) of the extending | stretching part 31. And a protruding portion 32 that protrudes from the center. As shown in FIG. 2, when the height of the adjuster is adjusted to be low, the extending portion 31 is covered with the height adjusting knob 6 and cannot be seen from the outside. Moreover, the outer periphery of the extending | stretching part 31 is substantially circular in cross sectional view, but has an unevenness | corrugation. As shown in FIG. 3, a portion where the diameter of the cross section is increased is referred to as a convex portion 33. The convex portion 33 is provided over almost the entire length of the extending portion 31 in the axial direction. The shape of the extending portion 31 will be described in detail later with reference to a cross-sectional view.

  4 and 5 are schematic longitudinal sectional views showing a part of the stack table 1 including the adjuster according to this embodiment. FIG. 4 shows a state where the height of the adjuster is adjusted to the lowest. FIG. 5 shows a state where the height of the adjuster is adjusted to the highest.

  A thread is cut on the outer periphery of the male screw portion 71. Further, a thread is also cut on the inner periphery of the female threaded portion 34 of the leg 3 (that is, a recess provided at the end of the leg 3). The male screw portion 71 and the female screw portion 34 are screwed together, and the height of the adjuster (that is, the height of the adjuster is determined by the depth at which the height adjusting shaft 7 (male screw portion 71) is inserted into the end portion (female screw portion 34) of the leg 3. The height of the leg 3 is changed.

  Moreover, the shaft side fitting part 72 is fitted with the height adjustment knob 6, and the user can change the height of the adjuster by rotating the height adjustment knob 6 in the circumferential direction of the cross section. The height adjustment knob 6 has a leg-side locking claw 61 at the end on the leg 3 side. As shown in FIG. 5, the leg side latching claw 61 is engaged with the protruding portion 32 of the leg 3 to limit the height of the adjuster to a predetermined value or less. That is, the leg side latching claw 61 and the protruding portion 32 function as a retaining portion that prevents the height adjusting shaft 7 from falling off the leg 3 due to the height of the adjuster being excessively high.

  The height adjustment knob 6 has a partition wall 62 that functionally partitions the internal space inside the cylindrical shape and in the middle of the axial direction. The partition wall 62 partitions the inside of the height adjustment knob 6 into a region in which the extending portion 31 on the leg 3 side is accommodated and a region in which the shaft-side fitting portion 72 on the caster 5 side is accommodated. The partition wall 62 has a hole through which the height adjusting shaft 7 can be inserted. Further, the height adjustment knob 6 has a caster side locking claw 63 at an end portion on the caster 5 side. The caster side latching claw 63 engages with the shaft side fitting portion 72 and holds the shaft side fitting portion 72 between the partition wall 62. That is, the side walls of the partition wall 62, the caster side locking claws 63, and the height adjusting knob 6 can form a knob side fitting portion in the inner region, and the shaft side fitting portion 72 can be accommodated therein.

  The caster 5 is mounted so as to be rotatable about the rotation shaft portion 73. Various existing techniques can be adopted for the connection between the caster 5 and the rotary shaft portion 73, and for example, it can be easily rotated via a bearing.

Next, the height adjusting shaft 7 will be described with reference to FIG. FIG. 6 is a perspective view schematically showing the height adjusting shaft 7. As described above, one end of the height adjusting shaft 7 is the male screw portion 71 having a thread on the outer periphery. The other end is a rotating shaft portion 73 connected to the caster 5. Between them, a shaft-side fitting part 72 having a hexagonal cross section is provided on the same axis.

  The outer periphery of the cross section of the shaft side fitting portion 72 is longer than the outer periphery of the cross section of each of the male screw portion 71 and the rotating shaft portion 73. Moreover, the area of the cross section of the shaft side fitting part 72 is larger than the area of the cross section of each of the male screw part 71 and the rotating shaft part 73. In the present embodiment, the shape of the cross section of the shaft side fitting portion 72 is a hexagon, but the shape of the cross section of the shaft side fitting portion according to the present invention is not limited to a hexagon. That is, the shape of the cross section of the shaft side fitting part 72 should just be a shape which can be fitted with the height adjustment knob 6, and various shapes other than a perfect circle can be employ | adopted. The shaft side fitting portion 72 is also referred to as a “non-circular cross-sectional portion”. The shaft-side fitting portion 72 provided in the middle of the height adjustment shaft 7 is formed integrally with the male screw portion 71 and the rotating shaft portion 73.

  Such a shaft side fitting part 72 can be formed by rolling, for example. It may be formed by cutting and grinding, or may be integrally formed by welding a nut-like or flange-like member to a bolt having a substantially constant diameter. With such a configuration, the total number of parts can be suppressed, and the manufacturing cost can be reduced.

  Next, the height adjustment knob 6 will be described with reference to FIGS. FIG. 7 is a perspective view showing an example of the height adjustment knob 6. FIG. 7 is a view of the height adjustment knob 6 as seen from the direction in which it is connected to the casters. FIG. 8 is a perspective view showing an example of the caster 5, the height adjustment knob 6, and the height adjustment shaft 7. FIG. 9 is a cross-sectional view taken along the line AA in FIG. In addition, AA cross section is a cross section which looked at the cross section of the shaft side fitting part 72 toward the leg 3 side from the caster 5 side in the state which connected the leg 3, the height adjustment shaft 7, and the caster 5. . FIG. 8 shows a state where the knob side fitting portion of the height adjustment knob 6 and the shaft side fitting portion 72 of the height adjustment shaft 7 are fitted, and the caster 5 is mounted on the height adjustment shaft 7. .

  Three leg side locking claws 61 are provided on the edge of the inner peripheral surface of the height adjustment knob 6 on the leg 3 side. In addition, on the inner peripheral surface of the height adjustment knob 6, there are provided three inclined portions 66 protruding gradually from the caster 5 side toward the leg 3 side toward the center of the cross section. 66 at the end of the leg 3 side. Moreover, the length which the leg side latching claw 61 protrudes in the center direction of the cross section of the height adjustment knob 6 becomes long as it goes to the caster 5 side from the leg 3 side. Therefore, when the height adjustment knob 6 is connected to the end of the leg 3, the leg-side locking claw 61 can easily get over the protrusion 32, but in the direction of removing the height adjustment knob 6 from the leg 3. Is restricted from moving.

  A partition wall 62 is formed inside the height adjustment knob 6. As shown in FIG. 7, on the caster 5 side of the partition wall 62, an area in which the hexagonal column is accommodated is provided between the partition wall 62, the caster side locking claw 63, and the inner side surface 64 of the height adjustment knob 6. Thus, the shaft side fitting portion 72 is accommodated. As described above, the space in which the hexagonal column is accommodated is called a knob side fitting portion. Two caster side latching claws 63 are provided. A plurality of grooves that are substantially orthogonal to the circumferential direction of the cross section are provided on the outer peripheral surface of the height adjustment knob 6, and a slip-proof portion that prevents slipping when the user rotates the height adjustment knob 6. Work as 65.

Further, as shown in FIG. 9, the cross section of the shaft side fitting portion 72 and the cross section of the knob side fitting portion are substantially coincident with each other. By rotating in the direction, the depth at which the height adjusting shaft 7 is inserted into the female screw portion 34 of the leg 3 can be adjusted. Moreover, the length which the caster side latching claw 63 protrudes in the center direction of the cross section of the height adjustment knob 6 becomes long as it goes to the leg 3 side from the caster 5 side. Therefore, when the height adjustment knob 6 is connected to the shaft-side fitting portion 72, the caster-side locking claw 63 can easily get over the shaft-side fitting portion 72. Movement in the direction of removal from the adjustment shaft 7 is restricted.

  Such a height adjustment knob 6 is an elastic body and can be formed of, for example, a synthetic resin such as plastic. Specifically, polyacetal (or “POM (Polyoxymethylene)”) can be preferably used, but may be nylon or the like. Further, the height adjustment knob 6 may adopt a so-called cut-off shape to eliminate the undercut shape, and the leg side locking claw 61 and the caster side locking claw 63 may be injection-molded. Moreover, the leg side latching claw 61 and the caster side latching claw 63 can also be formed with the metal mold | die which employ | adopted the slide mechanism. With such a configuration, the total number of parts can be suppressed, and the manufacturing cost can be reduced.

  Next, interference between the extending portion 31 and the height adjustment knob 6 will be described with reference to FIG. 10 is a cross-sectional view taken along the line BB in FIG. In addition, a BB cross section is a cross section which looked at the cross section of the extending | stretching part 31 toward the leg 3 side from the caster 5 side in the state which connected the leg 3, the height adjustment shaft 7, and the caster 5. FIG.

  As shown in FIG. 10, the extending portion 31 has a substantially circular cross section, but has three convex portions 33 on the outer periphery. In addition, the convex part 33 is provided over substantially the whole length of the axial direction of the extending part 31 substantially parallel to the axial direction of the extending part 31. Moreover, the convex part 33 is a curved surface in which the center in the circumferential direction protrudes most. Thus, the extending portion 31 corresponding to the end portion of the leg 3 has radial unevenness on the outer periphery in a cross-sectional view.

  Further, as shown in FIG. 10, the leg-side latching claw 61 of the height adjustment knob 6 comes into contact with the convex portion 33 of the leg 3 to cause resistance when the user rotates the height adjustment knob 6. It has become. That is, the height adjustment knob 6 has radial irregularities on the inner periphery in a cross-sectional view. And the unevenness | corrugation of the outer periphery of the extending | stretching part 31 and the unevenness | corrugation of the inner periphery of the height adjustment knob 6 suppress the relative rotation of the extending | stretching part 31 and the height adjustment knob 6. FIG.

  In other words, the maximum value of the outer peripheral radius of the cross section of the extending portion 31 is larger than the minimum value of the inner peripheral radius of the cross section of the height adjustment knob 6. However, as described above, in the present embodiment, the height adjustment knob 6 is formed of a synthetic resin having a predetermined elasticity. Moreover, as shown in FIG. 10 etc., the both ends of the circumferential direction of the leg side latching claw 61 are chamfered. Therefore, when the user rotates the height adjustment knob 6 with a force greater than a predetermined force, the height adjustment knob 6 is deformed and the leg-side locking claw 61 moves over the convex portion 33 and moves in the circumferential direction. The height of the adjuster can be adjusted. On the other hand, when the caster 5 rotates in parallel with the floor surface when the stack table 1 is moved, the convex portion 33 of the extending portion 31 interferes with the leg side latching claw 61 of the height adjustment knob 6, whereas Since the friction between the height adjusting shaft 7 and the caster 5 is reduced by using a bearing, the caster 5 side rotates. That is, it is possible to prevent the height of the adjuster from changing as the caster 5 rotates. In addition, the unevenness | corrugation of the outer periphery of the extending | stretching part 31 and the unevenness | corrugation (leg side latching claw 61) of the inner periphery of the height adjustment knob 6 are each also called the rotation suppression part which concerns on this invention. That is, the leg side latching claw 61 functions as a rotation suppressing part and a retaining part.

<Effect>
As described above, the adjuster according to the present embodiment allows the user to easily adjust the height by rotating the height adjustment knob 6 in the circumferential direction. Moreover, the unevenness | corrugation of the outer periphery of the extending | stretching part 31 and the unevenness | corrugation of the inner periphery of the height adjustment knob 6 suppress the relative rotation of the extending | stretching part 31 and the height adjustment knob 6, and maintain the state after height adjustment. Improves performance. Furthermore, it is possible to suppress the height adjustment shaft 7 from falling off the leg 3 by the leg side latching claw 61 and the protruding portion 32. Further, the adjuster according to the present embodiment includes an internal thread portion 34 provided at the end of the leg 3, a height adjustment shaft 7, and a height adjustment knob 6. Such an adjuster can be said to have a smaller number of parts than a conventional height adjusting device having a member for maintaining the adjustment state, a retaining member, and the like. Therefore, the adjuster according to the present embodiment also has an advantage that the manufacturing cost can be reduced by suppressing the number of parts.

<Stack table>
The adjuster according to the present invention can be provided on various furniture legs. For example, it can be suitably used for so-called office furniture such as office desks, chairs, shelves, cabinets, partitions, and whiteboards in addition to furniture provided in the house. Hereinafter, the stack table 1 equipped with the adjuster according to the embodiment will be described as an example of furniture with reference to FIGS. 11 to 16.

  FIG. 11 is a perspective view of the stack table 1 shown in FIG. In the description of the stack table, the direction in which the curtain plate 4 is attached is referred to as the front for convenience. FIG. 12 is a right side view of the stack table 1 shown in FIG.

  As shown in FIG. 11, the curtain plate 4 is provided with a plurality of horizontal lines. In the line, the surface of the curtain plate 4 may be convex, or the surface of the curtain plate 4 may be concave. Further, as shown in FIG. 12, the curtain plate 4 has a curved surface and is convex on the front surface of the stack table 1. Further, as shown in FIG. 12, the portion of the leg 3 from the top plate 2 to the caster 5 on the front side of the stack table 1 is called a main column portion 3A, and the portion of the stack table 1 extended from the main column portion 3A. The portion up to the caster 5 on the back side is referred to as a column portion 3B.

  The stack table 1 has a shelf 8 formed of a pipe-like member vertically below the top plate 2. In addition, the stack table 1 has folding levers 9 that are unlocked when the stack table 1 is folded at both ends in the longitudinal direction of the top plate 2 at the bottom of the top plate 2. A mechanism for locking the top plate 2 of the stack table 1 in a used state or a folded state is housed in a folding mechanism portion 12 provided at a lower portion of the top plate 2 and at an upper portion of the legs 3. Various existing configurations can be employed for such a mechanism. Further, the curtain plate 4 is rotatably connected to a first connection member 10 that is rotatably connected to the vicinity of the center of the leg 3 and a second connection member 11 that is provided on the top plate 2 side.

  FIG. 13 is a perspective view showing the stack table 1 in a folded state. FIG. 14 is a rear view showing the stack table 1 in a folded state.

  When the stack table 1 is folded, the front side of the top plate 2 moves downward, the back side of the top plate 2 moves upward, and the top plate 2 is fixed substantially parallel to the main column portion 3A. Further, the curtain plate 4 moves downward and overlaps the main pillar portion 3A substantially in parallel. Further, the main column portion 3A and the support column portion 3B of the leg 3 do not overlap in front view or rear view. Specifically, as shown in FIG. 14, the column portion 3B extends from the position of about 1/3 from the floor surface of the main column portion 3A toward the side surface of the stack table 1 and then the stack table. 1 extends toward the back side. Furthermore, the column part 3B is gradually narrowed from the portion connected to the main column part 3A toward the tip of the leg. With such a configuration, a plurality of stack tables 1 can be stored in a compact manner by stacking a plurality of them in the front-rear direction.

  FIG. 15 is a right side view showing a state in which the stack table 1 in a folded state is stacked four times in the front-rear direction. The stack table 1 is configured so that the legs 3 do not interfere with each other when stacked in the front-rear direction. Therefore, the stack table 1 can be efficiently stored in parallel with the width in the longitudinal direction of the top plate 2 in plan view. Such a stack table 1 is also referred to as a “parallel stack table”.

16 is a perspective cross-sectional view showing a CC cross section in FIG. 15. As shown in FIG.
The cross section of the support 3 </ b> B of the leg 3 is a so-called inverted triangle, and the cross-sectional area becomes smaller toward the tip. Moreover, the support | pillar part 3B is extended toward the side surface direction of the stack table 1 from the position of about 1/3 from the floor surface in the main pillar part 3A, and is extended toward the back surface direction of the stack table 1 after that. . With the configuration as described above, a plurality of stack tables 1 can be stacked in parallel with each other with almost no gap.

  Moreover, as above-mentioned, the support | pillar part 3B is extended from the position of about 1/3 from the floor surface among 3 A of main pillar parts. The lower the support column 3B is, the easier it is for the user to straddle the support column 3B. The stack table 1 has both the purpose of avoiding interference at the time of overlapping and the purpose of ensuring the ease of entering and exiting the user.

  The stack table 1 as described above is intended to be used by being folded and moved, and the caster 5 often rotates in parallel with the floor surface about the height adjusting shaft 7. Even in such a case, with the adjuster according to the present embodiment, it is possible to prevent the end portion of the leg 3 and the height adjusting shaft 7 from rotating relatively and changing the height.

<Modification>
The numbers of the leg-side locking claws 61, the caster-side locking claws 63, and the like of the height adjustment knob 6 are not limited to the illustrated mode, and may be changed. In the above example, the caster is attached to the leg of the furniture, but the leg of the furniture may not have the caster. That is, the adjuster according to the present invention can be configured to adjust the height of the end portion of the leg that does not have a caster. Moreover, you may enable it to connect to arbitrary furniture etc. by using the front-end | tip part of the leg 3 containing the internal thread part 34 as a component. Further, adjuster parts such as the height adjustment knob 6 and the height adjustment shaft 7 may be produced, transferred or the like alone. As mentioned above, although embodiment which concerns on an example of this invention was described, the height adjustment apparatus concerning this invention can contain these combination as much as possible.

DESCRIPTION OF SYMBOLS 1 Stack table 2 Top plate 3 Leg 3A Main pillar part 3B Support | pillar part 31 Extension part 32 Projection part 33 Projection part 34 Female thread part 4 Screen board 5 Caster 51 Cylindrical part 52 Wheel 53 Cover 54 Stopper lever 6 Height adjustment knob 61 Leg Side locking claw 62 Partition wall 63 Caster side locking claw 64 Inner side surface 65 Anti-slip portion 66 Inclined portion 7 Height adjusting shaft 71 Male threaded portion 72 Shaft side fitting portion 73 Rotating shaft portion 8 Shelf 9 Folding lever 10 First connecting member 11 2nd connection member 12 Folding mechanism part

Claims (5)

A female thread portion provided at the end of the leg of the furniture and having a thread inside;
A male threaded portion that is screwed into the female threaded portion, and a shaft having a shaft-side fitting portion that is coaxially connected to the male threaded portion and has a non-circular cross section;
A rotary knob that covers at least a portion of the shaft and is fitted to the shaft-side fitting portion;
With
The rotation knob includes a rotation suppression unit that causes resistance when at least a part of the end of the leg and at least a part of the rotation knob come into contact with each other when the end of the leg and the rotation knob relatively rotate. Having height adjustment device. The rotation suppressing portion is an unevenness provided on the inner peripheral surface of the rotary knob that is substantially circular in cross-sectional view,
The height adjusting device according to claim 1, wherein unevenness provided on an outer peripheral surface of an end of the leg that is substantially circular in a cross-sectional view and the rotation suppressing portion come into contact with each other to generate resistance. The rotary knob further covers a protruding portion that protrudes in the outer peripheral direction of the cross section of the leg, which the end of the leg has at the edge on the floor surface side, and engages with the protruding portion in the extraction direction with respect to the end of the leg. The height adjusting device according to claim 1, further comprising a retaining portion that restricts movement of the shaft. A male screw part provided at an end of the leg of the furniture and screwed into a female screw part having a thread inside, and a shaft having a shaft-side fitting part that is coaxially connected to the male screw part and has a non-circular cross section;
A rotary knob that covers at least a portion of the shaft and is fitted to the shaft-side fitting portion;
With
The rotation knob includes a rotation suppression unit that causes resistance when at least a part of the end of the leg and at least a part of the rotation knob come into contact with each other when the end of the leg and the rotation knob relatively rotate. Has height adjustment parts. A leg having an internal thread portion with a thread inside at the end on the floor surface side;
A male threaded portion that is screwed into the female threaded portion, and a shaft having a shaft-side fitting portion that is coaxially connected to the male threaded portion and has a non-circular cross section;
A rotary knob that covers at least a portion of the shaft and is fitted to the shaft-side fitting portion;
With
The rotation knob includes a rotation suppression unit that causes resistance when at least a part of the end of the leg and at least a part of the rotation knob come into contact with each other when the end of the leg and the rotation knob relatively rotate. Have furniture.

Images