JP5404302B2 - Vertical adjustment device for pedestal - Google Patents

Description

  The present invention relates to a vertical adjustment device for a pedestal for adjusting the height of a table top or the height of a chair seat.

  As a conventional vertical adjustment device for a pedestal, for example, as described in Patent Document 1, an internal thread hole in an inner cylinder, and an engagement piece that engages with a plurality of upper and lower lateral openings formed in the inner cylinder A locking member having a spring that urges the engaging piece in a direction to always detach from the lateral opening, and a fixing bolt inserted from the outer cylinder is screwed into the female screw hole to be tightened. The engagement piece is engaged with the lateral opening, and is engaged with the upper end of the outer cylinder to lock the relative movement in the vertical direction of the outer cylinder and the inner cylinder, and by loosening the fixing bolt, the spring is used to lock the locking member. Are separated from the lateral opening so that the outer cylinder and the inner cylinder can be moved relative to each other, as disclosed in Patent Document 2, a lock member fitted to the inner cylinder, A lock screw threaded into the lock member through the inner cylinder, By tightening the locking screw click member, to lock the inner and the outer cylinder tube, by loosening the lock screw, and the like to the inner and the outer cylinder tube which was relatively movable.

Japanese Patent No. 3654974 JP 2002-238687 A

  However, the pedestal vertical adjustment devices described in Patent Documents 1 and 2 both allow the outer cylinder and the inner cylinder to move relative to each other when the fixing bolt or the lock screw is loosened. When adjusting the position, hold the inner cylinder or outer cylinder by hand, position the engagement piece of the lock member in the desired lateral opening or engagement groove of the inner cylinder, and then fix it again. Bolts and lock screws must be tightened, and the alignment work between the engagement piece and the engagement groove is troublesome, and it takes time to adjust the pedestal vertically. Especially when it is a pedestal of a desk or chair, if you try to adjust the vertical position by putting them upright, the load on the top plate or seat will be applied to the inner cylinder or outer cylinder. The work of adjusting the vertical position of the pedestal while holding the tube by hand is very troublesome and places a heavy burden on the operator.

  Moreover, since the lock member is accommodated in the inner cylinder and it is difficult to see from the outside in any of those described in Patent Documents 1 and 2, the engagement piece of the lock member is used as the engagement groove. It is troublesome to position and engage.

  The present invention has been made paying attention to such problems, and it is easy to position and engage the engagement pieces and engagement holes of the lock member, and to move the inner cylinder or the outer cylinder downward. It is an object of the present invention to provide a vertical adjustment device for a pedestal that can be easily adjusted in the vertical position so that the outer cylinder and the inner cylinder can be fixed by a fixing bolt in a state where the movement is prevented.

In order to solve the above-described problem, the vertical adjustment device for a pedestal according to the present invention includes:
A vertical adjustment device for a pedestal comprising an outer cylinder and an inner cylinder fitted in the outer cylinder so as to be relatively movable up and down,
A plurality of engagement holes facing the direction perpendicular to the longitudinal direction are formed on the outer peripheral surface of the inner cylinder at intervals in the vertical direction, and bolt tightening has a plurality of upper and lower female screw holes inside the inner cylinder. A locking member having an engagement piece selectively engageable with the plurality of engagement holes on a slider that is slidably fitted to the inner cylinder so as to be vertically slidable; Between the engagement position where the piece engages with the engagement hole and the non-engagement position where the engagement piece separates from the engagement hole, it is pivotally attached so as to be able to rotate up and down, and the lock member is engaged. When the engagement piece is rotated to the alignment position, the engagement piece engages with one of the engagement holes and abuts against the end surface on the slider side of the outer cylinder, thereby moving the inner cylinder or the outer cylinder downward. In this state, the outer cylinder, the lock member, and the bolt formed at the center of each engagement hole The fixing bolt inserted through the through hole by tightening screwed to one of the plurality of internally threaded holes, is characterized in that as may fix the outer cylinder and the inner cylinder and the lock member.
According to this feature, when the lock member is rotated to the engagement position and the engagement piece is engaged with an arbitrary engagement hole of the inner cylinder, the engagement piece also contacts the end surface of the outer cylinder on the slider side. Since the downward movement of the inner cylinder or the outer cylinder is prevented, it is not necessary to fix the inner cylinder and the outer cylinder with the fixing bolt while holding the inner cylinder or the outer cylinder to which the load is applied by hand, The adjustment work of the vertical position of the pedestal becomes easy. Further, the lock member is pivotally attached to a slider that is slidably fitted to the inner cylinder, and the positioning and engagement work between the engagement piece of the lock member and the engagement hole of the inner cylinder is visually observed. Can be done quickly.

The pedestal vertical adjustment device of the present invention is
The vertical dimension from the end surface where the engagement piece of the lock member in the outer cylinder abuts to the center of the bolt insertion hole provided in the outer cylinder, the plurality of bolt insertion holes of the inner cylinder and the bolt fastening member, and the plurality of female screw holes It is characterized by being almost equal to the pitch.
According to this feature, when the lock member is rotated to the engagement position and the engagement piece contacts the end surface of the outer cylinder on the slider side, the bolt insertion holes of the lock member, the outer cylinder, and the inner cylinder Since the female screw holes are aligned substantially in a straight line, the lock member, the outer cylinder, and the inner cylinder can be easily fixed by the fixing bolt.

The pedestal vertical adjustment device of the present invention is
The lock member includes a lock fitting having an engagement piece and a cover member that covers a portion of the lock fitting excluding the engagement piece. It is characterized by wearing.
According to this feature, the appearance of the lock member is improved.

The pedestal vertical adjustment device of the present invention is
The cover member is provided with a fitting hole into which the head of the fixing bolt is fitted.
According to this feature, since the head of the fixing bolt is not exposed, the appearance of the lock member is further improved.

The pedestal vertical adjustment device of the present invention is
A fitting groove into which the engaging piece is fitted is provided on an end surface of the outer cylinder on which the engaging piece of the lock member abuts.
According to this feature, the end face of the slider can be brought into contact with the open end of the outer cylinder, so that a gap is not formed between the opposed faces, the appearance is improved, and the lock member is prevented from wobbling. Is done.

It is a perspective view of a desk provided with the pedestal of the present invention. It is a disassembled perspective view of the principal part of a pedestal. Similarly, it is an inner side view of the principal part of a pedestal. Similarly, it is a perspective view of the principal part of a pedestal. It is a longitudinal cross-sectional view which follows the VV line of FIG. Similarly, it is a cross-sectional plan view along the VI-VI line. It is a longitudinal section explaining the procedure which adjusts the up-and-down position of a pedestal. Similarly, it is a longitudinal sectional view for explaining the procedure for adjusting the vertical position of the pedestal. It is a perspective view of the principal part which shows the modification of a pedestal. Similarly, it is a longitudinal cross-sectional view explaining the procedure of adjusting the vertical position of the pedestal column which shows a modification.

  EMBODIMENT OF THE INVENTION The form for implementing the pedestal vertical adjustment apparatus which concerns on this invention is demonstrated below based on an Example.

  The pedestal vertical adjustment device according to the embodiment will be described with reference to FIGS. FIG. 1 is a perspective view of a desk equipped with an embodiment of the present invention. A leg 1 of this desk is erected on a pair of left and right base legs 2 and 2 facing in the front-rear direction, and at the center of both base legs 2. The pair of left and right leg columns 3 and 3 and a horizontal bar 4 connecting the opposing surfaces of the lower end portions of both leg columns 3, and the top plate 5 is supported by the upper ends of the left and right leg columns 3. ing.

  2 is an exploded perspective view of the main part of the pedestal 3, FIG. 3 is an inner side view of the main part, FIG. 4 is also a perspective view, and FIG. 5 is a longitudinal side view along the line V-V in FIG. FIG. 6 and FIG. 6 are cross-sectional plan views along line VI-VI. Since the left and right pedestals 3 are bilaterally symmetric and have the same structure, only the left pedestal 3 in FIG. 1 will be described below.

  The pedestal 3 is composed of an outer cylinder 6 having an approximately elliptical cross section and an inner cylinder 7 having an elliptical section slidably fitted in the upper part thereof. An adjusting device 8 is provided. A cylindrical guide member 9 made of a synthetic resin that slidably guides the inner cylinder 7 is provided at the upper end of the outer cylinder 6, and the lower surface of the outward flange 9 a continuously provided at the upper end of the outer cylinder 6 It is fitted from above so as to contact the upper end (see FIG. 5).

  The guide member 9 is formed with two slits that open downward on the outer peripheral surface on the inner side surface thereof, so that the elastic locking pieces 10 are integrally connected to each other, and outwardly projecting from the lower end thereof. The locking claw 10a is elastically engaged with a locking hole 11 formed on the inner side surface of the upper end portion of the outer cylinder 6, so that the guide member 9 is prevented from coming off.

  Recessed fitting grooves 12 and 12 into which engagement pieces 27b of lock fittings 27 to be described later are fitted are formed at the open ends (upper ends) on the inner side surfaces of the outer cylinder 6 and the guide member 9, respectively. . An insertion hole 13 for a fixing bolt 30 to be described later is formed on the inner surface of the outer cylinder 6 below the locking hole 11.

  As shown in FIG. 5, a sliding member 14 made of synthetic resin is provided at the lower end portion of the inner cylinder 7 so that the outer peripheral surface of the enlarged diameter flange portion 14 a continuously provided at the lower end is in sliding contact with the inner surface of the outer cylinder 6. Thus, it is fitted from below. A through hole 15 facing in the left-right direction is formed in the lower end portion of the sliding member 14, and a tapping screw 16 is screwed into the through hole 15, and the head portion 16 a is formed in the lower end portion on the inner side surface of the inner cylinder 7. The sliding member 14 is prevented from coming off downward by being positioned in the through hole 17.

  On the inner surface of the inner cylinder 7, a plurality of engagement holes 18 that are perpendicular to the longitudinal direction, that is, in the front-rear direction, are formed at equal intervals in the vertical direction. A bolt insertion hole 19 that expands upward and downward in an arc shape is formed.

  As shown in FIGS. 5 and 6, a bolt fastening member 20 having an inwardly U-shaped cross section in a plan view is slightly longer in the vertical dimension than the region where the engagement hole 18 is formed on the inner surface of the inner cylinder 7. Is fixed by welding or the like. A plurality of upper and lower bolt insertion holes 21 are formed on the vertical piece 20 a parallel to the inner surface of the inner cylinder 7 of the bolt fastening member 20 so as to be aligned with the bolt insertion holes 19 of the inner cylinder 7. ing.

  Further, a plurality of upper and lower female screw cylinders 22 are fixed to the outer surface of the vertical piece 20a by welding or the like so as to be concentric with the bolt insertion holes 19 and 21. The vertical pitch of the engagement hole 18, the bolt insertion holes 19, 21 and the female screw cylinder 22 is the vertical dimension from the upper end of the fitting groove 12 of the outer cylinder 6 to the center of the bolt insertion hole 13 below it. It is almost equal.

  A synthetic resin slider 23 is externally fitted to a portion of the inner cylinder 7 protruding above the outer cylinder 6 so as to be slidable in the vertical direction. On the inner side surface of the slider 23, as shown in FIG. 2, a U-shaped protrusion 24 is formed inwardly projecting inward in the left and right directions and facing downward, and faces the front and rear of the protrusion 24. In the upper end portions of the downward pieces 24a, 24a, pivot grooves 25, 25 that are U-shaped inwardly opening in the front and opposite sides are formed to face each other.

  Reference numeral 26 denotes a lock member, which includes a lock fitting 27 and a cover member 28 made of synthetic resin. As shown in FIGS. 2, 5, and 6, the lock fitting 27 includes a base piece 27 a that faces in the up-and-down direction, a horizontal engagement piece 27 b that is connected to the upper end of the lock piece 27, and a base engagement piece 27 b. Inwardly bent pieces 27c and 27c are provided continuously at the front and rear ends. The protrusion dimension and the width dimension of the engagement piece 27 b are such that the engagement piece 27 b can be inserted into and removed from the engagement hole 18 of the inner cylinder 7, and the engagement piece 27 b is fitted between the outer cylinder 6 and the guide member 23. The width is such that the groove 12 can be fitted from above.

  The cover member 28 includes a case portion 28a whose outer surface is opened, and a mounting portion 28b that protrudes upward on the upper surface of the cover member 28, and both inwardly bent pieces of the lock fitting 27 are provided in the case portion 28a. By press-fitting 27 c, the portion of the lock fitting 27 excluding the engagement piece 27 b is covered with the cover member 28 in a good appearance.

  The front-rear dimension of the attachment portion 28b of the cover member 28 is a size that is loosely fitted between the two downward pieces 24a of the slider 24, and is a pair of supports facing the front and rear sides protruding from the upper end portion of the attachment portion 28b. By fitting the shafts 29 and 29 into the pivot grooves 25 of the two downward pieces 24 a, the lock member 26 is moved from the engagement position where the engagement piece 27 b engages with the engagement hole 18 of the inner cylinder 7. The slider 24 is pivotally attached to the slider 24 so that the engagement piece 27b can rotate to a non-engagement position where the engagement piece 27b is detached from the engagement hole 18.

  The base piece 27a of the lock fitting 27 has a bolt insertion hole 31 for inserting a fixing bolt 30 with a hexagonal hole for fixing the outer cylinder 6 and the inner cylinder 7, and a case portion 28a of the cover member 28 includes The slightly larger diameter fitting holes 32 into which the heads 30a of the fixing bolts 30 are fitted are formed so as to be concentric with each other. The vertical adjustment device 8 for the pedestal 3 is configured by the engagement hole 18 provided in the inner cylinder 7, the slider 23, the lock member 26, the fixing bolt 30, and the like.

  The vertical dimension from the lower surface of the engagement piece 27b to the center of the bolt insertion hole 31 is substantially equal to the vertical dimension from the upper end of the fitting groove 12 of the outer cylinder 6 to the center of the bolt insertion hole 13 below. is there. In this manner, the engagement piece 27b is fitted into the fitting groove 12 of the outer cylinder 6 in a state where the engagement piece 27b of the lock fitting 27 is engaged with any of the engagement holes 18 of the inner cylinder 7. When it is brought into contact with the upper end of the lever, the bolt insertion hole 31 of the lock fitting 27 and the bolt insertion hole 13 of the outer cylinder 6 are aligned with each other.

  Further, as described above, the vertical pitches of the engagement holes 18, the bolt insertion holes 19 and 21, and the female screw cylinder 22 are set from the upper end of the fitting groove 12 of the outer cylinder 6 to the center of the bolt insertion hole 13 below that. Therefore, the bolt insertion hole 31 of the lock fitting 27 is also aligned with the bolt insertion holes 19 and 21 of the inner cylinder 7 and the bolt fastening member 20. Accordingly, the fixing bolt 30 inserted from the lock member 26 can be easily screwed into the female screw cylinder 22 (see FIG. 5).

  Next, with reference to FIG.7 and FIG.8, the procedure at the time of adjusting the vertical position of the pillar 3 is demonstrated.

  First, the fixing screw 30 is loosened and removed from the lock member 26. In this state, since the engagement piece 27b of the lock member 26 is still engaged with the engagement hole 18 of the inner cylinder 7 and is in contact with the upper end of the fitting groove 12 of the outer cylinder 6, the inner cylinder 7 There is no fear of moving down. Therefore, it is not necessary to hold the inner cylinder 7 by hand, and even if the load on the top plate 5 is applied to the inner cylinder 7, the work of removing the fixing bolt 30 can be performed safely.

  Next, as shown in FIG. 7, the lock member 26 is rotated upward until the engagement piece 27 b is detached from the engagement hole 18 of the inner cylinder 7 and the fitting groove 12 of the outer cylinder 6.

  Next, as shown in FIG. 8, after the slider 23 is slid in the vertical direction, as shown in FIG. 5, the lock member 26 is rotated downward, and the engagement piece 27b is moved to a desired height of the inner cylinder 7. The engagement hole 18 is engaged. Since this operation can be performed while observing the engaging piece 27b and the engaging hole 18 of the lock member 26, they can be easily positioned and rapidly engaged.

  Next, the inner cylinder 7 is moved downward, and the engagement piece 27 b of the lock member 26 is fitted into the fitting groove 12 of the outer cylinder 6. As described above, when the engagement piece 27b is fitted in the fitting groove 12, the lower end of the slider 23 can be brought into contact with the upper end of the outer cylinder 6, so that a gap is prevented from being formed therebetween. At the same time, the locking member 26 is also prevented from wobbling in the front-rear direction.

  Finally, as shown in FIG. 5, the fixing bolt 30 inserted from the fitting hole 32 of the cover member 28 of the lock member 26 is provided on the lock fitting 27, the outer cylinder 6, the inner cylinder 7, and the bolt fastening member 20. Further, the bolts are inserted into the bolt insertion holes 31, 13, 19, 21 that are aligned with each other, screwed into the female screw cylinder 22, and tightened. By performing the series of operations simultaneously on the left and right, the outer cylinder 6, the inner cylinder 7, and the lock member 26 are fixed, and the pedestal 3 can be adjusted to a desired vertical position.

  The bolting operation can be performed in a state where the engagement piece 27b of the lock member 26 is in contact with the fitting groove 12 of the outer cylinder 6 and prevents the inner cylinder 7 from moving downward. There is no need to hold 7 by hand, which can be done very easily.

  9 and 10 show a modified example in which the outer cylinder 6 and the inner cylinder 7 are turned upside down. In this case, the slider 23 and the lock member 26 are placed on the lower inner cylinder 7 in the above embodiment. When the lock member 26 is rotated to the downward non-engagement position, the engagement piece 27b is detached from the engagement hole 18 of the inner cylinder 7 and the fitting groove 12 at the lower end of the outer cylinder 6. Then, when the lock member 26 is rotated to the upward engagement position, the engagement piece 27 b may be reengaged with the arbitrary engagement hole 18 and the fitting groove 12.

  Also in this modified example, when the lock member 26 is turned upward to the engagement position, the outer cylinder 6 is prevented from moving downward, so that the fixing bolt 30 can be easily removed and tightened. it can.

  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, the lock member 26 is composed of the lock fitting 27 and the cover member 28 covering the lock member 27. For example, the engagement piece 27b is integrally connected to the cover member 28, The member 28 may be omitted and only the lock fitting 27 may be used. When only the lock fitting 27 is used, a pivot piece or the like pivoted on the slider 23 may be provided so as to protrude upward.

  Further, the fitting groove 12 provided at the opening end of the outer cylinder 6 may be omitted, and the engaging piece 27b may simply be brought into contact with the opening end of the outer cylinder 6.

  Further, the guide member 9 and the sliding member 14 may be omitted, and the outer cylinder 6 and the inner cylinder 7 may be simply slidably fitted.

  Further, the bolt fastening member 20 having a plurality of female screw cylinders 22 is provided inside the inner cylinder 7, but the bolt fastening member having one female screw cylinder 22 is raised from the lower part (or upper part) inside the outer cylinder 6. It is also possible to install (or suspend) the inner screw cylinder 22 inside the inner cylinder 7.

  Of course, the present invention can be applied to the pedestal of a chair or other furniture in addition to the pedestal of the desk.

DESCRIPTION OF SYMBOLS 1 Leg body 2 Base leg 3 Leg pillar 4 Horizontal board 5 Top plate 6 Outer cylinder 7 Inner cylinder 8 Vertical adjustment device 9 Guide member 9a Outward flange part 10 Elastic locking piece 10a Locking claw 11 Locking hole 12 Fitting groove 13 Bolt insertion hole 14 Sliding member 15 Through hole 16 Tapping screw 17 Through hole 18 Engagement hole 19 Bolt insertion hole 20 Bolt tightening member 20a Vertical piece 21 Bolt insertion hole 22 Female screw cylinder (female screw hole)
23 Slider 24 Protruding portion 24a Downward piece 25 Pivoting groove 26 Locking member 27 Locking bracket 27a Base piece 27b Engagement piece 27c Inwardly bent piece 28 Cover member 28a Case portion 28b Mounting portion 29 Support shaft 30 Fixing bolt 30a Head portion 31 Bolt insertion hole 32 fitting hole

Claims (5)

A vertical adjustment device for a pedestal comprising an outer cylinder and an inner cylinder fitted in the outer cylinder so as to be relatively movable up and down,
A plurality of engagement holes facing the direction perpendicular to the longitudinal direction are formed on the outer peripheral surface of the inner cylinder at intervals in the vertical direction, and bolt tightening has a plurality of upper and lower female screw holes inside the inner cylinder. A locking member having an engagement piece selectively engageable with the plurality of engagement holes on a slider that is slidably fitted to the inner cylinder so as to be vertically slidable; Between the engagement position where the piece engages with the engagement hole and the non-engagement position where the engagement piece separates from the engagement hole, it is pivotally attached so as to be able to rotate up and down, and the lock member is engaged. When the engagement piece is rotated to the alignment position, the engagement piece engages with one of the engagement holes and abuts against the end surface on the slider side of the outer cylinder, thereby moving the inner cylinder or the outer cylinder downward. In this state, the outer cylinder, the lock member, and the bolt formed at the center of each engagement hole A fixing bolt inserted through the through hole is screwed into any of the plurality of female screw holes and tightened to fix the outer cylinder, the inner cylinder, and the lock member. Vertical adjustment device.   The vertical dimension from the end surface where the engagement piece of the lock member in the outer cylinder abuts to the center of the bolt insertion hole provided in the outer cylinder, the plurality of bolt insertion holes of the inner cylinder and the bolt fastening member, and the plurality of female screw holes The vertical adjustment device for a pedestal according to claim 1, wherein the vertical adjustment device is substantially equal to the pitch of the pedestal.   The lock member includes a lock fitting having an engagement piece and a cover member that covers a portion of the lock fitting excluding the engagement piece. The pedestal vertical adjustment device according to claim 1 or 2, wherein the pedestal vertical adjustment device is worn.   The vertical adjustment device for a pedestal according to claim 3, wherein the cover member is provided with a fitting hole into which a head of the fixing bolt is fitted.   The vertical adjustment device for a pedestal according to any one of claims 1 to 4, wherein a fitting groove into which the engagement piece is fitted is provided on an end surface of the outer cylinder on which the engagement piece of the lock member abuts. .

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