JPH07261A - Household furniture - Google Patents

Abstract

PURPOSE:To provide the household furniture capable of attaching and detaching simply an extension support, and also, of attaching the extension support with high fitting strength. CONSTITUTION:This household furniture is provided with a support 2 which is like a hollow prism and in which plural bracket fitting slits 1 are provided at prescribed intervals along the longitudinal direction on the side face. Also, this furniture is provided with an extension support 6 having an insertion part 5 fitted into an opening 4 of the upper end of the support 2 in the lower end. The extension support 6 is like a hollow prism and plural bracket fitting slits 3 are provided at prescribed intervals along the longitudinal direction on the side face. Moreover, this furniture is provided with an engager 7 which is inserted into the bracket fitting slit 1 of the support 2 to which the extension support 6 is attached, and also, is engaged with the extension support 6 and engages the support 2 and the extension support 6 with each other.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fixture for displaying products such as sportswear.

[0002]

2. Description of the Related Art Heretofore, in a furniture for hanging and displaying products such as clothes and sportswear, the type of the product to be displayed may be changed depending on the season. For example, a product such as tennis wear may be changed to a product such as ski wear. When suspending a product having a long length such as ski wear, it is necessary to increase the height of the furniture. Occurs. In this case, as shown in FIG. 20, the top cap 25 attached to the upper end opening of the support column 2 by driving is removed, and the insertion portion 5 of the extension support column 6 provided with the insertion portion 5 at the lower portion is attached to the support column 2. It is designed to be inserted into the upper end opening 4 so that the height dimension of the support column 2 is increased by the length dimension of the extension support column 6.

[0003]

However, in the conventional example as described above, the insertion portion 5 provided at the lower portion of the extension strut 6 is simply inserted into the upper end opening 4 of the strut 2 for extension. Since only the support columns 6 are attached, if the extension support columns 6 are lifted upward during movement, the extension support columns 6 may come off, which is a problem in terms of usability.

SUMMARY OF THE INVENTION The present invention is intended to solve the above-mentioned problems, and allows the extension columns to be easily attached and detached while the extension columns can be attached with a high attachment strength. It is intended to provide good furniture.

[0005]

According to the present invention, in order to achieve the above object, a pillar 2 having a hollow prismatic shape and a plurality of bracket mounting slits 1 provided on its side surface at predetermined intervals along the longitudinal direction. And a supporting pillar for extension having a hollow prismatic shape, a plurality of bracket mounting slits 3 provided on the side surface at predetermined intervals along the longitudinal direction, and an insertion portion 5 fitted at the lower end to the upper end opening 4 of the supporting pillar 2. 6 and the insertion column 5 is inserted into the upper end opening 4 and the extension column 6 is inserted into the bracket mounting slit 1 of the column 2 and the extension column 6 is inserted.
And an engaging member 7 that engages with each other to engage the support column 2 and the extension support column 6 with each other.

Further, according to a second aspect of the present invention, the engaging tool 7 inserted into the bracket mounting slit 1 of the support column 2 has the bracket mounting slit 1 provided in the support column 2.
It is characterized in that it also engages with the engaging slit 8 provided in the insertion portion 5 of the extension strut 6 corresponding to the position. Further, according to the third aspect, the engagement tool 7 is composed of an insertion tool 9 to be inserted into the bracket mounting slit 1 of the column 2, and a fixing tool 10 for holding and fixing the insertion tool 9. Insert 9 is tightening screw 1
1, the fixture 10 is provided with a screw hole 12 into which a tightening screw 11 is screwed, and an engagement hole 13 that is inserted into and engages with the tip of the insertion side protruding from the bracket mounting slit 1. It is a feature.

Further, in the fourth aspect of the present invention, the engaging member 7 is an engagement member which is arranged on one side surface of the connecting portion between the support column 2 and the extension support column 6 over the support column 2 and the extension support column 6. The tool half body 14 and the other side surface of the connecting portion between the support pillar 2 and the extension support pillar 6 are composed of the engagement tool half body 15 arranged over the support pillar 2 and the extension support pillar 6, and Body 14
Is provided with a tightening screw 11, the other half of the engaging tool 15 has a screw hole 12 into which the tightening screw 11 is screwed, and each of the engaging tool halves 14 and 15 corresponds to the bracket mounting slit 1 of the column 2. It is characterized in that it is provided with an insertion projection 16 which is inserted into the bracket mounting slit 3 of the extension column 6 to connect the column 2 and the extension column 6 to each other.

Further, according to a fifth aspect of the present invention, at least one of the insertion protrusions 16 inserted into the bracket mounting slits 1 and 3 of the column 2 or the extension column 6 has a bracket mounting slit 1, It is characterized in that a taper portion 17 is provided for urging the support column 2 and the extension support column 6 in a direction of bringing them closer to each other when the support column 2 is inserted into the column 3.
Further, in the sixth aspect of the present invention, the engaging tool 7 is engaged with the bracket mounting slit 1 located at the uppermost end of the support column 2 below the thin plate 18 inserted into the support column 2 and the extension support column 6. It is characterized in that the lower claw 19 to be fitted is provided, and the upper claw 20 to be engaged with the bracket mounting slit 3 located at the lowermost end of the extension column 6 is provided on the upper part of the thin plate 18.

[0009]

Thus, the insertion portion 5 of the extension strut 6 is inserted into the upper end opening 4 of the strut 2, and the bracket attachment slit 1 of the strut 2 and the engaging tool 7 engaged with the extension strut 6 are formed as the strut 2. By installing the extension strut 6 at a connection portion with the extension strut 6, the extension strut 6 can be attached so as not to easily come off. Further, by removing the engagement tool 7, the extension support 6 can be easily removed.

[0010]

The present invention will be described below in detail based on the illustrated embodiments. The furniture in the present invention includes a basic furniture A formed at a predetermined height as shown in FIG. 1, and a basic furniture A.
The main body is composed of an extension strut 6 detachably attached to the base fixture A, and the extension strut 6 detachably attached to the basic fixture A is connected and fixed to the strut 2 of the basic fixture A by an engagement tool 7. It has become.

As shown in FIGS. 1 and 5, the basic furniture A includes an inverted T-shaped support 2, a lower spacer 21 installed between the lower parts of the adjacent supports 2, and an upper part of the adjacent support 2. A center panel 2 installed between the upper spacer 22 and the pillars 2 adjacent to each other between the upper and lower spacers 21 and 22.
The subject is composed of 3 and 3. The pillar 2 is a hollow prism and has a plurality of bracket mounting slits 1 provided on both side surfaces thereof at a predetermined interval along the longitudinal direction. And the casters 24 are provided on the lower surfaces of the end portions of both leg pieces 2b.
Is attached. A top cap receiving nut 27 to which a countersunk bolt 26 for fixing the top cap 25 is screwed is provided at the center of the upper end opening 4 of the column 2. Here, since the top cap 25 is attached to the upper end opening 4 of the support column 2 by the countersunk bolt 26, the top and bottom cap 25 can be attached / detached many times by attaching / detaching the countersunk bolt 26. You can do it. In other words, if the upper cap 4 is detached from the upper end opening 4 after being attached like a synthetic resin top cap that is attached by tapping or the like, the attachment to the upper end opening 4 becomes unsatisfactory and it is not possible to attach it again and again. It can be attached and removed. Further, a top cap receiving nut 27 for detachably attaching the top cap 25 with a countersunk bolt 26 is also provided in an upper end opening 6b of an extension column 6 described later. A locking hole 28 is provided on the outer surface of the column main body 2a on the lower side, which is orthogonal to the outer surface on which the bracket mounting slit 1 is provided, with which the locking piece 21a provided at the end of the lower spacer 21 is engaged. Further, a locking hole 29 with which the locking piece 22a provided at the end of the upper spacer 22 is engaged is provided on the outer surface on the upper side orthogonal to the outer surface provided with the bracket mounting slit 1. There is.

The upper and lower spacers 21 and 22 provided between the upper and lower portions of the adjacent columns 2 are provided with receiving pieces 30 so as to face each other vertically, and the center panel 23 receives the upper and lower ends. It is installed between the adjacent support columns 2 between the upper and lower spacers 21 and 22 so as to engage with the fitting groove 30 a formed by 30. Reference numeral 31 is a shelf board mounted between the leg pieces 2b of the adjacent columns 2.

The extension strut 6 connected to the strut 2 has a strut body 6a provided with a plurality of bracket mounting slits 3 at predetermined intervals along the longitudinal direction like the strut 2, and a lower portion of the strut body 6a. The main body is configured by integrally projecting an insertion portion 5 to be inserted into the upper end opening 4 of the column 2. The insertion portion 5 is configured by protruding a pair of insertion pieces 5a having a U-shaped cross section, which are open laterally from both lower ends of the column main body 6a. Reference numeral 32 is a locking hole into which a locking piece 33a provided at the end of the upper spacer 33 is hooked and locked.

As shown in FIG. 2, the engagement tool 7 for connecting and fixing the support 2 and the extension support 6 to each other is an insertion tool 9 which is inserted into the bracket mounting slit 1 of the support 2, and an insertion tool 9.
The main body is configured with a fixture 10 for holding and fixing the. The insertion tool 9 constituting the engagement tool 7 includes a vertical piece 9a and a horizontal piece 9b.
And L-shaped, and the horizontal piece 9b is provided with a tightening screw 11 rotatably. Here, the vertical piece 9a inserted into the bracket mounting slit 1 provided on the support column 2 is larger than the width dimension of the support column 2 so that the tip of the vertical piece 9a protrudes from the bracket mounting slit 1 when inserted into the bracket mounting slit 1. It has a slightly larger length.

The fixing tool 10 constituting the engaging tool 7 is formed from one end of a fixing tool body 10a formed of a strip plate material.
The connecting piece 10b is projected in the direction orthogonal to 0a, and the fixing piece 10c is projected in the direction orthogonal to the fixing body 10a from the other end of the fixture body 10a to the side opposite to the connecting piece 10b. And the engaging hole 13 into which the tip of the vertical piece 9a of the insertion tool 9 is inserted and locked in the connecting piece 10b.
The fixing piece 10c is provided with a screw hole 12 into which a tightening screw 11 provided on the lateral piece 9b of the insertion tool 9 is screwed.

Therefore, a bracket (not shown) is connected to the bracket mounting slit 1 of the column 2, and a product such as clothes such as tennis wear is displayed in a hanging state by a hanger. In the case of a short length product such as tennis wear, the product is displayed with the basic fixture A as it is without the extension columns 6 as shown in FIG. Further, in the case of a product having a long length such as ski wear, as shown in FIG. 1, an extension column 6 is attached to increase the height and a product having a long length is displayed. . That is, when the season is off, the extension fixture 6 is not installed as shown in FIG. 5 and the fixture A is used as it is, and the extension fixture 6 is installed during the season as shown in FIG. It is used in the state where the height is changed, and the height dimension is freely changed according to the season. When the extension strut 6 is connected to the upper portion of the strut 2 to increase the height, the insertion portion 5 of the extension strut 6 is inserted into the upper end opening 4 of the strut 2 to form the engagement tool 7. The vertical piece 9a of the tool 9 is inserted from the bracket mounting slit 1 having one side on the pillar 2 through the engaging slit 8 provided on the insertion portion 5 into the bracket mounting slit 1 having the other side. The other side is a bracket mounting slit 1
The tip of the vertical piece 9a that projects more is connected to the connecting piece 10
The fixing member body 10a is arranged along the outer surface of the support column 2 so as to be engaged with the engaging hole 13 provided in the fixing piece 10b.
As shown in FIG. 3, c is arranged so as to face the horizontal piece 9b of the insertion tool 9, and the tightening screw 11 provided on the horizontal piece 9b is screwed into the screw hole 12 of the fixing piece 10c to tighten it. The insertion tool 9 and the fixing tool 10 are connected and fixed to each other, so that the support pillar 2 and the extension support pillar 6 are connected and fixed to each other.

FIG. 4 shows a mounting state of the engagement tool 7 when the bracket mounting slits 1 provided on the support columns 2 are arranged in two rows. 6 to 9 show a second embodiment of the engagement tool 7, in which the engagement tool 7 has a support 2 at one side of the connecting portion between the support 2 and the extension support 6. And an engaging member half body 14 arranged over the extension strut 6, and an engaging member half body 15 arranged over the strut 2 and the extension strut 6 at the other side of the connecting portion between the strut 2 and the extension strut 6 in the frame. It consists of and.

The engaging tool halves 14 and 15 are composed of a vertical piece 34 and a horizontal piece 3.
5, the insertion protrusion 16 is provided so as to project substantially parallel to the vertical piece 34 from the upper and lower ends of the tip of the horizontal piece 35 of the main body 36 formed in an L-shaped cross section. A fixing piece 37 is provided so as to project toward the side opposite to 16 so as to be orthogonal to the vertical piece 34, and the fixing piece 37 that constitutes the engaging tool half body 15 is formed.
A tightening screw 11 is rotatably attached to the fixing piece 37, and a fixing piece 37 constituting the engaging tool half body 14 is provided with a screw hole 12 into which the tightening screw 11 is screwed.

In this case, however, when the extension column 6 is connected to the upper part of the column 2 to increase the height, the insertion portion 5 of the extension column 6 is inserted into the upper end opening 4 of the column 2. On the one side or the other side of the connecting portion between the support column 2 and the extension support column 6, and the engaging tool halves 14 and 15 are placed on the engaging tool halves 14 and 15, respectively. Insertion protrusion 16
Are engaged with the bracket mounting slits 3 of the extension columns 6, respectively, and the insertion protrusions 16 under the engaging tool halves 14 and 15 are engaged.
Is engaged with the bracket mounting slit 1 of the column 2, and the fixing piece 37 of the engaging tool half body 15 and the fixing piece 37 of the engaging tool half body 14 are engaged.
Are arranged so as to face each other, and the tightening screws 11 are screwed into the screw holes 12 and tightened, whereby the engaging tool halves 14 and the engaging tool halves 15 are connected to each other. And the extension column 6 are connected and fixed to each other.

FIG. 9 shows a mounting state of the engagement tool 7 when the bracket mounting slits 1 provided on the support columns 2 are arranged in two rows. 10 to 12 show a third embodiment of the engagement tool 7, in which the insertion protrusion 16 inserted into the bracket attachment slits 1 and 3 of the support column 2 or the extension support column 6 is shown. At least one of them is provided with a taper portion 17 for urging the support column 2 and the extension support column 6 in a direction of approaching each other as they are inserted into the bracket mounting slits 1, 3. 10 shows that the upper and lower insertion protrusions 16 provided on the engaging tool halves 14 and 15 are provided with taper portions 17, respectively, and are shown in FIG. Among the upper and lower insertion protrusions 16 provided on the engaging member half body 14, the taper portion 17 is provided only on the upper edge of the lower insertion protruding portion 16, and Among the insertion protrusions 16 provided on the body 15, one in which the tapered portion 17 is provided only on the lower edge of the upper insertion protrusion 16 is shown.

In this case, however, when the extension column 6 is connected to the upper portion of the column 2 to increase the height, the insertion portion 5 of the extension column 6 is inserted into the upper end opening 4 of the column 2. On the one side or the other side of the connecting portion between the support column 2 and the extension support column 6, and the engaging tool halves 14 and 15 are placed on the engaging tool halves 14 and 15, respectively. Insertion protrusion 16
Are engaged with the bracket mounting slits 3 of the extension columns 6, respectively, and the insertion protrusions 16 under the engaging tool halves 14 and 15 are engaged.
Is engaged with the bracket mounting slit 1 of the column 2, and the fixing piece 37 of the engaging tool half body 15 and the fixing piece 37 of the engaging tool half body 14 are engaged.
And the engaging tool half body 15 and the engaging tool half body 15 are connected to each other by arranging and so as to face each other and screwing the tightening screw 11 into the screw hole 12 and tightening. Part 16
The support column 2 and the extension support column 6 are connected by the engagement tool 7 in a state in which the support column 2 and the extension support column 6 are biased in the direction of approaching each other as indicated by an arrow in the figure,
Since the support column 2 and the extension support column 6 are connected in a state of being biased in a direction in which they are close to each other, the support column 2 and the extension support column 6 are connected and fixed to each other without rattling. It is a thing.

FIG. 12 shows the engagement tool 7 when the bracket mounting slits 1 provided on the support columns 2 are arranged in two rows.
The attached state of is shown. 14 to 18 show a fourth embodiment of the engaging member 7, and in this,
The engagement tool 7 is a thin plate 1 inserted into the support column 2 and the extension support column 6.
8 is provided with a lower claw 19 to be engaged with the bracket mounting slit 1 located at the uppermost end of the support column 2, and is attached to the bracket mounting slit 3 located at the lowermost end of the extension column 6 above the thin plate 18. It is shown configured with a mating upper pawl 20. Here, the slit 6 is formed in the insertion portion 5 of the extension strut 6 that is connected to the strut 2 by the engagement tool 7.
0 is provided.

In this case, however, when the extension column 6 is connected to the upper portion of the column 2 to increase the height, the insertion portion 5 of the extension column 6 is inserted into the upper end opening 4 of the column 2. 16A, the thin plate 18 as the engaging tool 7 is inserted from the lower claw 19 side into the bracket mounting slit 3 located at the lowermost end of the extension strut 6 as shown in FIG. As shown in (b), the thin plate 18 is rotated downward as shown by the arrow in the drawing through the slit 60,
As shown in FIG. 16C, the upper plate 20 is engaged with the lower end edge of the bracket mounting slit 3 of the extension column 6, and the thin plate 18 is further rotated. As shown in FIG. 2, the lower claw 19 is locked to the upper edge of the bracket mounting slit 1 located at the uppermost end of the support column 2 so that the thin plate 18 is housed in the extension support column 6 and the support column 2 And the extension strut 6 are mutually connected. Here, between the upper claw 20 provided on the upper part of the thin plate 18 and the lower claw 19 provided on the lower part, a slantingly inclined guide part 40 is formed, and the extension strut 6 is indicated by an arrow in FIG. When the upper claw 20 is locked, the lower end edge of the bracket mounting slit 3 at the lowermost end of the extension strut 6 locks the guide portion 40 of the thin plate 18 when the upper claw 20 is locked. It is pushed upwards, whereby the lower claw 19 of the thin plate 18 rotates in a direction to enter the bracket mounting slit 1 located at the uppermost part of the support column 2, and the extension support column 6 is easily pulled out. There is no such thing.

[0024]

As described above, according to the present invention, a pillar having a hollow prismatic shape and provided with a plurality of bracket mounting slits on the side surface at predetermined intervals along the longitudinal direction, and a hollow prismatic pillar having a plurality of side surfaces on the side surface. Bracket mounting slits are provided at predetermined intervals along the longitudinal direction, and an extension strut having an insertion portion at a lower end fitted into an upper end opening of the strut, and an extension strut having an insertion portion fitted into an upper opening. Is provided in the bracket mounting slit of the extended strut and is provided with an engaging tool that engages the extension strut to engage the strut and the extension strut with each other. By installing it at the connection part with, you can easily install the extension support so that the extension support will not come off,
The extension prop can be easily removed by removing the post and the engagement tool engaged with the extension prop, and the extension prop can be easily attached and detached according to the usage situation. Is something that can be done.

According to the second aspect of the present invention, the engagement tool inserted into the bracket mounting slit of the column is:
Since it also engages with the engaging slit provided in the insertion portion of the extension strut corresponding to the position of the bracket mounting slit provided on the strut, it is possible to use Is engaged by engaging a bracket mounting slit provided on the support pillar and an engaging slit provided on the insertion portion of the extension support pillar with an engaging tool. The engagement tool engages with the slit and the engagement slit so that the support pillar and the extension support pillar are connected to each other, so that the support tool and the extension support pillar do not have to be perforated at the time of connection. The connection of the extension columns can be done by removing the engagement tool without leaving any trace of the connection of the coupling tool such as a screw on the pole or the extension column. Is

Further, in the third aspect of the present invention, the engagement tool is composed of an insertion tool to be inserted into the bracket mounting slit of the column and a fixing tool for holding and fixing the insertion tool. Since the fixture has a tightening screw, and the fixture has a screw hole into which the tightening screw is screwed and an engaging hole that is inserted and engaged with the tip of the insertion side protruding from the bracket mounting slit, tighten the tightening screw. It is possible to connect the support pillar and the extension support pillar with the engaging tool so that the connection portion between the support pillar and the extension support pillar is held by the engagement.
It is possible to easily and firmly connect the support column and the extension support column only by tightening the tightening screw without the need for a work for drilling a hole into the support column or a tool or the like.

Further, according to a fourth aspect of the present invention, the engagement tool is an engagement tool half body which is disposed over the support pillar and the extension support pillar on one side of the connecting portion between the support pillar and the extension support pillar.
The other side surface of the connecting portion between the support column and the extension support column is composed of a support column and an engaging tool half body arranged over the extension support column in one side, one engaging tool half body having a tightening screw, and the other engagement The tool half has a screw hole into which a tightening screw is screwed, and each engaging tool half is inserted into the bracket mounting slit of the column and the bracket mounting slit of the extension column to attach the column and the extension column. Since it has an insertion protrusion to be coupled with each other, the bracket and the extension strut are engaged with each other by using the bracket mounting slit provided on the strut and the bracket mounting slit provided on the extension strut. Can be connected and fixed, and can be engaged using bracket mounting slits without separately forming engagement holes or the like for engaging the support column and extension support column with the support tool or extension support column Use a tool to connect the support and extension support. Those which can be mutually coupled.

According to the fifth aspect of the present invention, at least one of the insertion protrusions inserted into the bracket mounting slits of the support pillar or the extension support pillar is inserted into the bracket mounting slit. Since a taper portion is provided for urging the extension strut and the extension strut close to each other, the strut and the extension strut are coupled by urging the strut and the extension strut close to each other by tightening the tightening screw. Therefore, it is possible to reliably connect the support pillar and the extension support pillar to each other without causing a gap between the support pillar and the extension support pillar and rattling them.

Further, in the sixth aspect of the present invention, the engagement tool is engaged with the bracket mounting slit located at the uppermost end of the support column at the lower part of the thin plate inserted into the support column and the extension support column. Since the lower claw is provided and the upper claw that is engaged with the bracket mounting slit located at the lowermost end of the extension column is provided on the upper part of the thin plate, the upper claw is engaged with the bracket mounting slit of the extension column. Also, by engaging the lower claw with the bracket mounting slit of the support, the support and the extension support can be connected, and the support and the extension support can be easily performed without tightening screws. And can be connected.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing an embodiment of the present invention.

FIG. 2 is an exploded perspective view of a main part of the above.

FIG. 3 is a vertical cross-sectional view showing an attached state of an engagement tool.

FIG. 4 is a cross-sectional view showing another attachment state of the engagement tool.

FIG. 5 is a perspective view showing a state in which extension columns are not attached.

FIG. 6 is an exploded perspective view showing another embodiment.

FIG. 7 is a partial perspective view showing a mounting state of the above-mentioned engaging tool.

FIG. 8 is a vertical cross-sectional view showing a mounting state of the engagement tool.

FIG. 9 is a cross-sectional view showing another attachment state of the engagement tool.

FIG. 10 is a vertical cross-sectional view showing a mounting state of the engagement tool in another embodiment.

FIG. 11 is a vertical cross-sectional view showing a mounting state of the engagement tool in still another embodiment.

FIG. 12 is a cross-sectional view showing a state in which an engaging member is attached in still another embodiment.

FIG. 13 is a perspective view showing a state where extension columns are not attached.

FIG. 14 is an exploded perspective view showing still another embodiment.

FIG. 15 is an exploded perspective view of the main part of the above.

16 (a), (b), (c), and (d) are vertical cross-sectional views illustrating the procedure for attaching the engaging tool.

FIG. 17 is a vertical cross-sectional view showing an attached state of the engagement tool.

FIG. 18 is a partial cross-sectional view illustrating the operation of the engagement tool.

FIG. 19 is a perspective view showing a state where extension columns are not attached.

FIG. 20 is an exploded perspective view of a conventional example.

[Explanation of symbols]

 1 Bracket Mounting Slit 2 Strut 3 Bracket Mounting Slit 4 Upper End Opening 5 Insertion Part 6 Extension Strut 7 Engaging Tool 8 Engaging Slit 9 Inserting Tool 10 Fixing Tool 11 Tightening Screw 12 Screw Hole 13 Engaging Hole 14 Engaging Tool Half body 15 Engagement tool half body 16 Insertion protrusion 17 Tapered portion 18 Thin plate 19 Lower claw 20 Upper claw

Claims (6)

[Claims] 1. A pillar having a hollow prismatic shape and a plurality of bracket mounting slits provided on the side surface at predetermined intervals along the longitudinal direction, and a hollow prismatic pillar having a plurality of bracket mounting slits on the side surface in the longitudinal direction. Along with a predetermined interval, the lower end of the extension column having an insertion portion to be fitted into the upper end opening of the column, and the bracket of the column column having the extension column extended by inserting the insertion portion into the upper end opening. A fixture, comprising: an engaging member that is inserted into the mounting slit and that engages with the extension strut to engage the strut and the extension strut with each other. 2. The engagement tool inserted into the bracket mounting slit of the column also corresponds to the position of the bracket mounting slit provided in the column, and also in the engagement slit provided in the insertion portion of the extension column. The furniture according to claim 1, wherein the furniture is adapted to be engaged. 3. The engagement tool comprises an insertion tool to be inserted into a bracket mounting slit of a column and a fixing tool for holding and fixing the insertion tool, the insertion tool having a tightening screw, and the fixing tool having a tightening screw. 3. The fixture according to claim 2, further comprising: a screw hole into which is screwed, and an engagement hole that is inserted into and engaged with a tip of the insertion side protruding from the bracket mounting slit. 4. The engagement tool includes an engagement tool half body disposed on one side of the connecting portion between the support column and the extension support column and the other side surface of the connection portion between the support column and the extension support column. In the girder, it comprises a strut and an engaging tool half arranged over the extension strut, one engaging tool half is provided with a tightening screw, and the other engaging tool half is screwed with the tightening screw. Each of the engaging tool halves has a screw hole, and each engaging tool half includes an insertion protrusion that is inserted into the bracket mounting slit of the support pillar and the bracket mounting slit of the extension support pillar to connect the support pillar and the extension support pillar to each other. The furniture according to claim 1, wherein: 5. A force is applied to at least one of the insertion protrusions inserted into the bracket mounting slits of the support column or the extension support column in a direction in which the support column and the extension support column are brought close to each other as they are inserted into the bracket mounting slit. The furniture according to claim 4, wherein a taper portion is provided. 6. The engagement tool comprises a support and a lower tab of a thin plate inserted into the extension support, and a lower claw engaged with a bracket mounting slit located at an uppermost end of the support. The fixture according to claim 1, further comprising an upper claw engaged with a bracket mounting slit located at a lowermost end of the column.