JP2661501B2 - Standing member mounting structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an erecting member mounting structure applied to a so-called perch type chair when an elbow support is erected on a beam.

[0002]

2. Description of the Related Art As the above-mentioned chair, there is known a chair in which a plurality of chair bodies are mounted on a beam laid on a floor via legs. In such a chair, an elbow support, which is a standing member, is often provided upright at a portion of the beam located between the chair bodies.

Conventionally, when such an elbow support is mounted on a beam, a concave portion is provided at the lower end of the elbow support, into which the beam fits, and a downward-facing surface is formed on both sides of the concave portion. Both ends of the attached metal fittings are tightly fastened to the corresponding downward surfaces using bolts.

[0004]

However, in such a structure, it is necessary to bolt two parts of the fixing bracket. Therefore, when a large number of chair bodies and elbow supports need to be attached to the beam, such as a grandstand, there is a problem that a large number of assembling man-hours are required, and the construction takes time and effort.

[0005] An object of the present invention is to solve such a problem.

[0006]

In order to achieve the above object, the present invention takes the following measures.

That is, the upright member mounting structure according to the present invention is for erection of an upright member on a horizontally laid beam, and has a concave portion into which the beam is fitted at the lower end of the upright member. One inner surface of the recess extends below the lower surface of the beam to form an engagement recess in the extension, and a downward surface is provided adjacent to the other inner surface to provide a lower surface of the beam. And one end of the fixing bracket abutted on the lower surface is fastened to the downwardly facing surface by a fastener.

In order to make the mounting state more reliable, it is effective to form a step between one end and the other end of the fixture so as to closely contact the side surface of the beam.

[0009]

In such a configuration, the beam is fitted into the concave portion of the upright member, the fixing bracket is brought into contact with the lower surface of the beam, and one end thereof is engaged with the engaging recess of the upright member.
When the other end is brought into contact with the downward surface of the upright member and fastened by the tightening tool, the fixing bracket is tightened and fixed to the lower end of the upright member with the beam held between the upright and the concave portion. In this state, one end of the fixture is engaged with the engagement recess,
The fixture does not fall out of the engagement recess unless the fastener is loosened again. And since the recessed part and the fixture are integrated to tightly surround the periphery of the beam, the entire upright member cannot move with respect to the beam. In this way, the upright member mounting structure of the present invention can securely mount the entire upright member to the beam while using the fastener only on the other end of the fixing bracket.

In the case where a step is formed between one end and the other end of the fixture so as to closely contact the side surface of the beam, first, one end of the fixture is engaged with the engagement recess,
In this state, the other end is fastened to the downward surface by using a fastener, whereby the beam is relatively biased toward one inner side of the recess by the tightening force, and the degree of close contact between the beam and the recess is obtained. Will be gradually increased. Therefore, rattling of the entire upright member with respect to the beam can be effectively prevented without forcibly increasing the fitting accuracy of the beam and the recessed portion.

[0011]

An embodiment of the present invention will be described below with reference to the drawings.

This upright member mounting structure is applied to, for example, an elbow support 2 attached to a perch type chair 1 shown in FIG. 1, and the elbow support 2 is attached to a beam 3 by using a fixture 4 and a bolt 5. It is to be fixed upright.

The beam 3 is laid in parallel with the floor F via legs (not shown).

The elbow supports 2 are fixed on the beam 1 at predetermined intervals, and the chair 1 is pivotally supported between the pair of elbow supports 2. Specifically, as shown in FIGS. 2 and 3, a pair of base end portions 2 are provided at a lower end 2a at a predetermined distance.
1 and 22 are protruded, and a concave portion 2
3 is formed. The inner surfaces 21a, 2
The distance between 2a substantially corresponds to the width dimension of the beam 3,
The beam 3 can be fitted between the inner surfaces 21a and 22a. The inner surface 21a of the one base end 21 is set so as to extend below the lower surface 3a of the beam 3 with the beam 3 fitted therein (see FIG. 7). A rectangular slit 21b, which is an engagement recess, for opening the corresponding one end 4a of the fixture 4 to the corresponding inner surface 21a is opened. 3 and 4, the lower end of the other base end portion 22 is partially cut away to form a hollow portion 22e surrounded by the wall portions 22b, 22c, and 22d, and has no wall portion. The part is open to the concave part 23 side. The upper wall 22f of the hollow portion 22e forms the downward surface of the present invention. A screw hole 22g is formed in the downward surface 22f.

On the other hand, as shown in FIGS. 5 and 6, the fixing bracket is formed by pressing a sheet metal material into one end 4a.
FIG. 7 is a diagram in which a step portion 41 is formed between the other end 4b and one end 4a is inserted into and engaged with the slit 21b.
, The surface 42 on one end 4a side of the step portion 41 faces the lower surface 3a of the beam 3, the step portion 41 faces the side surface 3b of the beam 3, and the surface on the other end 4b side of the step portion 41. 43
Are set to be able to face the downward surface 22f of the elbow support 2, respectively. At this position, a bolt insertion hole 44 that is continuous with the screw hole 22g of the downward facing surface 22f is formed in the fixing bracket 4.

Next, a procedure for attaching the elbow support 2 to the beam 3 in this embodiment will be described. First, as shown by an imaginary line in FIG. 7, the concave portion 23 of the elbow support 2 is fitted into the beam 3, and one end 4 a of the fixing bracket 4 is connected to the slit 2 of the elbow support 2.
When the other end 4b is rotated in the direction of the arrow while obliquely penetrating the lower end 1b of the beam 3, the surface 42 of the fixture 4
, The step portion 41 approaches the side surface 3 b of the beam 3, and the surface 43 approaches the downward surface 22 f of the elbow support 2. Then, the bolt 5 inserted from below into the bolt insertion hole 44 of the fixture 4
Into the screw hole 22g of the elbow support 2. As a result, the surface 42 of the fixture 4 is attached to the lower surface 3 a of the beam 3, the step 41 is attached to the side surface 3 b of the beam 3, and the surface 43 is attached to the downward surface 22 f of the elbow support 2. Particularly, since the step portion 41 is set so as to be closely attached to the side surface 3 b of the beam 3, the beam 3 relatively moves as the bolt 5 is screwed into the screw hole 22 g. The beam 3 is biased toward the side 21a, and the degree of close contact between the beam 3 and one side surface 21a of the recess 23 is gradually increased. Then, at a stage where a predetermined tightening force is applied, the fixing bracket 4 is tightly fixed to the lower end of the elbow support 2 by the bolt 5 while the beam 3 is held between the fixing bracket 4 and the recessed portion 23 (see FIG. 8). In this state, one end 4a of the fixing member 4 is engaged with the slit 21b.
Cannot fall off the slit 21b. Then, since the recess 23 and the fixing bracket 4 are integrated and tightly surround the periphery of the beam 3, the entire elbow support 2 cannot move with respect to the beam 3.

As described above, the elbow support mounting structure of the present embodiment has a structure in which the other end 4b side of the fixing bracket 4 is simply fastened with one bolt 5, but the entire elbow support 2 is a beam 3.
Can be surely attached. Therefore, when a large number of elbow supports 2 need to be attached to the beam 3 as in a grandstand or the like, the number of assembly steps can be reduced, and the labor and time required for construction can be significantly reduced. Also, the fixing bracket 4
Of the beam 3 is closely attached to the side surface 3b of the beam 3, so that the degree of fitting between the beam 3 and the recessed portion 23 can be reduced at the mounting stage without forcibly increasing the fitting accuracy at the working stage. 4
1 can be used to increase and effectively prevent rattling. Therefore, the attachment state of the elbow support 2 can be made more reliable without impairing the easiness of processing and construction.

The specific configuration of each part is not limited to the illustrated example, and various modifications can be made without departing from the spirit of the present invention. For example, as shown in FIG. 9, when the step 141 of the fixing bracket 104 is formed in a Z-shape that bends at an acute angle, the tightening force when tightening the bolt is reduced.
It can be effectively converted by the pressing force of 41 on the beam side surface 3b (in the direction of the arrow in the figure). Therefore, it is effective to more strongly fit the beam into the recess.
Of course, a flat metal fitting having no step also belongs to the technical scope of the present invention. Further, in the above embodiment, the present invention is applied to the mounting of the elbow support, but can be applied to the mounting of the chair of the present embodiment and any other upright members.

[0019]

As described above, according to the upright member mounting structure of the present invention, the recess provided at the lower end of the upright member is fitted to the beam, and in this state, the recess is provided on one inner surface of the recess. Attachment of one end of the fixture to the concave portion and fastening of the other end of the fixture to the downward surface of the upright member can complete the mounting of the upright member to the beam. Therefore, it is only necessary to bolt one place of the fixing bracket, and when many chair bodies and elbow supports need to be attached to the beam, such as a grandstand, the number of assembly steps is reduced and the construction is required. It is possible to reduce labor and time.

In particular, in the case where the fixing bracket is provided with a step that closely contacts the side surface of the beam, the step and the beam can be attached at the mounting stage without forcibly increasing the fitting accuracy of the beam and the recess at the processing stage. By increasing the degree of engagement with the upright, rattling of the upright member can be more effectively prevented. Therefore, there is an effect that the mounting state of the upright member can be made more reliable without impairing the easiness of processing and construction.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an elbow support attached to one embodiment of the present invention together with a chair.

FIG. 2 is a front view showing the elbow support of the embodiment.

FIG. 3 is a left side view of the same.

FIG. 4 is a bottom view of the same.

FIG. 5 is a front view showing a fixing bracket used in the embodiment.

FIG. 6 is a plan view of the same.

FIG. 7 is a partially broken left side view showing the mounting state of the embodiment.

FIG. 8 is a sectional view taken along line VIII-VIII in FIG. 7;

FIG. 9 is a diagram showing another embodiment of the present invention.

[Explanation of symbols]

 Reference numeral 2: Upright member (elbow support) 2a Lower end 3 Beam 3a Lower surface 3b Side surface 4 Fixing bracket 4a One end 4b Other end 5 Tightening tool (bolt) 21a One inner surface 21b Engagement recess (Slit) 22a ... the other inner surface 22f ... downward surface 23 ... recess 41 ... step

Claims (2)

(57) [Claims] 1. An upright member mounting structure for erecting an upright member on a beam that is laid horizontally, wherein a recessed portion into which the beam is fitted is provided at a lower end of the upstanding member, and one inner surface of the recessed portion is provided. Is extended below the lower surface of the beam to form an engagement recess in the extended portion, and a downwardly facing surface is provided adjacent to the other inner surface, and a fixing bracket attached to the lower surface of the beam. Characterized in that one end of the mounting member is engaged with the engaging recess and the other end is fixed to the downward surface by a fastener. 2. The upright member mounting structure according to claim 1, wherein a step is provided between one end and the other end of the fixture so as to closely contact the side surface of the beam.