JP3283103B2 - bar - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a crowbar mainly used for two- or three-story construction work of a lightweight steel structure.

[0002]

2. Description of the Related Art In the case of constructing a two- or three-story building having a lightweight steel structure, the outline of the steps required for the present invention is as follows. First, a cloth foundation is laid, and a base is placed on the cloth foundation. Mounted,
Erect steel columns on the base. Next, beams are erected between the reinforced columns, but since the reinforced columns are erected at intervals substantially matching the length of the beams, the beams can be easily inserted between the reinforced columns as they are The beam is suspended by a crane, and a few workers support the beam in place.
A human worker rides on an unstable scaffold or another beam already attached, inserts a conventional bar between the reinforced pillar and the beam, forcibly bends the reinforced pillar, and creates a gap between the two, The other one is performing a very dangerous work of sifting the hammer, forcing the beam between the reinforced columns, and finally pressing the beam between the reinforced columns and fixing them with bolts. Was.

[Problems to be solved by the invention]

[0003] The present invention has been made in view of the related art, and the problem to be solved by the present invention is to make it possible to easily and safely insert and fix a beam between reinforced columns with a minimum number of workers. It is to do.

[0004]

The crowbar (A) of the present invention has been made in order to achieve the above-mentioned object. In claim 1, the crowbar (A) is used when a beam (5) is installed between columns (4). Bur
(A), a rotating shaft (2) inserted into a through hole (6) formed in a pillar (4), and a burl body (1) that rotates together with the rotating shaft (2).
And a roller mounting arm (7) protruding from the burl body (1) toward the end surface (5a) of the beam (5), and a tip of the roller mounting arm (7).
In the direction perpendicular to the rotation axis (2) in the longitudinal direction of the pillar (4) at the end
Install the roller mounting shaft (7a) and the roller mounting shaft (7a).
And a roller (3) rotating in parallel with the moving direction of the beam (5) in contact with the end surface (5a) of the beam (5). "

Accordingly, one end of the beam (5) is lightly bolted to one of the columns (4), and the rotary shaft (2) of the crowbar (A) is inserted into the through hole (6) of the other column (4). When the roller (3) comes into contact with the end surface (5a) of the beam (5) and the crowbar body (1) is rotated, the lever
(4) is slightly curved, and a gap (t) is formed between the column (4) and the beam (5). When the beam (5) is pushed toward the column (4) in this state, `` or the beam
The beam (5) is easily moved between the columns (4) by the action of the roller (3) and fitted, and the bolt is fixed. Will be. Like this
By cooperating with the "lever action" of (A) and the "rotation action" of the roller (3) at the tip, the beam (5) can be easily and safely fitted between the columns (4).

According to a second aspect of the present invention, there is provided a burl which is an improvement of the first aspect, wherein a roller mounting arm in which the roller (3) swings in the axial direction of the roller (3) with respect to the rotation direction of the roller (3). (7) attached to the burl body (1). " As a result, the roller mounting arm
(7) and the mounting angle of the crowbar body (1) (i.e., the direction in which the roller mounting arm (7) moves away from the rotating shaft (2)) changes, but the roller mounting arm (7) swings its head. The roller (3) always comes into contact with the end face (5a) of the beam (5) accurately, and the roller (3) comes into accurate contact with the end face (5a) of the beam (5). In this state, the beam (5) can be moved to the column (4) side.

A third aspect of the present invention is a further improvement of the second aspect, in which a roller mounting arm (7) with respect to the rotating shaft (2) is biased in the direction of the rotating shaft (2). A resilient member (8) is installed on the opposite side of the above. " Thus, the roller (3) is always positioned on the rotating shaft (2) side, and in this state, comes into contact with the end surface (5a) of the beam (5). Then, operate the burl body (1) to rotate the burl body around the rotation axis (2).
When (1) is rotated, the roller mounting arm (7) swings in the direction in which the roller (3) moves away from the rotating shaft (2) with the rotation.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The most preferred embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a front view of the burl (A), and FIG. 2 is a plan view of the burl (A). The burl body (1) is composed of a mounting part body (9) having mounting parts (9a) and (9b) extending in two directions, and a lever (10) integrally mounted on the mounting part body (9). I have. The rotating shaft (2) is inserted at a right angle into one mounting portion (9a) of the mounting portion main body (9), and the rotating shaft (2) protrudes on both sides of the mounting portion (9a).

A roller mounting arm (7) is swingably mounted on the other mounting portion (9b) of the mounting portion body (9).
(7c) is an arm mounting shaft. The roller mounting arm (7) is attached to the burl body (1) so that the swing direction of the arm is in the axial direction of the roller (3). Rollers (3) and (3) are disposed on both sides of the distal end of the roller mounting arm (7) with the distal end portion interposed therebetween, and are rotatably held by a roller mounting shaft (7a). (11) is a washer interposed between the roller (3) and the roller mounting arm (7). In this embodiment, the roller mounting shaft (7a) is constituted by bolts,
It is fixed at (7b), but is not limited to this.

[0010] (8) is a resilient member, in this embodiment a leaf spring is used. Place the spring member (8) on the roller (3)
Is a surface on the opposite side of the roller mounting arm (7) with respect to the rotating shaft (2) so as to be biased in the direction of the rotating shaft (2). In the above-described embodiment, an example of the leaf spring is shown as an example of the resilient member (8). However, a material other than the spring, such as a torsion coil spring, which can achieve the above function can be used.

After one end of the beam (5) suspended by a crane is lightly bolted to one of the reinforced columns (4) erected at predetermined intervals on the base, the beam (5) is horizontally moved. keep. Next, insert one rotating shaft (2) of the crowbar (A) into the through hole (6) of the other reinforced pillar (4), and attach the roller (3) to the beam (5), which is free and not bolted. Contact the end face (5a)
Hold (10) and rotate the burl body (1) clockwise in the figure. Then, the roller (3) strongly presses the end surface (5a) of the beam (5) about the rotation axis (2), and at this time, the reinforced pillar (4) is slightly curved by `` lever action '', A gap (t) is formed between the reinforced pillar (4) and the beam (5).

At this time, the mounting angle between the roller mounting arm (7) and the burl body (1) changes in accordance with the "lever action", and the roller (3) gradually moves away from the rotary shaft (2). Since the roller mounting arm (7) swings its head, the roller (3) always comes into accurate contact with the end face (5a) of the beam (5). In this state, when another worker pushes the beam (5) toward the reinforced column (4), the beam (5) easily moves between the reinforced columns (4) and (4) by the action of the roller (3). Fits, finally through holes in reinforced columns (4) and beams (5)
Match (6) and fix with bolts. Thus, the crowbar (A)
The beam (5) can be easily and safely fitted and fixed between the reinforced pillars (4) and (4) by the cooperation of the "lever action" of the tip and the "rotation action" of the roller (3) at the tip with the minimum number of workers. You can do it. In addition,
When the beam (5) is inserted between the reinforced columns (4) and (4), the beam (5) is inclined with respect to the reinforced column (4) in the plan view as shown in FIG.
Depending on the relationship with the contact point of the roller (3) in contact with the end surface (5a) of (5), the component force in the direction parallel to the end surface (5a) of the force pressing on the end surface (5a) is a beam (5). Is the force to move the beam (5) in the direction of the reinforced pillar (4) .In this case, when the lever (10) is actuated and the leverage action is applied, the beam (5) is automatically Four)
(4) You will slip in between.

As described above, since the roller (3) urges the resilient member (8) in the direction of the rotating shaft (2), the crowbar (A)
When the roller (3) is in a free state where it does not contact the end face (5a) of the beam (5) at the beginning of use, the roller (3) is held in the state closest to the rotating shaft (2). The roller (3) is always in contact with the end surface (5a) of the beam (5) in the initial state. Thereafter, when the lever (10) is operated as described above, the roller mounting arm (7) rotates against the resilient member (8) by "lever action". This allows
The roller (3) does not sway at the beginning of use of (A) and is easy to use.
Further, since the contact position of the roller (3) with the beam end surface (5a) at the beginning of use is always constant, the "lever action" can be exerted in the same state at all times. When the lever (10) is operated to rotate the crowbar body (1) clockwise around the rotating shaft (2) as shown in the figure, the roller mounting arm (7) separates from the rotating shaft (2). Although it moves in the going direction, a sufficient stroke can be taken because the roller (3) is shifted toward the rotating shaft (2) by the resilient member (8). Since the rotating shaft (2) protrudes on both sides, it can be used not only on the front side of the reinforced pillar (4) but also on the back side as shown in FIG.

In the above embodiment, only the case where the roller (3) is mounted on the roller mounting arm (7) and urged in one direction by the resilient member (8) is shown. In the case where the resilient member (8) is not provided as described above, the case where the roller (3) is directly installed on the mounting portion main body (1) as in claim 1, all other items corresponding to the respective claims are used. Needless to say.

According to the first aspect of the present invention, there is provided a rotating shaft inserted into a through hole formed in a pillar, a burl body rotating together with the rotating shaft, and a bar projecting from the burl body toward an end face of the beam. And a roller that rotates in parallel with the direction of movement of the beam in contact with the end face of the beam, so that the beam is erected between the columns, one end of the beam is lightly bolted to one column, and the through hole of the other column By inserting the rotating shaft of the crowbar into the bar and rotating the crowbar body with the roller in contact with the end face of the beam, the pillar is easily curved by "leverage action" to form a gap between the pillar and the beam. Then, in this state, by pushing the beam to the column side, there is an advantage that the beam can be easily moved between the columns by the action of the roller and erected. The crowbar according to claim 2 is an improvement of claim 1, in which the roller is mounted on the crowbar body by a roller mounting arm that swings in the axial direction of the roller. The roller always comes into contact with the end face of the beam accurately even if the mounting angle between the beam and the crowbar body is changed, and the beam is moved to the column side with the roller exactly in contact with the end face of the beam. The advantage is that you can do things. The third aspect is a further improvement of the second aspect, in which a resilient member is provided on a surface opposite to the roller mounting arm with respect to the rotating shaft so that the roller is biased in the rotating shaft direction. The roller is always located on the rotating shaft side. As a result, the beam always comes into contact with the end face at the same position, and there is an advantage that the "lever action" can be always exerted in the same state. In addition, since the roller mounting arm is fixed with a resilient member, it is easy to use because the roller does not wobble at the beginning of use of the crowbar, or when the crowbar body is rotated around the rotation axis by operating the lever There is an advantage that the stroke can be sufficiently taken because the roller is shifted toward the rotation shaft.

[Brief description of the drawings]

FIG. 1 is a front view of one embodiment of a burl according to the present invention.

FIG. 2 is a plan view of the burl of FIG. 1;

FIG. 3 is a schematic front view of a construction site to which the bar of the present invention is applied.

FIG. 4 is a front view when the crowbar of the present invention is used.

FIG. 5 is a plan view of FIG. 4;

[Explanation of symbols]

 (A)… Burl (1)… Burl body (2)… Rotating axis (3)… Roller (4)… Column (5)… Beam (5a)… Beam end (6)… Through hole

Claims (3)

(57) [Claims] 1. A burl used for erection of a beam between columns, comprising a rotating shaft inserted into a through hole formed in the column, a burl body rotating with the rotating shaft, and a beam from the burl body. A roller mounting arm protruding toward the end face of the
At the tip of the roller mounting arm, with the rotation axis in the longitudinal direction of the pillar
A roller mounting shaft arranged in a direction orthogonal to
A crowbar comprising a roller attached to a shaft and rotating in parallel with a moving direction of the beam in contact with an end surface of the beam. 2. The crowbar according to claim 1, wherein the roller is mounted on the crowbar body by a roller mounting arm that swings in the axial direction of the roller. 3. A resilient member is provided on a surface opposite to the roller mounting arm with respect to the rotation shaft so that the roller is urged in the rotation shaft direction. A crowbar according to item 2.