JPH06142986A - Device for clamping shapes - Google Patents

Abstract

PURPOSE:To obtain a small shapes clamping device which can firmly clamp an end part of a shapes in a short time, and can keep it constant by repeating a clamping state of a relative position and an attitude, etc., of the shapes and the clamping device. CONSTITUTION:The clamping device 10 is to clamp an end part of a shapes, and composed by providing a fixed clamping arm 141 brought in contact with, at least, two surfaces of the shapes corner, and a pair of movable clamping arms 142, 143 formed freely approaching and separating facing toward each corner abutting surfaces of this fixed clamping arm 141. The position and the attitude can be kept constant by matching the corner of the shapes to the arm 141 and clamping it with two movable clamping arms 142, 143.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shaped steel clamp device, and more particularly to a shaped steel clamp device suitable for being applied to a positioner which assists a welding operation by clamping a beam portion of a steel structure joint for construction. .

[0002]

2. Description of the Related Art Generally, at the joints between columns and beams of buildings,
As shown in FIG. 5, a steel frame joint 3 in which an H-shaped steel 2 serving as a connecting portion with a beam is welded to the side surface of a column 1 formed of a square pipe joined to a column is used. Such steel frame joints 3 are often welded in advance at the factory. In this case, the H-shaped steel 2 is temporarily welded to the column 1 and then the crane 3 is lifted and held by a crane and the joint 3 is inverted. The main welding is carried out while doing.

[0003] Such a crane hoisting system has a joint 3
Since it is difficult to stably maintain
A positioner as shown in -137597 has been proposed. This positioner has a cross-shaped steel joint 3
H-shaped steel 4 along one axis in Fig. 4, especially the web 5 at both ends
A fixing jig is attached to each part, and the jig is chucked to be rotatably held and rotated by a motor. Further, Japanese Utility Model Laid-Open No. 62-10987 proposes that the H-shaped steel in the steel frame joint 3, particularly the flange 6 portion, is clamped and held in a cantilever manner so that it can be vertically swung and rotated. There is. FIG. 6 (1) shows the former structure for clamping the web portion, and FIG. 6 shows the latter structure for clamping the flange portion.
It is schematically shown in (2).

[0004]

However, in the former case, when it is applied to a position welding welding joint positioner which keeps the clamped state such as the relative position and posture of the shaped steel and the clamp device repeatedly constant, the clamper clamps. Since it is necessary to manually determine the position and orientation of the shaped steel by manual work or a method instead of it, there is a problem that the clamping work itself takes time. Further, in the latter clamp device, since the height of the web 5 varies depending on the shape steel 4, it is necessary to increase the stroke of the clamp arm, which causes a drawback that the clamp device becomes large. In addition, as in the former case, when applying to a position welding work positioner that keeps the clamped state constant, the position and posture of the shaped steel is determined by manual work or an alternative method before clamping. Therefore, there is a problem that the clamp work itself takes time.

Instead of this, as shown in FIG.
It is also proposed to clamp the web 5 and the flange 6 by sandwiching them from two directions at the same time (Japanese Patent Laid-Open No. 60-805).
36). In this case, the clamped state such as the relative position and posture of the shaped steel and the clamp device can be repeatedly kept constant, but since the flange 6 part is sandwiched, it is necessary to correspond to various heights of the web 5, and the clamp arm The stroke must be increased, which causes a problem of increasing the size of the clamp device itself.

In view of the above-mentioned conventional problems, the present invention can clamp the end portion of the shaped steel firmly and in a short time, and repeats the clamped state such as the relative position and posture of the shaped steel and the clamping device. An object of the present invention is to provide a compact shaped steel clamp device that can be kept constant.

[0007]

In order to achieve the above-mentioned object, a shaped steel clamping device according to the present invention is a clamping device for gripping an end portion of a shaped steel, and at least two surfaces of the shaped steel corner are contacted. A fixed gripping arm that is in contact with the fixed gripping arm and a pair of movable gripping arms that are formed so as to face each corner contact surface of the fixed gripping arm so as to be able to come into contact with and separate from each other are provided.

[0008]

According to the above construction, the fixed gripping arm is abutted against the two surfaces of the corner portion of the shaped steel, and the movable gripping arm is pressed toward the respective contact surfaces of the fixed gripping arm. Accordingly, in the case of H-section steel, the T-shaped portion formed by the flange portion and the web portion can be held by being sandwiched by the three gripping arms. Therefore, it is not necessary to adjust the position and orientation of the shaped steel before clamping, and it is possible to pinch both the web part and the flange part with a small stroke, which can be repeatedly clamped in a short time while maintaining a constant clamped state. It can be clamped.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Specific embodiments of the shaped steel clamp device according to the present invention will be described in detail below with reference to the drawings.

1 and 2 show a clamp device 1 according to an embodiment.
0 is shown. As shown in these drawings, the clamp device 10 includes a base plate 12 attached to a rotating disk described later, and the base plate 12 is shown in FIG.
The three arms 141 to 143 for holding the ends of the H-shaped steel 4 constituting the beam portion of the steel frame joint portion 3 shown in FIG. 3 are attached in a state of vertically extending from the surface portion of the base plate 12. .

First, the first gripping arm 141 functions as a fixed guide arm for positioning by contacting one corner portion formed by the web 5 of the H-shaped steel 4 and the flange 6 in the joint portion 3. Therefore base plate 1
It is fixedly projected at a fixed position of 2. Therefore, the first
The gripping arm 141 is provided with a web contact surface 16W and a flange contact surface 16F, which are brought into direct contact with the corner portion of the H-shaped steel 4 to determine the holding position. The second gripping arm 142 is arranged horizontally opposed to the first gripping arm 141 and presses another corner portion formed by the web 5 of the H-shaped steel 4 and the flange 6 in the joint portion 3, It is configured as a movable gripping arm capable of sandwiching the web 5. Further, the third gripping arm 143 is arranged so as to be able to press the outer surface of the flange 6 of the H-shaped steel 4 at right angles to the sandwiching direction by the first and second gripping arms 141, 142, whereby the flange 6
Is pressed against the upper surface of the gripping arm 141.

By the way, the second and third movable gripping arms 142 and 143 for pressing and sandwiching the H-shaped steel 4 against the first gripping arm 141 are each equipped with a hydraulic cylinder mechanism, as shown in the drawing. , 2 hydraulic cylinders 18 each
Are arranged in parallel in a direction perpendicular to the plane of the base plate 12 so that they can be held in a cantilever manner by being pressed at two positions in the longitudinal direction of the steel frame joint portion 3. That is, the movable mechanism of the second and third gripping arms 142 and 143 is the hydraulic cylinder mechanism 1.
It is constituted by the rod 20 of No. 8 and the joint portion 3 is clamped or released by its stroke. Further, as can be understood from FIG. 2, the second and third gripping arms 142 and 143 are swingably attached to the bracket 22 fixed to the base plate 12 via pivot pins 24. The pivot pin 24 is set at a position near the pressing surface on the proximal end side of each of the second and third gripping arms 142 and 143, and the gripping arm 14 is moved by the reaction force of the gripping force.
2, 143 are designed to be rotated. Then, in order to support the reaction force by the base plate 12, a reaction force transmission spacer 26 is interposed between the second and third gripping arms 142, 143 and the base plate 12 side bracket 22.

In the clamp device 10 constructed as described above, the T-shaped portion of the H-shaped steel 4 is provided with the three holding arms 141, 1 and 1.
Insert it in the gap between 42 and 143. After that, by applying hydraulic pressure to the hydraulic cylinder mechanisms 18 of the second and third gripping arms 142 and 143, the rod 20 expands, and these cause the web 5 and the flange 6 to contact the web contact surface 16W of the fixed gripping arm 141. It can be pressed against the flange contact surface 16F and firmly pinched. The sandwiching reaction force generated by the hydraulic pressure causes the second and third gripping arms 142 and 143 to rotate around the pivot pin 24. However, as shown in FIG. 3, the spacer 26 supports the reaction force, and the spacer 26 supports the base plate 12 side. introduce. As a result, the H-shaped steel 4 is pressure-bonded to the position with reference to the two side surfaces of the first gripping arm 141, and is fixedly held while determining the position and posture.

The clamp device 10 according to this embodiment can clamp the H-shaped steel 4 of various heights, and at the same time, can determine the position and the posture, and is constructed in a relatively small size. It can be used as a positioner for an automatic welding device for the mouth 3. FIG. 4 shows an example in which the standing frame 3 of the positioner body 30 is used as a positioner.
The clamp device 10 is attached to the rotary disk 34 attached to the No. 2 disc. Rotate the clamp device 10 to the rotating disk 3
It is attached so as to be deviated from the rotation center of No. 4, and the end portion of the beam portion of the steel frame joint portion 3 is gripped by the clamp device 10. The clamp device 10 stops the rotation of the joint portion 3, and the welding robot 36 welds a predetermined welding line at each stop position.

In the above embodiment, the movable gripping arms 142 and 143 are configured to be clamped by the hydraulic cylinder 18, but the movable gripping arms 142 and 143 are configured to move for clamping. Alternatively, instead of the hydraulic cylinder 18, a mechanism such as a ball screw may be used.

According to this embodiment, the cross, T-shaped portion or L-shaped portion forming the corner of the shaped steel is fastened from three sides by the three gripping arms 14, and the thick portion of the shaped steel is used. Since it is a configuration that only sandwiches, the change in wall thickness itself is small even if the shape steel size is changed,
Even if the stroke of the gripping arm 14 is small, it can be applied to various shaped steels. Further, it is possible to hold the shaped steel in an appropriate position and posture without manually determining the position and posture of the shaped steel before clamping, and it is possible to repeatedly hold the clamped state constant. Further, although the clamping force is performed by the hydraulic cylinder mechanism, the movable gripping arm 14
Since the reaction force is transmitted to the side of the base plate 12 by rotating the pins 2 and 143 about the pivot pin 24, the small hydraulic cylinder mechanism can firmly grip them. Therefore, even if the cross-sectional area of the gripping arm 14 is large, the overall size of the clamp device 10 can be reduced, and the clamping reaction force can be dispersed, so that sufficient strength can be provided even if the cross-sectional area of the gripping arm 14 is relatively small. it can.

[0017]

As described above, the shaped steel clamp device according to the present invention is a clamping device for gripping the end of a shaped steel, and is a fixed gripping arm that abuts at least two surfaces of the shaped steel corner. And a pair of movable gripping arms that are formed so as to be able to come into contact with and separate from each corner contact surface of the fixed gripping arm, the end portion of the shaped steel can be firmly and quickly formed. There is an effect that it is possible to obtain a small shaped steel clamping device that can be clamped and can keep the clamped state such as the relative position and posture between the shaped steel and the clamping device repeatedly and constantly.

[Brief description of drawings]

FIG. 1 is a front view and a schematic view of a clamp device according to an embodiment.

FIG. 2 is a side view and a bottom view of the clamp device according to the embodiment.

FIG. 3 is an explanatory diagram of a clamped state.

FIG. 4 is a side view applied to a finisher positioner.

FIG. 5 is a perspective view of a steel frame joint portion.

FIG. 6 is a schematic diagram of a mechanism of a conventional clamp device.

[Explanation of symbols]

 10 Clamping device 12 Base plate 141 Fixed gripping arms 142, 143 Movable gripping arm 16W Web contact surface 16F Flange contact surface 18 Hydraulic cylinder 20 Rod 22 Bracket 24 Pivot pin 26 Reaction force transmission spacer

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hideaki Tachibana 1200 Manda, Hiratsuka City, Kanagawa Prefecture Komatsu Seisakusho Laboratory (72) Inventor Tatsu Okabe 1200, Hiratsuka City, Kanagawa Prefecture Komatsu Seisakusho Co., Ltd.

Claims (1)

[Claims] 1. A clamp device for gripping an end portion of a shaped steel, comprising a fixed gripping arm that is in contact with at least two surfaces of a shaped steel corner, and a corner contacting surface of each of the fixed gripping arms. A shaped steel clamp device comprising a pair of movable gripping arms that are formed so as to be able to come into contact with and separate from each other.