JP2546171Y2 - Jack-based straightening machine - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a jack-based straightening machine used for construction work and the like.

[0002]

2. Description of the Related Art Jack base 1 used for construction work, etc.
As shown in FIG. 4, a screw shaft 3 is erected vertically on the upper surface of a base plate 2, and a nut 4 screwed to the screw shaft 3.
Handles 5 are provided on both sides of the screw shaft 3 so that the pipe inserted into the screw shaft 3 with the base plate 2 grounded is supported by a nut 4 so that the pipe can be adjusted vertically.

[0003] By the way, the jack base 1 as described above.
Is fixed on the base plate 2 so that the screw shaft 3 stands upright. However, as shown in FIG. 4, depending on the load during use, installation conditions, and handling conditions, the base plate 2 May be inclined. Therefore, when the base plate 2 is reused after being collected, it is necessary to perform a correction process for returning the base plate 2 by the inclined angle α. Further, the base plate 2 may partially bend for the same reason, and such a bend must be corrected.

[0004]

As described above, since the correction processing of the base plate 2 in the jack base has been conventionally performed manually, not only the processing work takes time and labor, but also the base plate is accurately restored to the original state. There is a problem that can not be returned to.

[0005] Therefore, an object of the present invention is to provide a jack-based straightening machine which can easily and accurately return the inclination or bending generated on the jack-based base plate.

[0006]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention is directed to a jack-base straightening device in which a nut is screwed onto a screw shaft erected on a base plate, and handles are provided on both sides of the nut. Machine, at the axially opposed position of the screw shaft holding member for inserting the screw shaft of the jack base,
A configuration in which a straightening receiving die for supporting the base plate is arranged at right angles to the axis of the screw shaft holding member, and a straightening die for pressing the base plate toward the straightening receiving die is movably arranged at a position facing the straightening receiving die. Is adopted.

[0007]

The screw shaft of the jack base having the base plate inclined or bent is inserted into the screw shaft holding member, and the base plate is opposed to the correction receiving die.

[0008] The axis of the screw shaft held by the screw shaft holding member is perpendicular to the receiving surface of the correction receiving die. In this state, if the correction press die is moved to press the base plate toward the correction receiving die, The base plate is straightened so as to be perpendicular to the axis of the screw shaft, the bending of the base plate is also straightened, and the screw shaft is removed from the holding member after the straightening die retreats to complete the straightening operation.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the accompanying drawings.

As shown in FIGS. 1 to 3, the straightening machine has a horizontal upper table 13 at the upper end between columns 12 erected at four corners on a base frame 11, and an intermediate table between the columns 12. A handle 14 is fixed to a rear portion of the upper table 13 and a pair of wheels 16 is attached to a rear portion of the base frame 11, and the whole is tilted rearward to be freely moved by the wheels 16. Is available.

The intermediate table 14 and the upper table 1
3 are provided with notches 17 and 18 for receiving the screw shaft 3 of the jack base 1 from the front center toward the rear, and a holding member (hereinafter referred to as a holding cylinder) for the screw shaft 3 is provided on the intermediate table 14. 19) is disposed at a position immediately above the notch 17 so as to be rotatable back and forth from an upright state.

The holding cylinder 19 has an inner diameter to which the screw shaft 3 just fits, and horizontal shafts 20, 20 fixed on both sides thereof so as to be coaxial, bearings 21, 21 on the intermediate table 14.
, And the holding cylinder 19 is rotatable in the front-rear direction about the axis of the horizontal shafts 20, 20.

The holding cylinder 19 is held in an arbitrary position by the braking effect of the resistance spring plate 22 acting on one of the horizontal shafts 20.

A notch 18 is provided on the upper table 13.
The correction receiving dies 23 for supporting the base plate 2 of the jack base 1 are located at both sides of the
It is fixed horizontally with an interval for fitting the screw shaft 3 between the opposed side edges.

A portal frame 24 is erected on the upper portion of the upper table 13, and a hydraulic cylinder 2 is mounted on the lower surface of the upper portion of the portal frame 24.
5 is fixed so that it faces downward on the piston rod 26, and a correction press die 27 is attached to the lower end of the rod 26.

The hydraulic cylinder 25 includes a screw shaft holding cylinder 1
When the stand 9 stands upright, the straightening die 27 which is arranged so as to be coaxial with the holding cylinder 19 and is lowered by the extension of the piston rod 26 presses the base plate 2 on the straightening dies 23, 23. .

The correction receiving dies 23, 23 are formed on the support surface of the base plate 2 so that a flat circular shallow curved concave portion having a coaxial shape with the screw shaft 3 has a smaller diameter than the base plate 2. On the base plate pressing surface, a curved convex portion that fits the curved concave portion is formed. When the pressure of the base plate 2 is corrected, a curved shape is added to the base plate 2 by the curved concave portion and the convex portion. By performing shaping,
The right angle and bending of the base plate 2 can be accurately and reliably corrected.

The correction receiving dies 23, 23 and the correction pressing die 2
7 to the base plate 2
May be made to be the yield point of the material, and the shape at the time of pressurization may be completely fixed.

In the case of the drawing, an opening / closing door 28 is provided at a front portion on the upper table 13 in order to ensure the safety of the straightening operation, and while the opening / closing door 28 is open, the operation of the hydraulic cylinder 25 is performed by electrical detection. Is disabled.

The straightening machine according to the present invention has the above-described structure. The jack base 1 for straightening the base plate 2 is turned upside down as shown by a dashed line in FIG. Is inserted into the holding cylinder 19 from above, the screw shaft 3 is rotated backward about the horizontal shafts 20, 20, the upper portion of the screw shaft 3 is advanced into the cutout portions 18 of the upper table 13, and the base plate 2 is Receiving die 2 on both sides
3 and 23.

In this state, the opening / closing door 28 is closed, and hydraulic pressure is supplied to the hydraulic cylinder 25 to lower the correction die 27. As shown in the solid line of FIG. 1 and FIG. 23, 23 is pressed.

The correction receiving dies 23, 23 and the pressing surface of the correction pressing die 27 are horizontal, and the screw shaft 3 held by the holding cylinder 19 has a point where its axis intersects the axis of the horizontal shafts 20, 20 on both sides. , The base plate 2 is leveled by the above pressure, and the screw shaft 3 is vertically arranged.
Will return to the original shape perpendicular to the axis of the screw shaft 3.

After the correction, the hydraulic cylinder 25 is contracted to return the correction pressing die 27 to the raised position, and the opening / closing door 28 is opened to take out the jack base 1.

In the illustrated embodiment, the screw shaft holding cylinder 19, the correction receiving die 23 and the correction pressing die 27 are arranged vertically.
Of course, these can be arranged horizontally or vertically upside down.

[0025]

As described above, according to this invention, the screw shaft of the jack base is inserted into the holding member, and the base plate is pressed by the straightening die and the straightening die, thereby correcting the inclination and bending of the base plate. The jack-based straightening process can be performed with a simple structure.

[Brief description of the drawings]

FIG. 1 is a partially cutaway front view of a straightening machine according to the present invention.

FIG. 2 is a longitudinal side view of the above.

FIG. 3 is a plan view of the same.

FIG. 4 is a front view showing the structure of a jack base.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Jack base 2 Base plate 3 Screw shaft 4 Nut 5 Handle 13 Upper table 14 Intermediate table 19 Screw shaft holding cylinder 23 Straightening die 25 Hydraulic cylinder 27 Straightening die

Claims (1)

(57) [Scope of request for utility model registration] 1. A jack-based straightening machine in which a nut is screwed onto a screw shaft erected on a base plate and handles are protruded on both sides of the nut, wherein a screw shaft holding member for inserting the jack-based screw shaft is provided. A correction receiving die for supporting the base plate is disposed at a position perpendicular to the axis of the screw shaft holding member at a position opposed to the axial direction, and a straightening die for pressing the base plate toward the correction receiving die at the position facing the correction receiving die is moved forward and backward. A jack-based straightening machine that is freely movable.