JPH0593639U - Rivet removal jig - Google Patents

Abstract

(57) [Abstract] [Purpose] A jig for removing rivets used for joining steel members in steel structures. [Structure] A reaction base integrated with a bottom plate under the left and right side plates that are opened in a substantially U-shape, a hydraulic jack mounted on the bottom plate of the reaction base, and a movable part mounting of this hydraulic jack A rivet removing jig consisting of a pressure support tool having a rod-shaped body facing upward in the central part.

Description

[Detailed description of the device]

The present invention relates to a jig for removing a rivet used for joining steel materials of a steel structure.

[0002]

[Prior Art]

 Many old steel structures are assembled by joining steel members with rivets. These structures require repair and reinforcement due to deterioration over time, but in this case rivets must often be removed.

[0003] Conventional methods of removing rivets have been the methods of pulling with an electric drill, or cutting one of the rivet heads and pulling with a manual hammer.

[0004]

[Problems to be solved by the device]

 However, such a method has drawbacks in removal speed and labor, and the present invention intends to solve these problems by a simple method.

[0005]

[Means for solving the problem]

 SUMMARY OF THE INVENTION In order to solve the above problems, the present invention provides a reaction plate integrated with a bottom plate under the left and right side plates that are opened in a substantially U-shape, and a hydraulic plate mounted on the bottom plate of the reaction plate. The present invention provides a rivet removing jig including a jack and a pressure-supporting tool having a rod-shaped body facing upward at a central portion on which a movable portion of this hydraulic jack is placed.

[0006]

【Example】

 1 shows an embodiment of the present invention. FIG. 1 is a perspective view showing a state where a rivet removing jig is attached to a steel member flange, FIG. 2 is a perspective view of a reaction table, and FIG. 3 is a perspective view of a hydraulic jack. FIG. 4, FIG. 4 is a perspective view of a pressure support device, FIG. 5 is a partially cutaway side view with each part set, FIG. 6 is a cutaway front view of the same part, and FIGS. 7 and 8 show another embodiment. FIG. 9, FIG. 9, FIG. 10, and FIG. 11 are schematic views showing a procedure for removing a rivet using the rivet removing jig according to the present invention in order.

In the figure, 1 is a reaction force stand, 2 is a hydraulic jack, and 3 is a pressure support.

As shown in FIGS. 2, 5 and 6, the reaction table 1 is a recess for supporting the lower outside of the hydraulic jack 2 at the lower opening of a pair of left and right side plates 11 and 12 that are substantially U-shaped. The bottom plate 14 on which the hydraulic jack mounting portion 13 is installed is bridged and integrated. Reference numeral 15 is a reinforcing material.

As shown in FIGS. 3, 5, and 6, the hydraulic jack 2 is composed of a fixed portion 21 and a movable portion 22, and the movable portion 22 is lifted by hydraulic pressure.

As shown in FIG. 4, FIG. 5, and FIG. 6, the pressure support tool 3 has a top plate provided with a rod-shaped body 31 in the central portion, which is provided above the peripheral wall 33 which covers the outside of the hydraulic jack 2. 32 is integrally formed into a tubular shape. In this embodiment, the rod-shaped body 31 is fixed by the nut 34, but needless to say, it may be welded. Providing a gap 35 between the inner side of the peripheral wall 33 and the outer side of the hydraulic jack 2 has the advantage described later.

Then, the lower side of the hydraulic jack 2 is placed on and supported by the hydraulic jack mounting portion 13 of the reaction force table 1, and the support member 3 is covered from above the hydraulic jack 2 to form a rivet removing jig as a whole. Become.

FIG. 7 shows an embodiment in which the hydraulic jack 2 is fixed to the bottom plate 14 of the reaction table 1 by the fixing bolt 6.

FIG. 8 shows an embodiment in which the pressure support tool 3 having a rod body on the plate body 36 facing upward is directly attached to the movable portion 22 of the hydraulic jack with the plate body 36 by the fixed bolt 6. Show.

It is preferable that the reaction table 1 and the pressure support 3 are made of steel so as not to lose the reaction force when the hydraulic jack 2 operates. Further, as the hydraulic jack 3, a known one can be used.

[0015]

[Action]

 The operation of the rivet removing jig according to the present invention will be described together with the rivet removing construction procedure. First, as shown in FIGS. 1 and 9, the head of the rivet 5 to be removed from the steel member flange 4 is previously cut with a gas burner, a sander or the like.

Next, as shown in FIG. 10, the reaction table 1 is set near the center of the rivet 5 to be pushed out by utilizing the U-shaped upper side portions of the left and right side plates 11 and 12, and the hydraulic jack of the bottom plate 14 is set. The hydraulic jack 2 is mounted and supported on the mounting portion 13, and the pressure support 3 is put on the hydraulic jack 2.

When the hydraulic jack 2 and the pressure-supporting tool 3 are set on the reaction table 1, the hydraulic jack 2 is operated to raise the movable portion 22 of the hydraulic jack 2. When the movable part 22 is raised, the pressure support tool 3 is also raised. When the pressure support tool 3 rises and the rod-shaped body 31 approaches the rivet 5, the operation is once stopped, and the rod-shaped body 31 is adjusted so as to contact the core of the rivet 5. The adjustment is easy if the gaps between the outer side and the inner side of the hydraulic jack 2 and the support member 3 are used.

After the adjustment, when the hydraulic jack 2 is actuated again to raise the movable portion 22, the rod-shaped body 31 of the pressure support tool 3 pushes up the rivet 5, and the rivet 5 is punched out and removed as shown in FIG.

[0019]

[Effect of the device]

 Since the present invention is constructed as described above, that is, since the reaction force base is integrally formed with the bottom plate having the hydraulic jack mounting portions below the left and right side plates having the substantially U-shaped opening, The upper side can be easily set in the rivet removal part, and the pressure support tool is positioned on the hydraulic jack mounted on the bottom plate.The pressure support rod can be easily riveted by operating the hydraulic jack. It is possible to push up the rivet and remove the rivet, which has the great effect of improving work efficiency and reducing labor.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment in which a rivet removing jig is attached to a steel member flange.

FIG. 2 is a perspective view showing an embodiment of a reaction force table.

FIG. 3 is a perspective view showing an embodiment of a hydraulic jack.

FIG. 4 is a perspective view showing an embodiment of a pressure support tool.

FIG. 5 is a partially cutaway side view showing an embodiment in which each part is set.

FIG. 6 is a partially cutaway front view showing an embodiment in which each part is set.

FIG. 7 is a schematic view showing another embodiment.

FIG. 8 is a schematic view showing another embodiment.

FIG. 9 is a schematic view showing a state where a head of a rivet to be removed from a steel member flange is cut.

FIG. 10 is a schematic view showing a state where a rivet removing jig is attached to a steel member flange which requires rivet removal according to the present invention.

FIG. 11 is a schematic view showing a state in which the rivets have been removed in FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Reaction table 11 Side plate 12 Side plate 13 Hydraulic jack mounting part 14 Bottom plate 15 Reinforcing material 2 Hydraulic jack 21 Fixed part 22 Movable part 3 Supporting device 31 Rod-like body 32 Top plate 33 Peripheral wall 34 Nut 35 Gap 36 Plate 4 Steel Member flange 5 Rivet 6 Fixing bolt

Claims (4)

[Scope of utility model registration request] 1. A reaction force base integrated with a bottom face plate provided below both left and right side plates having a substantially U-shaped opening, and a hydraulic jack mounted on the bottom face plate of the reaction force base and a movable portion of this hydraulic jack. A rivet removing jig, which comprises a pressure-supporting tool having a rod-shaped body directed upward in the center part to be placed. 2. The rivet removing jig according to claim 1, further comprising a hydraulic jack mounting portion for holding a lower portion of the hydraulic jack on a bottom plate of the reaction table. 3. The rivet removing jig according to claim 1, wherein the hydraulic jack mounted on the bottom plate of the reaction table is not fixed or fixed to the bottom plate. 4. A pressure-supporting tool having a rod-shaped body directed upward in a central portion located on the upper surface of the hydraulic jack is formed in a cylindrical body having a rod-shaped body on a top plate, and is covered on the outside of the hydraulic jack or rod-shaped. The rivet removing jig according to claim 1, wherein the plate body having the above is fixed to a movable portion of the hydraulic jack.