A universal joint is a free-angle joint that is used as an abdominal and girder shaft and other bearings.

Example of use

Description

The Girder Joint is used as a connection part for support in raising work. Adjust the dimensions of the girder that receives soil pressure (earth pressure) and water pressure with the jack handle, and install it.

Example of use

Specification

Specification

Manual (PDF)

Instructions (video)

PS dismantling procedure

Specification

Instructions (video)

PS dismantling procedure

Specification

Instructions 

Handling Instruction

Features

Reinforced jacks are jacks that reinforce the strength of the abdomen and girders. Conventionally, concrete was cast and filled, or an iron plate was welded to a girder to improve the strength of the abdomen, but the development of a reinforcing jack has made the work extremely easy. Compared with the conventional reinforcement method, it has the following advantages.

◆ Lightweight and easy to handle due to special processing technology.
◆ Since there is no need for welding, there is no damage to the abdomen due to temporary installation and it is easy to remove.
◆ There is no need to place concrete, so costs such as chipping work and waste material disposal can be reduced.
◆ Since it can be fixed with bolts, it can be easily installed.
◆ Even if a local deformation of the abdomen occurs, it can be dealt with promptly.

Construction example of reinforcement jack

Specification

Model No	DWJ-20	DWJ-30	DWJ-40	DWJ-50	DWJ-60
Yield strength (KN)	250 (25)	900 (90)	900 (90)	500 (50)	300 (30)
Machine height (mm)	167	260	305	438	438
Stroke (mm)	58	25	58	25	148
Weight (kg)	3	5.5 5.5	6.5 6.5	7	8.5
Applicable H-beam	H200 / H250 combined	H300	H350 / H400 combined	H500	H600
Dimension	PDF	PDF	PDF	PDF	PDF

Strength test

Handling instructions

DPC-DN

DP-4L

DP-4L / DPC-DN is used for the same purpose as DP-2L. A double-acting pump that can be pushed and pulled.
* Applies to universal jack DN Type

Combination Example

Combine with DN Preload Jack (Double Acting Type)

Specification

DPC-DN Handling Instructions

DP-4L handling instructions

Safety valve handling instructions

DPC-DN decompression operation (video)

DPC-DN pressurization operation procedure (video)

DPC-HU

DP-2L

DP-2L / DPC-HU is used for pre-pressurization and single-acting pressurization of universal jacks.
* Applies to universal jack H  Type / U type

Combination Example

Combine with Preload Jack (H Type / N Type)

Combine with U Preload Jack (Strong Type)

Specification

DPC-HU Handling Instructions

DP-2L handling instructions

DPC-HU Pressurization operation (video)

DPC-HU decompression operation (video)

PAS-02 is used for simultaneous pressurization of a large number of jacks during preload construction. Equipment for branching the hose.

PAS 01

PAS 02 (with high-pressure valve)

The PAH type is a flexible hose that adapts to the required pressure during preload construction.
The PSH type is an ultra-high pressure resin hose with excellent durability used for PGB.

Combination Example

Combine with Preload Jack (H Type / N Type)

Combine with DN Preload Jack (Double Acting Type)

Combine with U Preload Jack (Strong Type)

Combine with DP1 / DP3 Single Acting Preload Jack

Combine with DP5 / DP10 Double Acting Preload Jack

Specification

PGB is a measuring instrument that measures the axial force of a universal jack. By extending the PSH, it is possible to measure the changing axial force at any point. It can also be installed after preload construction. Since it is an inexpensive measuring instrument, it is possible to have many measuring points. It can be installed easily because no special tools are used.

Combination Example

Combine with Preload Jack (H Type / N Type)

Combine with DN Preload Jack (Double Acting Type)

Combine with U Preload Jack (Strong Type)

Manual

Correspondence diagram

Instruction Video

EP-0106 is a small electric pump that can be moved easily. Convenient for single-acting pressurization of universal jacks and small-scale interlocking pressurization.

(1) For replacement of bearings installed between piers and girders of expressways, viaducts, bridges, etc.
(2) With a ball seat, the load is evenly applied to the entire surface of the jack head and base.
(3) Comes with a safety (lock) nut for holding the load.
(4) The rod returns with a spring.
(5) In addition, for fine adjustment of machine installation.

Specification

Preload jack DP type

1. The preload jack is used for various purposes such as preloading, dismantling of girders, refilling, repairing structural columns, and raising bridges.

2. It is also widely used due to its ease of handling and economical cost.

3. The preload jack is a set product consisting of an oil jack, a high-pressure hose, and an oil pump

DP-5 type & DP-10 type

◆ DP-5 and DP-10 are used for large-scale preload work and demolition work of girders compared to DP-3 type on the previous page. The pressurizing pump can be used either manually or electrically.

◆ DP-1002 type has an end plate with bolted holes so that it can be easily attached to the beam for quick work.

Combination Example

Specification

Preload jack DP type

1. The preload jack is used for various purposes such as preloading, dismantling of girders, refilling, repairing structural columns, and raising bridges.

2. It is also widely used due to its ease of handling and economical cost.

3. The preload jack is a set product consisting of an oil jack, a high-pressure hose, and an oil pump

DP-1 type & DP-3 type

◆ This jack is easy to operate and is used for various purposes such as loading test and on-site construction.

◆ The DP-1 and DP-3 have a built-in spring in the oil jack, so when the pre-rotation is completed and the pressure is set to “0”, the discharged piston is automatically retracted.

◆ Since the head is screwed, the length can be adjusted according to the purpose of use.

◆ The oil pump is automatically switched between high and low, and the piston discharges quickly at low pressure, and there is little resistance at high pressure, and the pressurization operation is smooth.

◆ The main body is small and lightweight and easy to move.

Combination Example

Specification

This U type of preload jack is a model with further enhanced hydraulic pressure and mechanical strength compared to the H type.

It is used when the design axial force and the axial force at the time of disassembly are expected to be large.

The axial force of the girder can be measured by attaching an axial force measuring device (PGB).

Specification

* Weight (with adjustment material) is the weight when h = 100 mm (U50 only h = 150 mm) is attached to both ends.
* U20 / U25 can be compatible with H200 / H250 by changing the adjustment material.

Combination example 

Strength test

Instructions (video)

Adjusting Material

Instructions for vertical use

This DN type of preload jack has a return function, has large oil pressure, and therefore has a wide range of use.

It is used for many purposes such as preloading, refilling of girders, underpinning, bulking and relocation of bridges and building structures, and loading tests.

The axial force of the girder can be measured by attaching an axial force measuring device (PGB).

Specification

Combination example

Strength test

Adjusting Material

Handling instructions

PGB pressurization by manual pump DPC-DN (video)

Pressurization procedure by manual pump DPC-DN (video)

Decompression procedure using manual pump DPC-DN (video)

Instructions for vertical use

Manufacturer OSAKA JACK