JPH1179610A - Connection method of hydraulic jack - Google Patents

Abstract

(57) [Summary] [PROBLEMS] In the conventional method, when connecting a hydraulic jack, in the case of a hydraulic jack structure in which the upper part of the rod does not project sufficiently from the lower end of the cylinder upper part, it is not possible to attach a detent, so the hydraulic jack connection There was a problem that can not be. SOLUTION: By removing a protective fitting 4, the upper end of the rod upper part 3b is supported on the upper end of the cylinder upper part 3a by a support 5 attached to the upper part of the rod 3b. The cylinder upper part 3
By lowering with respect to a, the non-rotating member 7 is attached to the lower end of the lowered rod upper portion 3b, and jack connection is performed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hydraulic jack connecting method in which a hydraulic jack provided in a hydraulic elevator is divided in advance and integrally assembled in a hoistway.

[0002]

2. Description of the Related Art FIG. 6 is a view for explaining a conventional example of a method of connecting a hydraulic jack provided in a hydraulic elevator described in Japanese Patent Application Laid-Open No. 8-231158. As shown in FIG. 6, as a conventional jack connection method, a hydraulic jack provided in a hydraulic elevator is connected to a lower divided body 2 formed including a cylinder lower part 2a and a rod lower part 2b fitted into the cylinder lower part 2a. , A cylinder upper portion 3a, a rod upper portion 3b fitted into the cylinder upper portion 3a, and a lower surface supported by an upper end portion of the cylinder upper portion 3a. And a support 5 for connecting and supporting these protective fittings 4 and the upper end of the rod upper part 3b in a state where the protective fitting 4 is opposed to the upper end of the rod upper part 3b. After being divided in advance into the upper divided body 3 to be formed and carried into the hoistway 1, it is turned to the upper end of the rod lower part 2b and the lower end of the rod upper part 3b, respectively. The $ 6 and detent employment 7 installed, the detent employment 7
In the state where the rotation of the rod upper part 3b is suppressed, the turning handle 6 is operated to urge the rod lower part 2b upward while rotating the rod lower part 2b.
There has been a hydraulic jack connection method in which a pair of threaded portions 2c, 3c formed respectively at the upper end of the rod b and the lower end of the upper rod 3b are screwed together to connect the lower and upper rods 2b, 3b.

[0003]

However, in the conventional method, in the case of a hydraulic jack structure in which the upper portion of the rod does not protrude sufficiently from the lower end of the cylinder, there is a problem that the hydraulic jack cannot be connected because the rotation stopper cannot be attached. there were.

[0004] The present invention has been made in view of such problems, and a first object of the present invention is to solve the above problems and to provide a hydraulic jack structure in which the upper portion of the rod does not sufficiently project from the lower end of the cylinder. It is an object of the present invention to provide a hydraulic jack connection method capable of hydraulic jack connection.

A second object of the present invention is to provide a hydraulic jack connection method which can efficiently implement the above-described hydraulic jack connection method.

[0006]

In order to achieve the first object, according to the first aspect of the present invention, a hydraulic jack provided in a hydraulic elevator is fitted to a lower portion of a cylinder and the lower portion of the cylinder. A lower divided body formed including a rod lower part, an upper part of a cylinder, an upper part of a rod fitted into the upper part of the cylinder, and a bottom surface which is disposed so as to face an upper end part of the upper part of the rod, A protective member installed so as to be supported by the upper end of the upper portion of the cylinder, and a support body for connecting and supporting these protective brackets and the upper end of the upper portion of the rod in a state where the protective metal member faces the upper end of the upper portion of the rod. After being divided in advance into an upper divided body that is formed and loaded into the hoistway, the handle and the detent are respectively turned to the upper end of the lower part of the rod and the lower end of the upper part of the rod. In the state in which the rotation of the upper part of the rod is suppressed by the rotation stop, the upper end of the lower part of the rod and the rod are operated by operating the turning handle to urge the lower part of the rod upward while rotating the lower part. In a method of connecting a hydraulic jack for connecting a pair of screw lower portions and an upper portion by screwing a pair of screw portions respectively formed at a lower end portion of an upper portion,
Remove the protection bracket and remove the upper end of the upper part of the rod,
The rod upper portion is lowered with respect to the cylinder upper portion so as to be supported by the upper end portion of the cylinder upper portion with the support, and then the rod upper portion is disposed at the lower end portion of the lowered rod upper portion. .

[0007] In order to achieve the second object, the invention according to claim 2 of the present invention is characterized in that the installation of the detent employment is
A suspender is installed on the upper part of the cylinder, and the suspender is used as a suspending point.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of a method for connecting a hydraulic jack according to the present invention will be described below with reference to FIGS.

FIG. 1 is a structural view of a hanging employee according to the present invention, and FIGS.
FIG. 5 is an explanatory view showing a work procedure according to an embodiment of the present invention, and FIG. 5 is an explanatory view showing a method of connecting a hydraulic jack according to an embodiment of the present invention.

The hanging hig 8 shown in FIG.
a, 8b, and shackles 8c, 8d. The hydraulic jack is sandwiched between the jack holding portions 8a, 8b, the jack holding portions 8a, 8b are fixed with the shackles 8c, 8d, and a wire rope (not shown) is hung on the shackles 8c, 8d. Thereby, the hydraulic jack is suspended.

In the hoistway 1 shown in FIG. 5, a scaffold 9 is provided near a connecting portion between the lower divided body 2 and the upper divided body 3, and this scaffold 9 is composed of a floor 9a, a handrail 9b, It has.

In the method of connecting a hydraulic jack according to this embodiment, first, as a preparation step, the hydraulic jack provided in the hydraulic elevator is connected to the lower cylinder 2a.
And a rod lower part 2b fitted into the cylinder lower part 2a.
A lower divided body 2 formed to include:
a, and a rod upper part 3 fitted into the cylinder upper part 3a.
b, a protective fitting 4 disposed to face the upper end of the rod upper part 3b, and having a bottom surface supported by the upper end of the cylinder upper part 3a. In the hoistway 1, the upper bracket 3 is divided in advance into an upper divided body 3 including a support 5 for connecting and supporting the protective fitting 4 and the upper end of the rod upper part 3 b in a state facing the upper end of the upper part 3 b. Carry in.

Next, as shown in FIG. 2, in a state where the upper divided body 3 is placed vertically, the upper divided body 3 is sandwiched between the jack holding portions 8a and 8b of the hanging member 8, and the jack holding portions 8a and 8b are held.
Is fixed with shackles 8c and 8d, and the wire rope 1
0 is the hook 11a of the hoist 11 and the shackle 8
c, 8d, so that the upper divided body 3 can be suspended.

Next, as shown in FIG. 3, the support 5 attached to the upper part of the upper divided body 3 which can be hung is removed, and the fixing bolt 12 for fixing the protection fitting 4 is loosened. Remove the protective fitting 4. Next, the suspended support 5 is attached to the rod upper part 3b which is exposed by removing the protective fitting 4.

Next, as shown in FIG. 4, the fixing bolt 14 fixing the protective cover 13 attached to the lower part of the upper divided body 3 is loosened. By winding up the hoist 11 in this state, the upper divided body 3 is suspended. At this time, the rod upper part 3b descends with respect to the cylinder upper part 3a,
The rod upper part 3b is supported on the upper end of the cylinder upper part 3a by the support body 5. As a result, a space is secured at the lower end of the lower rod portion 3b where the rotation preventing employment 7 can be attached,
At the lower end of the lowered rod upper part 3b, a rotation stop 7
Attach.

Next, as shown in FIG. 5, the upper divided body 3 is lifted in the hoistway 1, and the lower divided body 2 and the upper divided body 3 are erected in a straight line. A scaffold 9 composed of a floor 9a and a handrail 9b is installed near the connection part of the body.

Hereinafter, the connection of the hydraulic jack is performed by a procedure similar to the conventional procedure.

In the above embodiment, the procedure using the hanger 8 has been described in order to efficiently connect the hydraulic jack. However, the upper divided body is directly slung with the wire rope 10 without using the hanger 8. And the suspension allows the connection of the hydraulic jack.

[0019]

As described above, according to the first aspect of the present invention, in the case of a hydraulic jack structure in which the upper portion of the rod does not sufficiently project from the lower end of the upper divided body, the upper portion of the rod is required to be transported in advance. By removing the protection fitting attached to prevent the movement of the rod, the upper end of the upper part of the rod is supported by the upper end of the upper part of the cylinder by the support attached to the upper part of the rod. Is lowered with respect to the upper part of the cylinder, thereby securing a space in the lower end part of the upper part of the rod where a detent can be attached. Make a connection.

Further, in the invention according to claim 2, the installation of the detent employment is performed by installing a suspension employment on the upper part of the cylinder,
By performing the suspension with the upper part of the cylinder suspended as a suspension point, the rotation stopper can be more efficiently installed.

[Brief description of the drawings]

FIG. 1 is a structural view of a hanger of the present invention.

FIG. 2 is an explanatory diagram showing a work procedure according to an embodiment of the present invention.

FIG. 3 is an explanatory diagram showing a work procedure according to an embodiment of the present invention.

FIG. 4 is an explanatory diagram showing a work procedure according to an embodiment of the present invention.

FIG. 5 is an explanatory view showing a method of connecting a hydraulic jack according to an embodiment of the present invention.

FIG. 6 is an explanatory diagram showing a conventional example of a method of connecting a hydraulic jack provided in a hydraulic elevator.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Hoistway 2 Lower divided body 2a Cylinder lower part 2b Rod lower part 2c Screw part 3 Upper divided body 3a Cylinder upper part 3b Rod upper part 3c Screw part 4 Protective metal fittings 5 Support body 6 Turning handle 7 Rotation stop 8 Hanging 8a, 8b Jack pinching Part 8c, 8d Shackle 9 Scaffold 9a Floor 9b Handrail 10 Wire rope 11 Hoist 11a Hanging hook 12 Fixing bolt 13 Protective cover 14 Fixing bolt

Continued on the front page (72) Inventor Atsushi Nagase 1-6-6 Kandanishikicho, Chiyoda-ku, Tokyo Inside Hitachi Building System Co., Ltd.

Claims (2)

[Claims] 1. A hydraulic jack provided in a hydraulic elevator is provided with a lower divided body including a cylinder lower part, a rod lower part fitted into the cylinder lower part, a cylinder upper part, and fitted into the cylinder upper part. An upper part of the rod, a protection bracket disposed so as to face the upper end of the upper part of the rod, and having a bottom surface supported by the upper end of the upper part of the cylinder. After being divided in advance into an upper divided body including a support member for connecting and supporting the protective fitting and the upper end portion of the upper portion of the rod in a state facing the upper end portion, and then being carried into the hoistway, the lower portion of the rod is At the upper end of the rod and at the lower end of the upper part of the rod, a turning handle and a detent are installed, respectively. By operating the handle and biasing the lower part of the rod upward while rotating the lower part of the rod, a pair of screw portions formed at the upper end of the lower part of the rod and the lower end of the upper part of the rod are screwed together, and these lower parts of the rod are rotated. And a method of connecting a hydraulic jack for connecting the upper part, wherein the detent is removed, the protective fitting is removed,
After lowering the upper part of the rod with respect to the upper part of the cylinder so that the upper end of the upper part of the rod is supported on the upper end of the upper part of the cylinder by the support, the lower part of the upper part of the rod is lowered. A method of connecting a hydraulic jack, characterized by being installed. 2. The hydraulic jack according to claim 1, wherein the rotation stop is installed in a state where a suspension is installed above the cylinder and the suspension is suspended as a hanging point. Connection method.