JPH0131425Y2 - - Google Patents

Description

[Detailed description of the invention] [Technical field of the invention] This invention relates to an installation tool for a hydraulic elevator that connects by rotating the plunger of a hydraulic jack of a hydraulic elevator that is carried in parts into a hoistway.
In particular, the present invention relates to a hydraulic elevator installation tool that can prevent contact between a cylinder and a plunger installed in the cylinder.

[Prior art]

Figures 1 and 2 show conventional hydraulic elevator installation tools. In the figures, 1 is the upper plunger of the hydraulic jack, 1' is a similar lower plunger, and 2A and 2B are grips for the plungers 1 and 1'. A pair of grippers 3, both of which are made of steel,
It is comprised of a joint fitting 4 which connects opposing ends of both grippers 3 to each other with a pin 5 so as to be bendable.
The free ends of the grippers 3 of each of these grip bands 2A, 2B are connected to each other by a fastener 6 made of bolts and nuts, and by tightening the fasteners 6, the grip bands 2A, 2
B is fixed to the outer peripheral surface of the upper plunger 1 or the lower plunger 1'. 7
8 is a through-hole drilled in the gripper 3; 8 is a handle for rotating the gripping bands 2A and 2B; 9 is for detachably attaching the handle 8 to the gripper 3 through the through-hole 7; This is the mounting pin. Further, 10 is a lower cylinder in which a lower plunger 1' is installed.

In the conventional hydraulic elevator installation tool having the above configuration, when connecting the upper and lower plungers 1 and 1' of the hydraulic jack, first, the pair of gripping bands 2A and 2B are attached to the upper and lower plungers 1 and 1', respectively. Both gripping bands 2
The joint ends of A and 2B are connected and tightened by a fastener 6. Thereby, the gripping bands 2A, 2B are fixed to the respective plungers 1, 1'. Next, the handle 8 is attached to the through hole 7 at the appropriate location using the attachment pin 9, and then the plunger 1,
Rotate 1'. Then, each plunger 1,
The threaded surface at the end of 1' is threaded, and the upper and lower plungers 1, 1' are integrally connected.

However, when the plunger 1 is rotated when the plungers 1 and 1' are connected, a bending load is applied and the plunger 1 swings back and forth and from side to side, causing the lower plunger 1' and the lower cylinder 10 to come into contact, causing the polished lower plunger 1' may be damaged. For this reason, the above-mentioned work has to be done carefully and has the disadvantage that it takes a lot of time. Also, while working, I accidentally accidentally lowered the lower plunger 1'.
If the surface of the product is damaged, a great deal of effort is required in addition to the above-mentioned work, such as re-applying the surface treatment.

[Summary of the idea]

This invention was made for the purpose of eliminating such drawbacks, and a guide fitting that is locked to the cylinder and prevents contact between the cylinder and the plunger is attached to the gripper, thereby preventing the plunger from coming into contact with the cylinder. The present invention proposes a hydraulic elevator installation tool that prevents damage to the surface and allows the guide fitting to be moved in the radial direction to accommodate differences in the outer diameter dimensions of the plunger and cylinder.

[Example of idea]

An embodiment of this invention will be described below with reference to FIGS. 3 and 4.

In the figure, the same reference numerals as in FIGS. 1 and 2 indicate the same or equivalent parts, 3' is a lower gripper arranged on the outer periphery of the lower plunger 1', and 11 is mounted on the upper end surface of the lower cylinder 10. An L-shaped plate-shaped guide fitting 12 is placed on the lower end surface of the lower gripper 3' and the bent portion of the outer end is locked to the outer edge of the lower cylinder 10. The lower gripper 3' and the guide fitting 11 are connected to the elongated hole 12 with a long axis.
They are connected to each other so as to be relatively movable in the radial direction with the elongated hole 12 as a regulating range via a bolt 13a that passes freely through the bolt 13a and a nut 13b that is screwed onto the bolt 13a.

By attaching the guide fittings 11 to each of the four lower grippers 3' that are gripped and fixed to the outer peripheral surface of the lower plunger 1', and tightening them with the bolts 13a and nuts 13b, the lower plunger 1' can be moved to the lower part. It can be installed at the center of the cylinder 10. Therefore, even if a bending load due to rotation is applied when the plunger is connected, the plunger can be prevented from moving. This prevents the lower plunger 1' from coming into contact with the lower cylinder 10 and the surface of the lower plunger 1' due to this. damage can be effectively prevented.

In addition, the lower plunger 1' and the lower cylinder 10
Even if the outer diameter of the hydraulic elevator changes depending on the loading capacity, speed, etc. of the hydraulic elevator, the position of the guide fitting 11 can be adjusted in the radial direction within the range of the elongated hole 12.
This can be fully dealt with.

[Effect of idea]

As explained above, in this invention, a guide fitting that is locked to the cylinder and prevents contact between the cylinder and the plunger is attached to the gripper so as to be movable in the radial direction, so that the plunger is not damaged. The hydraulic elevator can be easily installed, and even plungers and cylinders with different outer diameters can be installed using one type of installation tool. As a result, the connection time of the hydraulic jack can be significantly shortened.

[Brief explanation of the drawing]

Figure 1 is a vertical sectional view of a hydraulic jack with a conventional hydraulic elevator installation tool installed;
1, FIG. 3 is an enlarged cross-sectional view of a main part showing an example of a hydraulic elevator installation tool according to the invention, and FIG. 4 is a cross-sectional view taken along the line - in FIG. 3. 1': lower plunger, 2A, 2B: gripping band,
3': Lower gripper, 6: Fastener, 8: Handle, 1
0: Lower cylinder, 11: Guide fitting, 12: Long hole, 13a: Bolt, 13b: Nut. In each figure, the same reference numerals indicate the same or corresponding parts.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A gripping band in which a plurality of grippers are pivotally connected to each other and arranged in a wound manner around the outer surface of a plunger housed in a cylinder, and the ends of the gripping bands are connected to each other. A fastener for tightening the grip band to the plunger, and a handle that is removably attached to the gripper and rotates the plunger, wherein the gripper is locked to the cylinder and the handle is attached to the gripper to rotate the plunger. An installation tool for a hydraulic elevator, characterized in that a guide fitting for preventing contact between the plunger and the plunger is attached so as to be movable in the radial direction. (2) The installation tool for a hydraulic elevator according to claim 1, wherein the guide fitting is movable using a long hole provided in the gripper as a guide.