JPH0447184Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a jack installation device for a hydraulic elevator.

[Conventional technology]

As shown in FIG. 5, the hydraulic elevator has a jack 11 equipped with a plunger 9 and a cylinder 10.
is installed on the jack holder 13, and the upper end of the plunger 9 of the jack 11 has a pulley 17 around which a rope (not shown) is wound, and an arm 16 extending at right angles to the direction in which the plunger 9 projects. is installed. Further, guide rails 8a and 8b are centered and fixed on the hoistway wall surface 20, and guide portions 15a and 8b mounted on the tips of the arm portions 16,
15b is movable along these guide rails 8a, 8b. Therefore, when the jack 11 is hydraulically operated to change the protrusion length of the plunger 9 from the cylinder 10, the plunger 9 is guided by the guide rails 8a and 8b and moves within the hoistway, and is wound around the pulley 17. A car (not shown) is raised and lowered via the rope.

Now, in a hydraulic elevator having such a configuration, in order to correctly transmit the change in the protrusion length of the plunger 9 to the car, the cylinder 1 of the jack 11 is
0 must be placed upright at a predetermined position on the jack holder 13 while maintaining a vertical posture. That is, as shown in FIG. 6, the center P of the jack holder 13 and the center Q of the plunger 9 are aligned, and this center position P (Q) is on the center line R connecting the guide rails 8a and 8b. It is desirable to be located in For this reason, the technology for centering and fixing the jack 11 with high precision in the hydraulic elevator during the installation process is
Various proposals have been made in the past.

For example, in the jack installation method disclosed in Japanese Utility Model Application No. 58-54458, a head cover with a diameter larger than the cylinder body is formed on the top of the cylinder, and a board with a marking line of the same diameter as the head cover is placed on the bottom of the cylinder. By hanging a verticality reference string from the two selected positions and correcting the posture of the cylinder so that the weight suspended at the tip of this verticality reference string matches the marking line, the center of the jack can be adjusted. This means making a contribution.

However, in the above-mentioned conventional technology, the verticality reference string hanging from the head cover shakes every time the posture of the cylinder is corrected, so it is troublesome to stop this shaking, and the shaking of the weight causes measurement errors, causing the center of the jack to swing. There was a problem that the output accuracy decreased. In addition, this prior art technique only corrects the verticality of the jack, and the position of the jack must be determined by another method before determining the verticality, resulting in poor work efficiency.

In contrast, in the jack installation method previously proposed by the present applicant (Japanese Patent Laid-Open No. 61-295981), after centering and fixing the guide rail to the hoistway wall, approximately half of the outer circumference of the jack's plunger is A jack centering rod with a fittable semicircular recess formed in a predetermined position is installed between the guide rails, and a weight is attached to the tip from the center gauge attached across the semicircular recess of the centering rod. Draw a marking line on the jack holder by hanging the verticality reference string, and then
A jack is set upright on the jack holder with its axis aligned with this marking line, and then the plunger of this jack is inserted into the semicircular recess of the centering hole to ensure a vertical position. be. According to this conventional proposal, since the work of determining the standing position of the jack and the work of determining the vertical posture can be performed in a series of work processes using jack centering, the work efficiency is good and the work of determining the jack center By inserting the plunger into the semicircular recess of the plunger, a vertical posture can be automatically ensured, so there is no measurement error caused by the swinging of the weight of the verticality reference string, and highly accurate centering can be performed.

[Problem that the invention attempts to solve]

However, in the above-mentioned conventional proposal using a jack centering method, different centering methods must be prepared depending on the outer diameter of the plunger of the jack, and this centering method reduces weight and prevents damage to the plunger. Taking this into consideration, the plunger is generally made of aluminum, so preparing a centering tool that corresponds to the outer diameter of the plunger poses a problem in terms of cost.

The present invention was developed in view of the above points, and its purpose is to improve work efficiency and centering accuracy during plunger installation, and to be able to accommodate multiple types of plungers with different outer diameters. To provide a jack installation device for a hydraulic elevator that can reduce costs.

[Means for solving problems]

The purpose of the above is to have a semicircular recess into which approximately half of the outer circumferential surface of the plunger can be fitted, and to be used as a centering rod for a jack that is installed between guide rails that are centered and fixed on the hoistway wall. This is achieved by using a plate-shaped body formed with two types of semicircular recesses, large and small, and cutouts for letting the rope escape on both sides of each semicircular recess.

[Effect]

According to the above means, two types of semicircular recesses with different inner diameters are formed in the centering hole of the jack, and plungers with different outer diameters can be fitted into each semicircular recess, so that at least The jack installation work can be performed using the same centering method for two types of plungers. In addition, if an auxiliary plate having a semicircular recess with a smaller diameter than the semicircular recess is attached to one of the semicircular recesses of this plunger, it can be used as another type of plunger with a different outer diameter. can also be made compatible.

〔Example〕

Hereinafter, embodiments of the present invention will be described based on the drawings.

Figure 1 is a plan view of the plate-shaped body used for centering the jack, Figure 2 is a work process diagram for drawing reference lines on the jack holder using this plate-shaped body, and Figure 3 is the plate-shaped body used for centering the jack. FIG. 6 is a work process diagram showing a state in which a plunger is fitted into a semicircular recess of FIG.

In Figures 1 to 3, a plate-like body 1 used for centering the jack is made of a substantially rectangular aluminum plate, and is fixed to a pair of gaudle rails 8a and 8b at both corners of the plate-like body 1, respectively. Engaging portions 2a and 2b are provided for this purpose, and semicircular recesses 3a and 3b having different inner diameters are formed in the central portions of both sides of the plate-shaped body 1, respectively. These semicircular recesses 3a, 3b can fit approximately half the circumference of a plunger having an outer diameter matching the respective inner diameters, and an upper end of the plunger is provided on both sides of each semicircular recess 3a, 3b. Cutouts 4a and 4b or cutouts 4c and 4d are formed for letting out a rope (not shown) that is wound around a pulley provided at the part and raises and lowers the car. Further, in this embodiment, an auxiliary plate 7 is attached to the peripheral edge of one semicircular recess 3a,
A semicircular recess 7a formed in this auxiliary plate 7 projects into the semicircular recess 3a.

One end of a narrow center gauge 5 with a mark 6 clearly marked at the center position is rotatably attached to a rotary shaft 20a protruding near the semicircular recess 3a of the plate-like body 1. The engagement notch 5a formed on the other end of the center gauge 5 is connected to the engagement shaft 21a of the plate-like body 1.
By engaging with the center gauge 5, the center gauge 5 is fixed to the plate-like body 1 across the semicircular recess 3a, and at this time, the index 6 is aligned with the center of the circle formed by the semicircular recess 3a. . Similarly, when one end of the center gauge 5 is attached to the rotating shaft 20b and the engagement notch 5a at the other end is engaged with the engagement shaft 21b, the center gauge 5 straddles the other semicircular recess 3b. It is fixed to the plate-like body 1.

Now, when performing jack installation work, first of all,
Attach the plate-shaped body 1 between the guide rails 8a and 8b,
After temporarily fixing the jack cradle 13 to the bottom of the hoistway,
As shown in FIG. 2, the indicator 6 of the center gauge 5
A verticality reference string 23 is suspended from the position, and a reference line 14 is drawn on the surface of the jack holder 13 using the tip of the conical weight 12 suspended from the tip of the verticality reference string 23 as a reference. Next, the verticality reference string 23
Remove it, align the shaft center position with the reference line 14,
Place the cylinder 10 of the jack 11 on the jack holder 13
erected above. After that, as shown in Figure 3,
The plunger 9 protruding from the cylinder 10,
Semicircular recess 7a of auxiliary plate 7 attached to plate-shaped body 1
The plunger 9 is inserted into the inside of the plunger 9 so that approximately half the circumference of the outer peripheral surface of the plunger 9 matches the semicircular recess 7a. Here, since the auxiliary plate 7 is attached at a position such that its semicircular recess 7a forms a semicircle concentric with the semicircular recess 3a, the plunger 9 is inserted into the semicircular recess 7a. When inserted, the axis of the jack 11 completely coincides with the verticality reference string 23 hanging from the index 6 of the center gauge 5, and the vertical posture of the jack 11 is ensured. Therefore, the work of determining the erected position of the jack 11 on the jack holder 13 and the work of determining the vertical posture of the erected jack 11 are performed in a series of work processes using the plate-shaped body 1. In addition, since the vertical position of the jack 11 is automatically secured by inserting the plunger 9 into the semicircular recess 7a, highly accurate centering can be performed.

After the jack 11 is set upright while maintaining a vertical posture at a predetermined position on the jack cradle 13, the jack cradle 13 is fixed to the bottom of the hoistway, and the cylinder 10 of the jack 11 is placed on the jack cradle 13. Fix it. In this way, the jack 11 whose upright position and vertical posture are set with high precision on the jack cradle 13 allows the plunger 9 to move along the vertical line in response to hydraulic operation, so that the car can be moved smoothly. Operation and stopping position accuracy are guaranteed.

Further, in the above embodiment, the semicircular recess 3 of the plate-like body 1
Since both a and 3b do not match the outer diameter of the plunger 9, the semicircular recess 7a is formed to a desired size.
The auxiliary plate 7 having a diameter of
3b, the plate-like body 1 can be used without attaching the auxiliary plate 7. For example, as shown in FIG. 4, when the outer diameter of the plunger 9' protruding from the cylinder 10' of the jack 11' matches the inner diameter of the semicircular recess 3a of the plate-like body 1, The plunger 9' is inserted into the semicircular recess 3a.
By fitting the jack 11' into the inside, the vertical posture of the jack 11' can be secured. Similarly, when installing a jack equipped with a small diameter plunger that matches the inside diameter of the semicircular recess 3b, this plunger can be installed in a semicircular shape. What is necessary is just to fit into the recess 3b. In addition, when using the semicircular recess 3b, the verticality reference string 2 is connected to the center gauge 5 attached at a position straddling the semicircular recess 3b.
3 and draw the reference line 14. In the end, the same plate-like body 1 can be used to accommodate three types of plungers with different outer diameters, and unlike the prior art described above, many types of plungers can be set according to the outer diameter of the plunger. This eliminates the need to do so, resulting in cost reductions.

[Effect of idea]

As explained above, the jack installation device for hydraulic elevators according to the present invention uses a plate-shaped jack centering device with two types of semicircular recesses with different inner diameters, and by attaching an auxiliary plate as necessary, the same jack centering device can be used for multiple types of plungers with different outer diameters.
Therefore, in addition to improving the work efficiency and centering accuracy, the number of personnel required for centering the jack can be reduced, resulting in significant effects in reducing costs.

[Brief explanation of the drawing]

Figure 1 is a plan view of the plate-shaped body used for centering the jack, Figure 2 is a work process diagram for drawing reference lines on the jack holder using this plate-shaped body, and Figure 3 is the plate-shaped body used for centering the jack. Fig. 4 is a work process diagram showing a state in which the plunger is fitted into a semicircular recess, Fig. 4 is a work process diagram showing another example of the use of this plate-like body, Fig. 5 is a diagram showing the main part configuration of a hydraulic elevator, Fig. FIG. 6 is a sectional view taken along line A--A in FIG. 5. 1... Plate-shaped body (jatsuki centering), 2a, 2
b...Engaging portion, 3a, 3b, 7a...Semicircular recess, 4a, 4b, 4c, 4d...Notch, 5...Center gauge, 7...Auxiliary plate, 8a, 8b...Guide rail , 9... plunger, 10... cylinder, 11... jack, 13... jack cradle,
14...Reference line, 23...Verticality reference string.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) After centering and fixing the guide rail for guiding the vertical movement of the pulley provided at the upper end of the plunger of the jack to the shaft wall surface, approximately half the circumference of the outer circumferential surface of the plunger. A jack centering rod equipped with a semicircular recess into which the centering rod can be inserted is installed between the guide rails, and a verticality reference string is hung from the center gauge attached across the semicircular recess of the centering rod. Then, draw a reference line on the jack holder, and then erect the jack on the jack holder based on this reference line, and fit the plunger of this jack into the semicircular recess of the centering hole. In the jack installation device for a hydraulic elevator during the installation process, which centers and fixes the jack, two types of semicircular recesses, large and small, with different inner diameters are formed as the jack centering part, and each semicircular recess is 1. A jack installation device for a hydraulic elevator, characterized in that a plate-like body is used in which cutouts are formed on both sides of a circular recess to allow the ropes wound around the pulley to escape. (2) In the statement in paragraph (1) of claims for utility model registration, the plate-shaped body has a semicircular shape that projects into one of the semicircular recesses and has a diameter smaller than that of the semicircular recess. A jack installation device for a hydraulic elevator, characterized in that an auxiliary plate having a shaped recess is attached.