JPS5827402B2 - How to assemble a long hydraulic cylinder - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for assembling a long hydraulic cylinder used in hydraulic elevators and the like.

The long hydraulic cylinder used in the above hydraulic elevator is
Because the elevator car supported by this long hydraulic cylinder is extremely long because it is raised and lowered over multiple floors, it must be transported to the hydraulic cylinder installation site or carried into the elevator space at the hydraulic cylinder installation site. Taking this into consideration, during factory manufacturing (this hydraulic cylinder is cut into an appropriate number of pieces, the cylinder tube member and plunger member are individually packaged and transported, and then assembled in the elevator space mentioned above). I have to.

Therefore, transporting the hydraulic cylinder requires a large amount of packaging and transportation, including the number of divided tube members and the divided plunger members.
This results in an increase in transportation costs.

Of the cylinder tubes and plungers that make up a hydraulic cylinder, the plunger becomes unusable if the surface of the plunger gets even the slightest scratch due to machining force or if rust develops. Extreme care is required, especially when transporting the plungers, the surfaces of the rows of plungers must be coated with grease, wrapped with kraft paper and polyethylene sheets, and then wrapped tightly with a drainboard. This unnecessarily increases packaging and transportation costs.

Furthermore, the grease applied to the plunger must be removed when assembling the hydraulic cylinder, but since the hydraulic cylinder is long, removing this grease requires a great deal of effort and time. .

Therefore, the present invention not only simplifies the packaging during transportation of hydraulic cylinders (this also reduces the number of packaging and transportation of hydraulic cylinders to reduce assembly costs), and at the same time prevents scratches and rust from occurring on the surface of the plunger. The first objective is to provide a method that is free from the risk of causing

Furthermore, when assembling a conventional hydraulic cylinder, the cylinder tube member and plunger member were each connected to one piece within the elevator space, and then the plunger was lifted up with a chain block relative to the cylinder tube and inserted into the cylinder tube. (This requires construction work scaffolding at the height of each joint of the cylinder tube and plunger, and the work area is exposed to extreme danger due to the handling of heavy objects due to work at heights.) At the same time, problems such as damage caused by collision of other obstacles with the outer surface of the plunger have occurred.

Therefore, a second object of the present invention is to be able to assemble a hydraulic cylinder without requiring high-altitude work on the above-mentioned high scaffolding, without exposing workers to undue danger, and without damaging the outer surface of the plunger. The point is that it provides a method of assembling a hydraulic cylinder that does not require attachment.

In addition, in the conventional method, when cylinder tube members and plunger members are connected to each other to form a single body, the lowermost cylinder tube member and the plunger member (which are grounded) are connected to the other cylinder tubes one after another by placing the upper end of the lower cylinder tube member and the plunger member together. Since the members and plunger members were repeatedly added and connected upward, the connection work of these cylinder tube members and plunger members was performed simultaneously and every time the cylinder tube member and plunger member were added. It becomes necessary to sequentially install the work scaffold in an upper position, which increases the number of man-hours and the time required for assembling the hydraulic cylinder, and increases the number of days required to assemble the hydraulic cylinder.

For this reason, a limit was naturally placed on the number of sections of the hydraulic cylinder, and as a result, the length of the hydraulic cylinder became longer (there was a certain limit on this).

Therefore, it is a third object of the present invention to perform the connecting work (
The object of the present invention is to provide an assembling method in which a work scaffold can be kept at a constant height, and therefore a hydraulic cylinder having a longer length than in the past can be assembled.

The first configuration of the present invention is that when assembling a long hydraulic cylinder, the hydraulic cylinder is divided into a plurality of hydraulic cylinder members with the plunger housed in the cylinder tube, and the individual parts are separated. The hydraulic cylinder member is sealed in the gap between the cylinder tube member and the plunger member without removing the plunger member from within each cylinder tube member, and the airtight gap is filled with a vaporizable rust preventive agent. In this state, the divided hydraulic cylinder members are transported to a hydraulic cylinder installation site, and at this installation site, these divided hydraulic cylinder members are stacked up and down, and the 11 cylinder tube members and the plunger members are connected to each other.

A second configuration of the present invention is that when connecting the separated hydraulic cylinder members at the installation site in the first configuration 2 above,
First, a pair of divided hydraulic cylinder members are stacked vertically to connect their respective cylinder tube members and plunger members, and then another divided hydraulic cylinder member is integrally stacked at the lower end of these integrated hydraulic cylinder members. The method is to repeat the process of connecting, and then sequentially superimposing and connecting other divided hydraulic cylinder members at the lower end portions of these integrated hydraulic cylinder members.

Hereinafter, one embodiment of the present invention will be described based on the drawings.When manufacturing a hydraulic cylinder in a factory, the present invention is capable of
The hydraulic cylinder consisting of this cylinder tube and plunger is shown in Fig. 1a r I) +C (As shown, the upper hydraulic cylinder member 1a, the middle hydraulic cylinder member 1b, and the lower hydraulic cylinder member 1c (these are divided into three parts and individually The upper cylinder tube member 2a and the upper plunger member 3a, without removing the plunger members 3a+3b, 3c from the cylinder tube members 2a, 2b, 2c.
Middle cylinder tube member 2b and middle plunger member 3
b, and the lower cylinder tube member 2c and the lower cylinder tube member 3c are packaged together, and in each hydraulic cylinder member 1a, lb, 1c, vaporization occurs between the cylinder tube members 2a to 2c and the plunger members 3a to 3c. The surface of each plunger member 3a to 3c is sealed with a rust preventive agent 4, and the surface of each plunger member 3a to 3c is covered and protected with a cylinder tube member 2a to 2C, respectively. This prevents external force or impact from directly acting on the plunger members 3a to 3clC and causing scratches on their outer surfaces.

In other words, in the upper hydraulic cylinder member 1a, the upper end of the upper plunger member 3a is integrated with the plunger member 3a, with the upper plunger member 3a coaxially installed inside the upper cylinder tube member 2a, as shown in FIG. 1a. A sealing plate γ having an operation bundle 6 integrally is attached to the end face of the row of sealing caps 5, and the sealing cap 5 and the sealing plate 7 are closed with a cap 5. They are fixed together with bolts 8.

The lower part of this sealing plate 7 has an upper plunger member 3ac?
C. The upper stage cylinder tube member 2a is fitted with the fitted opening sleeve 9, and the gland packing 10 consisting of a packing 10a and a ring 10b for pressing it is interposed between the opening sleeve 9 and the upper stage cylinder tube member 2a. The cylinder tube member 2a10, the sleeve 9, and the sealing plate 7 are integrally fastened together with a stud bolt 11 and a nut 12, thereby airtightly sealing the upper ends of the upper cylinder tube member 2a and the upper plunger member 3a. .

Further, a male threaded joint part 13 is formed at the lower end of the upper-stage plunger member 3a to control the connection with the middle-stage plunger member 3b, and on the other hand, at the lower end of the upper-stage cylinder tube member 2a, it is connected to the middle-stage cylinder tube member 2b. A joint cover opening 14 is formed to control the above-mentioned joint male threaded portion 1.
A sealing nut 15 is screwed into the sealing nut 15, and a restraining sleeve 16 is interposed between the nut 15 and the lid opening 14 to ensure an airtight connection between the lower ends of the upper cylinder tube member 2a and the upper plunger member 3a. This is sealed, and a volatile rust preventive agent is sealed in the sealed gap 4 formed between the upper cylinder tube member 2a and the upper plunger member 3a.

Further, an eye bolt 19 integrally having a grip bundle 18 is screwed into the central threaded hole 17 of the sealing cap 5 through the sealing plate 7, and the thread pitch interval between the eyebolt 19 and the sealing cap 5 will be described later. For this reason, the thread pitch of the male joint threaded portion 13 of the upper plunger member 3a to which the sealing nut 15 is screwed is the same as 1 cancer! This is set.

In the middle stage hydraulic cylinder member 1b, a joint socket 20 is formed at the upper end of the middle stage cylinder tube member 2b, a joint cover opening 21 is formed at the lower end, and the middle stage plunger member 3b is formed with a joint socket 20 at the upper end.
A female joint threaded portion 22 is formed at the upper end, and a male joint threaded portion 23 is formed at the lower end.

As shown in FIG. 1, the middle cylinder tube member 2b and the middle plunger member 3b are attached to the upper end of the middle hydraulic cylinder member 1b. A two-stage sealing cap 24 that airtightly seals the upper ends of the socket 20 is screwed onto the female joint threaded part 22 and the threaded part 25 cut in the inner circumferential direction of the socket 20.

At the lower end of the middle hydraulic cylinder member 1b, there is a sealing nut 26 screwed onto the male joint threaded portion 23, and the nut 2
6 and the lid opening 21
As a result, the lower end surfaces of the middle cylinder tube member 2b and the middle plunger member 3b are hermetically sealed, and the middle cylinder tube member 2b and the middle plunger member 3 are sealed together.
A vaporizable rust preventive agent is sealed in the sealed gap 4 formed between the base plate and the base plate.

34 is a leg seat fixed to the restraining sleeve 27.

In the lower hydraulic cylinder member 1c, as shown in FIG. 1C, the upper end of the lower cylinder tube member 2c (where the joint socket 28 is formed) A female threaded portion 29 for a joint is formed, and a lower plunger member 3c is attached to the lower cylinder tube member 2c.
This lower hydraulic cylinder member 1 is installed coaxially internally.
A two-stage sealing cap 30 that airtightly seals between the upper ends of the lower cylinder tube member 2c and the lower plunger member 3C is carved into the inner peripheral surface of the female joint threaded portion 29 and the socket 28. The lower cylinder tube member 2c and the lower plunger member 3 are screwed together with the threaded portion 31
A vaporizable rust preventive agent is sealed in the sealed gap 4 formed between C and C.

Further, 40 is a cover plate that seals the lower end of the cylinder tube member 2c.

Note that 32° 32 shown in FIG.

Further, 33 and 33 shown in FIG. 1 asb are respective plunger members 3a.

3b is a buffer protection material wound around each plunger member 3a when assembling the hydraulic cylinder, which will be described later.

3b acts to prevent the cylinder tube members 2a and 2bl from coming into direct contact.

However, each hydraulic cylinder member i configured as described above
a, lb.

1c is packed to prevent damage or scratches due to force by wrapping appropriate protective members around each layer of cylinder tube members, and then transported to the site where the hydraulic cylinder is installed.

At the hydraulic cylinder installation site, the hydraulic cylinder is assembled according to the following steps.

That is, first, the sealing nut 26 of the middle stage hydraulic cylinder member 1b shown in FIG. The hydraulic cylinder member 1b is lifted slightly and the sealing nuts 26 are aligned, and then the middle hydraulic cylinder member 1b is grounded upright on the ground surface A via the leg seat 34 as shown in FIG.

Next, the second stage sealing cap 24 of the middle stage hydraulic cylinder member 1b
2, loosen the sealing cap 24 and unscrew the middle cylinder tube member 2b, and pull out the middle plunger member 3b upwardly by the required amount through the sealing cap 24 and the middle cylinder tube member 2b, as shown in FIG. 1))
As shown, a fixing jig 35 is fitted into the extracted portion of the middle plunger member 3b.

As shown in FIG. 3, this fixing jig 35 consists of two split ring bodies 35a, 35a, and bundle rods 35b, 35b attached to the ring bodies 35a, 35a, respectively, and a middle plunger member 3b. Opposing flange portions 35c, 35c of both ring bodies 35a, 35a wrapped around the outer peripheral surface of
By bolting 36 the middle plunger member 3
b, and in this secured state, the fixing jig 35 is brought into contact with the upper end of the middle cylinder tube member 2b, thereby preventing the middle plunger member 3b from falling off, and extracting the required amount of the middle plunger member 3b. After the posture is maintained and the fixing jig 35 is attached, the second stage sealing cap 24 is removed from the middle plunger 3b (see FIG. 2C).

Next, with the cap bolt 8 slightly loosened in advance, the second
As shown in FIG.
The lower part of the upper stage plunger member 3a is exposed, and the upper stage hydraulic cylinder member 1a is transferred directly above the middle stage hydraulic cylinder member 1b.

Next, as shown in FIG. 2C, the upper stage hydraulic cylinder member 1a is gradually lowered and stopped at a position where the upper stage plunger member 3a and the middle stage plunger member 3b are spaced apart from each other by about 1 to 2 cm. The attitude of the hydraulic cylinder member 1a is controlled and centering of both hydraulic cylinders (a-1b) is carried out.

Thereafter, when the sealing plate 7 is rotated by the operating bundle 6 of the sealing plate I with the operator grasping the handle bundle 18 of the eyebolt 19 to prevent rotation of the eyebolt 19, this sealing plate 7 has no openings. The upper cylinder tube member 2a is integrally connected by the lower sleeve 9 and the stud bolt 11, and the sealing cap 5a which is integral with the upper plunger member 3a is integrally connected via the cap bolt 8. The plate 7, the sealing cap 5, the upper cylinder tube member 2a, and the upper plunger member 3a rotate downward along the stationary Eyepol N9G, and at this time, the thread pitch between the eyebolt 19, the sealing plate 7, and the sealing cap 5 is are the male threaded joint portion 13 of the upper plunger member 3a and the female threaded joint portion 2 of the middle plunger member 3b.
As the upper plunger member 3a rotates and descends as described above, the male joint threaded portion 13 of the upper plunger member 3a connects to the joint of the middle plunger member 3b. female thread part 2
2, and the upper plunger member 3a and the middle plunger member 3b are connected to each other and integrated into a single piece as shown in FIG. 2d.

At this time, the bundle rod 35b of the fixing jig 35 is grasped to keep the middle plunger 3b stationary and to assist in guiding the male joint threaded part 13 so that it is reliably screwed into the female joint threaded part 22.

Once the upper plunger member 3a and the middle plunger member 3b are integrated, the protective material 33 and the fixing jig 35 are removed, the middle plunger member 3b is contracted into the middle cylinder tube member 2b, and the shrinkage is followed. Then, the entire upper hydraulic cylinder 1a is lowered as shown in FIG. 2d.

Next, as shown in Fig. 2e, loosen the nut 12 tightening the stud bolt 11 and tighten the upper plunger member 3a.
Then, the upper cylinder tube member 2a is lowered with respect to the sealing plate 7, and the lower lid opening 14 of the upper cylinder tube member 2a is connected to the upper socket 20 of the middle cylinder tube member 2b.
After confirming from the marking line 38 that both cylinder tube members 2a and 2b are connected coaxially and vertically, apply filletic acid solution between the lid opening 14 and the socket 20. Both cylinder tube members 2a and 2b are integrated.

After that, once the chain block 37 is aligned with the eye bolt 19, and the eye bolt 19 is screwed into the sealing cap 5 again, the chain block 37 is hooked on the eye bolt 19, and the nut 12 is tightened against the stud bolt 11, and the upper stage Pull up the hydraulic cylinder member 1a and the middle stage hydraulic cylinder 1b integrated therewith again to the original position,
As shown in FIG. 2f, the restraining sleeve 2γ with leg seat 34 is removed from the middle cylinder tube member 2b, and the lower hydraulic cylinder member 1c is stood upright directly below both hydraulic cylinder members la and ib.

Then, with the two-stage sealing caps 30 of this lower-stage hydraulic cylinder member 1C arranged and the lower-stage plunger member 3C pulled out slightly upward, the fixing jig 35 is secured to the lower-stage plunger member 3c. By the same procedure, the middle plunger member 3b and the lower plunger member 3c are connected and integrated using the male joint threaded part 23 and the female joint threaded part 29, and the middle cylinder tube member 2b and the lower cylinder tube member are connected. 2c are connected and integrated using the respective lid openings 21 and sockets 28.

This state is shown in FIG. 2g. In this way, the upper hydraulic cylinder member la, the middle hydraulic cylinder member 1b, and the lower hydraulic cylinder member 1c are connected to form a long hydraulic cylinder, so the cap bolt 8, the stud bolt 11, the nut 12, and the sealing plate 7 are removed. The part ring 9 and the upper cylinder tube 2a are fixedly connected with the connecting bolt 39. Therefore, as shown in the second figure, [this is because a long hydraulic cylinder for an elevator or the like is installed on the surface A. reach.

As is clear from the detailed description above, according to the present invention, when producing a hydraulic cylinder in a factory, the hydraulic cylinder is divided into a plurality of parts when the plunger is in the most retracted position, and each divided hydraulic cylinder member is attached to each cylinder. Since the cylinder tube member and the plunger member are transported coaxially and integrally without pulling out the plunger member from inside the tube member, the number of parts to be transported from the factory to the hydraulic cylinder assembly site can be minimized.

In other words, in the conventional method, when a hydraulic cylinder was separated and transported, the cylinder tube and plunger were packed and transported separately, so the number of parts to be packed and transported was a multiple of the number of parts separated. , since the cylinder tube member and the plunger member are transported together (this,
The number of parts to be transported can be reduced to half, thereby reducing packaging costs and transportation costs.

In the present invention, individual divided hydraulic cylinder members are integrally transported without removing the plunger member from within the cylinder tube member, so the row surfaces of the plunger members are covered and protected by the cylinder tube member, and during transportation and During the hydraulic cylinder assembly work, the outer surface of the plunger member is not used to being damaged by collisions with obstacles. Since the vaporizable rust preventive agent is sealed in the sealed gap between the tube member and the plunger member, the plunger member's 9+
Rust on the surface can be completely prevented. Therefore, unlike conventional methods, grease is not applied to the row surface of the plunger member, so this grease can be wiped off when assembling the hydraulic cylinder at the site where the hydraulic cylinder is installed. No work is required, and the huge amount of time and effort that was conventionally spent on removing this grease can be eliminated all at once.

Therefore, it is possible to reduce the working time and cost when assembling the hydraulic cylinder.

Furthermore, as described above, the present invention transports the individual divided hydraulic cylinder members in one piece without removing the plunger member from within the cylinder tube member, so when assembling the hydraulic cylinder, these divided hydraulic cylinder members are transported in one piece. Stack each cylinder tube member vertically,
Since it is only necessary to connect the plunger members, the assembly work of the hydraulic cylinder is extremely easy and quick, and work efficiency is dramatically improved.

That is, in the past, the divided cylinder tube member and plunger member were individually packaged and transported, so when assembling a hydraulic cylinder, the cylinder tube member and plunger member were connected separately.
After that, a troublesome procedure is required, such as inserting the plunger into the cylinder tube.

In the conventional method, the cylinder tube and plunger are separately integrated as described above, and then the inside of the cylinder tube (
Because this plunger was to be inserted, the work scaffold needed to assemble the hydraulic cylinder had to be installed at a height corresponding to the maximum extension position of the hydraulic cylinder, which increased work at heights.

However, in the present invention, each divided hydraulic cylinder member is equipped with a cylinder tube member and a plunger member, and the hydraulic cylinder is assembled by connecting these divided hydraulic cylinder members vertically as described above. The height of the work scaffold required for assembly is equivalent to the total length of the cylinder tube (in other words, it is half the height of the conventional method,
This not only makes scaffolding work easier, but also reduces the need to work at heights, reducing the danger to workers.

In addition, the present invention provides a method for connecting and assembling divided hydraulic cylinder members at the installation site (where a pair of divided hydraulic cylinder members are first stacked vertically and the respective cylinder tube members and plunger members are connected to each other, and then , the lower ends of these integral hydraulic cylinder members [here, other divided hydraulic cylinder members are integrally connected, and furthermore, at the lower ends of these integral hydraulic cylinder members, other divided hydraulic cylinder members Therefore, even if the number of divided hydraulic cylinders (the number of divided hydraulic cylinders per unit) is large, the divided hydraulic cylinder members are always connected at a fixed position, that is, at a single point from the ground plane. [This connection work can be done at the height of the new hydraulic cylinder section (O).
Since there is no need to raise the required work scaffold in parallel with the connection of the divided hydraulic cylinder parts, it is possible to significantly reduce the number of man-hours and work hours required for assembling the hydraulic cylinder, making it more efficient. In addition, the dangers of working at heights can be eliminated.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, and FIGS. 1a, b,
c is a partially broken part of the separated hydraulic cylinder member [m, Figures 2a to 2 are explanatory diagrams showing the method of assembling the hydraulic cylinder, and Figure 3 is a plan view of the fixing jig used for assembling the hydraulic cylinder. be. Ia, 1b, 1c... Hydraulic cylinder member, 2a
. 2b, 2c...Cylinder tube member, 3
a. 3b, 3c... Plunger member, 4...
・Sealed cavity for enclosing volatile rust preventive agent, 7.15, 24,
26°30... Sealing member, 13.22,23.
29... Threaded part for joint, 19.32...
・Preservation hardware.

Claims (1)

[Claims] 1. Cylinder tube [This method involves dividing the hydraulic cylinder into a plurality of hydraulic cylinder members with the plunger housed therein, and extracting the plunger member from each divided hydraulic cylinder member from within each cylinder tube member. Instead, the gap between the cylinder tube member and the plunger member is sealed, and a vaporizable rust preventive agent is sealed in the sealed gap, and in this state, the divided hydraulic cylinder member is transported to the hydraulic cylinder installation site and installed. A method of assembling a long hydraulic cylinder by stacking these divided hydraulic cylinder members vertically and connecting the respective cylinder tube members and plunger members to each other at the site. 2 The hydraulic cylinder is divided into a plurality of hydraulic cylinder members with the plunger housed in the cylinder tube, and each divided hydraulic cylinder member is separated into the cylinder tube member and the plunger member without removing the plunger member from within each cylinder tube member. At the same time, a vaporizable rust preventive agent is sealed in the sealed gap, and in this state, the divided hydraulic cylinder member is transported to the hydraulic cylinder installation site, and at this installation site, the pair is first separated. After overlapping the hydraulic cylinder members vertically and connecting the respective cylinder tube members and the plunger members, integrally overlapping and connecting other divided hydraulic cylinder members at the lower end of these integral hydraulic cylinder members, The method for assembling a long hydraulic cylinder involves repeating the process of sequentially overlapping and connecting other divided hydraulic cylinder members at the lower end of these integrated hydraulic cylinder members.