JPH1111829A - Plunger return wheel installing table fixing jig for hydraulic elevator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To perform safely, easily, and quickly the mounting/removing works for a return wheel installing table mounted on a plunger of a hydraulic jack furnished in a hydraulic elevator by fixing the return wheel installing table. SOLUTION: The arrangement according to the present invention includes a holder part 20A to hold a return wheel installing table 4, a mounting part 14 formed so as to be installed fast to a jack rail 11 as a stationary structure, and a coupling part which can be elongated and shrunk for length adjustment and whose two ends are secured to the holder part 20A and mounting part 14. The coupling part is elongated or shrunk for adjustment, and the mounting part 14 is fixed to the jack rail 11, and the table 4 is held by the part 20A and secured to the specified position.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a working tool used for attaching / detaching from a plunger a return wheel mount attached to a top end of a plunger of a hydraulic jack installed in a hydraulic elevator.

[0002]

2. Description of the Related Art FIG. 8 is a perspective view showing a hydraulic jack which is a hydraulic actuator used as a drive device of a general hydraulic elevator and a configuration around the hydraulic jack. The plunger 3 is slidably inserted into the plunger 2, and the operation of pushing and returning the plunger 3 is performed by a hydraulic mechanism (not shown). At the upper end of the plunger 3, a turning wheel mounting base 4 is fixed by hexagonal bolts 5. A turning wheel 6 is fixed to the turning wheel mounting base 4 by bolts 7 and nuts 8. In the figure, both are separated. The state shown is shown.

In the figure, a bracket 10 is fixed to a shaft wall 9 shown as a white background portion, and a jack rail 11 is attached to the bracket 10. A jack guide shoe 12 fixed to the return wheel 6 is engaged with the guide portion 11a of the jack rail 11,
The plunger 3 functions to regulate the horizontal swing of the plunger 3 and to stably move the plunger 3 up and down along the jack rail 11.

A sealing member, not shown, such as a packing and an O-ring is provided on a sliding surface between the cylinder 2 and the plunger 3 to prevent leakage of hydraulic oil. These parts wear out and wear out over long periods of use and need to be replaced in a timely manner. When replacing parts, first remove the bolt 7 and the nut 8, lift the return wheel 6 with a chain block or the like, and then move the plunger 3 and the return wheel mount 4.
By removing or attaching the hexagon socket head cap screw 5 to fix the back wheel mounting base 4 with the hexagon wrench 13.

[0005]

In the replacement work of the consumables of the hydraulic jack of the conventional hydraulic elevator having the above-mentioned structure, the return wheel 6 is detached from the return wheel mount 4, and the return wheel mount 4 is further removed from the plunger 3. When the hexagon socket head cap screw 5 is loosened for removal or the hexagon socket head cap bolt 5 is to be tightened to be mounted on the plunger 3, the regulation by the jack guide shoe 12 is eliminated, so that the plunger 3 and the return wheel mounting base 4 are removed. Moves freely in the horizontal rotation direction, and the presser foot cannot be pressed.

Therefore, conventionally, in order to remove and attach the hexagon socket head cap screw 5 in this portion, a method has been adopted in which the rotation of the return wheel mounting base 4 is stopped by hand or square material or the like. In the case of such a working method, there is a problem that the working posture is unstable and the safety is lacking, and the work requires a long time.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problem, and separates a return wheel from a return wheel mounting stand mounted on a top end of a plunger of a hydraulic jack installed in a hydraulic elevator, thereby returning the return wheel. An object of the present invention is to stop movement of a return wheel mounting base in a horizontal rotation direction when performing mounting / detaching operation of a mounting base from a plunger so that mounting / removal operation can be performed more safely, easily, and in a short time.

[0008]

In order to solve the above-mentioned problems, according to the present invention, a holding portion attached to a plunger return vehicle attachment stand, an attachment portion attached to a fixed structure in a hoistway, and these are connected. A jig for fixing a plunger return wheel mounting base of a hydraulic elevator having a connection portion and fixing the return wheel mounting base to a fixed structure is used. Then, when performing the work of attaching and detaching the return car mounting base from the plunger using this fixing jig,
The purpose of the present invention is to stop the movement of the return wheel mounting base in the horizontal rotation direction so that the attaching / detaching operation can be performed more safely, easily, and in a short time.

Further, the mounting portion may be mounted on a guide portion of a jack rail or a cylinder of a hydraulic actuator (hydraulic jack), which is a fixed structure.

Further, the length of the connecting portion can be adjusted, so that it can be used in a wide range of hydraulic elevators having different dimensions, and the jig can be easily attached and detached.

The connecting portion may include a threaded rod and a sleeve having a threaded portion to be screwed to the threaded rod, whereby the length can be adjusted.

Further, the connecting portion may include a sleeve, a round bar, and a screw for fixing the round bar, so that the length can be adjusted.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION

Embodiment 1 FIG. FIG. 1 is a perspective view showing an entire structure of a fixture for fixing a plunger return vehicle mounting base of a hydraulic elevator according to a first embodiment of the present invention. Is equivalent to an attachment portion attached to a fixed structure in the hoistway, and is composed of a fixed rail presser 14A having an L-shaped cross section and a movable rail presser 14B.

As shown in FIG. 2, the fixed rail presser 14A
Are provided with two long holes 14a, and the movable rail retainer 14B is provided with screw holes 14b and 14c. The two rail holding bolts 15 are inserted into the elongated holes 14a, and the screw holes 14 provided in the movable rail holder 14B are provided.
The jack rail gripping portion 14 is formed by screwing the fixed rail holder 14A and the movable rail holder 14B into the jack rail holding portion 14b. Jack rail gripper 14
Has a function of holding the guide portion 11a of the jack rail 11 shown in FIG. 8, which is a fixed structure around the hydraulic jack, and fixing the plunger return vehicle mounting stand fixing jig to the guide portion 11a.

A sleeve 17 is fixed to a portion where the elongated hole 14a of the fixed rail retainer 14A is provided. FIG.
As shown in FIG.
And one end of a threaded rod 18 is screw-fitted to that part, and is formed so as to be fastened and fixed to the end face of the sleeve 17 by a threaded rod fixing nut 19, so that the length can be adjusted as a whole. Unit.

At the other end of the screw rod 18, a return wheel mounting base pressing portion 20 corresponding to a pressing portion mounted on the return wheel mounting base is fixed. The return wheel mounting base holding part 20 is a return wheel mounting base fixing holder 20A having an L-shaped cross section.
And a return wheel mounting base movable presser 20B, and a screw rod 18 is attached to the return wheel mounting base fixing presser 20A.

FIG. 4 is a perspective view of the movable carriage 20B.
As shown in the figure, the return wheel mounting base is fixed by the return wheel mounting base holding bolt 21 through the elongated hole 20a provided in the return wheel mounting base fixing presser 20A and the screw hole 20b provided in the return wheel mount support movable presser 20B. Stand fixing foot 20A
To form a return wheel mounting base holding portion 20 having a substantially U-shaped cross section as a whole. A screw hole 20c into which the turning wheel fixing bolt 22 can be screwed is provided on a side surface of the turning wheel fixing holder fixing presser 20A.

Next, an operation procedure for fixing the return wheel mounting base 4 by the plunger return wheel mounting base fixing jig of the hydraulic elevator of the present embodiment configured as described above will be described with reference to FIG.

First, the guide portion 11a of the jack rail 11 shown in FIG. 5 is sandwiched between the fixed rail presser 14A and the movable rail presser 14B, and the fixed rail presser 14A and the movable rail presser 14B are fixed by the rail presser bolts 15.
The jack rail fixing bolt 16 is firmly fixed to the guide portion 11a.

Next, by loosening the screw rod fixing nut 19 and adjusting the depth of screwing the screw rod 18 into the screw hole 17 a provided in the sleeve 17, the position of the return wheel mounting base holding part 20 is turned. Adjustment is made according to the gap between 4 and jack rail 11. Then, after the screw rod fixing nut 19 is tightened again, the peripheral portion of the return wheel mounting base 4 is sandwiched and gripped by the return wheel mounting base fixing presser 20A and the return wheel mount base movable presser 20B, and the return wheel mount holder holding bolt 21 is held. And fix it with. After that, the return wheel mounting base 4 is further tightened and fixed to the return wheel mounting base 4 by using the return wheel mounting base fixing bolt 22, and the positioning of the return wheel mounting base 4 in the horizontal rotation direction is fixed. In this state, the hexagonal wrench 13 is used to turn the hexagon socket head cap screw 5 in the same manner as in the prior art, so that the return wheel mount 4 is attached to and detached from the plunger 3.

As described above, the return wheel mounting base 4 is fixed in the horizontal rotation direction using the plunger return wheel mounting base fixing jig of the hydraulic elevator according to the present embodiment, whereby the return wheel mounting base 4 is fixed. When attaching / detaching to / from the plunger 3, it is not necessary to hold the rotation of the return wheel mount 4 with a hand, a square bar or the like, and a suitable working posture can be secured. That is,
The fixing of the turning wheel mounting base 4 in the horizontal rotation direction is reliably and easily performed, and the turning wheel mounting base 4 can be held on the plunger 3 in a stable state. It can be performed easily and in a short time.

Further, since the length of the connecting portion can be adjusted by expanding and contracting, the adjusting range can be widened, and it can be used widely even when the gap between the jack rail and the return wheel mounting stand is different.

In the above embodiment, the sleeve 17 of the connecting portion is fixed to the jack rail holding portion 14,
Although the screw rod 18 is fixed to the backrest mounting part 20, the sleeve 17 is returned to the backrest holding part 2.
The same effect can be obtained even if the screw rod 18 is fixed to the jack rail holding portion 14 by fixing the screw rod 18 to the jack rail holding portion 14.

Further, a round bar is used in place of the screw bar 18,
It is also possible to provide a structure in which a screw hole is provided on the side surface of the sleeve 17 and a set screw is screwed into this screw hole. In this case, the same effect can be obtained even if the length of the round bar is expanded and contracted by inserting and removing the round bar into and out of the hole provided in the sleeve, and the movement of the round bar is fixed by the set screw.

Embodiment 2 FIG. 6 is a perspective view of a jig for fixing a plunger return vehicle mount of a hydraulic elevator according to a second embodiment of the present invention. Sleeve 17, threaded rod 1
8 and the screw rod fixing nut 19 are the same as those in the first embodiment.
In the same manner as described above, a connection portion whose length can be adjusted is formed. At the end of the sleeve 17 of the connecting portion, a connecting portion fixing plate 23 provided in parallel with two long holes 23a formed long in the direction of the plunger 3.
Are fixed at right angles to the axial direction of the sleeve 17. Also, two long holes 2 formed long in the circumferential direction of the cylinder 2.
The cylinder mounting base 24 provided with 4a is fixed to the connecting portion fixing plate 23 by the connecting portion fixing plate mounting bolt 25,
The connecting part is attached to the cylinder part, and constitutes an attaching part.

A return wheel mounting base holding portion 26 having a U-shaped cross section is attached to the end face on the screw rod 18 side constituting the connecting portion. The reverse wheel mounting stand holding part 26 has a cross section L
The cross section is the same as that of 26A
Bolts 21 and the movable presser 26B
Are formed by being connected to each other. An elongated hole 26a and a screw hole 26b are provided on two surfaces forming the return wheel mounting base movable presser 26B having an L-shaped cross section, respectively. The screw rod 18 is a turntable fixing holder 26A.
However, the position is perpendicular to the direction of the U-shaped opening formed by combining the return wheel mounting base fixing presser 26A and the return wheel mounting base movable presser 26B.

As shown in FIG. 7, a plurality of housing fixing bolts fixing the housing 27 provided on the upper part of the cylinder 2 are used to mount the jig for fixing the plunger return vehicle mounting base of the hydraulic elevator to the cylinder 2. 2
After removing 8, the cylinder mount 24 is fixed to the upper surface of the housing 27 by the cylinder mount fixing bolt 29. Then, the connecting portion fixing plate mounting bolt 25
To adjust the tightening position of the elongated hole 23a and tighten again, and adjust the screwing position of the screw rod 18.

Next, the return wheel mounting base 4 is turned back and the return wheel mounting base fixing presser 26A and the return wheel mount base movable presser 26 are moved.
B, and tighten the return wheel mounting base holding bolt 21 and the return wheel mounting base fixing bolt 22. As a result, the return wheel mounting base 4 is turned back
6 and hold and fix the return wheel mounting base 4 at an appropriate position for attaching and detaching to and from the plunger 3.

According to the above-mentioned procedure, by using the peripheral portion of the hydraulic jack and attaching the return vehicle mounting stand fixing jig without using the jack rail as a fixing structure, the horizontal rotation direction of the return vehicle mounting stand can be obtained. Movement can be stopped. In addition, by adjusting using the connecting portion fixing plate and the long hole provided in the cylinder mounting base, the horizontal position of the connecting portion can be easily adjusted to a relatively wide range, thereby improving workability. it can.

[0030]

The present invention is configured as described above, and has the following effects.

Fixing the mounting portion to a peripheral fixed structure,
By holding the return wheel mounting base by the holding part and fixing it at a predetermined position, the horizontal rotation direction of the return wheel mounting base provided at the top end of the plunger is stopped, and the work of attaching and detaching the return wheel mounting base is performed safely and easily. Can be done in a short time.

Further, by attaching the mounting portion to the guide portion of the jack rail, it is possible to cope with a wide range simply by changing the position where the mounting portion is fixed, regardless of the position of the plunger of the hydraulic jack. Can be done.

Further, by fixing the mounting portion to the cylinder of the hydraulic actuator, it is possible to stop the movement of the vehicle mounting base in the horizontal rotation direction without using the jack rail, thereby improving workability.

Further, since the length of the connecting portion can be adjusted to extend or contract, the adjustment range of the fixing jig can be widened, and the fixing jig can be used in a wide range even when the gap with the fixing structure is variously changed.

[Brief description of the drawings]

FIG. 1 is a perspective view of a fixture for fixing a plunger-returned vehicle mounting base of a hydraulic elevator according to a first embodiment of the present invention.

FIG. 2 is an enlarged perspective view of a jack rail gripping portion of the plunger return vehicle mounting stand fixing jig of the hydraulic elevator shown in FIG.

FIG. 3 is an enlarged perspective view of a main part of a connecting portion of a jig for fixing a plunger return vehicle mounting stand of the hydraulic elevator shown in FIG. 1;

4 is an enlarged perspective view of a return wheel mounting base holding portion of a plunger return wheel mounting base fixing jig of the hydraulic elevator shown in FIG. 1;

FIG. 5 is a perspective view showing a use state of a plunger return vehicle mounting stand fixing jig of the hydraulic elevator shown in FIG. 1;

FIG. 6 is a perspective view of a jig for fixing a plunger return vehicle mounting base of a hydraulic elevator according to a second embodiment of the present invention.

FIG. 7 is a perspective view showing a use state of a plunger return vehicle mounting stand fixing jig of the hydraulic elevator shown in FIG. 6;

FIG. 8 is a perspective view showing an example of a configuration of a hydraulic jack and its periphery in a conventional hydraulic elevator.

[Description of Signs] 1 pit floor, 2 cylinders, 3 plungers, 4 return wheel mounting base, 5 hexagon socket head bolts, 6 return wheels, 1 return wheel
1 jack rail, 11a guide, 13 hexagon wrench, 14 jack rail gripper, 14A fixed rail holder, 14B movable rail holder, 17 sleeve, 1
8 Screw rod, 19 Screw rod fixing nut, 20 Turn-back wheel mounting base holding part, 20A Turn-wheel mounting base fixing foot,
20B returnable wheel mounting base movable holder, 23 connecting part fixing plate, 24 cylinder mounting base, 25 connecting part fixing plate mounting bolt, 26 reverse wheel mounting base holding part, 26A
Turner mount fixing holder, 26B Turner mount movable holder, 27 housing.

Claims (6)

[Claims] 1. A holding portion attached to a plunger return vehicle mounting base of a hydraulic elevator, an attaching portion attached to a fixed structure in an elevator shaft, and a connecting portion connecting the holding portion and the attaching portion. And a jig for fixing a plunger return wheel mounting base of a hydraulic elevator, the fixing jig having a return wheel mounting base fixed to the fixed structure. 2. The fixture according to claim 1, wherein the mounting portion is mounted on a guide portion of a jack rail as the fixed structure. 3. The fixture according to claim 1, wherein the mounting portion is mounted on a cylinder of a hydraulic actuator that is the fixed structure. 4. The jig for fixing a plunger return vehicle mounting stand of a hydraulic elevator according to claim 1, wherein a length of the connecting portion is adjustable. 5. The fixture according to claim 4, wherein the connecting portion includes a threaded rod and a sleeve having a threaded portion that is screwed to the threaded rod. 6. The fixture according to claim 4, wherein the connecting portion includes a sleeve, a round bar, and a screw for fixing the round bar to the sleeve.