JP2513802B2 - Auxiliary device for lifting elevator guide rails - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial field of application) The present invention is applied when hoisting a plurality of guide rails attached in an elevator hoistway one after another through splice plates. The present invention relates to an auxiliary device for lifting a guide rail of an elevator used.

(Prior Art) In recent elevator installation work, for the purpose of improving safety and saving labor, use a hoisting machine or a car frame that is permanently installed instead of providing a conventional scaffold in the hoistway. As a result, many construction methods have been adopted for attaching guide rails and assembling entrance / exit items.

When the guide rail is attached to the hoistway by such a construction method, first, as shown in FIG. 4, the uppermost part of the hoisting machine 1 is hung from a hoisting machine (not shown) on the hoistway 1 by a rope 2 via a hanging metal fitting 3. Lift the guide rail 4A attached to the inside of the hoistway 1. Then, when the lower end of the guide rail 4A rises to a level near the upper end of the next guide rail 4B standing on the curing plate 5 in the lower pit in the hoistway 1 as shown, the hoisting machine Stop, and in that state the worker abuts the upper and lower guide rails 4A, 4B,
As shown in FIGS. 5 to 7, the concavo-convex portions 4a and 4b formed on the joint end surfaces are meshed with each other, and the both guide rails 4A and 4A,
Bolts 8 are inserted through four fastening holes 5 formed near the joint end of the flange portion of 4B, and four fastening holes 7 formed in the upper and lower halves of the rectangular plate-shaped joint plate 6 respectively. By tightening 9 (see FIG. 8), both the guide rails 4A and 4B are fastened by the joint plate 6. Each of the fastening holes 5 and 7 has a diameter slightly larger than that of the bolt 8. The hoisting machine is operated while the bolt 8 and the nut 9 are temporarily tightened, and the hoisting machine is slightly lifted. After confirming / correcting the straightness of the rail surface, that is, after centering, the bolt 8 and the nut 9 are finally tightened and completely connected by the joint plate 6. Then, the hoisting machine is operated again to lift the guide rails 4A and 4B, and the third guide rail 4C (see FIG. 8) is connected to the lower end of the guide rail 4B and lifted in the same manner as the previous time. In this way, the guide rails are successively added to the lower end while hoisting, and the required number of guide rails, that is,
When the number of guide rails corresponding to the entire height of the hoistway 1 or the case of divided hoisting is increased, the guide rails of the number corresponding to the divided length are connected and hoisted, and the bracket is attached to the inner wall of the hoistway 1 as it is (Fig. (Not shown) is installed vertically.

(Problems to be Solved by the Invention) By the way, when the guide rail is hoisted via the rope 2 by the hoisting machine and the lower end of the guide rail is successively spliced by the joint plate 6 to lift, as described above, Seam board 6
Therefore, there is a problem in that a gap is generated between the upper and lower guide rails that are aligned and connected with each other, and it is necessary to re-work again.

That is, since the fastening holes 5 and 7 formed in each of the guide rails and the joint plate 6 have a diameter slightly larger than that of the bolt 8, the upper and lower guide rails are tightened with the joint plate 6 by the bolt 8. It is connected by the frictional force F and supports the lower load. This frictional force F is F = 4 μP, where P is the tightening force of each of the four bolts 8 and μ is the coefficient of friction between the guide rail and the joint plate 6. On the other hand, as shown in FIG. 8, the uppermost guide rail 4A
If the total length of the second and subsequent guide rails except L is L,
The load G applied to the joint plate 6 between the uppermost guide rail 4A and the second guide rail 4B that supports this is given by the weight of the unit length of the guide rail is a and the total weight of the joint plate 6 is b. , G = aL + b .... Further, the load applied to the joint plate 6 between the second guide rail 4B and the next third guide rail 4C is less than that of G by the weight of one guide rail. Similarly, the load applied to the lower joint plate 6 decreases in sequence. When the load G becomes larger than the frictional force F of the joint plate 6, a gap is created between the upper and lower guide rails during lifting. That is, G> F is in the case of L> (4 μP-b) ÷ a, and if the guide rails are connected and lifted longer than this L, the upper and lower guide rails 4A as shown in FIG. , 4B
A gap δ was generated between them, and a gap δ ′ was generated between 4B and 4C, and it was very troublesome to re-adjust the guide rails centered and connected.

Since the acceleration α of the hoisting machine needs to be taken into consideration when hoisting, the length L of the guide rails that can be hoisted at one time is further shortened, and a desired number of guide rails are connected and integrally hoisted. There was a problem that I could not stack.

The present invention has been made in view of the above circumstances, and an elevator guide that can solve the problem of the occurrence of a gap between the upper and lower guide rails during the lifting operation and that enables a combined integral lifting of a desired number of guide rails. An object is to provide an auxiliary device for lifting a rail.

[Structure of Invention]

(Means for Solving the Problem) In order to achieve the above-mentioned object, the elevator guide rail lifting assist device of the present invention includes a seam plate for each of upper and lower guide rails connected to each other via a seam plate. It is characterized in that it is composed of a pair of upper and lower horizontal bars that are detachably fastened by fasteners at a position avoiding it, and a pair of left and right vertical bars that connect both ends of the upper and lower horizontal bars.

(Operation) If the upper and lower guide rails connected by the joint plate are fastened together by using the guide rail lifting assistance device having the above-described configuration, the frictional force due to the fastening of the lateral bar and the guide rail is larger than the conventional one. It becomes possible to bear the load, and it becomes possible to lift up without creating a gap by connecting and integrating a large number of guide rails corresponding to it.

(Embodiment) An embodiment of the present invention will be described below with reference to FIGS. 1 and 2. In the figure, the same components as those shown in FIGS. 4 to 9 are designated by the same reference numerals to simplify the description.

First, FIG. 1 is a front view of an auxiliary device 10 for lifting a guide rail of an elevator, and FIG. 2 is a usage state diagram thereof. The guide rail lifting auxiliary device 10 has a seam plate 6 as in the conventional case.
A pair of upper and lower horizontal bars that are detachably fastened to the upper and lower guide rails 4A and 4B connected to each other by tightening the bolts 8 at positions avoiding the joint plates 6, respectively.
11A, 11B and a pair of left and right vertical bars 12A, 12B connecting both ends of the upper and lower horizontal bars 11A, 11B.

More specifically, the upper and lower horizontal bars 11A, 11B and the left and right vertical bars 12A, 12B are both made of steel plate, and the left and right vertical bars 12A, 12B are provided at both ends of the upper and lower horizontal bars 11A, 11B. It is connected and fixed by welding and is made into a slightly vertically long quadrangular frame shape. Fasteners in the form of two pairs of left and right rail clamps on the front intermediate portions of the upper and lower horizontal bars 11A and 11B.
13A and 13B are attached by bolts 14, respectively.
Of the two pairs of left and right, each fastener 13A on the left side in the drawing is attached by slidably fitting bolts 14 into long holes 15 formed in the horizontal bars 11A and 11B, respectively. The distance between the fastener 13B and the fastener 13B is adjustable in size.

In order to lift the guide rails by using the guide rail lifting auxiliary device 10 having the above-described structure, first, in the same manner as the conventional method, the seam plate 6 is applied to the rear surfaces of the upper and lower guide rails 4A and 4B. By tightening four bolts 8 each, the upper and lower guide rails 4A and 4B are connected and fixed in a state where they are aligned with each other. In this state, the upper and lower horizontal bars 11A and 11B of the guide rail lifting auxiliary device 10 are applied to the back surfaces of the upper and lower guide rails 4A and 4B at positions avoiding the joint plates 6, and two pairs of the left and right guide rails 4A and 4B are left and right. The upper and lower guide rails 4A, 4B with fasteners 13A, 13B
The respective bolts 14 are tightened and fastened so that the flange portion of the is clamped from the left and right. In this way, by attaching the lifting auxiliary device 10 and lifting the guide rail,
The lateral bars 11A, 11B and the guide rails 4A, 4B can withstand a larger load than the conventional frictional force F ′ due to the fastening, and a large number of guide rails corresponding to the load can be connected and integrated for a long time. It is possible to lift without causing.

That is, the frictional force F ′ due to the fastening between the horizontal bars 11A, 11B and the guide rails 4A, 4B is the dimension from the bolt center of the fastener 13A, 13B to the guide rail supporting position, with the fastening force of each bolt 14 as P ′. Assuming that the dimensions up to the horizontal bar support position are the same, the fasteners 13A, 13B are in two rows, and F '= 2 μP' ..., supporting the lower load by the amount corresponding to that of the conventional joint plate 6. The force is increased, and a large number of guide rails corresponding to the increased force can be connected and integrated to the lower side for a long time to lift without creating a gap.

The lifting assisting device 10 includes bolts for the fasteners 13A, 13B of the upper and lower horizontal bars 11A, 11B after the lifting work of the guide rail is completed.
It can be easily removed from the guide rails 14A and 14B by loosening 14.

In the above embodiment, the upper and lower horizontal bars 11A, 11B are provided with two pairs of left and right fasteners 13A, 13B, which are paired left and right depending on the length (number) of the guide rails to be lifted by connection and integration. Or you can freely set left and right three pairs or four pairs. In addition, since the acting load increases with the upper guide rail joint, the fasteners 13A, 13
Even if the guide rail hoisting auxiliary device provided with a large number of B is used with the number of fasteners 13A and 13B reduced toward the bottom,
The same effect as described above can be obtained.

FIG. 3 shows a modified example of the guide rail lifting assistance device 10 of the present invention, in which the upper and lower horizontal bars 11A, 11B are minimized in length, and the left and right vertical bars 12A, 12B are replaced by the upper and lower horizontal bars 11A, 11B. 11B is connected to the upper and lower positions of the left and right fasteners 13A and 13B to minimize the overall width dimension H. Even in this case, the same effect as in the above-described embodiment can be obtained, and it is effective when the space for lifting the guide rail in the hoistway is small.

〔The invention's effect〕

Since the present invention is configured as described above, if the upper and lower guide rails connected by the joint plate are fastened together using this guide rail lifting auxiliary device, the frictional force due to the fastening of the lateral bar and the guide rail It can bear a larger load than before, and it is possible to combine and integrate many guide rails for a long time and lift without creating a gap, and it is possible to re-center and correct the guide rails after lifting. It becomes simple and unnecessary.

[Brief description of drawings]

FIG. 1 is a front view of an elevator guide rail lifting auxiliary device showing an embodiment of the present invention, FIG. 2 is a state of use thereof, and FIG. 3 is a modification of the elevator guide rail lifting auxiliary device of the present invention. An example is a front view, FIG. 4 is an explanatory view showing a method of hoisting a guide rail into an elevator hoistway, FIG. 5 is a partial perspective view of a joint end portion of the guide rail, and FIG. 6 is a joint plate. FIG. 7 is a perspective view showing a state in which the upper and lower guide rails are connected by a joint plate, FIG. 8 is an explanatory view of a conventional example in which a large number of guide rails are connected and lifted, and FIG. It is an example of a defect occurrence state diagram. 4A, 4B, 4C …… Guide rail, 6 …… Seam plate, 10 …… Auxiliary device for lifting guide rail, 11A, 11B …… Horizontal bar, 12A, 12B
…… Vertical bars, 13A, 13B …… Fasteners.

Claims (1)

(57) [Claims] 1. A pair of upper and lower horizontal bars removably fastened by fasteners to upper and lower guide rails connected to each other via joint plates at positions avoiding the joint plates, and both upper and lower horizontal bars. An auxiliary device for lifting a guide rail of an elevator, which comprises a pair of left and right vertical bars connecting both ends of the bar.