JPH09301667A - Gear attaching/detaching jig - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the efficiency of gear attaching/detaching work by inserting a penetrating bolt into a screw hole, fixing a jack bolt to a jig main body in parallel with the penetrating bolt and disposing a detachable pressing plate between the jack bolt and the gear. SOLUTION: A jig main body 11 is provided in a penetrating bolt through- hole 11a and hooks 12 engaged with the back surface of an urethane gear are attached to both end parts thereof so as to be freely rotated. A screw part 13a is provided in the tip part of a bolt 13 penetrating the penetrating bolt through-hole 11a. A jack bolt 14 is fixed to the jig main body 11 in parallel with the bolt 13 and a pressing plate 15 having a hole 15a for inserting the bolt 13 is disposed between the jack bolt 14 and the urethane gear so as to be detached. Thus, the efficiency of attaching/detaching the gear is improved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gear for driving a moving handrail such as an escalator or a moving walkway, which is attached to a mounting base for attaching and detaching a gear which is mounted in a narrow working space. The present invention relates to a gear attaching / detaching jig.

[0002]

2. Description of the Related Art FIG. 7 is a cross-sectional view of an essential part of an example of a conventional escalator. In the figure, 1 is a step, 2 is a return-side follow-up rail that guides a follow-up roller (not shown) of step 1 on the return path, and 3 is a return-side drive rail that guides a drive roller (not shown) of step 1 on the return path Reference numeral 4 denotes a handrail driving gear that is rotated by the movement of step 1, that is, a urethane gear, and reference numeral 5 denotes a handrail chain iron gear that meshes with the urethane gear 4 and drives a moving handrail (not shown).

FIG. 8 is a front view showing how the urethane gear 4 of FIG. 7 is removed. In the figure, 6 is a step drive link for transmitting a driving force to step 1,
The step drive link 6 is provided with teeth that mesh with the urethane gear 4. Reference numeral 7 is a mounting shaft to which the urethane gear 4 is mounted, 8 is a plurality of mounting bolts for mounting the urethane gear 4, and 9 is a small gear pulley removal.

Next, the operation will be described. When the urethane gear 4 meshes with the step drive link 6 to rotate, the handrail chain iron gear 5 meshing with the urethane gear 4 rotates, and the moving handrail moves in synchronization with the movement of step 1.

When the urethane gear 4 is to be removed when the urethane gear 4 is replaced due to damage or the like, first, all the mounting bolts 8 are removed, and the urethane pulley 4 is pulled out from the mounting shaft 7 using the gear pulley remover 9. Further, when mounting the urethane gear 4, insert the shaft hole of the urethane gear 4 into the mounting shaft 7.
Then, the urethane gear 4 is pushed in by hand, and then the mounting bolt 8 is attached.

[0006]

In the conventional method for attaching and detaching the urethane gear 4 as described above, since the space (L in FIG. 7) between the urethane gear 4 and the step 1 is narrow,
There is a problem that it is difficult to set the gear pulley extractor 9, and it is difficult to center the urethane gear 4, resulting in low work efficiency.

The present invention has been made to solve the above problems, and to improve the efficiency of gear attachment / detachment work even for a gear mounted in a place having a narrow working space. An object of the present invention is to obtain a handrail driving gear attaching / detaching jig for a passenger conveyor.

[0008]

According to a first aspect of the present invention, there is provided a gear attachment / detachment jig, wherein a jig main body provided with through-bolt through holes and a gear mounting base side surface of the jig main body. A hook that can be engaged with the through bolt, a through bolt that passes through the through bolt through hole and the mounting bolt through hole and is screwed into the screw hole, and a jack bolt that is screwed into the jig body in parallel with the through bolt. , And a detachable pressing plate arranged between the jack bolt and the gear.

A gear attaching / detaching jig according to a second aspect of the present invention is provided with a plurality of hooks whose intervals can be adjusted.

In the gear attaching / detaching jig according to the third aspect of the present invention, the through bolt through hole is an elongated hole.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. Embodiment 1. 1 is a side view showing a gear attaching / detaching jig according to Embodiment 1 of the present invention, and FIG. 2 is a side view showing a state in which a urethane gear of an escalator is removed by the jig shown in FIG.
FIG. 3 is a side view showing a state in which the urethane gear is attached by the jig of FIG. 1, and the configuration on the urethane gear side is the same as that of FIGS. 7 and 8.

In the drawing, 11 is a through bolt through hole 11
a is provided with a jig body, 12 is rotatably attached to both ends of the jig body 11, and a pair of hooks engages with the rear surface of the urethane gear 4, and 13 is a through bolt through hole 11a. These are two through bolts that pass through, and threaded portions 13a are provided at the tips of these through bolts 13. Reference numeral 14 is a jack bolt screwed to the jig body 11 in parallel with the through bolt 13, and 15 is a through bolt 13.
Is a removable pressing plate that has a hole 15a penetrating therethrough and that is arranged between the jack bolt 14 and the urethane gear 4.

Further, in FIGS. 2 and 3, reference numeral 16 denotes a mounting base on which the mounting shaft 7 is provided and the urethane gear 4 is mounted. The mounting base 16 has a plurality of screw holes into which mounting bolts 8 are screwed. 16a is provided. Furthermore, 4b
Is a shaft hole provided in the urethane gear 4 and through which the mounting shaft 7 penetrates.

Next, a method for attaching and detaching the urethane gear 4 will be described. When the urethane gear 4 is removed from the mounting base 16 and the mounting shaft 7, first, all the mounting bolts 8 are removed, and then the hook 12 is engaged with the surface of the urethane gear 4 on the mounting base 16 side as shown in FIG. With through bolt 1
3 is passed through the mounting bolt through hole 4a of the urethane gear 4 and screwed into the screw hole 16a of the mounting base 16. Then, by tightening the jack bolt 14 with the tip of the jack bolt 14 in contact with the mounting shaft 7,
Pull out the urethane gear 4 from the mounting shaft 7. Finally, the through bolt 13 is removed from the screw hole 16a.

On the other hand, when the urethane gear 4 is mounted on the mounting base 16 and the mounting shaft 7, the hook 12 is not used, so it is folded as shown in FIG. Then, the through bolt 13 is passed through the hole 15a of the pressing plate 15 and the mounting bolt through hole 4a of the urethane gear 4, and is further screwed into the screw hole 16a of the mounting base 16. In this state, the tip of the jack bolt 14 is brought into contact with the pressing plate 15 and the jack bolt 14 is tightened. As a result, the urethane gear 4 is pressed through the pressing plate 15 and inserted into the mounting shaft 7. After that, the through bolt 13 is removed, the jig is removed, and the mounting bolt 8 is tightened in its place, whereby the mounting of the urethane gear 4 is completed.

By using such a gear attaching / detaching jig, the urethane gear 4 can be easily attached / detached even when the mounting space is small, and the work efficiency is improved. Also,
When the urethane gear 4 is removed, the removed urethane gear 4 is penetrated by the through bolts 13, so that the urethane gear 4 is prevented from falling. Further, when mounting the urethane gear 4, insert the through bolt 13 into the screw hole 1 of the mounting base 16.
Since it can be screwed to 6a, this through bolt 1
With 3, the urethane gear 4 can be easily centered.

Embodiment 2 FIG. Next, FIG. 4 is a side view showing a gear attaching / detaching jig according to Embodiment 2 of the present invention, FIG. 5 is a front view of FIG. 4, and FIG. 6 is a front view of the pressing plate of FIG. In the figure, reference numeral 21 is a jig body to which the jack bolt 14 is screwed, and a plurality of hook mounting holes 21a for mounting the hooks 12 are provided at both ends of the jig body 21, respectively. Further, the jig body 21 is provided with an elongated hole-shaped through bolt through hole 21b that extends in the radial direction of the urethane gear 4 and allows the through bolt 13 to penetrate therethrough.
A pressing plate 22 is pressed by the jack bolt 14, and the pressing plate 22 is provided with an elongated hole 22a through which the through bolt 13 penetrates. Reference numeral 23 is a thumbscrew for attaching the hook 12 to the hook attachment hole 21a of the jig body 21.

In such a gear attaching / detaching jig, the basic operation is the same as that of the first embodiment, but by selecting the position of the hook attaching hole 21a to which the hook 12 is attached, a pair of two hooks 12 is provided. You can adjust the interval. Further, the through bolt 13 can be moved in the radial direction of the urethane gear 4 according to the position of the mounting bolt through hole 4a of the urethane gear 4, and it can be applied to the attachment and detachment of the urethane gear 4 of any size. . Further, not only the urethane gear 4 but also any gear having a similar mounting structure can be attached and detached.

In the second embodiment described above, the mounting position of the hook 12 is adjusted stepwise by providing a plurality of hook mounting holes 21a. However, the mounting position of the hook 12 is slid to continuously. It may be adjusted to. Further, the hook 12 may be detachable or locked in the retracted position so that the hook 12 does not get in the way when the gear is attached. Furthermore, the shape and number of hooks are not limited to the above example.

Further, a handle may be provided on the head of the jack bolt 14 so that the jack bolt 14 can be easily operated. Further, in the above example, the pressing plate 1
Although a hole for allowing the through bolt 13 to pass therethrough is provided in FIG. 5, the hole may be omitted as long as the pressing plate can be arranged while avoiding the through bolt 13.

[0021]

As described above, in the gear attaching / detaching jig of the invention of claim 1, the gear engaging / disengaging jig penetrates the hook for engaging the gear and the through hole of the attaching bolt of the gear and is screwed into the screw hole of the attaching base. Since it is equipped with a through bolt, a jack bolt, and a pressing plate arranged between the jack bolt and the gear, the efficiency of gear attachment / detachment can be improved even for a gear mounted in a narrow working space. Can be improved.

In the gear attaching / detaching jig according to the second aspect of the present invention, since a plurality of hooks having adjustable intervals are provided, gears of any size can be attached / detached.

In the gear attaching / detaching jig of the third aspect of the present invention, since the through bolt through hole of the jig body is an elongated hole, gears of any size can be attached / detached.

[Brief description of drawings]

FIG. 1 is a side view showing a gear attaching / detaching jig according to Embodiment 1 of the present invention.

FIG. 2 is a side view showing a state in which a urethane gear of an escalator is removed by the jig shown in FIG.

FIG. 3 is a side view showing a state where a urethane gear is attached by the jig shown in FIG.

FIG. 4 is a side view showing a gear attaching / detaching jig according to Embodiment 2 of the present invention.

FIG. 5 is a front view of FIG. 4;

FIG. 6 is a front view of the pressing plate of FIG.

FIG. 7 is a cross-sectional view of a main part of an example of a conventional escalator.

FIG. 8 is a front view showing how the urethane gear of FIG. 7 is removed.

[Explanation of symbols]

4 Urethane gear, 4a Mounting bolt through hole, 4b Shaft hole, 7 Mounting screw 11,21 Jig body, 11a, 2
1b through bolt through hole, 12 hook, 13 through bolt, 13a threaded portion, 14 jack bolt, 15, 2
2 Pressing plate, 16 mounting base, 16a screw hole.

Claims (3)

[Claims] 1. A mounting bolt penetrating through which a shaft hole, through which a mounting shaft provided on the mounting base penetrates, is formed in a central portion, and through which a mounting bolt screwed into a screw hole formed on the mounting base penetrates. In a gear attaching / detaching jig for attaching / detaching a gear whose holes are provided at intervals in the radial direction from the central portion to a mounting base, a jig main body provided with through bolt through holes, A hook provided on the jig body and engageable with the surface of the gear on the side of the mounting base; and a through bolt that penetrates the through bolt through hole and the mounting bolt through hole and is screwed into the screw hole. A gear comprising: a jack bolt screwed to the jig body in parallel with the through bolt; and a detachable pressing plate arranged between the jack bolt and the gear. Desorption jig. 2. The gear attaching / detaching jig according to claim 1, further comprising a plurality of hooks which are adjustable in distance from each other. 3. The gear attaching / detaching jig according to claim 1, wherein the through bolt through hole is an elongated hole.