JP2939062B2 - Terminal gear bearing replacement device and bearing replacement method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus and a method for replacing a bearing of a terminal gear, and more particularly to a method of replacing a bearing mounted on a terminal gear of a passenger conveyor. The present invention relates to a terminal gear bearing replacement device and a bearing replacement method thereof.

[0002]

2. Description of the Related Art In order to ensure the safety of a passenger conveyor, it has been customary to replace a bearing of a terminal gear with a new bearing when the accumulated operation time reaches a predetermined limit. As a device for achieving this, a device as described in Japanese Utility Model Laid-Open No. 3-107476 has been proposed. In short, the method of replacing terminal gear bearings used in such a device is as follows.
The bearing is removed together with the bearing box from the terminal gear shaft to replace the bearing.The bolts holding the bearing box are removed from the fixed frame, and a hydraulic cylinder is installed between the bearing box and the terminal gear. Is driven and the bearing box is pressed by the plunger so as to be extracted from the terminal gear shaft. As described above, when removing the bearing and the bearing box which are members holding the terminal gear shaft from the shaft,
In addition to the work of setting a support base under the shaft in advance to support the weight of the terminal gear supported by the shaft instead of the bearing, etc., also make sure that the weight of the steps and step chains on the inclined part of the conveyor does not affect the bearings For this reason, it is necessary to remove the step chain from the terminal gear in advance, and in particular, the latter requires a great deal of labor and time.

[0003] The work will be described first.
In order to secure a work space, after removing about 20 steps from the step chain, the part where the steps are removed is moved to the upper truss part. Next, the forward and return side step chains in the part from which the steps are removed are fixed to the truss using slinging wires and chain blocks, respectively.In this case, the step chains are cut off at the joints of the chains, and the terminal gears are cut off. , So that the weight of the step and the step chain of the inclined portion of the conveyor does not act on the bearing or the like.

[0004]

However, the removal of the step chain from the terminal gear is strict because a force of about 400 kg acts on the chain block and the slinging wire due to the weight of the inclined portion during the operation. It was working under conditions. Under such severe conditions, skill is required to fix the step chain to the truss so as not to damage peripheral equipment of the passenger conveyor. Also, the removal of the steps performed in the work process is about 20 sheets, as described above, which is about 1/3 of the total number of steps, and is physically demanding work. Since this work is like this, it is a setup work for replacing the bearing, but it takes about 4 hours of work including the time of recovery work, and the work time is This will account for about one third of the total working time for bearing replacement.
For this reason, this bearing replacement work wastes a great deal of time, during which time the passenger conveyor must be stopped, which hinders its use.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems of the prior art, and eliminates the need for cutting off chains of such a conveyor and removing the chains from a terminal gear. An object of the present invention is to provide a terminal gear bearing replacement device and a bearing replacement method capable of easily and quickly replacing a terminal gear bearing.

[0006]

SUMMARY OF THE INVENTION An object of the present invention is to provide a terminal gear bearing replacement device for detaching a terminal gear bearing for hanging an endless chain of a conveyor from the terminal gear shaft. 2. A terminal gear bearing replacement device according to claim 1, further comprising a vertical support device and a transfer device for moving the terminal gear shaft in a direction opposing the tension of the chains. Achieved by configuration.

A supporting device for supporting a terminal gear shaft in a vertical direction, which is a method for achieving the object of the present invention by using the terminal gear bearing replacement device according to claim 1. After supporting the terminal gear shaft with the bearing box, the terminal gear shaft is released together with the bearing box by moving means for moving the terminal gear shaft in a direction opposing the tension of the chains. Then, the bearing housing is detached from the terminal gear shaft, and a method for replacing a bearing of a terminal gear as described in claim 2 is realized.

[0008]

The terminal gear bearing replacement device and the bearing replacement method according to the present invention provide a terminal gear shaft together with its bearing box by a moving means for moving the terminal gear shaft in a direction opposing the tension of conveyor chains. When removing the bearing from the terminal gear and replacing it, a gap is created between the bearing box and the member that fixes it, and the bearing box is moved from the terminal gear shaft by friction. The bearings can be removed and replaced without removing the chains from the terminal gear without removing the bearings.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a perspective view of a main part showing a state in which a bearing of an upper terminal gear of a passenger conveyor is to be removed by using the apparatus of the embodiment. FIG. 2 is a bearing box fixing bolt after the apparatus of the embodiment is deployed. FIG. 3 is a schematic cross-sectional view taken along the line AA of FIG. 2.

First, the structure of the passenger conveyor will be described. Referring to FIG. 1, reference numeral 1 denotes an upper terminal gear of the passenger conveyor, which is provided with an upper terminal gear shaft 5 and an upper terminal sprocket 12 supported by the shaft. Both ends of the upper terminal gear shaft 5 are rotatably held by bearings 18 accommodated in a bearing box 11. The upper terminal gear 1 is hung above the endless step chain 8 to which the step 9 is attached, and the lower part is hung on a lower terminal gear (not shown). The step 9 is driven by a terminal gear via the step chain 8 by such a configuration. Truss constituting a main frame is provided at both end portions of these conveyor portions. In FIG. 3, reference numeral 15 denotes an upper truss, and reference numeral 3 denotes a truss bottom panel. Between the trusses provided on both sides of the conveyor, truss beam members 7 are laid horizontally.
A fixed frame 17 is provided between the upper and lower sides. The bearing housing 11 is fixed to the fixing frame 17 by bearing housing fixing bolts 16.

Next, the structure of the apparatus according to the embodiment of the present invention will be described.
When the bearing 18, which is a member holding the upper terminal gear shaft 5, is removed from the bearing box 11 together with the self-weight supporting jack, the upper terminal gear shaft 5 is connected to the bearing 18.
It is for supporting from below instead of the like. The dead weight support jack 2 is installed on the truss bottom panel 3 via a spreading plate 4 at a position near the bearing to be replaced. By interposing the spreading plate 4 between the weight supporting jack 2 and the truss bottom panel 3 in this manner,
A load of about 500 kg of the upper terminal gear 1 can be dispersed on the truss bottom panel 3. Reference numeral 6 denotes a side support jack of the upper terminal gear 1, which is disposed horizontally between the upper terminal gear shaft 5 and the truss beam member 7 when the bearing 18 is detached as described above, and near the bearing to be replaced. The upper terminal gear shaft 5 is installed from the side instead of the bearing 18 or the like. That is, the side support jack 6 applies a force opposing to the force of the upper terminal gear 1 being pulled in the lateral direction via the chain 8 by the weight of the step 9 of the conveyor inclined portion and the step chain 8, and the upper terminal gear This is a means for moving the shaft 5, and a pressing force exceeding the tensile force can be applied to the upper terminal gear shaft 5. 13 is a hydraulic cylinder for removing the bearing 18 from the upper terminal gear shaft 5,
Bearing box 11 facing upper terminal sprocket 12
The sprocket 12 is installed between the pressing abutment body 10 set in contact with the wall surface of the sprocket 12 and the sprocket 12, and a plurality of sprockets 12 are arranged at axially symmetric positions of the sprocket 12. Each of these hydraulic cylinders 1
A hydraulic pump (not shown) is connected to 3 via a hose 14, so that the hydraulic pump can supply oil at a constant pressure.

In order to remove the bearing 18 from the upper terminal gear shaft 5 of the passenger conveyor by using the apparatus of the embodiment of the present invention, as shown in FIG. 7-8 are removed to secure a working space in the upper truss 15. That is, the step 9 is removed to the extent necessary to perform the installation work of the weight supporting jack 2 and the side supporting jack 6. Then
Even if the weight supporting jack 2 is installed and operated below the upper terminal gear shaft 5 and the bearing box fixing bolt 16 is removed from the fixing frame 17 to release the fixing of the bearing box 11 to the fixing frame 17, the upper terminal The gear shaft 5 can be supported. At the same time, the side support jack 6 is placed horizontally between the upper terminal gear shaft 5 and the truss beam member 7 at a position near the bearing to be replaced. Here, when the side support jack 6 is installed between the upper terminal gear shaft 5 and the truss beam member 7, the side support jack 6 is particularly installed at a portion near the bearing to be replaced. 5 is supported by the side support jacks 6 instead of the bearings 18 and the like, and is supported at a portion close to the bearings 18 so that stable support can be performed in the same manner as the support by the bearings 18 and the like. That's why. Thereafter, the bearing housing fixing bolt 16 is removed to remove the bearing housing 11.
Is released from the fixing frame 17, and a hydraulic cylinder 13 is installed between the pressing abutment 10 set in contact with the wall surface of the bearing housing 11 facing the upper terminal sprocket 12 and the upper terminal sprocket 12. A hose 14 and a pump are connected to this. Thus, the deployment of the terminal gear bearing replacement device of the passenger conveyor is completed.

In such a state, the side support jack 6 is operated to apply a pressing force against the tension of the step chain 8 to the upper terminal gear shaft 5, and the upper terminal gear shaft 5 is moved in the direction of arrow B. Move it only slightly to support the sides. This operation is performed because a slight gap is created between the bearing housing 11 and the fixed frame 17 to eliminate friction between the two and to remove the bearing housing 11 from the upper terminal gear shaft 5 in the next operation. This is to make it easy to perform That is, in this state, when the hydraulic cylinder 13 is driven by the hydraulic pump and the plunger presses the bearing box 11 via the pressing abutment 10, the bearing 18 is moved to the bearing box 11.
Can be withdrawn from the upper terminal gear shaft 5.

Therefore, according to the embodiment of the present invention, when removing the bearing 18 from the upper terminal gear shaft 5 of the passenger conveyor, the step chain 8 is cut off at the joint of the chain and removed from the upper terminal gear 1. , The step chain 8 can be removed with the step chain 8 still hung on the upper terminal gear 1. Also, the removal of the step 9 from the step chain 8 in order to secure a working space in the upper truss 15 suffices to perform the installation work of the self-weight supporting jack 2 and the side supporting jack 6, as in the prior art. It is not necessary to remove step 9 which is about 1/3 of the total number of sheets. Further, the side support jack 6 is installed below the upper terminal gear shaft 5 as a boundary, and is installed on a side opposite to the upper side, which is a space where the bearing is replaced. Can be widely taken. Even when the side support jacks 6 are installed in this manner, since the side support jacks 6 are installed near the bearing to be replaced, the upper terminal gear shaft 5 can be stably supported as described above. it can.

It should be noted that, when the bearing 18 is removed and replaced with a new one in this way, and when the bearing 11 is mounted together with the bearing 11 on the upper terminal gear shaft 5, the step chain 8 is, of course, The technical means of the embodiment can be applied as it is even when the bearing 11 is replaced on the opposite side of the bearing 11 described in the embodiment. Needless to say.

In this embodiment, the jack is used to support the weight of the upper terminal gear 1 when removing the bearing 18 and to apply a force to the upper terminal gear 1 in a direction facing the tension of the step chain 8 to the upper terminal gear 1. However, in place of the jack, a pulley may be used to pull the terminal gear 1, such as a pulley.

When the bearing 18 of the upper terminal gear 1 is removed and replaced by using the apparatus of the embodiment of the present invention, the bearings 18 on both sides of the upper terminal gear 1 are simultaneously removed and replaced by using two sets of the same apparatus. In particular, if one of the bearings 18 is removed and the replacement is completed, and then the other bearing 18 is replaced in the same manner, one of the bearings 18 is fixed at a regular position, and thus stable. Since various positioning operations and adjustment operations for removing and replacing the other bearing 18 can be performed in a state in which the bearing 18 is removed, for example, a bolt for fixing the bearing box 11 to the fixing frame 17 after removing and replacing the bearing 18 is used. The work of inserting and screwing the bearing fixing bolt 16 into the hole can be performed smoothly,
It is extremely convenient to replace the bearing.

[0018]

As is apparent from the above description, the terminal gear bearing replacement device and the replacement method of the present invention are provided by the moving means for moving the terminal gear shaft in a direction opposing the tension of the conveyor chains. Since the gear shaft is moved together with the bearing housing in a direction opposite to the tension, as shown in the prior art, a chain of a conveyor such as a step chain hung on a terminal gear is cut off and removed from the terminal gear. No extra work is required. In addition, since it is not necessary to cut off the conveyor chains and remove them from the terminal gear in this way, a large number of transfer floor members such as steps are used from chains such as step chains to secure a space for the work. It is not necessary to remove the work as in the prior art, and it is only necessary to remove a small number of transfer floor members necessary for performing the work of installing the support means from the chains of the conveyor. Therefore, if the device of the present invention is used for the operation of replacing the terminal gear bearing, the operation does not require much labor and time as in the prior art, and the terminal gear bearing can be easily and quickly replaced. It becomes possible.

[Brief description of the drawings]

FIG. 1 is a perspective view of a main part showing a state in which a bearing of an upper terminal gear of a passenger conveyor is to be removed using the apparatus of the embodiment of the present invention.

FIG. 2 is a schematic plan view of a main part before the bearing box fixing bolt is removed after the device of the embodiment of the present invention is deployed.

FIG. 3 is a schematic sectional view taken along line AA of FIG. 2;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Upper terminal gear 2 Self-weight support jack 5 Upper terminal gear shaft 6 Side support jack 7 Truss beam 8 Step chain 9 Step 11 Bearing box 13 Hydraulic cylinder 16 Bearing box fixing bolt 17 Fixing frame 18 Bearing

Continued on the front page (72) Inventor Yoshio Matsuzaki 1-6-6 Kandanishikicho, Chiyoda-ku, Tokyo Inside the Hitachi Building System Service Co., Ltd. (72) Inventor Satoshi Yamamoto 1-6-6 Kandanishikicho, Chiyoda-ku, Tokyo Hitachi Building System Co., Ltd. In service (56) References JP-A 3-107476 (JP, U) (58) Fields investigated (Int. Cl. ⁶ , DB name) B66B 21/00-31/02 B65G 23/00-23/44 B23P 19/00-21/00 307

Claims (2)

(57) [Claims] 1. A terminal gear bearing replacement device for removing a terminal gear bearing for hanging an endless chain of a conveyor from a terminal gear shaft, comprising: a support device for supporting the terminal gear shaft in a vertical direction;
A terminal gear bearing replacement device, further comprising moving means for moving the terminal gear shaft in a direction opposing the tension of the chains. 2. After the terminal gear shaft is supported by a supporting device for supporting the terminal gear shaft in the vertical direction, the fixing of the bearing box of the terminal gear shaft is released, and then the terminal gear shaft is oriented in a direction opposing the tension of the chains. A terminal gear bearing replacement method, wherein a terminal gear shaft is moved together with its bearing box in a direction opposing the tension by a moving means for moving, and thereafter the bearing box is removed from the terminal gear shaft.