CN-122009937-A - Belt tension adjusting tool

Abstract

The present disclosure provides a belt tension adjusting tool capable of easily and accurately adjusting belt tension of a belt used in an elevator door device and alignment of pulleys. The door device of an elevator is provided with a door motor which is fixed to a door frame in a position-adjustable manner via an adjustment fitting, a first pulley which is connected to the door motor, a second pulley which is fixed to the door frame and is connected to an opening/closing mechanism for opening/closing the door of the elevator, and a belt which is wound between the first pulley and the second pulley. The belt tension adjusting tool includes a main body portion disposed between the first pulley and the second pulley, a first arm portion extending from the main body portion toward the groove portion of the first pulley, a second arm portion extending from the main body portion toward the groove portion of the second pulley, and an adjusting mechanism that adjusts a distance between a distal end portion of the first arm portion and a distal end portion of the second arm portion.

Inventors

• YOSHII TOSHIFUMI

Assignees

• 三菱电机楼宇解决方案株式会社

Dates

Publication Date

20260512

Application Date

20251110

Priority Date

20241112

Claims (8)

1. 1. A belt tension adjusting tool for a door device, the door device comprising a door motor adjustably fixed to a door frame of an elevator via an adjustment fitting, a first pulley connected to the door motor, a second pulley fixed to the door frame and connected to an opening/closing mechanism for opening/closing a door of the elevator, and a belt wound around the first pulley and the second pulley, The belt tension adjusting tool includes: a main body portion disposed between the first pulley and the second pulley; A first arm portion extending from the main body portion toward the groove portion of the first pulley; a second arm extending from the main body toward the groove of the second pulley, and And an adjusting mechanism that adjusts a distance between a distal end portion of the first arm portion and a distal end portion of the second arm portion.
2. 2. The belt tension adjustment tool of claim 1, wherein, The belt tension adjusting tool includes: A first contact portion provided at a distal end portion of the first arm portion and having a surface curved along a groove portion of the first pulley, and And a second contact portion provided at a distal end portion of the second arm portion and having a surface curved along a groove portion of the second pulley.
3. 3. The belt tension adjusting tool according to claim 1 or 2, wherein, The first arm is a screw having a thread formed in a region on the base end side, The adjusting mechanism is provided with a first adjusting nut screwed with the first arm part, The main body portion includes a first insertion hole into which the first arm portion to which the first adjustment nut is screwed can be inserted from a base end side to a position where the first arm portion contacts the first adjustment nut.
4. 4. The belt tension adjusting tool according to claim 1 or 2, wherein, The second arm portion is a screw having a thread formed in a region on the base end side, The adjusting mechanism is provided with a second adjusting nut which is screwed with the second arm part, The main body portion includes a second insertion hole into which the second arm portion to which the second adjustment nut is screwed can be inserted from a base end side to a position where the second arm portion contacts the second adjustment nut.
5. 5. The belt tension adjusting tool according to claim 1 or 2, wherein, The belt tension adjusting tool further includes a ruler portion having graduations on one surface, one end side of the ruler portion being rotatably fixed to the main body portion, and the other end side of the ruler portion extending across the belt.
6. 6. The belt tensioning tool of claim 5, wherein, The belt tension adjusting tool further includes a guide member slidably inserted from the other end side of the straight portion and configured to contact the belt when slid along the straight portion.
7. 7. The belt tensioning tool of claim 6, wherein, The guide member includes a holding structure for holding a position relative to the ruler portion against a dead weight.
8. 8. The belt tensioning tool of claim 6, wherein, The guide member includes a fixing structure for fixing a position relative to the straight edge portion.

Description

Belt tension adjusting tool Technical Field The present disclosure relates to a technique of a belt tension adjusting tool used when adjusting belt tension of a driving mechanism of an elevator door. Background Patent document 1 discloses a technique for adjusting belt tension of an elevator door driving mechanism. In this technique, the case is tightly fitted to the bolt in a state where the bolt is loosened and the adjustment bracket to which the pulley is fixed is allowed to move. The pressing portion of the bracket pressing tool is brought into contact with the adjustment bracket, and the adjustment nut is rotated in the screwing direction to move the adjustment bracket, thereby adjusting the tension of the main belt. Prior art literature Patent literature Patent document 1 Japanese patent laid-open No. 10-77181 Disclosure of Invention Problems to be solved by the invention In the elevator door driving mechanism of the technology of patent document 1, a bolt for fixing an adjustment bracket to which a pulley is fixed is located directly above a main belt. Therefore, even if the adjustment bracket is moved in the tension direction of the main belt with the bolt as a fulcrum, the influence on the alignment of the pulleys is small. Here, it is considered to perform belt tension adjustment of a belt wound between a pulley of the door motor and a pulley of the driving mechanism. In general, bolts for fixing adjustment fittings to which the door motor is fixed are not disposed directly above the belt due to restrictions of the arrangement structure of the door motor. Therefore, when the position of the adjustment fitting to which the door motor is fixed is considered to be adjusted by the technique of patent document 1, there is a problem that a force in a deflection direction with a bolt as a fulcrum acts on the door motor due to the belt tension, and it is difficult to perform an operation of adjusting the belt tension while adjusting the pulley alignment. The present disclosure has been made to solve the above-described problems, and an object thereof is to provide a technique of a belt tension adjusting tool capable of easily and accurately adjusting the belt tension of a belt and the alignment of pulleys used in an elevator door device. Means for solving the problems The belt tension adjusting tool of the present disclosure is a belt tension adjusting tool of a door apparatus including a door motor that is adjustably fixed to a door frame of an elevator via an adjustment fitting, a first pulley that is coupled to the door motor, a second pulley that is fixed to the door frame and is coupled to an opening/closing mechanism that opens and closes a door of the elevator, and a belt that is wound between the first pulley and the second pulley, wherein the belt tension adjusting tool includes a main body portion that is disposed between the first pulley and the second pulley, a first arm portion that extends from the main body portion toward a groove portion of the first pulley, a second arm portion that extends from the main body portion toward a groove portion of the second pulley, and an adjustment mechanism that adjusts a distance between a distal end portion of the first arm portion and a distal end portion of the second arm portion. Effects of the invention According to the technology of the present disclosure, the first arm portion and the second arm portion can be brought into contact with and lifted up from the first pulley and the second pulley, respectively, by adjusting the adjusting mechanism. According to this configuration, since the first pulley and the second pulley disposed on the circumferential track surface of the belt can be applied with a force against the belt tension, the belt tension and the alignment of the pulleys can be easily and accurately adjusted. Drawings Fig. 1 is a front view of a door device of an elevator according to embodiment 1. Fig. 2 is a front view for explaining the structure of a driving mechanism of the door apparatus. Fig. 3 is a plan view of the drive mechanism in fig. 2 viewed from the direction a. Fig. 4 is a front view for explaining the belt tension adjusting tool. Fig. 5 is a diagram for explaining a process of setting a belt tension adjusting tool in a belt tension adjusting operation. Fig. 6 is a diagram for explaining a belt tension adjustment process in a belt tension adjustment operation using a belt tension adjustment tool. Fig. 7 is a diagram for explaining an alignment adjustment process in a belt tension adjustment operation using a belt tension adjustment tool. Fig. 8 is a diagram for explaining the structure of the belt tension adjusting tool according to embodiment 2. Fig. 9 is a diagram for explaining a process of setting a belt tension adjusting tool in a belt tension adjusting operation. Fig. 10 is a diagram for explaining a modification of the belt tension adjusting tool according to embodiment 2. Description of the reference numerals 1 Door