Door device

Abstract

To provide a door device with a structure that can correct deviation of a timing belt with a pulley.SOLUTION: A door device according to the present invention includes a door device base for mounting the door device to a building, and a door attached via a connector to an endless timing belt, which is wound around a pair of pulleys provided on the door device base, in which one or both of the pulleys are rotatably mounted on a shaft fixed to the door device base via a pulley base assembly, and the pulley base assembly is configured to be able to change the angle between the rotation axis of the shaft and the extending direction of the timing belt.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] The present invention relates to a door device having a structure for correcting misalignment of a timing belt relative to a pair of pulleys in a door device having a structure in which a door is attached to a belt stretched between the pair of pulleys via a connector. [Background technology]

[0002] Conventionally, an automatic door system 100 that automatically opens and closes doors has been known, as shown in FIG. 6, to include an automatic door system base 102 for mounting the automatic door system 100 to a building, a drive unit 104 attached to the automatic door system base 102, and a door 106 that opens and closes due to the drive unit 104 (Patent Document 1). The drive unit 104 includes a motor 110 and a reducer 112 to which the driving force from the motor 110 is transmitted, and a pulley 116 that functions as a driven pulley is attached to a first shaft 114 incorporated in the reducer 112. A pulley base 120 to which a second shaft 118 is fixed is fixed at a position spaced apart from the driven pulley 116 in the moving direction of the door 106, and a pulley 122 that functions as a driven pulley is rotatably provided on the second shaft 118. 7 is a schematic partial cross-sectional view taken along line BB in FIG. 8, and as shown in the drawing, pulley base 120 to which second shaft 118 is fixed is formed by bending a plate-like body into a U-shape. Specifically, pulley base 120 includes a base portion 120a extending in a direction perpendicular to the extension direction L1 (see FIG. 7) of timing belt 124, an upright portion 120b rising from one end of base portion 120a in a direction perpendicular to the extension direction of timing belt 124, and a shaft support portion 120c extending from an upper end of upright portion 120b in a direction perpendicular to the extension direction of timing belt 124 and to which second shaft 118 for a driven pulley is fixed. Meanwhile, a pair of aluminum rails 102a with a T-shaped cross section are formed integrally with the automatic door device base 102 so as to extend in the direction of extension of the timing belt 124. After inserting and aligning seat plate 103b with bolt 103a fixed into a groove formed between the pair of aluminum rails 102a and the automatic door device base 102, bolt 103a is inserted into a hole (unnumbered) formed in base 102a of pulley base 120, and base 120a is clamped and fixed between aluminum rail 102a and nut 120d, thereby fixing pulley base 120 to the automatic door device base 102. A timing belt 124 is wound around the driving pulley 116 and the driven pulley 122, and the timing belt 124 is connected endlessly by a timing belt connecting tool 126. The door 106 is attached to the timing belt 124 via a connector 128 assembled to the timing belt connector 126 . According to the automatic door system 100 configured as described above, the door 106 is opened and closed by driving the timing belt 124 in the forward or reverse direction using the driving force from the motor 110. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2016-180204 Summary of the Invention [Problem to be solved by the invention]

[0004] According to the conventional automatic door system 100 described above, the timing belt 124 is connected endlessly using the timing belt connecting device 126. The timing belt connecting device 126 is also configured to allow the tension of the timing belt 124 to be adjusted, so the tension of the timing belt 124 can be adjusted according to the size and weight of the door to be installed in the building. However, after the automatic door device 100 is installed, over time the timing belt 124 is pulled by the weight of the door 106 and by the stretching caused by the timing belt 124 settling in, causing the position of the timing belt 124 to shift relative to the driven pulley 122 (see Figure 7), and causing the side edge 124a of the timing belt 124 to come into contact with the flange 122a of the driven pulley 122, resulting in a rubbing noise. This rubbing noise can be solved by putting a lubricant between the timing belt 124 and the driven pulley 122, but this does not eliminate the rubbing itself and therefore is not a fundamental solution. In addition, putting a lubricant in makes it easier for dust and dirt to adhere, which creates the problem of increasing the frequency of maintenance of the timing belt 124. This problem is not limited to automatic door systems, but also occurs in manual or semi-automatic door systems, as long as the door is attached to a belt stretched between a pair of pulleys via a connector. SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems of the conventional door device and to provide a door device having a structure capable of correcting misalignment of a timing belt relative to a pulley. [Means for solving the problem]

[0005] In order to achieve the above-mentioned object, the door device of the present invention comprises a door device base for mounting the door device to a building, and a door having an endless timing belt wound around a pair of pulleys mounted on the door device base, the door being attached to the timing belt via a connector, wherein one or both of the pulleys are rotatably mounted on a shaft fixed to the door device base via a pulley base assembly, and the pulley base assembly is configured to be able to change the angle between the rotation axis of the shaft and the extension direction of the timing belt. Furthermore, when the door device is configured as an automatic door device or semi-automatic door device using a drive unit, a drive unit having a motor and a reducer to which driving force from the motor is transmitted is provided on the door device base, one of the pair of pulleys is attached as a drive pulley to a first shaft incorporated in the reducer of the drive unit, and the other of the pair of pulleys is attached as a driven pulley so as to be rotatable on a shaft fixed to the door device base via a pulley base assembly, and the pulley base assembly on which the driven pulley shaft is attached can be configured so that the angle between the rotational axis of the driven pulley shaft and the extension direction of the timing belt can be changed. Preferably, the pulley base assembly comprises a first pulley base member and a second pulley base member fixed to a door device base so as to face each other in the extending direction of the timing belt, the first pulley base member being formed by bending a plate-like body, and comprising: a base portion extending in the extending direction of the timing belt and fixed to the automatic door device base; an upright portion rising from one end of the base in a direction perpendicular to the extending direction of the timing belt; and a shaft support portion extending in the extending direction of the timing belt from an upper end of the upright portion and to which a second shaft is fixed; and the second pulley base member being formed by bending a plate-like body into an L-shape, and comprising: a base portion extending in the extending direction of the timing belt and fixed to the door device base; and an upright portion rising from one end of the base in a direction perpendicular to the extending direction of the timing belt. the first pulley base member and the second pulley base member are arranged so that their upright portions face each other along the extension direction of the timing belt, and openings are formed in the upright portions of the first pulley base member and the second pulley base member at positions that face each other when the first pulley base member and the second pulley base member are fixed to the automatic door device base, and the pulley base assembly further comprises an adjustment bolt attached from the second pulley base member side so as to pass through the opening of the second pulley base member and the opening of the first pulley base member, and the adjustment bolt is configured to apply stress to the upright portion of the first pulley base member in the extension direction of the timing belt, thereby changing the angle between the rotation axis of the driven pulley and the extension direction of the timing belt. More preferably, the door device further includes a timing belt connecting device that connects the timing belt endlessly, the timing belt connecting device being configured to be able to adjust the tension of the timing belt, and a connecting device for attaching the door being fixed to the timing belt connecting device. [Effects of the Invention]

[0006] The door apparatus according to the present invention includes a door apparatus base for mounting the door apparatus to a building, a pair of pulleys mounted on the door apparatus base, an endless timing belt wound around the pair of pulleys, and a door attached to the timing belt via a connector, wherein one or both of the pulleys are rotatably mounted on a shaft fixed to the door apparatus base via a pulley base assembly, and the pulley base assembly is configured to change the angle between the rotation axis of the shaft and the extension direction of the timing belt, so that if the timing belt becomes misaligned with the pulley, the pulley base assembly can be used to change the angle between the rotation axis of the pulley shaft and the extension direction of the timing belt to correct the position of the timing belt with respect to the pulley. Specifically, by changing the angle between the rotation axis of the pulley shaft and the extension direction of the timing belt in a direction away from the pulley flange, the side edge of the timing belt can be moved away from the pulley flange. The above-mentioned configuration can be applied to any of manual, semi-automatic and automatic door systems, as long as the door system has a structure in which a door is attached to a belt stretched between a pair of pulleys via a connector. In the case of a manual door system, one or both of the pair of pulleys may be provided with a pulley base assembly having a structure that allows the angle between the rotation axis of the pulley shaft and the extension direction of the timing belt to be changed, and in the case of a semi-automatic or automatic door system, the pulley that functions as the driven pulley may be provided with a pulley base assembly having a structure that allows the angle between the rotation axis of the pulley shaft and the extension direction of the timing belt to be changed. When the door device is configured as an automatic door device or semi-automatic door device using a drive unit, a drive unit having a motor and a reducer to which driving force from the motor is transmitted is provided on the door device base, one of the pair of pulleys is mounted as a drive pulley on a first shaft incorporated in the reducer of the drive unit, and the other of the pair of pulleys is rotatably mounted as a driven pulley on a shaft fixed to the door device base via a pulley base assembly, and the pulley base assembly on which the driven pulley shaft is mounted is configured to be able to change the angle between the rotation axis of the driven pulley shaft and the extension direction of the timing belt, so that if the position of the timing belt relative to the driven pulley becomes misaligned, the pulley base assembly can be used to change the angle between the rotation axis of the driven pulley shaft and the extension direction of the timing belt, thereby correcting the position of the timing belt relative to the driven pulley. The pulley base assembly further includes a first pulley base member and a second pulley base member fixed to a door device base so as to face each other in the extending direction of the timing belt, the first pulley base member being formed by bending a plate-like body, and having a base portion extending in the extending direction of the timing belt and fixed to the door device base, an upright portion rising from one end of the base in a direction perpendicular to the extending direction of the timing belt, and a shaft support portion extending in the extending direction of the timing belt from an upper end of the upright portion and to which a second shaft is fixed, and the second pulley base member being formed by bending a plate-like body into an L-shape, and having a base portion extending in the extending direction of the timing belt and fixed to the door device base, and an upright portion rising from one end of the base in a direction perpendicular to the extending direction of the timing belt, and the first pulley base member and the second pulley base member being formed by bending a plate-like body into an L-shape, and having a base portion extending in the extending direction of the timing belt and fixed to the door device base, and The upright portions of the first and second pulley base members are arranged so that they face each other, and openings are formed in the upright portions of the first and second pulley base members at positions that face each other when the first and second pulley base members are fixed to the automatic door apparatus base. The pulley base assembly further includes an adjustment bolt that is attached from the second pulley base member side so as to pass through the openings in the second and first pulley base members. The adjustment bolt applies stress to the upright portion of the first pulley base member in the extension direction of the timing belt, changing the angle between the rotation axis of the driven pulley and the extension direction of the timing belt. This makes it possible to adjust the angle between the rotation axis of the driven pulley and the extension direction of the timing belt simply by adjusting the adjustment bolt, and therefore to adjust the position of the timing belt relative to the driven pulley. Furthermore, by providing a timing belt connecting device that connects the timing belt endlessly, configuring the timing belt connecting device to be able to adjust the tension of the timing belt, and fixing the connector for attaching the door to the timing belt connecting device, it becomes possible to use the timing belt connecting device to adjust the tension of the timing belt according to the size and weight of the building to which the door device is to be attached and the door, and also, after the door device is installed, it becomes possible to correct the position of the timing belt relative to the driven pulley using a pulley base assembly if necessary. [Brief explanation of the drawings]

[0007] [Figure 1] 1 is a schematic diagram showing the configuration of an automatic door system as an embodiment of a door system according to the present invention. [Figure 2] 2 is a schematic view of the pulley base assembly taken along line AA in FIG. 1. [Figure 3] 3 is a view corresponding to FIG. 2, illustrating a state in which the timing belt is displaced relative to the driven pulley. FIG. [Figure 4] 3 is a view corresponding to FIG. 2 showing a state in which the angle of the rotation axis of the driven pulley relative to the extending direction of the timing belt is changed using the pulley base assembly, thereby adjusting the position of the timing belt relative to the driven pulley. [Figure 5] FIG. 10 is a schematic diagram showing the configuration of a manual door device as a second embodiment of the door device according to the present invention. [Figure 6] FIG. 1 is a schematic diagram showing the configuration of a conventional automatic door system. [Figure 7] 7 is a schematic, partially cross-sectional view of a pulley base supporting a second shaft for a driven pulley, taken along line BB in FIG. 6. [Figure 8] 8 is a view corresponding to FIG. 7, illustrating a state in which the timing belt is misaligned with respect to the driven pulley. DETAILED DESCRIPTION OF THE INVENTION

[0008] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of a door device according to the present invention will be described with reference to the accompanying drawings. FIG. 1 is a schematic front view showing the configuration of an automatic door system as a first embodiment of a door system according to the present invention. In the figure, the symbol 1 indicates an automatic door device, which comprises an automatic door device base 2 for mounting the automatic door device 1 to a building, a drive unit 4 attached to the automatic door device base 2, and a door 6 that opens and closes using the drive unit 4. The drive unit 4 includes a motor 10 and a reducer 12 to which the driving force from the motor 10 is transmitted, and a pulley 16 that functions as a driven pulley is attached to a first shaft 14 incorporated in the reducer 12. A pulley base assembly 20 to which a second shaft 18 is fixed is fixed at a position spaced apart from the driven pulley 16 in the moving direction of the door 6, and a pulley 22 that functions as a driven pulley is rotatably provided on the shaft 18. A timing belt 24 is wound around the drive pulley 16 and the driven pulley 22, and the timing belt 24 is connected in an endless manner by a timing belt connecting tool 26. The timing belt connecting tool 26 is a conventionally known connecting tool, and is configured to connect the timing belt 24 in an endless manner so that the tension of the timing belt 24 can be adjusted. The door 6 is attached to the timing belt 24 via a connector 28 assembled to the timing belt connector 26 . According to the automatic door system 1 configured as described above, the door 6 is opened and closed by driving the timing belt 24 in the forward or reverse direction using the driving force from the motor 10.

[0009] Fig. 2 is a schematic view of the pulley base assembly 20 taken along the line AA in Fig. 1. In the figure, an arrow L indicates the direction in which the timing belt 24 extends. As shown in Figure 2, the pulley base assembly 20 comprises a first pulley base member 30, a second pulley base member 32, and a plate-shaped base member 33 to which the first pulley base member 30 and the second pulley base member 32 are fixed, and is fixed to the automatic door device base 2 so that they face each other along the extension direction L of the timing belt 24. The first pulley base member 30 is formed by bending a plate-like body in a stepped manner, and specifically comprises a base portion 30a that extends in the direction in which the timing belt 24 extends and is fixed to the automatic door device base 2, an upright portion 30b that rises from one end of the base portion 30a in a direction perpendicular to the direction in which the timing belt 24 extends, and a shaft support portion 30c that extends from the upper end of the upright portion 30b in the direction in which the timing belt 24 extends and to which the second shaft 18 is fixed. The second pulley base member 32 is formed by bending a thicker plate-like material than the plate-like material of the first pulley base member 30 into an L-shape, and specifically comprises a base portion 32a that extends in the extension direction of the timing belt 24 and is fixed to the automatic door device base 2, and an upright portion 32b that rises from one end of the base portion 32a in a direction perpendicular to the extension direction of the timing belt 24. The first pulley base member 30 and the second pulley base member 32 are fixed to a plate-shaped base base member 33 so that the upright portions 30b and 32b thereof face each other. In the pulley base assembly 20 constructed as described above, the first pulley base member 30 and the second pulley base member 32 are positioned in the extension direction of the timing belt 24 so that their upright portions 30b and 32b face each other, and are fixed to a pair of aluminum rails 2a formed integrally with the automatic door device base 2 together with the plate-shaped base base member 33 at the positions of the bases 30a and 32a with nuts 30d and 32c via a fixed base member (not shown, see bottom plate 103b and bolt 103a in Figures 7 and 8) with bolts erected on the bottom plate. Openings (not indicated by a reference numeral) are formed in the upright portions 30b and 32b of the first and second pulley base members 30 and 32 at positions that face each other when the first and second pulley base members 30 and 32 are fixed to the automatic door apparatus base 2, and burring is applied to a portion 30e of the upright portion 30b of the first pulley base member 30 that corresponds to the opening. Of course, instead of burring the burred portion 30e, a nut member may be attached integrally to the burred portion 30e. The pulley base assembly 20 further includes an adjustment bolt 34 attached from the second pulley base member 32 side so as to pass through the opening of the second pulley base member 32, the opening of the first pulley base member 30, and the nut member 30e. In Figure 2, reference numeral 36 denotes a nut member that is screwed onto the adjustment bolt 34. In the pulley base assembly 20 configured as described above, the second shaft 18 is fixed to the shaft support portion 30c of the first pulley base member 30 in a direction perpendicular to the extending direction of the timing belt 24, and the driven pulley 22 around which the timing belt 24 is wound is rotatably attached to the second shaft 18. Therefore, the axis of the second shaft 18 and the rotation axis of the driven pulley 22 coincide with each other, and these axes are indicated by the symbol S in FIG. The extension direction L of the timing belt 24, which is wound around the driven pulley 22 and the drive pulley 16 configured as described above, is parallel to the extension direction of the automatic door device base 2, and the angle between the axis S and the extension direction L of the timing belt 24, i.e., the angle between the axis S and the automatic door device base 2, is indicated by the symbol α in Figure 2.

[0010] With the automatic door system 1 configured as described above, over time after installation of the automatic door system 1, the position of the timing belt 24 relative to the driven pulley 22 may shift to one side of the flange 22a of the driven pulley 22 due to, for example, the weight of the door 6 or stretching due to wear of the timing belt. As shown in FIG. 3, in this case, when one side edge 24a of the driven pulley 22 finally comes into contact with one side of the flange 22a of the driven pulley 22, tightening the adjustment bolt 34 of the pulley base assembly 20 in one direction will cause the timing belt 24 to move to the upright portion 30b of the first pulley base member 30. Stress F is applied in the extension direction L of timing belt 24. Specifically, stress F is applied toward second pulley base member 32, causing upright portion 30b and shaft support portion 30c of first pulley base member 30 to tilt toward second pulley base member 32. As a result, angle α1 on the second pulley base member 32 side between the axis of second shaft 18, i.e., rotation axis S of driven pulley 22, and extension direction L of timing belt 24 becomes smaller than angle α before adjustment, and the position of timing belt 24 relative to driven pulley 22 can be moved toward the center of driven pulley 22 (see FIG. 4). In Figure 4, the inclination of the upright portion 30b and the shaft support portion 30c of the first pulley base member 30 is exaggerated to make the inclination of the rotation axis S of the driven pulley 22 easier to see, but in reality, even if this inclination is not visible to the naked eye, it will be understood by those skilled in the art that the position of the timing belt 24 relative to the driven pulley 22 can be moved toward the center of the driven pulley 22. This allows the timing belt 24 to be separated from one of the flanges 22a of the driven pulley 22, eliminating problems such as rubbing noise and wear of the timing belt 24 caused by the timing belt 24 coming into contact with the driven pulley 22.

[0011] Next, with reference to FIG. 5, a description will be given of an embodiment of a manual door device as a second embodiment of the door device according to the present invention. 5 is a schematic front view showing the configuration of a manual door system 1'. This manual door system 1' has the same basic structure as the automatic door system 1 of the first embodiment, except that it does not have a drive unit 4. Therefore, components with the same or equivalent functions as the automatic door system 1 of the first embodiment will be described using the same reference numerals with a comma added. This manual door device 1' comprises a door device base 2' for mounting the manual door device 1' to a building, a pair of pulleys 22' provided on the door device base 2', a timing belt 24' wound between the pair of pulleys 22', and a door 6' attached to the timing belt 24' via a connector 28' assembled to a timing belt connector 26'. The timing belt 24' is connected endlessly by a timing belt connecting tool 26'. In the manual door device 1' configured as described above, the pair of pulleys 22' are each attached to the door device base 2' via a pulley base assembly 20' having the same structure as in the first embodiment, and the pulley base assembly 20' is configured so that the rotation axis of the shaft of the pulley 22', i.e., the rotation axis of the pulley 22', can be changed with respect to the extension direction L of the timing belt 24', as needed.

[0012] The above-described embodiments have been described using examples of an automatic door system and a manual door system to explain the door system of the present invention, but it goes without saying that the door system of the present invention can also be applied to a semi-automatic door system. In addition, in the above-described embodiment, a pulley base assembly consisting of a first pulley base member and a second pulley base member is used, and stress is applied to the first pulley base member that supports the pulley shaft, thereby changing the rotation axis of the shaft relative to the extension direction of the timing belt. However, this configuration is not limited to the above-described embodiment, and any configuration may be used as long as it is configured to be able to change the angle α between the rotation axis S of the pulley, i.e., the rotation axis S of the shaft that supports the pulley, and the extension direction L of the timing belt. For example, it may be configured to change the angle α between the rotation axis S of the pulley, i.e., the rotation axis S of the shaft that supports the pulley, and the extension direction L of the timing belt, by adding a spacer or the like between the base of the pulley base that supports the shaft and the door device base (specifically, an aluminum rail provided on the door device base). [Explanation of symbols]

[0013] 1 Automatic door device 2 Automatic door device base 4 Drive Unit 6 doors 10 Motor 12 Reducer 14 First shaft (for driving pulley) 16 Drive pulley 18 Second shaft (for driven pulley) 20 Pulley base assembly 22 driven pulley 22a flange 24 Timing belt 24a Side edge 26 Timing belt connecting tool 28 Connector 30 First pulley base member 30a base 30b Upright part 30c Shaft support 30d bolt 30e Burring processing part 32 Second pulley base member 32a base 32b Upright part 32c bolt 33 Plate-shaped base pedestal member 34 Adjustment bolt 36 Nut material L Timing belt extension direction S Rotation axis of driven pulley α is the angle between the rotation axis S of the driven pulley and the extension direction L of the timing belt F Stress applied to the upright part of the first pulley base member by the adjustment bolt 1' Manual door device 2' Door Device Base 6' Door 20' Pulley base assembly 22' Pulley 24' timing belt 26' Timing Belt Connection Tool 28' Connector 100 Automatic door device 102 Automatic door device base 102a Guide rail 103a Seat board 103b Bolt 104 Drive Unit 106 Doors 110 Motor 112 Reducer 114 First shaft (for driving pulley) 116 Drive pulley 118 Second shaft (for driven pulley) 120 flange 120a base 120b Upright part 120c shaft support 120d nut 122 driven pulley 122a flange 124 Timing belt 124a Side edge 126 Timing belt connecting tool 128 Connector L1 Timing belt extension direction

Claims

1. a door device base for attaching the door device to a building; An endless timing belt is wound around a pair of pulleys provided on the door device base, and a door is attached to the timing belt via a connector. In a door device comprising: One or both of the pulleys are rotatably mounted on a shaft fixed to a door device base via a pulley base assembly, The pulley base assembly is configured to be able to change the angle between the rotation axis of the shaft and the extending direction of the timing belt. A door device characterized by:

2. a drive unit having a motor and a reducer to which driving force from the motor is transmitted, provided on the door device base; One of the pair of pulleys is assembled as a drive pulley to a first shaft incorporated in a reducer of the drive unit, the other of the pair of pulleys is rotatably provided as a driven pulley on a shaft fixed to a door device base via a pulley base assembly, The pulley base assembly is configured to be able to change the angle between the rotation axis of the shaft of the driven pulley and the extending direction of the timing belt.

2. The door device according to claim 1.

3. The pulley base assembly is a first pulley base member and a second pulley base member fixed to the door device base so as to face each other along the extending direction of the timing belt; the first pulley base member is formed by bending a plate-like body, and includes a base portion extending in the extension direction of the timing belt and fixed to the door device base, an upright portion standing from one end of the base portion in a direction perpendicular to the extension direction of the timing belt, and a shaft support portion extending from an upper end of the upright portion in the extension direction of the timing belt and to which the second shaft is fixed, the second pulley base member is formed by bending a plate-like body into an L-shape, and includes a base portion extending in the extension direction of the timing belt and fixed to the door device base, and an upright portion rising from one end of the base portion in a direction perpendicular to the extension direction of the timing belt, the first pulley base member and the second pulley base member are arranged in an extending direction of the timing belt such that their upright portions face each other; an opening is formed in each of the upright portions of the first pulley base member and the second pulley base member at a position facing each other when the first pulley base member and the second pulley base member are fixed to the door device base; the pulley base assembly further includes an adjustment bolt attached from the second pulley base member side so as to pass through the opening of the second pulley base member and the opening of the first pulley base member, The adjustment bolt is configured to apply stress in the extension direction of the timing belt to the upright portion of the first pulley base member, thereby changing the angle between the rotation axis of the driven pulley and the extension direction of the timing belt.

3. The door device according to claim 1 or 2.

4. a timing belt connecting tool for connecting the timing belt in an endless manner; The timing belt connecting tool is configured to be able to adjust the tension of the timing belt, The door attachment connector is fixed to the timing belt connector.

3. The door device according to claim 1 or 2.

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