Electrically driven door device

Abstract

To prevent driven teeth 13b of a transmission body 13 that mesh with drive teeth 10a of a drive wheel 10 provided on an output casing part 9b of an opening / closing mechanism 9 from jumping in an electrically driven door device that is attached to an entrance E of a toilet booth 1.SOLUTION: A tooth jumping prevention is configured by providing a tooth jumping prevention portion 14e on a lower piece portion 14c of a bracket member 14, which is assembled in a surrounding state to the outer periphery of an output casing portion 9b, in such a manner of being closely opposed to the a meshing portion between drive teeth 10a and driven teeth 13b.SELECTED DRAWING: Figure 7

Description

[Technical field]

[0001] The present invention relates to the technical field of an electric door device that is installed to open and close the entrances and exits of booths (small rooms) such as toilet booths and shower booths, as well as rooms in houses and condominiums. [Background technology]

[0002] Today, as door devices that can be installed at the entrances of booths such as toilet booths or building entrances, not only flat door bodies are known, but also hanger rail type door devices in which a door body that is arc-shaped in plan view slides left and right along the arc trajectory of a guide rail to open and close the entrance. Among such door devices, there have been known in the past that use an electric open / close mechanism to automatically open and close the door body. In these conventional electric door devices, the open / close mechanism is provided on the main body side with a drive wheel having drive teeth formed on its outer periphery, while the door body side is provided with a transmission body (transmission belt (timing belt)) having driven teeth that mesh with the drive teeth. The drive wheel rotates forward and backward when driven by the open / close mechanism, thereby moving the transmission body left and right, thereby automatically opening and closing the door body (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent Publication No. 2022-25301 Summary of the Invention [Problem to be solved by the invention]

[0004] In the conventional system, the transmission body is arranged along a guide body disposed above the door body, while the drive wheel is attached between the guide body and the transmission body, spaced apart from the guide body, so that the drive teeth and driven teeth mesh with each other. In this case, however, it is necessary to take measures to prevent the driven teeth from skipping relative to the drive teeth. For this reason, in the conventional system, the attachment position of the opening and closing machine relative to the transmission body is adjusted so that the transmission body is in a predetermined tension state, thereby preventing the skipping phenomenon of the driven teeth. However, since the installation of the opening and closing mechanism is carried out on-site, installation errors are unavoidable, and it is assumed that the transmission body will become loose from a predetermined tension state due to reasons such as the transmission body stretching over a long period of use. If the transmission body becomes loose, there is a risk that the driven teeth will jump when the opening and closing mechanism is driven to open and close, and if such a phenomenon occurs, there is a risk that it will interfere with the smooth opening and closing control of the door body. These are the issues that the present invention aims to solve. [Means for solving the problem]

[0005] The present invention has been created in view of the above-mentioned circumstances and with the aim of solving these problems. The invention of claim 1 is an electric door device comprising a guide rail arranged above an entrance, a hanger-type door body which is guided by the guide rail to open and close in the left-right direction relative to the entrance, and an opening and closing machine which is provided on the main body side and is electrically driven to open and close the door body, the door body comprising a long transmission body whose both left and right end portions are connected to the door body, the opening and closing machine comprising a drive wheel having drive teeth formed on its outer periphery and which rotates forward and reverse due to the electric drive, the transmission body comprising driven teeth which mesh with the drive teeth, the opening and closing movement of the door body being performed by the drive wheel whose drive teeth are meshed with the driven teeth rotating forward and reverse in conjunction with the electric drive, characterized in that a tooth jump prevention portion which prevents the tooth jump of the driven tooth relative to the drive tooth is disposed opposite the drive tooth meshing portion of the driven tooth. The invention of claim 2 is an electric door device as described in claim 1, characterized in that a guide body is provided above the door body in a state following the movement trajectory of the door body, the transmission body is provided in a state following the guide body, the drive wheel body is spaced apart from the guide body and disposed between the guide body and the transmission body so that the driven teeth mesh with the drive teeth, and the tooth skipping prevention unit is provided in the output casing part of the opening and closing machine from which the output shaft of the drive wheel body protrudes. The invention of claim 3 is an electric door device as described in claim 2, characterized in that the output casing portion has an output shaft protruding downward, and a bracket material having a U-shaped bracket main body with both leg pieces and an upper spanning piece, and a lower piece that is fastened between the lower ends of the both leg pieces while being arranged between the driving wheel and the output casing portion, is externally fitted and assembled to surround the output casing portion, and the tooth skipping prevention portion is formed to protrude downward from the lower piece. The invention of claim 4 is an electric door device as described in claim 3, characterized in that the door body and the guide body are arc-shaped so as to follow an arc-shaped trajectory, the guide rail guides the opening and closing of the door body so as to follow the arc-shaped trajectory, the transmission body is arranged along the outer peripheral surface of the guide body and hung around the drive wheel so as to be tangent to the drive wheel on both the left and right sides, and the tooth skipping prevention portion is arranged opposite to the top portion of the transmission body hung in the tangential state. The invention of claim 5 provides the electric door device according to claim 4, characterized in that the tooth skipping regulating portion is disposed opposite to a top portion of the power transmission body of either one of the lower pieces. The invention of claim 6 is an electric door device as described in claim 5, characterized in that the door device has left-pull and right-pull specifications that open the entranceway by moving the door body in one direction to the left or the other relative to the entranceway, and the opening / closing mechanism is provided on the rear-end structure member of the entranceway, and the tooth skipping prevention unit is attached to the output casing unit with a lower piece that is opposite to the left and right, thereby accommodating the left and right entranceway. The invention of claim 7 is an electric door device as described in claim 4, characterized in that the door device has left-pull and right-pull specifications that open the entranceway by moving the door body in one direction to the left or the other to the left, and the opening / closing mechanism is provided on the rear-end structure member of the entranceway with left and right halves, and the tooth skip prevention part is provided in the corresponding portion of the lower half of the doorway to accommodate left and right entrances with left and right halves. Effect of the Invention

[0006] According to the invention of claim 1, a door device is provided which comprises a guide rail, a door body which is guided by the guide rail to open and close an entrance, and an opening / closing machine which electrically drives the opening and closing movement of the door body, in which the drive teeth of a drive wheel provided on the opening / closing machine are engaged with the driven teeth of a long-shaped transmission body provided on the door body, and the door body is opened and closed by the forward and reverse rotation of the drive wheel provided on the opening / closing machine. As a result, a tooth skipping prevention unit is provided opposite the meshing portion of the drive teeth and the driven teeth. Therefore, even if there is a risk that tooth skipping will occur between the driven teeth and the drive teeth due to assembly errors or the like, the tooth skipping is prevented, and it is possible to prevent impairing smooth opening and closing control. By making use of the invention of claim 2, the transmission body is arranged along a guide body provided above the door body, the drive wheel is separated from the guide body, and the drive teeth mesh with the driven teeth between the guide body and the transmission body. In this state, the tooth skipping prevention unit is provided in the output casing portion of the opener / closer from which the output shaft of the drive wheel protrudes. As a result, the tooth skipping prevention unit is provided by effectively utilizing the output casing portion of the opener / closer, which contributes to simplifying the structure. By making use of the invention of claim 3, a bracket material having a U-shaped bracket main body and a lower piece that is fastened between the lower ends of both leg pieces of the bracket main body is externally fitted and assembled in a surrounding state to the output casing section from which the output shaft of the driving wheel protrudes downward, and the tooth skipping prevention section is formed to protrude downward from the lower piece.As a result, the tooth skipping prevention section is not provided directly on the output casing, but is provided via the bracket material that is externally fitted and assembled in a surrounding state around the output casing section, and the tooth skipping prevention section can be easily provided without having to drill holes for fasteners in the output casing section one by one. By adopting the invention of claim 4, when the door device is an arc-shaped one in which the door body is opened and closed along an arc trajectory, the transmission body is suspended tangentially from the drive wheel body while being arranged along the outer peripheral surface of the guide body provided on the door body, and as a result of the tooth skipping prevention portion being arranged opposite the top portion of the suspension of the transmission body, tooth skipping can be efficiently prevented in the arc-shaped door device. By adopting the invention of claim 5, the tooth skipping prevention portion is arranged opposite the top portion of one of the transmission bodies on the lower piece portion of the bracket material, thereby simplifying the configuration of the tooth skipping prevention portion. By making use of the invention of claim 6, if the door device has left-hand and right-hand pull specifications that open the entrance and exit by moving the door body in one direction or the other in the left-right direction, the opening and closing mechanism will be installed on different left and right door end side body members due to the different specifications.In this case, the tooth skipping prevention unit can be made to accommodate left and right differences by having the lower piece attached to the output casing part in a left-right different direction, and by preparing one type of lower piece, it is possible to accommodate left and right differences, thereby avoiding an increase in the number of parts and also allowing for different assembly. By adopting the invention of claim 7, if the door device has left-hand and right-hand pull specifications that open and close the entrance by moving the door body in one direction or the other in the left-right direction, the opening and closing mechanism will be installed on different left and right door end side body members due to the differences in specifications.In this case, the tooth skip prevention part is installed in the parts corresponding to both leg pieces of the lower half and corresponds to the left and right sides.As a result, by preparing one type of lower half, it is possible to accommodate the left and right sides, which avoids an increase in the number of parts and eliminates assembly errors. [Brief description of the drawings]

[0007] [Figure 1] FIG. [Diagram 2] This is a front view of the toilet booth. [Diagram 3] FIG. [Figure 4] This is a vertical cross-sectional side view of a toilet booth. [Diagram 5] FIG. 2 is a front view of a portion of the door body where an opening / closing mechanism is installed. [Figure 6] 1A and 1B are a plan view and a side view of the switchgear section. [Figure 7] FIG. [Figure 8] 1A and 1B are a front view and a side view of the opening / closing mechanism. [Figure 9] 1A and 1B are a bottom view and a plan view of the opening and closing mechanism. [Figure 10] 1A, 1B, and 1C are a front view, a plan view, and a side view of the bracket main body. [Figure 11] (A), (B), and (C) are a front view, a plan view, and a side view of the lower piece, and (D) and (E) are a front view and a side view of the bracket material. [Figure 12] FIG. 11 is a plan view of a toilet booth according to a second embodiment. [Figure 13] FIG. [Figure 14] FIG. 2 is a front view of a portion of the door body where an opening / closing mechanism is installed. [Figure 15]1A and 1B are a plan view and a side view of the switchgear section. [Figure 16] 13A and 13B are a side view of a switchgear portion and a side view of a bracket member according to a third embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0008] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In the drawings, 1 is a toilet booth, and the toilet booth 1 is provided in a state where a plurality of toilet booths 1 are adjacent to each other on the left and right, and is partitioned by providing front panel bodies 2, 3 on the door end side and the door end side, which are erected from a floor surface F with a left and right gap as an entrance (opening) E on the front (front) side, and a side (depth) panel body 4, which is provided so as to abut the front end (front end) of the front panel bodies 2, 3 and partitions between the front panel bodies 2, 3 and the wall surface or other structural body side W at the back end of the toilet booth, all as in the conventional manner. Incidentally, in such a booth, one or both of the side panels may be configured as a structural body surface such as a wall, and these are implemented appropriately as necessary. Incidentally, T is a toilet bowl provided in the toilet booth 1.

[0009] Reference numeral 5 denotes a hanger-type door body (door body, gate body) having an arc shape in a plan view, and left and right hanger rollers (suspension rollers) 6 are provided on the left and right upper edge parts of the door body 5 in a state of protruding upward via connecting metal fittings 6a, and the hanger rollers 6 are rolled and guided by a guide rail (hanger rail, guide rail) 7 provided in the upper part of the entrance E, so that the door body 5 moves left and right to open and close the entrance E, forming a hanger type. Incidentally, the door body 5 is configured so that a gap is left between the lower edge and the floor surface F. The guide rail 7 has an arcuate movement trajectory that corresponds to the arcuate shape of the door body 5, and is arcuate in shape so as to enter the booth of the toilet booth 1 above the entranceway E, passing from the door-leading side front panel body 2 located at the door-leading edge of the entranceway E, over the door-leading side front panel body 3 located at the door-leading edge, along the door-leading side side panel body 4, and the guide rail 7 is configured to be provided on the main body by being connected to main body side members such as the left and right front panel bodies 2, 3 and the side panel body 4 via support brackets 7a.

[0010] With this configuration, the door body 5 is capable of sliding left and right along an arcuate trajectory as the hanger roller 6 rolls horizontally left and right on the guide rail 7, thereby transforming into a closed position in which it closes the entrance / exit E, and an open position in which it enters the toilet booth 1 on the door tail side and opens (opens) the entrance / exit E. Incidentally, in this embodiment, for the sake of convenience, a specification in which the entrance / exit E is closed by moving the door body 5 to the right when viewed from outside the entrance / exit E (outside the booth of the toilet booth 1) is defined as a right-pull specification, and a specification in which the entrance / exit E is closed by moving the door body 5 to the left is defined as a left-pull specification, and a distinction is made between the specifications; first, the right-pull specification will be described in detail, and the left-pull specification will be described later.

[0011] In this device, various components and devices, including an opening / closing mechanism 9 that opens and closes the door body 5 by electric power, are arranged in the space above the guide rail 7, and the configuration of these components will be described in detail below. First, a pair of support brackets 7a are attached to the upper ends of the trailing edge front panel body 3 and the side panel body 4 on that side with a gap between them, and the guide rails 7 are attached to the undersides of the front and rear support brackets 7a via fasteners 7b, and the front and rear lower pieces 8a, 8b of a mounting bracket 8 are attached to the upper surface of the support bracket 7a in a state where they are fastened together with the guide rails 7 by the fasteners 7b, and an opening / closing device 9 is attached to the vertical piece 8c of the mounting bracket 8. In this case, mounting holes 8aa, 8ba through which the fasteners 7b pass are formed in the front and rear lower pieces 8a, 8b of the mounting bracket 8. The rear mounting hole 8ba formed in the rear lower piece 8b is simply a round hole, whereas the front mounting hole 8aa formed in the front lower piece 8a is an elongated arc-shaped hole centered on the rear mounting hole 8ba. This allows the mounting bracket 8, together with the opening / closing device 9, to freely adjust the mounting position of the front portion in the left-right direction with the rear mounting hole 8ba as the axis.

[0012] The opening / closing machine 9 attached to the mounting bracket 8 comprises a main casing portion 9a at the rear of the booth which houses a motor portion (not shown), and an output casing portion 9b at the front of the booth which houses a reduction mechanism (e.g. a worm reduction mechanism (not shown)) which slows down the rotational drive of the motor portion. In this case, the opening / closing machine 9 is attached so that the main casing portion 9a, which is long in the front-to-rear direction, is longer in the front-to-rear direction and is slightly inclined so that it approaches the side panel body 4 on the door end side as it approaches the rear of the booth. An output shaft 9c, which has been reduced in speed by the reduction mechanism, protrudes from the underside of the front output casing portion 9b, and a drive wheel 10 having drive teeth 10a formed on its outer periphery is attached to the output shaft 9c.

[0013] Meanwhile, the upper edge of the door body 5 is provided with lower end portions 11a of left and right L-shaped connecting members 11 which are fastened together with the connecting fittings 6a of the left and right hanger rollers 6, and the vertical piece portions 11b of the left and right connecting members 11 are provided with long arc-shaped guide bodies 12 which are arranged upwardly and along the inner peripheral edge of the arc-shaped locus of the guide rail 7. Furthermore, a transmission body (toothed belt) 13 is disposed on both left and right edge portions of the guide body 12 in a state of running along (facing) the arcuate outer peripheral surface 12a of the guide body 12, and the transmission body 13 is attached to the guide body 12 via holders 12b provided at both left and right edge portions of the guide body 12. In this case, the transmission body 13 is not in a state of tension with respect to the outer peripheral surface 12a of the guide body 12, but is attached in a relaxed state so that the drive wheel 10 is disposed between the transmission body 13 and the guide body 12, as will be described later.

[0014] The transmission body 13 has driven teeth 13b that mesh with the drive teeth 10a provided on the drive wheel 10 formed on the side facing the guide body 12. In this case, the drive wheel 10 is disposed so as to be sandwiched between the guide body 12 on the inside in the left-right direction and the outer transmission body 13 in a state where it is spaced outward in the left-right direction from the guide body 12 (facing each other with a gap), and by being configured in this manner, the transmission body 13 is suspended on the drive wheel 10 in a state where the meshing portion between the drive teeth 10a and the driven teeth 13b is spaced outward in the left-right direction from the guide body 12 and is tangent to the drive wheel 10 on both front-rear directions. In this case, as described above, the opening / closing mechanism 9 is configured so that the mounting position of the mounting bracket 8, together with the opening / closing mechanism 9, can be adjusted in the left-right direction by adjusting the mounting position relative to the front mounting hole 8aa, which has the rear mounting hole 8ba as its axis, thereby enabling the position of the front output casing section 9b to be adjusted in the left-right direction, thereby enabling the tension of the transmission body 13 to be adjusted.

[0015] The opening and closing machine 9 configured in this manner further includes a tooth jump prevention portion 14e for preventing the driven tooth 13b from jumping relative to the drive tooth 10a, which is provided in close proximity to the portion where the drive tooth 10a and the driven tooth 13b mesh, specifically, the top portion of the transmission body 13 which is tangentially suspended from the drive wheel 10. Specifically, the tooth skipping regulating portion 14e is provided in the output casing portion 9b of the opening / closing device 9, and the output casing portion 9b has a rectangular shape with left and right side portions 9ba and upper and lower surface portions 9bb, 9bc. The output casing portion 9b is fitted with a bracket material 14 formed in a rectangular shape by a bracket main body portion 14a having a straddling portion 14aa and left and right leg portions 14ab, and a lower portion 14c attached via a fastener 14d between the lower end edges of the left and right leg portions 14ab in the open state of the bracket main body portion 14a.

[0016] More specifically, the bracket main body 14a has a linearly symmetrical shape in the front-to-back and left-to-right directions, and the lower end edges of the left and right leg pieces 14ab are formed with branched piece portions 14ac that branch off front-to-back, and the lower end edges of the branched piece portions 14ac are bent inward in the left-to-right direction to provide attachment piece portions 14ad. The U-shaped bracket main body 14a is then fitted onto the output casing part 9b with the spanning piece 14aa facing the upper surface 9bb of the output casing part 9b and the left and right leg pieces 14ab facing the left and right side surface parts 9ba, so that the mounting piece 14ad, which forms the lower end edge of the bracket main body 14a, is positioned between the driving wheel 10 and the lower surface 9bc of the output casing part 9b. By placing the lower piece 14c against the mounting piece 14ad from below and fastening the lower piece 14c to the mounting piece 14ad via fastener 14d, the bracket material 14 is assembled in an externally fitted state surrounding the output casing portion 9b, and a tooth skipping prevention portion 14e is formed on the lower piece 14c of the assembled bracket material 14 so as to protrude downwardly so as to face the portion where the drive tooth 10a and driven tooth 13b mesh, thereby preventing the driven tooth 13b from skipping from the drive tooth 10a.

[0017] In the present embodiment configured as described above, the door device includes a guide rail 7 that guides movement along an arcuate locus, and an arcuate door body 5 that moves left and right while being guided by the guide rail 7 to open and close the entrance E, and the opening and closing movement of the door body 5 is performed by driving an electric opening and closing device 9. In this case, the door body 5 is provided with an arcuate guide body 12 that follows the arcuate locus of the guide rail 7, while the left and right end edges of a long transmission body 13 are attached to the left and right end edges of the guide body 12 in a state along the outer circumferential surface of the guide body 12, and the driven teeth 13b of the transmission body 13 are meshed with the driving teeth 10a of the driving wheel body 10 provided on the output shaft 9c that protrudes from the lower surface 9bc of the output casing part 9b of the opening and closing device 9, and the transmission body 13 is moved left and right in conjunction with the forward and reverse rotation of the driving wheel body 10 accompanying the electric drive of the opening and closing device 9, whereby the door body 5 is automatically opened and closed. In this case, the tooth skipping prevention portion 14e is disposed opposite the meshing portion between the drive tooth 10a of the drive wheel 10 and the driven tooth 13b of the transmission body 13. As a result, even if there is a risk of tooth skipping occurring between the driven tooth 13b and the drive tooth 10a due to an assembly error or the like, the tooth skipping is prevented, thereby preventing the smooth opening and closing control from being impaired.

[0018] Moreover, in this device, the transmission body 13 is supported along the guide body 12 provided above the door body 5, and the portion of the drive wheel 10 that engages with the transmission body 13 is closely opposed to the tooth skipping prevention portion 14e, which is provided in the output casing portion of the opening / closing device from which the output shaft of the drive wheel protrudes.As a result, the tooth skipping prevention portion 14e is provided by effectively utilizing the output casing portion 9b of the opening / closing device 9, which contributes to simplifying the structure. In this case, a bracket material 14 having a U-shaped bracket main body portion 14a and a lower piece portion 14c fastened between the lower ends of the bracket main body portion 14a is fitted around the output casing portion 9b, from which the output shaft 9c for attaching the driving wheel 10 protrudes downward, and the tooth skipping prevention portion 14e is formed to protrude downward from the lower piece portion 14c.As a result, the tooth skipping prevention portion 14e is not provided directly on the output casing 9b, but is provided via the bracket material 14 which is fitted around the output casing portion 9b in a surrounding state.As a result, the tooth skipping prevention portion 14e can be easily provided without having to drill holes for fasteners in the output casing portion 9b one by one.

[0019] Moreover, the door device of this embodiment is arc-shaped, with the door body 5 opening and closing along an arc trajectory, and the transmission body 13 is suspended tangentially from the drive wheel body 10 while being arranged along the outer peripheral surface of the guide body 12 provided on the door body. In this case, the tooth skipping prevention portion 14e is disposed opposite the top portion of the suspension of the transmission body 13, so that tooth skipping can be efficiently prevented in the arc-shaped door device. In this case, the tooth skipping prevention portion 14e formed on the lower piece 14c of the bracket material 14 is arranged opposite the engagement apex portion of the transmission body 13 that engages with the driving wheel 10, thereby simplifying the configuration of the lower piece 14c on which the tooth skipping prevention portion 14e is formed.

[0020] As described above, the embodiment is a right-pull type, but the present invention can be implemented in the same way with a left-pull type. The left-pull type will be described as a second embodiment with reference to Figures 12 to 15. The pull symbols are the same as those in the first embodiment. In this left-pull type, the entrance E is closed by the door body 5 moving leftward when viewed from outside the booth, and for this reason, the opening / closing mechanism 9 is attached in a back-and-forth manner to the corner between the right-side trailing edge front panel body 3 and the side panel body 4, which is the trailing edge of the door, in the opposite direction to that of the first embodiment. As a result, the meshing portion of the transmission body 13 with the drive wheel 10 is on the opposite side in the left-right direction from that in the right-pull specification of the first embodiment, and therefore the opening / closing machine 9 in which the tooth skipping prevention portion 14e is formed on the left side of the first embodiment cannot be used as is for the left-pull specification.

[0021] Therefore, the bracket material 14 is configured so that it can be used in either a right-pull type or a left-pull type where the entrance / exit E is on the opposite side to the left. Specifically, the bracket main body 14a and the lower piece 14c without the tooth skipping prevention portion 14e (omitted state) are configured to have a line-symmetrical shape in the front, rear, left and right directions as described above. Therefore, the bracket main body 14a can be fitted to the output casing 9b regardless of whether it is on the left or right side, and when the lower piece 14c is attached to the bracket main body 14a that has been fitted to the outside, the lower piece 14c can be attached in a state in which the tooth skipping prevention portion 14e is positioned on the side facing the meshing portion between the drive tooth 10a and the driven tooth 13b arranged on either the left or right side. In this way, the lower piece 14c on which the tooth skip prevention portion 14e is provided is attached to the output casing portion 9b in a state that corresponds to left and right handedness, and by preparing one type of lower piece 14c, it is possible to correspond to left and right handedness, thereby avoiding an increase in the number of parts and also allowing for incorrect assembly.

[0022] In the first and second symmetrical left and right embodiments, the tooth skipping prevention portion 14e provided on the output casing portion 9b of the opening / closing mechanism 9 is provided on either the left or right side of the lower piece 14c, which is a component of the bracket material 14, and this configuration is used in both the first and second embodiments. However, this is not limited to this, and as in the third embodiment shown in Figure 16, the tooth skipping prevention portion 14e can be provided on both the left and right sides of the lower piece 14c to accommodate symmetrical left and right specifications. In this way, the lower piece 14c can be attached without considering the position of the meshing portion, and assembly errors can be prevented. [Industrial Applicability]

[0023] The present invention can be used in an electric door device that is installed at the entrance of a booth (room) such as a toilet booth or a shower booth, or further at the entrance of a building such as a building. [Explanation of symbols]

[0024] 1 Toilet booth 5 Door body 6 Hanger roller 7 Guide rail 9. Opening and closing mechanism 9a Main casing 9b Output casing section 9c Output shaft 10 Driving Wheel 10a Drive teeth 12 Guide body 13 Power Transmission Body 13b Driven teeth 14 Bracket material 14a Bracket body 14c Lower piece 14e Tooth skipping prevention part E Entrance / Exit

Claims

1. A guide rail is disposed above the entranceway, a hanger-type door body is guided by the guide rail and moves to open and close in the left-right direction relative to the entranceway, and an opening / closing mechanism is provided on the main body and electrically driven to open and close the door body. The door body includes an elongated power transmission body whose both left and right edge portions are connected to the door body, The opening and closing machine includes a drive wheel having drive teeth formed on an outer periphery thereof and rotated forward and backward by the electric drive, the transmission body includes driven teeth that mesh with the drive teeth, In an electric door device configured such that the opening and closing movement of a door body is performed by a drive wheel having a drive tooth meshed with a driven tooth rotating forward and backward in conjunction with the electric drive, 1. An electrically operated door device, comprising: a tooth jump prevention portion disposed opposite a driven tooth at a portion where the driven tooth engages with the drive tooth, for preventing the driven tooth from jumping relative to the drive tooth.

2. A guide body is provided above the door body so as to follow the path of movement of the door body, The transmission body is provided along the guide body, the drive wheel is spaced apart from the guide body and disposed between the guide body and the transmission body, and the driven teeth mesh with the drive teeth; 2. The electric door device according to claim 1, wherein the tooth skipping regulating portion is provided in an output casing portion of the opening / closing device from which an output shaft of the driving wheel protrudes.

3. The output casing portion has an output shaft protruding downward, A bracket material including a bracket body having a U-shaped shape with two leg pieces and an upper straddling piece, and a lower piece that is fastened between the lower ends of the two leg pieces while being disposed between the drive wheel and the output casing, is fitted around and assembled to the output casing in a surrounding state; 3. The electric door device according to claim 2, wherein the tooth skipping prevention portion is formed to protrude downward from the lower piece.

4. The door body and the guide body are formed in an arc shape so as to follow the arc trajectory. The guide rail guides the door body to open and close along the arc trajectory, The transmission body is disposed along the outer peripheral surface of the guide body, and is hung around the drive wheel so as to be tangent to the drive wheel on both the left and right sides; 4. The electric door device according to claim 3, wherein the tooth skipping prevention portion is disposed opposite to a top portion of the power transmission body that is tangentially suspended.

5. 5. The electric door device according to claim 4, wherein the tooth skipping prevention portion is disposed opposite to a top portion of the power transmission body of either one of the lower pieces.

6. The door device has left-hand and right-hand pull specifications that open the entrance by moving the door body in one direction to the left or the other direction to the left or right, The opening and closing mechanism is installed on the rear frame of the door at the left and right side of the entrance.

6. The electric door device according to claim 5, wherein the tooth skipping prevention portion is adapted to accommodate left and right entrances by having the lower portions attached to the output casing portion in opposite directions.

7. The door device has left-hand and right-hand pull specifications that open the entrance by moving the door body in one direction to the left or the other direction to the left or right, The opening and closing mechanism is installed on the rear frame of the door at the left and right side of the entrance.

5. The electric door device according to claim 4, wherein the tooth skipping prevention portion is provided at a corresponding portion of both legs of the lower piece, thereby enabling adaptation to left and right doorways being different in orientation.

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