Winding shaft mounting structure for electric shutter device

Abstract

To provide a winding shaft mounting structure of an electric shutter device capable of reducing manufacturing cost.SOLUTION: The winding shaft mounting structure of an electric shutter device with a take-up shaft 31 that has a shaft 31a at one end and a motor case 31b on the other end is mounted between the inner surfaces 34a of the two side plates 34 via brackets 36, respectively. On the end of the motor case 31b, a recessed fitting portion 40 that can be fitted to a bracket 36 for supporting the shaft 31a is formed.SELECTED DRAWING: Figure 6

Description

[Technical Field]

[0001] The present invention relates to a winding shaft mounting structure for an electric shutter device, in which a winding shaft having a shaft at one end and a motor case at the other end is mounted between the inner surfaces of two side plates via brackets. [Background technology]

[0002] An electric shutter device in which a shutter curtain is operated by driving an electric motor includes an electric motor built into one end of a winding shaft around which the shutter curtain is wound (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2012-52388 Summary of the Invention [Problem to be solved by the invention]

[0004] In the electric shutter device equipped with the winding shaft described above, dedicated brackets are attached to the inner surfaces of the side plates, and the winding shaft is attached between the inner surfaces of the side plates by fixing the shaft and motor case to the respective brackets. However, when attaching via dedicated brackets, the number of parts to be handled increases, which is not necessarily desirable in terms of manufacturing costs.

[0005] SUMMARY OF THE INVENTION In view of the above circumstances, an object of the present invention is to provide a winding shaft mounting structure for an electric shutter device that can reduce manufacturing costs. [Means for solving the problem]

[0006] In order to achieve the above object, the winding shaft mounting structure of the electric shutter device according to the present invention is a winding shaft mounting structure of an electric shutter device in which a winding shaft having a shaft at one end and a motor case at the other end is mounted between the inner surfaces of two side plates via brackets, and a fitting portion is provided at the end of the motor case so that it can be fitted into a bracket for supporting the shaft. The bracket supporting the shaft has a support wall and two side walls provided on both sides of the support wall, and is attached to the side plate with the support wall and the two side walls protruding from the inner surface, and the end of the shaft is detachably supported between the support wall and the two side walls. The fitting portion of the motor case has two opposing abutment surfaces that abut against the outer surfaces of the two side walls, and forms a recess into which the bracket is fitted between the two abutment surfaces. One end of the fitting portion opens to the circumferential surface of the motor case, while the other end is closed. It is characterized by the fact that [Effects of the Invention]

[0007] According to the present invention, a common bracket can be used for both the shaft and the motor case, which does not increase the number of parts and is advantageous in terms of manufacturing costs. Moreover, since the fitting portion of the motor case and the bracket are fitted together, the take-up shaft and the side plate can be attached more firmly, which is advantageous in terms of durability. [Brief explanation of the drawings]

[0008] [Figure 1] 1 is a vertical cross-sectional view of an electric shutter device to which a winding shaft mounting structure according to an embodiment of the present invention is applied. [Figure 2] FIG. 2 is an exploded perspective view of the electric shutter device shown in FIG. 1 as seen from the outside of the room. [Figure 3] This shows the components of the electric shutter device shown in Figure 1, where (a) is a perspective view of the shutter case, (b) is a perspective view of one of the side plates that make up the shutter case, and (c) is a perspective view of the other side plate that makes up the shutter case. [Figure 4] 2A and 2B show the components of the electric shutter device shown in FIG. 1, where FIG. 2A is a perspective view of the winding shaft with the winding roll disposed around it, and FIG. 2B is an enlarged perspective view of the main part of the motor case which is one end of the winding shaft. [Figure 5] 2 is a plan view of the main part showing the connection portion between the side plate and the shaft of the winding shaft in the electric shutter device shown in FIG. 1. FIG. [Figure 6]2 is an enlarged view showing an end face of a motor case in a winding shaft applied to the electric shutter device shown in FIG. 1. [Figure 7] This shows the connection between the side panel and the motor case of the winding shaft in the electric shutter device shown in Figure 1, where (a) is a perspective view of the main part as seen from outside the room with the slat guide omitted, and (b) is a perspective view of the main part as seen from the building side with the slat guide omitted. [Figure 8] 2 is a perspective view of the connecting portion between the side plate and the motor case of the winding shaft in the electric shutter device shown in FIG. 1, as seen from the outdoor side. FIG. [Figure 9] 2 is a view of the side plate to which the motor case of the winding shaft is connected in the electric shutter device shown in FIG. 1, as seen from the inner surface side. DETAILED DESCRIPTION OF THE INVENTION

[0009] A preferred embodiment of a winding shaft mounting structure for an electric shutter device according to the present invention will be described in detail below with reference to the accompanying drawings. For convenience, the terms "prospect direction" and "finding direction" will sometimes be used below. The "prospect direction" is the direction along the depth of the electric shutter device, as indicated by arrow A in the drawings. A surface along the prospect direction will sometimes be referred to as a "prospect surface." The "prospect direction" is the direction perpendicular to the prospect direction for an object that extends horizontally, such as a horizontal frame. For an object that extends vertically, such as a vertical frame, the "prospect direction" is the horizontal direction perpendicular to the prospect direction. A surface along the prospect direction will sometimes be referred to as a "prospect surface."

[0010] 1 and 2 show an electric shutter device to which a winding shaft mounting structure according to an embodiment of the present invention is applied. The electric shutter device illustrated here is attached to the upper part of a frame 10 of a fitting such as a sliding window. The frame 10 of the fitting to which the electric shutter device is attached has a shutter box 20 formed above the upper frame 11. The shutter box 20 is used to house and support the electric shutter device, and is formed in the shape of a horizontally elongated rectangular parallelepiped by extending the upper ends of the left and right vertical frames 12 above the upper frame 11 and installing a roof plate 21 between the upper ends of the extended vertical frames 12.

[0011] The electric shutter device disposed in the shutter box 20 described above winds and unwinds a shutter curtain 32 around a winding shaft 31 provided in a shutter case 30. As shown in FIGS. 1 to 3, the shutter case 30 is configured with side panels 34 provided on both sides of a back panel 33, facing each other. The upper and outdoor portions of the shutter case 30 between the left and right side panels 34 are removably covered by a front cover 35a. Brackets 36 for supporting the winding shaft 31 are attached to opposing portions of the side panels 34. The winding shaft 31 incorporates an electric motor 37 and its control unit 38 and rotatably supports a winding roll 39 on its outer periphery, allowing the winding roll 39 to rotate in both directions relative to the electric motor 37. The control unit 38 controls the direction and speed of rotation of the electric motor 37 based on commands given from a remote control (described later) or an indoor terminal device (not shown).

[0012] In this embodiment, as shown in FIG. 4, a winding shaft 31 is used, in which a cylindrical shaft 31a protrudes from one end of a winding roll 39 and a columnar resin motor case 31b protrudes from the other end. The shaft 31a and the motor case 31b are connected to brackets 36, respectively, so that the winding shaft 31 is attached between the left and right side plates 34. More specifically, the brackets 36 are originally intended to support the shaft 31a, and as shown in FIGS. 3(b) and 3(c), each bracket 36 includes a support wall 36a, two side walls 36b provided on both sides of the support wall 36a, and a mounting wall 36c provided so as to bend from each side wall 36b. The brackets 36 are attached to the approximate center of the inner surface 34a of the side plate 34 via the mounting wall 36c, with a support opening 36d between the side walls 36b opening obliquely upward toward the outside. The bracket 36 may be attached to the side plate 34 by welding such as spot welding, or by using screws. The distance between the two side wall portions 36b is formed to a dimension that allows the shaft 31a of the take-up spindle 31 to be accommodated. As shown in FIG. 5, the shaft 31a of the take-up spindle 31 is positioned between the support wall portion 36a and the two side wall portions 36b, and the shaft 31a can be detachably attached to the bracket 36 by passing a connecting member 36e through the screw insertion hole (screw insertion portion) 36b1 of the side wall portions 36b and the screw insertion hole 31a1 of the shaft 31a. The connecting member 36e may be, for example, a screw that is passed through and a nut is screwed onto it.

[0013] On the other hand, as shown in FIG. 4(b), the motor case 31b of the winding shaft 31 is provided with a fitting portion 40 that opens onto the end face and circumferential surface. The fitting portion 40 is concave and has two abutment surfaces 41 that face each other with a distance substantially equal to the width of the two side wall portions 36b of the bracket 36, a closed end surface 42 that connects one end of each abutment surface 41, and two open edge surfaces 43 that extend in directions away from each other from the other end edges of each abutment surface 41. As shown in FIG. 6, a relief portion 44 is provided at each of the meeting points, which form the inside corners between the abutment surfaces 41 and the closed end surface 42. The relief portions 44 are formed to have a concave shape and prevent direct contact between the abutment surfaces 41 and the closed end surface 42. 6 and 7, the motor case 31b having this fitting portion 40 can be fitted to the bracket 36 with the side wall portion 36b of the bracket 36 abutting against the two abutment surfaces 41, respectively, and with the end face of the side wall portion 36b abutting against the closed end face 42. Furthermore, by passing a connecting member 36f through the screw insertion hole (screw insertion portion) 31b1 of the motor case 31b and the screw insertion hole 36b1 of the side wall portion 36b, the motor case 31b can be detachably attached to the bracket 36. As with the above, the connecting member 36f can be, for example, a screw passed through and a nut screwed onto it.

[0014] 9, a plurality of cable insertion holes 51 are provided on the periphery of the motor case 31b to allow cables such as a power cable 61 and its connector 61a for supplying power to the electric motor 37 and control unit 38 built into the winding shaft 31, and a terminal communication cable 62 for connecting external devices such as indoor terminal equipment to the control unit 38 to pass through the inside and outside of the motor case 31b. The wire insertion hole 52 is the only one provided in the approximate center of the motor case 31b to allow an operation wire 63 to pass through the inside and outside of the motor case 31b. The operation wire 63 is pulled when the braked state of the winding roll 39 on the winding shaft 31 is released to manually operate the shutter curtain 32.

[0015] As shown in FIG. 1, the shutter curtain 32 is formed by interconnecting multiple slats 32a, with one end connected to a winding roll 39. When the winding roll 39 rotates around the winding shaft 31 by driving an electric motor 37, the shutter curtain 32 can be wound and unwound around the winding roll 39. As shown in FIGS. 1 and 2, guide rails 13 are provided on the left and right vertical frames 12 on the exterior side of the room. When the shutter curtain 32 is unwound from the winding roll 39, both edges are inserted into the guide rails 13, allowing it to close the opening of the frame body 10. As shown in FIG. 1, a winding space 32A is provided between the outer circumferential surface of the winding roll 39 and the back panel 33 and front cover 35a so that the shutter curtain 32 does not come into contact with the back panel 33 and front cover 35a even when the shutter curtain 32 is fully wound onto the winding roll 39. Furthermore, a larger gap is secured between the side plates 34 of the shutter case 30 than between the shutter curtains 32, and the shutter curtain 32 wound around the winding roll 39 does not come into contact with the inner surface 34a of the side plate 34. Note that reference numeral 35b in Figure 2 denotes a side cover that covers the outer surface of the part of the side plate 34 that protrudes outside the room beyond the vertical frame 12.

[0016] As shown in FIG. 8, one side plate 34 (the right side plate when viewed from the outdoor side in this embodiment) supporting the motor case 31b has three slat guides 70A, 70B, and 70C arranged side by side in the circumferential direction on the inner surface 34a facing the other side plate 34 so as to surround the winding shaft 31. These slat guides 70A, 70B, and 70C are disposed in the gap between the shutter curtain 32 and the side plate 34, thereby forming a storage space (not shown) between the side plate 34 and the shutter curtain 32. As shown in FIG. 9, these storage spaces accommodate the power cable 61, its connector 61a, and terminal communication cable 62, which are pulled out from the cable insertion hole 51 of the motor case 31b to the outside, as well as the intermediate portion of the above-mentioned operation wire 63. The outdoor slat guide 70B also accommodates electronic components 64, such as communication devices, for connecting the control unit 38 to external devices such as remote controls and indoor terminal equipment.

[0017] In the electric shutter device configured as described above, when the device is operated from inside the building using a remote control or indoor terminal device (not shown), the electric motor 37 rotates in a direction and at a rotational speed corresponding to the operation via the electronic components 64 and the control unit 38. This causes the shutter curtain 32 to be wound and unwound around the winding roll 39 of the winding shaft 31, thereby appropriately opening and closing the opening in the frame body 10. During these operations, the shutter curtain 32 moves within the shutter case 30. However, the power cable 61, the terminal communication cable 62, the operating wire 63, and the electronic components 64 are all disposed in the storage space between the slat guides 70A, 70B, and 70C and the side panel 34. Therefore, there is no risk of the shutter curtain 32 coming into contact with these cables 61 and 62, the operating wire 63, or the electronic components 64.

[0018] Furthermore, because a common bracket 36 can be used for both the shaft 31a of the winding shaft 31 and the motor case 31b, the number of parts is not increased, which is advantageous in terms of manufacturing costs. Moreover, because the fitting portion 40 of the motor case 31b is fitted into the bracket 36, the winding shaft 31 and the side plate 34 can be more firmly attached, which is also advantageous in terms of durability. Furthermore, the fitting portion 40 has relief portions 44 at the meeting points where the abutment surface 41 and the closed end surface 42 meet, forming an internal corner. Therefore, although the side wall portion 36b of the bracket 36 is pressed against the abutment surface 41 as the winding shaft 31 and the winding roll 39 rotate relative to each other, stress concentration at the meeting points between the abutment surface 41 and the closed end surface 42 is prevented. This prevents damage to the motor case 31b even when the electric shutter device is used for a long period of time.

[0019] In the above-described embodiment, a recessed fitting portion 40 is exemplified, but this is not necessarily limited to this, and for example, the motor case 31b may be provided with a fitting portion 40 that fits between the side wall portions 36b of the bracket 36. Furthermore, although the screw insertion holes 31b1, 36b1 are exemplified as screw insertion portions through which the connecting member 36f passes, grooves that allow screws to be inserted may also be used.

[0020] As described above, the winding shaft mounting structure for an electric shutter device of the present invention is a winding shaft mounting structure for an electric shutter device in which a winding shaft having a shaft at one end and a motor case at the other end is mounted between the inner surfaces of two side plates via brackets, and is characterized in that the end of the motor case is provided with a fitting portion that can be fitted into a bracket for supporting the shaft. According to this invention, a common bracket can be used for both the shaft and the motor case, which does not increase the number of parts and is advantageous in terms of manufacturing costs. Moreover, since the fitting portion of the motor case and the bracket are fitted together, the take-up shaft and the side plate can be attached more firmly, which is advantageous in terms of durability.

[0021] The present invention is also characterized in that, in the winding shaft mounting structure of the electric shutter device described above, the bracket supporting the shaft has a support wall and two side wall portions provided on both sides of the support wall, and is attached to the side plate with the support wall and the two side wall portions protruding from the inner surface, and the end of the shaft is detachably supported between the support wall and the two side wall portions, and the fitting portion of the motor case has two opposing abutment surfaces that abut against the outer surfaces of the two side wall portions, and forms a recess into which the bracket is fitted between the two abutment surfaces, one end of the fitting portion opens to the circumferential surface of the motor case while the other end is closed, and the meeting portion between the closed end surface of the fitting portion and the abutment surface each has a recess so as to form a recess. According to this invention, the motor case and the bracket are joined via the two side walls of the bracket, which ensures a large joining area between them, which is advantageous in terms of strength. Moreover, the motor case has relief portions at both corners of the closed end face, which prevents damage to the motor case due to stress concentration.

[0022] The present invention is also characterized in that, in the winding shaft mounting structure of the above-mentioned electric shutter device, the motor case and the bracket are each provided with a screw insertion portion, and the motor case is attached to the bracket by passing a connecting member through the screw insertion portion of the motor case and the screw insertion portion of the bracket. According to this invention, the motor case can be attached to the bracket by passing a connecting member such as a screw through the screw insertion portion, which is advantageous in terms of workability. [Explanation of symbols]

[0023] 31 winding shaft, 31a shaft, 31b motor case, 31b1 screw insertion hole, 34 side plate, 34a inner surface, 36 bracket, 36a support wall portion, 36b side wall portion, 36b1 screw insertion hole, 36c mounting wall portion, 36d support opening, 36e, 36f connecting pin, 40 fitting portion, 41 abutment surface, 42 closed end surface, 43 opening end edge surface, 44 relief portion

Claims

1. A winding shaft mounting structure for an electric shutter device, in which a winding shaft having a shaft at one end and a motor case at the other end is mounted between the inner surfaces of two side plates via brackets, an end of the motor case is provided with a fitting portion that can be fitted onto a bracket that supports the shaft; the bracket supporting the shaft has a support wall portion and two side wall portions provided on both sides of the support wall portion, and is attached to the side plate with the support wall portion and the two side wall portions protruding from an inner surface, and detachably supports the end of the shaft between the support wall portion and the two side wall portions; the fitting portion of the motor case has two opposing abutment surfaces that abut on outer surfaces of the two side wall portions, and forms a recess between the two abutment surfaces into which the bracket is fitted, The winding shaft mounting structure for an electric shutter device is characterized in that one end of the fitting portion is open to the peripheral surface of the motor case, while the other end is closed.

2. A winding shaft mounting structure for an electric shutter device as described in Claim 1, characterized in that the meeting portion between the closed end face of the fitting portion and the abutment surface is provided with a recess so that it is concave.

3. The motor case and the bracket each have a screw insertion portion, 2. The winding shaft mounting structure of an electric shutter device according to claim 1, wherein the motor case is attached to the bracket by passing a connecting member through the screw insertion portion of the motor case and the screw insertion portion of the bracket.

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