JP5969302B2 - Blind drum unit - Google Patents

Description

  The present invention relates to a blind drum device that tilts a ladder tape by the rotation of a rotating drum.

  As such a drum device for a blind, what was applied in the blind built-in multilayer glass shown by patent document 1 is known. What is shown is that a winding drum as a rotating drum is provided on a horizontal rotating shaft rotatably arranged in the head box, and the upper end of the ladder cord is wound around the winding drum. It is fastened so that it cannot slide relative to it by caulking. The winding drum portion of the horizontal rotating shaft is rotatably supported by a bearing as a drum case fixed to the head box at the position of the ladder cord.

Japanese Examined Patent Publication No. 4-26034

  However, the drum device disclosed in Patent Document 1 has the following problems with respect to the assembly of the bearing, the winding drum portion, and the ladder cord.

  That is, when the ladder cord is wound around the winding drum while the winding drum is supported by the bearing, the ladder cord is passed from the lower part of the bearing, and the upper end of the ladder cord is looped through the winding drum. Since it is a work procedure, there is a problem that assembly is difficult and workability is poor. In particular, when the front and rear dimensions of the head box and the bearing are small, the work space is narrow and assembly is difficult.

  When the winding drum is inserted from the bottom of the bearing and supported by the bearing while the ladder cord is wound around the winding drum, the winding drum is temporarily placed above the bearing in order to be supported by the bearing. Must be raised to. For this reason, the ladder cord needs to be longer than the required length at the position where the winding drum portion is supported by the bearing, and the length that the winding drum portion is pulled up upwards. There is a problem that the gap between the head box and the uppermost slat becomes large.

  The present invention has been made in view of the above problems, and provides a blind drum device that can improve workability during assembly, and can improve workability even when the longitudinal dimension of the product is small. Is the purpose.

In order to achieve the above-described object, according to one aspect of the present invention , a rotating drum that rotates in association with rotation of a rotating shaft that is rotatably disposed in an upper support member, and an upper support member are fixed. A drum case that rotatably supports a rotating drum, and a blind drum device that rotates a slat by tilting a ladder tape that supports a number of slats in the vertical direction by rotating the rotating drum.
The drum case is configured by reversing and combining a pair of case parts having the same shape around a central dividing surface extending in the vertical direction, and each case part has a bearing part that supports the shaft part of the rotating drum. And a support portion that protrudes from the center dividing surface toward the bearing portion of the counterpart case component is formed on the bearing portion.

Furthermore, one aspect of the present invention is characterized in that a concave portion for receiving a support portion of a counterpart case component is formed in a bearing portion of each case component.

Furthermore, one aspect of the present invention is characterized in that each case component is formed with a holding portion that protrudes from the center dividing surface and supports a support portion of the other case component from below.

Furthermore, one aspect of the present invention, the support portion and the holding portion, characterized in that the cross section of the mutual contact surfaces have an arc shape of the same curvature.

  According to the present invention, the drum case is configured by reversing and combining a pair of case parts having the same shape around the central dividing surface extending in the vertical direction. Therefore, when the rotary drum is assembled to the drum case, A rotating drum can be rotatably supported by a drum case by assembling a rotating drum together with ladder tape from the front of one of the case parts and then combining the other case part from the front of one of the case parts. This improves workability during assembly. Further, since the rotating drum can be assembled from the front of the bearing portion, the ladder tape can be set only to a required length, and the gap between the upper support member and the uppermost slat can be made small.

  Since the drum case is configured by reversing and combining a pair of case parts having the same shape, a common part can be used and the number of parts can be reduced.

  Since the support portion protrudes from the central dividing surface, the rotating drum can be rotated stably and smoothly without the load of the rotating drum being concentrated on the central dividing surface that is a boundary between the case components.

It is a partially broken front view of the blind to which the drum device of the present invention is applied. It is an expansion perspective view which shows the drum apparatus vicinity of FIG. It is a disassembled perspective view of the drum apparatus of the state in which the ladder tape which supports a slat was wound around the rotating drum. FIG. 4 is a perspective view showing a state where the drum device of FIG. 3 is assembled. It is a side view of a drum apparatus, (a) shows the state disassembled, (b) shows the assembled state. It is a front view showing another blind to which the drum device of the present invention is applied.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  In this embodiment, the blind 20 is built in the double-glazed glass 10, and as shown in FIG. 1, the double-glazed glass 10 connects the upper, lower, left and right spacers 14 in a rectangular frame shape. The front and rear surfaces are sandwiched between two glass plates 12, and an internal space 16 is defined between the glass plates 12. A blind 20 is disposed in the internal space 16.

  The blind 20 includes a frame 22 composed of an upper frame (upper support member) 22a, a lower frame 22b, and a pair of vertical frames 22c, a rotation shaft 24 that is horizontally disposed in the upper frame 22a and is rotatably disposed. A plurality of drum devices 80 are provided on the shaft 24 to transmit the rotation of the rotating shaft 24, and a large number of slats 26 are supported in an aligned state in the vertical direction, and the rotation of the rotating shaft 24 is transmitted through the drum device 80. A plurality of ladder tapes 28 that tilt, a drive mechanism 60 that is provided on the upper side of one vertical frame 22c and transmits the rotation to the rotary shaft 24, and an operating device 30 that can drive the drive mechanism 60 from the outside. Is composed of. Reference numeral 29 denotes a bottom rail disposed below the slat row 26 and connected to the lower end of the ladder tape 28.

  As shown in FIG. 2, the upper frame 22a serving as the upper support member is composed of two parts divided before and after the rear part 22a1 and the front part 22a2.

  The operating device 30 is provided inside and outside one vertical frame 22c, and is provided with an operating unit 32 movably disposed on the surface of the glass plate 12 on the one vertical frame 22c, and one vertical frame 22c. The driven unit 34 that is driven by the operating unit 32, the transmission shaft 36 that is connected to the driving mechanism 60, converts the movement of the driven unit 34 into rotation and transmits it to the driving mechanism 60, and the operating unit 32 on the glass surface 12. And a guide portion 38 that is slidably supported.

  By operating the operation part 32 on the glass plate 12 and moving it in the vertical direction along the guide part 38, the driven part 34 adsorbed by the magnetic force to the operation part 32 moves in the vertical direction, and the transmission shaft 36. Is driven to rotate. The rotation of the transmission shaft 36 is transmitted to the rotation shaft 24 via the drive mechanism 60.

  As shown in FIGS. 2 to 5, the drum device 80 includes a rotating drum 82 through which the rotating shaft 24 is rotatably inserted, and a drum case fixed to the upper frame 22 a and rotatably supporting the rotating drum 82. 84.

  The rotary drum 82 includes a drum portion 82a and a pair of shaft portions 82b that project laterally from both ends of the drum portion 82a. The shaft portions of the drum portion 82a and both shaft portions 82b have non-circular cross sections that pass through them. A through-hole 82c having is formed. The rotary shaft 24 having a non-circular cross section that matches the through hole 82c is inserted into the through hole 82c so as not to be relatively rotatable. As shown in FIG. 3, a ladder tape 28 is wound around the drum portion 82a, and one vertical tape 28a of the vertical tapes before and after the ladder tape 28 is wound around the drum portion, and then a predetermined amount is dropped. In this position, the other vertical tape 28b is connected with the fastener clip 90, and the vertical tapes 28a and 28b before and after the ladder tape 28 form a loop.

  The drum case 84 is made of, for example, a plastic molded product, and is configured by combining a pair of case parts 86 and 88 having the same shape. The pair of case parts 86 and 88 are reversed and combined with the central dividing surface extending in the vertical direction of the drum case 84 as a center, and the opposing contact surfaces 86j and 88j of the both side portions 86a and 88a located on the central dividing surface are Are opposed to each other and a space for accommodating the drum portion 82a of the rotary drum 82 is defined therein.

  In a state where the pair of case parts 86 and 88 are combined with each other, the pair of bearing parts 86b and 88b formed on the side parts 86a and 88a of the case parts 86 and 88 form a cylindrical part, and the rotating drum 82 is formed. The pair of shaft portions 82b are rotatably supported. The cylindrical portion extends in the horizontal direction to a position slightly projecting laterally from the outer surface of the side portion 86a, 88a of the main body of each case component 86, 88.

  Of the pair of bearing portions 86b, 88b of each case component 86, 88, the lower portion of one of the bearing portions 86b, 88b protrudes in the direction of the counterpart case component 88, 86 from the center dividing surface, and the counterpart case component 88, Support portions 86c and 88c that fit into the bearing portions 88b and 86b of 86 are formed. The support portions 86c and 88c are formed only on the bearing portions 86b and 88b that protrude laterally from the outer surfaces of the side portions 86a and 88a.

  Corresponding to the support portions 86c and 88c, the support portions 88c and 86c of the other case component are disposed below the other bearing portions 86b and 88b of the pair of bearing portions 86b and 88b of the case components 86 and 88, respectively. Recesses 86d, 88d (in addition, the recesses 88d of the case part 88 are not shown in the figure) are formed. The concave portions 86d and 88d are also formed only in the portions of the bearing portions 86b and 88b that protrude laterally from the side portions 86a and 88a.

  Further, below the recesses 86d and 88d of the case parts 86 and 88, lower holding portions 86e and 88e projecting in the direction of the opposite case parts 86 and 88 from the central dividing surface are extended. The portions 86e and 88e are configured to support the support portions 88c and 86c of the other case components 88 and 86 from below, and in a state where the cases are separated from each other in a state where the pair of case components 86 and 88 are combined. It is restricted from moving.

  Therefore, the lower surfaces of the support portions 86c and 88c and the upper surfaces of the lower holding portions 88e and 86e, which are contact surfaces with each other, have an arc shape whose cross section is the same curvature.

  The upper portions of the pair of bearing portions 86b and 88b of the case components 86 and 88 are flush with the central dividing surface, but preferably the bearing portions 86b and 88b on which the support portions 86c and 88c are not formed. The upper holding portions 86k and 88k project from the center dividing surface in the direction of the counterpart case components 88 and 86 and support the counterpart bearing portions 88b and 86b from above. , 88 are restricted from moving in the direction in which the cases are separated from each other.

  For this reason, the upper surfaces of the bearing portions 86b and 88b on which the support portions 86c and 88c serving as contact surfaces are formed and the lower surfaces of the upper holding portions 88k and 86k are arc-shaped with the same curvature in the cross section. Yes.

  On the upper part of the opposing contact surfaces 86j, 88j of the pair of case parts 86, 88, there are fitting projections 86f, 88f protruding from the central dividing surface and fitting concave portions 86g, 88g recessed from the central dividing surface. The fitting projection 86f of the case component 86 is fitted into the fitting recess 88g of the case component 88 and the fitting recess 86g of the case component 86 in a state where the pair of case components 86 and 88 are combined. Are fitted into the fitting protrusions 88f of the case component 88, respectively.

  Further, fitting protrusions 86h and 88h projecting from the central dividing surface and recessed from the central dividing surface are formed below the opposing abutting surfaces 86j and 88j of both side portions 86a and 88a of the pair of case parts 86 and 88. Fitting recesses 86i and 88i (note that the fitting recess 88i of the case component 88 is not shown in the drawing) are provided, and the case component 86 in a state where the pair of case components 86 and 88 are combined. The fitting projection 86h is fitted into the fitting recess 88i of the case component 88, and the fitting recess 86i of the case component 86 is fitted into the fitting projection 88h of the case component 88.

  In this manner, in a state where the pair of case parts 86 and 88 are combined, the fitting protrusions 86f and 88f and the fitting recesses 88g and 86g are respectively fitted, and the fitting protrusions 86h and 88h and the fitting recess 88i, Since 86i fits in each other, the pair of case parts 86 and 88 are restricted from coming off from each other.

  Locking portions 86m and 88m are formed at the lower ends of the pair of case parts 86 and 88. By sliding the pair of case parts 86 and 88 in the front-rear direction of the upper frame 22a, the locking portion 86m. , 88m can be locked to an opening 22d (see FIG. 2) formed in the lower surface of the upper frame 22a.

  Next, the assembly procedure of the drum device 80 will be described.

  First, as shown in FIG. 3, the upper portion of the vertical tape 28a on the front side of the ladder tape 28 that supports the slat 26 is wound around the drum portion 82a of the rotary drum 82, and the ladder tape 28 is placed at a position where it is suspended by a predetermined amount. The upper portion of the side vertical tape 28 b is connected by a fastener clip 90. Here, the predetermined amount means that when the rotating drum 28 rotates and the vertical tape before and after the ladder tape 28 is wound or unwound so that the slat 26 rotates to the fully closed position, the fastener clip 90 is rotated by the rotating drum 28. This is the length necessary to avoid interference.

  Then, both shaft portions 82b of the rotating drum 82 around which the ladder tape 28 is wound are supported from the front by a bearing portion 86b of one case component 86 as shown in FIG. At this time, since the one shaft portion 82b is supported by the support portion 86c protruding from the opposing abutment surface 86j which is the central dividing surface of the case component 86, the rotating drum 82 can be easily dropped into the one case component 86. It can be supported in a temporarily fixed state without any.

  Next, as shown in FIGS. 4 and 5B, the other case component 88 is combined with one case component 86 from the front. As a result, the support portions 86c, 88c are inserted into the recesses 88d, 86d of the counterpart case components 88, 86 and supported from below by the lower holding portions 88e, 86e. The bearing portions 86b and 88b are supported from above by the upper holding portions 88k and 86k. Further, the fitting protrusions 86f and 88f and the fitting recesses 88g and 86g are respectively fitted, and the fitting protrusions 86h and 88h and the fitting recesses 88i and 86i are respectively fitted, thereby a pair of case parts. 86 and 88 are regulated and assembled so as to be separated from each other.

  Further, in a state where the upper frame 22a is disassembled into the rear part 22a1 and the front part 22a2, the locking part 86m of one case part 86 and the locking part 88m of the other case part 88 are connected to the rear part of the upper frame 22a. The case parts 86 and 88 are fixed to the rear part 22a1 of the upper frame 22a by slidingly inserted into the opening 22d formed in 22a1 and locked from the front.

  Thereafter, the rotary shaft 24 is inserted into the through hole 82 c of the rotary drum 82. Accordingly, the rotary drum 82 is configured to rotate integrally with the rotation of the rotary shaft 24. Then, the front part 22a2 of the upper frame 22a is slid and attached to the rear part 22a1, and the opening end of the opening 22d is closed.

  Thus, the drum device 80 is assembled to the upper frame 22a. Since this assembling work can be performed from the front of the upper frame 22a, the workability is good and the work can be easily performed even when the front and rear dimensions of the upper frame 22a are small. Further, since the rotating drum 82 around which the ladder tape 28 is wound can be assembled to the drum case 84 from the front, the ladder tape 28 can be set only to a required length, and the upper frame 22a and the uppermost slat can be set. The gap can be made small.

  Further, since the drum case 84 is configured by combining a pair of case parts 86 and 88 having the same shape, the number of parts can be reduced.

  Further, the support portions 86c and 88c of the pair of case parts 86 and 88 protrude from the center dividing surface, so that the rotary drum 82 can be temporarily fixed at the time of assembly. The rotating drum 82 can be stably and smoothly rotated without concentrating the load of the rotating drum 82 on the central dividing surface that is the boundary between the two.

  Further, since the lower holding portions 86e and 88e support the support portions 88c and 86c from below, the lower sides of the bearing portions 86b and 88b are doubly supported on the central dividing surface. Can be secured.

  The support parts 86c, 88c and the lower holding parts 88e, 86e overlap each other in an arc shape, so that the case parts 86, 88 can be attracted to each other. Can be prevented from separating. Similarly, the bearing parts 86b and 88b and the upper holding parts 88k and 86k overlap each other in an arc shape, so that the case parts 86 and 88 can be brought together, and the case part 86 is rotated when the rotary drum 82 is rotated. , 88 can be prevented from being separated from each other.

  When the slat 26 is rotated using the drum device 80 configured as described above, the rotation is transmitted to the rotation shaft 24 as described above by moving the operation portion 32 along the guide portion 38, and the rotation shaft 24. And the drum portion 82a rotate together. When the drum portion 82a rotates, one of the vertical tapes 28a and 28b of the ladder tape 28 is wound, and when the other is unwound, the ladder tape 28 tilts and the slat 26 can rotate.

  In the embodiment described above, the present invention is applied to a blind built-in double-glazed glass that is required to reduce the longitudinal dimension of the upper frame 22a. In such a case, the present invention is particularly suitable. It is not limited. For example, as shown in FIG. 6, the drum device 80 can be applied to a normal horizontal blind instead of the blind 20 in which the multilayer glass 10 is built. The drum device 80 is attached to a head box (upper support member) 100. The rotary shaft 24 for rotating the rotary drum 82 of the drum device 80 is rotationally driven by a rotary operation rod 102 that hangs from one end of the head box 100, and the slat 26 is a lifting / lowering cord 104 that hangs from one end of the head box 100. Is moved up and down.

  According to the present invention, even in such a normal horizontal blind, workability at the time of assembling can be similarly improved.

22a Upper frame (upper support member)
24 Rotating shaft 26 Slat 28 Ladder tape 82 Rotating drum 82b Shaft portion 84 Drum case 86, 88 Case parts 86b, 88b Bearing portion 86c, 88c Support portion 86d, 88d Recess 86e, 88e Holding portion 100 Head box (upper support member)

Claims (4)

A rotary drum (82) that rotates in conjunction with the rotation of a rotary shaft (24) that is rotatably arranged in the upper support members (22a, 100), and a rotary drum that is fixed to the upper support member and rotatable. A drum case (84) for supporting the slats, and rotating the slats by tilting a ladder tape (28) that supports a large number of slats (26) in the vertical direction by rotation of the rotating drum.
The drum case (84) is configured by a pair of case parts (86, 88) having the same shape being reversed and combined with a center dividing surface extending in the vertical direction being a surface parallel to the axial direction of the rotating shaft. Each case part (86, 88) is formed with a bearing part (86b, 88b) for supporting the shaft part (82b) of the rotating drum (82). The blind drum device is characterized in that a support portion (86c, 88c) protruding from the center dividing surface toward the bearing portion is formed.   2. The blind part according to claim 1, wherein the bearing part (86b, 88b) of each case part (86, 88) is formed with a recess (86d, 88d) for receiving a support part of the other case part. Drum equipment.   Each of the case parts (86, 88) is formed with a holding part (86e, 88e) that protrudes from the center dividing surface and supports the support part of the other case part from below. The drum device for blinds according to 2.   The blind drum device according to claim 3, wherein the support portions (86c, 88c) and the holding portions (86e, 88e) have an arc shape with the same curvature in the cross section of the mutual contact surface.

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