Sliding door device

Abstract

To provide a sliding door device capable of improving the traction device strength against rotational loads.SOLUTION: A frame 10 includes: a horizontal frame member 11 extending in a right-left direction above the door body; and a vertical frame member 12 crossing the horizontal frame member 11 in the pulling direction. A traction device 60 includes: a body case 61; a winding body 62 which is rotatably housed in the body case 61 and biased in the winding rotation direction; and a string-like member 64 with one end fixed to the winding body 62 and the other end extended out from the body case 61 and fixed to the door body. The body case 61 is provided so as to be in contact with both the vertical frame member 12 and the horizontal frame member 11.SELECTED DRAWING: Figure 6

Description

[Technical Field]

[0001] The present invention relates to a sliding door device that opens or closes by pulling a door body. [Background technology]

[0002] Conventional inventions of this type, as described in Patent Document 1 for example, include a multiple sliding door device that includes a first door body that opens and closes at the door tail side, a second door body that is linked to the opening and closing movement of the first door body and opens and closes between a position where it overlaps with the first door body and a position closer to the closing direction than the first door body, brackets and rollers provided on the upper ends of the first and second door bodies, guide rails that suspend the rollers and roll them in the opening and closing direction, and automatic movement means supported by the guide rails, and the automatic movement means pulls the bracket fixed to the door tip side of the first door body in the closing direction, causing the first and second door bodies to close. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2013-60807 Summary of the Invention [Problem to be solved by the invention]

[0004] However, according to the above-described conventional technology, when the first and second door bodies are closed, a relatively large load in the rotational direction is applied to the automatic moving means (traction device), which may cause the automatic moving means to rattle. [Means for solving the problem]

[0005] In view of the above problems, the present invention has the following configuration. The door is provided with a frame body arranged around the opening, a door body that moves left and right inside the frame body to open and close the opening, and a traction device that traction the door body in the opening direction or the closing direction, the frame body having a horizontal frame member that extends left and right above the door body and a vertical frame member that intersects with the horizontal frame member on the traction direction side, the traction device having a main body case, a winding body that is rotatably stored in the main body case and is biased in the winding rotation direction, and a string-like member that has one end fixed to the winding body and the other end unwound from the main body case and fixed to the door body, the main body case being arranged to contact both the vertical frame member and the horizontal frame member. The door body has a top portion facing the upper end of the door body and a base portion extending downward from one end of the top portion in the projection direction. A side frame cover having a hanging plate portion hanging downward from the top portion of the side frame member is detachably attached to the side frame member. The main body case has an attachment piece integrally therewith that protrudes in the opposite direction to the pulling direction, and the attachment piece is attached to the base portion by the attachment piece. The attachment piece is exposed to the front side when the side frame cover is removed. A sliding door device characterized by: The present invention also has the following configuration. a traction device that traction the door body in the opening or closing direction, the traction device comprising: a frame body that is provided around an opening; a door body that moves left and right inside the frame body to open and close the opening; and a traction device that traction the door body in the opening or closing direction, the frame body comprising a horizontal frame member that extends left and right above the door body, and a vertical frame member that intersects with the horizontal frame member in the traction direction, the traction device comprising: a main case; a winding body that is rotatably stored within the main case and is biased in the winding rotation direction; and a string-like member that has one end fixed to the winding body and the other end unwound from the main case and fixed to the door body, the main case being provided so as to contact both the vertical frame member and the horizontal frame member, the horizontal frame member having a top portion that faces the upper end of the door body and a base portion that extends downward from one end of the top portion in the projection direction, the main case being provided so as to contact both the vertical frame member and the base portion of the horizontal frame member. The present invention also has the following configuration. The device comprises a frame body provided around the opening, a door body that moves left and right inside the frame body to open and close the opening, and a traction device that traction the door body in the opening direction or the closing direction, the frame body having a horizontal frame member that extends left and right above the door body and a vertical frame member that intersects with the horizontal frame member on the traction direction side, the traction device having a main body case, a winding body that is rotatably stored within the main body case and is biased in the winding rotation direction, and a string-like member that has one end fixed to the winding body and the other end unreeled out from the main body case and fixed to the door body, the main body case being provided so as to be in contact with both the vertical frame member and the horizontal frame member, and the main body case having a through-hole for adjusting traction force, A sliding door device characterized in that a traction force adjustment section is provided inside the main body case so as to be exposed to the outside through the traction force adjustment hole, and a removable cover member is provided outside the main body case so as to cover the lower side of the traction force adjustment hole. The present invention also has the following configuration. The door is provided with a frame body provided around the opening, a door body that moves left and right inside the frame body to open and close the opening, and a traction device that traction the door body in the opening direction or the closing direction, the frame body having a horizontal frame member that extends left and right above the door body and a vertical frame member that intersects with the horizontal frame member on the traction direction side, the traction device having a main body case, a winding body that is rotatably stored in the main body case and is biased in the winding rotation direction, and a string-like member that has one end fixed to the winding body and the other end unwound from the main body case and fixed to the door body, the main body case being a hoist provided on the upper end of the door body so as to be in contact with both the vertical frame member and the horizontal frame member, and a rail for suspending the hoist and rolling the hoist in the direction of opening and closing the door body, the hoist is rotatably supported by a bearing bracket fixed to the upper end of the door body, the other end of the string-like member is fixed to the bearing bracket, and a locking member for locking the other end of the string-like member is provided on the bearing bracket, and the locking member is configured to be selectively fastened to a door body closing side portion and a door body opening side portion of the bearing bracket. The present invention also has the following configuration. The door opening device comprises a frame body provided around the opening, a door body that moves left and right inside the frame body to open and close the opening, and a traction device that traction the door body in the opening direction or the closing direction, the frame body comprises a horizontal frame member that extends left and right above the door body, and a vertical frame member that intersects with the horizontal frame member on the traction direction side, the traction device comprises a main body case, a winding body that is rotatably stored within the main body case and is biased in the winding rotation direction, and a string-like member that has one end fixed to the winding body and the other end unwound from the main body case and fixed to the door body, a main body case that is provided so as to contact both the vertical frame members and the horizontal frame members, and that is equipped with a hoist provided on the upper end side of the door body, and a rail that suspends the hoist and rolls it in the direction of opening and closing the door body, the hoist is rotatably supported by a bearing bracket fixed to the upper end side of the door body, the other end side of the string-like member is fixed to the bearing bracket, and the bearing bracket is provided with a locking member to which the other end side of the string-like member is locked, and the locking member is provided on both the door body closing side portion and the door body opening side portion of the bearing bracket. [Effects of the Invention]

[0006] The present invention is configured as described above, and therefore improves the strength of the traction device against loads in the rotational direction. [Brief explanation of the drawings]

[0007] [Figure 1] 1 is a front view showing an example of a sliding door device according to the present invention. [Figure 2] 2 is a cross-sectional view taken along line (II)-(II) in FIG. 1, with hatching indicating the cross section omitted. [Figure 3] FIG. 2 is a front view showing an example of a suspension structure for a first door body, with the second door body omitted. [Figure 4] FIG. 10 is a front view showing an example of a suspension structure for a second door body, with the first door body omitted. [Figure 5] FIG. 10 is a plan view showing an example of an interlocking mechanism. [Figure 6] 1A and 1B show an example of a mounting structure for a traction device, where (a) is a front view and (b) is a view looking up from below (a). [Figure 7] FIG. 2 is a left side view of the main part of the sliding door device with the horizontal frame cover and cover member removed, with the vertical frame member omitted. [Figure 8] 10A and 10B are front views showing an example of a connection structure between a second door body and a traction device, where (a) shows a right-hand type and (b) shows a left-hand type. [Figure 9] 9A and 9B show a locking member used in the connection structure of FIG. 8, in which FIG. 9A is a front view and FIG. 9B is a left side view. [Figure 10] 10A and 10B are front views showing other examples of the connection structure between the second door body and the traction device, where (a) shows a right-hand type and (b) shows a left-hand type. [Figure 11] 10A and 10B show a locking member used in the connection structure of FIG. 9, in which FIG. 10A is a front view and FIG. [Figure 12] 10A and 10B are front views showing other examples of the connection structure between the second door body and the traction device, where (a) shows a right-hand type and (b) shows a left-hand type. DETAILED DESCRIPTION OF THE INVENTION

[0008] This embodiment discloses the following features. The first feature is that it comprises a frame body provided around the opening, a door body that moves left and right inside the frame body to open and close the opening, and a traction device that traction the door body in the opening or closing direction, the frame body comprising a horizontal frame member that spans left and right above the door body, and a vertical frame member that intersects with the horizontal frame member on the traction direction side, the traction device comprising a main body case, a winding body that is rotatably stored within the main body case and is biased in the winding rotation direction, and a string-like member that has one end fixed to the winding body and the other end unreeled out from the main body case and fixed to the door body, the main body case being provided so as to come into contact with both the vertical frame member and the horizontal frame member (see Figs. 1 to 12).

[0009] As a second feature, the main body case has a portion on the opposite side to the pulling direction side fastened to the vertical frame member by a fastener (see FIG. 6).

[0010] As a third feature, the horizontal frame member has a top portion facing the upper end of the door body and a base portion extending downward from one end of the top portion in the forward direction, and the main body case is arranged to contact both the vertical frame member and the base portion of the horizontal frame member (see Figure 6).

[0011] As a fourth feature, the main body case is in surface contact with the vertical frame members and also in surface contact with the horizontal frame members (see FIG. 6).

[0012] As a fifth feature, the door body has at least a first door body that opens and closes at the door end side, and a second door body that opens and closes in conjunction with the opening and closing movement of the first door body and moves between a position overlapping the first door body and a position closer to the closing direction than the first door body, and the string-like member is pulled out substantially parallel to the width direction of the second door body and fastened to the second door body (see Figs. 1, 4, 8, 10 and 12).

[0013] As a sixth feature, the traction device traction the door body in the closing direction (see FIGS. 4, 6, 8, 10 and 12).

[0014] As a seventh feature, the main body case is provided with a traction force adjustment hole having a through-hole, A traction force adjustment section is provided inside the main body case so as to be exposed to the outside through the traction force adjustment hole, and a removable cover member is provided outside the main body case so as to cover the lower side of the traction force adjustment hole (see Figure 7).

[0015] As an eighth feature, the cover member is formed so as to fit into the main body case from the side in a concave shape (see FIG. 7).

[0016] The ninth feature is that it comprises a hoist provided on the upper end side of the door body and a rail that suspends the hoist and rolls it in the direction of opening and closing the door body, the hoist is rotatably supported by a bearing bracket fixed to the upper end side of the door body, and the other end of the string-like member is fixed to the bearing bracket (see Figures 4, 8, 10 and 12).

[0017] As a tenth feature, the bearing bracket is provided with a locking member to which the other end of the string-like member is locked, and the locking member is configured to be selectively fastened to the door body closing side portion and the door body opening side portion of the bearing bracket (see Figures 4, 8, and 10).

[0018] As an eleventh feature, the bearing bracket is provided with a locking member to which the other end of the string-like member is locked, and the locking member is provided on both the door body closing side portion and the door body opening side portion of the bearing bracket (see Figure 12).

[0019] In the embodiments described below, inventions in which only the following constituent elements are essential are also disclosed. That is, one aspect of this invention is a sliding door device in which a door body is pulled in an opening direction or a closing direction by a pulling device, the pulling device comprising: a main body case; a winding body that is rotatably stored within the main body case and is biased in the winding rotation direction; and a string-like member that has one end fixed to the winding body and the other end unwound from the main body case and fixed to the door body; a traction force adjustment hole that passes through the main body case; a traction force adjustment part that is provided inside the main body case and exposed to the outside through the traction force adjustment hole; and a detachable cover member that is provided outside the main body case so as to cover the lower side of the traction force adjustment hole (see Fig. 7). According to this invention, the cover member can prevent liquid such as lubricating oil flowing out of the traction force adjustment hole from dripping downward.

[0020] Another invention includes a door body that moves left and right to open and close an opening, a hoist attached to the upper end of the door body, a rail that suspends the hoist and rolls it left and right, and a traction device that pulls the door body in the opening or closing direction, the traction device including a winding body that is biased in the winding rotation direction, and a string-like member that has one end fixed to the winding body and the other end fixed to the door body, the hoist being rotatably supported by a bearing bracket fixed to the upper end of the door body, and the other end of the string-like member being fixed to the bearing bracket. According to this invention, a string-like member is attached to a relatively sturdy bearing bracket and pulls the door body together with the bearing bracket, so there is no need to provide a structure for fastening the string-like member to the door body, etc. (See Figures 4, 8, 10 and 12). <Specific embodiment> Next, specific embodiments having the above-mentioned features will be described in detail with reference to the drawings. In this specification, the term "visible direction" refers to the direction of the thickness of the frame (the left-right direction in FIG. 2), which in this embodiment is the same direction as the "door thickness direction." In addition, the "visibility direction" means the width direction of the frame body (left and right direction in Figure 1) that is perpendicular to the visibility direction, and in this embodiment, it is the same direction as the width direction of the opening that is opened and closed by the door body and the width direction of the door body.

[0021] The sliding door device 1 comprises a frame body 10 provided around the opening A (see Figure 3) and the door pocket B, a first door body 21 and a second door body 22 that move left and right inside the frame body 10 to open and close the opening A, a plurality of hoists 31 provided on the upper ends of these door bodies, first and second rails 41, 42 that suspend these hoists 31 and roll them left and right, a linkage mechanism 50 that links the first door body 21 and the second door body 22 to open and close them, and a traction device 60 that pulls the second door body 22 in the closing direction, forming a multiple sliding door device.

[0022] The opening A is a rectangular through-hole formed in a wall W (see FIG. 2) of a frame (for example, a building or the like) on which the sliding door device 1 is to be installed. The door pocket section B is a space provided along one side of the wall section W so as to be aligned laterally with the opening section A.

[0023] The frame body 10 is formed in the shape of an inverted concave frame when viewed from the front (see FIG. 1), and is equipped with a horizontal frame member 11 that runs left and right along the upper ends of the opening A and the door pocket B above the first door body 21 and the second door body 22, one vertical frame member 12 that is fixed to an immovable part (for example, wall part W) so as to be approximately perpendicular to the horizontal frame member 11 on the side in the pulling direction by the pulling device 60 (left direction in FIG. 1), and a vertical frame member 13 that is fixed to an immovable part so as to be approximately perpendicular to the horizontal frame member 11 on the side opposite to the pulling direction. Furthermore, the lower surface of this frame body 10 (in other words, the surface facing the lower ends of the first door body 21 and the second door body 22) may be the floor or the ground, or it may be a lower frame member or door sill that extends between the left and right vertical frame members 12, 13.

[0024] The horizontal frame member 11 is formed in an inverted, approximately L-shaped cross section, having a top portion 11a facing the upper ends of the first door body 21 and the second door body 22, and a base portion 11b extending downward from one end of the top portion 11a in the forward direction (see Figures 2 and 7). A horizontal frame cover 14 is detachably attached to the horizontal frame member 11 so that the first door body 21 and the second door body 22 are placed between the horizontal frame member 11 and the base portion 11b. The horizontal frame member 11 and the horizontal frame cover 14 are configured to cover the upper ends of the first door body 21 and the second door body 22 in the left-right direction, and are sometimes called a crosspiece.

[0025] The top portion 11a is formed in the shape of a rectangular plate having a predetermined thickness and extends substantially horizontally between the left and right vertical frame members 12, 13. The top portion 11a and the left and right vertical frame members 12, 13 are substantially perpendicular to each other.

[0026] The base portion 11b is formed in a vertical plate shape and extends in the width direction along the top portion 11a. The base portion 11b is fastened to the wall portion W by fasteners such as screws, bolts, and rivets (not shown). The illustrated horizontal frame member 11 has a top portion 11a and a base portion 11b integrally formed by drawing or extruding a metal material (see FIGS. 2 and 7).

[0027] The horizontal frame cover 14 is a member with an inverted L-shaped cross section (see Figures 2 and 7), having an upper plate portion 14a that overlaps the upper surface of the ceiling portion 11a and a hanging plate portion 14b that hangs downward from this upper plate portion 14a to cover the hoist 31, etc., and is formed in a long shape that extends over approximately the entire length of the horizontal frame member 11 in the left-right direction. This horizontal frame cover 14 is removably attached to the top portion 11a by fasteners such as screws or bolts.

[0028] 3 and 7, reference numeral 11c denotes a lower cover that narrows the gap between the base portion 11b and the second door body 22 in the closing direction of the opening A. This lower cover 11c is an angle-shaped member that has one piece that is detachably fastened to the base portion 11b and another piece that protrudes from the one piece in the thickness direction of the frame body and extends in the width direction of the frame body. The protrusion amount of the other piece is set appropriately so as not to interfere with the tool T (see FIG. 7).

[0029] In addition, in FIG. 3, reference numeral 11d denotes a speed suppression device (for example, a damper device) that suppresses the moving speed of the first door body 21 during the closing operation. In addition, in FIG. 4, reference numeral 11e denotes an engaging and disengaging member that releasably engages and holds the hoist 31 near the door end of the second door body 22 when the door is fully opened.

[0030] The first door body 21 moves linearly between a position where it covers the portion of the opening A near the door pocket B and a position where it is housed within the door pocket B (see FIG. 3). The first door body 21 is a rectangular plate-shaped member having a predetermined thickness, and is composed of two plates arranged in the thickness direction, framework supporting these plates from the inside, a core material, etc. (see FIG. 2). A plurality of hoists 31 (described later) are supported at an upper end of the first door body 21 at intervals in the door width direction.

[0031] A recessed groove 21a that opens downward and extends across the width of the door is provided at the lower end of the first door body 21. An anti-vibration roller 32 is loosely fitted into this recessed groove 21a so as to rotate around an axis that extends in the vertical direction. The anti-vibration roller 32 is rotatably supported by a bracket, a shaft member, etc. fixed to the wall W, which is an immovable portion, and prevents the lower end side of the first door body 21 from vibrating in the door thickness direction.

[0032] The second door body 22 is linked to the opening and closing movement of the first door body 21 by a linkage mechanism 50, and opens and closes between a position where it overlaps with the first door body 21 in the door pocket section B and a position where it covers the opening A on the closing side of the first door body 21 (see Figure 4). The opening and closing path of the second door body 22 is shifted in the front direction with respect to the opening and closing path of the first door body 21 (see FIG. 2). That is, according to FIG. 1, the second door body 22 is located on the front side of the first door body 21.

[0033] The second door body 22 is a rectangular plate-shaped member having a predetermined thickness, and is composed of two plates arranged in the thickness direction, frameworks that support these plates from the inside, core materials, etc. (see FIG. 2). On both sides of the second door body 22, a handle portion 22b is provided so as to be positioned on the door tip side.

[0034] Similar to the first door body 21, a plurality of hoisting wheels 31 and a recessed groove 22a are provided at the upper and lower ends of this second door body 22. An anti-vibration roller 33 is loosely fitted into the recessed groove 22a on the lower end side of the second door body 22 so as to rotate around an axis in the vertical direction (see FIG. 2). The anti-vibration roller 33 is rotatably supported by a bracket, a shaft member, etc. fixed to the first door body 21, and prevents the lower end side of the second door body 22 from vibrating in the door thickness direction.

[0035] The hoist 31 is rotatably supported by a bearing bracket 34 . The bearing bracket 34 is configured to rotatably support the plurality of hoists 31 arranged in the opening and closing direction from both sides in the axial direction (see FIG. 2). The lower half of the bearing bracket 34 is formed so that a locking member 36 (described later) can be fastened thereto, and in the illustrated example, has a concave vertical cross section that continues in the opening and closing direction.

[0036] The hoist 31 and the bearing bracket 34 form an integrated hoist unit 30. In addition, the illustrated example of the hoist unit 30 has two hoists 31 attached to a single bearing bracket 34, but other examples include a configuration in which a single hoist 31 is attached to a single bearing bracket 34, or a configuration in which three or more hoists 31 are attached to a single bearing bracket 34.

[0037] The hoist unit 30 having the above-described configuration is attached to the upper end of the first door body 21 at intervals in the width direction (two in the illustrated example), and similarly attached to the upper end of the second door body 22 at the same time. Each hoist unit 30 rolls a plurality of hoists 31 on the first rail 41 or the second rail 42.

[0038] In the illustrated example, the means for connecting each hoist unit 30 to the first door body 21 or the second door body 22 is such that the bearing bracket 34 is connected to the first door body 21 or the second door body 22 by a bolt-shaped connecting member 35 located approximately in the center of the second door body 22 in the door thickness direction. Other examples of this connection means include a configuration in which the bearing bracket 34 is directly fixed to the first door body 21 or the second door body 22, or a configuration in which a connection member other than the illustrated example is used.

[0039] Of the multiple hoist units 30 described above, the hoist unit 30 attached to the door end side of the second door body 22 is provided with a locking member 36 for fastening the tip end side of the string-like member 64. The locking member 36 is configured to be selectively fastened to the door-closing side portion and the door-opening side portion of the bearing bracket 34 .

[0040] More specifically, the locking member 36, an example of which is shown in Figures 8 and 9, integrally comprises a base portion 36a that is detachably attached to the bearing bracket 34, and an engaging portion 36b that protrudes downward from the base portion 36a.

[0041] The base 36a is an angle-shaped member having one vertical side and the other horizontal side, and according to FIG. 8, is fitted into the front corner of the lower half of the bearing bracket 34. The one side of the base 36a has notches 36a1, 36a1 at one end and the other end in the door width direction (see FIG. 9). Each notch 36a1 is formed so that the shaft of a fastener 37 (for example, a screw or a bolt) that screws into the bearing bracket 34 can be inserted therethrough.

[0042] As shown in Figure 8(a), when the sliding door device 1 is configured so that the right side is the opening direction (hereinafter referred to as right-handed), the locking member 36 is fastened to the bearing bracket 34 by the fastener 37 on the left side of the hoist unit 30 of the second door body 22, using the left-side cutout portion 36a1.

[0043] Furthermore, as shown in Figure 8(b), when the sliding door device 1 is configured so that the left side is the opening direction (hereinafter referred to as left-handed), the locking member 36 is fastened to the bearing bracket 34 by the fastener 37 on the right side of the hoist unit 30 of the second door body 22, using the right-side cutout portion 36a1.

[0044] The engaging portion 36b is a member (for example, a screw, bolt, rivet, or the like) having a head and a shaft, and the shaft is fastened to the horizontal other piece of the base portion 36a with the head facing downward. When the locking member 36 is fastened to the bearing bracket 34, the engaging portion 36b is located at or near the center of the second door body 22 in the door thickness direction. A locking ring portion 64a (see FIG. 6) at the tip side of a string-like member 64 is hooked onto the shaft portion of this engaging portion 36b.

[0045] The first and second rails 41, 42 are fixed to the underside of the top portion 11a across the door opening and closing direction (the left-right direction in FIG. 1). The first rail 41 is a rail that guides the first door body 21 in the opening and closing direction, and is provided so as to face the upper end of the first door body 21 and extend in the width direction of the horizontal frame member 11 . The second rail 42 is a rail that guides the second door body 22 in the opening and closing direction, and is provided so as to face the upper end of the second door body 22 and extend in the width direction of the horizontal frame member 11 .

[0046] The first rail 41 is a member having a generally inverted concave cross section (see FIG. 2). Edges 41a, 41a are provided on the lower end of the first rail 41 so as to protrude inward from both sides in the door thickness direction and to suspend the hoist 31 in a rollable manner. The hoist unit 30 on the first door body 21 side is inserted into the first rail 41 from one longitudinal end side, and rolls on the edges 41a, 41a so that both axial ends of the hoist 31 are hooked on the inward edges 41a, 41a.

[0047] Similarly, the second rail 42 also has inwardly facing edges 42a, 42a. The hoist unit 30 on the second door body 22 side is inserted into the second rail 42 from one longitudinal end side, and both axial ends of the hoist 31 are hooked onto the inward edge portions 42a, 42a, and rolls on the edge portions 42a, 42a.

[0048] The interlocking mechanism 50 is a mechanism that interlocks the low-speed opening and closing operation of the second door body 22 with the high-speed opening and closing operation of the second door body 22 . As shown in Figure 5, this interlocking mechanism 50 comprises two pulley-like members 51, 52 spaced apart in the opening and closing direction at the upper end of the first door body 21, a string-like member 53 looped around these pulley-like members 51, 52, a fixing portion 54 that fixes a portion of the string-like member 53 to an immovable portion, and a tension adjusting portion 55 that fixes the other portion of the string-like member 53 to the upper end of the second door body 22 and adjusts the length of the string-like member 53.

[0049] Each of the pulley-like members 51, 52 is a disk-shaped member with a ring-shaped groove formed on its outer surface for fitting the string-like member 53, and its center is axially supported so as to be freely rotatable relative to the upper end of the first door body 21. One pulley-like member 51 is disposed closer to the leading edge of the first door body 21, and the other pulley-like member 52 is disposed closer to the trailing edge of the first door body 21.

[0050] The string-like member 53 is a long flexible member, and for example, a flexible wire, other string-like member, band-like member, or the like can be used. The string-like member 53 is looped around both the pulley-like members 51 and 52 .

[0051] The fixing portion 54 fastens the portion of the string-shaped member 53 on the wall portion W side to the wall portion W, which is an immovable portion, so that the string-shaped member 53 does not move in the longitudinal direction. The fixing part 54 in the illustrated example is made of an elastic material such as rubber. When excessive tension acts instantaneously on the string-like member 53 as the first door body 21 and the second door body 22 are opened or closed, the fixing part 54 relieves this tension by elastically deforming.

[0052] The tension adjusting portion 55 is interposed at a cut portion midway along the length of the string-like member 53 on the opposite side to the wall portion W in the door thickness direction. This tension adjustment unit 55 includes a rotating member 55a that is supported on the upper end of the second door body 22 so as to rotate around a vertical axis, and an adjustment screw 55b that adjusts the rotation angle of this rotating member 55a. One end of the cut portion of the string-like member 53 is fastened to one end of the rotating member 55a, and the other end of the cut portion of the string-like member 53 is fastened to the other end of the rotating member 55a.

[0053] According to the interlocking mechanism 50 configured as described above, the pulley-like members 51, 52 each act as a movable pulley, so when the second door body 22 moves in either of the opening and closing directions, the first door body 21 moves in the same direction at half the speed of the second door body 22. Furthermore, with the tension adjusting section 55, the rotation angle of the rotating member 55a changes depending on how tightly the adjusting screw 55b is tightened, so that the tension of the string-like member 53 can be adjusted appropriately. The interlocking mechanism 50 and tension adjusting section 55 may be those disclosed in Patent Document 1.

[0054] The traction device 60 also includes a main case 61, a winding body 62 biased in the winding rotation direction within the main case 61, a string-like member 64 having one end fixed to the winding body 62 and the other end unwound from the main case 61 and fixed to the bearing bracket 34 on the closing direction side of the second door body 22, and a traction force adjustment section 65 exposed to the outside from the underside of the main case 61.

[0055] The traction device 60 is configured such that the total length Z (maximum dimension) in the winding axis direction is smaller than either of the total lengths X, Y (maximum dimensions) in the winding radial direction (see FIG. 6). The total length X is the total length in the projection direction of the traction device 60. The total length Y is the total length in the width direction of the traction device 60. This traction device 60 is positioned at a height between the second door body 22 and the top portion 11a (in the illustrated example, between the second door body 22 and the first and second rails 41, 42) with the winding axis direction aligned vertically, and the main body case 61 is in contact with both the vertical frame member 12 and the base portion 11b of the horizontal frame member 11.

[0056] The main body case 61 integrally comprises a main body portion 61a containing the winding body 62 and the traction force adjustment portion 65, etc., and an attachment piece 61b protruding from the main body portion 61a in the opposite direction to the traction direction (to the right in the example of Figure 6). This main body case 61 is pressed against both the vertical frame member 12 and the base portion 11b of the horizontal frame member 11, and the mounting piece 61b is fastened to the base portion 11b by multiple (two in the illustrated example) fasteners 61c (e.g., screws, bolts, rivets, etc.) arranged in the width direction. That is, the main body case 61 is fitted into the corner between the vertical frame member 12 and the base portion 11b, and is fastened to the base portion 11b at a position away from the vertical frame member 12 by a fastener 61c.

[0057] In addition, the main body case 61 is not attached to either the vertical frame member 12 or the horizontal frame member 11 at any part other than the mounting piece 61b, such as the part on the towing direction side (the left side in the example of Figure 6).

[0058] The main body 61a is a rectangular box-like shape whose overall length in the winding axis direction is greater than its horizontal dimension, and has a flat surface so that it is in surface contact with the vertical frame member 12 and also in surface contact with the base portion 11b of the horizontal frame member 11. A traction force adjustment hole 61a1 that penetrates in the vertical direction is provided in the lower part of the main body 61a, and a guide indicator 61a2 (in the illustrated example, an arc-shaped arrow with the words "strong" and "weak" on either end) that indicates the operating direction of the traction force adjustment unit 65 is provided on the surrounding surface of this traction force adjustment hole 61a1. Furthermore, a through-hole (not shown) for pulling out the string-like member 64 is provided on the side of the main body 61a in the direction opposite to the pulling direction (to the right in FIG. 6).

[0059] The attachment piece 61b protrudes in a plate shape from the surface of the main body 61a on the side of the base portion 11b so as to extend in the direction opposite to the pulling direction (see FIG. 6). This mounting piece 61b is exposed to the front side when the horizontal frame cover 14 is removed, which makes it easy to perform replacement work by engaging a tool (for example, a screwdriver). The attachment piece 61b is provided with a plurality of through holes for inserting the fasteners 61c therethrough.

[0060] The winding body 62 is an approximately cylindrical member (including members called reels, bobbins, etc.) that is supported within the main body case 61 so that it can rotate in both directions with its axial direction facing up and down, and is biased in the winding direction by a biasing member (not shown) such as a power spring.

[0061] The string-like member 64 is a long flexible member such as a wire, and one end thereof is attached to the outer periphery of the winding body 62 .

[0062] The other end of the string-like member 64 is pulled out from the one end and fastened to the bearing bracket 34 on the closing direction side of the second door body 22 via a locking member 36 (see Figure 8). The pulled out string-like member 64 is approximately parallel to the width direction of the second door body 22 and is located approximately in the center of the second door body 22 in the door thickness direction. The other end of the string-like member 64 is provided with an annular locking ring portion 64a for locking onto the locking member 36, and a stopper member 64b for preventing the locking ring portion 64a from being pulled into the main body case 61 (see FIG. 6).

[0063] The traction force adjustment unit 65 is configured to adjust the biasing force of a biasing member (not shown) that biases the winding body 62 in the winding direction by rotating the part exposed to the outside through the traction force adjustment hole 61a1.

[0064] A cover member 63 is detachably attached to the outside of the main body case 61 so as to cover the lower side of the traction force adjustment hole 61a1. The cover member 63 is formed in a recessed shape that fits laterally into the main body portion 61a of the main body case 61 so that it does not unexpectedly fall off when attached or detached (see FIG. 7).

[0065] More specifically, the cover member 63 has a flat covering plate portion 63a that covers the traction force adjustment hole 61a1, a side piece portion 63b that stands up from the end of the covering plate portion 63a on the side opposite to the traction direction, and an upper piece portion 63c that protrudes from the upper end of the side piece portion 63b in the traction direction and is superimposed on the upper surface of the main body portion 61a (see Figure 7). The upper piece portion 63c has a shorter length in the projection direction than the covering plate portion 63a. The covering plate portion 63a is formed to a size that covers the traction force adjustment hole 61a1 and the guide display 61a2. The cover member 63 is detachably fastened to the main body portion 61a of the main body case 61 by fasteners 63d (for example, screws or bolts) inserted into the side piece portions 63b.

[0066] According to the sliding door device 1 configured as described above, the traction device 60, which has a small axial dimension, is arranged with its axial direction facing up and down, so the height dimension of the interlocking part formed by the horizontal frame member 11 etc. can be made relatively small.

[0067] Furthermore, since the main body case 61 of the traction device 60 is fixed so as to contact both the vertical frame member 12 and the horizontal frame member 11, the strength of the traction device 60 against loads in the rotational direction can be improved, and rattling and deformation of the traction device 60 can be prevented.

[0068] Furthermore, the attachment piece 61b of the traction device 60 on the opposite side to the traction direction is fastened to the base portion 11b at a position away from the vertical frame member 12 (see FIG. 6). This prevents the vertical frame member 12 from getting in the way during the fastening work, and allows the traction device 60 to be easily fastened from the front side.

[0069] Furthermore, the second door body 22 is pulled by the pulling device 60 without pulling the first door body 21. Therefore, compared to the mode in which the first door body 21 is pulled, the pulling force can be reduced, resulting in good operability.

[0070] Furthermore, since the cover member 63 is provided on the traction device 60, even if liquid such as lubricating oil leaks from the traction force adjustment hole 61a1, the liquid can be prevented from dripping down. Furthermore, since the cover member 63 hides the traction force adjustment hole 61a1 and the guide display 61a2, it is possible to prevent the traction force adjustment unit 65 from being manipulated by tampering or the like.

[0071] When adjusting the traction force of the traction device 60 for maintenance or the like, the cover member 63 is removed and the exposed traction force adjustment portion 65 is turned using a tool T such as a screwdriver.

[0072] Furthermore, since the string-like member 64 pulled out from the traction device 60 is fastened to the relatively sturdy bearing bracket 34, there is no need to provide a reinforced portion for traction on the second door body 22 itself.

[0073] In addition, the locking member 36 for locking the string-like member 64 of the traction device 60 can be easily switched depending on whether the sliding door device 1 is configured to be right-handed (see Figure 8(a)) or left-handed (see Figure 8(b)).

[0074] <Other embodiments> In the embodiment shown in FIGS. 10 and 11, the locking member 36 of the sliding door device 1 is replaced with a locking member 38. In the embodiment shown in FIGS. The locking member 38 is configured to be selectively fastened to the door-closing side portion and the door-opening side portion of the bearing bracket 34 . More specifically, the locking member 38 shown in FIGS. 10 and 11 integrally comprises a base portion 38a that is detachably attached to the bearing bracket 34, and an engaging portion 38b that protrudes downward from the base portion 38a.

[0075] The base 38a is an angle-shaped member having one vertical side and the other horizontal side, and is fitted onto the corner portion of the lower half of the bearing bracket 34 so as to overlap it. The one side of the base 38a is provided with notches 38a1 at one end and the other end in the door width direction. This cutout portion 38a1 is made up of a wide portion 38a11 that is wide in the lateral direction, and a narrow portion 38a12 that is narrower than the wide portion 38a11 and opens upward (see FIG. 11). The wide portion 38a11 is formed so that the shaft portion of the fastener 37 can be inserted near one end side and the other end side in the width direction. The narrow portion 38a12 has a width dimension slightly larger than that of the shaft portion of the fastener 37 so as to fit onto the shaft portion of the fastener 37 in the radial direction. The engaging portion 38b is the same member as the engaging portion 36b described above.

[0076] As shown in Figure 10(a), when the sliding door device 1 is configured to be right-handed, a fastener 37 is inserted into the right-hand portion of the wide portion 38a11 on the left side of the hoist unit 30 of the second door body 22, and this fastener 37 is screwed into the bearing bracket 34. Furthermore, as shown in Figure 10(b), when the sliding door device 1 is configured to be left-handed, a fastener 37 is inserted into the left-side portion of the wide portion 38a11 on the right side of the hoist unit 30 of the second door body 22, and this fastener 37 is screwed into the bearing bracket 34.

[0077] Therefore, in the embodiment shown in Figs. 10 and 11, the locking member 38 can be easily replaced depending on whether the sliding door device 1 is oriented left or right.

[0078] In the embodiment shown in FIG. 12, the locking member 36 of the sliding door device 1 is replaced with two locking members 39. The locking members 39 are provided on both the door-closing side and the door-opening side of the bearing bracket 34. Each locking member 39 is a generally shaft-shaped member (for example, a screw, bolt, rivet, or the like) having a shaft and a head, and the shaft is fastened to the bearing bracket 34 with the head pointing downward. A cylindrical spacer 39a is attached to the shaft, and this cylindrical spacer 39a is engaged with a locking ring 64a at the tip of the string-like member 64. It is also possible to omit the cylindrical spacer 39a and directly engage the string-like member 64 with the shaft.

[0079] As shown in FIG. 12( a ), when the sliding door device 1 is configured to be right-handed, a string-like member 64 is fastened to the left-side locking member 39 of the hoist unit 30 of the second door body 22 . Furthermore, as shown in FIG. 12( b ), when the sliding door device 1 is configured to be left-handed, a string-like member 64 is fastened to the right-side locking member 39 of the hoist unit 30 of the second door body 22 . In this way, according to the embodiment shown in FIG. 12, it is possible to easily accommodate cases where the sliding door device 1 has different left and right orientations.

[0080] In the above embodiment, the door body is pulled by the traction device to perform the closing operation, but as another example, it is also possible to configure the door body to be pulled by the traction device to perform the closing operation.

[0081] Furthermore, in the above embodiment, a multiple sliding door device is configured in which two door bodies are linked to open and close, but as other examples, it is also possible to configure a multiple sliding door device in which three or more door bodies are linked to open and close, or to configure a sliding door device in which a single door body is opened and closed.

[0082] Furthermore, according to the above embodiment, as a particularly preferred example, the second door body 22 is configured to be pulled by the traction device 60 to perform the closing operation, but as another example, it is also possible to configure the first door body 21 to be pulled by the traction device 60 to perform the closing operation.

[0083] Furthermore, according to the above embodiment, as a preferred example, a hanging sliding door device is configured in which the door body is hung by a hoist to perform opening and closing operations. However, as another example, it is also possible to apply at least a part of the above-mentioned configuration to a sliding door device in which the door body is opened and closed by rolling a door roller at the lower end of the door body on a rail on the lower frame.

[0084] Furthermore, the present invention is not limited to the above-described embodiments, and can be modified as appropriate within the scope of the present invention. [Explanation of symbols]

[0085] 1: Sliding door device 10:Frame body 11: Horizontal frame member 11a: Heaven 11b: Base section 12: Vertical frame member 21: First Door 22: The Second Door 36, 38, 39: Locking member 60: Traction device 61: Main unit case 61a: Main body 61a1: Traction force adjustment hole 61b: Mounting piece 62: Winding body 63: Cover material 64: String-like member 65: Traction force adjustment section A: Opening B: Door bag club W: Wall

Claims

1. The device comprises a frame body provided around the opening, a door body that moves left and right inside the frame body to open and close the opening, and a traction device that traction the door body in the opening direction or the closing direction, The frame body includes a horizontal frame member extending in the left-right direction above the door body, and a vertical frame member intersecting the horizontal frame member on the pulling direction side, The traction device includes a main body case, a winding body rotatably housed within the main body case and biased in a winding rotation direction, and a string-like member having one end fixed to the winding body and the other end unwound from the main body case and fixed to the door body, the main body case is provided so as to contact both the vertical frame member and the horizontal frame member, and a portion on the opposite side to the pulling direction side is fastened to the horizontal frame member by a fastener, The horizontal frame member has a top portion facing the upper end of the door body and a base portion extending downward from one end side of the top portion in the projection direction, A horizontal frame cover having a hanging plate portion hanging downward from the top portion of the horizontal frame member is detachably attached to the horizontal frame member, the main body case has an attachment piece integrally therewith, the attachment piece protruding in a direction opposite to the pulling direction, and the attachment piece is fastened to the base portion by the fastener; A sliding door device characterized in that the mounting piece is exposed to the front side when the horizontal frame cover is removed.

2. A door system comprising: a frame body provided around an opening; a door body that moves left and right inside the frame body to open and close the opening; and a traction device that pulls the door body in the opening or closing direction; The frame body includes a horizontal frame member extending in the left-right direction above the door body, and a vertical frame member intersecting the horizontal frame member on the pulling direction side, The traction device includes a main body case, a winding body rotatably housed within the main body case and biased in a winding rotation direction, and a string-like member having one end fixed to the winding body and the other end unwound from the main body case and fixed to the door body, the main body case is provided so as to be in contact with both the vertical frame members and the horizontal frame members, The horizontal frame member has a top portion facing the upper end of the door body and a base portion extending downward from one end side of the top portion in the projection direction, A sliding door device characterized in that the main body case is provided so as to contact both the vertical frame members and the base portions of the horizontal frame members.

3. A door system comprising: a frame body provided around an opening; a door body that moves left and right inside the frame body to open and close the opening; and a traction device that traction the door body in the opening or closing direction; The frame body includes a horizontal frame member extending in the left-right direction above the door body, and a vertical frame member intersecting the horizontal frame member on the pulling direction side, The traction device includes a main body case, a winding body rotatably housed within the main body case and biased in a winding rotation direction, and a string-like member having one end fixed to the winding body and the other end unwound from the main body case and fixed to the door body, the main body case is provided so as to be in contact with both the vertical frame members and the horizontal frame members, The main body case is provided with a traction force adjustment hole, a traction force adjustment section is provided inside the main body case so as to be exposed to the outside through the traction force adjustment hole, A sliding door device characterized in that a detachable cover member is provided on the outside of the main body case so as to cover the lower side of the traction force adjustment hole.

4. A door system comprising: a frame body provided around an opening; a door body that moves left and right inside the frame body to open and close the opening; and a traction device that pulls the door body in the opening or closing direction; The frame body includes a horizontal frame member extending in the left-right direction above the door body, and a vertical frame member intersecting the horizontal frame member on the pulling direction side, The traction device includes a main body case, a winding body rotatably housed within the main body case and biased in a winding rotation direction, and a string-like member having one end fixed to the winding body and the other end unwound from the main body case and fixed to the door body, the main body case is provided so as to be in contact with both the vertical frame members and the horizontal frame members, A hoist provided on the upper end side of the door body and a rail that suspends the hoist and rolls in the door body opening and closing direction, The hoist is rotatably supported by a bearing bracket fixed to the upper end side of the door body, the other end of the string-like member is fixed to the bearing bracket, The bearing bracket is provided with a locking member to which the other end of the string-like member is locked, The sliding door device is characterized in that the locking member is configured to be selectively fastened to a door body closing side portion and a door body opening side portion of the bearing bracket.

5. A door system comprising: a frame body provided around an opening; a door body that moves left and right inside the frame body to open and close the opening; and a traction device that traction the door body in the opening or closing direction; The frame body includes a horizontal frame member extending in the left-right direction above the door body, and a vertical frame member intersecting the horizontal frame member on the pulling direction side, The traction device includes a main body case, a winding body rotatably housed within the main body case and biased in a winding rotation direction, and a string-like member having one end fixed to the winding body and the other end unwound from the main body case and fixed to the door body, the main body case is provided so as to be in contact with both the vertical frame members and the horizontal frame members, A hoist provided on the upper end side of the door body and a rail that suspends the hoist and rolls in the door body opening and closing direction, The hoist is rotatably supported by a bearing bracket fixed to the upper end side of the door body, the other end of the string-like member is fixed to the bearing bracket, The bearing bracket is provided with a locking member to which the other end of the string-like member is locked, A sliding door device characterized in that the locking member is provided on both the door body closing side portion and the door body opening side portion of the bearing bracket.

6. The sliding door device according to any one of claims 2 to 5, wherein the main body case has a portion on the opposite side to the pulling direction side fastened to the horizontal frame member by a fastener.

7. The sliding door device according to any one of claims 2 to 6, wherein the main body case is in surface contact with the vertical frame members and also in surface contact with the horizontal frame members.

8. The door body includes at least a first door body that opens and closes at the door end side, and a second door body that is linked to the opening and closing operation of the first door body and opens and closes between a position overlapping the first door body and a position closer to the closing direction than the first door body, The sliding door device according to any one of claims 2 to 7, wherein the cord-like member is pulled out substantially parallel to the width direction of the second door body and fastened to the second door body.

9. The sliding door device according to any one of claims 2 to 7, wherein the traction device traction the door body in a closing direction.

10. 4. The sliding door device according to claim 3, wherein the cover member is formed so as to fit into the main body case from the side in a concave shape.

11. A hoist provided on the upper end side of the door body and a rail that suspends the hoist and rolls in the door body opening and closing direction, The hoist is rotatably supported by a bearing bracket fixed to the upper end side of the door body, 4. The sliding door device according to claim 2, wherein the other end of the string-like member is fixed to the bearing bracket.

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