Door device

Abstract

To provide a door device that enables improvement in strength without causing an increase in material.SOLUTION: Means for solving the above problems is a door device 1 for opening and closing an opening O of a vinyl house H, comprising a door frame 4 having a pair of left and right vertical frames 2, 2 and a pair of upper and lower horizontal beams 3A and 3C bridged between the vertical frames 2, 2; a door roller bar 6 to which a door roller 5 running on an upper frame of the opening O is connected, and which is connected to the upper horizontal beam 3A; and a reinforcing metal fitting 8 fitted into the door roller bar 6 and having a width shorter than that of the door roller bar 6. The door roller bar 6 has an upper wall 60 and a lower wall 61 which are parallel to a width direction of the door frame 4 and face each other in a vertical direction, and a lateral wall 62 connecting respective one ends in a depth direction of the upper wall 60 and the lower wall 61. The reinforcing metal fitting 8 includes a pair of opposing pieces 80, 80 facing the upper wall 60 and the lower wall 61, and a connecting piece 81 connecting respective ends on the opposite side to the lateral wall of the opposing pieces 80, 80.SELECTED DRAWING: Figure 6

Description

Technical Field

[0001] This invention relates to a door device.

Background Art

[0002] As a door device, there is one that opens and closes an opening formed by a portal frame provided in a simple structure such as a plastic greenhouse. For example, the door device shown in Patent Document 1 includes a door frame composed of a pair of left and right vertical frames and a plurality of horizontal bars spanned between the pair of vertical frames, and an upper horizontal bar (door wheel bar) which is a horizontal bar spanned between the upper ends of the pair of vertical frames among the plurality of horizontal bars. A door wheel that is connected to the upper horizontal bar and can run in a rail arranged along the upper frame of the opening of the simple structure, and a film that is fixed to a film fixing portion provided on the door frame and is extended to cover the outdoor side of the door frame.

[0003] Such a conventional door device can open and close the opening by sliding in the width direction of the simple structure along the rail. Therefore, when the door device is open, people and objects can enter and exit the simple structure through the opening, and when the door device is closed, it can prevent animals from entering the simple structure through the opening and rain and wind from blowing into the simple structure.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] In such a door device, since the load concentrates on the connecting portion of the door wheel bar with the door wheel, it is necessary to increase the wall thickness of the entire door wheel bar according to the strength required for the connecting portion of the door wheel bar, which has caused an increase in materials.

[0006] Therefore, an object of the present invention is to provide a door device that can improve strength without causing an increase in materials.

Means for Solving the Problem

[0007] To achieve the above object, the present invention provides a door device that is provided in an opening formed by a portal-shaped frame provided in a simple structure and is slidable in the width direction of the simple structure to open and close the opening. The door device includes a door frame having a pair of left and right vertical frames and a pair of upper and lower horizontal bars spanned between the vertical frames, a wheel bar connected to a wheel running on the upper frame of the opening and connected to the upper horizontal bar disposed above among the horizontal bars, and a reinforcing metal fitting fitted in the wheel bar and shorter in width than the wheel bar. The wheel bar has an upper wall and a lower wall that are parallel to the width direction of the door frame and face each other in the vertical direction, and a transverse wall connecting one end of the upper wall and the lower wall on the depth direction side. The reinforcing metal fitting has a pair of opposing pieces facing the upper wall and the lower wall, and a connecting piece connecting the ends of the opposing pieces on the side opposite to the transverse wall. According to this configuration, the portion of the wheel bar where the reinforcing metal fitting is fitted forms a box shape in cooperation with the reinforcing metal fitting and the wheel bar, so that the strength is improved.

[0008] Further, the door device of the present invention includes a connecting fitting for connecting the wheel and the wheel bar. The connecting fitting has a holding body for rotatably holding the wheel, a protruding shaft protruding from the holding body, a bolt shaft having a smaller diameter than the protruding shaft and protruding from the tip of the protruding shaft and having a screw groove on the outer periphery, and a stepped portion formed between the protruding shaft and the bolt shaft. An upper wall is provided with a bolt insertion hole having a smaller diameter than the protruding shaft and into which the bolt shaft can be inserted. An opposing piece facing the upper wall is provided with an insertion hole that can face the bolt insertion hole. The opposing piece and the upper wall may be sandwiched by a nut screwed onto the bolt shaft inserted into the bolt insertion hole and the insertion hole and the stepped portion from the upper wall side. According to this configuration, in the wheel bar, only the portion where the most load is applied can be effectively reinforced.

[0009] In addition, in the door device of the present invention, the reinforcing metal fitting may have an opening window that faces the bolt shaft in the radial direction of the bolt shaft with respect to the bolt insertion hole and the bolt shaft inserted into the insertion hole. According to this configuration, since the operation of screwing the nut onto the bolt shaft can be performed through the opening window, the operation of connecting the door wheel and the reinforcing metal fitting to the door wheel rail becomes easy.

[0010] In addition, in the door device of the present invention, the reinforcing metal fitting may have a protruding piece that protrudes parallel to the opposing piece from the end on the opposite side wall of each opposing piece, and the door wheel rail may have a pair of upper and lower restricting portions that face each opposing piece and each protruding piece and restrict the movement of the reinforcing metal fitting in the vertical direction and the depth direction. According to this configuration, since the movement of the reinforcing metal fitting in the vertical direction and the depth direction is restricted by the restricting portions, it is possible to prevent the reinforcing metal fitting from tilting in the depth direction or rattling in the vertical direction within the door wheel rail.

Effect of the Invention

[0011] According to the door device of the present invention, the strength can be improved without causing an increase in material.

Brief Description of the Drawings

[0012]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Figure 12

Mode for Carrying Out the Invention

[0013] Hereinafter, the present embodiment will be described with reference to the drawings. The same reference numerals attached through several drawings indicate the same parts.

[0014] As shown in FIG. 1, the door device 1 of the present embodiment is provided in an opening O formed by a portal frame W provided in a vinyl house H as a simple structure, and is slidable in the left-right direction in the drawing, which is the width direction of the vinyl house H, to open and close the opening O. In the present embodiment, the door devices 1 are provided in pairs on the left and right with respect to the frame W. When each door device 1 is slid left and right with respect to the frame W to separate the door devices 1 from each other, the opening O is opened, and when the door devices 1 are brought close to and adjacent to each other, the opening O is closed.

[0015] Specifically, as shown in FIG. 2, each door device 1 includes a door frame 4 having a pair of left and right vertical frames 2, 2 and a plurality of horizontal rails 3A, 3B, 3C spanned between the vertical frames 2, 2, and a door wheel 5 running on the upper frame of the opening O is connected to a door wheel rail 6 connected to the upper horizontal rail 3A disposed at the uppermost position among the horizontal rails 3A, 3B, 3C. A door film S is stretched on the door frame 4. Further, a handle fitting 9 functioning as a handle is connected to the right vertical frame 2 in FIG. 2 of the door frame 4.

[0016] As shown in Fig. 1, the plastic greenhouse H of the present embodiment is composed of a plurality of arch pipes Fa arranged side by side in the depth direction, and a plurality of roof-side film fixing frames Fb spanned along the depth direction between the arch pipes Fa, Fa. The framework F is provided with a roof-side film S1 fixed to the roof-side film fixing frame Fb to cover the side surface from the roof, and is formed in a substantially boat shape.

[0017] Furthermore, as shown in Fig. 1, the plastic greenhouse H includes a plurality of vertical columns 11 that support the arch pipe Fa arranged on the wife side from below and are arranged side by side along the width direction of the plastic greenhouse H, a plurality of horizontal columns 12 spanned between the respective vertical columns 11 along the width direction of the plastic greenhouse H, and a wife-side film S2 that covers the surface except for the opening O. Although not shown, the horizontal column 12 is provided with a film fixing groove, and the wife-side film S2 covering the wife surface is fixed through the film fixing groove. In the present embodiment, as shown in Fig. 1, the portal frame W forming the opening O is composed of a pair of adjacent vertical columns 11, 11 among the plurality of vertical columns 11, and a horizontal column 12 spanned between the pair of vertical columns 11, 11 to form the upper frame of the opening O. By extending the wife-side film S2 through the film fixing groove of the horizontal column 12 in the portion other than the opening O, the opening O functions as an entrance and exit of the plastic greenhouse H. The opening O may be provided on at least one wife side of the plastic greenhouse H, or may be provided on both sides.

[0018] Returning, on the wife side of the plastic greenhouse H, as shown in Fig. 1, a rail 13 is provided which is installed to span between the vertical columns 11, 11 along the upper frame of the opening O. A pair of left and right door devices 1, 1 for opening and closing the opening O are suspended slidably in the width direction of the plastic greenhouse H via a door wheel 5 described later on the rail 13. Although not shown, a lower rail may also be installed below the opening O, and the door device 1 may be slidably mounted between the rail 13 and the lower rail.

[0019] In the present embodiment, the door device 1 is provided at the opening O of the greenhouse H, but it may be provided at the opening of a simple structure other than the greenhouse H, for example, a simple warehouse or the like.

[0020] Next, the door device 1 of the present embodiment will be described in detail. Since each door device 1 has the same configuration, only one of the door devices 1 will be described in detail. Note that the opening O may be opened and closed by one or three or more door devices 1, and the number of door devices 1 is not particularly limited. Further, hereinafter, when viewing the greenhouse H from the wife's side, the front side of the door device 1 will be simply referred to as the "outdoor side", and the back side of the door device 1 when viewed from the wife's side of the greenhouse H will be simply referred to as the "indoor side" for explanation.

[0021] As shown in FIG. 2, the door device 1 of the present embodiment includes a door frame 4 having a pair of left and right vertical frames 2, 2 and five horizontal bars 3A, 3B, 3C spanned between the vertical frames 2, 2, a door wheel bar 6 to which two door wheels 5 are connected and which is connected to the upper part of the upper horizontal bar 3A, and a lower bar 7 connected to the lower part of the lowermost lower horizontal bar 3B. Further, as shown in FIG. 1, a door film S covering the door frame 4 is stretched on the door frame 4.

[0022] Also, as shown in FIGS. 3 and 4, the door frame 4 has a first fixing portion 40 provided at one of the outdoor side end or the indoor side end and capable of fixing a soft film Sa such as a polyolefin film such as a vinyl chloride film as the door film S, and a second fixing portion 41 provided at the other of the outdoor side end or the indoor side end and capable of fixing a hard film Sb such as a polyester film, a fluorine film, or a PET film as the door film S.

[0023] Therefore, when stretching the soft film Sa on the door frame 4, as shown in FIG. 3, the first fixing portion 40 of the door frame 4 may be directed to the outdoor side and the soft film Sa may be fixed to the first fixing portion 40. When stretching the hard film Sb on the door frame 4, as shown in FIG. 4, the second fixing portion 41 of the door frame 4 may be directed to the outdoor side and the hard film Sb may be fixed to the second fixing portion 41.

[0024] That is, in the present embodiment, by selecting whether the first fixing portion 40 or the second fixing portion 41 of the door frame 4 faces the outdoor side, the door film S extending to the door frame 4 can be arbitrarily selected from the soft film Sa and the hard film Sb.

[0025] Hereinafter, each part of the door device 1 will be described in detail by taking the door device 1 in which the first fixing portion 40 of the door frame 4 is arranged facing the outdoor side as an example.

[0026] As shown in FIG. 2, the door frame 4 of the present embodiment includes a pair of left and right vertical frames 2, 2, an upper horizontal rail 3A spanned near the upper ends of the vertical frames 2, 2, a lower horizontal rail 3B spanned near the lower ends of the vertical frames 2, 2, and three intermediate horizontal rails 3C arranged at a predetermined interval between the upper horizontal rail 3A and the lower horizontal rail 3B and spanned between the vertical frames 2, 2. Note that the number of the intermediate horizontal rails 3C may be arbitrarily determined, and the intermediate horizontal rails 3C may be omitted.

[0027] As shown in FIG. 5, the vertical frame 2 of the present embodiment has a hollow box-shaped cross section, and includes an inner side surface portion 20 facing the inside of the door frame 4, an outer side surface portion 21 facing the inner side surface portion 20 in the width direction of the door frame 4 (left and right direction in FIG. 5), one side surface portion 22 connecting the outdoor side ends (lower side in FIG. 5) which are the outdoor sides in the depth direction of the inner side surface portion 20 and the outer side surface portion 21 (up and down direction in FIG. 5), and the other side surface portion 23 connecting the indoor side ends (upper side in FIG. 5) which are the indoor sides in the depth direction of the inner side surface portion 20 and the outer side surface portion 21.

[0028] The inner side surface portion 20 of the present embodiment is flat plate-shaped and connects the left ends of the one side surface portion 22 and the other side surface portion 23 in FIG. 5. Further, a pair of positioning protrusions 20a, 20a protruding from the depth direction side ends of the inner side surface portion 20 toward the inside of the door frame 4 are provided on the inner side surface portion 20.

[0029] The outer side surface portion 21 of the present embodiment is flat plate-shaped and connects the right ends of the one side surface portion 22 and the other side surface portion 23 in FIG. 5. Further, as shown in FIG. 5, the length of the outer side surface portion 21 in the depth direction is shorter than that of the inner side surface portion 20, and the outdoor side end of the outer side surface portion 21 is located closer to the indoor side than the outdoor side end of the inner side surface portion 20.

[0030] As shown in FIG. 5, one side surface portion 22 of the present embodiment includes a flat portion 22a in the shape of a flat plate that extends vertically from the outdoor-side end of the outer side surface portion 21 toward the inner side surface portion 20, a pair of upright portions 22b and 22c that curve from the left and right ends of the flat portion 22a in FIG. 5 and stand up while inclining in a direction approaching each other, a pair of protruding portions 22d and 22e that protrude from the tips of the respective upright portions 22b and 22c in a direction approaching each other, and a connecting portion 22f that connects the outdoor-side end of the inner side surface portion 20 and the tip of the left-side upright portion 22b in the figure.

[0031] Then, as shown in FIG. 5, a fixing groove 40A with an opening width narrower than the width of the bottom is formed by the flat portion 22a, the pair of upright portions 22b and 22c, and the pair of protruding portions 22d and 22e. Although it will be described in detail later, the fixing groove 40A constitutes a part of the first fixing portion 40 where the soft film Sa can be fixed.

[0032] As shown in FIG. 5, the other side surface portion 23 of the present embodiment includes flat plate-shaped connecting plate portions 23a and 23a that extend vertically from the indoor-side end of the inner side surface portion 20 and the indoor-side end of the outer side surface portion 21 in a direction approaching each other, concave portions 23b and 23b with an L-shaped cross-section that extend from the tips of the respective connecting plate portions 23a and 23a toward the one side surface portion 22 and whose tips protrude in a direction approaching each other, and a convex portion 23c with a trapezoidal cross-section that connects the tips of the respective concave portions 23b and 23b and protrudes from the tips of the respective concave portions 23b and 23b toward the indoor side. Further, a guide groove 23d is formed at the center of the convex portion 23c along the longitudinal direction of the vertical frame 2. And although it will be described in detail later, the convex portion 23c constitutes a part of the second fixing portion 41 where the hard film Sb can be fixed.

[0033] Also, as shown in FIG. 5, at the indoor-side end of the outer surface portion 21 and at the tip of the standing portion 22c on the right side in the drawing, there are provided hook pieces 21a and 22g having an L-shaped cross section that protrude in directions in which their tips approach each other and the tips face each other. As a result, an attachment groove 24 is formed by the outer surface portion 21, the standing portion 22c on the right side in FIG. 5, and the hook pieces 21a and 22g, and the opening width of the attachment groove 24 is narrower than the width of the bottom portion (the width in the depth direction of the vertical frame 2) formed by the outer surface portion 21 and the standing portion 22c. Although not shown, an additional member can be appropriately attached to the attachment groove 24. The additional member is not particularly limited as long as it can be attached to the attachment groove 24. For example, it may be a rubber plate in which rubber is fixed to a plate that can be inserted into and connected to the attachment groove 24. When the rubber plate is attached to the attachment groove 24 of the vertical frame 2 facing the other door device 1, when the pair of door devices 1, 1 are brought close to each other to close the opening O, the impact when the door devices 1, 1 abut against each other can be mitigated. However, nothing may be attached to the attachment groove 24.

[0034] Next, the upper horizontal rail 3A, the lower horizontal rail 3B, and the intermediate horizontal rail 3C spanned between the pair of vertical frames 2, 2 will be described in detail. Since these horizontal rails 3A, 3B, 3C all have the same structure, the upper horizontal rail 3A will be described as an example, and the description of the lower horizontal rail 3B and the intermediate horizontal rail 3C will be omitted.

[0035] As shown in FIG. 6, the upper horizontal rail 3A of the present embodiment has a hollow box-shaped cross section, and includes an upper surface portion 30 facing the door wheel rail 6 to be described later, a lower surface portion 31 facing the upper surface portion 30 in the vertical direction, one side surface portion 32 connecting the outdoor-side ends (the left side in FIG. 6) that are on the outdoor side in the depth direction (the left-right direction in FIG. 6) of the upper surface portion 30 and the lower surface portion 31, and the indoor-side ends (the right side in FIG. 6) that are on the indoor side in the depth direction of the upper surface portion 30 and the lower surface portion 31.

[0036] As shown in FIG. 6, one side surface portion 32 of the present embodiment includes a flat plate portion 32a that connects the outdoor-side ends of the upper side surface portion 30 and the lower side surface portion 31, and a pair of upper and lower side walls 32b and 32c that curve from the upper and lower ends of the flat plate portion 32a and stand up while inclining in a direction approaching each other, and a pair of protruding portions 32d and 32d that protrude from the tips of the respective side walls 32b and 32c in a direction approaching each other. And a fixing groove 40B with an opening width narrower than the width of the bottom is formed by the flat plate portion 32a, the pair of side walls 32b and 32c, and the pair of protruding portions 32d and 32d. Although it will be described in detail later, the fixing groove 40B constitutes a part of the first fixing portion 40 capable of fixing the soft film Sa.

[0037] Furthermore, as shown in FIG. 6, on the one side surface portion 32, a first socket 37 is provided that protrudes from the central position in the vertical direction on the inner surface of the one side surface portion 32 toward the other side surface portion 33 side and has a C-shaped cross section at the tip. Note that the tip of the first socket 37 may have a circular cross section.

[0038] As shown in FIG. 6, the other side surface portion 33 of the present embodiment includes a convex portion 33a having a trapezoidal cross section that extends along the axial direction of the upper horizontal rail 3A, which is the width direction of the door frame 4, and protrudes from the center of the upper horizontal rail 3A toward the indoor side, a flat plate-shaped first connection portion 33b that connects the upper end of the convex portion 33a and the indoor-side end of the upper side surface portion 30, and a flat plate-shaped second connection portion 33c that connects the lower end of the convex portion 33a and the indoor-side end of the lower side surface portion 31. Also, a guide groove 33d is formed in the center of the convex portion 33a along the longitudinal direction of the upper horizontal rail 3A. And although it will be described in detail later, the convex portion 33a constitutes a part of the second fixing portion 41 capable of fixing the hard film Sb.

[0039] As shown in FIG. 6, the upper side surface portion 30 of the present embodiment includes a flat plane portion 30a that connects the upper ends of the one side surface portion 32 and the other side surface portion 33, and a pair of ribs 30b and 30b formed along the axial direction of the upper horizontal rail 3A, which is the width direction of the door frame 4, on the plane portion 30a.

[0040] Further, at the indoor-side end of the upper-side surface 30 and at the tip of the upper-side wall 32b of one-side surface 32, as shown in Fig. 6, there are provided holding plates 30c and 32e having an L-shaped cross section that protrude in directions where their tips approach each other and whose tips face each other, and protrusions 30d and 32f that protrude downward from the tips of the holding plates 30c and 32e.

[0041] As a result, at the upper part of the upper horizontal rail 3A, as shown in Fig. 6, a fitting groove 35 with an opening width narrower than the width of the bottom surface formed by the flat surface portion 30a of the upper-side surface 30, the upper-side wall 32b in Fig. 6, and the holding plates 30c and 32e (the width in the depth direction of the upper horizontal rail 3A) is formed along the axial direction of the upper horizontal rail 3A, which is the width direction of the door frame 4.

[0042] Also, as shown in Fig. 6, the lower-side surface 31 of the present embodiment includes a flat surface portion 31a that connects the lower ends of one-side surface 32 and the other-side surface 33, and a pair of ribs 31b and 31b that are formed along the axial direction of the upper horizontal rail 3A, which is the width direction of the door frame 4, on the flat surface portion 31a.

[0043] Then, at the indoor-side end of the lower-side surface 31 and at the tip of the lower-side wall 32c of one-side surface 32, as shown in Fig. 6, there are provided holding plates 31c and 32g having an L-shaped cross section that protrude in directions where their tips approach each other and whose tips face each other, and protrusions 31d and 32h that protrude upward from the tips of the holding plates 31c and 32g.

[0044] As a result, at the lower part of the upper horizontal rail 3A, a fitting groove 36 with an opening width narrower than the width of the bottom surface formed by the flat surface portion 31a of the lower-side surface 31, the lower-side wall 32c in Fig. 6, and the holding plates 31c and 32g (the width in the depth direction of the upper horizontal rail 3A) is formed along the axial direction of the upper horizontal rail 3A, which is the width direction of the door frame 4. And the upper horizontal rail 3A of the present embodiment has a line-symmetrical shape with the center in the vertical direction as the axis of symmetry, as shown in Fig. 6.

[0045] Next, the door wheel rail 6 of the present embodiment will be described in detail. As shown in FIG. 6, the door wheel rail 6 of the present embodiment includes an upper wall 60 and a lower wall 61 that are parallel to the width direction of the door frame 4 and face each other in the vertical direction, and a transverse wall 62 that connects the outdoor-side ends of the upper wall 60 and the lower wall 61 in the depth direction of the door frame 4. And, a fitting portion that can be fitted into the fitting groove 35 of the upper horizontal rail 3A is provided on the lower wall 61. By fitting the fitting portion into the fitting groove 35, the door wheel rail 6 is connected to the upper part of the upper horizontal rail 3A. In addition, in the present embodiment, the door wheel rail 6 is arranged such that the transverse wall 62 faces the outdoor side, but it may be arranged such that the transverse wall 62 faces the indoor side.

[0046] Specifically describing each part of the door wheel rail 6 of the present embodiment, as shown in FIG. 6, the lower wall 61 of the present embodiment has a width slightly narrower than the width of the bottom of the fitting groove 35 (the depthwise width of the upper horizontal rail 3A) and is a flat plate-like plate portion 61a as a fitting portion that can be slidably inserted into and fitted into the fitting groove 35, a pair of left and right standing pieces 61b, 61c in the drawing that stand vertically from the upper part of the plate portion 61a and face each other in the depth direction, and a connecting piece 61d that connects the lower end of the standing piece 61b on the left side in the drawing arranged on the outdoor side and the transverse wall 62.

[0047] Since the width of the plate portion 61a of the door wheel rail 6 is set to be slightly narrower than the width of the bottom of the fitting groove 35 and wider than the opening width of the fitting groove 35 in this way, when the plate portion 61a is fitted into the fitting groove 35, the plate portion 61a is caught by the holding plates 30c, 32e. Therefore, when the plate portion 61a is fitted into the fitting groove 35, the door wheel rail 6 is connected to the upper part of the upper horizontal rail 3A.

[0048] Also, as shown in FIG. 6, protruding upward at both ends in the depth direction of the plate portion 61a, in a state where the plate portion 61a is fitted into the fitting groove 35, there are provided projecting pieces 61e, 61e that face and contact in the depth direction with the protrusions 30d, 32f that protrude downward from the tips of the respective holding plates 30c, 32e. Therefore, in a state where the plate portion 61a is fitted into the fitting groove 35, the upper horizontal rail 3A and the door wheel rail 6 do not rattle in the depth direction.

[0049] Also, as shown in FIG. 6, the door wheel rail 6 has a pair of upper and lower restricting protrusions 62a and 62b that protrude from the transverse wall 62 toward the indoor side and face each other. Further, the door wheel rail 6 has an upper restricting piece 60a with an L-shaped cross section that protrudes downward from the end of the upper wall 60 on the side opposite to the transverse wall and whose tip faces the upper restricting protrusion 62a. The upper restricting piece 60a, together with the upper restricting protrusion 62a, constitutes an upper restricting portion 64 that restricts the movement of a reinforcing fitting 8, which will be described later, in the vertical and depth directions.

[0050] Also, as shown in FIG. 6, the door wheel rail 6 has a lower restricting piece 61f with a U-shaped cross section that protrudes from the side opposite to the transverse wall of the upright piece 61c on the right side of the lower wall 61 in the drawing and whose tip faces the lower restricting protrusion 62b. The lower restricting piece 61f, together with the lower restricting protrusion 62b, constitutes a lower restricting portion 65 that restricts the movement of the reinforcing fitting 8, which will be described later, in the vertical and depth directions.

[0051] Also, as shown in FIG. 6, the lower wall 61 is provided with a second socket 67 with a C-shaped cross section that protrudes from the central position of the plate portion 61a toward the upper wall 60 side. Note that the shape of the second socket 67 may be circular in cross section.

[0052] Also, as shown in FIG. 6, a reinforcing fitting 8, which is set to have an axial length shorter than that of the door wheel rail 6 and partially reinforces the strength of the door wheel rail 6, is fitted inside the door wheel rail 6. As shown in FIGS. 6 and 7, the reinforcing fitting 8 of the present embodiment includes a pair of opposing pieces 80, 80 that face the upper wall 60 and the lower wall 61 of the door wheel rail 6, and a pair of connecting pieces 81, 81 that connect both ends of the opposite ends of each opposing piece 80, 80 on the side opposite to the transverse wall, and is formed in a U-shaped cross section. Also, as shown in FIGS. 6 and 7, an opening window 82 is formed between the pair of connecting pieces 81, 81.

[0053] Also, as shown in FIGS. 6 and 7, the reinforcing fitting 8 has a pair of upper and lower protruding pieces 83 that protrude parallel to each opposing piece 80 from between the connecting pieces 81, 81 at the opposite ends of each opposing piece 80 on the side opposite to the transverse wall. Further, as shown in FIGS. 6 and 7, insertion holes 80a, 80a are provided at positions facing each other on each opposing piece 80.

[0054] Further, as shown in FIG. 6, the reinforcing fitting 8 of the present embodiment is slid and inserted into the sill 6 from one axial end of the sill 6, and the opposing pieces 80, 80 and the protruding pieces 83, 83 are respectively inserted between the upper restricting portion 64 and the upper wall 60 and between the lower restricting portion 65 and the lower wall 61, and are fitted in the sill 6.

[0055] That is, the lower surfaces of the upper opposing piece 80 and the upper protruding piece 83 face the upper restricting portion 64, and the upper surfaces of the lower opposing piece 80 and the lower protruding piece 83 face the lower restricting portion 65.

[0056] Therefore, even if a force to move the reinforcing fitting 8 in the vertical direction or the depth direction acts, since the opposing pieces 80, 80 and the protruding pieces 83, 83 abut against the upper restricting portion 64 and the lower restricting portion 65 respectively, the movement of the reinforcing fitting 8 in the vertical direction or the depth direction is restricted. Thus, it is possible to prevent the reinforcing fitting 8 from tilting in the depth direction or rattling in the vertical direction within the sill 6.

[0057] And, as shown in FIG. 6, when the transverse wall 62 and the connecting piece 81 face each other in the depth direction and are fitted in the sill 6, the reinforcing fitting 8 of the present embodiment cooperates with the sill 6 to form a box shape and reinforce the C-shaped channel sill 6, so as to improve the strength of the portion of the sill 6 where the reinforcing fitting 8 is fitted.

[0058] Note that the reinforcing fitting 8 of the present embodiment is manufactured, for example, by bending a single metal plate into a U shape. Specifically, as shown in FIG. 8, a rectangular hole serving as the opening window 82 is formed in the center of a rectangular metal plate with its four corners notched, and circular holes serving as the insertion holes 80a are formed above and below the rectangular hole. Then, if the metal plate is bent and formed near the upper and lower ends of the rectangular hole, the U-shaped reinforcing fitting 8 shown in FIG. 7 can be obtained. Note that as shown in FIG. 8, since the rectangular hole is formed leaving the protruding piece 83 portion, it has an H shape, and when the metal plate is bent and formed, the protruding piece 83 is automatically formed. Therefore, in order to provide the protruding piece 83 on the reinforcing fitting 8, it is not necessary to separately cut notches on the upper and lower sides of the left and right ends of the rectangular hole after forming the rectangular hole in the metal plate.

[0059] Therefore, the reinforcing fitting 8 of the present embodiment can be easily manufactured only by punching and bending the entire metal plate by press working. However, the shape of the reinforcing fitting 8 is not limited to the U shape, and may be, for example, a square cross-section or a cylindrical shape.

[0060] Returning, as shown in FIG. 6, the reinforcing fitting 8 of the present embodiment is connected to the upper wall 60 of the door frame rail 6 together with the door wheel 5 by a connecting fitting 50 that connects the door wheel 5 to the door frame rail 6.

[0061] Specifically, the door wheel 5 of the present embodiment includes a pair of rollers 5a, 5a facing each other in the depth direction. Further, as shown in FIGS. 6 and 7, the connecting fitting 50 of the present embodiment has a holding body 51 having a pair of left and right shafts 51a, 51a that rotatably hold the pair of rollers 5a, 5a respectively, and a hole 51b penetrating in the vertical direction, a shaft body 52a inserted into the hole 51b, and a hook portion 52b provided at the upper end of the shaft body 52a, having a diameter larger than that of the hole 51b and hooked on the upper end of the holding body 51, and a protruding shaft 52 protruding downward from the holding body 51, a bolt shaft 54 having a diameter smaller than that of the shaft body 52a of the protruding shaft 52 and protruding from the lower end of the shaft body 52a, and a step portion 55 formed between the protruding shaft 52 and the bolt shaft 54. Further, the bolt shaft 54 has a screw portion 54a having a screw groove on the outer periphery, and a square prism portion 54b having a square cross section provided at the end of the screw portion 54a on the step portion 55 side and formed thinner than the screw portion 54a.

[0062] Also, as shown in FIG. 7, a bolt insertion hole 63 is formed in the upper wall 60 of the door wheel rail 6. This bolt insertion hole 63 has an insertion portion 63a having a diameter smaller than that of the protruding shaft 52 and through which the bolt shaft 54 can be inserted, and a rounded square regulation portion 63b formed continuously with the insertion portion 63a, having a width slightly wider than the width of the square prism portion 54b of the bolt shaft 54 and narrower than the diameter of the screw portion a, and capable of fitting the square prism portion 54b.

[0063] Next, the procedure for connecting the door wheel 5 and the reinforcing fitting 8 to the door wheel rail 6 will be described in detail. First, the reinforcing fitting 8 is inserted into the door wheel rail 6 from one end on the axial side of the door wheel rail 6, and the insertion hole 80a of the opposing piece 80 is opposed to the insertion portion 63a of the bolt insertion hole 63 of the upper wall 60. At this time, the reinforcing fitting 8 is inserted and fitted into the door wheel rail 6 such that the connecting piece 81 faces the anti-cross wall side of the door wheel rail 6.

[0064] Here, in the present embodiment, insertion holes 80a are respectively provided in the pair of opposing pieces 80, 80 of the reinforcing fitting 8. Therefore, no matter which opposing piece 80 faces the upper wall 60, the insertion hole 80a and the insertion portion 63a of the bolt insertion hole 63 can be opposed to each other. Thus, when fitting the reinforcing fitting 8 into the door wheel rail 6, even if the reinforcing fitting 8 is inserted upside down (vertically) into the door wheel rail 6, no misassembly will occur.

[0065] Next, the bolt shaft 54 of the connecting fitting 50 that rotatably holds the door wheel 5 is inserted into the insertion portion 63a of the bolt insertion hole 63 of the door wheel rail 6 and the insertion hole 80a of the reinforcing fitting 8. Then, the bolt shaft 54 is laterally moved toward the restricting portion 63b of the bolt insertion hole 63 so that the square column portion 54b of the bolt shaft 54 is fitted into the restricting portion 63b. In this way, when the square column portion 54b is fitted into the restricting portion 63b of the bolt insertion hole 63, the connecting fitting 50 becomes immovable in the vertical direction with respect to the door wheel rail 6 and is temporarily fixed to the door wheel rail 6.

[0066] Finally, as shown in FIG. 6, by screwing a nut 66 onto the screw portion 54a through the opening window 82 facing the bolt shaft 54, the upper wall 60 and the opposing piece 80 are clamped by the nut 66 and the stepped portion 55, and the door wheel 5 and the reinforcing fitting 8 are connected to the door wheel rail 6. In this way, in the present embodiment, since the reinforcing fitting 8 is connected to the upper wall 60 of the door wheel rail 6 together with the door wheel 5, there is no risk of the reinforcing fitting 8 falling off from inside the door wheel rail 6. Also, since the reinforcing fitting 8 is in close contact with the upper wall 60, the door wheel rail 6 can be reliably reinforced.

[0067] Note that since the width of the restricting portion 63b of the bolt insertion hole 63 is smaller than the diameter of the screw portion 54a, in the state where the square column portion 54b is fitted into the restricting portion 63b of the bolt insertion hole 63, the axial movement of the bolt shaft 54 is restricted. Further, since the width of the restricting portion 63b is set to be slightly wider than the width of the square column portion 54b, in the state where the square column portion 54b is fitted into the restricting portion 63b, the circumferential rotation of the bolt shaft 54 is restricted.

[0068] Therefore, in the present embodiment, with the prismatic portion 54b fitted into the restricting portion 63b of the bolt insertion hole 63 so that the axial movement and circumferential rotation of the bolt shaft 54 are restricted, the nut 66 can be screwed onto the threaded portion 54a of the bolt shaft 54. Thus, in the present embodiment, it is sufficient to rotate only the nut 66 without particularly gripping the connecting fitting 50 with a tool, so the nut 66 can be easily screwed onto the threaded portion 54a.

[0069] However, the means for restricting the axial movement and circumferential rotation of the bolt shaft 54 is not limited to the means described above. Note that the configurations of the prismatic portion 54b and the restricting portion 63b may be omitted.

[0070] Next, the lower rail 7 of the present embodiment will be described. As shown in FIG. 9, the lower rail 7 of the present embodiment is formed by arranging the rail having the same shape as the aforementioned shutter rail 6 upside down. Therefore, a detailed description of the configuration of the lower rail 7 is omitted, and the reference numerals of each part of the lower rail 7 will be described using the same reference numerals as those of each part of the shutter rail 6.

[0071] As shown in FIG. 2, the lower rail 7 of the present embodiment is connected to the lower part of the lower horizontal rail 3B, closes the gap between the lower horizontal rail 3B and the ground, and suppresses the intrusion of insects into the greenhouse H and the inflow and outflow of air inside and outside the greenhouse H through the gap between the lower horizontal rail 3B and the ground. And as shown in FIG. 9, the plate portion 61a as a fitting portion of the lower rail 7 is fitted into the fitting groove 36 formed in the lower part of the lower horizontal rail 3B, and the plate portion 61a is hooked by the fitting groove 36, so that the lower rail 7 is connected to the lower part of the lower horizontal rail 3B.

[0072] Note that the lower rail 7 may have a shape different from that of the shutter rail 6, but in the present embodiment, since the lower rail 7 is a common component with the shutter rail 6, the types of components constituting the door device 1 are reduced, and the manufacturing cost of the door device 1 can be reduced.

[0073] Next, a method for assembling the door device 1 of the present embodiment will be described in detail. The door device 1 of the present embodiment is assembled by a process of connecting a door wheel rail 6 to which a door wheel 5 is connected to the upper part of an upper horizontal rail 3A, a process of connecting a lower rail 7 to the lower part of a lower horizontal rail 3B, a process of bridging each of the horizontal rails 3A, 3B, 3C, the door wheel rail 6, and the lower rail 7 between a pair of vertical frames 2, 2, and a process of stretching a door film S on a door frame 4.

[0074] First, the process of connecting the door wheel rail 6 to the upper part of the upper horizontal rail 3A will be described. A plate portion 61a as a fitting portion provided on the door wheel rail 6 is inserted into a fitting groove 35 provided in the upper part of the upper horizontal rail 3A from the axial side end of the upper horizontal rail 3A, and the plate portion 61a is fitted into the fitting groove 35. Then, since the plate portion 61a of the door wheel rail 6 is caught by the fitting groove 35 of the upper horizontal rail 3A, the door wheel rail 6 is connected to the upper part of the upper horizontal rail 3A. As described above, since the upper horizontal rail 3A of the present embodiment has a line-symmetric shape with the center in the vertical direction as the axis of symmetry, it is also possible to invert the upper and lower parts of the upper horizontal rail 3A shown in FIG. 6 and fit the plate portion 61a as a fitting portion into the fitting groove 36. Therefore, in the present embodiment, it is difficult to make a mistake in assembling the upper horizontal rail 3A.

[0075] In addition, a pair of ribs 30b, 30b are formed on a flat portion 30a constituting the bottom of the fitting groove 35. Therefore, when the plate portion 61a is inserted into the fitting groove 35, the plate portion 61a contacts the flat portion 30a via the ribs 30b, 30b. Therefore, compared with the case where the plate portion 61a of the door wheel rail 6 is in direct contact with the flat portion 30a, the contact area becomes smaller, so that the plate portion 61a of the door wheel rail 6 can be smoothly inserted into the fitting groove 35.

[0076] In addition, as shown in FIG. 6, the ribs 30b, 30b are arranged at positions where they respectively contact the plate portion 61a at equal positions from the center in the depth direction of the door frame 4 of the plate portion 61a. Therefore, when the plate portion 61a is slid and inserted into the fitting groove 35, the plate portion 61a is less likely to tilt with respect to the bottom of the fitting groove 35 and can be inserted more smoothly. Note that if one or more ribs 30b are provided, the plate portion 61a can be smoothly inserted into the fitting groove 35, but the number of ribs provided can be arbitrarily changed. However, the ribs 30b, 30b may be omitted.

[0077] Further, in the present embodiment, the plate portion 61a provided on the door wheel rail 6 is inserted and fitted into the fitting groove 35 from the axial side end of the upper horizontal rail 3A. However, when the upper horizontal rail 3A or the door wheel rail 6 can be elastically deformed, the opening of the fitting groove 35 may be expanded to fit the plate portion 61a into the fitting groove 35, or the plate portion 61a may be elastically deformed and fitted into the fitting groove 35 through the opening of the fitting groove 35.

[0078] Note that the connection method between the door wheel rail 6 and the upper horizontal rail 3A is not limited to the above method. For example, the door wheel rail 6 and the upper horizontal rail 3A may be connected by a connecting fitting such as a screw. However, in the present embodiment, since the door wheel rail 6 can be connected to the upper horizontal rail 3A only by inserting and fitting the plate portion 61a of the door wheel rail 6 into the fitting groove 35 of the upper horizontal rail 3A, the connection work becomes easier compared to the case of connecting using a connecting fitting such as a screw. Further, in the connection method between the door wheel rail 6 and the upper horizontal rail 3A of the present embodiment, since a connecting fitting such as a screw is not required, the cost can also be reduced.

[0079] Furthermore, in the present embodiment, the upper horizontal rail 3A and the door wheel rail 6 are separate members that can be separated. Therefore, the lower horizontal rail 3B and the intermediate horizontal rail 3C that do not need to be connected to the door wheel 5 can also be made of common parts with the upper horizontal rail 3A. As a result, the types of parts constituting the door device 1 can be reduced, and the manufacturing cost of the door device 1 can be reduced.

[0080] Also, as described above, since the lower rail 7 of the present embodiment is formed by arranging a rail having the same shape as the door wheel rail 6 upside down, the process of connecting the lower rail 7 to the lower part of the lower horizontal rail 3B is the same as the process of connecting the door wheel rail 6 to the upper part of the upper horizontal rail 3A.

[0081] Next, the process of bridging each horizontal bar 3A, 3B, 3C, the door wheel bar 6, and the lower bar 7 between a pair of vertical frames 2, 2 will be described in detail. As shown in FIG. 10, small holes 20b are respectively provided at positions on the inner side surface 20 of the vertical frame 2 where the upper horizontal bar 3A and the door wheel bar 6 are connected, and large holes 21b having a diameter larger than that of each small hole 20b are respectively provided at positions on the outer side surface 21 of the vertical frame 2 facing each small hole 20b.

[0082] Then, as shown in FIG. 10, with the first socket 37 of the upper horizontal bar 3A and the second socket 67 of the door wheel bar 6 facing each small hole 20b of the vertical frame 2, connecting screws B are respectively inserted into each small hole 20b, the first socket 37, and the second socket 67 through each large hole 21b and screwed in to connect one end of one vertical frame 2, the upper horizontal bar 3A, and the door wheel bar 6.

[0083] Here, a pair of positioning protrusions 20a, 20a protruding along the axial direction of the vertical frame 2 are provided on the inner side surface 20 of the vertical frame 2. Therefore, in the present embodiment, when one end of the upper horizontal bar 3A and the door wheel bar 6 is fitted between the pair of positioning protrusions 20a, 20a, it is only necessary to align in the vertical direction when facing the first socket 37, the second socket 67, and each small hole 20b, so the alignment becomes easy. However, the positioning protrusions 20a, 20a may be omitted.

[0084] Further, as shown in FIG. 10, the connecting screw B of the present embodiment includes a columnar screw portion B1 and a head portion B2 provided at the base end of the screw portion B1 and having a diameter smaller than that of the large hole 21b and larger than that of the small hole 20b. The screw portion B1 is composed of a screw shaft B1a on the base end side having a screw groove formed on the outer periphery and a positioning shaft B1b on the tip end side where no screw groove is formed.

[0085] Therefore, with the positioning shaft B1b inserted into the small hole 20b and the first socket 37 or the second socket 67 to position the connecting screw B, the screw shaft B1a can be screwed into the small hole 20b and the first socket 37 or the second socket 67. Thus, in the present embodiment, the connecting screw B can be easily screwed into the small hole 20b and the first socket 37 or the second socket 67.

[0086] Then, when the connecting screw B is screwed into and engaged with the small hole 20b, the first socket 37, and the second socket 67, the inner surface portion 20 of the vertical frame 2 is clamped between the head B2 and the upper horizontal rail 3A. Therefore, one end of the vertical frame 2, the upper horizontal rail 3A, and the door wheel rail 6 are connected. Thereafter, the cap C shown in FIG. 10 is attached to the large hole 21b to close the large hole 21b, preventing rainwater, sand, etc. from entering the vertical frame 2.

[0087] Also, although not shown, small holes 20b are respectively provided at positions where the lower horizontal rail 3B, the lower rail 7, and the intermediate horizontal rail 3C are connected to the inner surface portion 20 of the vertical frame 2, and large holes 21b are respectively provided at positions facing the small holes 20b on the outer surface portion 21 of the vertical frame 2.

[0088] Then, one end of the lower horizontal rail 3B, the lower rail 7, and the intermediate horizontal rail 3C is connected to one vertical frame 2 in the same procedure as connecting the upper horizontal rail 3A and the door wheel rail 6 described above.

[0089] Thereafter, the other ends of the upper horizontal rail 3A, the door wheel rail 6, the lower horizontal rail 3B, the lower rail 7, and the intermediate horizontal rail 3C are connected to the other vertical frame 2 in the same procedure as connecting the upper horizontal rail 3A and the door wheel rail 6 described above. As a result, the horizontal rails 3A, 3B, 3C, the door wheel rail 6, and the lower rail 7 are spanned between the pair of vertical frames 2, 2.

[0090] In the present embodiment, the door frame 4 is assembled such that the fixing grooves 40A of the vertical frames 2 and the fixing grooves 40B of the horizontal rails 3A, 3B, 3C face the outdoor side. However, the door frame 4 may be assembled by turning the vertical frames 2 and the horizontal rails 3A, 3B, 3C over so that the convex portions 23c of the vertical frames 2 and the convex portions 33a of the horizontal rails 3A, 3B, 3C face the outdoor side.

[0091] Next, the process of stretching the door film S on the door frame 4 will be described in detail. First, the case where the door film S to be stretched on the door frame 4 is the soft film Sa will be described in detail.

[0092] When stretching the soft film Sa on the door frame 4, the door frame 4 is assembled so that the first fixing portion 40 composed of the fixing groove 40A of the vertical frame 2 and the fixing grooves 40B of the horizontal bars 3A, 3B, and 3C faces the outdoor side. That is, when looking at the door frame 4 from the outdoor side, the first fixing portion 40 of the present embodiment is composed of fixing grooves 40A and 40B along a rectangular large frame composed of a pair of vertical frames 2, 2, an upper horizontal bar 3A, and a lower horizontal bar 3B, and fixing grooves 40B along three intermediate horizontal bars 3C spanned in the horizontal direction with respect to the large frame. It is composed of a ladder-shaped fixing groove formed by four vertically arranged rectangular small frames surrounded by the large frame.

[0093] Then, as shown in FIG. 3, with the soft film Sa inserted into each of the fixing grooves 40A and 40B, an elastic member SP composed of a corrugated spring is inserted from above the soft film Sa into each of the fixing grooves 40A and 40B. Thereby, the soft film Sa is fixed to the door frame 4 by the elastic force of the elastic member SP.

[0094] Also, in the present embodiment, the soft film Sa is fixed to all the fixing grooves 40A and 40B provided in the pair of vertical frames 2, 2 and each of the horizontal bars 3A, 3B, and 3C. However, it is not necessary to fix the soft film Sa to the fixing groove 40B of the intermediate horizontal bar 3C. However, in the present embodiment, the inside of the door frame 4 is divided into four rectangular small frames vertically by three intermediate horizontal bars 3C, and the four sides of the soft film Sa are fixed to the fixing grooves 40A and 40B along the large frame surrounding the small frame. Therefore, when the soft film Sa is also fixed to the intermediate horizontal bar 3C, it is difficult for the soft film Sa to flutter even if it is fanned by the wind.

[0095] Note that the configuration of the first fixing portion 40 is not limited to the fixing grooves 40A and 40B whose opening width is narrower than the width of the bottom as long as a soft film can be fixed. Further, the elastic member SP is not limited to a corrugated spring, and may be, for example, rubber or a coil spring.

[0096] Next, the case where the door film S extended on the door frame 4 is a hard film Sb will be described in detail. When the hard film Sb is extended on the door frame 4, the door frame 4 is assembled so that the second fixing portion 41 composed of the convex portions 23c of the vertical frames 2 and the convex portions 33a of the horizontal bars 3A, 3B, and 3C faces the outdoor side. That is, when the door frame 4 is viewed from the outdoor side, the second fixing portion 41 of the present embodiment is composed of convex portions 23c and 33a along a rectangular large frame composed of a pair of vertical frames 2 and 2, an upper horizontal bar 3A, and a lower horizontal bar 3B, and convex portions 33a along three intermediate horizontal bars 3C spanned in the lateral direction with respect to the large frame. It is composed of a ladder-shaped convex portion formed by four vertically arranged rectangular small frames surrounded by the large frame.

[0097] Then, as shown in FIG. 4, with the hard film Sb covering the convex portions 23c and 33a, a pressing member 70 is overlapped on the convex portions 23c and 33a from above the hard film Sb, and a screw 71 is screwed into the convex portions 23c and 33a while passing through the pressing member 70 and the hard film Sb and aiming at the guide grooves 23d and 33d. Then, the hard film Sb is sandwiched between the pressing member 70 and the convex portions 23c and 33a and fixed. At this time, since the screw 71 is screwed into the convex portions 23c and 33a while the tip is guided by the guide grooves 23d and 33d, it is easy to screw in the screw 71.

[0098] In addition, in the present embodiment, the hard film Sb is fixed to all the convex portions 23c and 33a provided on the pair of vertical frames 2 and 2 and each of the horizontal bars 3A, 3B, and 3C. However, it is not necessary to fix the hard film Sb to the convex portion 33a of the intermediate horizontal bar 3C. However, in the present embodiment, the inside of the door frame 4 is divided into four rectangular small frames vertically by three intermediate horizontal bars 3C, and the four sides of the hard film Sb are fixed to the convex portions 23c and 33a along the large frame surrounding the small frame. Therefore, if the hard film Sb is also fixed to the intermediate horizontal bar 3C, the hard film Sb is less likely to flutter even if it is fanned by the wind.

[0099] Note that the configuration of the second fixing portion 41 is not limited to the convex portions 23c and 33a as long as the hard film Sb can be fixed.

[0100] As described above, in the door device 1 of the present embodiment, if the door frame 4 is assembled so that the first fixing portion 40 faces the outdoor side, the soft film Sa can be extended on the door frame 4, and if the door frame 4 is assembled so that the second fixing portion 41 faces the outdoor side, the hard film Sb can be extended on the door frame 4. However, the above-described method of assembling the door device 1 is an example and is not limited to the above-described assembling method.

[0101] As described above, the door device 1 of the present embodiment is provided slidably in the width direction of the vinyl house H in an opening O formed by a portal frame W provided in the vinyl house H as a simple structure, and opens and closes the opening O. It has a door frame 4 having a pair of left and right vertical frames 2 and 2 and a plurality of horizontal bars 3A, 3B, and 3C spanned between the vertical frames 2 and 2, and a door wheel 5 that runs on the upper frame of the opening O is connected to a door wheel bar 6 that is connected to the upper horizontal bar 3A disposed at the uppermost position among the horizontal bars 3A, 3B, and 3C. The door frame 4 has a first fixing portion 40 provided at one end in the depth direction and capable of fixing the soft film Sa, and a second fixing portion 41 provided at the other end in the depth direction and capable of fixing the hard film Sb.

[0102] According to this configuration, a first fixing portion 40 capable of fixing the soft film Sa is provided at one end side in the depth direction of the door frame 4, and a second fixing portion 41 capable of fixing the hard film Sb is provided at the other end side. Therefore, either the soft film Sa or the hard film Sb can be selected as the desired film for the door film S and extended onto the door frame 4.

[0103] Furthermore, in this embodiment, since the first fixing portion 40 is provided at one end side in the depth direction of the door frame 4 and the second fixing portion 41 is provided at the other end side in the depth direction of the door frame 4, when the first fixing portion 40 and the second fixing portion 41 are arranged in parallel on the outdoor sides of the vertical frames 2 and the horizontal cross members 3A, 3B, 3C of the door frame 4 respectively, the widths of the vertical frames 2 and the respective horizontal cross members 3A, 3B, 3C constituting the door frame 4 are shorter. Therefore, an increase in the weight of the door frame 4 can be suppressed.

[0104] Also, in this embodiment, since the upper horizontal cross member 3A and the door wheel cross member 6 are configured as separate members, each of the horizontal cross members 3A, 3B, 3C can be a common component. Therefore, the types of components constituting the door device 1 can be reduced, and thus the manufacturing cost of the door device 1 can be reduced.

[0105] In this embodiment, when the soft film Sa is extended on the door frame 4, the door frame 4 is arranged such that the first fixing portion 40 faces the outdoor side, and when the hard film Sb is extended on the door frame 4, the door frame 4 is arranged such that the second fixing portion 41 faces the outdoor side. However, the door film S may be fixed to the first fixing portion 40 or the second fixing portion 41 facing the indoor side.

[0106] Also, in the door device 1 of this embodiment, the upper horizontal cross member 3A has a fitting groove 35 along the width direction of the door frame 4 with an opening width narrower than the width of the bottom, and the door wheel cross member 6 has a plate portion 61a as a fitting portion wider than the opening width of the fitting groove 35 and capable of being hooked and fitted into the fitting groove 35.

[0107] According to this configuration, by simply fitting the plate portion 61a of the door wheel rail 6 into the fitting groove 35 of the upper horizontal rail 3A, the plate portion 61a is caught in the opening of the fitting groove 35, and the upper horizontal rail 3A and the door wheel rail 6 can be connected, so that the assembly work of the door device 1 becomes easy. In addition, compared with the case where the upper horizontal rail 3A and the door wheel rail 6 are connected by a connecting fitting such as a screw, the connecting fitting is not required, so the cost can be reduced.

[0108] In addition, in the present embodiment, the flat plate portion 61a is used as the fitting portion, but the shape of the fitting portion is not particularly limited as long as it is wider than the opening width of the fitting groove 35 and can be caught in the fitting groove 35.

[0109] Also, in the present embodiment, the fitting groove 35 is provided in the upper horizontal rail 3A, and the fitting portion that can be fitted into the fitting groove 35 is provided in the door wheel rail 6. However, a fitting groove may be provided in the door wheel rail 6 and a fitting portion may be provided in the upper horizontal rail 3A.

[0110] Further, in the door device 1 of the present embodiment, the plate portion 61a as the fitting portion can be slidably inserted into the fitting groove 35, and a rib 30b is provided at the bottom of the fitting groove 35 along the width direction of the door frame 4 and abuts against the plate portion 61a.

[0111] According to this configuration, when the plate portion 61a is slid and inserted into the fitting groove 35, the contact area becomes smaller compared to the case where the plate portion 61a and the bottom of the fitting groove 35 are in direct contact, so that the plate portion 61a can be smoothly inserted into the fitting groove 35. Note that as long as one or more ribs 30b are provided, the plate portion 61a can be smoothly inserted into the fitting groove 35, but the number of installations can be arbitrarily changed.

[0112] In addition, in the door device 1 of the present embodiment, the door wheel rail 6 has an upper wall 60 and a lower wall 61 that are parallel to the width direction of the door frame 4 and face each other in the vertical direction, and a transverse wall 62 that connects one end of the upper wall 60 and the lower wall 61 on the depth direction side. Further, the door device 1 includes a reinforcing metal fitting 8 that is fitted inside the door wheel rail 6 and has an axial length shorter than that of the door wheel rail 6. The reinforcing metal fitting 8 has a pair of opposing pieces 80, 80 that face the upper wall 60 and the lower wall 61, and a connecting piece 81 that connects the ends of the opposing pieces 80, 80 on the side opposite to the transverse wall.

[0113] According to this configuration, the portion of the door wheel rail 6 where the reinforcing metal fitting 8 is fitted forms a box shape in cooperation with the reinforcing metal fitting 8 and the door wheel rail 6, so the strength is improved. In addition, since the reinforcing metal fitting 8 has an axial length shorter than that of the door wheel rail 6, only the portion of the door wheel rail 6 that needs to be reinforced can be partially reinforced. Therefore, compared with the case of increasing the wall thickness of the entire door wheel rail 6 to improve the strength of the door wheel rail 6, the material can be reduced.

[0114] In addition, the door device 1 of the present embodiment includes a connecting metal fitting 50 that connects the door wheel 5 and the door wheel rail 6. The connecting metal fitting 50 has a holding body 51 that rotatably holds the door wheel 5, a protruding shaft 52 that protrudes from the holding body 51, a bolt shaft 54 that has a smaller diameter than the protruding shaft 52 and protrudes from the tip of the protruding shaft 52 and has a screw groove on the outer periphery, and a stepped portion 55 formed between the protruding shaft 52 and the bolt shaft 54. A bolt insertion hole 63 that has a smaller diameter than the protruding shaft 52 and into which the bolt shaft 54 can be inserted is provided in the upper wall 60 of the door wheel rail 6. An insertion hole 80a that can face the bolt insertion hole 63 is provided in the opposing piece 80 that faces the upper wall 60. The opposing piece 80 and the upper wall 60 are sandwiched between a nut 66 that is screwed onto the bolt shaft 54 inserted into the bolt insertion hole 63 and the insertion hole 80a from the upper wall 60 side and the stepped portion 55.

[0115] Here, when the door device 1 is fanned by the wind, the door device 1 sways starting from the connecting portion between the door wheel 5 and the door wheel rail 6, so a large load is applied to the connecting portion. According to this configuration, since the reinforcing fitting 8 is connected to the upper wall 60 of the door wheel rail 6 together with the door wheel 5 by the connecting fitting 50, only the portion of the door wheel rail 6 where the most load is applied can be effectively reinforced. Further, in the present embodiment, since the reinforcing fitting 8 is connected to the upper wall 60 by the connecting fitting 50, there is no fear that the reinforcing fitting 8 will fall off from inside the door wheel rail 6. Also, since the reinforcing fitting 8 is in close contact with the upper wall 60, the door wheel rail 6 can be reliably reinforced.

[0116] Also, in the door device 1 of the present embodiment, the reinforcing fitting 8 has an opening window 82 that faces the bolt shaft 54 in the radial direction of the bolt shaft 54 with respect to the bolt shaft 54 inserted into the bolt insertion hole 63 and the insertion hole 80a.

[0117] According to this configuration, since the operation of screwing the nut 66 onto the bolt shaft 54 can be performed through the opening window 82, the operation of connecting the door wheel 5 and the reinforcing fitting 8 to the door wheel rail 6 becomes easy. In the present embodiment, both ends of the opposite side ends of the pair of opposing pieces 80, 80 on the side of the anti-cross wall are connected by a pair of connecting pieces 81, 81, and the space between the pair of connecting pieces 81, 81 is used as the opening window 82. However, both ends of the opposite side ends of the pair of opposing pieces 80, 80 on the side of the anti-cross wall may be connected by a single connecting piece, and a hole that faces the bolt shaft 54 in the radial direction of the bolt shaft 54 may be provided in the connecting piece, and the hole may be used as the opening window 82. Note that the opening window 82 may be omitted. When the opening window 82 is not provided in the reinforcing fitting 8, the nut 66 may be inserted into the reinforcing fitting 8 from the axial side end of the reinforcing fitting 8, and the nut 66 may be screwed onto the bolt shaft 54.

[0118] In the present embodiment, the reinforcing fitting 8 is arranged at the connecting portion of the door wheel rail 6 with the door wheel 5 to reinforce the connecting portion of the door wheel rail 6. However, the reinforcing fitting 8 may be arranged to reinforce portions other than the connecting portion. Also, the reinforcing fitting 8 does not necessarily have to be fixed to the door wheel rail 6.

[0119] In addition, in the door device 1 of the present embodiment, the reinforcing fitting 8 has a protruding piece 83 that protrudes from the end on the opposite side wall of each opposing piece 80 in parallel to the opposing piece 80. The door wheel rail 6 has a pair of upper and lower restricting portions 64 and 65 that face each opposing piece 80 and each protruding piece 83 and restrict the movement of the reinforcing fitting 8 in the vertical direction and the depth direction.

[0120] According to this configuration, since the movement of the reinforcing fitting 8 in the vertical direction and the depth direction is restricted by the restricting portions 64 and 65, it is possible to prevent the reinforcing fitting 8 from tilting in the depth direction or rattling in the vertical direction within the door wheel rail 6. Further, in the present embodiment, since the reinforcing fitting 8 does not shift in the depth direction, it becomes easy to align the insertion hole 80a of the reinforcing fitting 8 with the bolt insertion hole 63 provided in the upper wall 60.

[0121] However, the configuration of the protruding piece 83 of the reinforcing fitting and the restricting portions 64 and 65 of the door wheel rail 6 may be omitted. In that case, instead of inserting the reinforcing fitting 8 into the door wheel rail 6 from the axial end side of the door wheel rail 6, the reinforcing fitting 8 can be fitted into the door wheel rail 6 through an opening formed on the opposite side wall side of the door wheel rail 6.

[0122] The reinforcing fitting 8 of the present embodiment is fitted into the door wheel rail 6 having an upper wall 60 and a lower wall 61 that are parallel to the width direction of the door frame 4 and face each other in the vertical direction, and a transverse wall 62 that connects one end in the depth direction of the upper wall 60 and the lower wall 61 to reinforce the door wheel rail 6. Therefore, the reinforcing fitting 8 can be attached to any door device as long as it includes the above-described door wheel rail 6. That is, the door device to which the reinforcing fitting 8 can be used is not limited to the door device 1 of the present embodiment.

[0123] In addition, in the door device 1 of the present embodiment, as shown in FIGS. 1, 11, and 12, a pair of vertical columns 11, 11 that form a portal frame W that forms the opening O of the greenhouse H, and a horizontal column 12 that is spanned between the pair of vertical columns 11, 11 and forms the upper frame of the opening O are each connected to a brush holding member 91 that holds a brush 90 that fills the gap between the frame W and the door frame 4.

[0124] Specifically, as shown in FIGS. 11 and 12, the brush holding member 91 of the present embodiment includes a rectangular flat plate-shaped fixing plate 91a extending along the axial direction of the vertical support column 11 or the horizontal support column 12, and a pair of holding pieces 91b, 91b having an L-shaped cross section that stand up from one end and the center in the width direction of the fixing plate 91a and extend in a direction approaching each other. A holding groove (not shown) is formed by the pair of holding pieces 91b, 91b and the fixing plate 91a. Further, a guide groove 91d is formed in a fixing portion 91c that is a portion from the other end to the center in the width direction of the fixing plate 91a along the axial direction.

[0125] Further, as shown in FIGS. 11 and 12, the brush 90 of the present embodiment is inserted into the holding groove of the brush holding member 91 and is planted and fixed along the central line in the axial direction of a rectangular flat plate-shaped holding plate 92 having a width wider than the opening width of the holding groove (the width between the tips of the holding pieces 91b, 91b).

[0126] Then, with the holding plate 92 inserted into the holding groove of the brush holding member 91 and the brush 90 protruding from the opening of the holding groove, the holding pieces 91b, 91b are bent toward the fixing plate 91a side, so that the holding plate 92 is sandwiched between the holding pieces 91b, 91b and the fixing plate 91a. In this way, the brush 90 of the present embodiment is held by the brush holding member 91.

[0127] Also, as shown in FIGS. 11 and 12, the brush holding member 91 of the present embodiment is connected to the vertical support column 11 or the horizontal support column 12 by screwing a fixing screw 93 along the guide groove 91d with the fixing portion 91c facing the indoor side of the vertical support column 11 or the horizontal support column 12. Note that the brush holding member 91 may be connected to the vertical support column 11 or the horizontal support column 12 by a method other than screwing the fixing screw 93.

[0128] And, as shown in FIG. 12, the brush 90 held by the brush holding member 91 connected to the vertical support column 11 is provided at a position where it abuts against and bends against the vertical stile 2 when the door device 1 is closed. Therefore, in a state where the door device 1 is closed, the gap between the vertical support column 11 and the vertical stile 2 is filled and blocked by the brush 90.

[0129] Also, although not shown, the brush 90 held by the brush holding member 91 connected to the horizontal support column 12 is always provided at a position where it contacts and bends against the upper horizontal rail 3A of the door device 1. Therefore, the gap between the horizontal support column 12 and the upper horizontal rail 3A is always filled and blocked by the brush 90.

[0130] Thus, in the door device 1 of the present embodiment, in the state where the door device 1 is closed, the gap between the frame W composed of the vertical support column 11 and the horizontal support column 12 of the vinyl house H and the door frame 4 is blocked by the brush 90 held by the brush holding members 91 respectively connected to the vertical support column 11 and the horizontal support column 12. Therefore, it is possible to prevent insects from entering the vinyl house H and suppress the temperature change inside the vinyl house H by suppressing the inflow and outflow of air through the gap.

[0131] Furthermore, since the brush 90 can be flexibly deformed, even if the door device 1 rattles in the depth direction and the size of the gap between the door frame 4 and the frame W changes, the gap can be filled and blocked by the brush 90.

[0132] Also, instead of the brush 90, it is conceivable to fill the gap between the frame W and the door frame 4 with rubber. However, since the door device 1 of the present embodiment is provided in the vinyl house H used outdoors, when the gap between the frame W and the door frame 4 is filled with rubber, the rubber is likely to deteriorate due to the influence of ultraviolet rays. On the other hand, since the brush 90 is less affected by ultraviolet rays than rubber, even when used for the door device 1 provided in the vinyl house H, it requires less replacement and is excellent in economy.

[0133] In the present embodiment, the brush holding members 91 are connected to both the vertical support column 11 and the horizontal support column 12. However, the brush holding member 91 may be connected to only one of the vertical support column 11 and the horizontal support column 12.

[0134] Also, the configuration of the brush holding member 91 of the present embodiment is an example and is not limited to the above-described configuration.

[0135] Although the preferred embodiments of the present invention have been described in detail above, it goes without saying that modifications, variations, and changes can be made without departing from the scope of the claims.

Description of Reference Numerals

[0136] 1 ··· Door device, 2 ··· Vertical frame, 3A ··· Upper horizontal rail, 3B ··· Lower horizontal rail, 3C ··· Intermediate horizontal rail, 4 ··· Door frame, 5 ··· Door wheel, 6 ··· Door wheel rail, 8 ··· Reinforcing fitting, 11 ··· Vertical support column, 12 ··· Horizontal support column, 30b, 31b ··· Rib, 35, 36 ··· Fitting groove, 40 ··· First fixing portion, 41 ··· Second fixing portion, 50 ··· Connecting fitting, 51 ··· Holding body, 52 ··· Protruding shaft, 54 ··· Bolt shaft, 55 ··· Step portion, 60 ··· Upper wall, 61 ··· Lower wall, 61a ··· Plate portion (fitting portion), 62 ··· Horizontal wall, 63 ··· Bolt insertion hole, 64, 65 ··· Regulation portion, 66 ··· Nut, 80 ··· Opposing piece, 80a ··· Insertion hole, 81 ··· Connecting piece, 82 ··· Opening window, 83 ··· Protruding piece, 90 ··· Brush, 91 ··· Brush holding member, H ··· Greenhouse (simple structure), O ··· Opening, Sa ··· Soft film, Sb ··· Hard film, W ··· Frame

Claims

1. In a door device that is provided in an opening formed by a portal frame provided in a simple structure and is slidable in the width direction of the simple structure to open and close the opening, a door frame having a pair of left and right vertical frames and a pair of upper and lower horizontal bars spanned between the vertical frames, a carriage bar to which a carriage running on the upper frame of the opening is connected and which is connected to the upper horizontal bar disposed above among the horizontal bars, the carriage bar being fitted with a reinforcing metal fitting that is shorter in width than the carriage bar, the carriage bar having an upper wall and a lower wall that are parallel to the width direction of the door frame and face each other in the vertical direction, and a transverse wall connecting one ends of the upper wall and the lower wall on the depth direction side, the reinforcing metal fitting having a pair of opposing pieces facing the upper wall and the lower wall, and a connecting piece connecting the ends of the opposing pieces on the side opposite to the transverse wall, the door device being characterized by the above.

2. The door device further includes a connecting metal fitting for connecting the carriage and the carriage bar, the connecting metal fitting having a holding body for rotatably holding the carriage, a protruding shaft protruding from the holding body, a bolt shaft having a smaller diameter than the protruding shaft and protruding from the tip of the protruding shaft and having a screw groove on the outer periphery, and a stepped portion formed between the protruding shaft and the bolt shaft, the upper wall being provided with a bolt insertion hole having a smaller diameter than the protruding shaft and into which the bolt shaft can be inserted, the opposing piece facing the upper wall being provided with an insertion hole that can face the bolt insertion hole, the opposing piece and the upper wall being clamped by a nut screwed onto the bolt shaft inserted into the bolt insertion hole and the insertion hole from the upper wall side and the stepped portion. The door device according to claim 1, characterized by the above.

3. The reinforcing metal fitting has an opening window facing the bolt shaft in the radial direction of the bolt shaft with respect to the bolt shaft inserted into the bolt insertion hole and the insertion hole. The door device according to claim 2, characterized by the above.

4. The reinforcing metal fitting has protruding pieces protruding parallel to the opposing pieces from the ends of the respective opposing pieces on the side opposite to the transverse wall, the carriage bar having a pair of upper and lower regulating portions facing the respective opposing pieces and the respective protruding pieces to regulate the movement of the reinforcing metal fitting in the vertical direction and the depth direction. The door device according to any one of claims 1 to 3, characterized by the above.

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