JP2020191789A - Sliding type door for greenhouse - Google Patents

Abstract

To provide a sliding type door of a greenhouse having a simple structure which can be executed for a sliding type door of a greenhouse which opens/closes in a double opening type by a simple structure, and in which only by opening/closing either right or left door, the other door opens/closes simultaneously and automatically.SOLUTION: A wire 8 is wound by a predetermined procedure to a pair of right and left end part rollers 1,2 arranged at both end parts of a base plate 9 and a pair of right and left central rollers 3,4 arranged at the central part of the base plate 9. An upper part of one door 30A is connected to the wire 8 wound to the left end part roller 1 and the left central roller 3, and an upper part of the other door 30B is connected to the wire 8 wound to the right end part roller 2 and the right central roller 4. The other door 30B(30A) opens simultaneously corresponding to an opening action of either one door 30A(30B), and the other door 30B(30A) closes simultaneously corresponding to a closing action of either one door 30A(30B).SELECTED DRAWING: Figure 1

Description

The present invention relates to a sliding door for a greenhouse, and further, a simple structure of a wire and a roller installed near the upper rail of the entrance / exit opening of the greenhouse as shown in FIG. It belongs to the technical field of sliding doors for greenhouses, in which the other door is automatically opened and closed at the same time according to the opening and closing of either the left or right side of the door.

As a sliding door conventionally implemented at the entrance / exit opening of a greenhouse, for example, there is the following Patent Document 1 developed by the present applicant. In the present invention, referring to the reference numerals of the same document 1, the upper side rail 3 has a grooved steel shape with a lip having a downward opening 9 in the basic shape of the cross section, and the upper surfaces 7a of the left and right lips 7 facing inward are formed. It is used as the running surface of the door roller, and the edge of the lip 7 on one side is folded back to the lower side of the lip to form a groove 6 in a gap between the lip 7 and the self-tap screw 8 into which the self-tap screw 8 can be screwed. A vertically downwardly curved hanging lower surface portion 11 is formed, a seat stopper 5 is attached to the upper rail 3 by screwing into the groove portion 6, and the double wheel 12 of the door 4 is a slide mounted on the upper surface 7a of the lip 7 so as to be travelable. It is a type door.

Further, as in Patent Document 2 below, a double door opening / closing device that can open and close a pair of left and right doors in synchronization with a small linear motor and that can easily adjust the slack of the tow wire is also known. In this double door opening / closing device, referring to the reference numerals of the same document 2, one end of the first tow wire 31 is connected to the mover 11 of the linear motor 6 and hung on the first pulley 8, and the other end is connected to the door 2b. .. One end of the second tow wire 32 is connected to the mover 6 and hung on the second pulley 9, and the other end is connected to the door 2b. When the door 2a is opened and closed by the linear motor 6, the door 2b is pulled in the direction opposite to that of the door 2a. Further, the connecting portion between the door 2b and the first towing wire 31 and the second towing wire 32 is set at the same position, and a connecting pin 16 whose fixed position with respect to the door 2b can be changed in the extension direction of the towing wire is provided to provide the first towing. The wire 31 and the second tow wire 32 are locked, and the position of the first pulley 8 or the second pulley 9 is adjustable in the longitudinal direction of the rail.

Japanese Patent No. 2764698 Japanese Unexamined Patent Publication No. 11-166366

According to the sliding door structure of Patent Document 1 described above, the double wheels 12 mounted on the lips 7 and 7 of the upper rail 3 travel in a well-balanced manner, which contributes to the stabilization of the traveling of the sliding door. In addition to increasing the utility value of the sliding door 4, the seat stopper 5 or 5'can be directly fixed to the upper rail 3, and the desired seat 19 or 20 can be stretched. However, the other door is not automatically opened and closed at the same time when either the left or right side of the sliding door for the greenhouse is opened or closed.

Further, in the double door opening / closing device of Patent Document 2, although the first traction wire 31 and the second traction wire 32 are formed in a loop shape having a simple structure via the mover 11 of the linear motor 6, the door 2a is opened / closed. A linear motor 6 to be driven is required, and the cost is inevitably high in carrying out the linear motor 6. Moreover, a long bracket 13 for connecting the other door 2b to the first tow wire 31 is required, which increases the number of parts and causes problems such as poor opening / closing stability of the door.

Therefore, the present invention has been made to solve the above-mentioned problems, and the purpose of the present invention is to provide a sliding door that opens and closes with a double door, which is applied to the entrance / exit opening of a greenhouse, and the minimum necessary amount of endless wires and rollers. To provide an easy-to-use sliding door for greenhouses that can be carried out inexpensively with the structure of the above, and the worker can open and close one of the left and right doors at the same time automatically and stably. Is.

As a means for solving the above problems, the sliding door for a greenhouse according to the first aspect of the invention has an endless shape on a base plate 9 installed near the upper rail 12 of the entrance / exit opening 11 of the greenhouse 10. The wire 8 is provided via a plurality of rollers 1 to 4, and the upper portions 31 of the left and right sliding doors 30A and 30B having the door roller 40 in the upper rail 12 or the lower rail 13 are connected to the wire 8. A sliding door for a greenhouse in which the other door 30B or 30A is opened and closed at the same time according to the opening and closing of either the left or right door 30A or 30B.
The rollers 1 to 4 consist of a pair of left and right end rollers 1 and 2 arranged at both ends of the base plate 9, and a pair of left and right center rollers 3 and 4 arranged at the center of the base plate 9. As it becomes
The wire 8 is wound around the left end roller 1 from below to above, heads inward, is hung above the left center roller 3, and then hung below the adjacent right center roller 4. Then, it is wound outward from the bottom to the top on the right end roller 2 and then inward, and after being hung on the center roller 4 on the right side, the adjacent center roller 3 on the left side. It is formed endlessly by being hung on the lower side of the wire 8 and connected to the wire 8 before being wound on the left end roller 1.
The upper 31 of the one door 30A is connected to the lower wire 8 between the left end roller 1 and the left center roller 3, and the lower part between the right end roller 2 and the right center roller 4. The upper portion 31 of the other door 30B is connected to the wire 8, and the other door 30B or 30A opens at the same time according to the opening operation of the left or right door 30A or 30B, and the left or right door 30A is opened at the same time. Alternatively, the other door 30B or 30A is closed at the same time according to the closing operation of the 30B.

The invention according to claim 2 is an upper part of the one door 30A on an upper wire 8 between the left end roller 1 and the left central roller 3 of the sliding door for a greenhouse according to claim 1. 31 is connected, and the upper portion 31 of the other door 30B is connected to the upper wire 8 between the right end roller 2 and the right center roller 4, and the left or right door 30A or 30B is connected. The other door 30B or 30A opens at the same time according to the opening operation, and the other door 30B or 30A closes at the same time according to the closing operation of either the left or right door 30A or 30B.

In the invention according to claim 3, one of the left and right central rollers 3 or 4 of the sliding door for a greenhouse according to claim 1 or 2 is separated from the other central roller 4 or 3 in the depth direction. The wires 8 intersecting between the left and right central rollers 3 and 4 are not in contact with each other.

In the invention described in claim 4, the central roller 3 or 4 on either the left or right side of the sliding door for a greenhouse according to any one of claims 1 to 3 has a depth of the other central roller 4 or It is characterized in that the groove portion 16a formed longer than 3 and for hanging the wire 8 is provided at a depth direction from the groove portion 16a of the other central roller 4 or 3.

The invention according to claim 5 is attached to the inner end of each upper portion 31 of the left and right sliding doors 30 (30A, 30B) of the sliding door for a greenhouse according to any one of claims 1 to 4. , The L-shaped wire fixing metal fitting 80 is installed, and the wire 8 is connected and fixed to the wire fixing metal fitting 80.

In the invention described in claim 6, bearings are loaded in the door rollers 40 of the left and right sliding doors 30 (30A, 30B) of the sliding door for a greenhouse according to any one of claims 1 to 5. It is characterized by being done.

In the invention described in claim 7, the base plate 9 of the sliding door for a greenhouse according to any one of claims 1 to 6 is placed in a greenhouse via a U bolt 91 on the inner surface of the upper rail 12. It is characterized in that it is attached to 10 column pipes 14.

In the invention according to claim 8, the rollers 1 to 4 and the wire 8 of the sliding door for a greenhouse according to any one of claims 1 to 7 are directly installed on an upper rail 12 without a base plate 9. It is characterized by being done.

The invention according to claim 9 is to pull the second wire 51 into the upper portion 31 of either the left or right door 30A or 30B of the sliding door for a greenhouse according to any one of claims 1 to 8. When the type mainspring unit 50 is installed, the tip 51a of the second wire 51 is connected to the upper rail 12 or the base plate 9, and one of the left and right doors 30A or 30B is opened, the door 30A or 30B is opened. The second wire 51 of the mainspring unit 50 is pulled in, and both the left and right doors 30A and 30B are closed at the same time.

The sliding door for greenhouses of the present invention can be carried out inexpensively near the upper rail of the entrance / exit opening of the greenhouse with a simple structure of endless wires and the minimum necessary rollers, and the worker can open and close either the left or right door. The other door automatically and stably opens and closes at the same time, making it easy to use and allowing you to freely pass through the inside and outside of the greenhouse as needed, contributing to improved work efficiency.

(A) is an enlarged plan view and an enlarged front view of the code A portion of (B), (B) is an explanatory view showing the installation procedure of the roller and the wire from the front, and (C) is the wire and the fixing bracket of (B). It is explanatory drawing which showed the movement of. It is a partial notch front view which showed the sliding door. (A) is a side view showing a sliding door, and (B) is an enlarged view of a part of reference numeral B of (A). It is a partial notch plan view which showed the mounting state to the upper rail of a base plate. It is a perspective view (A), a side view (B), and a front view (C) which showed the roller. It is a perspective view which showed the assembly procedure of different rollers. (A) is a simplified front view of the endless wire, (B) is an enlarged front view of the caulked state of the A portion in (A), and (C) is a back view of (B). It is a partially cutaway perspective view which showed the connection state of a sliding door to a wire from below. It is a perspective view which showed the wire fixing metal fitting. It is a perspective view which showed the connection state of a wire fixing metal fitting and a wire from the bottom. It is a side view of the wire fixing metal fitting of FIG. It is a front view which showed the internal structure of the wire and the roller of the sliding door installed in a greenhouse. It is a front view which showed the implementation situation of the mainspring unit in this sliding door.

The sliding door for a greenhouse of the present embodiment will be described below with reference to the drawings.
In this sliding door, an endless wire 8 is installed via a plurality of rollers 1 to 4 on a base plate 9 installed near the upper rail 12 of the entrance / exit opening 11 of the greenhouse 10 as shown in FIG. (FIG. 1), each upper portion 31 of the left and right sliding doors 30 (30A, 30B) provided with the door roller 40 in the lower rail 13 is connected to the wire 8 (FIG. 8). Then, the other door 30B or 30A is opened and closed at the same time according to the opening and closing of either the left or right door 30A or 30B, and this is carried out in order to pass through the inside and outside of the greenhouse 10 to facilitate work. Hereinafter, the left door is indicated by reference numeral 30A, and the right side door is indicated by reference numeral 30B.

It is preferable that the door roller 40 of the sliding doors 30 (30A, 30B) connected to the wire 8 is loaded with bearings. This is to smoothly open and close the sliding doors 30 (30A, 30B).
The left and right sliding doors 30 (30A, 30B) in the present embodiment are provided with a door roller 40 in the lower rail 13, and a protruding metal fitting 31a (30A, 30B) for preventing the door 30 (30A, 30B) from falling out in the upper rail 13. An example provided with FIG. 3B) will be described, but the same applies to a form in which the door roller 40 is provided in the upper rail 12 (not shown). Further, in FIG. 1A, reference numeral 33 indicates a handle provided at each inner end of the sliding door 30 (30A, 30B).

The base plate 9 will be described. As shown in FIG. 2, the base plate 9 is a horizontally long plate body, and depending on the aluminum product, the total width is about 2700 mm, the height is about 130 mm, and the plate thickness is about 3 mm. Rollers 1 to 4, which will be described later, are attached to the predetermined positions of the base plate 9.
A pair of small holes 90, 90 adjacent to each other are bored in the base plate 9 in a small oval shape in a horizontally long shape at four places at substantially equal intervals (FIG. 13). The small holes 90 are provided mainly at the positions of the left and right ends for fixing with U bolts 91 to the support pipes 14 forming the house frame of the end face 15 described later (see FIGS. 2 and 12). Alternatively, it is also used when fixing to the upper rail 12. As a relief window for connecting bolts when the two upper rails 2 and 2 (not shown) are connected in the center, there is one small hole 90'drilled horizontally in a slightly large oval shape in the center. It has been drilled.

Rollers 1 to 4 will be described. Four rollers 1 to 4 are mounted on the plate in front of the base plate 9. Of the rollers 1 to 4, the three rollers except for any one of the central rollers 3 and 4 described later (the central roller 3 in this embodiment) are the same product. As shown in FIG. 5, a support shaft 17 is provided on a columnar rotatable pulley 16 made of synthetic resin and having a diameter of about 26 mm. The pulley 16 having the groove portion 16a has a thickness of about 7 mm, and the support shaft 17 protrudes about 8 mm from the center of the back surface of the pulley 16 and is inserted into a predetermined position of the base plate 9 and fixed with a nut 17a. (See FIGS. 1, 3B, 8).
On the other hand, as shown in FIG. 6, the central roller 3 described later has two pulleys 16 of the rollers (1, 2, 4) of FIG. 5 stacked and fixed by one common support shaft 17. It is formed on a heavy roller. The groove portion 16a is provided so as to be separated from the groove portion 16a of the other central roller 4 in the depth direction. That is, the length in the depth direction is formed to be about 14 mm thicker than the other rollers (1, 2, 4). This is because the wire 8 is hung on the groove 16a separated in the depth direction so that the wires 8 intersecting between the left and right rollers 3 and 4 in the center do not come into contact with each other.
These rollers 1 to 4 are roughly classified into two types, end rollers 1 and 2, and center rollers 3 and 4, depending on the position and function of installation.

The end rollers 1 and 2 are a pair of left and right end rollers 1 and a right end roller 2 arranged and installed at both ends of the base plate 9, respectively. Specifically, the left and right end rollers 1 and 2 are installed at positions about 15 mm inside each of the left and right ends of the base plate 9 and about 7.5 mm above each of the lower ends of the base plate 9.

The central rollers 3 and 4 are a pair of left and right central rollers 3 and a right central roller 4 installed at positions close to each other in the central portion of the base plate 9. Specifically, the center roller 3 on the left side is installed at the lower end (a position about 7.5 mm above the lower end of the base plate 9) at a position closer to the center by about 1325 mm from the left end of the base plate 9 (total length of about 2700 mm). Similarly, the center roller 4 on the right side is installed at the lower end (position about 7.5 mm above the lower end of the base plate 9) at a position closer to the center by about 1325 mm from the right end of the base plate 9. In other words, the left and right center rollers 3 and 4 are installed at positions separated from the center (center line) of the base plate 9 by about 25 mm to the left and right. That is, the left and right center rollers 3 and 4 and the left and right end rollers 1 and 2 are installed at the same level (on the line) at the lower ends of the base plate 9.
As described above, the center roller 3 on the left side is implemented by a double roller (FIG. 6) in the case of the present embodiment, and the groove portion 16a is separated in the depth direction as compared with the center roller 4 on the other right side. Is provided so as to be located (Fig. 1A). However, since either the left or right central roller 3 or 4 may be provided at a distance in the depth direction, the right center roller 4 is placed in the depth direction instead of the left center roller 3 as in the present embodiment. It is also possible to carry out with a double roller provided with a groove portion 16a separated from each other (not shown).

The wire 8 will be described. This stainless steel wire 8 has a diameter of about 1.2 mm and a total length of about 6.5 m. At the end connection points indicated by reference numerals A in FIG. 7A, as shown in FIGS. 7B and 7C, the ends 8a and 8b of the wire 8 are connected by caulking with a sleeve 85 using a tool. It is formed endlessly.
A method of winding the wire 8 around the rollers 1 to 4 will be described. As shown in FIG. 1, in the present embodiment, the winding starts from the winding on the left end roller 1. First, the wire 8 is wound around the left end roller 1 from below to upward and faces inward (see reference numeral K2 in FIG. 1C), and then is located behind the center roller 3 of the left double roller. After being hung above the groove 16a (FIG. 1A, FIG. 3B), it is hung below the adjacent center roller 4 on the right side and faces outward (see reference numeral S1 in FIG. 1C), and then on the right side. It is wound around the intervening roller 6 from below to upward, faces inward, is hung above the center roller 4 on the right side, and then hung below the groove 16a located in front of the adjacent center roller 3 on the left side. It is formed endlessly by being connected to the wire 8 before being wound around the left end roller 1 (see reference numeral K1 in FIG. 1C).
However, the winding of the wire 8 around the rollers 1 to 4 may be wound clockwise in addition to the counterclockwise winding described above, and the winding start and end positions (end portion 8a of the wire 8) may be wound. , 8b connection position) may be anywhere as long as it is endless.
As described above, the wires 8 cross in an X shape at the central portion when viewed from the front, but are configured so as not to come into contact with each other. Therefore, when the wires 8 located above and below move in opposite directions from the central portion, respectively. Smooth opening and closing of the sliding doors 30 (30A, 30B) is realized without rubbing or interfering with each other.

Therefore, the wire 8 wound around the rollers 1 to 4 has a mechanism of moving as shown in FIG. 1C. That is, in the wire 8 located below between the center roller 4 on the right side and the end roller 2 on the right side, when the wire 8 is moved to the right from the position indicated by the arrow S1, the wire located above. 8 moves as indicated by the arrow S3 in the opposite direction. At that time, the wire 8 located below between the center roller 3 on the left side and the end roller 1 on the left side moves to the left from the arrow position of the symbol K1, and the wire 8 located above moves in the opposite direction. It moves as indicated by reference numeral K3. That is, the wire 8 is moved from the center to the right end position indicated by the right arrow indicated by the symbol S2 from the center to the right side, and at the same time, is moved from the center to the left end position indicated by the arrow K2 on the left side. ..
In short, when the right door (30B) moves to the right as shown by the reference numerals S1 → S2 by winding the wire 8 around the rollers 1 to 4 described above, the left door (30A) moves like the reference numeral K1 → K2. It moves to the left in the opposite direction, and the left and right doors 30A and 30B move in opposite directions (see FIGS. 12 and 13).

Thus, as shown in FIG. 3B, the base plate 9 provided with the wire 8 wound around each of the rollers 1 to 4 described above is the inner surface of the upper rail 12 of the end surface 15 (FIG. 12) of the house frame, in detail. Is installed on the inner surface of the upper rail fixing bracket 18 that holds the upper rail 12. That is, in the base plate 9, the U bolt 91 hooked on the support pipe 14 of the greenhouse 10 on the outer surface of the upper side rail 12 is inserted into the mounting hole 90, and the upper side rail 2 is tightened with the wing nut 92 to the upper side rail 12. They are installed in contact with each other (FIGS. 4 and 13).

Next, a method of fixing the sliding doors 30 (30A, 30B) to the wire 8 will be described.
As shown in FIG. 8, an L-shaped wire fixing bracket 80 is installed at the inner end of each upper portion 31 of the sliding door 30 (30A, 30B), and the wire 8 is connected to the wire fixing bracket 80. It is fixed (see FIG. 2).
As shown in FIGS. 9 to 11, the wire fixing bracket 80 is formed in an L shape by a horizontal portion 80a and a vertical portion 80d in which the base portion of the horizontal portion 30a hangs downward. At the tip of the horizontal portion 80a, a holding metal fitting 80b for sandwiching the wire 8 is provided so as to be freely tightenable with a built-in screw 80c with a washer 80f. The center of the vertical portion 80d is formed in a fixed notch portion 80e notched downward in a U shape.
Therefore, as shown in the examples shown in FIGS. 3 and 8, the wire fixing bracket 80 vertical portion 80d is brought into contact with the inner end portion of the cross rail constituting each upper portion 31 of the sliding door 30 (30A, 30B) and fixed thereof. The wing nut 82 is inserted into the notch 80e and tightened and fixed with the plate bolt 81.
Then, the wire 8 is inserted between the lower surface of the horizontal portion 80a of the wire fixing metal fitting 80 and the holding metal fitting 80b. The upper portion 31 of the left door 30A is connected to the lower wire 8 hung on the left end roller 1 and the left central roller 3, and the lower portion hung on the right end roller 2 and the right central roller 4. The upper portion 31 of the door 30B on the right side is connected to the wire 8 at the position (see FIGS. 1B and 2), and when the position is determined in that way, the door 30B with a washer 80f is tightened to connect and fix the upper portion 31.
Normally, as described above, the upper portion 31 of the sliding doors 30 (30A, 30B) is fixed to the wire 8 located below, but in some cases, the doors 30A, 30B are fixed to the wire 8 located above. It is also possible to adopt a embodiment in which the upper portion 31 of the above is fixed.

As shown in FIG. 13, the sliding door for a greenhouse described above is preferably implemented by installing a mainspring unit 50.
That is, the second wire (51) retractable mainspring unit 50 is installed at the inner end of each of the upper portions 31 of the left and right sliding doors 30A and 30B toward the closing direction, and the tip 51a of the second wire 51 is said. It is connected to the center position of the upper rail 12 or the base plate 9. The mainspring unit 50 automatically closes the sliding doors 30A and 30B via a second wire 51 that is wound around a mainspring portion and a damper portion (both omitted in the drawing) that can rotate independently of each other. It is carried out in possible units. When the left and right doors 30A and 30B are released after being opened, the second wire 51 of the mainspring unit 50 is pulled in and both doors 30A and 30B are smoothly self-closed at the same time. However, it is also possible to install the mainspring unit 50 only at 30A or 0B on either the left or right side.

Therefore, in the sliding door for the greenhouse, when the worker opens either the left or right door 30A or 30B in the closed state as shown in FIG. 1B, the other door 30B or 30A simultaneously opens the other door 30A or 30B. As it opens (FIG. 12), the left and right doors 30A and 30B are fully opened as shown in FIG. When closing, vice versa, if the worker closes either the left or right door 30A or 30B in the fully open state of FIG. 13, the other door 30B or 30A closes at the same time, and finally. Is in its original closed state (see FIG. 1B).

Although the examples have been described above with reference to the drawings, the present invention is not limited to the illustrated examples, and for example, the rollers 1 to 4 and the wire 8 are directly installed on the upper rail 12 without the base plate 9 described above. It is mentioned just in case that the range of design changes and application variations that those skilled in the art usually make is included within the range that does not deviate from the technical idea.

1, 2 End rollers 3, 4 Central rollers 10 Greenhouse 11 Doorway opening 12 Upper rail 13 Lower rail 14 Strut pipe 16 Slider 16a Groove 17 Support shaft 30 Sliding door 30A One door 30B The other door 31 Upper 40 Door wheel 50 Unit 51 2nd wire 51a Tip 8 Wire 80 Wire fixing bracket 81 Plated bolt 82 Wingnut 9 Base plate 90 Mounting hole 91 U bolt 92 Wingnut

Claims (9)

Endless wires are provided on the base plate installed near the upper rail of the entrance / exit opening of the greenhouse via a plurality of rollers, and the upper parts of the left and right sliding doors provided with door rollers in the upper rail or the lower rail. Is a sliding door for greenhouses, which is connected to the wire and the other door is opened and closed at the same time according to the opening and closing of either the left or right door.
The roller is composed of a pair of left and right end rollers arranged at both ends of the base plate and a pair of left and right center rollers arranged at the center of the base plate.
The wire is wound from the bottom to the top on the left end roller to go inward, hung above the left center roller, and then hung below the adjacent right center roller to the outside. Facing, then wrapping around the right end roller from bottom to top, heading inward, hung above the right center roller, and then hung below the adjacent left center roller to the outside. It is formed endlessly by being connected to the wire before being wound around the left end roller.
The upper part of the one door is connected to the lower wire between the left end roller and the left center roller, and the other door is connected to the lower wire between the right end roller and the right center roller. The upper part of the door is connected, the other door opens at the same time according to the opening operation of one of the left and right doors, and the other door closes at the same time according to the closing operation of either the left or right door. A featured sliding door for greenhouses. The upper part of the one door is connected to the upper wire between the left end roller and the left center roller, and the other door is connected to the upper wire between the right end roller and the right center roller. The upper part of the door is connected, the other door opens at the same time according to the opening operation of one of the left and right doors, and the other door closes at the same time according to the closing operation of either the left or right door. The sliding door for a greenhouse according to claim 1, which is characterized. Claim 1 is characterized in that one of the left and right central rollers is arranged so as to be separated from the other central roller in the depth direction, and the wires intersecting between the left and right central rollers do not come into contact with each other. Or the sliding door for the greenhouse described in 2. The central roller on either the left or right side is characterized in that the depth is formed longer than that of the other central roller, and the groove portion for hanging the wire is provided so as to be separated from the groove portion of the other central roller in the depth direction. The sliding door for a greenhouse according to any one of claims 1 to 3. Claims 1 to 4, wherein an L-shaped wire fixing bracket is installed at an inner end portion of each upper portion of the left and right sliding doors, and the wire is connected and fixed to the wire fixing bracket. Sliding doors for greenhouses listed in any one of. The sliding door for a greenhouse according to any one of claims 1 to 5, wherein bearings are loaded in the door rollers of the left and right sliding doors. The sliding door for a greenhouse according to any one of claims 1 to 6, wherein the base plate is attached to a greenhouse column pipe via a U bolt on the inner surface of the upper rail. .. The sliding door for a greenhouse according to any one of claims 1 to 9, wherein the rollers and wires are installed directly on an upper rail without a base plate. A second wire retractable mainspring unit is installed on the upper part of either the left or right door, and the tip of the second wire is connected to the upper rail or the base plate, so that either the left or right door is opened. The slide for a greenhouse according to any one of claims 1 to 8, wherein the second wire of the mainspring unit is pulled in and both the left and right doors are self-closed at the same time when the door is released. Ceremony door.