JP2008211969A - Roof truss structure of vinyl greenhouse for agriculture and horticulture - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a roof truss structure of a vinyl greenhouse for agriculture and horticulture efficiently constructed by anybody in a short time. <P>SOLUTION: This roof truss structure is such that the upper ends of a rafter metal straight pipe (2) are connected and united to each other through a ridge first metal pipe joint (A1) bent in a mountain shape of about 120 degrees (θ), and top and bottom mutual intervals between the rafter metal straight pipe (2) and a pillar metal straight pipe (1) are connected and united to each other through the same pole plate first metal pipe joint (B1) as the ridge first metal pipe joint (A1), and back and front mutual intervals between the ridge first metal pipe joint (A1) and a ridge metal straight pipe (3) are connected and united to each other through a ridge second metal pipe joint (A2) different from the first metal pipe joints (A1) and (B1), and back and front mutual intervals between the pole plate first metal pipe joint (B1) and a pole plate metal straight pipe (4) are connected and united to each other through a pole plate second metal pipe joint (B2) the same as the ridge second metal pipe joint (A2). <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a hut structure comprising an agricultural greenhouse, an assembly tent, a garage, a warehouse, a poultry house, and other metal straight pipes.

The structure of a hut that uses a straight metal pipe (steel pipe) as an aggregate and its construction method in the field are disclosed in the following patent documents, among which JP-A-10-178925 (name of invention: resin wood as a base material) Is a known technique that most closely approximates the present invention.
Japanese Patent Laid-Open No. 10-178925 Japanese Patent Laid-Open No. 11-28027 JP-A-11-210720

  However, in the pipe house (10) of the above-mentioned Japanese Patent Application Laid-Open No. 10-178925, the roof structure of the roof pipe (2), the roof pipe (3), the crosspiece pipe (4) and the ridge pipe (5) At least the joint (6) used for the corner, the joint (8) also used for the middle part of the roof, the joint (7) used for the ridge part, and the joint (9) also used for the middle part of the ridge Four different types of joints (6), (7), (8), and (9) must be prepared for production, and this type of joint cannot be used for mass production. The on-site construction method 10) is remarkably complicated, and there is a problem that it cannot be assembled efficiently in a short time.

  The present invention aims to improve such problems, and in order to achieve the object, in claim 1, the upper end of the straight metal pipe for rafters is about 120 as a roof structure such as an agricultural greenhouse. Is connected and integrated through the first metal pipe joint for ridges that bends in a chevron shape,

  While the rafter metal straight pipe and the column metal straight pipe are connected and integrated through the same first metal pipe joint for eaves girder as the first metal pipe joint for the building,

  The front and back of the first metal pipe joint for building and the straight metal pipe for building are connected and integrated through a second metal pipe joint for building different from the first metal pipe joint,

  The first metal pipe joint for eaves girder and the metal straight pipe for eaves girder are connected and integrated through the same second metal pipe joint for eaves girder as the second metal pipe joint for eaves girder. It is characterized by that.

  Further, in claim 2, the both ends of the first metal pipe joint are expanded as a pair of cylindrical sockets,

  The screw holes for receiving the set screws and the spare pilot holes are distributed in parallel from the angled corners on the circumferential surfaces of the two large-diameter sockets.

  Further, in claim 3, the second metal pipe joint includes a cylindrical socket and an arc-shaped locking hook continuously extended integrally from the position eccentric to the half of the flat back cover surface,

  On the circumferential surface of the socket, a screw hole for receiving a set screw and a spare pilot hole are distributed as a pair facing each other at about 180 degrees,

  The base part of a separate pressing cover plate that has a substantially arc shape facing the locking hook is attached to the corresponding root part of the locking hook via a fixing bolt so that it can be moved forward and backward.

  Similarly, a key that continuously protrudes from the front end portion of the presser cover plate is inserted and locked in a key hole that opens to the corresponding front end portion of the locking hook.

  According to the said structure of Claim 1, since the 1st metal pipe joint for ridges and the 1st metal pipe joint for eaves girders are made into the mutually same kind, it is bent and formed in the mountain shape of about 120 degree | times, For rafters The upper ends of the straight metal pipes are connected by the first metal pipe joint for ridges, and the vertical metal pipes for the rafters and columns are connected by the first metal pipe joint for eaves girders. It is possible to obtain a stable and solid gable roof structure in which the straight metal pipes stand vertically from the ground.

  Further, the second metal pipe joint for ridges and the second metal pipe joint for eaves girders are also formed as different from the first metal pipe joint as one kind, and the first metal pipe joint for ridges and the ridge The second metal pipe joint for the eaves and the first metal pipe joint for the eaves and the metal straight pipe for the eaves are connected by the second metal pipe joint for the eaves. Since each of the shafts is assembled, the convenience of the hut assembly work and the mass production effect of the metal pipe joint are remarkably excellent.

  If the said structure of Claim 2 is employ | adopted, the entrance corner side which makes the mountain shape of about 120 degree | times on the circumferential surface of the socket which receives the metal straight pipe for pillars in the 1st metal pipe joint and the metal straight pipe for rafters Since the screw holes and spare pilot holes are distributed in parallel, the heads of set screws that are planted in the screw holes and the heads of drill screws or tapping screws that are planted following the pilot holes Therefore, there is no possibility of damaging a vinyl sheet attached to the roof structure, and there is an effect that a roof material and a wall material such as a canvas, a synthetic resin board, and a wooden board can be attached without hindrance instead of the vinyl sheet.

  If the above configuration of claim 3 is adopted, since the socket of the second metal pipe joint and the locking hook are in an opening directivity perpendicular to each other, a substantially arc-shaped pressing cover plate facing the locking hook is provided. Combined with the fact that the forward and backward operation is performed by the fixing bolt, it can be easily inserted and locked into the middle portion of the first metal pipe joint.

  In addition, since the locking hook and the pressing cover plate for that purpose are extended from a position eccentric to one half of the flat back cover surface of the cylindrical socket, a second metal is separately provided to the other half of the socket. The same locking hook and presser cover plate of the pipe joint can be inserted into and locked to the first metal pipe joint so as to be unified as an aligned state from the opposite direction. There is no risk of overhanging.

  Hereinafter, the specific configuration of the present invention will be described in detail with reference to the drawings. FIG. 1 schematically shows a gable roof shed structure that becomes an agricultural greenhouse, which is a vertical metal straight pipe for a pillar ( 1) and straight metal pipes for rafters (2), horizontal ridge metal straight pipes (3), and parallel eaves girder metal straight pipes (4) as main basic aggregates. It is assembled so that it can be disassembled from two or more through two kinds of first and second metal pipe joints (A1) (B1) (A2) (B2).

  The metal straight pipe for pillars (1), the metal straight pipe for rafters (2), the metal straight pipe for ridges (3) and the metal straight pipe for eaves girders (4) are plated with the same galvanized steel. A structural carbon steel pipe having, for example, an outer diameter of about 48.6 mm and a wall thickness of about 1.8 mm or about 2.4 mm, and is used under an appropriate cut length.

  First, the first metal pipe joints (A1) and (B1) can be used interchangeably for the ridge part (A) and the eaves girder part (B) of the roof structure, and the metal straight pipes (1) (2) (3) It is bent from the same general structure carbon steel pipe as (4) into a mountain shape of about 120 degrees (θ) as shown in FIGS. ) (3) It has the same outer diameter as that of (4), but only the both ends of the fixed length are separated as a pair of cylindrical sockets (5) and (5). 1) (2) (3) When expanded (expanded) to a diameter corresponding to the outer diameter of (4), the rafter metal straight pipe (2) and the columnar metal straight pipe (1) The cut-off end can be received. (5a) and (5a) are receiving steps for the straight metal pipe of the sockets (5) and (5).

  (6) and (6) are screw holes that are burringed on the circumferential surfaces of the sockets (5) and (5), respectively. Here, the rafter metal straight pipe (2) and the pillar metal straight pipe (1 The head-attached stop screws (7) and (7) for pressing and fixing the outer peripheral surface of the) are respectively planted in advance.

  Also, (8) and (8) are spare pilot holes respectively drilled on the circumferential surfaces of both sockets (5) and (5), in a state of being juxtaposed next to the screw holes (6) and (6). Yes, if the user later plantes a drill screw or tapping screw (not shown), the pressing and fixing force of the rafter metal straight pipe (2) and pillar metal straight pipe (1) can be increased. It has become.

  In this case, as is apparent from FIGS. 2 and 4, the pair of the screw holes (6) (6) and the prepared holes (8) and (8) are bent as a mountain shape of about 120 degrees (θ). A plastic sheet (not shown) that is concentrated on the corners of the metal pipe joints (A1) and (B1) and that a user attaches as a roofing material or wall material of an agricultural greenhouse is attached to the retaining screw. (7) The head of the drill screw or tapping screw is retracted so as not to be accidentally damaged.

  However, as the set screw (7), (7), drill screw or tapping screw, those with hexagonal holes that do not have a head are adopted, so that their screw holes (6) (6) and pilot holes (8) (8 ) May be processed to the circumferential surfaces of both sockets (5) and (5) from the protruding corners of the first metal pipe joints (A1) and (B1). This is because there is no possibility of damaging the vinyl sheet.

  Next, the second metal pipe joint (A2) (B2) is also one type that can be used interchangeably for the ridge part (A) and the eaves part (B) of the roof structure. ) As an overall shape different from (B1), it is cast as shown in FIGS. 6 to 11 from ductile cast iron or zinc alloy.

  That is, in FIGS. 6 to 11 in which the second metal pipe joints (A2) and (B2) are extracted and shown, (9) is the metal straight pipe for buildings (3) and the metal straight pipe for eaves girder parallel thereto. It is a cylindrical socket that receives the cut-off end of (4), and has a bore size substantially corresponding to the outer diameter of the metal straight pipes (3) and (4).

  The socket (9) has a screw hole (10) and a spare pilot hole (11) distributed as a pair facing each other at about 180 degrees on the circumferential surface of the socket (9). On the other hand, a headed set screw (12) that holds and fixes the outer peripheral surface of the ridge metal straight pipe (3) and eaves girder metal straight pipe (4) is planted in advance, while a spare pilot hole is provided. After the user has planted drill screws or tapping screws (not shown) following (11), the holding fixing force of the ridge metal straight pipe (3) and eaves girder metal straight pipe (4) can be increased. Yes.

  The screw hole (10) and the pilot hole (11) on the second metal pipe joint (A2) (B2) side are the screw holes (6) (6) on the first metal pipe joint (A1) (B1) side. Moreover, it is the same as the pilot holes (8) and (8), and the compatibility of the retaining screws (7), (7), (12), drill screws or tapping screws to be planted in these is demonstrated.

  Reference numeral (13) denotes a locking hook continuously extended integrally from an eccentric half of the flat back cover surface (9a) of the cylindrical socket (9) to the rear side thereof. ) Is formed in an arc shape from a direction perpendicular to the cylindrical core wire, and is inserted from the radial direction into the midway part of the metal straight pipe for rafters (2) and the first metal pipe joint (A1) (B1). It can be stopped. This can also be inserted and locked in the middle part of the columnar straight metal pipe (1).

  Moreover, the arc-shaped locking hook (13) is adjacent to the back cover surface (9a) of the cylindrical socket (9) at the root portion thereof, and the socket hole (10) and the pilot hole ( 11) An adjustment screw hole (14) having a direction orthogonal to 11) is formed so as to penetrate therethrough, and a substantially rectangular key hole (15) is also cut out at the extended tip of the locking hook (13).

  (16) is a preliminary pilot hole that is formed in the middle of the locking hook (13), and the rafter metal straight pipe is drilled or tapped by a user to be planted here (not shown). (2) and the outer peripheral surface of the first metal pipe joint (A1) (B1) can be pressed and fixed.

  Further, (17) is a pressing cover plate made of a steel plate that is independent of the locking hook (13), and its tip is bent in a substantially arc shape facing the arc-shaped locking hook (13). The remaining flat base portion cantilevered as shown in the chain line in FIGS. 6 and 11 through the fixing bolt (18) planted in the adjusting screw hole (14) of the locking hook (13). Attached to the state. (19) is a hole for inserting a fixing bolt that opens at the base of the pressing cover plate (17).

  (20) is a key continuously protruding from the tip of the presser cover plate (17), and this key is detachably inserted into the corresponding key hole (15) of the locking hook (13). Thus, in combination with the screwing operation of the fixing bolt (18), the latch is inserted and locked into the rafter metal straight pipe (2) or the first metal pipe joint (A1) (B1). The hook (13) is pressed and fixed in a restrained state in which it cannot be displaced.

  When constructing the above-mentioned aerial greenhouse greenhouse structure, prepare a plurality of straight metal pipes for rafters (2) and straight metal pipes for pillars (1) cut to appropriate lengths. The rafter metal straight pipe (2) is constructed by using the first metal pipe joint for building (A1) as shown in FIGS. The eaves girder (B) where the straight metal pipe (2) and the straight metal pipe (1) cross may be assembled by using the same first eaves pipe joint (B1).

  That is, as is clear from the enlarged views of FIGS. 14 to 16 in which the ridge portion (A) of the above-mentioned hut structure is extracted, this is inserted into both sockets (5) and (5) of the first metal pipe joint for ridge (A1). Stop screws that are pre-planted in the screw holes (6) and (6) of the sockets (5) and (5), respectively, by inserting the upper ends of the cut-off metal straight pipes (2) corresponding to (7) By the screwing operation of (7), they are connected and integrated in the retaining state.

  On the other hand, as clearly seen from the enlarged front view of FIG. 17 where the eaves part (B) having the same structure is extracted, into the sockets (5) and (5) of the first metal pipe joint (B1) for eaves, The lower end of the rafter metal straight pipe (2) and the upper end of the pillar metal straight pipe (1) are respectively inserted, and both of them are screw holes (6) (6) of the sockets (5) (5). ) And screwing the retaining screws (7) and (7) that are planted in advance, and they are connected and integrated in the retaining state.

  Then, the pillar metal straight pipe (1) stands upright from the ground (G) as a stable and solid gable roof structure, and the pillar metal straight pipe (1) and rafter metal straight pipe ( 2) and the shaft assembly in the eaves part (B) and the metal straight pipe for rafters (2) and the shaft assembly in the ridge part (A) of each other, 1 of the same first metal pipe joint (A1) (B1) It can be done easily and conveniently depending on the type, and both the eaves part (B) and the ridge part (A) can be kept in the same crossing state of about 120 degrees (θ).

  This is possible for the first time because the first metal pipe joint (A1) (B1) is bent and formed into a mountain shape of about 120 degrees (θ), and when it is shaped at other bending angles, It is not possible to obtain a regular rigid hut structure in which the column straight metal pipe (1) stands vertically from the ground (G).

  In addition, when it is necessary to reinforce the pressing and fixing force of the first metal pipe joints (A1) and (B1) to the rafter metal straight pipe (2) and the pillar metal straight pipe (1), the first metal pipe The user may additionally plant a drill screw or a tapping screw in the preliminary pilot holes (8) and (8) opened to the joints (A1) and (B1).

  In addition, a plurality of straight metal pipes for buildings (3) and straight metal pipes for eaves girders (4) cut to an appropriate length are prepared, and the straight metal pipe for buildings (3) and the above building are also prepared. The ridge part (A) where the first metal pipe joint (A1) intersects with the second metal pipe joint (A2) for different ridges as shown in FIGS. If the eaves part (B) where the metal straight pipe (4) and the first metal pipe joint (B1) for eaves crosses is also assembled by using the second metal pipe joint (B2) for eaves good.

  That is, as is clear from the enlarged plan and bottom views of FIGS. 14 and 15 in which the ridge part (A) of the above-mentioned roof structure is extracted, the metal for ridges is inserted into the socket (9) of the second metal pipe joint (A2) for ridges. Both ends of the straight pipe (3) are inserted into the front and rear ends, both of which are prevented from coming off by screwing the stop screw (12) pre-planted into the screw hole (10) of the socket (9). Connect and integrate.

  Before and after this, the locking hook (13) of the second metal pipe joint for building (A2) is inserted so as to be orthogonal to the middle part of the first metal pipe joint for building (A1), and the pressing cover thereof The first and second metal pipe joints (A1) and (A2) for ridges are kept in an integrated connection state by pressing and fixing by attaching the plate (17).

  On the other hand, as shown in FIGS. 12 and 13 where the eaves-spar portion (B) having the same roof structure is clearly shown, the straight metal pipe (4) for eaves-girder into the socket (9) of the second metal pipe joint (B2) for eaves Both the front and rear end portions are respectively inserted, and both of them are connected to the retaining state by the screwing operation of the retaining screw (12) planted in the screw hole (10) of the socket (9).

  Before and after this, the locking hook (13) of the second metal pipe joint (B2) for eaves girder was inserted into the middle part of the first metal pipe joint (B1) for eaves girder from the radial direction, The presser cover plate (17) is pressed and fixed, and the first and second metal pipe joints (B1) and (B2) for the eaves are also connected and integrated.

  Furthermore, the straight metal pipe (21) for the purlin made of the same carbon steel pipe as the straight metal pipe for rafters (2) is also parallel to the straight metal pipe for buildings (3) and the straight metal pipe for eaves (4). In the case of shaft assembly, as shown in FIGS. 1 and 13, one type of the second metal pipe joint (A2) (B2) is also used interchangeably for the main building (C) of the roof building structure, The front and rear ends of the straight metal pipe (21) for the main purlin are inserted into the socket (9) of the second metal pipe joint (C2) for the same main wall as shown in FIGS. ) Is screwed into the screw hole (10) and is screwed into the screw hole (10) in advance, so that they are connected and integrated in a retaining state.

  And in parallel with this, while inserting the locking hook (13) of the second metal pipe joint (C2) for the purlin into the middle part of the metal straight pipe for rafters (2) from the radial direction, The rafter metal straight pipe (2) and the purlin metal straight pipe (21) are connected and integrated by attaching and holding the presser cover plate (17).

  In any case, the arc-shaped locking hook (13) of the second metal pipe joint (A2) (B2) (C2) and the pressing cover plate (17) are half of the cylindrical socket (9). Since the second metal pipe joint (A2) (B2) (C2) has the same locking hook (13) and the holding cover plate (17) to the other half of the socket (9). As shown in FIGS. 14 and 15 and the enlarged plan and bottom views of FIGS. 18 and 19, the first metal pipe joints (A1) and (B1) and the rafter metal are combined into a single state in the opposite direction. It can be inserted and locked into the straight pipe (2), and there is no risk of overhanging in the radial direction.

  In that case, the fixing bolt (18) of the holding cover plate (17) in the second metal pipe joint (A2) (B2) (C2) has a directivity to be screwed from below, and the vinyl sheet is damaged by the head. It is preferable to prevent the risk of doing so.

  Further, in order to reinforce the roof structure and to define the entrance / exit, the vertical metal straight pipe (22) stands upright in the middle of the rafter metal straight pipe (2). A cylindrical socket (23) and a third metal pipe joint (D) in which a blade (24) continuously extends from its outer peripheral surface, and a cylindrical socket (25) as shown in FIG. As is apparent from FIGS. 24 to 27, the third metal pipe joint (E) is used by using the fourth metal pipe joint (E) in which the blade plate (26) continuously and integrally projects from the center of the back cover surface (25 a). The socket (23) of D) is inserted into the straight metal pipe (2) for rafters and is fixed by pressing the retaining screw (27), while the socket (25) of the fourth metal pipe joint (E) ) Is inserted into the upper end of the straight metal pipe (22) for the stud, and is also stopped To hold it fixed by screwing operation of the scan (28).

  Then, a single pivot bolt (31) that pierces and penetrates the blades (24), (26) of the third and fourth metal pipe joints (D), (E) into their adjustment slots (29), (30). ) And the fixing nut (32). By using the third and fourth metal pipe joints (D) and (E), the horizontal metal pipe (1), the rafter metal straight pipe (2), and the intermediate metal pipe (22) can be placed horizontally. A shaft of a straight metal pipe (not shown) for a connecting beam can also be performed. Reference numerals (33) and (34) denote bundling wire insertion holes distributed in the blades (24) and (26) of the third and fourth metal pipe joints (D) and (E).

  In the illustrated embodiment, the roof structure of the greenhouse for agriculture is covered with a vinyl sheet as a roofing material or wall material, but in the structure of a roof such as an assembly tent, garage, warehouse, or poultry house, Lightweight materials such as waterproof canvas and corrugated board, corrugated board, synthetic resin board, and wood board that replace the vinyl sheet are used as roofing and wall materials, using special fasteners (not shown). Sometimes it is done.

It is a schematic diagram of the roof structure according to the present invention. It is a front view which extracts and shows a 1st metal pipe joint. FIG. 3 is a plan view of FIG. 2. FIG. 3 is a bottom view of FIG. 2. FIG. 3 is a side view of FIG. 2. It is a front view which extracts and shows a 2nd metal pipe joint. FIG. 7 is a rear view of FIG. 6. FIG. 7 is a plan view of FIG. 6. FIG. 7 is a bottom view of FIG. 6. FIG. 7 is a side view of FIG. 6. It is the 11-11 line sectional view of FIG. It is an enlarged front view of FIG. FIG. 13 is a plan view of FIG. 12. It is an enlarged plan view which extracts and shows the ridge part of FIG. It is a bottom view of FIG. FIG. 16 is a cross-sectional view taken along line 16-16 in FIG. 15. It is an expanded sectional view of an eaves girder part. It is an enlarged plan view of a purlin part. It is a bottom view of FIG. It is a 20-20 line expanded sectional view of FIG. FIG. 20 is an enlarged sectional view taken along line 21-21 in FIG. It is a perspective view which extracts and shows a 3rd metal pipe joint. It is a perspective view which extracts and shows a 4th metal pipe joint. It is a schematic diagram corresponding to FIG. 1 which shows the deformation | transformation embodiment of a cabin structure. It is an enlarged front view of FIG. FIG. 26 is a plan view of FIG. 25. It is the 27-27 line expanded sectional view of FIG.

Explanation of symbols

(1) · Metal straight pipe for pillars (2) · Metal straight pipe for rafters (3) · Metal straight pipe for buildings (4) · Metal straight pipe for eaves girders (5) · Socket (5a) · Receiving step ( 6) · Screw hole (7) · Set screw (8) · Pilot hole (9) · Socket (9a) · Back cover surface (10) · Screw hole (11) · Pilot hole (12) · Set screw (13) · Locking hook (14) · Adjustment screw hole (15) · Key hole (16) · Pilot hole (17) · Presser cover plate (18) · Fixing bolt (19) · Fool hole (20) · Key (21) -Metal straight pipe for purlins (22)-Metal straight pipe for studs (23)-Socket (24)-Blade (25)-Socket (25a)-Back cover surface (26)-Blade (27) (28)・ Set screw (29) (30) ・ Elongation adjustment hole (31) ・ Pivot bolt (32) ・ Fixing nut (33) (34) ・ Through hole (A) ・ Building part (B) ・ Eave girder part (C) ・ Main building part (A1) (B1) ・ First metal pipe joint (A2) (B2) (C2) ・ Second metal pipe joint (D) ・3rd metal pipe joint (E), 4th metal pipe joint (G), Ground (θ), Crossing angle

Claims (3)

The upper ends of the rafter metal straight pipe (2) are connected and integrated through a first metal pipe joint for building (A1) bent into a mountain shape of about 120 degrees (θ),
The first metal pipe joint (B1) for eaves girders is the same as the first metal pipe joint (A1) for ridges between the metal straight pipe for rafters (2) and the metal straight pipe for pillars (1). While being connected and integrated via
The second metal pipe joint for building (A1) and the straight metal pipe for building (3) are different from the first metal pipe joint (A1) (B1) in the front and rear. Via A2), integrated and integrated,
The second metal pipe joint for eaves girder is the same as the second metal pipe joint for building (A2) in the front and rear of the first metal pipe joint (B1) for eaves girder and the straight metal pipe (4) for eaves girder. (B2) A roof structure such as a greenhouse for agriculture, characterized by being connected and integrated. The both ends of the first metal pipe joint (A1) (B1) are expanded as a pair of cylindrical sockets (5), and
Distribution of the screw holes (6) for receiving the set screws (7) and the spare pilot holes (8) in parallel from the angled corners of the circumferential surfaces of both large-diameter sockets (5) The roof structure of an agricultural greenhouse or the like according to claim 1. An arc-shaped latch in which the second metal pipe joint (A2) (B2) is continuously and integrally extended backward from a position where the second metal pipe joint (A2) (B2) is eccentric to one half of the cylindrical socket (9) and its flat back cover surface (9a). A hook (13),
On the circumferential surface of the socket (9), a screw hole (10) for receiving a stop screw (12) and a spare pilot hole (11) are distributed as a pair facing each other at about 180 degrees,
The base part of a separate pressing cover plate (17) having a substantially arc shape facing the locking hook (13) is connected to the corresponding root part of the locking hook (13) via a fixing bolt (18). It is attached so that it can move forward and backward, and
Similarly, a key (20) continuously protruding from the tip of the presser cover plate (17) is removably inserted into a key hole (15) opened at a corresponding tip of the locking hook (13). The roof structure of an agricultural greenhouse or the like according to claim 1, which is stopped.

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