JP6832667B2 - Connecting member - Google Patents

Description

The present invention relates to a tubular connecting member that connects a pair of arch members used in a greenhouse.

Conventionally, vinyl greenhouses used for cultivating agricultural products are known. Such a vinyl house is constructed by connecting a plurality of structural materials such as pipes with various connecting members (joints). For example, one end of each of the pair of arch members is embedded in the ground, and the other end is connected at the zenith using a tubular connecting member. Then, a vinyl house is constructed by arranging a plurality of such pairs of arch members and connecting members side by side (see FIG. 1).

Since greenhouses continue to be exposed to wind and rain, it is required to have higher weather resistance and strength. Therefore, for example, a connecting metal fitting for more firmly fixing the structural material has been proposed (see, for example, Patent Document 1). Further, an arch pipe connector composed of a double pipe has been proposed (see, for example, Patent Document 2).

Further, Patent Document 2 discloses a pipe house in which a sheet is stretched outside a house frame formed by assembling pipes, and an arch pipe connector used for forming a main arch constituting the house frame. There is. FIG. 11 shows a connecting pipe B in which the tips of the two arch pipes A are bent in a dogleg shape and the tips of the two arch pipes A are inserted into both ends of the connecting pipe B. .. Further, in FIG. 2A, an inner pipe 9 is inserted inside the outer pipe 8 so that both ends thereof protrude outward from each of the both ends of the outer pipe 8, and both ends of the outer pipe 8 are formed on the inner pipe 9. An arch pipe connector 2 made of a double pipe is shown, which is bent downward together with and has both ends bent downward as connecting portions 21 for connecting to the arch pipe 1.

Jitsuto No. 3009846 Gazette Japanese Unexamined Patent Publication No. 11-155387

The connecting metal fitting proposed in Patent Document 1 connects straight pipes in a cross shape. In addition to this, it is more preferable if the strength of the connecting member that connects the arch members can be increased. For example, when the arch member bends due to a gust or heavy snowfall, the connecting member receives compressive stress inward from the arch member. On the other hand, it is preferable to give the connecting member a strength that does not easily deform (buckle) even if the stress is concentrated on the connecting member.

Further, the arch member is slidably inserted with respect to the connecting member. Therefore, the arch member repeatedly slides with respect to the connecting member due to repeated loading by wind and rain. It is preferable that the connecting member is not easily deformed even when the arch member slides.

In the arch pipe connector proposed in Patent Document 2, an inner pipe is inserted inside the outer pipe, and both ends of the inner pipe are projected outward from both ends of the outer pipe. Then, both ends of the outer pipe are bent downward together with the inner pipe, and both ends bent downward are used as connecting portions to be connected to the arch pipe. A connecting member having a higher strength as in this type is preferable, and it is more preferable if the connecting member can be made less likely to be deformed by another configuration.

The present invention has been devised to solve the above problems, and an object of the present invention is to provide a connecting member that is not easily deformed (buckling).

The present invention is a connecting member for connecting a pair of arch members used in a vinyl greenhouse, and the pair of insertion portions provided at both ends and having openings into which each of the arch members can be inserted are formed. The present invention relates to a connecting member provided with a body portion thicker than the insertion portion, which is provided so as to connect the insertion portions of the above.

Further, the body portion includes a tubular relay portion integrally formed with the insertion portion, a reinforcing member arranged inside the relay portion and shorter than the total length of the insertion portion and the relay portion. May be provided.

Further, the reinforcing member may be formed by using a material having a yield strength larger than that of the relay portion.

Further, the body portion may have a bent portion.

Further, the reinforcing member may be formed with an outer diameter and an inner diameter substantially the same as the outer diameter and the inner diameter of the arch member.

Further, the length of the reinforcing member may be longer than the outer diameter of the reinforcing member.

Further, the present invention is a method of using a connecting member for connecting a pair of arch members used in a vinyl house, and the connecting member is provided at both ends thereof to form an opening into which each of the arch members can be inserted. The pair of insertion portions and the body portion provided so as to connect the pair of insertion portions and thicker than the insertion portion are provided, and the end portion of the arch member is inserted into the insertion portion. The present invention relates to a method of using the connecting member used.

Further, it is preferable that the body portion contacts the end portion of the arch member to restrict further insertion of the arch member.

According to the present invention, it is possible to provide a connecting member that is not easily deformed.

The plan view which connected the arch member by using the connecting member which concerns on one Embodiment of this invention is shown. The perspective view of the connecting member of one Embodiment is shown. The perspective view which inserted the arch member into the connecting member of one Embodiment is shown. A cross-sectional view of the connecting member of one embodiment cut in the radial direction is shown. The perspective view which inserted the reinforcing member into the connecting member main body of the connecting member of one Embodiment is shown. The plan view which arranged the connecting member of one Embodiment in a press die is shown. The plan view at the time of bending a connecting member of one Embodiment by a press die is shown. The schematic front view which supported the connecting member of one Embodiment by a strength test apparatus is shown. The test result when the connecting member of one embodiment was bent and tested is shown.

Hereinafter, embodiments of the connecting member according to the present invention will be described with reference to FIGS. 1 to 9.
The connecting member 1 according to the present embodiment is used when forming a ridge portion of a roof when constructing a vinyl house. Specifically, as shown in FIG. 1, one end of each of a pair of flexible arch members 2 (a) and 2 (b) made of iron or aluminum is embedded in the ground. Then, each of the other ends of the pair of arch members 2 (a) and 2 (b) is inserted into both ends of the tubular connecting member 1. A vinyl greenhouse is constructed by arranging a plurality of sets of a pair of arch members 2 (a) and 2 (b) and a connecting member 1 side by side. Each of the pair of arch members 2 (a) and 2 (b) is a so-called arch pipe (curved pipe) formed in a tubular shape. In the following description, each of the arch members 2 (a) and 2 (b) will be referred to as an arch member 2.

In the present embodiment, as shown in FIGS. 2 to 4, the connecting member 1 is formed by combining two pipe bodies, and the inner pipe 20 having a shorter size is contained in the outer pipe 10 having a longer size. Is formed into a double tube structure into which is inserted. Further, the connecting member 1 is formed by bending the outer pipe 10 and the inner pipe 20. Then, in the present embodiment, both the outer pipe 10 and the inner pipe 20 of the connecting member 1 are formed of JIS G 3445 "carbon steel pipe for machine structure" (STKM). In addition, JIS G 3444 "general structural carbon steel pipe" (STK) may be used. Further, these steel pipes may be plated steel pipes or welded steel pipes specified in "Hot-dip galvanized steel pipes and steel strips" of JIS G 3323.

Such a connecting member 1 includes a pair of insertion portions 101, 101 and a body portion 104.
The insertion portions 101 are formed as a tubular body having an opening having an inner diameter into which the arch member 2 can be inserted, and are provided in pairs. Such an insertion portion 101 is provided as both end portions of the tubular connecting member 1. Specifically, the insertion portions 101 are provided at both ends thereof as a part of the outer pipe 10. As shown in FIG. 3, the insertion portion 101 has a length such that the other ends of the arch member 2 can be inserted into the inside and the state in which the arch member 2 is inserted can be maintained. For example, the insertion portion 101 is preferably formed with a length of 2 to 2.5 times the outer diameter of the arch member 2.

The body portion 104 is provided between the pair of insertion portions 101 and 101, and is provided with a wall thickness (plate thickness) thicker than that of the insertion portions 101 (both ends). Specifically, as shown in FIG. 2, the body portion 104 has an inner diameter smaller than the inner diameter of the insertion portion 101. In the present embodiment, the body portion 104 is formed into a tubular shape having an inner diameter that is smaller than the inner diameter of the insertion portion 101. Such a body portion 104 includes a relay portion 102 and a reinforcing member 201.

The relay portion 102 is provided in the central portion in the length direction as a part of the outer pipe 10, and is integrally formed with the insertion portion 101. That is, in the present embodiment, the relay portion 102 and the pair of insertion portions 101, 101 are composed of the outer pipe 10. In the present embodiment, the relay portion 102 is formed to have an outer diameter and an inner diameter substantially the same as the outer diameter and the inner diameter of the insertion portion 101. That is, the relay portion 102 has substantially the same wall thickness (plate thickness) as the insertion portion 101. Further, the relay portion 102 has a bent portion 103 formed by bending. In the present embodiment, the relay portion 102 has a bent portion 103 at a central portion in the length direction thereof. For example, the relay portion 102 has a bent portion 103 that bends at an angle of 25 to 30 degrees.

The reinforcing member 201 is an inner pipe 20 inserted inside the outer pipe 10, and is a tubular member having an outer diameter smaller than the inner diameter of the relay portion 102. The reinforcing member 201 is preferably formed with an outer diameter of 0.85 times or more and 0.99 times or less the inner diameter of the outer pipe 10 (relay portion 102 and insertion portion 101). The reinforcing member 201 is preferably formed using a material having a yield strength higher than that of the relay portion 102, and is formed with an outer diameter and an inner diameter substantially the same as the outer diameter and the inner diameter of the arch member 2. Is preferable. Further, the length of the reinforcing member 201 is formed to be longer than the outer diameter of the reinforcing member 201.

According to the relay unit 102 and the reinforcing member 201 as described above, the reinforcing member 201 is arranged at a position overlapping the relay unit 102. Specifically, the reinforcing member 201 is arranged so as to overlap with the position of the bent portion 103 in the radial direction. As a result, the reinforcing member 201 is pressed against the inner surface of the relay portion 102 by bending by the bending portion 103, and is positioned (fixed) at a position overlapping the relay portion 102.

Such a connecting member 1 is used as follows.
First, one end of each of the pair of arch members 2 and 2 is buried in the ground. Then, one other end of the arch member 2 is inserted into one insertion portion 101 of the connecting member 1. Next, the other other end of the arch member 2 is inserted into the other insertion portion 101 of the connecting member 1. As a result, the pair of arch members 2 and 2 are connected by the connecting member 1 and used.

Each of the pair of arch members 2 and 2 is inserted until the other end contacts the end of the body portion 104 (reinforcing member 201), and the body portion 104 restricts further insertion. As a result, the body portion 104 (reinforcing member 201) is maintained in a state where both ends are pressed by the flexible arch member 2. Therefore, since the arch member 2 does not slide inside the insertion portion 101, deformation of the connecting member 1 can be prevented. Further, since the wall thickness of the reinforcing member 201 and the relay portion 102 combined is thicker than the wall thickness of the insertion portion 101, the strength of the body portion 104 is higher than that of the insertion portion 101. As a result, even if the connecting member 1 is subjected to compressive stress due to the bending of the arch member 2, the deformation of the connecting member 1 can be prevented.

Next, a method of manufacturing the connecting member 1 according to the present embodiment will be described.
First, as shown in FIG. 5, the straight tubular inner pipe 20 (reinforcing member 201) is inserted through the opening of the straight tubular outer pipe 10, passes through the insertion portion 101, and is arranged at the position of the relay portion 102. To. Then, as shown in FIG. 6, the outer pipe 10 in which the inner pipe 20 (reinforcing member 201) is arranged inside is set in the press die 4.

Here, the press die 4 rotates two receiving dies 41, 41 and two receiving dies 41, 41 in which a groove (not shown) having a diameter substantially the same as the outer diameter of the outer tube 10 is dug. It has a pedestal 42 that can be fixed as possible. The two receiving dies 41 and 41 are arranged so that the grooves (not shown) are linear, and are separated from each other according to the length of the outer pipe 10. Then, each of the two receiving dies 41 and 41 is pivotally fixed to the pedestal 42 at an end opposite to the end facing the other receiving die 41.

The shaft stop positions of the two receiving dies 41 and 41 are arranged at positions overlapping in the radial direction of the insertion portion 101 of the outer tube 10 arranged in the groove (not shown). That is, the outer pipe 10 is set so as to straddle the shaft stop positions of the two receiving dies 41 and 41. Further, the outer pipe 10 is set in the two receiving dies 41 and 41 in a state where the extending directions of the grooves (not shown) of the two receiving dies 41 and 41 are in the horizontal direction. That is, the outer pipe 10 is set in the two receiving dies 41, 41 in a state where the axial direction is along the extending direction of the grooves (not shown) of the two receiving dies 41, 41.

As shown in FIG. 7, a slide 5 having a curved surface presses the relay portion 102 against the outer tube 10 set in the press die 4. The two receiving dies 41 and 41 rotate around the shaft stop position by pressing the slide 5. As a result, both ends of the outer pipe 10 are supported by the shaft stop positions of the two receiving dies 41 and 41, and the relay portion 102 bends according to the curved surface of the slide 5 as the receiving dies 41 rotate. Will be done. As a result, the bent portion 103 is formed, and the connecting member 1 is manufactured.

The reinforcing member 201 is preferably formed with an outer diameter of 0.99 times or less and 0.85 times or more that of the insertion portion 101 and the relay portion 102. Since the reinforcing member 201 is formed with an outer diameter of 0.99 times or less that of the insertion portion 101 and the relay portion 102, the inner pipe 20 (reinforcing member 201) is attached to the outer pipe 10 (insertion portion 101 and relay portion 102). Can be easily inserted. Further, since the reinforcing member 201 is formed with an outer diameter of 0.85 times or more that of the insertion portion 101 and the relay portion 102, the inner peripheral surface and the inner surface of the relay portion 102 are formed when the relay portion 102 is bent. The outer peripheral surface of the pipe 20 (reinforcing member 201) comes into contact with the outer peripheral surface. As a result, the inner peripheral surface of the relay portion 102 may move with respect to the outer peripheral surface of the inner pipe 20 (reinforcing member 201) unless the friction with the outer peripheral surface of the inner pipe 20 (reinforcing member 201) is overcome. Can not. As a result, the body portion 104 (relay portion 102 and reinforcing member 201) is less likely to be deformed (buckled). Therefore, the load capacity against deformation (buckling) of the connecting member 1 as a whole can be increased.

Next, an embodiment and a comparative example of the connecting member 1 according to the present embodiment will be described.
A bending test was performed on the connecting member of the comparative example formed of a single pipe (outer pipe only) and the connecting member 1 of the double pipe structure (outer pipe 10 and inner pipe 20) according to Examples 1 and 2. carried out. As the connecting member 1 of the double pipe structure (outer pipe 10 and inner pipe 20), two types of reinforcing members 201 (inner pipe 20) having different plate thicknesses were prepared. Table 1 below shows the materials and outer diameters of the connecting members used in the test. The outer pipe had a length of 250 mm, and the reinforcing member 201 (inner pipe 20) had a length of 30 mm.

Insert each of a pair of steel materials (tubular members) having the same diameter and material as the pair of arch members 2 and 2 into the outer pipe from the insertion portion into the insertion portions of the connecting members of Examples 1 and 2 and the comparative examples prepared. Then, each of the connecting member (outer pipe) and the pair of steel materials (tubular member) was TIG welded (four places in the circumferential direction) so as not to fall off. Then, as shown in FIG. 8, using a strength test device (manufactured by Shimadzu Corporation, Autograph AG-E), the center (bent portion) of the connecting member is supported at one point R1, and a pair of steel materials (tubular members) are supported. ), A force was applied in the direction of bending the bent portion at one point R2 (a distance of 340 mm). The test speed was 5 m / min and the test was performed 3 times.

As a result, as shown in FIG. 8, it was found that the test load did not change significantly when the stroke exceeded 5 mm, and each of the three connecting members buckled. At this point, the test load of the connecting member 1 according to the second embodiment in which the plate thickness of the reinforcing member 201 (inner pipe 20) is 2.0 mm is the largest, and then the plate thickness of the reinforcing member 201 (inner pipe 20) is increased. It was found that the test load of the connecting member 1 according to Example 1 of 1.2 mm was large. Then, it was found that the test load of the connecting member of the single pipe according to the comparative example was the smallest. Since the magnitude of the test load is the magnitude of the withstand load, it was found that the withstand load of the double pipe connecting member 1 according to Examples 1 and 2 is larger than that of the single pipe connecting member of the comparative example. ..

According to the connecting member 1 of one embodiment described above, the following effects are obtained.

(1) A pair of insertion portions 101, 101 in which connecting members 1 for connecting a pair of arch members 2 and 2 used in a vinyl house are provided at both ends and openings into which each of the arch members 2 can be inserted are formed. And the body portion 104, which is provided so as to connect the insertion portion 101 and has a thicker wall thickness (plate thickness) than the insertion portion 101, is included. As a result, the arch member 2 inserted into the insertion portion 101 can be locked in a state of being in contact with the body portion 104. Therefore, by contacting the body portion 104, the arch member 2 slides with respect to the insertion portion 101. Be prevented. Therefore, it is possible to prevent the connecting member 1 from being deformed due to the sliding of the arch member 2. Further, since the connecting member 1 can be reinforced against the force applied to the arch member 2 by wind, snow, or the like, buckling of the connecting member 1 can be prevented.

(2) The body portion 104 is arranged inside the tubular relay portion 102 formed integrally with the insertion portion 101 and the relay portion 102, and is shorter than the combined length of the insertion portion and the relay portion. It was configured to include 201 and. As a result, the connecting member 1 can be easily manufactured by inserting the reinforcing member 201 from the inserting portion 101 and arranging the reinforcing member 201 at a position overlapping the relay portion 102.

(3) The reinforcing member 201 was formed by using a material having a yield strength larger than that of the relay portion 102. As a result, the weight can be reduced while maintaining the strength of the connecting member 1.

(4) A bent portion 103 is provided on the body portion 104. As a result, the bent portion 103 can prevent the reinforcing member 201 arranged so as to overlap the relay portion 102 from moving in the axial direction. Since the reinforcing member 201 can be positioned only by the bent portion 103, the connecting member 1 can be easily manufactured without separately requiring a member for positioning.

(5) The length of the reinforcing member 201 is formed to be longer than the outer diameter of the reinforcing member 201. As a result, a sufficient length of the reinforcing member 201 can be secured, so that the bent portion 103 can be easily formed at the position of the relay portion 102 overlapping the reinforcing member 201 without precisely determining the forming position of the bent portion 103. it can.

(6) The pair of arch members 2 and 2 were connected by inserting the respective ends of the pair of arch members 2 and 2 through the opening of the insertion portion 101. As a result, the connecting member 1 can connect the pair of arch members 2 and 2 even if the pair of arch members 2 and 2 are only inserted into the connecting member 1.

(7) The end of the arch member 2 is brought into contact with the body portion 104 to restrict further insertion of the arch member 2. As a result, the arch member 2 does not slide inside the insertion portion 101, so that the deformation of the connecting member 1 can be prevented.

Although the preferred embodiment of the connecting member of the present invention has been described above, the present invention is not limited to the above-described embodiment and can be appropriately modified.

For example, the reinforcing member 201 may be formed with an outer diameter and an inner diameter substantially the same as the outer diameter and the inner diameter of the arch member 2. As a result, the reinforcing member 201 can be manufactured by diverting the arch member 2, so that the manufacturing cost can be suppressed. The arch member 2 may be a solid strut member formed in an arch shape.

Further, the dimensions of the connecting member 1 and the dimensions of the arch member 2 are not limited to the above dimensions, and can be specified, for example, as shown in Table 2 below, and the connecting member 1 having any diameter can be used. ..

Further, in the above embodiment, the connecting member 1 has been described as having the bent portion 103, but the connecting member 1 may have a structure having no bent portion 103. That is, the connecting member 1 may have a straight pipe structure.

Further, in the above embodiment, the reinforcing member 201 has been described as a tubular shape. On the other hand, the reinforcing member 201 may be formed in the shape of a solid rod. Along with this, the inner pipe 20 (reinforcing member 201) is inserted into the outer pipe 10 and then bent, but concrete may be poured into the previously bent outer pipe 10 to form the reinforcing member 201.

Further, in the above embodiment, the body portion 104 is described as a separate body by forming the relay portion 102 and the reinforcing member 201. Not limited to this, the connecting member 1 may be formed by integrally molding the insertion portion 101, the relay portion 102, and the reinforcing member 201.

1 Connecting member 2, 2 (a), 2 (b) Arch member 4 Press mold 5 Slide 10 Outer pipe 20 Inner pipe 41 Receiving mold 42 Pedestal 101 Insertion part 102 Relay part 103 Bending part 104 Body part 201 Reinforcing member

Claims (7)

It is a connecting member that connects a pair of arch members used in a vinyl house.
A pair of insertion portions provided at both ends and having openings into which each of the arch members can be inserted,
It is provided so as to connect the pair of insertion portions, and includes a body portion thicker than the insertion portion.
The body is
A tubular relay portion formed integrally with the insertion portion and
Reinforcing members arranged inside the relay unit and
The reinforcing member has a bent portion positioned by bending at a position where the reinforcing member overlaps the relay portion .
A connecting member that restricts further insertion of the arch member by bringing the end of the arch member into contact with the end of the reinforcing member. The connecting member according to claim 1, wherein the insertion portion has a length of 2 to 2.5 times the outer diameter of the arch member to be connected. The outer diameter of the arch member is substantially the same as the outer diameter of the reinforcing member.
The outer diameter of the reinforcing member is 0.99 times or less and 0.85 times or more the inner diameter of the relay portion.
The inner diameter of the relay unit, connecting member according to claim 2 Ru der substantially the same as the inner diameter of the insertion portion. The connecting member according to any one of claims 1 to 3, wherein the reinforcing member is formed by using a material having a yield strength larger than that of the relay portion. The connecting member according to any one of claims 1 to 4, wherein the reinforcing member is formed with an outer diameter and an inner diameter substantially the same as the outer diameter and the inner diameter of the arch member. The connecting member according to any one of claims 1 to 5, wherein the length of the reinforcing member is a length equal to or larger than the outer diameter of the reinforcing member. It is a method of using a connecting member that connects a pair of arch members used in a vinyl house.
The connecting member
A pair of insertion portions provided at both ends thereof and having openings into which each of the arch members can be inserted,
It is provided so as to connect the pair of insertion portions, and includes a body portion thicker than the insertion portion.
The body is
A tubular relay portion formed integrally with the insertion portion and
Reinforcing members arranged inside the relay unit and
The reinforcing member has a bent portion positioned by bending at a position where the reinforcing member overlaps the relay portion .
The end of the arch member is inserted into the insertion portion and
A method of using a connecting member that restricts further insertion of the arch member by bringing the end of the arch member into contact with the end of the reinforcing member.

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