JP6008906B2 - Enclosure structure - Google Patents

Description

  The present invention connects a large number of plate-shaped surrounding members in a juxtaposed state, and bends at a connecting portion between one end of one adjacent plate-shaped surrounding member and the opposite end of the other plate-shaped surrounding member. Thus, the present invention relates to a surrounding structure that can be folded and stored.

  For example, many enclosure structures configured as a stove draft shield used outdoors such as camping can be folded and stored so that they can be carried together with a stove. Generally, a plate-like enclosure member using a hinge is used. It is the structure which connected each other.

  However, when the conventional surrounding structure in which the plate-like surrounding members are connected using this hinge is provided with a bending restricting mechanism for restricting bending at a predetermined bending angle or more to form a predetermined surrounding shape, This folding restriction mechanism cannot be provided because it cannot be folded and stored compactly. Therefore, the surrounding structure cannot be easily formed into a predetermined surrounding shape, or the holding of the surrounding shape is difficult and slight contact occurs. There was a problem that the enclosure shape collapsed immediately.

  In addition, in order to solve such problems, when a folding restriction mechanism is provided, the folding restriction mechanism can not be folded and stored compactly, and even if it can be folded, it can only be folded in half. There was a problem of not being in a compact storage state and reducing portability.

  That is, conventionally, there has been no enclosure structure that is provided with a bending restricting mechanism and can easily hold a predetermined shape, and can be folded and stored compactly.

  The present invention has been made in view of such a situation, and includes a bending restriction mechanism, which can be easily formed into a predetermined surrounding shape, and the formed surrounding shape is not easily collapsed, and is compactly folded and stored. It is an object of the present invention to provide an epoch-making enclosure structure excellent in practicality and portability.

  The gist of the present invention will be described with reference to the accompanying drawings.

Numerous plate-like enclosure 1 is disposed in juxtaposition state, each said plate-like enclosure arranged has been each said plate-like enclosure 1 through the cord body 3 for tightening the through-hole 2 provided in the 1 is connected, at one end and the other plate-like enclosure 1 on the opposite end and the surrounding structure configured to freely bent to folded accommodating a connecting portion 4 of the one plate-like enclosure 1 adjacent there are a coupling engagement portion 5 provided on one one side end portion of the plate-like enclosure 1 adjacent a coupling engaging portion 6 provided at the opposite end of the other plate-like enclosure 1 There folding regulating mechanism 18 to cause bending regulating effect of preventing the bending polymerization onto one side to prevent at least a predetermined bending angle more bending of the connecting portion 4 in connection engaged is provided, each said plate-like enclosure 1 is tightening how the tightening for the cords 3 in Rukoto tightens said tightening for the cords 3 The opposite direction to be swept, the coupling engagement portion 5 and the connecting engagement said predetermined by bending regulating action occurs the bent of the engaging portion 6 and is a consolidated engaged the folding regulating mechanism 18 is formed in a shape, is configured so as to accommodating the folding and bending at the connecting portion 4 in a state where at least the tightening for the cords 3 are loosened, the bending regulating mechanism 18, the plate-like enclosure 1 The connecting and engaging portion 5 formed by bending and projecting one side end portion in the juxtaposed direction, and the regulation projection formed by bending and projecting the end portion on the opposite side of the plate-like surrounding member 1 in the juxtaposed direction A portion 7 and the coupling engaging portion 6 provided adjacent to the restricting protruding portion 7,
When the connection portion 4 is bent to the one side in a state where the connection engagement portion 5 and the connection engagement portion 6 are engaged, the connection engagement portion 5 or the restricting protrusion 7 is the plate shape. A configuration in which the bending restricting action of restricting the adjacent plate-like surrounding members 1 to bend to the one side by a predetermined bending angle or more is caused by abutting against the receiving portion 8 provided in the surrounding member 1; The present invention relates to an enclosing structure characterized in that:

Further, the bending restricting mechanism 18 is configured such that when the tightening cord body 3 is tightened and a large number of the plate-shaped surrounding members 1 are pushed in the opposite direction, the connection locking portion 5 and the connection engagement portion 6 and engages, is configured to be capable of accommodating the folding by polymerizing bending is to each of said plate-like surrounds the member 1 is regulated to be folded over a predetermined folding angle to one side and the opposite side of the one side in Rukoto loosened said tightening for the cords 3, the opposite or folded to be polymerized each plate enclosure 1 that Do easier than state of tightening the tightening for cords 3 to the those of the surrounding structure of claim 1, wherein a is a bent polymerization also that Do freely configuration to the folding regulating action is also lost the one side to said one side.

In addition, the bending restricting mechanism 18 is configured as the connection engaging portion 6 with which the connection engaging portion 5 engages a recess provided adjacent to the restriction projecting portion 7. When the connecting portion 4 is bent to the one side with the connecting engaging portion 6 engaged with the concave and convex portions, the connecting locking portion 5 or the restricting protruding portion 7 is provided on the plate-shaped surrounding member 1. by abuts the receiving portion 8, and characterized by being configured to the bending regulating effect that the plate-like enclosure 1 adjacent to bending than the predetermined bending angle to said one side is regulated arising The enclosure structure according to any one of claims 1 and 2.

Further, the plate-like enclosure 1 located at the end opposite to the tightening direction of the tightening for cords 3 of the plate-like enclosure 1, which is a number connected to the parallel arrangement state, the tightening for the cords 3 One end portion is fixed or latched or the middle of the tightening cord body 3 is folded back and locked to the plate-like surrounding member 1 located at the end of the tightening cord body 3 on the tightening direction side. enclosed structure according to any one of claims 1 to 3, characterized in that tightening the retaining engagement portion 9 for holding engagement locks the tightened state withdrawal end 3A of the use cords 3 are provided It is related to.

  Since the present invention is configured as described above, it can be folded and stored in a compact manner, but simply tightens the tightening cord body and pushes each plate-shaped surrounding member to the side opposite to the tightening direction of the tightening cord body. With the extremely simple operation, the bending restricting function of the bending restricting mechanism becomes effective and can be easily formed into a predetermined bent shape (enclosed shape). On the other hand, rigidity is exhibited, and the formed bent shape (enclosed shape) is less likely to be collapsed, so that it becomes an epoch-making enclosed structure excellent in practicality and portability that can maintain a stable enclosed state. .

It is a front side perspective view which shows the state which loosened the string for a tightening of a present Example. It is a back side perspective view which shows the state which loosened the string for tightening of a present Example. It is a front view which shows the plate-shaped surrounding member of a present Example. It is a top view which shows the plate-shaped surrounding member of a present Example. It is a front side perspective view which shows the state which tightened the string body for a tightening of a present Example. It is a back side perspective view which shows the state which tightened the string body for a tightening of a present Example. It is explanatory drawing which shows the state of the connection part of the adjacent plate-shaped surrounding members of a present Example. It is a perspective view which shows the state which formed the present Example in the enclosure shape. It is a top view which shows the state which formed the present Example in the enclosure shape. It is a figure which shows the state which folds and stores a present Example, and a foldable storage state. It is a perspective view which shows the use condition of a present Example.

  An embodiment of the present invention which is considered to be suitable will be briefly described with reference to the drawings showing the operation of the present invention.

  When the tightening cords 3 are tightened and the respective plate-like surrounding members 1 are pushed in the direction opposite to the tightening direction of the tightening cords 3, one adjacent plate-like surrounding members of the plate-like surrounding members 1 arranged side by side are arranged. One connection locking portion 5 and the connection engagement portion 6 of the other plate-shaped surrounding member 1 are in an engaged state, and the bending restriction mechanism 18 is activated and a bending restriction action occurs.

  Accordingly, when a large number of plate-shaped surrounding members 1 pushed toward one side by tightening of the tightening string body 3 are bent to one side, a bending restricting action is generated, and the bending at the connecting portion 4 is more than a predetermined bending angle. Is prevented, and it is easily formed into a predetermined curved shape (enclosed shape).

  In addition, in this encircled state, rigidity is exerted with respect to the enclosing direction (the one side) by the bending restricting action, and the formed enclosing shape is not easily broken (held).

  Further, when the tightening string 3 is loosened, the above-described pushing state toward the one side of the plate-shaped surrounding member 1 is released, and for example, the connection locking portion 5 of the adjacent one of the plate-shaped surrounding members 1 and the other The engagement state of the plate-shaped surrounding member 1 with the connection engaging portion 6 is released, and the connection portion 4 between the adjacent plate-shaped surrounding members 1 can be easily bent, for example, wound in one direction. It can be folded or folded into a zigzag folded state and folded and stored in the storage state of the size of the single plate-shaped surrounding member 1, resulting in a compact storage state that is easy to carry.

  As described above, the present invention is configured to be compactly folded and housed, but simply tightens the tightening cord body 3 and pushes each plate-shaped surrounding member 1 in a direction opposite to the tightening direction of the tightening cord body 3. With the extremely simple operation, the bending restricting mechanism 18 is activated and a bending restricting action is generated at the time of folding, so that it can be easily formed into a predetermined enclosing shape. Rigidity is exerted with respect to the direction, and the formed surrounding shape is an epoch-making surrounding structure excellent in practicality and portability that can maintain a stable surrounding state in which it is difficult to collapse.

  Specific embodiments of the present invention will be described with reference to the drawings.

  In the present embodiment, a large number of plate-shaped surrounding members 1 are arranged in parallel, and a tightening string 3 is disposed in a through hole 2 provided in each plate-shaped surrounding member 1 so that each plate-shaped surrounding member is provided. 1 is connected and bent at a connecting portion 4 between one end portion of one adjacent plate-like surrounding member 1 and the opposite end portion of the other plate-like surrounding member 1 so as to be folded and housed. A connection locking portion 5 provided at one end of one adjacent plate-shaped surrounding member 1 and a connection engaging portion 6 provided at the opposite end of the other plate-shaped surrounding member 1. In the engaged state, a bending restricting mechanism 18 for preventing a bend of at least a predetermined bending angle and preventing a bend polymerization to one side is provided, and the tightening string 3 is tightened. Thus, each plate-shaped surrounding member 1 is pushed in the direction opposite to the tightening direction of the tightening string 3 and the connection locking portion 5 and the front It is configured to be in a connected state in which the connection engaging portion 6 is engaged, and is configured to be formed into a predetermined bent shape by causing the bending restriction action of the bending restriction mechanism 18, and at least the tightening string In the state where the body 3 is loosened, it is configured to be folded and stored at the connecting portion 4.

  Specifically, when the tightening string body 3 is tightened and a large number of plate-shaped surrounding members 1 are pushed in the direction opposite to the tightening direction of the tightening string body 3, the connection locking portion 5 and the connection engagement portion 6 Are engaged, and the folding of each plate-like enclosing member 1 to one side (inner side or outer side) by a predetermined folding angle or more is restricted, and the opposite side of one side is folded so that it can be folded and stored. By constituting the bending restricting mechanism 18 and loosening the tightening cord body 3, it is easier to fold the plate-like surrounding members 1 by bending to the opposite side than in the state where the tightening cord body 3 is tightened. In addition, it is configured such that the bending restriction action on one side is lost and the bending polymerization on one side is also free.

  This embodiment is a case where the above-described surrounding structure of the present invention is configured as the wind barrier material 11 of the gas stove 10 used in outdoor activities such as camping as shown in FIG.

  Hereinafter, each component according to the present embodiment will be described in detail.

  As shown in FIGS. 1 and 2, the windshield material 11 of this embodiment is formed by connecting a large number of plate-shaped surrounding members 1 having the same shape in a juxtaposed manner.

  Specifically, the plate-shaped surrounding member 1 is made of a metal thin plate member, is formed in a square shape as shown in FIG. In this embodiment, the connection locking portion 5 is provided at the left end portion and the connection engagement portion 6 is provided at the opposite end portion (right end portion).

  More specifically, as shown in FIG. 4, the connection locking portion 5 has a belt-like protruding piece formed at a substantially central portion of the left end portion of the plate-like surrounding member 1 on the back side of the plate-like surrounding member 1 (wind The barrier material 11 is formed to bend and project at a predetermined angle toward the inner side when the barrier material 11 is formed in a surrounding shape.

  Further, the connection engaging portion 6 is formed in a concave shape that engages with the convex connection locking portion 5 described above, and specifically, the upper side and the lower side of the right end portion of the plate-shaped surrounding member 1. The strip-shaped projecting piece formed on the side is directed in the same direction as the connection locking portion 5, that is, toward the back side of the plate-shaped surrounding member 1 (inside when the windshield material 11 is formed in a surrounding shape) as shown in FIG. The restricting protrusion 7 is formed by bending and projecting at a predetermined angle, and the concavity between the restricting protrusions 7 provided at intervals in the vertical direction is used as the coupling engaging portion 6.

  Moreover, the plate-shaped surrounding member 1 of the present embodiment has a configuration in which a receiving portion 8 is provided in which the restricting protruding portion 7 of the other plate-shaped surrounding member 1 abuts and is locked. 3, the plate-like surrounding member 1 is provided at the end of the plate surface of the plate-like surrounding member 1 on the side where the connection locking portion 5 is provided.

  In this embodiment, the connection locking portion 5, the connection engagement portion 6, the restriction protrusion 7 and the receiving portion 8 constitute a bending restriction mechanism 18, and the connection locking portion 5 and the connection engagement portion 6 are connected to each other. In the engagement state, specifically, in the engagement state between the connection locking portion 5 of one plate-shaped surrounding member 1 and the connection engagement portion 6 of the other plate-shaped surrounding member 1 in the adjacent plate-shaped surrounding members 1, In the case of the present embodiment, one side of the windshield material 11, the windshield wall material 11 is bent on the back surface side of the plate-shaped surrounding member 1 at the connection portion 4 where each of the connection locking portions 5 and the connection engagement portions 6 are engaged. By doing so, the bending restricting action of the bending restricting mechanism 18 in which the connecting and engaging portion 5 and the restricting protruding portion 7 abut against the receiving portion 8 and are prevented from being bent occurs.

  Further, the plate-shaped surrounding member 1 of the present embodiment includes a tightening string 3 disposed through the plate-shaped surrounding member 1 in each of the connection locking portion 5 and the restricting protruding portion 7 as shown in FIG. The engaging notch 12 is recessed, and when the windshield material 11 is folded and stored, the tightening string 3 is stored in the notch 12 and the tightening string 3 is notched. Guided by the section 12, the tightening string 3 is not displaced and can be folded and stored neatly.

  Furthermore, the plate-shaped surrounding member 1 of the present embodiment has a configuration in which a latching portion 14 that can detachably latch the distal end portion of the five virtue portions 13 of the gas stove 10 is provided in the upper and lower ends.

  Specifically, in this embodiment, a long groove latching portion 14A formed in a long groove shape is provided at the center of the upper edge of the plate-shaped surrounding member 1, and a short groove latching portion formed in a short groove shape at the center of the lower edge. 14B is provided, and when it is desired to lower the position of the five virtues 13, it is hung on the long groove hooking part 14A provided at the upper edge, and when it is desired to raise the position of the five virtues 13, the windbreak wall of this embodiment The material 11 is turned upside down so that the short groove hooking portion 14B provided at the lower edge becomes the upper edge so as to be hooked on the short groove hooking portion 14B. In addition, FIG. 11 has shown the state which latched the five virtue parts 13 on the long groove latching | locking part 14A.

  Furthermore, the plate-shaped surrounding member 1 of the present embodiment has a configuration in which a through hole 2 is provided. Specifically, the through-hole 2 includes the left and right end portions of the plate-shaped surrounding member 1 and the left-right direction (width direction). Provided near the center, closer to the upper and lower sides than the center in the vertical direction (height direction), and the tightening string 3 is installed on the upper and lower sides with the center in the height direction as a boundary. It is set as the structure which can be arrange | positioned through.

  Further, the plate-shaped surrounding member 1 of the present embodiment has a structure in which a vent hole 15 is provided on the plate surface as shown in FIG. 11, and this vent hole 15 is surrounded by a wind barrier material 11 when the gas stove 10 is used. This is provided for the purpose of preventing incomplete combustion by flowing air from the outside.

  In the present embodiment, a large number (seven in this embodiment) of the plate-shaped surrounding members 1 configured as described above are arranged in a juxtaposed state, and the through holes of the plate-like enclosing members 1 arranged in the juxtaposed state are provided. The plate-like surrounding members 1 are connected to each other by passing the tightening string 3 through 2.

  Specifically, the present embodiment employs a metal wire 3 as the tightening string 3, and this metal wire 3 is a plate-shaped enclosure located on one end side of the windshield member 11 as shown in FIG. 1. A windshield is provided by passing through the through-hole 2 near the upper side or the lower side of the member 1 alternately on the front and back (alternately on the front side and the back side) with respect to the plate surface of the plate-like surrounding member 1. Metal that extends back from the plate-shaped surrounding member 1 located on the one end side by folding back and back alternately on the plate-shaped surrounding member 1 located on the other end side of the material 11 Both ends of the manufactured wire 3 are connected by a caulking member or the like to form a loop and are provided in a retaining state.

  Further, in the present embodiment, a handle 16 is provided at the folded portion of the metal wire 3 that is disposed in the thread, and when the metal wire 3 is tightened, the handle 16 is pulled as a pulling operation portion so as to be opposed vertically. The two metal wires 3 are configured so as to be evenly tightened.

  Furthermore, in this embodiment, a tightening holding locking portion 9 is provided on the front side plate surface of the plate-like surrounding member 1 located at the end of the windshield wall 11 on the side where the handle 16 is provided. By locking the pulling end 3A of the metal wire 3 pulled out from the plate-like surrounding member 1 by tightening to the holding locking portion 9, the tightening state is maintained without loosening the metal wire 3.

  Specifically, in the present embodiment, a gap having a diameter smaller than the diameter (thickness) of the metal wire 3 is formed between the vertically long belt-like locking plate 17 and at least the upper and lower portions thereof and the plate surface of the plate-shaped surrounding member 1. It is attached so as to intervene, and a clearance generated between the upper and lower portions of the locking plate 17 and the plate surface of the plate-shaped surrounding member 1 is used as a tightening holding locking portion 9, and this tightening holding locking portion. 9 is configured such that the drawing end 3A of the metal wire 3 is press-fitted and locked so that the tightened state can be maintained.

  In addition, although the present Example set it as the structure which carried out the arrangement | positioning by arrange | positioning one metal wire 3 and passing through each plate-shaped surrounding member 1, it uses two metal wires 3, and each metal wire It is good also as a structure which has arrange | positioned 3 to the plate-shaped surrounding member 1 in the retaining state, respectively.

  The operation and effect of the present embodiment configured as described above will be described below.

  When the windshield wall member 11 of the present embodiment is formed in a predetermined surrounding shape, specifically, a C-shaped (or an annular shape in plan view) surrounding shape, the handle 16 is operated by pulling as shown in FIGS. Then, the metal wire 3 is tightened, and each plate-shaped surrounding member 1 is pushed toward one side of the direction opposite to the tightening direction of the metal wire 3.

  By the tightening operation of the metal wire 3, the adjacent plate-shaped surrounding members 1 of the respective plate-shaped surrounding members 1 forming the windshield material 11 as shown in FIG. From the state of being indirectly connected via a slack (relaxed state), adjacent plate-shaped surrounding members 1 as shown in FIG. 7B are directly connected to each other, and one adjacent plate-shaped surrounding member 1 is connected. And the connection engaging portion 6 of the other plate-shaped surrounding member 1 are in an engaged state (tightened state), the bending restricting mechanism 18 is in an effective state, and a bending restricting action occurs. Become.

  As shown in FIG. 7 (c), when the connecting portion 4 to which the plate-like surrounding members 1 of the windshield wall member 11 in the connected state in which the bending restricting mechanism 18 is in an effective state is connected to the back side, the connecting portion 4 is bent. Each of the plate-shaped members as shown in FIGS. 8 and 9 is produced by a bending restricting action in which the connecting latching portion 5 and the restricting protruding portion 7 abut against the receiving portion 8 of the adjacent plate-like surrounding member 1 to restrict the bending. It becomes the windshield material 11 which exhibits the enveloping shape of planar view C shape which the surrounding members 1 connected at a predetermined angle.

  Further, when formed in this enclosing shape, the windshield material 11 exhibits rigidity in the enclosing direction due to the bending restriction action, and the formed enclosing shape is not easily collapsed, and the enclosing shape is well maintained. The

  Further, when the windshield wall member 11 is folded and stored, the metal wire 3 as shown in FIGS. 1 and 2 is loosened to release the pressing state of the plate-shaped surrounding member 1 toward one side and adjacent to each other. When the engagement state between the connection locking portion 5 of one plate-shaped surrounding member 1 and the connection engagement portion 6 of the other plate-shaped surrounding member 1 is released, the connection portions 4 of the plate-shaped surrounding members 1 can be bent freely. It is formed by the metal wire 3, and therefore can be easily bent at the connecting portion 4 between the adjacent plate-shaped surrounding members 1, and is folded so as to be wound in one direction as shown in FIG. 10 (b) can be folded and stored in the storage state of the size of the single plate-like surrounding member 1, and a compact storage state that is easy to carry is obtained.

  As described above, the windshield member 11 of the present embodiment has a configuration that can be folded and stored in a compact manner, but simply tightens the metal wire 3 (tightening cord body 3), and each plate-shaped surrounding member 1 is connected to the metal wire. The connecting and engaging portions 5 and the restricting protrusions 7 provided on each plate-like enclosing member 1 are brought into contact with the receiving portions 8 and locked by a very simple operation that only pushes them to one side opposite to the tightening direction 3. Since the bending restricting mechanism 18 that prevents bending over an angle is in an effective state and a bending restricting action occurs, it can be easily formed into a predetermined surrounding shape (C shape in plan view). Rigidity is exhibited with respect to the enclosing direction by the bending restricting action, and this makes the epoch-making windshield material 11 excellent in practicality and portability capable of maintaining a stable enclosing state in which the shape is not easily collapsed.

  In addition, since the present embodiment has a very simple configuration in which the plate-shaped surrounding members 1 having the same shape are simply arranged by connecting through the metal wires 3, a conventional hinge, a screw for attaching the hinge, etc. Therefore, it is possible to manufacture easily with a small number of parts, and it is an epoch-making enclosure structure that exhibits excellent productivity at low cost.

  Note that the present invention is not limited to this embodiment, and the specific configuration of each component can be designed as appropriate.

DESCRIPTION OF SYMBOLS 1 Plate-shaped surrounding member 2 Through-hole 3 Tightening string 3A Pull-out end 4 Connection part 5 Connection latching part 6 Connection engaging part 7 Restriction protrusion part 8 Receiving part 9 Tightening holding latch part
18 Bending control mechanism

Claims (4)

Numerous plate-like enclosing member is disposed in juxtaposition state, cord body for tightening the through holes provided in each of said plate-shaped enclosing member is disposed through and each said plate-like enclosing member is connected, adjacent An enclosing structure that is configured to be foldable and foldable at a connecting portion between one end of one plate-like enclosing member and the opposite end of the other plate-like enclosing member, and is adjacent to one plate a coupling engagement portion provided on one end of the Jo enclosing member, at least of the connecting portion in a connected state in which the coupling engagement portion provided on the opposite end is engaged in the other plate-like enclosure given a bending angle more bending prevents provided with folding regulating mechanism to cause the bending regulating effect of preventing the bending polymerization onto one side, each said plate in Rukoto tightened the tightening for the cords is Jo enclosing members is swept in a direction opposite to the tightening direction of the tightening for the cords, the communication The engaging portion and the connecting engagement portion is formed in a predetermined song molded shape by the bending regulations action of the bending regulating mechanism is a coupling engaged occurs, the cords are for at least the tightening in relaxed state is configured to be capable of accommodating the folding and bending at the connecting portion, the bending regulating mechanism is formed an arrangement direction one end of the plate-shaped enclosing member is protruded bent Further, the connection locking portion, a regulation protrusion formed by bending and projecting the opposite end of the plate-shaped surrounding member in the parallel direction, and the connection engagement provided adjacent to the regulation projection And when the connecting portion is bent to the one side in a state where the connecting engaging portion and the connecting engaging portion are engaged, the connecting engaging portion or the restricting protruding portion is Adjacent plate-like enclosures by abutting against receiving portions provided on the plate-like enclosure members Enclosing structure, wherein the wood that is bent more than a predetermined bending angle to said one side is configured to the bending regulating action is restricted occurs. In the bending restricting mechanism, when the tightening string body is tightened and a large number of the plate-like surrounding members are pushed in the opposite direction, the connection locking portion and the connection engagement portion are engaged, is to each said plate-like enclosing member is regulated to be folded over a predetermined folding angle to one side and the opposite side of the one side is configured to be capable of accommodating the folding by polymerizing bent, the cords are loosened for the tightening is in Rukoto, the bending regulating action have lost the also by bending to the side opposite to polymerize the respective plate enclosure that Do easier than state of tightening the tightening for the cords to the one side We have enclosed structure according to claim 1, wherein the folding polymerization also Do that the configuration and freely to the one side. In the bending restricting mechanism, a recess provided adjacent to the restricting protruding portion is used as the connection engaging portion with which the connection engaging portion engages, and the connection engaging portion and the connection engaging portion are provided. When the connecting portion is bent to the one side in a state of being engaged in a concave and convex manner, the connecting locking portion or the restricting protruding portion hits a receiving portion provided on the plate-shaped surrounding member, so that the adjacent plates Jo enclosing member according to any one of claims 1, 2, characterized in that to be folded over a predetermined folding angle to said one side is configured arising said bending regulating action is restricted Enclosure structure. A plate-shaped enclosure situated at the end opposite to the tightening direction of the tightening for the cords of the multiple coupled to juxtaposed state the plate enclosing member, fixed or leaves the end of the tightening for cords Stop and lock or turn back the middle of the tightening string body and lock the pull-out end of the tightening string body to the plate-like surrounding member located at the end of the tightening string body on the tightening direction side enclosed structure according to any one of claims 1 to 3, characterized in that tightening the retaining engagement portion for retaining the tightening condition is provided by.

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