Bellows-fold tent

Abstract

To secure workability at the time of assembly and transportation while improving the rigidity of a tent at the time of installation and stabilizing its posture.SOLUTION: A bellows-type folding tent 1 is provided with a plurality of portal frame bodies 2 and an expansion / contraction connection mechanism 4 which connects the adjacent portal frame bodies 2 to each other and is expandable / contractible in a connected state, wherein the portal frame body 2 has a ceiling part 5 and a pair of strut parts 6 foldably connected to both ends of the ceiling part 5, and each strut part 6 has a first strut 7 and a second strut 8 extending in parallel to each other, in the bellows-type folding tent in which both struts 7, 8 are mutually connected by one or a plurality of strut connecting members 9, either one strut 7 has a wheel 11 at a lower end, and the other strut 8 and the strut connecting member 9 are both detachably constituted.SELECTED DRAWING: Figure 9

Description

Technical Field

[0001] The present invention relates to a bellows-foldable tent.

Background Art

[0002] Conventionally, as this type of tent, there is known a bellows-foldable tent including a plurality of portal frames integrally having a ceiling portion and a pair of left and right support columns, and a telescopic connection mechanism for telescopically connecting the plurality of portal frames in the front-rear direction (see, for example, Patent Document 1). Since wheels that can be grounded are provided at the lower ends of the support columns of this tent, the telescopic operation of the tent can be performed easily and smoothly.

[0003] Also, as this type of tent, there has been proposed a bellows-foldable tent in which each support column is composed of two support columns, wheels are provided at the lower ends of the outer support columns, and jack bases are provided at the lower ends of the inner support columns (see Patent Document 2). By configuring each support column with two support columns in this way, the rigidity of the support column and thus the tent can be increased. Further, by providing wheels at the lower end of one support column and a jack base at the lower end of the other support column, it becomes possible to adjust the height of each portal frame forming the skeleton of the tent while ensuring a smooth telescopic operation of the tent.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0005] Thus, in this type of tent, by configuring each support column portion of the portal frame with two support columns, advantages such as improved rigidity of the tent or stabilization of the tent's posture through height adjustment can be enjoyed. On the other hand, compared with the case where each support column portion is configured with a single support column, the structure of the support column portion and thus the portal frame becomes more complex, which may hinder smooth folding or unfolding operations. Also, as the number of support columns increases, the weight of the tent increases, which may also deteriorate workability during loading onto or unloading from a truck.

[0006] In view of the above circumstances, the technical problem to be solved by the present invention is to provide a bellows-foldable tent that can ensure workability during assembly and transportation while improving the rigidity of the tent and stabilizing its posture during installation.

Means for Solving the Problem

[0007] The solution to the above problem is achieved by the bellows-foldable tent according to the present invention. That is, this tent includes a plurality of portal frames and a telescopic connection mechanism that connects adjacent portal frames and is telescopic in the connected state. The portal frame has a ceiling portion and a pair of support column portions that are foldably connected to both ends of the ceiling portion. Each support column portion has a first support column and a second support column that extend parallel to each other, and in the bellows-foldable tent where both support columns are interconnected by one or more support column connection members, one of the support columns has wheels at its lower end, and the other support column and the support column connection member are both configured to be detachable.

[0008] Thus, in the bellows-foldable tent according to the present invention, a wheel is provided at the lower end of either one of the pair of support columns constituting the support column portion, and both the other support column and the support column connecting member are configured to be detachable. By connecting the pair of support columns with the support column connecting member, the rigidity of the bellows-foldable tent can be improved and the posture during installation can be stabilized. Further, during transportation or assembly, the support column connecting member can be removed, and then, by removing the other support column from the ceiling portion, the structure of the support column portion can be simplified. Therefore, for example, it becomes possible to easily perform the folding operation or the deployment operation of the support column portion. Further, at this time, since a wheel is provided at the lower end of one of the support columns connected to the ceiling portion, the folding operation or the deployment operation of the support column portion accompanying the lifting of the ceiling portion can be smoothly performed. As described above, according to the bellows-foldable tent according to the present invention, it is possible to improve the rigidity of the tent during installation and stabilize the posture, while ensuring workability during assembly and transportation.

[0009] Further, the bellows-foldable tent according to the present invention may further include a seat body fixed to the ground surface by driving an anchor, and a tension adjustment mechanism that connects the lowermost support column connecting member among one or more support column connecting members to the seat body and adjusts the tension acting on each other.

[0010] In this way, by adopting a structure in which the support column connecting member that connects the support columns at the lowest position among one or more support column connecting members and the seat body fixed to the ground surface by driving an anchor are connected by a tension adjustment mechanism, the support column connecting member can be firmly fixed. Therefore, it becomes possible to further improve the rigidity of each support column and thus the tent and stabilize the posture. Further, by connecting the seat body fixed to the ground by driving an anchor and the support column connecting member with a tension adjustment mechanism, the seat body is fixed to the ground, and after lifting the portal frame body and deploying the other support column that can be folded, the tension between the support column connecting member and the seat body can be increased to a predetermined magnitude, so there is no risk of inhibiting good workability during assembly.

[0011] Further, in the bellows-type folding tent according to the present invention, fitting recesses may be provided in the first support column and the second support column, respectively, and a pair of fitting projections that can be fitted to the fitting recesses by a fitting operation from the upper end side to the lower end side of each support column may be provided on the support column connecting member.

[0012] According to the support column connection structure according to the above configuration, the support columns can be connected more simply. Further, since the fitting projection and the fitting recess can be fitted by a fitting operation from the upper end side to the lower end side of each support column, by applying a predetermined tension to the support column connecting member by the tension adjustment mechanism, the fitting state can be further strengthened. In addition, since the fitting state can be easily eliminated by hitting from below upward, there is no problem in terms of workability for removal.

[0013] Further, when having a pair of fitting projections, in the bellows-type tent according to the present invention, the pair of fitting projections may have a wedge shape and may be configured to be able to form a wedge engagement therebetween.

[0014] According to the above configuration, the connection state between the support column connecting member and each support column can be made stronger. Also, in the case of wedge engagement, it becomes possible to more easily eliminate the fitting state (wedge engagement state) by hitting the support column connecting member from below.

[0015] Further, when having a pair of fitting projections, in the bellows-type folding tent according to the present invention, an engaging portion that can be engaged with the tension adjustment mechanism in the vertical direction may be provided at an intermediate position between the pair of fitting projections of the support column connecting member.

[0016] When the support column fitting structure takes the above configuration, by applying a predetermined tension vertically downward by the tension adjustment mechanism, the tension or its reaction force acts evenly on the connection portion (fitting portion) between each support column and the support column connecting member. Therefore, it is possible to avoid a situation where a horizontal component of the tension acts on the support column connecting member and stabilize the posture of each support column and thus the posture of the tent.

[0017] Further, when having a pair of fitting convex portions, in the bellows-foldable tent according to the present invention, the column connecting member may have a plate shape.

[0018] By forming the column connecting member in a plate shape, a pair of fitting convex portions that form a part of the column connecting member and the engaging portion with the tension adjusting mechanism can be formed in a thin-walled shape. As a result, the position in the front-rear direction of the tension action point at the engaging portion can be kept constant. Therefore, also with this configuration, by applying tension vertically downward, it is possible to avoid a situation where a horizontal component of the tension acts on the column connecting member and stabilize the posture of the tent.

[0019] Further, in the bellows-foldable tent according to the present invention, the tension adjusting mechanism may be constituted by a turnbuckle.

[0020] By configuring the tension adjusting mechanism in this way, first, after connecting the seat body and the column connecting member with a turnbuckle, by turning the body portion of the turnbuckle in a predetermined direction, tension can be applied to the seat body and the column connecting member. Therefore, it is possible to easily attach and detach, and apply tension to the seat body and the column connecting member with a simple operation after attachment.

[0021] Further, in the bellows-foldable tent according to the present invention, the seat body has a seat body main body fixed to the ground surface and an engaged portion that can be engaged with an engaging portion provided on the tension adjusting mechanism, and the engaged portion is configured to be movable with respect to the seat body main body.

[0022] By configuring the seat body as described above, play can be provided between the seat body main body and the tension adjusting mechanism. Therefore, it becomes possible to more easily attach the tension adjusting mechanism to the seat body fixed to the ground surface by driving the anchor.

Advantages of the Invention

[0023] As described above, according to the bellows-foldable tent according to the present invention, it is possible to ensure workability during assembly and transportation while improving the rigidity of the tent and stabilizing the posture during installation.

Brief Description of the Drawings

[0024]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Modes for Carrying Out the Invention

[0025] Hereinafter, the content of the bellows-foldable tent according to an embodiment of the present invention will be described with reference to the drawings. In the following, the contraction direction of the bellows tent is the front-rear direction, the vertical direction is the up-down direction, and the direction orthogonal to the front-rear direction and the up-down direction is the left-right direction for explanation.

[0026] FIG. 1 is a front view of the bellows-foldable tent 1 according to the present embodiment as viewed from the front-rear direction, and FIGS. 2 and 3 are side views of the bellows-foldable tent 1 as viewed from the left-right direction, respectively. As shown in FIG. 1, this bellows-foldable tent 1 mainly includes a plurality of portal frames 2, a tent sheet 3, and a telescopic connection mechanism 4.

[0027] The portal frame 2 has a ceiling portion 5 and a pair of left and right support columns 6, 6 connected to both ends of the ceiling portion 5. Among these, the ceiling portion 5 has an arcuate roof member 5a and a beam member 5b connecting both ends of the roof member 5a. The roof member 5a is formed of, for example, a metal round pipe, and the beam member 5b is formed of a metal square pipe. Note that the roof member 5a can take any structure including known structures, and may be, for example, in a gable shape.

[0028] The pair of left and right support columns 6, 6 are connected to the ceiling portion 5 so as to be foldable. In the present embodiment, as shown in FIG. 5, each support column 6 is foldable inward (toward the center in the left-right direction). Each support column 6 has a first support column 7 and a second support column 8 extending parallel to each other, and both support columns 7, 8 are configured to be mutually connectable by one or a plurality of support column connection members 9. Each of the support columns 7, 8 is formed of, for example, a metal square pipe. The connection structure of the support columns 7, 8 will be described later.

[0029] As shown in FIG. 2, the telescopic connection mechanism 4 is configured to connect adjacent portal frames 2, 2 in the front-rear direction and be telescopic in the connected state. In the present embodiment, the telescopic connection mechanism 4 includes an interlocking telescopic mechanism 4A that is telescopic such that three or more adjacent portal frames 2 in the front-rear direction interlock to expand and contract the distance between them, and an independent telescopic mechanism 4B that expands and contracts the distance between two adjacent portal frames 2 independently without interlocking with the interlocking telescopic mechanism 4A.

[0030] The interlocking telescopic mechanism 4A and the independent telescopic mechanism 4B are such that the lower ends of the link bars 4a and 4b connected in an X shape are rotatably connected to the support column portion 6 (here, the first support column 7 located on the outside) of the adjacent portal frame body 2, and the upper ends of the link bars 4a and 4b are connected to the support column portion 6 so as to be vertically movable and rotatable. The lower ends of the link bars 4a and 4b rotate around the connecting shaft, and the upper ends of the link bars 4a and 4b rotate along the support column portion 6 while moving up and down, whereby the adjacent portal frame bodies 2 translate in a direction of approaching or separating. Thereby, the plurality of portal frame bodies 2 can be extended with the adjacent intervals expanding as shown in FIG. 2, and can be contracted with the adjacent intervals narrowing as shown in FIG. 3. Note that, for these interlocking telescopic mechanisms 4A and independent telescopic mechanisms 4B, telescopic mechanisms such as a ratchet mechanism or a pantograph mechanism may be used.

[0031] Also, in this interlocking telescopic mechanism 4A, as shown in FIG. 6, an eyebolt 4c is rotatably connected to the upper end portions of the link bars 4a and 4b. The eyebolt 4c is inserted into a guide bar 4d arranged along the longitudinal direction of the support column portion 6. In this case, the guide bar 4d is fixed to the first support column 7. The upper end portion of the link bar 4b of the X-shaped link 4A1 and the upper end portion of the link bar 4a of the X-shaped link 4A2 are rotatably connected via the eyebolt 4c. Also, the upper end portion of the link bar 4b of the X-shaped link 4A2 and the upper end portion of the link bar 4a of the X-shaped link 4A3 are also rotatably connected via the eyebolt 4c, and the upper end portion of the link bar 4b of the X-shaped link 4A3 and the upper end portion of the link bar 4a of the X-shaped link 4A4 are also rotatably connected via the eyebolt 4c. The lower end portion of the link bar 4a of the X-shaped link 4A1 and the lower end portion of the link bar 4b of the X-shaped link 4A2 are rotatably connected via a connecting shaft 4e fixed to the support column portion 6 (here, the first support column 7). Also, the lower end portion of the link bar 4a of the X-shaped link 4A2 and the lower end portion of the link bar 4b of the X-shaped link 4A3 are also rotatably connected via the connecting shaft 4e, and the lower end portion of the link bar 4a of the X-shaped link 4A3 and the lower end portion of the link bar 4b of the X-shaped link 4A4 are also rotatably connected via the connecting shaft 4e. By the interlocking telescopic mechanism 4A having the above-described configuration, the X-shaped links 4A1, 4A2, 4A3, and 4A4 can be extended and contracted in an interlocked manner.

[0032] The link bars 4a and 4b, which are cross-connected to the independent telescopic mechanism 4B, are not connected to the link bars 4a and 4b of the adjacent interlocking telescopic mechanism 4A. That is, as shown in FIG. 3, the lower ends of the link bars 4a and 4b of the independent telescopic mechanism 4B are rotatably connected to a flange 4f fixed to the support column portion 6 (here, the first support column 7), and the upper ends of the link bars 4a and 4b are connected to the vertical groove 4h of the guide plate 4g fixed to the support column portion 6 (here, the first support column 7) via a movable shaft 4i inserted therethrough, and are connected so as to be movable up and down and rotatable.

[0033] With the above configuration, the X-shaped link of the link bars 4a and 4b of the independent telescopic mechanism 4B can be telescoped independently of the X-shaped links 4A1 to 4A4 of the interlocking telescopic mechanism 4A, as shown in FIGS. 3 and 4 (see FIGS. 3 and 4). In the illustrated example, the independent telescopic mechanism 4B is provided on both the left and right sides of the interlocking telescopic mechanism 4A, but the independent telescopic mechanism 4B may be provided on either the left or right side of the interlocking telescopic mechanism 4A. Alternatively, a pair of interlocking telescopic mechanisms 4A may be provided on both the left and right sides of the independent telescopic mechanism 4B so as to be arranged contrary to the illustrated example.

[0034] In the present embodiment, a pair of claw insertion portions 10 for inserting the fork claws of a forklift (not shown) are provided at predetermined positions in the left-right direction of the beam member 5b constituting each ceiling portion 5. In the illustrated example, the claw insertion portion 10 is configured by welding and fixing a U-shaped member formed of a metal bar or a metal plate to the upper portion of the beam member 5b in the reverse direction (inverted U-shape). Note that the claw insertion portion 10 is preferably provided at the upper portion of the beam member 5b, but the claw insertion portion 10 can also be fixed by welding a U-shaped member to the lower portion of the beam member 5b. Of course, as long as it can be supported from below by the fork claws, the claw insertion portion 10 can take any form.

[0035] The claw insertion part 10 is preferably provided at a position where the gantry frame body 2 is horizontally supported when the fork claws of the forklift are inserted to lift the gantry frame body 2. In the illustrated example, the claw insertion parts 10 are fixed at both positions equidistant from the central vertical member 5c connecting the roof member 5a and the beam member 5b in the left - right direction.

[0036] Next, the details of the connection structure between the support part 6 and the supports 7 and 8 will be described.

[0037] Of the pair of supports 7 and 8, the support located on either the left or right side (here, the first support 7 located on the outer side) is foldably connected to the ceiling part 5. On the other hand, the support located on the other side (here, the second support 8 located on the inner side) is detachably connected to the ceiling part 5. Also, all of the one or more support connection members 9 are detachably attached to the first support 7 and the second support 8, thereby enabling the connection of the first support 7 and the second support 8.

[0038] In this case, wheels 11 are provided at the lower end of the foldable first support 7. These wheels 11 preferably have a stopper function. Also, these wheels 11 are preferably configured to be rotatable about a vertical axis, such as casters.

[0039] In the present embodiment, downward - extending parts 5c are fixed to both ends of the ceiling part 5, and the upper end part of the first support 7 is connected to the downward - extending part 5c so that the first support 7 can rotate about the connection shaft 5d as a fulcrum. In this case, it is sufficient that the rotation range is defined so that the first support 7 can be folded at least inward. Also, separately from the connection shaft 5d, a bolt 5f is inserted across the downward - extending part 5c and the first support 7 and tightened with a nut (not shown), so that the upper end of the first support 7 is non - rotatably connected to the downward - extending part 5c, and by removing the bolt 5f, the upper end of the first support 7 may be rotatably connected to the downward - extending part 5c.

[0040] A pair of clamping plates 5e, 5e extending downward are provided on the beam member 5b of the ceiling portion 5. A fixing plate 8a extending upward from the upper end of the second support column 8 is inserted between the pair of guide plates 5e, 5e and fastened with bolts 5f, so that the upper end portion of the second support column 8 can be detachably fixed to the beam member 5b via the fixing plate 8a (see the enlarged view in Fig. 1).

[0041] Also, in this embodiment, a jack base 12 as a height adjustment mechanism is provided at the lower end of the second support column 8 (see Fig. 7). The bolt portion 12a of the jack base 12 is inserted inside the lower end of the second support column 8. With the seat plate 12c in contact with the ground surface G (surface contact), the second support column 8 can be raised and lowered by rotating the nut portion 12b with a handle to move it in the vertical direction, enabling adjustment of the height position of the second support column 8.

[0042] The support column connecting member 9 has a pair of fitting convex portions 14a, 14b that can be fitted into fitting concave portions 13a, 13b provided on the first support column 7 and the second support column 8, respectively. In this case, by the fitting operation of the pair of fitting convex portions 14a, 14b from the upper end side to the lower end side of each of the support columns 7, 8 of the support column connecting member 9, the pair of fitting convex portions 14a, 14b can be fitted into the corresponding fitting concave portions 13a, 13b, respectively.

[0043] In this embodiment, the support column connecting member 9 has a plate shape, and the pair of fitting convex portions 14a, 14b forming a part of the support column connecting member 9 are formed in a thin-walled shape. In this case, each of the fitting concave portions 13a, 13b has a slit shape extending in the left-right direction and the up-down direction, and the left-right interval is set to a predetermined size so that the pair of fitting convex portions 14a, 14b can be inserted from above (see Fig. 8).

[0044] Further, in the present embodiment, each fitting convex portion 14a, 14b has a wedge shape. Therefore, for example, by applying a blow from above to introduce each fitting convex portion 14a, 14b into the fitting concave portions 13a, 13b having a slit shape, and causing each fitting convex portion 14a, 14b to bite into the upper end edge of the corresponding fitting concave portion 13a, 13b, the support column connecting member 9 can be firmly connected to each support column 7, 8 via the fitting concave portions 13a, 13b.

[0045] Further, an engagement hole 14c is provided at an intermediate position in the left - right direction of the pair of fitting convex portions 14a, 14b of the support column connecting member 9 as an engagement portion that can be engaged with the tension adjustment mechanism 15 in the vertical direction. Further, this engagement hole 14c is provided in a downward protruding portion 9a provided between the pair of fitting convex portions 14a, 14b of the support column connecting member 9.

[0046] The tension adjustment mechanism 15 is configured to connect a seat body 17 fixed to the ground surface G by driving an anchor 16 and the support column connecting member 9, and to be able to adjust the magnitude of the tension acting on the support column connecting member 9 and the seat body 17. In the present embodiment, the tension adjustment mechanism 15 is constituted by a turnbuckle 18 (see FIG. 9). The turnbuckle 18 has a body portion 18a, and a first screw portion 18b and a second screw portion 18c that move closer to or away from each other as the body portion 18a rotates about its axis. Hook portions 18b1, 18c1 are provided at the tips of the screw portions 18b, 18c. For example, by hooking the first hook portion 18b1 into the engagement hole 14c of the support column connecting member 9, the support column connecting member 9 and the turnbuckle 18 can be connected.

[0047] The seat body 17 has a seat body main body 17a fixed to the ground surface G by driving an anchor 16, and a connecting ring 17b as an engaged portion that can be engaged with the second hook portion 18c1 of the turnbuckle 18 constituting the tension adjustment mechanism 15. In the present embodiment, a part of the connecting ring 17b is a straight portion 17b1, and the connecting ring 17b is supported by the seat body main body 17a so as to be rotatable about a horizontal axis with this straight portion 17b1 as a fulcrum (see FIG. 8).

[0048] In this case, for example, as shown in FIG. 8, the grounding and fixing position of the seat body 17 (seat body main body 17a) is set so that the straight portion 17b1, each screw portion 18b, 18c, and the engaging hole 14c are located on the same vertical line.

[0049] The bellows-foldable tent 1 with the above configuration is assembled to a certain extent at the factory and then transported to the site where it is to be temporarily installed, and the final assembly is carried out at the site. At the factory, as shown in FIG. 4, a plurality of portal frames 2 are contracted, and as shown in FIG. 5, the tent sheet 3 is placed on the ceiling portion 5 with the support column portion 6 in a folded state. When folding the support column portion 6, the second support column 8 and the support column connecting member 9 are removed, and only the first support column 7 is folded inward, so that the bellows-foldable tent 1 is contracted in the vertical direction. In this way, by folding the support column portion 6, the ceiling portion 5 becomes lower, and it becomes easier to perform the work of stretching the tent sheet 3 on the ceiling portion 5.

[0050] In the state where the support column portion 6 is folded as described above, for example, in a state where a plurality of folded support column portions 6 (first support column 7) are connected to each other by a connecting tool (not shown), the bellows-foldable tent 1 is placed on the loading platform of the truck by a forklift (not shown) and transported to the installation site.

[0051] After arriving at the installation site, the bellows-foldable tent 1 with the support column portion 6 folded is unloaded from the loading platform of the truck. For loading and unloading from the loading platform of the truck, a forklift can be used, or it can be lifted and unloaded by a crane.

[0052] Then, when the portal frame 2 is gradually lifted from the ground, the folded first support column 7 rotates due to its own weight so that the wheels 11 are separated from the ceiling portion 5. Therefore, with the wheels 11 grounded, by gradually lifting up the portal frame 2, the first support column 7 is deployed in the standing direction and stands vertically.

[0053] After all the first columns 7 of the portal frames 2 are vertically erected in this way, a pair of portal frames 2 at both the front and rear ends are translated by the rolling of the wheels 11 to widen and extend the distance between the adjacent portal frames 2 connected by the independent telescopic mechanism 4B (see Fig. 4). Then, the horizontal joint member 19 is attached across the adjacent portal frames 2, and after fixing the pair of portal frames 2 connected to the link rods 4a, 4b of the independent telescopic mechanism 4B at a predetermined distance, the plurality of portal frames 2 connected to the link rods 4a, 4b of the interlocking telescopic mechanism 4A are expanded to a predetermined distance. As a result, the bellows-folded tent 1 is in a state of being expanded to the size at the time of installation (see Fig. 3). At this point, only the first column 7 is in a vertically erected state, and the second column 8 has not been attached yet (see Fig. 6).

[0054] Therefore, with the bellows-folded tent 1 expanded to a predetermined size as described above, the second column 8 is attached to the ceiling portion 5. After attaching it to the ceiling portion 5, the second column 8 is raised and lowered by rotating and operating the nut portion 12b with a handle of the jack base 12 provided at the lower end of the second column 8 to move it in the vertical direction, thereby adjusting the height position of the second column 8. At this time, by previously reducing the height dimension of the jack base 12, it becomes easy to attach it to the ceiling portion 5. When the second column 8 is attached, while both the first column 7 and the second column 8 are in a vertically erected state, the column connecting member 9 has not been attached yet. Also, the turnbuckle 18 forming the tension adjustment mechanism 15 has not been attached yet (see Fig. 7).

[0055] Accordingly, after attaching the second support column 8, the first support column 7 and the second support column 8 are connected by the support column connecting member 9. Specifically, as shown in FIG. 8, a pair of fitting convex portions 14a and 14b provided on both the left and right sides of the support column connecting member 9 are inserted into corresponding fitting concave portions 13a and 13b from above, and the fitting convex portions 14a and 14b are made to be in a fitting state (a wedge engagement state in this embodiment) with respect to the fitting concave portions 13a and 13b by tapping downward. Thereby, the first support column 7 and the second support column 8 are interconnected via the support column connecting member 9. In the illustrated example, two support column connecting members 9 are attached to each support column portion 6, and the connection between the first support column 7 and the second support column 8 is achieved at two locations in the vertical direction (see FIG. 1).

[0056] Also, the base body 17a is fixed to the ground surface G by driving the anchor 16 so that the straight portion 17b1 of the connecting ring 17b is positioned directly below (vertically below) the engagement hole 14c of the support column connecting member 9. After thus fixing the base body 17a to the ground and attaching the support column connecting member 9, the first hook portion 18b1 of the turnbuckle 18 forming the tension adjusting mechanism 15 is hooked on the engagement hole 14c of the support column connecting member 9, and the second hook portion 18c1 of the turnbuckle 18 is hooked on the connecting ring 17b of the base 17, thereby connecting the support column connecting member 9 and the base 17. Then, by rotating the body portion 18a of the turnbuckle 18, the first screw portion 18b and the second screw portion 18c are moved in a direction to approach each other, and a predetermined tension is applied to the support column connecting member 9 and the base 17, respectively. Thereby, the support column connecting member 9 is firmly connected to the base 17 fixed to the ground. In the above manner, the assembly and installation of the bellows type folding tent 1 are completed.

[0057] As described above, in the bellows-foldable tent 1 according to the present embodiment, by connecting a pair of support columns 7 and 8 with a support column connecting member 9, it is possible to improve the rigidity of the bellows-foldable tent 1 and stabilize the posture during installation. Further, during transportation or assembly, the support column connecting member 9 is removed, and then the second support column 8 is removed from the ceiling portion 5, so that the structure of the support column portion 6 can be simplified. Therefore, it becomes possible to easily perform the folding operation or the deployment operation of the support column portion 6. Further, at this time, since the wheels 11 are provided at the lower end of the first support column 7 connected to the ceiling portion 5, it is possible to smoothly perform the folding operation or the deployment operation of the support column portion 6 accompanying the lifting of the ceiling portion 5. From the above, according to the bellows-foldable tent 1 according to the present embodiment, it is possible to ensure workability during assembly and transportation while improving rigidity and stabilizing the posture during installation.

[0058] Further, in the present embodiment, a structure is adopted in which the support column connecting member 9 that connects the support columns 7 and 8 at the lowest position among one or a plurality of support column connecting members 9 and the seat body 17 fixed to the ground surface G by driving the anchor 16 are connected by a tension adjusting mechanism 15. Therefore, the support column connecting member 9 can be firmly fixed. Thus, it becomes possible to further improve the rigidity of each of the support columns 7 and 8 and stabilize the posture of the bellows-foldable tent 1. Further, by connecting the seat body 17 fixed to the ground by driving the anchor 16 and the support column connecting member 9 with the tension adjusting mechanism 15, after the seat body 17 is fixed to the ground and the first support column 7 that can be folded by lifting the portal frame body 2 is deployed, the tension between the support column connecting member 9 and the seat body 17 can be increased to a predetermined magnitude. Therefore, there is no risk of hindering good workability during assembly.

[0059] In addition, in the bellows-type folding tent 1 according to the present embodiment, fitting recesses 13a and 13b are provided in the first support column 7 and the second support column 8 respectively, and a pair of fitting protrusions 14a and 14b that can be fitted to the fitting recesses 13a and 13b by a fitting operation from the upper end side to the lower end side of each of the support columns 7 and 8 are provided on the support column connecting member 9. Therefore, the support columns 7 and 8 can be connected more simply. Further, since the fitting protrusions 14a and 14b and the fitting recesses 13a and 13b can be fitted by a fitting operation from the upper end side to the lower end side of each of the support columns 7 and 8, by applying a predetermined tension to the support column connecting member 9 by the tension adjustment mechanism 15, the fitting state can be made stronger. Further, since the fitting state can be easily released by hitting from below to above, there is no problem in terms of workability related to removal.

[0060] As described above, although one embodiment of the present invention has been described, the bellows-type folding tent according to the present invention is not limited to the above-exemplified configuration, and it goes without saying that various modifications are possible within the scope of the present invention.

Explanation of Reference Numerals

[0061] 1 Bellows-type folding tent 2 Gate-shaped frame body 3 Tent sheet 4 Telescopic connection mechanism 4A Interlocking telescopic mechanism 4B Independent telescopic mechanism 5 Ceiling part 5b Beam material 6 Support column part 7 First support column 8 Second support column 9 Support column connecting member 10 Claw insertion part 11 Wheels 12 Jack base 13a, 13b Fitting recesses 14a, 14b Fitting protrusions 14c Engaged hole 15 Tension adjustment mechanism 16 Anchor 17 Seat body 17a Seat body main body 17b Connecting ring 18 turnbuckle

Claims

1. It is provided with a plurality of portal frame bodies and a telescopic connection mechanism that connects adjacent portal frame bodies and is telescopic in a connected state. The portal frame body has a ceiling portion and a pair of support columns that are foldably connected to both ends of the ceiling portion. In the bellows-foldable tent in which each of the support columns has a first support column and a second support column that extend parallel to each other, and both of the support columns are connected to each other by one or more support column connection members, A bellows-foldable tent, characterized in that one of the support columns has wheels at its lower end, and both the other support column and the support column connection member are configured to be detachable.

2. A seat body fixed to the ground surface by driving an anchor, The bellows-foldable tent according to claim 1, further comprising a tension adjustment mechanism that connects the support column connection member located at the lowermost position among the one or more support column connection members and the seat body and can adjust the tension acting on each other.

3. Fitting recesses are respectively provided in the first support column and the second support column. The bellows-foldable tent according to claim 2, wherein the support column connection member is provided with a pair of fitting protrusions that can be fitted with the fitting recesses by a fitting operation from the upper end side to the lower end side of each support column.

4. The bellows-foldable tent according to claim 3, wherein the pair of fitting protrusions are wedge-shaped, and are configured to form a wedge engagement therebetween.

5. The bellows-foldable tent according to claim 3, wherein an engaged portion that can be engaged with an engaging portion of the tension adjustment mechanism in the vertical direction is provided at an intermediate position between the pair of fitting protrusions of the support column connection member.

6. The bellows-foldable tent according to claim 3, wherein the support column connection member has a plate shape.

7. The bellows-foldable tent according to claim 2, wherein the tension adjustment mechanism is composed of a turnbuckle.

8. The seat body has a seat body main body fixed to the grounding surface, and an engaged portion engageable with an engaging portion provided in the tension adjusting mechanism, and the engaged portion is configured to be movable with respect to the seat body main body. The bellows folding tent according to claim 2.

Images