Telescopic tent structure

Abstract

To provide a telescopic tent structure that prevents torsion of a support pole frame and allows smooth movement of a movable frame.SOLUTION: A telescopic tent structure comprises: a plurality of movable frames 2 that are arranged in parallel, are movable on a rail R, and are configured such that a parallel interval W at both ends is fixed and a parallel interval D of a middle part is telescopic; a spacing-holding member 8 that fixes the parallel interval W; and a scissor-shaped crossbar 7 that makes the parallel interval D telescopic. The movable frame 2 comprises a ceiling frame 3, a pole frame 4, wheels, and guide wheels which sandwich the rail R. The pole frame 4 comprises an inner vertical member 4a, an outer vertical member 4b, a diagonal member 4c, and a horizontal member 4d. The crossbar 7 is connected to the inside of the inner vertical member 4a. The horizontal member 4d of the movable frame 2, which is connected in a telescopic manner, is connected by a torsion restraint 9. The torsion restraint 9 is rotatably connected to the horizontal member 4d, and comprises folding connecting bars 9a and 9b that can be folded at the middle part.SELECTED DRAWING: Figure 8

Description

[Technical field]

[0001] The present invention relates to a large tent constructed of steel trusses, and in particular to an expandable tent structure that is expandable in the depth direction of the tent. [Background technology]

[0002] Conventionally, this type of tent has a truss-structured ceiling frame connected to both ends with a truss-structured column frame, and multiple movable frames are arranged in parallel in the depth direction of the tent and movably connected to each other, so that the tent can be expanded and contracted in the depth direction, and an expandable tent structure is known in which the awning stretched over the movable frames can be expanded and contracted in an accordion-like manner in the depth direction of the tent (Patent Document 1, etc.). The movable frame of the expandable tent structure has wheels and guide wheels at the bottom of the column frames, and the wheels roll on rails installed on the ground, and the guide wheels pinch both sides of the rail web to move on the rails without derailing (Patent Document 2, etc.). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2010-065484 A [Patent Document 2] JP 2004-315104 A Summary of the Invention [Problem to be solved by the invention]

[0004] In the above-mentioned conventional extendable tent structure, when the height exceeds 7 meters and the width exceeds 15 meters, for example, when the parallel movable frames are moved on the rails, the ceiling frame of the movable frame, especially the center part, may bend so as to bulge in the direction of movement. When the ceiling frame of the movable frame bends in this way, a torsional force acts on the support frames connected to both ends of the ceiling frame, and the guide wheels attached to the lower ends of the support frames are pressed against the web of the rails, making it difficult to move the movable frame.

[0005] SUMMARY OF THE PRESENT EMBODIMENTS The main object of the present invention is to provide an extendable tent structure that prevents twisting of the support frame and enables smooth movement of the movable frame. [Means for solving the problem]

[0006] In order to solve the above problems, an extendable tent structure according to one aspect of the present invention includes a plurality of movable frames arranged in parallel and movable on rails, the parallel spacing at both ends being fixed and the parallel spacing at a middle portion between the both ends being extendable, a spacing retaining member connecting the adjacent movable frames so as to fix the parallel spacing at both ends, and a scissor-shaped crossbar connecting the adjacent movable frames so as to allow the parallel spacing at the middle portion to be extendable, the movable frames include a ceiling frame having a truss structure, a pair of pillar frames having a truss structure connected to both ends of the ceiling frame, and a front support provided at the lower end of the pillar frames. The tent is equipped with wheels that roll on the rails and guide wheels that are attached to the lower end of the pillar frame and arranged to sandwich the rails. The pillar frame comprises an inner vertical member, an outer vertical member, a diagonal member connecting the inner vertical member and the outer vertical member, and a horizontal member connecting the inner vertical member and the outer vertical member. The movable frame connected by the crossbar has the crossbar connected to the inside of the inner vertical member, and adjacent horizontal members in the depth direction of the tent are connected to each other by a torsion restraint device. The torsion restraint device comprises a foldable connecting bar that is rotatably connected to the horizontal member and is rotatably connected at the middle so as to be foldable vertically.

[0007] It is preferable that a plurality of the foldable tie bars are connected to the horizontal member at intervals.

[0008] Preferably, the two foldable tie bars are connected to both ends of the horizontal member.

[0009] It is preferable that the folding tie bars connected to the horizontal member are connected to each other by cross members. Effect of the Invention

[0010] According to the present invention, the horizontal members of the column frames adjacent to each other in the depth direction are connected to each other by the torsion restraint portion having the above-mentioned configuration, thereby making it possible to resist torsion of the column members. [Brief description of the drawings]

[0011] [Figure 1] FIG. 1 is a front view showing one embodiment of an extendable tent structure according to the present invention. [Diagram 2] FIG. 2 is a schematic side view showing the extendable tent structure of FIG. 1 in an extended state. [Diagram 3] FIG. 2 is a schematic side view showing the contracted state of the extendable tent structure of FIG. 1. [Figure 4] 2 is an enlarged front view showing a pillar frame of a portion P in FIG. 1. [Diagram 5] 5 is an enlarged, partially cutaway front view of parts A and B in FIG. 4. [Figure 6] FIG. 2 is a partially enlarged side view showing the extendable tent structure of FIG. 1 in an extended state. [Figure 7] FIG. 2 is a partially enlarged side view showing the contracted state of the extendable tent structure of FIG. [Figure 8] FIG. 2 is an enlarged perspective view of a main part of the extendable tent structure of FIG. 1 in an extended state. [Figure 9] FIG. 2 is a cross-sectional view taken along line AA in FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0012] An embodiment of an extendable tent structure according to the present invention will be described below with reference to Figs.

[0013] Fig. 1 is a front view of the extendable tent structure, Fig. 2 is a side view of the extendable tent structure in an extended state, and Fig. 3 is a side view of the extendable tent structure in a retracted state. Fig. 1 shows the tent structure without an awning. Figs. 2 and 3 show an awning C that is placed over the extendable tent structure in broken lines.

[0014] With reference to Figures 1 to 3, the expandable tent structure 1 comprises a plurality of movable frames 2... arranged in parallel and movable on a rail R, with the parallel spacing W of both end portions 1A being fixed and the parallel spacing D of a middle portion 1C between both end portions 1A, 1B being expandable.

[0015] The movable frame 2 comprises a ceiling frame 3 with a truss structure, a pair of left and right column frames 4 with a truss structure connected to both sides of the ceiling frame 3, wheels 5 that roll on a rail R provided at the lower end of the column frame 4, and guide wheels 6 provided at the lower end of the column frame 4 and positioned so as to sandwich the rail R.

[0016] The column frame 4 is composed of a truss including an inner vertical member 4a, an outer vertical member 4b, and a diagonal member 4c connecting the inner vertical member 4a and the outer vertical member 4b, and further includes a horizontal member 4d connecting the inner vertical member 4a and the outer vertical member 4b. The ceiling frame 3 is composed of a truss including an upper chord member 3a, a lower chord member 3b, and a diagonal member 3c and a vertical member 3d connecting the upper chord member 3a and the lower chord member 3b. The truss structure of the ceiling frame 3 and the column frame 4 is not limited to the illustrated example, and other known planar truss structures can also be adopted.

[0017] The wheels 5 and the guide wheels 6 are attached to the lower end of the inner vertical member 4a. The rail R can be made of an I-beam. The wheels 5 roll on the upper surface of the upper flange of the I-beam that constitutes the rail R, and the guide wheels 6 are disposed so as to sandwich the web of the I-beam that constitutes the rail R, and guide the wheels 5 so that they roll along the track of the rail R.

[0018] The movable frames 2... connected by a scissor-shaped crossbar 7 constituting an X-link mechanism can expand and contract the parallel spacing D of the middle parts 1C of the adjacent movable frames 2, 2 connected by the crossbar 7. The movable frames 2, 2 at both ends in the depth direction of the tent have their parallel spacing W fixed with the inner movable frames 2 (movable frames 2 connected by the crossbar 7) by spacing members 8, and by keeping the parallel spacing W of both ends 1A, 1B constant, it is possible to ensure the self-supporting stability when the extendable tent structure is contracted. The spacing members 8 are provided in multiple stages at intervals in the height direction of the pillar frames 4.

[0019] The crossbar 7, which connects the movable frames 2 in an expandable manner, has two bars 7a and 7b connected to each other in a scissor-like manner by a middle shaft 7c so as to be rotatable. The lower ends of the two bars 7a and 7b of the crossbar 7 are pivotally attached to the lower ends of the inner vertical members 4a of the pillar frames 4 adjacent to each other in the tent depth direction (the length direction of the rail R) via shafts 7d protruding from the inside of the lower parts of the inner vertical members 4a. Meanwhile, the upper ends of the two bars 7a and 7b of the crossbar 7 are connected to the inner vertical members 4a of the pillar frames 4 adjacent to each other in the tent depth direction so as to be vertically movable and rotatable. Specifically, an eyebolt 7e is pivotally attached to the upper ends of the two bars 7a and 7b of the crossbar 7 so as to be rotatable, and the eyebolt 7e is inserted into a guide rod 7f fixed to the inside of the upper part of the inner vertical member 4a and extending in the vertical direction.

[0020] Adjacent crossbars 7, 7 are connected to the respective inner vertical members 4a by common eyebolts 7e and shafts 7d, so that the parallel column frames 4... can move in an interlocking manner and expand and contract.

[0021] The movable frames 2... connected extensibly by the crossbar 7 have their horizontal members 4d connected to each other by a torsion restraint device 9. The torsion restraint device 9 is rotatably connected to the horizontal member 4d and includes foldable connecting bars 9a, 9b rotatably connected at their middle portions so as to be foldable in the vertical direction (up and down).

[0022] The folding connecting bars 9a, 9b are rotatably connected to a bracket plate 10 fixed to the horizontal member 4d. The folding connecting bars 9a, 9b are also rotatably connected at their middle portions via a horizontal shaft 9c (FIG. 6).

[0023] In the illustrated torsion restraint device 9, two foldable connecting bars 9a, 9a are provided in parallel like a folding ladder and are connected to both ends of the horizontal member 4d in the longitudinal direction. The two parallel foldable connecting bars 9a, 9a are connected by four cross members 9d for reinforcement between the horizontal members 4d to which they are connected.

[0024] In the illustrated example, adjacent movable frames 2 are connected by two parallel foldable connecting bars 9a, 9a, but although not shown, adjacent movable frames 2 can also be connected by a single foldable connecting bar 9a, or by three or more parallel foldable connecting bars.

[0025] In the torsion restraint device 9 configured as described above, the bending angle changes in response to the expansion and contraction of the movable frame 2 connected by the crossbar 7 so that the position of the shaft 9c at the middle portion moves up and down in the vertical direction.

[0026] The spacing members 8 are connected between the movable frame 2 located on the outermost side in the tent depth direction (rail length direction) and the adjacent movable frame 2 on the inside thereof. The shape and attachment position of the spacing members 8 are not particularly limited, but as shown in Fig. 8, they may be ladder-shaped connecting horizontal members 4d, 4d of adjacent pillar frames 4, 4, or rod-shaped connecting adjacent outer vertical members 4b, 4b.

[0027] Conventionally, when the ceiling frame 3 of the movable frame 2 is bent as shown by the imaginary line (dotted line) in Fig. 9, a twisting force acts around the axis of the inner vertical member 4a to which the wheels 5 and guide wheels 6 are attached, causing the axle of the guide wheels 6 to tilt horizontally relative to the track of the rail R, making it difficult for the guide wheels 6 to rotate. However, since the other end of the foldable connecting bar 9a, which can be folded vertically, is connected to the adjacent horizontal member 4d and the parallel spacing W of both ends 1A, 1B is fixed, it is possible to counter the rotational moment force acting on the foldable connecting bar 9a through the horizontal member 4d. As a result, the twisting of the inner vertical member 4a can be suppressed.

[0028] The present invention should not be construed as being limited to the above-described embodiment, and various modifications are possible without departing from the spirit of the present invention. [Explanation of symbols]

[0029] 1. Extendable tent structure 1A, 1B end 1C middle part 2 Movable Frame 3 Ceiling frame 4-pillar frame 4a Inner vertical member 4b Outside longitudinal member 4c diagonal 4d horizontal material 5 wheels 6 Guide Wheel 7 Crossbar 8 Spacing member 9 Torsion Restraints 9a,9b Folding connecting bar 9d cross member R rail

Claims

1. A plurality of movable frames are arranged in parallel and movable on a rail, the parallel spacing between both ends being fixed, and the parallel spacing between the intermediate portions between the both ends being expandable and contractible; a spacing member that connects adjacent movable frames so as to fix the parallel spacing of the both ends; a scissor-shaped cross bar connecting the adjacent movable frames so as to make the parallel interval of the intermediate portions expandable and contractible; Equipped with The movable frame includes a ceiling frame having a truss structure, a pair of column frames having a truss structure connected to both ends of the ceiling frame, wheels provided at the lower ends of the column frames and rolling on the rails, and guide wheels provided at the lower ends of the column frames and arranged to sandwich the rails, The column frame includes an inner vertical member, an outer vertical member, a diagonal member connecting the inner vertical member and the outer vertical member, and a horizontal member connecting the inner vertical member and the outer vertical member, The movable frame connected by the crossbar has the crossbar connected to the inside of the inner vertical member, and the horizontal members adjacent in the tent depth direction are connected to each other by a torsion restraint device, The torsion restraint device includes a folding connecting bar that is pivotally connected to the horizontal member and pivotally connected at an intermediate portion thereof so as to be foldable in the vertical direction. Extendable tent structure.

2. 2. The extendable tent structure according to claim 1, wherein a plurality of said foldable tie bars are connected to said horizontal members at intervals.

3. 3. The extendable tent structure according to claim 2, wherein the two folding tie bars are connected to both ends of the horizontal member.

4. 3. The extendable tent structure according to claim 2, wherein a plurality of said folding tie bars connected to said horizontal members are connected to each other by cross members.

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