Accordion-type tent with tilt prevention device

Abstract

The objective is to create a bellows-type tent that can be used efficiently as a facility in a stable position at all times, without obstructing the use of the space inside the tent house or the central part of the floor, and equipped with a tilt prevention device that can withstand strong external forces from the side with a simple structure. [Solution] The tilt prevention device A1 for preventing the wheels 6 of the leg portion 1 of the bellows-type tent A from lifting off the track 7 comprises a C-shaped groove guide rail 8 provided parallel to the side of the track 7, and a locking arm 9 that is locked to this groove guide rail 8, with the base end portion 9a of the locking arm 9 being locked to the leg portion 1 of the bellows-type tent A.

Description

Technical Field

[0001] This invention relates to a gable-type tent with a tipping prevention device widely used in warehouses, workplaces, etc.

Background Art

[0002] Generally, a gable-type tent is also called a telescopic tent house and is widely used in simple warehouses, workplaces such as painting, and storage warehouses (garages).

[0003] The gable-type tent has a reverse U-shaped or reverse angled U-shaped telescopic frame (frame) in which a plurality of columnar legs that support both side walls of a tent house that can be folded in a gable shape and a beam part that connects the upper ends of the legs on both sides are integrated, and are arranged at intervals in the direction of the ridge of the tent house, and are connected by a parallel link type telescopic mechanism, so that the length of the ridge can be changed to change the size of the indoor space and the floor area according to the purpose of use (Patent Document 1).

[0004] Such a gable-type tent has wheels mounted on the lower ends of the legs of each telescopic frame (frame), and the load of the tent house applied to the legs is received by the rails, and the wheels are prevented from coming off by flanges or auxiliary wheels provided on one or both end faces of each. (Patent Document 2).

[0005] In the conventional gable-type tents described in Patent Documents 1 and 2, when one of the left and right sides is affected by strong wind, there is a risk that the legs on the other side will be lifted by the wind pressure. Although the flanges or auxiliary wheels attached to one or both end faces of the wheels can prevent the wheels from coming off to the side, they cannot sufficiently prevent the legs from being lifted.

[0006] As shown in Figure 6, when transporting an object with a high center of gravity, a trolley B in which both left and right wheels 21 are mounted on a single axle 20 is known to have a mooring device B1 for the trolley B, in which a C-shaped groove-shaped auxiliary rail 22 is embedded in the middle of the length of the axle 20, and a large-diameter head 23 at the end of the mooring device that extends downward from the middle of the axle 20 is locked inside the groove-shaped auxiliary rail 22, thereby preventing the axle 20 and the trolley B from tilting or lifting (Patent Document 3). [Prior art documents] [Patent Documents]

[0007] [Patent Document 1] Japanese Patent Application Publication No. 60-62380 [Patent Document 2] Japanese Patent Publication No. 2021-67072 [Patent Document 3] Japanese Utility Model Publication No. 6-22147 [Overview of the project] [Problems that the invention aims to solve]

[0008] However, the anti-tilting mooring device installed in the middle of the axle that holds the pair of wheels on the left and right of the transport trolley cannot be applied to a bellows-type tent that does not have an axle that holds the pair of wheels on the left and right. Furthermore, if auxiliary rails or anti-tilting mooring devices are placed in the center of the tent house, the efficiency of using the floor space and space of the bellows-type tent will be greatly impaired, making it difficult to repurpose such mooring devices.

[0009] Incidentally, as mentioned above, a simple structure like a bellows-type tent is subjected to wind pressure on its sides or external forces such as earthquakes, causing the entire tent house to tilt. In this case, one of the left and right legs acts as a fulcrum, causing the other leg to tilt upwards. Therefore, a larger upward force acts on the part closer to the aforementioned fulcrum.

[0010] Therefore, even if a mooring device to prevent tipping is installed relatively close to the aforementioned pivot point, the tent can be lifted with a greater force than the actual wind pressure due to the "lever principle." If the mooring device is not strong enough, the accordion-type tent cannot withstand strong crosswinds or inertial forces from earthquakes.

[0011] Therefore, the objective of this invention is to solve the above-mentioned problems, prevent the legs of a bellows-type tent from lifting when subjected to external forces such as wind or earthquakes from the side, and to provide a bellows-type tent with a tilt prevention device that can withstand strong external forces from the side with a simple structure, allowing large bellows-type tents to be used efficiently as facilities in a stable position at all times, such as warehouses or work buildings, without hindering the use of the space inside the tent house or the central part of the floor surface. [Means for solving the problem]

[0012] To solve the above problems, this invention provides a bellows-type tent with a tilt prevention device, comprising: a plurality of inverted U-shaped frames, each integrating a pair of legs and a beam connecting them; a parallel link mechanism that arranges these inverted U-shaped frames in multiple layers with spacing between them and connects them in a way that the spacing can be changed; a tent sheet that covers the connected plurality of inverted U-shaped frames in a bellows-like manner; wheels that support the lower ends of each of the pair of legs so as to be movable on a track laid on the tent installation surface; and a tent tilt prevention device that restricts the lifting of these wheels on the track. This tilt prevention device consists of a C-shaped groove guide rail provided on the side of the inverted U-shaped frame parallel to the track, and a locking arm with an anchor at its tip that is guided to and can be locked by the opening edge of the groove guide rail, with the base end of this locking arm locked to the legs.

[0013] As described above, the bellows-type tent with a tilt prevention device of this invention has a locking arm for the tilt prevention device that is guided to the opening edge of a groove-shaped guide rail installed on the side of the inverted U-shaped frame on the installation surface, and has a lockable anchor at its tip. In order to resist the rotational force that causes the other leg of the inverted U-shaped frame to lift up with one of the contact points with the track of the left and right legs of the inverted U-shaped frame as a pivot point when the bellows-type tent is subjected to wind pressure from the side, the locking arm is used to lock the other leg, which is located sufficiently far from the pivot point on the inverted U-shaped frame.

[0014] Therefore, the locking arm can counteract the rotational force with a relatively small downward force against the contact point between the left and right legs of the inverted U-shaped frame and the trajectory, with one of the contact points acting as the pivot point, thereby locking the legs in place so that they do not lift up.

[0015] It is preferable to secure the locking arm, which is attached to one or both sides of the leg of the inverted U-shaped frame, to the leg via a bracket in order to more efficiently resist the rotational force with a small locking force, that is, to ensure that the locking arm is attached to the grooved guide rail at a position as far away from the leg as possible.

[0016] Furthermore, by providing the locking arm to the leg portion via a bracket so that it can swing freely, the anchor at the tip of the locking arm can be more reliably locked to the opening edge of the C-shaped grooved guide rail, regardless of the inclination angle of the leg portion.

[0017] The accordion-type tent with a tilt prevention device of this invention consists of a C-shaped groove-shaped guide rail with a cross section, which is provided parallel to the track on the side of the inverted U-shaped frame of the installation surface, and a locking arm that engages with it. As a result, the tilt prevention device is provided on the inside, outside, or both sides of the tent house, and as a result, it becomes an accordion-type tent that has a large interior space and a large interior floor surface that can be efficiently used according to the purpose of use as a membrane structure building for warehouses or work facilities. [Effects of the Invention]

[0018] This invention is composed of a grooved guide rail with a C-shaped cross-section provided parallel to a track on the side of an inverted U-shaped frame of the installation surface, and a locking arm locked to this grooved guide rail. Therefore, when an external force such as wind or earthquake is received from the side of the Jabara type tent, it becomes difficult for the legs on the opposite side to lift up. Especially when a large Jabara type tent is set up as a warehouse or a working building, it can be efficiently used as a facility in a stable posture even when receiving strong winds or the like, without interfering with the space inside the tent house or the central part of the floor surface, and has the advantage of being a Jabara type tent with an anti-tipping device that has a simple structure and can fully withstand external forces such as strong cross winds and inertial forces of earthquakes.

Brief Description of the Drawings

[0019] [Figure 1] Schematic side view of the Jabara type tent of the embodiment [Figure 2] Front view of FIG. 1 [Figure 3] Cross-sectional view showing an enlarged main part of FIG. 1 [Figure 4] [[ID=二十ー]]Explanatory drawing showing the inclined state of the legs in FIG. 3 [Figure 5] Explanatory drawing showing an enlarged main part of FIG. 2 and the arrangement of the anti-tipping device [Figure 6] Explanatory drawing of the anti-tipping mechanism in Patent Document 3

Embodiments for Carrying Out the Invention

[0020] Embodiments of this invention will be described below based on the accompanying drawings. As shown in Figures 1-4, the bellows-type tent A with a tilt prevention device of the embodiment is set up as a membrane structure building for warehouses or work areas, and comprises a pair of legs 1 in the width direction of the opening, a plurality of inverted U-shaped frames 3 which are integrated with beams 2 connecting them, a parallel link mechanism 4 which connects these inverted U-shaped frames 3 in multiple layers with spacing in the ridge direction and which allows the spacing to be changed, a tent sheet 5 which covers the plurality of inverted U-shaped frames 3 in a bellows-like manner, wheels 6 which movably support the lower ends of each of the pair of legs 1, and a track 7 which guides the wheels 6 in the direction in which the spacing is changed, and a tilt prevention device A1 which prevents the wheels 6 from lifting off the track (rail) 7.

[0021] In other words, the accordion-type tent A of this embodiment has a pair of legs 1 made of two rod-shaped frames 1a and 1b, and a beam section 2 connecting the upper parts of each leg 1 is made of two rod-shaped frames 2a and 2b, forming an inverted U-shaped frame 3. These inverted U-shaped frames 3 are then arranged in multiple layers with spacing between them in the direction of the dome-shaped tent's ridge.

[0022] The parallel link mechanism 4 is a mechanism that combines multiple parallel cranks, which are X-shaped link units, and is also known as a rage tong. This mechanism makes it possible to widen or narrow the distance between the legs 1 while keeping them parallel to each other.

[0023] As shown in Figure 3, the wheel 6 is rotatably held on an axle 11, which is held by a pair of U-shaped fittings 10, via bearings. An auxiliary wheel 12 is provided on the lower end surface of the U-shaped fittings 10 to prevent the wheel 6 from derailing laterally from the track (rail) 7, and flanges 6a are also provided on both ends of the wheel 6 to prevent derailment. The track (rail) 7 can usually be made of steel formed by forging or the like.

[0024] The tilt prevention device A1 consists of a C-shaped grooved guide rail 8 provided parallel to the track 7 on the side of the leg portion 1 of the inverted U-shaped frame 3 positioned on the installation surface of the tent house, and a locking arm 9 with a disc-shaped anchor 9b at its tip that is guided by and can be locked to the opening edge 8c of the grooved guide rail 8.

[0025] Although Figure 3 shows the tilt prevention device A1 installed on the side of one leg 1 of the inverted U-shaped frame 3 and on the outside of the bellows-type tent A, as shown in Figure 5, the tilt prevention device A1 can be installed not only on the outside (one side) of the inverted U-shaped frame 3, but also on the inside (one side) as shown by the dashed line in the same figure, or on both sides as shown by the solid and dashed lines.

[0026] The locking arm 9 is formed in a large-diameter disc shape so that its base end 9a can be locked to the leg portion 1, and its tip anchor 9b can be locked in a state where it is inserted inside the opening edge 8c of the groove-shaped guide rail 8.

[0027] The C-shaped channel guide rail 8 is constructed by arranging a pair of channel steel sections 8b on a base plate 8a so that their openings face each other, forming a C-shape with an open top. The channel guide rail 8 thus formed is sandwiched between a pair of L-shaped steel sections 13 from both sides and is fixed with bolts to the floor surface 14, which is the installation surface of the tent house.

[0028] Furthermore, if the floor surface is the ground, it is preferable to use a floor surface hardened with concrete or asphalt in order to securely fix the channel-shaped guide rail 8. Alternatively, the channel-shaped guide rail 8 may be fixed to a concrete or wooden pillow-shaped section fixed to the ground with bolts or stakes.

[0029] In addition to the above, the C-shaped channel guide rail 8 can also be substituted with a lip channel steel, which is forged from steel so that a lip-shaped edge extends from the opening of a C-shaped channel steel.

[0030] The illustrated locking arm 9 has a rod-shaped portion 9c having the anchor 9b of the above configuration, and an integrally formed rectangular metal plate-shaped base end portion 9a. The base end portion 9a is locked by a bolt 16 to a bracket 15 which is fixed to the rod-shaped frame 1a of the leg portion 1 by welding or the like. The fastening state of this bolt 16 can be adjusted as needed, and the arm can be mounted in a swingable or non-swingable state.

[0031] The locking arm 9 can be locked to the inside of the opening edge 8c with a disc-shaped anchor 9b inserted into the groove of the channel-shaped guide rail 8. The anchor 9b is fixed to the threaded surface of the rod-shaped portion 9c of the locking arm 9 by a nut or the like, using a disc or polygonal plate-shaped member with a diameter larger than the opening width of the opening edge 8c.

[0032] With the locking arm 9 configured in this way, if the tent house tilts due to crosswinds or earthquake tremors and the leg portion 1 lifts off the upper surface of the track 7, the anchor 9b will lock onto the opening edge 8c of the groove-shaped guide rail 8.

[0033] The form of anchor 9b can be any well-known form of anchor, as long as such a locking state functions adequately. For example, it may be in the form of an anchor, umbrella, mushroom, or anchor bolt.

[0034] As described above, the bellows-type tent with a tilt prevention device in this embodiment may tilt when subjected to wind pressure on the sides or external forces such as earthquakes. In this case, one of the contact points between the left and right legs 1 and the track 7 receives a rotational force that causes the other leg 1 to lift up, with the other leg 1 acting as a fulcrum.

[0035] Since the aforementioned support point is located below the other leg 1 of the inverted U-shaped frame 3, which is sufficiently far from the other leg 1, the locking force required for the locking arm 9 to resist the rotational force that causes the bellows-type tent to tilt is relatively small.

[0036] As shown in Figure 4, the locking state of the locking arm 9 and the grooved guide rail 8 is such that when the locking arm 9 is fixed to the leg portion 1, the inner surface of the opening edge 8c and the anchor 9b of the locking arm 9 are in contact in an intersecting manner.

[0037] Furthermore, as shown by the dashed line in Figure 4, if the base end 9a of the locking arm 9 is locked to the bracket 15 with a bolt 16 via a washer (not shown), and is swingable or swingable relative to the leg portion 1, then the anchor 9b of the locking arm 9 will be in surface contact with both inner surfaces of the opposing pair of opening edges 8c of the groove-shaped guide rail 8 when locked.

[0038] In this locking state where the opening edge 8c and anchor 9b are in surface contact, the pressure force per unit area between the opening edge 8c and anchor 9b is smaller than when they are in line contact in an intersecting state, allowing for more secure locking. Furthermore, the components of the tilt prevention device A1 become less prone to breakage, improving durability, and enhancing both tilt prevention performance and ease of maintenance.

[0039] Furthermore, in accordion-type tents equipped with such tilt prevention devices, the locking mechanisms of the tilt prevention devices, which are positioned on the outside, inside, or both of the inverted U-shaped frame, are easily visible, making repairs, adjustments, and other maintenance of these devices, such as replacing parts, extremely easy. [Explanation of symbols]

[0040] 1 leg 1a, 1b, 2a, 2b Rod-shaped frame 2 Beam section 3. Inverted U-shaped frame 4. Parallel link mechanism 5 Tent sheet 6, 21 wheels 7 orbit 8 grooved guide rails 8a bottom plate 8b Channel steel 8c Opening edge 9. Locking arm 9a Proximal end 9b Anchor 9c Rod-shaped part 10 U-shaped metal fittings 11, 20 axles 12 training wheels 13 L-shaped steel 14 Floor surface 15 brackets 16 volts 22. Grooved auxiliary rail 23 Large diameter head A bellows-type tent A1 anti-tilting device B Trolley B1 mooring device

Claims

1. Multiple inverted U-shaped frames, each integrating a pair of legs and a beam connecting them, This inverted U-shaped frame is arranged in multiple layers with gaps between them, and a parallel link mechanism connects them so that the gaps can be changed. A tent sheet that can be folded in an accordion-like manner to cover the aforementioned multiple connected inverted U-shaped frames, Wheels that support the lower ends of each of the pair of legs so as to be movable on a track laid on the tent installation surface, This includes a tent tilt prevention device that restricts the wheel from lifting off the track, This tilt prevention device comprises a C-shaped grooved guide rail provided on the side of the inverted U-shaped frame parallel to the track, and a locking arm with an anchor at its tip that is guided to and can be locked by the opening edge of the grooved guide rail, with the base end of the locking arm being locked to the leg portion, resulting in a bellows-type tent with a tilt prevention device.

2. The bellows-type tent with a tilt prevention device according to claim 1, wherein the base end of the locking arm is pivotably locked to the leg portion via a bracket.

3. The accordion-type tent with a tilt prevention device according to claim 1 or 2, wherein the above-mentioned accordion-type tent is a membrane structure building for use as a warehouse or for work.

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