JP2007126066A - Opening and closing type tent - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an opening and closing type tent capable of eliminating twisting of a frame and three-dimensional entanglement of joint parts caused by travel in the horizontal direction when opening and closing the opening and closing type tent to improve its functionality and durability. <P>SOLUTION: In this opening and closing type tent 1, a rotary mechanism in the direction of rotation of a shaft crossing a shaft of a horizontal member 4 and a shaft of an oblique member 3 substantially orthogonally is provided in the joint part 6 of the oblique member 3 and a supporting face 5 and the joint part 7 of the oblique member 3 and the horizontal member 4, a mechanism for absorbing rotary force generated around the shaft of the oblique member 3 is provided in at least either of the joint part 6 of the oblique member 3 and the supporting face 5 and the joint part 7 of the oblique member 3 and the horizontal member 4, and a mechanism for absorbing force in the axial direction of the oblique member 3 is provided in the joint part 7 of the oblique member 3 and the horizontal member 4 to absorb twisting of the frame and three-dimensional entanglement of the joint parts 6, 7 caused by travel in the horizontal direction. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an open / close tent, and more particularly, to an open / close tent having an opening / closing mechanism for pushing and folding a membrane material.

  The tent is also called awning, and is mainly attached to a garden or a window of a house or a store, etc., and controls sunlight when it is fine, and is used as a rain guard when it rains. Generally, it is composed of a translucent film material and a frame that supports the film material. For example, a Teflon (registered trademark) film or the like is used as the film material, and a structural material such as a steel pipe, an aluminum pipe, or wood is used as the frame.

  The openable tent refers to a tent that has a mechanism for projecting when a film material is necessary, and folding it when it is not necessary. This takes advantage of the flexible and foldable characteristics of the membrane material used in the tent. Some large-scale open / close tents have a mechanism for moving a support member using a driving device, but small-scale open / close tents are generally manually operated to open and close manually.

  The openable tent may be attached to the rear part of a vehicle such as a truck, for example. When an operator performs unloading and unloading work on a loading platform such as a truck, the operator and the luggage are Used as a shading and rain guard. In this case, the openable tent is usually folded and stored in the rear part of a truck or the like, or removed and stored in the loading platform of the vehicle, and moves with the vehicle. In the unloading and unloading operations, the membrane material is pushed out and folded up each time.

  FIG. 1 shows a schematic diagram of an openable tent provided in a vehicle such as a truck. The frame that supports the membrane material is composed of two diagonal members attached to a vehicle body such as a truck as a support surface, and a cross member that connects the diagonal members. The film material has a substantially quadrangular shape, and the vicinity of one side is attached to a cross member, and the other end opposite to the film material is provided on a support attached to a vehicle body such as a truck. The joint part between the diagonal member and the support surface and the joint part between the diagonal member and the cross member are provided with a rotation mechanism in the axial rotation direction of the cross member. Squeeze and convolution.

  An open / close tent provided on a vehicle such as a truck is used as a sunshade and rain shield for workers and luggage, and therefore requires a width approximately equal to the width of the vehicle. In addition, the depth is longer than that of an openable tent used in a normal house, store, or the like because it covers the range in which an operator handles luggage. Therefore, the frame is originally required to have a certain degree of rigidity. However, because it is housed in a vehicle such as a truck, it affects the fuel consumption of the vehicle, and due to the demands of design, the frame material is composed of only the minimal and lightweight diagonal and cross members. . Further, as described above, the joint portion between the diagonal member and the cross member is provided with a rotation mechanism, and is a pin joint that does not bear a bending moment. In other words, the frame of an openable tent provided on a vehicle such as a truck is a very low-rigidity frame without braces or stiffeners, and has a characteristic that the shape is maintained by the in-plane rigidity of the film material. .

FIG. 2 is a schematic explanatory view of the joint portion between the diagonal member and the cross member and between the diagonal member and the support surface. As will be described later, three-dimensional rotation and movement occur at the joints at both ends of the diagonal member of the openable tent. Here, this three-dimensional rotation and movement is decomposed into three-dimensional components defined in the axial direction of the diagonal member and the cross member. The rotation generated at the joint between the diagonal member and the cross member is not limited to the above-described axis (R ₁ ) of the cross member, but around the axis (R ₂ ) substantially orthogonal to the axis of the cross member and the axis of the diagonal member. And three rotational components orthogonal to each other around the axis of the diagonal member (R ₃ ). In addition, the movement generated at the joint between the diagonal member and the cross member is the axial direction (D ₁ ) of the cross member, the axial direction (D ₂ ) substantially perpendicular to the axis of the cross member and the axis of the diagonal member, and the diagonal member. Are decomposed into three directional components orthogonal to each other in the axial direction (D ₃ ). Similarly, the rotation generated at the joint between the diagonal member and the support surface is also decomposed into a total of three rotation components. In addition, since the diagonal member is fixed to the support surface at the joint portion between the diagonal member and the cross member, the joint portion does not move.

  On the other hand, Patent Document 1 discloses an awning that includes a folded arm and a front frame, and allows the sheet member to be wound by adjusting the vertical angle of the tension arm. No. 2 discloses an awning that raises the base end portion of an arm along a slide rail attached to an outer wall when the sunshade sheet is extended.

JP-A-8-246629 Japanese Patent Laid-Open No. 2003-268843

  As described above, the manual squeezing and folding of the open / close tent membrane is performed by rotating the shaft of the cross member provided at the joint between the diagonal member and the support surface and at the joint between the diagonal member and the cross member. This is done using a direction rotation mechanism. However, this rotating mechanism functions normally when the diagonal members on both sides are simultaneously pushed out and folded by rotating at substantially the same angle. Normally, when these operations are carried out by one person, the two diagonal members are alternately rotated and pushed out or folded. At this time, the frame constituted by the cross member and the diagonal member of the openable tent is largely twisted. As a result of this kinking, a three-dimensional rotational force and an axial force that causes forced deformation are applied to each joint portion of the cross member and the diagonal member, which causes “three-dimensional kinking”. Due to this twisting, the bolts are damaged or loosened at each joint, and the opening / closing tent becomes unusable by repeating the opening / closing operation.

  Further, when a strong wind blows on the openable tent with the tent opened, a blowing force or a blowing force acts on the film surface, and at the same time, a wind pressure acts on the cross member and the diagonal member. The rigidity with respect to these pressures is only the planar rigidity of the membrane surface, and the openable tent is largely twisted as a whole. This kinking produces the same effect as described above, and the openable tent becomes unusable. In addition, when a seismic force is applied to the openable tent with the tent open, the frame composed of the cross member and the diagonal member of the openable tent is greatly shaken, and is greatly twisted as a whole of the openable tent. This kinking produces the same effect as described above, and the openable tent becomes unusable.

  Further, when the openable tent is attached to the rear part of the vehicle such as a truck, the frame constituted by the horizontal member and the diagonal member of the openable tent is largely kinked due to the rolling or vertical shaking caused by the running of the vehicle. Since the rigidity of the frame against lateral force is extremely small, the entire openable tent is kinked. This kinking produces the same effect as described above.

  Patent Documents 1 and 2 do not disclose a mechanism for eliminating these three-dimensional twists.

  The purpose of this application is to solve this problem and to eliminate the three-dimensional kink of the joints caused by the frame kinking and horizontal movement when opening and closing the openable tent, thereby improving functionality and durability. It is to provide a retractable tent.

  In order to achieve the above object, an openable tent according to the present invention comprises two diagonal members supported at one end by a support surface, a cross member connecting the other ends of the diagonal member, and a cross member in the vicinity of one side. A substantially quadrangular membrane material attached to a horizontal member provided on the support on the other side opposite to each other, and a joint portion between the diagonal member and the support surface, and the diagonal member and the horizontal member. And an opening / closing tent that pushes out and folds the membrane material by a rotation mechanism in the axial rotation direction of the transverse member provided on the joining portion of the oblique member and the support member. A rotation mechanism in a rotational direction of a shaft substantially orthogonal to the axis of the cross member and the diagonal member provided at the joint portion with the cross member, the joint portion of the diagonal member and the support surface, and the diagonal member and the cross member And a mechanism for absorbing a rotational force generated around the axis of the diagonal member, provided at at least one of the joint portions.

  Further, the openable tent preferably includes a mechanism for absorbing the axial force of the diagonal member.

  In addition, the openable tent has a rotation direction of an axis substantially perpendicular to the axis of the cross member and the axis of the diagonal member provided at the joint part of the diagonal member and the support surface and the joint part of the diagonal member and the cross member. The rotation mechanism is preferably a hinge that is fastened by a bolt and a nut.

  In addition, the openable tent has a rotating mechanism in the axial direction of the cross member. The plate member at the end of the joint between the diagonal member and the cross member and the plate member at the opposite end of the cross member can be rotated by bolts and nuts. The mechanism that absorbs the rotational force generated around the axis of the diagonal member has a curved surface formed by one surface of the spacer inserted between the plate members and the surface of the end plate member facing the hinge. It is preferable that the bolt hole is in contact with the bolt, the bolt hole is a long hole in the rotation direction with respect to the bolt diameter, and the bolt can follow the rotation.

  In addition, the openable tent has a mechanism for absorbing the rotational force generated around the axis of the diagonal material, and one surface of the spacer inserted between the plate materials and the surface of the end plate material facing the spacer are cylindrical. A curved surface is preferred.

  In the openable tent, the mechanism for absorbing the rotational force generated around the axis of the diagonal member is preferably such that the opposing surfaces of the plate member are in contact with each other by a spherical surface.

  In the openable tent, the mechanism that absorbs the rotational force generated around the axis of the diagonal member is preferably a hinge formed by a bolt and a nut.

  In the openable tent, the mechanism for absorbing the axial force of the diagonal material is the axial direction of the diagonal material in the bolt hole of the rotating mechanism of the rotation direction of the axis substantially perpendicular to the axis of the horizontal material and the diagonal material. A long hole is preferred.

  In the openable tent, the cross member and the diagonal member are preferably tubular members.

  With the above configuration, rotation of the cross member in the axial rotation direction of the cross member provided at the joint portion between the diagonal member and the support surface and the joint portion between the diagonal member and the cross member that enables the membrane material to be pushed out and folded. In addition to the mechanism, it is possible to eliminate the “three-dimensional kink” at each joint between the cross member and the diagonal member.

  In other words, when a lateral force is received during an earthquake or a strong wind, or when an axial force that causes a forced deformation occurs when the vehicle is swayed during driving, The frame of the openable tent can be moved in a substantially parallelogram shape by the rotation mechanism of the rotation direction of the shaft of the cross member and the shaft of the cross member substantially orthogonal to the shaft of the cross member provided at the joint between the cross member and the cross member. It becomes. Therefore, it is possible to cope with the rotational force generated at the joint and the axial force that causes forced deformation without causing the twist due to the lateral movement of the joint.

  In addition, the frame is largely kinked when the film material is pushed out and folded, and this kinking generates a rotational force around the axis of the diagonal material. In response to this rotational force, a mechanism for absorbing rotational force generated around the axis of the diagonal member provided at at least one of the joint portion between the diagonal member and the support surface and the joint portion between the diagonal member and the cross member. Thus, this rotational force can be absorbed. Therefore, it becomes possible to push out and fold the film material without causing kinking due to kinking of the joint portion.

  Further, when the film material is pushed out and folded, an axial force is generated that causes the diagonal material to be axially deformed due to the kinking of the frame. This axial force is eliminated by slippage by a mechanism that absorbs the axial force of the diagonal material. Therefore, the film material can be ejected and folded without causing the joint to be twisted due to the twist of the joint.

  Further, the rotational force generated around the axis of the diagonal member is such that one surface of the spacer inserted between the plate members constituting the rotation mechanism in the axial rotation direction of the cross member and the surface of the end plate member opposed thereto are curved surfaces. The bolt can follow the rotation by the long hole of the bolt hole, and can absorb the rotational force. Further, the rotational force generated around the axis of the diagonal material can be absorbed even if the two opposing surfaces are cylindrical curved surfaces. Further, it is possible to absorb the fact that the opposing surfaces of the plate members constituting the rotation mechanism of the transverse member in the axial rotation direction are in contact with the spherical surface so as to be rotatable. Furthermore, the rotational force generated around the axis of the diagonal material can be absorbed even if the mechanism that absorbs the rotational force generated around the axis of the diagonal material is a hinge using a bolt and a nut. Therefore, with these configurations, the film material can be pushed out and folded without causing the joint to be twisted due to the twist of the joint.

  As described above, according to the open / close tent according to the present invention, it is possible to eliminate the kinking at the time of opening and closing of the frame constituting the open / close tent and the three-dimensional kink of the joint portion caused by the movement in the horizontal direction. It becomes possible to improve the functionality and durability of the tent.

  Embodiments according to the present invention will be described below in detail with reference to the drawings.

  FIG. 3 shows a schematic configuration of one embodiment of the openable tent according to the present invention. The openable tent 1 includes a film material 2, an oblique material 3 that supports the film material 2, and a cross material 4. The lower end portion of the diagonal member 3 is attached to a support surface 5 installed on a loading platform of a vehicle body such as a truck at a joint portion 6. The upper end of the diagonal member 3 is connected to the cross member 4 at the joint 7. Details of the joints 6 and 7 are omitted in FIG. 3 and will be described later. The membrane material 2 is attached to the cross member 4 on one side, and the other side is connected to a support 8 installed on a vehicle body such as a truck such as a winder of the membrane material 2. Details of the connection between the support 8 and the vehicle body such as a truck are omitted.

  The film material 2 may be of any type as long as it is used for a general tent or awning film material such as a Teflon (registered trademark) film. Further, for the diagonal member 3 and the cross member 4, for example, a structural material such as a steel pipe, an aluminum pipe, or wood is used. Moreover, although the steel pipe is used for the cross-sectional shape of these structural materials in this embodiment, for example, a hollow member such as a square steel tube, a solid member such as a steel bar or wood, or an angle material or a channel material. An open cross-section member such as a shape steel may be used.

(Rotation mechanism for opening and closing the membrane material)
FIG. 4 shows a schematic view of the openable tent as seen from the side. The diagonal member 3 is connected to a cross member 4 and a support surface 5 (not shown), and the film member 2 is attached to the cross member 4. The joints 6 and 7 at both ends of the diagonal member 3 are provided with a rotation mechanism by a hinge that can rotate around the axis of the cross member 4 (R ₁ ). Among these, the hinge of the junction part 6 rotates as a fulcrum, so that the membrane material 2 can be pushed out and folded. Moreover, when the hinge of the junction part 7 rotates, the transverse member 4 can be freely rotated without being restrained by the membrane member 2 when the membrane member 2 is pushed out and folded.

FIG. 5A shows a schematic cross-sectional view of one embodiment of a rotating mechanism around the axis (R ₁ ) of the cross member 4 at the joint 7 between the diagonal member 3 and the cross member 4. The end plate 10 of the cross member 4 and the end plate 11 provided at the joint 7 face each other, and these plates 10 and 11 are rotatably fastened by bolts 12 and nuts 13 to form a hinge. . This rotation mechanism is the same in the joint portion 6 between the diagonal member 3 and the support surface 5.

(Rotating mechanism of joint against lateral force)
FIG. 6A is a schematic view of the openable tent as viewed from the front, and FIG. 6B is an explanatory diagram. Since the openable tent 1 basically performs only the opening / closing operation of the film material 2 described above, no other rotation mechanism is required in principle. However, when a lateral force is applied during an earthquake or a strong wind, or when a vehicle is swayed during the running of the vehicle, as shown in FIG. The frame is deformed into a substantially parallelogram.

When there is no rotation mechanism of the joint portion with respect to this lateral force, a rotational force is generated in the joint portions 6 and 7 around the axis (R ₂ ) substantially orthogonal to the axis of the cross member 4 and the axis of the diagonal member 3. Further, the rotational force causes the bolts 12 of the joint 7 to be twisted and damage or loosening occurs. That is, as shown in FIG. 5B, in the joint portion 7, the end plate 10 of the cross member 4 and the end plate 11 of the joint portion 7 use this rotational force to make one end an insulator and the other end. Separate. At this time, the lateral force F is resisted by the shaft of the bolt 12 and the bolt hole 9 striking each other. This causes a stress that is not originally assumed in the shaft of the high-strength bolt, which causes damage to the bolt 12. Further, the bolt 12 is loosened by the nut 13 being twisted. On the other hand, the lateral force F can be resisted by the horizontal rigidity in the plane of the membrane material 2. However, the film material 2 is not originally a structural material, and if excessive stress occurs, the film material 2 is broken. Moreover, damage occurs in the portion where the membrane material 2 is attached to a support material such as the cross member 4.

The joints 6 and 7 include a rotation mechanism (R ₂ ) around the axis substantially orthogonal to the axis of the cross member 4 and the axis of the diagonal member 3 that absorbs the rotational force generated by the lateral force F. FIG. 7 shows a schematic cross-sectional view of one embodiment of this rotating mechanism at the joint 6. The end plate 15 of the diagonal member 3 sandwiched between the two connection plates 14 connected to the support surface 5 is rotatably fastened by bolts 12 and nuts 13 to form a hinge. This rotation mechanism is the same at the joint 7 between the diagonal member 3 and the cross member 4.

(Rotation mechanism around the axis of diagonal materials)
FIG. 8 is an explanatory diagram showing the kinking of the frame when the membrane material 2 is pushed out and folded. That is, the state of deformation of the frame is shown when the operator rotates and moves the two diagonal members 3 alternately to perform the ejection and convolution of the membrane material 2. One diagonal member 3 is more rotationally moved than the other diagonal member 3, and as shown in FIG. 8, the transverse member 4 that moves essentially horizontally is inclined three-dimensionally. At this time, both of the two diagonal members 3 are twisted around the axis of the diagonal member 3.

In this case the diagonal members 3 there is no mechanism for absorbing the twisting occurs, the junction 6 and 7, the rotational force is generated to cause the twisted diagonal member 3 about the axis of the diagonal members 3 (R _3). FIG. 9 is a schematic cross-sectional view showing the twist of the bolt 12 due to the rotational force around the axis of the diagonal member 3 (R ₃ ).
Further, the rotational force causes the bolts 12 of the joint 7 to be twisted and damage or loosening occurs. That is, as shown in FIG. 9B, in the joint portion 7, the end plate 10 of the cross member 4 and the end plate 11 of the joint portion 7 use this rotational force to make one end an insulator and the other end. Are separated. At this time, the lateral force F is resisted by the shaft of the bolt 12 and the bolt hole 9 striking each other. This causes damage and loosening of the bolt 12 as described above.

As will be described later, the joint 6 or 7 includes a mechanism that absorbs rotational force generated around the axis of the diagonal member 3 (R ₃ ). The twist generated in the diagonal member 3 only needs to have a mechanism for absorbing the rotational force in at least one of the joint portions 6 and 7 at both ends of the diagonal member 3. FIG. 10 shows a schematic cross-sectional view of one embodiment of a mechanism for absorbing the rotational force around the axis of the diagonal member 3 (R ₃ ) at the joint 7, for example.

FIG. 10A shows a schematic cross-sectional view when the spacer 20 is inserted between the end plate 10 of the cross member 4 and the end plate 11 of the joint 7. The opposing surfaces of the end plate 10 and the spacer 20 are substantially flat. On the other hand, the opposing surfaces of the end plate 11 and the spacer 20 are respectively cylindrical curved surfaces. Therefore, the rotation mechanism around the rotation axis (R ₁ ) of the cross member 4 functions by the opposing surfaces of the end plate 10 and the spacer 20. Further, the mechanism for absorbing the rotational force around the axis of the diagonal member 3 (R ₃ ) functions by the end plate 11 and the opposing surface of the spacer 20. In FIG. 10A, the cylindrical curved surface of the spacer 20 is provided on a surface facing the end plate 11, but may be a surface facing the end plate 10. In that case, the rotation mechanism around the rotation axis (R ₁ ) of the cross member 4 functions by the opposing surfaces of the end plate 11 and the spacer 20. Furthermore, a mechanism for absorbing the rotational force around the axis of the diagonal members 3 (R _3), the end plate 10, and function by opposing surfaces of the spacer 20.

FIG. 10B shows a schematic cross-sectional view when the end plate 10 of the cross member 4 and the end plate 11 of the joint 7 have opposing spherical surfaces. In this case, the above-described spacer 20 is not necessary. That is, since the opposing surfaces of the end plate 10 and the end plate 11 are both spherical surfaces, the rotation mechanism around the rotation axis of the cross member 4 (R ₁ ) and the axis around the oblique member 3 (R ₃ ). Each mechanism that absorbs the rotational force functions by this spherical surface.

The mechanism for absorbing the rotational force around the axis of the diagonal member 3 (R ₃ ) is that at least one bolt hole 9 of the end plates 10 and 11 is long in the rotational direction with respect to the bolt diameter. It can be rotated by being a hole. That is, with respect to the rotational force around the axis of the diagonal member 3 (R ₃ ), the cylindrical surface and the spherical surface are displaced from each other facing each other. This deviation is absorbed by the clearance of the bolt hole 9 with respect to the bolt diameter. The rotational force around the axis of the diagonal member 3 (R ₃ ) is a torsional moment with respect to the diagonal member 3, and is absorbed by slightly rotating, unlike the bending moment that is another rotational force. Therefore, this clearance can be sufficiently achieved by making the bolt hole 9 a long hole. In the present embodiment, a mechanism for absorbing the rotational force around the axis of the diagonal member 3 (R ₃ ) is incorporated in the rotational mechanism around the axis of the cross member 4 (R ₁ ). In order to prevent the bolt 12 from loosening due to the bolt 12 sliding between the long holes of the bolt hole 9, a double nut is preferable.

For example, rubber or a viscoelastic material may be inserted into the gap 18 between the opposing cylindrical surfaces in FIG. 10A and the spherical face 19 in FIG. When rubber is inserted, an effect of reducing the impact caused by vibration can be obtained with respect to the rotational force around the axis of the diagonal member 3 (R ₃ ). Moreover, when a viscoelastic material is inserted, it becomes a damping damper. That is, the rotational force around the axis of the diagonal member 3 (R ₃ ) causes shear deformation in the viscoelastic material, but this shear deformation causes a damping effect and absorbs vibration energy. Further, in order to make the rotation smooth, for example, a stainless steel plate having a low surface friction coefficient is sandwiched between the gap 18 on the opposite cylindrical surface in FIG. 10A and the gap 19 on the opposite spherical surface in FIG. But it ’s okay.

FIG. 11 shows a schematic cross-sectional view in the case where the mechanism that absorbs the rotational force around the axis of the diagonal member (R ₃ ) is the bolt 12 and the nut 13. This rotating mechanism is provided between the diagonal member 3 and the joint 7 and is similar to the rotating mechanism around the axis of the cross member 4 (R ₁ ). The end plate 17 of the diagonal member 3 and the end plate 16 of the joint portion 7 face each other and are fastened by a bolt 12 and a nut 13 so as to be rotatable.

(Mechanism for absorbing the axial force of diagonal materials)
Of the three-dimensional movement components at both ends of the diagonal member 3 shown in FIG. 2, the axial movement component (D ₁ ) of the horizontal member 4 is fixed because the joint 6 of the diagonal member 3 is fixed. It can be absorbed by rotation around the axis (R ₂ ) substantially orthogonal to the axis 4 and the axis of the diagonal member 3. Further, the axial movement component (D ₂ ) substantially orthogonal to the axis of the cross member 4 and the axis of the diagonal member 3 is also fixed around the axis of the cross member 4 (R ₂ ) since the joint 6 of the diagonal member 3 is fixed. _It can be absorbed by the rotation of ₁ ). However, the axial movement component (D ₃ ) of the diagonal member 3 cannot be absorbed by another rotating mechanism.

  As shown in FIG. 8, when the frame is kinked when the membrane material 2 is pushed out and folded, there is a difference in vertical position between the two diagonal materials 3. At this time, the diagonal member 3 generates an axial force that forcibly deforms the two diagonal members 3 via the cross member 4. This axial force acts in a direction that reduces the difference in position.

  When there is no mechanism for absorbing the axial force of the diagonal 3, the diagonal 3 is deformed in the axial direction. However, the diagonal member 3 can be deformed only slightly in the axial direction. Therefore, when there is no mechanism for absorbing the axial force of the diagonal member 3, a forcing force is generated in the diagonal member 3 in the axial direction at the joint 7. The above-described rotating mechanism and the mechanism that absorbs the rotational force cannot absorb this forcing force, causing damage or loosening of the bolt 12 at the joint 7.

  The joint 7 includes a mechanism that absorbs the axial force of the diagonal member 3. FIG. 12 shows a schematic cross-sectional view of one embodiment of a mechanism for absorbing the axial force provided on the diagonal member 3. In the hinge of the joint 7 between the diagonal member 3 and the cross member 4, the bolt hole 9 of the bolt 12 is elongated in the axial direction of the diagonal member 3, so that the diagonal member 3 is axially deformed in the axial direction. Absorb power. The long hole provided in the bolt hole 9 is opened to a range in which the axial force generated in the diagonal member 3 can be absorbed.

It is the schematic of the opening-and-closing type tent provided in vehicles, such as a truck. It is explanatory drawing showing the rotation and the movement component of the junction part of the both ends of an oblique material. It is a figure showing the composition of the outline of one embodiment of the opening-and-closing type tent concerning the present invention. It is the schematic which looked at the opening-and-closing type tent from the side. Rotation mechanism around the axis of the crosspiece (R _1), and is a schematic sectional view showing a bolt twisting of by rotation of the crosspiece axis and about an axis substantially perpendicular to the axis of the diagonal members (R _2). It is the schematic and explanatory drawing which looked at the opening-and-closing type tent from the front. At the junction between the diagonal member and the support surface is a schematic sectional view showing a rotation mechanism of the axis (R ₂₎ substantially perpendicular to the axis of the shaft and the swash material crosspieces. It is explanatory drawing showing the twist of the flame | frame at the time of the protrusion and convolution of a film | membrane material. Rotation mechanism of the crosspiece axis (R _1), and is a schematic sectional view showing a torsion of the bolt by rotation force around the axis of the diagonal member (R _3). It is a schematic cross-sectional view of an embodiment of a mechanism for absorbing the rotational force generated in the axis (R ₃₎ of the diagonal member. It is a schematic sectional view showing another embodiment of a mechanism for absorbing the rotational force generated in the axis (R ₃₎ of the diagonal member. It is a schematic sectional drawing which shows the axial direction force absorption mechanism of a diagonal.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 Opening-closing tent, 2 Membrane material, 3 Diagonal material, 4 Horizontal material, 5 Support surface, 6 Joint part of diagonal material and support surface, 7 Joint part of diagonal material and lateral material, 8 Support body, 9 Bolt hole 10 End plate of cross member, 11, 16 End plate of joint, 12 bolt, 13 nut, 14 Connection plate, 15, 17 End plate of diagonal member, 18 Gap of cylindrical surface, 19 Gap of spherical surface, 20 Spacer.

Claims (9)

Two diagonal members supported at one end on the support surface, a cross member connecting the other ends of the diagonal member, a side member attached to the cross member in the vicinity of one side, and a side member provided on the support member on the other side. A substantially quadrangular membrane material attached to the frame material, and a joint portion between the diagonal member and the support surface, and a joint portion between the diagonal member and the cross member, in the axial rotation direction of the cross member. An openable tent that pushes and folds membrane material by a rotating mechanism,
A rotation mechanism in the rotational direction of the shaft of the cross member and the shaft substantially orthogonal to the shaft of the cross member provided at the joint portion of the diagonal member and the support surface and the joint portion of the diagonal member and the cross member;
A mechanism for absorbing the rotational force generated around the axis of the diagonal member, provided at at least one of the joint portion of the diagonal member and the support surface and the joint portion of the diagonal member and the cross member;
An openable tent characterized by comprising:   2. The openable tent according to claim 1, further comprising a mechanism that absorbs the axial force of the diagonal material.   The open / close tent according to claim 1 or 2, wherein the shaft of the cross member and the shaft of the cross member provided at the joint portion of the diagonal member and the support surface and the joint portion of the diagonal member and the cross member are substantially omitted. An opening / closing tent characterized in that the rotation mechanism in the rotation direction of the orthogonal shaft is a hinge that is rotatably fastened by a bolt and a nut. The openable tent according to any one of claims 1, 2, and 3,
The rotation mechanism in the axial direction of the cross member is a hinge in which the plate member at the end of the joint portion between the diagonal member and the cross member and the plate member at the opposite end of the cross member are rotatably fastened by bolts and nuts. ,
The mechanism that absorbs the rotational force generated around the axis of the diagonal material is such that one surface of the spacer inserted between the plate materials and the surface of the end plate material facing it are in contact with each other so as to be rotatable by a curved surface. An openable tent characterized by a long hole in the rotational direction with respect to the bolt diameter, and the bolt can follow the rotation.   In the open / close tent according to claim 4, the mechanism for absorbing the rotational force generated around the axis of the diagonal member includes one surface of the spacer inserted between the plate members, and the surface of the end plate member opposed thereto, An openable tent characterized by a cylindrical curved surface.   The open / close tent according to any one of claims 1 to 3, wherein the mechanism for absorbing the rotational force generated around the axis of the diagonal material is such that the opposing surfaces of the plate material are rotatably in contact with each other by a spherical surface. Features a retractable tent.   4. The open / close tent according to claim 1, wherein the mechanism for absorbing the rotational force generated around the axis of the diagonal member is a hinge formed by a bolt and a nut.   The open / close tent according to any one of claims 1 to 7, wherein the mechanism for absorbing the axial force of the diagonal member is a rotating mechanism in a rotational direction of an axis substantially perpendicular to the axis of the cross member and the axis of the diagonal member. An openable tent characterized in that the bolt hole is a long hole in the axial direction of the diagonal member with respect to the bolt diameter.   9. The openable tent according to any one of claims 1 to 8, wherein the cross member and the diagonal member are tubular members.

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