Fasteners, and loading platform including fasteners

Abstract

The objective is to provide a fastener that allows two members of different thicknesses to be slidably connected, and which enables switching between fixing and releasing the members with simpler operation, as well as a cart that includes this fastener. [Solution] The present invention solves the above problem and provides a fastener X capable of fixing a large cross section pipe 13 and a small cross section member 43 that can be attached in an axial direction substantially parallel to the large cross section pipe 13, comprising a fixing part 5 that can be fixed to the large cross section pipe 13 and a movable part 6 that can fix and release the small cross section member 43, wherein the movable part 6 has a tightening part 61 that can surround and tighten the side surface of the small cross section member 43 and an operating part 62 that can operate the tightening part 61.

Description

Technical Field

[0001] The present invention relates to a fixture for making two tubular or columnar members with different thicknesses fixed or slidable, and a carrier vehicle to which the fixture is applied.

Background Art

[0002] Among carrier vehicles capable of transporting goods such as containers, there are those provided with a handle that can be pulled from the front or a frame that prevents the load from falling.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] The carrier vehicle described in Patent Document 1 is provided with a tip locking member and a side locking member so as to project from the vehicle body, and each locking member is provided so as to be able to advance and retreat (pull out or push in by sliding) with respect to the vehicle body, and is fixed by screwing. However, in this configuration, when the user adjusts the position of each locking member, it is necessary to turn the screw many times, which not only lengthens the working time, but also requires a large force to be applied to the screw part during fastening, resulting in a large amount of labor other than the transportation work.

[0005] In view of the above problems, an object of the present invention is to provide a fixture that can slidably connect two members with different thicknesses and can switch between fixing and releasing between the members by a simpler operation, and a carrier vehicle including the fixture.

Means for Solving the Problems

[0006] The present invention, which solves the above problems, is a fastener capable of fixing a large cross-section pipe and a small cross-section member that can be attached in an axial direction substantially parallel to the large cross-section pipe, comprising a fixing part that can be fixed to the large cross-section pipe and a movable part that can fix and release the small cross-section member, wherein the movable part has a clamping part that can surround and clamp the side surface of the small cross-section member and an operating part that can operate the clamping part. This configuration allows two members of different thicknesses to be slidably connected, and enables switching between fixing and releasing the members with simpler operation.

[0007] In a preferred embodiment of the present invention, the fixed portion and the movable portion are provided adjacent to each other in the axial direction. This configuration allows for the stable connection of two members with different thicknesses.

[0008] In a preferred embodiment of the present invention, the operating portion is rotatably mounted on a single pivot axis and integrally comprises an operating portion body extending away from the pivot axis and a contact portion that contacts the tightening portion, wherein the distance from the pivot axis to the contact position where the contact portion contacts the tightening portion varies depending on the location. This configuration allows for easy and intuitive switching between a fixed state and a sliding state for two members of different thicknesses.

[0009] In a preferred embodiment of the present invention, the pivot axis is substantially parallel to the axial direction, the operating unit is capable of switching between a tightening state in which the cross section perpendicular to the axial direction inside the tightening unit is aligned with the cross section of the small cross section member, and a loosening state in which the cross section perpendicular to the axial direction inside the tightening unit is larger than that inside the tightening unit, and the distance from the pivot axis to the contact position in the loosening state is shorter than the distance from the pivot axis to the contact position in the tightening state. This configuration allows for switching between a fixed or sliding state of two members with different thicknesses, using a simple structure and minimal labor.

[0010] In a preferred embodiment of the present invention, a cart including the fastener comprises a cart having a loading plate for carrying cargo, wheels for making the cart movable, a handle portion provided along one side of the cart, and a frame portion extending from the other side of the cart, wherein the large cross-section pipe is provided on the cart, the small cross-section member is included in the frame portion and is further attached to the cart so as to be slidable in the direction of approaching or moving away from the cart. This configuration allows for easy switching between fixed and sliding states of the frame.

[0011] In a preferred embodiment of the present invention, a plurality of frame portions are provided for a single cargo bed. This configuration allows for easy modification of the loading area for items and the auxiliary operation of the cart using the frame, depending on the application.

[0012] In a preferred embodiment of the present invention, the large-section pipe includes one that is provided along the top surface of the cargo bed. This configuration allows for a large surface area on the cart for stably placing goods, while also making the frame slidable.

[0013] In a preferred embodiment of the present invention, the large cross-section pipe provided along the top surface of the cargo bed has a substantially rectangular cross-section including a planar portion substantially parallel to the top surface. This configuration allows the sliding mechanism of the frame to be constructed using simple and easy-to-manufacture components.

[0014] In a preferred embodiment of the present invention, the large cross-section pipe having a rectangular cross-section is provided with a substantially circular cross-section at its open end. This configuration allows fasteners corresponding to a circular cross-section to be easily applied to pipe members of other shapes and to trucks containing such pipe members. [Effects of the Invention]

[0015] The present invention for solving the above problems provides a stopper that slidably connects two members with different thicknesses and can switch between fixing and releasing between the members by a simpler operation, and a carrier truck including the stopper.

Brief Description of the Drawings

[0016] [Figure 1] It is a perspective view showing the configuration of a carrier truck including a stopper according to an embodiment of the present invention. [Figure 2] It is a perspective view from another direction showing the configuration of a carrier truck including a stopper according to an embodiment of the present invention. [Figure 3] It is a front view showing the configuration of a carrier truck including a stopper according to an embodiment of the present invention. [Figure 4] It is a side view showing the configuration of a carrier truck including a stopper according to an embodiment of the present invention. [Figure 5] It is a perspective view showing a modified configuration of a carrier truck including a stopper according to an embodiment of the present invention. [Figure 6] It is an explanatory view showing the configuration of a stopper according to an embodiment of the present invention. [Figure 7] It is an explanatory view showing an example of use and a state of use of a stopper according to an embodiment of the present invention.

Modes for Carrying Out the Invention

[0017] Hereinafter, the stopper X and the carrier truck Y according to each embodiment of the present invention will be described with reference to the drawings. The description will detail the configuration of the embodiment, the method of implementation, and other examples in this order. However, for convenience of explanation, the carrier truck Y and the stopper X will be described in this order. Note that each of the embodiments shown below is an example of the present invention, and the present invention is not limited to the following embodiments.

[0018] ≪Embodiment≫ As shown in Figure 1, the cargo cart Y according to this embodiment comprises a cargo bed 1 on which goods (luggage) can be placed, wheels 2 that make the cargo bed 1 movable, a handle portion 3 provided along one side of the cargo bed 1, and a frame portion 4 extending from the other side of the cargo bed 1. Fasteners X are appropriately provided at the points where the frame portion 4 is attached to the cargo bed 1. In the following description, the directions "up and down," "front and back," and "left and right" refer to the coordinate axes shown in Figure 1.

[0019] The loading platform 1 is a loading area on which articles can be placed, and in this embodiment, it has a loading plate 11, a raised portion 12, a large cross-section pipe 13, and a locking piece 14.

[0020] The mounting plate 11 is a flat plate-shaped member that forms the main part of the loading platform 1 and has sufficient strength to support and support items such as containers. In this embodiment, the mounting plate 11 has a substantially rectangular shape with sides in the front-rear and left-right directions (mathematically, this includes not only rectangles in geometric terms, but also those with rounded corners or chamfers, and slight errors in orthogonality and straightness; the same applies hereinafter). Furthermore, it is preferable that the mounting plate 11 has a large number of weight-reducing holes in the vertical direction. With such a configuration, it is possible to make it a shape that can accommodate items such as containers and further reduce the overall weight of the loading platform Y.

[0021] The raised portion 12 is a member that raises the mounting plate 11 to a predetermined height. In this embodiment, as shown in Figures 3 and 4, it is a frame-like member or frame that supports the mounting plate 11 at a height that does not interfere with the wheels 2.

[0022] The large cross-section pipes 13 are tubular (or cylindrical) members provided along the front and rear or left and right sides and / or on the underside of the mounting plate 11, and slidably attach the frame portion 4, described later, to the loading platform 1. In this embodiment, as shown in Figures 1 and 2, the large cross-section pipes 13 are provided in pairs in the front-to-back direction along the left and right sides of the mounting plate 11, and further in pairs in the left-to-right direction along the underside of the mounting plate 11. In the following description, the length direction of the large cross-section pipes 13 will be referred to as the axial direction.

[0023] Of the large cross-section pipes 13, those provided along the edges of the mounting plate 11, that is, a pair of large cross-section pipes 13 provided in the front-to-back direction along the left and right edges of the mounting plate 11, preferably have a substantially rectangular cross-section that includes a flat portion at its uppermost part that is substantially flush with the top surface of the mounting plate 11. With such a configuration, a large area for placing items on the loading platform 1 can be secured, and the frame portion 4 can also be attached to the loading platform 1.

[0024] The locking piece 14 is a claw-shaped member provided on the lower surface of the mounting plate 11, and is capable of locking a linear member (or string-like member) that is wrapped around the mounting plate 11 from the upper side to the lower side. Furthermore, as shown in Figures 2 and 4, the locking pieces 14 are provided in pairs at the left and right ends of the lower surface of the mounting plate 11, and multiple such pairs are provided in the front-to-back direction. With this configuration, a string can be attached to an item placed on the mounting plate 11, and the string can be easily tied to the locking piece 14 to secure it.

[0025] Wheel 2 is a mobility mechanism that makes the cargo cart Y (cargo bed 1) movable, and in this embodiment, it is an assembly having an axle 21 and rolling elements 22. The axle 21 is a columnar or cylindrical member fixedly connected in the left-right direction at the lowest part of the raised section 12, and two or more are provided spaced apart in the front-rear direction. The rolling elements 22 are members that are provided in pairs at both ends of the axle 21 so as to be rotatable with respect to the axle 21, and are general tires that are basically cylindrical in shape.

[0026] The handle section 3 is provided at the rear end of the cargo bed 1 and includes a handle body 31 that can be gripped by the user, and a folding base section 32 that foldably connects the handle body 31 to the cargo bed 1.

[0027] The handle body 31 is a gate-shaped frame member (or frame) with a beam at a predetermined height (for example, a height assumed to be around the user's waist) when it is in an upright position relative to the cargo bed 1, making it easy to push and move (maneuver) the cargo cart Y. The handle body 31 is also connected to the cargo bed 1 via a folding base 32. Specifically, as shown in Figure 4, the handle body 31 is designed to be switchable between the upright position and a folded position where it is laid down along the top surface of the cargo bed 1.

[0028] The folding base section 32 is a base that surrounds the base of the handle body 31 and connects to the cargo bed 1, and a pair of them are provided at the rear end of the cargo bed 1, spaced apart in the left-right direction. The folding base section 32 also includes a folding pivot shaft 321 and an operating beam 322.

[0029] The folding pivot axis 321 is a hinge that can rotate around its left-right axis, and as shown in Figure 4, it is the center of rotation when the handle body 31 is raised or lowered relative to the cargo bed 1. With this configuration, the handle body 31 can be folded with a simple mechanism, and the cargo bed Y can be easily stored when not in use.

[0030] The operating beam 322 is a columnar (beam-shaped) member that bridges a pair of folding base sections 32 surrounding the base of the handle body 31, preventing the handle body 31 from rotating and allowing it to be held in the usable state. The operating beam 322 is also provided so as to be able to move vertically, and when the operating beam 322 moves downward, it disengages from the position that prevents the handle body 31 from rotating, allowing the handle body 31 to rotate into the folded state.

[0031] The frame section 4 is a frame that extends forward and / or to the left and right of the loading platform 1, and serves to prevent items placed on the loading platform 1 from falling off, or as an auxiliary device when towing and moving the loading platform Y. The frame section 4 has a locking section 41, a bending section 42 that bends from the locking section 41, and a small cross-sectional member 43 that can be connected to the loading platform 1. Furthermore, it is preferable to have multiple frame sections 4 provided on a single loading platform 1. With such a configuration, the range in which items can be placed extending beyond the loading plate 11, and the operability when pulling the frame section 4 to assist in steering the loading platform Y can be easily changed. In addition, the position and number of frame sections 4 can be appropriately changed depending on the items placed on the loading platform Y.

[0032] The locking portion 41 is a member that extends vertically from the frame portion 4, particularly above the top surface of the loading platform 1, and holds the goods being transported by the loading platform Y, preventing them from falling. In the drawing, the locking portion 41 is configured with different widths (length in the direction parallel to the nearest side of the loading plate 11) for the portion provided at the front of the loading platform 1 and the portion provided on the left and right sides of the loading platform 1, but they may all be configured the same. In the former case, the position of the frame portion 4 will not be incorrect when assembling the loading platform Y, and in the latter case, the frame portion 4 can all be configured the same, allowing the loading platform Y to be manufactured at a low cost. In this embodiment, the width of the locking portion 41 is set to be approximately the same length as the nearest side of the loading plate 11, so that large items or large quantities of items can be locked in place.

[0033] The small cross-sectional members 43 are columnar or tubular members that can connect the frame section 4 to the cargo bed 1, and are provided at a predetermined angle to the locking section 41 via a bent section 42. Two small cross-sectional members 43 are provided parallel to each other for one locking section 41, and the distance between them is approximately equal to the distance between the pair of large cross-sectional pipes 13. This allows one frame section 4 to be connected to the cargo bed 1 by inserting the two small cross-sectional members 43 into the two large cross-sectional pipes 13.

[0034] The small section member 43 is mounted in an axial direction substantially parallel to the large section pipe 13, preferably inserted substantially concentrically and mounted so as to be slidable relative to it. That is, the frame section 4 is mounted so as to be slidable toward or away from the loading platform 1. The sliding range at this time is as shown in Figures 3 and 4. In detail, when the locking section 41 is closest to the loading platform 1, the bent section 42 is adjacent to and interfering with the large section pipe 13, and when the locking section 41 is furthest away from the loading platform 1, the small section member 43 is just before it falls off the large section pipe 13. Thus, Figure 5 shows the state in which all the frame sections 4 are extended to their maximum extent in each direction.

[0035] Within this sliding range, it is preferable that the frame portion 4 can be fixed and / or released at any position, and fasteners X capable of fixing the large cross-section pipe 13 and the small cross-section member 43 are provided on the loading platform Y.

[0036] The fastener X is a member that can contact a small cross-section member 43 that can be inserted into the large cross-section pipe 13 at the end of the large cross-section pipe 13, and securely and / or slidably attaches the large cross-section pipe 13 and the small cross-section member 43 to each other. In this embodiment, as shown in Figure 6(a), the fastener X comprises a fixing part 5 that can be fixed to the large cross-section pipe 13, a movable part 6 that can fix and / or release the small cross-section member 43, and a connecting part 7 that integrally connects the fixing part 5 and the movable part 6. Figures 7(a) and 7(b) show the fastener X in a direction parallel to the axial direction of the large cross-section pipe 13 and the small cross-section member 43.

[0037] The fixing part 5 is a substantially cylindrical (especially cylindrical) member that can surround and fix the outer surface of the large cross-section pipe 13, and can be easily attached and detached by tightening and loosening bolts (or screws). Furthermore, the fixing part 5 is connected integrally with the movable part 6 via the connecting part 7, that is, the fixing part 5 and the movable part 6 are adjacent to each other in the direction in which the small cross-section member 43 is inserted into the large cross-section pipe 13. With this configuration, the insertion parts of two members with different diameters can be held and the members can be stably connected to each other. On the other hand, the fixing part 5 may be provided integrally with the large cross-section pipe 13. With this configuration, the gap between members can be reduced and the mounting state of the frame part 4, especially the small cross-section member 43, can be made more stable.

[0038] The movable part 6 has a clamping part 61 that can surround and clamp the outer surface of the small cross-section member 43, and an operating part 62 that can operate the clamping part 61. In this embodiment, as shown in Figures 6(b), 6(c), 7(a), and 7(b), the operating part 62 is rotatably provided with respect to a pivot shaft 622, which will be described later, allowing the small cross-section member 43 to be fixed (clamped) and / or released with simple operation. With this configuration, the fixed and released (slidable) states of the small cross-section member 43 can be switched with simple and intuitive operation.

[0039] The fixed part 5 and the fastening part 61 of the movable part 6 are arranged in series on substantially the same axis, following the positional relationship between the large-section pipe 13 and the small-section member 43 that each surrounds. This configuration directly surrounds and holds both the large-section pipe 13 and the small-section member 43, increasing the contact area and stabilizing the connection between the members. Furthermore, since the fastener X covers most of the area near the boundary where the small-section member 43 is inserted into the end of the large-section pipe 13, the risk of injury to the user's fingers being caught in the boundary between the two when sliding the small-section member 43 against the large-section pipe 13 can be reduced.

[0040] The details of the movable part 6 are described below. The clamping part 61 is provided with a surrounding part 611 and an opening / closing part 612 that extends outward from the surrounding part 611. The surrounding part 611 is a trough-shaped member with a roughly C-shaped cross section that surrounds the outer surface of the small cross section member 43, leaving only a portion open. At both ends of the C-shape, a pair of plate-shaped opening / closing parts 612 are provided, facing each other in the planar direction and extending radially outward. The clamping part 61 is also provided with a fixing pin P that penetrates the plate-shaped opening / closing parts 612 in the thickness direction. The fixing pin P is fixed to the member of the pair of opening / closing parts 612 opposite to the operating part 62, allowing the opening and closing operation to be guided within a predetermined range.

[0041] As shown in Figure 7(a), when the distance between the pair of opening / closing parts 612 narrows, the inner circumference of the surrounding part 611 shortens, and the small cross-sectional member 43 that penetrates the interior is tightened. As shown in Figure 7(b), when the distance between the pair of opening / closing parts 612 widens, the inner circumference of the surrounding part 611 lengthens, and the small cross-sectional member 43 is released.

[0042] The operating section 62 includes a plate-shaped operating section body 621, a pivot shaft 622, and a contact portion 623 that can contact one of the opening / closing sections 612. The operating section body 621 extends away from the pivot shaft 622 and is a member having the characteristics of a so-called lever, while the contact portion 623 is a member that bulges out in a different direction from the operating section body 621 around the pivot shaft 622.

[0043] The pivot shaft 622 is a cylindrical member, more specifically a hinge, provided on the outer surface of one opening / closing section 612, approximately parallel to the axial direction, and rotatably connects to the operating section body 621. The pivot shaft 622 is fixed by passing through a fixing pin P. This keeps the linear distance between the pivot shaft 622 and the opening / closing section 612 furthest from it constant. Furthermore, as shown in Figures 7(a) and 7(b), the thickness of the contact section 623 varies depending on the location in the direction away from the pivot shaft 622. In other words, in the direction shown in Figures 7(a) and 7(b) (axial direction), the distance from the pivot shaft 622 to the contact position where the contact section 623 contacts the clamping section 61 (especially the opening / closing section 612) varies depending on the angle (attitude angle) of the operating section 62.

[0044] More specifically, the thickness of the contact portion 623 that abuts the opening / closing portion 612 when the operating portion body 621 is aligned with the tightening portion 61 is thick enough to close the pair of opening / closing portions 612, while the thickness of the contact portion 623 that abuts the opening / closing portion 612 when the operating portion body 621 is away from the tightening portion 61 and open is thin enough to fully open the pair of opening / closing portions 612. With this configuration, the opening / closing portions 612, and consequently the tightening portion 61, can be operated simply by rotating the operating portion body 621 around the pivot axis 622. In other words, the user can easily switch between fixing (tightening) and releasing (sliding) the small cross-section member 43 with a single, simple operation on a single fastener X.

[0045] In summary, the movable part 6 can be switched by the operating part 62 between a tightened state in which the outer surface of the small cross-section member 43 is tightened, and a relaxed state in which the small cross-section member 43 is released to a state in which it can move.

[0046] First, in the tightened state, as shown in Figure 7(a), the cross-sectional area perpendicular to the axial direction is small inside the tightening portion 61, particularly on the inner circumferential surface of the surrounding portion 611, and this cross-section matches the shape of the cross-section of the small cross-section member 43 (the cross-sectional shape of the outer surface). At this time, the distance from the pivot axis 622 to the contact position where it contacts the opening / closing portion 612 is long.

[0047] On the other hand, in the relaxed state, as shown in Figure 7(b), similarly, the cross-sectional area perpendicular to the axial direction inside the clamping portion 61, particularly on the inner circumferential surface of the surrounding portion 611, is larger than in the tightened state. In this state, the distance from the pivot axis 622 to the contact position where the contact portion 623 contacts the opening / closing portion 612 is shorter than in the tightened state. With this configuration, it is possible to switch between a fixed state and a sliding state for two members of different thicknesses with a simple configuration and few work steps.

[0048] The connecting portion 7 is the part that integrally and continuously connects the fixed portion 5 and the movable portion 6. In this embodiment, it is preferable that the connecting portion 7 is provided in such a manner that it extends axially a part (up to a semicircular arc) of the surrounding portion 611 opposite to the opening / closing portion 612, and is continuous with the fixed portion 5. This configuration ensures a stable connection between the fixed portion 5 and the movable portion 6, while also providing sufficient room for the clamping portion 61 to deform.

[0049] The fastener X, having the above configuration, is expected to improve work efficiency as the number of frame sections 4 attached to the cargo bed Y increases. When the frame section 4 is attached to the cargo bed 1 by the fastener X, the operation for each location only requires rotating the operating unit body 621 by a predetermined angle (in this embodiment, 80 degrees to 190 degrees is preferable), which is a so-called lever operation. This requires less force and takes less time compared to the conventional method of switching between fixing and / or releasing by tightening screws. Therefore, the more locations where conventional screws are replaced with fastener X, the simpler and more efficient the work related to fixing and / or releasing the frame section 4 becomes.

[0050] In the fastener X having the above configuration, the operating part body 621 is preferably curved in part to conform to the shape of the tightening part 61, particularly the outer surface of the surrounding part 611, and it is even more preferable that its tip is bent in a direction away from the surrounding part 611. With such a configuration, the user can easily see the state of the operating part 62 and it is easier to operate the operating part body 621 by placing a finger on its tip.

[0051] In a cargo truck Y equipped with a fastener X having the above configuration, it is preferable to provide a aligning pipe section A at the location where the fixing part 5 is fixed. In the cargo truck Y according to this embodiment, it is preferable that the large cross-section pipes 13, which are provided in pairs in the front-rear direction along the left and right sides of the mounting plate 11, have a rectangular cross-section with their uppermost parts substantially flush with the top surface of the mounting plate 11. When attaching the fastener X thereto, as shown in Figures 7(c) and 7(d), a aligning pipe section A with a substantially circular cross-section (not just a mathematically perfect circle, but allowing for slight distortion) protrudes from the end of the large cross-section pipe 13 with a rectangular cross-section, and the fixing part 5 is fixed to the aligning pipe section A, and then the small cross-section member 43 is attached to the movable part 6. With this configuration, both the fixed part 5 and the movable part 6 can be designed and manufactured based on a circular cross-section. In the case of the cargo truck Y, even if the cross-sectional shapes of the large cross-section pipes 13 in the front-rear direction and the large cross-section pipes 13 in the left-right direction are different, the specifications of the fasteners X can be standardized by the matching pipe section A. In addition, the shape of the connecting part 7 can be simplified, and the fasteners X can be applied to many tubular or columnar members.

[0052] The fastener X having the above configuration can be applied not only to the cargo trolley Y, but also to other articles that include two tubular or columnar members of different diameters, corresponding to the large cross-section pipe 13 (including the matching pipe section A if necessary) and the small cross-section member 43.

[0053] The present invention may have the following configurations. However, the following configurations are merely examples, and their presence or absence can be arbitrarily determined unless otherwise specified.

[0054] ≪Example of changes≫ In the cargo platform Y, it is preferable that the rear ends of the pair of rear rolling elements 22 and the rear ends of the pair of folding base sections 32 are all on the same plane and at the rearmost end of the cargo platform Y. With this configuration, when the cargo platform Y is not in use and is stood upright with the rear ends of the folding base sections 32 in contact with the ground, the entire cargo platform Y can be supported by the folding base sections 32 and the pair of rolling elements 22, allowing for more stable storage of the cargo platform Y.

[0055] The portion of the raised section 12 that connects the mounting plate 11 and the axle 21 in the vertical direction may be configured to slope backward as it goes downward. With this configuration, as mentioned above, the rear rolling elements 22 can be arranged on the same plane as the folding base section 32, and the rolling elements 22 can be positioned closer to the user operating the handle body 31, thereby improving the operability of the cargo truck Y.

[0056] The following describes in detail the method of carrying out the present invention with reference to the drawings. Furthermore, the method of carrying out the invention described below is merely an example, and is not limited to this method; the order of the steps may also be changed.

[0057] ≪Implementation Method≫ When the user attaches the fastener X to the cargo truck Y, they first fix the fixing part 5 to the large diameter pipe 13. At this time, they loosen the bolt (screw) provided on the fixing part 5 as needed, and then insert the end of the large diameter pipe 13 through the cylindrical part of the fixing part 5. Finally, the user tightens the bolt (screw) to fix the fixing part 5 to the large diameter pipe 13. In this case, as shown in Figure 6(a), etc., it is preferable that the large cross-section pipe 13 has a circular cross-section. However, if the large cross-section pipe 13 has a configuration that includes a plane, that is, a straight line in the cross-section, or if the cross-sectional shape is a polygon such as a rectangle, as in the case of the cargo truck Y, a circular cross-section matching pipe section A is provided at the open end of the large cross-section pipe 13, as shown in Figures 7(c) and 7(d), and the fixing part 5 is fixed to the matching pipe section A in the manner described above.

[0058] Next, when attaching the frame section 4 to the cargo bed 1, the user inserts the small cross-section member 43 inside the movable part 6 of the fastener X, especially the surrounding part 611, and then inserts it further into the large cross-section pipe 13 behind it. This operation is performed simultaneously for the two small cross-section members 43 and the two large cross-section pipes 13, and the frame section 4 is attached to the cargo bed 1. The user performs this operation to attach the frame section 4 as many times as required for the cargo truck Y.

[0059] When the user pulls out and fixes the frame section 4 attached to the loading platform 1 to any position, as shown in Figure 7(b), the operating section body 621 is open and separated from the surrounding section 611 at the fastener X, the frame section 4 is slid relative to the loading platform 1, and at the desired position, as shown in Figure 7(a), the operating section body 621 is closed to a position along the surrounding section 611, and the small section member 43 is tightened at the surrounding section 611 to fix it to the large section pipe 13.

[0060] Even when the fastener X is applied not only to a cargo trolley Y but also to other articles including a large cross-section pipe 13 (including the matching pipe section A if necessary) and a small cross-section member 43 (or equivalent tubular or columnar members of different diameters), the small cross-section member 43 is handled in a similar manner, fixed (tightened) and / or released (slidable) from the large cross-section pipe 13. [Explanation of symbols]

[0061] X stop Y-shaped cargo truck 1. Cargo bed 11 Mounting plate 12 Bulk part 13 Large section pipe 131 Anteroposterior large section tube 132 Left and right large cross section pipes 14 Locking piece 2 wheels 21 axles 22 Rolling elements 3. Handle section 31 Handle body 32 Folding base 321 Folding pivot shaft 322 Operation beam 4 Frame section 41 Locking part 42. Bending section 43 Small cross-section parts 5 Fixed part 6 Moving parts 61. Fastening part 611 Encirclement 612 Opening / Closing Section 62 Operation section 621 Control Unit 622 Rotary shaft 623 Contact part 7 Connection part A Matching pipe section P Fixing pin

Claims

1. A fastener capable of fixing a large cross-section pipe and a small cross-section member that can be attached to the large cross-section pipe in an axial direction substantially parallel to the pipe, It comprises a fixing part that can be fixed to the large cross-section pipe, and a movable part that can fix and release the small cross-section member, The fastener comprises a movable part having a fastening part that can surround and fasten the side surface of the small cross-section member, and an operating part that can operate the fastening part.

2. The fixed portion and the movable portion are provided adjacent to each other in the axial direction. The fastener according to claim 1.

3. The operating section is rotatably mounted on a single pivot axis and integrally comprises an operating section body extending away from the pivot axis and a contact section that contacts the tightening section. The distance from the pivot shaft to the contact position where it contacts the clamping portion varies depending on the location. The fastener according to claim 1.

4. The pivot axis is substantially parallel to the axial direction, The operating unit can switch between a tightening state in which the cross-section perpendicular to the axial direction inside the tightening part is aligned with the cross-section of the small cross-section member, and a loosening state in which the cross-sectional area perpendicular to the axial direction inside the tightening part is larger than that in the tightening state. The contact portion is such that the distance from the pivot axis to the contact position in the relaxed state is shorter than the distance from the pivot axis to the contact position in the tightened state. The fastener according to claim 3.

5. A cargo truck including the fastener described in claim 1, It comprises a loading platform having a loading plate for placing cargo, wheels for making the loading platform movable, a handle portion provided along one side of the loading platform, and a frame portion extending from the other side of the loading platform, The large cross-section pipe is provided on the cargo bed, The small cross-sectional member is included in the frame portion and is further attached to the cargo platform so as to be slidable in the direction of approaching or moving away from the cargo platform.

6. Multiple frame sections are provided for one cargo bed. The cargo truck according to claim 5.

7. The large cross-section pipes include those provided along the top surface of the cargo bed. The cargo truck according to claim 5.

8. The large cross-section pipe provided along the top surface of the cargo bed has a substantially rectangular cross-section including a planar portion substantially parallel to the top surface. The cargo truck according to claim 7.

9. The large cross-section pipe having a rectangular cross-section has a substantially circular cross-section connecting pipe section at its open end. The cargo truck according to claim 8.

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