Transport cart

Abstract

To provide a conveyance dolly in which casters can be easily attached / detached with respect to a load carrying platform.SOLUTION: A conveyance dolly includes: a load carrying platform 1 including an attachment portion 11 for attaching a base 41 of a caster 4; a lock member 2 mounted to the attachment portion 11 to fix the base 41 to the attachment portion 11; and a deformation prevention device 3 mounted on the base 41. The attachment portion 11 includes: a bore 5 into which the base 41 is inserted; a restriction portion 6 configured to restrict a downward movement of the base 41 inserted into the bore 5; and a housing 7 located adjacent to the bore 5 and including an engagement portion 72 with which the lock member 2 is engaged. The lock member 2 includes an elastic section 22 disposed to be engaged with the engagement portion 72 when the lock member 2 is housed in the housing 7. The deformation prevention device 3 is configured to prevent deformation of the elastic section 22 when being mounted on the load carrying platform 1.SELECTED DRAWING: Figure 8

Description

[Technical Field]

[0001] The present disclosure relates to a transport cart. [Background technology]

[0002] A transport cart used for carrying and transporting cargo such as containers has been known. The transport cart includes a loading platform and casters fixed to the underside of the loading platform. The casters are generally fixed to the loading platform using bolts and nuts (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 11-105713 Summary of the Invention [Problem to be solved by the invention]

[0004] The conventional transport carts described above require many bolts and nuts to secure the casters to the loading platform, and the work of securing the casters to the loading platform and removing the casters from the loading platform is time-consuming.

[0005] The problem to be solved by the present disclosure is to provide a transport cart in which casters can be easily attached and detached to and from the loading platform. [Means for solving the problem]

[0006] A transport cart according to one aspect of the present disclosure comprises a loading platform having mounting portions for mounting a base of a caster, a locking member attached to the mounting portion to secure the base to the mounting portion, and a deformation prevention device attached to the loading platform. The mounting portion comprises a cavity into which the base is inserted, a restricting portion that restricts downward movement of the base inserted into the cavity, and a storage portion located adjacent to the cavity and having a locking portion for locking the locking member. The locking member has an elastic piece that is arranged to engage with the locking portion when the locking member is stored in the storage portion. The deformation prevention device is configured to prevent deformation of the elastic piece when attached to the loading platform.

[0007] A transport cart according to another aspect of the present disclosure includes a platform having mounting portions for mounting a base of a caster, and a locking member attached to the mounting portion to secure the base to the mounting portion. The mounting portion includes a cavity into which the base is inserted, a restricting portion that restricts downward movement of the base inserted into the cavity, and a storage portion located adjacent to the cavity and having a locking portion for locking the locking member. The locking member has two opposing elastic pieces that are provided to engage with the locking portion when the locking member is stored in the storage portion. [Effects of the Invention]

[0008] The present disclosure provides the advantage that casters can be easily attached and detached to and from the loading platform. [Brief explanation of the drawings]

[0009] [Figure 1] FIG. 1 is a perspective view showing the entire transport cart according to one embodiment of the present disclosure. [Figure 2] FIG. 2 is a top view showing the main parts of the transport cart excluding the handle. [Figure 3] FIG. 3 is a bottom view showing the main part of the same. [Figure 4] FIG. 4 is a cross section taken along line AA in FIG. [Figure 5]FIG. 5 is a cross section taken along line BB in FIG. [Figure 6] FIG. 6 is a perspective view of the main part of the same as that shown obliquely from below. [Figure 7] FIG. 7 is a perspective view showing a step of attaching casters to the transport cart. [Figure 8] FIG. 8 is a perspective view showing another step of attaching the casters to the transport cart. [Figure 9] FIG. 9 is a perspective view showing a locking member and a deformation prevention device provided on the transporting cart. [Figure 10] FIG. 10 is a perspective view showing a process of attaching another caster to the transport cart. DETAILED DESCRIPTION OF THE INVENTION

[0010] 1. Embodiment 1-1. Overall structure of the transport cart Fig. 1 shows the entire structure of a transport cart according to one embodiment. The transport cart according to one embodiment includes a flat platform 1, a plurality of casters 4 fixed to the platform 1, and a handle 9 fixed to the platform 1.

[0011] The front-rear, up-down, and left-right directions used in the following description and in each drawing are based on the use state of the transport cart shown in FIG.

[0012] Specifically, the side of the loading platform 1 where the handle 9 is fixed is the rear side. The side of the loading platform 1 opposite to the side where the handle 9 is fixed is the front side. Furthermore, the side of the loading platform 1 where the casters 4 are fixed is the bottom side. The side of the loading platform 1 where luggage is placed is the top side. The direction perpendicular to the front-to-back direction and the up-down direction is the left-to-right direction.

[0013] The multiple casters 4 include two casters 4 on the front side and two casters 4 on the rear side (see Figures 3, 6, etc.). Each caster 4 has a flat base 41, a support part 43 that protrudes downward from the base 41, and a wheel 45 that is rotatably supported by the support part 43. The base 41 and the support part 43 are made of metal, and the wheel 45 is rotatable around a horizontal axis relative to the support part 43.

[0014] The handle 9 is connected to the rear end of the cargo bed 1 via two handle attachment parts 98 (see Figures 2, 3, etc.). The two handle attachment parts 98 are arranged at the rear end of the cargo bed 1 at a distance from each other on the left and right. As shown in Figure 1, the handle 9 includes an inverted U-shaped metal pipe 91 and a flat connecting plate 95. The metal pipe 91 includes a pair of left and right vertical pipes 911, 912 and a horizontal pipe 913 connecting the upper ends of these pipes. The connecting plate 95 is connected to the metal pipe 91 so as to connect the middle portions of the pair of left and right vertical pipes 911, 912.

[0015] The left and right widths of the inverted U-shaped metal pipe 91 are different between the upper and lower parts of the metal pipe 91. The left and right width of the lower part of the metal pipe 91 is set to be narrower than the left and right width of the upper part of the metal pipe 91. In other words, the distance between the lower parts of the pair of left and right vertical pipes 911, 912 is set to be shorter than the distance between the upper parts of the pair of left and right vertical pipes 911, 912.

[0016] The upper part of the inverted U-shaped metal pipe 91 is inclined so that the upper part is positioned further rearward. In other words, the upper parts of the pair of left and right vertical pipes 911, 912 are inclined so that the upper parts are positioned further rearward. The inclination of the upper parts of both vertical pipes 911, 912 is the same.

[0017] The lower ends of both vertical pipes 911 and 912 are connected to the rear end of the base 41 via corresponding handle attachment portions 98, respectively.

[0018] Furthermore, the transport cart of one embodiment includes a plurality of locking members 2 (see FIG. 3, etc.) attached to the loading platform 1, and a plurality of anti-slip members 8 (see FIG. 2, etc.) also attached to the loading platform 1. The plurality of locking members 2 are four locking members 2 detachably attached to the underside of the loading platform 1. The plurality of anti-slip members 8 are six anti-slip members 8 detachably attached to the upper surface of the loading platform 1. Four of the six anti-slip members 8 constitute four deformation prevention devices 3. The remaining two anti-slip members 8 do not constitute deformation prevention devices.

[0019] There is a one-to-one correspondence between the four casters 4 and the four locking members 2. Similarly, there is a one-to-one correspondence between the four casters 4 and the four deformation prevention devices 3.

[0020] The cargo bed 1, the locking member 2, and the deformation prevention device 3 (the anti-slip member 8) will be described in more detail below.

[0021] 1-2.Cargo bed The loading platform 1 is molded from synthetic resin into a flat plate shape as a whole. As shown in Figures 1, 6, etc., the loading platform 1 has outer surfaces 13 on both the left and right sides, and a recess 15 recessed inward in the left-right direction is formed in the middle portion of each outer surface 13 in the front-to-rear direction. A plurality of vertical ribs 151 are arranged in parallel in the recess 15 so as to divide the internal space of the recess 15 into front and rear. The loading platform 1 can be molded by using upper and lower molds and a slide mold that can slide horizontally, and molding the recess 15 with the slide mold.

[0022] In the loading platform 1, through holes 17 are formed vertically at portions spaced a predetermined distance inward in the left-right direction from each recess 15. The through holes 17 and the recesses 15 correspond one-to-one, and each has a rectangular shape that is long in the front-to-rear direction.

[0023] As a result, a gripping portion 19 with a U-shaped cross section is formed on the outer side of the through-hole 17 in the left-right direction of the cargo bed 1. The gripping portion 19 has protruding pieces 192 that protrude outward in the left-right direction on both the top and bottom sides of the recess 15. The presence of the protruding pieces 192 on both the top and bottom sides of the gripping portion 19 has the advantage that it is easy for the user to grip the cargo bed 1.

[0024] The cargo bed 1 has four mounting portions 11 for attaching the casters 4 (see Figures 3, 6, etc.). The four mounting portions 11 include two front mounting portions 11 provided for attaching the two front casters 4, and two rear mounting portions 11 provided for attaching the two rear casters 4. The left-right distance between the two front mounting portions 11 is shorter than the left-right distance between the two rear mounting portions 11.

[0025] On the underside of the cargo bed 1, a linear reinforcing rib 121 extending in the front-to-rear direction is provided seamlessly between the left-side mounting portion 11 of the two front mounting portions 11 (hereinafter referred to as the "left front mounting portion 11") and the left-side mounting portion 11 of the two rear mounting portions 11 (hereinafter referred to as the "left rear mounting portion 11"). Of the multiple ribs provided on the underside of the cargo bed 1, the reinforcing rib 121 is one of the ribs that protrudes downward the most. The reinforcing rib 121 is continuous with both the left front mounting portion 11 and the left rear mounting portion 11.

[0026] Similarly, on the underside of the cargo bed 1, a linear reinforcing rib 122 extending longitudinally is provided seamlessly between the right-side mounting portion 11 of the two front mounting portions 11 (hereinafter referred to as the "right front mounting portion 11") and the right-side mounting portion 11 of the two rear mounting portions 11 (hereinafter referred to as the "right rear mounting portion 11"). Of the multiple ribs provided on the underside of the cargo bed 1, the reinforcing rib 122 is one of the ribs that protrudes downward the most. The reinforcing rib 122 is continuous with both the right front mounting portion 11 and the right rear mounting portion 11.

[0027] By providing the two reinforcing ribs 121 and 122, the strength of the loading platform 1 is increased, and deformation of the loading platform 1 due to the load applied to the caster 4 is effectively suppressed.

[0028] Additionally, a linear reinforcing rib 141 extending longitudinally is provided seamlessly on the underside of the cargo bed 1 between the left front mounting portion 11 and the portion where the left handle mounting portion 98 is attached. The reinforcing rib 141 is one of the ribs that protrudes downward the most out of the multiple ribs provided on the underside of the cargo bed 1. The reinforcing rib 141 is continuous with both the left front mounting portion 11 and the portion where the left handle mounting portion 98 is attached.

[0029] Similarly, a linear reinforcing rib 142 extending longitudinally is provided seamlessly on the underside of the cargo bed 1 between the right front mounting portion 11 and the portion where the right handle mounting portion 98 is attached. Of the multiple ribs provided on the underside of the cargo bed 1, the reinforcing rib 142 is one of the ribs that protrudes downward the most. The reinforcing rib 142 is continuous with both the right front mounting portion 11 and the portion where the right handle mounting portion 98 is attached.

[0030] By providing the two reinforcing ribs 141, 142, the strength of the cargo bed 1 is increased, and deformation of the cargo bed 1 due to the load applied to the handle 9 is effectively suppressed.

[0031] The four reinforcing ribs 121, 122, 141, and 142 are parallel to one another. The four reinforcing ribs 121, 122, 141, and 142 protrude downward by the same amount. Two reinforcing ribs 141 and 142 are located between two reinforcing ribs 121 and 122.

[0032] Next, a description will be given of the structure of the mounting portions 11. The four mounting portions 11 basically have a common structure. In the following, the common structure of the mounting portions 11 will first be described.

[0033] The mounting portion 11 is configured to mount the base 41 of the caster 4. As shown in Fig. 7 and other figures, the mounting portion 11 includes a cavity 5 into which the base 41 is inserted, a restricting portion 6 located below the cavity 5, and a storage portion 7 located adjacent to the cavity 5 in the left-right direction.

[0034] The cavity 5 is open downward and also open to one side in the left-right direction. Hereinafter, the one side in the left-right direction (i.e., the side to which the cavity 5 is open) will be referred to as the "first side," and the opposite side will be referred to as the "second side."

[0035] The empty space 5 is separated from the surrounding area in the horizontal direction by three walls 111, 112, and 113 provided on the underside of the loading platform 1. Each of the three walls 111, 112, and 113 is a rib-shaped wall that protrudes downward.

[0036] The two walls 111, 112 are wall 111 located on the front side of cavity 5 and wall 112 located on the rear side of cavity 5. The remaining wall 113 is wall 113 located on the second side of cavity 5. Another wall 114 is provided on the first side of cavity 5, but the tip of ribbed wall 114 is located higher than the tips of the other three walls 111, 112, 113. Therefore, cavity 5 is open to the first side in the horizontal direction, but not to the other side.

[0037] A plurality of notched holes 118 are provided on the leading edge of the wall portion 114. The plurality of holes 118 are two holes 118 positioned in the front and rear with a distance between them.

[0038] Furthermore, the cavity 5 is provided with a plurality of wall portions 115 that restrict the upward movement of the base 41 inserted into the cavity 5. The tips of these wall portions 115 are at the same height as the tip of the wall portion 114, and are therefore located higher than the tips of the other three wall portions 111, 112, and 113. The base 41 inserted into the cavity 5 comes into contact with the tips of these wall portions 115, thereby restricting its upward movement.

[0039] The restricting portion 6 is a portion for restricting downward movement of the base 41 inserted into the cavity 5, and includes a front restricting wall portion 61 and a rear restricting wall portion 62. The front restricting wall portion 61 is molded integrally with the front wall portion 111, and the rear restricting wall portion 62 is molded integrally with the rear wall portion 112 (see FIG. 5, etc.).

[0040] The front restriction wall 61 protrudes rearward from the tip of the front wall 111. The front wall 111 and the front restriction wall 61 are continuous to form an L-shape as a whole. The rear restriction wall 62 protrudes forward from the tip of the rear wall 112. The rear wall 112 and the rear restriction wall 62 are continuous to form an L-shape as a whole.

[0041] When the base 41 is inserted into the cavity 5, the front restricting wall portion 61 is positioned below the front end of the base 41, and the rear restricting wall portion 62 is positioned below the rear end of the base 41, thereby restricting downward movement of the base 41.

[0042] The accommodation portion 7 is a portion formed in a recessed shape to accommodate the locking member 2, and is located adjacent to the first side of the cavity 5 (i.e., the side where the cavity 5 is open). The accommodation portion 7 is in communication with the cavity 5, and is provided with a locking portion 72 for locking the locking member 2 therein.

[0043] The locking portion 72 includes two locking pieces 721 positioned at a distance in the front-to-rear direction (see FIG. 4, etc.). Each of the two locking pieces 721 has a vertical piece 7213 protruding downward and a horizontal piece 7215 protruding horizontally from the vertical piece 7213. The vertical pieces 7213 of the two locking pieces 721 are positioned parallel to each other at a distance in the front-to-rear direction. The horizontal pieces 7215 of the two locking pieces 721 protrude in directions approaching each other.

[0044] A through hole 73 that penetrates vertically is formed between the two locking pieces 721. The through hole 73 is used to insert the anti-slip member 8. Recesses 74 are formed on both the front and rear sides of the two locking pieces 721 (i.e., on both the front and rear sides of the locking portion 72). Each of the recesses 74 on both sides has a shape that is recessed upward and is open downward.

[0045] The recesses 74 on both sides are provided with a positioning protrusion 75 and a guide protrusion 77 (see Figure 4, etc.). The positioning protrusion 75 is a rectangular rib-like protrusion that is long in the vertical direction and is provided to position the locking member 2 in the left-right direction. The guide protrusion 77 is a triangular rib-like protrusion that is wider towards the bottom in order to guide the locking member 2.

[0046] In each recess 74, the positioning protrusion 75 and the guide protrusion 77 are positioned at a distance in the front-to-rear direction. Each recess 74 has a first corner close to the other recess 74 and a second corner farther from the other recess 74, with the guide protrusion 77 provided at the first corner and the positioning protrusion 75 provided at the second corner.

[0047] The above is the common structure of the mounting portions 11, but the relative positional relationship between the void 5 and the storage portion 7 differs between the two front mounting portions 11 and the two rear mounting portions 11 (see Figures 3, 6, etc.).

[0048] That is, in the two front mounting portions 11 lined up on the left and right, the side on which the mounting portions 11 are located with respect to the cavity 5 is the inside in the left-right direction. Therefore, in the two front mounting portions 11, the locking members 2 are located inside the casters 4 in the left-right direction. The two front mounting portions 11 have the advantage that the casters 4 are located outside the locking members 2, which prevents them from colliding with any object and causing damage, etc.

[0049] In the two rear mounting portions 11 lined up on the left and right, the side on which the mounting portions 11 are located relative to the cavity 5 is the outer side in the left-right direction. Therefore, in the two rear mounting portions 11, the locking members 2 are located on the outer side of the casters 4 in the left-right direction. In the two rear mounting portions 11, the two handle mounting portions 98 are located between the two mounting portions 11.

[0050] As will be described later with reference to Figure 7 etc., the casters 4 are attached and detached from the outside in the left-right direction at the two rear attachment parts 11, but the handle attachment part 98 does not get in the way of these operations because it is located inside in the left-right direction relative to the rear attachment parts 11. In other words, there is an advantage in that the casters 4 can be attached and detached while the handle attachment part 98 remains fixed to the cargo bed 1.

[0051] 1-3. Locking member As shown in Figure 9 and other figures, the locking member 2 has a rectangular parallelepiped locking body 21, two elastic pieces 22 protruding in the same direction from the locking body 21, and two protruding portions 24 protruding in the same direction from the locking body 21. The two elastic pieces 22 are formed in an overall V-shape so that the closer they are to their tips, the greater the distance between them. With the locking body 21 as the reference, the protruding direction of the two elastic pieces 22 and the protruding direction of the two protruding portions 24 are the same. The locking body 21, the two elastic pieces 22, and the two protruding portions 24 are integrally molded using synthetic resin.

[0052] The two elastic pieces 22 are positioned at a distance from each other in the longitudinal direction of the lock body 21. The longitudinal direction of the lock body 21 is the same as the longitudinal direction of the lock member 2. When the lock member 2 is attached to the cargo bed 1, the longitudinal direction of the lock member 2 coincides with the front-to-rear direction.

[0053] Each of the two elastic pieces 22 has a vertical piece 223 protruding from the locking member 2 and a horizontal piece 225 protruding from a part of the vertical piece 223. The vertical pieces 223 of the two elastic pieces 22 are positioned at a distance in the longitudinal direction of the locking member 2 and are formed in a V-shape so that the closer they are to the tip, the greater the distance between them. The horizontal pieces 225 of the two elastic pieces 22 protrude in directions that separate them from each other.

[0054] The two protrusions 24 are positioned at a distance from each other in the longitudinal direction of the locking member 2. More specifically, they are positioned at a distance from each other on both sides of the two elastic pieces 22 in the longitudinal direction of the locking member 2. The protrusion length of the two protrusions 24 from the locking body 21 is set to be longer than the protrusion length of the elastic pieces 22 from the locking body 21 (i.e., the protrusion length of the vertical piece 223 from the locking body 21). The two protrusions 24 function to protect the two elastic pieces 22 located between them. For example, when the locking member 2 is stored individually, the protrusions 24 located on both sides of the two elastic pieces 22 effectively prevent damage to each elastic piece 22. The two protrusions 24 of the locking member 2 also function as guides when the locking member 2 is fitted into the storage section 7.

[0055] In addition, each of the two protrusions 24 is provided with a recess 245. Each protrusion 24 has a first corner close to the other protrusion 24 and a second corner distant from the other protrusion 24, and the recess 245 is provided in the second corner.

[0056] 1-4. Deformation prevention equipment The deformation prevention device 3 is a member molded using synthetic resin such as rubber. The deformation prevention device 3 is configured to be insertable from above into one of a plurality of through holes 73 (see FIG. 4) that corresponds to the through hole 73 of the loading platform 1.

[0057] The deformation prevention device 3 integrally comprises a flat anti-slip part 31 and a deformation prevention part 33 extending from the anti-slip part 31. The anti-slip part 31 has an uneven anti-slip surface 310. The anti-slip surface 310 is provided with a plurality of protrusions for preventing slipping.

[0058] The deformation prevention part 33 is the part that is inserted into the through-hole 73 and is formed in a rectangular tubular shape. The deformation prevention part 33 has two flat outer surfaces 331 that face in opposite directions. When the non-slip surface 310 of the deformation prevention tool 3 is viewed from the front, the outer shape of the non-slip part 31 is larger than the outer shape of the deformation prevention part 33.

[0059] 1-5. How to install casters In one embodiment of a transport cart, a method for attaching a caster 4 to a mounting portion 11 of a loading platform 1 includes a first step of inserting the base 41 of the caster 4 into the cavity 5 of the mounting portion 11, a second step of accommodating a locking member 2 in the accommodating portion 7 of the mounting portion 11, and a third step of inserting a deformation prevention device 3 into the through hole 73 of the mounting portion 11.

[0060] In the first step, the base 41 of the caster 4 is inserted in the left-right direction from the side of the mounting part 11 where the storage part 7 is located into the empty space 5 adjacent to this storage part 7. That is, for the two left and right mounting parts 11 provided on the rear side of the cargo bed 1, the base 41 of the caster 4 is inserted into the empty space 5 from the outside in the left-right direction (see FIG. 7, etc.). The handle mounting part 98 is located on the inside in the left-right direction with respect to each mounting part 11, so the handle mounting part 98 does not get in the way when inserting the caster 4.

[0061] In the two left and right mounting portions 11 provided on the front side of the loading platform 1, the bases 41 of the casters 4 are inserted into the spaces 5 from the inside in the left-right direction (see FIG. 10, etc.).

[0062] The bases 41 inserted into the spaces 5 can move toward the side of the space 5 where the storage sections 7 are located, but cannot move to other sides. That is, at the two left and right mounting sections 11 on the rear side, the bases 41 of the casters 4 can move outward in the left-right direction, but cannot move to other sides. At the two left and right mounting sections 11 on the front side, the bases 41 of the casters 4 can move inward in the left-right direction, but cannot move to other sides.

[0063] The second step is performed after the first step. In the second step, the locking member 2 is inserted into the storage section 7 from the underside of the cargo bed 1, with the side where the elastic piece 22 and the protrusion 24 are located relative to the lock body 21 positioned first (see Figures 8 and 10). With the locking member 2 inserted into the storage section 7, the two protrusions 24 of the locking member 2 are fitted one-to-one into the two recesses 74 of the storage section 7 (see Figure 4).

[0064] When each convex portion 24 of the locking member 2 is fitted into the corresponding recess 74, the convex portion 24 comes into contact with the inclined surface of the triangular rib-shaped protrusion 77, and can be smoothly guided to the correct position. When each convex portion 24 is in the correct position, the corresponding protrusion 75 is inserted into the recess 245 of each convex portion 24. This positions the locking member 2 in the left-right direction, and prevents the locking member 2 from shifting left-right within the accommodation portion 7.

[0065] When the locking member 2 is inserted into the accommodating portion 7, the two elastic pieces 22 of the locking member 2 are elastically locked to the locking portions 72 of the accommodating portion 7. The specific procedure is as follows. That is, the two elastic pieces 22 of the locking member 2 are inserted into the space between the two locking pieces 721 of the accommodating portion 7. At this time, the horizontal pieces 225 of the two elastic pieces 22 of the locking member 2 press against the horizontal pieces 7215 of the two locking pieces 721 in a one-to-one relationship, and the two elastic pieces 22 bend in directions approaching each other, causing the horizontal pieces 225 of the two elastic pieces 22 to climb over the horizontal pieces 7215 of the two locking pieces 721. Then, the horizontal pieces 225 of the two elastic pieces 22 are hooked one-to-one onto the horizontal pieces 7215 of the two locking pieces 721, thereby preventing the locking member 2 from coming out of the accommodating portion 7.

[0066] Furthermore, with the locking member 2 inserted into the accommodation section 7, multiple protrusions (not shown) provided on the locking body 21 of the locking member 2 are inserted one-to-one into multiple holes 118 provided in the wall section 114. The multiple protrusions are two vertical rib-like protrusions positioned at a distance from each other in the front-to-rear direction, and when these come into contact with the base 41 of the caster 4, they restrict misalignment of the base 41 in the left-to-right direction.

[0067] The third step is performed after the second step. In the third step, the deformation prevention device 3 is inserted into the through-hole 73 from the upper side of the cargo bed 1, with the side where the deformation prevention part 33 is located relative to the non-slip part 31 being the leading edge. With the deformation prevention device 3 inserted into the through-hole 73, the deformation prevention part 33 is fitted into the space between the two elastic pieces 22 of the locking member 2 (in other words, the space between the two vertical pieces 223). One of the two outer surfaces 331 of the deformation prevention part 33 is positioned so as to abut against one of the two elastic pieces 22 of the locking member 2 or to face it with a small clearance between them. The other of the two outer surfaces 331 is positioned so as to abut against the other of the two elastic pieces 22 or to face it with a small clearance between them.

[0068] Therefore, when the deformation prevention device 3 is attached to the cargo bed 1, the two elastic pieces 22 bend in directions toward each other, and the presence of the deformation prevention parts 33 prevents the two elastic pieces 22 from being disengaged from the locking parts 72. In other words, when one of the two elastic pieces 22 tries to deform, it hits one outer surface 331 of the deformation prevention parts 33, preventing further deformation. Similarly, when the remaining one of the two elastic pieces 22 tries to deform, it hits the other outer surface 331 of the deformation prevention parts 33, preventing further deformation. This prevents the locking member 2 from falling off the cargo bed 1.

[0069] Furthermore, when the deformation prevention tool 3 is inserted into the through-hole 73, the anti-slip surface 310 of the anti-slip part 31 is located slightly above the upper surface of the cargo bed 1. This allows the deformation prevention tool 3 to fully function as the anti-slip member 8.

[0070] In the loading platform 1 to which the caster 4, locking member 2, and deformation prevention device 3 have been attached through the above-mentioned first, second, and third steps, the base 41 of the caster 4 is prevented from coming out of the cavity 5 of the loading platform 1 by the base 41 coming into contact with the lock body 21 of the locking member 2. The deformation prevention device 3 prevents the locking member 2 from falling out of the storage section 7 of the loading platform 1.

[0071] In this way, in the transport cart of one embodiment, the caster 4 can be easily fixed to the mounting portion 11 of the loading platform 1, and furthermore, the caster 4 is stably fixed to the loading platform 1 after being attached.

[0072] 1-6. How to remove the casters In the transport cart of one embodiment, the caster 4 can also be easily removed from the mounting portion 11 of the loading platform 1. The method for removing the caster 4 from the mounting portion 11 of the loading platform 1 includes a first step of removing the deformation prevention device 3 from the through-hole 73 of the mounting portion 11, a second step of removing the locking member 2 from the accommodating portion 7 of the mounting portion 11, and a third step of removing the base 41 of the caster 4 from the cavity 5 of the loading platform 1.

[0073] In the first step, the deformation prevention device 3 is removed from the upper surface side of the cargo bed 1. As a result, the deformation prevention portion 33 is no longer present in the space between the two elastic pieces 22 of the locking member 2.

[0074] The second step is carried out after the first step. In the second step, the locking state of the two elastic pieces 22 with the locking portions 72 is released, and then the locking member 2 is pulled out from the underside of the cargo bed 1.

[0075] To release the locked state of the two elastic pieces 22, for example, a finger is inserted into the through-hole 17 from the upper surface side of the loading platform 1, and the finger is placed on the tip side of the two elastic pieces 22 to bend the two elastic pieces 22 in a direction toward each other. As a result, the vertical pieces 223 of the two elastic pieces 22 bend in a direction toward each other, and the locking of each elastic piece 22 with the locking piece 721 is released.

[0076] The third step is performed after the second step. In the third step, the bases 41 of the casters 4 inserted in the spaces 5 are slid in the left-right direction toward the mounting portions 11 on which the storage portions 7 are located. That is, at the two left and right mounting portions 11 provided on the rear side of the cargo bed 1, the bases 41 of the casters 4 are slid outward in the left-right direction. Because the handle mounting portions 98 are located inside the mounting portions 11 in the left-right direction, the handle mounting portions 98 do not get in the way of the operation of sliding the casters 4.

[0077] At the two left and right mounting portions 11 provided on the front side of the loading platform 1, the bases 41 of the casters 4 are slid inward in the left-right direction. At this time, since the locking member 2 is not present in the storage portion 7, the sliding of the bases 41 is not restricted by the locking member 2.

[0078] As described above, the direction in which locking member 2 can be moved to release elastic piece 22 (downward when in use) is different from the direction in which base 41 of caster 4 can move (left and right when in use), specifically, they differ by 90°. Therefore, even if base 41 of caster 4 hits locking member 2 and applies an external force, locking member 2 is prevented from being accidentally released by that external force.

[0079] 2. Variations Various modified examples of the transport cart of the embodiment will be described. In the following description, the same components as those of the transport container of the embodiment will be assigned the same reference numerals and detailed description thereof will be omitted.

[0080] In the transport cart of the embodiment described above, the locking member 2 is provided with two elastic pieces 22, but it is sufficient for the locking member 2 to have at least one elastic piece 22. In addition, since the transport cart of the embodiment is provided with two elastic pieces 22, the load acting on each elastic piece 22 can be distributed, and even if one elastic piece 22 comes off the engaging portion 72, the remaining elastic piece 22 can maintain the engagement with the engaging portion 72. This has the advantage of more effectively preventing the locking member 2 from accidentally coming off the loading platform 1.

[0081] Furthermore, in the transport cart of one embodiment described above, the locking portion 72 is composed of two locking pieces 721, but the locking portion 72 need only have a structure that allows the elastic piece 22 to be elastically locked, and is not limited to having a piece-like structure.

[0082] Furthermore, although the transport cart of the above-described embodiment is provided with the deformation prevention device 3, this is not essential. In other words, in practice, the transport cart may not be provided with the deformation prevention device 3 as long as the deformation of the elastic piece 22 can be suppressed to an extent that the locking member 2 does not come off.

[0083] Furthermore, in the transport cart of the embodiment described above, the locking member 2 is provided with the protrusion 24, but this is not essential. In other words, the locking member 2 may not have the protrusion 24 as long as the elastic piece 22 is prevented from being damaged to an extent that does not cause practical problems.

[0084] The above-described modifications are merely examples of modifications of the transport container of one embodiment, and other configurations of the transport container of one embodiment can naturally be modified as appropriate.

[0085] 3. Effects As described above based on one embodiment and various modified examples thereof, the transport cart of the present disclosure includes a loading platform 1, a locking member 2, and a deformation prevention device 3. The loading platform 1 has an attachment portion 11 for attaching the base 41 of the caster 4. The locking member 2 is attached to the attachment portion 11 to secure the base 41 to the attachment portion 11. The deformation prevention device 3 is attached to the loading platform 1. The attachment portion 11 includes a cavity 5, a restricting portion 6, and a storage portion 7. The base 41 is inserted into the cavity 5. The restricting portion 6 restricts downward movement of the base 41 inserted into the cavity 5. The storage portion 7 is located adjacent to the cavity 5 and has a locking portion 72 for locking the locking member 2. The locking member 2 has an elastic piece 22 provided to engage with the locking portion 72 when the locking member 2 is stored in the storage portion 7. The deformation prevention device 3 is configured to prevent deformation of the elastic piece 22 when attached to the loading platform 1.

[0086] Therefore, according to the transport cart of the present disclosure, the caster 4 can be easily fixed to the loading platform 1 by inserting the base 41 into the empty space 5 of the loading platform 1 and attaching the locking member 2 and the deformation prevention device 3 to the loading platform 1, and the removal process is also simple.

[0087] In the transport cart described above, the locking member 2 further has a protrusion 24 for protecting the elastic piece 22. The accommodation section 7 further has a recess 74 into which the protrusion 24 is inserted.

[0088] Therefore, according to the transport cart of the present disclosure, the protrusions 24 of the locking member 2 can prevent the elastic pieces 22 from being damaged or the like.

[0089] In the transport cart, the deformation prevention device 3 is an anti-slip member 8 attached to the top surface of the loading platform 1.

[0090] Therefore, according to the transport cart of the present disclosure, the deformation prevention device 3 can be used to prevent the cargo placed on the loading platform 1 from slipping.

[0091] As described based on one embodiment and various modified examples thereof, the transport cart of the present disclosure includes a loading platform 1 and a locking member 2. The loading platform 1 has an attachment portion 11 for attaching the base 41 of the caster 4. The locking member 2 is attached to the attachment portion 11 to secure the base 41 to the attachment portion 11. The attachment portion 11 includes a cavity 5, a restricting portion 6, and a storage portion 7. The base 41 is inserted into the cavity 5. The restricting portion 6 restricts downward movement of the base 41 inserted into the cavity 5. The storage portion 7 is located adjacent to the cavity 5 and has a locking portion 72 for locking the locking member 2. The locking member 2 has two elastic pieces 22 facing each other. The two elastic pieces 22 are arranged to engage with the locking portion 72 when the locking member 2 is stored in the storage portion 7.

[0092] Therefore, according to the transport cart of the present disclosure, the caster 4 can be easily fixed to the loading platform 1 by inserting the base 41 into the empty space 5 of the loading platform 1 and attaching the locking member 2 to the loading platform 1, and the removal process is also simple.

[0093] The transport cart of the present disclosure has been described above based on one embodiment and various modified examples thereof, but the transport cart of the present disclosure is not limited to the above-described embodiment and modified examples, and it is possible to make appropriate design changes and to combine and apply the configurations of various modified examples as appropriate. [Explanation of symbols]

[0094] 1 Cargo bed 11 Mounting part 2 Locking member 22 Elastic piece 3. Deformation prevention equipment 4 Casters 41 Pedestal 5. Vacant Space 6. Regulatory Department 7 Storage section 72 Locking part 74 recess 8 Anti-slip material

Claims

1. a loading platform having mounting portions for mounting caster bases; a locking member attached to the mounting portion to fix the base to the mounting portion; a deformation prevention device attached to the loading platform; The mounting portion is a cavity into which the base is inserted; a restricting portion that restricts downward movement of the base inserted into the cavity; a receiving portion located adjacent to the cavity and having a locking portion for locking the locking member; the locking member has an elastic piece provided to engage with the engaging portion when the locking member is housed in the housing portion, The deformation prevention tool is configured to prevent deformation of the elastic piece by contacting the elastic piece when attached to the loading platform, and to prevent the locking member from falling off. Transport cart.

2. the locking member further has a protrusion for protecting the elastic piece, The accommodating portion further has a recess into which the protrusion is inserted. The transport cart of claim 1.

3. The deformation prevention tool is an anti-slip member attached to the upper surface of the loading platform.

3. The transport cart according to claim 1 or 2.

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