Accessory components for transport trolleys and transport trolleys

Abstract

To make it easy to carry a large cargo.SOLUTION: The present invention provides an accessory member 100 for carriage carts capable of being attached to or detached from a carriage cart 10 having a cart main unit 20 and casters 31A and 31B attached to the cart main unit 20. The accessory member includes a loading part 110 capable of loading a cargo, which is larger than a cargo to be placed on the cart main unit 20, with the accessory member 100 mounted on the carriage cart 10.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to an accessory member for a transport cart and a transport cart.

Background Art

[0002] Transport carts are used at work sites and the like to transport goods.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] When loading a transported item onto a transport cart, if the transported item is large, there is a problem that it cannot be loaded onto the transport cart or may protrude, making it difficult to transport easily. The present invention has been made in view of the above problems, and an object thereof is to enable easy transportation of large transported items.

Means for Solving the Problems

[0005] The present invention is an accessory member for a transport cart that is detachable from a transport cart including a cart main body and casters attached to the cart main body, and a loading portion capable of loading a transported item larger than that loaded on the cart main body in a state where the accessory member is attached to the transport cart. The attachment part of the attachment part has a mounting portion on the attachment part side to which a push member is attached for the user to push the transport trolley by hand when it is in motion, and the mounting portion on the attachment part side is positioned so that it does not overlap with the main body of the trolley in a plan view when the attachment part is attached to the transport trolley. It is characterized by the above.

Effects of the Invention

[0006] According to the present invention, large transported items can be easily transported.

Brief Description of the Drawings

[0007] [Figure 1] This is a perspective view showing the transport trolley of the first embodiment before the attachment of the accessory components. [Figure 2] This is a perspective view showing the transport cart after the attached components have been installed. [Figure 3] This is a plan view showing the transport cart with its attached components. [Figure 4] This is a front view showing the transport cart with the attached components. [Figure 5] This is a side view showing the transport trolley with the attached components. [Figure 6] This is a perspective view showing the surrounding configuration of the accessory member of the first embodiment. [Figure 7] This diagram shows the configuration of the corner section, the push member, and the attached members. [Figure 8] This is a diagram showing the configuration of the attached components. [Figure 9] This is a perspective view showing the surrounding configuration of the accessory member of the second embodiment. [Figure 10] This is a perspective view showing the transport trolley of the third embodiment before the attachment of the accessory components. [Figure 11] This is a perspective view showing the transport trolley of the fourth embodiment with the attached components. [Figure 12] This is a front view showing the transport cart with the attached components. [Modes for carrying out the invention]

[0008] The transport trolley and its accessories according to this embodiment will be described with reference to the drawings. <First Embodiment> Figure 1 is a perspective view showing the transport cart 10 before the attachment of the accessory member 100. Figure 2 is a perspective view showing the transport cart 10 after the attachment of the accessory member 100. Figure 3 is a plan view showing the transport cart 10 with the attachment of the accessory member 100. Figure 4 is a front view showing the transport cart 10 with the attachment of the accessory member 100. Figure 5 is a side view showing the transport cart 10 with the attachment of the accessory member 100. Note that Figures 4 and 5 show the attachment of the push member 40 to the accessory member 100. For convenience, in each figure, arrow Fr is shown as the front, arrow Rr as the rear, arrow R as the right, and arrow L as the left, and the center of the transport cart 10 in the left-right direction is shown as the centerline C. However, the transport cart 10 can travel on the running surface in any direction: forward, backward, left, or right.

[0009] First, we will describe the transport trolley 10 to which the attached components 100 can be mounted. The transport trolley 10 comprises a trolley body 20 and a running section 30. The trolley body 20 is constructed by connecting multiple frame sections and other components, and is used to load transported goods. In a plan view, the trolley body 20 has a roughly rectangular shape with the front-to-back direction (first direction) as the longitudinal direction and the left-to-right direction (second direction), which is perpendicular to the front-to-back direction, as the short direction. That is, if the length of the trolley body 20 in the front-to-back direction is L1 (see Figure 5) and the length of the trolley body 20 in the left-to-right direction is L2 (see Figure 4), then length L1 > length L2. The trolley body 20 has a front frame section 21a, a rear frame section 21b, a right frame section 21c, a left frame section 21d, a corner section 22, reinforcing frame sections (reinforcing parts) 25a to 25d, a mounting section 27, and guide sections 28a and 28b.

[0010] The front frame section 21a, the rear frame section 21b, the right frame section 21c, and the left frame section 21d constitute the outer shape of the bogie body section 20. Furthermore, the front frame section 21a, the rear frame section 21b, the right frame section 21c, and the left frame section 21d are joined at the four corners by the corner sections 22 to form a roughly rectangular frame frame on all four sides. For example, the front frame section 21a, the rear frame section 21b, the right frame section 21c, and the left frame section 21d can be made of a square hollow pipe made of aluminum alloy.

[0011] The corner section 22 connects adjacent frame sections from the front frame section 21a, rear frame section 21b, right frame section 21c, and left frame section 21d at its four corners. Furthermore, in the specification where the accessory member 100 is not attached to the transport trolley 10 (referred to as the normal specification), the corner section 22 functions as a mounting part for the push member 40, which will be described later, and in the specification where the accessory member 100 is attached to the transport trolley 10 (referred to as the specification of this embodiment), it functions as a mounting part for the accessory member 100. The corner section 22 corresponds to an example of a mounting part on the transport trolley side.

[0012] Figure 6 is a perspective view showing the configuration around the accessory member 100. Figure 7(a) is a plan view showing the configuration of the corner section 22. The corner part 22 has a cylindrical part 34, connecting parts 35a and 35b, and a support part 36. The cylindrical part 34 has an insertion hole 23 formed inside along the vertical direction. In the normal specification, the hand-pushing member 40 is attached to the cart main body part 20 by inserting the hand-pushing member 40 into the insertion hole 23. On the other hand, in the specification of this embodiment, the accessory member 100 is attached to the cart main body part 20 by inserting a detachable part 120 of the accessory member 100, which will be described later, into the insertion hole 23. The connecting parts 35a and 35b connect the front frame part 21a, the rear frame part 21b, the right frame part 21c, and the left frame part 21d using bolts, rivets, welding, etc. The connecting parts 35a and 35b connect the frame parts while sandwiching each frame part between a pair of side walls. The support part 36 is arranged so as to horizontally cross the lower opening of the insertion hole 23. In the normal specification, the support part 36 supports the lower end of the hand-pushing member 40 inserted into the insertion hole 23. In the specification of this embodiment, the support part 36 supports the detachable part 120 of the accessory member 100 inserted into the insertion hole 23. However, in the specification of this embodiment, a gap is formed between the support part 36 and the lower end of the detachable part 120 of the accessory member 100 inserted into the insertion hole 23, and it can be configured not to support the detachable part 120 by not being in contact. By the support part 36 not supporting the detachable part 120, the manufacturing cost of the corner part 22 can be reduced by not overly strengthening the strength of the corner part 22. The corner part 22 can use, for example, a member made of an aluminum alloy formed by extrusion molding.

[0013] The reinforcing frame parts 25a, 25b, 25c, and 25d are joined in the front, rear, left, and right directions within the square frame and are joined by bolts, rivets, welding, etc. to reinforce the cart main body part 20. In this embodiment, by joining 12 short reinforcing frame parts 25c in the left-right direction to 2 long reinforcing frame parts 25a and 25b that are long in the front-rear direction, a plurality of substantially rectangular spaces 26 divided into 3 rows in the front-rear direction and 5 columns in the left-right direction are formed in a plan view. Also, in the front and rear spaces 26 sandwiching the central space 26 among the two rows of spaces 26 on both the left and right sides, the reinforcing frame part 25d is joined to the front and rear reinforcing frame parts 25c so as to horizontally cross the space 26 in the front and rear directions. The reinforcing frame parts 25a, 25b, 25c, and 25d are, for example, made of an aluminum alloy Angular hollow pipes, plates with uneven cross-sections, etc. can be used.

[0014] Further, the carriage main body 20 has a mounting portion 27 attached to the upper part of the space 26 that is not blocked by the mounting members 32A and 32B to be described later among the plurality of spaces 26. The mounting portion 27 is a flat metal plate for mounting a transported object. The mounting portion 27 is coupled to each frame portion and each reinforcing frame portion by bolts, rivets, etc. Note that the space 26 not blocked by the mounting portion 27, that is, the space 26 with an open upper side, allows a part of the casters 31A and 31B to be described later of the upper carriage 10 to enter when the same transport carriage 10 is stacked.

[0015] The guide portions 28a and 28b guide the sliding of a connecting member 61 to be described later. The guide portion 28a is located between the two front casters 31A and the two central casters 31B, and the guide portion 28b is located between the two rear casters 31A and the two central casters 31B. The guide portions 28a and 28b are located so as to straddle the two reinforcing frame portions 25d separated left and right, and are coupled to the lower surfaces of the reinforcing frame portions 25a, 25b, and 25c by bolts, rivets, etc. The guide portions 28a and 28b are each open at both left and right ends. For the guide portions 28a and 28b, angular hollow pipes made of, for example, an aluminum alloy can be used.

[0016] The traveling portion 30 travels on the traveling surface while supporting the load of the carriage main body 20 and the transported object. The traveling portion 30 has casters 31A, 31B, and auxiliary casters 50a to 50d. The casters 31A are arranged at the four corners of the carriage main body 20. The casters 31B are arranged at the center in the front-rear direction of the carriage main body 20 and separated left and right. The casters 31A and 31B are attached to the carriage main body 20 via mounting members 32A and 32B coupled to each frame portion and each reinforcing frame portion in a manner that closes the space 26 from below. The casters 31A and 31B are rotatable about a turning axis O1 along the vertical direction.

[0017] Here, the casters 31A positioned at the four corners are braked casters that can be braked or released according to the user's operation. Each caster 31A has a wheel, a support that rotatably supports the wheel, and a brake pedal. On the other hand, the caster 31B positioned in the center is a non-braked caster. Each caster 31B has a wheel and a support. The casters 31A and 31B can be attached to the trolley body 20 by attaching them to mounting members 32A and 32B respectively, and then fixing the mounting members 32A and 32B to predetermined positions on the trolley body 20 with bolts, rivets, etc. In a plan view, the casters 31A and 31B are positioned so that the wheel contact point and the pivot axis O1 are eccentric. Therefore, the casters 31A and 31B pivot around the pivot axis O1 such that the wheels are at the rear relative to the front, which is the direction of travel.

[0018] The auxiliary casters 50a to 50d are located outside the main body of the trolley 20 and function as outriggers to prevent the transport trolley 10 from tilting by making contact with the running surface (ground contact surface). The auxiliary casters 50a and 50b are positioned outside the right frame section 21c and spaced apart in the front-rear direction. The auxiliary casters 50c and 50d are positioned outside the left frame section 21d and spaced apart in the front-rear direction. In addition, the auxiliary casters 50a to 50d can pivot around a pivot axis O2 along the vertical direction.

[0019] Each auxiliary caster 50a to 50d has a wheel and a support that rotatably supports the wheel. Each auxiliary caster 50a to 50d is attached to a connecting member 61. By attaching the connecting member 61, to which each auxiliary caster 50a to 50d is attached, to the guide parts 28a and 28b, the auxiliary casters 50a to 50d can be attached to the trolley body 20. The auxiliary casters 50a to 50d are attached to one end of the connecting member 61 in the longitudinal direction. Furthermore, by fitting the other end of the connecting member 61 in the longitudinal direction into the guide portions 28a and 28b, the connecting member 61 can slide along the left-right direction, which is the longitudinal direction of the guide portions 28a and 28b. As the connecting member 61 slides relative to the guide portions 28a and 28b, the auxiliary casters 50a to 50d can transition between a first position located outside the bogie body 20 and a second position closer to the bogie body 20 than the first position. The positions of the auxiliary casters 50a to 50d shown in Figures 1 to 4 correspond to the first position, and the position where the pivot axis O2 of the auxiliary casters 50a to 50d overlaps with the bogie body 20 in a plan view corresponds to the second position.

[0020] In the first position, even when goods are loaded onto the trolley body 20 and the center of gravity of the transport trolley 10 including the goods is raised, the wheels of the auxiliary casters 50a to 50d, which are located outside the trolley body 20, are in contact with the running surface, thus preventing the transport trolley 10 from tipping over. In the second position, the pivot axis O2 of the auxiliary casters 50a to 50d overlaps with the main body 20 of the trolley, so even when the transport trolley 10 is traveling down a walkway, it is possible to prevent the auxiliary casters 50a to 50d from colliding with the walls of the walkway or the like.

[0021] The auxiliary casters 50a to 50d are set in an eccentric position between the wheel's contact point and the pivot axis O2 in a plan view. Therefore, the auxiliary casters 50a to 50d rotate around the pivot axis O2 such that the wheels are at the rear relative to the front, which is the direction of travel. Although the description above has described the auxiliary casters 50a to 50d in constant contact with the running surface, this is not the only case. The auxiliary casters 50a to 50d may be kept away from the running surface and made to contact the running surface only when the transport cart 10 begins to tilt. Also, when the auxiliary casters 50a to 50d are kept away from the running surface, they may be fixed in a direction that prevents them from swiveling, allowing the wheels to rotate along the front-to-back direction.

[0022] The transport trolley 10 can be fitted with a hand pusher 40 for the user to push by hand when the transport trolley 10 is in motion. The push member 40 is a member for the user to grip when moving the transport cart 10. The user moves the transport cart 10 by gripping the push member 40 with their hand and pushing or pulling it. In the normal specification, the push member 40 is attached to the cart body 20 by inserting it into the insertion hole 23 of the corner portion 22, and the push member 40 is removed from the cart body 20 by removing it from the insertion hole 23. On the other hand, in the specification of this embodiment, the push member 40 is attached to the accessory member 100 by inserting it into the insertion hole 133 of the accessory member 100 (described later), and the push member 40 is removed from the accessory member 100 by removing it from the insertion hole 133 of the accessory member 100. In either specification, four push members 40 can be attached to the transport cart 10. All four push members 40 have substantially the same configuration. However, this is not limited to the case where four push members 40 are attached; one to three push members 40 may be attached, or four or more push members 40 may be attached.

[0023] The push member 40 has a main body member 41, a protective member 43, and a reinforcing member 44. The main body member 41 functions as the main body of the push member 40. The main body member 41 is a rod-shaped or elongated pipe-shaped member. The main body member 41 can be made of, for example, an aluminum alloy member formed by extrusion molding. The main body member 41 is reinforced internally in a cross shape to improve its strength. The portion of the main body member 41 from the upper end of the main body member 41 to the upper end of the protective member 43 is the grip portion 42 that the user grasps with their hand when moving the transport cart 10.

[0024] The protective member 43 functions as a protective part that prevents the user's hand from coming into contact with surrounding objects when the user grasps the push member 40. The protective member 43 also serves as a protective part for loading transported goods. This serves as an indicator of the maximum load height at that time. The protective member 43 is fixed to the upper side of the main body member 41 at a predetermined distance from the upper end using bolts, rivets, etc. The protective member 43 is disc-shaped and protrudes outward from the outer circumferential surface of the main body member 41, and has a larger outer diameter than the main body member 41.

[0025] The reinforcing member 44 functions as a reinforcement that strengthens the main body member 41. Furthermore, the reinforcing member 44 suppresses looseness between the main body member 41 and the insertion holes 23 and 133 when the main body member 41 is inserted into the insertion holes 23 of the corner portion 22 or the insertion holes 133 of the accessory member 100. The reinforcing member 44 is a roughly cylindrical shape that is long in the vertical direction and is fixed to the lower end of the main body member 41 with bolts, rivets, etc., when the main body member 41 is inserted. Figure 7(b) is a cross-sectional view obtained by cutting the push member 40 horizontally so as to pass through the reinforcing member 44. The reinforcing member 44 has an anti-rotation portion 45 on which a part of its outer circumferential surface bulges outward. In Figure 7(b), the diameter of the outer circumference of the reinforcing member 44 that does not pass through the anti-rotation portion 45 is indicated by D1. The reinforcing member 44 can be made of, for example, an aluminum alloy member formed by extrusion molding.

[0026] In the transport trolley 10 configured as described above, when loading transport items onto the trolley body 20, if the transport items are large, they may not fit on the trolley body 20 or may protrude significantly from the trolley body 20. Also, in the transport trolley 10 described above, when the push member 40 is attached to the trolley body 20, if the transport items are large, they may interfere with the push member 40 and cannot be loaded onto the trolley body 20. In such cases, attaching the accessory member 100 to the transport trolley 10 makes it possible to load large transport items onto the loading section 110.

[0027] Next, the accessory component 100 will be described. The accessory members 100 are detachable from the trolley body 20 of the transport trolley 10. In this embodiment, multiple (two in this case) accessory members 100 are attached to the trolley body 20. Specifically, one accessory member 100 is attached to the front of the trolley body 20, and one accessory member 100 is attached to the rear of the trolley body 20. The two accessory members 100 attached to the front and rear of the trolley body 20 have the same configuration and can be interchanged when attached to the trolley body 20.

[0028] Figure 8(a) shows the attached member 100 viewed from the front and rear, Figure 8(b) shows the attached member 100 viewed from below, and Figure 8(c) shows the attached member 100 viewed from the side. The accessory member 100 is elongated with its longitudinal direction running horizontally. If the length of the accessory member 100 in the horizontal direction is S, then length S is shorter than the length L1 in the front-to-back direction of the bogie body 20, and longer than the length L2 in the horizontal direction.

[0029] The accessory component 100 has a loading section 110, a detachable section 120, and a mounting section 130. The loading section 110 is the part on which the transported goods are loaded. The loading section 110 is a straight member with its longitudinal direction running horizontally. The upper part 111 and the lower part 112 of the loading section 110 are both flat surfaces, and the surfaces of the upper part 111 and the lower part 112 are parallel. By placing the transported goods on the upper part 111, the transported goods are loaded onto the loading section 110. The loading section 110 can be made of, for example, a square hollow pipe made of aluminum alloy.

[0030] The detachable part 120 is the part to which the attached member 100 is attached to the corner portion 22 of the bogie body 20. The detachable part 120 is a cylindrical member that is oriented vertically. The upper end of the detachable part 120 is connected to the lower part 112 of the loading section 110 with bolts, rivets, etc. Two detachable parts 120 are provided, separated from each other in the left-right direction of the loading section 110. The distance between the two detachable parts 120 is approximately the same as the distance between the corner portions 22 located separately on the left and right sides of the bogie body 20. Although the detachable part 120 is not attached to or detached from the insertion hole 133 of the mounting section 130, which will be described later, the detachable part 120 When considering its shape, it is designed to be detachable from the insertion hole 133 of the mounting portion 130. The detachable portion 120 can be, for example, a circular hollow pipe made of aluminum alloy.

[0031] Figure 7(c) is a cross-sectional view of the detachable portion 120 cut horizontally. In Figure 7(c), the outer diameter of the detachable portion 120 is indicated by D2. The diameter D2 of the detachable portion 120 and the outer diameter D1 of the lower end of the push member 40 (reinforcement member 44) are approximately the same. The attachment components 100 are attached to the bogie body 20 by inserting the two attachment parts 120 into the insertion holes 23 of the corner parts 22, which are located separately to the left and right.

[0032] The mounting portion 130 is the part for attaching the push member 40. The mounting portion 130 corresponds to an example of a mounting portion on the accessory member side. Two mounting portions 130 are provided on both the left and right sides of the loading portion 110. The two mounting portions 130 have a symmetrical configuration. Figure 7(d) is a plan view showing an example of the configuration of the mounting portion 130. The mounting portion 130 has a cylindrical portion 134, a connecting portion 135, and a support portion 136. The cylindrical portion 134 has an insertion hole 133 formed inside that runs vertically. The shape of the insertion hole 133 is substantially the same as the shape of the insertion hole 23 of the corner portion 22. The push member 40 is attached to the accessory member 100 by inserting the push member 40 into the insertion hole 133. The connecting portion 135 connects the loading portion 110 using bolts, rivets, welding, etc. The connecting portion 135 connects the loading portion 110 with the loading portion 110 sandwiched between a pair of side walls. The support portion 136 is positioned to cross the lower opening of the insertion hole 133. The support portion 136 consists of a bolt that crosses the insertion hole 133 horizontally and a nut that secures the bolt so that it does not come off. The support portion 136 supports the lower end of the push member 40 inserted into the insertion hole 133. The mounting portion 130 can be made of, for example, an aluminum alloy member formed by extrusion molding.

[0033] In the mounting portion 130, the support portion 136 is located slightly above the lower end of the cylindrical portion 134. On the other hand, in the corner portion 22, the support portion 36 is located at the lower end of the cylindrical portion 34. Therefore, the vertical length of the cylindrical portion 134 is longer than the vertical length of the cylindrical portion 34 of the corner portion 22, so that the length to which the push member 40 is inserted into the insertion hole 133 of the mounting portion 130 is the same as the length to which the push member 40 is inserted into the insertion hole 23 of the corner portion 22. However, the support portion 136 of the mounting portion 130 may have the same configuration as the support portion 36 of the corner portion 22.

[0034] When attaching the aforementioned accessory members 100 to the transport trolley 10, two accessory members 100 are attached to the front and rear of the trolley body 20, respectively. Specifically, one accessory member 100 can be attached to the front of the trolley body 20 by inserting the attachment / detachment part 120 of the accessory member 100 from above into the insertion holes 23 of the left and right corner sections 22 located at the front. Similarly, one accessory member 100 can be attached to the rear of the trolley body 20 by inserting the attachment / detachment part 120 of the accessory member 100 from above into the insertion holes 23 of the left and right corner sections 22 located at the rear.

[0035] Next, we will describe the state in which the two accessory components 100 are attached to the transport trolley 10. As shown in Figures 4 and 5, when the accessory member 100 is attached to the bogie body 20, the lower part 112 of the loading section 110 faces the upper surface of the bogie body 20, and the upper part 111 of the loading section 110 is located above the upper end of the bogie body 20. The load of the accessory member 100 is mainly supported by the upper surface of the bogie body 20. Furthermore, as shown in Figure 3, when the accessory member 100 is attached to the bogie body 20, at least a portion of the loading section 110 is located outside the bogie body 20. The loading section 110 has a portion that overlaps with the bogie body 20 and a portion that extends outward from the end of the bogie body 20 and does not overlap with the bogie body 20. Specifically, in the case of the front accessory member 100, the center of the loading section 110 overlaps with the front frame 21a and the front left and right corner portions 22, while the left and right sides of the loading section 110 do not overlap with the bogie body 20 and are located outside the bogie body 20. In the rear attachment member 100, the center of the loading section 110 overlaps with the rear frame section 21b and the rear left and right corner sections 22, and the left and right sides of the loading section 110 do not overlap with the bogie body section 20 but are located outside the bogie body section 20.

[0036] Furthermore, as shown in Figure 3, the front and rear loading sections 110 protrude outward from the right end of the bogie body 20 toward the right, and protrude outward from the left end of the bogie body 20 toward the left. Here, the amount of protrusion of the loading section 110 outward from the right end of the bogie body 20 toward the right is indicated by Sa, and the amount of protrusion of the loading section 110 outward from the left end of the bogie body 20 toward the left is indicated by Sb, and the protrusion amounts Sa and Sb are approximately the same. On the other hand, the front and rear loading sections 110 do not protrude forward and backward from the front and rear ends of the bogie body 20, respectively, but are contained within the length of the bogie body 20 in the front-rear direction. That is, the protrusion amounts Sa and Sb of the loading section 110 outward in the left-right direction from the ends of the bogie body 20 are greater than the protrusion amounts of the loading section 110 outward in the front-rear direction from the ends of the bogie body 20. However, the front and rear loading sections 110 may protrude forward and backward from the front and rear ends of the trolley body 20, respectively.

[0037] Furthermore, as shown in Figure 3, when the accessory member 100 is attached to the bogie body 20, the mounting portion 130 is located outside the bogie body 20 without overlapping with it. Specifically, the right mounting portion 130 of the front and rear accessory member 100 is located to the right of the right end of the bogie body 20, and the left mounting portion 130 is located to the left of the left end of the bogie body 20. On the other hand, the mounting portions 130 of the front and rear accessory member 100 do not protrude forward and backward from the front and rear ends of the bogie body 20, respectively, but remain within the length of the bogie body 20 in the front-rear direction. However, the mounting portions 130 of the front and rear accessory member 100 may protrude forward and backward from the front and rear ends of the bogie body 20, respectively.

[0038] Thus, in a plan view, the loading section 110 of the accessory member 100 is located outside the main body 20 of the trolley, which expands the area in which goods can be loaded compared to simply loading them onto the main body 20. Therefore, by attaching the accessory member 100 to the main body 20 of the trolley, larger goods can be loaded than would be possible by loading them onto the main body 20. Furthermore, in a plan view, the mounting portion 130 of the accessory member 100 is located on the outside of the trolley body 20, so that even when large items are loaded onto the loading section 110, the push member 40 attached to the mounting portion 130 does not interfere with the items being transported. Therefore, by attaching the accessory member 100 to the trolley body 20, it is possible to load larger items than can be loaded onto the trolley body 20.

[0039] Next, we will explain, with reference to Figures 4 and 5, the case in which stacked plasterboards B are loaded onto the transport trolley 10 equipped with the accessory member 100 as an example of a large transport item. In Figures 4 and 5, the plasterboards B are shown by a dashed line. The plasterboards B are flat and have dimensions of, for example, 1820 mm × 910 mm (long side × short side). If the plasterboards B are loaded onto the trolley body 20 without the accessory member 100, the plasterboards B will protrude significantly from the trolley body 20 in both the front-to-back and left-to-right directions. Furthermore, because the plasterboards B overlap with the corner portion 22 of the trolley body 20, it is not possible to insert the push member 40 into the insertion hole 23 of the corner portion 22.

[0040] On the other hand, by attaching the accessory member 100 to the transport trolley 10, the loading portion 110 of the accessory member 100 is located outside the trolley body 20, thus expanding the area in which transported goods can be loaded. As shown in Figures 4 and 5, with the longitudinal direction of the transport trolley 10 aligned with the longitudinal direction of the plasterboard B, and the short direction of the transport trolley 10 aligned with the short direction of the plasterboard B, the plasterboard B is positioned between the loading portion 110 of the front accessory member 100 and the rear accessory member 100. The plasterboard B is loaded so as to span across the loading section 110. By loading the plasterboard B in this manner, it is possible to load the plasterboard B without it protruding from the loading section 110 in the left-right direction.

[0041] Furthermore, the mounting portion 130 of the accessory member 100 is located on the outside of the trolley body 20 and does not overlap with the plasterboard B loaded on the loading section 110, so the push member 40 can be inserted into the insertion hole 133 of the mounting portion 130 without interfering with the plasterboard B. Therefore, even when the accessory member 100 is attached to the transport trolley 10, the transport trolley 10 can be driven by grasping the push member 40 by hand and pushing or pulling it. In plan view, a part of the protective member 43 of the push member 40 is positioned to overlap with the loading section 110. Therefore, if too many plasterboard B are stacked, the plasterboard B will interfere with the protective member 43 of the push member 40, so even when the push member 40 is attached to the mounting portion 130 of the accessory member 100, the protective member 43 can be used as an indicator of the maximum loading height.

[0042] Furthermore, as shown in Figure 5, when the plasterboard B is loaded, a gap is created between the bottom plasterboard B and the trolley body 20 that allows for the insertion of forklift forks from the horizontal direction. Therefore, a forklift can be used when loading the plasterboard B onto the loading section 110 of the transport trolley 10, or conversely, when loading or unloading the plasterboard B loaded onto the loading section 110, making it easy to load and unload the plasterboard B.

[0043] Furthermore, since the transport trolley 10 has auxiliary casters 50a to 50d located outside the main trolley body 20, even if a large load is placed on the loading section 110 of the attached component 100, and the center of gravity of the transport trolley 10 including the load becomes high, the auxiliary casters 50a to 50d remain in contact with the running surface, thus preventing the transport trolley 10 from tipping over.

[0044] Furthermore, when not loading large items, the attachment part 120 of the attachment part 100 can be removed from the trolley body 20 by pulling it out through the insertion hole 23 in the corner part 22 of the trolley body 20. By removing the attachment part 100 from the trolley body 20 in this way, the transport trolley 10 can be returned to its normal specifications. Therefore, it is not necessary to prepare transport trolleys of different sizes for different sizes of items being transported, thus reducing the number of transport trolley types. In addition, since the attachment part 100 removed from the trolley body 20 is small, it can reduce the storage space required compared to the transport trolley 10.

[0045] As described above, when the auxiliary member 100 for the transport trolley of this embodiment is attached to the transport trolley 10, at least a part of the loading section 110 is located outside the trolley body 20, thus expanding the area in which transported goods can be loaded. Therefore, with the auxiliary member 100 for the transport trolley, large transported goods can be loaded onto the loading section 110, making it easy to transport large items.

[0046] <Second Embodiment> In the first embodiment, the accessory member 100 was described in the case where the shape of the insertion hole 133 of the mounting portion 130 is substantially the same as the shape of the insertion hole 23 of the corner portion 22. In this embodiment, the accessory member 200 will be described in the case where the shape of the insertion hole is different from that of the first embodiment. Components similar to those in the first embodiment are denoted by the same reference numerals and their description is omitted.

[0047] Figure 9(a) is a perspective view showing the surrounding configuration of the accessory member 200 in the second embodiment. Figure 9(b) is a plan view of the accessory member 200. The accessory component 200 has a loading section 110, a detachable section 120, and a mounting section 230.

[0048] The mounting portion 230 is the part for attaching the push member 40. The mounting portion 230 corresponds to an example of a mounting portion on the accessory member side. Two mounting portions 230 are provided on both the left and right sides of the loading portion 110. The two mounting portions 230 have a symmetrical configuration. The mounting portion 230 has a cylindrical portion 234, a connecting portion 135, and a support portion 136. As shown in Figure 9(b), the cylindrical portion 234 has a shape that is symmetrical front to back with respect to the center line Ca between the pair of connecting portions 135. The outer surface of the cylindrical portion 234 that intersects the center line Ca is arc-shaped, which can mitigate impact when the cylindrical portion 234 comes into contact with obstacles around the transport trolley 10. In addition, the cylindrical portion 234 has an insertion hole 233 formed inside that is oriented vertically. When the push member 40 is inserted into the insertion hole 233, the central axis Oa of the push member 40 is located approximately on the center line Ca.

[0049] The shape of the insertion hole 233 differs from that of the insertion hole 23 in the corner portion 22. The insertion hole 233 is formed so that its length La in the front-to-back direction is greater than its length Lb in the left-to-right direction. The front inner surface and the rear inner surface of the insertion hole 233 have a pair of protrusions 235 formed thereon to substantially match the shape of the outer surface of the anti-rotation portion 45 of the reinforcing member 44 of the push member 40. When the push member 40 is inserted into the insertion hole 233, the anti-rotation portion 45 of the reinforcing member 44 is positioned front to back, and the push member 40 is attached to the accessory member 200 while being restricted by the protrusions 235 of the insertion hole 233, etc. In Figure 9(b), the reinforcing member 44 is shown by a dashed line.

[0050] In this embodiment, the attached member 200 is mounted such that the anti-rotation portion 45 of the reinforcing member 44 is positioned front to back. Therefore, when a user grasps the push member 40 with their hand and pushes or pulls it back and forth to move the transport cart 10, the pushing and pulling force can be easily transmitted to the attached member 200 via the anti-rotation portion 45.

[0051] <Third Embodiment> In the first embodiment, the case in which the attached member 100 is attached to the bogie body 20 by inserting the attachment / detachment portion 120 of the attached member 100 into the insertion holes 23 of the left and right corner portions 22 from above was described. The attached member 300 in this embodiment has a connecting portion 310 that connects to the connected portion 530 of the bogie body 520. Components similar to those in the first embodiment are denoted by the same reference numerals and their description is omitted.

[0052] Figure 10 is a perspective view showing the transport trolley 510 before the attachment of the accessory component 300. The accessory component 300 has a loading section 110, a detachable section 120, a mounting section 130, and a connecting section 310.

[0053] The connecting portion 310 is the part that connects the attached member 300 to the connected portion 530 of the bogie body 520. Specifically, the connecting portion 310 is a cylindrical member oriented vertically. Here, the diameter of the connecting portion 310 is smaller than the diameter of the attachment / detachment portion 120. For example, the connecting portion 310 can be made of a hollow pipe made of aluminum alloy. The upper end of the connecting portion 310 is connected to the lower part 112 of the loading portion 110 by bolts, rivets, welding, etc. The connecting portion 310 is provided between two attachment / detachment portions 120 that are separated to the left and right. Note that the connecting portion 310 is not limited to being cylindrical, but can be any shape that can be connected to the connected portion 530 of the bogie body 520.

[0054] On the other hand, the bogie body 520 does not have a mounting portion 27, and the reinforcing frame portions 25a to 25d are exposed. The bogie body 520 has a connected portion 530 that is connected to the connecting portion 310. Specifically, the connected portion 530 is a hole formed in the upper surface of the front frame portion 21a and the rear frame portion 21b (the front frame portion 21a is not shown). The hole in the connected portion 530 does not penetrate to the lower surface of the front frame portion 21a and the rear frame portion 21b, but it may penetrate vertically from the upper surface to the lower surface. Note that the connected portion 530 is not limited to a hole, and may be any shape to which the connecting portion 310 of the accessory member 300 is connected.

[0055] When attaching the aforementioned accessory member 300 to the transport trolley 510, the attachment / detachment portion 120 of the accessory member 300 is inserted from above into the insertion holes 23 of the left and right corner portions 22, and the connecting portion 310 is inserted into the hole of the connecting portion 530, thereby attaching the accessory member 300 to the trolley body portion 520.

[0056] Thus, by having a connecting portion 310, the accessory member 300 can be prevented from being attached to a transport trolley that does not have a connecting portion 530. By providing a connecting portion 530 to transport trolleys equipped with an outrigger function to prevent tipping, and not providing a connecting portion 530 to transport trolleys that do not have an outrigger function to prevent tipping, the accessory member 300 can be prevented from being attached to transport trolleys that do not have an outrigger function to prevent tipping. Although attaching the accessory member 300 raises the center of gravity of the transport trolley 510, including the transported goods, making it more prone to tipping, the accessory member 300 can only be attached to transport trolleys equipped with an outrigger function, so the outrigger function can prevent the transport trolley 510 from tipping.

[0057] <Fourth Embodiment> In the first embodiment, a case was described in which the tilting of the transport trolley 10 is prevented by auxiliary casters 50a to 50d acting as outriggers. The accessory member 400 of this embodiment has a tilting contact portion 410 that contacts the running surface when the transport trolley 610 tilts. Components similar to those in the first embodiment are denoted by the same reference numerals and their description is omitted.

[0058] Figure 11 is a perspective view showing the transport trolley 610 with the accessory member 400 attached, before the hand push member 40 is attached to the accessory member 400. Figure 12 is a front view showing the transport trolley 610 with the accessory member 400 attached. The trolley body 620 of the transport trolley 610 in this embodiment does not have auxiliary casters. The accessory component 400 has a loading section 110, a detachable section 120, a mounting section 130, and a tilting contact section 410.

[0059] The tilting contact portion 410 is the part that contacts the running surface when the transport trolley 610 is tilted. Specifically, the tilting contact portion 410 is a cylindrical member oriented in the vertical direction. For example, the tilting contact portion 410 can be made of a hollow pipe made of aluminum alloy. The tilting contact portion 410 is connected to the left and right mounting portions 130 by bolts, rivets, welding, etc. In a side view, the tilting contact portion 410 protrudes below the lower part 112 of the loading portion 110. When the push member 40 is attached to the mounting portion 130, the tilting contact portion 410 protrudes as if the main body member 41 of the push member 40 were extended downward. In addition, a synthetic resin cap 411 is attached to the lower end of the tilting contact portion 410 to prevent damage to the running surface or to mitigate impact when the tilting contact portion 410 contacts the running surface. Furthermore, the tilting contact portion 410 is not limited to being cylindrical; any shape that can contact the running surface when the transport trolley 610 is tilted is acceptable.

[0060] Here, the lower end of the tilting contact portion 410 (the lower end of the cap 411) is lower than the lower end of the corner portion 22, so when the transport trolley 610 tilts, the tilting contact portion 410 contacts the running surface before the corner portion 22. Therefore, when the transport trolley 610 tilts, the tilting contact portion 410 contacts the running surface, which prevents the transport trolley 610 from tilting further. Furthermore, the tilting contact portion 410 is not limited to being connected to the mounting portion 130, but may also be connected to the loading portion 110. Also, in Figure 12, the lower end of the tilting contact portion 410 (the lower end of the cap 411) is higher than the axle of the caster 31A's wheel, but it may also be lower than the axle of the caster 31A's wheel.

[0061] Although the present invention has been described above with reference to the embodiments described above, the present invention is not limited to the embodiments described above, and the configuration of the embodiments described above can be modified as appropriate, and parts of each of the embodiments described above can be combined with other embodiments as appropriate. In the embodiment described above, the attachment of the attachment members 100 to 400 to the bogie body 20, 520, and 620 was described by inserting the two attachment / detachment portions 120 of the attachment members 100 to 400 into the insertion holes 23 of the corner portions 22 which are located separately to the left and right. However, the invention is not limited to this case. The attachment members 100 to 400 may also be detachable from other parts of the bogie body 20, 520, and 620.

[0062] In the embodiments described above, the case in which the auxiliary members 100 to 400 are not included in the configuration of the transport trolleys 10, 510, and 610 was explained. However, the invention is not limited to this case, and the auxiliary members 100 to 400 may be part of the configuration of the transport trolleys 10, 510, and 610. In the embodiment described above, the support portion 36 of the corner portion 22 was described as being arranged to cross the lower opening of the insertion hole 23 horizontally, but it may also be configured similarly to the support portion 136 of the accessory members 100 to 400. In the embodiments described above, the case in which the trolley body portions 20 and 620 have mounting portions 27 has been described, but the invention is not limited to this case, and the trolley body portions 20 and 620 may not have mounting portions 27, and the reinforcing frame portions 25a to 25d may be exposed in a plan view. The mounting portion 130 of the accessory members 300 and 400 in the third and fourth embodiments described above may be changed to the mounting portion 230 of the second embodiment. [Explanation of Symbols]

[0063] 10, 510, 610: Transport cart 20, 520, 620: Cart body 22: Corner section (mounting section on the transport cart side) 31A, 31B: Caster 40: Pushing member 100, 200, 300, 400: Accessory members 110: Loading section 120: Detachable section 130, 230: Mounting section (mounting section on the accessory member side)

Claims

1. An accessory component for a transport trolley that is detachable from a transport trolley, comprising a trolley body and casters attached to the trolley body, With the aforementioned accessory components attached to the transport trolley, a loading section is provided that allows for the loading of items larger than those loaded onto the trolley body, The attached member has a mounting portion on the side of the accessory member to which a push member is attached for the user to push the transport cart by hand when it is being moved, The attachment portion on the attachment member side is characterized in that, when the attachment member is attached to the transport trolley, it is positioned so as not to overlap with the trolley body in a plan view.

2. The accessory member for a transport trolley according to claim 1, characterized in that at least a portion of the loading section is located outside the main body of the trolley when the accessory member is attached to the transport trolley.

3. The loading portion is characterized in that, when the accessory member is attached to the transport trolley, it has a portion that overlaps with the trolley body in a plan view and a portion that protrudes outward from the end of the trolley body and does not overlap with the trolley body, as described in claim 1.

4. The bogie body is substantially rectangular in shape, with the first direction being the longitudinal direction and the second direction perpendicular to the first direction being the short direction, The loading section is characterized in that, when the accessory member is attached to the transport trolley, the amount of protrusion outward from the end of the trolley body in the second direction in a plan view is greater than the amount of protrusion outward from the end of the trolley body in the first direction, as described in claim 1 for an accessory member for a transport trolley.

5. An accessory component for a transport trolley that is detachable from a transport trolley comprising a trolley body and casters attached to the trolley body, With the aforementioned accessory components attached to the transport trolley, a loading section is provided that allows for the loading of items larger than those loaded onto the trolley body, The attachment part on the accessory side is for attaching a pusher that the user uses to push the transport trolley by hand when it is being moved, It has a detachable part that can be attached to and detached from the mounting part on the transport trolley side to which the hand-pushing member is attached, The attachment portion is characterized in that it is shaped to be detachable from both the attachment portion on the transport trolley side and the attachment portion on the attachment member side.

6. The loading portion is positioned to overlap with the mounting portion on the transport trolley side in a plan view when the accessory member is attached to the transport trolley, as described in claim 5.

7. The mounting portion on the transport trolley side has a support portion that supports the hand-pushing member, The attachment portion is characterized in that a gap is formed between the attachment portion and the support portion when the attachment portion is attached to the mounting portion on the transport trolley side, as described in claim 5.

8. An accessory component for a transport trolley that is detachable from a transport trolley, comprising a trolley body and casters attached to the trolley body, With the aforementioned accessory components attached to the transport trolley, a loading section is provided that allows for the loading of items larger than those loaded onto the trolley body, The attachment part on the accessory side is for attaching a pusher that the user uses to push the transport trolley by hand when it is being moved, An accessory member for a transport trolley, characterized in that the lower side of the mounting portion on the accessory member side has a contact portion that comes into contact with the running surface when the transport trolley is tilted.

9. The trolley body portion, The aforementioned caster and, A transport trolley characterized by comprising an accessory member as described in any one of claims 1 to 8.

10. The transport cart according to claim 9, characterized in that it comprises a plurality of the aforementioned auxiliary members.

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