Push member and protection member

Abstract

To enable transported objects to be loaded or unloaded easily.SOLUTION: The invention is a push member 40 attached to a dolly body part 20 of a transport dolly 1 and has: grip parts 42, each of which is gripped by a hand of a user; and protection parts 52, each of which protrudes to the outer side relative to an outer peripheral surface of the grip part 42 and protects the hand gripping the grip part 42 so that the hand does not contact with objects in a periphery. The protection part 52 has a shape that inhibits interference with transported object when the transported object is loaded into or unloaded from the dolly body part 20 in a state that the push members 40 are attached to the dolly body part 20.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a push member and a protective member, and more particularly to a push member and a protective member that protect a user's hands from coming into contact with objects around a transport cart. [Background technology]

[0002] Transport carts are used at construction sites, etc. For example, Patent Document 1 discloses a hand push member having a protective part that protects the user's hands so that the user's hands do not come into contact with objects around the transport cart. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2018-39491 Summary of the Invention [Problem to be solved by the invention]

[0004] With the push member of Patent Document 1, when a user loads or unloads an article onto or off the carriage body of the transport carriage, the protective part gets in the way, and there is a risk that the article cannot be easily loaded or unloaded. The present invention has been made in consideration of the above-mentioned problems, and an object of the present invention is to make it possible to easily load and unload transported goods. [Means for solving the problem]

[0005] The present invention is a hand push member that is detachably attached to the cart main body of a transport cart, and has a grip portion that a user grasps with their hand, and a protective portion that protrudes outward from the outer surface of the grip portion to protect the hand grasping the grip portion, and is characterized in that the protective portion is shaped to prevent interference with the transported item when the transported item is loaded or unloaded onto the cart main body while the hand push member is attached to the cart main body. [Effects of the Invention]

[0006] According to the present invention, transported goods can be easily loaded and unloaded. [Brief explanation of the drawings]

[0007] [Figure 1] FIG. 2 is a perspective view showing an example of a transport cart according to the first embodiment. [Figure 2] FIG. 2 is a side view showing an example of a transport cart. [Figure 3] FIG. [Figure 4] FIG. 2 is a plan view showing an example of a transport cart. [Figure 5] FIG. 10 is a rear view showing an example of a hand push member. [Figure 6] FIG. 10 is a diagram illustrating an example of a reinforcing member. [Figure 7] FIG. 2 is a diagram illustrating an example of a protective member. [Figure 8] FIG. 10 is a diagram showing an example of a protection member according to a first modified example. [Figure 9] FIG. 10 is a diagram showing an example of a protection member according to a second modified example. [Figure 10] FIG. 10 is a perspective view showing an example of a transport cart according to a second embodiment. [Figure 11] FIG. 2 is a diagram illustrating an example of a protective member. [Figure 12] FIG. 10 is a diagram showing an example of a protection member according to a third modified example. [Figure 13] FIG. 10 is a perspective view showing an example of a transport cart according to a third embodiment. [Figure 14] FIG. 2 is a diagram illustrating an example of a protective member. [Figure 15] FIG. 10 is a perspective view showing an example of a transport cart according to a fourth embodiment. [Figure 16] FIG. 2 is a diagram illustrating an example of a protective member. [Figure 17] FIG. 10 is a perspective view showing an example of a transport cart according to a fifth embodiment. [Figure 18] FIG. 2 is a diagram illustrating an example of a protective member. [Figure 19] FIG. 13 is a perspective view showing an example of a transport cart according to a sixth embodiment. [Figure 20] FIG. 2 is a diagram illustrating an example of a protective member. [Figure 21] FIG. 13 is a perspective view showing an example of a protection member according to a seventh embodiment. [Figure 22] 10A and 10B are diagrams showing examples of protective members according to fourth and fifth modified examples. DETAILED DESCRIPTION OF THE INVENTION

[0008] The push members and protective members according to the embodiments will be described below with reference to the drawings. For ease of explanation, the up-down direction of the push members and protective members shown in the following embodiments is based on the direction when the push members are attached to the cart body. The front-to-rear direction of the transport cart is the longitudinal direction of the transport cart, and the left-to-right direction is the lateral direction of the transport cart. However, the transport cart of this embodiment can travel in any direction, including front-to-rear and left-to-right.

[0009] First Embodiment Fig. 1 is a perspective view showing an example of a transporter cart 1 according to the first embodiment. Fig. 2 is a side view showing an example of the transporter cart 1. Fig. 3 is a rear view of the transporter cart 1 as seen from the rear side. Fig. 4 is a plan view showing an example of the transporter cart 1. Note that Fig. 1 shows the state before the push member 40 is attached to the cart main body 20, and Figs. 2 to 4 show the state after the push member 40 has been attached to the cart main body 20. The transport cart 1 includes a cart body 20, a running section 30, and a push member 40. First, the carriage main body 20 will be described. The carriage body 20 is formed by connecting a plurality of frame sections and the like, and is used to carry transported goods. In a plan view, the carriage body 20 is substantially rectangular, with the longitudinal direction being the front-to-rear direction and the transverse direction being the left-to-right direction. The carriage body 20 has a front frame section 21a, a rear frame section 21b, a right frame section 21c, a left frame section 21d, corner members 22, a reinforcing frame section (reinforcing section) 25, a loading plate 26, etc.

[0010] The front frame portion 21a, the rear frame portion 21b, the right frame portion 21c, and the left frame portion 21d may be made of, for example, a rectangular hollow pipe made of an aluminum alloy. The corner members 22 are made of, for example, an aluminum alloy formed by extrusion molding. The corner members 22 have insertion holes 23 that open upward and stopper portions 24 (see FIG. 5) that close the downward end. A push member 40 is inserted into the insertion hole 23 of the corner member 22. The lower end of the push member 40 inserted into the insertion hole 23 is supported by the stopper portion 24.

[0011] The front frame portion 21a, the rear frame portion 21b, the right frame portion 21c, and the left frame portion 21d are joined at their four corners by corner members 22 to form a substantially rectangular four-sided frame. Within the frame, a plurality of reinforcing frame portions 25 are butted together in the front-rear and left-right directions and joined by screws, rivets, welding, etc. to form a lattice pattern. The reinforcing frame portions 25 can be, for example, rectangular hollow pipes made of aluminum alloy or plates with an uneven cross section. The loading plate 26 is a flat plate for carrying transported goods, and is joined to each frame portion and each reinforcing frame portion 25 by rivets or screws.

[0012] The running unit 30 runs on the running surface while supporting the load of the carriage body 20 and the transported object. The running unit 30 has a plurality of casters 31, 32. In this embodiment, the running unit 30 has six casters: four casters 31 located at the four corners of the carriage body 20 and two casters 32 located at the center in the front-to-rear direction and spaced apart on the left and right. Each caster 31, 32 has a wheel 33 and a fork member 34 that rotatably supports the wheel 33. The casters 31, 32 are each attached to the carriage body 20 via a mounting plate. Each caster 31, 32 is rotatable around a vertical axis O. Four casters 31 are braked, and two casters 32 are non-brake. Each of the four braked casters 31 has a brake pedal 35 that can swing up and down.

[0013] The push member 40 is a member that the user pushes by hand when traveling the transport cart 1. The push member 40 is long and approximately 1000 mm in length. The push member 40 is attached to the cart body 20 by inserting its lower end into the insertion hole 23 of the corner member 22, and is detachable from the cart body 20 by pulling it out of the insertion hole 23. The transport cart 1 of this embodiment has four push members 40 (40A to 40D), which are inserted into the insertion holes 23 of the corner members 22. Here, push member 40A is located on the right side and rear, push member 40B is located on the left side and rear, push member 40C is located on the right side and front, and push member 40D is located on the left side and front. Note that when there is no need to distinguish between the push members 40A to 40D, they will be simply referred to as push members 40. Furthermore, it is not necessary to attach all four push members 40A to 40D to the cart body 20, and only one, two, or three push members 40 may be attached to the cart body 20.

[0014] FIG. 5 is a rear view showing an example of the push member 40. As shown in FIG. The push member 40 has a main body member 41 as a main body portion, a protective member 51, and a reinforcing member 60. The main body member 41 is a long, pipe-like member or a rod-like member. To reduce weight, the main body member 41 is made of, for example, an aluminum alloy and formed by extrusion molding. The main body member 41 is a circular tube with an outer diameter of, for example, 42 to 45 mm (here, 44 mm), which is an outer diameter that is easy for a user to grip. The main body member 41 is also reinforced inside in a cross shape to improve its strength. However, the main body member 41 is not limited to the above-mentioned dimensions and shape, and various rod-like members, tubular members, single pipes (general structural carbon steel pipes specified in JIS G 3444), etc. can be used.

[0015] The protective member 51 protects the user's hands and also serves as an indicator of the maximum loading height when loading transported items. The protective member 51 is fixed to the upper side of the main body member 41 at a predetermined distance from the upper end with bolts, rivets, etc. In this embodiment, the protective member 51 is preferably fixed at a position 100 to 200 mm, more preferably 120 to 180 mm, from the upper end of the main body member 41. The range of the main body member 41 from the upper end of the main body member 41 to the upper end of the protective member 51 forms the grip portion 42 that the user holds with their hand when moving the transport cart 1.

[0016] The protective member 51 of this embodiment will be described with reference to Fig. 7. Figs. 7(a) to (d) are a plan view, a side view, a rear view, and a perspective view, respectively, of the protective member 51. The direction shown in Fig. 7(a) indicates the direction of the protective member 51 of the hand push member 40A as an example. The protective member 51 includes a protective portion 52 and an attachment portion 53, which are integrally formed. The protective member 51 also includes attachment holes 54 that open at the top and bottom to allow the main body member 41 to be inserted therein. The protective member 51 is made of a resin material, such as polyethylene, and is integrally formed by injection molding. To improve visibility, the protective member 51 is colored differently from the bogie main body 20, specifically, the front frame portion 21a, the rear frame portion 21b, the right frame portion 21c, and the left frame portion 21d. For example, if the front frame portion 21a, the rear frame portion 21b, the right frame portion 21c, and the left frame portion 21d are metallic in color, such as silver, the protective member 51 may be colored in a color other than the metallic color, such as one of the three primary colors, e.g., red, green, and blue, or orange or yellow. The protective member 51 is also colored differently from the main body member 41. For example, if the main body member 41 is a metallic color such as silver, the metallic color may be a different color, for example, one of the three primary colors such as red, green, and blue, or may be orange, yellow, or the like.

[0017] The protective portion 52 is shaped to protrude outward from the outer peripheral surface (outer surface) of the grip portion 42, thereby protecting the user's hand when gripping the grip portion 42. Furthermore, when the push member 40 is attached to the cart body 20, the protective portion 52 is shaped to prevent interference with the transported object when loading or unloading the transported object onto or from the cart body 20. In this embodiment, the protective portion 52 has an outline (or a part of the outline) of a substantially circular shape in plan view (or when viewed from the longitudinal direction of the grip portion 42), with a cutout portion of the outline being a substantially semicircular shape in this case. In FIG. 7(a), the cutout portion of the circle is indicated by a two-dot chain line. In plan view, the protective portion 52 has a substantially semicircular shape with its center approximately at the center of the attachment portion 53 (or the center of the main body member 41). In this embodiment, the center of the attachment portion 53 approximately coincides with the center of the main body member 41 and the center of the grip portion 42. The term "approximately semicircular" is not limited to a shape obtained by cutting out an approximately circle at an angle of 180 degrees, but may also refer to a shape obtained by cutting out an approximately circle over an angle range of 135 degrees, a shape obtained by cutting out an approximately circle over an angle range of 225 degrees, or a shape obtained by cutting out an arbitrary angle range between 135 degrees and 225 degrees. Furthermore, the term "approximately semicircular" may also refer to a shape obtained by cutting out an approximately circle over an angle range of 150 degrees, a shape obtained by cutting out an approximately circle over an angle range of 210 degrees, or a shape obtained by cutting out an arbitrary angle range between 150 degrees and 210 degrees.

[0018] The radius of protective portion 52 is set to a dimension that, in plan view, allows the user's hand (for example, the back of the hand) gripping grip portion 42 to overlap protective portion 52 without protruding beyond it (fits within the outline in plan view). Specifically, the radius of protective portion 52 is preferably in the range of 50 to 80 mm, and more preferably in the range of 55 to 70 mm. However, the specific dimension is not particularly limited.

[0019] Furthermore, in a plan view, the outline of the protective portion 52 is substantially symmetrical with respect to a straight line L1 in the left-right direction that passes through the center of the mounting portion 53. Furthermore, in a plan view, a portion of the outline of the protective portion 52 (a line extending along the radial direction) overlaps with a straight line L2 in the front-rear direction that passes through the center of the mounting portion 53. However, the portion of the outline of the protective portion 52 (a line extending along the radial direction) does not necessarily need to overlap with the straight line L2, and may be offset to the right or left while being parallel to the straight line L2. Furthermore, even when the substantially circular outline of the protective portion 52 has a shape that is notched at an angle other than 180 degrees, it is preferable that the outline of the protective portion 52 be substantially symmetrical with respect to a straight line L1 in the left-right direction that passes through the center of the mounting portion 53.

[0020] On the other hand, the outline of the protective portion 52 is asymmetrical with respect to a straight line L2 in the front-to-rear direction passing through the center of the mounting portion 53 in a plan view. The protective portion 52 protrudes a smaller amount from the outer peripheral surface of the grip portion 42 (or the inner peripheral surface of the mounting portion 53) toward the left side (inside the bogie main body 20) along the straight line L1 than a smaller amount of protrusion D1 from the outer peripheral surface of the grip portion 42 (or the inner peripheral surface of the mounting portion 53) toward the right side (outside the bogie main body 20) along the straight line L1. Also, the protective portion 52 protrudes a smaller amount from the outer peripheral surface of the grip portion 42 toward the left side along the straight line L3 or L4 than a smaller amount of protrusion from the outer peripheral surface of the grip portion 42 toward the right side along the straight line L3 or L4 inclined at an angle of 45 degrees or -45 degrees (positive angles clockwise) with respect to the straight line L1. Also, in a plan view, the protective portion 52 has a smaller area on the left side than on the right side, with the straight line L2 as the boundary. In this embodiment, when viewed in a plane, only the mounting portion 53 is arranged on the left side of the straight line L2, and the protective portion 52 is not arranged, so the protrusion amount on the left side of the protective portion 52 is 0 and the area on the left side is 0.

[0021] Furthermore, the protective part 52 has a certain thickness. Specifically, the vertical dimension of the protective part 52 is preferably in the range of 5 to 30 mm, and more preferably in the range of 10 to 20 mm. However, the specific dimension is not particularly limited.

[0022] The mounting portion 53 is cylindrical and extends integrally from the lower end and left end of the protective portion 52, and has an outer diameter larger than that of the main body member 41. The vertical dimension of the mounting portion 53 is not particularly limited, but is set to a length that allows the mounting portion 53 to be fixed to the main body member 41 with bolts, rivets, etc.

[0023] The mounting hole 54 is a hole into which the main body member 41 can be inserted. The inner diameter of the mounting hole 54 is set in accordance with the outer shape of the main body member 41. Therefore, the protective member 51 can be fixed to the main body member 41 by inserting the main body member 41 into the mounting hole 54 and fixing the mounting portion 53 to the main body member 41 at a predetermined position from the upper end of the main body member 41 with a bolt, rivet, or the like. The mounting portion 53 of this embodiment has insertion holes 55 at two locations on either side of the center of the mounting portion 53 in a plan view, into which a bolt, rivet, or the like can be inserted. While the protective member 51 of the push member 40A has been described above, the protective member 51 of the push member 40B has a configuration that is approximately symmetrical with respect to the center line C1 of the cart body 20 shown in Fig. 4(a). Also, the protective members 51 of the push members 40C and 40D have shapes that are approximately symmetrical with respect to the center line C2 of the cart body 20 with respect to the protective members 51 of the push members 40A and 40B, respectively.

[0024] The reinforcing member 60 is fixed to the lower end of the main body member 41, specifically at a position close to the lower end, with bolts, rivets, etc. The reinforcing member 60 not only reinforces the strength of the main body member 41 but also suppresses rattle between the main body member 41 and the insertion hole 23 when the main body member 41 is inserted into the insertion hole 23 of the corner member 22. The reinforcing member 60 is made of, for example, an aluminum alloy. Fig. 6(a) is a diagram showing an example of a reinforcing member 60, and is a cross-sectional view taken along line II shown in Fig. 5. Fig. 6(b) is a diagram showing an example of an insertion hole 23 of a corner member 22.

[0025] As shown in FIG. 6(a), the reinforcing member 60 is substantially cylindrical and has an outer diameter larger than that of the main body member 41. The reinforcing member 60 has multiple (here, two) bulging portions 61a, 61b, which are portions of the outer peripheral surface that bulge radially. The bulging portions 61a, 61b protrude radially via gentle slopes 62. The reinforcing member 60 has mounting holes 63 that open at the top and bottom to allow the main body member 41 to be inserted therein. Therefore, the reinforcing member 60 can be fixed to the main body member 41 by inserting the main body member 41 into the mounting holes 63 and fixing the reinforcing member 60 to the main body member 41 at a predetermined position from the bottom end of the main body member 41 with bolts, rivets, or the like. 5, the lower end of the reinforcing member 60 has a tapered shape with an outer diameter that decreases toward the bottom. The vertical dimension of the reinforcing member 60 is not particularly limited, but is set to a length that is approximately the same as the depth of the insertion hole 23 of the corner member 22.

[0026] As shown in FIG. 6(b), the insertion hole 23 of the corner member 22, into which the reinforcing member 60 is inserted, is surrounded by flat surfaces 75a, 75b, and 75c and an arcuate surface 75d having a radius of curvature substantially identical to the radius of curvature of the circle of the reinforcing member 60. The insertion hole 23 also has spaces 76a and 76b as recesses that allow the insertion of the bulging portions 61a and 61b of the reinforcing member 60. Therefore, the hand push member 40 is positioned at a predetermined position by inserting the reinforcing member 60 fixed to the main body member 41 into the insertion hole 23 with the bulging portions 61a and 61b aligned with the spaces 76a and 76b. In this way, the reinforcing member 60 functions as a positioning member. The shape of the insertion hole 23 shown in Figure 6(b) is approximately symmetrical with respect to a line Lh that is inclined at an angle of 45 degrees from a line in the front-to-rear direction (or a line in the left-to-right direction) that passes through the center of the insertion hole 23 in a plan view. The shape of the reinforcing member 60 is also approximately symmetrical with respect to the line Lh that passes through the center of the main body member 41 in a plan view. Therefore, the reinforcing member 60 can be inserted into the insertion hole 23 even when the push member 40 is rotated 180 degrees around an axis along the longitudinal direction of the main body member 41. The corner members 22 are arranged so that the arc surfaces 75d of the insertion holes 23 at each of the four corners are located closer to the outside of the cart main body 20.

[0027] Next, returning to FIG. 1, the hand push members 40A to 40D will be further described. For push members 40A and 40C, protective members 51 are attached to main body member 41 so that protective portion 52 is located on the right side. Furthermore, reinforcing members 60 are attached to main body member 41 so that push members 40A and 40C are positioned on corner member 22 with protective portion 52 located on the right side. Here, push members 40A and 40C have reinforcing members 60 attached in different directions relative to main body member 41, specifically at 90 degrees to each other. On the other hand, for push members 40B and 40D, protective members 51 are attached to main body member 41 so that protective portion 52 is located on the left side. Also, for push members 40B and 40D, reinforcing members 60 are attached to main body member 41 so that they are positioned on corner member 22 with protective portion 52 located on the left side. Here, push members 40B and 40D have reinforcing members 60 attached in different directions relative to main body member 41, specifically at 90 degrees to each other. As a result, push members 40A and 40D located at diagonal corners have substantially the same configuration, and push members 40B and 40C located at diagonal corners have substantially the same configuration. However, the shapes of reinforcing member 60 and insertion holes 23 of corner member 22 may be changed so that all of push members 40A to 40D have substantially the same configuration while maintaining the orientation of protective portion 52 shown in Figure 1.

[0028] The user can attach the push members 40A to 40D to the cart main body 20 by inserting the push members 40A to 40D into the insertion holes 23 of the corner members 22. The user can move the transport cart 1 by holding the grip parts 42 of the push members 40A to 40D with their hands. Here, it is assumed that a user is pushing the transport cart 1 while grasping the grip portions 42 of the push members 40A and 40B with each hand (gripping state) in order to move the transport cart 1. When viewed from above, the user grips the transport cart 1 so that the back of the hand is closer to the outside of the cart main body 20 and the thumb is closer to the inside of the cart main body 20. The protective portion 52 of the protective member 51 protrudes outward from the cart main body 20 beyond the outer circumferential surface of the grip portion 42, and in a plan view, the hand (e.g., the back of the hand) of the user gripping the grip portion 42 overlaps the protective portion 52. Therefore, when the upper end portions of the push members 40A and 40B approach a wall or object, the protective portion 52 comes into contact with the wall or object before the hand does, thereby preventing or suppressing the hand of the user gripping the grip portion 42 from coming into contact with the wall or object. Note that, as shown in the enlarged view of FIG. 4(b), points P1, P3, and P4, where the outline of the protective portion 52 of the protective member 51 of the push member 40A intersects with the lines L1, L3, and L4, respectively, do not overlap the cart main body 20 and are located outside the cart main body 20. Furthermore, even when a user grasps and pushes the grip portions 42 of the hand push members 40C and 40D with their hands, the user's hands grasping the grip portions 42 are similarly prevented or inhibited from coming into contact with a wall or object.

[0029] Next, let us consider a case where a user loads and unloads an object onto the cart body 20. Here, the protective portion 52 of the protective member 51 has a shape that suppresses interference with the transported object when loading or unloading the transported object onto or from the cart main body 20, and in this embodiment, it has a substantially semicircular shape with a portion of the substantially circular shape cut out. The cut-out portion overlaps with the cart main body 20 in a plan view. Furthermore, the protective portion 52 protrudes less from the outer circumferential surface of the grip portion 42 toward the inside of the cart main body 20 than the amount that the protective portion 52 protrudes from the outer circumferential surface of the grip portion 42 toward the outside of the cart main body 20. Therefore, in a plan view, the overlap of the protective portion 52 with the cart main body 20 can be reduced. Therefore, interference with the protective portion 52 can be suppressed when a user loads or unloads transported objects onto or from the cart main body 20, making it easy to load or unload the transported objects. Moreover, the outline of the protective portion 52 is, in a plan view, substantially symmetrical with respect to a line L1 in the left-right direction that passes through the center of the attachment portion 53. Therefore, the protective member 51 can be made common to the hand push members 40A to 40D.

[0030] (First Modification) Next, a modification of the first embodiment (first modification) will be described with reference to FIG. The transport cart 2 of this modified example has four push members 80 (80A to 80D). Fig. 8(a) is a plan view showing an example of a transport cart 2 according to a first modified example. Fig. 8(b) is an enlarged view of the periphery of the push member 80A shown in Fig. 8(a). Fig. 8(c) is a perspective view showing an example of a protective member 81. Note that the same components as those of the transport cart 1 described in the first embodiment are given the same reference numerals and will not be described again.

[0031] Each of the push members 80A to 80D has a protection member 81. Here, the protective member 81 of the hand push member 80A will be described. The protective member 81 has a protective portion 82 and an attachment portion 83, which are integrally formed. The protective member 81 also has attachment holes 84 that open upward and downward to allow the main body member 41 to be inserted therein. In the protective member 81 of the first modification, the protective portion 82 has a shape different from that of the protective portion 52 of the first embodiment described above. Here, the differences between the protective portion 82 and the protective portion 52 will be mainly described.

[0032] In this modified example, the outer contour (or part of the outer contour) of the protective portion 82 in plan view is a shape in which a part of an approximately polygonal (approximately square) is cut out, in this case, a substantially rectangular shape. In Fig. 8(b), part of the cutout shape is indicated by a two-dot chain line. In plan view, the protective portion 82 has a shape in which a part of an approximately square centered on the center of the mounting portion 83 is cut out over a range of 180 degrees.

[0033] The front-rear dimension E1 and left-right dimension E2 of the protective portion 82 are set to dimensions such that, in a plan view, the user's hand gripping the grip portion 42 does not overlap or extend beyond the protective portion 82. Specifically, the front-rear dimension E1 of the protective portion 82 is preferably in the range of 100 to 160 mm, and more preferably in the range of 110 to 140 mm. The left-right dimension E2 of the protective portion 52 is preferably in the range of 50 to 80 mm, and more preferably in the range of 55 to 70 mm. However, the specific dimensions are not particularly limited.

[0034] In addition, in a plan view, the outline of the protective portion 82 is substantially symmetrical with respect to a line L1 in the left-right direction that passes through the center of the mounting portion 83. In addition, a part of the outline of the protective portion 82 (a line along the radial direction) overlaps with a line L2 in the front-rear direction that passes through the center of the mounting portion 83. While the protective member 81 of the push member 80A has been described above, the protective member 81 of the push member 80B has a configuration that is approximately symmetrical with respect to the center line C1 of the cart body 20 shown in Figure 8(a). Also, the protective members 81 of the push members 80C and 80D have shapes that are approximately symmetrical with respect to the protective members 81 of the push members 80A and 80B, respectively, with respect to the center line C2 of the cart body 20.

[0035] (Second Modification) Next, a modified example (second modified example) of the first embodiment will be described with reference to FIG. The transport cart 3 of this modified example has four push members 90 (90A to 90D). Fig. 9(a) is a plan view showing an example of a transport cart 3 according to a second modified example. Fig. 9(b) is an enlarged view of the periphery of the push member 90A shown in Fig. 9(a). Fig. 9(c) is a perspective view showing an example of a protective member 91. Note that the same components as those of the transport cart 1 described in the first embodiment are given the same reference numerals and will not be described again.

[0036] Each of the push members 90A to 90D has a protection member 91. Here, the protective member 91 of the hand push member 90A will be described. The protective member 91 has a protective portion 92 and an attachment portion 93, which are integrally formed. The protective member 91 also has attachment holes 94 that open upward and downward to allow the main body member 41 to be inserted therein. In the protective member 91 of the second modification, the protective portion 92 has a shape different from that of the protective portion 52 of the first embodiment described above. Here, the differences between the protective portion 92 and the protective portion 52 will be mainly described.

[0037] In this modified example, the outer contour (or a part of the outer contour) of the protective portion 92 in plan view is a shape obtained by cutting out a part of an approximate polygon (approximately a regular hexagon), in this case, an approximate trapezoid. In Fig. 8(b), part of the cutout shape is indicated by a two-dot chain line. In plan view, the protective portion 92 has a shape obtained by cutting out a part of an approximate regular hexagon centered on the center of the mounting portion 93 over a range of 180 degrees.

[0038] The base dimensions E3 and E4 of the protective portion 92 along the front-rear direction and the height dimension E5 along the horizontal direction are set to dimensions such that the user's hand gripping the grip portion 42 does not overlap the protective portion 92 and extend beyond the protective portion 92 in a plan view. Specifically, the front-rear dimension E3 of the protective portion 92 is preferably in the range of 50 to 80 mm, and more preferably in the range of 55 to 70 mm. The front-rear dimension E4 of the protective portion 92 is preferably in the range of 100 to 160 mm, and more preferably in the range of 110 to 140 mm. The height dimension E5 of the protective portion 92 is preferably in the range of 42.5 to 69.2 mm, and more preferably in the range of 47.5 to 60.5 mm. However, the specific dimensions are not particularly limited.

[0039] In addition, in a plan view, the outline of the protective portion 92 is substantially symmetrical with respect to a straight line L1 in the left-right direction that passes through the center of the mounting portion 83. In addition, in a plan view, a part of the outline of the protective portion 92 overlaps with a straight line L2 in the front-rear direction that passes through the center of the mounting portion 93. While the protective member 91 of the push member 90A has been described above, the protective member 91 of the push member 90B has a configuration that is approximately symmetrical with respect to the center line C1 of the cart body 20 shown in Figure 9(a). Also, the protective members 91 of the push members 90C and 90D have shapes that are approximately symmetrical with respect to the protective members 91 of the push members 90A and 90B, respectively, with respect to the center line C2 of the cart body 20.

[0040] <Second embodiment> Next, a transporter 4 according to a second embodiment will be described with reference to FIGS. Fig. 10 is a perspective view showing an example of the transporter cart 4 according to the second embodiment. Fig. 11(a) is a plan view showing an example of the transporter cart 4.

[0041] The transport cart 4 of this embodiment has four push members 100 (100A to 100D). When there is no need to distinguish between the push members 100A to 100D, they will be simply referred to as push members 100. The push member 100 has a main body member 41, a protective member 101, and a reinforcing member 60. Fig. 11(b) is an enlarged view of the periphery of the push member 100A shown in Fig. 11(a). Fig. 11(c) is a perspective view showing an example of the protection member 101.

[0042] The protective member 101 has a protective portion 102 and an attachment portion 103, which are integrally formed. The protective member 101 also has attachment holes 104 that open at the top and bottom to allow the main body member 41 to be inserted therein. The attachment portion 103 and the attachment hole 104 have the same configurations as the attachment portion 53 and the attachment hole 54 of the first embodiment, respectively.

[0043] In this embodiment, the protective part 102 has an outline (or a part of the outline) of a substantially circular shape in plan view, with a portion cut out. In FIG. 11(b), the cut-out portion of the substantially circular shape is indicated by a two-dot chain line. In plan view, the protective part 102 has an outline of a substantially circular shape with a portion cut out, with the center of the mounting part 103 (or the center of the main body member 41) as its approximate center. In this embodiment, the center of the mounting part 103 approximately coincides with the center of the main body member 41 and the center of the grip part 42. In FIG. 11(b), the protective portion 102 has a shape in which an approximately circular shape is cut out over a range of 90 degrees, but it may also have a shape in which an approximately circular shape is cut out over any angle range between 90 degrees and 135 degrees.

[0044] The radial dimension of the protective portion 102 can be set to the same radial dimension as that of the protective portion 52 of the first embodiment, but the specific dimension is not particularly limited. In addition, the outline of the protective portion 102 is generally symmetrical with respect to a line L3 inclined at a 45-degree angle from a line L1 in the left-right direction that passes through the center of the mounting portion 103 in a plan view. Furthermore, a portion of the outline of the protective portion 102 (a line extending in the radial direction) overlaps with a line L2 in the front-rear direction that passes through the center of the mounting portion 103 and the above-mentioned line L1 in a plan view. However, a portion of the outline of the protective portion 102 (a line extending in the radial direction) does not necessarily need to overlap with the line L1 and the line L2. It may be parallel to the line L1 and offset to the front or rear, or parallel to the line L2 and offset to the right or left. Even when the generally circular outline of the protective portion 102 is cut out at an angle other than 90 degrees, it is preferable that the outline of the protective portion 102 be generally symmetrical with respect to a line L3 inclined at a 45-degree angle from the line L1 in a plan view.

[0045] On the other hand, the outline of the protective part 102 is asymmetrical in plan view with respect to a straight line L2 in the front-to-rear direction that passes through the center of the mounting part 53. The protective part 102 protrudes less from the outer peripheral surface of the grip part 42 along the straight line L3 toward the left side (inside the bogie main body part 20) than it protrudes more from the outer peripheral surface of the grip part 42 toward the right side (outside the bogie main body part 20) along the straight line L1, the straight line L3, or the straight line L4. Also, in plan view, the area of ​​the protective part 102 is smaller on the left side than on the right side, with the straight line L2 as the boundary.

[0046] While the protective member 101 of the push member 100A has been described above, the protective member 101 of the push member 100B has a configuration that is approximately symmetrical with respect to the center line C1 of the cart body 20 shown in Figure 11(a). Also, the protective members 101 of the push members 100C and 100D have shapes that are approximately symmetrical with respect to the protective member 101 of the push members 100A and 100B, respectively, with respect to the center line C2 of the cart body 20.

[0047] A user can attach the push members 100A to 100D to the cart body 20 by inserting the push members 100A to 100D into the insertion holes 23 of the corner members 22, respectively. In a plan view, the protective portion 102 of the protective member 101 overlaps with the user's hand gripping the grip portion 42, thereby preventing or suppressing the user's hand gripping the grip portion 42 from coming into contact with a wall or object. The protective portion 102 of this embodiment protrudes from the outer circumferential surface of the grip portion 42 along a straight line L4 toward the outside of the cart body 20 on both sides (the right and left sides), further preventing or suppressing the user's hand from coming into contact with a wall or object.

[0048] Furthermore, the protective portion 102 of the protective member 101 has a shape that suppresses interference with transported objects when loading and unloading the transported objects onto and from the cart main body 20, and in this embodiment, has a shape that is approximately circular with a portion cut out. The cutout portion overlaps with the cart main body 20 in a plan view. Furthermore, the protective portion 102 protrudes less from the outer peripheral surface of the grip portion 42 toward the inside of the cart main body 20 along the line L3 than the amount that the protective portion 102 protrudes from the outer peripheral surface of the grip portion 42 toward the outside of the cart main body 20. Therefore, in a plan view, the overlap between the protective portion 102 and the cart main body 20 can be reduced. Therefore, interference with the protective portion 102 can be suppressed when a user loads and unloads transported objects onto and from the cart main body 20, making it easier to load and unload the transported objects. Moreover, the outline of the protection portion 102 is, in plan view, approximately symmetrical with respect to a line L3 that passes through the center of the attachment portion 103. Therefore, the protection member 101 can be made common to the hand push members 100A to 100D.

[0049] (Third Modification) Next, a modification (third modification) of the second embodiment will be described with reference to FIG. The transport cart 5 of this modified example has four push members 110 (110A to 110D). Fig. 12(a) is a plan view showing an example of a transport cart 5 according to a third modified example. Fig. 12(b) is an enlarged view of the periphery of the push member 110A shown in Fig. 12(a). Fig. 12(c) is a perspective view showing an example of a protective member 111. Note that the same components as those of the transport cart 1 described in the first embodiment are given the same reference numerals and will not be described again.

[0050] Each of the push members 110A to 110D has a protection member 111. Here, the protective member 111 of the hand-pushing member 110A will be described. The protective member 111 has a protective portion 112 and an attachment portion 113, which are integrally formed. The protective member 111 also has attachment holes 114 that open upward and downward to allow the main body member 41 to be inserted therein. In the protective member 111 of the third modified example, the protective portion 112 has a shape different from that of the protective portion 102 of the second embodiment described above. Here, the differences between the protective portion 112 and the protective portion 102 will be mainly described.

[0051] In this modified example, the outer shape (or part of the outer shape) of the protection portion 112 in plan view is a shape in which a part of an approximately polygonal (approximately square) is cut out, in this case, a roughly L-shape. In Fig. 12(b), part of the cutout shape is indicated by a two-dot chain line. In plan view, the protection portion 112 has a shape in which a roughly square with its center approximately at the center of the attachment portion 113 is cut out over a 45-degree range.

[0052] The front-rear dimension E6 and the left-right dimension E7 of the protective part 112 are set to dimensions such that, in a plan view, the user's hand gripping the grip part 42 does not overlap or extend beyond the protective part 112. Specifically, the front-rear dimension E6 and the left-right dimension E7 of the protective part 112 are preferably in the range of 100 to 160 mm, and more preferably in the range of 110 to 140 mm. However, the specific dimensions are not particularly limited.

[0053] In addition, the outline of the protection portion 112 is, in plan view, substantially symmetrical with respect to a line L3 that passes through the center of the attachment portion 113. In addition, in plan view, a part of the outline of the protection portion 112 overlaps with the lines L1 and L2 that pass through the center of the attachment portion 113. While the protective member 111 of the push member 110A has been described above, the protective member 111 of the push member 110B has a configuration that is approximately symmetrical with respect to the center line C1 of the cart body 20 shown in Figure 12(a). Also, the protective members 111 of the push members 110C and 110D have shapes that are approximately symmetrical with respect to the protective members 111 of the push members 110A and 110B, respectively, with respect to the center line C2 of the cart body 20.

[0054] <Third embodiment> Next, a transporting cart 6 according to a third embodiment will be described with reference to FIGS. Fig. 13 is a perspective view showing an example of a transporter cart 6 according to the third embodiment. Fig. 14(a) is a plan view showing an example of the transporter cart 6.

[0055] The transport cart 6 of this embodiment has four push members 120 (120A to 120D). When there is no need to distinguish between the push members 120A to 120D, they will be simply referred to as the push member 120. The push member 120 has a main body member 41, a protective member 121, and a reinforcing member 60. Fig. 14(b) is an enlarged view of the periphery of the push member 120A shown in Fig. 14(a). Fig. 14(c) is a perspective view showing an example of the protection member 121.

[0056] The protective member 121 has a protective portion 122 and an attachment portion 123, which are integrally formed. The protective member 121 also has attachment holes 124 that open at the top and bottom to allow the main body member 41 to be inserted therein. The attachment portion 123 and the attachment hole 124 have the same configurations as the attachment portion 53 and the attachment hole 54 of the first embodiment, respectively.

[0057] In this embodiment, the protective portion 122 has an outline (or a part of the outline) of a substantially circular shape in plan view, with a portion cut out. In FIG. 14(b), the cut-out portion of the circle is indicated by a two-dot chain line. In plan view, the protective portion 122 has an outline (or a part of the outline) of a substantially circular shape with a portion cut out, with the center of the mounting portion 123 (or the center of the main body member 41) as its approximate center. In this embodiment, the center of the mounting portion 123 approximately coincides with the center of the main body member 41 and the center of the grip portion 42. Furthermore, the protective portion 122 of this embodiment can hold the side wall 10. As shown in FIG. 13, the side wall 10 is a rectangular plate that covers the sides of the transport cart 6 from the front, back, left, and right. The side wall 10 is made of, for example, plastic cardboard. Plastic cardboard is a plate-shaped member made of plastic with a hollow area, and is lightweight and has excellent rigidity. However, the side wall 10 may also be made of wood plywood or veneer.

[0058] The protective part 122 has holding parts 125a and 125b that hold the side wall 10. As shown in FIG. 14(b), the holding parts 125a and 125b are positioned to overlap the carriage main body 20 and are formed at intervals of approximately 90° with the center of the mounting part 123 as the approximate center. Specifically, the holding part 125a is located at the front end of the protective part 122, and the holding part 125b is located at the left end of the protective part 122. The holding portions 125a, 125b have grooves 126a, 126b that are recessed from the outside toward the center of the protective portion 122, i.e., inward. The grooves 126a, 126b penetrate the protective portion 122 from top to bottom. The groove widths of the grooves 126a, 126b are set to dimensions that allow the side wall 10 to be fitted into them.

[0059] The radial dimension of the protective portion 122 can be set to the same radial dimension as that of the protective portion 52 of the first embodiment. In addition, the outline of the protection portion 122 is substantially symmetrical with respect to a line L3 that is inclined at an angle of 45 degrees from a line L1 that passes through the center of the attachment portion 123 in the left-right direction in a plan view. On the other hand, the outline of the protective portion 122 is asymmetrical with respect to a straight line L2 in the front-to-rear direction that passes through the center of the mounting portion 123 in a plan view. The protective portion 122 protrudes less from the outer peripheral surface of the grip portion 42 along the straight line L3 toward the left side (inside the bogie main body portion 20) than it protrudes from the outer peripheral surface of the grip portion 42 toward the right side (outside the bogie main body portion 20) along the straight line L1, the straight line L3, or the straight line L4. The straight line L4 is inclined at -45 degrees with respect to the straight line L1. Furthermore, in a plan view, the area of ​​the protective portion 122 is smaller on the left side than on the right side, with the straight line L2 as the boundary.

[0060] While the protective member 121 of the push member 120A has been described above, the protective member 121 of the push member 120B has a configuration that is approximately symmetrical with respect to the center line C1 of the cart main body 20 shown in Figure 14(a). Also, the protective members 121 of the push members 120C and 120D have shapes that are approximately symmetrical with respect to the protective members 121 of the push members 120A and 120B, respectively, with respect to the center line C2 of the cart main body 20.

[0061] A user can attach the push members 120A to 120D to the cart main body 20 by inserting the push members 120A to 120D into the insertion holes 23 of the corner members 22, respectively. In a plan view, the protective portion 122 of the protective member 121 overlaps with the user's hand gripping the grip portion 42, thereby preventing or suppressing the user's hand gripping the grip portion 42 from coming into contact with a wall or an object. The protective portion 122 of this embodiment protrudes from the outer circumferential surface of the grip portion 42 along a straight line L4 toward the outside of the cart main body 20 on both sides (the right and left sides), thereby further preventing or suppressing the user's hand from coming into contact with a wall or an object.

[0062] Furthermore, the protective portion 122 of the protective member 121 has a shape that suppresses interference with transported objects when loading and unloading the transported objects onto and from the cart main body 20, and in this embodiment, has a shape that is approximately circular with a portion cut out. The cutout portion overlaps with the cart main body 20 in a plan view. Furthermore, the protective portion 122 protrudes less from the outer peripheral surface of the grip portion 42 toward the inside of the cart main body 20 along the line L3 than the amount that the protective portion 122 protrudes from the outer peripheral surface of the grip portion 42 toward the outside of the cart main body 20. Therefore, in a plan view, the protective portion 122 can reduce overlap with the cart main body 20. Therefore, interference with the protective portion 122 can be suppressed when a user loads and unloads transported objects onto and from the cart main body 20, making it easier to load and unload the transported objects. Furthermore, since the protective portion 122 has holding portions 125a and 126b, it can hold the side wall 10. Note that the push member 120 may be equipped with a holding member other than the protective member 121 in order to hold the side wall 10 at a position below the main body member 41. Furthermore, the push member 120 may be equipped with two or more protective members 121 attached to one main body member 41, spaced apart from each other in the vertical direction. Furthermore, the outline of the protection portion 122 is, in plan view, approximately symmetrical with respect to a line L3 in the left-right direction that passes through the center of the attachment portion 123. Therefore, the protection member 121 can be made common to the hand push members 120A to 120D.

[0063] <Fourth embodiment> Next, a transporter 7 according to a fourth embodiment will be described with reference to FIGS. Fig. 15 is a perspective view showing an example of a transporter cart 7 according to the fourth embodiment. Fig. 16(a) is a plan view showing an example of the transporter cart 7.

[0064] The transport cart 7 of this embodiment has four push members 130 (130A to 130D). When there is no need to distinguish between the push members 130A to 130D, they will be simply referred to as push members 130. The push members 130 have a main body member 41, a protective member 131, and a reinforcing member 60. Fig. 16(b) is an enlarged view of the periphery of the push member 130A shown in Fig. 16(a). Fig. 16(c) is a perspective view showing an example of the protection member 131.

[0065] The protective member 131 has a protective portion 132 and an attachment portion 133, which are integrally formed. The protective member 131 also has attachment holes 134 that open at the top and bottom to allow the main body member 41 to be inserted therein. The attachment portion 133 and the attachment hole 134 have the same configurations as the attachment portion 53 and the attachment hole 54 of the first embodiment, respectively.

[0066] The protective portion 132 has a shape that prevents interference with transported objects when the push member 130 is attached to the cart body 20 and the transported objects are loaded onto and unloaded from the cart body 20 . In this embodiment, the protective part 132 has an outline that is a substantially polygonal (substantially square) shape in plan view. In plan view, the protective part 132 has a substantially square shape with its center approximately at the center of the attachment part 133 (or the center of the main body member 41). In addition, each side of the substantially square protective part 132 is parallel to the front-rear direction or the left-right direction. In this embodiment, the center of the attachment part 133 approximately coincides with the center of the main body member 41 and the center of the grip part 42.

[0067] The front-rear dimension E8 and the left-right dimension E9 of the protective portion 132 are set to dimensions such that, in a plan view, the user's hand gripping the grip portion 42 does not overlap or extend beyond the protective portion 132. Specifically, the front-rear dimensions E8 and E9 of the protective portion 52 are preferably in the range of 100 to 160 mm, and more preferably in the range of 110 to 140 mm. However, the specific dimensions are not particularly limited.

[0068] In addition, in a plan view, the outline of the protective portion 132 is approximately symmetrical with respect to a line L1 in the left-right direction that passes through the center of the mounting portion 133, and is approximately symmetrical with respect to a line L2 in the left-right direction that passes through the center of the mounting portion 133. In addition, in a plan view, the outline of the protective portion 132 is approximately symmetrical with respect to a line L3 that passes through the center of the mounting portion 133, and is approximately symmetrical with respect to a line L4 that passes through the center of the mounting portion 133. In addition, a portion of the outline of the protective portion 132 does not overlap with the bogie main body portion 20, and the remainder overlaps with the bogie main body portion 20.

[0069] While the protective member 131 of the push member 130A has been described above, the protective member 131 of the push member 130B has a configuration that is approximately symmetrical with respect to the center line C1 of the cart main body 20 shown in Figure 16(a). Also, the protective members 131 of the push members 130C and 130D have shapes that are approximately symmetrical with respect to the protective members 131 of the push members 130A and 130B, respectively, with respect to the center line C2 of the cart main body 20.

[0070] A user can attach the push members 130A to 130D to the cart main body 20 by inserting the push members 130A to 130D into the insertion holes 23 of the corner members 22, respectively. In a plan view, the protective portion 132 of the protective member 131 overlaps with the user's hand gripping the grip portion 42, thereby preventing or suppressing the user's hand gripping the grip portion 42 from coming into contact with a wall or object. In this embodiment, the protective portion 132 protrudes from the entire outer periphery of the grip portion 42 toward the outside of the cart main body 20, further preventing or suppressing the user's hand from coming into contact with a wall or object.

[0071] Furthermore, the protective portion 132 of the protective member 131 has a shape, which in this embodiment is a substantially square, that suppresses interference with the transported object when the transported object is loaded onto or unloaded from the cart main body 20. Compared to the case where the protective portion is a substantially circular shape as shown by the two-dot chain line in Fig. 16(b), making the protective portion 132 a substantially square reduces overlap with the cart main body 20. Therefore, when a user loads or unloads a transported object onto or unloads the cart main body 20, interference with the protective portion 132 can be suppressed, making it easier to load or unload the transported object.

[0072] In this embodiment, the approximate polygon is described as being an approximate square, but the present invention is not limited to this and may be another approximate polygon. In the case of an approximate polygon, it is preferable that the approximate polygon be an approximate regular polygon such as an approximate regular triangle, an approximate regular pentagon, an approximate regular hexagon, an approximate regular heptagon, or an approximate regular octagon. In addition, in this embodiment, the protective portion 132 is an approximately square with each side parallel to the front-to-back or left-to-right direction, but this is not limited to this case, and for example, it may be rotated at an angle of 45 degrees around the center of the mounting portion 133.

[0073] <Fifth embodiment> Next, a transporter 8 according to a fifth embodiment will be described with reference to FIGS. Fig. 17 is a perspective view showing an example of a transporter cart 8 according to the fifth embodiment. Fig. 18(a) is a plan view showing an example of the transporter cart 8.

[0074] The transport cart 8 of this embodiment has four push members 140 (140A to 140D). In addition, when there is no need to distinguish between the push members 140A to 140D, they will be simply referred to as the push member 140. The push member 140 has a main body member 41, a protective member 141, and a reinforcing member 60. Fig. 18(b) is an enlarged view of the periphery of the push member 140A shown in Fig. 18(a). Fig. 18(c) is a perspective view showing an example of the protection member 141.

[0075] The protective member 141 has a protective portion 142 and an attachment portion 143, which are integrally formed. The protective member 141 also has attachment holes 144 that open at the top and bottom to allow the main body member 41 to be inserted therein. The attachment portion 143 and the attachment hole 144 have the same configurations as the attachment portion 53 and the attachment hole 54 of the first embodiment, respectively.

[0076] The protective portion 142 has a shape that prevents interference with transported objects when the push member 140 is attached to the cart body 20 and the transported objects are loaded onto and unloaded from the cart body 20 . In this embodiment, the outer contour of the protective portion 142 is formed in a gently uneven (wavy) shape around the entire circumference (or a portion) of a substantially circular shape in plan view. The protective portion 142 has a shape that expands from the center of the attachment portion 143 (or the center of the main body member 41) in plan view. In this embodiment, the center of the attachment portion 143 substantially coincides with the center of the main body member 41 and the center of the grip portion 42.

[0077] The radius of the circle (see the two-dot chain line in FIG. 18(b)) formed by connecting the tips of adjacent convex portions of the concave and convex portions of the protective portion 142 in an arc shape can be set to the same radius as the protective portion 52 of the first embodiment. However, the specific dimension is not particularly limited.

[0078] In addition, in a plan view, the outline of the protective portion 142 is approximately symmetrical with respect to a line L1 in the left-right direction that passes through the center of the mounting portion 143, and is approximately symmetrical with respect to a line L2 in the left-right direction that passes through the center of the mounting portion 143. In addition, in a plan view, the outline of the protective portion 142 is approximately symmetrical with respect to a line L3 that passes through the center of the mounting portion 143, and is approximately symmetrical with respect to a line L4 that passes through the center of the mounting portion 143. In addition, a portion of the outline of the protective portion 142 does not overlap with the bogie main body portion 20, and the remainder overlaps with the bogie main body portion 20.

[0079] While the protective member 141 of the push member 140A has been described above, the protective member 141 of the push member 140B has a configuration that is approximately symmetrical with respect to the center line C1 of the cart main body 20 shown in Figure 18(a). Also, the protective members 141 of the push members 140C and 140D have shapes that are approximately symmetrical with respect to the protective members 141 of the push members 140A and 140B, respectively, with respect to the center line C2 of the cart main body 20.

[0080] A user can attach the push members 140A to 140D to the cart main body 20 by inserting the push members 140A to 140D into the insertion holes 23 of the corner members 22, respectively. In a plan view, the protective portion 142 of the protective member 141 overlaps with the user's hand gripping the grip portion 42, thereby preventing or suppressing the user's hand gripping the grip portion 42 from coming into contact with a wall or object. In this embodiment, the protective portion 142 protrudes from the entire outer periphery of the grip portion 42 toward the outside of the cart main body 20, further preventing or suppressing the user's hand from coming into contact with a wall or object.

[0081] Furthermore, the protective portion 142 of the protective member 141 has a shape, and in this embodiment, an uneven outline, that suppresses interference with the transported object when the transported object is loaded onto or unloaded from the cart main body 20. Compared to the case where the protective portion is a substantially circular shape as shown by the two-dot chain line in Fig. 18(b), the uneven outline of the protective portion 142 can reduce overlap with the cart main body 20. Therefore, interference with the protective portion 142 can be suppressed when the user loads or unloads the transported object onto or unloads the cart main body 20, making it easier to load or unload the transported object.

[0082] In this embodiment, the case has been described where the outer contour of the protective part 142 has a gently uneven (wavy) shape around the entire circumference of an approximately circular shape when viewed in a plane, but this is not limited to this case, and for example, the part that overlaps with the bogie main body part 20 may have an uneven shape.

[0083] Sixth Embodiment Next, a transporter 9 according to a sixth embodiment will be described with reference to FIGS. Fig. 19 is a perspective view showing an example of a transporter carriage 9 according to the sixth embodiment. Fig. 20(a) is a plan view showing an example of the transporter carriage 9.

[0084] The transport cart 9 of this embodiment has four push members 150 (150A to 150D). When there is no need to distinguish between the push members 150A to 150D, they will be simply referred to as push members 150. The push member 150 has a main body member 41, a protective member 151, and a reinforcing member 60. Fig. 20(b) is an enlarged view of the periphery of the push member 150A shown in Fig. 20(a). Fig. 20(c) is a perspective view showing an example of the protection member 151.

[0085] Protective member 151 has protective portion 152 and mounting portion 153, which are integrally formed. Protective member 151 also has mounting holes 154 that open at the top and bottom to allow main body member 41 to be inserted therein. Mounting portion 153 and mounting hole 154 have the same configurations as mounting portion 53 and mounting hole 54 of the first embodiment, respectively.

[0086] The protective portion 152 has a shape that prevents interference with transported objects when the push member 150 is attached to the cart body 20 and the transported objects are loaded onto and unloaded from the cart body 20 . In this embodiment, the outer shape of the protective portion 152 is substantially circular, specifically substantially elliptical, in plan view. The protective portion 152 has a substantially elliptical shape with the center of the attachment portion 153 (or the center of the main body member 41) as its center in plan view. In this embodiment, the center of the attachment portion 153 substantially coincides with the center of the main body member 41 and the center of the grip portion 42.

[0087] The length can be set to half the major axis dimension of the approximately elliptical shape of the protection portion 152, similar to the radius dimension of the protection portion 52 of the first embodiment. The ratio of the major axis dimension to the minor axis dimension can be set to be greater than 1 / 1 and smaller than 3 / 1. However, the specific dimensions are not particularly limited. In addition, in a plan view, the outline of the protective portion 152 is approximately symmetrical with respect to a line L1 in the left-right direction that passes through the center of the mounting portion 153, and is approximately symmetrical with respect to a line L2 in the left-right direction that passes through the center of the mounting portion 153. Furthermore, a portion of the outline of the protective portion 152 does not overlap with the bogie main body portion 20, and the remainder overlaps with the bogie main body portion 20.

[0088] While the protective member 151 of the push member 150A has been described above, the protective member 151 of the push member 150B has a configuration that is approximately symmetrical with respect to the center line C1 of the cart body 20 shown in Figure 20(a). Also, the protective members 151 of the push members 150C and 150D have shapes that are approximately symmetrical with respect to the protective members 151 of the push members 150A and 150B, respectively, with respect to the center line C2 of the cart body 20.

[0089] A user can attach the push members 150A to 150D to the cart main body 20 by inserting the push members 150A to 150D into the insertion holes 23 of the corner members 22, respectively. In a plan view, the protective portion 152 of the protective member 151 overlaps with the user's hand gripping the grip portion 42, thereby preventing or suppressing the user's hand gripping the grip portion 42 from coming into contact with a wall or an object. In this embodiment, the protective portion 152 protrudes from the entire outer periphery of the grip portion 42 toward the outside of the cart main body 20, further preventing or suppressing the user's hand from coming into contact with a wall or an object.

[0090] Furthermore, the protective portion 152 of the protective member 151 has a shape, which in this embodiment is a substantially ellipse, that suppresses interference with the transported object when the transported object is loaded onto or unloaded from the cart main body 20. By making the outline of the protective portion 152 a substantially ellipse, it is possible to reduce overlap with the cart main body 20 compared to when the protective portion is a substantially perfect circle as shown by the two-dot chain line in Fig. 20(b). Therefore, interference with the protective portion 152 can be suppressed when the user loads or unloads the transported object onto or unloads the cart main body 20, making it easier to load or unload the transported object.

[0091] In this embodiment, the term "approximately ellipse" is not limited to a shape that is a locus of points where the sum of the distances from two fixed points on a plane is constant, but also includes a shape that resembles a squashed circle. Furthermore, in this embodiment, the case where the major axis direction of the approximately ellipse is parallel to the straight line L1 has been described, but the present invention is not limited to this case, and the major axis direction of the approximately ellipse may be parallel to the straight line L2.

[0092] Seventh Embodiment Next, a push member 160 (160A to 160D) according to a seventh embodiment will be described with reference to Fig. 21. Here, only the push member 160A will be described. FIG. 21 is an exploded perspective view showing an example of the push member 160A. The push member 160A has a main body member 41, a protective member 161, and a reinforcing member 60. The main body member 41 and the reinforcing member 60 have the same configurations as the main body member 41 and the reinforcing member 60 of the first embodiment, respectively. The protective member 161 has a first protective portion 162, a second protective portion 163, and a grip portion 164, which are integrally formed. The protective member 161 also has an attachment hole 165 formed therein that opens downward (on the opposite side from the second protective portion 163 in the up-down direction) and into which the upper end of the main body member 41 can be inserted.

[0093] Grip portion 164 is substantially cylindrical and has dimensions that allow a user to hold it with one hand. To allow a user to hold it with one hand, the vertical dimension is preferably in the range of 100 to 200 mm, and more preferably in the range of 120 to 180 mm. The surface of grip portion 164 may also be provided with an uneven pattern to prevent slipping. Grip portion 164 has insertion holes 166 into which bolts, rivets, etc. can be inserted.

[0094] The first protective portion 162 and the second protective portion 163 are provided in the vicinity of the grip portion 164. Specifically, the first protective portion 162 is provided at one end (lower side) of the grip portion 164 in the vertical direction (axial direction of the main body member 41), and the second protective portion 163 is provided at the other end (upper side) of the grip portion 164 in the vertical direction. The first protective portion 162 and the second protective portion 163 have substantially the same shape in a plan view and overlap each other. Specifically, the first protective portion 162 and the second protective portion 163 have substantially the same shape as the protective portion 52 of the first embodiment. The mounting hole 165 is a hole (recess) into which the main body member 41 can be inserted, and is open on the lower side (first protective portion 162 side). The inner diameter of the mounting hole 165 is set to a size that allows the outer diameter of the main body member 41 to be inserted. The depth of the mounting hole 165 is not particularly limited, but is set to a depth that will prevent it from coming off when a lateral force is applied during use.

[0095] The protective member 161 can be attached to the main body member 41 by inserting the upper end of the main body member 41 into the attachment hole 165 of the grip portion 164 until it abuts against the attachment hole 165. Furthermore, by inserting a bolt, a rivet, or the like into the insertion hole 166 while the protective member 161 is attached to the main body member 41, the protective member 161 can be fixed to the main body member 41 so that it will not come off or rotate.

[0096] Although the protective member 161 of the push member 160A has been described here, the protective member 161 of the push member 160B has a configuration that is approximately symmetrical with respect to the center line C1 of the cart main body 20. The protective members 161 of the push members 160C and 160D have shapes that are approximately symmetrical with respect to the protective members 161 of the push members 160A and 160B, respectively, with respect to the center line C2 of the cart main body 20. A user can attach the push members 150A to 150D to the cart main body 20 by inserting the push members 150A to 150D into the insertion holes 23 of the corner members 22, respectively.

[0097] According to this embodiment, in addition to the effects of the first embodiment described above, the grip portion 164 can be made of a member different from the main body member 41. Furthermore, first protective portion 162 and second protective portion 163 are provided above and below grip portion 164, which further prevents or suppresses the user's hand from coming into contact with a wall or an object. In this embodiment, the first protective portion 162 and the second protective portion 163 have been described as having substantially the same shape as the protective portion 52 of the first embodiment, but this is not limited to this case, and the protective portion may have substantially the same shape as the protective portion of each of the above-mentioned embodiments or modified examples.

[0098] (Fourth Modification) Next, a modification (fourth modification) of the seventh embodiment will be described with reference to Fig. 22(a). Here, only the push member 170A will be described. FIG. 22(a) is an exploded perspective view showing an example of the push member 170A. The push member 170A has a main body member 41, a protective member 171, and a reinforcing member 60. The main body member 41 and the reinforcing member 60 have the same configurations as the main body member 41 and the reinforcing member 60 of the first embodiment, respectively.

[0099] The protective member 171 has a first protective portion 162 and a grip portion 164, which are integrally formed. The protective member 171 also has an attachment hole 165 formed therein. The protective member 171 of this modified example has a shape similar to that of the protective member 161 of the seventh embodiment, with the second protective portion 163 removed. The first protective portion 162 is not limited to having substantially the same shape as the protective portion 52 of the first embodiment, but may have substantially the same shape as the protective portion of each of the above-described embodiments or modifications.

[0100] (Fifth Modification) Next, a modification (fifth modification) of the seventh embodiment will be described with reference to Fig. 22(b). Here, only the push member 180A will be described. FIG. 22(b) is an exploded perspective view showing an example of the push member 180A. The push member 180A has a main body member 41, a protective member 181, and a reinforcing member 60. The main body member 41 and the reinforcing member 60 have the same configurations as the main body member 41 and the reinforcing member 60 of the first embodiment, respectively.

[0101] Protective member 181 has second protective portion 163 and grip portion 164, which are integrally formed. Protective member 181 also has mounting holes 165 formed therein. Protective member 181 of this embodiment has a shape similar to that of protective member 161 of the seventh embodiment, with first protective portion 162 removed. The second protective portion 163 is not limited to having substantially the same shape as the protective portion 52 of the first embodiment, and may have substantially the same shape as the protective portion of each of the above-described embodiments or modifications.

[0102] Although each embodiment of the present invention has been described in detail above with reference to the drawings, the above-described embodiments and modifications are merely illustrative examples of how the present invention may be implemented. The technical scope of the present invention is not limited to the above-described embodiments, and various embodiments and modifications may be combined. Various modifications of the present invention are possible within the scope of the spirit of the present invention, and such modifications are also included within the technical scope of the present invention.

[0103] In the above-described embodiments and modifications, the straight line L3 or the straight line L4 is inclined at an angle of 45 degrees or -45 degrees with respect to the straight line L1, but this is not limiting. For example, the shape of each protective part may be modified so that the straight line L3 or the straight line L4 is applicable even if it is inclined at an angle of 50 degrees or -50 degrees with respect to the straight line L1. Furthermore, for example, the shape of each protective part may be modified so that the straight line L3 or the straight line L4 is applicable even if it is inclined at an angle of 40 degrees or -40 degrees with respect to the straight line L1.

[0104] Furthermore, in the first embodiment and the modified example described above, the shape is an approximately circular or approximately polygonal shape cut out over an angle range of 180 degrees, but it may also be a shape cut out over an angle range of 270 degrees. Furthermore, the protective portion of each of the above-described embodiments and modifications may be appropriately formed with rounded corners (R portions) so that the corners are not sharp when viewed from above. [Explanation of symbols]

[0105] 1 to 9: Transport cart 20: Cart body 30: Running part 40 (40A to 40D), 80 (80A to 80D), 90 (90A to 90D), 100 (100A to 100D), 110 (110A to 110D), 120 (120A to 120D), 130 (130A to 130D), 140 (140A to 140D), 150 (150A to 150D), 160 (160A), 170 (170A), 180 (180A): Hand push member 41: Main body member 42: Grip part 60: Reinforcement member

Claims

1. A hand push member that is detachably attached to a cart body of a transport cart, a grip portion that a user holds with their hand; a protective portion that protrudes outward from the outer circumferential surface of the grip portion to protect the hand that grips the grip portion, The protective part is A push member characterized in that the push member is shaped to suppress interference with the transported object when the transported object is loaded or unloaded onto the cart main body while the push member is attached to the cart main body.

2. The protective part is 2. The hand push member according to claim 1, wherein the hand push member has a substantially circular or polygonal shape with a part cut out when viewed from a direction along the longitudinal direction of the grip portion.

3. The protective part is A hand push member as described in claim 1 or 2, characterized in that when viewed from a direction along the longitudinal direction of the grip portion, a portion of an approximately circular or approximately polygonal shape is cut out over an angle range of 90 degrees or more and 270 degrees or less, with the center of the grip portion as the approximate center.

4. The protective part is 4. The hand push member according to claim 2 or 3, characterized in that, when viewed from a direction along the longitudinal direction of the grip portion, a portion of an approximately regular polygon is cut out with the center of the grip portion as the center.

5. The protective part is When the push member is attached to the cart body, in a plan view, 5. The hand push member according to claim 2, wherein the substantially circular or polygonal cutout portion overlaps the cart body portion.

6. The protective part is When the push member is attached to the cart body, in a plan view, A hand push member as described in any one of claims 2 to 4, characterized in that it has a shape of an approximately circular or polygonal shape with a portion cut out, the center of which is located at a position shifted inward from the center of the grip portion toward the inside of the trolley main body portion.

7. The protective part is 2. The hand push member according to claim 1, wherein the hand push member has a substantially polygonal or elliptical shape when viewed in a direction along the longitudinal direction of the grip portion.

8. The protective part is 2. The hand push member according to claim 1, wherein at least a part of the contour of the grip portion is uneven when viewed in a direction along the longitudinal direction of the grip portion.

9. The protective part is When the push member is attached to the cart body, in a plan view, 5. A hand push member according to claim 2, wherein a portion of the outline of the approximately circular or polygonal shape does not overlap with the trolley body, and the remainder overlaps with the trolley body.

10. The protective part is When the push member is attached to the cart body, in a plan view, A push member as described in any one of claims 1 to 9, characterized in that the amount of protrusion from the outer surface of the grip portion toward the inside of the trolley main body is smaller than the amount of protrusion from the outer surface of the grip portion toward the outside of the trolley main body.

11. The protective part is When the push member is attached to the cart body, in a plan view, A push member as described in claim 10, characterized in that the amount of protrusion from the outer surface of the grip portion toward the inside of the trolley main body is smaller than the amount of protrusion from the outer surface of the grip portion toward the outside of the trolley main body along a straight line inclined at 45 degrees or -45 degrees with respect to a straight line running in the left-right direction through the center of the grip portion.

12. The protective part When the push member is attached to the cart body, in a plan view, A push member as described in any one of claims 1 to 11, characterized in that the area inside the trolley main body is smaller than the area outside the trolley main body, with a straight line running in the front-to-back direction through the center of the grip portion as the boundary.

13. The protective part is When the push member is attached to the cart body, in a plan view, 13. The hand push member according to claim 1, wherein the hand push member is asymmetrical with respect to a straight line passing through the center of the grip portion along the front-rear direction.

14. The protective portion has an outline When the push member is attached to the cart body, in a plan view, 14. The hand push member according to claim 1, wherein the hand push member is substantially symmetrical with respect to a line passing through the center of the grip portion along the left-right direction.

15. The protective part is When the push member is attached to the cart body, in a plan view, A hand push member according to any one of claims 1 to 13, characterized in that it is approximately symmetrical with respect to a line inclined at an angle of 45 degrees from a line passing through the center of the grip portion along the left-right direction.

16. A protective member attached to a rod-shaped member detachably attached to a carriage body of a transport carriage, a grip portion that a user holds with their hand; a protective portion that protrudes outward from the outer circumferential surface of the grip portion to protect the hand that grips the grip portion, The protective part is A protective member characterized in that the rod-shaped member to which the protective member is attached is shaped to suppress interference with the transported object when the transported object is loaded or unloaded onto the trolley main body while attached to the trolley main body.

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