Hand member and protective member

Abstract

To prevent a user's hand gripping a grip part from contacting an object.SOLUTION: A hand member 40 is attached to a body 20 of a hand cart 1 in detachable manner, the hand member having a grip part 42 to be gripped by a user's hand, and protection parts 56a-56c that are disposed outside the grip part 42 and protect the hand gripping the grip part 42.SELECTED DRAWING: Figure 8

Description

[Technical field]

[0001] The present invention relates to a push member and a protective member. [Background technology]

[0002] Some transport carts used at construction sites and the like have a configuration in which single pipes can be inserted into the four corners of the body of the transport cart. For example, Patent Document 1 discloses a transport cart in which corner members into which single pipes can be inserted as push rods are provided at the four corners. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2010-159054 A Summary of the Invention [Problem to be solved by the invention]

[0004] An object of the present invention is to prevent a user's hand from touching an object or the like when gripping a grip portion. [Means for solving the problem]

[0005] The present invention is a hand push member that is removably attached to the cart body of a transport cart, and is characterized in that it has a grip portion that a user grasps with his or her hand, and a protective portion that is located on the outside of the grip portion and protects the hand grasping the grip portion. Effect of the Invention

[0006] According to the present invention, it is possible to prevent the hand of a user holding the grip portion from coming into contact with an object or the like. [Brief description of the drawings]

[0007] [Figure 1] FIG. 2 is a perspective view showing an example of a transportation cart according to the first embodiment. [Diagram 2]FIG. 2 is a plan view showing an example of a transport cart. [Diagram 3] FIG. [Figure 4] FIG. 4 is a side view of the transport cart from the left side. [Diagram 5] FIG. 2 is a diagram showing an example of a push member according to the first embodiment. [Figure 6] FIG. 2 is a diagram showing an example of a push member according to the first embodiment. [Figure 7] FIG. 4 is a diagram illustrating an example of a protective member. [Figure 8] FIG. 13 is a diagram showing a state in which the grip portion is grasped by hand. [Figure 9] FIG. 11 is a diagram showing an example of a push member according to the second embodiment. [Figure 10] 13A and 13B are diagrams illustrating an example of a protective member according to a third embodiment. [Figure 11] 13A and 13B are diagrams illustrating an example of a protective member according to a fourth embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0008] The push member and protective member according to the embodiment will be described below with reference to the drawings. For ease of explanation, the up-down direction of the push member and protective member shown in each of the following embodiments is based on the direction when the push member is attached to the dolly body. The front-to-rear direction of the transport dolly is the longitudinal direction of the transport dolly, and the left-to-right direction is the lateral direction of the transport dolly. However, the transport dolly 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 transport cart 1 according to the first embodiment. Fig. 2 is a plan view showing an example of the transport cart 1. Fig. 3 is a rear view of the transport cart 1 as viewed from the rear side. Fig. 4 is a side view of the transport cart 1 as viewed from the left side. 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 comprises a cart body 20, a running section 30, and a push member 40. The cart body 20 is configured by connecting a plurality of frame parts and the like, and is used to carry transported objects. The cart body 20 is substantially rectangular in shape with the longitudinal direction being the front-rear direction and the transverse direction being the short side direction in a plan view. The cart body 20 has a front frame part 21a, a rear frame part 21b, a right frame part 21c, a left frame part 21d, a corner member 22, a reinforcing frame part (reinforcing part) 25, a mounting part 26, and the like.

[0010] The front frame portion 21a, the rear frame portion 21b, the right frame portion 21c, and the left frame portion 21d may be, for example, hollow angular pipes made of an aluminum alloy. The corner member 22 is made of an aluminum alloy formed by extrusion molding, for example. The corner member 22 has an insertion hole 23 that opens upward and a stopper portion 24 (see FIG. 5) that closes a part of the lower portion. 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 four corners by corner members 22 to form a substantially rectangular frame frame on all four sides. Within the frame frame, a plurality of reinforcing frame portions 25 are butted together in the front-rear and left-right directions and are joined by screws, rivets, welding, etc. to form a lattice shape. The reinforcing frame portions 25 can be, for example, angular hollow pipes made of aluminum alloy or plates with uneven cross sections. The placement portion 26 is a flat plate for carrying objects to be transported, and is joined to each frame portion and each reinforcing frame portion 25 via rivets or screws.

[0012] The running part 30 runs on the running surface while supporting the load of the dolly body 20 and the transported object. The running part 30 has a plurality of casters 31, 32. In this embodiment, the running part 30 has six casters, four casters 31 arranged at the four corners of the dolly body 20 and two casters 32 arranged at the center in the front-rear direction and separated to the left and right. The casters 31, 32 have wheels 33 and fork members 34 that rotatably support the wheels 33. The casters 31, 32 are attached to the dolly body 20 via mounting plates. The casters 31, 32 can each rotate around a vertical axis. The four casters 31 are braked casters, and the two casters 32 are non-brake casters. The four braked casters 31 each have a brake pedal 35 that can swing up and down.

[0013] The push member 40 is a member for a user to push by hand when the transport cart 1 is traveling. The push member 40 is elongated in the vertical direction with a length of about 1000 mm. The push member 40 is attached to the cart body 20 by inserting the lower end into the insertion hole 23 of the corner member 22, and is detachable so that it can be removed from the cart body 20 by pulling out 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 each corner member 22. Here, the push member 40A is located on the right side and rear side, the push member 40B is located on the left side and rear side, the push member 40C is located on the right side and front side, and the push member 40D is located on the left side and front side. When it is not necessary to use the push members 40A to 40D separately, they will be simply described as push members 40. In addition, it is not necessary to attach all four push members 40A to 40D to the cart body 20. Only one, two or three push members 40 may be attached to the cart body 20. good.

[0014] 5 and 6 are diagrams showing an example of the push member 40. FIG. The push member 40 has a main body member 41 as a main body portion, a protective member 51, and a reinforcing member 71. The main body member 41 is a long pipe-like member or a rod-like member extending in the vertical direction. In order to reduce weight, the main body member 41 is made of, for example, an aluminum alloy and is formed by extrusion molding. The main body member 41 is a circular tube having an outer diameter D of, for example, 40 to 45 mm (approximately 42 mm in this example), which is an outer diameter that is easy for a user to grasp. The inside of the main body member 41 is reinforced 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 may be any of various rod-like members, tubular members, single pipes (JIS General structural carbon steel pipes specified in JIS G 3444 can be used.

[0015] The protective member 51 protects the hands of a user. The protective member 51 is attached to the upper side of the main body member 41, specifically, to the upper end portion by fixing with bolts, rivets, or the like. The protective member 51 of this embodiment will be described with reference to Figures 7 and 8. Figure 7(a) is a plan view of the protective member 51, Figure 7(b) is a side view of the protective member 51, and Figure 7(c) is a perspective view of the protective member 51. Figure 8(a) is a plan view showing a state in which the grip portion 42 of the hand pushing member 40 having the protective member 51 attached to the main body member 41 is gripped by a hand, and Figure 8(b) is a side view.

[0016] The protective member 51 has an upper mounting portion 52, a lower mounting portion 54, and a first protective portion 56a to a third protective portion 56c, which are integrally formed. The protective member 51 is made of a resin material such as polyethylene, and is integrally formed by injection molding. In order to improve visibility, the protective member 51 is given a color different from that of the dolly main body portion 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, when the front frame portion 21a, the rear frame portion 21b, the right frame portion 21c, and the left frame portion 21d are a metallic color such as silver, the protective member 51 may be a color different from the metallic color, for example, a primary color such as red, green, and blue, or may be orange, yellow, or the like. The protective member 51 is given a color different from that of the main body member 41. For example, if the main body member 41 is a metallic color such as silver, the color may be different from the metallic 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 upper mounting portion 52 is located at the upper end of the protective member 51. The upper mounting portion 52 is an example of an upper end portion. The upper mounting portion 52 is substantially disc-shaped or cylindrical in shape, with the central axis O being substantially the center. The central axis O is an axis line that is the center of the protective member 51 or the push member 40 in the vertical direction. The upper mounting portion 52 has an outer diameter D1 larger than the outer diameter D of the main body member 41 in a plan view. The outer diameter D1 of the upper mounting portion 52 is, for example, 41 mm to 80 mm (about 70 mm here). The upper mounting portion 52 has a thickness in the vertical direction of, for example, 10 mm to 30 mm (about 22 mm here). However, the specific dimensions are not particularly limited.

[0018] Moreover, the upper mounting portion 52 has an insertion hole 53 on its lower surface. The insertion hole 53 is formed in a concave shape extending from the lower surface of the mounting portion 52 toward the upper side. The insertion hole 53 has a size that allows the upper end of the main body member 41 to be inserted from below, and is set according to the outer diameter D of the main body member 41. The insertion hole 53 is an example of a positioning portion that fits into and positions the main body member 41. The upper mounting portion 52 does not necessarily have to have the insertion hole 53. Moreover, the upper mounting portion 52 is not limited to being disk-shaped or approximately cylindrical.

[0019] The lower mounting portion 54 is located at the lower end of the protective member 51. This is an example. The lower mounting portion 54 has a substantially disk-like or cylindrical shape substantially centered on the central axis O. The lower mounting portion 54 has an outer diameter D2 larger than the outer diameter D of the main body member 41 in a plan view. The outer diameter D2 of the lower mounting portion 54 is, for example, 41 mm to 80 mm (approximately 70 mm here). The lower mounting portion 54 has a thickness in the vertical direction of, for example, 10 mm to 30 mm (approximately 22 mm here). The outer diameter D2 of the lower mounting portion 54 is approximately the same as the outer diameter D1 of the upper mounting portion 52, and the thickness in the vertical direction of the lower mounting portion 54 is approximately the same as the thickness in the vertical direction of the lower mounting portion 54. However, the specific dimensions are not particularly limited.

[0020] The lower mounting portion 54 has a through hole 55 along the vertical direction. The through hole 55 is large enough to insert the main body member 41 in the vertical direction. The lower mounting portion 54 is not limited to a disk shape or a substantially cylindrical shape. The lower mounting portion 54 has a fixing hole 65 formed from the outer circumferential surface to the inner circumferential surface of the through hole 55. The protective member 51 can be attached to the main body member 41 by inserting the main body member 41 from the lower side into the through hole 55 and the insertion hole 53 and inserting a mounting member such as a bolt or a rivet into the fixing hole 65 to fix the main body member 41. When the protective member 51 is attached to the main body member 41, the central axis O of the protective member 51 and the central axis O of the main body member 41 approximately coincide with each other.

[0021] The vertical height L of the gap between the upper mounting part 52 and the lower mounting part 54 is large enough for an operator's hand to be inserted and is larger than the width of the palm from the index finger to the little finger. The vertical height L is, for example, 100 mm to 200 mm (approximately 150 mm in this case). When the protective member 51 is attached to the main body member 41, the area of ​​the main body member 41 between the upper mounting part 52 and the lower mounting part 54 forms the grip part 42 that the user grasps with his / her hand when traveling the transport cart 1. The grip part 42 is elongated in the vertical direction.

[0022] The first to third protective parts 56a to 56c are positioned outside the grip part 42 to protect the user's hand gripping the grip part 42. The first to third protective parts 56a to 56c of this embodiment all have the same shape. The first protective portion 56a to the third protective portion 56c are substantially bar-shaped with a rectangular cross section that connects the upper mounting portion 52 and the lower mounting portion 54. The first protective portion 56a to the third protective portion 56c extend downward from the upper mounting portion 52 so as to gradually move away from the central axis O, and then extend to the lower mounting portion 54 so as to gradually approach the central axis O. Specifically, as shown in FIG. 7(b), the first protective portion 56a to the third protective portion 56c are composed of an upper portion 57, a lower portion 58, and a central portion 59. The upper portion 57 extends obliquely downward from the outer peripheral surface of the upper mounting portion 52 and is connected to the central portion 59. The lower portion 58 extends obliquely upward from the outer peripheral surface of the lower mounting portion 54 and is connected to the central portion 59. The central portion 59 is aligned in the vertical direction, with the upper side connected to the upper portion 57 and the lower side connected to the lower portion 58. The central portion 59 is a main portion that protects the hand gripping the grip portion 42, and is an example of a protection main body portion. In addition, in a plan view as shown in Fig. 7(a), the first protection portion 56a to the third protection portion 56c have a width W along a direction perpendicular to a radial direction protruding from the central axis O, which is substantially constant for all of the upper portion 57, the lower portion 58, and the central portion 59. However, the width W of the upper portion 57, the lower portion 58, and the central portion 59 does not have to be substantially constant. For example, the width W of the upper portion 57 may be larger than that of the central portion 59 toward the upper side, and the width W of the lower portion 58 may be larger than that of the central portion 59 toward the lower side.

[0023] 8(a), in a state in which protective member 51 is attached to main body member 41, first protective portion 56a to third protective portion 56c have a distance S from the outer peripheral surface of grip portion 42 to the inner peripheral surface (the inner peripheral surface of central portion 59) of first protective portion 56a to third protective portion 56c, which is a length that enables an operator to grasp grip portion 42 and is greater than the thickness from the palm to the back of the hand. Distance S is, for example, 35 mm to 50 mm (approximately 38 mm in this case). In addition, the first protective portion 56a to the third protective portion 56c have a curved outer circumferential surface in a plan view. Each of the first protective portion 56a to the third protective portion 56c has a curved inner circumferential surface in a plan view, and is a part of a substantially circle substantially centered on the central axis O.

[0024] As shown in FIG. 7(a), in a plan view, the first protective portion 56a to the third protective portion 56c are positioned radially with the central axis O as the approximate center. Also, as shown in FIG. 7(a), the first protective portion 56a to the third protective portion 56c are positioned at intervals in the circumferential direction with the central axis O as the approximate center. In this embodiment, the first protective portion 56a to the third protective portion 56c are positioned such that the interval (angle α) between the adjacent protective portions 56a to 56c is equal (here, approximately 120 degrees) with the central axis O as the approximate center. Here, the interval between the adjacent protective portions 56a to 56c is based on the center of the width W of the protective portions 56a to 56c. The first protective portion 56a to the third protective portion 56c are positioned at intervals in the circumferential direction, and thus an opening 60 is formed between each of the adjacent protective portions 56a to 56c. The opening 60 communicates the outside of the protective member 51 with the inside of the protective member 51. In FIG. 7(c), the opening 60 between the first protective portion 56a and the second protective portion 56b is shown colored gray. The colored opening 60 shown in FIG. 7(c) is composed of one side surface of the first protective portion 56a, the other side surface of the second protective portion 56b, a part of the outer circumferential surface of the upper mounting portion 52, and a part of the outer circumferential surface of the lower mounting portion 54. The opening 60 expands from the central axis O side toward the outside. Specifically, as shown in FIG. 7(a), if the distance between the first protective portion 56a and the second protective portion 56b is the width G of the opening 60, the width G of the opening 60 is short when it is close to the central axis O and becomes longer as it is farther from the central axis O. The width G of the opening 60 is short when it is close to the inside of the protective member 51 and becomes longer as it is farther from the inside of the protective member 51.

[0025] The reinforcing member 71 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 71 not only reinforces the strength of the main body member 41, but also suppresses rattling 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 71 is made of, for example, an aluminum alloy.

[0026] As shown in FIG. 5, the reinforcing member 71 is substantially cylindrical and has an outer diameter larger than the outer diameter D of the main body member 41. The reinforcing member 71 has a plurality of (here, two) bulging portions 72a, 72b in which a portion of the outer peripheral surface bulges in the radial direction. The bulging portions 72a, 72b protrude in the radial direction via gentle inclination portions. The reinforcing member 71 has a mounting hole 73 that opens at the top and bottom to insert the main body member 41 therein. Therefore, the reinforcing member 71 can be attached to the main body member 41 by inserting the main body member 41 into the mounting hole 73 and fixing the reinforcing member 71 to the main body member 41 at a predetermined position from the lower end of the main body member 41 with bolts, rivets, or the like. The vertical dimension of the reinforcing member 71 is not particularly limited, but is set to a length approximately equal to the depth of the insertion hole 23 of the corner member 22 .

[0027] As shown in Fig. 5, the insertion hole 23 of the corner member 22 into which the reinforcing member 71 is inserted has spaces 27a, 27b as recesses that allow the insertion of the bulging parts 72a, 72b of the reinforcing member 71. Therefore, the hand push members 40A-40D are positioned at predetermined positions by inserting the reinforcing member 71 fixed to the main body member 41 into the insertion hole 23 with the bulging parts 72a, 72b aligned with the spaces 27a, 27b. The reinforcing member 71 functions as a positioning part. Therefore, the hand push members 40A-40D are prevented from rotating around the central axis O within the insertion hole 23 of the corner member 22.

[0028] Next, the positions of the first to third protective parts 56a to 56c when the push members 40A to 40D are attached to the cart body 20 will be described. Here, the push member 40B will be described. The first protective portion 56a to the third protective portion 56c of the push member 40A are arranged in a direction perpendicular to the center line C1 of the cart body 20 shown in FIG. The first protective portion 56a to the third protective portion 56c of the push members 40C and 40D are positioned symmetrically to the first protective portion 56a to the third protective portion 56c of the push members 40A and 40B with respect to the center line C2 of the cart body 20.

[0029] As shown in FIG. 6(b), in plan view (viewed from the direction along the longitudinal direction of the grip portion 42), the first protective portion 56a is located at a position protruding from the outer periphery of the carriage body portion 20, specifically, on the left side of the outer periphery. A central portion 59 of the first protective portion 56a does not overlap with the carriage body portion 20, and is located outside the carriage body portion 20. The first protective portion 56a is located overlapping with a straight line E1 along the left-right direction passing through the central axis O. The central portion 59 of the first protective portion 56a is located overlapping with the straight line E1. In side view (viewed from a direction perpendicular to the longitudinal direction of the grip portion 42), specifically, when viewed from the direction along the straight line E1, the first protective portion 56a is located overlapping with the grip portion 42.

[0030] As shown in FIG. 6(b), in a plan view, the second protective portion 56b is located at a position protruding from the outer periphery of the dolly body 20, specifically, on the rear side of the outer periphery. A central portion 59 of the second protective portion 56b does not overlap the dolly body 20, and is located outside the dolly body 20. The second protective portion 56b does not overlap a straight line E1 along the left-right direction passing through the central axis O, and a straight line E2 along the front-rear direction, and is located overlapping a straight line E3 (a straight line E3 obtained by rotating the straight line E1 by 60 degrees clockwise about the central axis O) that passes through the central axis O and is oblique to the front-rear direction and the left-right direction. The central portion 59 of the second protective portion 56b does not overlap the straight line E1 and the straight line E2, and is located overlapping the straight line E3. In a side view, specifically, when viewed from the direction along the straight line E3, the second protective portion 56b is located overlapping the grip portion 42.

[0031] As shown in FIG. 6(b), in a plan view, the third protective portion 56c is positioned so as to overlap with the carriage body 20. A central portion 59 of the third protective portion 56c is positioned so as to overlap with the carriage body 20. The third protective portion 56c is positioned so as not to overlap with a straight line E1 along the left-right direction passing through the central axis O and a straight line E2 along the front-rear direction, but is positioned so as to overlap with a straight line E4 (a straight line E4 obtained by rotating the straight line E1 by 60 degrees counterclockwise about the central axis O) passing through the central axis O and oblique to the front-rear direction and the left-right direction. The central portion 59 of the third protective portion 56c is positioned so as not to overlap with the straight line E1 and the straight line E2, but is positioned so as to overlap with the straight line E4. In a side view, specifically, when viewed from the direction along the straight line E4, the third protective portion 56c is positioned so as to overlap with the grip portion 42.

[0032] When an operator grasps the grip portion 42 of the hand pushing member 40B attached to the cart body 20 so that the first protective portion 56a to the third protective portion 56c are in the above-mentioned positions, the operator inserts his / her hand from between the first protective portion 56a and the second protective portion 56b toward the grip portion 42. At this time, the operator inserts his / her hand through an opening 60 that connects the outside of the protective member 51 with the inside of the protective member 51. Here, since the opening 60 is expanded from the central axis O side toward the outside, the operator can easily insert his / her hand through the opening 60. As shown in a plan view in FIG. 8(a), when an operator grasps grip portion 42, the back of the hand or the third joint is positioned between grip portion 42 and first protective portion 56a, the thumb is positioned between grip portion 42 and second protective portion 56b, and the tips of the index finger through little finger are positioned between grip portion 42 and third protective portion 56c.

[0033] In this way, the first protective portion 56a to the third protective portion 56c are positioned outside the grip portion 42, and when the worker grasps (holds) the grip portion 42, the first protective portion 56a to the third protective portion 56c can protect the worker's hands from objects. Specifically, when the push members 40A to 40D approach an object around the transport cart 1, the first protective portion 56a and the second protective portion 56c can protect the worker's hands from objects. Since the third protective portion 56b comes into contact with an object, it is possible to prevent the hand of the user gripping the grip portion 42 from coming into contact with the object. In addition, when the loaded object collapses or falls over, the third protective portion 56c comes into contact with the object, so it is possible to prevent the hand of the user gripping the grip portion 42 from coming into contact with the object.

[0034] The worker can insert his / her hand between the second protective portion 56b and the third protective portion 56c, or between the third protective portion 56c and the first protective portion 56a. Therefore, even when the worker wants to run the transport cart 1 in the left-right direction or when the worker wants to change direction and run the transport cart 1, the worker can grasp the grip portion 42 through the opening 60 that is easiest to insert his / her hand into among the multiple openings 60.

[0035] (Variation 1) In the above-described first embodiment, the protective member 51 has the first protective portion 56a to the third protective portion 56c. However, this is not limited to this case, and the protective member 51 may have any one of the first protective portion 56a to the third protective portion 56c. Specifically, the protective member 51 may have a first protective portion 56a, but not have the second protective portion 56b or the third protective portion 56c. Alternatively, the protective member 51 may have a second protective portion 56b, but not have the first protective portion 56a or the third protective portion 56c. Alternatively, the protective member 51 may have a third protective portion 56c, but not have the first protective portion 56a or the second protective portion 56b.

[0036] (Variation 2) In the above-described first embodiment, the protective member 51 has the first protective portion 56a to the third protective portion 56c. However, this is not limited to this case, and the protective member 51 may have any two of the first protective portion 56a to the third protective portion 56c. Specifically, the protective member 51 may have a first protective portion 56a and a second protective portion 56b, but not a third protective portion 56c. Alternatively, the protective member 51 may have a second protective portion 56b and a third protective portion 56c, but not a first protective portion 56c. Alternatively, the protective member 51 may have a first protective portion 56a and a third protective portion 56c, but not a second protective portion 56b. In this modified example, the adjacent protective parts are positioned so that the interval (angle α) between them is different in the clockwise and counterclockwise directions about the central axis O. For example, in a configuration in which the protective member 51 has the first protective part 56a and the second protective part 56b, but does not have the third protective part 56c, the angle from the first protective part 56a to the second protective part 56b is 240 degrees in the clockwise direction and 120 degrees in the counterclockwise direction. In addition, the adjacent protective parts are positioned so that the interval between them is other than 180 degrees.

[0037] <Second embodiment> 9 is a diagram showing an example of a push member 240 according to the second embodiment. Note that the description of the same configuration as in the first embodiment will be omitted as appropriate. The push member 240 has a main body member 41 as a main body portion, a protective member 251, and a reinforcing member 71. The protective member 251 has an upper attachment portion 52, a lower attachment portion 54, and a first protective portion 256a to a fourth protective portion 256d, which are integrally formed. The protective member 251 of this embodiment differs from the protective member 51 of the first embodiment in that it has four protective portions. The first to fourth protective parts 256a to 256d are positioned outside the grip part 42 to protect the user's hands when gripping the grip part 42. The first to fourth protective parts 256a to 256d all have the same shape. In addition, the first to fourth protective parts 256a to 256d have the same shape as the first to third protective parts 56a to 56c.

[0038] As shown in FIG. 9, in a plan view, the first to fourth protective parts 256a to 256d are positioned radially with the central axis O as the approximate center. Also, as shown in FIG. 9, the first to fourth protective parts 256a to 256d are positioned at intervals in the circumferential direction with the central axis O as the approximate center. In this embodiment, the first to fourth protective parts 256a to 256d are positioned so that the intervals between adjacent protective parts 256a to 256d are equal (here, approximately 90 degrees) with the central axis O as the approximate center. Here, the intervals between adjacent protective parts 256a to 256d are based on the center of the width W of the protective parts 256a to 256d. The first to fourth protective parts 256a to 256d are positioned at intervals in the circumferential direction, and thus openings 260 are formed between adjacent protective parts 256a to 256d. The opening 260 allows communication between the outside of the protective member 251 and the inside of the protective member 251 .

[0039] Next, the positions of the first to fourth protective parts 256a to 256d when the push members 240A to 240D are attached to the cart main body 20 will be described. Here, the push member 240B will be described, but the first protective part 256a to the fourth protective part 256d of the push member 240A are positioned symmetrically to the first protective part 256a to the fourth protective part 256d of the push member 240B with respect to the center line C1 of the cart body part 20 shown in Fig. 2. Also, the first protective part 256a to the fourth protective part 256d of the push members 240C and 240D are positioned symmetrically to the first protective part 256a to the fourth protective part 256d of the push members 240A and 240B with respect to the center line C2 of the cart body part 20.

[0040] 9, in a plan view, the first protective portion 256a and the third protective portion 256c are located at positions protruding from the outer periphery of the carriage body portion 20, specifically, on the left side and rear side of the outer periphery, respectively. Furthermore, the central portions 59 of the first protective portion 256a and the third protective portion 256c do not overlap with the carriage body portion 20, and are located outside the carriage body portion 20. Furthermore, the first protective portion 256a and the third protective portion 256c do not overlap with a straight line E1 that passes through the central axis O along the left-right direction and a straight line E2 that passes through the central axis O along the front-rear direction, but overlap with a straight line E5 that passes through the central axis O and is oblique to the front-rear direction and the left-right direction (a straight line E5 obtained by rotating the straight line E1 45 degrees clockwise approximately about the central axis O). Furthermore, in side view, specifically, when viewed from the direction along the straight line E5, the first protection portion 256a and the third protection portion 256c are positioned so as to overlap with the grip portion .

[0041] 9, in a plan view, the second protective portion 256b is located at a position protruding from the outer periphery of the dolly body 20, specifically, diagonally rearward to the left of the outer periphery. A central portion 59 of the second protective portion 256b does not overlap the dolly body 20, and is located outside the dolly body 20. The second protective portion 256b does not overlap a straight line E1 along the left-right direction passing through the central axis O, and a straight line E2 along the front-rear direction, and is located overlapping a straight line E6 (a straight line E6 obtained by rotating the straight line E1 45 degrees counterclockwise about the central axis O) that passes through the central axis O and is oblique to the front-rear direction and the left-right direction. In a side view, specifically, when viewed from the direction along the straight line E6, the second protective portion 256b is located overlapping the grip portion 42.

[0042] 9, in a plan view, the fourth protective portion 256d is positioned so as to overlap with the carriage body portion 20. A central portion 59 of the fourth protective portion 256d is positioned so as to overlap with the carriage body portion 20. The fourth protective portion 256d is positioned so as not to overlap with a straight line E1 along the left-right direction passing through the central axis O and a straight line E2 along the front-rear direction, but is positioned so as to overlap with a straight line E6 passing through the central axis O. The central portion 59 of the fourth protective portion 256d is positioned so as not to overlap with the straight line E1 and the straight line E2, but is positioned so as to overlap with the straight line E6. In a side view, specifically, when viewed from the direction along the straight line E6, the fourth protective portion 256d is positioned so as to overlap with the grip portion 42.

[0043] In this way, by positioning the first protective portion 256a to the fourth protective portion 256d on the outside of the grip portion 42, when the worker grasps (squeezes) the grip portion 42, the first protective portion 256a to the fourth protective portion 256d can protect the worker's hands from objects.

[0044] (Variation 3) In the above-mentioned second embodiment, the case where the protective member 251 has the first protective portion 256a to the fourth protective portion 256d has been described, but this is not limited to this case, and the protective member 251 may have any one of the first protective portion 256a to the fourth protective portion 256d. Specifically, the protective member 251 may have a first protective portion 256a, but not the second protective portion 256b to the fourth protective portion 256d. The protective member 251 may have a second protective portion 256b, but not the first protective portion 256a, the third protective portion 256c, or the fourth protective portion 256d. The protective member 251 may have a third protective portion 256c, but not the first protective portion 256a, the second protective portion 256b, or the fourth protective portion 256d. The protective member 251 may have a fourth protective portion 256d, but not the first protective portion 256a to the third protective portion 256c.

[0045] (Variation 4) In the above-mentioned second embodiment, the case where the protective member 251 has the first protective portion 256a to the fourth protective portion 256d has been described, but this is not limited to this case, and the protective member 251 may have any two of the first protective portion 256a to the fourth protective portion 256d. Specifically, the protective member 251 may be configured to have a first protective portion 256a and a second protective portion 256b, may be configured to have a first protective portion 256a and a third protective portion 256c, or may be configured to have a first protective portion 256a and a fourth protective portion 256d. Also, the protective member 251 may be configured to have a second protective portion 256b and a third protective portion 256c, or may be configured to have a second protective portion 256b and a fourth protective portion 256d. Also, the protective member 251 may be configured to have a third protective portion 256c and a fourth protective portion 256d. In this modified example, the adjacent protective parts may be positioned so that the interval (angle α) between them is different in the clockwise and counterclockwise directions about the central axis O. For example, when the protective member 251 has a first protective part 256a and a second protective part 256b, the angle from the first protective part 256a to the second protective part 256b is 270 degrees in the clockwise direction and 90 degrees in the counterclockwise direction. On the other hand, when the protective member 251 has a first protective part 256a and a third protective part 256c, the interval between the adjacent protective parts is 180 degrees.

[0046] (Variation 5) In the above-mentioned second embodiment, the case where the protective member 251 has the first protective portion 256a to the fourth protective portion 256d has been described, but this is not limited to this case, and the protective member 251 may have any three of the first protective portion 256a to the fourth protective portion 256d. Specifically, the protective member 251 may be configured to have a first protective portion 256a to a third protective portion 256c, or may be configured to have a first protective portion 256a, a third protective portion 256c, and a fourth protective portion 256d, or may be configured to have a first protective portion 256a, a second protective portion 256b, and a fourth protective portion 256d. Moreover, the protective member 251 may be configured to have the second protective portion 256b to the fourth protective portion 256d. In this modified example, adjacent protective portions are positioned so that the intervals (angle α) are different approximately around the central axis O. For example, in the case where protective member 251 has first protective portion 256a to third protective portion 256c, the intervals between first protective portion 256a and second protective portion 256b and between second protective portion 256b and third protective portion 256c are 90 degrees, and the interval between third protective portion 256c and first protective portion 256d is 180 degrees.

[0047] <Third embodiment> 10 is a diagram showing an example of a protection member 351 according to the third embodiment. Note that the description of the same configuration as in the first embodiment will be omitted as appropriate. The protective member 351 has an upper attachment portion 52, a lower attachment portion 54, and a first protective portion 356a to a third protective portion 356c, which are integrally formed. The first to third protective portions 356a to 356c are positioned outside the grip portion 42 to protect the user's hand that grasps the grip portion 42. The first to third protective portions 356a to 356c of the present embodiment all have the same shape.

[0048] The first protective portion 356a to the third protective portion 356c are substantially U-shaped and connect the upper mounting portion 52 and the lower mounting portion 54. The first protective portion 356a to the third protective portion 356c extend from the upper mounting portion 52 away from the central axis O, then hang down toward the lower side, and extend to the lower mounting portion 54 toward the central axis O. Specifically, the first protective portion 356a to the third protective portion 356c are composed of an upper portion 357, a lower portion 358, and a central portion 359. The upper portion 357 extends outward from the outer circumferential surface of the upper mounting portion 52. The lower portion 358 extends outward from the outer circumferential surface of the lower mounting portion 54. The central portion 359 is aligned in the vertical direction, with the upper side connected to the upper portion 357 and the lower side connected to the lower portion 358. In this manner, since upper portion 357 and lower portion 358 do not extend obliquely, opening 360 can be formed wide, so that an operator can easily insert his / her hand through opening 360.

[0049] (Variation 5) In the above-described third embodiment, the first to third protective portions 356a to 356c are configured by the upper portion 357, the lower portion 358, and the central portion 359. However, the present invention is not limited to this. As indicated by the two-dot chain line in Fig. 10, the protective member 351 may be configured to eliminate the upper portion 357 and the lower portion 358 by enlarging the outer diameters of the upper mounting portion 52 and the lower mounting portion 54.

[0050] <Fourth embodiment> 11 is a diagram showing an example of a protection member 451 according to the fourth embodiment. Note that the description of the same configuration as in the first embodiment will be omitted as appropriate. The protective member 451 has an upper attachment portion 52, a lower attachment portion 54, a first protective portion 56a to a third protective portion 56c, and a grip portion 442, which are integrally formed.

[0051] The grip portion 442 is grasped by the user when the transport cart 1 is driven. That is, in the hand push member of this embodiment, the grip portion 42 is not provided on the main body member 41, but the protective member 451 has the grip portion 442. The grip portion 442 is located between the upper mounting portion 52 and the lower mounting portion 54. Specifically, it is integrally formed with the lower end of the upper mounting portion 52 and the upper end of the lower mounting portion 54. The grip portion 442 is substantially cylindrical and long in the up-down direction with the central axis O as the approximate center. The grip portion 442 has an outer diameter larger than the outer diameter D of the main body member in a plan view. Also, the grip portion 442 has an outer diameter smaller than the outer diameter D1 of the upper mounting portion 52 and smaller than the outer diameter D2 of the lower mounting portion 54 in a plan view. However, the grip portion 442 may have an outer diameter substantially the same as the outer diameter D1 of the upper mounting portion 52 or substantially the same as the outer diameter D2 of the lower mounting portion 54 in a plan view.

[0052] Furthermore, the grip portion 442 has a hole 443 along the vertical direction. The hole 443 is sized to allow the main body member 41 to be inserted in the vertical direction. The hole 443 communicates with the insertion hole 53 of the upper mounting portion 52 and the through hole 55 of the lower mounting portion 54. The inner diameter of the hole 443 in a plan view is approximately the same as the inner diameter of the insertion hole 53 and is approximately the same as the inner diameter of the through hole 55. The protective member 451 can be attached to the main body member 41 by inserting the main body member 41 from below into the through hole 55, the hole 443 and the insertion hole 53, and fixing it to the main body member 41 by inserting an attachment member such as a bolt or rivet through the fixing hole 65. In this manner, the grip portion 442 can be easily configured by the protective member 451 having the grip portion 442. Note that the grip portion 442 may have a non-slip rib formed on its outer circumferential surface.

[0053] While the present invention has been described above using the above-mentioned embodiments, the present invention is not limited to the above-mentioned embodiments, and modifications and the like are possible within the scope of the present invention, and each embodiment and each modified example can be combined as appropriate.

[0054] In the above-mentioned embodiment, the first to third protective parts are all the same shape, or the first to fourth protective parts are all the same shape, but the present invention is not limited to this. At least one of the first to third protective parts may be a different shape, or all of them may be different shapes. Also, at least one of the first to fourth protective parts may be a different shape, or two may be the same shape and two may be different shapes, or all of them may be different shapes.

[0055] In the above-described embodiment, a case has been described in which one of the multiple protective parts overlaps with the bogie main body part 20 when viewed in a plan view, but two or more of the multiple protective parts may overlap with the bogie main body part 20. In the above-described embodiment, the protective member has an upper mounting portion and a lower mounting portion, but this is not limited to this case, and either the upper mounting portion or the lower mounting portion may be eliminated. In the above-described embodiment, the protective member has one to four protective portions. However, the present invention is not limited to this, and the protective member may have five or more protective portions. In the above-described embodiment, the protective portion is located on the outer side of the grip portion. However, the present invention is not limited to this case and can be modified as appropriate depending on the issues and the like. [Explanation of symbols]

[0056] 1: Transport cart 20: Cart body 30: Running part 40, 240: Push member 41: Main body member 42, 442: Grip part 51, 251, 351, 451: Protective member 56a, 256a, 356a, 456a: First protective part 56b, 256b, 356b, 456b: Second protective part 56c, 256c, 356c, 456c: Third protective part 256d: Fourth protective part

Claims

1. A hand push member that is detachably attached to a cart body of a transport cart and that a user pushes by hand when the transport cart is traveling, A long rod-shaped member aligned in the vertical direction; a protective member attached to an upper side of the rod-shaped member, The protective member has a protective portion for protecting the user's hand, The protective part is An upper portion located on the upper side and extending outward from the rod-shaped member; A lower portion located on the lower side and extending outward from the rod-shaped member; A hand push member characterized by having a vertically extending central portion connected to the upper end portion and the lower end portion.

2. A hand push member as described in Claim 1, characterized in that the upper and lower portions have an approximately constant thickness in the vertical direction.

3. A hand push member as described in claim 1 or 2, characterized in that the vertical thickness of the upper portion and the vertical thickness of the lower portion are approximately identical.

4. A hand push member described in any one of claims 1 to 3, characterized in that the central portion has a thickness that is approximately constant in the direction along the extension direction.

5. 5. The hand push member according to claim 1, wherein the central portion has a substantially constant width when viewed in the up-down direction.

6. The protective member has an upper mounting portion attached to an upper end of the rod-shaped member, 6. The hand push member according to claim 1, wherein the upper mounting portion is integrally formed with the upper portion.

7. A protective member attached to a long rod-shaped member along the up-down direction among hand push members that are detachably attached to a cart body of a transport cart and that are used by a user to push the cart by hand when the transport cart is traveling, The protective member has a protective portion for protecting the user's hand, The protective part is In a state in which the protective member is attached to the rod-shaped member, An upper portion located on the upper side and extending outward from the rod-shaped member; A lower portion located on the lower side and extending outward from the rod-shaped member; A protective member comprising: an upper end portion and a central portion along a vertical direction connected to the upper end portion and the lower end portion.

8. A protective member as described in claim 7, characterized in that the upper and lower portions have a substantially constant thickness in the vertical direction.

9. A protective member as described in claim 7 or 8, characterized in that the vertical thickness of the upper portion and the vertical thickness of the lower portion are approximately identical.

10. A protective member described in any one of claims 7 to 9, characterized in that the central portion has a substantially constant thickness in the direction along the extension direction.

11. 11. The protective member according to claim 7, wherein the central portion has a substantially constant width when viewed in the up-down direction.

12. An upper mounting portion attached to an upper end of the rod-shaped member, 12. The protective member according to claim 7, wherein the upper mounting portion is integrally formed with the upper portion.

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