Grip protectors for trolleys, push bars and trolleys

Abstract

To provide a handgrip protector for carts which exerts a higher protective capability when mounted on a hand rod stood at a corner of a cart.SOLUTION: A present invention is a handgrip protector capable of being mounted on a hand rod stood at least at one of four corners of a cart. The handgrip protector includes an upper support part, a lower support part, three or more vertical beams, and one or more transverse beams. The upper support part is mounted above the hand rod, and the lower support part is mounted on a lower side of the hand rod than the upper support part is. Each of the three or more vertical beams has the upper end connected to the upper support part, has the lower end connected to the lower support part, and has the center part protruded in a direction receding from the hand rod. Each of the transverse beams is connected between one vertical beam and another vertical beam, and the transverse beams are therefore all connected to the vertical beams. When the hand rod is seen from above, all the vertical beams 1 connected by the transverse beams are radially arranged from the hand rod at an angle of 90° or more.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a grip protector for a trolley, a push bar, and a trolley, and is particularly suitable for use as a grip attached to a trolley used to transport cargo at construction sites, etc. [Background technology]

[0002] At construction sites and the like, various cargoes need to be transported, and these are transported using carts and the like. Safety is extremely important at construction sites and the like, and various technologies have been proposed to protect the hands of those operating the carts from being pinched between the cart and surrounding obstacles.

[0003] The transport cart described in Patent Document 1 discloses protective members that are attached to push members that are set up vertically at the four corners. By attaching a disk-shaped protective member to at least one of the top and bottom of the part of the long push member that is grasped by the hand (grip portion), the hand grasping the grip portion is protected from being pinched by surrounding obstacles.

[0004] Patent Document 2 discloses an invention in which protective equipment is fitted to a wheelbarrow used to transport materials, etc., in a circular manner around the part of the handle that is gripped by the hand. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Publication No. 2018-39491 [Patent Document 2] U.S. Patent Publication No. 2015 / 0054241 Summary of the Invention [Problem to be solved by the invention]

[0006] As a result of the inventor's investigation of Patent Documents 1 and 2, it was found that there existed the following new problems: That is, it was found that the conventional techniques do not provide sufficient protection for the hands.

[0007] The protective member described in Patent Document 1 provides adequate protection when surrounding obstacles are parallel to the long push member, such as a vertical, smooth wall. However, at construction sites, areas where carts pass are typically filled with many irregularly uneven obstacles, such as piles of various materials and heavy machinery parked there. The invention in Patent Document 1 is based on the premise that the circular protective member will come into contact with the surrounding obstacles before the hand gripping the grip portion, but does not provide sufficient protection against such irregularly uneven obstacles.

[0008] By replacing the protective members attached to the push members erected at the four corners of the cart described in Patent Document 1 with protective equipment that surrounds the gripping points in a circle, as described in Patent Document 2, it is possible to expect a certain degree of protection against obstacles with irregular contours. However, even in this case, the protection is not sufficient. For example, while the protective equipment can protect hands from being pinched between the push member and a wall when the cart is moved sideways, it cannot protect hands from obstacles protruding forward when the cart is moved forward.

[0009] An object of the present invention is to provide a grip protector for a dolly that exhibits a higher protective function when attached to a push bar erected at the corner of the dolly.

[0010] The means for solving these problems will be described below, but other problems and novel features will become apparent from the description of this specification and the accompanying drawings. [Means for solving the problem]

[0011] The present invention provides a grip protector that can be attached to a push bar erected at at least one of the four corners of a trolley, and has an upper support part, a lower support part, three or more vertical beams, and one or more horizontal beams, and is configured as follows: The upper support part is attached above the push bar, and the lower support part is attached below the upper support part. Each of the three or more vertical beams is connected at its upper end to the upper support part and at its lower end to the lower support part, and extends away from the push bar at its center. Each horizontal beam is connected to all vertical beams from one vertical beam to another, and all vertical beams 1 connected by this horizontal beam are arranged radially from the push bar at an angle of 90° or more when viewed from above. [Effects of the Invention]

[0012] The effects obtained by the present invention can be briefly explained as follows.

[0013] In other words, it is possible to provide a grip protector for a trolley that exhibits a higher level of protection when attached to a push bar erected at the corner of the trolley. [Brief explanation of the drawings]

[0014] [Figure 1] FIG. 1 is a front view schematically showing a first configuration example of a grip protector of the present invention. [Figure 2] FIG. 2 is a top view schematically showing a first configuration example of the grip protector of the present invention. [Figure 3] FIG. 3 is a rear view schematically showing a first configuration example of the grip protector of the present invention. [Figure 4] FIG. 4 is a bottom view schematically showing a first configuration example of the grip protector of the present invention. [Figure 5] FIG. 5 is a right side view schematically showing a first configuration example of the grip protector of the present invention. [Figure 6] FIG. 6 is a left side view schematically showing a first configuration example of the grip protector of the present invention. [Figure 7]FIG. 7 is a perspective view schematically showing a first configuration example of the grip protector of the present invention. [Figure 8] FIG. 8 is an explanatory diagram showing an example of use of the grip protector of the present invention attached to a dolly. [Figure 9] FIG. 9 is a front view schematically showing a second configuration example of the grip protector of the present invention. [Figure 10] FIG. 10 is a top view schematically showing a second configuration example of the grip protector of the present invention. [Figure 11] FIG. 11 is a rear view schematically showing a second configuration example of the grip protector of the present invention. [Figure 12] FIG. 12 is a bottom view schematically showing a second configuration example of the grip protector of the present invention. [Figure 13] FIG. 13 is a right side view schematically showing a second configuration example of the grip protector of the present invention. [Figure 14] FIG. 14 is a left side view schematically showing a second configuration example of the grip protector of the present invention. [Figure 15] FIG. 15 is a front view schematically showing a third configuration example of the grip protector of the present invention. [Figure 16] FIG. 16 is a top view schematically showing a third configuration example of the grip protector of the present invention. [Figure 17] FIG. 17 is a front view schematically showing a fourth configuration example of the grip protector of the present invention. [Figure 18] FIG. 18 is a top view schematically showing a fourth configuration example of the grip protector of the present invention. [Figure 19] FIG. 19 is a rear view schematically showing a fourth configuration example of the grip protector of the present invention. [Figure 20] FIG. 20 is a bottom view schematically showing a fourth configuration example of the grip protector of the present invention. [Figure 21] FIG. 21 is a right side view schematically showing a fourth configuration example of the grip protector of the present invention. [Figure 22] FIG. 22 is a left side view schematically showing a fourth configuration example of the grip protector of the present invention. [Figure 23] FIG. 23 is a perspective view schematically showing a fourth configuration example of the grip protector of the present invention. [Figure 24] FIG. 24 is an explanatory diagram showing an example of use in which the grip protector of the fourth configuration example is attached to a dolly. [Figure 25] FIG. 25 is a front view schematically showing a fifth configuration example of the grip protector of the present invention. [Figure 26] FIG. 26 is a top view schematically showing a fifth configuration example of the grip protector of the present invention. [Figure 27] FIG. 27 is a rear view schematically showing a fifth configuration example of the grip protector of the present invention. [Figure 28] FIG. 28 is a bottom view schematically showing a fifth configuration example of the grip protector of the present invention. [Figure 29] FIG. 29 is a right side view schematically showing a fifth configuration example of the grip protector of the present invention. [Figure 30] FIG. 30 is a left side view schematically showing a fifth configuration example of the grip protector of the present invention. [Figure 31] FIG. 31 is a front view schematically showing a modification of the first configuration example of the grip protector of the present invention. [Figure 32] FIG. 32 is an explanatory diagram that schematically shows a modified example of the upper support part in the first and fourth configuration examples of the grip protector of the present invention. [Figure 33] FIG. 33 is a front view schematically showing one example of the configuration of the attachment mechanism in the fourth example of the grip protector of the present invention. [Figure 34] FIG. 34 is an explanatory diagram of a stopper that constitutes the attachment mechanism of FIG. DETAILED DESCRIPTION OF THE INVENTION

[0015] 1. Overview of the embodiment First, an outline of the exemplary embodiments disclosed in the present application will be described. In the outline of the exemplary embodiments, reference numerals in parentheses in the drawings merely illustrate components included in the concept of the components to which the reference numerals are attached.

[0016] [1] Grip protector attached to a push bar A representative embodiment disclosed in this application is a grip protector (10) that can be attached to a push bar (11) erected at at least one of the four corners of a cart (20), and has an upper support part (3), a lower support part (5), three or more longitudinal beams (1), and one or more horizontal beams (2), and is configured as follows: Here, the push bar is a columnar, elongated member, such as a single pipe, that rises roughly vertically from the platform of the cart.

[0017] The upper support part is attached to the upper part of the push bar. Here, the upper part of the push bar may be the upper end or the middle. The lower support portion is attached to the push bar below the upper support portion. Each of the three or more vertical beams has an upper end connected to the upper support portion and a lower end connected to the lower support portion, and extends at its center in a direction away from the push bar. Each of the one or more horizontal beams is connected to all of the longitudinal beams, from one longitudinal beam to another longitudinal beam. All of the vertical beams 1 connected by one or more cross beams are arranged radially around the push bar, with the angle (θ) between the vertical beam to which one end of the cross beam is connected and the vertical beam to which the other end of the cross beam is connected being 90° or more when the push bar is viewed from above.

[0018] As a result, the grip protector of the present invention provides enhanced protection when attached to a push bar installed at the corner of a trolley. When a worker grips the push bar (11) between the upper support part (3) and the lower support part (5) to operate the trolley (20), the grip protector (10) can cover the worker's hands, which are gripped by three or more longitudinal beams (1) and one or more cross beams (2) at the front and side of the trolley (20), providing enhanced protection. The angle is preferably 90° or greater to cover the front and side of the trolley, and is preferably between 90° and 270°. The larger the angle, the higher the protection performance, but the smaller the angle of the remaining open area where the hand can be inserted and removed to grip the push bar (11), reducing workability. It is recommended that the design be appropriately balanced between protection performance and workability. The number and thickness (width) of the longitudinal beams (1) and cross beams (2) should also be appropriately designed with protection performance in mind. Increasing the number and thickness (width) of the pads improves the performance of protecting the hands, but increases the amount of materials used, which increases costs and the overall weight.

[0019] [2] The longitudinal beams are semicircular or semielliptical. In the grip protector of [1], each of the three or more longitudinal beams is semicircular or semielliptical.

[0020] This allows the external force applied when the vertical beam comes into contact with a surrounding obstacle to be distributed and absorbed more or less evenly, resulting in a strong vertical beam. The shape of the vertical beam may be any shape as long as its upper end is connected to the upper support part and its lower end to the lower support part, as in [1], and its central part is connected in a direction away from the push rod. For example, it may have a broken line structure like three sides that make up half of a regular hexagon. Among these, as specified in [2], making the shape of the vertical beam semicircular or semielliptical is the most suitable, as it effectively distributes and absorbs the external force evenly.

[0021] [3] Grip protector that can be easily attached and detached to a single pipe In [1], the push bar is a single pipe, and the upper support part of the grip protector has an insertion part (4) that is inserted into the single pipe that is the push bar and a top plate (3) that covers the upper end surface of the single pipe, and the upper ends of each of the three or more vertical beams are connected to the top plate, and the lower support part is annular and contacts the outer peripheral surface of the single pipe that is the push bar.

[0022] This makes it easy to attach and detach the grip protector of this embodiment to and from the push bar.

[0023] [4] Part to be gripped by hand (outer tube) (Figure 31) In [1], the push bar is a single pipe, and the upper support part of the grip protector has an outer tube part (6) that covers the periphery of the single pipe that is the push bar and a top plate that covers the upper end surface of the single pipe, and the upper ends of each of the three or more vertical beams are connected to the top plate, and the lower support part is annular and contacts the outer peripheral surface of the single pipe that is the push bar.

[0024] This makes it easy to attach and detach the grip protector of this embodiment to and from the push bar.

[0025] [5] Cart equipped with grip protectors (Figures 8 and 24) A typical embodiment disclosed in this application is a trolley in which a push bar erected at at least one of the four corners of the trolley is made of a single pipe, and a grip protector according to any one of [1] to [4] is attached to the push bar.

[0026] This provides a safer trolley when maneuvering a corner-mounted push bar.

[0027] [6] Push bar with grip protection A representative embodiment disclosed in this application is a long push bar (11) that can be erected at at least one of the four corners of a trolley (20), and is equipped with a grip protection part (10) having an upper support part (3), a lower support part (5), three or more longitudinal beams (1), and one or more horizontal beams (2), and is configured as follows:

[0028] The upper support part is a part above the push bar or a member attached to the upper end of the push bar, and the lower support part is a part below the upper support part or a member attached to the push bar. Each of the three or more vertical beams has an upper end connected to the upper support portion and a lower end connected to the lower support portion, and protrudes at its center in a direction away from the push bar. Each of the one or more cross beams is connected to all of the vertical beams from one vertical beam to another vertical beam, and all of the vertical beams 1 connected by the one or more cross beams are arranged radially around the push bar so that, when the push bar is viewed from above, the angle (θ) between the vertical beam to which one end of the cross beam is connected and the vertical beam to which the other end of the cross beam is connected is 90° or more.

[0029] This makes it possible to provide a push bar equipped with a grip protector that is placed on the corner of a trolley and provides higher protection when operating the trolley. The grip protector may be configured as one piece with the push bar, or it may be detachable. The angle of the vertical beams (1) of the grip protector (10) and the number and thickness (width) of the vertical beams (1) and cross beams (2) are the same as those described above in [1].

[0030] [7] The longitudinal beams are semicircular or semielliptical. In the grip protection part of [6], each of the three or more vertical beams is semicircular or semielliptical.

[0031] This allows the external force when the vertical beam comes into contact with a surrounding obstacle to be dispersed and absorbed almost evenly, resulting in a strong vertical beam.

[0032] [8] Grip protector that can be easily attached and detached to a single pipe In the grip protection part of [6], the upper support part is attached to the upper end surface of the push bar and is a plate-like member of an approximately circular or polygonal shape to which the upper ends of each of the three or more vertical beams are connected, and the lower support part is annular and contacts the outer peripheral surface of the push bar.

[0033] This makes it possible to provide a push bar equipped with a grip protector that is easy to attach and detach. The shape of the upper support part is arbitrary, but it is preferable that it be a plate-like shape that is approximately circular or polygonal.

[0034] [9] A cart equipped with a push bar with a grip protector (Fig. 8, Fig. 24) A representative embodiment disclosed in the present application is a cart (20) equipped with a push bar according to any one of [6] to [8].

[0035] This provides a safer trolley when maneuvering a corner-mounted push bar.

[0036] 2. Details of the embodiment The embodiment will be described in further detail.

[0037] [Embodiment 1] Figures 1 to 6 are six-view diagrams schematically showing a first configuration example of the grip protector of the present invention. Figure 1 is a front view, Figure 2 is a top view, Figure 3 is a rear view, Figure 4 is a bottom view, Figure 5 is a right side view, and Figure 6 is a left side view. Furthermore, Figure 7 is a perspective view schematically showing this first configuration example, and Figure 8 is an explanatory diagram showing an example of use in which this grip protector is attached to a dolly.

[0038] A first configuration example of the grip protector 10 of the present invention shown as embodiment 1 is a grip protector 10 that can be attached to a push bar 11 erected at at least one of the four corners of a cart 20 (see FIG. 8). The cart 20 is configured so that the push bars 11 can be erected approximately vertically at the four corners of a loading platform 18 equipped with wheels (casters) 19. For example, holes are provided at the four corners of the loading platform 18 so that the push bars 11 can be inserted. Any number of push bars 11 can be attached depending on the size and shape of the cargo. The push bars 11 may be individually designed for each type of cart 20, or they may be general-purpose products, such as single pipes made by cutting a standard diameter iron pipe to a desired length. The length of the push bar 11 can be any length, such as 80 cm, 90 cm, 100 cm, or 120 cm, and the height can be used as a guide for the maximum height of cargo that can be loaded. The grip protector 10 of the present invention is attached to, for example, two push bars 11 in the short side direction, as shown in Fig. 8. A worker can operate the cart 20 by grasping the two push bars 11 to which the grip protector 10 is attached.

[0039] The grip protector 10 has an upper support part 3, a lower support part 5, three or more vertical beams 1, and one or more horizontal beams 2, and is configured as follows (see Figs. 1 to 7). Figs. 1 to 7 show an example in which there are three vertical beams 1 and one horizontal beam 2, and the three vertical beams 1 and one horizontal beam 2 are detachably attached to the upper end of a single pipe push bar 11.

[0040] The upper support 3 is attached to the upper end of the push bar 11, and the lower support 5 is attached below the upper support 3. Each of the three vertical beams 1 is connected at its upper end to the upper support 3 and at its lower end to the lower support 5, and extends away from the push bar 11 at its center. Each of the one or more cross beams 2 is connected to all of the vertical beams 1, from one vertical beam 1 to another. In this example, the cross beams 2 are connected laterally to the three vertical beams 1 approximately at their centers. When viewed from above, all of the vertical beams 1 connected by one or more cross beams 2 are arranged radially around the push bar 11, with the angle (θ) between the vertical beam 1 to which one end of the cross beam 2 is connected and the vertical beam 1 to which the other end is connected being 90° or more. In this example, the three vertical beams 1 connected to both ends of the cross beam 2 are arranged radially, with an angle of approximately 180° (see Figure 2).

[0041] In this embodiment, each of the vertical beams 1 is semicircular or semielliptical. This allows the force applied from the outside (external contact force) when the vertical beams 1 come into contact with a surrounding obstacle to be distributed and absorbed approximately evenly, resulting in a strong vertical beam 1. In addition, in this embodiment, the horizontal beams 2 are also semicircular. When a surrounding obstacle comes into contact with the intersection of the central vertical beam 1 and horizontal beam 2, the external contact force is distributed approximately evenly in all directions, further increasing the strength.

[0042] In this embodiment, the push bar 11 is a single pipe, and the upper support part 3 of the grip protector 10 has an inserted part 4 that is inserted into the single pipe that is the push bar 11, and a top plate 3 that covers the upper end surface of the single pipe. The upper support part and its top plate are indicated by the same reference numeral 3, but the upper support part may be understood to be composed of the top plate and the inserted part, or it may be understood that the inserted part 4 is added to the top plate, which is a plate-shaped upper support part. The upper ends of the three or more vertical beams 1 are connected to the top plate 3, and the lower support part 5 is annular and contacts the outer peripheral surface of the single pipe that is the push bar 11.

[0043] This makes it easy to attach and detach the grip protector 10 to the push bar 11. Furthermore, because the push bar 11 is a single pipe, i.e., a circular pipe, the grip protector 10 can rotate freely at the upper end of the push bar 11. This allows the push bar 11 to be adjusted appropriately to suit the direction in which the gripping hand is inserted and the direction of travel.

[0044] Instead of attaching the insert 4 to the top plate, the upper support part 3 can be modified to have an outer tube 6 attached to the top plate, which can surround the outer periphery of the single-tube push bar 11. FIG. 31 is a front view schematically illustrating a modification of the first exemplary configuration of the grip protector of the present invention. The outer tube 6 may have an inner diameter slightly larger than the outer periphery of the single-tube push bar 11, allowing the entire grip protector 10 to rotate freely at the upper end of the push bar 11. Alternatively, the outer tube 6 may be fitted into the single-tube push bar 11, and the entire grip protector 10 may be fixed to the upper end of the push bar 11. Furthermore, the outer tube 6 may be configured to be connected to both the upper support part 3 and the lower support part 5, as shown in the figure, or it may be connected to both the upper support part 3 and the lower support part 5. Furthermore, when configured to be connected to both the upper support part 3 and the lower support part 5, the outer cylinder part 6 may have a flat surface, or may have multiple grooves or protrusions surrounding it to prevent slipping, or may be configured so that the part that comes into contact with the palm when gripped remains flat while the surface that comes into contact with the fingers has irregularities that conform to the fingers to guide the gripping direction. In this case, the worker can sense that they are gripping in the correct direction by the feel of their grip, and the vertical beams 1 and horizontal beams 2 that protect the gripping hand can be configured to be oriented in the appropriate way to protect the hand.

[0045] Various materials can be used for the components that make up the grip protector 10. For example, all components can be integrally molded from plastic, all or some of the components can be made from hard rubber, or the entire component can be made from metal and welded together. Furthermore, when all or some of the components are made from hard rubber, strength can be increased by using a metal wire as a core. Instead of forming a core, strength can be increased by devising the shape of the cross section of one or both of the vertical beams 1 and the horizontal beams 2, such as by forming a box-shaped, U-shaped, or U-shaped rib.

[0046] [Embodiment 2] Figures 9 to 14 are six-view diagrams schematically showing a second configuration example of the grip protector of the present invention. Figure 9 is a front view, Figure 10 is a top view, Figure 11 is a rear view, Figure 12 is a bottom view, Figure 13 is a right side view, and Figure 14 is a left side view. Compared to the first configuration example (embodiment 1) explained with reference to Figures 1 to 6, this differs in that the longitudinal beam 1 is wider. Other configurations are the same as those of embodiment 1, so detailed explanations will be omitted.

[0047] By making the vertical beam 1 wider, the area covering the hand gripping the push bar 11 is increased, thereby enhancing protection performance. The thickness of the beam 1 can be kept at the same level as in embodiment 1, in which case the amount of projection from the push bar 11 to the surrounding area remains unchanged, so the possibility that the grip protector 10 will obstruct passage is reduced to the same level as in embodiment 1. On the other hand, by making the width wider, there is more room to devise the cross-sectional shape of the vertical beam 1 in order to increase its strength. For example, instead of a simple U-shape, the beam can be structurally strengthened by forming ribs on the inside of the U-shape or by using a honeycomb structure.

[0048] In this second embodiment, only the vertical beams 1 are widened, but it is also possible to widen the horizontal beams 2 in addition to or instead of the vertical beams 1. As described above, the area covered by the horizontal beams 2 can be expanded to further strengthen the structure.

[0049] [Embodiment 3] The above-mentioned first and second embodiments are configuration examples in which the number of vertical beams 1 is three, and the angle (θ) between the vertical beam 1 to which one end of the cross beam 2 is connected and the vertical beam 1 to which the other end is connected is 180°. In this third embodiment, a third configuration example will be described in which the number of vertical beams 1 is five and the angle (θ) is 240°.

[0050] 15 and 16 are a front view and a top view, respectively, showing a third example of the grip protector of the present invention. The bottom view, rear view, and left and right side views are omitted as they are self-explanatory.

[0051] The upper support part 3 is attached to the upper end of the push bar 11, and the lower support part 5 is attached below the upper support part 3. Each of the five vertical beams 1 has its upper end connected to the upper support part 3 and its lower end connected to the lower support part 5, and protrudes away from the push bar 11 at its center. Figure 15 shows an example of a semicircular or semi-elliptical shape, but this is not limited to this. When viewed from above, the five vertical beams 1 are arranged in an even radial pattern, opening 240° around the push bar 11, and are connected to the cross beams 2 at their centers. The other configurations are the same as those of embodiment 1, so detailed explanations will be omitted.

[0052] The grip protector 10 of this embodiment has five vertical beams 1 and a larger angle, allowing for detailed coverage over a wide area, thereby further improving protection performance.

[0053] As in the first embodiment, the width, thickness, material, cross-sectional structure, etc. of the beams can be selected from a variety of options.

[0054] [Embodiment 4] The grip protector 10 of the present invention may be attached not only to the upper end of the push bar 11 but also to any intermediate position.

[0055] Figures 17 to 22 are six-view diagrams schematically showing a fourth configuration example of the grip protector of the present invention. Figure 17 is a front view, Figure 18 is a top view, Figure 19 is a rear view, Figure 20 is a bottom view, Figure 21 is a right side view, and Figure 22 is a left side view. Furthermore, Figure 23 is a perspective view schematically showing this fourth configuration example, and Figure 24 is an explanatory diagram showing an example of use in which this grip protector is attached to a dolly.

[0056] The fourth configuration example of the grip protector 10 of the present invention shown as embodiment 4 is, like embodiment 1, a grip protector 10 that can be attached to a push bar 11 erected at at least one of the four corners of a dolly 20, but is an example in which the length of the push bar 11 is particularly long (see FIG. 24). The push bar 11 not only serves to grip the dolly 20 for operation but also functions to control cargo. Therefore, depending on the size and height of the cargo to be loaded, a very long single pipe, e.g., 150 cm or 180 cm in length, may be erected on the loading platform 18 of the dolly 20. In such cases, it is natural to grip the middle portion of the single pipe push bar 11 rather than the upper end to operate the dolly 20. The grip protector 10 of embodiment 4 is configured to be attached to the middle portion of the push bar 11 so as to accommodate such usage.

[0057] In the grip protector 10 of the fourth embodiment, the upper support part 3 is annular like the lower support part 5, rather than a top plate, and does not include an insertion part 4. As shown in FIG. 32, the insertion part 4 can also be configured to be detachable from the upper support part 3. The grip protector 10 of this example can be used as in the first embodiment described above when the insertion part 4 is attached, and can be used as in the fourth embodiment when the insertion part 4 is detached. As shown in FIG. 32, the insertion part 4 is preferably fitted from below into the portion corresponding to the top plate of the upper support part 3 and fixed upward. The portion corresponding to the top plate of the upper support part 3 has an opening through which a single-tube push rod 11 can pass, and the insertion part 4 has a portion (upper) that fits into the opening and a portion (lower) that is inserted inside the push rod 11. A portion that protrudes outward is provided at the top of the insertion part 4, and a recess is provided in the opening of the upper support part 3 into which the protruding portion fits. This allows the insertion portion 4 to be configured so as to be detachable from the upper support portion 3 without using any additional parts.

[0058] The upper support 3 and the lower support 5 can be attached to the push bar 11 in a variety of ways, as described below.

[0059] For example, a stopper 7 can be attached to the push bar 1. FIG. 33 is a front view showing a schematic configuration example of the attachment mechanism, and FIG. 34 is an explanatory diagram of the stopper 7 that constitutes this attachment mechanism. As shown in FIG. 33, by attaching the stopper 7 to a position below the lower support part 5 of the push bar 11, the grip protector 10 is secured so as to prevent it from slipping down due to its own weight, while still allowing it to be moved manually. In this case, the stopper 7 is made of an elastic material such as hard rubber, and can be cylindrical, for example, as shown in FIG. 34, with an opening smaller than the outer diameter of the push bar 11, which is a single tube. When fitted into the push bar 11, this stopper 7 is firmly fixed in contact with the outer periphery of the push bar 11, and can support the grip protector 10 so that it does not slip down due to its own weight.

[0060] Furthermore, for example, at least one of the upper support part 3 and the lower support part 5 is made of an elastic material such as hard rubber and is formed slightly smaller than the outer diameter of the push bar 11, so that it adheres closely to the outer surface of the push bar 11 and fixes the grip protector 10 so that it does not slip off due to its own weight, while still allowing the attachment position to be moved manually.

[0061] Alternatively, the inner diameters of the upper support part 3 and the lower support part 5 may be formed larger than the outer diameter of the push bar 11, and they may be fixed to the push bar 11 by an attachment mechanism (not shown). Various mechanisms can be used as the attachment mechanism. For example, the attachment mechanism may be a mechanism that is attached to the push bar 11 and supports the grip protector 10 from below. Alternatively, the attachment mechanism may be a mechanism that provides screws from the outer periphery of the upper support part 3 and the lower support part 5 to the inner periphery, and by screwing them in, presses the tips against the outer periphery of the push bar 11 to fix them.

[0062] The configuration other than the upper support part 3, the lower support part 5, the inserted part 4, and the mounting mechanism is the same as in the first embodiment, so a detailed description will be omitted. Also, like the first embodiment, the number, angle, width, thickness, material, cross-sectional structure, etc. of the vertical beams and horizontal beams can be selected in various ways.

[0063] This allows the grip protector 10 to be attached at any height, regardless of the length of the push bar 11. The position at which the grip protector 10 is attached can also function as a guide for measuring the height of the cargo to be loaded. For example, at a site where there are rules regarding the loading height or the height at which the push bar is grasped, the attachment position of this grip protector 10 can serve as a guide.

[0064] [Embodiment 5] The grip protector 10 of the present invention may be attached directly to the push bar 11. Since it is integrated with the push bar 11, it may also be called the grip protector 10. In this specification, the form that is integrated with the push bar 11 is generally called the grip protector, but the same reference numeral 10 is used and the terms are sometimes used interchangeably. Furthermore, it can be attached to any position, not just the top end of the push bar 11. By configuring the push bar 11 itself to be rotatable, the direction in which the hand is inserted into the grip protector 10 and the direction in which the hand is protected can be adjusted.

[0065] 25 to 30 are six-view diagrams schematically illustrating a fifth configuration example of the grip protector 10 of the present invention. In Fig. 25 to Fig. 30, the push bar 11 is depicted as a single pipe, including the periphery of its upper end. Fig. 25 is a front view, Fig. 26 is a top view, Fig. 27 is a rear view, Fig. 28 is a bottom view, Fig. 29 is a right side view, and Fig. 30 is a left side view.

[0066] In the grip protector 10 of this fifth embodiment, the upper and lower ends of the vertical beams 1 are attached to the outer periphery of the push bar 11, and the upper support part 3 and the lower support part 5 refer to the connection parts. The inserted part 4 is not provided. The attachment (connection) means is optional. For example, the vertical beams 1 and the horizontal beams 2 are all made of metal such as iron and welded to the push bar 11, which is a single iron pipe.

[0067] By integrating it with the push bar 11 and making it out of iron, it can be made to have high strength. The configuration other than the upper support part 3, lower support part 5, inserted part 4 and mounting mechanism is the same as in embodiment 1, so a detailed description will be omitted. Also, like embodiment 1, the number, angle, width, thickness, material, cross-sectional structure, etc. of the beams can be selected from a variety of options.

[0068] The invention made by the inventor has been specifically described above based on an embodiment, but it goes without saying that the invention is not limited thereto and can be modified in various ways without departing from the spirit of the invention. [Explanation of symbols]

[0069] 1 Longitudinal beam 2 crossbeam 3 Upper support part (top plate) 4 Interpolation part 5 Lower support part 6 Outer cylinder 7 Stopper 10 Grip protector (grip protector) 11 Push stick 18 Cargo bed 19 wheels 20 carts

Claims

1. A grip protector that can be attached to a push bar erected at at least one of the four corners of a cart, the grip protector having an upper support part, a lower support part, three or more longitudinal beams, and one or more transverse beams, the upper support is attached above the push bar; The lower support portion is attached to the push bar below the upper support portion, Each of the three or more vertical beams has an upper end connected to the upper support portion and a lower end connected to the lower support portion, and extends in a direction away from the push bar at a central portion, Each of the one or more cross beams is connected to all of the longitudinal beams from one longitudinal beam to another longitudinal beam; All of the vertical beams connected by the one or more horizontal beams are arranged radially from the push bar so that the angle between the vertical beam to which one end of the horizontal beam is connected and the vertical beam to which the other end of the horizontal beam is connected is 90° or more when viewed from above. Grip protection.

2. In claim 1, each of the three or more longitudinal beams is semicircular or semielliptical. Grip protection.

3. In claim 1, the push rod is a single pipe, The upper support portion has an insertion portion inserted into the single pipe that is the push rod and a top plate that covers the upper end surface of the single pipe, and the upper ends of the three or more vertical beams are connected to the top plate, The lower support portion is annular and contacts the outer peripheral surface of the single pipe which is the push rod. Grip protection.

4. In claim 1, the push rod is a single pipe, The upper support portion has an outer cylinder portion that covers the periphery of the single pipe that is the push bar, and a top plate that covers the upper end surface of the single pipe, and the upper ends of the three or more vertical beams are connected to the top plate, The lower support portion is annular and contacts the outer peripheral surface of the single pipe which is the push rod. Grip protection.

5. The push bar erected at at least one of the four corners of the cart is a single pipe, The grip protector according to any one of claims 1 to 4 is attached to the push bar. Cart.

6. A long hand bar that can be erected at at least one of the four corners of a cart, the hand bar having a grip protector that has an upper support part, a lower support part, three or more longitudinal beams, and one or more transverse beams; the upper support portion is a member attached to an upper portion of the push bar or to an upper end of the push bar, the lower support portion is a portion below the upper support portion or a member attached to the push bar, Each of the three or more vertical beams has an upper end connected to the upper support portion and a lower end connected to the lower support portion, and extends in a direction away from the push bar at a central portion, Each of the one or more cross beams is connected to all of the longitudinal beams from one longitudinal beam to another longitudinal beam; All of the vertical beams connected by the one or more horizontal beams are arranged radially from the push bar so that the angle between the vertical beam to which one end of the horizontal beam is connected and the vertical beam to which the other end of the horizontal beam is connected is 90° or more when viewed from above. Push stick.

7. In the grip protection part of claim 6, each of the three or more longitudinal beams is semicircular or semielliptical. Push stick.

8. The grip protector of claim 6, The upper support portion is attached to the upper end surface of the push bar and is a substantially circular or polygonal plate to which the upper ends of the three or more vertical beams are connected, The lower support portion is annular and in contact with the outer circumferential surface of the push bar. Push stick.

9. A push bar according to any one of claims 6 to 8 is attached. Cart.

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