Jig for stacking, stacking method of carriage, and conveyance method

Abstract

To save labor and reduce a work time by eliminating a labor of stacking a material to a carriage after the material is carried to a construction site or the like by a transportation vehicle.SOLUTION: An upper end portion of a pipe 21 erected from a corner portion of a carriage 1A with a luggage B placed on a placement surface is inserted into a reception part 12 of a jig 10 for stacking, then, a lower portion of a socket 3 provided in a corner portion of the other carriage 1B with a luggage B placed on a placement surface is inserted to a pedestal part 14 of the jig 10 for stacking, and the other carriage 1B on which the luggage B is placed is stacked on the carriage 1A on which the luggage B is placed.SELECTED DRAWING: Figure 16

Description

Technical Field

[0001] The present invention relates to a stacking jig, a method for stacking carts, and a transportation method.

Background Art

[0002] In recent years, for example, in order to reduce the number of workers at construction sites and reduce labor at the site, parts, members, housings, etc. are assembled to a certain extent in advance in factories or warehouses and unitized, and then carried into the site.

[0003] In this case, conventionally, when transporting such unitized materials to the site, for example, as disclosed in Patent Document 1, a transportation pallet provided with a placement portion on the upper surface where materials can be placed and an insertion portion on the side surface where a fork of a forklift or the like is inserted is used. After placing the materials on the pallet, the pallet together with the materials is loaded onto the loading platform of a transport vehicle such as a transport truck by a forklift.

[0004] The pallet on which the materials are placed is transported to the construction site by a transport vehicle, and then unloaded from the loading platform of the transport vehicle by a forklift waiting at the site. Usually, for example, it is transported to a predetermined stacking place and then from the stacking place to the site where the materials are used. In some cases, it may be transported directly to the site immediately after being unloaded from the loading platform of the transport vehicle.

[0005] In any case, when transporting the materials to the site where they are used, the materials are once unloaded from the pallet at the stacking place, reloaded onto a cart for transportation to the site where they are used, and the worker pushes the cart for transportation. At the site where they are used, the worker unloads the materials from the cart and uses them. This is because there are often steps at the construction site, and it is difficult to handle and transport the materials while they are on the pallet.

Prior Art Documents

Patent Documents

[0006]

Patent Document 1

SUMMARY OF THE INVENTION

PROBLEMS TO BE SOLVED BY THE INVENTION

[0007] As described above, after being unloaded from the loading platform of a transport vehicle such as a transport truck by a forklift waiting at the site, in order to transport the materials to the site where they are used, it is ultimately necessary to transfer them to a trolley, which is time-consuming and requires a corresponding amount of time.

[0008] The present invention has been made in view of such points, and for example, after being transported to a construction site by a transport vehicle, it aims to save the labor of transferring materials to a trolley and to achieve labor saving and shortening of working hours.

MEANS FOR SOLVING THE PROBLEMS

[0009] To achieve the above object, the present invention is a stacking jig used when stacking trolleys in the vertical direction, having a plurality of receiving portions into which the upper end portions of pipes provided at each corner portion of the trolley can be inserted and received at a predetermined position, and a frame connecting the receiving portions to each other. A pedestal portion is provided above each receiving portion, and the pedestal portion is capable of receiving the lower portion of a socket provided at the corner portion of the trolley into which the lower end portion of the pipe is inserted.

[0010] The jig according to the present invention, for example, inserts the upper end portion of a pipe rising from the corner portion of a trolley with a load placed on the mounting surface into the receiving portion of the stacking jig, and then inserts the lower portion of a socket provided at the lower portion of the corner portion of another trolley with a load placed on the mounting surface into the pedestal portion of the stacking jig. Thereby, the lower trolley and the upper trolley are connected by the pipe. Therefore, the trolleys can be stacked vertically while having loads such as materials placed thereon. When inserting the lower portion of the socket provided at the lower portion of the corner portion of another trolley with a load placed on the mounting surface into the pedestal portion, for example, a forklift can be used.

[0011] According to the present invention, since the carts loaded with goods can be stacked vertically, they can be stored as they are, for example, in a warehouse as described later. When storing, it is not necessary to transfer them to a pallet. And at the destination, the cart with the goods loaded can be moved as it is, for example, to the site where it is to be used. Therefore, of course, it is not necessary to perform the transfer work to the cart at the site where it is used. More specifically, examples of the goods here include the materials used at the construction site as described above, such as panels, pipe materials, various air-conditioning equipment used at the equipment construction site, and their constituent members. Of course, these materials and constituent members are not limited thereto.

[0012] The inner diameter of the receiving portion of the pedestal portion may be configured to become smaller toward the bottom. This makes it easy to guide the socket portion of the cart to a predetermined position.

[0013] The stacking method of the cart according to the present invention is a method of stacking the carts loaded with goods in the vertical direction using the above-described stacking jig. The upper end of the pipe rising from the corner portion of the cart with the goods placed on the placement surface is inserted into the receiving portion of the stacking jig, and then the lower portion of the socket provided at the lower portion of the corner portion of another cart with the goods placed on the placement surface is inserted into the pedestal portion of the stacking jig.

[0014] To insert the upper end of the pipe rising from the corner portion of the cart with the goods placed on the placement surface into the receiving portion of the stacking jig, for example, it can be realized by the operator inserting the pipe into the receiving portion while lifting the stacking jig. Then, lift another cart with the goods placed on the placement surface with a forklift or the like, and place the lower portion of the socket provided at the lower portion of the corner portion of the other cart into the pedestal portion of the stacking jig set on the previous cart. This makes it possible to preferably stack the carts loaded with goods in the vertical direction.

[0015] In such a method, when the lower end of the pipe is inserted into the socket, a support portion for preventing the pipe from dropping may be provided on the pipe. As the support portion in this case, for example, an annular large-diameter portion larger than the outer diameter of the pipe may be formed at the lower portion of the pipe, or may be fixed to the outer periphery of the pipe.

[0016] Also, when the lower end of the pipe is inserted into the socket, a support portion for preventing the pipe from dropping may be provided on the socket. For example, a support body may be fixed to the bottom of the socket portion of the cart so as to receive the lower surface of the pipe with the support body.

[0017] Furthermore, a mark indicating that the upper end of the pipe has been inserted into the receiving portion and received at a predetermined position may be provided on the outer periphery of the pipe.

[0018] And as a method for transporting goods, a transportation method can be proposed, which is characterized in that the stacked carts with goods placed thereon are stored in the facility by the above-described method of stacking the carts, and when transporting to the destination, the stacked state is released, and the carts with goods placed thereon are loaded onto a transport vehicle. Here, the facility referred to herein means, for example, a warehouse, a factory, or the like.

[0019] According to such a transportation method, in the process of transporting the target goods from the shipping place to the destination place and transporting the goods to a predetermined use place or the like by cart at the destination place, labor saving and labor reduction can be achieved more than before. For example, a unit assembled in a factory-cum-warehouse as a shipping place is loaded onto a cart, and this is directly loaded onto a transport vehicle, and at the destination place, the goods together with the cart are unloaded and directly moved to the site.

[0020] Moreover, when storing at the shipping place, since the carts with goods loaded thereon are stacked in the vertical direction without using conventional pallets, the floor exclusive area at the shipping place can be suppressed and efficient storage can be achieved.

Effects of the Invention

[0021] According to the present invention, for example, after materials are transported to a construction site by a transport vehicle, the dolly can be unloaded from the transport vehicle, and workers can push the dolly to the location of use without having to transfer the materials onto the dolly. Therefore, there is no need to transfer the materials onto the dolly each time as in the past. This results in less labor and shorter work time than in the past. Furthermore, according to the present invention, the carts can be stacked one on top of the other while the materials or other cargo remains loaded on them, thereby reducing the floor space required for storing the cargo. [Brief explanation of the drawings]

[0022]

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Embodiment for Carrying out the Invention

[0023] Hereinafter, embodiments will be described with reference to the drawings. FIG. 1 shows a cart 1 used in the embodiment. This cart 1 has a typical structure of a cart called a single-pipe cart or a pipe cart. The frame 2 of this cart 1 adopts a rectangular frame structure composed of four frame members 2a, 2b, 2c, and 2d. The upper surface of the frame 2 constitutes the placement surface of the cart 1.

[0024] A socket 3 is provided on the underside of each of the four corners of the frame 2. The socket 3 is cylindrical, and its upper opening communicates with a circular pipe insertion port 4 formed in each of the four corners of the frame 2.

[0025] Casters 5 are attached to the undersides of the long frame members 2b and 2d of the frame members 2a, 2b, 2c, and 2d of the frame 2. In this embodiment, two casters 5 are attached to the undersides of each of the frame members 2b and 2d by means of attachment members 5a.

[0026] 2 shows a stacking jig 10 according to an embodiment of the present invention. This stacking jig 10 has a rectangular frame 11 made up of four frame members 11a, 11b, 11c, and 11d. A cylindrical receiving portion 12 is provided at each corner of the frame 11. That is, in this embodiment, the four receiving portions 12 are connected and supported by the four frame members 11a, 11b, 11c, and 11d. The fixing of the receiving portions 12 to the frame 11 is reinforced by a reinforcing member 13.

[0027] A base 14 is provided at the top of the receiving section 12. As shown in FIG. 3, the base 14 has an open top and the inside forms a receiving section 14a. The bottom 14b of the receiving section 14a is flat. The inner diameter of the receiving section 14a itself decreases toward the bottom 14b. That is, the inner diameter of the receiving section 14a increases toward the opening on the top. The lower part of the receiving section 12 has an expanded diameter section 15 whose diameter increases toward the bottom end.

[0028] Next, a stacking method according to an embodiment using the above-mentioned dolly 1 and stacking jig 10 will be described. First, as shown in Fig. 5, construction materials, for example, are placed as the target cargo B on the upper surface of frame 2, which is the loading surface of cart 1A shown in Fig. 4. Cart 1A is the cart that will be located at the bottom when the carts are stacked.

[0029] Next, as shown in Figure 6, the lower portions of the pipes 21 are inserted into the pipe insertion ports 4 provided at the corner portions of the bogie 1A, and the pipes 21 are installed upright at the corner portions of the bogie 1A. As shown in Figure 7, annular supports 22 are fixed to the lower portions of the pipes 21 so that the load on the pipes 21 can be supported by the bogie 1A. Therefore, when the pipes 21 are inserted through the pipe insertion ports 4 and into the sockets 3, the supports 22 of the pipes 21 are engaged with the upper surface of the frame 2 of the bogie 1A, as shown in Figure 7. This allows the load on the pipes 21 to be supported by the bogie 1A, preventing the pipes 21 from falling.

[0030] As a configuration for allowing the bogie 1A to bear the load on the pipe 21, instead of or in addition to fixing the support part 22 to the outer periphery of the pipe 21, another type of support part 23 may be fixed to the bottom of the socket 3 as shown in Figures 8 and 9. In this way, when the pipe 21 is inserted through the pipe insertion opening 4 and into the socket 3, the bottom of the pipe 21 will abut against and be received by the support part 23, and as a result the load on the pipe 21 can be borne by the bogie 1A via the socket 3, preventing the pipe 21 from falling.

[0031] After the pipes 21 have been inserted into the corners of the cart 1A in this manner and erected, the stacking jig 10 is set on top of the pipes 21 of the cart 1A as shown in Fig. 10. This operation is performed, for example, by a worker lifting the stacking jig 10 and inserting the upper ends of the pipes 21 protruding from the corners of the cart 1A into the receptacles 12 at the corners of the stacking jig 10. At this time, the lower ends of the receptacles 12 are provided with enlarged diameter sections 15, making it easy to insert the upper ends of the pipes 21 into the receptacles 12. Fig. 11 shows the stacking jig 10 set on top of the pipes 21 of the cart 1A.

[0032] When setting the stacking jig 10 on each pipe 21 of the carriage 1A, as shown in Fig. 12, the pipe 21 is inserted until the upper end of the pipe 21 abuts against the ceiling part in the receiving part 12. Thereby, the upper end part of the pipe 21 is received at a predetermined position. At this time, by attaching a mark M to the outer periphery of the pipe 21, when the mark M reaches the lower end of the receiving part 12, in this example, the lower end of the enlarged diameter part 15, it can be known that the upper end part of the pipe 21 has been received at a predetermined position (in this example, the ceiling part in the receiving part 12). Also, when the mark M has not reached the lower end of the receiving part 12 (the lower end of the enlarged diameter part 15), there will be a gap between the upper end part of the pipe 21 and the ceiling part in the receiving part 12. Since having a gap makes it unstable, attaching the mark M in this way is a means to easily know whether the stacking jig 10 has been correctly and stably set on the pipe 21.

[0033] Regarding the carriage 1B stacked on the upper side of the carriage 1A, as shown in Fig. 13, a load B such as a material is stacked on the frame 2 serving as the mounting surface, and the pipe 31 is set at a predetermined position. In this example, since there is no plan to stack another carriage on the carriage 1B, a pipe 31 having a lower height than the pipe 21 erected on the carriage 1A is used. The pipes 21 and 31 used for this type of carriage are originally used as gripping bars when pushing the carriage by hand. From this point of view, the pipe 31 may be of an inverted U shape having a horizontal pipe that serves as a convenient hand-holding part extending in the horizontal direction when pushing the carriage 1B by hand.

[0034] After loading the load B on the carriage 1B stacked on the upper side of the carriage 1A and setting the pipe 31, for example, lift the carriage 1B together with the load B using a forklift or the like, and as shown in Fig. 14, insert the socket 3 on the lower surface side of the carriage 1B into the pedestal part 14 of the stacking jig 10 set on the pipe 21 of the carriage 1A as it is.

[0035] 12, the inner diameter of receiving portion 14a of base 14 decreases toward bottom 14b. That is, the entrance opening surface of receiving portion 14a is larger than bottom 14b, making it easier to receive socket 3 on the underside of carriage 1B. Furthermore, because receiving portion 14a is tapered toward bottom 14b, socket 3 of carriage 1B that enters through the entrance opening surface of receiving portion 14a is guided to a predetermined position on bottom 14b, and socket 3 inserted into base 14 is stably set at a predetermined position within base 14.

[0036] 15 and 16 show the state in which dolly 1B carrying cargo B is stacked on top of dolly 1A carrying cargo B. If dolly 1B is stored in this state in a designated space in a warehouse or factory, for example, it is possible to save floor space and store cargo B efficiently. When cargo B is to be transported to a construction site or the like, the stacked state is removed, and dollies 1A and 1B carrying cargo B are loaded onto a transport vehicle. Furthermore, once safety can be confirmed, stacked carts 1A and 1B with cargo B loaded thereon can be loaded onto a transport vehicle and transported in that state to a construction site or the like. Once transported to a construction site or the like, cart 1B can be unloaded from the loading platform of the transport vehicle while still stacked on top of cart 1A, or cart 1B can be unloaded first, and then cart 1A can be unloaded. In either case, at the site, carts 1A and 1B can be immediately moved to the designated location with cargo B, such as materials, loaded thereon, eliminating the need for the conventional process of transferring materials from pallets to carts. This results in less manpower and less energy required than in the past.

[0037] Furthermore, even when the cargo is not immediately shipped or used on-site but temporarily stored in a warehouse or the like as mentioned above, the cart 1B carrying cargo B can be stacked on top of the cart 1A carrying cargo B and stored, eliminating the need to place cargo B on a dedicated pallet and then stack the pallets as in the past. This also contributes to labor and energy savings. Moreover, because the carts 1A and 1B carrying cargo B are themselves stacked, the floor space required for storage can be saved.

[0038] In the above embodiment, as shown in FIGS. 16 and 17, the height position of the frame 11 of the stacking jig 10 is set such that the lower end surface of the wheel of the caster 5 of the carriage 1B stacked on the upper side is located above the lower end surface Z of the frame 11 of the stacking jig 10. Thereby, the lower end surface of the wheel of the caster 5 of the carriage 1B stacked on the upper side is prevented from contacting the load B placed on the lower carriage 1A, and the load B is protected.

[0039] In the above embodiment, an example in which the carriage 1B on which the load B is placed is stacked on the upper side of the carriage 1A on which the load B is placed is shown. However, for example, as shown in FIG. 17, two carriages 1A located on the lower side are juxtaposed, and these are connected by a connecting tool 41 for example, and then the load B is placed on these two carriages 1A. Similarly, two carriages 1B to be stacked on the upper side may be connected in parallel and then stacked on the two carriages 1A. In this case, since the carriages are connected in parallel and stacked vertically, the stability is increased.

[0040] The stacking jig 10 according to the above-described embodiment has a frame 11 having a rectangular frame structure composed of four frame members 11a, 11b, 11c, and 11d. However, the present invention is not limited to this, and for example, the frame members may be arranged in an H shape in a plan view.

[0041] Furthermore, as another example of the stacking jig 10, for example, the middle parts of two receiving portions 12 are connected by a short frame member 11a to form an H-shaped frame, and similarly, a structure in which the receiving portions 12 are connected by a short frame member 11c is prepared. Then, these are first placed on the upper ends of the pipes 21 of the lower carriage 1A. That is, the two upper ends of the pipes 21 of the lower carriage 1A are inserted into the receiving portions 12, 12 connected by the frame member 11a, and then the two upper ends of the remaining pipes 21 are inserted into the receiving portions 12, 12 connected by the frame member 11c. And then, the long frame members 11b, 11d may be fixed so as to be spanned between the receiving portions 12, 12. According to this, the stacking jig 10 can be easily set on the upper ends of the four pipes 21 erected on the lower carriage 1A. In such a case, the long frame members 11b, 11d may be configured to be lockable between the two receiving portions 12.

[0042] Also, for the carriage 1 used in the above embodiment, a carriage having circular pipe insertion ports 4 formed at four corner portions is used, and accordingly, round pipes are also used for the pipes 21. However, the present invention is not limited to this, and the pipe insertion ports 4 may be square, and accordingly, square pipes may be used for the pipes 21.

Industrial Applicability

[0043] The present invention is particularly useful when transporting various materials at a construction site or the like. In particular, it is particularly useful when parts, members, etc. are assembled in a warehouse-cum-factory to form units, transported to the site, and used at the site. It realizes labor saving and also contributes to saving the floor area dedicated for storage.

Explanation of Reference Numerals

[0044] 1, 1A, 1B Carriage 2 Frame 2a, 2b, 2c, 2d Frame Member 3 Socket 4 Pipe Insertion Port 5 Caster 5a Attachment Member 10 Stacking Jig 11 Frame Frame members 11a, 11b, 11c, 11d 12 Receiving portion 14 Base portion 14a Receiving part 14b Bottom 15 Diameter-expanding portion 21 Pipe 22, 23 Support portions 31 Pipe 41 Connector B Load Mark М

Claims

1. A stacking jig used when stacking carts in the vertical direction, a plurality of receiving portions into which the upper ends of pipes provided at each corner portion of the cart can be inserted and received at a predetermined position, having a frame that connects the receiving portions to each other, a pedestal portion is provided above each of the receiving portions, The stacking jig is characterized in that the pedestal portion can receive the lower portion of a socket provided at the corner portion of the cart into which the lower end portion of the pipe is inserted.

2. The stacking jig according to claim 1, wherein the inner diameter of the receiving portion of the pedestal portion becomes smaller toward the bottom.

3. A method of stacking carts with loads placed thereon in the vertical direction using the stacking jig according to any one of claims 1 to 2, inserting the upper end of a pipe rising from a corner portion of a cart with a load placed on a placement surface, into the receiving portion of the stacking jig, and then inserting the lower portion of a socket provided at the lower portion of a corner portion of another cart with a load placed on the placement surface into the pedestal portion of the stacking jig. The method of stacking carts is characterized by this.

4. The method of stacking carts according to claim 3, wherein a support portion for preventing the pipe from descending is provided on the outer periphery of the pipe when the lower end portion of the pipe is inserted into the socket.

5. The method of stacking carts according to claim 3, wherein a support portion for preventing the pipe from descending is provided on the socket when the lower end portion of the pipe is inserted into the socket.

6. The method of stacking carts according to claim 3, wherein a mark indicating that the upper end of the pipe has been inserted into the receiving portion and received at a predetermined position is provided on the outer periphery of the pipe.

7. Store the stacked carts with loads placed thereon in the facility by the method of stacking carts according to claim 3, When transporting to the destination, the stacked state is released, and the cart with the load placed thereon is loaded onto a transport vehicle. The transportation method is characterized by this.

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