Box-shape structure handling carriage

Abstract

To provide a handling carriage capable of freely adjusting a pitch between two bolts installed in the handling carriage in accordance with a change in position of a fastening hole for a box-shape structure.SOLUTION: A handling carriage according to the present invention is a pair of handling carriages in a rectangular shape in plan view which forms a main skeleton by a convex member and a concave member combined therewith from the lower side. A notch groove portion is provided in a longer-side direction in an upper surface that is a convex portion of the convex member in the handling carriage that mainly carries a box-shape structure. Moreover, a bolt insertion window into which a bolt with a head can be inserted is provided in the notch groove portion. The box-shape structure is fastened to the pair of handling carriages by the bolt with a head inserted through the bolt insertion window and by a nut engaged with the bolt with a head from the box-shape-structure side.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a transport vehicle for transporting a box-shaped structure, and more particularly to a transport vehicle for transporting a heavy and tall box-shaped structure such as a control panel. [Background technology]

[0002] Regarding a transport cart for transporting a box-shaped structure, Patent Document 1 states in paragraph 0012 that "the transport cart is a transport cart that transports an object supported on the upper part of a support part, such as a car floor 1, which is a large structure provided in an elevator," and in paragraph 0013 that "as shown in Figure 1, the car floor 1 is fixed onto a pair of support members 2 by a bolt 9a inserted into a fixing hole 8 formed in the upper part 2a of the support member 2 and a nut 9b that screws onto this bolt 9a." [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2018-177150 Summary of the Invention [Problem to be solved by the invention]

[0004] However, Patent Document 1 only describes that the transport cart and the car floor 1, which is a large structure, are fixed to a pair of support members 2 by bolts 9a inserted into fixing holes 8 provided in the transport cart and the car floor 1 and nuts 9b screwed onto these bolts 9a, and does not describe how to align the fixing holes 8 of the heavy car floor 1 with the fixing holes 8 of the transport cart.

[0005] Furthermore, from Figures 1 and 3 of Patent Document 1, it is understood that the fixing holes 8 are small holes, and therefore it would be difficult to align the fixing holes 8 of the car floor 1 with the fixing holes 8 of the transport car. Furthermore, the dimensions of the car floor 1 are not fixed depending on the application of the elevator, and the spacing between the fixing holes 8 of the car floor 1 also needs to be changed. For this reason, it may be inappropriate to determine the spacing between the two fixing holes 8 of the car floor 1 to be the same as the spacing between the two fixing holes 8 provided on the transport car.

[0006] Therefore, an object of the present invention is to provide a transport cart that can freely adjust the spacing between two bolts installed on the transport cart in accordance with changes in the position of the fixing holes in the box-shaped structure. [Means for solving the problem]

[0007] (1) According to the present invention, the above problems are solved as follows. A pair of transport carts that are rectangular in plan view and form a main skeleton with a convex member and a concave member that is combined with the convex member from below, the transport cart being used mainly to transport box-shaped structures, the convex upper surface of the convex member being provided with a notched groove along the long side direction, and the notched groove is further provided with a bolt insertion window into which a headed bolt can be inserted, This transport cart is characterized in that the box-shaped structure is fixed to a pair of the transport carts by the headed bolt inserted through the bolt insertion window and a nut threaded onto the headed bolt from the box-shaped structure side.

[0008] (2) In the above item (1), the bolt insertion window is rectangular, and the head of the headed bolt is rectangular.

[0009] (3) In the above item (1), the recess of the concave member is provided with a flat bar on only one side.

[0010] (4) In the above item (1), the nut is a wing nut.

[0011] (5) In the above item (1), the box-shaped structure is a control panel.

[0012] (6) In the above item (1) or (5), the bottom surface of the box-shaped structure has a bolt shank window portion for receiving the bolt shank of the headed bolt. [Effects of the Invention]

[0013] With the transport cart according to the present invention, when fixing a heavy, tall box-shaped structure such as a control panel to the transport cart, even if the position of the fixing point of the box-shaped structure changes depending on the weight, shape, etc. of the box-shaped structure, the position of the bolt on the transport cart can be adjusted to match the changing position of the fixing point. Note that the box-shaped structure refers to box-shaped structures, mainly made of steel, such as distribution boards and panel boards, in addition to control panels. [Brief explanation of the drawings]

[0014] [Figure 1] FIG. 1(a) is a front view of a transporting cart according to the present invention, FIG. 1(b) is a plan view, and FIG. 1(c) is a side view. [Figure 2] FIG. 2(a) is a front view of the convex member that constitutes the transport cart shown in FIG. 1, and FIG. 2(b) is a plan view. [Figure 3] FIG. 3(a) is a front view of the concave member that constitutes the transport cart shown in FIG. 1, and FIG. 3(b) is a plan view. [Figure 4] FIG. 4(a) is a front view of the flat bar used in the transport cart shown in FIG. 1, and FIG. 4(b) is a plan view. [Figure 5] FIG. 5(a) is a front view of the transporting cart and the box-shaped structure (control panel) fixed to the transporting cart according to the present invention, FIG. 5(b) is a side view, and FIG. 5(c) is a bottom view. [Figure 6] FIG. 5(c) is an enlarged view of the bottom view of FIG. [Figure 7] FIG. 10 is a reference diagram showing the state in which the control panel is lifted and the transport cart is positioned under the control panel. DETAILED DESCRIPTION OF THE INVENTION

[0015] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of a transporting cart according to the present invention will be described with reference to the drawings. In each drawing, the same parts are designated by the same reference numerals.

[0016] Fig. 1 shows a transport cart according to the present invention, and as shown in the front view of Fig. 1(a) and the side view of Fig. 1(c), it mainly comprises a convex member 11 having a convex portion on the top and a concave member 12 having a concave portion on the bottom. As the convex member 11 is shown in Fig. 2 and the concave member 12 is shown in Fig. 3, the explanation will start with Figs. 2 and 3.

[0017] As shown in Figures 2(a) and 3(a), a simple yet strong framework for a transport cart can be constructed using a small amount of material by fitting concave member 12 from below inside the convex portion of convex member 11. To integrate convex member 11 and concave member 12, three tapped holes 21 with female threads are provided on one side as shown in Figure 3(b), and three drilled bolt holes 22 are provided on one side as shown in Figure 2(b), and they are fastened together at a total of six points on both sides with bolts and nuts 31 (see Figure 1).

[0018] As shown in FIG. 2(b), a notched groove 15 is formed along the long side in the center of the upper surface, which is the convex portion. This notched groove 15 is formed by cutting out a groove of a certain width along the long side of the upper surface, which is the convex portion of the convex member 11. A headed bolt 34 for fixing the box-shaped structure 100 to the transport cart 1 is installed in this notched groove 15. It is preferable that the width of the notched groove 15 is larger than the diameter of the bolt shaft 35 of the headed bolt 34 so that the installed headed bolt 34 can move freely within the notched groove 15. Note that a headed bolt refers to a bolt with a head such as a hexagonal, round head, or countersunk head.

[0019] Furthermore, the cutout groove 15 is provided with a bolt insertion window 16 so that a headed bolt 34 can be inserted into the cutout groove 15. This bolt insertion window 16 preferably has a shape that allows the head of the headed bolt 34 to pass through. For example, if the head is rectangular, the bolt insertion window 16 is also rectangular, and if the head is circular, the bolt insertion window 16 is also circular.

[0020] The convex member 11 and the concave member 12 are usually made of general structural rolled steel (SS material). For example, a 2.3 mm plate is bent using a bending machine and then painted with urethane paint, such as 5R 4 / 14, using a spray gun, brush, or roller. Aluminum alloy or engineering plastic plate materials may also be used to omit painting.

[0021] 4(a) is a front view of the flat bar 13, and FIG. 4(b) is a plan view. As shown in FIG. 1(a), only one flat bar 13 is used in the recess of the concave member 12. The flat bar 13 is provided with a caster tap hole 23 having a female screw thread, and the flat bar 13 is fixed to the concave member 12 by a caster bolt 32 used to fix the caster 50 to the concave member 12. This flat bar 13 is used not only to increase the strength of the transport cart 1, but also to make it easier for the head of the headed bolt 34 to slide along the flat bar 13 when moving the headed bolt 34 to a predetermined position within the cutout groove portion 15 of the convex member 11, as will be described later.

[0022] Here, the procedure for positioning the headed bolt 34 at a predetermined position within the notched groove portion 15 will be described with reference to Figure 1. In this embodiment, two headed bolts 34 are installed on one transport cart 1. The headed bolts 34 used have rectangular heads. The bolt insertion window portion 16 also has a rectangular shape.

[0023] First, grasp the wing nut 36 of the headed bolt 34 by hand and insert the head of the headed bolt 34 into the bolt insertion window 16 shown in Figure 1(b). After inserting the head, rotate this head by 90°. As shown in Figure 1(a), the recess of the concave member 12 of the transport cart 1 has a flat bar 13 on only one side, and when the head is rotated by 90°, the short side of the rectangular head comes into contact with the flat bar 13. Next, slide the headed bolt 34 along the flat bar 13 within the notched groove 15 to the position where it interfaces with the box-shaped structure 100. The headed bolt 34 can be easily slid along the flat bar 13. The remaining headed bolt 34 is positioned within the notched groove 15 using the same procedure.

[0024] As shown in Figures 1(a), (b), and (c), one caster 50 is attached to each of the front and rear ends of the transport cart 1. A typical commercially available caster 50 can be used. For example, MISUMI model CSHNS50A-N. The caster 50 includes a resin wheel 51, a stopper 52 that stops the wheel from rotating, and a support part 53 that forms the outside of the caster.

[0025] 5(a) shows a front view, FIG. 5(b) shows a side view, and FIG. 5(c) shows a bottom view of a control panel 100, which is a box-shaped structure fixed to a transport cart 1. The dimensions of the control panel 100 are, for example, 2300 mm high, 1600 mm wide, 500 mm thick, and weigh approximately 400 kg.

[0026] As shown in Figures 5(a) and 5(b), the control panel 100 can be easily moved on a flat floor by attaching a pair of transport carts 1 to both ends of the bottom surface of the control panel 100 with head bolts 34 and wing nuts 36. When MISUMI model CSHNS50A-N casters are used, the allowable load per caster is 200 daN (= 200 kgf). Since two casters are used per transport cart, for a total of four casters per pair of transport carts, the total allowable load is 800 daN (= 800 kgf), and even with a safety factor of 0.7, this comes to 560 kgf, so the load of the control panel 100, which weighs approximately 400 kg, is not a problem.

[0027] FIG. 6 is an enlarged bottom view of the control panel 100 shown in FIG. 5(c). A pair of transport carts 1 are attached to both ends of the bottom surface of the control panel 100. Reference numeral 106 denotes bolt shaft windows 106 provided on the bottom surface of the control panel 100, which are openings for receiving the bolt shafts 35 of the headed bolts 34 installed in the notched grooves 15 of the transport cart 1. Note that before aligning the bolt shafts 35 with the bolt shaft windows 106, the wing nuts 36 are removed from the headed bolts 34. The bolt shaft windows 106 are provided at two locations on one side of the bottom surface of the control panel 100, for a total of four locations on both sides. The transport carts 1 can be easily attached to the control panel 100 by manually rotating the wing nuts 36 onto the bolt shafts 35 from the control panel 100 side after aligning the bolt shafts 35 with the bolt shaft windows 106.

[0028] 7 shows the state in which the control panel 100 is lifted and a pair of transport carts 1 is positioned below the control panel 100. Using the four lifting fittings 105 on the top of the control panel 100, the control panel 100 is lifted by an electric hoist 110 with a four-point sling, and the pair of transport carts 1 are placed underneath it, and the four bolt shafts 35 of the headed bolts 34 installed in the notched grooves 15 of the transport carts 1 are aligned with the four bolt shaft windows 106 provided on the bottom surface of the control panel 100.

[0029] Next, the electric hoist is operated to lower the lifted control panel 100, so that the four bolt shafts 35 are inserted into the four bolt shaft windows 106. In this state, the wing nuts 36 are manually rotated onto the bolt shafts 35 from the control panel 100 side, thereby fixing the control panel 100 to the transport cart 1. Finally, the four-point lifting sling is removed from the lifting fittings 105, allowing the control panel 100 to be moved to the specified position.

[0030] While the embodiments of the present invention have been described above, the following modifications and variations can be made to the above embodiments without departing from the spirit of the present invention. Furthermore, the respective components in the above embodiment of the present invention and the following variations can also be combined as appropriate.

[0031] The transport cart may be a wide rectangle or a square in shape, other than a rectangle in plan view, and may have two or more rows of notched grooves. Three or more transport carts may be used to move a box-shaped structure. Furthermore, three or more headed bolts may be provided in the notched grooves.

[0032] A single transport cart is used to move the box-shaped structure. This transport cart is a horizontally long rectangle, and may be equipped with four or more casters and have two or more rows of cutout grooves. Two or more flat bars may be provided in the recess of the concave member. Furthermore, the nuts used to secure the transport cart to the box-shaped structure may be common nuts such as hex nuts. [Explanation of symbols]

[0033] 1 Transport cart 11 Convex member 12 concave member 13 Flat Bar 15 Notched groove 16 Bolt insertion window 21 Tapped holes 22 bolt holes 23 Tapped holes for casters 24 Caster bolt holes 31 Bolts and nuts 32 Caster bolt 33 Caster bolts and nuts 34 Headed bolt 35 bolt shaft 36 Wing nut 50 Caster 51 Wheels 52 Stopper 53 Support part 100 Box-shaped structure (control panel) 105 Hanging hardware 106 Bolt shaft window 110 Electric Hoist

Claims

1. A pair of transport carts that are rectangular in plan view and form a main skeleton with a convex member and a concave member that fits onto the convex member from below, wherein the transport cart that mainly transports box-shaped structures has a notched groove formed along the long side direction on the top surface that is the convex portion of the convex member, and further has a bolt insertion window formed in the notched groove into which a headed bolt can be inserted; A transport cart characterized in that the box-shaped structure is fixed to a pair of the transport carts by the headed bolt inserted through the bolt insertion window and a nut threaded onto the headed bolt from the box-shaped structure side.

2. 2. The transport vehicle according to claim 1, wherein the bolt insertion window is rectangular, and the head of the headed bolt is rectangular.

3. 2. The transporting cart according to claim 1, wherein a flat bar is provided on only one side of the recess of said concave member.

4. 2. The transport vehicle according to claim 1, wherein the nuts are wing nuts.

5. 2. The transport vehicle according to claim 1, wherein the box-shaped structure is a control panel.

6. 6. A transport vehicle according to claim 1 or 5, wherein the bottom surface of said box-shaped structure has a bolt shaft window portion for receiving the bolt shaft of said headed bolt.

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