Carriage

Abstract

To provide a carriage, having a foldable column against a carriage body, capable of stabilizing fixing of the column and achieving weight saving.SOLUTION: A carriage 1, structured to insert a column 4 into a column retaining member 50 provided at four corners of a carriage body 2 and made to fold the column 4, is formed to increase an insertion amount by forming a U-shaped hole 4c fitted onto a column receiving shaft 53 for receiving the insertion when the column 4 is inserted into the column retaining member 50.SELECTED DRAWING: Figure 7

Description

[Technical Field]

[0001] The present invention relates to a trolley used for transporting and storing materials, etc., and in particular to a trolley that prevents rattling of the supports provided at the four corners of the trolley body so that materials placed on the trolley do not collapse, and that can also be made lighter by being structurally possible to manufacture using relatively light materials. [Background technology]

[0002] 2. Description of the Related Art Flatbed trucks are commonly used at construction sites, factories, distribution centers, and the like to transport and store materials such as finished products and raw materials.

[0003] This type of platform truck has, for example, four casters attached to the underside of the truck body, which is assembled into a rectangular frame or plate shape, and supports are provided at the four corners of the top surface of the truck body to prevent materials loaded on the truck body from tipping over.

[0004] Such platform trucks have foldable supports that can be folded into the body of the truck, making them compact for transport and storage. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Patent No. 4373302 Summary of the Invention [Problem to be solved by the invention]

[0006] Incidentally, in the flatbed truck described in Patent Document 1, when loading materials, the folded support pole 5 is set up on the loading platform 1 and inserted into the support pole holding part 2, but if the insertion depth is small, the support pole 5 may rattle or become unstable. Also, even when the insertion depth of the support pole 5 into the support pole holding part 2 is small, a strong material (high hardness, low viscosity) such as an iron-based material must be used to achieve a solid fixation, which also creates the problem of not being able to reduce the weight of the flatbed truck.

[0007] SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a trolley that can stabilize the fixation of a vertically erected pillar by increasing the insertion amount of the pillar into the pillar holding member, while also achieving weight reduction. [Means for solving the problem]

[0008] In order to solve the above problem, the trolley of the present invention comprises a trolley body that is square in plan view and has casters on its underside, square tubular pillar holding members that are provided at the four corners of the trolley body and extend in the vertical direction, and square tubular pillars that are inserted so as to fit within the pillar holding members, wherein a long hole extending in the vertical direction is formed in the lower part of the side of the pillar, and a support shaft that fits into the long hole is provided at the upper part of the pillar holding member, and by fitting the support shaft into the long hole of the pillar, the pillar can be rotated freely relative to the pillar holding member and can be folded, and when the pillar is erected, it can be inserted into the pillar holding member, and a pillar support shaft that receives the lower part of the pillar is provided at the lower part of the pillar holding member, and notches that open downward are provided on the front and rear side surfaces of the lower part of the pillar, and when the pillar is erected and inserted downward, the notches fit into the pillar support shaft.

[0009] The dolly according to the present invention may be configured such that, when the front and rear support pillars are folded rearward and forward, the upper surfaces of the support pillars are flush with the upper surface of the dolly body.

[0010] The truck according to the present invention may be provided with relief portions so that overlapping portions of the support pillars do not interfere with each other when the opposing front and rear support pillars are folded. [Effects of the Invention]

[0011] According to the bogie of this invention, the pillar bearing shafts that hold the pillars in an upright state are provided at the bottom of the pillar holding member, and downwardly opening notches are provided on the front and rear side surfaces of the lower part of the pillar, so that when the pillar is upright and inserted into the pillar holding member, the notches can fit into the pillar bearing shafts, thereby increasing the insertion depth of the pillar into the pillar holding member, increasing the contact area between the pillar and the pillar holding member, and the engagement of the notches with the pillar bearing shafts can hold the pillars even more firmly, stabilizing the upright state. This allows the bogie to be made of non-ferrous metal materials, such as aluminum, and contributes to reducing the weight of the bogie.

[0012] According to the trolley of this invention, when the upper surface of the support pillar folded relative to the trolley body is made flush with the upper surface of the trolley body, it can be used as a platform trolley and the trolley can be carried and stored compactly.

[0013] According to the trolley of this invention, if a clearance is provided so that the overlapping portions of the pillars do not interfere with each other when the opposing pillars at the front and rear are folded, the pillars can be made longer, and accordingly, more loads (materials, etc.) can be loaded when the pillars are erected, enabling efficient transportation. [Brief explanation of the drawings]

[0014] [Figure 1] 2 to 11 show a truck according to an embodiment of the present invention, and this figure is a right side view in which the support columns are folded down. [Figure 2] FIG. 10 is a plan view of the cart with the support columns folded. [Figure 3] FIG. 10 is a right side view of the dolly showing the support columns being folded. [Figure 4]FIG. [Figure 5] 6 to 9 show the corner member located on the rear left side of the corner members provided at the four corners of the carriage, and this figure is a front view. [Figure 6] FIG. [Figure 7] FIG. [Figure 8] FIG. [Figure 9] FIG. [Figure 10] Four-view diagrams of the support pillar located at the rear left side, (a) is a left side view, (b) is a front view, (c) is a right side view, and (d) is a rear view. [Figure 11] Four-view diagrams of the support pillar located at the front left side, (a) is a left side view, (b) is a front view, (c) is a right side view, and (d) is a rear view. DETAILED DESCRIPTION OF THE INVENTION

[0015] The present invention will be described below based on the illustrated embodiments.

[0016] 1 to 11 illustrate a bogie according to an embodiment of the present invention, and in the figures, the bogie 1 comprises a bogie body 2, casters 3 provided at six locations on the underside of the bogie body 2, and supports 4 held at the four corners of the bogie body 2. When indicating the direction of the bogie 1 in this specification, in the plan view of the bogie 1 in Fig. 2, the left side of the drawing will be the front of the bogie 1, the right side of the drawing will be the rear of the bogie 1, the top of the drawing will be the right side of the bogie 1, and the bottom of the drawing will be the left side of the bogie 1.

[0017] The bogie body 2 is rectangular in plan view and consists of corner members 5 provided at the four corners, outer frame members 6 connecting these corner members 5 front to back or left to right, and two inner frame members 7 connecting the two outer frame members 6 facing each other front to back.

[0018] Three lower plates 8 are attached to the underside of the trolley body 2, near both longitudinal edges and at approximately the center, to bridge between two outer frame materials 6 extending in the longitudinal direction, and the casters 3 are provided on the lower plates 8.

[0019] An upper plate 9 is attached to the upper surface of the carriage body 2 so as to bridge between the two outer frame members 6 extending in the longitudinal direction, and materials and the like are loaded on the upper plate 9.

[0020] The corner member 5 is integrally formed with a vertically extending square cylindrical support holding member 50, two mounting pieces 51 protruding from one side of the support holding member 50, and two mounting pieces 51 protruding from one surface of the mounting piece 51, and each pair of two mounting pieces 51 clamps the end of the outer frame material 6 and fixes the outer frame material 6 with screws.

[0021] The frame body is formed by attaching outer frame materials 6 that are perpendicular to each other to each of the four corner members 5 using the above-mentioned mounting pieces 51, and the above-mentioned middle frame material 7, lower plate 8, and upper plate 9 are attached to these.

[0022] For example, in the case of the corner member 5 located at the lower right in Fig. 2 (plan view), two attachment pieces 51r are provided on the right side surface of the pole holding member 50, protruding to the right, and two attachment pieces 51f are provided on the front of the two attachment pieces 51r, protruding forward at positions closer to the inside (right) of a position that does not overlap the pole holding member 50 (see Fig. 2 plan view). The corner member 5 shown in Figs. 5 to 9 is the corner member 5 located at the lower right in Fig. 2 (plan view), and is the corner member 5 located on the right side in Fig. 1 (right side view) and Fig. 3 (right side view).

[0023] The left end of the rear outer frame material 6 is clamped and screwed between the two mounting pieces 51r protruding to the right, and the rear end of the left outer frame material 6 is clamped and screwed between the two mounting pieces 51f protruding forward.

[0024] A long hole 4a that is long in the length direction is formed on the outer surface of the square cylinder on the lower side of the support 4, and the length of this long hole 4a is formed to be approximately the same as or slightly shorter than the length of the support holding member 50, so that when the support 4 is inserted into the support holding member 50, it is hidden within the support holding member 50.

[0025] In addition, the width of the long hole 4a is formed slightly larger than the shaft diameter of the support shaft 52 that is provided to protrude inward from the upper side surface of the support holding member 50, and the support shaft 52 is loosely fitted into the long hole 4a, allowing the support 4 to move relative to the support shaft 52 in the longitudinal direction.

[0026] The support shaft 52 can be, for example, a screw. A pilot hole can be formed in a predetermined position in the support holding member 50, and when the support 4 is assembled to the corner member 5, the screw can be screwed into the pilot hole and the part that protrudes inward can be used as the support shaft 52.

[0027] A cut-out portion 50a having a cross-sectional shape approximately the same as or slightly larger than that of the support pillar 4 is formed at the upper end of the support pillar holding member 50, either at the front or rear (folding side), so that the support pillar 4 fits into the cut-out portion 50a when the support pillar 4 is folded forward or backward.

[0028] This allows the support pillar 4 to be inserted into the support pillar holding member 50 when it is standing upright, and when it is lifted upward from the inserted state and the lower end of the support pillar 4 reaches a position where it is not obstructed by the support pillar holding member 50, it can be rotated forward or backward, and the support pillar 4 can be folded relative to the cart body 2 so that it fits into the cut-out portion 50a.

[0029] The support shaft 52 is formed at a position downward from the upper edge of the support holding member 50, specifically at a position downward by a length approximately equal to half the thickness of the support 4 in the front-to-rear direction, so that when the support 4 is folded, the upper surface of the folded support 4 becomes approximately flush with the upper surface of the trolley body 2 (upper plate 9).

[0030] When the support column 4 is upright, the lower one-third of its length is a rectangular tube that fits into the support column holder 50, and the upper two-thirds is formed to be roughly half the thickness of the lower rectangular tube (see (a), (b), (c), and (d) of Figures 10 and 11). (a) is a left side view, (b) is a front view, (c) is a right side view, and (d) is a rear view. The support column 4 shown in Figure 11 is the support column 4 facing the front of the support column 4 shown in Figure 10, and is the support column 4 located on the left side in Figures 1 (right side view) and 3 (right side view), and is designed to overlap with the support column 4 in Figure 10 when folded (see Figure 3).

[0031] As a result, when the two opposing pillars 4 at the front and rear are folded forward or backward, the portions 4b (relief portions) where the thickness of each pillar 4 is half overlap, and the upper surfaces of the folded pillars 4 become almost flush with the bogie body 2 (upper plate 9) without protruding above.

[0032] In other words, in the case of a support pillar that does not have such a recess 4b, the length of the support pillar must be half the length of the trolley in the fore-and-aft direction, as in the trolley described in Patent Document 1 above, otherwise the tips of the support pillar will overlap and the top surface of the folded support pillar will not be flush with the top surface of the trolley 1.

[0033] Therefore, in the trolley 1 according to the embodiment, a clearance portion 4b is provided so that the two pillars 4 can overlap without interfering with each other, and therefore the upper surface of the folded pillar 4 and the upper surface (upper plate 9) of the trolley main body 2 can be made almost flush, making it possible to use the trolley as a platform trolley and making the trolley 1 compact for transport and storage.

[0034] In addition, since an overlapping portion (recess 4b) is provided between the two pillars 4, the pillars 4 can be made longer by that amount, and when the pillars 4 are erected, more materials can be loaded onto the cart body 2.

[0035] At the lower end of the support pillar 4 when it is upright, a U-shaped hole 4c is formed on the side that is to be folded, which opens downward, and at the lower end of the support pillar holding member 50, a support pillar receiving shaft 53 is provided that extends in the front-to-rear direction and receives the inserted support pillar 4.

[0036] When the support 4 is inserted into the support holding member 50, the U-shaped hole 4c at the lower end of the support 4 fits onto the support bearing shaft 53 from the outside.

[0037] This allows the support 4 to be inserted further by the length of the U-shaped hole 4c, allowing it to be inserted into the support holding member 50 to a greater extent, increasing the contact area between the support 4 and the support holding member 50, and the engagement between the U-shaped hole 4c and the support receiving shaft 53 allows the support 4 to be held even more firmly, stabilizing the support 4 in an upright position.

[0038] Therefore, in the past, bogies had to be made from strong materials (high hardness, low viscosity) such as iron-based materials, but the bogie 1 of this invention can be made from non-ferrous metal materials, such as aluminum, and the bogie 1 can also be made lighter.

[0039] When loading materials or the like onto the trolley body 2 of the trolley 1 configured in this manner, the folded support pillar 4 is raised and placed in a vertical position, and then the support pillar 4 is inserted into the support pillar holding member 50, with the U-shaped hole 4c fitting into the support pillar receiving shaft 53. In other words, the support pillar 4 and the support pillar holding member 50 are connected in two ways: one is by being inserted into the support pillar holding member 50 (which results in the abutment of the outer surface of the support pillar 4 with the inner wall surface of the support pillar holding member 50), and the other is by fitting the U-shaped hole 4c into the support pillar receiving shaft 53, thereby firmly holding the support pillar 4 in an upright position.

[0040] Furthermore, when transporting materials and the like is completed and the trolley 1 is to be stored, the support pillars 4 inserted into the support pillar holding members 50 are lifted and folded forward or backward, and since the support pillars 4 are provided with escape portions 4b, the upper surface (upper plate 9) of the trolley body 2 and the upper surfaces of the support pillars 4 can be made almost flush with each other, and the trolley can be transported and stored compactly as a flatbed truck.

[0041] In this embodiment, the recesses 4b are formed so that the two folded support columns 4 overlap in the vertical direction, but the present invention is not limited to this, and the support columns 4 may overlap in the horizontal direction.

[0042] Furthermore, in this embodiment, the elongated hole 4a is formed on one side surface of the support column 4, but the present invention is not limited to this, and an elongated hole may also be formed on the other opposing side surface. In this case, the support shaft 52 can be provided so as to penetrate the two opposing side surfaces of the support column holding member 50, so that the pivot point of the support column 4 is supported at two locations, left and right, and stable rotation of the support column 4 can be expected. Furthermore, in this embodiment, the elongated hole 4a is formed in the support column 4 and the support shaft 52 is provided in the support column holding member 50, but the present invention is not limited to this, and an elongated hole may be formed in the support column holding member 50 and a support shaft may be provided in the support column 4.

[0043] As described above, in the bogie 1 according to the present invention, the pillar bearing shaft 53 that holds the pillar 4 in an upright state is provided at the bottom of the pillar holding member 50, and downward-opening U-shaped holes 4c (cutouts) are provided on the front and rear side surfaces of the lower part of the pillar 4. Therefore, when the pillar 4 is upright and inserted into the pillar holding member 50, the U-shaped holes 4c (cutouts) can fit into the pillar bearing shaft 53, thereby increasing the amount by which the pillar 4 is inserted into the pillar holding member 50, thereby increasing the contact area between the pillar 4 and the pillar holding member 50. Furthermore, the engagement between the U-shaped holes 4c (cutouts) and the pillar bearing shaft 53 can hold the pillar 4 even more firmly, stabilizing the upright pillar 4. This allows the bogie 1 to be made of a non-ferrous metal material, such as aluminum, thereby reducing the weight of the bogie 1.

[0044] Although the embodiments of the present invention have been described above, the specific configuration is not limited to the above embodiments, and the present invention also includes design changes within the scope of the present invention. For example, in the above embodiments, a screw was used as the support shaft 52, but the present invention is not limited to such screws, and rivets or the like can also be used. In short, it is sufficient to provide a protrusion on the inner surface of the support shaft holding member 50 that fits loosely into the elongated hole 4a of the support shaft 4. [Explanation of symbols]

[0045] 1 cart 2. Cart body 3 Caster 4 pillars 4a long hole 4b Relief 4c Notch (U-shaped hole) 5 Corner parts 50 Pillar holding member 52 Spindle 53 Support shaft

Claims

1. The carriage body and a support pillar rotatably provided on the carriage body, A support shaft is provided to receive the lower part of the support shaft, and a notch that opens downward is provided in the lower part of the support shaft, and when the support shaft is erected, the notch is fitted into the support shaft, The support column bearing shaft extends in a direction in which the support column rotates. A bogie characterized by:

2. When the front and rear support columns are folded rearward and forward, the upper surfaces of the support columns are flush with the upper surface of the carriage body.

2. The truck according to claim 1 .

3. When the opposing front and rear support columns are folded, relief sections are provided to prevent interference between the overlapping portions of the support columns.

3. The bogie according to claim 1 or 2.

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