Frame support tool for trucks and flat body truck

Abstract

To provide a frame support tool for trucks that supports a frame against a gate of a loading bed of a flat body truck, and makes it possible to bring down a gate even in a condition where the frame is fixed to the gate.SOLUTION: A frame support tool 30 for trucks is used to retrofit a frame 20, which has a pair of left and right columns 21 erected near side gates 12c and 12d, on a loading bed 11 of a flat body truck 10 structured so that the pair of left and right side gates 12c and 12d and a rear gate can be brought down. A sectional groove is formed to have stationary wall parts which are fixed to the internal surface of the side gate 12c or 12d, and a pair of front and rear clamping wall parts which project inward from the stationary wall parts and clamp the flank of the column 21 back and forth. The side gates 12c and 12d can be brought down with the frame support tools 30 for trucks fixed to the side gates 12d and 12d respectively.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a truck frame support device used to retrofit a frame having a pair of left and right support pillars erected near the side tailgates to the bed of a flatbed truck having a structure in which a pair of left and right side tailgates and a rear tailgate can be collapsed, and to a flatbed truck in which a frame has been retrofitted to the bed using this truck frame support device. [Background technology]

[0002] An arch-shaped platform, which has a pair of left and right support pillars and a beam connecting the upper parts of the pillars, is sometimes retrofitted to the bed of a flatbed truck. This makes it possible to load long items such as ladders and poles (items that would extend beyond the bed if placed flat on the bed) by hanging them at an angle to the platform, so that they do not extend beyond the bed. Since this type of platform is not always used, it is desirable that it be easy to install and remove.

[0003] Several structures for mounting a platform on the bed of a flatbed truck have been proposed. For example, Fig. 5 of Patent Document 1 discloses a structure in which an upper base metal fitting 1 is attached to the top of a tailgate 2 (a plate-shaped member that surrounds the bed of a flatbed truck), a lower base metal fitting 7 is attached to the bottom of the tailgate 2, and the upper base metal fitting 1 and the lower base metal fitting 2 embrace a support column 17 of the platform. In this way, by using the tailgate 2 of the bed to support the platform, it is possible to simplify the structure for supporting the platform on the bed. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2018-127114 A Summary of the Invention [Problem to be solved by the invention]

[0005] Incidentally, the tailgate of a flatbed truck is usually capable of being tilted from an upward standing position to a downward hanging position. When transporting cargo on the bed (when driving the truck), the tailgate can be tilted upward to prevent the cargo from falling off the bed. On the other hand, when loading cargo onto the bed, the tailgate can be tilted downward to make it easier to load the cargo onto the bed.

[0006] In this regard, the structure of Figure 5 of the above Patent Document 1 was designed so that the support pillar 17 of the stand was gripped by the upper base metal fitting 1 and the lower base metal fitting 2 fixed to the gate 2, and therefore the gate 2 could not be tilted downward when the stand was installed on the loading platform. With this structure, when trying to tilt the gate 2 downward, it was necessary to remove the upper base metal fitting 1 and the lower base metal fitting 2 from the gate 2.

[0007] The present invention has been made to solve the above problems, and provides a truck frame support that supports a frame on the tailgate of a flatbed truck and allows the tailgate to be tilted even when the frame is fixed to the tailgate. Another object of the present invention is to provide a flatbed truck with a frame retrofitted to the bed using the truck frame support. [Means for solving the problem]

[0008] The above issues are: A truck frame support device used to retrofit a frame having a pair of left and right support columns erected near the side tailgates of a flatbed truck bed having a structure in which a pair of left and right side tailgates and a rear tailgate can be collapsed, A fixed wall portion fixed to an inner surface of the side gate; A pair of front and rear clamping walls are provided in a state where they protrude inward from the fixed wall portion and clamp the side surfaces of the support column from the front and rear. The cross section is a groove type having the following structure: The side gate can now be lowered even when it is still fixed to the side gate. A truck frame support device characterized by This is solved by providing

[0009] As already mentioned, the side gate can be in an upward standing state or a downward hanging state, and the "inner surface" in the above "inner surface of the side gate" means the surface that faces the inside of the cargo bed (the center in the left-right direction) when the side gate is in the upward standing state. In contrast, the surface opposite the inner surface of the side gate (the surface that faces the outside of the cargo bed when the side gate is in the upward standing state) is sometimes called the "outer surface of the side gate."

[0010] The truck frame support of the present invention has a groove-shaped cross section, and supports the support of the frame by fitting the support of the frame into a groove-shaped portion (hereinafter, sometimes referred to as a "pillar fitting groove") formed by a fixed wall portion and a pair of front and rear sandwiching walls, and positions the frame on the loading platform. In addition, the support fitting groove is open on the side opposite the fixed wall portion (the side facing the inside of the loading platform), and the truck frame support is moved from the outside of the support of the frame (the side facing the outside of the loading platform) and brought closer to the support, so that the support is inserted into the inside of the support fitting groove from the open part (hereinafter, sometimes referred to as a "pillar fitting opening") of the support fitting groove.

[0011] Therefore, by raising the side gate (the truck frame support is fixed to the inner surface of the side gate) from a downward hanging state to an upward standing state, the support pillars of the frame can be fitted into the support pillar fitting grooves of the truck frame support. In other words, with the side gate in the down position, the frame can be placed on the bed of a flatbed truck, and then the side gate can be raised, which is a simple operation that allows the frame to be fixed to the bed.

[0012] Conversely, if the side gate is tilted outward from its upward standing position (a state in which the support posts of the frame are fitted into the support post fitting grooves of the truck frame support fixed to the side gate) to a downward hanging position, the support posts of the frame can be removed from the support post fitting grooves of the truck frame support. In other words, the side gate can be tilted even when the truck frame support is fixed to the side gate.

[0013] In this way, the truck frame support of the present invention allows the frame to be easily attached to and detached from the bed, so that the presence or absence of the frame can be easily changed depending on the usage situation of the flatbed truck.

[0014] The truck frame support of the present invention comprises: The structure is made of double-layered groove-shaped components. Among the doubly arranged members, a fixing device insertion hole for inserting a bolt-type fixing device to be fixed to the side gate is provided coaxially in a fixed wall portion of the member arranged on the inside (hereinafter referred to as the "inner groove-shaped member") and a fixed wall portion of the member arranged on the outside (hereinafter referred to as the "outer groove-shaped member"); a bulge portion that bulges outward is formed around the fastener insertion hole in the fixed wall portion of the inner groove-shaped member; It is preferable that the inner surface of the bulge be made usable as a recess for receiving the head of a bolt-type fastener.

[0015] The truck frame support can be easily fixed to the side gate by placing the outer surface of the fixed wall part against the inner surface of the side gate, inserting a bolt-type fastener into the fastener insertion hole provided in the fixed wall part from the inner surface side of the fixed wall part, and screwing the part of the shaft part of the bolt-type fastener protruding outward from the fastener insertion hole (shaft tip) into the side gate. However, in this case, the head of the bolt-type fastener is positioned inside the support column fitting groove and comes into local contact with the side of the support column fitted into the support column fitting groove. This may cause damage to the side of the support column or may cause the support column to be unable to be stably supported by the support column fitting groove. In this regard, as described above, the head of the bolt-type fastener is placed in a recess in the fixed wall part of the inner groove-shaped member, thereby suppressing the occurrence of such a defect.

[0016] In addition, the above problem is A flatbed truck having a rack attached to its bed using the truck rack support device described above, A pair of left and right truck frame fixing devices are fixed facing each other at opposing locations on the inner surfaces of the pair of left and right side gates. A flatbed truck characterized by This can also be solved by providing

[0017] In this way, by attaching a truck frame support to each of the pair of left and right side gates, it becomes possible to support the pair of left and right pillars of the frame from both the left and right sides with the respective truck frame supports. This makes it possible to position the frame not only in the front-rear direction relative to the bed, but also firmly in the left-right direction.

[0018] In the flatbed truck of the present invention, it is preferable to use a frame having flange-shaped base portions formed at the lower ends of the pillars.

[0019] As already mentioned, when installing the mount on the bed using the above-mentioned truck mount support, the procedure is to place the mount on the bed of a flatbed truck with the side tailgates folded down and then raise the side tailgates. However, by providing a flange-shaped base portion at the lower end of the support pillar as described above, it is possible to support the mount by itself on the bed until the side tailgates are raised (until the support pillars of the mount are supported by the truck mount support).

[0020] In addition, there is a risk that the support pillar of the frame may come off upward from the truck frame support due to vibrations during driving or shocks received by the vehicle body, etc. In this regard, by providing a flange-shaped base portion at the lower end of the support pillar as described above, the base portion functions as a stopper that catches on the lower end of the truck frame support, and it is possible to prevent the support pillar of the frame from coming off upward from the truck frame support. Effect of the Invention

[0021] As described above, the present invention makes it possible to provide a truck frame support that supports a frame on the tailgate of a flatbed truck and allows the tailgate to be folded down even when the frame is fixed to the tailgate. It is also possible to provide a flatbed truck with a frame retrofitted to the bed by using this truck frame support. [Brief description of the drawings]

[0022] [Figure 1] FIG. 1 is a perspective view of a flatbed truck with a rack retrofitted to the bed, showing all side panels raised upward. [Diagram 2] FIG. 1 is a perspective view of a flatbed truck with a rack retrofitted to the bed, showing a state in which some of the tailgates are hanging downward. [Diagram 3] FIG. 1 is a perspective view of a flatbed truck with a rack retrofitted to the bed, showing all side panels hanging downward. [Figure 4]FIG. 13 is a perspective view showing how the truck frame support is attached to the frame pillar. [Diagram 5] FIG. 2 is a perspective view showing the state after the truck frame support is attached to the support column of the frame. [Figure 6] 13 is a perspective view showing a state in which a truck frame support is fixed to a side gate. FIG. [Figure 7] 1 is a cross-sectional view showing a state in which the truck frame support is fixed to a side gate, the cross-section being taken along a plane perpendicular to the height direction of the truck frame support. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0023] The truck platform support of the present invention and a flatbed truck with a platform attached to the bed using the truck platform support will be described in more detail with reference to the drawings. The configurations described below are merely preferred embodiments, and the technical scope of the present invention is not limited to the configurations described below. The truck platform support of the present invention and the flatbed truck can be modified as appropriate within the scope of the present invention.

[0024] 1 to 3 are perspective views of a flatbed truck 10 with a platform 20 attached to a loading platform 11. Fig. 1 shows a state in which all of the tailgates 12 are standing upward, Fig. 2 shows a state in which some of the tailgates 12 are hanging downward, and Fig. 3 shows a state in which all of the tailgates 12 are hanging downward.

[0025] As shown in FIG. 1, the flatbed truck 10 has a flat top surface of a loading platform 11, which is surrounded by a number of tailgates 12. Specifically, the loading platform 11 is surrounded by a front tailgate 12a at the front of the loading platform, a rear tailgate 12b at the rear of the loading platform, a left tailgate 12c on the left side of the loading platform, and a right tailgate 12d on the right side of the loading platform. Each tailgate 12 is provided facing upward and standing along each side of the loading platform 11. These tailgates 12 prevent luggage (not shown) loaded on the loading platform 11 from falling off the loading platform 11. Among the tailgates 12, the pair of left and right tailgates 12c and 12d are sometimes collectively called "side tailgates."

[0026] The lower edges of the three gates 12 (rear gate 12b, left gate 12c, and right gate 12d) excluding the front gate 12a are pivotally supported on the periphery of the loading platform 11 by hinges (not shown). Therefore, the rear gate 12b and each side gate (left gate 12c and right gate 12d) can be rotated about their respective lower edges, and can be tilted from an upward standing state as shown in Figure 1 to a downward hanging state as shown in Figures 2 and 3. By tilting the rear gate 12b, left gate 12c, and right gate 12d, the gates 12 can be prevented from getting in the way when loading luggage (not shown) onto the loading platform 11.

[0027] A platform 20 is attached to the loading platform 11. The platform 20 is arch-shaped and includes a pair of left and right pillars 21 and a beam 22 connecting the upper portions of the pillars. The left and right width of the platform 20 (the distance from the outer surface of one pillar 21 to the outer surface of the other pillar 21) is not particularly limited, but in this embodiment, it is approximately the same as or slightly smaller than the inner width of the gate 12 (the distance from the inner surface of the left gate 12c to the inner surface of the right gate 12d). The cross-sectional shapes of the pillars 21 and the beams 22 are not particularly limited and may be circular or the like, but in this embodiment, metal square pipes are used as the pillars 21 and the beams 22, and the cross-sectional shapes of the pillars 21 and the beams 22 are square or rectangular.

[0028] Two or more stands 11 may be installed, but in this embodiment, only one stand 11 is installed. There is no particular limitation on where on the loading platform 11 the stand 20 is installed, but in this embodiment, it is installed at the rear of the loading platform 11 (near the rear tailgate 12b). By installing this stand 20 on the loading platform 11, long objects such as ladders and poles (not shown) can be loaded while hanging diagonally on the stand 11. Also, by arranging multiple stands 20 in front and behind each other, it becomes possible to attach a roof to the loading platform 11 or to use the loading platform 11 in two levels.

[0029] However, if the platform 20 is simply placed on the top surface of the loading platform 11, there is a risk that the platform 20 may topple over or fall from the loading platform 11. In this regard, in the present embodiment, a flange-shaped base portion 23 is provided at the lower end of the support pillar 21 of the platform 20 to enhance the installation stability of the platform 20, but the platform 20 may still topple over when the flatbed truck 10 is traveling, etc. For this reason, as shown in FIG. 1, a truck platform support 30 is fixed to the inner surface of the left sidegate 12c and the inner surface of the right sidegate 12d, and the truck platform support 30 supports the support pillar 21 of the platform 20 so as not to topple over.

[0030] The truck frame support 30 will be described in detail. Fig. 4 is a perspective view showing the manner in which the truck frame support 30 is attached to the support pillar 21 of the frame 20. Fig. 5 is a perspective view showing the state after the truck frame support 30 has been attached to the support pillar 21 of the frame 20. The truck frame support 30 shown in Figs. 4 and 5 is one that is fixed to the left tailgate 12c (Fig. 1) out of the pair of truck frame supports 30 provided on the left and right sides of the side tailgates (the left tailgate 12c and the right tailgate 12d).

[0031] In the following, for convenience of explanation, of the pair of left and right truck frame supports 30, the truck frame support 30 fixed to the left tailgate 12c may be referred to as the "left truck frame support 30," and the truck frame support 30 fixed to the right tailgate 12d may be referred to as the "right truck frame support 30." Also, of the pair of left and right pillars 21 constituting the frame 20, the pillar 21 on the left tailgate 12c side may be referred to as the "left pillar 21," and the pillar 21 on the right tailgate 12d side may be referred to as the "right pillar 21."

[0032] In the following, the left truck frame support 30 will be mainly described, and a description of the right truck frame support 30 will be omitted. However, the right truck frame support 30 is bilaterally symmetrical to the left truck frame support 30. Therefore, the configuration described for the left truck frame support 30 can also be used for the right truck frame support 30 by inverting it bilaterally.

[0033] As shown in Fig. 4, the truck frame support 30 is a member with a grooved cross section having a fixed wall 31 and a pair of front and rear sandwiching walls 32, and a column fitting groove α is provided on one side (the upper side in Fig. 4). The fixed wall 31 and the pair of front and rear sandwiching walls 32 are both substantially flat. The truck frame support 30 has its fixed wall 31 fixed to the inner surface of a side gate (left gate 12c in Fig. 4), and the side gate (left gate 12c) is fixed in the direction of arrow A in Fig. 4. 1 5, the truck frame support 30 also rotates together with the side gate (left gate 12c), and the pillar 21 is fitted into the pillar fitting groove α of the truck frame support 30. By fitting the pillar 21 into the pillar fitting groove α in this way, the pillar 21 is supported by the truck frame support 30, and the frame 20 can be positioned on the bed 11.

[0034] Specifically, as already described, the support 21 is made of a square pipe, and has four sides (a front side, a rear side, a left side, and a right side). The front side and the rear side of the left support 21 are positioned by a pair of front and rear clamping walls 32 in the left truck frame support 30, and the left side (outward side) of the support 21 is positioned by a fixed wall 31 in the left truck frame support 30. Similarly, the front side and the rear side of the right support 21 are positioned by a pair of front and rear clamping walls 32 in the right truck frame support 30, and the right side (outward side) of the right support 21 is positioned by a fixed wall 31 in the right truck frame support 30. As a result, the frame 20 is restricted from moving in both the front-rear and left-right directions. In addition, the base 20 is supported so as not to tip over in the forward and backward directions.

[0035] In addition, the pillar fitting groove α is in an open state (see pillar fitting opening β (the portion shown by cross-hatching) in FIG. 4) on the side opposite the fixed wall portion 31 (the side facing inward of the bed 11 when the side gate (left gate 12c) is raised as shown in FIG. 5). For this reason, by moving the truck frame support 30 (actually the side gate (left gate 12c) to which the truck frame support 30 is fixed) from the outside of the pillar 21 (the side facing outward of the bed 11) and bringing it closer to the pillar 21 as shown in FIGS. 4 and 5, the pillar 21 can be inserted into the pillar fitting groove α through the pillar fitting opening β.

[0036] Conversely, when the truck frame support 30 (at the edge of the frame, the side gate (left gate 12c) to which the truck frame support 30 is fixed) is moved in the direction of arrow A from the upward standing state as shown in FIG. 2 When the truck frame support 30 is tilted in the direction of the arrow, the pillar 21 can be removed from the pillar fitting groove α. That is, the side gate (left gate 12c) can be tilted even while the truck frame support 30 is fixed to the side gate (left gate 12c).

[0037] In this way, the truck frame support 30 allows the frame 20 to be easily attached to and detached from the bed 11. Therefore, the presence or absence of the frame 20 can be easily changed depending on the situation in which the flatbed truck 10 is used.

[0038] As described above, the truck frame support 30 is used by being fixed to the inner surface of the side gates (left gate 12c and right gate 12d). The method of fixing the truck frame support 30 to the side gates (left gate 12c and right gate 12d) is not particularly limited, but in this embodiment, as shown in Figures 4 and 5, it is fixed using a bolt 40 (bolt-type fastener) having a shaft 41 and a head 42. A thread is cut on the outer periphery of the shaft 41.

[0039] In this way, when fixing using the bolt 40, it is necessary to provide bolt holes in the side tailgates (left tailgate 12c and right tailgate 12d) for screwing in the bolt 40. However, the truck frame support 30 of this embodiment does not require separate bolt holes for this purpose in the side tailgates (left tailgate 12c and right tailgate 12d).

[0040] That is, as shown in Fig. 2, the decorative plate 12e may be fixed to the inner surface of each tailgate 12 of the flatbed truck 10 by a plurality of pairs of bolts 12f, one above the other (particularly in the case of flatbed trucks 10 of 1.5 ton or more, this is often the case), but the truck frame support 30 is fixed by removing some of the bolts 12f and screwing the bolts 40 (Figs. 4 and 5) into the bolt holes 12g (see Fig. 7 below) from which the bolts 12f were removed. For this reason, as shown in Figs. 4 and 5, the fixed wall 31 of the truck frame support 30 is also provided with a pair of bolt insertion holes 33 (fixing device insertion holes) for passing the bolts 40 therethrough, one above and one below.

[0041] The bolt 40 has its shaft 41 passed through the bolt insertion hole 33 (fixing tool insertion hole) from the inner surface side of the fixed wall 31 of the truck frame support 30, and the tip side of the shaft 41 protruding from the outer surface of the fixed wall 31 is screwed into the above-mentioned bolt hole 12g of the side gate (left gate 12c and right gate 12d). This allows the truck frame support 30 to be firmly fixed to the side gate (left gate 12c and right gate 12d) at two points, one above the other. In FIG. 7, the bolt hole 12g is provided without penetrating the gate 12, but it may also be provided penetrating the gate 12 from the inside to the outside (front and back). In the latter case (when the bolt hole 12g penetrates the gate 12), the tip of the shaft of the bolt 40 (or the above-mentioned bolt 12f) is protruded to the outer surface side of the gate 12 and screwed with a nut or the like.

[0042] However, if the bolt 40 has a head 42 that protrudes inward from the inner surface of the fixed wall portion 31, the head 42 will come into local contact with the side surface of the support pillar 21 fitted into the support pillar fitting groove α. This may cause damage to the side surface of the support pillar 21, or may prevent the support pillar 21 from being stably supported by the support pillar fitting groove α.

[0043] For this reason, in this embodiment, as shown in Fig. 6 and Fig. 7, the truck frame support 30 has a structure in which members with grooved cross sections are overlapped in two layers. Specifically, an outer grooved member 30b is overlapped on the outside of an inner grooved member 30a. Fig. 6 is a perspective view showing the state in which the truck frame support 30 is fixed to a side gate (left gate 12c in Fig. 6). Fig. 7 is a cross-sectional view showing the state in which the truck frame support 30 is fixed to the side gate (left gate 12c in Fig. 6) cut by a plane perpendicular to the height direction (up and down direction) of the truck frame support 30.

[0044] The inner groove member 30a has a fixed wall portion 31a that forms the inner surface side of the fixed wall portion 31, and a pair of front and rear sandwiching walls 32a that form the inner surfaces of the pair of front and rear sandwiching walls 32. As shown in FIG. 7, the fixed wall portion 31a has a plate shape with a hat-shaped cross section, and the pair of front and rear sandwiching walls 32a have a substantially flat plate shape. On the other hand, the outer groove member 30b has a fixed wall portion 31b that forms the outer surface side of the fixed wall portion 31, and a pair of front and rear sandwiching walls 32b that form the outer surface sides of the pair of front and rear sandwiching walls 32. Both the fixed wall portion 31b and the pair of front and rear sandwiching walls 32b have a substantially flat plate shape.

[0045] Inner width W of inner channel member 30a 1 (FIG. 7) shows the inner width W of the inner channel 30a. 1 The inner width W of the inner channel member 30a corresponds to the inner width of the column insertion groove α. 1 is set to be approximately the same as or slightly larger than the front-rear width of the support 21. Therefore, when the support 21 is fitted into the support fitting groove α, the inner surface of the sandwiching wall portion 32a of the inner groove member 30a abuts against the front and rear side surfaces of the support 21. In addition, the outer width W 2 (FIG. 7) shows the inner width W of the outer channel 30b. 3 (Fig. 7) As a result, when the inner groove member 30a is fitted into the groove of the outer groove member 30b, the outer surface of the sandwiching wall portion 32a of the inner groove member 30a comes into contact with the inner surface of the sandwiching wall portion 32b of the outer groove member 30b.

[0046] In addition, a bolt insertion hole 33a and a bolt insertion hole 33b are provided coaxially at the overlapping portions of the fixed wall portion 31a of the inner groove member 30a and the fixed wall portion 31b of the outer groove member 30b. The bolt insertion holes 33a and the bolt insertion holes 33b are each provided at two locations, one above the other, with the upper bolt insertion hole 33a and the bolt insertion hole 33b continuing to each other to form the upper bolt insertion hole 33 (FIG. 5), and the lower bolt insertion hole 33a and the bolt insertion hole 33b continuing to each other to form the lower bolt insertion hole 33 (FIG. 5).

[0047] Furthermore, the inner groove member 30a has a bulging portion 30a bulging outward at a location including the bolt insertion hole 33a in the fixed wall portion 31a. 1 is formed, and the bulging portion 30a 1 The recess 30a is formed on the inner surface of the 2 In this embodiment, the bulging portion 30a is formed so that the fixing wall portion 31a has a hat-shaped cross section. 1 and recess 30a 2 The recess 30a is provided in the center of the fixed wall 31a in the front-rear direction in a continuous band shape in the up-down direction. 1 The head 42 of the bolt 40 inserted into the bolt insertion hole 33 fits into the bolt 40. The bolt 40 not only fixes the truck frame support 30 to the side gate (left gate 12c), but also integrates the inner channel member 30a and the outer channel member 30b together.

[0048] In this way, the head 42 of the bolt 40 is inserted into the recess 30a. 1 By fitting the head 41 in the groove 30b, the head 41 does not come into contact with the outward side surface of the support 21, and the outward side surface is in contact with the inner surface of the fixed wall portion 31a of the inner groove member 30b (the bulging portion 30a 1 The outer groove member 30a has a fixed wall 31a of its inner groove member 30a and a fixed wall 31b of its outer groove member 30b. The fixed wall 31b of the outer groove member 30b has a fixed wall 31a of its inner groove member 30a and a fixed wall 31b of its outer groove member 30b. 1 Therefore, the truck rack support 30 can stably support the side of the pillar 21 (FIG. 5).

[0049] Recess 30a 2 Depth D 1 (FIG. 7) is not particularly limited as long as it can accommodate the head 42 of the bolt 40, but is usually 3 mm or more, and preferably 5 mm or more. However, the recess 30a 2 Depth D 1 If the recess 30a is made too large, 2 (Usually formed by press molding, etc.) is difficult to form. 2 Depth D 1is usually set to 20 mm or less. 2 Depth D 1 The bulging portion 30a 1 The protruding height of the slit is approximately equal to that of the slit.

[0050] Depth D of the groove of the inner groove member 30a (this groove becomes the column insertion groove α) 1 (FIG. 7) is not particularly limited. However, the depth D of this groove 1 If the depth D of the groove of the inner groove member 30a is small, the support 21 fitted in the support fitting groove α may come off. 1 is preferably 0.3 times or more (e.g., 30 mm or more) the lateral width of the support 21, more preferably 0.5 times or more (e.g., 50 mm or more), and even more preferably 0.7 times or more (e.g., 70 mm or more). However, the depth D of the groove of the inner groove member 30a 1 If the depth D of the inner groove member 30a is too large, it may be difficult to fit the pillar 21 into the pillar fitting groove α. In addition, the truck frame support 30 will protrude significantly inward from the loading platform 11. For this reason, the depth D of the inner groove member 30a 1 is preferably kept to 1.5 times the left-right width of the support 21 or less (for example, 150 mm or less), and more preferably to 0 times or less (for example, 100 mm or less).

[0051] In this embodiment, as shown in Fig. 5, a flange-shaped base portion 23 is provided at the lower end of the pillar 21. When installing the platform 20 on the bed 11 using the truck platform support 30, the platform 20 is placed on the bed 11 with the side gates (left gate 12c and right gate 12d) laid down, and then the side gates (left gate 12c and right gate 12d) are raised. However, by providing the flange-shaped base portion 23, the platform 20 can be made to stand on the bed 11 until the side gates (left gate 12c and right gate 12d) are raised (until the pillar 21 of the platform 20 is supported by the truck platform support 30).

[0052] In addition, there is a risk that the pillars 21 of the mount 20 may come out upward from the truck mount support 30 due to vibrations during driving or shocks received by the vehicle body, but by providing a flange-shaped base portion 23, the base portion 23 functions as a stopper that catches on the lower end of the truck mount support 30, preventing the pillars 21 from coming out upward from the truck mount support 30.

[0053] However, even if the flange-shaped base portion 23 is provided, the platform 20 may rattle in the vertical direction by the gap between the lower end of the truck platform support 30 and the base portion 23. In order to suppress this rattle, the truck platform support 30 may be fixed in the vertical direction to the support column 21. For example, a slit (hereinafter referred to as the "pillar-side slit") may be provided on the side surface of the support column 21, and a slit (hereinafter referred to as the "support-side slit") may also be provided in the truck platform support 30 at a location overlapping the pillar-side slit, and a common stopper member may be inserted into the pillar-side slit and the support-side slit, thereby restricting the vertical movement of the truck platform support 30 relative to the support column 21. The support-side slit may be provided in the fixed wall portion 31, but if it is provided in the clamping wall portion 32, it is easier to insert the stopper member. [Explanation of symbols]

[0054] 10 Flatbed truck 11 Cargo Bed 12. Aori 12a Front gate 12b Rear Awning 12c Left side gate (side gate) 12d Right side gate (side gate) 12e Decorative board 12f volts 12g bolt hole 20 Mounting stand 21 Post 22 Beam 23 Base 30 Truck stand support 30a Inner channel member 30a1 bulge 30a 2 Recess 30b Outer channel member 31 Fixed wall section 31a Fixed wall section (inner groove type member) 31b Fixed wall section (outer channel-shaped member) 32 Holding wall part 32a Holding wall part (inner groove type member) 32b Holding wall part (outer groove type member) 33 Bolt insertion hole (fixture insertion hole) 33a Bolt insertion hole (inner groove type component) 33b Bolt insertion hole (outer grooved member) 40 Bolt (Bolt-type fastener) 41 Shaft 42 Head D 1 Depth of the groove (post insertion groove) of the inner groove type component W 1 Inside width of inner channel W 2 Outside width of inner channel W 3 Inside width of inner channel α Support fitting groove β Support fitting hole

Claims

1. A truck frame support device used to retrofit a frame having a pair of left and right support columns erected near the side tailgates of a flatbed truck bed having a structure in which a pair of left and right side tailgates and a rear tailgate can be collapsed, A fixed wall portion fixed to an inner surface of the side gate; A pair of front and rear clamping walls are provided in a state where they protrude inward from the fixed wall portion and clamp the side surfaces of the support column from the front and rear. The cross section is a groove type having the following structure: The side gate can now be lowered even when it is still fixed to the side gate. A truck frame support device characterized in that:

2. It has a structure in which groove-shaped cross-sections are overlapped in two layers. Of the doubly arranged members, the member arranged on the inside (hereinafter referred to as the "inner channel-shaped member" ) fixed wall portion and a member arranged on the outside (hereinafter referred to as the "outer channel-shaped member"). The fixing wall portion of the side gate is provided with a fixing tool insertion hole for inserting a bolt type fixing tool to be fixed to the side gate, the fixing tool insertion hole being provided coaxially with the fixing wall portion of the side gate. A bulge that bulges outward is formed around the fastener insertion hole in the fixed wall of the inner channel-shaped member, The inner surface of the bulge is formed as a recess for receiving the head of the bolt-type fastener.

2. The truck rack support of claim 1.

3. A flatbed truck having a platform retrofitted to a bed using the truck platform support device according to claim 1 or 2, A pair of left and right truck frame fixing devices are fixed facing each other at opposing locations on the inner surfaces of the pair of left and right side gates. A flatbed truck characterized by its

4. 2. A flatbed truck according to claim 1, wherein the platform has a flange-shaped base portion formed at the lower end of a support pillar.

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