JP4252862B2 - Packing box door folding device and van type truck provided with the same - Google Patents

Description

  The present invention relates to a packing box door folding device, and more particularly to a packing box door folding device for a van type truck, and more particularly, a spring mechanism and a spring generated by the spring mechanism connected between the packing box door and the packing box. The present invention relates to a van box truck folding device for a van type truck having a lifting force generation mechanism including a link mechanism for transmitting force to the cargo box door, and a van type truck including the same.

  FIGS. 13A and 13B are external views of various van type trucks. In the van type truck shown in FIG. 13 (A), the rear door of the cargo box is lifted, and in the van type truck shown in FIG. Conventionally, a gas damper is used as a lifting device for such a rear door and a side door of the cargo box, and this gas damper is connected between the inner surface of the door and the cargo box body.

  Moreover, the present inventors have proposed a cargo box door lifting device for a van type truck (Patent Document 1).

Japanese Patent Laid-Open No. 11-180153

  As shown in FIGS. 13 (A) and 13 (B), when the vane truck's cargo box door is a single plate, the space required to lift the cargo box door increases.

  An object of the present invention is to provide a packing box door folding device that can lift up a packing box door in a space-saving manner and can sufficiently lift up the packing box door. Furthermore, an object of the present invention is to provide a packing box door folding device for a van type truck that has high durability and can secure a large packing box volume.

In the first aspect, the present invention provides a packing mechanism, a packing box door that opens and closes the packing box, a spring mechanism that is connected between the packing box door and the packing box, and a spring generated by the spring mechanism. A lifting force generation mechanism having a link mechanism for transmitting a force to the packing box door, wherein the lifting force is pivotally attached to the packing box constituting the packing box door. An upper door, a lower door pivotally attached to the upper door, a gate pillar or a torii gate that surrounds the packing box, a vertically extending guide surface, and a tip of the lower door A roller that is attached and slides on the guide surface as the cargo box door is opened and closed, and the upper door and the lower door are sufficiently folded when the cargo box door is fully opened. Adjustment mechanism that adjusts the vertical mounting position for the lower door , Provided inside the lower end of the column portion of the packing box, by guided towards the roller inside the packing box, anda means for lapping the該荷box interior at the closed position the lower door A packing box door folding device is provided, wherein when the packing box door is opened, the entire packing box door is flipped up while the upper and lower doors are folded together.

  In a second aspect, the present invention provides a cargo box, a cargo box door that opens and closes the cargo box, and an upper door that is pivotally attached to the cargo box, and a lower part that is pivotally attached to the upper door. A door, a guide surface formed in a pillar portion of the packing box and extending in a vertical direction, and attached to a tip portion of the lower door, and slides on the guide surface as the packing box door is opened and closed. There is provided a packing box door folding device including a roller, wherein when the packing box door is opened, the entire packing box door is flipped up while the upper and lower doors are folded together.

  According to a third aspect of the present invention, there is provided a van type truck provided with the packing box door folding device.

According to the packing box door folding device of the present invention, the packing box door can be sufficiently lifted in a space-saving manner. Also, by providing the roller position adjustment mechanism, when the cargo box door is opened, the roller is excessively pressed against the guide surface, or the roller is released from the guide surface and acts in the upward direction of the lower door. As a result, the problem that the lower door does not rise sufficiently is solved. Furthermore, the degree of contact between the lower door and the packing box when the door is closed is improved by the means for bringing the lower door to the inside of the packing box at the closed position.

  In a preferred embodiment of the packing box door folding apparatus of the present invention, the packing box door is composed of an upper door and a lower door that are pivotally supported with each other. A roller is provided which slides on the guide surface to guide the lower door and assists the lower door to rise, and further has means for guiding or urging the roller toward the inner side of the cargo box at the cargo box door closing position. . Preferably, this means is provided at an inner lower portion of the gate pillar (the torii pillar portion), an inclined surface which is inclined obliquely toward the inner lower side of the cargo box, and a lower portion of the inclined surface. A rib having a vertical surface formed so as to have a narrow width with respect to the facing surface. According to such an embodiment, the lower door is urged to the inside of the cargo box via the roller, so that the adhesion between the lower door and the cargo box is improved.

  Next, the preferable form of the packing box door lifting apparatus used in combination with the packing box door folding apparatus of this invention is demonstrated.

  In a preferred embodiment of the packing box door lifting apparatus of the present invention, a compression spring or a tension spring is used as an elastic means for generating a moment for lifting the packing box door. Preferably, a coil spring or other shaped spring is used as the elastic means.

  In a preferred embodiment of the cargo box door lifting apparatus of the present invention, a turnbuckle for adjusting the length is provided at an intermediate portion such as the first arm.

  One or more of the packing box door lifting devices according to the present invention are attached to one packing box door according to the size and weight of the packing box door. The packing box door lifting device according to the present invention normally operates along a vertical plane, but may be mounted so as to operate along a horizontal plane in some cases.

  According to the van type truck load box door lifting apparatus of the present invention, in the link system, one end of the first arm is pivotally attached to the inner side of the load box door, and one end of the second arm is connected to the other end of the first arm. Is pivoted, the other end of the second arm is pivotally attached to the cargo box, the third arm is pivotally supported in the middle of the second arm, and one end of the lever is pivotally attached to the cargo box The other end of the third arm and the one end of the shaft are pivotally supported on the other end of the lever, so that the third arm and the shaft are swingably suspended with respect to the cargo box. Thus, the third arm and the shaft are guided to swing (hereinafter referred to as a link mechanism), and in the spring mechanism, the elastic means is connected to the other end of the shaft and is elastically mounted to act between the other end of the shaft and the cargo box. ing.

  In this door lifting device, the lever is suspended so that the third arm and the shaft can swing, and the swinging of the third arm and the shaft is guided, thereby suppressing rattling of the device and smoothing the operation. Durability is improved. In addition, since the operating range of the third arm and the shaft is dynamically idealized by the lever, the apparatus can be configured compactly.

  In addition, the cargo box door lifting apparatus according to a preferred embodiment of the present invention includes a main body side plate on which each member (or main body) of the cargo box door lifting apparatus is mounted, and the cargo box (directly or indirectly). And) one or two or more attachment members fixed to each other and provided with attachment portions for the main body side plates. And this mounting member is a state in which the main body side plate is operated from the side (or the normal direction of the main body side plate, the extending direction of the main body side plate) with each member of the cargo box door lifting device mounted on the main body side plate. Extending to the elastic means side along the inner wall of the cargo box so that it can be attached to the mounting member by an operation perpendicular to the direction of the normal or the normal direction of the inner wall of the cargo box. The mounting portion is formed. This makes it easy to mount the cargo box door lifting device without being obstructed by each member including the second arm and lever, as well as the cargo box door, torii gates and gate pillars (beams and pillars of the torii gates). Can do. In particular, the apparatus can be easily attached to the packing box in a state where all the members constituting the packing box door lifting apparatus are assembled (a state where the packing box door is mounted on the main body side plate).

  In a preferred embodiment of the packing box door lifting apparatus according to the present invention, the first and third arms and levers rotate in directions opposite to each other as the packing box door rotates. The third arm is pivoted in the same direction as the second arm, and the lever is pivoted to each other and pivotally attached to the cargo box so that the lever pivots in the opposite direction to the third arm. Yes. Preferably, the third arm, lever and shaft are pivotally supported at one point by a pin.

  In the preferred embodiment of the packing box door lifting apparatus of the present invention, as an attachment portion of the body side plate in the attachment member, an attachment hole that opens toward the device body side is formed in the extension portion of the attachment member, Attachment holes corresponding to the attachment holes are also formed in the main body side plate, and the main body side plate and the attachment member are fixed to each other from the side of the apparatus main body by bolts that pass through these attachment holes. Preferably, the attachment member is formed in a channel shape, and the main body side plate is formed to include a pair of plate portions fitted to the channel portion of the attachment member, and the pair of plate portions are sandwiched between the channel portions of the attachment member. Fasten both in a state.

  In a preferred embodiment of the packing box door lifting apparatus of the present invention, the mounting member is fixed to the torii (beam part) and / or the gate pillar (the torii pillar part). An attachment member can also be comprised from one attachment member, and can also be divided and comprised. Preferably, the upper or upper divided mounting member of the mounting member is fixed inside the torii (beam portion), and the lower or lower divided mounting member of the mounting member is fixed to the gate column (torii column).

  In the preferred embodiment, the packing box door lifting device of the present invention is a stopper that regulates the maximum opening degree of the packing box door, in particular, the rotation of any one of the first to third arms and the lever is restrained. A stopper is provided for defining the maximum opening of the cargo box door. Preferably, the stopper is fixed to the packing box in the vicinity of the opening of the packing box, and is provided so as to prevent further opening of the packing box door by inhibiting the rotation of the second arm.

  Preferably, a stopper is provided at the opening edge of the cargo box, and a locking portion that is abutted and locked with the stopper is provided in the second arm. Preferably, the second arm is provided with a mechanism for adjusting the degree of protrusion of the locking portion. Preferably, a pair of locking portions are provided so as to sandwich the second arm. In addition, preferably, as a stopper mechanism, a band, a belt, a chain, or the like that regulates the rotation of the second arm is provided between the second arm and the packing box or a member fixed to the packing box.

  In a preferred embodiment of the cargo box door lifting apparatus of the present invention, a seal member is provided between the side edge of the cargo box door and the opening edge of the cargo box, and the first arm is loaded close to the seal member. A plate member for adhering to the box door is attached to the inside of the cargo box door, and the mounting position of the first arm is closer to the inner wall of the cargo box than the mounting center of the plate member along the horizontal direction.

  In the preferred embodiment of the packing box door lifting apparatus of the present invention, each end (corner, pivot point, pivot point) of the first to third arms and the lever is formed in a bifurcated shape. Alternatively, it is also preferable that the first to third arms and the lever are composed of a pair of plates. In such an embodiment, every other end of each of the first to third arms and levers (corner, pivot point, pivot point) according to the order of connection, or The first to third arms and the lever can be composed of a pair of plates.

  In the preferred embodiment of the packing box door lifting apparatus of the present invention, a cover covering the entire lifting apparatus is fixed to the packing box.

  The packing box door lifting device as described above has the following effects. The first effect is that a large load box volume can be secured because the structure of the load box door lifting device is compact. The second effect is that a large cargo box volume can be secured because the operating radius of the cargo box door lifting device is small. The third effect is high durability because the operation of the cargo box door lifting device is smooth and rattling is prevented. The fourth effect is that the operating range of the third arm and the shaft is dynamically idealized by the lever, so that the apparatus can be configured compactly. The fifth effect is that the packing box door lifting device can be easily attached from the side of the apparatus without the packing box door or the apparatus itself getting in the way. As a result, attachment workability is greatly improved, and cost reduction is achieved.

  In order to further clarify the preferred embodiment of the present invention described above, an embodiment of the present invention will be described below with reference to the drawings.

(Reference Example 1)
FIG. 1A is a side view of a load box door lifting device for a van-type truck according to a first embodiment of the present invention, FIG. 1B is a rear view of the same, excluding the load box door, and FIG. 4A is a cross-sectional view taken along line AA of FIG. 1A, FIG. 4B is a cross-sectional view taken along line BB, FIG. 4C is a cross-sectional view taken along line CC, and FIG. ) Is a sectional view taken along the line DD, and FIG. Moreover, FIG. 2 is explanatory drawing of the attachment member of the packing box door lifting apparatus shown to FIG. 1 (A).

  The cargo box door lifting apparatus according to Example 1 (Reference Example 1) of the present invention is preferably applied to the cargo box door folding apparatus of the present invention, and is disposed inside the cargo box of a van type truck. It is mounted between the inner wall of the van truck and the inner surface of the rear cargo box door. First, the mounting member for fixing the packing box door lifting device to the packing box will be described.

  1A, 1B, and 6E, the second arm 2 and the lever 5 are pivotally attached to the main body side plates 10 and 10 via pins 32 and 35, respectively. ing. In this manner, the packing box door lifting device is attached in a state where each member is mounted on the main body side plate 10. On the other hand, a channel-shaped first mounting member 11 and second mounting member 14 are used as members for fixing (indirectly) the main body side plates 10 and 10 to the cargo box 21. In particular, referring to FIG. 2, one end of the first mounting member 11 is fixed to the torii (beam portion) 23, and extends toward the coil spring 7 (see FIG. 1A) along the inner wall of the packing box. A mounting hole is formed in the extending portion. One end of the second mounting member 14 disposed below the first mounting member 11 is fixed to a gate column (a column portion of the torii gate) 24, and is substantially parallel to the first mounting member 11 along the inner wall of the packing box. And an attachment hole is formed in the extended portion. In addition, the 1st attachment member 11 and the 2nd attachment member 14 can also be formed integrally.

  When the load box door lifting device is attached, in particular, referring to FIG. 1 (A) and FIG. 6 (E), the main body between the channel-like first attachment member 11 and second attachment member 14 Side plates 10 and 10 are inserted. The upper portions of the main body side plates 10 and 10 are fastened to the first mounting member 11 by mounting bolts and nuts 12 and 13, and the lower portions are fastened to the second mounting member 14 by mounting nuts 15. Since the apparatus can be attached from the side of the apparatus, the apparatus itself can be carried out very easily without getting in the way.

  Next, the configuration of the main body of the packing box door lifting apparatus will be described. Referring to FIGS. 1 (A) to 6 (E), in this cargo box door lifting device, a cargo box door 19 is rotatably attached to the upper rear side of the cargo box 21 via a hinge 20. One end of the first arm 1 is pivotally attached to the inner surface of the cargo box door 19 by a pin 30 via a flat plate 17 and a triangular plate 16. The flat plate 17 is fixed to the cargo box door 19 with the mounting nut 18 sandwiching the cargo box door 19. A sealing member (not shown) is provided between the side edge of the packing box door 19 and the opening edge of the packing box 21, and the flat plate 17 is fixed to the packing box door 19 so as not to contact the sealing member. Yes. The triangular plate 16 is fixed to the flat plate 17 near the inner wall (side wall) of the load box that extends perpendicularly to the load box door 19 from the mounting center of the flat plate 17. As a result, the entire cargo box door lifting device including the first arm 1 is arranged closer to the inner wall (side wall) of the cargo box that extends perpendicular to the cargo box door 19, thus further increasing the volume of the cargo box 21. Has been.

[Linking mechanism]
The first arm 1 extends downward at the door closing position, and the other end is pivotally supported via a pin 31 at one end (first corner) of the substantially triangular second arm 2. The other end (second corner) of the second arm 2 is pivotally attached to the main body side plates 10 and 10 via pins 32. The first and second arms 1 and 2 are pivotally supported and pivotally attached to each other so as to be closed at the door closing position and to be opened at the door opening position.

  At the door closing position, one end of the third arm 3 is pivotally supported via a pin 33 at an intermediate portion (third corner) of the second arm 2 positioned above the pin 30. In the second arm 2, one side between the pin 31 and the pin 33 is curved so as to avoid the triangular plate 16. The third arm 3 is bent in an arc shape so as to bypass the pin 32 that is the pivot point of the second arm 2, and extends toward the coil spring 7.

  A lever 5 is disposed on the other end of the third arm 3. One end of the lever 5 is pivotally attached to the main body side plates 10 and 10 via pins 35. The other end of the lever 5, the other end of the third arm 3, and one end of the shaft 4 are pivotally supported by a pin 34. In other words, the third arm 3 and the shaft 4 are suspended from the cargo box 21 by the lever 5 so as to be displaceable. As the lever 5 pivots, the swing or stroke of the third arm 3 and the shaft 4 accompanying the rotation of the cargo box door 19 is guided.

[Spring mechanism]
A spring cover 8 is fixed to a spring cover mounting surface 10 a formed on the other end surface of the main body side plates 10, 10. A coil spring 7 is accommodated in the spring cover 8. The shaft 4 is inserted through the lumen of the coil spring 7. On the other end of the shaft 4, a spring seat 6 is locked or connected to the shaft 4 by an adjusting screw 9 so that the position of the spring seat 6 can be adjusted. The coil spring 7 is elastically mounted (compression interposed) between the one end surface of the spring cover 8 and the spring seat 6 so that the compression state thereof can be adjusted by an adjusting screw 9.

  Here, when the rotation or pivoting direction of the first to third arms 1 to 3 and the lever 5 is arranged, the first and second arms 1 and 2 are mutually connected with the rotation of the cargo box door 19. In the opposite direction, the third arm 3 is pivotally supported in the same direction as the second arm 2 and the lever 5 is pivoted in the opposite direction to the third arm 3 and the packing box 21 or the packing box. It is pivotally attached to the door 19 indirectly.

  Here, the stopper mechanism which prescribes | regulates the maximum opening degree of the cargo box door 19 is demonstrated. In the second arm 2, a flat plate portion is formed at a corner near the pin 33, and this flat plate portion serves as a locking surface 2a. On the other hand, a hook-shaped stopper 22 is fixed to one end of the first mounting member 11. The stopper 22 extends downward so that the lower end surface thereof can be brought into contact with the locking surface 2a of the second arm 2.

  Next, the operation and function of the packing box door lifting device will be described. In particular, referring to FIG. 1A, FIG. 1B, and FIG. 3, when the cargo box door 19 is lifted and rotated by the operation, the first arm 1 in FIG. The second arm 2 rotates counterclockwise, the third arm 3 swings counterclockwise and strokes to the left, the lever 5 pivots clockwise, and the shaft 4 strokes to the left while swinging slightly. At the same time, when the shaft 4 strokes to the left side, the compressed coil spring 7 is expanded, and the stored elastic energy is released.

  Here, from the closing position of the cargo box door 19 to a predetermined opening, the moment due to the weight of the cargo box door 19 exceeds the moment generated by the extension of the coil spring 7, and the cargo box door 19 is closed. However, after the predetermined opening degree, the moment by the coil spring 7 increases and the cargo box door 19 is lifted up by itself. When the cargo box door 19 is lifted by its own force and rotates by a predetermined angle, the locking surface 2a of the second arm 2 comes into contact with the stopper 22 and is locked. Thereby, further rotation of the cargo box door 19 is prevented, and the maximum opening degree of the cargo box door 19 is defined.

  The raised cargo box door 19 can be pushed down by closing a string attached to the cargo box door 19 and closed. In the closing process, when the cargo box door 19 is pushed down to a predetermined opening degree, the cargo box door 19 is closed and closed by itself.

  The moment generated by the weight of the cargo box door 19 changes in a sinusoidal manner depending on the opening, but the spring force of the coil spring 7 and the dimensions and arrangement of the first to third arms 1 to 3 are adjusted. Thus, it is possible to make the cargo box door 19 stationary at any or all opening degrees, and in this case, the cargo box door 19 can be lifted up very lightly with an operating force corresponding to the total mechanical friction force. it can.

  Further, the lever 5 suspends the third arm 3 and the shaft 4 in a displaceable manner and guides their swinging or stroke, thereby suppressing rattling of the device and smoothing the operation, thereby improving the durability of the device. Is improved. In addition, the operating range of the third arm 3 and the shaft 4 is mechanically idealized by the lever 5, and the apparatus can be configured compactly.

  Further, from the closing position of the packing box door 19 to a predetermined rotation position, the connection point (pin 33) of the second arm 2 and the third arm 3 and the center of the action point of the coil spring 7 with respect to the shaft 4 (spring seat 6). The pivot axis (pin 32) of the second arm 2 is located on the cargo box roof side, and the pivot axis of the cargo box door 19 (the pivot axis of the hinge 20), the first arm 1 and the second axis. The pivot point (pin 30) of the first arm 1 with respect to the cargo box door 19 from the axis connecting the connecting point (pin 31) of the arm 2 is located on the inner side of the cargo box door. Points are set (the same applies to the following embodiments).

  Hereinafter, in Examples 2 to 5 (Reference Examples 2 to 5), various forms of the stopper mechanism will be described in particular. In these examples, in order to avoid duplication of description, differences from the apparatus according to Example 1 will be mainly described, and the description of Example 1 may be referred to as appropriate regarding common points. And In addition, the packing box door lifting apparatus which concerns on Examples 2-5 (reference examples 2-5) is also suitably applied to the packing box door folding apparatus of this invention.

(Reference Example 2)
FIG. 7 is a side view of a packing box door lifting apparatus according to Embodiment 2 (Reference Example 2) of the present invention. FIG. 8 is an operation diagram of the apparatus shown in FIG. Referring to FIGS. 7 and 8, in the second arm 2, a peak portion is formed at an intermediate portion of one side connecting the pin 31 and the pin 33, and a locking plate portion 40 is formed at an inclined portion on one side of the peak portion. Has been. On the other hand, a stopper 41 is fixed to the lower surface of the torii (beam portion) 23 of the packing box 21. When the cargo box door 19 is rotated by a predetermined opening degree, the locking plate portion 40 is brought into contact with and locked by the stopper 41 (see FIG. 8), thereby preventing further rotation of the cargo box door 19 and the cargo box. A maximum opening degree of the door 19 is defined.

(Reference Example 3)
FIG. 9 (A) is a side operation diagram of a cargo box door lifting apparatus according to Embodiment 3 (Reference Example 3) of the present invention, and FIG. 9 (B) is a rear view thereof. Referring to FIGS. 9A and 9B, one side of the second arm 42 facing the cargo box door 19 is formed in a T-shape, and a female screw 44 is attached to each of the pair of T-shaped protrusions. It has been. Male thread rods 43 are respectively screwed into the female threads 44. By rotating the male screw rod 43, the position of the front end surface of the male screw rod 43 protruding outward from the second arm 2 can be adjusted, and thus the maximum opening degree of the cargo box door 19 can be changed. On the other hand, a stopper 45 is fixed to the lower surface of the torii (beam portion) 23 of the packing box 21. When the cargo box door 19 is rotated by a predetermined opening, the tip surface of the male screw rod 43 is brought into contact with the stopper 45 and is locked, whereby further rotation of the cargo box door 19 is prevented. The opening is defined.

(Reference Example 4)
FIG. 10 (A) is a side operation diagram of a cargo box door lifting apparatus according to Embodiment 4 (Reference Example 4) of the present invention, and FIG. 10 (B) is a rear view thereof. Referring to FIGS. 10 (A) and 10 (B), a bowl-shaped plate portion 53 extending in the horizontal direction is formed on one side of the second arm 52 on the substantially straight line facing the cargo box door 19, Female screws 55 are attached to the pair of protrusions of the bowl-shaped plate portion 53, respectively. Male screw rods 54 are respectively screwed into the female screws 55. By rotating the male screw rod 54, the position of the protruding end surface of the male screw rod 54 can be adjusted, and thus the maximum opening of the cargo box door 19 can be changed. On the other hand, a channel-shaped stopper 56 is fastened to the vertical surface of the torii (beam portion) 23 of the packing box 21. When the cargo box door 19 is rotated by a predetermined opening degree, the distal end surface of the male screw rod 54 is brought into contact with and locked to the lower surface of the stopper 56, thereby preventing further rotation of the cargo box door 19. The maximum opening is defined.

(Reference Example 5)
FIG. 11 is a side view of a packing box door lifting apparatus according to Embodiment 5 (Reference Example 5) of the present invention. FIG. 12 is an operation diagram of the apparatus shown in FIG. Referring to FIGS. 11 and 12, a shaft 63 is fixed to the middle of the second arm 62. On the other hand, a long hole plate 64 is fastened to the main body side plate 68 fastened to the packing box 21 (to the torii (beam portion) 23). An elongated hole 65 is formed in a portion of the elongated hole plate 64 that protrudes downward from the main body side plate 68, and the shaft 66 is fastened so that its mounting position can be adjusted. By adjusting the mounting position of the shaft 66, the maximum opening degree of the cargo box door 19 can be changed. A V-belt 67 is wound between the shafts 63 and 66, one end of the V-belt 67 is fixed to the shaft 63, and the other end is separated from the shaft 66 at the closed position of the cargo box door 19, and is predetermined. The shaft 66 is engaged (contacted) at the opening position. The engagement between the shaft 66 and the V-belt 67 prevents further rotation of the cargo box door 19 via the second arm 62, thereby defining the maximum opening of the cargo box door.

  Next, a load box door lifting device for lifting a folding load box door will be described.

  14 (A) and 14 (B) are external views of a van-type truck to which the packing box door folding device according to Embodiment 6 of the present invention is applied, and FIG. 14 (A) is a packing box door closed state, FIG. 14B shows a state in which the packing box door is open. Since the load box door lifting device for lifting such a folding load box door is provided symmetrically on both the left and right sides of the load box door, in the following description, one load box door is lifted Shall be explained. Further, in the description of the sixth embodiment, the description of the first embodiment can be appropriately referred to in order to avoid the overlapping of the description regarding the common points of the sixth embodiment and the first embodiment (reference example 1). The differences between the sixth embodiment and the first embodiment will be mainly described.

  FIG. 15 is a side sectional view of a packing box door folding device according to Embodiment 6 of the present invention. 16A is a front view of the roller position adjusting mechanism shown in FIG. 15, FIG. 16B is a side view of FIG. 16A, and FIG. 16C is a plan view of FIG. .

  Referring to FIG. 15, the cargo box door is composed of an upper door 19a pivotally attached to the cargo box via a hinge 20, and a lower door 19b pivotally attached to the upper door 19a via an intermediate hinge 70. The A seal member 69 for attaching the lower door 19b to the frame is attached to the lower end of the lower door 19b. When the cargo box door is opened, the upper door 19a and the lower door 19b are folded, and the pivot of the hinge 20 is lifted around the pivot.

  Between the upper door 19a and the cargo box (vehicle body side), a lifting force generation mechanism similar to that of the first embodiment is provided.

  Next, a mechanism for raising the lower door to a state where the lower door and the upper door are sufficiently folded while guiding the lower end portion (tip portion) of the lower door will be described.

  Referring to FIG. 15, a guide surface 82 (see FIG. 19) extending in the vertical direction is formed inside the channel-shaped gate pillar (torii pillar portion) 24. On the other hand, a roller position adjusting mechanism 72 for adjusting the vertical mounting position of the roller 71 with respect to the lower door 19b is attached to the lower end portion of the lower door 19b.

  Referring to FIGS. 15 and 16A to 16C, a bracket 73 is fastened to the lower end portion of the lower door 19b. Slots 74 and 74 are formed on the vertical side surface of the bracket 73, and a support shaft 76 is fastened to the bracket 73 via bolts 75 and 75 that pass through the slots 74 and 74 and the slots 74 and 74. Yes. Further, a horizontal plate portion 77 in which a female screw (first screw portion) is engraved is formed on the bracket 73, while a female screw (second screw portion) is engraved on the support shaft 76. A convex portion 78 is formed. An adjustment screw 79 is screwed into the female screws of the horizontal plate portion 77 and the convex portion 78. The mounter rotates the adjustment screw 79 in a state where the support shaft 76 and the bracket 73 are not completely fastened, so that the gap between the long holes 74 and 74 and the bolts 75 and 75 can be reduced. The vertical position with respect to 19b can be adjusted.

  In addition, a rib 80 is formed on the lower portion 24c of the gate pillar (the torii pillar portion) 24 so as to face the facing surface 83 (see FIG. 19). An inclined surface that guides the roller 71 to the lower portion (initial position) of the rib 80 is formed on the upper portion of the rib 80. In the rib 80, a vertical surface that forms a pair of parallel surfaces with the opposing surface 83 is formed below the inclined surface, and the width between the vertical surface and the opposing surface 83 is narrowed. When the cargo box door is closed, the rollers 71 are sandwiched between the opposing surfaces 83 and the vertical surfaces of the ribs 80. By providing such a rib 80, in the closed state of the cargo box door, the lower door 19b is brought to the inner side of the cargo box via the roller 71, and the seal member and the left and right gate pillars ( The degree of close contact with the column 24 of the torii and the close contact between the seal member 69 attached to the lower end of the lower door 19b and the underframe are increased.

  Next, the operation of the lifting apparatus for the cargo box door will be described in the case of opening the cargo box door. FIG. 17 is an operation diagram of the apparatus shown in FIG. 15 and shows a state where the cover is removed. 18 is an enlarged view of a main part of FIG. 17, and FIG. 19 is a sectional view taken along line XX in FIG. First, referring to FIG. 15, when the operator lifts the lower door 19 b in the closed position beyond the dead point, the spring 7 (see FIG. 1) is extended, and the upper door 19 a is accumulated in the spring 7. In response to the urging force of the elastic energy that had been stored, it jumped up on its own.

  Referring to FIGS. 15 to 17, at this time, in the lower door 19 b, the roller 71 attached to the lower end of the lower door 19 b slides with the guide surface 82 (see FIG. 19) in the gate pillar (the torii pillar part) 24. While rising. Here, the vertical position of the roller 71 is such that the upper door 19a and the lower door 19b are sufficiently folded as shown in FIG. 17 or 18, that is, until the packing box is fully opened. Has been adjusted to be able to rise. In other words, by providing the roller position adjusting mechanism 72, the roller 71 is excessively pressed against the guide surface 82 and the opposing surface 83 when the cargo box door is opened, or the roller 71 is detached from the guide surface 82. As a result, any decrease in the force acting in the upward direction of the lower door 19b is prevented, and as a result, the problem that the lower door 19b does not sufficiently rise is solved.

  The packing box door folding device according to the present invention is preferably applied to a packing box mounted on a vehicle, particularly a packing box of a van type truck, but is applied to a packing box device of other fixed boxes, for example, a fixed structure such as a warehouse. It can also be applied, and can also be applied to doors other than the packing box door or other rotating members.

(A) is a side view of a packing box door lifting apparatus according to Embodiment 1 (Reference Example 1) of the present invention, and (B) is a rear view of the same excluding the packing box door. It is explanatory drawing of the attachment member of the packing box door shown in FIG. 1 (A). It is an operation | movement diagram of the apparatus shown in FIG. (A) is AA sectional drawing of FIG. 1 (A), (B) is the BB sectional drawing, (C) is the CC sectional drawing. (D) is DD sectional drawing of FIG. 1 (A). (E) is an E arrow view of FIG. 1 (A). It is a side view of the packing box door lifting apparatus which concerns on Example 2 (reference example 2) of this invention. FIG. 8 is an operation diagram of the apparatus shown in FIG. 7. (A) is a side operation | movement figure of the cargo box door raising apparatus which concerns on Example 3 (reference example 3) of this invention, (B) is the same rear view. (A) is a side operation | movement figure of the packing box door raising apparatus which concerns on Example 4 (reference example 4) of this invention, (B) is the rear view. It is a side view of the packing box door lifting apparatus which concerns on Example 5 (reference example 5) of this invention. FIG. 12 is an operation diagram of the apparatus shown in FIG. 11. (A) And (B) is an external view of various van type trucks. (A) And (B) is an external view of the van type truck to which the packing box door folding device concerning Example 6 of the present invention is applied, (A) is a packing box door closed state, and (B) is a packing box. Each door is shown open. It is a sectional side view of the packing box door folding apparatus which concerns on Example 6 of this invention. (A) is a front view of the roller position adjusting mechanism shown in FIG. 15, (B) is a side view of (A), and (C) is a plan view of (A). FIG. 16 is an operation diagram of the apparatus shown in FIG. 15. It is a principal part enlarged view of FIG. It is XX sectional drawing in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 1st arm 2 2nd arm 2a Locking surface 3 3rd arm 4 Shaft 5 Lever 6 Spring seat 7 Coil spring 8 Spring cover 9 Adjustment screw 10 Main body side plate 10a Spring cover attachment surface 11 First attachment member 12 Mounting bolt 13 Mounting nut 14 Second mounting member 15 Mounting nut 16 Triangular plate 17 Flat plate 18 Mounting nut 19 Packing box door 19a Upper door 19a Lower door 20 Hinge 21 Packing box 22 Stopper 23 Torii gate, Torii beam section 24 Gate pillar, Torii gate Pillar part 24c Lower 30 pin of the gate pillar (Torii pillar part) (Pivoting point)
31 pin (pivot point)
32 pin (pivot point)
33 pin (pivot point)
34 pin (fulcrum)
35 pin (pivot point)
40 Locking plate portion 41 Stopper 42 Second arm 43 Male screw rod 44 Female screw 45 Stopper 52 Second arm 53 Hook-shaped plate portion 54 Male screw rod 55 Female screw 56 Stopper 62 Second arm 63 Shaft 64 Long hole plate 65 Long hole 66 Shaft 67 V-belt 68 Main body side plate 69 Seal member 70 Intermediate hinge 71 Roller 72 Roller position adjusting mechanism 73 Bracket 74, 74 Long hole 75, 75 Bolt 76 Bearing shaft 77 Horizontal plate part 78 Convex part 79 Roller position adjusting screw 80 Rib 82 Guide surface 83 Opposite surface

Claims (3)

A cargo box, a cargo box door that opens and closes the cargo box, and a link that is connected between the cargo box door and the cargo box and that transmits a spring force generated by the spring mechanism to the cargo box door And a lifting force generating mechanism provided with a mechanism,
An upper door pivotally attached to the cargo box constituting the cargo box door and acting with a lifting force; and a lower door pivotally attached to the upper door;
A guide surface formed in a pillar portion of the packing box and extending in a vertical direction;
A roller attached to the tip of the lower door and sliding on the guide surface as the cargo box door opens and closes;
An adjustment mechanism for adjusting a vertical mounting position of the roller with respect to the lower door so that the upper door and the lower door are sufficiently folded when the cargo box door is fully opened;
Means for moving the lower door to the inner side of the packing box at the closed position by guiding the roller toward the inner side of the packing box, provided at an inner lower end of the column of the packing box;
Have
The packing box door folding device according to claim 1, wherein when the packing box door is opened, the entire packing box door is flipped up while the upper and lower doors are folded together.   The adjustment mechanism includes: a bracket attached to the lower door; a slot formed in the bracket; a fastening member that fastens the support shaft of the roller and the bracket through the slot; and A first screw portion formed; a second screw portion formed on the bearing shaft; and an adjustment screw screwed into the first and second screw portions; The packing box door folding device according to claim 1, wherein the vertical mounting position of the roller with respect to the lower door is adjusted by operating the roller. A van-type truck comprising the packing box door folding device according to claim 1 or 2 .

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