JP2000313362A - Cargo box door kick up device and van type truck provided with the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cargo box door kick up device of a van type truck having high durability and capable of ensuring a large cargo box volume. SOLUTION: One end of a first arm 1 is pivotted on an inner face of a cargo box door 19, one end of a second arm 2 is pivotally supported at its other end, the other end of the second arm 2 is pivotted on a cargo box 21, a third arm 3 is pivotally supported in an intermediate part of the second arm 2, and one end of a lever 5 is pivotted on the cargo box 21. The other end of the third arm 3 and one end of a shaft 4 are pivotally supported at the other end of the lever 5 through a pin 34 so that the third arm 3 and the shaft 4 are suspended on the cargo box 21 so as to swing and the swing of the third arm 3 and the shaft 4 is guided by pivotal motion of the lever 5 to realize a dynamically ideal condition of an operation scope of the third arm 3 and the shaft 4. A coil spring 7 is connected with the other end of the shaft 4 so that elastic force acts between the other end of the shaft 4 and the cargo box 21 so as to generate moment for kick up the cargo box door 19.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a packing box door lifting device, and more particularly to a packing box door lifting device for a van type truck and a van type truck provided with the same.

[0002]

2. Description of the Related Art FIGS. 13A and 13B are external views of various van-type trucks. In the van type truck shown in FIG. 13 (A), the packing box rear door, FIG. 13 (B)
In the van-type truck shown in (1), the packing box side doors are respectively flipped up with the upper side of the packing box as a rotation axis. Conventionally,
A gas damper is used as a device for lifting the rear and side doors of the packing box, and the gas damper is connected between the inner surface of the door and the packing box body.

Further, the present inventors have proposed a packing box door flip-up device of a type which is mounted on the roof of a packing box door (see Japanese Patent Application No. 9-365729).

[0004]

However, the conventional box door flip-up device using a gas damper has a problem that gas leaks frequently occur from the gas damper, resulting in low durability and high cost.

[0005] In addition, in the case of a type of box door flip-up device of the type which is proposed by the present inventors in Japanese Patent Application No. 9-365729, which is mounted on the roof of a load box door, the height of the vehicle is increased by the height of the flip-up device. Due to legal restrictions on the vehicle height, there is a case where the height of the packing box must be reduced by installing this type of flip-up device, and as a result, the packing box volume is reduced. In addition, when the height of the cargo entrance is low, there is a possibility that a van-type truck provided with this type of flip-up device cannot enter.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a cargo box door flipping device of a van type truck which has high durability and can secure a large cargo box volume.

[0007]

SUMMARY OF THE INVENTION According to the present invention, there is provided an apparatus for lifting a carton door of a van type truck, wherein one end of a first arm is pivotally mounted inside the carton door, and the other end of the first arm is pivotally connected to the other end of the first arm. One end of the second arm is pivotally supported, the other end of the second arm is pivotally connected to the packing box, the third arm is pivotally supported at an intermediate portion of the second arm, and one end of the lever is connected to the packing box. And the other end of the third arm and one end of the shaft are pivotally supported by the other end of the lever, whereby the third arm and the shaft are swingably suspended with respect to the packing box, Further, the swing of the third arm and the shaft is guided by the pivotal movement of the lever, and the elastic means is connected to the other end of the shaft and is elastically mounted so as to act between the other end of the shaft and the packing box.

In this door flipping device, the third arm and the shaft are swingably suspended by the lever, and the swing is guided, whereby rattling of the device is suppressed and the operation is smoothly performed. And the durability of the device is improved. In addition, the lever makes the operating range of the third arm and the shaft mechanically ideal, so that the device can be made compact.

Further, the packing box door flip-up device according to the second aspect of the present invention comprises: a main body side plate on which each member (or main body) of the packing box door flip-up device is mounted; (Indirectly) and one or more attachment members provided with attachment portions for the main body side plate. The mounting member can be operated from the side (or the normal direction of the main body side plate, the extending direction of the main body side plate) in a state where the members of the packing box door flip-up device are mounted on the main body side plate. To the elastic means along the inner wall of the packing box so as to be attached to the mounting member in a direction perpendicular to the direction of the packing box or along the normal direction of the packing box inner wall. The mounting portion is formed. This facilitates the mounting of the packing box door lifting device without being disturbed by the members including the second arm and the lever, and further by the packing box door, the torii gate and the pillar (the torii beam and column). Can be. In particular, the device can be easily attached to the packing box in a state where all the members constituting the packing box flip-up device are assembled (mounted on the main body side plate).

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In a preferred embodiment of the present invention, the first and third arms and levers are provided with the first and second arms as the cargo box door rotates. The arms pivot in opposite directions and the third arm moves to the second
Pivoted in the same direction as the first arm and the lever pivoted in the opposite direction to the third arm, and are pivotally supported on each other and pivotally mounted on the packing box. Preferably, the third arm, lever and shaft are pivotally supported at one point by a pin.

In a preferred embodiment of the packing box flipping device according to the present invention, a mounting hole is formed in the extending portion of the mounting member so as to open toward the side of the device main body as a mounting portion of the main body side plate in the mounting member. On the other hand, mounting holes corresponding to the mounting holes are also formed in the main body side plate, and the main body side plate and the mounting member are fixed to each other from the side of the device main body by bolts inserted through these mounting holes. Preferably, the mounting member is formed in a channel shape, and the main body side plate is formed to include a pair of plate portions fitted into the channel portion of the mounting member, and the pair of plate portions is sandwiched between the channel portions of the mounting member. The two are concluded in the state.

[0012] In a preferred embodiment of the cargo box door flipping device according to the present invention, the mounting member is fixed to the torii (beam) and / or the gate (torii pillar). The attachment member can be constituted by one attachment member or can be constituted by being divided. Preferably, the upper or upper split mounting member of the mounting member is fixed inside the torii (beam), and the lower or lower split mounting member of the mounting member is fixed to the gate post (torii column).

[0013] In a preferred embodiment of the present invention, in the preferred embodiment, a stopper for defining the maximum opening of the packing door, in particular, any one of the first to third arms and the lever is rotated. A stopper is provided which regulates the maximum opening of the packing box door by stopping. Preferably, the stopper is fixed to the packing box close to the opening of the packing box,
It is provided to prevent further opening of the packing box door by inhibiting the rotation of the second arm.

[0014] Preferably, a stopper is provided on an opening edge of the packing box, and a locking portion for abuttingly locking the stopper is provided on the second arm. Preferably, a mechanism for adjusting the degree of protrusion of the locking portion is provided on the second arm. Preferably, a pair of locking portions is provided so as to sandwich the second arm. Preferably, as a stopper mechanism, a band, a belt, a chain, or the like for regulating 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 present invention, a seal member is provided between a side edge of the packing door and an opening edge of the packing box. A plate member for fixing the arm to the packing box door is mounted inside the packing box door, and the mounting position of the first arm is closer to the inner wall of the packing box than the mounting center of the plate member along the horizontal direction. Is done.

In a preferred embodiment of the packing door flip-up device of the present invention, each end (corner, pivot point, pivot point) of each of the first to third arms and levers is bifurcated. . Alternatively, it is also preferable that the first to third arms and levers include a pair of plates. In such an embodiment, every other end (corner, pivot point, pivot point) of the first to third arms and levers is bifurcated according to the order of connection, or The first to third arms and levers can be composed of a pair of plates.

[0017] In a preferred embodiment of the present invention, a cover for covering the entire box is fixed to the packing box.

[0018] In a preferred embodiment of the present invention, the cargo box door flipping device comprises an upper door and a lower door which are pivotally connected to each other, and a gate post (torii pillar) is provided at the tip of the lower door. Rollers are provided to guide the lower door by sliding with the inner guide surface and to assist in raising the lower door. Further, when the packing door is closed, the rollers are guided or biased toward the inside of the packing box. Having means.
Preferably, the means is provided at an inner lower part of a gate post (torii column) at an inclined surface inclined obliquely downward toward the inner side of the packing box, and provided between the opposed surface and the inclined surface provided below the inclined surface. And a vertical surface having a narrow width with respect to the opposing surface so as to be able to hold the same. According to such an embodiment, the lower door is urged toward the inside of the packing box via the roller, whereby the degree of close contact between the lower door and the packing box is improved.

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

In a preferred embodiment of the packing door flipping device of the present invention, a turnbuckle for adjusting the length is provided at an intermediate portion such as a first arm.

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

In the packing box flipping device according to the present invention, one or two or more packing box doors are attached to one packing box door depending on the size and weight of the packing box door. The box door flipper according to the invention normally operates along a vertical plane, but can optionally be mounted to operate along a horizontal plane.

[0023]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In order to further clarify the preferred embodiments of the present invention described above, an embodiment of the present invention will be described below with reference to the drawings.

[Embodiment 1] FIG. 1A is a side view of an apparatus for lifting a carton door of a van type truck according to a first embodiment of the present invention, and FIG. FIG. 4A is a cross-sectional view taken along the line AA of FIG. 1A, FIG. 4B is a cross-sectional view taken along the line BB, and FIG.
FIG. 5 (D) is a sectional view taken along the line DD, and FIG. 6 (E) is a view taken along the arrow E in FIG. FIG. 2 is an explanatory view of an attachment member of the packing box door flip-up device shown in FIG.

The cargo box door flipping device according to the first embodiment of the present invention is disposed inside the cargo box of a van type truck, and is attached between the inner wall of the cargo box of the van type truck and the inner surface of the rear cargo box door. . First, a description will be given of a mounting member for fixing the lifting device of the packing box door to the packing box.

1 (A), 1 (B) and 6
Referring to (E), 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. As described above, each member is connected to the main body side plate 10.
, The packing box door flip-up device is mounted. On the other hand, a channel-shaped first mounting member 11 and a second mounting member 14 are used as members for (indirectly) fixing the main body side plates 10 and 10 to the packing box 21. In particular, referring to FIG. 2, one end of the first mounting member 11 is fixed to a torii (beam) 23 and extends along the inner wall of the packing box toward the coil spring 7 (see FIG. 1A). ,
A mounting hole is formed in the extending portion. The second mounting member 14 arranged below the first mounting member 11 includes:
One end thereof is fixed to a gate post (portion of a torii gate) 24, extends substantially parallel to the first mounting member 11 along the inner wall of the packing box, and a mounting hole is formed in this extended portion. Note that the first mounting member 11 and the second mounting member 14 may be formed integrally.

When the packing box door flip-up device is mounted, in particular, referring to FIGS. 1A and 6E, the first mounting member 11 and the second mounting member 14 in the form of a channel are used.
The main body side plates 10, 10 are inserted between them. The upper parts of the main body side plates 10, 10 are the mounting bolts, nuts 12, 1
3 is fastened to the first mounting member 11, and a lower portion thereof is fastened to the second mounting member 14 by the mounting nut 15. Since the mounting work of this device can be performed from the side of the device, the device itself can be very easily executed without disturbing the device itself.

Next, the structure of the main body of the packing box flipping device will be described. Referring to FIGS. 1A to 6E,
In this packing box flipping device, a packing box door 19 is rotatably mounted on a rear upper side of a packing box 21 via a hinge 20. The first arm 1 is provided on the inner surface of the packing box door 19 via a flat plate 17 and a triangular plate 16.
Is pivotally connected by a pin 30. The flat plate 17 is fixed to the packing box door 19 with the mounting nut 18 sandwiching the packing box door 19. Note that the packing box door 1
A seal member (not shown) is provided between the side edge of the package 9 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. The triangular plate 16 is fixed to the flat plate 17 near the inner wall (side wall) of the packing box extending perpendicular to the packing box door 19 from the mounting center of the flat plate 17. As a result, the entire packing box flip-up device including the first arm 1 is disposed near the packing box inner wall (side wall) extending perpendicular to the packing box door 19, and thus the volume of the packing box 21 is further increased. Have been.

The first arm 1 extends downward at the door closing position, and the other end is pivotally supported via a pin 31 to one end (first corner) of a second arm 2 having a substantially triangular shape. I have. The other end (second corner) of the second arm 2 is
Are pivotally attached to the main body side plates 10, 10. First
The second arms 1 and 2 are closed in the door closed position,
They are pivotally supported and pivoted together to open the legs in the door open position.

In 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 located above the pin 30. . In the second arm 2, one side between the pins 31 and 33 is curved so as to avoid the triangular plate 16. Further, the third arm 3 is bent in an arc shape so as to bypass the pin 32 which is the pivot point of the second arm 2,
It extends toward the coil spring 7.

On the other end of the third arm 3, a lever 5 is arranged. One end of the lever 5 is connected to the main body side plates 10, 1
0 via a pin 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 pins 34. In other words, the lever 5 allows the third arm 3 and the shaft 4
Are displaceably suspended with respect to the packing box 21. When the lever 5 pivots, the swing or stroke of the third arm 3 and the shaft 4 accompanying the rotation of the packing box door 19 is guided.

A spring cover 8 is fixed to a spring cover mounting surface 10a formed on the other end surfaces of the main body side plates 10, 10. The coil spring 7 is housed in the spring cover 8. The shaft 4 passes through the inner cavity of the coil spring 7. At 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 as to be position-adjustable. The coil spring 7 is elastically mounted (compressed and 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, if the turning or pivoting directions of the first to third arms 1 to 3 and the lever 5 are arranged, the packing box door 19
The first and second arms 1 and 2 move in opposite directions, the third arm 3 moves in the same direction as the second arm 2, and the lever 5 moves in the opposite direction to the third arm 3. Are pivotally connected to each other and indirectly pivotally connected to the packing box 21 or the packing box door 19 so as to rotate.

Here, a stopper mechanism for defining the maximum opening of the packing box door 19 will be described. In the second arm 2, a flat plate portion is formed at a corner near the pin 33, and the flat plate portion serves as the locking surface 2 a. 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 abut on the locking surface 2a of the second arm 2.

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

Here, from the closed position of the packing box door 19 to a predetermined opening degree, the moment due to the weight of the packing box door 19 exceeds the moment generated by the extension of the coil spring 7,
The packing box door 19 is closed and is selfish. However, after the predetermined opening degree, the moment due to the coil spring 7 exceeds, and the packing box door 19 pops up by itself. When the packing box door 19 is lifted by itself and rotated by a predetermined angle, the second arm 2
The locking surface 2a of the first member comes into contact with the stopper 22 and is locked. This prevents further rotation of the packing box door 19,
The maximum opening of the packing box door 19 is defined.

The flipped-up packing box door 19 can be closed by being pushed down by pulling a string or the like attached to the packing box door 19. In the closing stroke, when the packing box door 19 is pushed down to a predetermined opening degree, the packing box door 19 closes and is closed on its own.

The moment generated by the weight of the packing box door 19 changes in a sinusoidal curve depending on the opening thereof, but the spring force of the coil spring 7, the first to third arms 1 to 3
By adjusting the size and arrangement of 3, the cargo box door 19 can be stopped at any or full opening, and in this case, the load can be extremely lightly loaded with an operating force corresponding to the total mechanical frictional force. The box door 19 can be flipped up.

The lever 5 allows the third arm 3
The shaft and the shaft 5 are displaceably suspended and their swings or strokes are guided, whereby the rattling of the device is suppressed, the operation becomes smooth, and 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 device can be compact.

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

Hereinafter, various embodiments of the stopper mechanism will be described in Examples 2 to 5. In these embodiments, in order to avoid repetition of the description, differences from the apparatus according to the first embodiment will be mainly described, and the description of the first embodiment can be appropriately referred to for common points. And

[Embodiment 2] FIG. 7 is a side view of a cargo box door flipping device according to Embodiment 2 of the present invention. FIG. 8 is an operation diagram of the device shown in FIG. Referring to FIGS. 7 and 8, in the second arm 2, a peak is formed at an intermediate portion of one side connecting the pins 31 and 33, and a locking plate portion 40 is formed at an inclined portion on one side of the peak. Have been. On the other hand, packing box 2
A stopper 41 is fixed to the lower surface of the first torii (beam) 23. When the packing box door 19 rotates by a predetermined opening degree, the locking plate portion 40 comes into contact with the stopper 41 and is locked (see FIG. 8), so that further rotation of the packing box door 19 is prevented, and The maximum opening of the door 19 is defined.

[Embodiment 3] FIG. 9A is a side elevational view of a packing box door flip-up device according to Embodiment 3 of the present invention, and FIG. 9B is a rear view of the same. 9 (A) and 9 (B)
Referring to, one side of the second arm 42 facing the packing box door 19 is formed in a T-shape, and female screws 44 are attached to a pair of T-shaped protrusions, respectively. Female screw 44
Are screwed with male screw rods 43, respectively. By turning the male screw rod 43, the position of the distal end surface of the male screw rod 43 projecting outward from the second arm 2 can be adjusted, and thus the maximum opening of the packing box door 19 can be changed. On the other hand, a stopper 45 is fixed to the lower surface of the torii (beam) 23 of the packing box 21. When the packing box door 19 rotates by a predetermined opening degree, the distal end surface of the male screw rod 43 comes into contact with the stopper 45 and is locked, so that further rotation of the packing box door 19 is prevented, and The opening is defined.

[Fourth Embodiment] FIG. 10A is a side view showing the operation of a cargo box door flipping device according to a fourth embodiment of the present invention.
FIG. 10B is a rear view of the same. FIG. 10 (A) and FIG.
Referring to FIG. 0 (B), a hook-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 packing box door 19, and the hook-shaped plate portion 53 is formed.
Female screws 55 are respectively attached to the pair of protrusions. The male screw rod 54 is screwed into the female screw 55. By turning the male screw rod 54, the position of the distal end surface of the projecting male screw rod 54 can be adjusted, and thus the maximum opening of the packing 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. Packing box door 19
Is rotated by a predetermined opening, the distal end surface of the male screw rod 54 abuts on the lower surface of the stopper 56 and is locked, whereby further rotation of the packing box door 19 is prevented, and Is defined.

[Fifth Embodiment] FIG. 11 is a side view of a packing box door flipping device according to a fifth embodiment of the present invention. FIG. 12 is an operation diagram of the device 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, for the packing box 21 (Torii (beam part) 2
3) The main body side plate 68 thus fastened has a long hole plate 64
Has been concluded. A long hole 65 is formed in a portion of the long hole plate 64 projecting downward from the main body side plate 68, and a shaft 66 is fastened so that its mounting position can be adjusted. Axis 6
By adjusting the mounting position of 6, the maximum opening of the packing box door 19 can be changed. A V-belt 67 is suspended 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 when the packing box door 19 is closed. At the opening position, it engages (contacts) with the shaft 66. By the engagement between the shaft 66 and the V-belt 67, the packing box door 19 is moved through the second arm 62.
Is prevented from further rotating, and the maximum opening of the packing box door is defined.

Next, a description will be given of a packing box flip-up device for flipping up a folding type packing box door.

Embodiment 6 FIGS. 14A and 14
FIG. 14B is an external view of a van-type truck to which the packing box door flipping device according to the sixth embodiment of the present invention is applied, and FIG.
14A shows the packing box door closed state, and FIG. 14B shows the packing box door open state. Hereinafter, a cargo box door lifting device according to a sixth embodiment of the present invention for flipping such a foldable cargo box door will be described. In addition, since the packing box flipping device is provided symmetrically on both the left and right sides of the packing box door, in the following description, one packing box flipping device will be described. Example 6
In the description of the second embodiment, regarding the common points between the sixth embodiment and the first embodiment, the description of the first embodiment can be appropriately referred to in order to avoid repetition of the description. A difference from the first embodiment will be described.

FIG. 15 is a side sectional view of a packing box door flip-up device according to Embodiment 6 of the present invention. FIG. 16A shows FIG.
16 (B) is a side view of FIG. 16 (A), and FIG. 16 (C) is a plan view of FIG. 16 (A).

Referring to FIG. 15, the packing box door includes an upper door 19a pivotally connected to the packing box via a hinge 20;
And a lower door 19b pivotally connected to the upper door 19a via an intermediate hinge 70. At the lower end of the lower door 19b, a seal member 69 for attaching the lower door 19b to the underframe is attached. When the packing box door is opened, the upper door 19a and the lower door 19b are folded,
The hinge 20 pivots up with the pivot axis as the pivot axis.

Between the upper door 19a and the cargo box (on the side of the vehicle body), the same lifting force generating mechanism as in 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 a channel-shaped gate post (torii post) 24. On the other hand, a roller position adjusting mechanism 72 for adjusting a vertical mounting position of the roller 71 with respect to the lower door 19b is attached to a lower end portion of the lower door 19b.

Referring to FIGS. 15 and 16 (A) to 16 (C), a bracket 73 is fastened to the lower end of the lower door 19b. Slots 74, 74 are formed in the vertical surface of the side of the bracket 73, and the bracket 73 has slots 74, 74 and bolts 75, which pass through the slots 74, 74.
A bearing shaft 76 is fastened via 75. Further, on the bracket 73, a horizontal plate portion 77 on which a female screw (first screw portion) is engraved is formed.
A convex portion 78 having an internal thread (second thread portion) engraved thereon is formed on the upper portion. An adjusting screw 79 is screwed into the female screw of the horizontal plate portion 77 and the female screw of the convex portion 78. The installer is
By rotating the adjusting screw 79 in a state where the bearing shaft 76 and the bracket 73 are not completely fastened, the roller 71 is removed by a gap between the elongated holes 74, 74 and the bolts 75, 75.
Can be adjusted in the vertical direction with respect to the lower door 19b.

Also, the lower part 24 of the gate post (torii pillar part) 24
c has a rib 80 facing the opposing surface 83 (see FIG. 19).
Are formed. At the upper part of the rib 80, an inclined surface for guiding the roller 71 to the lower part (initial position) of the rib 80 is formed. Below the inclined surface of the rib 80, a vertical surface is formed that forms a pair of parallel surfaces with the opposing surface 83, and the width between the vertical surface and the opposing surface 83 is reduced. In the closed state of the packing box door, the roller 71 is held between the opposing surface 83 and the vertical surface of the rib 80. By providing such a rib 80, in the closed state of the packing box door, the lower door 1
9b is moved toward the inside of the packing box, and the seal members attached to the left and right sides of the lower door 19b and the left and right gate pillars (torii pillars)
24, and between the seal member 69 attached to the lower end of the lower door 19b and the underframe.

Next, the operation of the box lifting device will be described for the case where the box door is opened. FIG. 17 is an operation diagram of the device shown in FIG. 15, and shows a state where a 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, the operator operates the lower door 1 in the closed position.
When 9b is lifted beyond the dead point, the spring 7
(See FIG. 1) is extended, and the upper door 19a receives the urging force due to the elastic energy stored in the spring 7,
It jumps up by itself.

Referring to FIGS. 15 to 17, at this time,
The lower door 19b has a roller 71 attached to its lower end.
Rises while sliding on the guide surface 82 (see FIG. 19) in the gate post (post portion of the torii) 24. Here, the vertical position of the roller 71 is the upper door 1 as shown in FIG. 17 or FIG.
9a and the lower door 19b are fully folded, ie
Until the packing box is fully opened, the lower door 19
b is adjusted to be able to rise. In other words, by providing the roller position adjusting mechanism 72, when the packing box door is opened,
The roller 71 is prevented from being excessively pressed by the guide surface 82 and the opposing surface 83, or the roller 71 is separated from the guide surface 82 and the force acting on the lower door 19b in the upward direction is reduced. As a result, the lower door 19b
Is not raised sufficiently.

[0057]

The first effect of the present invention is that a large packing box volume can be secured because the structure of the packing box flipping device according to the present invention is compact. A second effect is that a large packing box volume can be secured because the operating radius of the packing box door lifting device according to the present invention is small.
A third effect is that durability of the packing box door flipping device according to the present invention is high because the operation is smooth and rattling is prevented. The fourth effect is that the third
Since the operating ranges of the arm and the shaft are mechanically ideal, the device can be made compact. The fifth effect is that the packing box door flipping device according to the present invention does not obstruct the packing box door or the device itself,
It can be easily attached from the side of the device. As a result, mounting workability is greatly improved, and cost reduction is achieved. A sixth effect is that the packing box door lifting device according to the present invention is mounted on a foldable packing box door, and the packing box door can be flipped up in a small space.

[Brief description of the drawings]

FIG. 1A is a side view of a packing box door flip-up device according to Embodiment 1 of the present invention, and FIG. 1B is a rear view of the packing box door excluding the packing box door.

FIG. 2 is an explanatory view of a mounting member of the packing box door flip-up device shown in FIG.

FIG. 3 is an operation diagram of the device shown in FIG. 1;

4A is a cross-sectional view taken along the line AA of FIG. 1A, FIG. 4B is a cross-sectional view taken along the line BB, and FIG.

FIG. 5D is a sectional view taken along the line DD in FIG. 1A.

FIG. 6 (E) is a view as viewed in the direction of the arrow E in FIG. 1 (A).

FIG. 7 is a side view of the packing box door flipping device according to the second embodiment of the present invention.

8 is an operation diagram of the device shown in FIG. 7;

FIG. 9A is a side view showing the operation of the cargo box door flip-up device according to the third embodiment of the present invention, and FIG. 9B is a rear view thereof.

FIG. 10A is a side view showing the operation of the cargo box door flip-up device according to the fourth embodiment of the present invention, and FIG. 10B is a rear view thereof.

FIG. 11 is a side view of a packing box flip-up device according to Embodiment 5 of the present invention.

FIG. 12 is an operation diagram of the device shown in FIG. 11;

13A and 13B are external views of various van-type trucks.

14A and 14B are external views of a van-type truck to which a packing box door flip-up device according to a second embodiment of the present invention is applied, FIG. 14A is a closed state of the packing box door, and FIG. ) Indicates the open state of the packing box door, respectively.

FIG. 15 is a side sectional view of a packing box door flipping device according to a second embodiment of the present invention.

16 (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).

17 is an operation diagram of the device shown in FIG.

FIG. 18 is an enlarged view of a main part of FIG. 17;

19 is a sectional view taken along line XX 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 Adjusting screw 10 Main body side plate 10a Spring cover mounting surface 11 First mounting 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, Torii beam 24 Gate, Torii Pillar 24c Lower part of gate pillar (torii pillar) 30 pin (pivot point) 31 pin (pivot point) 32 pin (pivot point) 33 pin (pivot point) 34 pin (pivot point) 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 part 54 Male screw rod 55 Female screw 56 Stopper 62 Second arm 63 Axis 64 Long hole plate 65 Long hole 66 Axis 67 V belt 68 Body side plate 69 Seal member 70 Intermediate hinge 71 Roller 72 Roller position adjusting mechanism 73 Bracket 74 , 74 Elongated hole 75, 75 Bolt 76 Bearing shaft 77 Horizontal plate portion 78 Convex portion 79 Roller position adjusting screw 80 Rib 82 Guide surface 83 Opposing surface

Claims (9)

[Claims] A packing box, a rotating packing box door, first to third arms disposed inside the packing box door, a shaft, and swinging the third arm and the shaft. A lever movably suspended, and elastic means, one end of the first arm is pivotally mounted inside the packing box door, and the second arm is mounted on the other end of the first arm. The other end of the second arm is pivotally attached to the packing box. The third arm is pivotally supported at an intermediate portion of the second arm. The other end of the third arm and the one end of the shaft are pivotally supported at the other end of the lever by the other end of the lever, whereby the third arm and the shaft are attached to the packing box. And the third arm and the shaft are pivoted by pivoting of the lever. The elastic means is connected to the other end of the shaft, and is elastically mounted so as to act between the other end of the shaft and the packing box. The elastic means rotates the packing box door. A vane-type truck packing box flip-up device, which expands and contracts by a stroke of the shaft accompanying the above, and generates a moment acting on the packing box door. 2. The apparatus according to claim 1, wherein said third arm, said lever, and said shaft are pivotally supported by pins. 3. The apparatus according to claim 1, further comprising: a main body side plate to which each member of the packing box door flip-up device is mounted; and one or more of the main body side plate fixedly or directly fixed to the packing box. The mounting member is attached to the mounting member by operating the main body side plate from the side in a state where the respective members of the packing box flip-up device are mounted on the main body side plate. Like
The cargo box for a van-type truck according to claim 1, wherein the cargo box extends along the inner wall of the cargo box toward the elastic means, and the attachment portion is formed at the extending portion. Door jumping device. 4. The first and second arms are pivotally supported on each other so as to be closed at a closed position of the packing box door and open at the same open position, and the second arm has a substantially triangular shape. Wherein the third arm is bent to extend around the pivot point of the second arm with respect to the packing box and extends toward the elastic means, and the lever is provided with the load of the lever. 4. The cargo box door lifting device for a van-type truck according to claim 1, wherein a pivot point with respect to a box is located above a pivot point of the third arm and the shaft. 5. An apparatus according to claim 1, further comprising a stopper for defining a maximum opening degree of said packing box door. 6. An axis connecting a connection point between the second arm and the third arm and a center of an action point of the elastic member with respect to the shaft from a closed position of the packing box door to a predetermined rotation position. More preferably, the pivot of the second arm is located on the roof side of the packing box, and an axis connecting the pivot of the packing box door and a connecting point of the first arm and the second arm is The van type truck according to any one of claims 1 to 5, wherein a pivot point of the first arm with respect to the packing box door is located inside the packing box. 7. The cargo box door includes an upper door pivotally attached to the cargo box, and a lower door pivotally attached to the upper door, wherein the upper door is opened when the cargo box is opened. And that the lower door is flipped up while being folded up with each other, one end of the first arm is pivotally mounted inside the upper door, and further formed inside a column of a gate post or a torii gate and extends in a vertical direction. Guide surface, and attached to the tip of the lower door,
A roller that slides on the guide surface with the opening and closing of the packing box door; and a roller that slides on the lower door so that the upper door and the lower door are sufficiently folded when the packing box door is fully opened. The van type truck according to any one of claims 1 to 6, further comprising a mechanism for adjusting a vertical mounting position. 8. A mechanism for adjusting a vertical mounting position of the roller with respect to the lower door, the mechanism comprising: a bracket attached to the lower door; an elongated hole formed in the bracket;
A fastening member for fastening the support shaft of the roller and the bracket via the elongated hole, a first screw portion formed on the bracket, a second screw portion formed on the support shaft, An adjusting screw screwed to the first and second screw portions, wherein the adjusting screw is operated to adjust a vertical mounting position of the roller with respect to the lower door. Item 7. A van type truck according to item 7. 9. A means for guiding the roller toward the inside of the packing box so as to move the lower door to the inside of the packing box at the closed position by guiding the rollers toward the inside of the packing box at the lower end inside the pillar or the gate of the torii gate. The van-type truck according to claim 7 or 8, wherein: