JP5604363B2 - Cargo box door device - Google Patents

Description

The present invention relates to a door device for a cargo box of a cargo vehicle.

In a freight vehicle such as a van type truck, an opening for loading and unloading is formed at the rear of the cargo box, and this opening is opened and closed by a double door or a folding door composed of two upper and lower door bodies. . The latter folding door is also referred to as a double flip-up door (folding door). For example, Patent Document 1 discloses an upper and lower folding door type door of a truck.

However, in the conventional upper and lower folding doors, the door weight is balanced by a counterweight having a weight substantially the same as the door weight and is manually opened and closed. Therefore, the door weight is equal to the truck load weight determined for the truck. Double the weight is included, and there is a problem that the truck load weight allowed for the actual load is reduced. Further, since the counterweight is moved up and down in a cylindrical portion provided in the vicinity of the opening, it is difficult to repair if the wire is cut.

In order to keep the cargo loaded in the cargo box in good condition during transportation and storage, the upper and lower folding doors are airtight so that rainwater, pride, exhaust gas, etc. do not enter the inside of the cargo box from the opening. Performance and water tightness are required. In addition, when an airtight structure / watertight structure is applied to the upper and lower folding doors, the airtight structure / watertight structure needs to be a structure that does not affect the door opening / closing operation.
Reality 02-42865

An object of the present invention is to solve the problems in the conventional vertical folding door.

The technical means adopted by the present invention are:
In a cargo box door device with a folding door comprising an upper door and a lower door, and a vertical position when the opening is closed and a folding position when the opening is open,
The upper end of the upper door is pivotally connected to the upper side of the opening,
The lower end portion of the upper door and the upper end portion of the lower door are connected so as to be rotatable,
The lower door is provided with guide rollers respectively guided by left and right guide rails provided on both sides in the width direction of the opening,
A winding shaft with a spring is arranged above the opening,
The wire connected to the shaft portion of the guide roller is wound around the winding shaft as the folding door moves upward, and the wire moves from the winding shaft as the folding door moves downward. It comes to be paid out,
The guide roller is located below the lower end surface of the lower door,
A cargo box door device for a cargo vehicle, wherein a watertight member is provided on the upper end, left and right sides of the upper door, the lower end and left and right sides of the lower door so as to be in close contact with the four sides of the opening when the opening is closed. .

In one aspect, in the apparatus,
A first draining piece extending over at least the entire width of the upper door is provided above the opening,
A second draining piece is provided on the upper door so as to cover the watertight member provided at the upper end of the upper door from the outside over the entire width of the upper door,
When the folding door is in a vertical posture, the first draining piece is positioned outside the second draining piece,
When the folding door is folded, the second draining piece that is inclined due to the tilting of the upper door is configured to be positioned below the first draining piece.
In one aspect, in the apparatus,
At the upper end of the upper door, a rotating piece extending over the entire width of the upper door is provided so as to cover the watertight member provided at the upper end of the upper door from the outside,
Provided on the upper side of the opening is a rotation receiving piece extending over at least the entire width of the upper door,
The upper end of the upper door is rotatably connected to the upper side of the opening by locking the rotating piece to the rotating receiving piece.
During the vertical posture of the folding door, the rotating piece is located outside the watertight member provided at the upper end of the upper door,
When the folding door is folded, the rotating piece is configured to be positioned so as to close a gap formed between the watertight member provided at the upper end of the upper door and the upper side of the opening from above. Yes.

In the present invention, since the weight of the folding door is balanced by the spring provided on the winding shaft for winding the wire, the entire door device is compared with the balance of the weight of the folding door using the counterweight. The weight can be reduced and the loading weight of the truck can be increased.
By positioning the guide roller provided on the lower door below the lower end surface of the lower door, it is possible to ensure a smooth opening / closing operation of the folding door while providing a watertight member around the folding door.
According to the second aspect of the present invention, by providing draining members on both the packing box side and the door device side, it is possible to prevent rain water from entering the packing box as much as possible when the door body is opened and closed. .
According to the third aspect of the present invention, since the rotating piece functions as a draining member, it is possible to prevent rain water from entering the packing box as much as possible when the door body is opened and closed without providing a separate draining member. be able to.

It is a schematic front view of the door device of the cargo box of the freight vehicle concerning the present invention. It is a schematic side view (opening closed state) of the door device of the cargo box of the cargo vehicle concerning the present invention. 1 is a schematic side view of a cargo box door device for a freight vehicle according to the present invention (a state in which a folding door is slightly refracted from an opening closed state). It is a schematic side view (opening state open state) of the door apparatus of the cargo box of the cargo vehicle concerning the present invention. It is a partially omitted horizontal sectional view of the lower door of the cargo box door device of the freight vehicle according to the present invention, the left side shows the lower end portion of the lower door, and the right side shows the cross section of the intermediate portion of the lower door. It is a partial side view which shows the downward part of the lower door of the door apparatus of the cargo box of the cargo vehicle which concerns on this invention. It is a partial top view of the door apparatus of the cargo box of the freight vehicle concerning the present invention. It is a schematic front view of the door apparatus of the cargo box of the freight vehicle concerning other embodiments of the present invention. It is a schematic side view (opening part closed state) of the door apparatus of the cargo box of the freight vehicle concerning other embodiments of the present invention. It is a schematic side view (opening state open state) of the door apparatus of the cargo box of the cargo vehicle concerning other embodiments of the present invention. It is a partial side view (opening part closed state) which shows the upper part of the door apparatus of the cargo box of the cargo vehicle concerning other embodiments of the present invention. It is a partial side view (opening state open state) which shows the upper part of the door apparatus of the cargo box of the cargo vehicle concerning other embodiments of the present invention. It is the partial side view which shows the center part of the door apparatus of the cargo box cargo box which concerns on other embodiment of this invention, a left figure is an opening part closed state, and a right figure has bent a little from the opening part closed state. Indicates the state. It is a partial side view (opening part open state) which shows the center site | part of the door apparatus of the cargo box of the cargo vehicle which concerns on other embodiment of this invention. It is a figure which shows the locking device of the door apparatus of the cargo box of the cargo vehicle which concerns on other embodiment of this invention, the upper figure is a partial front view, and the lower figure is a top view. It is a side view which shows the locking device of the door apparatus of the cargo box of the cargo vehicle which concerns on other embodiment of this invention. It is a side view which shows the latching rod of the locking device of the door apparatus of the cargo box of the cargo vehicle which concerns on other embodiment of this invention.

FIG. 1 is a front view of a door device that opens and closes an opening of a cargo box of a cargo vehicle, and FIG. 2 is a side view thereof. The packing box has a ceiling surface, left and right side walls, and a floor surface, and is formed in a rectangular shape from the upper frame 1, the left and right side frames 2, and the lower frame 3 at the opening at the rear end of the packing box. An open frame is provided. A door device is provided to open and close the opening formed by the opening frame.

The door device is a vertical folding door composed of two door bodies, an upper door 4 and a lower door 5. The upper door 4 has a rectangular shape when viewed from the front, and includes an upper end surface 40, a lower end surface 41, left and right side surfaces 42, and surface portions 43 and 44 respectively facing the inside and outside of the storage chamber. The lower door 5 has a rectangular shape when viewed from the front, and includes an upper end surface 50, a lower end surface 51, left and right side surfaces 52, and surface portions 53 and 54 respectively facing the inside and outside of the storage chamber.

The lower end surface 41 of the upper door 4 and the upper end surface 50 of the lower door 5 are connected so as to be able to bend using a hinge 45, and the upper door 4 and the lower door 5 form a folding door. In the opening-closed posture, the upper door 4 and the lower door 5 are in a vertical posture, and at this time, the lower end surface 41 of the upper door 4 and the upper end surface 50 of the lower door 5 are in contact or in close proximity. When the lower end side of the lower door 5 is moved upward from the vertical posture, the upper door 4 and the lower door 5 are folded so that the connecting portion of the upper door 4 and the lower door 5 protrudes outward, and the opening portion is opened. .

An upper end surface 40 of the upper door 4 is rotatably connected to the upper frame 1 of the opening using a hinge 400. In the illustrated embodiment, the rotation center 401 of the hinge 400 is located above the upper end surface 40 of the upper door 4 in the opening closed position and outside the surface portion 43 outside the upper door 4. At the time of opening (folding posture), the upper door 4 and the lower door 5 can be folded at a higher position to increase the effective opening height.

Guide rollers 6 are provided below the lower door 5 on both the left and right sides in the width direction of the lower door 5, and the guide rollers 6 are provided in guide rails 7 erected on the left and right sides in the width direction of the opening. Can be moved up and down. In particular, as shown in FIG. 6, the guide roller 6 is provided below the lower end surface 51 of the lower door 5, and the guide roller 6 provided in a lower part of the lower door 5 is provided when the opening is closed. In (vertical posture), it is located below the upper surface 30 of the lower frame 3. That is, the lower end of the guide rail 7 extends below the lower end surface 51 of the lower door 5 and the upper surface 30 of the lower frame 3 in the vertical posture, and when the opening is closed (vertical posture), The guide roller 6 is received by the guide rail 7 at a position below the lower end surface 51 and the upper surface 30 of the lower frame 3.

More specifically, the guide roller mounting brackets 8 are fixed to the lower portion of the inner surface portion 54 of the lower door 5 at both ends in the width direction, and the lower side of the bracket 8 is below the lower door 5. A roller shaft 60 having a guide roller 6 at its tip is supported horizontally at the lower end of the bracket 8 and extends downward beyond the end surface 51.

A spring built-in winding shaft 9 is supported on the ceiling surface of the packing box, close to the opening (close to the upper frame 1). The winding shaft 9 includes a bracket 90 provided on the ceiling surface, a shaft 91 rotatably supported by the bracket, a winding drum 93 that is fixed to a longitudinal end portion of the shaft 91 and winds the wire 92, The balance spring 94 has one end fixed to the bracket 90 and the other end fixed to the shaft 91. Thus, in this embodiment, it replaces with the conventional counterweight and the balance spring 94 balances the dead weight of a door body.

The lower end of the wire 92 is fixed to the roller shaft 60 of the guide roller 6 provided in the lower part of the lower door 5 (in the illustrated embodiment, the lower end of the wire 92 is fixed to the proximal end side of the roller shaft 60. When the opening of the upper door 4 and the lower door 5 is closed (vertical posture), the guide roller 6 is guided by the guide rail 7 as the folding door (the upper door 4 and the lower door 5) moves upward. The upper end of the wire 92 is wound around the take-up drum 93 of the take-up shaft 9, and the upper door 4 and the lower door 5 are moved up as a whole while being folded to be in a folding posture. Part is released. When the opening of the upper door 4 and the lower door 5 is opened (folded posture), the guide roller 6 is guided by the guide rail 7 as the folding door (the upper door 4 and the lower door 5) moves downward. The wire 92 taken up by the take-up drum 93 is pulled out downward, and the folded upper door 4 and lower door 5 are moved downward as a whole to be in a vertical posture and opened. The part is closed.

The winding surface of the winding drum 93 is tapered and a groove for positioning and guiding the wire 92 is formed, and the winding diameter of the wire 92 is made different depending on the position when the door body is opened and closed. When the valve moves up to the vicinity of the upper limit, the torque reduction of the balance spring is complemented. As shown in FIG. 1, when the opening is closed, the upper end side of the wire 92 is wound around the large-diameter portion of the winding drum 93, and the wire 92 is wound along the taper as the door body moves upward. It is wound up in the small diameter direction above.

Watertight members 10 </ b> A and 10 </ b> B are provided along the upper end surface 40 and the left and right side surfaces 42 of the upper door 4. The watertight members 10A and 10B are long members formed of rubber, for example, and the fins of the watertight members 10A and 10B are in close contact with the upper frame 1 of the opening frame and the upper half of the left and right side frames 2 when the opening is closed. By doing so, it demonstrates watertightness and airtightness.

Similarly, watertight members 10 </ b> C and 10 </ b> D are provided along the lower end surface 51 and the left and right side surfaces 52 of the lower door 5. The watertight members 10C and 10D are long members made of rubber, for example. When the opening is closed, the fins of the watertight members 10C and 10D are the lower frame 3 of the opening and the lower half of the left and right side frames 2 of the opening. Providing watertightness and airtightness when in close contact with parts.

The lower ends of the left and right watertight members 10B of the upper door 4 and the upper ends of the left and right watertight members 10D of the lower door 5 are in close contact (in the illustrated embodiment, the end portions of the respective watertight members are inclined at the corners of the four circumferences). Therefore, the watertight members 10A, 10B, 10C, and 10D are provided over the four circumferences of the door body (consisting of the upper door 4 and the lower door 5) in the vertical posture. When the opening is closed, the water-tight members 10A, 10B, 10C, and 10D are in close contact with the left and right side frames 2, the upper frame 1, and the lower frame 3 of the opening so Demonstrates performance and prevents rainwater and dust from entering the inside of the packing box. A watertight member (not shown) may be provided between the connection portion of the upper door 4 and the lower door 5, that is, between the lower end surface 41 of the upper door 4 and the upper end surface 50 of the lower door 5.

As described above, the guide roller 6 provided in the lower part of the lower door 5 is positioned below the lower end surface 51 (the upper surface 30 of the lower frame 3) of the lower door 5 when the opening is closed (vertical posture). doing. The lower end of the guide rail 7 extends below the lower end surface 51 of the lower door 5 (the upper surface 30 of the lower frame 3). When the opening is closed (vertical posture), the guide roller 6 of the lower door 5 is The door 5 is received by the guide rail 7 at a position lower than the lower end surface 51 (the upper surface 30 of the lower frame 3). In the present embodiment, the position where the guide roller 6 is provided is important for ensuring a smooth opening / closing operation of the folding door, as described below.

By positioning the guide roller 6 below the lower end surface 51 of the lower door 5, the watertight members 10 </ b> C and 10 </ b> D at the lower corner of the lower door 5, that is, the watertight members 10 </ b> D on the side surface 52 of the lower door 5. The lower end, both ends in the length direction of the watertight member 10C of the lower end surface 51 of the lower door 5 are prevented from interfering with the opening side frame 2 or the degree of interference is reduced. If the guide roller 6 is positioned above the lower end surface 51 of the lower door 5, the degree of interference between the lower corner portion of the lower door 5 and the opening side frame 2 is increased and smooth. This makes it difficult to open and close the water-tight member, and the water-tight members 10C and 10D need to be greatly cut out at the corners, thereby reducing the water-tightness and air-tightness. By positioning the guide roller 6 below the lower end surface 51 of the lower door 5, the interference between the lower corner portion of the lower door 5 and the opening side frame 2 can be eliminated or the degree of interference can be reduced. Even if the notch of the water-tight members 10C and 10D in the corner portion is not required, or even when the notch is necessary, it is possible to keep the notch small enough not to affect the water-tight performance and the air-tight performance.

In this embodiment, by providing draining members on both the packing box side and the door device side, intrusion of rainwater into the packing box as much as possible is possible both when the door body is opened and when it is closed. I try to prevent it. More specifically, a first drain piece 11 is provided on the upper frame 1 of the opening, and a second drain piece 12 is provided on the upper end portion of the upper door 4. The first draining piece 11 is a long member extending horizontally in the width direction over at least the entire width of the upper door 4, and has a length dimension larger than the width dimension of the upper door 4 in this embodiment. . The second draining piece 12 is a long member extending horizontally in the width direction over substantially the entire width of the upper door 4, and the upper door so as to cover the watertight member 10 </ b> A provided on the upper end surface 40 of the upper door 4 from the outside. 4 is provided. While the first draining piece 11 and the second draining piece 12 are provided close to each other to prevent rainwater from entering the cargo box, the first draining piece is opened when the upper door 4 is opened and closed. The shape and arrangement are such that the piece 11 and the second draining piece 12 do not interfere with each other.

The first draining piece 11 includes a horizontal piece 110 extending outward from the upper frame 1 and a vertical piece 111 depending from the tip of the horizontal piece 110. The second draining piece 12 includes a horizontal piece 120 extending outward from an upper portion of the outer surface portion 43 of the upper door 4, a vertical piece 121 rising from the tip of the horizontal piece 120, and a slightly outer end of the vertical piece 121. And a bent piece 122 that is bent into a bent shape.

In the vertical posture when the opening is closed, the finding surface of the upper frame 1 and the outer surface portion 43 of the upper door 2 are substantially flush, and the protruding dimension of the horizontal piece 110 of the first draining piece 11 is the second draining piece. The hanging piece 111 of the first draining piece 11 is located outside the vertical piece 121 of the second draining piece 12, and the hanging piece of the first draining piece 11 is larger than the protruding dimension of the twelve horizontal pieces 120. The height position of the lower end of the piece 111 substantially coincides with the height position of the upper end of the vertical piece 121 of the second draining piece 12. A bent piece 122 bent outward is formed at the upper end of the vertical piece 121 of the second draining piece 12, but the vertical piece 111 of the first draining piece 11 is formed of the bent piece 122 of the second draining piece 12. It is located further outside than the tip. That is, the protruding dimension of the horizontal piece 110 of the first draining piece 11 is larger than the protruding dimension of the horizontal piece 120 of the second draining piece 12 + the protruding dimension of the bent piece 122.

As described above, the protruding dimension of the horizontal piece 110 of the first draining piece 11 is larger than the protruding dimension of the horizontal piece 120 of the second draining piece 12, and the hanging piece 111 of the first draining piece 11 is the second draining piece 11. Since it is located outside the vertical piece 121 of the piece 12, the first draining piece 11 and the second draining piece 12 do not interfere when the upper door 4 is opened and closed. If the first draining piece 11 and the second draining piece 12 do not interfere during the opening / closing operation of the upper door 4, the height position of the upper end of the vertical piece 121 of the second draining piece 12 is set to the height of the first draining piece 11. You may overlap by making it located above the height position of the lower end of the hanging piece 111. FIG. The lengths of the horizontal piece 120 and the vertical piece 121 of the second draining piece 12 are set so that the upper end of the vertical piece 121 does not interfere with the upper frame 1 when the upper door 4 rotates outward when the opening is opened. Designed.

When the opening is closed (vertical posture), as shown in FIG. 2, the watertight member 10 on the upper end surface 40 of the upper door 4 is in close contact with the upper frame 1 and exhibits watertightness and airtightness. Further, by disposing the first draining piece 11 and the second draining piece 12, the watertight performance and the airtight performance of the upper part of the upper door 4 can be further ensured. When rainwater is blown upward from below, rainwater can be blown from below the vertical piece 111 of the first draining piece 11, but the vertical piece 121 of the second draining piece 12 and the upper end of the vertical piece 121. The bent piece 122 formed in the step prevents the blowing of rainwater as much as possible.

At the time of opening the opening (folding posture), the watertight member 10 on the upper end surface 40 of the upper door 4 is separated from the upper frame 1 to form a gap, but as shown in FIG. A vertical piece 121 of the inclined second draining piece 12 is positioned below the lower end of the hanging piece 111, and the rainwater dripping along the hanging piece 111 of the first draining piece 11 is applied to the inclined vertical piece 121. Since it is guided and escapes to the outer surface portion 43 of the inclined upper door 4, it is possible to prevent rainwater from entering when the opening is opened. Further, in the illustrated embodiment, the upper end side of the vertical piece 121 in the inclined posture enters the inside of the first draining piece 11, and the upper end of the bent piece 122 (in the rising posture) at the upper end is the first draining piece 11. It is located slightly above the lower end of the vertical piece 11 to prevent the blowing of rain water as much as possible.

The lower door 5 is provided with a lock device. A manual operation portion 13 for manually operating opening / closing of the folding door of the door device is provided on the outer surface portion 53 of the lower door 5, and the manual operation portion 13 also serves as an operation portion of the lock device. A locking rod 14 that can protrude in the width direction right and left along the surface portion 54 on the inner side of the lower door 5 is provided, and is configured to interlock the operation of the locking rod 14 with the operation of the operation portion of the locking device. When the opening is closed (vertical posture), the tip of the locking rod 14 protrudes into the guide rail 7 and is locked, thereby restricting the movement of the lower door 5 and preventing the door device from being opened.

A cargo box door device for a freight vehicle according to another embodiment of the present invention will be described with reference to FIGS. FIG. 8 is a front view of a door device that opens and closes an opening of a cargo box of a cargo vehicle, FIG. 9 is a side view thereof (opening portion closed state), and FIG. 10 is a side view thereof (opening portion open state). . About the same component, the same reference number is attached | subjected throughout the specification, The description which concerns on the above-mentioned embodiment can be used for description of the member to which the same reference number was attached | subjected.

The door device that opens and closes the opening at the rear end of the cargo box is an upper and lower folding door including an upper door 4 and a lower door 5 that are connected to be able to bend using a hinge 45. The upper end side of the upper door 4 is rotatably connected to the upper frame 1 of the opening, and guide rollers 6 are provided in the lower part of the lower door 5 on the left and right sides in the width direction of the lower door 5. Yes, the guide roller 6 can move up and down in guide rails 7 erected on both the left and right sides in the width direction of the opening. As shown in FIG. 9, the guide roller 6 is provided below the lower end surface 51 of the lower door 5, and the guide roller 6 provided in the lower part of the lower door 5 is closed when the opening is closed ( (Vertical posture) is located below the upper surface 30 of the lower frame 3. That is, the lower end of the guide rail 7 extends below the lower end surface 51 of the lower door 5 and the upper surface 30 of the lower frame 3 in the vertical posture, and when the opening is closed (vertical posture), The guide roller 6 is received by the guide rail 7 at a position below the lower end surface 51 and the upper surface 30 of the lower frame 3.

The lower end of the wire 92 is fixed to the shaft portion 6 ′ provided in the bracket 8 provided in the lower part of the lower door 5, and when the openings of the upper door 4 and the lower door 5 shown in FIG. 9 are closed (vertical posture). As the folding door (upper door 4 and lower door 5) moves upward, the guide roller 6 moves upward while being guided by the guide rail 7, and the upper end side of the wire 92 is the winding drum of the winding shaft 9. 93, the upper door 4 and the lower door 5 are folded and moved upward as a whole to a folding posture, and the opening is opened to the folding posture shown in FIG.

When the opening of the upper door 4 and the lower door 5 shown in FIG. 10 is opened (folding posture), the guide roller 6 moves to the guide rail 7 as the folding door (the upper door 4 and the lower door 5) moves downward. The wire 92 is moved down while being guided, and the wire 92 taken up by the take-up drum 93 is drawn downward, and the folded upper door 4 and lower door 5 are moved downward as a whole to move vertically. Thus, the opening is closed and the vertical posture shown in FIG. 9 is obtained.

A rotation configuration on the upper end side of the upper door 4 will be described with reference to FIGS. 11 and 12. A lower end side of the rotating piece 15 extending in the width direction over the entire width of the upper door 4 is fixed to an upper portion of the outer surface portion 43 of the upper door 4. The rotating piece 15 is provided in a take-out form from the outer surface portion 43 of the upper door 4 so as to cover the watertight member 10A provided at the upper end portion 40 of the upper door 4 from the outside. The rotary piece 15 extends upward in an inclined manner toward the outside so as to be separated from the lower vertical portion 150 at the lower end side fixed to the surface portion 43 and the lower surface portion 43 in a state where the upper door 4 is in a vertical posture. Inclined portion 151, further, upper upper portion 152 that extends above upper end surface 40 of upper door 4 and extends vertically while being spaced apart from watertight member 10 </ b> A, and bulges toward the surface portion of upper frame 1. A curved arc-shaped portion 153 on the upper end side, and the inner circumferential surface of the arc-shaped portion 153 is radially directed toward the outer side (side away from the surface portion of the upper frame 1). A locking portion 154 extending in a direction perpendicular to the plane) is formed. A small-diameter shaft portion extending in the width direction is integrally formed at the tip of the locking portion 154, and the shaft portion serves as a rotation center 401 ′ on the upper end side of the upper door 4. The rotation center 401 ′ is located above the upper end surface 40 of the upper door 4 in the opening closed position and outside the surface portion 43 outside the upper door 4, and when the opening is opened (folded position). The upper door 4 and the lower door 5 can be folded at a higher position to increase the effective opening height.

A rotation receiving piece 16 extending in the width direction over the entire width of the upper door 4 is fixed to the outer surface portion of the upper frame 1. The rotation receiving piece 16 includes an upper vertical portion 160 fixed to the outer surface portion of the upper frame 1, a horizontal portion 161 protruding outward from the lower end of the upper vertical portion 160, and a lower surface of the horizontal portion 161. An arc-shaped portion 162 that is curved so as to bulge toward the surface portion, and a locked portion 163 that hangs down from the lower surface of the horizontal portion 161 and is located outside the arc-shaped portion 162 are formed. . A groove portion extending in the width direction is formed on the surface of the locked portion 163 facing the arc-shaped portion 162, and the locked portion that rotatably receives the shaft portion of the locking portion 154 of the rotating piece 15. It has become. The outer diameter of the arc-shaped portion 153 of the rotating piece 15 and the inner diameter of the arc-shaped portion 162 of the rotating receiving piece 16 are the same, and the rotating piece 15 has an arc-shaped portion with the shaft portion as the rotation center 401 ′. The outer peripheral surface of 153 rotates while sliding on the inner peripheral surface of the arc-shaped portion 162 of the rotation receiving piece 16. The outer surface of the locked portion 163 is also a curved surface, and the outer surface of the locked portion 163 is inward of the arcuate portion 153 of the rotating piece 15 as the rotating piece 15 rotates upward. (See FIG. 12). When the tip (lower end) of the locked portion 163 of the rotation receiving piece 16 comes close to the inner surface of the arc-shaped portion 153 of the rotation piece 15 (see FIGS. 11 and 12), the arc-shaped portion of the rotation piece 15 The penetration of moisture into the inner surface of 153 is prevented as much as possible, and the moisture that has entered the inside of the arc-shaped portion 153 is further prevented from entering the interior by the locking portion 154.

On the base end side (upper end side) of the inner peripheral surface of the arc-shaped portion 162 of the rotation receiving piece 16, in other words, on the base end side (upper end side) of the surface facing the arc-shaped portion 162 of the locked portion 163 A groove portion extending in the width direction is formed, and the groove portion is filled with a watertight member 17. The watertight member 17 is made of, for example, a long rubber. In the closed state of the opening, the tip (upper end) of the arc-shaped portion 153 of the rotating piece 15 is in contact with the watertight member 17, and the inner surface of the outer peripheral surface of the arc-shaped portion 153 and the arc-shaped portion 162 of the rotating receiving piece 16. Prevents moisture from entering the periphery.

The outer peripheral surface of the arc-shaped portion 162 of the rotation receiving piece 16 is in contact with the outer surface portion of the upper frame 1, and the lower end of the inner peripheral surface of the arc-shaped portion 162 is separated from the outer surface portion of the upper frame 1. And located outside the watertight member 10A at the upper end of the upper door 4 in the closed state (see FIG. 11). Therefore, even if moisture oozes out between the outer peripheral surface of the arc-shaped portion 153 and the inner peripheral surface of the arc-shaped portion 162 of the rotation receiving piece 16, it is directly transmitted to the upper frame 1 and the watertight member 10A. There is no such thing.

In the closed state of the opening, the rotating piece 15 is provided outside the watertight member 10A at the upper end of the upper frame 1 and the upper door 4 so as to cover the entire width, and the upper frame 1 and the upper door 4 are covered. The water is prevented from entering the water-tight member 10A at the upper end. In the open state of the opening, a gap is formed between the upper frame 1 and the watertight member 10A at the upper end of the upper door 4. Since the gap formed between the upper frame 1 and the watertight member 10A at the upper end of the upper door 4 is closed from above, rainwater flows along the rotary piece 15 and the surface portion 43 of the upper door 4, and will be described later. It collects in the groove portion of the draining piece 19 to prevent rainwater from entering through the gap. Further, the outer surface of the locked portion 163 of the rotation receiving piece 16 is close to the inner surface of the arc-shaped portion 153, so that rainwater can be prevented from entering the arc-shaped portion 153 as much as possible. Moisture that has entered the inside of the portion 153 is prevented from further entering the inside by the locking portion 154. As described above, in this embodiment, the rotating piece 15 (the rotating receiving piece 16) functions as a draining member, so that the rainwater into the packing box can be opened or closed. I try to prevent the invasion of as much as possible.

In the opening closing posture where the upper door 4 and the lower door 5 are in the vertical posture, a gap is formed by the lower end surface 41 of the upper door 4 and the upper end surface 50 of the lower door 5 facing each other with a gap therebetween, The gap is closed by a cushioning material (for example, rubber packing) 18 attached to the lower end surface 41 of the upper door 4 (the left diagram in FIG. 13). The cushioning material 18 extends over the entire width of the upper door 4, and when the gap is blocked by the cushioning material 18, the lower end of the cushioning material 18 extends in the width direction to the upper end portion of the surface portion 53 outside the lower door 5. Since it has contact | abutted over, the water stop at the time of opening part closing is favorable. The gap has a size that prevents a finger from being caught between the lower end surface 41 and the upper end surface 50. When the upper door 4 and the lower door 5 are bent from a vertical posture, a space is formed between the lower end surface 41 of the upper door 4 and the upper end surface 50 of the lower door 5. In addition, even if a finger is inserted into the space, the flexible cushioning material 18 only hits the finger, and a sufficiently wide gap is formed inside the cushioning material 18. A finger is not pinched between the lower end surface 41 of the upper door 4 and the upper end surface 50 of the lower door 5 (see the right diagram in FIG. 13).

A draining piece 19 is attached to the lower end of the upper door 4 and is located outside and extends over the entire width of the upper door 4. The draining piece 19 is provided with a recessed groove having an opening on the upper side, and in the closed position of the opening, rainwater falling along the vertical surface portion 43 outside the upper door 4 is collected by the recessed groove, 4 and the upper end surface 50 of the lower door 5 are prevented as much as possible (see the left figure of FIG. 13). In the opening-opening posture, it is possible to collect the rainwater that falls along the inclined surface portion 43 outside the upper door 4 in the concave groove and drop it to the operator or luggage that will be positioned below. (FIG. 14). When closing the folding door in the open posture, rainwater adhering to the surface portion 43 of the upper door 4 flows down along the surface portion 43 and is collected in the groove of the draining piece 19. In the illustrated embodiment, the lower end portion of the upper door 4 and the upper end portion of the lower door 5 are respectively attached with edge members 41 ′ and 50 ′, and the hinge 45 is connected to the edge members 41 ′ and 50 ′. The cushioning material 18 is attached to the edge member 41 ′. In the closed position, the lower end of the cushioning material 18 contacts the edge member 50 ′, and the draining piece 19 is connected to the edge member 41 ′. It is integrally formed.

An operation handle 13 ′ for manually operating opening / closing of the folding door of the door device is provided on the outer surface portion 53 of the lower door 5, and the lower door 5 is moved upward by grasping the operation handle 13 ′ in the closed position. To open the opening. The operation handle 13 'also serves as the operation unit of the lock device. The operation handle 13 'can be turned up and down between an upper position (locked state) and a lower position (unlocked state), and the left and right locks are interlocked with the up and down rotation of the operation handle 13'. The rod 14 reciprocates in the horizontal direction. A more specific configuration will be described based on FIG. 15, FIG. 16, and FIG. The proximal end side of the operation handle 13 ′ is connected to the rotating cylinder 20, and left and right guide grooves 200 are formed in the rotating cylinder 20. A guide protrusion 141 projecting into the guide groove 200 is provided on the proximal end portion (slider) 140 of the left and right locking rods 14, and the guide protrusion 141 is formed in the guide groove 200 as the rotating cylinder 20 rotates. By being guided and moved in the horizontal direction, the locking rod 14 is guided by the rod guide 142 attached to the inner surface portion 54 of the lower door 5 and moved in the horizontal direction.

When the operation handle 13 ′ is in the upper position, the distal ends of the left and right locking rods 14 are in a locking posture in which they protrude into the guide rail 7, and in this upper position, the operation handle 13 ′ is the outer surface portion 53 of the lower door 5. It is held by holding means 21 provided in. More specifically, the holding means 21 is a fitting receiving portion, and when the operating handle 13 'is rotated to the upper position, the fitting portion 130 formed on the extension of the horizontal bar of the operating handle 13' is held. The means (fitting receiving part) 21 is detachably fitted. The holding of the upper position by the holding means 21 is released by manually rotating the operation handle 13 ′ at the upper position downward.

By lowering the operation handle 13 'downward from the upper position, the distal end of the locking rod 14 is retracted from the guide rail 7 to be in the unlocked posture. Therefore, when closing the folding door in the open position by grasping the operation handle 13 'and pulling it downward, a downward force acts on the operation handle 13', so the operation handle 13 'is in the middle of closing the folding door. Therefore, the locking rod 14 does not come into contact with the guide rail 7 in the upper position.

The locking device includes a key hole 22 facing outward, an L-shaped stopper 23 that rotates in conjunction with a rotation operation in which a key is inserted into the key hole 22, and a base end of the locking rod 14. And a contacted portion 24 provided on the side. When the locking device is in the locking posture, the key is inserted into the key hole 22 and the stopper 23 is rotated so as to come into contact with the contacted portion 24 provided on the proximal end side of the locking rod 14. The movement of the locking rod 14 in the direction of retracting from the guide rail 7 is restricted, and the downward rotation of the operation handle 13 ′ is restricted.

4 Upper door 5 Lower door 6 Guide roller 60 Roller shaft 7 Guide rail 9 Spring built-in winding shaft 92 Wire 93 Winding drum 94 Spring 10A to 10D Watertight member 11 First draining piece 12 Second draining piece 15 Rotating piece 16 times Moving piece

Claims (3)

In a cargo box door device with a folding door comprising an upper door and a lower door, and a vertical position when the opening is closed and a folding position when the opening is open,
The upper end of the upper door is pivotally connected to the upper side of the opening,
The lower end portion of the upper door and the upper end portion of the lower door are connected so as to be rotatable,
The lower door is provided with guide rollers respectively guided by left and right guide rails provided on both sides in the width direction of the opening,
A winding shaft with a spring is arranged above the opening,
The wire connected to the shaft portion of the guide roller is wound around the winding shaft as the folding door moves upward, and the wire moves from the winding shaft as the folding door moves downward. It comes to be paid out,
The guide roller is located below the lower end surface of the lower door,
On the upper end portion of the upper door, the left and right side portions, the lower end portion of the lower door, and the left and right side portions are provided with watertight members that are in close contact with the four circumferences of the opening portion when the opening portion is closed.
Cargo box door device. A first draining piece extending over at least the entire width of the upper door is provided above the opening,
A second draining piece is provided on the upper door so as to cover the watertight member provided at the upper end of the upper door from the outside over the entire width of the upper door,
When the folding door is in a vertical posture, the first draining piece is positioned outside the second draining piece,
At the folding position of the folding door, the second draining piece that is inclined due to the tilting of the upper door is located below the first draining piece,
A door device for a cargo box of a freight vehicle according to claim 1. At the upper end of the upper door, a rotating piece extending over the entire width of the upper door is provided so as to cover the watertight member provided at the upper end of the upper door from the outside,
Provided on the upper side of the opening is a rotation receiving piece extending over at least the entire width of the upper door,
The upper end of the upper door is rotatably connected to the upper side of the opening by locking the rotating piece to the rotating receiving piece.
During the vertical posture of the folding door, the rotating piece is located outside the watertight member provided at the upper end of the upper door,
When the folding door is folded, the rotating piece is positioned so as to close a gap formed between the watertight member provided on the upper end of the upper door and the upper side of the opening from above.
A door device for a cargo box of a freight vehicle according to claim 1.

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