JP2835737B2 - Rear gate device for lorry - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial applications]

 The present invention relates to a rear gate device for a truck.

2. Description of the Related Art A conventional rear gate device for a truck is disclosed, for example, in Japanese Utility Model Publication No. 61-16179. In this device, a tail gate vertical movement cylinder is provided near the rear end on the lower surface of the floor of the cargo bed, and a tail gate rotation cylinder is pivotally pivoted on guide rails formed on both vertical portions of the rear frame. A plurality of auxiliary plates mounted with the attached guide member so as to be vertically movable, connecting the guide member and the connecting rod of the vertical movement cylinder with a wire, and having a tail gate attached to the gate body and the gate body so as to be able to enter and exit the gate body. And the base end of the tailgate is pivotally attached to the lower end of the guide member by a support shaft,
Both ends of the support shaft and a connecting rod of the rotation cylinder are pivotally connected via a link.

[Problems to be solved by the invention]

In the rear gate device of this lorry, it is possible to open the tail gate horizontally, drive it to the lowermost position by the vertical operation cylinder, pull out the auxiliary plate from the gate body, and load a light vehicle such as a racing car. However, since the auxiliary plate is of a draw-out type from the gate body, there is a large step on the ground, and there is a problem that a horizontal car cannot be loaded unless an auxiliary road plate is used in a horizontal state. There is also a problem in that a rotating cylinder must be provided separately from the vertically moving cylinder for raising and lowering the gate body. Furthermore, when the tailgate is inclined and used as a loading road plate, even if the auxiliary plate is pulled out from the gate body and used, the loading angle is large and the loading of vehicles with recent low ground clearance is an auxiliary. There is a problem that it is impossible unless a road board is used. At this time, the auxiliary plate is pulled out of the gate body, and the load of the loaded vehicle applied to the auxiliary plate is concentrated on the tip of the gate body. In order to withstand this load, There is a problem that the gate body must be heavy and large. The present invention has been made in view of the above-mentioned conventional problems, and does not require a cylinder for rotating the rear gate other than the cylinder for raising and lowering the rear gate, and uses a racing car or the like without using an auxiliary road plate. Can be loaded in a horizontal state, and when loading with the tailgate inclined, the loading angle can be reduced to allow loading of vehicles with low ground clearance, and the sub-gate is also used as the main gate. An object of the present invention is to provide a rear gate device of a lorry in which an excessive load is not applied to a connection portion.

[Means for Solving the Problems]

The present invention provides a pair of left and right gate slide guide rails vertically arranged at both ends of a back end of a loading platform, a gate slider supported on each of the gate slide guide rails so as to be movable in a vertical direction, and lower ends of these gate sliders. A main gate pivotally supported via a pin in the width direction of the vehicle supported by the vehicle, and a pivotally supported pivotally at a tip end of the main gate, and folded over a front side surface of the main gate. A sub-gate that can be stored in a state that is inverted with the main gate flush with the main gate, and is supported by the main gate so as to be able to protrude and retract in the longitudinal direction from the tip of the main gate, and can support the sub-gate that is inverted when pulled out from below. A sub-gate support for adjusting and fixing the length of protrusion from the main gate; Substantially distal portion and the and the tension member is stretched between the gate slider upper portion, the gate slider upper end slider roller disposed in the vicinity of over bets,
An upper roller disposed near the upper end of the guide rail, one end connected to the main gate, a flexible tension member wound around the slider roller and the upper roller, and the other end side of the flexible tension member. Lifting drive means capable of being pulled, and fixing the gate slider to the guide rail,
The above object is achieved by configuring a rear gate device for a lorry comprising a slider stopper that can be released and a rear gate storage and fixing stopper that is capable of fixing the main gate to the carrier in a rear gate closed state. Things.

[Action]

In the present invention, the main gate is moved up and down and rotated by one lifting / lowering drive means. Further, when the sub gate pivotally supported at the tip of the main gate is opened, the sub gate pulled out from the main gate is opened. Since the sub-gate is supported from below by the support, and the sub-gate support is supported by a tension member such as a tension chain, the sub-gate is firmly fixed without applying an excessive load to the connecting portion between the main gate and the sub-gate. Can be supported. Further, since the sub gate is not retractable with respect to the main gate, it is not necessary to make the main gate excessively large. Further, a racing car or the like can be loaded horizontally without using an auxiliary road plate. In addition, even when the tailgate is loaded with an inclination, the subgate support is supported at its tip by a tension member such as a tension chain, so that it can withstand a large load and can be used as an auxiliary road plate and an auxiliary leg. By using the vehicle, it is possible to reduce the loading angle and easily load even a passenger car having a low ground height.

【Example】

Hereinafter, embodiments of the present invention will be described with reference to the drawings. In this embodiment, a pair of left and right gate slide guide rails 14 arranged vertically at the rear ends of a loading platform 12 of a lorry 10, and each of the gate slide guide rails 14 is supported movably in the vertical direction. A gate slider 16, a main gate 20 pivotally supported via a vehicle width direction pin 18 supported at the lower end of the gate slider 16, and a pivotable pivot at the tip end of the main gate 20. A sub-gate 22 that is pivotally supported on the front side of the main gate 20 and that can be in an inverted state flush with the main gate 20; A sub-gate support 24 supported by the main gate 20 and capable of supporting the inverted sub-gate 22 from below when pulled out; and a main gate 20 of the sub-gate support 24. A sub-gate stopper 26 for adjusting and fixing the protruding length thereof, a tension chain 28 stretched between a substantially distal end of the sub-gate support 24 and an upper end of the gate slider 16, and an upper end of the gate slider 16. A slider roller 30 arranged near, an upper roller 32 arranged near the upper end of the guide rail 14,
One end is connected to the main gate 20, and a roller chain 34 wound around the slider roller 30 and the upper roller 32.
Lifting drive means 36 capable of pulling the other end of the roller chain 34, and a slider stopper 38 capable of fixing and releasing the gate slider 16 to and from the guide rail 14.
And a rear gate storage fixed stopper capable of fixing the main gate 20 to the carrier 12 with the rear gate closed.
40 to form a rear gate device for a lorry. The gate slider 16 has a height approximately half the length of the main gate 20, and is provided with an upper roller 30A provided at an upper end thereof and a lower roller 30B provided at an intermediate position in the vertical direction, so that a gate slide guide rail is provided. It is supported slidably in the vertical direction within 14. The lower end of the gate slider 16 projects rearward from the guide rail 14, and the projecting portion pivotally supports the base end of the main gate 20 via the pin 18. The roller chain 34 has one end connected to the main gate.
20 are fixed to both side surfaces of the main gate 20 via adjusting bolts 34A at substantially middle positions in the longitudinal direction on both sides in the vehicle width direction. The roller chain 34 is wound around the slider roller 30 via guide rollers 34B disposed on both sides of the main gate 20 in the vehicle width direction, adjacent to the adjustment bolt 34A, and further disposed near the upper end of the guide rail. Via the upper roller 32, and a chain roller at the tip of the lifting drive means 36.
After being wound around 36A, it is fixed to the upper end of the guide rail 14. The lifting drive means 36 is composed of a hydraulic cylinder device, and the chain roller 36A is rotatably supported at the tip of a movable rod 36B of the lifting drive means 36. The sub gate 22 is connected to the main gate 2 via a hinge 22A.
It is pivoted at the tip of 0. As shown in FIG. 5, a spring 22B is attached to the hinge 22A.
Accordingly, the sub gate 22 is urged so as to have no load in the rotating direction at a substantially right angle to the main gate 20. Reference numeral 42A in FIG.
2 shows a fixing bolt for stably fixing in a folded state. The fixing bolt 42A can be screwed into a nut 42B provided substantially at the center of the main gate 20, as shown in FIG. Reference numeral 43 denotes an extruding spring attached to a position of the main gate 20 in contact with the guide rail. This is to make the main gate 20 smooth when it is opened, and to suppress mechanical contact between the main gate 20 and the guide rail 14 at the time of "closing" to prevent rattling. The sub-gate support 24 includes a pair of left and right slide frames 24A that can freely move in and out of the frame 20A at both sides of the main gate 20 in the vehicle width direction, and a cross that connects the tips of the pair of left and right slide frames 24A, 24A in the vehicle width direction. And a frame 24B. Here, the width of the sub-gate 22 is a pair of left and right slide frames 24A, 24A in the sub-gate support 24.
The width is smaller than the inner width between the sub-gates 22, so that the sub-gate 22 does not interfere with the slide frame 24 A when the sub-gate 22 is opened. As shown in FIG. 2, the cross frame 24B contacts and supports the lower surface of the sub-gate 22 opened clockwise in FIG. 2 from below, and the upper surface of the sub-gate 22 is flush with the upper surface of the main gate 20. The slide frame 24A is welded to the lower end surface of the front end of the slide frame 24A so as to be one. A chain hook 24C for hooking a tip hook 28A of the tension chain 28 is attached to both sides of the tip of the sub-gate support 24 in the vehicle width direction. The sub-gate stopper 24 adjusts the protrusion length of the sub-gate support 24 with respect to the sub-gate 22, and fixes the sub-gate stopper 26.
It is composed of a plurality of stop pin holes 21 provided in the frame 20A of the main gate 20, a stop pin hole 25 provided in the slide frame 24A of the sub-gate support 24, and a stop pin 44 inserted therein, and the plurality of stop pin holes of the frame 20A. Slide frame 24 for 21
By sliding the stopper pin hole 25 into the appropriate stopper pin hole 21 and inserting the stopper pin 44 at that position to restrain the sub-gate support 24, the projecting length of the sub-gate support 24 can be adjusted. It has been like that. Here, a riding road board hook 22C is provided at the tip of the sub gate 22. As shown in FIG. 4, the slider stop 38 is disposed below the rear end surface of the lorry 10, and projects from the lower end surface of the gate slider 16 at the closed position of the main gate 20 from the inside in the vehicle width direction. The stop pin 38A is configured to be engageable and retractable, a slider stop lever 38B for driving the stop pin 38A, and a link mechanism 38C connecting the both. The rear gate storage / stopper 40 is disposed on the back of the main gate 20, and is disposed on the gate slider guide rail 14 side when the main gate 20 is rotated to the closed position with the sub-gate 22 folded. Pin engagement hole 40
Rear gate stopper pin 40B removably attached to A
, A rear gate stopper lever 40C for driving the rear gate stopper pin 40B, and a link mechanism 40D for connecting the rear gate stopper lever 40C and the rear gate stopper pin 40B. Reference numeral 46 in FIG. 3 denotes a remote control switch for the lifting / lowering drive means 36, and reference numeral 48 denotes a boarding board supported on the side of the vehicle body. Next, the operation of the above embodiment will be described. First, as shown in FIG. 3, when the rear gate is closed, the rear gate stopper lever 40C of the rear gate storage fixed stopper 40 is pulled to release the main gate 20 from the gate slide guide rail 14, and the pin 18 Swingable. In this state, the remote control switch 46 is operated to extend the lifting / lowering drive means 36. In this case, since the roller chain 34 is fed, the main gate 20 tends to open to the position shown by the solid line in FIG. In this process, the elevation drive means 36 is temporarily stopped at a position where the main gate 20 is opened by about 80 °, and in this state, the sub-gate support 24 is pulled out, and the stop pin 44 is inserted into the predetermined stop pin hole 21 and the stop pin pin 25. , Main gate
Adjust the protruding length of the sub gate support 24 with respect to 20,
And fix it. This length is such that the main gate 20 and the sub-gate support 24 are at right angles to the gate slide guide rail 14 when the tension chain 28 is hung on the chain hook 24C at the tip of the sub-gate support 24. After fixing the sub-gate support 24 with the stop pin 44, the tension chain 28 is hung on the left and right chain hooks 24C. The other end of the tension chain 28 is connected to the gate slider 16.
Hang near the top. Next, the main gate 20 is moved by the remote control switch 46,
The main gate 20 is opened until it is perpendicular to the guide rail 14, and the main gate 20 is in a horizontal state. From here, the main gate 20 is controlled by the remote control switch 46.
Is slightly raised above the lifting drive means 36, the slider stop 38 is released, the stop pin 38A is retracted, and the gate slider 16 can be moved downward. Next, when the lifting / lowering drive means 36 is further extended by the remote control switch 46, the gate slider 16 is lowered along the guide rail 14 together with the main gate 20 to the position indicated by the two-dot chain line in FIG. Next, the sub-gate 22 is rotated clockwise from the state shown by the two-dot chain line to the state shown by the solid line in FIG. 2 by loosening the fixing bolt 42A for fixing the sub-gate. The lower side surface of the opened sub-gate 22 comes into contact with the cross frame 24B of the sub-gate support 24, and is maintained in a horizontal state at this position. Next, on the boarding road board 22C at the tip of the sub gate 22,
Hang the removable board 48, for example, a racing car
A lightweight vehicle such as 50 is loaded on the main gate 20 and the sub gate 22. Next, if the lifting drive means 36 is reduced while keeping these in a horizontal state, the roller slider 34 is retracted, so that the gate slider 16 moves the main gate 20 and the sub-gate 22 horizontally along the guide rail 14. As it is,
From an appropriate height position, the cargo is transferred to each deck (not shown) of the loading platform 12 of the lorry 10, and loading is completed. After the loading is completed, the main gate 20 and the sub gate 22 are returned to the positions shown by the solid lines in FIG. 2, the sub gate 22 is folded and fixed in the reverse order, the sub gate support 22 is retracted, and the tension chain 28 is retracted. The gate slider 16 is fixed by the slider stopper 38, and then the roller chain 34 is retracted by the lifting drive means 36. As a result, the main gate 20 is retracted to the state shown in FIG. 3, the gate is closed, and the entire operation is completed by fixing the main gate 20 with the rear gate storage fixing stopper 40. The above description relates to the operation when loading the racing car 50 or the like in a horizontal state. Next, as shown in FIG. 9, a case where a passenger car 52 having a low vehicle height is loaded will be described. In this case, the projecting amount of the sub-gate support 24 with respect to the main gate 20 is set to be shorter than that in the above case. Since the length of the tension chain 28 is not changed, the main gate 20 and the sub gate 22 are inclined downward as shown in FIG. Here, the gate slider is moved by the slide stopper 38.
Load passenger car 52 with 16 fixed. On the lower side of the tip of the sub-gate 22 inclined downward,
Place the auxiliary leg 56 on the ground 54 and subgate the board 48
A road plate with a gentle inclination as shown in FIG. Therefore, as shown in the figure, a passenger car 52 having a low vehicle height can be easily loaded. In the above embodiment, the sub-gate support 24 is supported by the tension chain 28 and the main gate
Although 20 is configured to be pulled up by the roller chain 34, the former need only be a tension member, and the latter may be a flexible tension member. Further, although the lifting / lowering drive means 36 is constituted by a hydraulic cylinder device, this may be, for example, a motor-driven screw.

【The invention's effect】

Since the present invention is configured as described above, it is possible to load a racing car or the like in a horizontal state without providing a cylinder device or the like for turning the rear gate and without using an auxiliary road plate, and it is heavy, In addition, even a low-height passenger car has an excellent effect that a gentle and robust road plate can be formed and easily loaded.

[Brief description of the drawings]

1 is a side view showing an embodiment of a rear gate device for a lorry according to the present invention, FIG. 2 is a side view showing a rear gate opened state in the embodiment device, and FIG. 3 is a side view showing the rear gate closed state. FIG. 4 is a rear view of the vehicle showing the rear gate in the embodiment, FIG. 5 is a plan view showing the opened and closed states of the sub-gate, FIG. 6 is an enlarged sectional view taken along the line VI-VI of FIG. FIG. 8 and FIG. 8 show the VII-VII line and VIII- line in FIG.
FIG. 9 is an enlarged sectional view taken along the line VIII, and FIG.
It is a side view showing the case where the rear gate was inclined. 10 ... truck, 12 ... carrier, 14 ... guide rail for gate slide, 16 ... gate slider, 18 ... pin, 20 ... main gate, 22 ... subgate, 24 ... subgate support, 26 ... ... Sub gate stopper, 28 ... Tension chain (tensile member), 30 ... Slider roller, 32 ... Top roller, 34 ... Roller chain (flexible tensile member), 36 ... Elevating drive means, 38 ... ... Slider stopper, 40 ... Rear gate storage fixed stopper.

Continuation of the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) B60P 1/43 B60P 1/46 B60P 1/26 B60P 1/44 B65G 69/28

Claims (1)

(57) [Claims] 1. A pair of left and right gate slide guide rails vertically disposed at both ends of a back portion of a loading platform, a gate slider supported by each of the gate slide guide rails so as to be vertically movable, A swingable pivotally supported main gate via a vehicle width direction pin supported at the lower end, and a swingably pivoted support at the front end of the main gate, and folding at a front side surface of the main gate. A stacked state, and a sub-gate that can be in an inverted state flush with the main gate, supported by the main gate so as to be able to protrude and retract in the longitudinal direction from the tip of the main gate,
A sub-gate support capable of supporting the inverted sub-gate when pulled out from below, a sub-gate stopper for adjusting and fixing a protruding length from the main gate,
A tension member stretched between a substantially distal end of the sub-gate support and an upper end of the gate slider; a slider roller disposed near the upper end of the gate slider; an upper roller disposed near the upper end of the guide rail; Is connected to the main gate, a flexible tension member wound around the slider roller and the upper roller, an elevating drive means capable of pulling the other end side of the flexible tension member,
A cargo comprising: a slider stopper capable of fixing and releasing the gate slider to the guide rail; and a rear gate storage fixing stopper capable of fixing the main gate to the carrier in a rear gate closed state. Rear gate device for automobiles.