JP3965405B2 - Stopper device, load receiving table using the same, and load receiving device lifting device - Google Patents

Description

  The present invention relates to a stopper device provided on a load receiving base to receive a wheel such as a carriage, a load receiving base using the stopper device, and a load receiving lift device.

  In a freight vehicle, in order to support the work of loading the cargo on the loading platform installed in the vehicle and unloading the cargo on the loading platform to the ground, platform, etc. A cradle that is unfolded from the folded state, a lifting mechanism that moves the cradle up and down between, for example, the ground and the height of the cargo bed floor of the freight vehicle, and the folded cradle on the vehicle side or afterwards. It is equipped with a cargo receiving platform lifting / lowering device comprising a moving mechanism for moving it toward the direction.

  In the above-described loading platform elevating device, in order to suppress slipping of the loading cart from the loading platform, the loading platform has a stopper device for loading platform wheels that protrudes by rotating upward from the surface of the loading platform. Is provided. (For example, refer to Patent Document 1).

JP 2004-90876 A

  The above-described stopper device on the cradle is considered to be installed on the more distal side of the cradle in order to effectively secure a load space on the cradle. Due to the support structure of the dynamic fulcrum, there is a limit to installing the stopper device on the tip side of the load receiving table.

  In other words, the support structure of the rotation fulcrum of the stopper is generally a structure in which a bracket fixed to the load receiving side and a bracket fixed to the back side of the stopper are connected by a pin shaft. For this reason, the vertical dimension of this part is naturally restricted by the dimensions of the components described above.

  On the other hand, since the front end side of the load receiving table is thin, there is a limit to transfer the rotation fulcrum of the stopper in the stopper device described above to the front end side of the load receiving table.

  Further, as shown in Patent Document 1 described above, as a support structure for the rotation fulcrum of the stopper in the stopper device, a spherical surface portion is provided on the base side of the stopper, and the concave surface receiving portion that supports the spherical surface portion is a load receiving table. Although there is a structure provided on the side, in this case as well, for the same reason as described above, the rotation fulcrum of the stopper in the stopper device cannot be transferred to the front end side of the load receiving table.

  Therefore, even though there was a request to secure a sufficient effective use length on the receiving platform, the request could not be answered.

  The present invention has been made based on the above-mentioned matters, and provides a stopper device that can ensure a longer effective use length on the load receiving table, a load receiving table using the stopper device, and a load receiving table lifting device. Objective.

  In order to achieve the above-mentioned object, the present invention provides a stopper device in which a stopper for preventing sliding of a cart or the like is provided on a load receiving table equipped on a freight vehicle so as to be able to rise and fall. A pin shaft support body having a pin shaft support hole, a notch portion for avoiding interference with the pin shaft support body on a base side, and a pin insertion hole located on a side portion of the pin shaft support body A stopper provided with a bracket, and a pin shaft inserted into the pin insertion hole of the bracket and the pin shaft support hole of the pin shaft support body are provided.

  In addition, the second invention is a stopper device in which a stopper for preventing the carriage from falling down is provided on the load receiving table on the front end side of the load receiving table that is folded and stored at the rear side or the lower side of the cargo vehicle. A pin shaft support body provided on the tip-side load receiving base and having a pin shaft support hole, located on the base side, a notch portion for avoiding interference with the pin shaft support body, and a side portion of the pin shaft support body. A stopper provided with a bracket having a pin insertion hole, and a pin shaft to be inserted into the pin insertion hole of the bracket and the pin shaft support hole of the pin shaft support.

  Furthermore, the third invention is a stopper device in which a stopper for preventing the carriage and the like from sliding down is provided on the load receiving base on the tip side of the load receiving base that is folded and stored in the rear or lower side of the freight vehicle. A pin shaft support body having a pin shaft support hole provided on the front end side of the load receiver in the space of the load receiver on the front end side, and a notch portion on the base side to avoid interference with the pin shaft support body and the pin shaft A stopper provided with a bracket having a pin insertion hole located on a side of the support, and a pin shaft inserted into the pin insertion hole of the bracket and the pin shaft support hole of the pin shaft support. Features.

  According to a fourth aspect of the present invention, there is provided a cargo receiving platform including the stopper device according to any one of the first to third aspects of the invention.

  Further, the fifth invention is characterized by a cargo receiving platform lifting device including the stopper device according to any one of the first to third inventions.

  According to the stopper device of the present invention, since the rotation fulcrum of the stopper can be transferred to the tip side of the load receiving table, the effective use length on the load receiving table can be ensured longer. As a result, the load space for the load on the load receiving stand is increased, and the work efficiency of loading and unloading the load can be further improved.

  According to the load receiving platform and the load receiving platform lifting / lowering apparatus of the present invention, the effective use length on the load receiving platform can be secured longer, so that the work time for loading and unloading loads can be shortened.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of a stopper device of the present invention, a load receiving table using the stopper device, and a load receiving table lifting device will be described with reference to the drawings.

  FIG. 1 is a perspective view showing an overall configuration of an example of a freight vehicle provided with an embodiment of a stopper device of the present invention, a load receiving table using the stopper device, and a load receiving table lifting device. In this figure, reference numeral 1 denotes a freight vehicle. The freight vehicle 1 has a space for storing a load on a vehicle frame 4 behind a cab 3 constituting the chassis 2 in this example, and an open / close door 5 at the rear. A cargo bed 6 having

  In the lower rear part of the cargo vehicle 1 described above, a cargo receiving platform lifting device 100 is installed. The load receiving platform elevating device 100 folds the load receiving stand 7 during storage or the like and stores (accommodates) the load receiving stand 7 in the lower portion of the car frame 4, and slides and protrudes to the rear side of the car frame 4 when loading / unloading the cargo on the cargo bed 6. The load receiving platform 7 is moved up and down between the floor surface of the loading platform 6 and the ground to assist the loading and unloading of luggage and workers on the loading platform 6 according to the work.

  The load receiving platform lifting / lowering apparatus 100 includes a load receiving platform 7, a load receiving platform lifting / lowering drive unit 8 that lifts and lowers the load receiving platform 7 with respect to the vehicle frame 4, and the load receiving platform 7 and the load receiving platform lifting / lowering drive unit 8. It is comprised by the load receiving slide part 9 to which it moves back and forth in the rear part, its power source, an operation part, etc.

  A detailed configuration of the load receiving table lifting / lowering device 100 including the load receiving table 7, the load receiving table lifting / lowering drive unit 8 and the load receiving table slide unit 9 will be described with reference to FIGS. 2 and 3. FIG. 2 is a perspective view showing a detailed configuration of an embodiment of the load receiving table lifting / lowering device 100 including the load receiving table 7, the load receiving table lifting / lowering drive unit 8 and the load receiving table sliding unit 9, and FIG. 3 is a side view thereof. is there. In these figures, the same reference numerals as those in FIG. 1 denote the same parts.

  In these drawings, first, the structure of the cargo receiving slide 9 will be described. Reference numerals 10 and 10 denote front brackets fixed by bolts or the like at two locations in the front width direction of the vehicle 1 at the lower rear side of the vehicle frame 4; Reference numeral 11 denotes a rear bracket fixed by bolts or the like at two locations in the rear width direction of the vehicle 1 at the lower rear side of the vehicle frame 4, and 12 denotes a reinforcing beam provided between the front brackets 10 and 10. Reference numerals 13 denote support plates fixed to the lower portions of the front brackets 10 and 10, respectively.

  Reference numerals 14 and 14 are guide rails provided between the front bracket 10 and the rear bracket 11, respectively. These guide rails 14 and 14 extend along the front-rear direction of the vehicle 1 at two locations in the width direction (left and right) of the vehicle 1. Are arranged almost horizontally. The guide rail 14 is made of, for example, H-shaped steel.

  Reference numeral 15 denotes a slider provided so as to be movable along each guide rail 14, and the slider 15 is a slide pad that slides on the surface of the guide rail 14 so as to sandwich the guide rail 14 having an H-shaped cross section (or a U-shaped cross section). And a frame that supports the slide pad.

  Reference numeral 16 denotes a beam provided between the sliders 15, 17 denotes a support member for attaching a support roller provided at an interval in the width direction of the vehicle 1 so that the front end protrudes rearward of the vehicle, and 18 is rotatable to the front end of the support member 17. The support roller 18 supports the load receiving table 7 during storage and guides the operation of the load receiving table 7 when the load receiving table 7 is stored or deployed. Reference numeral 19 denotes a cylinder for operating the slider 15. The cylinder body is housed and fixed in the support member 17, and the tip of the piston rod is connected to the support plate 13 by a pin 20.

  Next, the configuration of the load receiving table elevating drive unit 8 will be described with reference to FIGS. 2 and 3. Reference numeral 21 denotes an inner base end frame, and the inner base end frame 21 is positioned outside the sliders 15. It is fixed to each. Reference numeral 22 denotes an outer proximal frame, and the outer proximal frame 22 is fixed to the beam 16 so as to be located outside the inner proximal frames 21. Reference numeral 23 denotes a first arm, and one end of the first arm 23 is rotatably connected to the inner base frame 21 by a pin 24. Reference numeral 25 denotes a second arm (lift arm). One end of the second arm 25 is connected to the first arm 23 by a pin 26, and the other end is connected to the base side of the load receiving platform 7 by a pin 27. Reference numeral 28 denotes a third arm (compression arm). One end of the third arm 28 is connected to the outer base end frame 22 by a pin 29, and the other end is connected to the base side of the load receiving platform 7 by a pin 30. 31 is a cylinder for operating the second arm 25. The base end of the cylinder body of the cylinder 31 is connected to the second arm 25 by a pin 32, and its piston rod is connected to the other end of the first arm 23 by a pin 33. Yes.

  Reference numeral 34 denotes a stopper bolt that defines a lower limit angle of the rotation range of the second arm 25, and the stopper bolt 34 has a lower end of the first arm 23 so as to contact a stopper portion 35 provided at the lower end portion of the inner base end frame 21. Provided in the department.

At this time, in FIG. 3, the base of the load receiving platform 7 is grounded, and the cylinder 31 is further retracted.
The first arm 23 is pulled to the base side of the load receiving platform 7 by the cylinder 31, and the angle formed by the first arm 23 with respect to the second arm 25 is small, and the base of the load receiving platform 7 is in the downward direction toward the rear. It is inclined to. However, in the state where the cylinder 31 is extended from the state of FIG. 3 and the stopper bolt 34 of the first arm 23 is in contact with the stopper portion 35 of the inner proximal frame 21, the second and third arms 25, 28 described above. Since the arrangement of the pins 26, 27, 29, and 30 constitutes the positional relationship of the apexes of the parallelogram, the upper surface of the load receiving platform 7 moves up and down while the second arm 25 is rotated by the cylinder 31. It is like that.

  A stopper bolt 36 defines an upper limit angle of the rotation range of the second arm 25. The stopper bolt 36 is arranged so that a stopper portion 37 provided in the vicinity of the proximal end portion of the second arm 25 is in contact with the inner base frame 21. Is provided at the upper end.

  Reference numeral 38 denotes a power unit. The power unit 38 is attached to one end of the beam 16 so as to be positioned on the side of the lower end of the rear end of the vehicle frame 4 in the freight vehicle 1 as shown in FIG. The power unit 38 includes a hydraulic pump and a plurality of control valves that switch and supply the pressure oil discharged from the hydraulic pump to the cylinder 19 for operating the slider 15 and the cylinder 31 for operating the second arm 25, respectively. At least built-in. The hydraulic pump is driven by power supplied from, for example, a generator or a battery of the freight vehicle 1.

  Reference numeral 39 denotes an operation unit, and the operation unit 39 is attached to the other end of the beam 16 so as to be located on the side of the lower end of the rear end of the vehicle frame 4 in the freight vehicle 1 as shown in FIG. By operating the operation button in the operation unit 39, an expansion / contraction operation signal is output to the power unit 38 to the cylinder 19 for operating the slider 15 and the cylinder 31 for operating the second arm 25.

  As shown in FIG. 2, the support member 17 of the support roller 18 is provided with a storage position sensor 40 that detects whether or not the tip end side of the folded load receiving platform 7 is in contact with the support roller 18. Yes. The storage position sensor 40 outputs this detection signal to a control device (not shown) when it is detected that the load receiving platform 7 is in contact with the support roller 18. As a result, the control device controls the power unit 38, and when the folded load receiving platform 7 is in a substantially horizontal state, the operation of the slider 15 is performed without further extending the operation cylinder 31 of the second arm 25. The cylinder 19 for operation of the slider 15 and the cylinder 31 for operation of the second arm 25 are interlocked and controlled so that the cylinder 19 for operation is retracted and the load receiving platform 7 is retracted and stored in the lower part of the vehicle frame 4.

  Next, the structure of the load receiving table 7 will be described. The load receiving table 7 includes a first load receiving member 41 on the vehicle side, and a second load receiving member connected to the first load receiving member 41 by a hinge 42. 43 and a third load receiving member 45 connected to the second load receiving member 43 by means of a hinge 44. When the freight vehicle 1 is traveling, As shown in FIGS. 2 and 3, the cargo is received by contacting the stoppers 46 and 47 so that the cart 7 can be mounted on the cargo receiving surface side of the platform 7 and loaded with a cargo or a cart with casters. It is developed so that the surface side becomes a plane.

  A stopper device 48 is provided on the third load receiving member 45 located on the front end side of the load receiving table 7 so as to be raised and lowered. This stopper device 48 prevents the movement of the wheels provided on the carriage to the rear of the freight vehicle. Is prevented from slipping off from the load receiving platform 7. A detailed configuration of the stopper device 48 will be described with reference to FIGS. FIG. 4 is a plan view showing a part of the center of a third load receiving base member 45 provided with an embodiment of the stopper device of the present invention in a partial cross section, and FIG. 5 is a cross section seen from the arrow VV in FIG. FIG. 6 and FIG. 6 are sectional views as seen from the direction of arrows VI-VI in FIG. 4 to 6, the same reference numerals as those shown in FIGS. 1 to 3 are the same parts.

  4 and 5, 49 is a space for storing a stopper or the like, and this space 49 is opened in the width direction of the third load receiving base member 45 in the load receiving base 7 so that the upper side thereof is opened (in FIG. 5). It is formed along a direction perpendicular to the paper surface.

  Reference numeral 50 denotes a pin shaft support body having a pin shaft support hole 51, and the pin shaft support body 50 is fitted into a protrusion 52 for preventing movement formed in the bottom of the tip side of the third load receiving member 45 in the space 49. And are fixed by bolts 53.

  Reference numeral 54 denotes a stopper for receiving a traveling wheel such as a caster or a wheel of the carriage, and a base end of the stopper 54 (right side position in FIG. 5) is located on both sides of the pin shaft support 50 and has a pin shaft insertion hole 55. A bracket 56 is provided, and a spring receiving collar 57 is provided on the tip side (left side in FIG. 5). 58 is a pin shaft inserted into the pin shaft support hole 51 of the pin shaft support body 50 and the pin shaft insertion hole 55 of the stopper 54, 59 is a pin for preventing the pin shaft 58 from coming off in the axial direction. The third load receiving member 45 is inserted and fixed so as to be positioned on the end surface of the pin shaft 58. Reference numeral 60 denotes a cushion member at the tip of the flange portion 57 provided at the bottom of the space 49.

  61 is a spring for raising the stopper, and this spring 61 is provided between the space 49 and the flange portion 57 of the stopper 54. Normally, the spring 61 is in a compressed state by pressing and fixing the stopper 54 to the load receiving platform 7. The stopper 54 is fixed to the load receiving table 7 by appropriate fixing means provided on the load receiving table 7.

  62 is a notch formed on the base end side of the stopper 54, and this notch 62 interferes with the pin shaft support 48 when the stopper 54 erected from the upper surface of the load receiving table 7 is lowered to the load receiving table 7 side. It is for avoiding.

  Since the pin shaft support 50 described above has an appropriate length in the axial direction of the pin shaft support hole 51 to ensure the pin shaft support area, the thickness in the vertical direction can be reduced. Is possible. As a result, the installation location of the pin shaft support 50 in the space 49 for storing the stopper can be set closer to the distal end side of the third load receiving base member 45. As a result, the load receiving stand 7 can ensure the length from the first load receiving stand member 41 to the stopper device 48 in the load receiving stand 7, that is, the effective length of the load receiving stand longer on the surface of the load receiving stand 7.

Next, the operation of one embodiment of the stopper device of the present invention described above, a load receiving table using the stopper device, and a load receiving table lifting device will be described with reference to the drawings.
As shown in FIG. 1, in order to shift from the state in which the cargo receiving platform 7 is folded and stored to the lower rear side of the freight vehicle 1 to the working state, first, a predetermined operation is performed by the operation unit 39, The piston rod of the cylinder 19 in the load receiving slide 9 is extended to move the slider 15 along the guide rail 14 toward the rear of the freight vehicle, and the load receiving stand 7 and the load receiving lift drive unit 8 are moved to the freight vehicle 1. Project backwards.

  Next, the piston rod of the cylinder 31 in the load receiving table raising / lowering drive unit 8 is contracted, and the second arm (lift arm) 25 is rotated clockwise in FIG. 3 to ground the first load receiving member 41 of the load receiving table 7. Let During this transition operation, the load receiving platform 7 supported by the support roller 18 rolls to the support roller 18 while being folded, and gradually follows the support roller 18 from a substantially horizontal state to the freight vehicle. Stands up to the back of the car and stands up to a state where it can be easily deployed manually.

  When this state is reached, the load receiving platform 7 is unfolded. First, a grip (not shown) provided on the back surface of the second load receiving platform member 43 of the load receiving platform 7 is pulled to place the second load receiving platform member 43 in a substantially horizontal state. Expand to. Next, a grip (not shown) provided on the back surface of the third load receiving base member 45 is pulled, and the third load receiving base member 45 folded on the second load receiving base member 43 is developed in a substantially horizontal state.

  Next, the piston rod of the cylinder 31 is shrunk so that the entire load receiving table 7 is inclined downward toward the rear of the freight vehicle 1, and the tip of the third load receiving table member 45 of the load receiving table 7 is placed on the ground. Close to. Thereby, as shown in FIG.2 and FIG.3, the load receiving stand 7 is maintained in the state which can load a load with a cart etc. on the load receiving surface. In this state, after the carriage is loaded on the load receiving platform 7, when the fixing means of the stopper device 48 is released, the stopper 54 is rotated around the pin shaft 58 by the urging force of the spring 61 as shown by a two-dot chain line in FIG. To stand up and protrude upward from the load receiving surface of the load receiving platform 7. By bringing the wheel of the carriage into contact with the standing stopper 54, the carriage can be placed on the load receiving platform 7 so as not to slide down from the load receiving platform 7.

  When the carriage is placed on the load receiving platform 7, the rotation fulcrum of the stopper 54 is installed by shifting to the tip side of the third load receiving table member 45 in the load receiving platform 7, and the effective length of the load receiving platform is made longer. Since the setting is made, the loading space on the receiving platform 7 can be further increased.

  When the load is loaded on the load receiving platform 7, the load receiving platform lifting / lowering drive unit 8 is driven by the operation unit 39, so that the load receiving platform 7 rises to the floor surface of the load receiving platform 6 of the cargo vehicle 1 set in advance and stops. Thereby, the cart on the loading platform 7 can be carried into the loading platform 6.

  When further loading is performed after loading, the loading table 7 is lowered, and then the stopper 54 is housed and fixed on the loading table 7, and the above operation is repeated, whereby loading or unloading and loading table are performed. 7 can be stored.

  In the above-described embodiment, the pin shaft support 50 that contributes to securing a longer effective length of the load receiving base is fixed to the load receiving base 7 with the bolts 53. The pin shaft support 50 is fixed to the load receiving base 7. It is also possible to form it integrally in the void 49.

  Further, in the above-described embodiment, in order to prevent dirt and the like from being caught in the gap between the notch portion 62 formed at the base end of the stopper 54 and the side surface of the pin shaft support 50, the notch portion 62 and the pin shaft It is also possible to provide a seal on the side surface of the support 50.

  In the above-described embodiment, the case where the present invention is applied to the retractable load receiving device lifting device that can be accommodated in the lower part of the rear portion of the freight vehicle frame has been described as an example. It is also applicable to. For example, there is a type in which the load receiving stand erects vertically during housing to form the rear side surface of the load receiving platform of the vehicle, while the load receiving stand is moved up and down in the vertical direction while maintaining a horizontal state during work. . Further, even if the load receiving platform is lifted and lowered via the parallel link in the same manner as the load receiving platform lifting device of the present embodiment, the load receiving platform is not housed on the lower side of the vehicle frame, but the rear side surface of the vehicle loading platform. Some take a stowed posture to stand vertically along. Thus, for example, the present invention is applicable to any load receiving device lifting device provided at the rear of the loading platform of a freight vehicle such as a van type truck, without being limited to its lifting method or accommodation method. In addition, there is a type in which the load receiving platform elevating device is installed on the side portion of the freight vehicle. Of course, the present invention can also be applied to such a load receiving platform elevating device. When the present invention is applied to the above, the same effect as described above can be obtained.

  As described above, according to the embodiment of the stopper device of the present invention, since the rotation fulcrum of the stopper can be shifted to the tip side of the load receiving table, the effective use length on the load receiving table is secured longer. can do. As a result, the load space for the load on the load receiving stand is increased, and the work efficiency of loading and unloading the load can be further improved.

  Further, according to the embodiment of the load receiving device and the load receiving device lifting / lowering device of the present invention, the effective use length on the load receiving table can be secured longer, so that the work time for loading and unloading of the load can be reduced. It can be shortened.

It is a perspective view showing the whole structure of the freight vehicle provided with the stopper device of the present invention, a load receiving stand using the same, and a load receiving stand lifting device. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view illustrating a stopper device according to an embodiment of the present invention, a load receiving table using the stopper device, and a load receiving device lifting / lowering device according to an embodiment of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a side view of a stopper device according to an embodiment of the present invention, a load receiving table using the stopper device, and a load receiving device lifting / lowering device according to an embodiment of the present invention. It is a top view which shows the cargo receiving stand center part provided with one Embodiment of the stopper apparatus of this invention in a partial cross section. It is sectional drawing which looked at one Embodiment of the stopper apparatus of this invention from the VV arrow shown in FIG. It is sectional drawing which looked at one Embodiment of the stopper apparatus of this invention from the VI-VI arrow view shown in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Cargo vehicle 3 Driver's cab 4 Car frame 6 Loading platform 7 Loading platform 8 Loading platform lifting / lowering drive section 9 Loading platform slide section 41 First loading platform member 43 Second loading platform member 45 Third loading platform member 48 Stopper device 49 Empty 50 Pin shaft support 54 Stopper 58 Pin shaft 61 Spring 62 Notch 100 Lifting device for loading platform

Claims (5)

  In a stopper device provided with a stopper capable of raising and lowering on a load receiving table equipped on a cargo vehicle so as to prevent falling, a pin shaft support body having a pin shaft support hole provided on the load receiving table, and a base side A stopper provided with a notch for avoiding interference with the pin shaft support and a bracket having a pin insertion hole located on a side of the pin shaft support, the pin insertion hole of the bracket, and the pin shaft support A stopper device comprising a pin shaft inserted into a pin shaft support hole of a body.   A stopper device provided with a stopper capable of raising and lowering a carriage or the like on a tip side of a load receiving base that is folded and stored in the rear or lower side of a freight vehicle. A pin shaft support having a pin shaft support hole, a notch portion for avoiding interference with the pin shaft support on the base side, and a bracket having a pin insertion hole located on a side portion of the pin shaft support. A stopper device comprising: a stopper provided; and a pin shaft to be inserted into a pin insertion hole of the bracket and a pin shaft support hole of the pin shaft support.   In a stopper device provided with a stopper capable of raising and lowering a trolley or the like on the load receiving table at the tip side of the load receiving table that is folded and stored at the rear or lower side of the cargo vehicle, A pin shaft support body having a pin shaft support hole, a base portion, a cutout portion for avoiding interference with the pin shaft support body, and a side portion of the pin shaft support body. A stopper device comprising: a stopper provided with a bracket having a pin insertion hole; and a pin shaft to be inserted into the pin insertion hole of the bracket and the pin shaft support hole of the pin shaft support.   A load receiving table comprising the stopper device according to any one of claims 1 to 3.   A load receiving table lifting device comprising the stopper device according to any one of claims 1 to 3.

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