JPH06916U - Carrier board device - Google Patents

Abstract

(57) [Abstract] [Purpose] It is possible to minimize the rearward protruding length of the holding portion to which the driving cylinder of the step board is connected, and to form the cargo bed length corresponding to this inhibition. In addition, the holding portion and the peripheral portion are structured so as not to be easily damaged. [Structure] In a walker device for a transporting vehicle, in which the left and right footboards at the rear end of the cargo bed can be raised and lowered by dedicated cylinders, the left and right footboards are undulated and rocked on the left and right shafts above the back surface of the cargo bed A rotatably supported shaft is provided, and a holding portion is provided below the rear surface of the platform below the side plate of the standing plate, and a rear end diagonally below the extension of the axis of the shaft in the holding portion. Section and the side surface of the walking board, a cylinder,
The cylinder base and the cylinder rod tip of the same cylinder are connected and installed.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a step board device for a carrier that is convenient for carrying and unloading construction machines such as bulldozers and various other industrial machines.

[0002]

[Prior art]

 There is a device illustrated in FIGS. 6 and 7 as a step plate device for a transporting vehicle in which the left and right step plates at the rear end of the platform can be raised and lowered by dedicated cylinders.

The structure of this device is such that the left and right step plates 53 are rotatably and oscillatably supported by the left and right shaft portions 52 on the upper side of the rear surface portion 51 of the luggage carrier 50. A holding portion 54 is provided so as to project below the rear surface portion 51 of the loading platform below 53a, and the tip of the cylinder rod 55a is connected to the rear end portion 54a of the holding portion 54, which is tilted rearwardly of the shaft portion 52 and is connected to the cylinder. The step plate 53 is connected to the step plate bottom portion 53a so that the step plate 53 stands up when the cylinder rod 55a moves forward, and the step plate 53 contacts the ground when the cylinder rod 55a moves backward.

By the way, since the location of the cylinder is on the bottom side of the step board, there is a problem that the connecting portion with the holding portion has to be lowered rearward. Specifically, when the walk board is erected or tilted forward, the cylinder hits the bottom surface of the walk board near the shaft and cannot be raised any further.

This problem causes an inconvenience that the length of the bed is limited to be short in order to make the length of the vehicle body conform to the standard. Furthermore, when the walking board is erected, the holding part and the cylinder are exposed to the rear so that there is a structural defect that is susceptible to external pressure and easily damaged.

[0006]

[Problem to be Solved by the Invention] The problem to be solved is that the connecting portion between the cylinder and the holding portion must be lowered rearward, and the length of the bed is limited. Further, when the step board is erected, the holding part and the cylinder are exposed in a protruding state to the rear, and there is a structural defect that is easily damaged by external pressure and easily damaged.

[0007]

[Means for solving the problem]

 In order to achieve the above-mentioned object, the present invention provides a left and right upper side of the rear surface of the loading platform in a walking platform of a transporting vehicle, in which the left and right walking plates at the rear end of the loading platform can be undulated and rocked by dedicated cylinders. Left and right walking boards are supported on the shaft so that they can be undulated and rocked, and a holding portion is provided below the side surface of the standing walking board below the rear surface of the luggage carrier. A cylinder extending from the rear end portion obliquely below the extension of the axis line of the section to the side surface of the step plate, and connecting the cylinder base and the cylinder rod tip of the cylinder. Characterize.

Further, the present invention relates to a walker board device for a transporting vehicle in which the left and right walkers at the rear end of the luggage carrier can be undulated and rocked by dedicated cylinders. Are mounted slidably to the left and right by the driving force of the cylinder, and the left and right step plates are respectively supported by the shafts on the upper side of the rear surface of the left and right movable bodies so that they can be undulated and rocked. A holding portion is provided so as to project below the rear surface portion of the movable body below the side surface portion of the plate, and a cylinder extends from the rear end portion obliquely rearward and downward of the extension line of the axis line of the shaft portion of the holding portion to the side surface portion of the walking board. The cylinder base and the cylinder rod tip of the same cylinder are connected and installed.

[0009]

[Action]

 The left and right step plates are rotatably and oscillatably supported on the left and right shafts on the upper side of the rear surface of the loading platform, and a holding section is projectingly provided below the side surface of the step plate in this standing state and below the rear surface of the loading platform. Since the cylinder is connected to the rear end part of the lower part of the shaft, which is obliquely rearward and downward of the extension of the axis of the shaft part, and the cylinder rod of the cylinder is connected to the side part of the step plate, the step plate drives the cylinder. It receives a force and can swing from the grounded state to the standing state or the forward leaning state without hitting the cylinder.The maximum forward leaning angle is the connecting shaft fulcrum of the holding part and the cylinder, the step plate and the cylinder. A straight line connecting the rod connection fulcrums can be obtained up to an angle that does not exceed the axis of the shaft, that is, the dead point.

[0010] Thereby, the protruding length of the holding portion to the rear can be suppressed to a minimum, and the length of the bed can be formed to be long for the amount corresponding to the suppression, and the holding portion and the peripheral portion are less likely to be damaged. You can

Further, the left and right movable bodies are appropriately slid to the left and right by a cylinder, and the left and right step plates pivotally supported by the movable bodies are individually or simultaneously slid so that the left and right positions and intervals can be freely adjusted. Can be adjusted to.

[0012]

【Example】

 Hereinafter, each embodiment of the carrier equipped with the step board device of the present invention will be described in detail with reference to the drawings.

In the transport vehicle of the first embodiment illustrated in FIGS. 1 and 3, the rear wheels 2 are moved by the movement of vehicle body stabilizing / floating jacks (not shown) arranged on the front left and right sides of the vehicle body 1. With the fulcrum as a fulcrum, the loading platform 3 can be tilted backward together with the vehicle body 1.

Then, the left and right step plates 6 are respectively rotatably and swingably supported on the left and right shaft portions 5 on the upper side of the rear surface portion 4 of the luggage carrier 3, and the side surface portions 6a of the step plate 6 in the standing state are supported. A holding portion 7 is projectingly provided on the lower side of the lower rear surface portion 4 of the loading platform, and a cylinder 8 is connected to a rear end portion 7a of the holding portion 7 which is obliquely rearward and downward from the extension line of the axis line of the shaft portion 5. In addition, the cylinder rod 8a of the cylinder 8 is connected to the step plate side surface portion 6a by the connecting shaft 10. When the cylinder rod 8a is moved forward, the step plate 6 keeps the forward tilted state, and the cylinder rod 8a The walk plate 6 is set to be in a grounded state when it moves backward.

A cylinder cover 11 is attached to a side surface portion 6a of the walk plate 6 on the cylinder connection side. When the walk plate 6 is tilted forward, it is located on the side of the loading platform 3 of the cylinder 8 and when the walk plate 6 is grounded. The upper sides of the cylinders 8 can be covered with cylinder covers 11.

A solenoid valve 15 is arranged between the pipes 13 and 14 connecting the cylinder 8 and the control valve 12, and the solenoid valve 15 is turned on as the cylinder rod 8a retracts until the step board 6 is grounded. Then, the pipes 13 and 14 are communicated with each other so that the output to the cylinder 8 can be bypassed between the grounding state of the walk plate 6.

As a result, the walk plate 6 receives the driving force of the cylinder 8 and can swing from the grounded state to the standing state or the forward leaning state without hitting the cylinder 8. Moreover, the maximum forward tilt angle is an angle at which the straight line connecting the fulcrum of the connecting shaft 9 between the holding portion 7 and the cylinder 8 and the fulcrum of the connecting shaft 10 between the step board 6 and the cylinder rod 8a does not exceed the axis of the shaft 5, that is, the dead point. Can get up to.

Along with this, the rearward protruding length of the holding portion 7 can be suppressed to a minimum, the length of the cargo bed 3 can be lengthened to the extent corresponding to this inhibition, and the holding portion 7 and the peripheral portion are damaged. Can be difficult.

By the cylinder cover 11 of the side part 6 a of the walk plate, the side of the bed 3 of the cylinder 8 when the walk plate 6 is tilted forward and the upper side of the cylinder 8 when the walk plate 6 is in contact with the ground are respectively provided. Since the cover is protected, the cylinder 8 is not damaged by a fallen object during loading and unloading.

Since the solenoid valve 15 is turned on while the step board 6 is grounded to bypass the output to the cylinder 8, the cylinder 8 is not damaged by the load applied to the step board 6 at the time of loading and unloading.

In the transport vehicle of the second embodiment illustrated in FIGS. 4 and 5, as in the case of the first embodiment, the vehicle body stability / floating jacks arranged on the left and right of the front portion of the vehicle body 1. Along with the operation of (not shown), the luggage carrier 3 can be tilted backward with the rear wheel 2 as a fulcrum.

A movable body 17 is slidably attached to the left and right guide portions 16 on the upper side of the rear surface portion 4 of the loading platform 3, and the tips of cylinder rods 18a of cylinders 18 provided on the left and right movable bodies 17 are rearwardly attached. It is connected to a protrusion 19 at the center of the surface portion 4, and the left and right movable bodies 17 slide left and right as the dedicated cylinder rod 18a moves forward and backward.

The left and right step plates 6 are respectively supported on the upper shaft portion 5 of the left and right movable bodies 17 so as to be capable of undulating and swinging, and below the side surface portions 6a of the step plate 6 in the standing state. On the lower side of the rear surface 17a of the movable body, a holding portion 7 is provided so as to project, and a cylinder 8 is connected to a rear end portion 7a of the holding portion 7 which is obliquely rearward and downward of an extension line of the axis of the shaft portion 5. In addition, the cylinder rod 8a of the cylinder 8 is connected to the step plate side surface portion 6a by the connecting shaft 10, and the step plate 6 keeps the forward tilted state when the cylinder rod 8a comes out. The walk board 6 is set to be in a ground contact state when the vehicle moves backward.

A cylinder cover 11 is attached to the side surface portion 6a of the walk plate 6 on the cylinder connection side. The cylinder cover 11 faces the side of the loading platform 3 of the cylinder 8 when the walk plate 6 is tilted forward, and when the walk plate 6 is grounded. The upper side of the cylinder 8 can be covered with a cylinder cover 11.

A solenoid valve 15 is provided between the pipes 13 and 14 connecting the cylinder 8 and the control valve 12, and the solenoid valve 15 is turned on as the cylinder rod 8a moves backward until the step board 6 is grounded. The two pipes 13 and 14 are communicated with each other so that the output to the cylinder 8 can be bypassed while the step board 6 is in the grounded state. (Because it has the same configuration as the first embodiment, illustration is omitted.)

As a result, the walk plate 6 receives the driving force of the cylinder 8 and can swing from the grounded state to the standing state or the forward leaning state without hitting the cylinder 8. Moreover, the maximum forward tilt angle is an angle at which the straight line connecting the fulcrum of the connecting shaft 9 between the holding portion 7 and the cylinder 8 and the fulcrum of the connecting shaft 10 between the step board 6 and the cylinder rod 8a does not exceed the axis of the shaft 5, that is, the dead point. Can get up to.

Along with this, the rearward protruding length of the holding portion 7 can be suppressed to a minimum, and the length of the loading platform 3 can be increased to the extent of this inhibition, and the holding portion 7 and the peripheral portion can be damaged. Can be difficult.

By the cylinder cover 11 of the side part 6a of the walk plate, the side of the bed 3 of the cylinder 8 when the walk plate 6 is tilted forward and the upper side of the cylinder 8 when the walk plate 6 is in contact with the ground are respectively provided. Since the cover is protected, the cylinder 8 is not damaged by a fallen object during loading and unloading.

Since the solenoid valve 15 is turned on while the step board 6 is grounded to bypass the output to the cylinder 8, the cylinder 8 is not damaged by the load applied to the step board 6 at the time of loading and unloading.

The left and right movable bodies 17 are appropriately slid to the left and right by the cylinder 18, and the left and right step plates 6 pivotally supported by the movable bodies 17 are individually or simultaneously slid to adjust their left and right positions and intervals. It can be adjusted freely.

In the above-described embodiment, the cylinders 8 and 18 may be arranged in opposite directions, and the other modes are free as long as the gist of the present invention is not changed.

[0032]

[Effect of device]

 A. According to the first aspect, the walk plate receives the driving force of the cylinder and can swing from the grounded state to the standing state or the forward leaning state without hitting the cylinder. In addition, the maximum forward tilt angle can be obtained up to an angle at which the straight line connecting the connecting shaft fulcrum of the holding part and the cylinder and the connecting shaft fulcrum of the step plate and the cylinder rod does not exceed the axis of the shaft, that is, the dead point. .

B. According to this paragraph, the rearward protruding length of the holding part can be suppressed to a minimum, the cargo bed length can be made longer for this suppression part, and the holding part and the peripheral part can be less likely to be damaged. it can.

C. According to claim 2, while having the above-mentioned effect, the left and right movable bodies are appropriately slid to the left and right with a cylinder, and the left and right step plates pivotally supported by the movable bodies are individually or simultaneously slid. Then, the left and right positions and intervals can be freely adjusted.

[Brief description of drawings]

FIG. 1 is a rear view of a main part illustrating a transportation vehicle according to a first embodiment equipped with a walk board device according to the present invention, with a part cut away.

FIG. 2 is an enlarged vertical cross-sectional view taken along the line II in FIG.

FIG. 3 is a hydraulic circuit diagram of a cylinder for driving the step board.

FIG. 4 is a rear view of a main part illustrating a transport vehicle according to a second embodiment equipped with a walk board device of the present invention, with a part cut away.

5 is an enlarged longitudinal cross-sectional view of the roller of FIG.

FIG. 6 is a rear view of a conventional walking device.

FIG. 7 is an enlarged vertical cross-sectional view of the harness shown in FIG.

[Explanation of symbols]

1 vehicle body 2 rear wheels 3 loading platform 4 rear surface of loading platform 5 shaft section 6 walking board 6a side surface of walking board 7 holding section 7a holding section rear end section 8,18 cylinder 8a, 18a cylinder rod 9,10 connecting shaft 11 cylinder Cover 12 Control valve 13, 14 Pipe 15 Solenoid valve 16 Guide 17 Movable body 19 Projection

Claims (2)

[Scope of utility model registration request] Claims: 1. A walker device for a transport vehicle, wherein left and right walkers at the rear end of the luggage carrier can be hoisted and oscillated by dedicated cylinders.・ A support is swingably supported, and a holding portion is projected below the rear surface of the platform below the side surface of the step board in the upright state.The holding portion is located diagonally below the extension of the axis of the shaft of the holding portion. A walk board device for a carrier, comprising a cylinder extending between a rear end portion and the side surface portion of the walk board, and connecting the cylinder base portion and a cylinder rod tip of the cylinder. 2. A walker device for a transporting vehicle, wherein left and right walkers at the rear end of the cargo bed can be lifted and rocked by dedicated cylinders, and a movable body is driven along the left and right guides on the upper side of the rear face of the cargo carrier to drive the cylinder. They are attached slidably to the left and right in response to forces, and the left and right step plates are supported by the shafts on the upper side of the rear surface of the left and right movable bodies so that they can undulate and swing. Of the movable body, a holding portion is provided below the rear surface portion of the movable body, and a cylinder is formed between the rear end portion of the holding portion, which is obliquely below and rearward of the extension of the axis of the shaft portion, and the step plate side surface portion. A step board device for a carrier, which is constructed by connecting the cylinder rod ends of the same cylinder as the bridge.