JP2009149245A - Movable step device of vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve a step getting-on/off property such as the cabin getting-on/off property of a movable body, and to prevent damage from being received when a vehicle travels on a bad road. <P>SOLUTION: A movable step device is provided with a second step fixed to the movable body, a first step located on a lower side of the second step in the longitudinal direction of the movable body, and a supporting member mounted between the second step and the first step to be separated in the longitudinal direction of the movable body. The second step is constituted of a step provided with a hole part passing through the supporting member and supporting the supporting member. The supporting member on the side of a front part of the movable body is constituted of a member having flexibility. The supporting member on the side of a rear part of the movable body is constituted of a rodlike member. The member having flexibility bends when the first step hits on an obstacle in traveling on the bad road to generate a free rotating motion in the first step. In the rodlike member, one end part is passed through the hole part of the second step, and the one end is supported by a tread surface side of the second step. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a step of a moving body, for example, a step device for getting in and out of a cabin of a large truck.

  In order to improve ease of getting on and off under the use condition of a large truck, the ground clearance of the first step (bottom step) when entering the cabin is better.

  On the other hand, when considering bad road running ability, it is necessary to take measures such as using large tires and raising the ground clearance of the cabin. If the cabin entrance / exit rises, you will have to step up accordingly.

  To meet this conflicting requirement, the ground clearance in the first step was to find a compromise.

  2. Description of the Related Art Conventionally, as this type of vehicle step-on / off step device, for example, one disclosed in Patent Document 1 is known.

  In the vehicle boarding / alighting step device disclosed in Patent Document 1, the support shaft fixed to the lower surface of the boarding step is rotatable to a bracket fixed to the lower surface of the cab frame at the front and rear of the vehicle. The board is inserted and the step for getting on and off is configured to be swingable with respect to the traveling direction with the support shaft as a fulcrum.

And according to the step device for boarding / alighting of the vehicle disclosed in the cited document 1, the step for getting on / off is provided so as to be swingable so as to be always kept in a horizontal state, and the step for getting on / off is fixed when the door for getting on / off is opened. Is possible.
Japanese Utility Model Publication No. 63-93246

  However, the vehicle stepping-on / off device disclosed in Patent Document 1 requires a special fixing device in order to make the boarding / exiting step swingable with respect to the traveling direction about the support shaft.

  In addition, since the bracket for rotatably inserting the support shaft is fixed to the lower surface of the cab frame at the front and rear of the vehicle, the bracket collides with an obstacle when the road is broken and the support shaft is broken. There was a possibility of being unable to rotate.

  For this reason, in the vehicle stepping-on / off device disclosed in the cited document 1, the ground height of the step-on / off step cannot be lowered to improve the boarding / exiting performance.

  The present invention has been made to solve such a conventional problem, and an object of the present invention is to provide a movable step device for a vehicle capable of improving the step boarding / alighting property of a moving body, for example, the cabin boarding / alighting property. It is to provide.

  Another object of the present invention is to provide a movable step device for a vehicle that can prevent damage during running on a rough road.

  The invention according to claim 1 includes a second step fixed to the moving body, a first step positioned below the second step in the front-rear direction of the moving body, and a front-rear direction of the moving body. A support member mounted between the second step and the first step, wherein the second step includes a step of providing a hole that penetrates and supports the support member, and the movable body The support member on the front side of the movable body is configured by a flexible member, the support member on the rear side of the movable body is configured by a rod-shaped member, and the flexible member is formed by the first step. When the vehicle hits an obstacle on a rough road, it bends and causes the first step to freely rotate, and the rod-like member penetrates one end of the hole of the second step, and the step of the second step. The one end is supported on the surface side. To.

  The invention according to claim 2 includes a second step fixed to the vehicle body or the cabin, a first step positioned below the second step in the longitudinal direction of the vehicle body or the cabin, and the longitudinal direction of the vehicle body or the cabin. And a support member mounted between the second step and the first step, wherein the second step comprises a step of providing a hole that penetrates and supports the support member, The support member on the front side of the vehicle body or the cabin is configured with a flexible member, the support member on the rear side of the vehicle body or the cabin is configured with a rod-shaped member, and the flexible member is: When the first step hits an obstacle when traveling on a rough road, it bends and causes the first step to freely rotate, and the rod-shaped member penetrates one end of the hole of the second step, The one end in the tread side of the second step is characterized in that it is supported.

  The invention according to claim 3 is the movable step device of the vehicle according to claim 1 or 2, wherein the flexible member is a chain covered with cylindrical rubber, a metal wire, a piano wire, a metal It is characterized by comprising at least one of coil springs.

  According to a fourth aspect of the present invention, in the movable step device for a vehicle according to any one of the first to third aspects, the rod-shaped member is pivotable while one end portion thereof penetrates the hole of the second step. The other end is supported by the first step.

  According to a fifth aspect of the present invention, in the movable step device for a vehicle according to any one of the first to third aspects, one end of the rod-shaped member is supported through the hole of the second step. The end is supported by the first step via a hinge.

  According to a sixth aspect of the present invention, in the movable step device for a vehicle according to any one of the first to third aspects, the rod-shaped member is pivotable while one end portion thereof penetrates the hole of the second step. The other end is supported by the first step via a hinge.

  The invention according to claim 7 is the movable step device of the vehicle according to any one of claims 1 to 6, characterized in that a displacement absorbing portion is provided between the rod-shaped member and the second step. .

  According to an eighth aspect of the present invention, in the movable step device of the vehicle according to the fourth or sixth aspect, the pivotable support of the bar-shaped member and the second step includes the bar-shaped member and the second step. It is characterized in that it is configured through a spherical part mounted on one end of the rod-shaped member.

  The invention according to claim 9 is the movable step device of the vehicle according to claim 7, wherein the displacement absorbing portion is a washer provided on the rod-shaped member, a movable washer movably disposed on the rod-shaped member, and the washer. And a coil spring disposed between the movable washer and the movable washer.

  Since the ground height of the lowest step is lowered, the step boarding / leaving property of the mobile body, for example, the cabin boarding / leaving property can be improved.

  When the bottom step receives an external force (damage) when running on a rough road, it becomes possible to cause the bottom step to freely rotate and apply the external force (damage).

  Embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 shows an example in which the movable step device 1 for a vehicle according to the first embodiment of the present invention is applied to a large truck 3.

  In the present embodiment, the second step 10 which is a step for getting on and off is fixed to the vehicle side frame (or cabin side lower structure) 4 as shown in FIGS. The second step 10 is a saw-like step in which a counterbore process 12 is applied to the stepping surface 13 side of the through hole (hole portion) 11 so as to make point contact or surface contact with the spherical part 48 of the rod-shaped member 40. The through-hole (hole portion) 11 has a smaller diameter than the movable washer 46 that is loosely fitted to the rod-like member 40 so that the rod-like member 40 can be loosely fitted to the front and rear, left and right of the vehicle side frame (or cabin side lower structure) 4. The diameter is set larger than that of the shaft portion 43 of the member 40. For example, as disclosed in Japanese Patent Application Laid-Open No. 2005-231385, the second step 10 includes a substantially trapezoidal frame body in plan view, and a lattice-shaped slat part integrally formed in the frame body. By providing the portions in a lattice shape and opening a plurality of gaps, it is possible to prevent water from accumulating and mud from accumulating in the snowboard portion.

  As shown in FIGS. 2 and 3, the first step 20 constituting the lowest step for getting on and off is the first step 20 below the second step 10 in the front-rear direction of the vehicle-side frame (or cabin-side lower structure) 4. A flexible support member 30 and a vehicle-side frame (or cabin-side lower structure) positioned on the front side of the vehicle-side frame (or cabin-side lower structure) 4 so as to be parallel to the one step 20. 4 is hung from the second step 10 while being separated from the rod-like member 40 located on the rear side.

  The first step 20 includes a frame having a substantially trapezoidal shape in plan view and a frame in the frame so as to be able to reliably receive the weight of the passenger, for example, as disclosed in JP-A-2005-231385. It is composed of a lattice-shaped slat part formed integrally, and the slat part is provided in a lattice form to open a plurality of gaps, thereby preventing water from accumulating and depositing mud in the slat part. Further, the front end lower side 21 has a rounded shape so that an external force can be transmitted to the rod-shaped member 40 more effectively.

  In the first step 20, the tread surface 22 includes a coupling portion 23 that is pin-coupled to the eye joint 42 of the rod-shaped component 40.

  The flexible support member 30 is composed of a metal chain 31 having a cylindrical rubber 32 assembled on the outer periphery, and both ends are attached to the tread surface of the first step 20 and the bottom surface 14 of the second step 10. Has been.

  The rod-shaped member 40 includes a rod 41, an eye joint 42 provided on the first step 20 side of the rod 41, and a washer step 43 on the second step 10 side of the rod 41 and a step 43 A shaft portion 44 having the same diameter as the step portion 43 from the second step 10 side toward the tip, a washer 45 disposed on the step portion 43, and a coil spring 46 disposed on the shaft portion 44 on the washer 45. And a movable washer 47 loosely fitted on the shaft 44 on the coil spring 46 and a spherical component 48 screwed on the shaft 44.

  The rod-shaped member 40 is movable through the coil spring 46 by inserting the spherical part 48 into the shaft portion 44 from the tread surface 13 side of the second step 10 through the through hole 11 of the second step 10. The washer 47 is attached with the rear side of the second step 10 in between. The first step 20 side has a degree of freedom of rotation in one direction via the eye joint 42, and has an appropriate length for holding the first step 20 horizontally.

  The rod-shaped member 40 includes a washer 45 provided on the rod-shaped member 40, a movable washer 47 movably disposed on the rod-shaped member 40, and a coil spring 46 disposed between the washer 45 and the movable washer 47. A displacement absorber 50 is provided. The displacement absorbing portion 50 deflects the coil spring 45 when an external force is applied to the first step 20 to displace the rod-shaped member 40 in the axial direction, or displace the rod-shaped member 40 in the vehicle side frame (or cabin side lower structure). For example, the first step 20 can be freely rotated about the eye joint 42 as a fulcrum.

  Next, the operation of this embodiment will be described.

  FIG. 5 shows the movement of the first step 20, the flexible support member 30 and the rod-shaped member 40 when the obstacle hits the front of the first step 20.

  When the front part of the first step 20 hits an obstacle, the first step 20 is free to rotate upward using the pin connection part with the rod-like member 40 as a fulcrum because the front part is connected to the chain by the support member 30 having flexibility. It becomes a movement and prevents destruction of the first step 20 and the second step 10.

  FIG. 6 shows the movement of the first step 20, the flexible support member 30 and the rod-shaped member 40 when the obstacle hits the front of the first step 20.

  When an obstacle hits the front end of the first step 20 in the traveling direction, the lower end of the rod-like member 40 is pushed backward via the first step 10, and the rod-like member 40 is a spherical surface of the upper ball field body component 48. Pendulum movement with the center as a fulcrum. At this time, the relative angle between the rod-shaped member 40 and the first step 10 becomes an acute angle rather than a right angle, which leads to the above-mentioned free rotational movement of the first step 10.

  FIG. 7 shows the movement of the first step 20, the flexible support member 30, and the rod-shaped member 40 when the obstacle hits the rear part of the first step 20 from below in the vertical direction.

  When an obstacle hits the rear part of the first step 10 from below in the vertical direction, the rod-shaped member 40 moves upward by the amount of contraction of the coil spring 46 of the displacement absorbing part 50, and the destruction of the first step 10 and the second step 20 occurs. prevent. By making the length of the coil spring 46 arbitrary, it is possible to set an optimal contraction amount in accordance with the operation region and the use situation.

  As described above, according to the present embodiment, during normal operation, for example, as shown in FIGS. 1 and 2, the first step 20 is arranged below and parallel to the lower side than the second step 10. It can function as the lowest step when boarding a cabin, and can improve cabin entry / exit.

  Further, when traveling on a rough road, the input from the obstacle applied to the first step 20 is a displacement caused by the flexible support member 30 located on the front side of the large truck 3 and the rod-like member 40 located on the rear side. It is possible to prevent the movable step device 1 from being broken by rotating motion or pendulum motion.

  In the above embodiment, the case where the spherical component 48 is attached to the upper portion of the rod-shaped member 40 has been described. However, the present invention is not limited to this, and for example, as shown in FIG. good.

  Moreover, although the said embodiment demonstrated the case where the movable step apparatus 1 was attached to the vehicle side frame (or cabin side lower structure) 4, this invention is not restricted to this, For example, you may attach to a loading platform.

  Moreover, although the said embodiment demonstrated the case where the metal coil spring 46 was used for the displacement absorption part 50, this invention is not restricted to this, For example, you may use a rubber coil spring.

  Moreover, although the said embodiment demonstrated the case where the displacement absorption part 50 was provided in the rod-shaped member 40, this invention is not restricted to this, The 1st step 20 does not provide the displacement absorption part 50, but it is up-down and left-right. It may be possible to move.

  Moreover, although the said embodiment demonstrated the case where the eye joint 42 provided in the rod-shaped member 40 was pin-coupled with the connection part 23 provided in the tread surface 22 of the 1st step 20, this invention is not restricted to this, For example, When the rod-shaped member 40 is directly attached to the first step 20 and an external force is applied, the rotational movement between the rod-shaped member 40 and the second step 10 and the shaft portion 44 side of the rod-shaped member 40 are You may make it escape by making it protrude from the through-hole 11 upwards.

  Moreover, although the said embodiment demonstrated the case where the supporting member 30 which has flexibility was comprised with the metal chain | strands 31 which assembled | attached the cylindrical rubber | gum 32 on the outer periphery, this invention is not limited to this, For example, Alternatively, a piano wire, a metal wire, or a coil spring in which a cylindrical rubber 32 is assembled on the outer periphery may be used.

  Moreover, in the said embodiment, the 2nd step 10 and the 1st step 20 which comprise the lowest step for boarding / alighting are spaced apart in the front-back direction of the vehicle side frame (or cabin side lower structure) 4, and one by one. Although the case where it provided is demonstrated, this invention is not limited to this, For example, as shown in FIG.

  FIG. 9A shows a structure in which the rod-shaped part 40 is provided in two places, the rigidity is further improved, and the backlash of the first step 20 is also reduced. FIG. 9B shows a structure in which the rod-like component 40 and the flexible support member 30 are provided in two places to improve the rigidity or reduce the size of the connecting member (self-weight reduction). FIG. 9C shows a structure in which the bar-shaped part 40 is provided at one location and the flexible support member 30 is provided at two locations as an intermediate specification of the above two combinations.

  Moreover, although the said embodiment demonstrated using the large sized truck, this invention is not limited to this, It is applicable also to another mobile body, for example, a construction machine etc.

It is a fragmentary perspective view which shows the example which applied the movable step apparatus 1 of the vehicle which concerns on 1st embodiment of this invention to the heavy-duty truck. It is a schematic diagram which shows the movable step apparatus 1 of the vehicle in FIG. It is sectional drawing which shows the mounting part of the rod-shaped member 40 and the 2nd step 10 of the movable step apparatus 1 of the vehicle in FIG. It is the top view which notched a part which shows the 1st step 20, the rod-shaped component 40, and the flexible support member 30 of the movable step apparatus 1 of the vehicle in FIG. It is a schematic diagram explaining the effect | action when an obstruction hits the front part of the 1st step 20 of the movable step apparatus 1 of the vehicle in FIG. It is a schematic diagram explaining an effect | action when the obstruction hits the front-end part of the 1st step 20 of the movable step apparatus 1 of the vehicle in FIG. It is a schematic diagram explaining an effect | action when an obstruction hits the rear part of the 1st step 20 of the movable step apparatus 1 of the vehicle in FIG. It is sectional drawing which shows another example of the mounting part of the rod-shaped member 40 and the 2nd step 10 of the movable step apparatus 1 of the vehicle in FIG. (A) shows the structure which made the rod-shaped component 40 two places, further improved rigidity, and also reduced the backlash of the 1st step 20, (B) shows the support member 30 which has the rod-shaped component 40 and flexibility. Shows a structure in which the rigidity is improved or the size of the connecting member is reduced (self-weight reduction), and (C) shows a flexible structure with one bar-shaped part 40 as an intermediate specification of the above two combinations. The structure which has the support member 30 which has property in two places is shown.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Vehicle movable step apparatus 3 Large truck 4 Vehicle side frame (or cabin side lower structure)
10 Second step 11 Through hole (hole)
12 counterbore processing 13, 22 tread surface 14 bottom surface 40 rod-shaped member 46 movable washer 43 shaft portion 20 first step 30 flexible support member 21 front end lower side 42 eye joint 23 coupling portion 32 cylindrical rubber 31 made of metal Chain 41 Rod 43 Step 44 Shaft 45 Washer 46 Coil spring 47 Movable washer 48 Spherical part 49 Wheel nut shaped part 50 Displacement absorbing part

Claims (9)

A second step fixed to the moving body;
A first step located below the second step in the front-rear direction of the movable body;
A support member mounted between the second step and the first step so as to be separated in the front-rear direction of the movable body,
The second step comprises a step of providing a hole that penetrates and supports the support member,
The support member on the front side of the moving body is composed of a flexible member,
The support member on the rear side of the movable body is composed of a rod-shaped member,
The flexible member is bent when the first step hits an obstacle when traveling on a rough road, causing the first step to rotate freely,
The rod-shaped member passes through one end of the hole of the second step, and the one end is supported on the tread surface side of the second step. A second step fixed to the vehicle body or cabin;
A first step located below the second step in the longitudinal direction of the vehicle body or cabin;
A support member mounted between the second step and the first step so as to be separated in the front-rear direction of the vehicle body or the cabin;
The second step includes a step of providing a hole that penetrates and supports the support member,
The support member on the front side of the vehicle body or the cabin is composed of a flexible member,
The support member on the rear side of the vehicle body or the cabin is composed of a rod-shaped member,
The flexible member is bent when the first step hits an obstacle when traveling on a rough road, causing the first step to rotate freely,
The rod-shaped member passes through one end portion of the hole portion of the second step, and the one end portion is supported on the tread surface side of the second step. In the movable step apparatus of the vehicle according to claim 1 or 2,
The movable member of the vehicle is characterized in that the flexible member is composed of at least one of a chain covered with a cylindrical rubber, a metal wire, a piano wire, and a metal coil spring. apparatus. In the movable step apparatus of the vehicle according to any one of claims 1 to 3,
One end of the rod-shaped member penetrates the hole of the second step and is rotatably supported, and the other end is supported by the first step. In the movable step apparatus of the vehicle according to any one of claims 1 to 3,
One end portion of the rod-shaped member is supported through the hole of the second step, and the other end portion is supported by the first step via a hinge. In the movable step apparatus of the vehicle according to any one of claims 1 to 3,
The rod-shaped member has one end passing through the hole of the second step and is rotatably supported, and the other end is supported by the first step via a hinge. Movable step device. In the movable step apparatus of the vehicle in any one of Claims 1 thru | or 6,
A movable step device for a vehicle, comprising a displacement absorbing portion between the rod-shaped member and the second step. In the movable step apparatus of the vehicle according to claim 4 or 6,
The pivotable support between the rod-shaped member and the second step is constituted by a spherical part mounted between the rod-shaped member and the second step on one end of the rod-shaped member. A vehicle movable step device. In the movable step apparatus of the vehicle according to claim 7,
The displacement absorbing portion includes a washer provided on the rod-shaped member, a movable washer that is movably disposed on the rod-shaped member, and a coil spring that is disposed between the washer and the movable washer. A movable step device for a vehicle.