JPH0576884U - Steps for getting on and off a cab-over vehicle - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a boarding / alighting step that protects the components constituting the boarding / alighting step and the vehicle even in the event of a collision with a ground obstacle. [Structure] A fixed pipe member 30 fixed to a frame 1 and a movable pipe member 20 having an auxiliary step 21
Fastening and fixing with a shear bolt 40 so that 46 is located at the connecting portion between the pipe members 20 and 30.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a step for getting on and off a cab-over type vehicle.

[0002]

[Prior Art]

 For vehicles with a high cab floor, such as large trucks, it is common to provide a step for getting on and off in consideration of getting on and off. However, in a cab-over type vehicle that tilts the cab, if the boarding / alighting step is provided on the cab side, there is a risk that the boarding / alighting step will interfere with the tires during tilting, and the mounting position etc. will be restricted. ..

Therefore, the applicant of the present application first applied for a frame in which a step is attached to a frame under a door of a cab via a pipe to form an auxiliary step for getting on and off (see Japanese Utility Model Laid-Open No. 2-120264). ..

[0004]

[Problems to be solved by the device]

 By the way, in the conventional boarding / alighting step in which a step is mounted on the frame through a pipe to form a boarding / alighting auxiliary step, it is necessary to consider interference with the tire when tilting the cab. Absent. Therefore, in order to ensure good boarding / alighting property, the boarding / alighting step should be provided at the lowest possible position.

For this reason, there is a possibility that the auxiliary step may collide with a ground obstacle such as a curb during traveling, resulting in damage to the parts constituting the auxiliary step. In addition, since the auxiliary step is attached to the frame via a pipe, the impact at the time of collision is transmitted to the frame, which may damage the frame. The present invention has been made in view of the above-mentioned conventional problems, and when an impact is applied, the impact is concentrated and acts, and by interposing a portion that absorbs the impact, a ground obstacle is formed. It is an object of the present invention to provide a step for getting on and off a cab-over type vehicle, which protects the components and the vehicle that constitute the step for getting on and off even in the event of a collision.

[0006]

[Means for Solving the Problems]

 Therefore, the present invention is a cab-over type vehicle in which an auxiliary step for getting on and off is formed by attaching the step to the frame under the door of the cab via a pipe, and the auxiliary step has one end fixed to the frame. A fixed pipe having a flange for joining at the end, and a movable pipe having an auxiliary step at one end and a flange for joining at the other end are provided, and the flange for joining the fixed pipe and the joint for joining the movable pipe. It is configured to be joined to the flange via a shear pin.

[0007]

[Action]

 According to this structure, when the auxiliary step collides with a ground obstacle such as a curb and an impact is applied to the auxiliary step, the auxiliary pipe is interposed at the joint between the fixed pipe fixed to the frame and the movable pipe to which the auxiliary step is connected. The impact acts on the shear pin that has been subjected. Then, the shear pin is sheared by the impact, and the impact is absorbed by the shear of the shear pin. Therefore, it is possible to prevent the impact due to the collision with the ground obstacle from acting on the fixed pipe fixed to the frame, the movable pipe connected to the auxiliary step, or the frame of the vehicle. Alternatively, it becomes possible to protect the frame of the vehicle.

[0008]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. 1 to 5 showing an embodiment of the present invention, a boarding step 10 including a movable pipe member 20 and a fixed pipe member 30 is attached to a frame 1 below a door of a cab (not shown).

In the movable pipe member 20, a flat plate-shaped auxiliary step 21 is coupled to a lower end portion thereof, and a mounting flange 22 is provided upright at an upper end portion thereof. A bolt hole 23 is provided in the mounting flange 22. Further, the fixed pipe member 30 is provided with a fixing flange 31 having a fastening hole 32 for fastening and fixing the boarding step 10 on the frame 1 at one end portion facing the frame 1, and at the other end portion. A mounting flange 33 provided with a bolt hole 34 is erected. As shown in FIG. 2, the inner diameter φd ₃₀ of the fixed pipe member 30 is formed to be slightly larger than the outer diameter φD ₂₀ of the movable pipe member 20, and the fixed pipe member 30 is fitted with the movable pipe member 20. Has become.

Then, when the movable pipe member 20 is fitted into the fixed pipe member 30 and the mounting flange 33 and the mounting flange 22 face each other, a sheer bolt 40, which will be described later, is passed through the bolt holes 34 and 23, and the mounting flange 33 and The mounting flange 22 is fastened and fixed by a nut 43 via a washer 42. Here, as shown in FIG. 3, the bolt portion 44 of the shear bolt 40 has an outer diameter that fits loosely into the bolt holes 34 and 23, and the head portion 45 is loose so as to come into contact with the mounting flange 33. In the fitted state, the shearing portion 46 having a small outer diameter is located between the mounting flange 33 and the mounting flange 22 (see FIG. 2).

According to such a configuration, as shown in FIG. 4, when the auxiliary step 21 of the step 10 for getting on and off collides with a ground obstacle such as the curbstone 51 and a shock is applied to the auxiliary step 21, the impact is given. The auxiliary step 21 is transmitted through the movable pipe member 20 to be joined and acts on the shear bolt 40 joining the mounting flange 33 and the mounting flange 22. Since the shear bolt 40 is fastened so that the shearing portion 46 is located between the mounting flange 33 and the mounting flange 22, the shearing portion 46 of the shear bolt 40 is sheared by the impact, and the impact is It is absorbed by the shearing of the shearing portion 46 of the shear bolt 40 (see FIG. 5).

Therefore, it is possible to prevent the impact caused by the collision with the curbstone 51 or the like from bending the fixed pipe member 30 fixed to the frame 1 or the movable pipe member 20 to which the auxiliary step 21 is coupled, or It is possible to prevent the action on the frame 1 of the vehicle, and it is possible to protect the fixed pipe member 30, the movable pipe member 20, or the frame 1 of the vehicle.

Further, even when the shear bolt 46 collides with the curbstone 51 or the like, the shearing portion 46 of the shear bolt 40 is only sheared, so that the mounting flange 33 and the mounting flange 22 should be fastened and fixed by the shear bolt 40 again. As a result, it is possible to restore step 10 for boarding / alighting, which leads to a reduction in maintenance costs.

[0014]

[Effect of the device]

 As described above, according to the step for getting on and off the cab-over type vehicle according to the present invention, the fixed pipe having one end fixed to the frame and the movable pipe having the auxiliary step connected to the one end are joined via the shear pin. By providing the auxiliary step of the structure, even if the auxiliary step collides with a ground obstacle such as a curb, it is possible to prevent the impact of the collision from acting on the fixed pipe, the movable pipe, or the vehicle frame. Further, it is possible to protect the fixed pipe, the movable pipe, the frame of the vehicle, and the like, and it is possible to reduce the maintenance cost when the step for getting on and off is restored.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of the present invention.

FIG. 2 is a partial sectional view according to the above embodiment.

FIG. 3 is a side view of the shear bolt according to the above embodiment.

FIG. 4 is a side view illustrating the operation according to the above embodiment.

FIG. 5 is a side view illustrating the operation according to the above embodiment.

[Explanation of symbols]

 1 Frame 10 Step for getting on and off 20 Movable pipe member 21 Auxiliary step 22 Mounting flange 30 Fixed pipe member 33 Mounting flange 40 Shear bolt 46 Shear part

Claims (1)

[Scope of utility model registration request] 1. A cab-over type vehicle in which an auxiliary step for getting on and off is formed by attaching a step to a frame below a door of a cab via a pipe, wherein the auxiliary step has one end fixed to a frame and the other end joined together. And a movable pipe having an auxiliary step at one end and a flange for joining at the other end, and the joining flange of the fixed pipe and the joining flange of the movable pipe. A step for getting on and off a cab-over type vehicle, which is characterized by being joined via a shear pin.