Vehicle forced stopping device

Abstract

To provide a vehicle stopping device with high braking effectiveness that stops the vehicle's progress even when the vehicle crashes with the vehicle offset against the vehicle stopping device.SOLUTION: A vehicular forced stopping device 1 is provided with a base frame 2 having Longitudinal frame elements 4a, 4b, 4c, and 4d arranged in parallel across the front and rear, and transverse frame elements 5a, 5b coupled to the front and rear of the longitudinal frame elements, two arm-shaped actuating parts 11 arranged in a state of having an elevation angle and pivotally supported by rear parts on both sides of the base frame 2, a vertical bar 13 raised above the tip of both actuating arms, and a stop bar 3 having a horizontal bar 14 connecting the upper ends of both vertical bars 13. Elastic means 20 deformed with the lowering of the actuating parts 11 and generating elastic resistance is journaled to the rear part of the base frame 2, and the load by the car is transmitted to the base frame 2 by the elastic means 20.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a vehicle forced stop device.

Background Art

[0002] When a vehicle accidentally enters a work site for road construction or the like, an accident may occur in which a worker is involved. To prevent the occurrence of such an accident, there is an entering vehicle stop device described in the URL shown as Non-Patent Document 1. When the front part of the vehicle comes into contact, the vehicle rides up on an arm that has entered under the vehicle, and the vehicle is stopped by the frictional resistance at the contact part between the device itself and the road surface.

[0003] Also, this vehicle stop device has two to four strong arms that enter under the vehicle to lift the vehicle, but it mainly assumes a situation where the vehicle collides with the center of the vehicle stop device.

Prior Art Documents

Non-Patent Documents

[0004]

Non-Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] An object is to provide a vehicle stop device that can prevent the vehicle stop device from lifting up due to a vehicle collision, maintain road surface resistance to minimize movement relative to the road surface, and thereby exhibit a high vehicle stop effect. Another object is to provide a vehicle stop device with a high braking effect that can stop the vehicle even when the vehicle collides in a state offset from the center of the vehicle stop device.

Means for Solving the Problems

[0006] To solve the above problems, the present invention has the following configuration. That is, a vehicle forced stopping device, A vehicle stopping device that reduces the speed of a vehicle to bring it to a stop, It has a base frame and a stop bar, The base frame comprises vertical frame elements arranged on both sides in the front-to-back direction, It has transverse frame elements suspended so as to connect the longitudinal frame elements at the front and rear sections, respectively. The stop bar comprises two arm-shaped operating parts that are pivotally supported at the rear of both sides of the base frame and positioned at an elevation angle toward the front, The operation of both Department A vertical bar that is bent and raised upward from the tip, It has a horizontal bar connecting the two aforementioned vertical bars at their upper ends, A vehicle forced-stop device characterized in that an elastic means is pivotally supported at the rear of the base frame, which deforms as the operating part descends and generates an elastic resistance force.

[0007] Furthermore, the above-mentioned vehicle forced stopping device, The elastic means is a leaf spring having a curved portion that protrudes downward, The tip of the leaf spring is pivotally supported in front of the operating part, and the portion that protrudes downward is brought into contact with the base frame or a bottom plate provided on the bottom surface of the base frame, thereby supporting the operating part with elastic force.

[0008] Furthermore, the above-mentioned vehicle forced stopping device, The base frame is characterized by having a curved portion at its tip that extends upward from the bottom surface. [Effects of the Invention]

[0009] The vehicle stopping device according to the present invention prevents a moving vehicle from moving by having it collide with a stop bar. To achieve this objective, the present invention has an operating part that utilizes the force received from the moving vehicle upon contact to increase the frictional resistance between the vehicle stopping device and the road surface. This enhances the braking effect that stops the moving vehicle. Furthermore, the cross-sectional shape of the operating part is circular or semi-circular. This reduces the frictional load generated between the vehicle and the operating part, and also has the effect of efficiently generating a force toward the road surface in the operating part. In addition, an elastic means such as a leaf spring is provided so that when a load is generated on the operating part, the elastic means generates a downward pressing force on the vehicle stopping device itself. This suppresses the lifting of the vehicle stopping device itself when it collides with the stop bar as the vehicle moves, thereby increasing the braking force. [Brief explanation of the drawing]

[0010] [Figure 1] This is a perspective view of the vehicle stopping device, seen from a diagonal front angle. [Figure 2] This is a perspective view of the vehicle stopping device, seen from a diagonal rearward angle. [Figure 3] This is an explanatory diagram illustrating the operation of a vehicle stopping device. [Figure 4] This is an explanatory diagram showing the initial state of the vehicle stopping device. [Figure 5] This is an explanatory diagram illustrating the contact between the vehicle and the operating part. [Figure 6] This is a perspective view of another type of vehicle stopping device, seen from a diagonal front angle. [Figure 7] This is a perspective view of another type of vehicle stopping device, seen from a diagonal rearward angle. [Modes for carrying out the invention]

[0011] Hereinafter, embodiments for implementing the present invention will be described with reference to the drawings. Since there are several forms of the vehicle stop device according to this embodiment that differ in structure in detail, representative ones will be described. [First Embodiment] FIG. 1 and FIG. 2 show external perspective views of the vehicle stop device 1 according to this embodiment as seen from different directions. The vehicle stop device 1 mainly includes a base frame 2 that forms a bottom in contact with the road surface and a stop bar 3 that is swingably attached to the base frame 2.

[0012] The base frame 2 is composed of frame elements combined and joined in a rectangular frame shape. The frame elements are composed of vertical frame elements 4 (4a, 4b) arranged on both sides in the front-rear direction and horizontal frame elements 5 (5a, 5b) suspended between the two vertical frame elements 4 (4a, 4b) at the front and rear portions.

[0013] Inside the left and right vertical frame elements 4a and 4b provided on the base frame 2, vertical frame elements 4c and 4d are provided in parallel with the vertical frame elements 4a and 4b with a gap having approximately the same width as the vertical frame elements opened. Each of these frame elements is formed of a strong aluminum alloy or other steel material and is firmly joined to each other by fastening means such as welding or bolts and nuts. Both the vertical frame elements 4 and the horizontal frame elements 5 constituting the base frame 2 are formed of steel pipes having a tubular cross-section. In this embodiment, square steel pipes are adopted, but round steel pipes, steel materials having cross-sectional shapes such as C-shaped or L-shaped, etc. may be used as long as the object and action of the present invention are not deviated, and various steel materials including square steel pipes may be combined.

[0014] In addition, in the vehicle stop device 1 of this embodiment, at the tip portions of the outer vertical frame elements 4a and 4b that constitute the outer shape of the base frame 2, there are provided warped portions 6 having a curved surface that rises upward from the bottom surface like the tip of a bellows. At the tip portions of the vertical frame elements 4a and 4b that constitute the tip portion of the warped portion 6, a horizontal frame element 5c formed of a square steel pipe is suspended and connected.

[0015] On the bottom surface of the base frame 2 formed in this way, a bottom plate 7 made of a steel plate formed of an aluminum alloy or other steel material including the portion where the warped portion 6 is provided is attached. The bottom plate 7 enhances the rigidity of the entire base frame 2 and exhibits the effect of preventing the vehicle wheels from contacting the road surface when the wheels of the vehicle enter the base frame 2. An elastic member (not shown) such as a rubber plate having the effect of increasing the contact (friction) resistance with the road surface may be appropriately attached to the back surface of the bottom plate 7.

[0016] The stop bar 3 is formed by bending a single steel pipe or a solid round bar made of an aluminum alloy or other steel material. Both ends of the stop bar 3 are pivotally supported so as to be swingable with the support shafts 10 provided on the left and right of the rear portion of the base frame 2 as fulcrums. The support shafts 10 are rod-like bodies supported by the vertical frame elements 4a, 4c and the vertical frame elements 4b, 4d, respectively, and are constituted by strong pins that can be inserted and removed from the side. The stop bar 3 has two left and right arm-shaped operating portions 11 (11a, 11b) arranged in a state of having an upward elevation angle with respect to the horizontal direction toward the front, and the ends are rotatably attached to the support shafts 10. Further, at the tip portions 12 of both the operating portions 11 (11a, 11b), vertical bars 13 (13a, 13b) that rise upward with bending are provided, and the upper ends of both the vertical bars 13 are connected by a horizontal bar 14. The operating portions 11, the vertical bars 13, and the horizontal bar 14 that constitute the stop bar 3 are formed by bending a single solid round bar or a hollow round tube. If a predetermined strength can be provided, the stop bar 3 may have a structure divided into an integral body by the connection of each element.

[0017] When a vehicle approaches by straddling the arm-shaped operating part 11, the stop bar 3 swings downward due to contact with the vehicle. As the vehicle approaches, the bottom of the vehicle comes into contact with the operating part 11, so a shape is adopted that takes into consideration the reduction of frictional resistance at the contact point with the vehicle. Specifically, the contact area with the vehicle is reduced by forming it from a steel pipe with a round cross-section or a solid rod-shaped material. In particular, for the operating part 11 that will come into contact with the bottom of the vehicle, it is preferable to have little contact resistance between it and the vehicle, so a cross-sectional shape is adopted that can reduce the contact area as much as possible without compromising strength.

[0018] Furthermore, a slope 15 is provided on the end face of the lateral frame element 5b that constitutes the rear end of the base frame 2. The slope 15 has the effect of making it easier for the vehicle's wheels to straddle the lateral frame element 5b.

[0019] The actuation unit 11 is pivotally supported on a support shaft 10 located at the rear of the base frame 2, so that the entire stop bar 3, including the vertical bars 13a, 13b and the horizontal bars 14, 14b, can rotate. The actuation unit 11 is also biased upward by a leaf spring 20 whose end is supported at the rear of the base frame 3. The leaf spring 20 is formed as a plate-like body that curves downward, and an elastic force is generated when the curved protrusion contacts the upper surfaces of the vertical frame elements 4a and 4b. The tip of the leaf spring 20 is attached to a shaft portion 16 located below the tip portion 12, and supports the operating portion 11 with elastic force against the force pushing down on the operating portion 11.

[0020] Specifically, when the stop bar 3 is pushed down by the vehicle, the leaf spring 20 pushes the base frame 2 downward. When the leaf spring 20 is pushed down, the contact point between the curved protrusion and the base frame 2 moves forward, starting from a position close to the support shaft 10. However, this contact point is thickened so that it is limited to a range slightly rearward from the center, thereby preventing the end from lifting up. Furthermore, as an elastic means that presses the vertical frame elements 4a and 4b downward in conjunction with the tilting of the operating part, a torsion spring or the like may be used instead of a leaf spring, although this is not shown in the illustration. In this case, by limiting the contact position between the base frame 2 and the elastic means to a range slightly rearward from the center, it becomes possible to prevent the end part from lifting up.

[0021] As an example, the operating part 11 (11a, 11b) of the stop bar 3 is provided with a plate-shaped blade 22 (22a, 22b) that protrudes downward. The blade 22 descends as the operating part 11 rotates downward and protrudes downward through a slit 23 formed in the steel base plate 7. The lower end of the blade 22 has a saw-tooth shape and protrudes from the back surface of the base plate 7, contacting the road surface such as asphalt to generate braking force.

[0022] The blade 22 enhances the vehicle's stopping effect by suppressing the movement of the vehicle stopping device 1 on the road surface. Furthermore, it has the excellent feature of not damaging the road surface because it does not protrude towards the road when the vehicle is not in contact with it. In addition, an elastic material such as rubber with high frictional resistance may be attached to the bottom surface, and these can be selectively combined as appropriate. The blade 22 is formed as a plate-like body that protrudes downward from the operating part 11. In this embodiment, however, a narrow plate-like body 17 (17a, 17b) is provided continuously from the blade 22, extending from the tip 12 of the operating part 11 to the vertical bar 13 that rises upward. This plate-like body 17 has the effect of increasing the overall strength of the stop bar 3 and also serves as the part where the shaft portion 16 that supports the leaf spring 20 is provided. Furthermore, a reinforcing bar 18 is provided coaxially with the shaft portion 16 between the plate-like bodies 17a and 17b, further increasing the overall strength of the stop bar 3.

[0023] Figure 3 is an explanatory diagram illustrating the state when a vehicle S collides with the vehicle stop device 1. The width of the vehicle stop device 1 is roughly such that it can be straddled by the left and right front wheels of a typical passenger car. When the width is formed to this size, if a vehicle S enters the center of the vehicle stop device 1, the base frame 2 and the operating parts 11 of the stop bar 3 will be submerged under the vehicle S. Figure 4 is an explanatory diagram showing a state in which a vehicle S has not collided with the vehicle stopping device 1. In this state, the blade 22 is raised on the bottom plate 7. When a vehicle S enters the vehicle stopping device 1 in the state shown in Figure 4, the operating part 11 of the vehicle stopping device 1 comes into contact with the chassis or the like at the bottom of the vehicle and is pressed downward, causing the stop bar 3 to rotate downward. At this time, the bottom surface of the vehicle S moves while rubbing against the operating part 11, simultaneously pushing down the operating part 11. At this time, the leaf spring 20, whose tip is attached to the front of the operating part 11, is lowered, and the load acting on the operating part 11 is transmitted to the base frame 2.

[0024] On the other hand, when the front of the vehicle S presses against the vertical bar 13 or horizontal bar 14 of the stop bar 3, a moment is generated that causes the rear of the base frame 2 to lift up, with the front of the base frame 2 acting as a pivot point. If the rear of the base frame lifts up due to this moment, the braking force will decrease, and it may become impossible to maintain the vehicle stopping device 1 in an appropriate state relative to the vehicle S. For this reason, a load is applied to the base frame 2 via the leaf spring 20 in a direction that counteracts the aforementioned moment. Therefore, it is preferable that the contact point of the leaf spring 20 be as far as possible on the rear side (vehicle side) of the base frame 2, and the shape and structure of each part are designed to produce this action and effect.

[0025] Figure 5 is a simplified explanatory diagram showing the contact between the vehicle S and the operating part 11 when the vehicle S enters the vehicle stopping device 1. As mentioned above, the cross-sectional shape of the operating part 11 is made circular in order to minimize contact resistance with the vehicle. If the vehicle S does not slide smoothly against the operating part 11 and the vehicle stopping device 1 does not enter the vehicle to the appropriate position, the load pressing down on the base frame 2 may become insufficient, and sufficient braking force may not be exerted. Furthermore, if the vehicle S does not slide smoothly against the operating part 11, the vehicle S may detach from the vehicle stopping device 1 as if being thrown off it, potentially rendering the device ineffective as a stopping device. In this embodiment, the cross-sectional shape of the operating part 11 of the vehicle stopping device 1 is circular so that it can smoothly enter the vehicle S to the appropriate position.

[0026] Furthermore, if the operating part 11 is formed from a material with a large contact area, such as a square pipe, there is a possibility that the wheels will continue moving while stuck on it. However, if it is formed from a round pipe with a circular cross-section, it has the effect of making it easier for the front wheels to slide off to the left or right even if they get stuck on it. Furthermore, the cross-sectional shape of the operating part 11 is not limited to a circular shape; other shapes such as a semi-circular shape are acceptable, as long as they minimize frictional resistance with the vehicle S and provide sufficient strength. Mechanisms to further reduce frictional resistance may also be incorporated.

[0027] Furthermore, a vehicle may enter the vehicle stopping device 1 not in the center, but offset, straddling only the left or right operating part 11. In this case, only the right or left front wheel enters the vehicle stopping device 1. In the initial stages of this case, the wheel steps on the end of the base frame 2 (lateral frame element 5b), and in vehicles with short noses, it progresses to the point where it crosses over the lateral frame element 5b and steps on the bottom plate 7. At this point, only one of the two operating parts 11a and 11b comes into contact with the bottom of the vehicle S. When only one of the operating parts 11 is engaged with the bottom of the vehicle S, braking is applied to only one side of the vehicle, making the vehicle S unstable. In this state, the wheels themselves press against the bottom plate 7 or the lateral frame element 5b, and are sandwiched on both sides by the two operating parts 11a and 11b, making it difficult for them to detach from the vehicle stopping device 1. In this way, braking force is applied to the vehicle S, thereby stopping its movement.

[0028] [Second Example] Figure 6 is an external perspective view of another form of the vehicle stopping device 100, viewed from the front at an oblique angle, and Figure 7 is an external perspective view of the vehicle stopping device 100, viewed from the rear at an oblique angle. Except for the shape of the base frame 101, the vehicle stopping device 100 is the same as the vehicle stopping device 1 described above in terms of its main structure and function of stopping the vehicle S. Therefore, identical structural components will be denoted by the same reference numerals and their descriptions will be omitted below, and the differences from the vehicle stopping device 1 will be explained in detail.

[0029] The base frame 101 is a rectangular frame comprising four parallel-arranged vertical frame elements 102 (102a, 102b, 102c, 102d), which are rectangular tubular components, and horizontal frame elements 103 (103a, 103b) suspended between two of the vertical frame elements at the front and rear ends. A bottom plate 104, similar to the bottom plate 7, is attached to the bottom surface of the base frame 101. This diagram illustrates an example where the tip of the base frame 101 does not have the sled-like curved portion provided on the vehicle stopping device 1.

[0030] Although the vehicle stopping devices 1 and 100b described above are explained in terms of their use individually, they may also be configured to be connected to each other on the left and right sides. The method of connection is not particularly limited; they may be directly connected or connected by forming separate connecting fittings. Additionally, the front end of the base frame may be fitted with casters for transport, which will make contact with the ground and roll during transport.

[0031] The embodiments of the present invention have been described above, but these are merely examples and are not intended to limit the technical scope of the invention. Furthermore, each of the examples and technical elements described can be used in appropriate combinations, omissions, substitutions, modifications, and additions without departing from the scope of the claims, and these are also described herein and fall within the technical scope of the present invention. [Industrial applicability]

[0032] This invention can be used in a vehicle stopping device that stops a moving vehicle. [Explanation of symbols]

[0033] 1. Vehicle stopping device 2 Base Frame 3 Stop Bars 4 (4a, 4b, 4c, 4d) Vertical frame elements 5(5a, 5b) Horizontal frame element 6. Curved section 7 Bottom plate 10 spindle 11 (11a, 11b) Operating part 12 Tip 13 (13a, 13b) Vertical bar 14 horizontal bars 15 slopes 20 leaf springs 22 (22a, 22b) blade 23 slits 100 Vehicle stopping device 101 Base Frame 102 (102a, 102b, 102c, 102d) Vertical frame elements 103 (103a, 103b) Horizontal frame element 104 Bottom plate S Vehicle

Claims

1. A vehicle stopping device that reduces the speed of a vehicle to bring it to a stop, It has a base frame and a stop bar, The base frame comprises vertical frame elements arranged on both sides in the front-to-back direction, It has transverse frame elements suspended so as to connect the longitudinal frame elements at the front and rear sections, respectively. The stop bar comprises two arm-shaped operating parts that are pivotally supported at the rear of both sides of the base frame and positioned at an elevation angle toward the front, A vertical bar is bent and raised upward from the tip of the aforementioned operating part on both sides, It has a horizontal bar connecting the two aforementioned vertical bars at their upper ends, An elastic means that deforms as the operating part descends and generates an elastic resistance is pivotally supported at the rear of the base frame. The elastic means is a leaf spring having a curved portion that protrudes downward, A vehicle forced-stop device characterized in that the tip of the leaf spring is pivotally supported in front of the operating part, and the operating part is supported with elastic force by bringing the portion that protrudes downward into contact with the base frame or a bottom plate provided on the bottom surface of the base frame.

2. The vehicle forced stopping device according to claim 1, characterized in that a curved portion extending upward from the bottom surface is provided at the tip of the base frame.

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