JP4709805B2 - Free roller device for vehicles - Google Patents

Description

  The present invention relates to a vehicle free roller device that rotates a vehicle tire in a free state.

  When testing (inspecting) a vehicle, a speed test is mandatory especially in vehicle inspection. The speed test is usually carried out with a speed measuring device (for example, a brake / speedometer combined test is often used) embedded in the floor of the test site. In this speed measuring device, the vehicle tire on the driving side is placed between a pair of rotating rollers, the vehicle is driven, the speed by the speedometer on the vehicle side is compared with the speed by the measuring device (sensor) on the speed measuring device side, Pass / fail is determined by whether or not the difference is within a predetermined range.

  However, in the full-time 4WD model, both the front and rear wheels always rotate. Therefore, the vehicle tire on the main drive side (the vehicle tire on the larger side when the front and rear wheels have different distribution ratios, either vehicle with the same distribution ratio) Tire) is placed between a pair of rotating rollers, and the vehicle tire on the driven side is placed on a free roller device having a pair of free rollers and is idled.

As such a free roller device, various devices have been proposed, from a simple type having a simple structure to a relatively complicated structure (for example, cited document 1).
JP 2003-114171 A

  The speed test operation using the simple type free roller device is illustrated as shown in FIGS. First, as shown in FIG. 4, at the test site, two free roller devices 2 and 2 are prepared for the speed measuring device 1 having a pair of left and right rotating rollers 1a and 1a. Here, the vehicle C to be tested is a full-time 4WD vehicle in which the front wheel side is the main drive side.

  The following is a series of work. (1) As shown in FIG. 5, in the speed measuring device 1, the front wheel (vehicle tire) of the vehicle C is placed in a state where the lift portion 1b between the pair of rotating rollers 1a and 1a is raised. (2) Next, the lift part 1b is lowered and the front wheel is dropped between the pair of rotating rollers 1a and 1a. (3) Since the position of the rear wheel portion is determined in this state, the two free roller devices 2 and 2 are temporarily placed on the side of the rear wheel according to the center of the rear wheel.

  (4) Thereafter, the lift 1b is raised, the front wheel of the vehicle C is lifted, and as shown in FIG. 6, the vehicle C is temporarily retracted about 60 cm once. (5) Here, the two free roller devices 2, 2 temporarily placed on the side are pushed into the lower part of the vehicle so as to be directly under the rear wheel of the vehicle C. At this time, fine adjustment is performed so as not to cause positional deviation.

  (6) Re-enter the vehicle C, move the vehicle C forward, and place the front wheels on the lift portion 1b in the raised state between the pair of rotating rollers 1a, 1a, while the rear wheels have two units as shown in FIG. The free rollers 2 and 2 are placed between the free rollers 2a and 2a. (7) Thereafter, the lift 1b is lowered, and the front wheel is dropped between the pair of rotating rollers 1a and 1a. (8) As a precaution, it is confirmed whether or not the rear wheel is at a predetermined normal position of the two free roller devices 2 and 2.

  (9) When the above conditions are satisfied, a predetermined speed test is performed. (10) When the test is completed, the lift part 1b of the speed measuring device 1 is raised. (11) After that, the vehicle C is moved back straight by about 60 cm, and is stopped when the rear wheels are separated from the two free roller devices 2 and 2. (12) Since the two free roller devices 2 and 2 become obstructive (route obstruction) as they are, they are pulled out to the side and removed. (13) The vehicle C is moved backward again and retracted from the test location.

  As is clear from the above description, when performing a speed test using two free roller devices 2 and 2 in a full-time 4WD vehicle, there are many conventional work man-hours, and when the vehicle moves forward and backward There was a problem that it was necessary to get into the vehicle each time, and the work efficiency was poor. In addition, the free roller device has a relatively simple structure even if it is a heavy object (approximately 15 kg even if it is a simple type, and more than that if it has a complicated structure). Therefore, taking in and out of the lower part of the vehicle, coupled with the lack of space, is a heavy labor. Basically, since it is a work that is slid by human power, a large amount of labor is required. In particular, when centering on the center of the rear wheel, there is a problem that it is heavy, and thus it is easily displaced and fine adjustment is difficult.

  The present invention has been made in view of the above-described conventional problems. Basically, since the structure is a carriage base, it does not require a large amount of labor in use, and the centering of the wheel is easy. Moreover, the present invention provides an excellent free roller device for a vehicle that can significantly reduce the number of conventional work steps.

  The present invention according to claim 1 is a vehicle free roller device that rotatably supports a vehicle tire with a pair of free rollers, wherein the short piece frame portion is extended in the same direction from both ends of the long piece frame portion. A substantially U-shaped bogie frame, a plurality of wheels provided on the bottom surface side of the bogie frame, a left screw portion and a right screw portion are connected at approximately the center, and in the vicinity of the long frame portion side of the bogie frame A screw shaft for expanding and contracting the roller interval that is axially attached to the shaft, a shaft rotation operation portion protruding from at least one free end side of the screw shaft, and one end portion of the left and right screw portions of the screw shaft. A pair of roller shafts rotatably mounted, a pair of free rollers rotatably mounted on the respective roller shafts, a shaft rotatably mounted on the free end side of the pair of roller shafts, and The height of the bottom of the car A rotating roller that is substantially the same as the height of the vehicle bottom of the wheel on the cart frame side, and the free roller is attached to the free roller side of both short frame portions of the cart frame, and the free roller is a short frame portion of the cart frame And a pair of slope members having an upward inclined surface on which the free roller surface rests when close to the side.

  According to a second aspect of the present invention, in the free roller device for a vehicle according to the first aspect, a stopper member for a free roller is provided in the vicinity of the upper surface side of the pair of slope members.

  According to a third aspect of the present invention, there is provided the vehicle free roller device according to the first or second aspect, wherein a stopper member for a vehicle tire is provided on the long frame portion side of the carriage frame.

  According to a fourth aspect of the present invention, an anti-slip member made of elastic rubber or the like is provided on the short frame portion side of the carriage frame and the outer surface of the rotating roller of the free roller. It is in the free roller apparatus for vehicles of description.

  According to the free roller device for a vehicle of the present invention, since the basic structure is a carriage base structure, the vehicle can be easily put in and out of the lower part of the vehicle. That is, it can be used without requiring a large amount of labor, and excellent usability can be obtained.

  In addition, the bogie frame that forms the base skeleton is substantially U-shaped, and one of the pair of free rollers that support the vehicle tire is open, so that the vehicle frame, for example, the rear wheel side, is directly drilled from the side. Can be included. As a result, there is no need to once reverse the vehicle as in the conventional apparatus.

  In addition, the distance between the pair of free rollers is determined by the rotation of the screw shaft for expanding and contracting the roller interval, which is formed by connecting the left and right threaded portions at approximately the center. Is called. In other words, as the distance between the pair of free rollers is reduced, the vehicle tire is in contact with the center and the centering is easily and quickly performed. As a result, the delicate position adjustment is not required as in the conventional apparatus.

  In addition, there is a pair of corresponding rotating rollers on the free end side of the pair of free rollers, and the structure is adapted to receive the load on the vehicle tire side together with the wheel (caster) on the cart frame side, so that the load is appropriately dispersed. Supported and stable testing (measurement) can be performed.

Further, when the pair of free rollers is provided with a pair of slope members having an inclined surface on which the free roller surface rises when the pair of free rollers moves to the vicinity of the short frame portion side of the carriage frame most, for example, At this time, the pair of free rollers are lifted, and each of the rotating rollers is in a state of being floated (separated) from the bottom surface position of the wheel on the cart frame side.
As a result, even if each rotary roller of the pair of free rollers has a structure having only one-way straightness, the cart frame can be freely moved by separating it from the ground contact surface. In other words, if it is moved in this state, it can be easily and quickly taken into and out of the lower part of the vehicle. Further, as a result, the rotating roller of the free roller is opened with respect to the short piece frame portion of the carriage frame, so that both can be stood and stored as legs when not in use.

  1 to 2 show an example of the entire vehicle free roller device according to the present invention. In the figure, 10 is a free roller device for the vehicle, 20 is a generally U-shaped bogie frame in which short frame portions 22, 22 are extended in the same direction from both ends of a long frame portion 21, from a metal aggregate or the like. Become. Reference numeral 30 denotes a plurality of wheels provided on the bottom surface side of the carriage frame 20. As the wheel 30, it is desirable to use a freely changing direction caster that can move in any direction. Although it is possible to attach directly to the cart frame 20 side, in this example, it is provided at substantially four corners of the cart frame 20 via mounting plates 31 attached to the cart frame 20 side.

  Reference numeral 40 denotes a roller shaft for expanding and contracting the roller interval, in which a left screw portion 41 and a right screw portion 42 are connected by a substantially central connecting portion 43. This is because, in the vicinity of the long frame portion 21 side of the carriage frame 20, a bearing 44 provided in the center portion of the long piece frame portion 21 and bearings 45, 45 provided on the base side of both short piece frame portions 22, 22, It is attached to the shaft. The screw shaft 40 may be manufactured from an integral rod-shaped shaft as a left screw portion 41, a shaft mounting portion corresponding to the central connecting portion 43, and a right screw portion 42.

  Reference numeral 50 denotes a shaft rotation operation unit that protrudes from both free end sides (only one of them) of the screw shaft 40 for expanding and contracting the roller interval. This portion is set as, for example, a square columnar portion, a hexagonal columnar portion, a square hole recessed portion, or a hexagonal hole recessed portion. And when rotating the screw shaft 40, as shown in FIG. 1, the rotation part of the electric tool (impact wrench) 51 may be fitted from the outside and driven. It can also be turned with a manual tool such as a socket wrench.

Reference numerals 60 and 60 denote a pair of roller shafts 70, 70 each having one end thereof rotatably attached to the left screw portion 41 and the right screw portion 42 of the screw shaft 40 via female screw block members 61, 61. A pair of free rollers 80 and 80 rotatably mounted on the roller shafts 60 and 60 are rotatably mounted on the free ends of the pair of roller shafts 60 and 60, and the bottom of the vehicle Is a rotating roller whose height is substantially the same as the height of the bottom of the wheel 30 on the cart frame 20 side.
Therefore, when the screw shaft 40 is rotated, the pair of roller shafts 60 and 60, the free rollers 70 and 70, and the rotating rollers 80 and 80 are integrated as shown by an arrow A depending on the rotating direction. Move. That is, the interval between the free rollers 70 and 70 is expanded or contracted by opening or closing.

  Reference numerals 90 and 90 denote a pair of slope members attached to the inside of the short frame portions 22 and 22 of the carriage frame 20, that is, the free rollers 70 and 70 side. On the upper surface side of each of the slope members 90, 90, when the free rollers 70, 70 are close to the short frame portions 22, 22 side of the carriage frame 20, there are provided inclined surfaces 91, 91 on which the free roller surface is placed. It is. Therefore, the presence of the slope members 90, 90 allows the free roller surfaces when the pair of free rollers 70, 70 move to a predetermined large distance, for example, near the short frame portions 22, 22 side of the carriage frame 20. Are lifted on the inclined surfaces 91 and 91, and the pair of free rollers 70 and 70 themselves are lifted with the rotation of the female screw block members 61 and 61. In other words, the rotary rollers 80 and 80 of the free rollers 70 and 70 are in a state of floating from the bottom surface position of the wheel 30 on the cart frame 20 side. One side of this state is shown in FIG. The attachment positions of the slope members 90, 90 are not particularly limited as long as the free rollers 70, 70 are lifted up.

  Reference numerals 92 and 92 are free roller stopper members for restricting excessive floating of the free rollers 70 and 70 at this time. For example, it is made of a plate material and is provided on the short frame portions 22 and 22 side of the carriage frame 20.

  Reference numeral 100 denotes a stopper member for a vehicle tire, which includes, for example, a rubber or elastic plastic rotating roller provided on the long piece frame portion 21 of the carriage frame 20. In this test, the position of the vehicle tire is regulated. 110... Are anti-slip members made of elastic rubber or the like provided on the outer surface side of the short piece frame portions 22, 22 of the carriage frame 20 and the rotating roller 80 of the free roller 70. As described above, when the pair of free rollers 70, 70 are lifted, the rotary rollers 80, 80 of the free rollers 70, 70 are open relative to the short frame portions 22, 22 of the carriage frame 20, When not in use, both can be stood as legs. These slip prevention members 110... Prevent the slip at this time.

  A cover 120 is placed on the long frame portion 21 side of the carriage frame 20 to hide the structural portion on the long frame portion 21 side, and on the rotating screw shaft 40 and the moving female screw block members 61 and 61 side. It is possible to prevent the operator's body and clothes from touching or intruding inadvertently. In FIG. 1 to FIG. 2, it is indicated by a broken line (two-dot chain line). The cover 120 is not limited to a simple flat plate, but may have a shape surrounding the aggregate on the cart frame 20 side. Reference numerals 131 and 132 are attached as necessary, a generally inverted U-shaped handle for operation, and a long bar-shaped handle. In particular, the handle 132 has a base that is a free-type shaft-attached portion 132a. Therefore, the handle 132b may be held at the time of transportation to the target vehicle. Note that when not in use, a bar-like portion may be sandwiched between the clip portions 132c.

Next, a speed test using the vehicle free roller device 10 will be described.
When the vehicle free roller devices 10 and 10 are used, the operations (1) to (3) in the above-described conventional device are substantially the same. That is, as shown in FIG. 5, in the speed measuring device 1, with the lift part 1b between the pair of rotating rollers 1a and 1a raised, the front wheel (vehicle tire) of the vehicle C is placed, and then the lift part 1b And the front wheel is dropped between the pair of rotating rollers 1a and 1a. In this state, since the position of the rear wheel portion is determined, the center of the rear wheel is roughly determined, and the two free roller devices 10 and 10 for the vehicle are temporarily placed on the side thereof.

  Thereafter, the vehicle free roller device 10 is inserted into the lower part of the vehicle from the side of the rear wheel of the vehicle, that is, from the direction of the arrow B between the free rollers 70 and 70 shown in FIGS. Thus, the respective free rollers 70, 70 are positioned on the front and rear of the vehicle tire side.

  At this time, if the gap between the free rollers 70 and 70 is wide, the rotary rollers 80 and 80 on the free rollers 70 and 70 side are lifted by the action of the slope members 90 and 90 as described above. Therefore, the vehicle 30 on the cart frame 20 side, that is, the caster can be easily and quickly inserted. For this reason, the conventional heavy labor of sliding heavy objects is eliminated.

In this manner, when the vehicle free roller devices 10 and 10 are inserted into the vehicle tire portion, the screw shaft 40 is rotated by the electric tool 51 in a direction in which the distance between the free rollers 70 and 70 is reduced. Then, since both free rollers 70 and 70 move to the center side at the same speed, first, they come into contact with the front and rear of the vehicle tire. At this time, even if there is a misalignment of the center alignment and one of the rollers comes into contact a little earlier, the center alignment is automatically performed by continuously rotating the screw shaft 40.
Therefore, in the case of this apparatus, it is not necessary to make fine adjustments for center adjustment with great care during temporary placement. That is, good workability can be obtained.

The space between the free rollers 70, 70, when a predetermined interval, stopping the rotation of Ne Jishafuto 40. As a result, the vehicle tire is lifted and a predetermined idling (idling) state is obtained. In other words, the speed test is ready. Thereafter, a predetermined speed test may be performed.

  According to this work process, the operations (4) to (7) in the above-described conventional apparatus are performed as follows: lift of the lift, retraction of the vehicle by about 60 cm, and fine adjustment of the free roller device that has been screwed in. Work such as forward movement of the vehicle and lowering of the lift portion is unnecessary.

  When the speed test is completed, the screw shaft 40 is rotated by the electric tool 51 in the opposite direction to the above. If it does so, since the space | interval between both the free rollers 70 and 70 will spread, it will remove | deviate from a vehicle tire automatically. When the distance between them becomes a predetermined size, as described above, both the free rollers 70 and 70 are lifted, so the vehicle 30 on the cart frame 20 side, that is, a caster, can be easily and quickly moved to the lower part of the vehicle. Can be taken out from. For this reason, the conventional heavy labor of pulling out a heavy object while sliding is eliminated.

Even in this operation process, the operations (11) to (12) in the above-described conventional apparatus, that is, operations such as retreating the vehicle by about 60 cm and drawing a heavy object become unnecessary.
Thus, when the free roller devices 10 and 10 for the vehicle are used, the number of work steps can be significantly reduced. That is, a significant improvement in workability can be obtained.

  Moreover, since both free rollers 70 and 70 can be made open with respect to the short piece frame portions 22 and 22 of the carriage frame 20 by the action of the slope members 90 and 90, both of the free rollers 70 and 70 are legged when not in use. Can be used as a part. For example, it can be stood and stored. Space saving can be achieved. At this time, since the anti-slip member 110 is provided on both, a stable holding state can be obtained. Furthermore, since the stopper member 92 is provided for lifting the free rollers 70, 70 by the slope members 90, 90, the danger of excessive lifting is effectively prevented. Since the stopper member 100 for vehicle tires is provided on the side of the long frame portion 21 of the carriage frame 20, stable workability can be obtained. In addition, when the cover 120 is put on the long frame portion 21 side of the carriage frame 20, there is no risk that the operator's body or clothes may inadvertently touch or invade the internal drive unit. Stable workability can be obtained.

It is the perspective view which showed an example of the free roller apparatus for vehicles which concerns on this invention. It is the partial cross-sectional top view which abbreviate | omitted one part used as the free roller apparatus for vehicles of FIG. It is the fragmentary perspective view which showed the lifted state of the free roller used as the vehicle free roller apparatus of FIG. It is the schematic explanatory drawing which showed an example of the method of a speed test. It is the schematic explanatory drawing which showed one process by the speed test method of FIG. It is the schematic explanatory drawing which showed one process by the speed test method of FIG. It is the schematic explanatory drawing which showed one process by the speed test method of FIG.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 ... Free roller apparatus for vehicles, 20 ... Approximate U type bogie frame, 21 ... Long piece frame part, 22 ... Short piece frame part, 30 ... Wheel, 40 ... Roller space | interval Telescopic screw shaft, 41... Left screw portion, 42... Right screw portion, 44, 45... Bearing, 50. Free roller, 80 ... Rotating roller, 90 ... Slope member, 91 ... Ascending slope, 92 ... Stopper member for free roller, 100 ... Stopper member for vehicle tire, 110 ...・ Anti-slip material

Claims (4)

A free roller device for a vehicle that rotatably supports a vehicle tire with a pair of free rollers, a roughly U-shaped carriage frame having a short frame portion extending in the same direction from both ends of the long frame portion, and A plurality of wheels provided on the bottom side of the bogie frame, a left screw portion and a right screw portion are connected at approximately the center, and the roller interval is expanded and contracted in the vicinity of the long frame portion side of the bogie frame. A pair of screw shafts, a shaft rotation operation portion projecting from at least one free end of the screw shaft, and a left screw portion and a right screw portion of the screw shaft, one end of which is rotatably mounted. A roller shaft, a pair of free rollers rotatably mounted on the respective roller shafts, a shaft rotatably mounted on a free end side of the pair of roller shafts, and a height of the bottom of the vehicle Frame side car A rotating roller that is substantially the same as the height of the bottom of the vehicle, and attached to the free roller side of both short piece frame portions of the bogie frame, when the free roller is close to the short frame portion side of the bogie frame, A free roller device for vehicles, comprising a pair of slope members having rising and inclined surfaces on which the free roller surface is placed. 2. The vehicle free roller device according to claim 1, wherein a stopper member for a free roller is provided in the vicinity of the upper surface side of the pair of slope members. The vehicle free roller device according to claim 1, wherein a stopper member for a vehicle tire is provided on the long frame portion side of the carriage frame. 4. The vehicle free roller device according to claim 1, wherein an anti-slip member made of elastic rubber or the like is provided on the short frame portion side of the carriage frame and the outer surface of the free roller.

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