JP4209358B2 - Vehicle carrier - Google Patents

Description

  The present invention relates to a vehicle transporter capable of sliding a loading platform rearward with respect to a vehicle frame, arranging the loading platform in an inclined manner between the vehicle frame and the ground, and loading and unloading a vehicle between the loading platform and the ground. It is.

Conventionally, as this type of vehicle transport vehicle, a loading platform on which a vehicle is placed is provided on a vehicle frame so as to be slidable in the front-rear direction. When loading the vehicle on the loading platform, the loading platform is slid rearward so that the loading platform is tilted across the rear end of the vehicle frame and the ground so that the rear end is grounded to the ground. To do. Subsequently, the step board provided at the rear end of the loading platform is rotated and brought into contact with the ground. After the vehicle is placed on the loading platform from the ground through the walking plate, the loading platform is slid forward to return to the original level. By arranging in a state, the vehicle loaded on the loading platform is carried (for example, refer to Patent Document 1).
JP 2002-87142 A

  However, in the conventional vehicle transport vehicle, when the loading platform is tilted rearward, the loading platform is always arranged in a straight line with respect to the vehicle frame. For this reason, for example, the vehicle cannot be loaded if there is not enough space in front of the vehicle to be loaded so that the transport vehicle is parked and the loading platform is slid rearward. Conversely, when the transport vehicle is parked and the loading platform is slid rearward, the vehicle cannot be lowered unless there is enough space to lower the vehicle behind the vehicle.

  In other words, if there is not enough space to arrange the vehicle carrier with the loading platform slid rearward and the vehicle to be loaded and unloaded in a straight line, the vehicle cannot be loaded and unloaded, which is a major factor that hinders loading and unloading work. It was.

  The present invention has been made in view of the above-described problems, and the object of the present invention is to make it possible to turn left and right after placing the loading platform inclined to the rear of the vehicle frame, so that Even if the vehicle to be unloaded cannot be arranged in a straight line, the vehicle transport vehicle that can ease the loading and unloading work by relaxing the space restrictions that allow the vehicle to be loaded and unloaded by the swivel movement of the loading platform Is to provide.

  In order to achieve the above object, the vehicle transport vehicle of the invention according to claim 1 is provided with a tilting frame that can be tilted rearward on the vehicle frame, and a loading platform on which the vehicle can be placed is slidable on the tilting frame. It is mounted, and it is configured so that the loading platform tilts at the rear end of the vehicle frame while the tilting motion of the tilting frame by sliding rearward of the loading platform, the rear end touches the ground, and the vehicle can be loaded and unloaded on the loading platform. In the vehicle transport vehicle, the tilt frame is provided with a slider that is slidable in the front-rear direction along the tilt frame, and a first slide cylinder is connected to a front portion of the slider and a front portion of the tilt frame. The second slide cylinder is connected to the rear part of the slider and the rear part of the loading platform, and the upper surface of the slider is further loaded by the extension operation of the second slide cylinder. When the slid to the halfway position with respect to the tilting frame, the engaging pin provided at the front part of the loading platform is projected from the front, and the loading platform is tilted to the ground and grounded. The loading platform is provided so as to be able to turn left and right around the engaging pin with which the engaging piece is engaged.

  A vehicle transport vehicle according to a second aspect of the present invention has a turning mechanism for turning the entire loading platform to the left and right around the engagement pin in a state where the trailing edge is lifted upward on the bottom surface of the loading platform. Is provided.

  According to the present invention, the loading regulation of the vehicle is appropriately moved according to the surrounding space where the vehicle is loaded and unloaded, thereby loading and unloading the vehicle, thereby relaxing the space regulation that allows the vehicle to be loaded and unloaded, and smoothing the loading and unloading work. Can proceed.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 shows the configuration of a vehicle carrier.

  In FIG. 1, reference numeral 1 denotes a vehicle frame of a vehicle transporter, and a loading platform 2 on which a vehicle can be placed is provided on the vehicle frame 1 via a tilting frame 3.

  The tilting frame 3 includes a pair of left and right channel-shaped frame members 31 (see FIG. 3) arranged in the front-rear direction at a predetermined interval, and the opening of each frame member 31 is disposed inside. Yes.

  The tilting frame 3 has a length that protrudes rearward from the front portion of the vehicle frame 1 with respect to the vehicle frame 1, and is placed on the vehicle frame 1 via the subframe 11. The end portion is provided so as to be rotatable about the hinge 32.

  The loading platform 2 is provided with a pair of left and right channel-shaped frame members 21 (see FIG. 3) at the bottom thereof in the front-rear direction with the same interval as the frame member 31 and with the opening inside. 21 is slidable in the longitudinal direction (front-rear and rearward) via the guide means 4 by the expansion and contraction operation of first and second slide cylinders 6 and 7 to be described later with 21 being placed on the frame member 31. .

  The guide means 4 is for stably performing the sliding movement of the loading platform 2 with respect to the tilting frame 3, and as shown in FIGS. 2 and 3, respectively, on both sides of the rear end of the tilting frame 3 via swing arms 42. A provided guide roller 41 and a swing cylinder 45 that swings the guide roller 41 up and down are provided.

  The guide roller 41 is a roller with a flange having a flange portion 41b at each outer end of the roller body 41a, and a shaft portion 41c thereof is rotatably supported by the rear end portions of the pair of left and right swing arms 42.

  The front end portions of each pair of left and right swing arms 42 are integrally provided at each outer end portion of a connecting rod 43 supported by the left and right frame members 31. Each flange 41b sandwiches the outer side surfaces of the left and right frame members 21, and thereby restricts the movement of the loading platform 2 in the horizontal direction (width direction) relative to the tilting frame 3, thereby tilting the loading platform 2. It is made to slide stably on the frame 3.

  The oscillating cylinder 45 is disposed at the central part between the frame members 31 serving as the rear end part of the tilting frame 3, and the base end part thereof is pivotally supported via a bracket on the connecting member 3 a connected between the frame members 31. At the same time, the rod end is pivotally supported at the distal end portion of the operating arm 46 in which the base end portion is integrally provided at the center portion of the connecting rod 43.

  Therefore, by the expansion / contraction operation of the swing cylinder 45, the flange 41b of the guide roller 41 is disposed at a position where the outer surface of the frame 21 is sandwiched and a position where the flange 41b is retracted downward from the outer surface.

  The tilting frame 3 is provided with a slider 5 slidable in the front-rear direction. Specifically, as shown in FIGS. 4 and 5, the slider 5 is provided with rollers 52 on both sides of a block body 51 having a rectangular shape in plan view arranged between the frame members 31. By disposing the roller 52 in each frame material 31, the roller 52 can be moved back and forth along the frame material 31.

  As shown in FIG. 1, in the state of traveling with the loading platform 2 placed on the vehicle frame 1, the slider 5 is disposed at a substantially central portion in the front-rear direction of the tilting frame 3. The first slide cylinder 6 is connected to the second slide cylinder 7 and the second slide cylinder 7 is connected to the rear part.

  Specifically, the first slide cylinder 6 is disposed at the center between the frame members 31, and the base end portion 61 is supported by the front portion of the tilting frame 3 as shown in FIG. As shown in FIGS. 4 and 5, the end 62 is rotatably supported by a horizontal shaft 63 at the front portion of the block body 51 of the slider 5.

  The second slide cylinder 7 is disposed at the center between the frame members 21, and the base end portion 71 is rotatable at the rear end portion of the loading platform 2 by a vertical shaft (not shown) as shown in FIG. 1. As shown in FIGS. 4 and 5, the rod end 72 that is supported and extended is rotatably supported by a vertical shaft 73 erected on the rear portion of the block main body 51.

  An engaging pin 53 projects upward from the upper surface of the slider 5. When the loading platform 2 slides backward with respect to the tilting frame 3, the engagement pin 53 engages with an engagement piece 22 (see FIG. 1) provided on the front bottom surface of the loading platform 2 in the middle of the sliding. Has been made.

  Specifically, as shown in FIG. 6, the engagement piece 22 is disposed between the frame members 21 at the front portion of the loading platform 2, and the engagement hole corresponding to the engagement pin 53 at the center of the rear end edge. 22a is formed, and the engagement hole 22a is inserted into the engagement pin 53 from the front to be engaged with each other. And the flange part 53a is formed in the upper end of the engagement pin 53, and when the engagement piece 22 is engaged, the said engagement piece 22 is prevented from dropping | disconnecting upwards unexpectedly.

  A support roller 23 is provided at the bottom of the rear end of the loading platform 2 so that the grounded loading platform 2 can smoothly move back and forth when the vehicle is loaded and unloaded.

  Furthermore, a step board 24 is rotatably provided at the rear end of the loading platform 2. The step board 24 is provided between the rear end of the loading platform 2 and the ground for smooth loading and unloading of the vehicle, and is arranged in an upright state during traveling.

  On the other hand, on the bottom surface of the rear end portion of the loading platform 2, a turning mechanism 8 (FIG. 7) for lifting the rear end portion upward to turn the entire loading platform 2 left and right with the support roller 23 slightly lifted from the ground. A pair of reference) is provided on the left and right sides of the rear end of the loading platform 2.

  As shown in FIG. 7, each turning mechanism 8 includes an operating arm 82 provided with wheels 81 and an operating cylinder 85 that rotates the operating arm 82 in the vertical direction.

  Each operating arm 82 is arranged in a pair on the left and right sides with a predetermined distance (only the front side is shown in FIG. 7), and the rear end portion of these operating arms 82 is rotated by the horizontal shaft 82a on the bottom surface of the rear end portion of the loading platform 2. It is supported freely. The wheel 81 is rotatably disposed between the operation arms 82 so as to rotate in the left-right width direction of the loading platform 2, and the axle of the wheel 81 is an output of a drive motor 83 provided between the operation arms 82. It is connected to the shaft.

  For example, a hydraulic motor is used as the drive motor 83, and the wheels 81 are similarly rotated in the forward and reverse directions by rotationally driving the drive motor 83 in the forward and reverse directions.

  On the other hand, the operating cylinder 85 is disposed in front of the operating arm 82, the base end portion is supported by the horizontal shaft 85 a at the bottom of the loading platform 2, and the telescopic rod end is the front end portion of the operating arm 82. Is supported rotatably by a horizontal shaft 82b.

  Accordingly, when the operating cylinder 85 is extended from the state shown in FIG. 7, the operating arm 82 is rotated downward on the loading platform 2 around the horizontal shaft 82a at the rear end. As a result, the wheel 81 is grounded, and the operating cylinder 85 is further extended to lift the rear end of the loading platform 2 upward so that the support roller 23 floats to a predetermined height from the ground as shown in FIG. .

  Subsequently, by driving the wheels 81 in the forward and reverse directions by the drive motor 83 in this state, the loading platform 2 is turned left and right with respect to the tilting frame 3 as will be described later.

  Although not shown, a tilt cylinder is connected between the tilt frame 3 and the vehicle frame 1. The tilting cylinder serves as a damper that suppresses excessive tilting and overturning operations of the tilting frame 3, and the piston side chamber and the rod are moved by a hydraulic circuit (not shown) along with the tilting and overturning of the tilting frame 3. It is configured so that the expansion and contraction operation is performed spontaneously by supplying and discharging oil to and from the side chamber.

  FIG. 9 shows a hydraulic circuit for driving the first and second slide cylinders 6 and 7, the swing cylinder 45, the drive motor 83, and the working cylinder 85 described above.

  In FIG. 9, P is a pump whose suction side is communicated with the oil tank T, and the discharge side of the pump P is communicated in series with the four first to fourth electromagnetic switching valves 92 to 95 via the oil passage 91. The return oil passage 91a communicates with the oil tank T. Further, the oil passage 91 and the return oil passage 91a downstream of the first electromagnetic switching valve 92 are communicated with each other by an oil passage 97 in which a main relief valve 96 is interposed.

  The first to fourth electromagnetic switching valves 92 to 95 are three-position switching valves each having four ports, and each of the first and second slide cylinders 6 and 7, the swing cylinder 45, and each drive motor 83 through each oil passage. These are communicated with each operating cylinder 85.

  Specifically, the first electromagnetic switching valve 92 is for switching the expansion / contraction operation of the first slide cylinder 6, and one port on the first slide cylinder 6 side is connected to the first slide cylinder 6 by the oil passage 98. The other side port communicates with the rod side chamber of the first slide cylinder 6 through an oil passage 99. A flow rate adjustment valve 100 is interposed in the oil passage 99, and a check valve 101 is provided to bypass the flow rate adjustment valve 100.

  The second electromagnetic switching valve 93 is for switching the expansion / contraction operation of the second slide cylinder 7, and one port on the second slide cylinder 7 side is communicated with the rod side chamber of the second slide cylinder 7 through the oil passage 102. The other port communicates with the piston side chamber of the second slide cylinder 7 through the oil passage 103. A flow rate adjustment valve 104 is interposed in the oil passage 102, and a check valve 105 is provided to bypass the flow rate adjustment valve 104.

  The oil passage 102 and the oil passage 103 are communicated with each other by an oil passage 106, and two sub-relief valves 107 and 108 are interposed in the oil passage 106, and an oil between the sub-relief valves 107 and 108. The passage 106 and the return oil passage 91 a are communicated with each other by an oil passage 109.

  Further, the oil passage 102 and the oil passage 109 are communicated by an oil passage 111 having a check valve 110, and the oil passage 103 and the oil passage 109 are communicated by an oil passage 113 having a check valve 112.

  The third electromagnetic switching valve 94 is for switching the expansion / contraction operation of the oscillating cylinder 45 and the operating cylinder 85, and one port on the side of the oscillating cylinder 45 etc. is connected to the piston side chamber of each operating cylinder 85 by the oil passage 114. The other side port communicates with the rod side chamber of each working cylinder 85 and the piston side chamber of the swing cylinder 45 through an oil passage 115.

  The fourth electromagnetic switching valve 95 is for switching the rotational drive of each drive motor 83 in the forward and reverse directions. One port on the drive motor 83 side is connected to one port of each drive motor 83 by the oil passage 116. The other port communicates with the other port of each drive motor 83 through an oil passage 117.

  Next, the operation of the vehicle transport vehicle configured as described above will be described.

  When a vehicle is loaded on the loading platform 2, when the loading platform 2 is placed on the vehicle frame 1 as shown in FIG. The electromagnetic switch valve 93 is switched from the neutral position to the left position, and the second slide cylinder 7 is extended.

  As a result, the loading platform 2 starts to slide backward with respect to the tilting frame 3, the loading platform 2 moves rearward, and the center of gravity moves rearward of the hinge 32, so that the tilting frame 3 tilts gradually backward with respect to the vehicle frame 1. The loading platform 2 slides backward on the tilting frame 3 while gradually tilting together with the tilting frame 3.

  At this time, the third electromagnetic switching valve 94 is also switched to the left position, and pressure oil is supplied so as to extend the swing cylinder 45. Accordingly, the flange 41b of the guide roller 41 is in a state of sandwiching the outer surfaces of the left and right frames 21, whereby the cargo bed 2 slides backward on the tilting frame 3 in a stable state.

  Then, when the second slide cylinder 7 is extended to the point where it extends most, the engagement hole 22 a of the engagement piece 22 of the loading platform 2 engages with the engagement pin 53 of the slider 5. Then, this is detected by a detector such as a limit switch, and the second electromagnetic switching valve 93 is switched to the neutral position to stop the extending operation. This is to leave enough room for the second slide cylinder 7 to extend when the loading platform 2 described later turns.

  At this time, as shown in FIG. 10, the loading platform 2 is grounded by the support roller 23 provided at the rear end thereof. When the ground is inclined to the rear, the support roller 23 may not be grounded even when the engagement piece 22 is engaged with the engagement pin 53. However, if the ground is flat, the support roller 23 is grounded. Usually set to do.

  Next, when the first electromagnetic switching valve 92 is switched from the neutral position to the right position and the first slide cylinder 6 is extended, the slider 5 is moved while the engagement piece 22 remains engaged with the engagement pin 53. By moving rearward along the frame material 31, the loading platform 2 further moves rearward. Therefore, as described above, even when the support roller 23 is not grounded when the second slide cylinder 7 is not extended, the support roller 23 is grounded by the extension of the first slide cylinder 6 and the loading platform 2 moves rearward.

  In this case, the loading platform 2 is arranged at the rear of the vehicle frame 1 with the inclination angle gradually decreasing as the vehicle moves backward, and when the first slide cylinder 6 is extended to the minimum, the inclination angle is the smallest as shown in FIG. Is done.

  If the support roller 23 of the loading platform 2 is grounded in this way, the turning operation of the loading platform 2 described below becomes possible. That is, if the engagement piece 22 is engaged with the engagement pin 53 and the support roller 23 is in contact with the ground, the turning operation is performed at any position regardless of the rearward movement position of the loading platform 2 with respect to the vehicle frame 1. Can be made. Therefore, when the loading platform 2 is moved to a desired rear position according to the space around which the vehicle is loaded, the extension of the first slide cylinder 6 is stopped by switching the first electromagnetic switching valve 92 to the neutral position. .

  Then, in the turning operation of the loading platform 2, first, the third electromagnetic switching valve 94 is switched to the right position to extend each working cylinder 85. As a result, the wheel 81 moves downward via the operating arm 82 and comes into contact with the ground, and then the rear end portion of the loading platform 2 is lifted upward so that the support roller 23 is lifted from the ground by a predetermined height (see FIG. 12). . At this time, since the third electromagnetic switching valve 94 is switched to the right position, the guide means 4 does not hinder the swinging of the loading platform 2 that is continuously performed by the guide roller 41 because the swing cylinder 45 is retracted. In this way, the frame 21 is retracted downward.

  Subsequently, in this state, the fourth electromagnetic switching valve 95 is switched to the right position or the left position so that the wheel 81 is rotated in the direction in which the loading platform 2 is to be rotated, and the drive motor 83 is rotated forward or backward. The loading platform 2 is arranged by turning to the right side or the left side around the engagement pin 53 engaged with the engagement piece 22.

  At this time, since the connecting position of the rod end 72 to the slider 5 is different from the engaging pin 53 which is the turning center of the loading platform 2, the second slide cylinder 7 is accompanied by the rotation of the loading platform 2 due to the difference in the rotation trajectory. Although it is necessary to extend, this is dealt with by the hydraulic circuit shown in FIG.

  That is, when a predetermined force is applied to the sub-relief valve 107 by applying a force in the extending direction to the second slide cylinder 7, the sub-relief valve 107 is opened to release the oil in the rod side chamber, and the released oil is discharged to the oil passage. The second slide cylinder 7 is allowed to extend by being fed to the piston side chambers 113 and 103 and supplying insufficient oil through the oil passage 109. Note that the second slide cylinder 7 that is extended when the loading platform 2 is swung back to the original linear position is reversely retracted by a force in the contraction direction acting on the second slide cylinder 7. When a predetermined pressure is applied to the relief valve 108, the sub-relief valve 108 is opened to release the oil in the piston side chamber, the released oil is sent to the rod side chamber through the oil passages 111 and 102, and excess oil is supplied to the oil passage 109. Through the oil tank T.

  In addition, the second slide cylinder 7 is obliquely displaced from the center of the cargo bed 2 as the cargo bed 2 turns. However, since both ends of the second slide cylinder 7 are supported by the vertical shaft 73 and the like, Movement can be tolerated.

  Thereby, for example, as shown by a one-dot chain line or a two-dot chain line in FIG.

  Then, with the loading platform 2 pivoted as described above, the step board 24 is rotated downward from the standing position and grounded to the ground, and the vehicle is mounted on the loading platform 2 through the step board 24, for example, an accessory such as a winch. Use to load.

  When the vehicle is loaded on the loading platform 2 in this way, the loaded loading platform 2 is returned to the rear position in a straight line with respect to the vehicle frame 1 by the reverse operation to the above, and then tilted by the same reverse operation as described above. The loading platform 2 is slid forward with respect to the frame 3, whereby the vehicle is placed on the vehicle frame 1 together with the loading platform 2 to finish loading.

  Also, when the loaded vehicle is unloaded, it can be carried out by turning the loading platform 2 appropriately after turning on the ground in the same manner as described above.

  In this case, the vehicle carrier 2 and the vehicle to be loaded / unloaded cannot be arranged in a straight line because the loading platform 2 is grounded and then swiveled to be placed at a desired position and the vehicle can be loaded in this state. Even so, by loading and unloading the loading platform appropriately according to the surrounding space where the vehicle is loaded and unloaded, the restrictions on the space where the vehicle can be loaded and unloaded can be relaxed, and the loading and unloading work can be carried out smoothly. Can proceed.

It is a side view which shows the whole structure of the vehicle transport vehicle of this invention. It is a side view which shows the structure of a guide means. It is a rear view which shows the structure of a guide means. It is a top view which shows the structure of a slider. It is a side view which shows the structure of a slider. It is a bottom view which shows the engagement piece by the side of a loading platform front part. It is a side view which shows the structure of a turning mechanism. It is a side view which shows the state which lifted the loading platform rear end part with the wheel of the turning mechanism. It is a hydraulic circuit diagram for driving the first and second slide cylinders and the like. It is a side view for demonstrating operation | movement of a vehicle transporter. It is a side view for demonstrating operation | movement of a vehicle transporter. It is a side view for demonstrating operation | movement of a vehicle transporter. It is a top view for demonstrating operation | movement of a vehicle transporter.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Vehicle frame 2 Loading platform 22 Engagement piece 3 Tilt frame 5 Slider 53 Engagement pin 6 1st slide cylinder 7 2nd slide cylinder 8 Turning mechanism

Claims (2)

A tilting frame is provided on the vehicle frame so as to be tiltable rearward, and a loading platform on which the vehicle can be placed is slidably mounted on the tilting frame, and the loading platform is moved along with the tilting operation of the tilting frame by sliding the loading platform rearward. In a vehicle transport vehicle configured so that the rear end of the vehicle frame is inclined at the rear end of the vehicle frame and the rear end is grounded, and the vehicle can be loaded and unloaded on the loading platform
The tilt frame is provided with a slider that is slidable in the front-rear direction along the tilt frame, and a first slide cylinder is connected to the front portion of the slider and the front portion of the tilt frame, and the rear portion of the slider and the loading platform A second slide cylinder is connected to the rear portion, and further, the upper surface of the slider is provided at the front portion of the loading platform when the loading platform slides halfway with respect to the tilting frame by the extension operation of the second sliding cylinder. An engagement pin that engages the engagement piece from the front protrudes, and in the state where the loading platform is inclined to the ground and grounded, the loading platform pivots to the left and right around the engagement pin with which the engagement piece is engaged. A vehicle carrier characterized by being provided freely. 2. A turning mechanism is provided on the bottom surface of the rear end portion of the loading platform for pivoting the entire loading platform left and right around the engagement pin in a state where the rear end portion is lifted upward. The vehicle carrier described.

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