JP4974705B2 - Vehicle carrier - Google Patents

Description

  The present invention relates to a vehicle transport vehicle in which a load carrier is moved backward and tilted rearward so that a transported vehicle can be loaded on the load carrier.

  This type of vehicle transport vehicle is configured such that the carrier is moved backward with respect to the inclined frame and the carrier is tilted backward together with the inclined frame so that the transported vehicle can be loaded on the carrier. In general vehicle transport vehicles, two types of telescopic cylinders are used: a tilt cylinder that tilts an inclined frame and a slide cylinder that moves a cargo bed back and forth. In this way, using two types of telescopic cylinders increases the number of parts and increases costs, and since there are two drive systems, it is necessary to operate both drive systems (both telescopic cylinders) when using the cargo bed. The operation was troublesome.

  By the way, FIG.11 and FIG.12 shows the vehicle carrier vehicle of patent 2532158 (patent document 1). In this known vehicle carrier vehicle, an inclined frame 103 is pivotally supported at a rear end portion of a subframe 112 mounted on a chassis frame of the vehicle, while a loading platform 104 is movable back and forth on the inclined frame 103. It is installed in. In this known vehicle transport vehicle, the tilt frame 103 and the back and forth movement of the loading platform 104 can be simultaneously performed by a single telescopic cylinder 151 (FIG. 12).

  As shown in FIG. 12, the inclined frame 103 includes an outer member 131 and an inner member 132 that are slidable with respect to each other, and an intermediate portion in the longitudinal direction of the outer member 131 is attached to a rear end portion of the subframe 112 by a support shaft 108. It is pivotally supported. A link mechanism 109 including first to third links 191, 192, and 193 is provided between the distal end portion of the inner member 132 of the inclined frame 103 and the sub frame 112.

  As shown in FIGS. 11B and 11C, the links 191, 192, and 193 of the link mechanism 109 are relatively short for the second link 192 and relatively small for the third link 193. Long ones are used. The first to third links 191, 192, 193 are assembled as shown in FIG. 12, and have a considerably complicated configuration. That is, the first link 191 (with a guide groove) is configured such that the rear end portion thereof is pivotally supported on the subframe 112 by the hinge shaft 194 and can swing up and down. The proximal end of the second link 192 is pivotally supported by the hinge shaft 195 at the front end of the first link 191, and the distal end of the second link 192 and the distal end of the third link 193 are pivotally supported by the hinge shaft 196. ing. A roller 197 that fits into the guide groove of the first link 191 is attached to the base end portion of the third link 193, and the base end side of the third link 193 moves along the guide groove of the first link 191. It has come to be able to do. In the loading platform storage state shown in FIG. 11A, the second link 192 and the third link 193 of the link mechanism 109 are inclined to the front side.

  Further, a concave groove-shaped bearing portion 198 (FIG. 12) is provided at the distal end portion of the second link 192, and a shaft 133 provided at the distal end portion of the inclined frame 103 (inner member 132) is provided on the bearing portion 198. It is designed to be engaged and disengaged. 11A, the second link 192 is inclined forward, but in this posture, the bearing portion 198 is located at a position far behind the shaft 133 (FIG. 12) at the tip of the inclined frame. Waiting in a forward-open state.

  In this known vehicle transporter, when the telescopic cylinder 151 (FIG. 12) is reduced from the load storage state shown in FIG. 11 (A), the inner member 132 of the inclined frame 103 is retracted (the inclined frame 103 is reduced). After the shaft 133 at the tip of the inner member is fitted into the bearing portion 198 that is waiting in a forward-facing posture, the relatively short second link 192 is raised. At this time, as shown in FIG. 11B, the inclined frame 103 tilts backward by a predetermined angle, and the loading platform 104 moves rearward, and the grounding roller 143 at the rear end of the loading platform is grounded. Subsequently, when the telescopic cylinder 151 is further reduced from the state shown in FIG. 11B, a relatively long third link 193 is raised as shown in FIG. The tilt frame 103 is tilted until it comes in contact with the ground, and the loading platform 104 is displaced to a posture in which it is in contact with the ground horizontally.

Japanese Patent No. 2532158

  By the way, in the vehicle carrier of the known example (Patent Document 1) shown in FIG. 11 and FIG. 12, the tilting frame 103 can be tilted and the loading platform 104 can be moved back and forth at the same time with one telescopic cylinder 151. Although the drive system can be shared, the structure of the link mechanism 109 (using the first to third three links) for tilting the tilt frame 103 is complicated and has a considerable weight. Since 103 needs to be extendable, the structure of the inclined frame 103 is also complicated.

  Therefore, the known vehicle carrier shown in FIGS. 11 and 12 has a problem that the number of parts is large, the assemblability is poor, the cost is increased as a whole, and the weight of the link mechanism 109 is increased. .

  Further, in the case where the link mechanism 109 is used as the tilting support mechanism of the tilt frame 103 as in this known vehicle transport vehicle, the state shown in FIG. The second link 192 swings around the hinge shaft 195 (FIG. 12) until the state of 11 (B), and each link maintains a triangle from the state of FIG. 11 (B) to the state of FIG. 11 (C). As it is, it swings around the hinge shaft 194 (the link mechanism 109 swings in two steps). When the link mechanism 109 swings in this way, the tilting speed of the tilt frame 103 per the amount of expansion / contraction of the telescopic cylinder 151 changes in the initial standing stage, the standing intermediate stage, and the final standing stage of the link mechanism 109, The frame 103 is not tilted smoothly (at a constant speed). In particular, when the tilted frame 103 falls from the tilted state to the retracted position, there is a problem that the tilting speed near the retracted posture (horizontal posture) increases and a shock occurs in the tilted frame 103 at the end of the tilting. .

  Further, in the case where the link mechanism 109 is used as the tilting support mechanism of the tilt frame 103, a large cylinder output is required at the initial stage of the link mechanism 109. Therefore, the telescopic cylinder 151 has a large output corresponding to it (expensive). ) Must be used.

  Accordingly, the present invention provides a vehicle transport vehicle in which the tilt frame can be tilted and the loading platform can be moved back and forth at the same time with a single telescopic cylinder. Is intended to be able to tilt smoothly.

  The present invention has the following configuration as means for solving the above problems. Note that the present invention is directed to a vehicle transporter that allows a vehicle to be loaded on the carrier by moving the carrier backward and backward.

The vehicle transport vehicle of the present invention includes a vehicle having a chassis frame, an inclined frame that is supported to be tiltable at a rear end position of the chassis frame, and a loading platform that is supported on the inclined frame so as to be movable in the longitudinal direction of the vehicle, A tilting device provided between the tilting frame and the loading platform and having a single telescopic cylinder for moving the loading platform in the longitudinal direction of the vehicle with respect to the tilting frame, and tilting the tilting frame by the stretching motion of the stretching cylinder. It is equipped with.

  A pair of left and right subframes can be installed on the chassis frame, but those without a subframe can also be employed.

  The inclined frame is long and has a pair of left and right. The inclined frame is supported so as to be tiltable at the rear end position of the chassis frame (or sub-frame). However, the support portion may be a frame in which the inclined frame is pivotally supported. The chassis frame (or subframe) may be supported by a roller at the rear end position so that the inclined frame can be moved back and forth. When the tilt frame is supported in a state where it can be moved back and forth, another telescopic cylinder for moving the tilt frame back and forth may be provided.

  A grounding roller that rolls on the ground may be provided on the lower surface of the rear end of the loading platform. Moreover, the board boarding board can be attached to the rear-end part of a loading platform so that raising / lowering is possible.

  A tilting device for tilting the tilting frame includes a guide rail attached to the chassis frame, an extension cylinder, and a roller attached to the tube of the extension cylinder and moving along the guide rail.

  The guide rail has a pair of left and right. The guide rail may be directly fixed to the chassis frame. However, if the subframe (a pair of left and right) is installed on the chassis frame, the guide rail can be attached to the subframe. The shape of the guide rail (roller guide rail described later) is set so that the tilting frame can be smoothly tilted (at substantially constant speed) during the expansion / contraction operation of the telescopic cylinder.

  A telescopic cylinder having a considerably long stroke is employed. Note that only one telescopic cylinder is required. This telescopic cylinder is attached so that the cylinder rod is connected to the front portion of the inclined frame and the cylinder tube can be moved along the inclined frame in the vehicle longitudinal direction. The cylinder tube moves in the vehicle front-rear direction while maintaining a parallel posture in a side view with respect to the inclined frame.

  A roller that moves along the guide rail is attached to the tube of the telescopic cylinder, and the inclined frame can be gradually inclined backward by moving the roller to the rear side of the guide rail. That is, the inclined frame is supported so as to be tiltable at the rear end position of the chassis frame (or subframe), and the cylinder tube moves back and forth while maintaining a parallel posture with respect to the inclined frame in a side view. Therefore, when the telescopic cylinder is extended, the roller attached to the cylinder tube moves backward along the guide rail, whereby the inclined frame can be tilted backward through the cylinder tube.

  The guide rail has a length that can guide the entire moving range of the roller that moves in the entire extending / contracting range of the telescopic cylinder.

  A double speed device is provided between the inclined frame and the loading platform so that the loading platform can be moved back and forth by an amount twice that of the expansion and contraction of the expansion cylinder. This double speed device is used because the amount of forward / backward movement of the cargo bed cannot be sufficiently secured only by the expansion / contraction stroke of the expansion / contraction cylinder.

In this double speed device, a chain or a wire is used, and the chain or the wire is fixed to the loading platform and the inclined frame in a state where the chain or the wire is wound around a pulley attached to the tube of the telescopic cylinder.

  In the vehicle transport vehicle of the present application, the extension movement of the telescopic cylinder allows the tilting device to perform the backward tilting operation of the tilting frame and the backward movement of the loading platform at the same time so that the loading platform can be lowered to a substantially horizontal position near the ground. ing. In order to lower the loading platform to a substantially horizontal position near the ground, it is necessary to tilt the loading platform with respect to the tilting frame and change the tilting angle of the loading platform to a tilting angle smaller than the tilting angle of the tilting frame. In this case, the loading platform is installed so as to be tiltable with respect to the tilting frame around one point at the front end of the loading platform. Then, after the rear end portion of the loading platform is grounded by extending the telescopic cylinder, the tilt angle of the loading platform can be gradually reduced by further extending the expansion cylinder.

  The vehicle transport vehicle of the present application functions as follows. First, in the loading platform retracted state, the telescopic cylinder is contracted to the minimum and the roller attached to the telescopic cylinder is positioned near the front end of the guide rail, and the inclined frame is supported in a horizontal posture on the chassis frame. In this loading platform storage state, the loading platform is also supported in a horizontal posture at a position near the front of the vehicle.

  Next, in order to move the loading platform from the loading platform storage state to the loading posture position, the telescopic cylinder is extended. Then, as the tube of the telescopic cylinder moves backward along the inclined frame, the roller attached to the cylinder tube moves backward along the guide rail, thereby tilting the inclined frame backward via the cylinder tube. I will let you. Further, when the telescopic cylinder is extended, the loading platform is moved backward on the inclined frame at a speed twice the extension speed of the telescopic cylinder by the double speed device.

  Then, the loading platform can be brought into the vehicle loading posture by moving the loading platform rearward until the rear lower surface (grounding roller) of the loading platform is in contact with the ground. By the way, when the telescopic cylinder is extended and the lower surface of the rear end of the loading platform comes into contact with the ground, the inclination angle of the loading platform is about 10 ° at which a general vehicle can be loaded. In this state, the front end of the loading platform is an inclined frame. It is located in front of the rear end of the rear, leaving room for the cargo bed to move backward with respect to the inclined frame.

  When the telescopic cylinder is further extended from the state where the rear end of the loading platform is in contact with the ground (loading platform inclination angle is about 10 °), the inclination angle of the inclined frame becomes larger (finally the rear end of the inclined frame). On the other hand, as the platform further moves backward (the ground roller rolls on the ground), the height of the front of the platform decreases, and the inclination angle of the platform gradually decreases. . The loading platform can be moved back to a position where the front end of the loading frame reaches the vicinity of the rear end of the inclined frame. Is lowered to a very low position, so the platform is lowered to a substantially horizontal position near the ground. The substantially horizontal position in the vicinity of the ground includes a state where the loading platform is grounded at a very gentle inclination angle (for example, an inclination angle of about 3 to 4 °).

  By the way, in the vehicle transport vehicle of the present invention, the guide rail has a length that can guide the entire moving range of the roller moving in the entire expansion / contraction range of the expansion / contraction cylinder, so that the expansion / contraction cylinder fully extends from the fully contracted state. In the range in which the roller moves by the time, the roller does not come off the guide rail. Therefore, the roller is supported by the guide rail while the loading platform moves through the entire movement range from the retracted state to the vehicle loading posture state, and the inclined frame is stably supported via the roller and the tube of the telescopic cylinder. Can do. That is, the inclined frame is supported at two positions of the support portion (first support location) at the rear end of the chassis frame and the roller portion (second support location) guided by the guide rail over the entire movement range of the loading platform. The

  In order to store the loading platform on the transport vehicle (chassis frame) from the vehicle loading posture state, the loading platform is operated in the reverse order to the operation to the vehicle loading posture.

  The vehicle transport vehicle according to the present invention has the following effects when the tilt frame is tilted and the platform is moved back and forth simultaneously with a single telescopic cylinder.

  First, since the tilting device of the tilting frame is composed of a guide rail, a telescopic cylinder, and a roller attached to the cylinder tube, the tilting device has a configuration compared to, for example, that of the link type shown in FIGS. It becomes simple (the number of parts is small and the assemblability is good), and it is lightweight and can be manufactured inexpensively as a whole.

  In addition, when a guide rail type tilting device is used as the tilting device, it can be achieved only by setting the shape of the guide rail (roller guide rail) in order to tilt the tilting frame smoothly (almost at a constant speed). The shape of the guide rail can be easily set, so that a configuration for smoothly tilting the tilt frame (at substantially constant speed) can be easily manufactured.

  Further, since the guide rail has a length that can guide the entire moving range of the roller moving in the entire expansion / contraction range of the expansion / contraction cylinder, the roller does not come off the guide rail in the entire expansion / contraction range of the expansion / contraction cylinder. Therefore, the inclined frame is supported at two positions of the support portion (first support location) at the rear end of the chassis frame and the roller portion (second support location) guided by the guide rail over the entire movement range of the loading platform. Therefore, the inclined frame can be stably supported.

  In addition, a double speed device is used to move the loading platform back and forth so that the loading platform can be moved by an amount twice the expansion / contraction amount of the expansion / contraction cylinder, so that the loading platform is lowered to a substantially horizontal position near the ground. Sufficient loading capacity can be secured.

  Hereinafter, the embodiment of the present application will be described with reference to FIGS. 1 to 10. FIGS. 1 to 7 show a vehicle carrier of the first embodiment, and FIGS. 8 to 10 show the vehicle of the second embodiment. A truck is shown.

[First Example of FIGS. 1 to 7]
The vehicle carrier of the first embodiment is fixed to a vehicle 1 having a pair of left and right chassis frames 11 and 11 and subframes 12 and 12 on the chassis frames 11 and 11 as shown in FIGS. Guide rails 2 and 2, a pair of left and right inclined frames 3 and 3 supported in a tiltable manner at the rear ends of the sub-frames 12 and 12, and movable in the vehicle longitudinal direction on the respective inclined frames 3 and 3. And a telescopic cylinder 51 for moving the cargo platform 4 in the longitudinal direction of the vehicle with respect to the inclined frames 3 and 3, and the inclined frames 3 and 3 are guided together with the cargo bed 4 by the expansion and contraction of the telescopic cylinder 51. And a tilting device 5 for tilting with respect to the rails 2 and 2.

  In the following description, the front or front part refers to the front side of the vehicle 1, and the rear or rear part refers to the rear side of the vehicle 1.

  In this embodiment, subframes 12 and 12 are fixed on left and right chassis frames 11 and 11, respectively. The rear ends of the subframes 12 and 12 are connected by a connecting portion 13. On the upper surfaces of the rear end portions of the sub-frames 12 and 12, slidable contact plates 14 and 14 for sliding the bottom frames 42 and 42 of the loading platform 4 described later are attached. In other embodiments, a configuration in which the subframe 12 is not provided on the chassis frame 11 can be employed.

  Each of the left and right guide rails 2 and 2 uses a U-shaped frame material having a predetermined length. The guide rails 2 and 2 are fixed to the left and right sub-frames 12 and 12 in a state in which the guide rails 2 and 2 are directed in the vehicle longitudinal direction. When the subframes 12 and 12 are not used, the guide rails 2 and 2 are directly attached to the chassis frames 11 and 11.

  The shape (guide rail) of each of the guide rails 2 and 2 is set so that the tilted frames 3 and 3 can be tilted smoothly (substantially at a constant speed) when the telescopic cylinder 51 is expanded and contracted. Specifically, each of the guide rails 2 and 2 includes an upward inclined portion 21 inclined upward toward the front portion, a horizontal portion 22 at the intermediate portion, and a downward inclined portion 23 inclined downward toward the rear portion. It is formed continuously. In another embodiment, the horizontal portion 22 of the guide rail 2 can be extended rearward as it is, and the downward inclined portion 23 can be omitted. Each guide rail 2, 2 is formed with an inward guide groove 24 over its entire length.

  Each inclined frame 3, 3 uses a long H-shaped steel in the front and rear direction. Each of the inclined frames 3 and 3 has a length that is considerably longer than the entire length of the chassis frame 11. An inward guide groove 31 and an outward guide groove 32 are formed on the left and right sides of each of the inclined frames 3 and 3 over the entire length. The inclined frames 3 and 3 are connected by a connecting member 33 in the vicinity of the central portion in the length direction.

  Downward supporting legs 34 are attached to the rear ends of the inclined frames 3 and 3, respectively. In the other embodiments, those not provided with the support legs 34 can be adopted, and in this case, the lower surface of the rear end of the inclined frame 3 is grounded when the inclined frame 3 is inclined backward. As described above, when the support leg 34 is not provided, the height of the rear end portion of the tilt frame 3 can be lowered when the tilt frame 3 is tilted rearward and contacted, and the load carrier 4 is moved rearward to the maximum as described later. The height of the front end of the loading platform can be further lowered (the loading platform inclination angle in the usage state can be made closer to a horizontal posture).

  Each inclined frame 3, 3 supports a position slightly rearward from the central portion in the length direction on the rear connection portion 13 of the subframes 12, 12 so as to be tiltable (support portion 8). In the first embodiment, the support portion 8 is configured such that the brackets 82 and 82 provided on the lower surfaces of the inclined frames 3 and 3 are respectively supported by the brackets 81 and 81 provided on the rear connection portion 13 of the subframe 12. It is pivotally attached at 83. The inclined frames 3 and 3 of the first embodiment are stored in a horizontal position on the chassis frames 11 and 11 (subframe 12) as shown in FIG. 1, and a support portion 8 as shown in FIG. The support leg 34 can be tilted with respect to the rearward tilting posture after being grounded.

  The loading platform 4 has two left and right bottom frames 42, 42 on the lower surface of the vehicle mounting platform 41. Grounding rollers 43 are attached to the lower surfaces of the rear end portions of the bottom frames 42, 42, respectively. Further, a turn plate 44 is attached to the rear end portion of the loading platform 4 so as to be raised and lowered. The loading platform 4 can be moved in the vehicle front-rear direction with respect to the inclined frames 3 and 3 via a moving body 6 described later.

  The tilting device 5 is attached to the guide rail 2, one telescopic cylinder 51, and the tube 52 of the telescopic cylinder 51 and moves along the inward guide grooves 24 and 24 of the guide rails 2 and 2. Each roller 55 is composed of 55 and 55.

  As shown in FIGS. 2 and 4, the tube 52 of the telescopic cylinder 51 is provided with a shaft that protrudes left and right outwards at the front end portion and the rear end portion, and a pair of left and right is provided at the tip portion of each shaft. Two sets of front and rear rollers (front rollers 57, 57 and rear rollers 58, 58) are provided. The telescopic cylinder 51 has a bracket 36 (see FIGS. 2 and 4) in which the tip of the cylinder rod 53 is provided at the front end of each of the inclined frames 3 and 3 with the cylinder rod 53 facing the front side. ) With a support shaft 35 (see FIG. 2), and two sets of front and rear rollers 57, 57, 58, 58 provided at front and rear ends of the cylinder tube 52 are respectively connected to the left and right inclined frames 3, 3. It is attached so as to roll along the inward guide grooves 31, 31. Accordingly, when the telescopic cylinder 51 is expanded and contracted, the cylinder tube 52 side moves with respect to the inclined frame 3, and the front and rear, left and right (total four) rollers 57, 57, 58, 58 are respectively connected to the inclined frames 3, 3 respectively. Therefore, the telescopic cylinder 51 extends and contracts while maintaining a parallel posture with respect to the inclined frame 3 in a side view.

  A pair of left and right rollers 55 and 55 that are a part of the tilting device 5 are attached to the lower end portions of the short downward arms 54 and 54 at positions close to the front portion of the cylinder tube 52 in an outward state, respectively. The rails 2 and 2 are fitted into the inward guide grooves 24 and 24. When the telescopic cylinder 51 expands and contracts, the rollers 55 and 55 move back and forth along the inward guide grooves 24 and 24 of the guide rails 2 and 2, respectively. 3 and 3 are tilted about the support portion 8.

  Further, each guide rail 2, 2 has a length that can guide the entire movement range of each roller 55, 55 that moves in the entire expansion / contraction range of the expansion / contraction cylinder 51. The rollers 55 and 55 do not come off the guide rails 2 and 2. That is, the roller 55 is continuously guided with respect to the guide rail 2 in the entire expansion / contraction range from the fully contracted state of the telescopic cylinder 51 shown in FIG. 1 to the fully extended state of the telescopic cylinder 51 shown in FIG. Therefore, the roller 55 does not come off the guide rail 2 in the entire movement range of the roller 55.

  Also, rollers 59, 59 are attached to the outer surfaces of the downward arms 54, 54 as shown in FIGS. The rollers 59 and 59 are fitted into the inward guide grooves 31 and 31 of the left and right inclined frames 3 and 3, similarly to the rollers 57 and 58 attached to the front and rear of the cylinder tube 52.

  The loading platform 4 is installed on each of the inclined frames 3 and 3 so that the double speed device A can move back and forth by an amount twice as large as the expansion / contraction amount of the expansion / contraction cylinder 51. This double speed device A is configured to have a moving body 6 and left and right chains 7,7.

  The moving body 6 connects the left and right frames 61, 61 with a connecting plate 62, and has two rollers 63, 63,. The rollers 63, 63... On the left and right sides of the moving body 6 are fitted in the outward guide grooves 32, 32 of the inclined frames 3, 3, respectively, so that the moving body 6 extends along the inclined frames 3, 3. Can move back and forth. The moving body 6 moves back and forth while maintaining a parallel posture with respect to the inclined frames 3 and 3 in a side view.

  Each of the left and right chains 7, 7 has a first divided chain 71 and a second divided chain 72 that are divided into two as shown in FIGS. In other embodiments, the chain 7 may be a single endless one. In another embodiment, a wire may be used in place of the chain 7.

  In this embodiment, the chains 7 and 7 are attached as follows. First, at the front end portion and the rear end portion of the tube 52 of the telescopic cylinder 51, chain pulleys (total of four) 56, 56,. In this embodiment, the pulleys 56, 56,... Are coaxially installed inside the two front and rear rollers 57, 57, 58, 58, respectively. As shown in FIGS. 3 and 4, each first divided chain 71, 71 is wound around each rear pulley 56, 56 and is connected to the front end of each first divided chain 71, 71. While fixing the part to the connecting plate 62 of the moving body 6, the rear end portions of the first divided chains 71 and 71 are fixed to the connecting material 33 on the inclined frames 3 and 3 side. Each of the other second divided chains 72 and 72 is fixed to the connecting plate 62 of the moving body 6 with the front end of each of the second divided chains 72 and 72 being wound around the front pulleys 56 and 56. On the other hand, the rear ends of the second divided chains 72 and 72 are fixed to the connecting members 33 on the inclined frames 3 and 3 side.

  The loading platform 4 is pivotally attached to the moving body 6 at one point by a support shaft (two left and right on the same axis) 64 at a position near the front end of the loading platform. That is, in FIGS. 3 and 4, the shaft holes 64a formed in the left and right frames 61, 61 of the movable body 6 and the shaft holes 64b formed near the front end portions of the left and right bottom frames 42, 42 of the loading platform 4, respectively. By inserting the shaft 64 (see FIGS. 1, 2, and 5), the loading platform 4 is pivotally attached to the moving body 6 at one point in a side view.

  When the expansion / contraction cylinder 51 expands / contracts, the double speed device A causes the movable body 6 to adjust the expansion / contraction amount of the expansion / contraction cylinder 51 by the front and rear pulleys 56 and 56 and the chain 7 (first divided chain 71 and second divided chain 72). The carriage 4 is moved back and forth by a length twice as long, so that the loading platform 4 is also moved back and forth by the length of twice the expansion / contraction amount of the telescopic cylinder 51 together with the moving body 6.

  When the telescopic cylinder 51 is extended from the retracted position shown in FIG. 1, the loading platform 4 passes through the inclined state (loading platform tilt angle is about 10 °) where the grounding roller 43 at the rear end of the loading platform shown in FIG. As shown in FIG. 7, the loading platform 4 is lowered to a substantially horizontal position near the ground. The substantially horizontal position in the vicinity of the ground includes a state in which the loading platform 4 is grounded at a very gentle inclination angle (for example, about 3 to 4 °).

  As shown in FIG. 6, when the grounding roller 43 at the rear end of the loading platform is in contact with the loading platform, the loading platform 4 has a general inclination angle (about 10 °) at which a general high vehicle can be loaded. Sometimes this can be done in the state of FIG. In addition, in the state of this FIG. 6, the back protrusion length of the loading platform 4 becomes short, and becomes effective in the place where the front and back work spaces are narrow.

  In addition, as shown in FIG. 7, when the loading platform 4 is lowered to a substantially horizontal position near the ground, it has a gentle inclination angle (about 3 to 4 °) at which a low vehicle such as a sports car can be loaded. 7 is carried out in the state shown in FIG. In the state of FIG. 7, although the inclination angle of the loading platform 4 can be extremely relaxed, the rear projecting length of the loading platform 4 is increased, and therefore, it is suitable for work in a place where a sufficient working space can be provided before and after. In addition, in the gentle inclination angle state of FIG. 7, it is a matter of course that ordinary vehicles can also be loaded.

  Next, an operation method of the vehicle transport vehicle of the first embodiment will be described.

  1, the telescopic cylinder 51 is fully contracted, the roller 55 of the downward arm 54 is in a position closer to the front portion of the guide rail 2 (in front of the upward inclined portion 21), and the inclined frame 3 is in a horizontal posture. In addition, the loading platform 4 also maintains a horizontal posture at the foremost position. When the loading platform 4 is in the retracted posture state, the positions near the front end portions of the loading platform bottom frames 42, 42 are supported by the movable body 6 by the support shaft 64, while the upper surfaces of the rear end portions of the sub frames 12, 12 are supported. The lower surfaces of the cargo bed bottom frames 42 and 42 are slidably mounted on the sliding plates 14 and 14.

  In order to operate the loading platform 4 to the vehicle loading posture, the telescopic cylinder 51 is extended. Then, the cylinder tube 52 moves rearward, and rollers (a pair of left and right) 55 attached to the downward arm 54 move to the horizontal portion 22 through the upward inclined portion 21 of the guide rail 2 to tilt the inclined frame 3. At the same time, the loading platform 4 is moved backward by twice the extension amount of the telescopic cylinder by the double speed device A, and the grounding roller 43 at the rear end of the loading platform contacts the ground. Thereafter, when the cover plate 44 is laid down and brought into contact with the ground, the general vehicle S can be loaded as shown in FIG.

  Further, in order to further gently tilt the loading platform 4 from the state shown in FIG. Then, as shown in FIG. 7, when the roller 55 of the downward arm 54 moves rearward along the guide rail 2, and when the roller 55 reaches the end of the downward inclined portion 23 through the horizontal portion 22 of the guide rail 2. Thus, the support leg 34 of the inclined frame 3 comes into contact with the ground, and the moving body 6 reaches the vicinity of the rear end of the inclined frame 3 in accordance with this, so that the loading platform 4 further moves backward (the ground roller 43 rolls on the ground). ). At this time, the front part of the loading platform 4 is located near the rear end of the inclined frame 3 and the inclination angle of the loading platform 4 is smaller than the inclination angle of the inclined frame 3. Since the body 6) can be tilted around a point at the front end of the loading platform (the position of the support shaft 64), the front of the loading platform 4 can be moved to the rear end of the tilting frame 3 without any trouble. be able to.

  In the state of FIG. 7, the loading platform 4 is lowered to a substantially horizontal position near the ground, and the loading platform 4 is stable at a very gentle inclination angle (for example, about 3 to 4 °). In addition, in the state where the load platform is gently inclined in FIG. 7, a general vehicle is naturally used, but even a low vehicle can be loaded without any problem.

  Further, the telescopic cylinder 51 can be extended steplessly from the first-stage extended state in FIG. 6 to the final extended state in FIG. 7, and is set to a loading platform inclination angle corresponding to the vehicle height of the transported vehicle S. Or, the rear protrusion length of the loading platform 4 can be set according to the work space and the terrain.

  In order to store the loading platform 4 from the vehicle loaded state, the telescopic cylinder 51 can be reduced.

  In the vehicle transport vehicle of the first embodiment, as described above, the tilting frame 3 can be tilted and the loading platform 4 can be moved back and forth simultaneously with one telescopic cylinder 51. Further, since the tilting device 5 of the tilting frame 3 is composed of the guide rail 2, the telescopic cylinder 51, and the roller 55 attached to the cylinder tube 52, the configuration of the tilting device 5 becomes simple (the number of parts is small, (Assembly becomes good) and light weight, and the whole can be manufactured at low cost.

  Further, when a guide rail type device is used as the tilting device, a configuration for tilting the tilting frame 3 smoothly (substantially at a constant speed) can be easily manufactured as compared with a link type device.

  Furthermore, since the loading platform 4 can be moved back and forth by using the double speed device A, the loading platform 4 can be moved by an amount twice the expansion / contraction amount of the expansion / contraction cylinder 51. A sufficient amount of bed movement for lowering to a lower level can be secured.

[Second Embodiment of FIGS. 8 to 10]
The vehicle transport vehicle of the second embodiment shown in FIGS. 8 to 10 is configured such that the rear end portion (support leg 34) of the inclined frame 3 can be grounded as soon as possible when the loading platform 4 is moved backward and tilted. It is.

  The vehicle transport vehicle of the second embodiment is a modification of the support portion 8 of the tilt frame 3 in the first embodiment, and the tilt frame is provided at the rear end portion of the subframe 12 as the support portion 8 of the tilt frame 3. 3 is provided so as to support 3 in a freely movable manner. In the second embodiment, another telescopic cylinder 9 for moving the inclined frame 3 back and forth is installed between the rear end of the chassis frame 11 and the inclined frame 3. In addition, since the other structure in 2nd Example of FIGS. 8-10 is the same as that of the said 1st Example (FIGS. 1-7), description of this 1st Example is used.

  In the vehicle transport vehicle of the second embodiment, the inclined frame 3 is placed on the roller 84 at the rear end portion (supporting portion 8) of the subframe 12, and the inclined frame 3 is dedicated to the subframe 12. The telescopic cylinder 9 can be moved back and forth within a predetermined length range. Then, by moving the tilt frame 3 back and forth with the telescopic cylinder 9, the tilt center position of the tilt frame 3 (portion supported by the roller 84 of the support portion 8) can be moved back and forth. That is, when the telescopic cylinder 9 dedicated to the forward / backward movement of the tilt frame is extended from the loading platform retracted state of FIG. 8, the tilt frame 3 moves backward by the extension amount, and at that time, the tilt frame 3 is supported by the support portion 8 (roller 84). The supported position is displaced toward the front side of the inclined frame 3 by the length of the rearward movement. At this time, the distance from the support part 8 of the inclination frame 3 to the rear end (support leg 34) of the inclination frame becomes long.

Then, when the main telescopic cylinder 51 is extended with the support position of the tilt frame 3 moved rearward as described above, the tilt frame 3 tilts backward with the support portion 8 as the center, As shown in FIG. 10, the support legs 34 are grounded. However, the time until the support legs 34 are grounded is shortened by the movement of the inclined frame 3 to the rear side. That is, the tilt angle until the support frame 34 comes into contact with the inclined frame 3 from the horizontal posture is smaller than that in the case of FIG. 7 (first embodiment), and accordingly, the time until the support leg 34 contacts the ground is reduced accordingly. Become.

  Incidentally, when the telescopic cylinder 51 is extended from the loading platform retracted state, the loading applied to the rear side of the inclined frame 3 is gradually increased by the backward movement of the loading platform 4, and the support legs 34 of the inclined frame 3 are Until contact is made, the load (lifting force) on the roller 55 fitted to the guide rail 2 gradually increases. Thus, the load applied to the roller 55 is preferably as short as possible and as small as possible. Note that when the support leg 34 is grounded, the load applied to the inclined frame 3 can be received by the support leg 4 and the support portion 8, so that the load on the roller 55 is hardly applied.

  In the second embodiment, when the telescopic cylinder 51 is extended in a state where the inclined frame 3 is shifted rearward with respect to the support portion 8 as described above, the support leg 34 is more than that of the first embodiment. Since the contact is made quickly, the load time applied to the roller 55 can be shortened, and the load on the roller 55 can be reduced.

It is a side view of the loading platform storage state in the vehicle transport vehicle of 1st Example of this application. FIG. 2 is a partially enlarged plan view of the vehicle transport vehicle of FIG. 1. It is an exploded view of the vehicle transport vehicle of FIG. It is a partial perspective view in the decomposition | disassembly state of FIG. It is VV expanded sectional drawing of FIG. FIG. 2 is a side view of the vehicle carrier normal inclination angle state in the vehicle transport vehicle of FIG. 1. FIG. 2 is a side view of the vehicle carrier in FIG. It is a side view of the loading platform storage state in the vehicle transport vehicle of 2nd Example of this application. It is an exploded view of the vehicle transport vehicle of FIG. FIG. 9 is a side view of the vehicle carrier of FIG. It is explanatory drawing of a well-known vehicle transport vehicle. It is a partially expanded perspective view in the vehicle transport vehicle of FIG.

1 is a vehicle (carrier vehicle), 2 is a guide rail, 3 is an inclined frame, 4 is a loading platform, 5 is a tilting device, 6 is a moving body, 7 is a chain, 8 is a support, 11 is a chassis frame, and 12 is a subframe. , 51 is a telescopic cylinder, 52 is a cylinder tube, 53 is a cylinder rod, 54 is a downward arm, 55 is a roller, 56 is a pulley, and A is a double speed device.

Claims (1)

A vehicle (1) having a chassis frame (11), an inclined frame (3) supported to be tiltable at a rear end position of the chassis frame (11), and a vehicle longitudinal direction on the inclined frame (3) A load carrier (4) supported movably, and provided between the inclined frame (3) and the load carrier (4), the load carrier (4) is moved in the vehicle longitudinal direction with respect to the inclined frame (3). And a tilting device (5) having a single telescopic cylinder (51) to be tilted and capable of tilting the tilting frame (3) by the telescopic motion of the telescopic cylinder (51). And
The tilting device (5) is attached to a guide rail (2) attached to a chassis frame (11), the telescopic cylinder (51), and a tube (52) of the telescopic cylinder (51). (2) along constructed out rollers (55) move,
The guide rail (2) has a length capable of guiding the entire movement range of the roller (55) moving in the entire expansion / contraction range of the expansion / contraction cylinder (51),
A double speed device (A) capable of moving the loading platform (4) back and forth between the inclined frame (3) and the loading platform (4) by an amount twice as much as the expansion / contraction amount of the expansion cylinder (51). the setting,
The chain (7) or wire is used for the double speed device (A),
In a state where the chain (7) or the wire is wound around a pulley (56, 56) attached to the tube (52) of the telescopic cylinder (51), the chain (7) or the wire is connected to the loading platform (4) and the wire. While being fixed to the inclined frame (3),
A cylinder rod (53) of the telescopic cylinder (51) is connected to the inclined frame (3), and a tube (52) of the telescopic cylinder (51) is movably supported along the inclined frame (3). Then, by the extension movement of the telescopic cylinder (51), the tilting device (5) performs the backward tilting operation of the tilting frame (3) and the rearward movement of the loading platform (4) at the same time, so that the loading platform (4) is moved. It can be lowered to a substantially horizontal position near the ground,
A vehicle carrier characterized by that.

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