JP2006103592A - Body loading and unloading vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a structure with a low height over the ground applicable to any type of vehicle and allowing each body to be embodied in a body loading/unloading vehicle. <P>SOLUTION: A tilting cylinder 4 to tilt a tilting frame 2 is installed in a space under the tilting frame 2 ranging out to the back of a vehicle body frame 1f. The space has existed in a conventional body loading/unloading vehicle irrespective of the vehicle model, that is, has been a dead space. Because the tilting frame 2 does not lie between the vehicle body frame 1f and the tilting frame 2 in the vertical direction owing to installation of the tilting cylinder 4 through utilization of such a dead space, the vehicle body frame 1f and the tilting frame 2 can be installed closely to each other as much as possible, and it is possible to suppress the height over the ground of a body 3 to be placed on the tilting cylinder 4. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a body loading / unloading vehicle capable of loading / unloading a loading body between a vehicle body and the ground.

  The body loading / unloading vehicle can load / unload, for example, a “body” as a container on which one passenger car is placed between the vehicle body and the ground. The vehicle includes a tilt frame that can be tilted with respect to the body frame, tilt means (cylinder, arm, and the like) that tilts the tilt frame, and a body that slides back and forth on the tilt frame (for example, Patent Document 1). reference.). The tilt means is provided between the vehicle body frame and the tilt frame disposed thereon, and when the cylinder is extended, the arm rotates to tilt the tilt frame upward.

  As another body loading / unloading vehicle, there is a vehicle in which a cylinder for tilting a tilt frame is disposed below the body frame (see, for example, Patent Document 2). In this configuration, the cylinder is at an intermediate position of the vehicle body frame in the vehicle width direction, and rotates back and forth in accordance with the expansion / contraction operation. When viewed from the side, the piston of the cylinder that has been extended extends upward so as to penetrate the body frame.

JP 2000-108768 A (3rd to 5th pages, FIG. 1) JP 2001-138793 A (pages 3 to 5, FIGS. 1 and 3)

In the conventional body loading and unloading vehicle described in Patent Document 1, the cylinder and the arm are located between the body frame and the tilt frame, and thus are bulky in the vertical direction. Therefore, the ground clearance of the body is increased correspondingly, and it becomes difficult to obtain excellent running stability.
On the other hand, in the conventional body loading / unloading vehicle described in Patent Document 2, since the cylinder is disposed below the body frame, the problem of being bulky in the vertical direction is solved. However, in order to rotate the cylinder back and forth, it is necessary to secure a rotation allowable space in the vehicle body frame, which is difficult depending on the vehicle type. Therefore, the types of vehicles that can employ such a configuration are limited.
In view of the conventional problems as described above, it is an object of the present invention to provide a low ground height structure of a body in which applicable vehicle types are not limited in a body loading / unloading vehicle.

The body loading / unloading vehicle of the present invention is attached to the vehicle body frame so as to be tiltable around a vehicle body having a vehicle body frame and a tilting shaft provided at a rear portion of the vehicle body frame with the vehicle width direction as an axial direction. A tilt frame having a driven portion at a portion protruding rearward from the body frame, a loading body capable of being loaded onto and unloaded from the tilt frame, and a rear end of the body frame below one end of the tilt shaft, The other end is supported by the driven part, and includes a tilt cylinder that drives the tilt frame around the tilting axis by extending and contracting.
In the body loading / unloading vehicle configured as described above, the tilt cylinder is disposed in a lower space of the tilt frame protruding rearward from the body frame. The space was originally a dead space that existed in a body loading / unloading vehicle regardless of the vehicle type, but was not utilized. By arranging the tilt cylinder using such dead space, there is no tilt cylinder between the body frame and the tilt frame in the height direction, so the body frame and the tilt frame are as close as possible to each other. The ground height of the body placed on the tilt cylinder can be kept low.

The body loading / unloading vehicle may include a slide mechanism that slides the body back and forth with respect to the tilt frame, and a motor that is a driving source thereof may be provided in the driven portion.
In this case, the presence of the motor does not cause the ground height of the tilt frame to increase. Therefore, also in this respect, the body can be made to have a low ground clearance.

Further, in the body loading / unloading vehicle, the driven portion may be configured such that the tilt frame side support member is integrally provided on the tilt frame main body, and the motor is attached to the tilt frame side support member. Good.
In this case, the tilt frame side support member is used not only as a tilt cylinder but also as a motor mounting member. Therefore, the number of members can be reduced correspondingly, and an inexpensive structure can be obtained.

In the body loading / unloading vehicle, a body frame side support member is attached to the rear of the rearmost cross member of the chassis frame of the body frame, and one end of the tilt cylinder is pivotally attached to the body frame side support member. Good.
In this case, since the vehicle body frame side support member is behind the cross member at the rearmost part of the chassis frame, the cross member does not interfere with the mounting of the tilt cylinder, and the mounting is easy.

In the body loading / unloading vehicle, a reinforcing member that extends in the vehicle width direction may be provided on the body frame side support member.
In this case, the reinforcing member not only reinforces the vehicle body frame side support member, but also serves as a cover for preventing muddy water or the like splashed from the tire during traveling from adhering to the tilt cylinder. Therefore, it is an inexpensive structure in that it is not necessary to separately provide a mudguard cover.

  According to the body loading / unloading vehicle of the present invention, the tilt cylinder is disposed in a lower space of the tilt frame that protrudes rearward from the vehicle body frame (which is present regardless of the vehicle type), and in the height direction. In this case, since the tilt cylinder is not interposed between the vehicle body frame and the tilt frame, the vehicle body frame and the tilt frame can be arranged as close as possible to each other, and the ground height of the body mounted on the tilt cylinder can be lowered. Can be suppressed. In this way, it is possible to provide a low ground height structure of the body in which applicable vehicle types are not limited.

  FIG. 1 is a side view of a body loading / unloading vehicle according to an embodiment of the present invention. In the figure, a body loading / unloading vehicle includes a vehicle body 1 having a body frame 1f, a tilt frame 2 attached to be tiltable with respect to the body frame 1f, and a load for loading / unloading the tilt frame 2 (for example, an automobile). A body 3 for loading) and a double-acting tilt cylinder 4 for driving the tilt frame 2. The tilt frame 2 in this state is a substantially horizontal state that is not tilted. The body 3 is in a predetermined loading position.

  FIG. 2 is an enlarged side view of the vehicle body frame 1f, the tilt frame 2 and the body 3. As shown in FIG. FIG. 3 is a plan view (the outer shape of the body is indicated by a two-dot chain line). In FIG. 2 (see also FIG. 3), the tilt frame 2 is attached to be tiltable with respect to the vehicle body frame 1f around a tilt shaft 5 provided at the rear portion of the vehicle body frame 1f with the vehicle width direction as an axial direction. It has been. Further, the rear portion of the tilt frame 2 protrudes rearward from the vehicle body frame 1f, and a driven portion 2A as a portion to which a driving force for tilting is applied is present at the protruding portion. Therefore, the driven portion 2A is located behind the tilting shaft 5. The driven portion 2 </ b> A is obtained by integrally attaching a support member 202 (tilt frame side support member) to the main body portion 201 of the tilt frame 2. A pair of support members 202 are provided in the vehicle width direction (see FIG. 3), and these are integrated with each other by a connecting pipe 203. A guide roller 230 that guides the body 3 is rotatably attached to the upper part in the vicinity of both ends of the connection pipe 203.

  In the state shown in FIG. 2, the body 3 includes a substantially horizontal loading platform 301, a front plate 302 fixed to the loading platform 301, and a retractable rear plate 303. The rear plate 303 can be tilted 90 degrees to the right from the position shown in the figure with the lower end as the center when loading and unloading the luggage on the body 3. The body 3 can slide back and forth on the tilt frame 2, and a ground roller 304 is provided in the vicinity of the rear end of the lower portion.

  A support member 101 (vehicle body frame side support member) is integrally attached to the vehicle body frame 1f at the rear end portion of the vehicle body frame 1f. 19 is a cross-sectional view taken along the line XIX-XIX in FIG. 3 and 19, a support member 101 (generic name) is an aggregate of support members 101 a and 101 b provided in a pair of left and right symmetry, and these are integrated with each other by a connecting pipe 103. Further, in order to reinforce the pair of inner support members 101a, a plate-like reinforcement member 102a (FIG. 19) extending in the vehicle width direction is welded to the front side thereof, and further, the pair of outer support members 101b. Reinforcing members 102b are also welded to the outer side of each. The reinforcing member 102a not only reinforces the supporting member 101a, but also serves as a cover for preventing muddy water and the like splashed from the tire 1t (FIG. 1) during traveling from adhering to the tilt cylinder 4. Therefore, it is an inexpensive structure in that it is not necessary to separately provide a cover exclusively for mudguards.

  The support member 101 is attached to the rear of the rearmost cross member 1fc of the vehicle body frame 1f shown in FIG. Therefore, when the tilt cylinder 4 is attached, the cross member 1fc does not get in the way, and the attachment is easy. In FIG. 2, one end of the tilt cylinder 4 (here, the cylinder side end portion) is pivotally attached to and supported by a support member 101 by a pin 6. The position of the pin 6 in the height direction is below the tilt axis 5. The other end (here, the piston side end) of the tilt cylinder 4 is pivotally supported by and supported by the support member 202 by a pin 7. The tilt cylinder 4 extends and contracts to apply torque to the pin 7 around the tilt axis 5 to drive the tilt frame 2.

  On the other hand, link support portions 8 and 9 are fixed to the support member 101, and one end of the link member 11 is attached to the rear end of the rear link support portion 9 via a pin 10. The other end of the link member 11 is connected to a jack 13 via a pin 12. The jack 13 is rotatable about a pin 14 fixed to the tilt frame 2. A pair of left and right members are provided from the link support portion 8 to the jack 13. The left and right jacks 13 are horizontally attached with rear bumpers 15 extending in the vehicle width direction.

  FIG. 4 is a side view in which only the body frame 1f and the tilt frame 2 are further enlarged. For convenience of illustration, the left half and the right half are separated and displayed by a center line. In the figure, a main girder 201a made of a channel-shaped steel material that constitutes the main body 201 of the tilt frame 2 is arranged with the recess side facing the side surface, and a pair of slide rollers 16 are engaged with the side surface. . The stoppers 204 are attached to both ends of the main beam 201a to prevent the slide roller 16 from falling off. The slide roller 16 is rotatably attached to a substantially triangular roller support plate 17, and the roller support plate 17 is connected to a connecting member 19 through a pin 18 in a relatively rotatable state. ing. The connecting member 19 is formed by welding a support plate 19b having a shape shown in the figure to a square pipe 19a extending in the vehicle width direction. The support plates 19b are used in pairs with two gaps in the vehicle width direction, and a total of three sets are provided in the vehicle width direction.

  The side surface (right side surface) opposite to FIG. 4 has the same configuration. The body 3 (FIG. 2) is attached to the connecting member 19. With such a configuration, the body 3 can move back and forth while rolling the slide roller 16 along the main beam 201a. It is also possible for the body 3 to rotate relative to the roller support plate 17. Note that the slide roller 16 does not come off the tilt frame 2 by being engaged with the channel-shaped main beam 201a.

  6A is a more detailed plan view of the tilt frame 2 alone, and FIG. 6B is a cross-sectional view taken along line BB in FIG. In the figure, sprockets 205 and 206 are provided in the vicinity of the front and rear ends of the main body 201 of the tilt frame 2 that is long in the front and rear direction. The support member 202 is provided with four sprockets 208 to 211 in addition to the central driving sprocket 207. The drive sprocket 207 is rotationally driven by a slide motor 214. In addition to the slide motor 214, the sprockets 207 to 211 are attached to the support member 202. In this way, the support member 202 is used not only as the tilt cylinder 4 but also as a mounting member for the slide motor 214 and the sprockets 207 to 211. Therefore, the number of members can be reduced correspondingly, and an inexpensive structure can be obtained.

  Each of the sprockets 205 to 211 is provided in a duplex manner in the vehicle width direction, and two chains 212 are attached. At the center of the connecting member 19 in the vehicle width direction, another support plate 19b (one set of two sheets) having the same shape as the support plate 19b is welded to the same position as viewed from the side. A connection pin 213 that connects one end and the other end of the chain 212 in an endless manner is supported by the support plate 19b. The connection pin 213 is disposed coaxially with the pin 18 that supports the roller support plate 17 (FIG. 4).

  Each chain 212 is stretched in the order of sprockets 205, 208, 209, 207, 210, 211, 206 starting from the connection pin 213, and the end point is connected to the connection pin 213 again. That is, each chain 212 constitutes a closed loop in which a connection pin 213 is interposed in the middle.

Next, the arrangement of proximity sensors will be described.
FIG. 5 is a plan view corresponding to FIG. For convenience of illustration, the left half and the right half are separated and displayed by a center line. In FIG. 5, the connecting members 19 at three positions by moving in the front-rear direction are indicated by solid lines (in reality, one). FIG. 7A is an enlarged view of the portion A surrounded by a two-dot chain line circle in FIG. FIG. 7B is an enlarged view of the portion B in FIG. 4 corresponding to the side view of the portion A. 7A and 7B, a mounting plate 21 is attached to the roller support plate 17 on the port side of the connecting member 19, and a proximity sensor S1 is attached thereto. Accordingly, the proximity sensor S1 moves together with the slide roller 16. In addition, a dog 22 is attached to the tilt frame 2 so as to be close to and opposed to the proximity sensor S1. When the body 3 is in the loading position at the forward end, the proximity sensor S1 detects the dog 22.

  FIG. 7C is an enlarged view of the portion C in FIG. 5 when the connecting member 19 comes to the retracted end, and an enlarged view of the portion D in FIG. 4 corresponding to the side view of the portion C. (D) of FIG. 7 (c) and 7 (d), a dog 23 is attached to the tilt frame 2 so as to be close to the proximity sensor S1. When the body 3 is at the retracted end position, the proximity sensor S1 detects the dog 23. That is, the proximity sensor S1 is a sensor that detects that the body 3 is at the forward end or the backward end.

  Moreover, what expanded the EE sectional view in FIG. 5 is FIG.7 (e), and what expanded F part is FIG.7 (f). 7 (e) and 7 (f), a mounting plate 21 is attached to the roller support plate 17 on the starboard side of the connecting member 19, and a proximity sensor S2 is attached thereto. Accordingly, the proximity sensor S2 moves together with the slide roller 16. In addition, a dog 24 is attached to the main beam 201a of the tilt frame 2 so as to be close to the proximity sensor S2. When the body 3 is at a predetermined slide position and the proximity sensor S2 is at the positions shown in (e) and (f), the proximity sensor S2 detects the dog 24. That is, the proximity sensor S2 is a sensor that detects that the body 3 is at a predetermined slide position.

  FIG. 8G is an enlarged view of the G portion in FIG. 5, and FIG. 8H is an enlarged view of the HH line cross section corresponding to the side view of the G portion. In (g) and (h) of FIG. 8, the proximity sensor S4 is attached to the attachment plate 25 attached to the vehicle body frame 1f side. This proximity sensor S4 is in a position where it can be in close proximity to the main beam 201a of the tilt frame 2 in the landing state (non-tilting state). When the tilt frame 2 is in the landing state, the proximity sensor S4 detects the main beam 201a. That is, the proximity sensor S4 is a sensor that detects that the tilt frame 2 is in the landing state.

  Further, FIG. 8 (i) is an enlarged view of the portion I in FIG. 5, and FIG. 8 (j) is an enlarged view taken along the arrow J corresponding to the side view of the portion I. In (i) and (j) of FIG. 8, the proximity sensor S3 is attached to the attachment plate 26 attached to the vehicle body frame 1f side. This proximity sensor S3 is in a position where it can be in close proximity to the main beam 201a of the tilt frame 2 within the range from the landing state to the predetermined tilt state. When the tilt frame 2 is within the above range, the proximity sensor S4 detects the main beam 201a. If the tilt frame 2 tilts beyond this range, the proximity sensor S3 cannot detect the main beam 201a. That is, the proximity sensor S3 is a sensor that detects whether or not the tilt frame 2 is within a range from the landing state to a predetermined tilt state. In other words, the signal output is switched from on to off during tilting. The time is when a predetermined tilt state is reached.

  Next, the hydraulic circuit will be described with reference to FIG. The hydraulic circuit includes a tank 30, a hydraulic pump 31, a relief pressure selection solenoid valve 32, a slide motor solenoid valve 33, a tilt cylinder solenoid valve 34, 35, 36, a shuttle valve 37, a counter balance valve 38, a slide motor 214, The pin brake 39, the filter 40, the pressure control valves 41 to 44, and the check valves 45 to 48 are connected as shown in the figure. The tilt cylinder solenoid valve 34 incorporates a pair of throttle valves 34a and 34b at the neutral position of the valve. Similarly, the relief pressure selection solenoid valve 32 and the slide motor solenoid valve 33 incorporate a pair of throttle valves in the neutral position.

  The relief pressure selection solenoid valve 32 is connected to the pressure control valves 41 and 43 having a high set pressure in the non-excited state and to the pressure control valve 42 having a low set pressure in the excited state, respectively, so that the relief pressure can be selected. Normally, it is in a non-excited state (high relief pressure), and is brought into an excited state (low relief pressure) only when the inclined body 3 slides backward. The slide motor solenoid valve 33 is a three-position solenoid valve having two operation positions corresponding to the forward and reverse rotation directions of the slide motor 214, and rotates or reverses the slide motor 214 in the excited state. The tilt cylinder solenoid valve 34 is a three-position solenoid valve having two operation positions corresponding to the forward and backward tilting of the tilt cylinder 4. In the excited state, the tilt cylinder 4 is returned from the tilted or tilted state. The tilt cylinder solenoid valves 35 and 36 seal or open the back pressure side of the tilt cylinder 4 according to the operation. When the hydraulic pressure is supplied to the slide motor 214, the pin brake 39 contracts to unlock the rotation shaft of the slide motor 214, and when the hydraulic pressure is released, the pin brake 39 extends to lock the rotation shaft of the slide motor 214.

  Next, an electric circuit will be described with reference to FIG. In FIG. 10, the core of control is a programmable logic controller (hereinafter referred to as PLC) 50, to which output signals from the proximity sensors S1 to S4 are input. A command signal “loading” or “unloading” is input from the toggle switch 51. The operation of “loading” or “unloading” can be performed from a radio transmitter (not shown) in addition to the toggle switch 51. In this case, “loading” or “unloading” is performed from the receiver 52 that has received the transmitted signal. The signal is input to the PLC 50. The power of the PLC 50 is supplied from the battery 53 (DC 24 V) via the fuse 54, and the power is supplied to the receiver 52 via the PLC 50.

  On the other hand, the solenoids of the above-described solenoid valves 32 to 36 are connected to the output port of the PLC 50, and excitation / de-excitation thereof is controlled by the PLC 50. The PLC 50 also has a function of the electronic governor controller 50a, and controls the electronic governor 56 connected via the connector 55, and controls the engine speed during the unloading operation to an appropriate value.

  FIG. 11A is a side view showing the main part related to the tilting operation of the tilt frame 2. In the body loading / unloading vehicle configured as described above, the tilt cylinder 4 is disposed in a lower space of the tilt frame 2 protruding rearward from the body frame 1f. The space was originally a dead space that existed in a body loading / unloading vehicle regardless of the type of vehicle, but was not utilized. By arranging the tilt cylinder using such a dead space, it is not necessary to separately provide a space dedicated to the tilt cylinder, and accordingly, the vehicle dimensions can be made compact. In particular, since the tilt cylinder 4 is not interposed between the vehicle body frame 1f and the tilt frame 2 in the height direction, the vehicle body frame 1f and the tilt frame 2 can be arranged as close to each other as possible. The ground clearance of the body 3 placed on the vehicle 2 can be kept low. In this way, it is possible to provide a low ground height structure of the body in which applicable vehicle types are not limited.

  Further, the slide motor 214 is also attached to the support member 202, so that the presence of the slide motor 214 does not become a factor for increasing the ground height of the tilt frame 2. Therefore, also in this respect, the body 3 can be set to a low ground clearance.

  When the tilt cylinder 4 is contracted from the state in which the tilt frame 2 is substantially horizontal (a), the driven portion 2A is drawn through the pin 7, and the tilt frame 2 is rotated in the clockwise direction around the tilt shaft 5. Torque is applied. As a result, the tilt frame 2 tilts, and the state (b) is obtained. As the tilt frame 2 tilts, the link member 11 rotates clockwise about the pin 10. At this time, the distance between the pin 10 and the pin 14 is reduced, so that the pin 12 is pushed backward by the link member 11. As a result, the jack 13 rotates clockwise about the pin 14. When the tilt frame 2 further tilts from the state (b), the jack 13 further rotates in the clockwise direction.

  Next, the body frame 1f described above will be supplementarily described with reference to FIG. In the figure, the body frame 1f is composed of a chassis frame 1f1 that is inseparable from the vehicle body and a subframe 1f2 attached to the chassis frame 1f2. In the above description, the “body frame 1f” is actually the subframe 1f2. As shown in the drawing, each part shown in FIG. 2 in addition to the support member 101 forms one unit 100 with respect to the sub-frame 1f before attachment. When the unit 100 is attached to the chassis frame 1f1, the support member 101 is located behind the last cross member 1fx of the chassis frame 1f1. Therefore, when attaching the unit 100 to the chassis frame 1f1, it is not necessary to remove the tilt cylinder 4 and the like, so that the mounting is easy. If the cross member 1fx is interposed between the support members 101 and 202 in the state where the mounting is completed, the tilt cylinder 4 or the like interferes with the cross member 1fx to mount the unit 100 while it is mounted. I can't dress. Therefore, there is an inconvenience that the tilt cylinder 4 or the like must be attached after the tilt cylinder 4 or the like is temporarily removed and the sub-frame 1f2 is fixed to the chassis frame 1f1.

  Next, an operation of lowering the body in a state where it is loaded at a predetermined position as shown in FIG. 1 will be described. 12 and 13 are flowcharts of processing executed by the PLC 50 when the body is lowered. For convenience of illustration, it is divided into two sheets, but the symbols A, B, and C surrounded by a circle at the lower end of FIG. 12 are connected to the same symbols at the upper end of FIG. 13, and two flowcharts represent one flowchart. ing.

  When the process of this flowchart is started, in step ST1 of FIG. 12, the PLC 50 waits for the lowering switch to be turned on ("down" operation of the toggle switch 51 or "down" signal from the receiver 52). . Here, if the lowering switch is turned on, the PLC 50 proceeds to step ST2, and whether or not the loading switch is turned on ("loading" operation of the toggle switch 51 or "loading" signal from the receiver 52). Judging. Here, the loading switch is originally off, and the process proceeds to step ST3. If the loading switch is turned on in step ST2, "unloading" and "loading" are simultaneously turned on, and this is a state to be erroneously operated. Therefore, the process returns to step ST1, and step ST3. Don't go on.

  Subsequently, in step ST3, the PLC 50 determines whether or not the proximity sensor S4 is on, that is, whether the tilt frame 2 is in the landing state. If it is on, the process proceeds to step ST4, and if it is off, the process proceeds to step ST12. Since it is on here, it is determined whether or not the proximity sensor S2 is on in step ST4. At this time, the proximity sensor S2 that detects that the body 3 is at the predetermined slide position is off. Therefore, the PLC 50 proceeds to step ST5 and excites the slide motor electromagnetic valve 33 to rotate the slide motor 214 in the downward direction. . Here, the downward direction is the direction in which the body 3 moves backward. Thus, the body 3 retracts to the position shown in FIG. When the proximity sensor S2 is turned on by the retreat (step ST6), the PLC 50 puts the slide motor electromagnetic valve 33 into a non-excited state and stops the slide motor 214 (step ST7).

  Next, the PLC 50 excites the tilt cylinder electromagnetic valve 35 in step ST8 and further excites the tilt cylinder electromagnetic valve 34 in step ST9 to cause the tilt cylinder 4 to contract. As a result, the tilt frame 2 tilts. This tilting is performed until the proximity sensor S3 is turned off (step ST10). When the tilt frame 2 is in the state shown in FIG. 16B and the proximity sensor S3 is turned off, the PLC 50 The contraction operation is stopped (step ST11), and the tilt cylinder solenoid valve 35 is brought into a non-excited state in step ST14 of FIG.

  Next, the PLC 50 excites the slide motor solenoid valve 33 and rotates the slide motor 214 in the downward direction (step ST15). As a result, the body 3 moves backward and the ground roller 304 is grounded (FIG. 16C). Thereafter, the body 3 moves backward until the proximity sensor S1 is turned on while the ground roller 304 is grounded (step ST16). When reaching the state shown in FIG. 17D and the proximity sensor S1 is turned on, the PLC 50 Stops the slide motor 214 (step ST17).

  Next, the PLC 50 excites the tilt cylinder solenoid valve 35. However, the tilt cylinder solenoid valve 34 is not excited, and the valve is in a neutral position. As a result, hydraulic oil can be fed into the rod side of the tilt cylinder 4 via the throttle valve 34 b at the neutral position of the tilt cylinder solenoid valve 34 and the check valve in the tilt cylinder solenoid valve 36. In addition, an oil passage connected to the tank 30 or the throttle valve 34b is formed from the bottom side of the tilt cylinder 4 through the excited tilt cylinder electromagnetic valve 35 and the throttle valve 34a. As a result, the hydraulic oil on the bottom side of the tilt cylinder 4 is sucked up to the rod side, and the excess or deficiency is returned to the tank 30 or sucked up from the tank 30, so that the tilt cylinder 4 is contracted while being decelerated by the throttle valves 34a and 34b. It will be in a state where it can operate.

  In this state, the weight of the body 3 and the load of the load generate torque that further tilts the tilt frame 2, that is, a force that contracts the tilt cylinder 4, and the tilt cylinder 4 naturally contracts. By this contraction operation, the tilt frame 2 is further tilted, and the rear end thereof is grounded ((e) of FIG. 17). The contraction operation of the tilt cylinder 4 naturally stops due to the grounding. The PLC 50 waits for the lowering switch to be turned off (step ST19), and when turned off, returns the tilt cylinder solenoid valve 35 to the non-excited state (step ST20), and ends the processing of the flowchart. Thereafter, the operator falls the rear plate 303 rearward and carries the load.

  When the above-described lowering operation is stopped halfway, it is necessary to skip a part of the operation when the lowering operation is started again. For example, when the horizontal retraction of the body 3 has already been completed at the start of the lowering operation (the state shown in FIG. 16A), the proximity sensor S4 is turned on in step ST3, and the proximity sensor S2 is turned on in step ST4. The PLC 50 skips steps ST5 to ST7 and executes step ST8 and subsequent steps. If the horizontal retraction of the body 3 has already been completed and a slight tilt has started at the start of the lowering operation (intermediate between (a) and (b) in FIG. 16), the proximity sensor S4 is detected in step ST3. Since it is off, the process proceeds to step ST12. Since the proximity sensor S3 is turned on in step ST12, the PLC 50 jumps to step ST8 and executes the subsequent processing.

Further, when the body 3 has already been moved from the horizontal retraction to the tilting and grounding at the start of the lowering operation (between (c) in FIG. 16 and (d) in FIG. 17), the proximity sensor S4 is turned off in step ST3. Therefore, the process proceeds to step ST12, and since the proximity sensor S3 is OFF in step ST12, the process proceeds to step ST13. And since proximity sensor S1 is OFF by step ST13, PLC50 jumps to step ST15 and performs the process after it.
If the body 3 has already been completely retracted (tilted, tilted, grounded and retracted at the start of the lowering operation) (state (d) in FIG. 17), the process proceeds from step ST3 to ST12, ST13, and in step ST13 the proximity sensor Since S1 is on, the PLC 50 jumps to step ST18 and executes the subsequent processing.

  Next, the body loading operation from the state shown in FIG. 14 and 15 are flowcharts of processing executed by the PLC 50 during body loading. For the sake of illustration, it is divided into two, but the symbols D, E, and F circled at the bottom of FIG. 14 are connected to the same symbols at the top of FIG. 15, and two flowcharts represent one flowchart. ing.

  When the processing of this flowchart is started, the PLC 50 waits for the loading switch to be turned on in step ST31 of FIG. Here, if the loading switch is turned on, the PLC 50 proceeds to step ST32 and determines whether or not the lowering switch is turned on. Here, the lowering switch is originally off, and the process proceeds to step ST33. If the lowering switch is turned on in step ST32, "loading" and "unloading" are simultaneously turned on, and this is a state to be erroneously operated. Therefore, the process returns to step ST31 and returns to step ST33. Does not advance.

  Subsequently, in step ST33, the PLC 50 determines whether or not the proximity sensor S4 is on, that is, whether the tilt frame 2 is in the landing state. If it is on, the process proceeds to step ST34, and if it is off, the process proceeds to step ST42. Since it is off here, it is determined whether or not the proximity sensor S2 is on in step ST34. The proximity sensor S2 that detects that the body 3 is at the predetermined slide position is OFF at this time, and therefore the PLC 50 proceeds to step ST35 and determines whether or not the proximity sensor S3 is ON. Here, since the proximity sensor S3 that detects that the tilt frame 2 is within the predetermined tilting range is off, the PLC 50 proceeds to step ST36 to excite the tilt cylinder solenoid valves 34 and 36, and the tilt cylinder 4 is turned on. Make extension work. Thereby, the tilt frame 2 tilts in the lying down direction. The extension operation is performed until the proximity sensor S3 is turned on (step ST37). When S3 is turned on in the state shown in FIG. 17D, the PLC 50 de-energizes the tilt cylinder solenoid valves 34 and 36. Then, the tilt cylinder 4 is stopped (step ST38).

  Next, the PLC 50 excites the slide motor solenoid valve 33 and rotates the slide motor 214 in the upward direction (step ST39). Thereby, the body 3 is pulled forward. This pulling-up operation is performed until the proximity sensor S2 is turned on (step ST40), and reaches the state (b) through the state (c) in FIG. Here, the proximity sensor S2 is turned on, and the PLC 50 stops the slide motor 214 (step ST41).

  Next, in step ST43, the PLC 50 excites the tilt cylinder solenoid valves 34 and 36 to extend the tilt cylinder 4. As a result, the tilt frame 2 is further tilted in the lying down direction. This tilting is performed until the proximity sensor S4 is turned on (step ST44). When the tilt frame 2 is in the state shown in FIG. 16A and the proximity sensor S4 is turned on, the PLC 50 The extension operation is stopped (step ST45).

  Next, the PLC 50 excites the slide motor solenoid valve 33 and rotates the slide motor 214 in the upward direction (step ST46). Thereby, the body 3 moves forward to a predetermined loading position. This forward movement is performed until the proximity sensor S1 is turned on (step ST47), and when S1 is turned on, the PLC 50 stops the slide motor 214 (step ST48). Finally, the process waits for the loading switch signal to turn off (step ST49). When the loading switch signal turns off, the process of the flowchart ends.

  There is a time lag based on the operating time of the solenoid valve 33 for the slide motor and the delay of the response of the hydraulic system until the slide motor 214 stops after the proximity sensor S1 is turned on. ) Comes into contact with the stopper 204, but the slide motor 214 is not stopped for a very short time (denoted as Δt). When the slide roller 16 comes into contact with the stopper 204 and stops, the connection pin 213 (FIG. 6) connecting the chain 212 in an endless manner is stopped because it is supported by the connecting member 19 closest to the slide roller 16. In contrast, the driving sprocket 207 (FIG. 6) continues to pull the chain 212. However, the distance from the driving sprocket 207 to the front sprocket 205 is sufficiently long, so that the strain amount ΔL of the chain 212 in the length direction is longer than the chain movement amount ΔX per time Δt. Therefore, it is possible to avoid overloading the chain 212.

  If the loading operation is stopped halfway, it is necessary to skip part of the operation when the loading operation is started again. For example, when the initial tilting has already ended at the start of the loading operation (the state shown in FIG. 17D), the process proceeds to steps ST33, 34, and 35, and the proximity sensor S3 is on, so that the PLC performs step ST39. Jump to. If the body 3 has advanced to a predetermined position (the state shown in FIG. 16B), the proximity sensor S4 is turned off in step ST33, and the proximity sensor S2 is turned on in step ST34. Steps ST35 to ST41 are skipped, and step ST43 and subsequent steps are executed. If the body 3 has already landed at the start of the lowering operation (FIG. 16 (a)), since the proximity sensor S4 is on in step ST33, the process proceeds to step ST42, and the proximity sensor S1 is turned on in step ST42. Otherwise, the process jumps to step ST46 to move the body 3 forward. If S1 is on in step ST42, the loading operation has already been completed. Therefore, the process jumps to step ST49 and waits for the loading switch signal to turn off. Finish the process.

  In the above loading and unloading operations, as shown in FIGS. 16 and 17, the mechanism (tilt cylinder 4 and driven part 2 </ b> A) for tilting the tilt frame 2 and the tilt frame 2 rotate in conjunction with tilting. The jack driving mechanism (the link member 11, the jack 13 and the like) that fits is contained in the space below the tilt frame 2 behind the vehicle body frame 1f. In this way, the dead space inevitably generated in the vehicle that loads and unloads the body 3 by tilting can be effectively utilized.

In the above-described embodiment, the body 3 is not removed from the tilt frame 2 even when the body 3 is lowered. However, if the body 3 is configured to be detachable from the tilt frame 2, the body 3 has been lowered (e in FIG. ), The body 3 can be removed from the tilt frame 2.
Further, the configuration in which the tilt frame 2 is tilted as described above can be applied to a loading / unloading vehicle in which the front end of the body 3 is not grounded. In such a vehicle, loading and unloading of the loaded vehicle is performed while the body 3 is tilted from the rear end ground contact state of the body 3 shown in FIG.

It is a side view of the body loading / unloading vehicle by one Embodiment of this invention. FIG. 2 is an enlarged side view of a body frame, a tilt frame, and a body in the body loading / unloading vehicle of FIG. 1. FIG. 3 is a plan view corresponding to FIG. 2. FIG. 3 is a side view further enlarging only a vehicle body frame and a tilt frame in FIG. 2. FIG. 5 is a plan view corresponding to FIG. 4. (A) is a more detailed plan view of the tilt frame alone, and (b) is a cross-sectional view taken along line BB in (a). (A) is the figure which expanded the A section enclosed with the circle of the dashed-two dotted line in FIG. 5, (b) is the figure which expanded the B section of FIG. 4 equivalent to the side view of A section. (C) is the figure which expanded the C section in FIG. 5 when a connection member came to a retreat end, (d) is the figure which expanded the D section of FIG. 4 equivalent to the side view of a C section. . (E) is the figure which expanded the EE sectional view in FIG. 5, (f) is the figure which expanded the F section of FIG. (G) is the figure which expanded the G section of Drawing 5, (h) is the figure which expanded the HH line section equivalent to the side view of G section. (I) is the figure which expanded the I section of FIG. 5, (j) is the figure which expanded the arrow J figure equivalent to the side view of the I section. It is a hydraulic circuit diagram of the body loading / unloading vehicle. It is an electric circuit diagram of the said body loading / unloading vehicle. It is a side view which shows the principal part in connection with tilting operation | movement of the tilt frame in the said body loading / unloading vehicle. It is a flowchart (1/2) of the process performed by PLC at the time of body unloading of the said body unloading vehicle. It is a flowchart (2/2) of the process performed by PLC at the time of body unloading of the said body unloading vehicle. It is a flowchart (1/2) of the process performed by PLC at the time of body loading of the said body unloading vehicle. It is a flowchart (2/2) of the process performed by PLC at the time of body loading of the said body unloading vehicle. It is a side view which shows in order the process of unloading a body in the said body unloading vehicle. It is a side view which shows in order the process of unloading a body in the said body unloading vehicle. FIG. 4 is a side view showing a state in which a chassis frame and a sub frame constituting the body frame are separated in the body loading / unloading vehicle. It is XIX-XIX sectional drawing in FIG.

Explanation of symbols

1 body 1f body frame 1f1 chassis frame 1f2 subframe 1fx cross member 2 tilt frame 2A driven part 3 body 4 tilt cylinder 101 support member (body frame side support member)
102a Reinforcing member 201 Main body 202 Support member (tilt frame side support member)
214 Slide motor (motor)

Claims (5)

A vehicle body having a vehicle body frame;
Tilt having a driven portion at a portion protruding rearward from the vehicle body frame, with the vehicle width direction as an axial direction, and being tiltably attached to the vehicle body frame around a tilting shaft provided at the rear portion of the vehicle body frame Frame,
A loading body capable of loading and unloading with respect to the tilt frame;
A tilt cylinder that has one end supported at the rear of the vehicle body frame below the tilting shaft and the other end supported by the driven portion, and that drives the tilt frame around the tilting shaft by extending and contracting. Body loading and unloading vehicle characterized by.   The body loading / unloading vehicle according to claim 1, further comprising a slide mechanism that slides the body back and forth with respect to the tilt frame, wherein a motor that is a driving source is provided in the driven portion.   The body loading / unloading vehicle according to claim 2, wherein the driven portion includes a tilt frame side support member integrally provided on a main body portion of the tilt frame, and the motor is attached to the tilt frame side support member.   The vehicle body frame side support member is attached to the rear of the rearmost cross member in the chassis frame of the vehicle body frame, and one end of the tilt cylinder is pivotally attached to the vehicle body frame side support member. Body loading and unloading vehicle as described in.   The body loading / unloading vehicle according to claim 4, wherein a reinforcing member extending in a vehicle width direction is provided on the vehicle body frame side support member.

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