JP2008094397A - Trailer - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To further improve the ease of use of a trailer provided with a tilt frame. <P>SOLUTION: When an angle of inclination θ of the tilt frame 16 is changed, a lock bar 26 follows the tilt frame 16 and moves by drawing a circular arc. A sleeve 28 supporting the lock bar 26 slidably is fixed to a chassis frame 14 by bearings 32, 34. Consequently, the sleeve 28 follows the circular arc movement of the lock bar 26 and supports the lock bar 26 by sliding while changing an angle for the chassis frame 14. A plurality of through holes are formed at the lock bar 26, and through holes agreeing with the through holes in the lock bar 26 are formed at centers of the bearings 32, 34 of the sleeve 28. A pin 36 is inserted into one of the through holes in the lock bar 26 and the through holes of the bearings 32, 34 of the sleeve 28 to position the lock bar 26 and the sleeve 28 mechanically. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a trailer having a tilt frame that is set to a predetermined tilt angle and is fixed.

  When transporting large steel plates with a load width exceeding the regulation value of the Road Traffic Act etc. used for ships, plants, etc., conventionally, along the route notified in advance at midnight when the deregulation measures are applied It was being transported. However, in order to eliminate the inefficiency of such a transport method and the complexity of the procedure, a trailer in which a cargo bed is configured by a tilt frame fixed at a predetermined tilt angle has been developed (see, for example, Patent Document 1). .) According to this trailer, by fixing a wide load to the loading platform and tilting the loading platform, the apparent loading width is within the regulation, and large steel plates are efficiently conveyed without being restricted by time or route. It became possible.

Japanese Patent Publication No. 55-38293

  An object of the present invention is to further improve the usability of a trailer provided with a tilt frame for conveying a load such as a large steel plate whose load width exceeds a regulation such as the Road Traffic Law.

  In order to solve the above problems, a trailer according to the present invention includes a tilt frame supported on a chassis frame by a tilt hinge having a rotation axis extending in the front-rear direction, drive means for changing the tilt angle of the tilt frame, and the tilt A frame tilt angle detecting means; and a fixing means for fixing the tilt angle of the tilt frame when the tilt angle of the tilt frame is at a predetermined angle. The fixing means includes a lock bar and a lock bar. A sleeve that is slidably supported in a longitudinal direction, and an upper end portion of the lock bar is attached to the tilt frame by a bearing having a rotation shaft parallel to the tilt hinge, and changes an inclination angle of the tilt frame. While the sleeve is being moved, the sleeve slides and supports the lock bar while changing the angle with respect to the chassis frame around the bearing. As described above, the sleeve is pivotally attached to the chassis frame by a bearing that is parallel to the tilt hinge and in which the slide axis and the rotation axis of the lock bar are orthogonal to each other, and the tilt angle of the tilt frame is set on the lock bar. When there is a predetermined angle, a through hole whose center coincides with the rotation axis of the sleeve is formed, and a through hole which coincides with the through hole of the lock bar is formed at the center of the bearing of the sleeve, and these A pin comprising a pin inserted into the through hole, and a drive means for the pin, wherein a drive means for changing the tilt angle of the tilt frame and a control means for controlling the drive means for the pin are provided. To do.

  According to the present invention, when the tilt angle of the tilt frame is changed around the tilt hinge by the drive means for changing the tilt angle of the tilt frame, the lock attached to the tilt frame by the bearing having the rotation axis parallel to the tilt hinge. The bar moves with the tilt frame. At this time, the lock bar moves so as to draw an arc following the rotation operation around the tilt hinge of the tilt frame. On the other hand, the sleeve that pivotally supports the lock bar slidably supports the lock bar while changing the angle with respect to the chassis frame around the bearing while changing the tilt angle of the tilt frame. Since it is attached to the chassis frame by a bearing that is parallel to the tilt hinge and whose sliding axis and rotation axis of the lock bar are orthogonal to each other, it follows the arc movement of the lock bar, and the angle with respect to the chassis frame around the sleeve bearing The lock bar is slidably supported while changing smoothly.

That is, the rotation axis of the sleeve bearing mounted on the chassis frame and the sliding axis of the lock bar always maintain an orthogonal relationship regardless of the tilt angle of the tilt frame. In addition, the lock bar is formed with a through hole whose center coincides with the rotational axis of the sleeve when the tilt angle of the tilt frame is a predetermined angle, and coincides with the through hole of the lock bar at the center of the bearing of the sleeve. A through hole is formed.
Therefore, the driving means for changing the tilt angle of the tilt frame is driven by the control means, and when the tilt frame is detected by the detecting means of the tilt angle of the tilt frame, the control means pins the tilt frame. By controlling the driving means, the pin is inserted into the through-hole of the lock bar and the through-hole of the bearing of the sleeve, and the lock bar and the sleeve are mechanically positioned, and the tilt frame tilts with respect to the chassis frame. The angle is fixed without resorting to drive means that change the tilt angle of the tilt frame.

  In the present invention, a ball joint is disposed between the pin and a cylinder rod of an air cylinder which is a driving means for the pin.

  As in this configuration, by disposing the ball joint between the pin and the cylinder rod of the air cylinder, it is possible to absorb misalignment between the through hole of the bearing and the cylinder rod of the air cylinder.

In the present invention, the control means, after receiving an operation instruction from the operator, until an angle selected from preset inclination angles is detected by the inclination angle detection means of the tilt frame. Control logic for operating the drive means for changing the tilt angle of the tilt frame and automatically stopping the drive means when the selected angle is detected by the tilt angle detection means for the tilt frame, and the drive means It is desirable to provide a control logic that enables the driving means of the pin to operate in a state where the pin is automatically stopped.
With this configuration, the tilt frame tilt angle changing operation and the tilt frame tilt angle fixing operation are automatically performed.

  Since the present invention is configured as described above, it is possible to further improve the usability of the trailer provided with a tilt frame that transports a load of a large steel plate or the like whose load width exceeds a regulation such as the Road Traffic Law.

The best mode for carrying out the present invention will be described below with reference to the accompanying drawings.
As shown in FIGS. 1 to 3 and 9, the trailer 10 according to the embodiment of the present invention includes a tilt frame 16 that is pivotally supported on a chassis frame 14 by a tilt hinge 12 that has a rotation axis extending in the front-rear direction, and a tilt frame. When the tilt angle of the tilt frame 16 is a predetermined angle, the hydraulic tilt cylinder 18 that is a drive means for changing the tilt angle of the frame 16, the tilt angle detection means 20 of the tilt frame 16, and the tilt frame 16 is at a predetermined angle. And fixing means 22 for fixing the inclination angle. Here, the tilt frame 18 constitutes a loading platform of the trailer 10. In the embodiment of the present invention, the tilt cylinder 18, the detection means 20, and the fixing means 22 are provided at two positions near the front and rear of the trailer 10, respectively.

  In the illustrated example, the tilt hinge 12 is disposed in the vicinity of the left end of the tilt frame 16 in the vehicle width direction. When the tilt frame 16 is in a horizontal state, the tilt frame 16 is mounted on the chassis frame 14. Placed. On the other hand, when the tilt frame 16 tilts, the tilt frame 16 rotates around the tilt hinge 12, and the right end of the tilt frame 16 in the width direction is lifted upward. Also, a plurality of extendable bolsters 24 that are extendable in parallel with the tilt frame 16 are provided from the right end of the tilt frame 16 in the width direction of the tilt frame 16, and the load width exceeds a regulation such as the Road Traffic Law. The steel plate can be securely fixed by the tilt frame 16 and the telescopic bolster 24. The expansion / contraction operation of the expansion / contraction bolster 24 can be performed manually when the tilt frame 16 is in a horizontal state. Further, a fixing means (not shown) for fixing the expansion / contraction bolster 24 at a desired expansion / contraction position is provided. As shown in FIG. 9, the tilt cylinder 18 is mounted on the chassis frame 14 by a bearing having a cylinder sleeve side end portion 18 a having a rotation axis parallel to the tilt hinge 12, and the cylinder rod side end portion 18 b is mounted on the tilt hinge 12. Is attached to the tilt frame 16 by a bearing having a rotational axis parallel to the tilt frame 16.

The fixing means 22 constitutes a mechanical lock mechanism as shown in FIGS. First, the fixing means 22 includes a lock bar 26 and a sleeve 28 that pivotally supports the lock bar 26 slidably in the longitudinal direction. The upper end portion of the lock bar 26 is pivotally attached to the tilt frame 16 by a bearing 30 having a rotation axis parallel to the tilt hinge 12, and the sleeve 28 rotates in parallel with the tilt hinge 12 and the sliding axis of the lock bar 26. The shaft is attached to the chassis frame 14 so that both sides are sandwiched between bearings 32 and 34 having orthogonal axes. In the illustrated example, the lock bar 26 is formed of a cylindrical member having a square cross section, and the sleeve 28 is formed of a square tube that slidably guides the outer peripheral surface of the lock bar 26. In this description, the “sliding shaft” of the lock bar 26 means the sliding direction of the lock bar 26 slidably guided by the sleeve 28, that is, the central axis C ₂₆ in the longitudinal direction of the lock bar 26. ing.

Further, the lock bar 26, the inclination angle theta (Fig. 3, see FIG. 9) of the tilt frame 16 when there is a predetermined angle, the through holes 26a, 26b of the center coincides with the pivot axis _{C 28} of the sleeve 28, 26c , 26d, and through holes 32a, 34a corresponding to the through holes 26a-26d of the lock bar are formed at the centers of the bearings 32, 34 of the sleeve 28. And the pin 36 inserted in these through-holes, and the air cylinder 38 which is a drive means of the pin 36 are provided. As indicated by phantom lines in FIG. 5, the tip of the pin 36 is always engaged with the through hole 32 a of one bearing 32 even when the cylinder rod 38 is contracted most. Further, the pin 36 is pushed out by the air cylinder 38 so that the through hole 26a (26b, 26c, 26d) of the lock bar 26 and the other of the through hole 32a of the bearing 32 and the other as shown by the solid line in FIG. The through hole 34a of the bearing 34 is also engaged. Further, a ball joint 39 is disposed between the pin 36 and the cylinder rod 38a of the air cylinder 38 to absorb misalignment between the through hole 32a of the bearing 32 and the cylinder rod 38a of the air cylinder 38. is doing.
7 is provided as a control means for the tilt cylinder 18 for changing the tilt angle θ of the tilt frame 16 and the air cylinder 38 for driving the pin 36 (for the control box 40). I will explain later.)

  As shown in FIG. 6, the detecting means 20 for the tilt angle θ of the tilt frame 16 includes a sensor box 44 in which a plurality of sensors 42 (42 </ b> A, 42 </ b> B, 42 </ b> C, 42 </ b> D) are arranged, and is slidable on the sensor box 44. And a rod 48 supported by the motor. A dog 46 of the sensor 42 is fixed to the rod 48. Inside the sensor box 44, a guide sleeve 44b positioned by a reinforcing plate 44a is provided, and a rod 48 is slidably guided to the guide sleeve 44b. In addition, a guide plate 48 a that is in sliding contact with the inner wall surface of the sensor box 44 is provided at the tip of the rod 48. The guide plate 48a is provided with notches for avoiding the plurality of sensors 42. The sensor box 42 is pivotally attached to the chassis frame 14 by a bearing 50 having a rotation axis parallel to the tilt hinge 12 (see FIG. 3), and the rod 48 is tilted by a bearing 52 having a rotation axis parallel to the tilt hinge 12. 16 (see FIG. 3).

  The plurality of sensors 42 (42A, 42B, 42C, 42D) are provided in the sensor box 44 along the sliding direction of the rod 48, and each of the through holes 26a to 26d of the lock bar 26 is provided. When the through holes 32a and 34a of the bearings 32 and 34 of the sleeve 28 coincide with each other, they are arranged at positions that coincide with the dog 46. Further, as schematically shown in FIG. 8, each of the plurality of sensors 42 includes a pair of protrusions 42 e, and light rays (infrared light or the like) irradiated between the protrusions 42 e are blocked by the dog 46. A detection signal is transmitted. Note that the detection range of the sensor 42 has a certain width and absorbs the dimensional tolerances set on the pin 36 and 26a to 26d of the lock bar 26, so that the pin 38 has the through holes 26a to 26d. As long as the tilt angle θ of the tilt frame 16 is at a predetermined angle, the sensor 42 also detects that the tilt angle θ is at a predetermined angle.

Here, a procedure for changing the tilt angle of the tilt frame 16 of the trailer 10 together with the configuration of the control box 40 shown in FIG. 7 will be described.
The control box 40 is attached to the right side of the trailer 10 (see FIG. 1). The inside of the control box 40 receives the detection signals of the solenoid valve for the hydraulic circuit for the tilt cylinder 18, the solenoid valve for the air cylinder 38 and the plurality of sensors 42, displays the necessary display, and receives the operation of the operator. A control device (such as a microcomputer) for controlling the solenoid valve for the hydraulic circuit for the tilt cylinder 18 and the solenoid valve for the air cylinder 38 is provided. Moreover, the pendant 54 for operation can be taken out by opening the cover 41 of the control box 40 fixed by the latch. The control box 40 includes a power switch 40a for turning on and off the control system, an angle setting switch 40b for setting the tilt angle of the tilt frame 16, a single operation switch 40c for stopping the operation of the rear tilt cylinder 18, A single operation switch 40d for stopping the operation of the front tilt cylinder 18 and an interlock release button 40e for releasing the interlock only while the switch is pressed are provided. The angle setting switch 40b can set the setting angle θ of the tilt frame 16 to any one of 0 °, 33 °, 41 °, and 45 °. Also, this angle can be set to a different angle as required.

  Further, as indicator lamps, lamps 40f, 40g, 40h, and 40j indicating the horizontal position, θ = 33 ° position, θ = 41 ° position, and θ = 45 ° position of the front tilt cylinder 18 and the front fixing means 22 are provided. Are provided with lock and unlock lamps 40k, 40m indicating that the mechanical positioning by the pin 36 has been performed. Similarly, in the lamps 40n, 40p, 40q, and 40r indicating the horizontal position, θ = 33 ° position, θ = 41 ° position, and θ = 45 ° position of the rear tilt cylinder 18 and the rear fixing means 22, Locking and unlocking lamps 40s and 40t indicating that the mechanical positioning by the pin 36 has been performed are provided. Reference numeral 40u denotes a storage space for the pendant 54.

On the other hand, the pendant 54 includes an ascending button 54a, a descending button 54b for interlocking the front and rear tilt cylinders 18, lock and unlock buttons 54c and 54d for the front fixing means 22, and lock and unlock button 54e for the rear fixing means 22. , 54f are provided. The pendant 54 and the control box 40 are connected by a cable 56, and a hanger 58 for winding the cable 56 is provided in the vicinity of the control box 40.
is set up.
The electric power for performing the angle changing operation of the tilt frame 16 may be supplied from a tractor, or may be supplied from a battery mounted on a trailer.

The operator turns on the power switch 40a and sets the tilt angle of the tilt frame 16 by the angle setting switch 40b. Then, the unlock buttons 54d and 54f of the pendant 54 are pushed, the air cylinder 38 is shortened, and the pin 36 is removed from any of the through holes 26a, 26b, 26c and 26d of the lock bar 26. At this time, the unlock lamps 40m and 40t are turned on.
Subsequently, the front and rear tilt cylinders 18 are operated by pressing the up button 54a or the down button 54b. When the tilt frame 16 reaches the set angle, it is detected by the sensor 42 and the front and rear tilt cylinders 18 are automatically stopped. In FIG. 2, the tilt frame 16 is at θ = 0 °, the tilt frame 16 ′ is at the θ = 33 ° position, the tilt frame 16 ″ is at the θ = 41 ° position, and the tilt frame 16 ′ ″ is at the θ = 45 ° position. , Respectively. Then, the lamp having the set angle (any one of 40f, 40g, 40h, 40j, 40n, 40p, 40q, and 40r) is turned on. When the sensor 42 relating to an angle other than the set angle detects the dog 46 while the tilt angle of the tilt frame 16 is being changed, the detection signal is ignored. When the lamp at the set angle is lit, the lock buttons 54c and 54e of the pendant 54 are pushed, the air cylinder 38 is extended, and the pin 36 is inserted into the through holes 26a, 26b, 26c and 26d of the lock bar 26. Insert one of them. At this time, the lock lamps 40k and 40s are turned on.
If necessary, the control logic of the control box 40 can be changed so that the lock operation by the pin 36 is automatically performed when the angle of the tilt frame 16 reaches the set angle. .

According to the embodiment of the present invention configured as described above, the following operational effects can be obtained.
First, when the tilt angle θ of the tilt frame 16 is changed around the tilt hinge 12 by the tilt cylinder 18, the lock bar 26 pivotally attached to the tilt frame 16 by the bearing 30 having a rotation axis parallel to the tilt hinge 12 is It moves together with the tilt frame 16. At this time, the lock bar 26 follows a rotating operation around the tilt hinge 12 of the tilt frame 16 and moves so as to draw an arc (see FIG. 3). On the other hand, the sleeve 28 that pivotally supports the lock bar 26 is slidably supported on the chassis frame 14 by bearings 32 and 34 that are parallel to the tilt hinge 12 and perpendicular to the slide axis C 26 of the lock bar ₂₆ and the rotation axis C _28. It is worn. Accordingly, the lock bar 26 is slidably supported while following the arc motion of the lock bar 26 and smoothly changing the angle of the sleeve 28 with respect to the chassis frame 14 around the bearings 32 and 34.

That is, while the tilt angle θ of the tilt frame 16 is changed, the sleeve 28 slides and supports the lock bar 26 while changing the angle with respect to the chassis frame 14 around the bearings 32 and 34. It has been sliding shaft _{C 26} (see FIGS. 4 and 5) of the pivot shaft _{C 28} and the lock bar 26 of the bearing 32, 34 of the sleeve 28 and, regardless of the inclination angle θ of the tilt frame 16, always Maintain an orthogonal relationship. Moreover, the lock bar 26 when the inclination angle θ of the tilt frame 16 is at a predetermined angle, the through hole 26a of the center coincides with the pivot axis _{C 28} of the sleeve 28, 26b, 26c, 26 d are formed, the sleeve 28 In the center of the bearings 32 and 34, through holes 32a and 34a that coincide with the through holes 26a, 26b, 26c, and 26d of the lock bar 26 are formed.
Accordingly, when the tilt cylinder 18 for changing the tilt angle θ of the tilt frame 16 is driven by the control box 40 and the tilt frame tilt angle detecting means 20 detects that the tilt frame 16 has reached the predetermined angle. Then, the air cylinder 38 for driving the pin 36 is controlled by the control box 40, and any one of the through holes 26a, 26b, 26c or 26d of the lock bar 26 and the through holes 32a of the bearings 32, 34 of the sleeve 28 are matched. By inserting the pin 36 through the pin 34a, the lock bar 26 and the sleeve 28 are mechanically positioned, and the tilt angle θ of the tilt frame 16 with respect to the chassis frame 14 changes the tilt angle θ of the tilt frame 16. It will be fixed without relying on the cylinder 18 .

  Further, the ball joint 39 is disposed between the pin 36 and the cylinder rod 38a of the air cylinder 38, thereby absorbing the misalignment between the through hole 32a of the bearing 32 and the cylinder rod 38a of the air cylinder 38. be able to.

  In addition, the control box 40 is operated by an operator (the power switch 40a is turned on, the tilt angle of the tilt frame 16 is set by the angle setting switch 40b, the unlock buttons 54d and 54f of the pendant 54 are pressed, and the ascending button 54a or the lowering button 54b), the tilt frame 16 is tilted until an angle selected from preset tilt angles is detected by the tilt angle θ detection means 20 of the tilt frame 16. A control logic is provided that operates the tilt cylinder 18 for changing the angle and automatically stops the tilt cylinder 18 when the selected angle is detected by the detection means 20. In addition, control logic that enables the air cylinder 38 that drives the pin 36 to operate while the tilt cylinder 18 is automatically stopped is provided. Therefore, the work for changing the tilt angle θ of the tilt frame 16 and the work for fixing the tilt angle θ of the tilt frame 16 are automatically performed.

It is a schematic diagram which shows the characteristic part of the trailer which concerns on embodiment of this invention, (a) is a top view, (b) is a left view. It is a rear view of the trailer shown in FIG. FIG. 2 is a schematic rear view of the means for detecting the tilt angle of the tilt frame of the trailer shown in FIG. 1 and the fixing means for fixing the tilt angle of the tilt frame when the tilt angle of the tilt frame is at a predetermined angle. is there. It is a principal part enlarged view of the fixing means shown by FIG. It is AA sectional drawing of FIG. It is a principal part expanded sectional view of the detection means shown by FIG. It is a schematic diagram which shows the control means of the trailer shown by FIG. It is a perspective view which shows the structure of the sensor of the detection means shown by FIG. It is the schematic which looked at the drive means which changes the inclination-angle of the said tilt frame of the trailer shown by FIG.

Explanation of symbols

  10: trailer, 12: tilt hinge, 14: chassis frame, 16: tilt frame, 18: tilt cylinder, 20: detection means, 22: fixing means, 26: lock bar, 26a, 26b, 26c, 26d: through hole, 28 : Sleeve, 30, 32, 34: Bearing, 32a, 34a: Through hole, 36: Pin, 38: Air cylinder, 40: Control box, 42, 42A, 42B, 42C, 42D: Sensor, 44: Sensor box, 46 : Dog, 48: Rod, 50, 52: Bearing, 54: Pendant

Claims (3)

A tilt frame pivotally supported on a chassis frame by a tilt hinge extending in the front-rear direction, drive means for changing the tilt angle of the tilt frame, tilt angle detection means for the tilt frame, and tilt angle of the tilt frame Fixing means for fixing the tilt angle of the tilt frame when is at a predetermined angle,
The fixing means includes a lock bar and a sleeve that rotatably supports the lock bar in a longitudinal direction, and an upper end portion of the lock bar is attached to the tilt frame by a bearing having a rotation shaft parallel to the tilt hinge. The sleeve is parallel to the tilt hinge so that the sleeve slides and supports the lock bar while changing the angle with respect to the chassis frame around the bearing while being pivotally mounted and changing the tilt angle of the tilt frame. The slide bar of the lock bar is pivotally attached to the chassis frame by a bearing whose rotation axis is orthogonal,
When the tilt angle of the tilt frame is at a predetermined angle, the lock bar is formed with a through hole whose center coincides with the rotation axis of the sleeve, and the through hole of the lock bar is formed at the center of the bearing of the sleeve. A through hole that coincides with the pin, and a pin inserted through the through hole, and a drive means for the pin,
2. A trailer comprising: a drive unit that changes the tilt angle of the tilt frame; and a control unit that controls the drive unit of the pin. The trailer according to claim 1, wherein a ball joint is disposed between the pin and a cylinder rod of an air cylinder that is a driving means for the pin. The control means receives the operation instruction from the operator, and then the tilt angle of the tilt frame until an angle selected from preset tilt angles is detected by the tilt angle detection means of the tilt frame. A control logic for automatically stopping the drive means when the selected angle is detected by the tilt angle detection means of the tilt frame, and a state in which the drive means is automatically stopped. The trailer according to claim 1, further comprising control logic that enables the driving means of the pin to operate.

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