JP6289722B1 - Trailer support device having a rotating widening support leg - Google Patents

Abstract

In a trailer support device attached to a towed vehicle, the support leg can be stored compactly within the range of the trailer when retracted, and the front end side of the trailer can be supported outside the trailer width when the support leg is used. Provided is a trailer support device including support legs. SOLUTION: An air cylinder 12, a cylindrical center clutch 5 provided on a rotating shaft 4, a bearing 7, a support leg 2, and a rotation stopper 8 are provided. 6 and a cam follower 20, and the center clutch 5 and the rotation stopper 8 have a fitting clutch function including a member formed by a plurality of concave and convex portions that can be engaged and separated from each other. The trailer support device is characterized in that the support leg 2 connected to the rotation shaft 4 can be slid and rotated by following the movement of the rotation shaft 4 by driving the air cylinder. [Selection] Figure 2

Description

The present invention relates to a trailer support device that can support the front end side of a trailer that is a towed vehicle.

2. Description of the Related Art A vehicle in which a tractor that is a tow vehicle and a trailer that is a towed vehicle are connected includes a trailer that connects the front end side of the trailer to a connector on the rear end side of the tractor. Since such a trailer travels by being pulled by a tractor, no driving wheel is provided on the front end side of the trailer, and traveling wheels are disposed on the rear end side of the trailer.

Generally, a trailer, which is a towed vehicle, includes a support leg that supports the front end side of the trailer by grounding to the ground when the trailer is separated from the tractor.

As described in Patent Document 1, a trailer support device equipped with a conventional trailer has been disclosed in which an air cylinder is driven by an air pressure source to vertically move a trailer support leg. .

Further, as described in Patent Document 2, there is a trailer support device that stores the inner cylinder portion of the auxiliary leg by rotating the leg portion upward after moving the inner cylinder portion constituting the lower portion of the auxiliary leg upward. It is disclosed.

Further, as described in Patent Document 3, a trailer support device is disclosed in which a drive rotation shaft is rotated by manual operation of a handle or pneumatic pressure, and a trailer auxiliary leg is vertically moved up and down.

Japanese Patent No. 6153276 Japanese Patent Laid-Open No. 10-138887 Japanese Patent Application Laid-Open No. 2014-151677

The support legs of the conventional trailer support apparatus are mainly those that move up and down vertically, and there is a problem that the apparatus cannot be attached if there is equipment under the trailer. Further, if the support legs of the trailer support device are protruded outside the trailer vehicle body in order to avoid the equipment, there is a risk of running.

Conventionally, when separating the trailer from the tractor, it is a burden on the operator because there are many devices that have to be extended and fixed by manual work, and the support legs installed in the trailer In the case of a structure using a power source, a hydraulic cylinder, a drive gear, etc., the trailer must be equipped with a dedicated hydraulic circuit or drive gear. Moreover, hydraulic equipment such as an oil pump used in the hydraulic circuit is very expensive. Therefore, these not only lead to a significant increase in cost, but also increase the weight of the device and complicate the structure.

The present invention has been made based on the above circumstances, and uses a pneumatic pressure source of a compressed air tank mounted on a trailer, regardless of hydraulic or drive gear equipment, and supports a support leg that supports the front end side of the trailer. A trailer support device that can be expanded and contracted by driving a cylinder, and aims to easily and safely operate a support leg of the trailer.

In addition, the trailer support device includes a support leg that stores the support leg within a range of the trailer width when the trailer support leg is stored, and can support the front end side of the trailer outside the trailer vehicle body when the support leg is used. Is to provide.

The first embodiment is a trailer support device that can support the front end side of a trailer that is a towed vehicle, and includes a cylindrical center clutch provided on a cylindrical rotation shaft, a bearing, and an end surface portion of the bearing. And has a fitting clutch function with a member formed of a plurality of concave and convex portions that can be engaged with and separated from each other and both end faces of the center clutch. A balancer is provided at the upper part of the leg to keep the support leg in balance with the axis of the rotating shaft, and the bearing that supports the rotating shaft is a sliding bearing that is slidably supported. The trailer support device is characterized by being manually slidable and rotatable.

In addition, the rear end clutch provided at the rear part of the rotating shaft and the anti-rotation front end provided at the other end face part of the bearing have a fitting clutch function provided with a member formed by a plurality of concave and convex parts that can be engaged and separated from each other. In addition, the load can be more firmly and stably supported by double engaging clutches when standing.

In the second embodiment, the trailer support device according to the first embodiment described above includes an air cylinder driven by an air pressure source, a groove cam on the outer peripheral surface of the rotating shaft, and a cam follower, and a rod of the air cylinder; By connecting the rotating shaft at the rod end, engaging the cam follower and groove cam, and moving the rotating shaft following the rotating shaft by driving the air cylinder, the support leg connected to the rotating shaft can be slid and rotated. This is a trailer support device characterized in that

In the trailer support device of the second embodiment described above, the third embodiment is in contact with the inclined surface while the front end of the center clutch is in contact with the front end of the rotation stop when the support leg is retracted from the stand-up position. When the support leg is slid from the stand-up position to the retracted position, the cam follower and the groove cam are engaged, and the support shaft connected to the rotation shaft is slid and rotated by following the rotation shaft. The trailer support device is characterized by being movable.

The fourth embodiment includes a convex parallel key provided on the side surface of a cylindrical rotation shaft, a bearing, a key groove provided on the inner peripheral surface of the bearing, an air cylinder driven by an air pressure source, A member having a groove cam on the outer peripheral surface of the dynamic shaft, a cam follower on the inner peripheral surface of the bearing, and a support leg, and formed of a plurality of concave and convex portions that allow the parallel key and the key groove to be engaged and separated from each other. This is a sliding bearing that has a fitting clutch function and the bearing that pivotally supports the rotating shaft is slidably supported. A balancer is provided on the upper part of the supporting leg to maintain the balance of the supporting leg at the axis of the rotating shaft. By connecting the rod of the air cylinder and the rotating shaft at the rod end, engaging the cam follower and the grooved cam, and moving the rotating shaft following the rotating shaft by driving the air cylinder, the supporting leg connected to the rotating shaft is Trailer characterized by being able to slide and rotate A lifting device.

In the connection between the air cylinder and the rotary shaft of the second embodiment to the fourth embodiment described above, the air cylinder adopts a rod detent type, and the rod end disk and the engaging portion are engaged to form an air The support leg connected to the rotation shaft can be slid and rotated without rotating the rod of the cylinder.

As a function to prevent the rotation shaft from sliding, it is equipped with a mechanism that operates a rod air cylinder at both ends driven by an air pressure source and inserts a lock pin into the rotation shaft to stop the rotation shaft. And a grounding portion that can be tilted by providing a sphere at the lower end of the feed screw.

The trailer support device can be attached to the lower part of the trailer and supported at the front end side of the trailer, or a plurality of trailer support devices can be attached to the lower part of the vehicle container and can be self-supported only by the trailer support device. It is a container for vehicles.

When storing the support legs, it is possible to store the support legs at the bottom of the trailer, and when setting the support legs upright, the pivot is pivoted and widened to support the trailer with the support legs and fit. By adopting a means for providing a clutch, a stable load support can be obtained even with a trailer on which a heavy object is mounted.

It is a perspective view of the trailer support device of a first embodiment. It is a perspective view of the trailer support device of a second embodiment. It is a perspective view of the trailer support device of a third embodiment. It is a perspective view of the trailer support device of a fourth embodiment. It is a component diagram of the center clutch and rotation stopper of 1st embodiment and 2nd embodiment. It is a component diagram of the center clutch and rotation stopper of 3rd embodiment. It is operation | movement explanatory drawing from the time of storage of the support leg in 1st embodiment to the time of standing. It is operation | movement explanatory drawing from the time of storage of the support leg in 2nd embodiment to the time of standing. It is operation | movement explanatory drawing from the time of standing of the supporting leg in 2nd embodiment to the time of storage. It is the cutting figure of the rotating shaft in 2nd embodiment, and the example of a pattern of a groove cam. It is explanatory drawing which shows the motion of the rotating shaft and the locus | trajectory of a cam follower in 2nd embodiment. It is sectional drawing of the rotating shaft and bearing in 2nd embodiment. It is operation | movement explanatory drawing from the time of storage of the support leg in the third embodiment to the time of standing. It is operation | movement explanatory drawing from the time of standing up to the time of storage of the support leg in 3rd embodiment. It is explanatory drawing which shows rotation operation | movement of the center clutch in 3rd embodiment. It is the cutting figure of the rotating shaft in 3rd embodiment, and the example of a pattern of a groove cam. It is explanatory drawing which shows the motion of the rotating shaft and the locus | trajectory of a cam follower in 3rd embodiment. It is sectional drawing of the rotating shaft and bearing in 3rd embodiment. It is explanatory drawing at the time of storage of the support leg in 4th embodiment, and the time of standing. It is a cutaway view of a rotating shaft and a bearing in the fourth embodiment. It is a principal part block diagram of the air cylinder and center clutch in 2nd embodiment. It is a figure which shows the state which mounted | wore the tiltable grounding part under the support leg in 2nd embodiment. It is the side view which attached the trailer support device in a second embodiment to the trailer. It is explanatory drawing which showed sequentially the procedure which isolate | separates a tractor and a trailer using the trailer support apparatus of this invention. It is the perspective view which attached the trailer support device of the present invention to the container for vehicles.

The present invention will be described based on the embodiment shown in FIGS.

FIG. 1 is a perspective view of a trailer support device 1 according to the first embodiment. As shown in FIG. 1A, the trailer support device 1 includes a support leg 2, a balancer 3, a rotating shaft 4, a center clutch 5, a rear end clutch 5b, a bearing 7, and a rotation stop front end 8. And a rotation stop rear end 9. The state where the support leg 2 of the trailer support device 1 is stored in the lower part of the trailer 100 is shown. Between the two bearings 7, a rotation stop rear end 9, a center clutch 5, and a rotation stop front end 8 are arranged in the axial direction of the rotation shaft 4.

The balancer 3 is a member such as lead having a weight similar to that of the support leg 2, and is attached to the upper part of the support leg 2 with a bolt or the like and serves as a weight. The axis of the rotating shaft 4 serves to keep the balancer 3 and the support leg 2 in balance and to make the support leg 2 stable and level.

The rotating shaft 4 is a cylindrical steel material and is supported by a bearing 7. The outer peripheral surface of the rotating shaft 4 is slidable in the axial direction along the inner peripheral surface of the bearing 7, and the outer peripheral surface of the rotating shaft 4 is circumferential along the inner peripheral surface of the bearing 7. It can slide and turn. A feature of the present invention is that it is a sliding bearing that slidably supports a bearing 7 that supports the rotating shaft 4.

The trailer support device 1 shown in FIG. 1B slides 90 degrees by sliding in the circumferential direction after manually sliding the pivot shaft 4 supported by the bearing 7 in the axial direction of the pivot shaft 4. The state where it is rotated and made to stand by the support leg 2 is shown.

Fitting clutch function provided with a member in which a rear end clutch 5b provided at the rear portion of the rotating shaft 4 and a rotation stop front end 8 provided at the other end surface portion of the bearing 7 are formed by a plurality of concave and convex portions that can be engaged with and separated from each other. When the vehicle is in a standing position, it is possible to obtain a more firmly and stable load support by double-engaging the clutch.

The support leg 2 is a quadrangular cylindrical tubular steel material, and when rotated downward by 90 degrees, the lower end touches the ground and can hold the trailer 100 horizontally. When the support leg 2 of FIG. 1 (a) is retracted and the support leg 2 of FIG. 1 (b) is standing, the shaft is fixed by a lock pin 21 so as not to slide.

The first embodiment is characterized in that the support leg 2 of the trailer support device 1 can swing in the circumferential direction around the axis of the rotation shaft 4.

FIG. 2 is a perspective view of the trailer support device 1 of the second embodiment. The trailer support device 1 of the first embodiment described above is provided with an air cylinder 12 and a rotary cam 4 with a groove cam 6 and a cam follower 20. A pneumatic pressure source is supplied from a compressed air tank mounted on the trailer 100, and the supply pressure is about 0.7 to 0.8 Mpa.

2A includes a support leg 2, a balancer 3, a center clutch 5, a rotating shaft 4, a groove cam 6, a bearing 7, a rotation stop front end 8, and a rotation stop. An end 9 and an air cylinder 12 driven by an air pressure source are included. The state where the support leg 2 of the trailer support device 1 is stored in the lower part of the trailer 100 is shown.

The trailer support device 1 of FIG. 2B slides in the circumferential direction after the rotation shaft 4 supported by the bearing 7 slides in the axial direction of the rotation shaft 4 by driving the air cylinder 12. Then, it shows a state in which it is rotated 90 degrees and is made to stand on the support leg 2. Supplying compressed air causes the rod of the air cylinder 12 to reciprocate.

FIG. 3 is a perspective view of the trailer support device 1 of the third embodiment. As shown in FIG. 3A, the trailer support device 1 includes a support leg 2, a balancer 3, a rotating shaft 4, a center clutch 5, a groove cam 6, a bearing 7, a front clutch 8, The rotation stop rear end 9, an air cylinder 12 driven by an air pressure source, and a cam follower 20 are configured. The difference from the second embodiment is that the center clutch 5, the groove cam 6, and the rotation stop front end 8. It is the shape. The state where the support leg 2 of the trailer support device 1 is stored in the lower part of the trailer 100 is shown.

In the trailer support device 1 shown in FIG. 3B, the rotary shaft 4 supported by the bearing 7 slides in the axial direction of the rotary shaft 4 by the drive of the air cylinder 12 as in the second embodiment. After that, it shows a state in which it is slid in the circumferential direction and rotated 90 degrees to be erected by the support leg 2. Compressed air is supplied to drive the air cylinder 12. When the support leg 2 of FIG. 3A is retracted and the support leg 2 of FIG. 1B is standing, the shaft is fixed by the lock pin 21 so as not to slide.

Similar to the second embodiment, the rotation shaft 4 of the third embodiment is a cylindrical steel material and is supported by a bearing 7. The outer peripheral surface of the rotating shaft 4 is slidable in the axial direction along the inner peripheral surface of the bearing 7, and the outer peripheral surface of the rotating shaft 4 is circumferential along the inner peripheral surface of the bearing 7. It can slide and turn.

FIG. 4 is a perspective view of the trailer support device 1 of the fourth embodiment. 4A, the trailer support device 1 includes a support leg 2, a balancer 3, a rotating shaft 4, a groove cam 6, a bearing 7, a parallel key 10, a key groove 11, The air cylinder 12 driven by the air pressure source and the cam follower 20 are included, and the difference from the second embodiment is that the center clutch 5 is not provided. The state where the support leg 2 of the trailer support device 1 is stored in the lower part of the trailer 100 is shown.

In the trailer support device 1 shown in FIG. 4B, as in the second embodiment, the rotating shaft 4 supported by the bearing 7 slides in the axial direction of the rotating shaft 4 by driving the air cylinder 12. After that, it shows a state in which it is slid in the circumferential direction and rotated 90 degrees to be erected by the support leg 2. Supplying compressed air drives the air cylinder 12. When the support leg 2 of FIG. 4A is retracted and the support leg 2 of FIG. 1B is standing, the lock pin 21 is used to prevent the sliding movement.

Similar to the second embodiment, the rotation shaft 4 of the fourth embodiment is a cylindrical steel material and is supported by a bearing 7. The outer peripheral surface of the rotating shaft 4 is slidable in the axial direction along the inner peripheral surface of the bearing 7, and the outer peripheral surface of the rotating shaft 4 is circumferential along the inner peripheral surface of the bearing 7. It can slide and turn.

FIG. 5 is a component diagram showing the shapes of the center clutch 5, the rear end clutch 5b, and the rotation stop front end 8 of the first and second embodiments.

FIG. 5A is a front view of the center clutch 5, and FIG. 5B is a perspective view of the center clutch 5. The center clutch 5 has a cylindrical shape, and both end surfaces are formed with a plurality of concave and convex portions in the circumferential direction, and are fixed to the rotating shaft 4 with fastening screws.

FIG. 5C is a front view of the rear end clutch 5b, and FIG. 5D is a perspective view of the rear end clutch 5b. The rear end clutch 5b is cylindrical, has a plurality of concave and convex portions on one end face, and is fixed to the rotating shaft 4 with a fastening screw.

FIG. 5E is a front view of the anti-rotation front end 8, and FIG. 5F is a perspective view of the anti-rotation front end 8. The anti-rotation front end 8 is cylindrical and has a plurality of concave and convex portions on one end surface, and the other end surface is fixed to the end surface portion of the bearing 7 by welding. The rear end 9 of rotation stop has the same shape as the front end 8 of rotation stop, but the other end face is welded and fixed to the end face portion of the bearing 7 at a position shifted by 90 degrees.

FIG. 6 is a component diagram showing the shapes of the center clutch 5 and the rotation stop front end 8 according to the third embodiment.

FIG. 6A is a front view of the center clutch 5, and FIG. 6B is a perspective view of the center clutch 5. The center clutch 5 has a cylindrical shape, one end surface is provided with a substantially triangular recess, the other end surface is provided with a substantially rectangular recess, and both end surfaces are formed with a plurality of uneven portions in the circumferential direction. It fixes to the rotating shaft 4 with a clamping screw. The front end 5a (5b) of the center clutch 5 is chamfered with a circular radius of about 5 millimeters. The inclination angle is preferably 45 degrees or less.

FIG. 6C is a front view of the anti-rotation front end 8, and FIG. 5D is a perspective view of the anti-rotation front end 8. The front end 8 of the rotation stop is cylindrical, and one end surface is formed with a plurality of concave and convex portions provided with a substantially trapezoidal concave portion and a spiral inclined surface 8a in the circumferential direction in the circumferential direction. The other end face is fixed by welding.

FIG. 6E is a perspective view showing a state in which the uneven portion of the center clutch 5 and the uneven portion of the rotation stop front end 8 are engaged with each other, and functions as a fitting clutch.

FIG. 7 is an operation explanatory view from the time of retracting the support leg 2 of the trailer support device 1 in the first embodiment to the time of standing.

FIG. 7A shows a state in which the support leg 2 of the trailer support device 1 is stored in the lower part of the trailer 100.

FIG. 7B shows a state in which after the lock pin 21 is released, the rotary shaft 4 is manually slid and slid. Although not shown, the lock pin 21 has a spring inside, and includes a lock mechanism for sliding the rotation shaft 4 to stop the slide movement.

In FIG. 7C, the support leg 2 connected to the rotation shaft 4 slides and rotates by rotating in the direction of the rotation arrow while manually moving the rotation shaft 4 in the direction of the slide arrow.

FIG. 7D shows a state in which the rotation shaft 4 slides in the axial direction, slides and slides in the circumferential direction, completes the rotation by 90 degrees, and then stands on the support leg 2. The operation of the support leg 2 from the standing position to the retracted position may be reversed.

The concavo-convex portion of the center clutch 5 and the concavo-convex portion of the anti-rotation front end 8, or the concavo-convex portion of the center clutch 5 and the concavo-convex portion of the rotation-stop rear end 9 mesh with each other a member formed with a plurality of concavo-convex portions that fit together. It functions as a mating clutch. By sliding the center clutch 5 in the axial direction, the fitting of the rotation stop front end 8 or the rotation stop rear end 9 can be separated. Similarly, the uneven portion of the rear end clutch 5b and the uneven portion of the rotation stop front end 8 function as a fitting clutch.

FIG. 8 is an explanatory view of the operation from the time when the support leg 2 of the trailer support device 1 is retracted to the time of standing in the second embodiment.

FIG. 8A shows a state in which the support leg 2 of the trailer support device 1 is stored in the lower part of the trailer 100.

FIG. 8B shows a state in which after the lock pin 21 is released, the air cylinder 12 is operated to slide the rotational shaft 4 to slide.

In FIG. 8C, the support connected to the rotating shaft 4 by rotating the rotating shaft 4 in the rotating arrow direction while following the groove cam 6 and sliding in the horizontal arrow direction by the operation of the air cylinder 12. The leg 2 slides and rotates.

FIG. 8D shows a state where the rotating shaft 4 slides in the circumferential direction and completes the rotation by 90 degrees, then slides and slides in the axial direction, and is made to stand by the support leg 2.

At this time, the concavo-convex portion on the front end side of the center clutch 5 and the concave portion of the rotation stop front end 8 mesh with each other a member formed with a plurality of concavo-convex portions that fit together and function as a fitting clutch. By functioning as a fitting clutch, a stable load support can be obtained even with a trailer on which a heavy object is mounted when the support leg 2 is standing.

FIG. 9 is an operation explanatory view from the standing time to the storing time of the support leg 2 of the trailer support device 1 in the second embodiment.

In FIG. 9A, the trailer support device 1 shows a state where the trailer support device 1 is made to stand on the support leg 2. At this time, the rotating shaft 4 is fixed by the lock pin 21 so as not to slide.

FIG. 9B shows a state in which after the lock pin 21 is released, the air cylinder 12 is operated to slide the rotational shaft 4 to slide. Since the center clutch 5 slides, the uneven portion on the front end side of the center clutch 5 and the uneven portion on the rotation stop front end 8 can be separated.

In FIG. 9C, the rotation shaft 4 follows the groove cam 6 by the operation of the air cylinder 12 and slides in the horizontal arrow direction while rotating in the direction of the rotation arrow so that the support is connected to the rotation shaft 4. The leg 2 slides and rotates.

FIG. 9D shows a state where the rotating shaft 4 slides in the circumferential direction and completes the rotation by 90 degrees, then slides and slides in the axial direction, and the support leg 2 is retracted. The rotation shaft 4 is fixed by a lock pin 21 so as not to slide.

At this time, the concavo-convex portion on the rear end side of the center clutch 5 and the concavo-convex portion on the rotation-stop rear end 9 mesh with each other, and function as a fitting clutch. The purpose is to hold the support leg 2 safely so that it does not rotate during storage.

FIG. 10 is a sectional view of the rotating shaft 4 and a pattern example of the groove cam 6 in the second embodiment.

10A is a side view of the rotating shaft 4, FIG. 10B is a cutaway view of the rotating shaft 4 along the lines XX and YY, and FIG. 10C is the rotating shaft 4. The example of the pattern of the groove cam 6 provided is shown.

The rotating shaft 4 has a cylindrical shape, and is a cylindrical groove cam in which a concave portion of the groove cam 6 is provided on the outer peripheral surface of the cylinder. Line X1-X2 shows one round (FIG. 10B) in the circumferential direction (rotating direction) of the rotating shaft 4. That is, a development view of the groove cam 6 on the cylindrical side surface of the rotating shaft 4 is shown.

The cam follower 20 is a compact and highly rigid shaft bearing in which a rolling element such as a needle bearing is incorporated. The cam follower 20 is engaged with the groove cam 6 having a predetermined pattern on the cylindrical side surface of the rotating shaft 4. The rotating shaft 4 connected to the air cylinder 12 can slide and rotate following the groove cam 6 engaged with the cam follower 20. That is, the cam follower 20 whose position is fixed follows the trajectory of the groove portions 6A, 6B, and 6C of the groove cam 6, and the cam follower 20 on the opposite side of 180 degrees has the groove portions of the groove cam 6 6D, 6E, and 6F. Follow the trajectory.

FIG. 11 is an explanatory diagram showing the movement of the rotating shaft 4 and the locus of the cam follower 20 in the second embodiment.

More specifically, FIG. 11A shows a state in which the support leg 2 of the trailer support device 1 is stored before the air cylinder 12 is operated.

In FIG. 11B, when the air cylinder 12 is operated, the rotating shaft 4 slides in the horizontal arrow direction following the groove cam 6a engaged with the cam follower 20.

In FIG. 11C, when the air cylinder 12 is operated, the rotation shaft 4 follows the groove cam 6b engaged with the cam follower 20 and slides in the horizontal arrow direction and rotates in the rotation arrow direction.

In FIG. 11 (d), when the air cylinder 12 is actuated, the rotating shaft 4 slides in the horizontal arrow direction following the groove cam 6 c engaged with the cam follower 20.

When the rotation shaft 4 extends from FIG. 11A to FIG. 11D, the support leg 2 rotates 90 degrees while sliding in the horizontal direction. The rotary shaft 4 reciprocates when the air cylinder 12 is operated. However, since the position of the cam follower 20 is fixed, the rotary shaft 4 rotates following the groove cam 6 provided on the cylindrical rotary shaft 4. Is also transmitted.

FIG. 12 is a cross-sectional view of the rotating shaft 4 and the bearing 7 in the second embodiment. Fig.12 (a) is a side view of the trailer support apparatus 1, FIG.12 (b) has shown sectional drawing of an AA line, a BB line, CC line, and DD line.

As shown in the cross-sectional views taken along lines AA, BB, and CC in FIG. 12B, a substantially rectangular groove cam 6B and groove cam 6A are formed on the cylindrical side surface of the rotating shaft 4. ing. The cam follower 20 is connected to the side surface of the bearing 7 so as to be engaged with the groove cam 6.

The rotating shaft 4 is a cylindrical steel material and is pivotally supported by a bearing 7. The outer peripheral surface of the rotating shaft 4 can slide and slide on the inner peripheral surface of the bearing 7, and the outer periphery of the rotating shaft 4. The surface slides on the inner peripheral surface of the bearing 7 and is rotatable. Since the rotating shaft 4 and the bearing 7 have a sliding bearing structure that receives the shaft at the sliding surface, grease lubrication is desirable for lubricating the sliding bearing.

As shown in the sectional view taken along the line D-D in FIG. 12B, a rod air cylinder 22 at both ends is attached to the side surface of the bearing 7, and the lock pin 21 is actuated by driving the air pressure source. The rotation shaft 4 can be fixed by inserting the lock pin 21 into the shaft.

FIG. 13 is an operation explanatory view from the time of retracting the support leg 2 of the trailer support device 1 of the third embodiment to the time of standing.

FIG. 13A shows a state in which the support leg 2 of the trailer support device 1 is stored in the lower part of the trailer 100.

FIG. 13B shows a state in which after the lock pin 21 is released, the air cylinder 12 is operated, and the rotating shaft 4 is slid in the horizontal arrow direction following the groove cam 6.

In FIG. 13 (c), the rotation shaft 4 slides in the horizontal arrow direction by the operation of the air cylinder 12, so that the front end 5a of the center clutch 5 abuts against the inclined surface 8a in a state where it abuts against the rotation stop front end 8. By sliding while sliding, the support leg 2 connected to the rotation shaft 4 slides and rotates in order to rotate in the direction of the rotation arrow.

In FIG. 13 (d), the rotating shaft 4 slides in the circumferential direction and completes 90 ° rotation, then follows the groove cam 6, slides in the axial direction, and is slid by the support leg 2. Show.

At this time, the concavo-convex portion on the front end side of the center clutch 5 and the concavo-convex portion on the front end 8 of the rotation stop mesh with each other, and function as a fitting clutch.

FIG. 14 is an operation explanatory view from the standing time to the storing time of the support leg 2 of the trailer support device 1 in the third embodiment.

In FIG. 14A, the trailer support device 1 shows a state where the trailer support device 1 is made to stand on the support leg 2. At this time, the rotating shaft 4 is fixed by the lock pin 21 so as not to slide.

FIG. 14B shows a state in which after the lock pin 21 is released, the air cylinder 12 is operated to slide the rotational shaft 4 to slide. Since the center clutch 5 follows the groove cam 6 and slides and slides in the axial direction, the uneven portion on the front end side of the center clutch 5 and the uneven portion on the rotation stop front end 8 can be separated.

In FIG. 14C, the rotation shaft 4 follows the groove cam 6 by the operation of the air cylinder 12 and slides in the horizontal arrow direction while rotating in the direction of the rotation arrow, thereby supporting the rotation shaft 4. The leg 2 slides and rotates.

FIG. 14D shows a state where the support shaft 2 is retracted after the rotation shaft 4 slides in the circumferential direction and completes the rotation by 90 degrees and then slides and slides in the axial direction. The rotation shaft 4 is fixed by a lock pin 21 so as not to slide.

At this time, the concave portion on the rear end side of the center clutch 5 and the concavo-convex portion of the rotation stop rear end 9 mesh with each other a member formed with a plurality of concavo-convex portions and function as a fitting clutch. The purpose is to hold the support leg 2 safely so that it does not rotate during storage.

FIG. 15 is an explanatory diagram showing the rotation operation of the center clutch 5 in the third embodiment when the support leg 2 operates from the retracted state to the standing position. FIG. 15A is a side view when the center clutch 5 slides, FIG. 15B is a side view when the center clutch 5 slides and rotates, and FIG. FIG. 16 is a perspective view of FIG.

As shown in FIGS. 15B and 15C, the front end 5a of the center clutch 5 slides in contact with the inclined surface 8a while abutting against the sliding surface 8a of the rotation stop front end 8. The rotating shaft 4 can also rotate by rotating in the direction of the rotation arrow.

FIG. 16 is a sectional view of the rotating shaft 4 and a pattern example of the groove cam 6 in the third embodiment. When the support leg 2 operates from the standing position to the retracted position, the rotating shaft 4 follows the groove cam 6.

16A is a side view of the rotating shaft 4, FIG. 16B is a sectional view taken along the lines XX and YY of the rotating shaft 4, and FIG. The example of the pattern of the groove cam 6 provided is shown.

The rotating shaft 4 has a cylindrical shape, and is a cylindrical groove cam in which a concave portion of the groove cam 6 is provided on the outer peripheral surface of the cylinder. Line X1-X2 shows one round (FIG. 16B) in the circumferential direction (rotating direction) of the rotating shaft 4. That is, a development view of the groove cam 6 on the cylindrical side surface of the rotating shaft 4 is shown.

The cam follower 20 is engaged with the groove cam 6 having a predetermined pattern on the cylindrical side surface of the rotating shaft 4. The rotating shaft 4 connected to the air cylinder 12 can slide and rotate following the groove cam 6 engaged with the cam follower 20. That is, the cam follower 20 whose position is fixed follows the trajectory of the groove portions 6a, 6b, and 6c of the groove cam 6, and the cam follower 20 on the opposite side of 180 degrees has the grooves 6d, 6e, and 6f of the groove cam 6. Follow the trajectory.

FIG. 17 is an explanatory diagram showing the movement of the rotating shaft 4 and the locus of the cam follower 20 in the third embodiment.

FIG. 17A shows a state where the support leg 2 of the trailer support device 1 is standing. When the air cylinder 12 is operated, the rotating shaft 4 slides in the horizontal arrow direction following the groove cam 6a engaged with the cam follower 20.

In FIG. 17B, when the air cylinder 12 is operated, the rotation shaft 4 follows the groove cam 6b engaged with the cam follower 20 and slides in the horizontal arrow direction and rotates in the rotation arrow direction.

In FIG. 17C, when the air cylinder 12 is operated, the rotating shaft 4 slides in the horizontal arrow direction following the groove cam 6c engaged with the cam follower 20.

FIG. 17D shows a state where the operation is completed and the support leg 2 is stored.

The rotation shaft 4 indicates that the support leg 2 rotates 90 degrees while sliding in the horizontal direction from FIG. 17A to FIG. 17D. The rotating shaft 4 moves by operating the air cylinder 12. However, since the position of the cam follower 20 is fixed, the rotating shaft 4 also follows the groove cam 6 provided on the cylindrical rotating shaft 4. It is characteristic that it is transmitted.

FIG. 18 is a cross-sectional view of the rotating shaft 4 and the bearing 7 in the third embodiment. FIG. 18A is a side view of the trailer support device 1, and FIG. 18B is a cross-sectional view taken along lines AA, BB, CC, and DD.

A groove cam 6b and a groove cam 6a are formed on the cylindrical side surface of the rotating shaft 4, as shown in cross-sectional views taken along lines AA, BB, and CC in FIG. The cam follower 20 is connected to the side surface of the bearing 7 so as to be engaged with the groove cam 6.

The rotating shaft 4 is a cylindrical steel material and is pivotally supported by a bearing 7. The outer peripheral surface of the rotating shaft 4 can slide and slide on the inner peripheral surface of the bearing 7, and the outer periphery of the rotating shaft 4. The surface slides on the inner peripheral surface of the bearing 7 and is rotatable. Since the rotating shaft 4 and the bearing 7 have a sliding bearing structure that receives the shaft at the sliding surface, grease lubrication is desirable for lubricating the sliding bearing.

As shown in the sectional view taken along the line D-D in FIG. 18B, a rod air cylinder 22 at both ends is attached to the side surface of the bearing 7, and the lock pin 21 is actuated by driving the air pressure source. The rotation shaft 4 can be fixed by inserting the lock pin 21 into the shaft.

FIG. 19 is an explanatory diagram when the support leg 2 of the trailer support device 1 according to the fourth embodiment is retracted and standing.

FIG. 19A shows a state in which the support leg 2 of the trailer support device 1 is stored in the lower part of the trailer 100.

When the air cylinder 12 is operated after the lock pin 21 is released, the rotating shaft 4 follows the groove cam 6 and rotates while sliding, so that the support leg 2 connected to the rotating shaft 4 slides. And rotate. The operation at the time of storing and standing is the same as in the second embodiment.

FIG. 19 (b) shows a state in which the rotating shaft 4 slides in the circumferential direction and completes 90 ° rotation, and then slides and slides in the axial direction and is made to stand by the support leg 2. The rotation shaft 4 is fixed by a lock pin 21 so as not to slide. The stroke amount of the air cylinder 12 is determined by the stopper ring 24 coming into contact with the stopper 26 or the end surface portion of the bearing 7.

FIG. 20 is a cutaway view of the rotating shaft 4 and the bearing 7 in the fourth embodiment. Fig.20 (a) is a side view of the trailer support apparatus 1, FIG.20 (b) has shown the sectional view of an AA line and a BB line.

As shown in the cutaway view along the lines AA and BB in FIG. 20B, the groove cam 6 is formed on the cylindrical side surface of the rotating shaft 4 as in the second embodiment. The cam follower 20 is attached to the inner peripheral surface of the bearing 7 so as to engage with the groove cam 6. Similar to the second embodiment, the rotation shaft 4 can slide and rotate by following the groove cam 6 having a predetermined pattern on the cylindrical side surface of the rotation shaft 4.

A convex-shaped parallel key 10 is fixed to the side surface of the rotation shaft 4 with a bolt, and a concave-shaped key groove 11 is provided on the inner peripheral surface of the bearing 7. The parallel key 10 and the key groove 11 mesh with each other formed with a plurality of concave and convex portions that fit together, and function as a fitting clutch. It is intended to hold the support leg 2 so as not to rotate during storage and standing.

The rotating shaft 4 is a cylindrical steel material and is pivotally supported by a bearing 7. The outer peripheral surface of the rotating shaft 4 can slide and slide on the inner peripheral surface of the bearing 7, and the outer periphery of the rotating shaft 4. The surface slides on the inner peripheral surface of the bearing 7 and is rotatable.

FIG. 21 is a main part configuration diagram of the air cylinder 12 and the rotating shaft 4 in the second embodiment. The third embodiment and the fourth embodiment have the same structure.

FIG. 21A is a main part configuration diagram of an embodiment in which the rod of the air cylinder 12 is connected to the rotation shaft 4 of the trailer support device 1. The rod fixing pin 13 is inserted into the connecting hole of the rod end 14 and the rod of the air cylinder 12 is connected at the axial center position inside the cylinder of the rotating shaft 4. When the air cylinder 12 is operated, the rotating shaft 4 slides and rotates 90 degrees. At this time, the rod of the air cylinder 12 also rotates 90 degrees.

The second to fourth embodiments are most characterized in that the support leg 2 of the trailer support device 1 can be rotated about the axis of the rotation shaft 4 by driving the air cylinder 12.

When the rod end 14 is a floating joint, it is possible to absorb misalignment and insufficient parallelism between the rotating shaft 4 and the air cylinder 12. By using a floating joint, it is not necessary to align the shaft with high accuracy, and it is possible to expect effects such as preventing damage to the cylinder packing and extending the life of the actuated body.

FIG. 21B is a configuration diagram of a main part of another embodiment in which the rod of the air cylinder 12 and the rotating shaft 4 are engaged. When the air cylinder 12 is actuated, the rod end disk 16 engages with the engaging portion 17a and the engaging portion 17b to transmit the reciprocating motion. The rotating shaft 4 follows the groove cam 6 and slides 90 degrees. Rotate.

In this other embodiment, the air cylinder 12 adopts a non-rotating rod type, and the rod end disk 16 does not rotate during operation. Since the rod end disk 16 and the locking portion 17a and the locking portion 17b perform a smooth motion, grease lubrication from the grease greasing hole 19 is desirable.

FIG. 22 shows a state where a tiltable grounding portion 32 is mounted under the support leg 2 in the second embodiment. The same structure of the grounding portion 32 can be adopted in the first embodiment and the third embodiment.

The height can be adjusted by a feed screw mechanism having a feed screw 30 under the support leg 2, and a grounding portion 32 having a spherical ball 31 is attached to the lower end of the feed screw 30. Even if there is an inclination angle, the followability of the road surface is well inclined.

FIG. 23 is a side view showing a state in which the trailer support device 1 according to the second embodiment is attached to the lower portion of the trailer 100. FIG. 23A shows a state in which the support leg 2 is stored in the lower portion of the trailer 100, and FIG. 23B shows a state in which the trailer 100 is supported with the support leg 2 standing. In the first embodiment and the third embodiment, the trailer support device 1 can be similarly attached to the lower portion of the trailer 100.

The trailer support device 1 is attached to both lower portions on the front end side of the trailer 100 with a plurality of bolts via mounting plates 25. When the support leg 2 is stored or used, the lock pin 21 can be inserted into the lock pin insertion hole 23 to be locked.

FIG. 24 is an explanatory view sequentially showing a procedure for separating the tractor 101 and the trailer 100 using the trailer support device 1 according to the present invention.

FIG. 24A shows a normal state in which the trailer 100 is transferred by the tractor 101, and the support leg 2 of the trailer support device 1 is horizontal with respect to the trailer 100 and is stored inside the width of the trailer 100. It is in the state.

FIG. 24B shows a state in which the tractor 21 is stopped and the support leg 2 of the trailer support device 1 is rotated 90 degrees to support the front end side of the trailer 100. At this time, since the support leg 2 is self-supporting outside the width of the trailer 100, there is no obstacle even if there is equipment under the trailer 100. By inserting the lock pin 21 into the lock pin insertion hole 23, the lowered position of the support leg 2 is determined and held.

By lowering the overall height of the tractor 101, the joint height H of the rear connecting portion of the tractor 101 is lowered. Therefore, the support leg 2 of the trailer support device 1 can be grounded to the ground, and the tractor 101 can be separated from the trailer 100.

If the tractor 101 and the trailer 100 are separated, as shown in FIG. 21 (c), the trailer 100 can be lowered by moving the tractor 101 forward. That is, when the trailer 100 is not connected to the tractor 101, the support leg 2 supports the load on the front end side of the trailer 100 and holds it in a horizontal state. When the trailer 100 is connected to the tractor 101, the reverse operation may be performed.

FIG. 25 is a perspective view of the trailer support device 1 according to the present invention attached to the vehicle container 102. In this embodiment, the vehicle container 102 can be supported by attaching it to the lower part of the vehicle container 102.

DESCRIPTION OF SYMBOLS 1 Trailer support apparatus 2 Support leg 3 Balancer 4 Rotating shaft 5 Center clutch 5b Rear end clutch 6 Groove cam 7 Bearing 8 Anti-rotation front end 9 Anti-rotation rear end 10 Parallel key 11 Key groove 12 Air cylinder 14 Rod end 16 Rod end circle Plate 17 Locking portion 20 Cam follower 21 Lock pin 22 Both ends rod air cylinder 24 Stopper ring 25 Connecting plate 30 Feed screw 32 Grounding portion 100 Trailer 101 Tractor 102 Vehicle container H Joint portion height

Claims (4)

A trailer support device capable of supporting the front end side of a trailer that is a towed vehicle, a cylindrical center clutch provided on a cylindrical rotating shaft, a bearing, and a rotation stopper provided on an end surface portion of the bearing, A support leg, and a fitting clutch function including a member formed by a plurality of concavo-convex portions that can engage and disengage the both ends of the center clutch and the rotation stopper. A trailer support device characterized in that the bearing that supports the shaft is a slide bearing that is slidably supported, and the support leg connected to the rotation shaft is manually slidable and rotatable. The trailer support device according to claim 1, comprising an air cylinder driven by an air pressure source, a groove cam and a cam follower on an outer peripheral surface of the rotating shaft, and the rod of the air cylinder and the rotating shaft. Are connected by a rod end, and the cam follower and the groove cam are engaged, and the rotation shaft is moved by following the rotation by driving an air cylinder, whereby the support leg connected to the rotation shaft is slid and rotated. A trailer support device characterized by being made possible. 3. The trailer support device according to claim 2, wherein when the support leg is retracted from a stand-up position, the front end of the center clutch slides in contact with the inclined surface with the front end abutting against the rotation stop front end, and the support When the leg is stowed from the stand-up position, the cam follower and the groove cam are engaged, and the support shaft connected to the rotation shaft can be slid and rotated by following the rotation shaft. Trailer support device characterized by that. 4. The trailer support device according to claim 2 or 3, wherein the air cylinder adopts a rod detent type, engages a rod end disk and a locking portion, and rotates the rod of the air cylinder. A trailer support device characterized in that the support leg connected to the rotation shaft can be slid and rotated without being moved.

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