JP4353777B2 - Shaft trailer lifting device for marine container transportation - Google Patents

Description

  The present invention relates to a chassis trailer lifting device used for stacking two (or three) stages of empty (empty) chassis trailers for marine container transportation.

  Shaft trailers that transport marine containers on land are large because they correspond to the size of marine containers. For example, if the sea container is 20 feet, the chassis trailer is for 20 feet, and if the sea container is 40 feet, the chassis trailer is for 40 feet. Shaft trailers are towed by a tractor, but usually there are more chaat trailers than tractors in a parking lot, so it is a serious problem to secure a parking space for the shoat trailer.

In order to solve the above problems, the chassis racer itself has a support leg cradle in the front part and a wheel cradle in the rear part for stacking, and a fork pocket for lifting with a forklift is installed. A structure having a structure for reducing the parking space by allowing two or three stages of chassis trailers to be stacked in use is known. Then, when stacking, a lifting U-shaped lifting tool for inserting a forklift nail is provided on the web of the main frame of the chassis trailer. It has been known that a forklift claw is inserted into the forklift and lifted up (see Patent Document 1). However, this is a structure in which the lifting tool is rotated up and down to put the use state into the retracted state, but there is not only a problem in fixing the position in the vertical state before lifting with the forklift or in the horizontal state when retracting. There is a problem in that it is structurally unstable.
Utility Model Registration No. 2529927

  The present invention further improves the chassis trailer lifting device provided in the chassis trailer itself so that the standing state before inserting the forklift pawl when using the lifting device and the horizontal state when not using can be reliably maintained. An object of the present invention is to provide a lifting device that is structurally strong.

In view of the above problems, the present invention provides a lifting member position regulating device that holds a lifting member having an upside down inverted U shape in a vertical state when lifting with a forklift or the like or a horizontal state during storage. It is configured by simple means. That is, the present invention
“A chassis lifter lifting device for shipping marine containers ,
A lifting member that has an inverted U-shape and can be changed between a vertical position during lifting and a storage position in a substantially horizontal state ;
A lifting member support bar fixed horizontally to the lower part of the lifting member and supported by a vertically elongated groove provided in a pair of brackets fixed to the outer surface of the main frame of the chassis trailer ,
A support bar regulating plate having a side vertical surface and a bottom inclined surface is fixed to both end portions of the lifting member support rod, and a position regulating plate having a vertical guide surface is fixed to the pair of brackets. Has been
When the lifting member is in a vertical position, a side vertical surface of the support bar regulating plate and a vertical guide surface of the position regulating plate come into contact with each other so that the lifting member is held in the vertical position, and the lifting member When the storage position is set to the storage position, the bottom inclined surface of the support bar restriction plate and the vertical guide surface of the position restriction plate come into contact with each other, and the lifting member is held in the storage position. ''
This is a suspension lifter that is characterized by this.
Here, it is preferable that the lifting member is rotatable so as to change a vertical position and a retracted position when the lifting member support bar is at the upper end of the longitudinal groove.
Further, it is preferable that the lifting member support rod is always urged downward by a spring having a lower end attached to the outer surface of the main frame .

In the present invention, the lifting member support rod 13 is fixed to the lower part of the inverted U-shaped lifting member 14 in the lifting device 9 (the reference numeral is in the drawings described later), and the side vertical surfaces 15b and The support bar restricting plate 15 having the bottom inclined surface 15a is fixed, and the position restricting plate 16 having the vertical guide surface 16a is fixed to the pair of brackets 12. When the lifting device 9 is used, that is, when the lifting member 14 is lifted by a forklift or the like with the lifting member 14 in the vertical position, the side vertical surface 15b of the support bar regulating plate 15 abuts on the vertical guide surface 16a of the position regulating plate 16. Thus, the lifting member 14 is securely held in the vertical position. And in the retracted position when not in use, the bottom inclined surface 15a of the support bar restricting plate 15 comes into contact with the vertical guide surface 16a of the position restricting plate 16, and the lifting member 14 is maintained in a horizontal state.
As described above, when the lifting device 9 is used, the inverted U-shaped lifting member 14 is lifted up along the vertically long groove 20 and then rotated to stand, and after use , the lifting device 9 is kept horizontal so as not to obstruct the tire. Since it can be reliably stored if it is lowered and lowered, this makes it easy to stack two or three stages, and increases the efficiency when the container yard is transported to an empty vehicle.

  The lifting device 9 is used to stack the chassis trailers in multiple stages. When the lifting device 9 is manually raised upward, the bottom inclined surface 15a of the first support rod regulating plate 15 is the vertical guide surface of the position regulating plate 16. Ascended smoothly by being guided by 16a. Further, the vehicle is stored in a horizontal state when traveling, but when the lifting member 14 is lifted, that is, while the support bar 13 is on the top of the longitudinal groove 20, it is rotated laterally, and then along the vertical guide surface 16a of the position regulating plate 16. Since the inclined surface 15a is lowered, the lifting device can never rotate in a state where the support bar 13 is lowered at the lowermost part of the vertically long groove 20.

  Since the inclined surface 15a of the support bar restricting plate 15 is in contact with the vertical surface 16a of the position restricting plate 16, and further pulled downward by the spring 18, there is no backlash at the time of travel and the housing is reliably stored.

  Furthermore, since the lifting member support bar 13 is moved smoothly and accurately by the vertically long groove 20 provided in the bracket 12, the standing operation and the tilting operation can be performed extremely stably.

FIG. 1 is a side view of a 20-foot container chassis trailer equipped with the chassis trailer lifting device of the present invention. FIG. 2 is also a plan view.

  The chassis trailer has a main frame 1 made of two I-shaped steels and a horizontal beam 2 on which the marine container is placed before and after the two main frames 1. A rear front wheel 3a and a rear wheel 3b are attached to the rear of the main frame 1, and a king pin 5 for connecting a landing gear 4 and a tractor (not shown) is attached to the front. At the ends of the pair of transverse beams 2 projecting laterally from the main frame 1, there are provided twist lock devices 6 that engage with corner fittings provided at the bottom four corners of the marine container. Further, side bumpers 7 are attached to both sides of the main frame 1 to prevent danger from the chassis rail.

  Now, a lifting device 9 that constitutes a main part of the present invention will be described with reference to FIGS. As described with reference to FIG. 1, a total of four lifting devices 9 are provided in pairs in the front-rear direction of the trailer at the front-rear position of the center of gravity G of the entire chassis trailer.

The lifting device 9 is provided on a lifting member support bar 13 passing through a longitudinal groove 20 provided in a pair of substantially trapezoidal brackets 12 (FIG. 4) fixed to the outer surface of the main frame 1 via a reinforcing plate 14a. A lifting member 14 having an inverted U-shape fixed thereto is used as a main member.

  Both ends of the support bar 13 pass through the vertically long groove 20 of the bracket 12. A position restricting plate 16 comprising an inclined portion 16b and a vertical guide surface 16a is fixed to the side surface of the bracket 12.

As described above, at both side ends of the support bar 13, there are position restricting plates 16 for restricting the vertical position when the inverted U-shaped lifting member 14 is used and the horizontal position when it is not used. A support bar restricting plate 15 is fixed to the lower end portion of the support bar 13, and the lower end of the restricting plate 15 is inclined at the bottom to contact the vertical guide surface 16 a of the position restricting plate 16 when the lifting member 14 is held horizontally. It has a surface 15a . The inclined surface 15a rotates approximately 90 ° to the side when retracted, abuts against the vertical guide surface 16a (FIG. 4) of the position restricting plate 16 and stops the lifting member 14 at a substantially horizontal position. Etc. (FIG. 7).

Further, in use, the inverted U-shaped lifting member 14 is gradually pushed upward in the retracted position as shown in FIG. 5 and is lifted upward together with the support bar 13, and after the support bar 13 reaches the upper end of the longitudinal groove 20. The bottom inclined surface 15a is turned downward by rotating upward. Then, the support bar 13 descends by its own weight along the longitudinal groove 20, and the side vertical surface 15b of the support bar restricting plate 15 comes into contact with the vertical guide surface 16a of the position restricting plate 16, and the rotation is completely stopped there. The vertical position is maintained and the forklift pawl is easily inserted (FIG. 4).

  The upper end of a spring 18 is attached to a spring mounting member 17 at the center of the support bar 13, and the lower end of the spring is supported by a fixture 19 provided at the lower side of the main frame 1. The upper member 9 is urged downward. The longitudinal groove 20 in which the end of the support bar 13 freely moves up and down is provided in the bracket 12, whereby the support bar 13 rises along the longitudinal groove 20 when it is raised, and at the same time, the bottom inclined surface 15 a of the support bar regulating plate 15. Is guided by the vertical guide surface 16a of the position restricting plate 16 so that it can be moved to the upper use position very smoothly.

  A tire platform 8 is attached to each chassis racer outside the web of the main frame 1 at the front position of the rear front wheel 3a and the front position of the rear wheel 3b (FIG. 9). As shown in FIG. 9, the tire mount 8 includes a central horizontal portion 8a and inclined portions 8b and 8c before and after the horizontal portion 8a.

  As shown in FIG. 9, the tire mount 8 is supported by two reinforcing plates 10 welded to the side of the main frame 1, and the edge of the tire mount 8 itself is also welded to the main frame 1. As shown in FIG. 10, a side reinforcing plate 11 having a slope 11a and a horizontal surface 11b is welded between the upper surface of the horizontal portion 8a of the tire mount 8 and the upper flange 1a of the main frame 1. Therefore, the wheel is placed on the tire platform 8 and the side reinforcing plate 11 so as not to be displaced.

  Referring back to FIG. 1, reference numeral 21 denotes a landing gear platform, and when the chassis trailer is stacked, the landing gear 4 leg rides on this, and the front part of the chassis trailer is stably supported. FIG. 11 shows details of the landing gear platform 21. The landing gear platform 21 is provided on the front side of the main frame 1. The platform 21 includes a front plate 22, a rear plate 23 and a horizontal base plate 24 which are welded to the side of the main frame 1. The front plate 22 is constructed as shown in FIG. 12 and the rear plate 23 is constructed as shown in FIG. 13. The horizontal plate 24 is welded to the horizontal portions 25 and 26 of the front plate 22 and the rear plate 23 as shown in FIG. The lower surface is welded.

  FIG. 15 shows a state where three chassis trailers are stacked using the lifting device 9 configured as described above. That is, the rear two-axle wheels of the second container chassis are on the tire platform 8 before and after the lowermost chassis trailer, and the landing gear 4 of the second chassisy trailer is the front part of the lowermost chassis trailer. It is placed on the platform 21 provided in the above and is stably supported. Similarly, the third stage is placed on top of the second stage.

(Function)
When the chassis trailer is mounted, the inverted U-shaped lifting member 14 is manually lifted upward in the retracted posture against the spring force of the spring 18.

  When the lifting member support bar 13 reaches the uppermost portion of the vertically long groove 20, the lifting member 14 becomes free and is rotated upward. Then, it stops when it hits the flange end 1a of the main frame 1, but at this position, the support bar 13 is slightly lowered by its own weight along the longitudinal groove 20, and the spring 18 also acts and pulls downward so that it does not fall down. In this state, the forklift pawl is passed through the lifting member 14 and lifted.

Next, after lifting and stacking the chassis rail, the forklift pawl is pulled out, the lifting member 14 is lifted up slightly, the lifting member 14 is tilted sideways, and the bottom inclined surface 15a of the support bar restricting plate 15 is moved to the position restricting plate 16 The lifting member support bar 13 is lowered along the vertical guide surface 16a and stops at the position of the lower end of the longitudinal groove 20, but in this state, the inclined surface 15a and the vertical guide surface 16a are in contact with each other and the spring 18 is directed downward. The position is stabilized by the tensile action.

  Then, the rear front wheel 3a and the rear wheel 3b are placed on the pair of left and right mounting bases 8 and at the same time, the front portion is placed on the landing gear mounting base 21 with the leg portions of the landing gear 4. This is the end of the first installation.

1 is a side view of a chassis trailer provided with a lifting device according to the present invention. FIG. The front view of the lifting apparatus 9. FIG. FIG. 4 is a right side view of FIG. 3. The figure which shows the state at the time of lifting of the lifting member. The figure which shows the state at the time of rotation of the lifting member. The figure which shows the state at the time of storing of the lifting member. The side view of a tire mount. It is an exploded view of a platform, (a) is a top view, (b) is an end elevation. It is a side view of a tire mounting stand, and is AA arrow line view of FIG. A side view of a landing gear platform. The side view which shows the front board of a landing gear mounting stand. The side view which shows the rear board of a landing gear mounting stand. FIG. 12 is an AA arrow view of FIG. 11. The side view of the state which piled up the chassis lore 3 steps.

Explanation of symbols

1 Main frame 1a (flange) end 2 Cross beam 3a Rear front wheel
3b Later wheel 4 Landing gear 5 Kingpin 6 Twist lock device 7 Bumper 8 Tire mount
8a Central horizontal part 8b Inclined surface 9 Lifting device 10 Reinforcing plate
11 Side reinforcement plate 12 Bracket
13 Lifting member support bar 13a Inclined surface
14 Lifting member 15 Support bar regulating plate
15a (support bars regulating plate) the bottom inclined surface 15b (of the supporting bars regulating plate) perpendicular wall
16 Position restriction plate
16a Vertical guide surface (of position restriction plate) 16b Inclined surface (of position restriction plate)
17 Spring support member 18 Spring
19 Fixing 20 Longitudinal groove
21 Landing gear platform 22 Front plate
23 Rear plate 24 Horizontal base plate
25 Horizontal part 26 Horizontal part

Claims (3)

Shaft trailer lifting device for shipping sea containers ,
A lifting member that has an inverted U-shape and can be changed between a vertical position during lifting and a storage position in a substantially horizontal state ;
A lifting member support bar supported in a vertically movable manner in a longitudinal groove provided in a pair of brackets fixed horizontally to the lower portion of the lifting member and fixed to the outer surface of the main frame of the chassis rail ,
A support bar regulating plate having a side vertical surface and a bottom inclined surface is fixed to both end portions of the lifting member support rod, and a position regulating plate having a vertical guide surface is fixed to the pair of brackets. Has been
When the lifting member is in a vertical position, a side vertical surface of the support bar regulating plate and a vertical guide surface of the position regulating plate come into contact with each other so that the lifting member is held in the vertical position, and the lifting member When the storage position is set, the bottom inclined surface of the support bar restricting plate and the vertical guide surface of the position restricting plate come into contact with each other and the lifting member is held in the retracted position. . The suspension lifter according to claim 1, wherein the lifting member is rotatable so as to change a vertical position and a retracted position when the lifting member support bar is at an upper end portion of the longitudinal groove . The suspension lifter according to claim 1, wherein the lifting member support bar is always urged downward by a spring having a lower end attached to an outer surface of the main frame .

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