KR20100117292A - Folding type landing apparatus for semi-trailer - Google Patents

Abstract

PURPOSE: A folding type landing device for a semi-trailer is provided to rapidly perform a landing work by using a rotary leg only when landing. CONSTITUTION: A folding type landing device for a semi-trailer comprises fixed legs(110), rotary legs(120), a horizontal shaft(130), a drive cylinder(140), and a locking cylinder(150). The fixed legs are vertically installed in mounting brackets(2a). Locking brackets(111,113) with locking holes are formed in the fixed legs. The rotary legs are rotatably coupled to the bottoms of the fixed legs. The horizontal shaft connects the rotary legs. The drive cylinder is hinged on the mounting brackets and rotates the rotary legs. The locking cylinder is located between the rotary legs and is fixed to the mounting brackets.

Description

Folding type landing apparatus for semi-trailer

The present invention relates to a folding type landing device for a semi-trailer, and more particularly, to a folding type landing device for a semi-trailer that can be used by folding a rotating leg on a side of a fixed leg and rotating the rotating leg only when landing. .

In general, a trailer is a vehicle consisting of a towed portion and a towed portion, and is used to transport cargo and containers. Although it is generally referred to as a trailer including a trailer that is towed and a tractor that is towed, strictly speaking, the towed portion is a trailer and the towing portion is a tractor.

Depending on the connection between the tractor and the trailer, the full trailer and the semi-trailer are divided, and the full trailer supports the weight of the container only by the trailer. As a result, the tractor simply tow the trailer, and the hooks need to be hooked to the rear of the body, making the structure simple and free of brakes.

Semi-trailers carry part of the trailer and loading weight directly on the tractor. Therefore, since the tractor must have the support and the traction, the rear wheels are usually doubled, and the connector is installed to facilitate relative movement, connection and disconnection with the trailer.

In general, the trailer refers to a semi-trailer, and the semi-trailer will be described below.

On both sides of the tip of the semi-trailer, a landing gear with a double reduction gear structure is mounted to support the semi-trailer with the container against the ground.

Typically, the driver separates the semi-trailer from the tractor at a place such as a dock that loads or ships cargo or the like on the semi-trailer. In addition, the semi-trailer is recoupled with other tractors after shipment or shipment is complete.

When detaching the semi trailer from the tractor, the driver manually rotates the crank handle to extend (lower) the leg portion of the landing gear until it reaches the ground. At this time, in the process of lowering the leg of the landing gear, the landing gear is initially operated in the high speed state, and later the landing gear is operated in the low speed state.

The driver separates the jaws from the kingpin to separate the tractor from the semi-trailer to separate the tractor from the semi-trailer.

After finishing work on a semi-trailer where cargo is shipped or shipped, the driver reverses the tractor, relocates it under the semi-trailer and connects the jaw to the kingpin.

The conventional landing gear device 10 is mounted on both sides of the tip portion of the semi-trailer chassis 2 'of the semi-trailer 2, which is coupled / detached to the tractor 1 and loaded with a container 3 thereon, that is, landing gear mounting. A rectangular fixing leg 11 is fixed to the bracket 2a by bolts B vertically by the flange plate P. And a gear box (not shown) having an input shaft is installed on the outer side of the fixed leg 11, the rotational force of the gear box is installed in the fixed leg 11 through a series of gears and bevel gears (not shown) It is configured to be delivered to a vertical shaft (not shown). The lifting leg 13 is screwed to the vertical shaft so as to be able to move up and down.

In the conventional landing gear device configured as described above, when the crank handle (not shown) is inserted into the input shaft of the gear box and turned manually, the rotational force of the gear box is decelerated and transmitted to the vertical shaft, and the lifting leg 13 is decelerated. Ascend and descend.

However, the conventional landing gear device is complicated and heavy in overall configuration, and the crank handle is coupled to the input shaft of the gearbox, and the crank handle has to be manually rotated dozens of times, so that the landing operation is too slow and time-consuming. The work is cumbersome and difficult, and the structure is complicated, there is a problem that the manufacturing cost increases.

The present invention has been made in view of the above-mentioned problems, and an object thereof is to provide a folding type landing device of a semi-trailer whose overall configuration is simple and easy to operate, and in which the landing operation can be performed quickly.

In order to achieve the above object, the folding landing device of a semi-trailer according to an embodiment of the present invention is separated or combined from a tractor by an operation of a trailer air suspension (airbag), and a container semi-trailer in which a container is loaded on the top. Applied, it is an automatic structure.

That is, the folding landing device of the semi-trailer according to an embodiment of the present invention is a vertically fixed to the mounting bracket formed on both sides of the front end portion of the semi-trailer chassis, a pair of locking brackets having a locking hole formed on one side Fixing legs of; A pair of rotation legs in which a hinge is formed at one side and a locking bracket having a locking hole is formed at the other side to be rotatably coupled to the lower portion of the fixing leg; A horizontal shaft for horizontally connecting the pair of pivot legs; A drive cylinder hinged to the mounting bracket and a rod connected to the horizontal shaft to push or pull the horizontal shaft to rotate the pivoting leg about the hinge; And a locking cylinder fixedly installed between the pair of fixing legs 110 to lock the locking bracket of the fixing leg and the locking bracket of the pivoting leg.

The rod of the locking cylinder is selectively penetrated into the locking hole of the fixing leg and the locking hole of the rotating leg to fix the position of the rotating leg.

The mounting bracket is provided with a control unit provided with an operation button, the fixing leg is provided with a sensor for detecting the rotational position of the rotation leg, the locking cylinder is automatically operated by the sensor.

On the other hand, the folding landing device of a semi-trailer according to another embodiment of the present invention is a manual structure that is applied to a semi-trailer for a container that is separated or coupled from the tractor by the operation of the trailer air suspension, the container is loaded on the top.

That is, the folding landing device of the semi-trailer according to another embodiment of the present invention is fixed to the mounting bracket formed on both sides of the front end portion of the semi-trailer chassis, the pair is formed with a locking bracket having a locking hole on one side Fixing legs of; A pair of rotation legs in which a hinge is formed at one side and a locking bracket having a locking hole is formed at the other side to be rotatably coupled to the lower portion of the fixing leg; A horizontal shaft for horizontally connecting the pair of pivot legs; A winder unit for pivoting the pivoting leg about the hinge by pushing or pulling the horizontal shaft; And a leg locking unit fixedly installed between the pair of fixing legs to lock the locking bracket of the fixing leg and the locking bracket of the pivoting leg.

The winder unit is a ratchet gear that is rotatably installed in one direction inside the fixing leg; A handle connected to the center shaft of the ratchet gear and exposed to the outside of the fixing leg; A stopper installed inside the leg to elastically contact the ratchet gear; A tension roller installed on the mounting bracket; And a wire connected to the center shaft of the ratchet gear and the horizontal shaft while being supported by the tension roller, and wound around the center shaft.

The leg locking unit is located between the fixing legs X-shaped link is installed rotatably around the hinge to the mounting bracket; A handle connected to an upper side of the X-shaped link to operate the X-shaped link; And a locking bar connected to both lower sides of the X-shaped link and selectively penetrating into the locking hole of the fixing leg and the locking hole of the rotating leg to fix the position of the rotating leg.

When the X-shaped link is rotated by pushing the handle, the locking bar connected to both the lower ends of the X-shaped link is selectively penetrated into the locking hole of the fixing leg and the locking hole of the pivoting leg to fix the position of the pivoting leg. .

As described above, according to the present invention, the leg is divided into two parts, a fixed leg and a rotating leg, and in general, the rotating leg is folded on the side of the fixed leg, and the rotating leg can be rotated when necessary. By being configured, the landing operation is very easy and convenient, there is an effect that can perform the landing operation quickly.

In addition, the overall configuration is very simple, easy to install, manufacturing cost is reduced, as well as the overall load is significantly reduced, there is an effect of fuel saving according to the operation.

Hereinafter, with reference to the accompanying drawings will be described in detail a folding type landing device of a semi-trailer according to an embodiment of the present invention.

2 is a perspective view showing a folding landing device of the semi-trailer according to an embodiment of the present invention, Figure 3 is a folding landing device of the semi-trailer according to an embodiment of the present invention, showing a folding state of the landing device 4 is a side view showing a folding state of the landing apparatus in the folding type landing device of a semi trailer according to an embodiment of the present invention, and FIG. 5 is a folding type landing of the semi trailer according to an embodiment of the present invention. In the device, a front view showing an unfolding state of the landing device, and FIG. 6 is a side view showing an unfolding state of the landing device in the folding type landing device of a semi-trailer according to an embodiment of the present invention.

Usually, the semi-trailer 2 is separated from the tractor 1 at a place such as a dock for loading or shipping the container 3, etc., and the semi-trailer 2 is reconnected with other tractors after the shipment or shipment is completed. In this case, the landing device 100 of the present invention serves to support the semi-trailer 2 when the semi-trailer 2 and the tractor 1 are coupled / separated.

In the semi-trailer folding type landing apparatus 100 according to an embodiment of the present invention, the semi-trailer 2 may be separated from the tractor 1 by the operation of the trailer air suspension 1a. The description is limited. The trailer air suspension (1a) is a device that supports the vehicle body elastically by using air, so a detailed description thereof will be omitted. For convenience of description, the semi-trailer chassis 2 'of the semi-trailer 2 is provided. And it will be described that the landing device 100 of the present invention is installed on the mounting bracket (2a).

2 to 6, the folding type landing device 100 of the semi-trailer according to an embodiment of the present invention is vertically fixed to the mounting bracket 2a formed on both sides of the tip portion of the semi-trailer chassis 2 '. A pair of fixing legs 110 installed and having a locking bracket 111 having a locking hole 111a on one side thereof; A pair of pivoting legs 120 having a hinge 123 formed on one side thereof and a locking bracket 121 having a locking hole 121a formed on the other side thereof so as to be rotatably coupled to a lower portion of the fixing leg 110. ; A horizontal shaft 130 horizontally connecting the pair of pivot legs 120; The body 140a is hinged to the mounting bracket 2a and the rod 140b is connected to the horizontal shaft 130 to push or pull the horizontal shaft 130 to center the hinge 123. A driving cylinder 140 that rotates the rotation leg 120 by using; And a locking cylinder 150 fixedly installed between the pair of fixing legs 110 to lock the locking bracket 111 of the fixing leg 110 and the locking bracket 121 of the pivoting leg 120. Equipped.

Hereinafter, the configuration of the semi-trailer folding type landing device 100 according to an embodiment of the present invention will be described in more detail.

Folding type landing device 100 of the semi-trailer according to an embodiment of the present invention is an automatic structure, a pair of fixing legs 110 are fixed to the mounting bracket (2a) at a predetermined interval from each other vertically, welding or Alternatively, the bolt B may be fixed to the flange P.

The fixing leg 110 is formed of a metal member having a rectangular case structure, and locking brackets 111 and 113 having locking holes 111a and 113a are formed at one lower side thereof.

The pair of rotation legs 120 are rotated during the landing operation to be connected to the fixed leg 110, the hinge 123 is formed on the upper side of the rotation leg 120 and the rotation leg 120 A locking bracket 121 having a locking hole 121a is formed at the other side, and a shoe 125 contacting the ground is formed at a lower portion of the rotation leg 120.

As shown in FIG. 3, stepped grooves 110a and corresponding stepped portions 120a are formed at the ends of the fixed legs 110 and the rotational legs 120, respectively, so that the fixed legs 110 and the fixed legs 110 are formed. Coupling portion of the rotation leg 120 may be more firmly maintained.

The horizontal shaft 130 is a rod connecting the pair of rotation legs 120 to each other horizontally, the rod 140b of the drive cylinder 140 is hinged to the horizontal shaft 130. The body 140a of the drive cylinder 140 is hinged to the mounting bracket 2a. The rod 140b of the driving cylinder 140 rotates the pivoting leg 120 about the hinge H by pushing or pulling the horizontal shaft 130.

The locking cylinder 150 is located between the pair of rotation legs 120 in a two-stage cylinder structure and is fixedly installed on the mounting bracket 2a. The rods 151 and 151 'of the locking cylinder 150 are installed. Is selectively penetrated into the locking holes 111a and 113a of the fixing leg 110 and the locking hole 121a of the pivoting leg 120 to fix the position of the pivoting leg 120.

And the reference numeral bracket (B1) serves to fix the locking cylinder 150 between the fixing leg (110).

The operation of the folding type landing device for a semi-trailer according to the example of the present invention configured as described above will be described.

Remove the semi-trailer 2 from the tractor 1 at a place such as a dock that ships or ships containers 3, etc., and re-engages the semi-trailer 2 with another tractor after shipment or shipment is complete. In this case, the landing device 100 of the present invention serves to support the semi-trailer 2 upward when the semi-trailer 2 and the tractor 1 are coupled / separated.

First, referring to the process of separating the semi trailer 2 from the tractor 1, the driver supports the semi trailer 2 upward by using the trailer air suspension 1a.

When the driving cylinder 140 is operated in the state in which the rotation leg 120 is folded (FIGS. 3 and 4), the body 140a of the driving cylinder 140 moves around the hinge H. In the state connected to 2a), the rod 140b pushes and pushes the horizontal shaft 130. The pivoting leg 220 is pivoted about the hinge 123 to be positioned in line with the fixed leg 110 (unfolded). At the same time, the rods 151 and 151 ′ of the locking cylinder 150 are locked in the locking holes 111a and 113a of the fixed leg 110 and the locking holes of the pivoting leg 120 in both directions (arrow directions). 121a) is selectively penetrated into and fixed to the position of the rotational leg 120 (see FIGS. 5 and 6). In this state, the fixed leg 110 and the rotating leg 120 are integrally connected and fixed, and the shoe 125 of the rotating leg 120 does not touch the ground and maintains a predetermined distance from the ground. The trailer air suspension 1a (see FIG. 1) is then operated again so that the shoe 125 of the pivoting leg 120 touches the ground, where the landing device 100 supports the semi-trailer 2. The driver then advances the tractor 1 to separate the jaw from the kingpin and separate the tractor 1 from the semi-trailer 2.

Conversely, after finishing work in a semi-trailer 2 where cargo is shipped or shipped, the driver reverses the tractor 1 and relocates it under the semi-trailer 2 and connects the jaw to the kingpin. Then slightly lift the semi-trailer 2 using the trailer air suspension 1a (see FIG. 1), then the rods 151, 151 ′ of the locking cylinder 150 are pulled to lock the fixed leg 110. The fixing legs 110 and the rotation legs 120 are released from the holes 111a and 113a and the locking holes 121a of the rotation legs 120.

When the driving cylinder 140 operates in this state, the rod 140b is horizontal in the state in which the body 140a of the driving cylinder 140 is connected to the mounting bracket 2a around the hinge H. Pull up). The pivot leg 220 is pivoted about the hinge 123 to maintain a folded state on the side of the fixed leg 110 (see FIGS. 3 and 4). When the pivoting leg 220 is folded, the trailer air suspension 1a is returned to its original position.

Since the king king pin is not known here, a detailed description thereof will be omitted.

On the other hand, Figure 7 is a side view showing a structure in which the control unit and the sensor is further installed in the folding landing device of the semi-trailer according to an embodiment of the present invention.

In the same figure, since the rest of the configuration except for the control unit 160 and the sensor 170 is the same as in the embodiment of the present invention, the same reference numerals will be given thereto and detailed description thereof will be omitted.

As shown in FIG. 7, the mounting bracket 2a is provided with a control unit 160 having an operation button 161 installed thereon, and the fixing leg 210 detects a rotational position of the rotation leg 220. ) Is installed, the locking cylinder 150 may be automatically operated by the sensor 170. That is, when the operator turns on the operation button 161 of the control unit 160, the driving cylinder 140 is operated to push the horizontal shaft 130, wherein the horizontal shaft 130 is the pair Rotating the rotating leg 120 of the fixing leg 110 and the rotating leg 120 is coupled. At this time, the sensor 170 detects the coupling of the fixed leg 110 and the rotation leg 120, and automatically locks the fixed leg 110 and the rotation leg 120 by operating the locking cylinder 150.

On the contrary, when the operator turns off the operation button 161 of the control unit 160, the operation of the operation described above is reversed, and the locking of the fixing leg 110 and the rotation leg 120 is automatically released and fixed. Leg 110 and rotation leg 120 is automatically separated.

As described above, in the structure in which the control unit 160 and the sensor 170 are further installed, the folding operation and the unfolding operation may be automatically performed according to the on / off operation button 161.

On the other hand, Figure 8 is a perspective view showing a folding type semi-trailer of the landing device according to another embodiment of the present invention, Figure 9 is a folding type landing device of the semi-trailer according to another embodiment of the present invention the folding state of the landing device 10 is a side view illustrating a folding state of a landing device in a folding type landing device of a semi trailer according to another embodiment of the present invention, and FIG. 11 is a folding type landing of a semi trailer according to another embodiment of the present invention. 12 is a front view showing an unfolding state of the landing apparatus in the apparatus, and FIG. 12 is a side view showing an unfolding state of the landing apparatus in the folding type landing apparatus of the semi-trailer according to another embodiment of the present invention.

8 and 12, the folding type landing device 200 of the semi-trailer according to another embodiment of the present invention is vertically fixed to the mounting bracket (2a) formed on both sides of the front end portion of the semi-trailer chassis (2 '). A pair of fixing legs 210 installed and formed with a locking bracket 211 having a locking hole 211 a on one side thereof; A pair of pivot legs 220 having a hinge 222 formed at one side thereof and a locking bracket 221 having a locking hole 221 a formed at the other side thereof so as to be rotatably coupled to a lower portion of the fixing leg 210; A horizontal shaft 230 for horizontally connecting the pair of pivot legs 220; A winder unit (240) for pushing or pulling the horizontal shaft (230) to pivot the pivoting leg (220) about the hinge (222); And positioned between the pair of rotation legs 220 and fixed to the mounting bracket 2a to lock the locking bracket 211 of the fixing leg 210 and the locking bracket 221 of the rotation leg 220. And a leg locking unit 250 for locking.

Hereinafter, the configuration of the semi-trailer folding type landing device 200 according to another embodiment of the present invention will be described in more detail.

Folding type landing device 200 of the semi-trailer according to another embodiment of the present invention is a manual type, a pair of fixing legs 210 is fixed to the mounting bracket (2a) at regular intervals from each other, weld or Alternatively, the bolt B may be fixed to the flange P.

The fixing leg 210 is formed of a metal member having a rectangular case structure, and a locking bracket 211 having a locking hole 211a is formed at one lower side thereof.

The pair of pivot legs 220 are pivoted during the landing operation to be coupled to the fixed legs 210 and have a hinge 223 formed at one upper side thereof and a locking bracket 221 having a locking hole 221 a at the other side thereof. ) Is formed, and a shoe 225 in contact with the ground is formed at the bottom.

As shown in FIG. 9, the stepped groove 210a and the corresponding stepped 220a are formed at the ends of the fixed leg 210 and the rotation leg 220, respectively, so that the fixed leg 210 and the fixed leg 210 are formed. Coupling portions of the rotation leg 220 may be firmly maintained.

Folding type landing device 200 of the semi-trailer according to another embodiment of the present invention includes the winder unit 240 that serves to selectively rotate the rotation leg 220, the winder unit 240 Is composed of a ratchet gear 241, a handle 243, a stopper 245, a tension roller 247, and a wire 249.

The ratchet gear 241 is rotatably installed in one direction inside the fixing leg 210, and a center shaft 241a is installed at a position connecting the ratchet gear 241. The handle 243 is connected to the center shaft 241a and the handle 243 maintains the state exposed to the outside of the fixing leg 210.

A stopper 245 is elastically installed in the fixing leg 210 by a torsion spring (not shown) to elastically contact the ratchet gear 241. Since the torsion spring is a known technique, a detailed description thereof will be omitted.

The tension roller 247 is rotatably installed on the mounting bracket B4, and the wire 249 is supported by the tension roller 247 in the center shaft 241a and the ratchet gear 241. It connects the horizontal shaft 230 and is wound around the center shaft 341a.

The leg locking unit 250 is located between the fixing legs 210, the X-shaped link (251) rotatably installed around the hinge (251a) to the mounting bracket (B3); A handle (knob) 253 connected to an upper side of the X-shaped link 251 to operate the X-shaped link 251; The rotating legs 220 are connected to both lower sides of the X-shaped link 253 and selectively penetrate into the locking holes 211 a of the fixing legs 210 and the locking holes 221 a of the rotating legs 220. A locking bar 255 for fixing the position of the; And a torsion spring 257 installed on the hinge 251a to elastically operate the X-shaped link 251.

When the X-shaped link 253 is rotated by pushing the handle 253, the X-shaped link 253 is elastically actuated by the torsion spring 257, and both sides of the bottom of the X-shaped link 253 The connected locking bar 255 is selectively penetrated into the locking hole 211a of the fixing leg 210 and the locking hole 221a of the rotating leg 220 to fix the position of the rotating leg 220.

And reference numeral brackets B2, B3, B3 serves to support the handle 253, the X-shaped link 251 and the tension roller 247, respectively.

Hereinafter, the process of separating / combining the semi-trailer 2 from the tractor 1 using the folding type landing device of the semi-trailer according to another embodiment of the present invention configured as described above is the same as the above-described embodiment of the present invention. Hereinafter, only the folding and unfolding processes will be described.

When the racking gear 241 is released from the folding leg 220 in the folded state (FIGS. 9 and 10), the wire 249 is pulled by the load of the rotating leg 220, and the hinge 223 The rotating leg 220 rotates around the wire 249 and the wire 249 is released from the center shaft 241a. At this time, the tension roller 247 serves to elastically support the wire (249).

When the rotation leg 220 is rotated and positioned in a straight line with the fixed leg 210, the handle 241 is pushed. When the handle 253 is pushed, the end of the locking bar 255 connected to the X-shaped link 251 is inserted into the locking holes 211a and 221a, so that the fixing leg 210 and the rotation leg 220 are in a straight line. Position fixed (unfolded) (see FIGS. 11 and 12).

On the contrary, when the handle 253 is pulled, the end of the locking bar 255 connected to the X-shaped link 251 is removed from the locking holes 211a and 221a. Then, the handle 241 is inserted into the center of the ratchet gear 241 and turned, the ratchet gear 241 rotates. In this case, the stopper 245 may be elastically contacted with the racket gear 241 so that the ratchet gear 241 may rotate only in one direction. When the ratchet gear 241 rotates, the wire 249 is wound around the center gear 241a. At this time, the tension roller 247 serves to elastically support the wire (249). As the wire 249 is wound around the center shaft 241a, the pivot leg 220 pivots about the hinge 223 to be folded to the side of the fixed leg 210. The ratchet gear 241 is then locked again with a locking pin (not shown).

On the other hand, Figure 13 is a view showing a modified example of the leg locking unit in the folding landing device of the semi-trailer according to another embodiment of the present invention. The description of the figure describes only the configuration associated with the leg locking unit 350.

Referring to FIG. 13, the leg locking unit 350 is installed to be slidably moved to the fixed leg 210 by the mounting bracket B5. Both ends of the leg locking unit 350 are selectively inserted into the locking hole 211a of the fixed leg 210 and the locking hole 221a of the pivoting leg 220, whereby the position of the pivoting leg 220 is adjusted. It is formed in a fixed structure. The leg locking unit 350 configured as described above has a simpler configuration than the X-shaped link structure described above and is very easy and convenient to operate.

As described above, according to the present invention, the leg is divided into two parts, a fixed leg and a rotating leg, and in general, the rotating leg is folded on the side of the fixed leg, and the rotating leg can be rotated when necessary. By being configured, the landing operation is very easy and convenient, there is an effect that can perform the landing operation quickly.

In addition, the overall configuration is very simple, it is easy to install, and the manufacturing cost is reduced, and the overall load is greatly reduced, thereby reducing the fuel consumption.

As such, the rights of the present invention are not limited to the embodiments described above, but are defined by the claims, and those skilled in the art can make various modifications within the scope of the claims. It is self evident.

For example, in the present invention, the rotating leg is configured to be folded to the rear of the semi-trailer, but depending on the design conditions, the rotating leg may be folded to the rear of the semi-trailer or to the inside and outside of the fixed leg.

In addition, in the present invention, the mounting bracket is for fixing each component and its position may be changed according to the design conditions.

1 is a front view showing a landing device of a conventional semi-trailer

Figure 2 is a perspective view of a folding landing device of a semi trailer according to an embodiment of the present invention

3 is a front view showing a folding state of the landing device in the folding type landing device of a semi-trailer according to an embodiment of the present invention;

Figure 4 is a side view showing a folding state of the landing device in the folding landing device of the semi-trailer according to an embodiment of the present invention

5 is a front view showing an unfolding state of the landing device in the folding type landing device of a semi-trailer according to an embodiment of the present invention.

6 is a side view showing an unfolding state of the landing device in the folding landing device of the semi-trailer according to an embodiment of the present invention.

FIG. 7 is a side view illustrating a structure in which a control unit and a sensor are further installed in the folding type landing device of a semi-trailer according to an exemplary embodiment of the present disclosure.

8 is a perspective view showing a folding landing device of a semi-trailer according to another embodiment of the present invention

9 is a front view showing a folding state of the landing device in the folding landing device of the semi-trailer according to another embodiment of the present invention.

10 is a side view showing a folding state of the landing device in the folding landing device of the semi-trailer according to another embodiment of the present invention

11 is a front view showing an unfolding state of the landing device in the folding landing device of the semi-trailer according to another embodiment of the present invention.

12 is a side view showing an unfolding state of the landing device in the folding landing device of the semi-trailer according to another embodiment of the present invention.

13 is a view showing a modification of the leg locking unit in the folding landing device of the semi-trailer according to another embodiment of the present invention

* Description of the main parts

2 ': semi trailer chassis

2a: mounting bracket

110: fixed leg

111,113: locking bracket

111a, 113a: locking hole

120: pivot leg

121: locking bracket

121a: locking hole

123: hinge

130: horizontal shaft

140: drive cylinder

140a: body

140b: load

150: locking cylinder

151,151 ': load

160: control unit

161: operation button

170: sensor

240: winder unit

241: ratchet gear

241a: center axis

243: handle

245: stopper

247: tension roller

249: wire

250: leg locking unit

251: X link

251a: hinge

253: handle

255: locking bar

257: torsion spring

H: hinge

Claims (7)

In the container semi-trailer, which is separated or combined from the tractor by the operation of the trailer air bag, the container is loaded on the top, It is installed vertically fixed to the mounting bracket (2a) formed on both sides of the front end portion of the semi-trailer chassis (2 '), the locking bracket (111, 113) having a locking hole (111a) (113a) on one side is formed A pair of securing legs 110; A pair of rotation legs 120 having a hinge 123 formed at one side thereof and a locking bracket 121 having a locking hole 121 a formed at the other side thereof so as to be rotatably coupled to the lower portion of the fixing leg 110; A horizontal shaft 130 horizontally connecting the pair of pivot legs 120; The body 140a is hinged to the mounting bracket 2a and the rod 140b is connected to the horizontal shaft 130 to push or pull the horizontal shaft 130 to center the hinge 123. A driving cylinder 140 that rotates the rotation leg 120 by using; And Located between the pair of rotating legs 120 and fixed to the mounting bracket 2a, the locking bracket 111 of the fixing leg 110 and the locking bracket 121 of the rotating leg 120 are locked. Folding cylinder of the semi-trailer comprising a locking cylinder (150). The method of claim 1, The rods 151 and 151 'of the locking cylinder 150 are selectively penetrated into the locking holes 111a and 113a of the fixed leg 110 and the locking holes 121a of the pivoting leg 120. Folding type landing device for a semi-trailer, characterized in that the position of the rotation leg 120 is fixed. The method of claim 1, The mounting bracket 2a is provided with a control unit 160 provided with an operation button 161, the fixing leg 110 is provided with a sensor 170 for detecting the rotational position of the rotation leg 120, Folding device of a semi-trailer, characterized in that the locking cylinder 150 is automatically operated by the sensor 170. In the container semi-trailer, which is separated or combined from the tractor by the operation of the trailer air bag, the container is loaded on the top, A pair of fixed legs which are fixedly installed on a mounting bracket 2a formed on both sides of the front end portion of the semi-trailer chassis 2 'and having a locking bracket 211 having a locking hole 211a on one side thereof ( 210); A pair of pivoting legs 220 having a hinge H formed at one side thereof and a locking bracket 221 having a locking hole 221a formed at the other side thereof so as to be rotatably coupled to a lower portion of the fixing leg 210; A horizontal shaft 230 for horizontally connecting the pair of pivot legs 220; A winder unit 240 for pushing or pulling the horizontal shaft 230 to rotate the pivoting leg 220 about the hinge 223; And Located between the pair of rotating legs 220 and fixed to the mounting bracket 2a, the locking bracket 221 of the fixing leg 210 and the locking bracket 221 of the rotating leg 220 are locked. Semi-trailer folding type landing device comprising; leg locking unit (250). The method of claim 4, wherein The winder unit 240 is a ratchet gear 241 is installed to be rotatable only in one direction inside the fixed leg 210; A handle 243 connected to the center shaft 241a of the ratchet gear 241 and exposed to the outside of the fixing leg 210; A stopper 245 installed inside the fixing leg 210 to elastically contact the ratchet gear 241; A tension roller 247 installed on the mounting bracket 2a; And A wire 249 connected between the center shaft 241a of the ratchet gear 241 and the horizontal shaft 230 while being supported by the tension roller 247, and wound around the center shaft 241a. Folding landing device for semi-trailers. The method of claim 4, wherein The leg locking unit 250 is located between the fixing legs 210, the X-shaped link (251) rotatably installed around the hinge (251a) to the mounting bracket (B3); A handle (knob) 253 connected to an upper side of the X-shaped link 251 to operate the X-shaped link 251; It is connected to both lower sides of the X-shaped link 251, and selectively penetrates into the locking hole 211a of the fixed leg 210 and the locking hole 221a of the rotating leg 220 to rotate the rotation leg 220 A locking bar 255 for fixing the position of the; And And a torsion spring (257) installed on the hinge (251a) to elastically operate the X-shaped link (251). The method of claim 6, When the X-shaped link 251 is rotated by pushing the handle 253, the locking bar 255 connected to both ends of the X-shaped link 251 and the locking hole 211 a of the fixing leg 210 are rotated. The semi-trailer folding landing device, characterized in that the position of the pivoting leg 220 is fixed by penetrating selectively into the locking hole (221a) of the pivoting leg (220).

Images