JP2002114083A - Loading and unloading device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To inexpensively provide a lightweight and simple structured loading and unloading device with easy operation, suitable for usage by mounting on a loading space of a truck, and without occupying a main part of the loading space by its mounting and impairing versatility. SOLUTION: As its main constituent parts, this device is provided with a pair of support members 2 attached on both side end parts near to a rear part on the loading space D of the truck T, a portal shaped portal arm 3 with both side lower end parts rotatably supported by the support member 2 and arranged so as to freely tilt in fore and aft directions of the loading space D, a pair of stoppers 4 regulating a backward tilting angle of the portal arm 3 at a predetermined angle, and a pair of slanted links 5 regulating the portal arm 3 from tilting forward exceeding a perpendicularly erected state or a slightly forwardly slanted erected state.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a loading / unloading device for a truck, and more particularly to a loading / unloading device suitable for mounting on a bed of a general-purpose truck.

[0002]

2. Description of the Related Art At present, trucks are indispensable as means of commercial transportation such as distribution of goods, transportation of heavy goods, repair and sale, and there are also remarkable improvements in functions according to their uses. . On the other hand, small and medium-sized trucks
Because it is easy to travel on narrow urban roads and uneven terrain, it is used for various purposes such as daily traffic movement, leisure and agricultural work.

[0003]

However, in these general-purpose trucks, when loading and unloading luggage alone in an urban area or outdoors where there is no cargo handling equipment, the weight of the truck is 40 to 40%.
If it exceeds 50 kg, it is no longer possible to load and unload by hand alone. Therefore, for example, after hanging the inclined plate on the bed from the ground with a plate or a bar, etc., it is necessary to prepare for dragging up by a hoisting device such as a winch or a chain block arranged on the bed side, Depending on the shape and type of luggage, a situation arises in which it is unacceptable to rely on coarse and unstable means. On the other hand, trucks equipped with a swivel crane between the cab and the pallet are widely used.These cranes are specially developed for cargo handling. Since it is required, it is expensive, and since it is heavy, it has an adverse effect on running performance and fuel efficiency, and is not suitable for general use for loading and unloading luggage.

The present invention has been made to solve the above-mentioned problems, and can be operated by using a simple and small hoisting means such as a winch or a chain block, and the apparatus can be provided at a low cost with a light and simple structure. It is an object of the present invention to provide a loading / unloading device which is easy to operate and is suitable for use by being mounted on a truck bed, and which does not occupy a main part of the truck bed and does not impair versatility. .

[0005]

In order to achieve the above object, a loading / unloading apparatus according to the present invention is mounted on a truck bed operated via a hoisting means such as a winch or a chain block. A pair of support members attached to both end portions of the carrier near the rear thereof, and a gate supported by the support members so that both lower end portions can be tilted in the front-rear direction of the carrier. Arm, rearward tilt angle restricting means for restricting the rearward movement of the loading platform of the portal arm within a predetermined angle, and upright holding means for retaining the portal arm in an upright state. And

According to the loading / unloading device of the first aspect, when loading the load, the gate-shaped arm is tilted rearward of the loading platform to a predetermined tilt angle regulated by the rear tilt angle restricting means. The upper beam of the arm is extended beyond the trailing edge of the carrier, and in this state, it is pulled out from, for example, a hoisting means (a winch or the like) provided in front of the carrier, and is freely slid on the upper beam of the portal arm. The load at the ground level behind the truck bed is lifted to a level higher than the bed level by a tow line supported by the car or by a hoisting means (eg, a chain block) suspended from the upper cross beam of the portal arm. And lift. The portal arm is then tilted forward of the carrier and raised until it is substantially upright. At this time, the luggage moves forward above the bed with the portal arm while being held near the upper part of the portal arm. Then, the gate-shaped arm is held in the upright state by the upright holding means, and the luggage which has been wound up and lifted can be lowered onto the carrier by being rewound and loaded. When unloading the luggage on the carrier to the ground behind the carrier, the unloading can be performed in the reverse procedure.

In the loading / unloading device according to the present invention, the portal arm, which is a main component of the loading / unloading device, is mounted so as to straddle the central portion of the loading platform. Since it is used, the versatility of the truck to be mounted is not impaired.

[0008] According to a second aspect of the present invention, the gate-shaped arm may be provided with a pulley for hanging a tow line on an upper cross beam thereof, which extends rearward.

According to the loading / unloading device of the second aspect, for example, the load is unwound from a hoisting means (a winch) provided near the front end of the loading platform, and the load is hoisted by a tow line supported by a pulley of a portal arm. Can be. Since the pulley is provided to the rear of the portal arm, the center of gravity of the portal arm is slightly deviated to the rear, so when pulling out the towline, operations such as pushing the portal arm rearward are required. Even if not, it tilts backward naturally. On the other hand, from this state,
The load is lifted up by winding up the tow line with the hoisting means, but when the hoisting reaches the upper limit, the winding force of the hoisting means acts as a force to pull the portal arm back toward the front of the loading platform. By this action, the portal arm is raised to the standing state. Also, from this standing state,
When the tow line is extended by the hoisting means, the component force acting on the pulley is obliquely forward and downward due to the support force of the tow line and the weight of the load, so that the portal arm does not incline to the rear of the carrier. The upright position is maintained, so that the load is loaded on the carrier substantially immediately below the pulley. That is, in the present loading / unloading device, the tilting of the portal arm and the lifting / lowering of the load can be performed by one simple hoisting means.

According to a third aspect of the present invention, the bridge-shaped arm has a hanging bracket capable of hanging a hoisting means such as a chain block protruding rearward from an upper cross beam thereof.
Symmetrically to the hanging metal fitting, a hanging metal fitting capable of suspending another hoisting means or fastening a tow line can be projected forward.

According to the loading / unloading device of the third aspect, the load is lifted / lowered by a hoisting means (for example, a chain block) suspended from the hanging bracket of the portal arm.
Here, since the suspension ring is provided so as to protrude rearward, when the hoist is suspended, the portal arm is tilted rearward of the loading platform by the gravity. Further, in order to return the gate-shaped arm in a state where the luggage is wound up to the upright state, another lifting means (for example, a chain block or a chain block) hung on a hanging bracket in front of the gate-shaped arm or a front portion of the loading platform. A winch may be used to pull the cargo bed forward through the towing line.

Here, in the present loading / unloading device, since the gate-shaped arm is pulled back by another hoisting means, the rising amount of the load at the time of hoisting the load is minimized. In addition, when pulling back, the gate-shaped arm is held at an appropriate angle on the way to the upright state, and the load can be moved up and down in that state, so that the loading position of the load on the bed can be selected in a relatively wide range. . Moreover, by using only manual hoisting means such as a chain block which does not require a power source, the gate-shaped arm can be tilted and the load can be raised and lowered.

It is preferable that the upright holding means is configured to allow the portal arm to tilt forward and release the upright state.

According to the loading / unloading device of the fourth aspect, when the loading / unloading of the load is not performed or when the truck is running, the regulation by the upright holding means is released, and the gate-shaped arm is tilted forward, and the loading is performed. Can be laid down. Also,
When a portal arm having a height that does not fit on the bed is provided, it is stabilized by holding the gate arm in a tilted state on a torii gate near the front end of the bed.

According to a fifth aspect of the present invention, the height of the gate-shaped arm can be made substantially the same as the height of a torii gate provided near the front end of the loading platform.

According to the loading / unloading device of the present invention, when carrying a long load (e.g., a long pipe or timber) exceeding the length of the truck bed, the portal arm is set up. Hold and fix, and place long luggage between the upper cross beam of the gate-shaped arm and the upper cross beam of the torii gate in front of the loading platform. Can be.

According to a sixth aspect of the present invention, the support member may be provided with a plurality of locking portions of the portal arm at intervals in the front-rear direction.

In the loading / unloading device according to the sixth aspect, for example, a separate arm locking portion is provided at a position closer to the rear of the loading platform than the reference arm locking portion, so that the arm at the rear end side is provided. By holding the portal arm in the upright state at the locking portion, the portal arm is raised and held at the rearmost end of the carrier. As a result, it is possible to increase the distance between the front gate and the torii gate and stably load longer packages.

According to a seventh aspect of the present invention, the support member may include the rearward inclination restricting means and the upright holding means integrally combined.

According to the loading / unloading device of the present invention, the entire device can be made simpler and the structural strength can be improved.

As described in claim 8, the support member can be provided movably in the front-rear direction on rails fixed in the front-rear direction along both side edges of the carrier.

According to the loading / unloading device of the present invention, for example, the support member of the gate-shaped arm is fixed to a position shifted from the rear of the loading platform, which is the reference position for loading / unloading, to the front position of the loading platform. By doing so, it is possible to arbitrarily change the position of the baggage on the bed and load the baggage in an empty place of the bed.

[0023]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a loading / unloading device according to the present invention will be described below with reference to the drawings.

1 to 3 show an embodiment of a loading / unloading apparatus according to the present invention. FIG. 1 (a) is a perspective view showing a schematic configuration of the apparatus, and FIG. 1A is an enlarged sectional view taken along line bb, FIG. 1C is an enlarged sectional view taken along line cc in FIG. 1A, and FIG. 1D is an enlarged sectional view taken along line dd in FIG. FIG.

As shown in FIG. 1 (a), a loading / unloading device 1 of this embodiment comprises a pair of support members 2 disposed on both sides of a truck T on a loading platform D near a rear end thereof, in a gate shape. Formed,
The lower ends of both sides are rotatably supported by the support member 2,
Portal arm 3 that is freely tiltable in the front-rear direction of carrier D
A pair of stoppers 4 as rearward inclination restricting means for restricting the rearward inclination angle of the portal arm 3 to a predetermined angle;
As a main component, a pair of inclined links 5 as upright holding means for holding the gate-shaped arm 3 in an upright state or standing slightly inclined forward and regulating forward inclination is provided.

The pair of support members 2 are made of an angle material having an L-shaped cross section. One side of the support member 2 is erected at the side edge of the carrier D as shown in FIGS. 1 (b) and 1 (c). The other side, which is the bottom side, is fastened on the carrier D with a plurality of fastening bolts 7 spaced apart from each other, so that it is attached along the front-rear direction of the opposing side edges near the rear of the truck D. Can be The support member 2 has a circular through-hole 2a formed at a position spaced forward from the rear end of the standing portion by a predetermined distance, and has a long hole extending from the position spaced forward from the through-hole 2a to the front end. 2b are formed, and the through hole 2a and the long hole 2b are provided so that the left and right positions in the front and rear direction coincide with each other.

The portal arm 3 is formed by bending a metal pipe into a portal shape. As shown in FIG. 1B, the support member 2 is fixed to a cylindrical bearing member 3d fixed to the lower ends on both sides by welding. Bolt 5a is inserted into hole 2a penetrating from outside
Of the support member 2 is tightened by loosely inserting the screw into the bearing member 3d and screwing the same into the bearing member 3d. The loading platform D is supported so as to be tiltable in the front-rear direction with 5a as a fulcrum. In addition, the gate-shaped arm 3 is fixed to the center of the upper cross beam 3a so that the pulley 6 can be extended rearward via a bracket 6a so as to extend rearward through a bracket 6a. Winch W deployed at the front end
The tow rope R extended from (FIG. 2) is bridged. As shown in FIG. 1 (d), the bracket 6a of the pulley 6 is provided with a stopper surface 6b at the lower end of the front portion thereof for regulating the highest position of the load lifting hook.

The pair of stoppers 4 are integrally erected at the rear end of the support member 2.
And vertical beams (vertical beams) 3b on both sides of the gate-shaped arm 3 contact the upper end of the stopper 4 when the gate-shaped arm 3 is tilted backward from the bed D. It restricts the rearward of D from inclining more than a predetermined angle (for example, 30 °). Further, the stoppers 4 are integrally connected to the support member 2 to improve the structural strength.

A pair of inclined links 5 are made of a metal plate having a fixed width. Be worn. On the other hand, a through-hole is formed in the lower end of the inclined link 5, and a pin is slidably inserted in a long hole 2b formed in the front-rear direction of the support member 2 slidably in the front-rear direction as shown in FIG. The shaft 5c is configured to be able to move in the front-back direction of the support member 2 by penetrating the through hole and screwing it with a nut. With this configuration, when the gate-shaped arm 3 is tilted to the rear of the loading platform D, the gate-shaped arm 3 is tilted to follow. When the gate-shaped arm 3 is tilted forward and is in an upright state, the pin shaft 5c at the lower end is connected to the support member 2. By contacting the front end of the long hole 2b, the gate-shaped arm 3 is prevented from tilting forward beyond its standing state. As shown in FIG. 1 (c), the pin shaft 5c at the lower end of the inclined link 5 is detachably screwed with a nut. The restriction on tilting can be released.

The loading / unloading device according to the present embodiment is configured as described above. Next, the loading / unloading mode of the load by the present example device will be described with reference to the drawings. 2 and 3 are side views showing the operation of the apparatus of the present embodiment in a state where the apparatus is mounted on a truck.

As shown in FIG. 2, the loading / unloading device 1 of this embodiment is mounted along the front-rear direction of both side edges of the truck T near the rear of the loading platform D. A towing line R extended from a winch W provided at the front of the loading platform D is hung on 6, and a hook F is attached to the tip of the towing line R. At the time of loading the luggage, the tow rope R is extended from the winch W, and the portal arm 3 is tilted backward to a predetermined inclination angle regulated by the stopper 4 as shown by a dashed line in FIG. Then, the upper cross beam of the gate-shaped arm 3 is extended rearward beyond the rear edge of the carrier D. Since the center of gravity of the gate-shaped arm 3 is slightly eccentric to the rear by providing the pulley 6 so as to protrude rearward, when the tow line R is extended from the winch W, it is naturally inclined rearward.

In this state, the hook F at the tip of the towing line R is hooked on the luggage at the ground level behind the truck T,
Subsequently, the load can be lifted by winding the towing line R with the winch W. And hook F is pulley 6
When it reaches the upper limit position of the winding contacting the stopper surface portion 6b, the lifting of the luggage is stopped, and the winding force of the winch W acts as a force that causes the portal arm 3 to move forward, and this force causes The arm 3 is raised to a position where the forward tilting is restricted by the tilt link 5, that is, an upright state shown by a solid line in FIG. 2, and is maintained in the upright state.

Next, when the tow line R is slowly unwound (rewinded) by the winch W from the upright state of the portal arm 3, the pulley 6 acts on the pulley 6 by the tractive force of the tow line R and the weight of the load. Since the component force is obliquely forward and downward, the load is lowered and loaded on the loading platform D almost directly below the pulley 6 while the portal arm 3 is held upright without tilting backward.

When unloading cargo from the loading platform D,
Unloading can be performed in the reverse order of the above. That is, by winding the winch W, the load on the bed D is lifted to the position of the upper cross beam of the portal arm 3. In this state, the portal arm 3 is in an upright state, but since the position of the pulley 6 is deviated rearward, a force acting on the portal arm 3 to rotate the portal arm 3 rearward of the bed D is applied. I have. Then, by driving the winch W and slowly unwinding (unwinding) the tow line R, the gate-shaped arm 3 is moved to the rear of the bed D while the load is held near the upper cross beam 3a of the gate-shaped arm 3. Lean down. Then, the gate-shaped arm 3 comes into contact with the stopper 4, and the pulley 6 of the gate-shaped arm 3 is held in a state of protruding backward from the loading platform D. Here, the winch W is continuously driven to rewind (extend) the tow line R.
As a result, the luggage descends from the height of the bed D to the ground by its own weight. If the luggage is lifted to the vicinity of the upper cross beam 3a of the portal arm 3 when the luggage is unloaded, for example, if the pulley 6 can be locked in a timely manner, the luggage can be prevented from lowering and the winch W can be prevented. With rewinding, the portal arm 3 is reliably inclined backward. If the pulley 6 is unlocked when the gate-shaped arm 3 comes into contact with the stopper 4 and the luggage is lowered to the ground, the winch W is driven to slowly rewind the tow line R. You can unload your luggage smoothly without any operation.

When the loading / unloading of the load is not performed or the truck T is running, the pin shaft 5c of the inclined link 5 is
3b, the restriction on the tilt of the portal arm 3 to the front is released, and the portal arm 3 is tilted forward, and FIG.
As shown in (a), by laying down on the carrier D, the carrier can be stably placed on the carrier D. When the portal arm 3 having a height that does not fit on the loading platform D is provided, as shown in FIG. 3 (b), it is stabilized by falling onto the torii S in front of the loading platform D and locking it. . In addition, if necessary, the pin shaft 5c of the inclined link 5 and the bolt 5a of the portal arm 3 are removed, so that the portal arm 3 itself can be removed and stored in a warehouse or the like outside the vehicle.

As described above, in the device 1 of this embodiment,
By simply disposing one small winch W near the front end of the loading platform D, the portal arm 3 can be tilted and the load can be raised and lowered, and the operation is very simple as described above. In addition, since the portal arm 3 and its supporting member 2 are mounted on the carrier D in such a manner as to straddle the carrier D, the general versatility of the carrier D inherent in the truck T is not impaired. In addition, during traveling, the bed D
Since it can be arranged on the upper side, it is relatively lightweight and the weight increase is not large, the running property of the truck does not decrease.

FIG. 4 is a side view showing another embodiment of the loading / unloading device according to the present invention.

The loading / unloading device 1 'of this embodiment is different from the above-described winch W in that two chain blocks C are used.
1. A device operated using C2.
Since the configuration of the main part is the same as that of the above-described embodiment except that the upper structure of the part is partially different, the description is omitted here by giving the same reference numerals to the same parts and showing them in the drawing. Only the differences will be summarized and described.

In the loading / unloading device 1 'of this embodiment shown in FIG. 4, the portal arm 3' is provided at the center of the upper horizontal girder.
A hanging metal fitting 8 for hanging the chain block C1 projects rearward and protrudes, and the chain block C2 can be hung forward symmetrically with the hanging metal fitting 8, and another towing line R 'is provided. A hanging metal fitting 9 capable of locking the hook F is protrudingly provided.

In the loading / unloading apparatus 1 'of this embodiment, as shown in FIG. 4, the load is lifted and lowered by the chain block C1 suspended from the hanging bracket 8 of the portal arm 3'. Here, since the hanging bracket 8 is provided so as to protrude rearward, when the chain block C1 is suspended, the gate-shaped arm 3 'naturally moves to the carrier D due to its weight.
Leaning backwards. In order to tilt the portal arm 3 'to the rear of the loading platform D and pull back the portal arm 3' in a state where the load is lifted by the hook F of the chain block C1 to the upright state, the portal arm 3 'is The chain block C2 is hung by the hanging metal fitting 9, and the hook F attached to the tip of the pulling rope R 'for pulling back is locked by a stopper fixed to the front part of the loading platform D and pulled. You. Although not shown, a chain block C2 (or a winch) is suspended at the front of the loading platform D, and the towing rope R 'extended from the chain block C2 (or a winch) is drawn.
The hook F attached to the tip of the hook may be hooked on the round hole of the hanging metal fitting 9 and pulled.

In the apparatus 1 'of this embodiment, the retraction of the portal arm 3' is performed by a chain block C2 different from the chain block C1 for lifting and lowering the load.
In other words, the gate-shaped arm 3 'can be pulled back without being wound up to the maximum height, so that the height required for winding up the luggage can be minimized. Further, at the time of retraction, the gate-shaped arm 3 'is stopped at an intermediate inclination angle until the standing state is reached, and the luggage can be hoisted and lowered in that state, so that the selection range of the loading position on the bed D is expanded. be able to. As described above, the loading and unloading of the load can be performed by using only the general-purpose manual hoisting means such as the chain blocks C1 and C2 that do not require the power source.

FIGS. 5 to 7 show still another embodiment of the loading / unloading apparatus according to the present invention. FIG. 5 (a) is a side view showing the structure of a main part of the apparatus, and FIG. ) Is a sectional view taken along the line AA in FIG. 5A, and FIGS. 6 and 7 are side views showing the operation of the device of this embodiment in a state of being mounted on a truck. In addition, FIG.
In FIG. 7, the components denoted by the same reference numerals as those of the above-described two embodiments are substantially equivalent, and thus the description thereof is omitted here.

As shown in FIG. 5 (a), in the loading / unloading device 11 of the present embodiment, the height of the portal arm 13 is set to the height of the torii S of the truck T on which the loading arm D is mounted. Engagement holes 13 for fixing are provided at the same height, and
Except for the provision of c, it is common to the portal arm 3 of the first embodiment described above. Further, a pair of support members 12 on both sides for tiltably supporting the gate-shaped arm 13,
The stopper 14 integrally fixed to the rear end has the same shape as the above embodiment.

The support member 12 has a long hole 12b for engaging the pin shaft 5c of the inclined link 5 extending to the rear end reaching the stopper 14, and the long hole 1b.
2b, on the lower surface side of each of the reference position and the rearmost position where the gate-shaped arm 13 is tiltably supported at a fixed position,
U-shaped groove 1 capable of locking pin shaft 13b of portal arm 13
2a and 12d are provided. A box-shaped holding plate 1 having a semicircular groove at the lower end is provided on the U-shaped groove 12a at the reference position.
5 is detachably attached, and the two
3 constitutes a bearing portion of the pin shaft 5a. On the other hand, the stopper 14 has an engagement hole 13c of the portal arm 13 on the side thereof.
A through-hole 14a is provided at the same height as the above.

In the apparatus of the present embodiment, the holding plate 15 is removed, and the portal arm 13 is moved from the reference position shown by the dashed line in FIG. 5A to the rear end position shown by the solid line. By locking the lower end of 13 into the U-shaped groove 12d at the rear end, the lower end of the thirteen is upright along the stopper 14.
In this state, as shown in FIG. 5D, both are fastened with fixing bolts / nuts 19, whereby
3 is upright at the rearmost end so that it can be fixed and held.

In the apparatus 11 of this embodiment, as shown in FIG. 6, the portal arm 13 is supported and tilted by the U-shaped groove 12a at the reference position, thereby maintaining the same state as in the above-described embodiment. You can load and unload your luggage. FIG.
As shown by a two-dot chain line in FIG.
To the U-shaped groove 12d at the rear end along this position. At this position, the gate-shaped arm 13 is tilted forward of the carrier D around the bolt 5a, and can be stored in a state where it is laid down on the carrier D. In this case, even if the height of the gate-shaped arm 13 is increased to a height over substantially the entire length in the front-rear direction of the carrier D, the carrier D
Can be stored on top.

When transporting a long load (for example, a long pipe) exceeding the length of the bed D of the truck T, as shown in FIG. A long luggage is laid over the upper cross beam of the gate-shaped arm 13 and the upper cross beam of the torii S in front of the loading platform D, and fixed by being held upright along the stopper 14. , Can be transported by being locked with a rope or the like. That is, in this example device, long packages can be stably loaded and transported in the horizontal direction, and the upright fixed position of the portal arm 13 is located at the rearmost end portion 12d of the loading platform D. Bed D
Since the distance to the front torii S is widened, longer luggage can be stably loaded.

8 to 10 are views showing still another embodiment of the loading / unloading apparatus according to the present invention, and FIG. 8 (a) is a side view partially showing the outline of the apparatus of the present invention. FIG. 8 (b)
FIG. 9 is an enlarged sectional view taken along the line AA of FIG.
FIG. 7 is a side view showing an operation mode in a state where the device of this example is mounted on a truck. In FIGS. 8 to 10, the components denoted by the same reference numerals as those of the third embodiment are substantially equivalent, and thus the description thereof is omitted here.

As shown in FIG. 8, in the loading / unloading device 21 of this embodiment, the gate-shaped arm 23 has the same height as the height of the torii gate S of the truck T mounting the same, and
It has the same configuration as the portal arm 3 of the first embodiment described above, except that a fixing engagement ring 23d is provided at the lower part on both sides thereof.

The supporting member 22 for supporting the gate-shaped arm 23 has a plate-shaped upright portion 2 from the side of the angled base end.
2e is provided so as to extend upward. The lower ends of both sides of the portal arm 23 are pivotally supported at the center in the front-rear direction of the base end via a bearing member 22a common to the first embodiment, and the upper end of the upright portion 22e. At the rear end, a flat plate-shaped inclination stopper 24 for restricting the rearward tilting of the portal arm 23 is provided so as to protrude inward while being inclined at the same angle as the restriction angle, and at the upper front end of the upright portion 22e, A stop bar 25 for restricting forward tilting of the portal arm 23 is provided, and a locking bolt 29 for holding the portal arm 23 upright is detachably provided below the barrier bar 25. The support member 22
As shown in FIG. 8 (b), a rail 30 having a rectangular tubular shape along the longitudinal direction and having an upper center opened in the longitudinal direction is fixed to both side edges of the bed D of the truck T. The support member 22 is slidably disposed on the carrier D so as to be movable in the front-rear direction of the carrier D.

Here, as shown in FIG. 8 (b), the stopping bar 25 of the supporting member 22 is detachably attached to the upright portion of the supporting member 22 by a nut 25a, and is regulated by the stopping bar 25. The standing state of the gate-shaped arm 23 is such that it is inclined forward by a small angle θ as shown by the dotted line in FIG. 8A. As shown in FIG. 8 (b), the lower arm 23d is fixed to the support member 22 by a locking bolt 29, as shown in FIG. 8 (b). It is kept in an upright state. The support member 22 is located at a predetermined position in the front-rear direction.
8 is fixed at a fixed position on the rail 30 by tightening with a fastening bolt 31 as shown in FIG.

In the apparatus 21 of this embodiment, as shown in FIG. 8 (a), a pair of support members 22 are fixed at the reference position of the carrier D, and the cargo is stacked in the same manner as in the above embodiment. Unloading can be performed.

As shown in FIG. 9, the apparatus 21 of the present embodiment moves and fixes the pair of support members 22 from a position near the rear of the carrier D, which is a reference position for loading and unloading, to a position in front of the carrier D. This makes it possible to change the position of the load loaded on the loading platform D or change the way of loading the load to perform the sorting.

In the apparatus 21 of the present embodiment, when transporting a long load (for example, a long pipe) exceeding the length of the bed D of the truck T, as shown in FIG. 23 can be stood upright at the rear of the loading platform D and fixed, and long luggage can be hung over the gate-shaped arm 23 and the torii S at the front of the loading platform D to be loaded, hung with a rope or the like, and transported.

The above-mentioned device 21 has a simple structure, and has a small number of movable parts, so that the structural strength can be improved. Note that the support member 21 can be directly fixed on the carrier D.

[0056]

As described above, the loading / unloading device according to the present invention has the following excellent effects.

According to the first aspect of the present invention, the configuration is simple, the weight can be easily reduced, and the operation is easy.
It is suitable to be used by mounting it on a truck bed, and since it is mounted so as to straddle the bed, the loading does not occupy the main part of the bed, so that the versatility of the truck to be loaded is not impaired.

According to the second aspect of the present invention, since the portal arm is located slightly behind the center of gravity, when the pulling line or other force acting on the pulley is removed, the portal arm naturally tilts backward, and from this state, When the towing line is rolled up to the upper limit by hoisting means,
The portal arm is then raised to an upright position, so that the activation of the portal arm and loading / unloading of the load can be performed by one hoisting means.

According to the third aspect of the present invention, the lift at the time of hoisting the load can be minimized, and the load can be hoisted and lowered by stopping the gate-shaped arm at an intermediate inclination angle. Can be expanded. In addition, the operation of the portal arm and the loading / unloading of the load can be performed only by using general-purpose hoisting means such as a chain block which does not require a power source.

The loading / unloading device according to claim 4 is
The front-tilt restricting means of the portal arm is releasably provided, and when the truck is running, the restriction by the forward-tilt restricting means is released so that the portal arm can be tilted forward and fall down on the carrier. When not in operation, the gate-shaped arm or the like falls down on the carrier, and the running of the truck can be stabilized.

According to a fifth aspect of the present invention, the length of the cargo bed of the truck is increased by erecting the portal arm in an upright state and fixing the luggage on the portal arm and the torii of the carrier. It is possible to carry a long luggage exceeding the maximum length in a stable horizontal direction.

According to the sixth aspect of the present invention, the distance between the gate-shaped arm and the torii gate at the front of the bed is widened by standing upright at the right end of the bed to stabilize even longer luggage. Can be loaded on

[0063] In the invention according to claim 7, the support member comprises:
Since the rearward inclination restricting means and the upright holding means are integrally provided, the entire apparatus can be made simpler and the structural strength can be improved.

The invention according to claim 8 is that the support member comprises:
By moving the luggage from the rear of the luggage, which is the reference position for loading and unloading, to the front of the luggage and fixing the luggage, the position of the luggage loaded on the luggage can be changed and rearranged.

[Brief description of the drawings]

FIG. 1 (a) is a perspective view showing a loading / unloading device according to an embodiment of the present invention, and FIG. 1 (b) is bb in FIG. 1 (a).
1 (c) is an enlarged sectional view taken along line cc of FIG. 1 (a), and FIG. 1 (d) is an enlarged sectional view taken along line dd of FIG. 1 (a). It is a perspective view which shows the rear part of a carrier.

FIG. 2 is a side view showing a loading / unloading mode in a state where the loading / unloading device of FIG. 1 is mounted on a truck bed.

FIG. 3A is a side view showing a state where the portal arm is housed in a state where the apparatus shown in FIG. 1 is mounted on a truck;
(B) is a side view which shows the storage state in the Example of the portal arm which made height high.

FIG. 4 is a side view showing another embodiment of the loading / unloading device according to the present invention.

5 (a) is a side view showing still another embodiment of the loading / unloading device according to the present invention, and FIG. 5 (b) is FIG. 5 (a).
3 is an enlarged sectional view taken along line AA of FIG.

FIG. 6 is a side view showing a loading / unloading mode of a load in a state where the apparatus of FIG. 5 is mounted on a truck.

FIG. 7 is a side view showing a state where a long object is loaded in a state where the apparatus shown in FIG. 5 is mounted on a truck.

8 (a) is a side view showing still another embodiment of the loading / unloading device according to the present invention, and FIG. 8 (b) is FIG. 8 (a).
3 is an enlarged sectional view taken along line AA of FIG.

FIG. 9 is a side view showing a loading / unloading mode of the apparatus of FIG. 8 in a state of being mounted on a truck.

FIG. 10 is a side view showing a state where a long object is loaded in a state where the apparatus shown in FIG. 8 is mounted on a truck.

[Explanation of symbols]

 1.1 1 ・ 11 ・ 21 Loading / unloading device 2 Support member 2a Through hole 2b Slot 3 ・ 3 ′ ・ 13 ・ 23 Portal arm 3a Upper cross beam 3b Pin shaft 4 Stopper 5 Incline link 5a Pin shaft 5b Pin shaft Reference Signs List 6 Pulley 6a Supporting part 6b Stopper face part 7 Fastening bolt D Carrier F Hook R Towing rope T Truck W Winch (Hoisting means) C1, C2 Chain block (Hoisting means)

Claims (8)

[Claims] Claims: 1. A winch, mounted on a truck bed.
What is claimed is: 1. A loading / unloading device which is operated via a hoisting means of a towing line such as a chain block, comprising: a pair of support members attached to both end portions of the carrier near a rear portion thereof; Arm that is supported so as to be tiltable in the front-rear direction of the loading platform, rearward tilt regulating means that regulates the backward tilting of the loading platform within a predetermined angle, and holds the portal arm in an upright state. A loading / unloading device, comprising: 2. The loading / unloading device according to claim 1, wherein the gate-shaped arm has a pulley for hanging a tow line on the upper cross beam, which is provided to project rearward. 3. The gate-shaped arm has a hanging bracket, which can hang a hoisting means such as a chain block, protruding rearward from an upper horizontal beam thereof, and another symmetrically with the hanging bracket. 2. The loading / unloading device according to claim 1, wherein a hanging bracket capable of suspending the hoisting means or fixing the tow line is projected forward. 4. The loading / unloading device according to claim 1, wherein the upright holding means is configured to allow the portal arm to tilt forward and release the upright state. . 5. The loading / unloading device according to claim 1, wherein the height of the portal arm is substantially the same as the height of a torii gate provided near the front end of the loading platform. . 6. The loading / unloading device according to claim 5, wherein the support member has a plurality of locking portions of the gate-shaped arm at intervals in the front-rear direction. 7. The loading / unloading device according to claim 1, wherein the support member is provided with the rearward inclination restricting means and the upright holding means integrally combined. 8. The loading / unloading device according to claim 7, wherein the support member is provided movably in the front-rear direction on rails fixed in the front-rear direction along both side edges of the loading platform.