JP3028930B2 - Truck transport equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for transferring a load of a lorry having a roller conveyor having a plurality of rotating rollers provided on the floor of a carrier.

[0002]

2. Description of the Related Art Conventionally, there has been known a cargo transfer apparatus provided with a roller conveyor for sliding a load on a cargo bed for the purpose of simplifying the work of loading the cargo loaded on the cargo bed in a lorry. ing. In such a load transfer device, a pair of left and right grooves are generally formed on the floor of the loading platform in the front-rear direction, and a number of rotating rollers are pivotally supported on opposing walls of the grooves. The rotating roller is supported so as to slightly protrude from the groove so as to lift the load sliding on the rotating roller from the floor. However, in the case where the load is pushed to the back side of the loading platform by the rotating roller that is pivotally supported so as to slightly protrude from the concave groove, the load is smoothly sent out by the rotation of the rotating roller, but it is rotatable. When the load is supported on the rotating roller, the load is placed in an extremely unstable state,
If there is a gap between the load and the inner wall of the carrier, the load easily fluctuates due to the inertial force when the vehicle runs, and as a result, the load collides with the carrier and is damaged. In order to prevent such damage to the load, when loading the load, the rotating roller is projected from the concave groove, and after loading is completed,
It is necessary to arrange the roller conveyor so as to be vertically movable so that the rotating roller is immersed in the groove, and to separately provide a driving means for vertically moving the roller conveyor.
For this reason, the bed structure is complicated and the cost is high. Further, a space for mounting the driving means for moving the roller conveyor up and down must be secured, and there is a problem that the capacity of the carrier is limited by the mounting space for the driving means.

An object of the present invention is to solve such a problem, and a load transfer device for a truck in which a roller conveyer for transferring a load can be moved up and down with a simple structure without using driving means. The purpose is to provide.

[0004]

According to a first aspect of the present invention, there is provided a truck for loading a truck having a pair of left and right concave grooves formed in a floor portion of a carrier in the front-rear direction of the carrier and provided with a roller conveyor in the concave grooves. In the object transfer device, a rotatable rotation roller that supports a load on a support frame of the roller conveyor and a rotatable support roller that supports the support frame are pivotally supported, and the roller conveyor is used to support the roller conveyor. A lock means is provided movably in the front-rear direction along the groove, and a lock means for holding the roller conveyor in a state where the roller conveyor is abutted against the rear edge of the groove is provided. An unlocking means for unlocking the locking means by engagement with a load sliding on the rotating roller, and abutting against the load sliding on the rotating roller passing through the unlocking means; A stopper for moving the roller conveyor integrally with the load is formed on the front end side of the support frame, and a support roller is dropped on the bottom of the groove along with the movement of the roller conveyer, so that the support roller is dropped. A concave portion is provided inside the rotary roller so that the rotary roller is immersed therein.

According to the first aspect of the present invention, when the load is loaded on the carrier, the roller conveyor is moved to the rearmost position, and the roller conveyor is held on the carrier by the locking means. In this state, the load is placed on the roller conveyor and pushed forward, whereby the load is slid by the rotating rollers of the roller conveyor. Then, when the load is pushed to a position near the front end of the roller conveyor by the inertial force of the load, the load on the rotary roller and the unlocking means collide, and the lock between the roller conveyor and the bed is released. Thereafter, the load pushed through the unlocking means to the front end of the roller conveyor comes into contact with the stopper. At this time, since the lock between the roller conveyor and the loading platform has been released, the roller conveyor is forwardly integrated with the load by the inertial force of the load sliding on the rotating roller by the supporting roller which is supported by the roller conveyor. The supporting roller of the roller conveyor falls into the concave portion formed on the bottom surface of the concave groove with the movement of the roller conveyor. For this reason, since the roller conveyor descends and the guide roller that is supported by the roller conveyor sinks into the groove, the guide roller becomes lower than the floor of the loading platform,
The load on the roller conveyor is entirely supported by the floor of the carrier.

[0006]

Embodiments of the present invention will be described below with reference to the accompanying drawings. 1 to 4 show an embodiment of the present invention. In the drawings, reference numeral 1 denotes a box-type bed mounted on the rear part of a lorry. Opening portions 2 and 3 are formed, and the rear opening portion 2 is opened and closed by a double door (not shown), while the side opening portion 3 is opened and closed by a sliding-type sliding door 4. . Reference numeral 5 denotes a pair of left and right concave grooves formed on the floor 1A of the loading platform 1. The concave grooves 5 are formed in a U-shaped cross section with an open upper surface, and extend along the longitudinal direction of the loading platform 1. Formed before and after. Roller conveyor 10 arranged inside this concave groove 5
Is composed of a support frame 11, a plurality of rotating rollers 12 supported on the upper side of the support frame 11, and a plurality of support rollers 13 supported on the lower side of the support frame 11. Further, the support frame 11
Has a structure in which a connecting pipe 15 is stretched between a pair of left and right receiving plates 14, and the rotating roller 12 and the supporting roller 13 are interposed between the receiving plates 14 so as to slightly protrude from the upper end and the lower end of the supporting frame 11. It is pivoted. In addition, the rotating roller 12 pivotally supported on the upper side of the support frame 11 transfers the pallet P on which the load is placed,
Although they are rotatably supported by the support frame 11 close to each other, the support rollers 13 supported by the lower side of the support frame 11 simply support the support frame 11 and move freely. In order to be able to do so, it is pivotally supported at a total of three places, that is, before and after the support frame 11 and at the middle part. Further, the support frame 11 of the roller conveyor 10 is formed to have substantially the same width as the groove 5, but the entire length thereof is formed shorter than the groove 5. When the roller conveyor 10 is disposed inside the groove 5, The roller conveyor 10 is configured to move in the front-rear direction along the concave groove 5.

Next, the lock structure of the roller conveyor 10 will be described with reference to FIGS. As shown in FIG. 3, a pair of left and right lock levers 20 bent in a U-shape are rotatably supported at the front end side of the support frame 11. The lock lever 20 has a central portion pivotally supported by a shaft 21. At the upper end of the lock lever 20, an engagement roller 22 serving as an engagement release means is provided with a shaft extended over the lock lever 20.
A receiving roller 25 is rotatably mounted on a shaft 26 which is rotatably mounted on the shaft 23 and which extends over a lower end portion of the lock lever 20. A wedge-shaped engaging projection 24 that engages with the receiving roller 25 is protruded from the bottom surface 5A of the concave groove 5, and the engaging projection 24 and the receiving roller 25 constitute locking means. Further, the shaft 21 for supporting the lock lever 20 is provided.
The torsion spring 28 for urging the lock lever 20 in the clockwise direction is provided, and the torsion spring 28 applies a rotational force to the lock lever 20 to urge the receiving roller 25 down. Thereby, the receiving roller 25 is always pushed down to a position where it engages with the engaging projection 24, and the engaging roller 22 pivotally supported on the upper end side of the lock lever 20 is projected onto the rotating roller 12, and The engaging roller 22 and the pallet P on which the load W sliding on the rotating roller 12 is put in contact. Then, the engaging roller 22 comes into contact with the pallet P (the load W), and thereafter, when the pallet P passes over the engaging roller 22, the pallet P
When the lock lever 20 is pressed down, the engagement between the receiving roller 25 and the engagement projection 24 is released. And
The bottom surface 5A of the concave groove 5 has an engagement state between the engagement roller 22 and the engagement protrusion 24, that is, a shaft at the lower end side of the roller conveyor 10 with the roller conveyor 10 positioned at the rearmost position. A recess 30 is formed at a position adjacent to the front of the supporting roller 13 that is supported. The concave portion 30 is gently inclined toward the front side and rises vertically at the front end, and has a depth of at least a depth supported by the upper end of the roller conveyor 10 with the support roller 13 fitted in the concave portion 30. The roller 12 is formed so as to be immersed in the concave groove 5 so that the rotating roller 12 is lower than the floor 1A of the carrier 1. A stopper 35 having an L-shaped cross section is fixed to the front end of the support frame 11 so as to be in contact with the pallet P passing through the engagement roller 22.

The operation of the present invention configured as described above will be described. First, when the pallet P on which the load W is loaded is loaded on the carrier 1, the roller conveyor 10 is moved to the rearmost portion, and the receiving roller 25 and the concave groove 5 which are supported at the lower end of the lock lever 20 are formed. The roller conveyor 10 is held on the carrier 1 by engaging with the abutment portion 24. In this state, the pallet P on which the load W is placed is placed on the roller conveyor 10 and is pushed forward (in the direction of arrow A in FIG. 1) so that the pallet P is rotatably supported by the roller conveyor 10. , And moves to the back side of the carrier 1.
Then, the pallet P is moved by the inertia force to the roller conveyor 10.
Pallet P and the engaging roller 22 abut against each other, the engaging roller 22 is pushed down by the pallet P, and accordingly the lock lever 20 moves the shaft 21 against the torsion spring 28. It rotates in the counterclockwise direction (the direction of arrow B in FIG. 3) as the center, the receiving roller 25 is disengaged from the engaging projection 24, and the lock between the carrier 1 and the roller conveyor 10 is released.
At the same time, it passes through the engagement roller 22 and
The pallet P loaded with the load W extruded to the front end of 10 comes into contact with the stopper 35. At this time, since the engagement between the engaging projection 24 and the receiving roller 25 has been released, the roller conveyor 10 is pushed out to the rear side of the loading platform 1 by the support roller 13 that is supported at the lower end of the roller conveyor 10. The load W is moved forward by the inertia force of the load W and the support roller 13 of the roller conveyor 10 is formed in the bottom surface 5A of the groove 5 by the movement of the roller conveyor 10. Depressed. For this reason, the roller conveyor 10 descends, and the rotating roller 12 pivotally supported on the upper end side of the roller conveyor 10 sinks into the concave groove 5, and the rotating roller 12 becomes lower than the floor 1 </ b> A of the carrier 1. Thereby, the pallet P on which the load W supported by the roller conveyor 10 is placed is supported by the floor 1A of the carrier 1. When the load W loaded on the loading platform 1 is to be unloaded, the slide door 4 is opened and the load W is loaded from the side opening 3.
Take out. Then, after completely lowering the load W in the loading platform 1, the roller conveyor 10 is moved to the rearmost portion, and the receiving roller 25 pivotally supported at the lower end of the lock lever 20 and the engaging protrusion 24 formed in the concave groove 5 are formed. Are set to be engaged. This operation is performed manually.

As described above, the load transfer device of the present invention
Utilizing the inertial force of the load W transferred by the roller conveyor 10, the engagement between the engaging projection 24 and the receiving roller 25, that is, the engagement between the roller conveyor 10 and the carrier 1 is released, and the carrier 1 is loaded on the carrier 1. Immediately before the articles W are loaded, the support rollers 13 of the roller conveyor 10 are dropped into the concave portions 30 to lower the roller conveyor 10 as a whole, thereby rotating the rotating rollers 12 for sliding the articles W on the floor 1A of the loading platform 1. It can be immersed in a lower position. Therefore, when loading the load W, the load W can be carried in by the roller conveyor 10 with a light force, and immediately before the loading operation of the load W is completed,
The roller conveyor 10 for transferring the load W is automatically lowered, and the load W loaded on the loading platform 1 can be stably accommodated.
It is possible to reliably prevent the load W from being damaged during traveling or the like. In addition, the roller conveyor 10 is disengaged from the loading platform 1 by utilizing the inertia of the load W moving on the roller conveyor 10, and further, the load W and the roller conveyor 10 are moved in unison, and the roller conveyor 10 is moved. By dropping the support roller 13 pivotally supported by 10 into the recess 30 of the floor 1A,
Since the roller conveyor 10 is entirely lowered, no special driving means for lowering the roller conveyor 10 is required, and the structure can be simplified. Moreover, since the roller conveyor 10 is automatically lowered simply by pushing out the load W, there is no need to lower the roller conveyor 10 and the loading operation of the load W is easy. Since there is no restriction on the driving means for moving the conveyor 10 up and down, the carrier 1 can be effectively used as a storage space for loads.

As described above, one embodiment of the present invention has been described in detail. However, the present invention is not limited to the above embodiment, and various modifications can be made within the scope of the present invention. For example,
A partitioning wall may be provided inside and behind the loading platform,
The basic structure of the carrier may be appropriately selected, such as opening and closing the rear opening with a shutter-type door or a vertically-folding door, or omitting the side opening. In addition, the basic configuration of the roller conveyor, such as the number of support rollers and the support frame structure,
Alternatively, the configuration of the lock means between the roller conveyor and the carrier and the lock release means may be appropriately selected.

[0011]

According to the first aspect of the present invention, a pair of left and right concave grooves are formed in the floor portion of the loading platform in the front-rear direction of the loading platform, and the load transfer of a truck having a roller conveyor provided in the recessed grooves. In the apparatus, a rotatable rotation roller for supporting a load on a support frame of the roller conveyor and a rotatable support roller for supporting the support frame are pivotally supported, and the roller conveys the roller groove by the support rollers. And a lock means for holding the roller conveyor in a state where the roller conveyor is abutted against a rear end edge of the concave groove, and the rotating roller is provided near a front end of the support frame. An unlocking means for releasing the locking means by engagement with a load sliding on the upper part, and the roller which passes through the unlocking means and collides with the load sliding on the rotary roller; A stopper for moving the conveyor integrally with the load is formed at the front end side of the support frame, and a support roller is dropped into the bottom of the concave groove along with the movement of the roller conveyor so that the inside of the concave groove is formed. Is provided with a concave portion for immersing the rotating roller in the roller conveyor, so that the roller conveyor is entirely lowered just before loading of the load on the loading platform is completed by using the inertial force of the load transferred by the roller conveyor. Therefore, it is possible to reliably prevent the load from being damaged during traveling or the like.

[Brief description of the drawings]

FIG. 1 is a sectional view of a carrier showing one embodiment of the present invention.

FIG. 2 is an enlarged cross-sectional view of the vicinity of the concave groove.

FIG. 3 is an enlarged sectional view of the vicinity of the lock lever according to the first embodiment;

FIG. 4 is an enlarged plan view of the vicinity of the lock lever according to the first embodiment;

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 loading platform 1A floor 5 concave groove 5A bottom 10 support frame 12 rotating roller 13 support roller 22 engaging roller (disengaging means) 24 engaging projection (locking means) 25 receiving roller (locking means) 30 recess 35 stopper W Load

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A 3-21014 (JP, U) JP-A 49-52210 (JP, U) JP-A 48-53080 (JP, U) JP-Sho 43- 18321 (JP, Y1) (58) Field surveyed (Int. Cl. ⁷ , DB name) B60P 1/52

Claims (1)

(57) [Claims] 1. A load transporting device for a lorry having a pair of left and right concave grooves formed on a floor portion of a loading platform in a front-rear direction of the loading platform and provided with a roller conveyor in the recesses. A rotatable rotation roller for supporting a load and a rotatable support roller for supporting the support frame are supported, and the roller allows the roller conveyor to move in the front-rear direction along the groove. And, and
Locking means is provided for holding the roller conveyor in a state in which it abuts against the rear edge of the groove, and the locking means is engaged with a load sliding on the rotating roller near the front end of the support frame. A lock releasing means for releasing, and a stopper for moving the roller conveyer integrally with the load by colliding with the load sliding on the rotary roller passing through the lock release means at a front end side of the support frame. A freight car provided with a concave portion on the bottom surface of the concave groove, in which the support roller is lowered with the movement of the roller conveyor and the rotary roller is immersed in the concave groove. Load transfer device.