JP7280755B2 - Stopper device in loading platform lifting device - Google Patents

Description

The present invention relates to a lifting device for a loading platform provided on the vehicle body of a vehicle such as a truck for loading and unloading cargo between the vehicle body and the ground. The present invention relates to a stopper device that is received on a table to prevent its falling.

Conventionally, in a tailgate (load receiving platform lifting device) equipped on a loading platform of a truck, etc., a hinge 5H is fixed to a stopper 5 for preventing cargo from falling and a stopper accommodating recess 5R, and the stopper 5 is accommodated via the hinge 5H. A configuration that is rotatable with respect to the recess 5R is disclosed [see FIG. 5] (see Patent Document 1 below).

Japanese Patent No. 6143302

However, in Patent Document 1, one hinge 5H is provided on the side of the stopper 5 and one on the side of the stopper housing recess 5R. The 5H shaft is cantilevered and receives force, and there is a risk that the shaft will bend.

This is because when the stopper 5 receives a rearward force from the wheel, the shaft receives a force that tends to rotate around the portion of the stopper that is in contact with the top surface of the load-receiving table on the base side.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a novel stopper device for a loading platform lifting device for a vehicle, which solves the above-mentioned problems by preventing unnecessary force from acting on the hinge connecting portion and the stopper. It is intended.

In order to achieve the above object, the invention of claim 1 is provided with a loading platform on the loading platform, and the loading platform is moved up and down between the loading platform and the ground in a horizontal state to move the cargo on the loading platform between the loading platform and the loading platform. In a loading/unloading device for loading/unloading between platforms, the load-receiving platform is changeable between an operating position in which it stands on its upper surface via a hinge connecting part and a storage position in which it is stored inside. A cart stopper is provided, and the hinge connecting portion includes an upper hinge portion fixed to the cart stopper, a lower hinge portion fixed to the load receiving base , and rotatably connecting the upper hinge portion and the lower hinge portion. The lower hinge portion is arranged so as to sandwich the upper hinge portion and is fixed to the load receiving platform by a pair of left and right arm portions, and the arm portions are connected to each other by a plate-like portion. The upper hinge portion is fixed to the cart stopper by means of fasteners such as bolts and nuts. When the cart stopper is in the retracted position, the fastener overlaps with the plate-like portion and is fixed to the cart stopper . The upper surface of the plate-like portion overlapping with the fixture is located at a position lower than the lower end of the fixture at the retracted position, and when the cart stopper at the retracted position is viewed from the axial direction of the rotating shaft, the plate-like portion overlaps with the fixture. A first feature is that in the region where the fixture is located, the arm of the lower hinge part has a top surface higher than the lower end of the fixture in the retracted position.

In order to achieve the above-mentioned object, the invention of claim 2 is the one according to claim 1 , wherein the plate-like portion is positioned below the rotation shaft, and the upper hinge portion is configured to: A second feature is that it is fixed to the cart stopper by a fixture, and the fixture overlaps with the plate-like portion in a plan view.

According to the first aspect of the invention, the lower hinge portion is arranged so as to sandwich the upper hinge portion, and the upper hinge portion and the lower hinge portion are connected by the rotation shaft, so bending of the rotation shaft is suppressed. In addition, the assembling workability of the stopper device can be improved. In addition, since the arms of the lower hinge portion sandwiching the upper hinge portion are integrally connected by the plate-shaped portion , misalignment of the holes through which the rotating shafts of the lower hinge members pass is prevented, and the rotating shaft can be easily passed. can do.

In addition , the upper hinge is fixed to the cart stopper by means of fasteners such as bolts and nuts. The upper end of the portion is positioned lower than the lower end of the fixture in a side view of the cart stopper in the retracted position, while the fixture is positioned when the cart stopper in the retracted position is viewed in the axial direction of the rotation shaft. In the region where the arm of the lower hinge is located, the upper surface of the arm is higher than the lower end of the fixture in the retracted position, so that when the cart stopper is retracted, the position of the hinge connection and the fixture of the upper hinge is increased. It is possible to increase the distance from the part to be fixed, and even if a long fixing tool is used, it becomes difficult to interfere, and the degree of freedom in selecting the fixing tool can be increased.

According to the second aspect of the invention, it is possible to suppress interference between the fixture and the plate-like portion while suppressing reduction in the thickness of the plate-like portion.

Rear side view of a truck equipped with a stopper device in the load receiving platform lifting device of the present invention 2 arrow enlarged plan view of FIG. Perspective view of cart stopper Enlarged perspective view of the portion enclosed by the virtual line in FIG. Exploded perspective view of hinge joint Enlarged view of virtual line 6 in FIG. Enlarged view of 7 arrow virtual line in FIG. Sectional view of cart stopper retracted along line 8-8 in FIG. The same sectional view as FIG. 8 when the cart stopper is upright Sectional view along line 10-10 in FIG. Sectional view along line 11-11 in FIG. Sectional view along line 12-12 in FIG. Sectional view along line 13-13 in FIG.

Embodiments of the present invention will be specifically described below with reference to the accompanying drawings.

This embodiment is a case in which the stopper device of the present invention is implemented in a load receiving platform lifting device having an underfloor retractable load receiving platform.

FIG. 1 is a rear side view of a truck equipped with the stopper device of the present invention. In FIG. A doorway 4 that is opened and closed by a rear door (not shown) is opened on the rear surface. A loading platform lifting device that can be stored under the floor of the loading box 2 is supported on the rear portion of the vehicle body frame 1 so as to be movable in the front-rear direction. A support frame 5 is supported at the rear portion of the body frame 1 so as to be movable in the longitudinal direction of the body frame 1 . Bases of a main arm 6 and a sub arm 7 are pivotally supported on the support frame 5 so as to be vertically swingable, and a base frame 9 of a load receiving table 8 is connected to the tip of these arms 6 and 7 . Both ends of a lifting hydraulic cylinder 10 are connected between the support frame 5 and the tip of the main arm 6 . The cargo receiving table 8 can be moved up and down by the expansion and contraction of the lifting hydraulic cylinder 10 as indicated by the solid line and the chain line in FIG. , and the load-receiving table 8 in the lowered position as indicated by the dashed line can be stored under the floor of the cargo box 2 .

The load-receiving table 8 comprises a base-side load-receiving table 8A integrally provided with the support frame 5, and a front-side load-receiving table 8B which is foldably connected to the free end of the base side load-receiving table 8B by means of a hinge shaft 11. FIG. As shown in FIG. 2, the tip side load receiving platform 8B can be inverted and folded around the hinge shaft 11 so as to overlap the base side load receiving platform 8A.

Since the lifting device for the load receiving table 8 and the storage device for storing the cargo box 2 under the floor are conventionally known, detailed description thereof will be omitted.

Moreover, although not shown, the load receiving platform 8 may be stored on the loading platform 3 of the loading box 2 .

As shown in FIGS. 1 and 2, the load-receiving table 8 consists of a base-side load-receiving table 8A and a front-side load-receiving table 8B which is foldably connected to the tip of the base-side load-receiving table 8B by means of a hinge shaft 11. They are formed by extrusion molding, and their left and right side edges are bordered by bordering members 12 .

Stopper devices ST are provided on the left and right sides of the longitudinal center line CC of the vehicle for the front side load receiving platform 8B. (see FIG. 9) of a cart) to prevent them from falling during the lifting and lowering of the receiving platform 8. - 特許庁

The front-side load receiving platform 8B has a flat portion F that constitutes its main portion, and a slope portion S that is integrally continuous with the rear end (tip) of the flat portion F. The upper surface of the flat portion F is flat. The upper surface of the slope portion S is formed as a flat surface with a downward slope from the front end to the rear end.

As shown in FIG. 3, a strip-shaped stopper accommodating recess 16 is formed in the left-right direction at the intermediate portion in the front-rear direction of the load receiving base 8 (front-side load receiving base 8B). A cart stopper 15 is accommodated.

A rotation shaft (hinge shaft) 18 of a hinge connecting portion H, which will be described later, extends along the width direction of the load-receiving table 8 and is provided along the longitudinal direction of the cart stopper 15 at the bottom of the stopper housing recess 16. The stopper 15 is rotatable about the rotating shaft 18 between a lying down position (storage position) and a standing position (operating position). When the cart stopper 15 is erected, its tip can receive a load such as the wheel W of the cart on the load receiving platform 8.例文帳に追加The cart stopper 15 has sufficient strength so as not to be deformed or damaged by the load from the load, and is formed so as not to hinder loading and unloading of the load on the load receiving platform 8. It is

As shown in FIGS. 4 to 9, the bottom of the stopper housing recess 16 is formed with an upper stepped portion 16u, a lower stepped portion 16d lower than the upper stepped portion 16u, and a stepped portion 16s formed therebetween.

As shown in FIG. 3 , in the stopper housing recess 16 , a plurality (three) of hinge connecting portions H for hinge-connecting the cart stopper 15 so as to be able to rotate in the vertical direction are arranged in the longitudinal direction of the stopper housing recess 16 . (laterally) spaced apart. A hanger spring 28 made of a U-shaped bent spring material is housed in the stopper housing recess 16 so as to straddle the hinge connecting portion H located in the middle thereof and bias the cart stopper 15 to the upright position. there is That is, the hanger spring 28 and the hinge connecting portion H (the center of the three in FIG. 3) are provided side by side.

The base end of the hanger spring 28 engages a hook-shaped lower engaging recess 24 formed in the bottom wall of the stopper housing recess 16 , and the free end engages a hook-shaped upper engaging recess formed in the rear surface of the cart stopper 15 . 25, and the resilient force of hanger springs 28 urges the cart stopper 15 to the upright position. Since the hanger spring 28 is arranged so as to straddle the central hinge connecting portion H of the three, the biasing force of the hanger spring 28 is directly applied to the central hinge connecting portion H.

Since the hanger springs 28 are not provided on the hinge connecting portions H at both ends of the three, the urging force thereof indirectly affects them.

Since the plurality of hinge joints H have the same structure, one of them will be mainly described with reference to FIGS. , and includes a rotating portion (upper hinge portion) 20 and a fixed portion 21 (lower hinge portion). The step from the fixed portion 21 of the hinge connecting portion H to the rotating portion 20 is separated from the step from the lower portion to the upper portion of the stopper housing recess 16 . A step portion 16s formed by the upper step portion 16u and the lower step portion 16d of the stopper housing recess 16 allows the hanger spring 28 to be inserted into the gap formed by the fixed portion 21 and the rotating portion 20 of the hinge connecting portion H. Since it can be arranged, it is possible to adjust the size of the clearance for arranging the hanger spring 28 at the time of assembly, compared to forming a dent for arranging the hanger spring in either the hinge connection portion H or the stopper accommodating recess 16 .

As shown in FIG. 5, the rotating portion 20 of the hinge connecting portion H is provided along the rear surface of the cart stopper 15 and is fixed to the cart stopper 15 by a pair of bolts and nuts 22,22. On the other hand, the fixing portion 21 of the hinge connecting portion H is a plate-like portion 21₁ and a pair of left and right arm portions 21 integrally connected to the left and right thereof₂ , 21₂ is formed in a block shape havingarm 21 ₂ , 21 ₂ is fixed to the load receiving platform 8 by a pair of bolts and nuts 23, 23.A pair of left and right arm portions 21₂ , 21₂ extend parallel to each other and are slanted upwards. The fixed portion 21 and the rotating portion 20 are rotatably connected by the rotating shaft 18 passing through them.

Arm portions 21 ₂ and 21 ₂ of a fixed portion (lower hinge portion) 21 sandwiching a rotating portion (upper hinge portion) 20 are connected by a plate-like portion 21 ₁ . A bolt/nut 22 (fixing tool) for fixing the cart stopper 15 and the rotating portion (upper hinge portion) 20 overlaps the plate-like portion 21 ₁ in plan view of the cart stopper 15 . The plate-like portion 21 ₁ is positioned lower than the arm portions 21 ₂ and 21 ₂ that are the other lower hinge portions 21 . The plate-like portion 21 ₁ is arranged below the rotating shaft 18 . The upper hinge part 20 is fixed to the stopper 15 with the fixture 22 . Interference between the fixture and the plate-like portion can be suppressed while suppressing reduction in the thickness of the plate-like portion 21 ₁ .

As described above, the cart stopper 15 accommodated in the stopper accommodating recess 16 of the load receiving platform 8 is moved from the lying down position (FIG. 8) to the standing position around the rotating shaft 18 by the plurality of (three) hinge connecting portions H. (FIG. 9) It is possible to turn up and down between them.

Between the tip of the cart stopper 15 and the stopper housing recess 16 of the load receiving table 8, a stopper deformation restraining structure is provided for restraining the cart stopper 15 from being displaced in the front-rear direction and restraining the deformation of the cart stopper 15. - 特許庁be done.

Next, referring to FIGS. 8 and 9, this stopper deformation prevention structure will be described.

As described above, the cart stopper 15 can be rotated around the pivot shaft 18 extending in the width direction of the load receiving platform 8 to change its posture between the upright position and the retracted position. , a protrusion 15a having a triangular cross section is formed to protrude toward the rear side thereof, and the protrusion 15a has a first inclined surface 15 ₁ that slopes downward from front to rear in the vehicle front-rear direction. A second inclined surface 15 ₂ is formed that slopes upward from the front to the rear in the longitudinal direction of the vehicle. A concave portion 16a having a triangular cross section is formed opposite to the portion, and the concave portion 16a is provided with a first inclined receiving surface which can face the first inclined surface _15.sub.1 and the second inclined surface _15.sub.2 , respectively. A surface 16 ₁ and a second inclined receiving surface 16 ₂ are formed.

As described above, the vertical portion 15v extends in a direction perpendicular to the imaginary line L. As shown in FIG. Therefore, when the cart stopper 15 is retracted, even if the vertical portion 15v protrudes upward from the load receiving platform 8 due to a dimensional error and the worker's foot hits the vertical portion 15v, the force is directed toward the center of rotation. easy. As a result, it is possible to prevent a force from being applied to the cart stopper 15 in the erecting direction, thereby preventing an unnecessary load from being applied to a stopper lock device LO, which will be described later.

The first inclined receiving surface 16 ₁ is positioned below the first inclined surface 15 ₁ of the retracted position of the cart stopper 15 and is a surface that slopes downward from front to rear. ₂ is a surface located below the second inclined surface 15 ₂ of the retracted position of the cart stopper 15 and inclined upward from front to rear. Then, as shown in FIG. 8, the contact between the first inclined surface 15 ₁ and the first inclined receiving surface 16 ₁ prevents the cart stopper 15 from shifting forward and the second inclined surface 15 ₂ . and the second inclined receiving surface 16 ₂ , it is possible to prevent the cart stopper 15 from shifting backward. As a result, it is possible to suppress the deformation of the rotating shaft 18 of the cart stopper 15 due to the force applied in the front-rear direction.

As shown in FIG. 8, the cart stopper 15 is provided with inclined surfaces in the order of a first inclined surface 15 ₁ , a second inclined surface 15 ₂ and a first inclined surface 15 ₁ from the front. The stopper housing recess 16 has inclined surfaces in the order of a first inclined receiving surface 16 ₁ , a second inclined receiving surface 16 ₂ and a first inclined receiving surface 16 ₁ from the front.

As a result, the cart stopper 15 has a convex portion formed by the adjacent first and second inclined surfaces 15 ₁ and 15 ₂ and a concave portion formed by the second and first inclined surfaces 15 ₂ and 15 ₁ . A concave portion is formed by _the adjacent first and second inclined receiving surfaces 16 ₁ and 16 ₂ , and a convex portion is formed by the second and first inclined receiving surfaces 16 2 and 16 ₁ . Since the concave and convex portions are fitted to each other, it is possible to more reliably prevent the cart stopper 15 from being shifted back and forth.

As shown in FIGS. 8 and 9, the tip (free end) of the cart stopper 15 is formed with a vertical portion 15v extending vertically downward from the upper surface thereof. A lower end d of the vertical portion 15v is located above an imaginary line L extending from the center of the rotating shaft 18 in parallel with the upper surface of the load receiving platform 8. As shown in FIG. As a result, when the cart stopper 15 rotates about the rotating shaft 18 from the retracted position to the upright position, the lower end d of the vertical portion 15v always moves rearward of the load receiving table 8, so that the cart stopper 15 is retracted. There is no need to provide a recessed space for avoiding interference with the cart stopper 15 on the front side of the stopper storage recess 16, and the strength of the stopper storage recess 16 can be increased. The upper surface U of the cart stopper 15 is formed with unevenness 15b for slip prevention. In other words, the upper surface U of the cart stopper 15 is a valley of unevenness.

In addition, when the valley becomes a point when viewed from the side (viewpoint of FIG. 8), the line connecting the points becomes the upper surface.

The vertical portion 15v extends in a direction perpendicular to the imaginary line L. As shown in FIG. Therefore, when the stopper is retracted, even if the vertical portion protrudes upward from the load receiving table due to a dimensional error and the worker's foot hits the vertical portion, the force is likely to be directed toward the center of rotation. As a result, force is applied in the direction in which the stopper is erected, thereby suppressing unnecessary load from being applied to the stopper lock device.

A rubber cushion 29 having a circular cross section fitted to the convex portion 15a reduces shock and impact noise when the convex portion 15a and the concave portion 16a of the load receiving table 8 come into contact with each other. A rubber cushion 27 is also provided at the rear end corner of the stopper accommodating recess 16, and when the cart stopper 15 is raised and rotated, the base of the cart stopper 15 abuts against the rubber cushion 27, causing a shock and impact noise at that time. mitigate

A pair of locking means LO, LO for locking or unlocking the cart stopper 15 in the lying down position (storage position) is provided on both sides of the stopper housing recess 16 in the left-right direction. Since the paired lock means LO, LO have the same structure, the structure of the left lock means LO will be mainly described below with reference to FIGS. 7 and 11-13.

The locking means LO includes an engaged member 30 fixed to the rear surface of the cart stopper 15, an engaging member 31 that can be engaged with and disengaged from the engaged member 30, and an operating mechanism 32 that operates the engaging member 31. It consists of The engaged member 30 is vertically provided integrally with a support member 33 bolted to the rear surface of the cart stopper 15 and formed in a U shape. On the other hand, the engaging member 31 is formed in a bar shape with a square cross section having an inclined guide surface 31a that descends forward on the upper surface of the tip portion that can be engaged with and disengaged from the engaged member 30 at the tip. The operating mechanism 32 is configured such that the engaging member 31 can be manually slid forward and backward with respect to the engaged member 30 so as to engage and disengage therefrom. A base 36 is fixed to the bottom plate 35 below the stopper housing recess 16, and a hollow rectangular tubular member 38 is fixed to the upper surface of the base 36 near the engaged member 30. An engaging member 31 is inserted so as to slide back and forth with respect to the engaged member 30 . A first biasing means 40, that is, a first compression coil spring is provided in compression between the rear end wall of the rectangular tubular member 38 and the rear end of the engaging member 31. This first biasing means The elastic force of 40 always urges the engaging member 31 in the direction of protruding, that is, in the direction of engaging with the engaged member 30 . In addition, a guide rod 41 is inserted along the central axis of the rectangular tube member 38 through a through hole opened in the rear end wall of the rectangular tube member 38. A first biasing means 40 made of a spring is inserted into a dead-end guide hole 43 formed along the central axis of the engaging member 31 so as to be slidable. An elongated hole 44 is formed in the intermediate portion of the engaging member 31 along its longitudinal direction, and an engaging pin 46 fixed laterally in the middle of the guide rod 41 is slidably inserted into the elongated hole 44. engaged. Therefore, as shown in FIGS. 12 and 13, the engaging member 31 is moved forward, i.e., forward, until the engaging pin 46 engages the rear end of the elongated hole 44 due to the resilient force of the first compression coil spring 40 . It is biased so as to protrude toward the engaged member 30 . A large-diameter boss portion 41a is integrally formed at the rear end of the guide rod 41 protruding rearward from the rectangular tubular member 38, and the end surface of the boss portion 41a serves as a second biasing means to be described later. The elastic force of the second compression coil spring 54 (having a greater spring force than the first compression coil spring 40) abuts against the rear end face of the rectangular tubular member 38, thereby restricting the position of the guide rod 41. As shown in FIG. A boss portion 41a at the rear end of the guide rod 41 is screwed with the tip of an operating rod 48 made of a long bolt on the same axis as the guide rod 41, and integrally connected via a length adjusting mechanism 49. be done. The length adjusting mechanism 49 includes a female threaded hole 49a formed in the boss portion 41a, a male thread 49b formed in one end of the operating rod 48 and screwed into the female threaded hole 49a so as to be adjustable in length, and the male thread 49b. It is composed of a nut 49c that is screwed into contact with the outer end of the boss portion 41a.

The operating rod 48 extends beyond the cart stopper 15 to below the operating frame 13 on the side edge of the load receiving platform 8, and the extension is fixed to the base 36 via a sleeve 50 fitted therein. It is slidably supported through the bearing 51 . The outer end of the sleeve 50 is widened and engaged with the head of the outer end of the operating rod 48, which is a long bolt, by the elastic force of a second biasing means, that is, a second compression coil spring 54. , and the actuating rod 48 and sleeve 50 can move outward together. A second biasing means having a spring force larger than that of the first biasing means 40 is provided between the spring seat 53 fitted on the operating rod 48 and seated on the nut 49c and the edge of the bearing 51. That is, the second compression coil spring 54 is compressed, and this second compression coil spring 54 elastically urges the engaging member 31 in the projecting direction via the operating rod 48 and the guide rod 41. ing.

A lever sleeve 57 is integrally provided on the outer circumference of the sleeve 50 between the bearing 51 and the end edge of the operating rod 48, and an operating lever 56 as an upwardly extending operating member is fixed. A gate-shaped operation panel 58 is fixed so as to surround the operation lever 56, and the upper surface of this operation panel 58 passes through an opening of the operation frame 13 fixed to one side of the front side load receiving base 8B. A guide groove 60 is formed on the upper surface of the guide groove 60, and the operation lever 56 passes through the guide groove 60. The operation lever 56 passes through the opening of the operation frame 13 and passes through the front side load receiving table 8B. It can be operated from above.

The guide groove 60 is provided with a second spring for locking the operating lever 56 at the unlocked position (retracted position of the engaging member 31) against the resilient force of the first and second compression coil springs 40, 54. On the side opposite to the first groove portion 60a and the first groove portion 60a, the operation lever 56 is moved to the lock position (advance position of the engaging member 31) by the elastic forces of the first and second compression coil springs 40 and 54. ) and has an axial length that allows movement to the unlocked position. An inclined cam surface 60c for guiding is formed between the grooves 60a and 60b, and one end of the inclined cam surface 60c faces the inside of the second groove 60b.

As shown in FIG. 11, the operating lever 56 is formed of a horizontally elongated rectangular cylinder, and has a rectangular first operating surface 56a at its upper end and a second rectangular operating surface 56b at one side thereof. ing.

When the truck is stopped and the cargo in the cargo box 2 is unloaded on the ground, the cargo receiving platform 8 is raised to the same level as the loading platform 3 of the cargo box 2 as shown by the solid line in FIG. The platform 8B is manually rotated to the extended position. Next, when the second operating surface 56b of the operating lever 56 in the retracted position is kicked with a foot or the like to move it outward, the operating lever 56 is moved by the elastic force of the first and second compression coil springs 40 and 54. Move outward against force. As a result, the actuating rod 48 and the guide rod 41 retreat against the elastic force of the first and second compression coil springs 40 and 54, and the engaging member 31 is retreated and disengaged from the engaged member 30. . As described above, when the cart stopper 15 is held at the unlocked position, the cart stopper 15 rotates upward and is held at the upright position. At this time, since the second operating surface 56b of the operating lever 56 is engaged with the inclined cam surface 60c of the guide groove 60, the urging forces of the first and second compression coil springs 40 and 54 automatically operate the operating lever 56. is returned to the locked position.

Next, the cargo on the cargo platform 3 is transferred to a cart (not shown) and moved onto the cargo receiving platform 8, and the cargo receiving platform 8 is lowered by the operation of the cargo receiving platform lifting device. At this time, the wheels W of the cart come into contact with the lower surface of the tip of the upright cart stopper 15 to prevent the cart from falling from the tip of the load receiving table 8 . When the load receiving platform 8 descends to the ground, it swings to the retracted position by stepping on the protruding cart stopper 15 with a foot or the like. At this time, the engaged member 30 below the cart stopper 15 is pressed against the inclined guide surface 31a of the engaging member 31 in the locked position (protruded position), and this pressing force is divided in the axial direction of the engaging member 31. Since the force causes the engaging member 31 to slide in the backward direction against the urging forces of the first and second compression coil springs 40 and 54, when the engaged member 30 moves below the engaging member 31, , the engaging member 31 released from the pressing force by the engaged member 30 slides forward in the engaging direction by the urging forces of the first and second compression coil springs 40 and 54, and moves to the engaged member 30. can engage. As a result, the cart stopper 15 becomes substantially flush with the upper surface of the front side load receiving table 8B, and the cart on the load receiving table 8 can be lowered to the ground without any trouble.

Next, when loading goods on the ground onto the loading platform 3 of the loading box 2, the first operating surface 56a of the operating lever 56 is kicked from the base side of the loading platform 8 toward the tip side with a foot. , the operating lever 56 is swung upright. Then, the operating lever 56 moves along the inclined cam surface 60c of the guide groove 60, whereby the engaging member 31 is retracted from the locked position to the unlocked position and held there. As a result, the stopper 15 is again held at the upright position by the elastic force of the torsion spring 23 .

A cargo on the ground is put on a cart and traveled onto a cargo receiving table 8.例文帳に追加At this time, when the wheels W of the cart get over the cart stopper 15 against the elastic force of the urging means, the cart stopper 15 is again rotated upward to the upright position by the elastic force of the urging means. , the cart can be locked onto the loading platform 8.

Further, when the cart on the receiving table 8 is pushed toward the packing box 2 and the wheel W goes over the cart stopper 15, the cart stopper 15 is again held at the projecting position. After that, the cargo receiving platform lifting device is operated to raise the cargo receiving platform 8 until it is substantially flush with the loading platform 3 , and the cart can be moved onto the loading platform 3 . At this time, the wheels W of the cart are in contact with the tip of the lower surface of the cart stopper 15 , so that the cart is prevented from falling off the load-receiving table 8 .

As described above, the cart stopper 15 advances or retreats the engaging member 31 by rotating and sliding the operating lever 56 to engage and disengage the engaged member 30, thereby laying down the cart stopper 15 to the retracted position. , or can be erected in the operative position.

Although the embodiments of the present invention have been described above, the present invention is not limited to those embodiments, and various embodiments are possible within the scope of the present invention.

For example, although the load-receiving stand of the load-receiving stand-lifting device has been described as being of an under-floor storage type, the load-receiving stand may be of an upright retractable type, a vertical elevating type, or any other type.

Anti-slip unevenness is formed on the top surface of the load-receiving table and the cart stopper, but the unevenness may be omitted.

3: Loading platform 8: Loading platform 15: Cart stopper 18: Rotating shaft (hinge shaft)
20 Upper hinge portion 21 Lower hinge portion 22 Fastener H Hinge connecting portion

Claims (2)

A loading platform (8) is provided on the loading platform (3), and the loading platform (8) is moved up and down between the loading platform (3) and the ground in a horizontal state to move the cargo on the loading platform (8) to the loading platform (3). ) and a loading platform (8) for loading and unloading,
The load receiving platform (8) is provided with a cart stopper (15) that can change its posture between an operating position standing on its upper surface via a hinge connecting part (H) and a retracted position stored therein. The hinge connecting part (H) consists of an upper hinge part (20) fixed to the cart stopper (15), a lower hinge part (21) fixed to the load receiving platform (8) , and these upper hinge parts (20 ) and a pivot shaft (18) that rotatably connects the lower hinge portion (21) , the lower hinge portion (21) being arranged to sandwich the upper hinge portion (20). The arms (21 ₂ , 21 ₂ ) are fixed to the load receiving platform (8), and the arms (21 ₂ , 21 ₂ ) are connected to each other by a plate-like portion (21 ₁ ),
The upper hinge part (20) is fixed to the cart stopper (15) by means of fasteners (22) such as bolts and nuts. overlaps with the plate-like portion (21 ₁ ), and the upper surface of the portion of the plate-like portion (21 ₁ ) that overlaps with the fixing member (22) is located higher than the lower end of the fixing member (22) at the retracted position. When the cart stopper (15) in the retracted position is viewed from the axial direction of the pivot shaft (18), the lower hinge part (21) is located in the area where the fixture (22) is positioned. A stopper device in a loading platform lifting device, wherein the upper surface of said arms (21 ₂ , 21 ₂ ) is higher than the lower end of said fixture (22) in the retracted position . The plate-like portion (21 ₁ ) is positioned below the pivot shaft (18), the upper hinge portion (20) is fixed to the cart stopper (15) by a fixture (22), 2. The stopper device in the load receiving platform lifting device according to claim 1 , wherein the fixture (22) overlaps the plate-like portion ( ₂₁₁ ) in a plan view.

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