JP2012061905A - Cargo fixing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate, in a cargo fixing device having a function to move an attachment point of a rope laid over cargo loaded on a platform of a vehicle to prevent falling and collapse of the cargo, change of the attachment point on the platform of the rope according to the size, shape or the like of the cargo.SOLUTION: The attachment point on the platform of the rope laid over the cargo loaded on the platform to prevent the falling or collapse of the cargo is moved in the longitudinal direction of the platform in association with a drive for moving the cargo in the longitudinal direction of the platform. The device includes a rope attachment body 3 to which the rope is attached, and a movement feed shaft 2 which drives the movement of the rope attachment body 3 in the longitudinal direction of the platform. The rope attachment body 3 includes a connecting mechanism 3d allowing engagement/disengagement thereof with/from the movement feed shaft 2. The connecting mechanism 3d allows free movement of the rope attachment body 3 along the movement feed shaft 2 by the disengagement from the movement feed shaft 2.

Description

  TECHNICAL FIELD The present invention relates to a freight fixing device having a function of moving an attachment point of a rope loading platform in the front-rear direction of a loading platform, which is passed over cargo loaded on a loading platform of a vehicle and prevents the cargo from being tilted or collapsed. Belonging to.

  Recent vehicles have been equipped with cargo handling devices that allow the loaded cargo to move in the longitudinal direction of the loading platform. With the equipment of this cargo handling device, it has become necessary to make it possible to move the attachment point of the load platform of the rope that is passed over the cargo in the front-rear direction of the load platform.

  Conventionally, for example, a technique described in Patent Document 1 is known as a technique that enables the attachment point of a rope carrier to be moved in the front-rear direction of the carrier.

  Patent Document 1 discloses a guide rail disposed in a front-rear direction (horizontal direction) of a side panel of a loading platform, and a screw rod that is rotatably disposed inside the guide rail and is linked to a drive for moving cargo. And a cargo fixing device including a nut that has a hook to which a rope is attached and is screwed to a screw rod and travels inside a guide rail.

  In the cargo fixing device according to Patent Document 1, when the cargo is moved, the screw rod is rotated in conjunction with the drive for moving the cargo, and hooks (nuts) that are attachment points in the rope loading platform are arranged before and after the loading platform. It is moved in the direction.

JP 2008-213796 A

  In the cargo fixing device according to Patent Document 1, the screw rod and nut assembly structure is fixed and the assembly position cannot be freely changed. Therefore, in the cargo platform of the rope corresponding to the size, shape, etc. of the cargo There is a problem that the attachment point cannot be easily changed.

  The present invention has been made in view of such problems, and provides a cargo fixing device that can easily change the attachment point of a rope carrier in accordance with the size, shape, etc. of the cargo. Is an issue.

  In order to solve the above-described problems, the cargo fixing device according to the present invention employs means described in each of the claims.

  That is, according to the first aspect, the attachment point on the loading platform of the rope which is passed over the cargo in conjunction with the driving for moving the loading platform of the cargo loaded on the loading platform in the longitudinal direction is prevented. In the cargo fixing device moved in the front-rear direction, a rope attachment body to which the rope is attached and a moving feed shaft that drives movement of the rope attachment body in the front-rear direction are provided. On the other hand, a coupling mechanism that enables engagement and disengagement is provided. The coupling mechanism is characterized in that the rope attachment body can be freely moved along the moving feed shaft by being detached from the moving feed shaft.

  In this means, the rope attachment body to which the rope is attached is provided with a coupling mechanism that enables engagement and disengagement with respect to the moving feed shaft. It can be freely moved along the moving feed shaft.

  According to a second aspect of the present invention, in the cargo fixing device of the first aspect, the moving feed shaft has a spiral groove formed in a round bar, and the coupling mechanism is moved forward and backward with respect to the spiral groove of the moving feed shaft to be engaged and disengaged. A slide pin is provided.

  With this means, the connecting mechanism is configured with a simple structure by the slide pin of the connecting mechanism moving forward and backward in and out of the spiral groove of the moving feed shaft.

  According to a third aspect of the present invention, in the cargo fixing device according to the second aspect, the coupling mechanism includes a spring that represses the slide pin in a direction in which the slide pin moves backward with respect to the spiral groove of the moving feed shaft.

  In this means, the connecting mechanism is provided with a spring that elastically presses the slide pin in a direction retreating with respect to the spiral groove of the moving feed shaft, so that the slide pin of the connecting mechanism and the spiral groove of the moving feed shaft are unexpectedly engaged. Is prevented.

  According to a fourth aspect of the present invention, in the cargo fixing device according to the second or third aspect, the coupling mechanism includes a roller that is rotatably attached to the tip end portion of the slide pin and rolls within the spiral groove of the moving feed shaft. It is characterized by.

  In this means, a roller that rolls inside the spiral groove of the moving feed shaft is provided at the tip of the slide pin of the connecting mechanism, so that friction between the slide pin of the connecting mechanism and the spiral groove of the moving feed shaft is reduced. .

  According to a fifth aspect of the present invention, in the cargo fixing device according to any one of the second to fourth aspects, the connection mechanism includes an operation portion that is exposed from the rope attachment body and that operates the slide pin.

  In this means, the operation portion of the connecting mechanism is easily engaged and disengaged by exposing the operating portion of the slide pin of the connecting mechanism from the rope attachment body.

  In the cargo fixing device according to the present invention, a connecting mechanism that enables engagement and disengagement with respect to the moving feed shaft is provided on the rope attachment body to which the rope is attached. And the rope attachment body can be freely moved along the moving feed shaft, so that the attachment point on the rope carrier can be easily changed according to the size, shape, etc. of the cargo. is there.

  Further, as claimed in claim 2, since the connecting mechanism is configured with a simple structure by moving the slide pin of the connecting mechanism forward / backward to / from the spiral groove of the moving feed shaft, the manufacturing cost is reduced. effective.

  Further, as claimed in claim 3, the connecting mechanism is provided with a spring for repressing the slide pin in the direction of retreating with respect to the spiral groove of the moving feed shaft, so that the slide pin of the connecting mechanism and the spiral groove of the moving feed shaft are unexpectedly related. Therefore, unnecessary collision damage of the coupling mechanism and the moving feed shaft is prevented.

  Further, as a fourth aspect of the present invention, a roller that rolls inside the spiral groove of the moving feed shaft is provided at the tip of the slide pin of the connecting mechanism, so that the friction between the slide pin of the connecting mechanism and the spiral groove of the moving feed shaft is reduced. Therefore, the movement of the rope attachment body by the moving feed shaft is driven smoothly.

  Further, as claimed in claim 5, since the operation portion of the slide pin of the coupling mechanism is exposed from the rope attachment body, it becomes easy to engage and disengage the coupling mechanism, so that the cargo loaded on the loading platform is limited. This has the effect of facilitating the operation of changing the attachment point of the rope in the gap.

It is front sectional drawing of the 1st example of the form for implementing the cargo fixing device which concerns on this invention. FIG. 2 is a different state diagram of FIG. 1. It is side surface sectional drawing of FIG. It is a perspective view of the whole vehicle which shows the example of installation of FIGS. 1-3 (a partial enlarged view is included). It is the side view to which the principal part of FIG. 4 was expanded. It is the side view to which the other principal part of FIG. 4 was expanded. It is an enlarged view of the principal part of FIG. It is a cross-sectional view of FIG. It is an enlarged view of the principal part of FIG. 8, (A), (B) shows the operation state from which the principal part differs. It is a longitudinal cross-sectional view which shows operation | movement of the principal part of FIG. 9, and the operation state to the reverse direction is shown by (A) and (B). It is a top view which shows operation | movement of the principal part in the drive to the one direction of FIG. 9, and (A) and (B) show different operation states. It is a top view which shows operation | movement of the principal part in the drive to the other direction of FIG. 9, and the different operation state is shown by (A) and (B). It is a longitudinal cross-sectional view of the principal part of FIG. It is a side view of the other principal part of FIG. It is a side view of the other principal part of FIG. FIG. 16 is a partially enlarged view of FIG. 15. It is a perspective view of the other principal part of FIG. It is a side view of the principal part of the 2nd example of the form for implementing the cargo fixing apparatus which concerns on this invention.

  EMBODIMENT OF THE INVENTION Hereinafter, the form for implementing the cargo fixing apparatus which concerns on this invention is demonstrated based on drawing.

  FIGS. 1-17 shows the 1st example of the form for implementing the cargo fixing apparatus which concerns on this invention.

  In the first example, as shown in FIG. 4, what is installed in a van type loading platform B of a truck T is shown.

  As shown in FIGS. 1 to 3, the first example is configured with the rail 1, the moving feed shaft 2, and the rope attachment body 3 as main parts, and surrounds the space above the floor surface Ba of the loading platform B together with the top panel Bb. It is installed in the side panel Bc.

  The rail 1 is attached to the side panel Bc of the loading platform B via a plate-shaped reinforcing material 4 and arranged in the front-rear direction of the loading platform B. The rail 1 is mounted on the upper and lower sides of the substrate 1a fixed to the side panel Bc. A traveling path 1b having a U-shaped cross section is provided so as to protrude inward, and the space between both traveling paths 1b is opened. Near the rear end of the rail 1, a cut portion 1 c is provided by removing the traveling path 1 b in order to attach and detach the rope attachment body 3 to and from the rail 1. Two rails 1 are arranged in parallel vertically with a gap therebetween.

  The moving feed shaft 2 is positioned on the lower side inside the rail 1 and is disposed so as to be rotatable in the front-rear direction of the loading platform B, and a spiral groove 2b is formed in a round bar 2a. Since the round bar 2a is formed in a long shape, the round bar 2a is connected and connected by a fitting portion 2c provided with unevenness in the axial direction at the midway portion. The spiral groove 2b is formed in a wide width with a shallow bottom surface 2ba and a space between the side surfaces 2bb, and a relatively long pitch is ensured.

  The rope attachment body 3 is provided with a traveling roller 3b, a chuck 3c, and a coupling mechanism 3d on a base portion 3a that enters between both traveling paths 1b of the rail 1. The base 3 a is adapted to be placed on the moving feed shaft 2 between both travel paths 1 b of the rail 1. The traveling rollers 3b are provided in pairs in the lateral direction (the front-rear direction of the loading platform B) on the top and bottom of the base portion 3a and are rotatably supported, and roll on the inside (side surface) of the traveling path 1b of the rail 1. It is supposed to run. The chuck 3c has a function of holding and holding the hook C attached to the end of the rope R that fixes the cargo with one touch. The coupling mechanism 3d is provided in a pair in the lateral direction to engage and disengage the rope attachment body 3 with respect to the moving feed shaft 2, and is inserted into the support plate 3da fixed to the base portion 3a so as to be slidable in the vertical direction. A roller 3dc engaged and disengaged with respect to the spiral groove 2b of the moving feed shaft 2 is rotatably supported at the lower end of the slide pin 3db, and the slide pin 3db is moved upward between the support plate 3da and the slide pin 3db. A coil spring 3dd, which is a spring that urges and compresses the spring, is provided, and a lever-shaped operation portion 3de that operates sliding in the vertical direction is provided on the slide pin 3db. The roller 3dc of the coupling mechanism 3d is set so as to roll on the side surface 2bb of the spiral groove 2b and not contact the bottom surface 2ba when engaged with the spiral groove 2b of the moving feed shaft 2. Further, the coupling mechanism 3d is provided with an operation guide groove 3df for guiding the operation movement in the vertical direction of the operation unit 3de to be U-shaped in the base 3a, and is cut into the upper portions at both ends of the operation guide groove 3df. A lock groove 3dg for engaging the operation portion 3de is provided.

  As shown in FIG. 4 and subsequent figures, the first example is linked to a cargo handling device that enables the loaded cargo to move in the front-rear direction of the loading platform.

  The cargo handling apparatus includes a conveyor 5, a winding roller 6, a cargo support 7, a moving chain 8, a drive unit 9, a moving feed shaft drive mechanism 10, and a drive transmission mechanism U as main parts.

  As shown in FIGS. 4 and 5, the conveyor 5 is formed in a sheet shape with a lightweight and tough belt (for example, polyamide laminated as a core layer), and the front and rear direction and the width direction (front and rear direction) of the loading platform B. The arrangement surface which becomes the cargo loading surface can be developed on the floor surface Ba of the loading platform B. As shown in FIG. 5, the floor of the conveyor 5 is a floor that supports the load of cargo loaded in the arrangement direction of the conveyor 5 (the front-back direction of the floor surface Ba of the loading platform B) via the conveyor 5. A frame 11 is provided. If necessary, the floor frame 11 is provided with a solid lubricant such as wax that comes into contact with the conveyor 5 in order to make the conveyor 5 move smoothly.

  4 and 5, the winding roller 6 has an axis set in the width direction of the loading platform B and is rotatably installed at the rear end of the floor surface Ba of the loading platform B. 5 is composed of a winding roller body 6a that winds and feeds the conveyor 5, and a winding roller shaft 6b fixed to the winding roller body 6a. A drive transmission sprocket 12 is fixed to the winding roller shaft 6b. A guide roller 13 for guiding the conveyor 5 toward the arrangement surface is installed on the front side of the loading platform B near the winding roller 6.

  As shown in FIGS. 4 and 5, the cargo support body 7 prevents the cargo loaded with a backrest function from collapsing, and is formed in a torii-shaped frame so that the leading end of the conveyor 5 (winding) It is erected at a height up to the vicinity of the top panel Bb of the loading platform B. The cargo support 7 and the leading end of the conveyor 5 are fixed via, for example, a plate-shaped reinforcing bracket extending in the width direction of the loading platform B so that the conveyor 5 does not lean or twist.

  As shown in FIGS. 4 and 5, the moving chain 8 is formed of a link chain meshing with a gear, and is endlessly attached to sprockets 14 and 15 disposed on the front side and the rear side of the floor surface Ba of the loading platform B. 2 are arranged in the front-rear direction of the loading platform B, and two are arranged in parallel in the width direction of the loading platform B. The sprockets 14 and 15 correspond to the two moving chains 8 on the rotary shafts 16 and 17 arranged with the axis lines set in the width direction of the loading platform B on the front side and the rear side of the floor surface Ba of the loading platform B. Thus, a pair with an interval is supported. On the rear side of the loading platform B near the sprockets 14 and 15, an auxiliary sprocket 18 is installed to narrow the vertical distance of the endless reciprocating line of the moving chain 8. A drive transmission sprocket 19 is fixed to the rotary shaft 16 on the rear side of the loading platform B. One portion of the moving chain 8 and the cargo support 7 (the leading end of the conveyor 5) are fixed by a fixing bracket 20.

  As shown in FIGS. 4, 5, 7, and 8, the drive unit 9 is installed at the rear end of the floor surface Ba of the loading platform B and can be switched between forward and reverse rotation directions by a control circuit. Consists of. The drive unit 9 is mounted on a housing 21 that contains a drive transmission mechanism U and encloses lubricating oil, and is unitized with the drive transmission mechanism U so as to be easily mounted on a vehicle.

  As shown in FIGS. 4 and 6, the moving feed shaft drive mechanism 10 drives the moving feed shaft 2 to rotate. The lower sprocket 10a and the lower sprocket 10a are fixed to the front rotating shaft 17 coaxially. The chain 10c is suspended in an endless manner between the upper sprocket 10b and the intermediate sprocket 10b, and the chain 10c is suspended in the middle part of a relay gear 10d such as a bevel gear connected to the round bar 2a of the moving feed shaft 2. ing.

  As shown in detail in FIG. 7 and subsequent figures, the drive transmission mechanism U includes a drive body 22, driven bodies 23 and 24, a cam 25, a one-way clutch 26, and a shutter mechanism 27 as main parts.

  As shown in FIGS. 9 and 14, the drive body 22 is formed by joining a cylindrical cup-shaped casing 22b on both sides of a ring-shaped drive gear 22a in the middle and assembling the hollow body with bolts 22c. As shown in FIG. 9, the casing 22b has a bearing hole 22ba in the center, and three through holes 22bb are radially formed around the bearing hole 22ba at an angle of 120 degrees. A bearing 28 that supports the cam 25 is fixed to the bearing hole 22ba. A sleeve 29 that receives a slide of a pin body 26ba of a clutch pin 26b (to be described later) of the one-way clutch 26 is fixed to the through hole 22bb.

  As shown in FIGS. 9, 15, and 17, the driven bodies 23 and 24 are formed in a disk shape that comes into contact with both end faces (outer side faces) of the casing 22b of the driving body 22, respectively. A total of six oil holes 23b, 24b are drilled in a radial manner at an angle of 120 degrees around the bearing holes 23a, 24a. In the bearing holes 23a and 24a, driven gears 31 and 32, in which a bearing 30 that supports the cam 25 is fixed to the inner periphery, are fixed. The oil holes 23 b and 24 b ensure the circulation of the lubricating oil sealed in the housing 21.

  Therefore, the driven bodies 23 and 24 are arranged on the same axis as the driving body 22 via the cam 25.

  As shown in FIGS. 9 to 13, the cam 25 is disposed so as to penetrate through the driving body 22 and the driven bodies 23 and 24 as stepped fixed shafts in which both end portions which are small diameter portions 25 a are fixed to the housing 21. Thus, a guide groove 25c is provided in the circumferential surface of the large-diameter portion 25b located inside the hollow drive body 22 in the circumferential direction. The guide groove 25c includes two parallel main grooves 25ca and a communication groove 25cb that communicates the main grooves 25ca in an oblique direction. As shown in FIG. 10, the main groove 25ca of the guide groove 25c has a relatively deep groove bottom portion 25caa and a relatively shallow groove bottom portion 25cab, and the deep groove bottom portion 25caa and the groove bottom A step portion 25cac is formed between the shallow portion 25cab and the shallow portion 25cab. The shallow portion 25cab of the groove bottom of the main groove 25ca of the guide groove 25c is formed only at a part close to the side where the connecting groove 25cb intersects the acute angle with respect to the main groove 25ca.

  Therefore, the followers 23 and 24 are supported so as to be rotatable with respect to the cam 25.

  As shown in FIGS. 9 to 13, 15, and 17, the one-way clutch 26 includes a slider 26a, a clutch pin 26b, an elastic member 26c, and a clutch groove 26d. As shown in FIGS. 9 and 13, the slider 26 a includes a deformed ring plate 26 aa, a center hole 26 a that is drilled in the center of the ring plate 26 aa and through which the cam 25 is inserted, and a casing 22 b of the drive body 22 that passes through the slider 26 a. Three sliding holes 26ac that are radially perforated through an angle of 120 degrees in the vicinity of the outer peripheral portion of the ring board 26aa corresponding to the hole 22bb and allow the clutch pin 26b to slide, and a sliding hole 26ab in the ring board 26aa Is a guide hole 26ad having a total of six perforations that are radially spaced from each other at an angle of 120 degrees with an angle of 60 degrees, and both ends are fixed to the casing 22b of the driver 22 through the guide holes 26ad. And six guide shafts 26ae arranged in parallel with the cam 25, and two guide holes adjacent to the ring plate 26aa at an angle of 120 degrees. 6ad and a guide 26af that is slidably supported radially toward the center of the ring plate 26aa and whose tip moves in the guide groove 25c of the cam 25, and guides 26af in the direction of the center of the ring plate 26aa (guide of the cam 25). And a coil spring 26ag that is urged and biased in the direction of the groove 25c). The clutch pin 26b is inserted into the slide hole 26ab of the slider 26a, and has three round rod-shaped pin bodies 26ba having axial lengths that are selectively projected and retracted from the through holes 22bb of the casing 22b of the driver 22; It consists of ring-shaped elastic member receivers 26bb that are respectively fixed slightly toward the center from both ends of the pin body 26ba. The elastic member 26c is formed of a coil spring, and is externally mounted on the pin body 26ba of the clutch pin 26b and is elastically mounted between the elastic member receivers 26bb on both sides of the clutch pin 26b and the ring plate 26aa of the slider 26a. . As shown in FIGS. 15 and 17, the clutch groove 26 d includes oil holes 23 b and 24 b on the contact surface (inner surface) of the driven body 22 of the driven bodies 23 and 24 with the end surface of the casing 22 b in the circumferential direction. It extends in an arc shape and is engaged with the pin body 26ba of the clutch pin 26b. The flat portion 26da has a constant groove bottom depth, and the groove bottom depth is inclined to form a flat portion 26da. It consists of an inclined portion 26db provided only on one end side. In the flat portion 26da of the clutch groove 26, the oil holes 23b and 24b of the driven bodies 23 and 24 are positioned. As shown in FIG. 17, the inclined portion 26db of the clutch groove 26d is disposed opposite to the flat portion 16da at the followers 23 and 24 on both sides.

  As shown in FIGS. 15 and 16, the shutter mechanism 27 includes a shutter piece 27a, a support shaft 27b, a guide pin 27c, and a torsion coil spring 27d. The shutter piece 27a is formed in a circular arc piece shape, is in contact with the contact surface of the driven body 22 of the driven bodies 23 and 24 with the end surface of the casing 22b, and is rotatably supported by the support shaft 27b. A clutch groove 26d is opened and closed. A curved inclined portion 27aa is provided on an arc-shaped outer peripheral portion that partially overlaps the clutch groove 26d of the one-way clutch 26, and a guide that receives a guide pin 27c near the tip of the rotation is provided. A groove 27ab is provided. The support shaft 27b is fixed to the contact surface of the driven body 23, 24 of the driving body 22 with the end surface of the casing 22b, and is disposed near the inclined portion 26db of the clutch groove 26d of the one-way clutch 26, and rotates the shutter piece 27a. Is supported so as to be able to overlap a part of the flat portion 26da of the clutch groove 26d of the one-way clutch 26. The guide pin 27c is fixed to the contact surface of the driven body 22 of the driven bodies 23 and 24 with the end surface of the casing 22b and is disposed near the flat portion 26da of the clutch groove 26d of the one-way clutch 26, and the rotation of the shutter piece 27a. To guide you. The torsion coil spring 27d is mounted coaxially to the support shaft 27b and is locked to the shutter piece 27a and the followers 23 and 24, and urges the shutter piece 27a to close the clutch groove 26d of the one-way clutch 26. is doing.

  Further, in this drive transmission mechanism U, as shown in FIGS. 7 and 8, output shafts 35 and 36, output sprockets are connected to driven gears 31 and 32 fixed to driven bodies 23 and 24 via relay gears 33 and 34, respectively. 37 and 38 are meshingly connected. The output sprockets 37 and 38 are exposed from the housing 21. Further, a relay gear 39 such as a bevel gear is meshedly connected to the drive gear 22 a of the drive body 22 from the drive motor as the drive unit 9. A drive transmission chain 40 is hung between one output sprocket 37 and the drive transmission sprocket 19 that drives the moving chain 8. A drive transmission chain 41 is hung between the other output sprocket 38 and the drive transmission sprocket 12 that drives the winding roller 6. Therefore, lubricating oil for smoothly operating the drive transmission mechanism U having a mechanical configuration is enclosed in the housing 21, and the output sprockets 37 and 38 connected to the moving chain 8 and the winding roller 6 are opposed to each other from the housing 21. Since it is exposed, the connection of the lubrication system and the arrangement of the connecting relay member become unnecessary, and a degree of freedom can be obtained at the mounting position on the vehicle.

  According to this drive transmission mechanism U, the one-way clutch 26 is provided between the driving body 22 and the driven bodies 23 and 24, the cam 25 is provided inside the driving body 22, and the one-way clutch 26 and the cam 25 are connected to the driving body 22, Since the driven bodies 23 and 24 are not exposed, the whole is made compact. Further, since the one-way clutch 26 has an engagement structure of the clutch pin 26b and the clutch groove 26d, and the clutch pin 25b is operated by the slide of the slider 26a regulated by the cam 25, the structure is simplified and the manufacturing is inexpensive and easy. Become.

  In this drive transmission mechanism U, as shown in FIG. 9A, when the drive unit 9 is rotationally driven in one direction (forward direction), the drive body 22 (drive gear 22a) is forwarded via the relay gear 39. Rotated in the direction. At this time, when the guide 26af of the slider 26a of the one-way clutch 26 is in the main groove 25ca on the right side of the drawing of the guide groove 25c of the cam 25, the step portion 25cac is formed from the shallow portion 25cab of the groove bottom to the deep portion 25caa of the groove bottom. Move down the main groove 25ca on the right side of the drawing as it is (see FIGS. 10A and 11A), and if the guide groove 25c of the cam 25 is in the main groove 25ca on the left side of the drawing, the deep part of the groove bottom It is regulated by the step 25cac from 25caa before the shallow portion 25cab at the bottom of the groove, is changed in direction to the connecting groove 25cb, and is displaced and moved to the main groove 25ca on the right side of the drawing (FIG. 10B, FIG. 11B). reference). As for the movement of the guide 26af of the slider 26a of the one-way clutch 26, smoothness is ensured by the coil spring 26ag, and accuracy is ensured by being guided by the guide groove 25c of the cam 25 arranged as a fixed shaft. Yes.

  As a result, the ring board 26aa supporting the guide 26af of the slider 26a of the one-way clutch 26 is slid to the right side of the drawing. The sliding of the ring board 26aa of the slider 26a of the one-way clutch 26 compresses the elastic member 26c on the right side of the drawing and slides the clutch pin 26b to the right side of the drawing. The clutch pin 26b slid by the one-way clutch 26 is engaged with a clutch groove 26d provided on the driven body 23 on the right side of the drawing. As for the engagement of the clutch pin 26b and the clutch groove 26d of the one-way clutch 26, the sliding of the clutch pin 26b is caused by the elastic force of the elastic member 26c having an impact absorbing function, and the pin body 26ba of the clutch pin 26b is the inclined portion of the clutch groove 26d. Smooth and non-impact properties are ensured by slowly intruding from 26db into the flat portion 26da. As shown in FIG. 16, the pin body 26ba of the clutch pin 26b that has entered the flat portion 26da of the clutch groove 26d of the one-way clutch 26 comes into contact with the inclined portion 27aa of the shutter piece 27a of the shutter mechanism 27, and the clutch groove The shutter piece 27a of the shutter mechanism 27 that closes 26d is automatically opened. As for the contact of the clutch body 26ba of the clutch pin 26b of the one-way clutch 26 with the inclined portion 27aa of the shutter piece 27a of the shutter mechanism 27, the shock is mitigated by the inclined portion 27aa having a slidable curved shape. 27 is ensured, the timing of opening the clutch groove 26d of the one-way clutch 26 by the shutter mechanism 27 is accurate, and the collision between the clutch pin 26b of the one-way clutch 26 and the shutter piece 27a of the shutter mechanism 27 is prevented. The

  The engagement of the clutch pin 26b and the clutch groove 26d of the one-way clutch 26 brings about a rotation following the rotation of the driving body 22 in the positive direction of the driven body 23 on the right side of the drawing. Then, a rotational output in the positive direction of the output sprocket 37 on the right side of the drawing is generated via the driven gear 31, the relay gear 33, and the output shaft 35. That is, the drive transmission sprocket 38 that drives the movement chain 8 is driven via the drive transmission chain 40.

  When the drive body 22 and the driven body 23 are rotated in the forward direction, the engagement between the clutch pin 26b of the one-way clutch 26 and the clutch groove 26d provided in the driven body 24 on the left side of the drawing is released. The driven body 24 on the left side of the drawing is free to rotate and is not rotated. Since the shutter piece 27a of the shutter mechanism 27 closes the clutch groove 26d of the one-way clutch 26 provided on the driven body 24 on the left side of the drawing, the clutch pin 26b does not accidentally enter the clutch groove 26d. .

  Further, as shown in FIG. 9B, when the drive unit 9 is rotationally driven in the other direction (reverse direction), the drive body 22 (drive gear 22a) is rotated in the reverse direction via the relay gear 39. . At this time, when the guide 26af of the slider 26a of the one-way clutch 26 is in the main groove 25ca on the right side of the drawing of the guide groove 25c of the cam 25, the step portion is formed from the deep portion 25caa of the groove bottom to the shallow portion 25cab of the groove bottom. 25cac, the direction of the connecting groove 25cb is changed, and the displacement is moved to the main groove 4ca on the left side of the drawing (see FIGS. 10B and 12A). When in the main groove 25ca, the step portion 25cac is lowered from the shallow portion 25cab of the groove bottom to the deep portion 25caa of the groove bottom, and is moved as it is in the main groove 25ca on the left side of the drawing (FIGS. 10A and 12B). reference).

  As a result, the ring board 26aa supporting the guide 26af of the slider 26a of the one-way clutch 26 is slid to the left side of the drawing. The sliding of the ring plate 26aa of the slider 26a of the one-way clutch 26 compresses the elastic member 26c on the left side of the drawing and slides the clutch pin 26b to the left side of the drawing. The clutch pin 26b slid by the one-way clutch 26 is engaged with a clutch groove 26d provided in the driven body 24 on the left side of the drawing.

  The engagement of the clutch pin 26b and the clutch groove 26d of the one-way clutch 26 brings about a rotation following the rotation of the driving body 1 in the reverse direction of the driven body 24 on the left side of the drawing. Then, a rotational output in the reverse direction of the output sprocket 39 on the right side of the drawing is generated via the driven gear 32, the relay gear 34, and the output shaft 36. That is, the drive transmission sprocket 12 that drives the winding roller 6 is driven through the drive transmission chain 41.

  When the driving body 1 and the driven body 3 are rotated in the reverse direction, the engagement between the clutch pin 5b of the one-way clutch 5 and the clutch groove 5d provided in the driven body 2 on the right side of the drawing is released. The driven body 2 on the right side of the drawing is free to rotate and is not driven to rotate. Since the shutter piece 6a of the shutter mechanism 6 closes the clutch groove 5d of the one-way clutch 5 provided on the driven body 2 on the right side of the drawing, the clutch pin 5b does not accidentally enter the clutch groove 5d. .

  According to this drive transmission mechanism U, the switching of the transmission path of the driving force is automatically executed in response to the switching of the rotation direction on the drive side without providing an operation unit.

  According to this cargo handling apparatus, the conveyor 5 does not have a two-stage arrangement structure, so the winding roller 6, the drive unit 9 that is the drive mechanism, and the drive transmission mechanism U are installed using the recesses on the floor surface Ba of the loading platform B. By doing so, the arrangement | positioning surface used as the loading surface of the conveyor 5 in which a cargo is loaded can be made low. Therefore, it is possible to effectively use the volume of the loading platform B for loading cargo and to secure a large loading capacity. Further, since the installation space is reduced by avoiding the two-stage arrangement structure of the conveyor 5, the fixed loading platform B of the truck T that has already been used can be easily retrofitted. Note that the fact that the drive unit 9 is composed of one unit also contributes to a reduction in the mounting space. Further, the drive transmission mechanism U attached to the drive unit 9 is provided with a one-way clutch 26 and a cam 25 between the drive body 22 and the driven bodies 23 and 24 to provide compactness. Useful for installation using recesses. Further, the interval between the endless reciprocating lines of the moving chain 8 being reduced by the auxiliary sprocket 34 also contributes to lowering the arrangement surface that becomes the loading surface of the conveyor 19 on which the cargo is loaded.

  In order to use this cargo handling device, the conveyor 5 is fed from the winding roller 6 by driving the moving chain 8 by the drive unit 9, whereby the cargo loaded and loaded on the rear side of the loading platform B is loaded with the cargo support 7. At the same time, it is moved to the front side of the loading platform B. At this time, the winding roller 6 is in a free-rotatable state and does not interfere with the feeding of the conveyor 5. Further, the cargo loaded on the front side of the loading platform B is moved to the rear side of the loading platform B at the time of unloading by winding the conveyor 5 on the winding roller 6 by driving in the reverse direction by the driving unit 9. become. At this time, the moving chain 8 is in a freely rotatable state, and there is no problem in winding the conveyor 19.

  In this use, as is clear from the description of the drive transmission mechanism U described above, the feeding and winding of the conveyor 19 are automatically changed by switching the rotation direction of the drive unit 9.

  According to the first example, when the cargo is moved back and forth by the cargo handling device, the moving feed shaft drive mechanism 10 is rotationally driven in the forward and reverse directions by the forward and reverse rotation of the rotary shaft 17 on the front side. As a result, the movable feed shaft 2 is driven to rotate forward and backward, and the rope attachment body 3 is engaged with the movable feed shaft 2 by the connecting mechanism 3d, so that the cargo is tilted and collapsed. The rope attachment body 3, which is the attachment point of the rope R on the loading platform B to be prevented, is moved back and forth in synchronization with the movement of the cargo (see FIGS. 2 and 3). Accordingly, the cargo is fixed by the rope R.

  In the movement of the rope attachment body 3, the roller 3dc of the coupling mechanism 3d rolls on the bottom surface 2bb without contacting the bottom surface 2ba of the spiral groove 2b of the moving feed shaft 2, so that friction is reduced and smooth movement is achieved. The Further, since a pair of coupling mechanisms 3d are provided on the rope attachment body 3 and the engagement with the spiral groove 2b of the movement feed shaft 2 is less likely to be biased, the rope attachment body 3 along the movement feed shaft 2 is not affected. Movement in a stable posture is ensured.

  The connecting mechanism 3d of the rope attachment body 3 slides the slide pin 3db into the spiral groove 2b of the moving feed shaft 2 by grasping the operation portion 3de and moving it up and down along the operation guide groove 3df. It can be engaged and disengaged. Therefore, since the structure of the connecting mechanism 3d is simple, the rope attachment body 3 can be manufactured at low cost.

  When the rope attachment body 3 is detached from the moving feed shaft 2, as shown in FIG. 1, the rope attachment body 3 becomes free and along the moving feed shaft 2 regardless of the rotation of the moving feed shaft 2. It becomes movable. The rope attachment body 3 can be engaged with the moving feed shaft 2 at an arbitrary position. As a result, the attachment point of the rope R on the loading platform B can be easily changed according to the size, shape, etc. of the cargo. In particular, since the operation portion 3de of the coupling mechanism 3d is exposed from the rope attachment body 3, an operation for changing the attachment point of the rope R in a limited gap or the like of cargo loaded on the loading platform B becomes easy.

  The state in which the rope attachment body 3 is detached from the moving feed shaft 2 is held by the coil spring 3dd and the lock groove 3dg. Therefore, even if the rope attachment body 3 in a free state is moved along the moving feed shaft 2, the roller 3dc of the coupling mechanism 3d is not accidentally collided with the moving feed shaft 2.

  FIG. 18 shows a second example of an embodiment for carrying out the cargo fixing device according to the present invention.

  In the second example, the operation portion 3de of the coupling mechanism 3d of the rope attachment body 3 is rotatably supported on the base portion 3a by the shaft 3dh, and the circular cam 3di fixed to the operation portion 3de rotates to slide the slide pin 3db. It is configured to slide.

  According to the second example, smoother operation can be obtained than when the operation portion 3de is operated along the narrow operation guide groove 3df of the first example.

  As described above, in addition to the illustrated examples, the cargo support 7 can be fed and driven by the rotation of the moving feed shaft 2.

  Furthermore, the floor surface Ba of the loading platform is fixed, and it is also possible to link with a cargo handling device that slides and moves a light cargo by moving the cargo support 7.

1
Rail 2 Moving feed shaft 2a Round bar 2b Spiral groove 3 Rope attachment body 3d Connection mechanism 3db Slide pin 3dc Roller 3dd Coil spring (spring)
3de operation part B loading platform Bc side panel R rope T truck (vehicle)

Claims (5)

  The attachment point of the rope loading platform that moves over the cargo in conjunction with the drive for moving the loading platform in the longitudinal direction of the cargo loaded on the loading platform is moved in the longitudinal direction of the loading platform. A cargo fixing device includes a rope attachment body to which a rope is attached and a moving feed shaft that drives movement of the rope attachment body in the front-rear direction. The rope attachment body engages and disengages from the movement feed shaft. A cargo fixing device, comprising: a connecting mechanism that enables the rope attachment body to move freely along the moving feed shaft by detachment from the moving feed shaft.   2. The cargo fixing device according to claim 1, wherein the moving feed shaft is provided with a spiral groove formed in a round bar, and the coupling mechanism includes a slide pin that is advanced and retracted with respect to the spiral groove of the moving feed shaft. Cargo fixing device characterized by.   3. The cargo fixing apparatus according to claim 2, wherein the coupling mechanism includes a spring that elastically presses the slide pin in a direction in which the slide pin moves backward with respect to the spiral groove of the moving feed shaft.   4. The cargo fixing apparatus according to claim 2, wherein the coupling mechanism includes a roller that is rotatably attached to the tip end portion of the slide pin and rolls within the spiral groove of the moving feed shaft. .   The cargo fixing device according to any one of claims 2 to 4, wherein the coupling mechanism includes an operation portion that is exposed from the rope attachment body and the slide pin is operated.