JP5877531B1 - Truck carrier and truck carrier safety equipment - Google Patents

Abstract

[PROBLEMS] To provide a platform for a truck that can use a horizontally expanded upper tilt plate as a work platform, and is excellent in safety when carrying out loading work. Provided is a technology in which a support is not obstructed and the loss of a support for a master rope can be suppressed. SOLUTION: A two-stage tilt having a lower tilt plate and an upper tilt plate, a posture changing means for holding the posture of the upper tilt plate so that the posture can be switched between a standing posture and a horizontal posture, and a parent rope holder on the tip side. A main strut strut formed, and a rotation mechanism for pivotally attaching the base end side of the main strut strut to the upper tilt plate. A sideways posture in which the main rope support column is disposed along the upper end surface of the upper side, and a standing posture in which the parent rope column column is rotated from the sideways posture in an out-of-plane direction with respect to the upper side tilt plate and is raised with respect to the upper level plate. To be switchable. [Selection] Figure 6

Description

  The present invention relates to a truck bed and a truck bed safety device.

  When loading / unloading a load (load) or hanging a rope on a truck bed, if the load is approaching the side wall (climbing plate) of the bed, the stepping position becomes narrower. And safety may deteriorate.

  In this regard, Patent Document 1 discloses a technique in which an upper part of a two-stage tilt (swing) in a loading platform of a transport vehicle is deployed in a horizontal posture and used as a working scaffold. As described above, when the upper stage portion of the two-stage tilt is developed in a horizontal posture and used as a work scaffold, there is a possibility that the load work becomes a work at a high place.

  Therefore, a technique for installing a master rope support for linking the master rope when working at a high place on a truck bed is known. As a conventional parent rope support column, a type fixed to the corner of the cargo bed and a type standing detachably at the corner of the cargo bed are known. In Patent Document 2, two or more long members that are detachably mounted on the loading platform, and a master rope that is connected to one end of the two long members and is connected between the long members. And a safety device for loading platform work comprising one end slidable with respect to the master rope and a rope member provided with a connector connected to an operator on the other end side is disclosed.

JP 2000-219077 A JP2012-81103A

  However, when loading the upper tilt plate horizontally opened as a work scaffold, if the conventional strut support strut is used, the master straddle will be connected to the inside of the work scaffold. From the viewpoint of further improving the safety of work, it is advantageous to link the master rope outside the work scaffold. However, if the main rope support post is fixed perpendicularly to the upper tilt plate, the main rope support will erode into the loading area when the upper tilt plate is erected vertically with respect to the loading surface of the loading platform. And get in the way. On the other hand, if the main rope support column can be attached to and detached from the upper tilt plate, and if the upper tilt plate is deployed horizontally, the parent rope support will be in the way if it is erected on the upper tilt plate. However, on the other hand, inconveniences such as losing the removed master rope support tend to occur.

  The present invention has been made in view of the above-described problems, and the object thereof is excellent in safety when carrying out loading work in a truck bed that can be used as a working scaffold using a horizontally expanded upper tilt plate. In addition, it is an object of the present invention to provide a technique capable of suppressing the loss of the master rope support column without the obstacle of the master rope support when the upper stage tilt plate is not used as a work scaffold.

In order to achieve the above object, the present invention is a two-stage tilt in a truck bed, and a main strut column is rotatably attached to an upper tilt plate via a rotation mechanism. A sideways posture in which the main rope support column is arranged along the upper end surface of the upper side tilt plate, and the parent rope support column is rotated from the sideways posture to the outboard side of the upper side tilt plate and is raised from the upper level tilt plate. Switchable to standing posture.

  More specifically, the truck bed according to the present invention includes a two-stage tilt having a lower tilt plate and an upper tilt plate pivotally attached to the lower tilt plate via a hinge, and the posture of the upper tilt plate is defined as follows. A posture changing means for holding the standing rope so as to be switchable between a standing posture standing upright with respect to the loading surface and a horizontal posture extended outward from the standing posture to become horizontal, and a parent rope for linking the parent rope And a pivot mechanism for pivotally attaching the master rope strut to the upper tilt plate, wherein the pivot mechanism attaches the master rope prop to the upper end surface of the upper tilt plate. A sideways posture in which the master rope support column is disposed along the vertical lying position, and the parent rope support column is rotated from the sideways posture in an out-of-plane direction with respect to the upper tilt plate, and is standing upright with respect to the upper tilt plate To be able to switch to posture And butterflies.

  The truck loading platform safety device according to the present invention includes a two-stage tilting device having a lower tilting plate and an upper tilting plate pivotally attached to the lower tilting plate via a hinge, and the posture of the upper tilting plate. , Applied to a truck bed provided with a change-over means capable of being switched between a standing posture standing upright with respect to the loading surface of the loading platform and a horizontal posture deployed outward from the standing posture until becoming horizontal A master strut for linking the master rope, and a pivot mechanism for rotatably attaching the master rope strut to the upper tilt plate. A horizontal support posture in which the main support strut is disposed along the upper end surface of the upper tilt plate, and the main support post is rotated in the out-of-plane direction of the upper tilt plate from the horizontal position. And raised against the upper tilt plate Characterized by holding and switching to the standing posture.

  According to the present invention, since the main rope support column is rotatably attached to the upper end surface of the upper tilt plate, when the horizontally expanded upper tilt plate is used as a working scaffold, the upper tilt plate A master rope can be linked to the outside. As a result, the master rope can be linked to the outside of the worker walking on the upper tilt plate used as a work scaffold, so that the safety during loading work can be improved. On the other hand, when the upper-stage tilt plate is not used as a work scaffold, the upper-stage tilt plate can be placed along the upper-stage tilt plate by placing the master rope support on its side. For this reason, it can suppress that the support | strut for master rope does not penetrate | invade largely into the loading surface of a loading platform, and becomes obstructive. Moreover, since it is possible to switch between the lying down posture and the standing posture without attaching or removing the master rope support column, there is no possibility of losing the master rope support column.

  In the present invention, the rotating mechanism includes a cylindrical sleeve member embedded and fixed in the height direction of the upper tilt plate from the upper end surface, and an inner peripheral surface of the sleeve member. A rod-shaped or cylindrical coupling member that is slidably inserted and coupled to the parent rope support column, and a sliding range that regulates a sliding range of the coupling member with respect to the sleeve member within a predetermined range And a locking means for locking the connecting member to the sleeve member when a relative sliding angle of the connecting member with respect to the sleeve member becomes an angle corresponding to the standing posture of the parent rope support post. May be included. By comprising in this way, the support | stretch for master rope can be stably hold | maintained to a standing posture suitably.

  In the present invention, the sliding range restricting means is provided in one member of the sleeve member and the connecting member and extends along the circumferential direction, and the other of the sleeve member and the connecting member. And a protrusion provided on the member and inserted into the elongated hole. According to the said structure, the sliding range of the connection member with respect to a sleeve member can be controlled in a predetermined range with a simple mechanism.

In the present invention, the locking means is formed on the inner peripheral side of the sleeve member, and is formed in communication with the elastic member for urging the connecting member in the axial direction and the elongated hole. When the relative sliding angle of the connecting member with respect to the angle becomes the angle corresponding to the standing posture of the strut for the main rope, the fitting for the standing posture for fitting the protrusion using the biasing force of the elastic member And a joint hole may be included. By configuring in this way, when the relative sliding angle of the connecting member becomes an angle corresponding to the standing posture of the parent rope support column, the protruding force is projected into the fitting horizontal hole for the standing posture using the biasing force of the elastic member. And the connecting member can be locked to the sleeve member. Therefore, the master rope support column can be stably held in the standing posture with a simple mechanism.

  In the present invention, the locking means is formed in communication with the elongated hole, and a relative sliding angle of the connecting member with respect to the sleeve member is an angle corresponding to the sideways posture of the main rope support column. A laterally mounted fitting lateral hole for engaging the projection using the urging force of the elastic member, and the relative sliding angle of the connecting member is The connection member may be configured to be locked to the sleeve member even when an angle corresponding to the posture is reached. By configuring in this way, when the relative sliding angle of the connecting member reaches an angle corresponding to the sideways posture of the parent rope support column, the sideways posture fitting side hole using the biasing force of the elastic member The projection can be fitted to the sleeve member, and the connecting member can be locked to the sleeve member. As a result, for example, when the master rope support column is not used, it is possible to suppress the posture of the master rope support rod from fluttering due to vibrations, crosswinds, and the like when the truck travels with a simple mechanism.

  Further, in the present invention, the fitting horizontal hole for standing posture is provided at one end in the long axis direction of the elongated hole, and the fitting horizontal hole for sideways posture is provided at the other end in the long axis direction of the long hole. May be. With this configuration, the protrusion that abuts one end of the elongated hole by using the urging force of the elastic member when the relative sliding angle of the connecting member becomes an angle corresponding to the standing posture of the main rope support column is used. Can be smoothly fitted into the fitting lateral hole for the standing posture. In addition, since the relative sliding angle of the connecting member becomes an angle corresponding to the sideways posture of the main strut support column, the protrusion that is in contact with the other end of the elongated hole can be smoothly laid using the urging force of the elastic member. It can be fitted in the fitting lateral hole for the inverted posture.

  The means for solving the problems in the present invention can be combined as much as possible.

  According to the present invention, in a truck bed that can be used as a working scaffold, the horizontally deployed upper stage plate is excellent in safety when performing loading work, and when the upper stage plate is not used as a work platform. It is possible to provide a technique capable of suppressing the loss of the strut for the main rope without disturbing the strut for the main rope.

FIG. 1 is a side view of a track according to the embodiment. FIG. 2 is a top view of the track according to the embodiment. FIG. 3 is a rear view of the track according to the embodiment. FIG. 4 is a diagram illustrating a state in which the upper tilt plate of the side tilt according to the embodiment is closed. FIG. 5 is a view showing a state in which the upper tilt plate of the side tilt according to the embodiment is horizontally tilted. FIG. 6 is a diagram illustrating the operation content of the master rope support according to the embodiment. (A) shows a sideways posture, (b) shows a standing posture. FIG. 7 is an exploded view showing a rotation mechanism according to the embodiment. FIG. 8 is a partially enlarged view showing a state in which the rotation mechanism according to the embodiment is assembled. FIG. 9 is a view for explaining a method of attaching the master rope support post to the upper stage tilt plate of the loading platform via the rotation mechanism according to the embodiment. (A) shows the state before attaching the strut for master rope, and (b) shows the state after attaching the strut for master rope. FIG. 10 is a diagram illustrating a correspondence relationship between the relative sliding angle of the connecting member with respect to the sleeve member according to the embodiment and the posture of the support for the master rope. (A) shows the state in which the strut for the master rope is in a sideways posture and the connecting member is locked to the sleeve member. (B) shows the state in which the master rope support is in the sideways posture and the lock of the connecting member with respect to the sleeve member is released. (C) shows the state in which the support for the master rope is in the standing posture and the lock of the connecting member with respect to the sleeve member is released. (D) shows a state in which the strut for the master rope is in a standing posture and the connecting member is locked to the sleeve member. FIG. 11 is a diagram illustrating a state in which the master rope is connected to the master rope support of the loading platform according to the embodiment. FIG. 12 is a diagram illustrating a situation in which loading work is performed using the upper tilt plate according to the embodiment as a work scaffold.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments for carrying out the invention will be exemplarily described in detail with reference to the drawings.

<Embodiment>
FIG. 1 is a side view of a track 1 according to the embodiment. FIG. 2 is a top view of the track 1 according to the embodiment. FIG. 3 is a rear view of the track 1 according to the embodiment. The truck 1 is a flat body load carrying vehicle with a crane. The truck 1 includes a cab 2 including a cab, a loading platform 3 located behind the cab 2, a crane 4, and the like. The cab 2 and the loading platform 3 are mounted on a chassis (chassis).

  The loading platform 3 has a box shape as a whole, and a torii gate 32 is provided at the front end thereof. Further, a tilt is provided at the side and rear end of the loading platform 3 so as to be freely opened and closed. 1 to 3, the tilt of the loading platform 3 is closed.

  The loading platform 3 has a substantially square-shaped loading platform frame 5 in plan view, and the loading platform frame 5 defines the outer shape of the loading platform 3. The loading platform frame 5 is fixed to the chassis frame of the truck 1 via vertical joists and horizontal joists. Although the chassis frame, the vertical joists and the horizontal joists themselves are well-known structures, illustration thereof is omitted. However, the chassis frame as a whole has a ladder-type frame structure in plan view. The vertical joists are fastened on the chassis frame of the truck 1 by a binding tool such as a U bolt. Further, the horizontal joists are spanned on the vertical joists at a predetermined interval, and are fastened to the vertical joists via bolts.

  The loading frame 5 of the loading platform 3 is fixed to the horizontal joists by bolts, for example. In the loading frame 5, a member extending along the vehicle front-rear direction is referred to as a vertical frame portion 5 a, and a member extending along the vehicle width direction is referred to as a horizontal frame portion 5 b. The loading frame 5 is composed of a pair of vertical frame portions 5a and a pair of horizontal frame portions 5b. A plurality of floor plates 31 constituting a loading surface of the cargo are fixed to the lateral joists of the loading platform 3.

  Furthermore, the torii gate 32 is fixed to the horizontal frame part 5b arranged on the vehicle front side of the pair of horizontal frame parts 5b in the loading frame 5. Further, an intermediate column 33 and a rear end column 34 erected vertically from the vertical frame portion 5a are erected on the intermediate portion and the rear end portion of the pair of vertical frame portions 5a in the loading frame 5. Furthermore, a pair of side tilts 6 are provided on both side edges of the loading platform 3 along the front-rear direction of the vehicle. The left and right lateral tilts 6 are disposed between the intermediate column 33 and the rear end column 34, and are connected to the vertical frame portion 5 a in the loading frame 5 via the hinge 10. On the other hand, a rear tilt 7 is provided at the rear edge of the loading platform 3 along the vehicle width direction. The rear tilt 7 is disposed between the pair of rear end columns 34, and is connected to the rear lateral frame portion 5 b in the loading frame 5 via the hinge 10.

  In this embodiment, the side tilt 6 and the rear tilt 7 of the loading platform 3 are configured as a two-stage tilt divided into two stages in the height direction. Specifically, the pair of side tilts 6 and rear tilts 7 are a lower tilt plate 11 and an upper tilt plate 13 that is pivotally connected to the lower tilt plate 11 via an intermediate hinge 12, that is, is pivotably connected. have. For example, in the present embodiment, the height of the lower tilt plate 11 is designed to be larger than that of the upper tilt plate 13, and in the example shown in FIG. 1, the upper tilt plate 13 is about 400 mm and the lower tilt plate 11 is 800 mm. It is about the size.

  The lateral tilts 6 stand on the pair of vertical frame portions 5a of the loading platform frame 5 so as to stand upright with respect to the floor plate 31 of the loading platform 3 and then expand (rotate) outward from the state with the hinge 10 as a fulcrum. Thus, it can be displaced to a state where it hangs down outside the loading platform 3. Further, as described above, the lower tilt plate 11 and the upper tilt plate 13 are rotatable with respect to the side tilt 6 via the intermediate hinge 12 as described above. For this reason, the lateral tilt 6 has a posture in which the upper tilt plate 13 extends on the extension line of the lower tilt plate 11 and, from this state, the upper tilt plate 13 is expanded (rotated) outwardly with the intermediate hinge 12 as a fulcrum. It is possible to displace to the posture folded back to the outside of the lower tilt plate 11. The lower tilt plate 11 in the side tilt 6 and the vertical frame portion 5a of the loading frame 5 are pivotally attached by a plurality of hinges 10, and are rotatable with respect to each other. Further, the upper tilt plate 13 and the lower tilt plate 11 in the side tilt 6 are pivotally attached by a plurality of intermediate hinges 12 and are rotatable with respect to each other.

  Moreover, the upper stage tilt plate 13 and the lower stage tilt plate 11 are each provided with a latch 14 at the front end and the rear end. The latch 14 is engageable with the lower stopper 15 installed on the intermediate column 33 and the rear end column 34, respectively. By locking the latch 14 of the lower tilt plate 11 by the lower stopper 15, the lower tilt plate 11 can be held in an upright state. Similarly, the upper stage plate 13 can be held in an upright state by engaging the latch 14 of the upper stage plate 13 with the upper stopper 16.

  On the other hand, the rear tilt 7 extends (rotates) outward from the state of standing vertically to the floor plate 31 of the loading platform 3 on the horizontal frame portion 5b of the loading platform frame 5 and the hinge 10 as a fulcrum from that state. In addition, it can be displaced to a state where it hangs down outside the cargo bed 3. Further, as described above, the lower tilt plate 11 and the upper tilt plate 13 are rotatable with respect to the rear tilt 7 via the intermediate hinge 12 as described above. For this reason, the rear tilt 7 has a posture in which the upper tilt plate 13 extends on the extension line of the lower tilt plate 11, and from this state, the upper tilt plate 13 is expanded (rotated) outwardly with the intermediate hinge 12 as a fulcrum. It is possible to displace to the posture folded back to the outside of the tilt plate 11. The lower tilt plate 11 in the rear tilt 7 and the horizontal frame portion 5b of the loading frame 5 are pivotally attached by a plurality of hinges 10, and are rotatable with respect to each other. In addition, the upper step plate 13 and the lower step plate 11 in the rear step 7 are pivotally attached by a plurality of intermediate hinges 12 and are rotatable with respect to each other.

  Also in the rear tilt 7, latches 14 are provided at both ends of the upper tilt plate 13 and the lower tilt plate 11, and these latches 14 engage with the lower stopper 15 and the upper stopper 16 provided on the rear end column 34, respectively. Is possible. By locking the latch 14 of the lower tilt plate 11 in the rear tilt 7 by the lower stopper 15, the lower tilt plate 11 can be held in an upright state. Similarly, the upper stage plate 13 can be held in an upright state by engaging the latch 14 of the upper stage plate 13 with the upper stopper 16.

FIG. 4 is a diagram illustrating a state in which the upper tilt plate 13 of the side tilt 6 according to the embodiment is closed. An entrance door 35 is provided at the front portion of the loading platform 3. The entrance door 35 is a door for an operator to enter and exit the loading platform 3, and a pair of entrance doors 35 are installed on both side surfaces of the loading platform 3. In the truck 1 of the present embodiment, the door 35 is disposed at a portion sandwiched between the torii 32 and the intermediate pillar 33 in each vertical frame portion 5a of the loading frame 5. The entrance / exit door 35 is rotatably connected to the torii 32 via a hinge 36 at one side end located on the torii 32 side. Further, a latch 37 is provided at the other end of the entrance door 35, and this latch 37 can be engaged with a stopper 38 provided on the intermediate pillar 33. Further, a handle 39 for operating the latch bolt is provided on the outer surface 35a of the door 35. In the entrance door 35 in this embodiment, the handle 39 is provided only on the outer surface 35a side, but may be provided on both surfaces. When the handle 39 is operated, the latch bolt of the door 35 is activated in accordance with the operation, and the latch bolt can be engaged with and disengaged from the locking hole provided on the side surface of the intermediate pillar 33.

  As shown in FIG. 1 and FIG. 3, the lower tilt plate 11 in each of the side tilt 6 and the rear tilt 7 is provided with a tilt support 9 for supporting the upper tilt plate 13 pivotally attached thereto. ing. The tilt support 9 is installed at a plurality of locations along the longitudinal direction of the lower tilt plate 11 in the side tilt 6 and the rear tilt 7. In the example shown in FIG. 1, a total of three tilt supports 9 are provided near the front end portion, the middle portion, and the rear end portion of the lower tilt plate 11 in the side tilt 6. On the other hand, in the example shown in FIG. 3, two tilt supports 9 are provided in the vicinity of both ends of the lower tilt plate 11 in the rear tilt 7.

  Next, details of the tilt support 9 will be described. As shown in FIG. 4, the tilt support 9 has a shaft portion 91 that is pivotally supported by the lower tilt plate 11 of the side tilt 6 (the rear tilt 7), and a plate shape that extends in a substantially orthogonal direction from the upper end side of the shaft portion 91. The supporting portion 92, the shaft portion 91, and the reinforcing member 93 that connects the supporting portion 92 at an angle. As shown in the figure, the shaft portion 91 of the tilt support 9 is pivotally supported by a bearing portion 94 installed on the outer surface of the lower tilt plate 11 of the side tilt 6 (rear tilt 7). It is arranged along the outer surface. The tilt support 9 has a shaft portion 91 that is rotatable in a vertical posture in a state in which the lower tilt plate 11 of the side tilt 6 (rear tilt 7) stands upright.

  The support portion 92 of the tilt support 9 has a horizontal support surface 92a that is held in a horizontal posture when the lower tilt plate 11 is in a vertically upright state. FIG. 4 shows the tilt support 9 in a state where the horizontal support surface 92a is attached to the outer surface of the lower tilt plate 11 and stored. As shown in FIG. 4, a displacement preventing member 17 having a substantially U shape is attached to the outer surface of the upper tilt plate 13. The displacement preventing member 17 has a pair of opposed displacement preventing surfaces 17 a orthogonal to the outer surface of the upper tilt plate 13, and the dimension between the pair of displacement preventing surfaces 17 a is determined by the support portion 92 ( It is equal to or slightly larger than the width dimension of the horizontal support surface 92a).

  FIG. 5 is a diagram illustrating a state in which the upper tilt plate 13 of the side tilt 7 according to the embodiment is horizontally tilted. In this way, by placing the upper tilt plate 13 in a horizontal posture, the upper tilt plate 13 is used as a working scaffold when loading work such as raising and lowering a load (load) or rope hanging on the loading platform 3. be able to. When the upper-stage tilt plate 13 is used as a working scaffold, the tilt support 9 is rotated by approximately 90 ° from the storage state shown in FIG. 4 (the state where it is attached to the outer surface of the lower-stage tilt plate 11), and as shown in FIG. The tilting support 9 is raised until the support surface 92a is perpendicular to the outer surface of the lower tilt plate 11. Here, when the tilt support member 9 is raised from the stored state and the horizontal support surface 92a is orthogonal to the outer surface of the lower tilt plate 11, the slip prevention member 17 fixed to the upper tilt plate 13 is Is adjusted so that its position in the front-rear direction coincides with the horizontal support surface 92a.

Therefore, after raising the tilt support 9 so as to be orthogonal to the outer surface of the lower tilt plate 11, the lock by the upper stopper 16 of the latch 14 provided at the end of the upper tilt plate 13 is released, and the tilt support 9 The upper tilt plate 13 is expanded (rotated) from the standing state to the outer side with the intermediate hinge 12 as a fulcrum until the outer surface of the upper tilt plate 13 contacts the horizontal support surface 92a. At that time, the latch 14 provided at the end of the lower-stage tilt plate 11 is not released, but is kept in a locked state, so that the lower-stage tilt plate 11 is maintained in the standing posture. As described above, since the position of the flat support surface 92a of the water tilt support 9 and the slip prevention member 17 of the upper tilt plate 13 in the longitudinal direction of the vehicle is the same, the upper tilt plate 13 is supported with the intermediate hinge 12 as a fulcrum. In the process of deploying outward from the standing state, the support portion 92 (horizontal support surface 92a) of the tilt support 9 is sandwiched between the pair of detent surfaces 17a of the detent member 17.

  Since the horizontal support surface 92a of the tilt support 9 is a horizontal plane when the lower tilt plate 11 stands vertically, the outer surface of the upper tilt plate 13 contacts the horizontal support surface 92a of the tilt support 9. At this point, the inner surface 13a of the upper tilt plate 13 is held as a horizontal plane. As a result, the inner surface 13a of the upper tilt plate 13 can be suitably used as a working scaffold. Further, in this state, since the support portion 92 of the tilt support 9 is engaged with the displacement preventing member 17, the tilt support 9 does not rotate carelessly. Therefore, when the inner surface 13a of the upper tilt plate 13 is used as a work scaffold, the work scaffold can be prevented from becoming unstable. 4 and 5, the situation has been described in which the upper tilt plate 13 of the lateral tilt 6 is horizontally deployed and used as a working scaffold, but the rear tilt 7 having the same structure as the lateral tilt 6 is also used. Similarly, it can be used as a working scaffold. As described above, in the present embodiment, for each of the side tilt 6 and the rear tilt 7, the posture of the upper tilt plate 13 is an upright posture that stands vertically with respect to the floor plate 31 that is the loading surface of the loading platform 3. Thus, the structure can be held so as to be switchable from the standing posture to the horizontal posture deployed outward until it becomes horizontal. In the present embodiment, the upper stopper 16 capable of holding the upper twisting plate 13 in the standing state and the tilt support 9 capable of holding the upper twisting plate 13 in the horizontal state correspond to the posture changing means according to the present invention.

  Next, the loading platform working safety device 40 provided in the loading platform 3 of the truck 1 will be described. The loading platform working safety device 40 is a device for safely loading work using the upper tilt plate 13 deployed in a horizontal posture as a working scaffold. In this embodiment, the master rope support 50 is rotatably attached to the upper tilt plate 13 via a rotation mechanism described later, and the master rope support 50 shown in FIG. Is held in a sideways posture that is tilted along the upper end surface 13b. Then, when the upper strung plate 13 is switched to a horizontal posture and used as a working scaffold, as shown in FIG. 5, the master rope support 50 can be switched to a standing posture. Further, an annular ring portion 51 is provided on the distal end side (upper end side) of the parent rope support 50 as a parent rope holder for holding the parent rope. In the present specification, the upper end surface 13b of the upper tilt plate 13 is a surface facing upward in a state where the upper tilt plate 13 is in a standing posture (closed state). Therefore, as shown in FIG. 5, the upper end surface 13 b of the upper step plate 13 faces the side of the loading platform 3 in a state where the upper step plate 13 is deployed in a horizontal posture.

  FIG. 6 is a diagram illustrating the operation content of the master rope support 50 according to the embodiment. FIG. 6A shows a state in which the master rope support 50 is held in a sideways posture, and corresponds to FIG. FIG. 6B shows a state in which the master rope support 50 is held in a standing posture, and corresponds to FIG. The loading platform work safety device 40 includes the parent rope support 50 described above and a rotation mechanism 60 that rotatably attaches the parent rope support 50 to the upper tilt plate 13. The master rope support 50 can be switched between a sideways posture shown in FIG. 6A and a standing posture shown in FIG. For example, when the upper landing plate 13 is held in a standing posture and is not used as a working scaffold, the master rope support 50 is held in the sideways posture shown in FIG. And when switching the upper stage board 13 to a horizontal posture and using it as a scaffold for work, the support | stretch 50 for main ropes is switched from a sideways posture to the standing posture shown in FIG.6 (b).

Next, the details of the rotation mechanism 60 for switching the posture of the master rope support 50 will be described. FIG. 7 is an exploded view for explaining the rotation mechanism 60 according to the embodiment. The rotating mechanism 60 includes a cylindrical sleeve member 61 that is fixed in a state where it is buried inside the upper tilt plate 13 along the height direction of the upper tilt plate 13 from the upper end surface 13 b of the upper tilt plate 13, A rod-shaped connecting member 62 that is slidably inserted along the peripheral surface and connected to the base end side of the main rope support column, and a sliding range of the connecting rod 62 with respect to the sleeve member 61 is within a predetermined range. It includes a sliding range regulating mechanism (sliding range regulating means) for regulating and a locking mechanism (locking means) for locking the connecting member 62 with respect to the sleeve member 61.

  The connecting member 62 is connected to the base end side (lower end side) of the parent rope support column 50, and as a specific example, a round bar (round steel) of about φ22 mm may be used. For example, in a state in which the connecting member 62 is inserted through a hole drilled in advance on the base end side of the main rope support 50, the connection member 62 is fixed integrally with the parent rope support 50 by welding or the like. To do. The connecting member 62 is connected to the master rope support 50 so that its axis is perpendicular to the axis of the master rope support 50.

  The sleeve member 61 is a bottomed cylindrical member into which the connecting member 62 can be inserted. For example, a metal sleeve having an inner diameter of about 28 mm may be used. On the inner peripheral side of the sleeve member 61, a spring 63 is inserted as an example of an elastic member that urges the connecting member 62 in the axial direction. Further, on the one end side of the sleeve member 61, the sleeve member 61 is embedded in the accommodation hole 13 c formed inside the upper-stage tilt plate 13 with the rotating mechanism 60 assembled, and then the upper end surface of the upper-stage tilt plate 13. A fixing portion 64 for fixing the sleeve member 61 to 13b is provided. The fixing portion 64 is provided at the open end (the end opposite to the closed end) in the longitudinal direction of the sleeve member 61. When the rotating mechanism 60 is assembled, the spring 63 is inserted into the proximal end side of the sleeve member 61, and then the connecting member 62 integrally connected to the parent rope support 50 from the distal end side of the sleeve member 61 is connected to the sleeve member 61. Insert inside.

  FIG. 8 is a partially enlarged view showing a state in which the rotation mechanism 60 according to the embodiment is assembled. As shown in FIG. 8, the sleeve member 61 is formed with a long hole 65 extending along the circumferential direction. Lateral holes 66 a and 66 b are provided in communication with the elongated hole 65 at the respective end portions 65 a and 65 b in the major axis direction of the elongated hole 65. On the other hand, the connecting member 62 is provided with a protrusion 67 that can be inserted (inserted) into the elongated hole 65 of the sleeve member 61, and the protrusion 67 of the connecting member 62 is the length of the sleeve member 61 in the process of assembling the rotating mechanism 60. It is inserted into the hole 65 (see FIG. 8). For example, a concave portion is formed in a portion of the connecting member 62 where the protrusion 67 is to be attached. And it is good to give a thread groove process to both the recessed part and projection 67 on the connection member 62 side. Then, after inserting the spring 63 from the open end of the sleeve member 61, the connecting member 62 fixed integrally with the master rope support 50 is inserted. Thereafter, the protrusion 67 is screwed into the recess of the connecting member 62 through the long hole 65 of the sleeve member 61. As a result, the connecting member 62 can be inserted into the sleeve member 61 while the protrusion 67 is inserted through the elongated hole 65 as shown in FIG. Further, since the protrusion 67 is fixed to the connecting member 62 in a state of being inserted through the long hole 65, it is possible to suppress the connecting member 62 from falling off from the sleeve member 61.

  Here, the lateral hole 66a formed in the sleeve member 61 is such that the urging force of the spring 63 when the relative sliding angle of the connecting member 62 with respect to the sleeve member 61 becomes an angle corresponding to the lateral posture of the parent rope support column 50. Is a horizontal hole used for fitting the protrusion 67, and is hereinafter referred to as a “fitting horizontal hole for sideways posture”. On the other hand, when the relative sliding angle of the connecting member 62 with respect to the sleeve member 61 becomes an angle corresponding to the standing posture of the parent rope support column 50, the lateral hole 66b is engaged with the protrusion 67 using the biasing force of the spring 63. This is a horizontal hole used for this purpose, and is hereinafter referred to as “a standing horizontal fitting horizontal hole”. The horizontal mounting fitting horizontal hole 66a and the standing posture fitting horizontal hole 66b are provided from the respective end portions 65a and 65b of the elongated hole 65 toward the opening end side of the sleeve member 61. It has a substantially U shape as a whole including the horizontal holes 66a, 66b.

  FIG. 9 is a diagram illustrating a method of attaching the master rope support 50 to the upper tilt plate 13 of the loading platform 3 through the rotation mechanism 60 according to the embodiment. FIG. 9A shows a state before the parent rope support 50 is attached, and FIG. 9B shows a state after the parent rope support 50 is attached. As shown in FIG. 9A, the upper end surface 13b of the upper tilt plate 13 is formed with an accommodation hole 13c that is a hole for accommodating the rotation mechanism 60 (sleeve member 61) in advance. For example, the accommodation hole 13 c is a hole having a cylindrical shape, and is open to the upper end surface 13 b of the upper stage tilt plate 13.

  After assembling the rotation mechanism 60, the rotation mechanism 60 is inserted into the accommodation hole 13 c formed in the upper tilt plate 13. The receiving hole 13c has a shape and a size so as not to interfere with the protrusion 67 of the connecting member 62 protruding through the long hole 65 of the sleeve member 61 when the rotating mechanism 60 is inserted. After the rotation mechanism 60 is accommodated in the accommodation hole 13c, the fixing portion 64 of the sleeve member 61 is fixed to the upper end surface 13b of the upper tilt plate 13. Accordingly, the master rope support 50 is connected to the upper tilt plate 13 via the rotation mechanism 60. For example, the fixing portion 64 may be rivet fixed to the upper end surface 13 b of the upper stage tilt plate 13. In the state where the fixing portion 64 of the sleeve member 61 is fixed to the upper end surface 13 b of the upper tilt plate 13, the urging force of the spring 63 acts in a direction in which the connecting member 62 is removed from the sleeve member 61. That is, the urging force of the spring 63 acts in the direction of pushing the connecting member 62 out of the accommodation hole 13c of the upper tilt plate 13 to the outside.

  Next, the posture switching operation of the master rope support 50 performed via the rotation mechanism 60 will be described. FIG. 10 is a diagram illustrating a correspondence relationship between the relative sliding angle of the coupling member 62 with respect to the sleeve member 61 and the posture of the parent rope support column 50. FIG. 10A shows a state in which the master rope support 50 is in a sideways posture and the connecting member 62 is locked to the sleeve member 61. FIG. 10B shows a state in which the master rope support 50 is in a sideways posture and the connection member 62 is unlocked with respect to the sleeve member 61. FIG. 10C shows a state in which the parent rope support 50 is in a standing posture and the lock of the connecting member 62 with respect to the sleeve member 61 is released. FIG. 10D shows a state where the master rope support 50 is in a standing posture and the connecting member 62 is locked to the sleeve member 61.

  In the rotation mechanism 60, the projection 67 provided on the connection member 62 is displaced (moved) in the long axis direction of the long hole 65 in accordance with the relative sliding of the connection member 62 with respect to the sleeve member 61. When the projection 67 contacts the end portions 65a and 65b of the elongated hole 65, the relative sliding of the connecting member 62 with respect to the sleeve member 61 in the direction is restricted (restricted). That is, in this embodiment, the sliding range of the connecting member 62 with respect to the sleeve member 61 is regulated within a predetermined range by the elongated hole 65 of the sleeve member 61 and the protrusion 67 of the connecting member 62 inserted into the elongated hole 65. The sliding range restricting means is realized. In the present embodiment, the sliding range of the connecting member 62 with respect to the sleeve member 61 is set to a range of approximately 90 °. When the master rope support 50 standing up with respect to the upper tilt plate 13 is tilted by turning approximately 90 ° along the upper end surface 13 b of the upper tilt plate 13, the protrusion 67 of the connecting member 62. Is set to contact the end portion 65a of the elongated hole 65, and the state shown in FIG.

  Here, the biasing force of the spring 63 acts in a direction in which the connecting member 62 is pulled out from the sleeve member 61 (a direction in which the connecting member 62 is pushed out from the accommodation hole 13c of the upper tilt plate 13). The protrusion 67 of the connecting member 62 is fitted into the fitting horizontal hole 66a for the lateral posture. Thereby, the state shown in FIG. 10B shifts to the state shown in FIG. 10A, and the connecting member 62 is locked to the sleeve member 61. Thereby, as shown to Fig.6 (a), the support | pillar 50 for master ropes can be hold | maintained in a sideways posture.

On the other hand, when using the upper tilt plate 13 as a work scaffold, the upper tilt plate 13 is switched from the standing posture to the horizontal posture as described with reference to FIG. After that, the parent brace 5 in the lying position
The protrusion 67 of the connecting member 62 is pushed out from the fitting horizontal hole 66a for the lateral position by pushing 0 toward the upper end surface 13b of the upper tilt plate 13 against the urging force of the spring 63. Accordingly, the state shown in FIG. 10A can be shifted to the state shown in FIG. 10B, and the lock of the connecting member 62 with respect to the sleeve member 61 can be released. Then, from the state in which the lock of the connecting member 62 is released, the master rope support column 50 is rotated by approximately 90 ° to erect the master rope support column 50. Then, as shown in FIG. 10C, when the projection 67 of the connecting member 62 comes into contact with the end portion 65b of the elongated hole 65, the further rotation of the main rope support 50 (the connecting member with respect to the sleeve member 61) is performed. 62 sliding operation) is regulated. Since the standing posture fitting horizontal hole 66b is connected to the end portion 65b of the elongated hole 65, the projection 67 of the connecting member 62 is fitted into the standing posture fitting horizontal hole 66b by the biasing force of the spring 63. Is done. As a result, the state shown in FIG. 10C shifts to the state shown in FIG. 10D, and the connecting member 62 is locked to the sleeve member 61. Thereby, as shown in FIG.6 (b), the support | pillar 50 for master ropes can be hold | maintained in a standing posture.

  When the main rope support 50 is switched from the standing posture to the sideways posture, the parent rope support 50 in the standing posture is pushed in a direction approaching the upper end surface 13 b of the upper tilt plate 13 against the urging force of the spring 63. For example, the protrusion 67 of the connecting member 62 is pushed out from the fitting horizontal hole 66b for the standing posture, so that the state shown in FIG. 10D is shifted to the state shown in FIG. Thereby, the lock of the connecting member 62 with respect to the sleeve member 61 is released, and the master rope support 50 can be rotated. In this way, by tilting the master rope support 50, the master rope support 50 can be held in a lying position as shown in FIG. In the present embodiment, a spring 63 inserted into the sleeve member 61, a long hole 65 provided in the sleeve member 61, a sideways fitting side hole 66 a, a standing side fitting side hole 66 b, and a protrusion of the connecting member 62. 67 etc. implement | achieve the locking means in this invention.

  Referring to FIG. 2, an example of an installation location of the master rope support 50 for the loading platform 3 is shown. In the example shown in FIG. 2, each side tilt 6 of the loading platform 3 is installed at the front end and the rear end, and the rear tilt 7 is installed at the left end and the right end, respectively. FIG. 11 is a diagram illustrating a state in which a master rope 70 is connected to each master rope support 50 of the loading platform 3 according to the embodiment. FIG. 12 is a diagram illustrating a situation in which loading work is performed using the upper tilt plate 13 according to the embodiment as a scaffold for work. The ring portion 51 of the strut 50 for the main rope in a state in which the pair of lateral tilts 6 and the upper tilt plate 13 of the rear tilt 7 in the loading platform 3 are deployed in a horizontal posture and then raised with respect to the inner surface 13a of the upper tilt plate 13. The master rope 70 can be linked by mooring the hook 71 provided at the end of the master rope 70. Then, the loading work can be performed safely by hanging the hook 21 of the safety belt 20 attached to the worker on the master rope 70 connected to the loading platform 3.

  According to the loading platform working safety device 40 and the truck loading platform 3 having the same according to the present embodiment, as shown in FIGS. 11 and 12, the horizontally expanded upper tilt plate 13 used as a working scaffold. The master rope 70 can be connected to the outer side of the main body. That is, since the master rope 70 can be linked to the outside of the worker who walks on the upper tilt plate 13 used as a work scaffold, the safety during loading work can be improved. Then, the base end side of the main rope support 50 is attached to the upper tilt plate 13 via the rotation mechanism 60 so as to be freely rotatable. Adopted a structure to switch and hold. According to this, when the upper-stage tilt plate 13 is not used as a working scaffold, the parent-line support column 50 can be placed along the upper-stage tilt plate 13 by placing the parent-line support column 50 in a sideways posture. Therefore, it is possible to suppress an obstacle from entering the loading surface 3. Moreover, since it is possible to switch between the lying down posture and the standing posture without attaching or detaching the master rope support 50, there is no possibility of losing the master rope support 50.

Further, according to the loading platform working safety device 40 according to the present embodiment, when the relative sliding angle of the connecting member 62 with respect to the sleeve member 61 becomes an angle corresponding to the standing posture of the main rope support column 50, the sleeve member 61. Since the connecting member 62 is locked, the master rope support 50 can be stably held in the standing posture when the master rope support 50 is used. In addition, since the connecting member 62 is locked to the sleeve member 61 when the relative sliding angle of the connecting member 62 with respect to the sleeve member 61 becomes an angle corresponding to the sideways posture of the supporting rope 50, the connecting member 62 is locked. When the support column 50 is not used, it is possible to suppress the posture of the parent rope support column 50 from fluttering due to vibration, crosswind, and the like when the truck 1 is traveling.

  In the loading platform work safety device 40, a spring 63 is inserted on the inner peripheral side of the sleeve member 61, and the relative sliding angle of the connecting member 62 with respect to the sleeve member 61 corresponds to the standing posture of the main rope support column 50. A structure is adopted in which the projection 67 is fitted into the standing posture fitting lateral hole 66b using the biasing force of the spring 63 when the angle is reached. With this configuration, when the relative sliding angle of the connecting member 62 reaches an angle corresponding to the standing posture of the parent rope support column 50, the connecting member 62 is locked to the sleeve member 61 in conjunction with the angle. be able to. Accordingly, the master rope support 50 can be stably held in the standing posture by a simple mechanism.

  Further, in the loading platform working safety device 40, the biasing force of the spring 63 is used when the relative sliding angle of the connecting member 62 with respect to the sleeve member 61 becomes an angle corresponding to the sideways posture of the main rope support column 50. Thus, a structure in which the protrusion 67 is fitted into the fitting horizontal hole 66a for the laterally inclined posture is adopted. With such a configuration, when the relative sliding angle of the connecting member 62 becomes an angle corresponding to the sideways posture of the parent rope support column 50, the connecting member 62 is locked to the sleeve member 61 in conjunction therewith. can do. Thereby, when the parent rope support 50 is not used, it is possible to suppress the posture of the parent rope support 50 from fluttering due to vibrations, cross winds, and the like when the truck 1 travels with a simple mechanism.

  Further, in the loading platform work safety device 40, the unlocking of the connecting member 62 with respect to the sleeve member 61 causes the main rope support 50 to approach the upper end surface 13b of the upper tilt plate 13 against the biasing force of the spring 63. Since it can be easily done by pushing in the direction, it is very convenient.

  Further, in the loading platform work safety device 40, the standing posture fitting horizontal hole 66 b is provided at one end 65 b in the long axis direction of the long hole 65, and the sideways posture fitting horizontal hole 66 a is provided in the long axis direction of the long hole 65. It is provided at the end 65a. With this configuration, the protrusion 67 that abuts the one end 65 b of the elongated hole 65 is formed by the relative sliding angle of the connecting member 62 corresponding to the standing posture of the parent rope support column 50. The urging force can be used to smoothly fit into the standing posture fitting lateral hole 66b. Further, the protrusion 67 that contacts the other end 65 a of the elongated hole 65 is used by utilizing the biasing force of the spring 63 by the relative sliding angle of the connecting member 62 being an angle corresponding to the sideways posture of the parent rope support column 50. Thus, it can be smoothly fitted into the fitting lateral hole 66a for the lateral posture.

The embodiment described above can be variously modified without departing from the gist of the present invention. For example, in the above-described embodiment, the end portions 65a and 65b of the elongated hole 65 in the sleeve member 61 are provided with the fitting lateral hole 66a for sideways posture and the fitting lateral hole 66b for standing posture. Not limited. For example, only one end portion 65b of the long hole 65 provided in the sleeve member 61 may be provided with the standing posture fitting lateral hole 66b, and the other remaining end portion 65a may not be provided with the lateral posture fitting lateral hole 66a. . This is because the master rope support 50 in the sideways posture is relatively easy to stabilize the posture without special locking. In the above embodiment, the sleeve member 61 is provided with the elongated hole 65 and the connecting member 62 is provided with the protrusion 67, but these may be replaced. That is, the protrusion 67 may be provided on the sleeve member 61 and the elongated hole 65 may be provided on the connecting member 62. Moreover, in this embodiment, although the connection member 62 is made into the rod-shaped member, you may replace with a cylindrical member.

  Moreover, although the truck 1 which concerns on this embodiment is provided with the crane 4, it is not necessary to provide the crane 4. FIG. Moreover, although a pair of entrance door 35 is provided in the right-and-left side surface in the front part of the loading platform 3, installation of these entrance doors 35 can be omitted suitably. For example, a pair of left and right side tilts 6 may be extended to the front end of the loading platform 3.

DESCRIPTION OF SYMBOLS 1 ... Truck 3 ... Loading platform 6 ... Side tilt 7 ... Back tilt 9 ... tilt support 11 ... Lower tilt plate 12 ... Middle hinge 13 ... Upper tilt plate 35 ... Entrance door 40 ... Loading platform safety device 50 ... Master rope support 60 ... Turning mechanism 61 ... Sleeve member 62 ... Connecting member 63 ... Spring 65 ...・ Long hole 67 ... projection

Claims (6)

A two-stage tilter having a lower tilt plate and an upper tilt plate pivotally attached to the lower tilt plate via a hinge;
A posture changing means for holding the posture of the upper tilt plate so as to be switchable between a standing posture standing upright with respect to the loading surface of the loading platform and a horizontal posture extended outward from the standing posture to become horizontal;
A strut for the master rope to connect the master rope,
A rotation mechanism for rotatably mounting the master rope support to the upper tilt plate;
With
The turning mechanism includes a sideways posture in which the master rope column is disposed along the upper end surface of the upper tilt plate, and the parent rope column is moved from the sideways posture to the upper tilt column. Rotating in the out-of-plane direction of the plate and holding the switchable to a standing posture standing on the upper tilt plate ,
A cylindrical sleeve member embedded and fixed in the interior along the height direction of the upper tilt plate from the upper end surface;
A rod-like or tubular connecting member that is slidably inserted along the inner peripheral surface of the sleeve member and connected to the parent rope support;
A sliding range regulating means for regulating a sliding range of the connecting member with respect to the sleeve member within a predetermined range, and a relative sliding angle of the connecting member with respect to the sleeve member corresponds to the standing posture of the main rope support column. Locking means for locking the connecting member to the sleeve member when the angle is reached;
including,
Truck carrier. The sliding range regulating means is
An elongated hole provided in one of the sleeve member and the connecting member and extending along a circumferential direction;
A protrusion provided on the other member of the sleeve member and the connecting member and inserted into the elongated hole;
including,
The truck bed according to claim 1 . The locking means is
An elastic member inserted on the inner peripheral side of the sleeve member and biasing the connecting member in the axial direction;
The urging force of the elastic member is used when the relative sliding angle of the connecting member with respect to the sleeve member is an angle corresponding to the standing posture of the master rope column. A fitting lateral hole for standing posture for fitting the protrusion,
including,
The truck bed according to claim 2 . The locking means is formed in communication with the elongated hole, and the elastic member when the relative sliding angle of the connecting member with respect to the sleeve member becomes an angle corresponding to the sideways posture of the main rope support column. A laterally mounted fitting lateral hole for engaging the protrusion using the urging force of the connecting member, and a relative sliding angle of the connecting member is set to an angle corresponding to the laterally tilted posture of the main rope support column. The connection member is locked to the sleeve member even when
The truck bed according to claim 3 . The standing posture fitting horizontal hole is provided at one end in the long axis direction of the elongated hole, and the sideways posture fitting horizontal hole is provided at the other end in the long axis direction of the elongated hole,
5. A truck bed according to claim 4 . A two-stage tilt having a lower tilt plate and an upper tilt plate pivotally attached to the lower tilt plate via a hinge, and a posture of the upper tilt plate standing upright with respect to the loading surface of the loading platform; And a posture changing means for holding the switchable posture to a horizontal posture expanded outward from the standing posture to become horizontal, and is applied to a truck bed provided with,
A strut for the master rope to connect the master rope,
A rotation mechanism for rotatably mounting the master rope support to the upper tilt plate;
With
The turning mechanism includes a sideways posture in which the master rope column is disposed along the upper end surface of the upper tilt plate, and the parent rope column is moved from the sideways posture to the upper tilt column. Rotating in the out-of-plane direction of the plate and holding the switchable to a standing posture standing on the upper tilt plate ,
A cylindrical sleeve member embedded and fixed in the interior along the height direction of the upper tilt plate from the upper end surface;
A rod-like or tubular connecting member that is slidably inserted along the inner peripheral surface of the sleeve member and connected to the parent rope support;
A sliding range regulating means for regulating a sliding range of the connecting member with respect to the sleeve member within a predetermined range, and a relative sliding angle of the connecting member with respect to the sleeve member corresponds to the standing posture of the main rope support column. Locking means for locking the connecting member to the sleeve member when the angle is reached;
including,
Safety equipment for truck bed work.

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