JP2012254844A - Structure of detecting driver and reach-type forklift - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a reach-type forklift that prevents a driver footrest space present on the upper face of its floor plate from decreasing, prevents the installation position of the floor plate from rising, and prevents the attachment/detachment performance of the floor plate from worsening.SOLUTION: A hinge structure capable of turning a floor plate 41 is constituted of a rotary shaft 51 disposed on a lower position relative to the uppermost floor face 41A of the floor plate 41, and a holding member 61 that holds the rotary shaft 51 between itself and the floor plate 41, and therefore the hinge structure is prevented from protruding upward relative to the uppermost floor face 41A. The floor plate 41 can easily be attached to a driver cab by making the holding member 61 hold the rotary shaft 51 between itself and the floor plate 41, and can easily be detached therefrom by pulling the rotary shaft 51 out of the gap between the floor plate 41 and the holding member 61 subsequent to widening the gap therebetween. The movement of the floor plate 41 can easily be restricted by the structure of holding the rotary shaft 51 between the floor plate 41 and the holding member 61.

Description

  The present invention relates to an occupant detection structure and a reach-type forklift.

  2. Description of the Related Art Conventionally, a reach-type forklift (hereinafter referred to as “forklift”) that operates a vehicle while an operator stands in a driver's seat is known as a vehicle used for transporting luggage. Examples of the operation of the vehicle include operations of forks (claws) and masts (posts) provided in front of the forklift vehicle, operations in the front-rear direction, turning right, turning left, and the like.

  In the forklift described above, from the viewpoint of ensuring safety, a configuration that allows the fork to move up and down and travel only when the operator is standing in the driver's seat is employed (for example, Patent Document 1). reference.). In Patent Document 1, a floor plate, which is a plate member disposed on the floor surface of a driver's seat, is rotatably supported by a hinge mechanism provided at one end portion, and an operator standing in the driver's seat A configuration is disclosed in which a detection switch detects a movement (sinking) in which the other end of the floor plate moves downward due to its weight.

  When the detection switch detects that the other end of the floor plate is depressed, it is determined that the operator is standing in the driver's seat, and operations such as raising and lowering the fork and running are possible. On the other hand, when the sinking of the other end of the floor plate is not detected, it is determined that the operator is getting out of the driver's seat, and operations such as raising and lowering the fork and running are disabled.

  Furthermore, since the hinge mechanism described in Patent Document 1 is configured to be attached to the lower surface of the floor plate, the entire upper surface of the floor plate is placed on the surface on which the operator's foot standing on the driver's seat is placed (hereinafter referred to as “occupant”). It is described as “footrest space”.), And the passenger footrest space is easily secured.

  As a configuration for rotatably supporting the floor plate using the hinge mechanism, in addition to the configuration of Patent Document 1 described above, a configuration of a hinge mechanism that makes it easy to attach and detach the floor plate is also disclosed (for example, Patent Document 1). 2). The hinge mechanism described in Patent Literature 2 does not require a tool such as a screwdriver when attaching and detaching the floor plate (referred to as “toe board main body” in Patent Literature 2), It is the structure which restricts the shakiness of the left-right direction.

  Further, the hinge mechanism described in Patent Document 2 has a simpler structure of the hinge mechanism than the hinge mechanism described in Patent Document 1, and may require less space for installation of the hinge mechanism. Then, compared with the forklift that employs the hinge mechanism of Patent Document 1, the forklift that employs the hinge mechanism of Patent Document 2 can realize a configuration in which the floor plate is closer to the floor surface (low floor vehicle layout). it can.

JP 2009-083985 A JP 2007-022678 A

  The hinge mechanism described in Patent Document 1 is provided at the end of the floor plate on the side of the entrance where an operator gets on and off, and a part of a fixing member such as a bolt for fixing the hinge mechanism to the vehicle body of the forklift is externally provided. (See FIGS. 3 and 7 of Patent Document 1). Thus, if the fixing member is exposed at a position where it can be directly seen from the outside, there is a problem that the appearance of the forklift tends to be damaged. In particular, since the area around the entrance where the operator frequently gets on and off is an area where the operator's attention is easily drawn, the problem of deteriorating the appearance tends to become obvious.

  In addition, since the first bracket of the hinge mechanism is fixed to the body of the forklift, it is difficult to shrink the space required for the arrangement of the hinge mechanism in the vertical direction, and a low floor vehicle layout in which the floor plate is closer to the floor surface is achieved. There was a problem that it was difficult to realize.

  The hinge mechanism described in Patent Document 2 uses a bearing portion to limit backlash in the vertical direction of the floor plate and restrict backward movement, so that the notch recess formed in the floor plate and the hinge bearing It is the structure which restricts the rattling to the left-right direction of a floor plate by fitting. However, the forward movement of the floor plate is not limited by the hinge mechanism, and there is a possibility that the floor plate and the side wall of the driver's seat may come into direct contact.

  The present invention has been made in order to solve the above-described problem. The present invention suppresses a decrease in a space for placing an occupant foot provided on an upper surface of a floor plate and an increase in an arrangement position of the floor plate. It is an object of the present invention to provide an occupant detection structure and a reach forklift that can suppress deterioration in detachability.

In order to achieve the above object, the present invention provides the following means.
The occupant detection structure of the present invention includes a floor plate that constitutes the floor surface of the driver's seat in the vehicle body, and a portion that faces one end of the floor plate in the driver's seat, and is below the uppermost surface of the floor plate. Is located between the columnar or cylindrical pivot shaft, which is the pivot center of the floor plate, and the floor plate. And a clamping portion that is rotatable in the direction. In the occupant detection structure of the present invention, whether or not an occupant is in the driver's seat is detected by detecting the vertical rotation at the other end of the floor plate.

  According to the occupant detection structure of the present invention, a hinge structure that allows the floor plate, the pivot shaft, and the clamping portion to pivot in the vertical direction at the other end of the floor plate is configured. Furthermore, since the pivot shaft is disposed at least below the surface on which the pivot axis is the top, in other words, the surface on which the occupant's feet ride, the hinge structure described above is disposed below the floor surface. It becomes easy to arrange | position and the upward protrusion from the floor surface in a hinge structure is suppressed.

  Attach the floor plate to the driver's seat by sandwiching the pivot shaft between the floor plate and the clamping part, and remove the pivot axis from the space between the floor plate and the clamping part. This can be done by moving the floor plate. In other words, regardless of whether the floor plate is attached or detached, the rotating shaft can be fixedly disposed on the driver's seat (or vehicle body). In other words, without using a fixing member that is partially exposed to the outside of the vehicle body, such as a bolt, the rotating shaft can be arranged in the driver's seat by a fixing method such as welding that does not expose the fixed portion to the outside of the vehicle body. it can. Further, since the pivot shaft is sandwiched between the floor plate and the sandwiching portion to form the hinge structure, it is easy to restrict the movement of the floor plate in the direction intersecting the center line of the pivot shaft and in the center line direction.

  In the above invention, at least a portion of the floor plate that is in contact with the rotating shaft is a recessed portion that is recessed downward, and is arranged in the order of the sandwiching portion, the rotating shaft, and the recessed portion from above to below. desirable.

  In this way, the recess is formed in the floor plate, and the sandwiching portion is disposed so as to sandwich the rotation shaft on the upper surface of the recess, so that the floor plate can be easily attached to and detached from the driver's seat. Specifically, the floor plate having a larger area than the sandwiching portion is disposed on the lower side, so that when the floor plate is attached to the driver's seat, the rotation shaft is positioned at a predetermined position between the floor plate and the sandwiching portion. It is easy to check visually whether it has been placed. Furthermore, even if the relative arrangement position of the floor plate and the sandwiching portion is misaligned, an operator who attaches the floor plate can easily reach both the floor plate and the sandwiching portion, and the misalignment of the placement position can be easily corrected. Moreover, even if the hinge structure is configured on the upper surface of the recess, the hinge structure is disposed below the floor surface by arranging the holding portion so as to sandwich the rotation shaft on the upper surface of the recess. It becomes easy.

  In the above invention, at least one of the floor plate and the sandwiching portion is in contact with the circumferential surface of the rotating shaft, and the floor plate is moved in at least three different radial directions among the radial directions of the rotating shaft. It is desirable to provide a restricting part to restrict.

  Thus, by providing the restricting portion that contacts the circumferential surface of the rotation shaft and restricts the movement of the floor shaft in the radial direction in the floor plate, the movement of the floor plate in the radial direction is reliably suppressed. be able to. In particular, it is possible to reliably suppress the rattling of the floor plate by suppressing the movement in three or more different radial directions. In addition, a control part may be provided only in a floor plate, may be provided only in a clamping part, and may be provided in both.

  In the above-described invention, the flange portion extending in the shape of a disk from the circumferential surface of the rotating shaft toward the radially outer side is provided, and a slit is formed in at least one of the floor plate and the sandwiching portion so that the flange portion is accommodated inside. It is desirable that

  By providing the flange portion extending in a disk shape from the circumferential surface of the rotating shaft to the outer side in the radial direction as described above, the flange portion is disposed inside the slit provided in at least one of the floor plate and the sandwiching portion. Further, the movement of the pivot shaft in the center line direction in the floor plate and the sandwiching portion is reliably suppressed. Specifically, when the floor plate and the sandwiching portion move in the direction of the center line of the rotation shaft, the flange portion contacts the side surface of the slit. Thereby, the movement to the centerline direction of the rotating shaft in a floor plate and a clamping part is suppressed reliably. The slit may be provided only on the floor plate, or may be provided on both the floor plate and the sandwiching portion.

The reach type forklift of the present invention is provided with a vehicle body provided with a driver's seat on which an occupant is boarded, a cargo handling unit for handling luggage, and the occupant detection structure according to the present invention.
According to the reach type forklift of the present invention, since the occupant detection structure of the present invention is provided, the footrest space is secured while securing the function of detecting the occupant's towering, and the appearance of the reach type forklift Can be prevented from being damaged.

  According to the occupant detection structure and the reach forklift of the present invention, the rotating shaft is disposed at a position below the uppermost surface of the floor plate constituting the floor surface of the driver's seat, and is rotated by the floor plate and the holding portion. By constructing a hinge structure that allows the floor plate to be pivoted with the moving shaft in between, it is possible to suppress a decrease in the space for occupant foot placement on the upper surface of the floor plate and an increase in the position of the floor plate, and There is an effect that deterioration of the detachability of the plate can be suppressed.

It is a mimetic diagram explaining the whole forklift concerning the embodiment of the present invention. It is a top view explaining the schematic structure of the passenger | crew detection structure of FIG. It is XX sectional view explaining schematic structure of the passenger | crew detection structure of FIG. It is a partial expanded sectional view explaining the other Example of the principal part in the passenger | crew detection structure of FIG.

  A reach type forklift according to an embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a schematic diagram illustrating the overall configuration of a forklift 1 according to this embodiment, FIG. 1 (a) is a plan view, and FIG. 1 (b) is a side view.

  The forklift 1 according to this embodiment is used for transporting luggage, and is particularly used for cargo handling work in a factory, a warehouse, a freight station, a port, or the like. As shown in FIG. 1, the forklift 1 is mainly provided with a vehicle main body 10 on which a driver (occupant) rides and a cargo handling unit 20 that handles luggage.

  The vehicle body 10 is mainly provided with a front wheel 11 and a rear wheel 12 used for traveling of the forklift 1, an outrigger 13 on which the front wheel 11 is disposed, and a driver seat 14 on which a driver rides.

  The front wheels 11 are a pair of wheels respectively disposed at the front end of the outrigger 13 as shown in FIGS. 1 (a) and 1 (b). In the present embodiment, description will be made by applying to an example in which the front wheel 11 is an idle wheel in which the direction of the rotation shaft is fixed with respect to the vehicle body 10. The rear wheel 12 is a single wheel disposed at the left rear end of the vehicle body 10. The rear wheel 12 is a driving wheel to which a rotational driving force is transmitted from a driving unit (not shown) such as a motor, and the traveling direction of the forklift 1 in which the direction of the rotating shaft with respect to the vehicle body 10 can be changed. It is also a steering wheel to be determined. In the present embodiment, description will be made by applying to an example in which auxiliary wheels (not shown) are further provided below the driver's seat 14.

  The outriggers 13 are a pair of arm-like members provided on the lower front side of the vehicle main body 10, and are arranged so as to extend in parallel from the left and right ends of the front lower end of the vehicle main body 10 toward the front. . A cargo handling section 20 is disposed between the pair of outriggers 13 and 13, and the cargo handling section 20 is movable between the pair of outriggers 13 and 13 in the front-rear direction.

  The driver's seat 14 is a place where the driver enters (boards) the forklift 1 and operates the forklift 1 in a standing posture. The driver's seat 14 is provided at the right rear end of the vehicle body 10, and a handle 15 for steering the rear wheel 12 is provided. In addition, an operation unit 16 such as a lever for operating the cargo handling unit 20 is provided in the driver's seat 14.

  FIG. 2 is a schematic diagram illustrating a schematic configuration of the occupant detection structure 30 in the present embodiment. 3A is a cross-sectional view taken along the line XX for explaining a schematic configuration of the occupant detection structure 30 of FIG. 2, and FIG. 3B illustrates a configuration of a main part of the occupant detection structure 30 of FIG. FIG.

  Further, the driver's seat 14 is provided with an occupant detection structure 30 that detects whether or not the driver has boarded the forklift 1. The occupant detection structure 30 prevents the forklift 1 from traveling or the cargo handling unit 20 from operating when the driver is not in the driver's seat 14 of the forklift 1. As shown in FIGS. 2 and 3, the occupant detection structure 30 is mainly provided with a floor plate 41, a rotation shaft 51, a clamping unit 61, and a detection sensor 71.

  The floor plate 41 is a plate-like member constituting the floor surface 41A of the driver's seat 14, and the floor mat 31 on which the driver directly puts his / her foot is disposed on the floor surface 41A. A front end (one end) of the floor plate 41 is provided with a recess 42 and a slit 43 that constitute a hinge structure in the occupant detection structure 30. The floor plate 41 is sometimes called by a different name such as a toe board (see Patent Document 2) in addition to the name of the floor plate.

  The concave portion 42 is a portion sandwiched between the pair of slits 43, 43 in the floor plate 41, and is a portion recessed downward by one step compared to other portions such as the floor surface 41 </ b> A in the floor plate 41. is there. For example, it is a portion formed by bending a portion sandwiched between the pair of slits 43, 43 in the floor plate 41 into a crank shape.

  The slits 43 are a pair of cuts extending in parallel from the front side to the rear side of the floor plate 41, and are formed between the floor plate 41 and the recess 42. Furthermore, the slit 43 also forms a space in which the collar portion 52 described later is disposed.

  The floor mat 31 covers almost the entire upper surface of the floor plate 41, and an insertion portion 32 into which the end portion of the floor plate 41 is inserted is provided at the rear end portion. The floor mat 31 can be exemplified by a plate-like member formed from a resin having elasticity such as rubber, but is not particularly limited as long as it is formed from a material having elasticity.

  The rotation shaft 51 is a member formed in a columnar shape or a cylindrical shape that constitutes a hinge structure in the occupant detection structure 30, and is disposed below the floor surface 41 </ b> A of the floor plate 41 and above the recess 42. It is a thing. The central portion of the rotation shaft 51 is formed to extend substantially linearly in the left-right direction, both end portions are formed to bend in the front-rear direction, and both end portions are formed on the vehicle body 10 that constitutes the front portion of the driver seat 14. It is fixed. A pair of flanges 52 are provided at the center of the rotation shaft 51.

  The flange 52 is a disk-shaped member that extends radially outward from the circumferential surface of the rotation shaft 51. The flange portion 52 is disposed inside the slit 43 and comes into contact with the side of the recess 42 on the slit 43 side, and restricts movement of the recess 42 and the floor plate 41 in the left-right direction.

  The sandwiching portion 61 is configured to sandwich and hold the rotation shaft 51 between the recess 42 and constitute a hinge structure in the occupant detection structure 30. The sandwiching portion 61 is a plate-like member having an area equal to or smaller than the concave portion 42 in a top view, and is fixed to the concave portion 42 using a fixing portion 53 such as a bolt. Therefore, a through hole through which the fixing portion 53 is inserted is formed in the sandwiching portion 61 and the concave portion 42. In the present embodiment, description will be made by applying to an example in which the sandwiching portion 61 is fixed to the fixing portion 53 by two sets of fixing portions 53, but the fixing portion 53 may be fixed to one set, or three sets It may be fixed by the above fixing part 53 and is not particularly limited.

  The sandwiching portion 61 is provided with a groove portion 62 that is open downward and forms a triangular prism-like space in which the central portion of the rotation shaft 51 is disposed. The groove part 62 is comprised from the 1st control part 63,63 which is a pair of side wall. The first restricting portion 63 is a wall surface extending diagonally forward and upward, or a wall surface extending diagonally forward and downward, and when the floor plate 41 and the sandwiching portion 61 move in the front-rear direction, It contacts and regulates the movement of the floor plate 41 and the like in the front-rear direction.

  The portion of the recess 42 that covers the opening of the groove 62 is a second restricting portion 44 that functions in the same manner as the first restricting portion 63. The first restricting portion 63 and the second restricting portion 44 come into contact with the center portion of the rotating shaft 51 when the floor plate 41 and the sandwiching portion 61 are about to move in the up-down direction, and the up-down direction in the floor plate 41 etc. The movement to is restricted.

  The detection sensor 71 is a sensor arranged on the lower surface of the floor plate 41 on the rear end (other end) side, and the rear of the floor plate 41 when the driver gets on the upper surface of the floor plate 41 or gets off. It is a sensor that detects the movement of the end.

  The detection sensor 71 is a sensor that contacts when the rear end of the floor plate 41 moves downward, and can detect the presence or absence of contact of the rear end of the floor plate 41. Any sensor that can detect the movement of the rear end of 41 may be used, and the detection method is not particularly limited.

  As shown in FIGS. 1 (a) and 1 (b), the cargo handling unit 20 includes a fork 21 used to load a load, a lifting body 22 to which the fork 21 is attached, a fork 21 and a lifting body 22. A mast 23 that moves in the vertical direction is mainly provided.

  The fork 21 is a pair of arm-like members provided on the front surface of the elevating body 22, and is arranged so as to extend in parallel from the left and right ends of the lower end of the front surface of the elevating body 22 toward the front. The fork 21 is inserted into an insertion hole of a pallet formed in a substantially rectangular parallelepiped shape on which a load is placed, and lifts or lowers only the pallet or the pallet on which the load is placed.

  The elevating body 22 supports the fork 21 and is movable up and down along the mast 23 by an elevating cylinder (not shown) arranged between the elevating body 22 and the mast 23. .

  The mast 23 is a pair of columnar members arranged in parallel and facing each other, and is arranged extending in the vertical direction. Further, the pair of masts 23 and 23 are supported by the fork 21 and the lifting body 22 disposed between them so as to be vertically movable.

Next, the operation of the forklift 1 having the above-described configuration when carrying a load will be described with reference to FIG.
As shown in FIG. 1, the forklift 1 travels to the vicinity of the load with the cargo handling unit 20 being reached, and stops at a position where the fork 21 faces the insertion hole of the pallet. Thereafter, the cargo handling unit 20 is pushed out (reached out) to the front of the forklift 1, and the fork 21 is inserted into the insertion hole of the pallet.

  Thereafter, the pallet is lifted by the cargo handling unit 20 and the cargo handling unit 20 is drawn to the vehicle body 10 (reached in). The forklift 1 turns rightward or leftward, travels to a desired position, and then turns rightward or leftward again to place a load.

  Next, a method for detecting the presence or absence of a driver who is an occupant in the occupant detection structure 30 which is a feature of the present embodiment will be described. In the present embodiment, description will be made by applying to an example in which the rear end of the floor plate 41 is pushed upward by an urging member (not shown) such as a spring.

  When the driver gets on the upper surface of the floor plate 41, the force pushing the rear end of the floor plate 41 downward due to the weight of the driver overcomes the pushing force of the urging member, and the floor plate 41 is centered on the rotating shaft 51. It rotates and the rear end of the floor plate 41 moves downward. The detection sensor 71 detects the downward movement of the rear end of the floor plate 41.

  The detection sensor 71 that detects the downward movement of the rear end of the floor plate 41 outputs a detection signal to a control unit (not shown) that controls the operation of the forklift 1, and the control unit travels and loads the forklift 1. The control for prohibiting the operation of the unit 20 is released.

  On the other hand, when the driver descends from the upper surface of the floor plate 41, the floor plate 41 rotates about the rotation shaft 51 by the pushing force of the urging member, and the rear end of the floor plate 41 moves upward. The detection sensor 71 detects the upward movement of the rear end of the floor plate 41.

  The detection sensor 71 that has detected the upward movement of the rear end of the floor plate 41 stops outputting the detection signal that has been output so far. In the above-described control unit, when the input of the detection signal is interrupted, the control for prohibiting the traveling of the forklift 1 and the operation of the cargo handling unit 20 is resumed.

Further, a method for attaching and detaching the floor plate 41 constituting the occupant detection structure 30 will be described with reference to FIG.
First, a method for removing the floor plate 41 will be described. First, the floor mat 31 laid on the upper surface of the floor plate 41 is removed, or the front end of the floor mat 31 is turned to expose the recess 42. Next, the bolt that is the fixing portion 53 that fixes the clamping portion 61 is loosened. Thereafter, the rear end of the floor plate 41 is moved upward, and the floor plate 41 is moved rearward so that the rotating shaft 51 is passed through the gap between the wide sandwiching portion 61 and the recessed portion 42, whereby the floor plate 41 is removed.

  Next, a method for attaching the floor plate 41 will be described. First, the fixing portion 53 that fixes the clamping portion 61 to the concave portion 42 is loosened, that is, a gap is formed between the clamping portion 61 and the concave portion 42. Next, the holding part 61 and the recessed part 42 are made to approach the rotating shaft 51 with the front end of the floor plate 41 inclined downward and the rear end inclined upward. The rotation shaft 51 is passed through the gap between the holding portion 61 and the recess 42, and the rotation shaft 51 is disposed inside the groove portion 62. The inclination of the floor plate 41 is made horizontal, and the clamping part 61 and the concave part 42 are brought into close contact with each other by tightening the bolt as the fixing part 53 so that the rotating shaft 51 cannot move out of the groove part 62. Finally, the floor mat 31 is disposed so as to cover the entire upper surface of the floor plate 41, and the mounting of the floor plate 41 is completed.

  According to the above configuration, the floor plate 41 (concave portion 42), the rotation shaft 51, and the clamping portion 61 can constitute a hinge structure that allows the rear end of the floor plate 41 to rotate in the vertical direction. . Further, since at least the pivot shaft 51 is disposed below the floor surface 41A on which the driver's feet ride on the floor plate 41, the above-described hinge structure is easily disposed below the floor surface 41A. Thus, the hinge structure is prevented from protruding upward from the floor surface 41A. For this reason, it is possible to suppress a decrease in the driver's footrest space provided on the floor surface 41 </ b> A that is the upper surface of the floor plate 41, and to suppress an increase in the arrangement position of the floor plate 41.

  The floor plate 41 is attached to the driver's seat 14 by sandwiching the rotating shaft 51 between the floor plate 41 (recess 42) and the sandwiching part 61, and the removal is performed between the floor plate 41 (recess 42) and the sandwiching part 61. This can be done by moving the floor plate 41 so that the interval is widened and the pivot shaft 51 is removed from between them. In other words, regardless of whether the floor plate 41 is attached or detached, the rotation shaft 51 can be fixedly disposed on the driver's seat 14 (or the vehicle body 10). That is, the rotation shaft 51 can be arranged on the driver's seat 14 (or the vehicle body 10) by a fixing method such as welding in which the fixed portion is not exposed to the outside of the vehicle body 10, and the passenger detection structure that does not impair the appearance of the forklift 1 30.

  By forming the recess 42 in the floor plate 41 and disposing the sandwiching portion 61 so as to sandwich the rotating shaft 51 on the upper surface of the recess 42, the floor plate 41 (recess 42) having a larger area than the sandwiching portion 61 is located on the lower side. Will be placed. Thereby, when attaching the floor plate 41 to the driver's seat 14, it becomes easy to visually confirm whether or not the rotation shaft 51 is disposed at a predetermined position between the floor plate 41 (concave portion 42) and the clamping portion 61. Furthermore, even if the relative arrangement position of the floor plate 41 (recess 42) and the sandwiching portion 61 is misaligned, an operator who installs the floor plate 41 can easily reach both the floor plate 41 and the sandwiching portion 61. It is easy to correct the displacement of the arrangement position.

  Furthermore, by arranging the pinching portion 61 so as to sandwich the rotating shaft 51 on the upper surface of the concave portion 42 to configure the hinge structure, even if the hinge structure is configured on the upper surface of the concave portion 42 in the floor plate 41, the floor surface 41A The hinge structure can be arranged below the lower part.

  Since the pivot shaft 51 is sandwiched between the concave portion 42 and the sandwiching portion 61 to form a hinge structure, the front and rear direction which is a direction intersecting the center line of the pivot shaft 51 in the floor plate 41 and the left and right directions which are the center line direction. It becomes easier to regulate movement in the direction.

  By providing the first restricting portion 63 and the second restricting portion 44 that are in contact with the circumferential surface of the turning shaft 51 and restrict the movement of the turning shaft 51 in the radial direction in the floor plate 41 and the sandwiching portion 61, The movement of the floor plate 41 and the clamping part 61 in the radial direction can be reliably suppressed. In particular, the rattling of the floor plate 41 can be reliably suppressed by suppressing the movement in three or more different radial directions.

  By providing a flange 52 extending in a disk shape from the circumferential surface of the rotating shaft 51 toward the outside in the radial direction, the flange 52 is disposed inside a slit 43 provided in the floor plate 41, whereby the floor plate 41 is provided. And the movement to the left-right direction which is the centerline direction of the rotating shaft 51 in the clamping part 61 can be suppressed reliably. That is, when the floor plate 41 and the sandwiching portion 61 move in the left-right direction, the flange portion 52 comes into contact with the side surface of the slit 43, so that the movement in the left-right direction in the floor plate 41 and the sandwiching portion 61 is reliably suppressed.

  Note that the slits 43 may be provided only on the floor plate 41 as in the above-described embodiment, or may be provided on both the floor plate 41 and the sandwiching portion 61, and are not particularly limited.

4 (a) and 4 (b) are partially enlarged cross-sectional views for explaining another embodiment of the main part of the occupant detection structure 30 of FIG.
As in the above-described embodiment, the pair of first restricting portions 63 and 63 may be provided in the sandwiching portion 61, and the second restricting portion 44 may be provided on the surface of the recess 42 facing the first restricting portion 63. 4 (a) and 4 (b), a pair of second restricting portions 44, 44 are provided in the recess 42, and the first restricting portion is provided on the surface of the clamping portion 61 facing the second restricting portion 44. 63 may be provided and is not particularly limited.

  In the embodiment shown in FIG. 4A, the first restricting portion 63 constitutes a horizontally extending surface, and the second restricting portion 44 disposed on the rear side constitutes a surface inclined downward toward the front, The 2nd control part 44 arrange | positioned in this comprises the surface which inclines upward toward the front. In the embodiment shown in FIG. 4 (b), the first restricting portion 63 constitutes a surface that tilts upward toward the front, and the second restricting portion 44 arranged on the rear side constitutes a horizontally extending surface, and the front side The 2nd control part 44 arrange | positioned in this comprises the surface extended toward upper direction.

  The technical scope of the present invention is not limited to the above embodiment, and various modifications can be made without departing from the spirit of the present invention. For example, in the above-described embodiment, the present invention has been applied to a reach-type forklift. However, the present invention is not limited to a reach-type forklift, and may be applied to industrial vehicles such as other types of forklifts. It can be done.

  DESCRIPTION OF SYMBOLS 1 ... Forklift (reach type forklift), 10 ... Vehicle main body, 14 ... Driver's seat, 20 ... Cargo handling part, 30 ... Passenger detection structure, 41 ... Floor plate, 42 ... Recessed part, 43 ... Slit, 44 ... 2nd control part, 51: Rotating shaft, 52: Gutter, 61 ... Clamping part, 63 ... First regulating part

Claims (5)

A floor plate constituting a floor surface of a driver's seat in the vehicle body;
A portion of the driver's seat facing the one end of the floor plate, disposed at a position lower than the uppermost surface of the floor plate, and having a columnar or cylindrical shape serving as a center of rotation of the floor plate A pivot axis;
A sandwiching portion that sandwiches the pivot shaft with the floor plate and allows the other end of the floor plate to pivot in the vertical direction with respect to the vehicle body;
Is provided,
An occupant detection structure that detects whether or not an occupant is in the driver's seat by detecting vertical rotation at the other end of the floor plate. In the floor plate, at least a portion in contact with the rotation shaft is a recess recessed downward.
2. The occupant detection structure according to claim 1, wherein the occupant detection structure is arranged in the order of the sandwiching portion, the rotating shaft, and the concave portion from above to below.   At least one of the floor plate and the clamping portion is in contact with the circumferential surface of the rotation shaft, and the movement of the floor plate in at least three different radial directions of the rotation shaft is restricted. The occupant detection structure according to claim 1 or 2, further comprising a restricting portion. A flange extending in a disk shape from the circumferential surface of the rotating shaft toward the radially outer side is provided,
4. The occupant detection structure according to claim 1, wherein at least one of the floor plate and the sandwiching portion is formed with a slit in which the collar portion is accommodated. 5. A vehicle body provided with a driver's seat on which passengers board,
A cargo handling department that handles luggage,
The occupant detection structure according to any one of claims 1 to 4,
Reach-type forklift characterized by that.

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