JP2015009678A - Outrigger retraction restriction device for work vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an outrigger retraction restriction device for a work vehicle with an outrigger, in which physical means allows the slide operation on the retraction side of movable bodies in a jack contracted state and restricts the slide operation on the retraction side of the movable bodies in a jack expanded state.SOLUTION: In a work vehicle with accessories 16 arranged immediately below jack lower end parts in a state where jacks 3 are contracted, slide restriction means 5 that can be engaged or disengaged with fixed parts 21a fixed to a vehicle body side is provided in movable bodies 4 of an outrigger to allow and restrict the slide operation on the retraction side of the movable bodies 4. The slide restriction means 5 operates physically as jack lifting/lowering portions 32 move up and down and prevents the movable bodies from interfering with the accessories during the slide operation on the retraction side of the movable bodies by keeping the movable bodies 4 at the slide restriction position in which the slide of the movable bodies 4 up to a position where they interfere with the accessories 16 is restricted in a jack expanded state.

Description

  The present invention relates to an outrigger storage limiting device for a work vehicle that can limit the storage side sliding operation of the outrigger movable body when the jack is in an extended state during the storage operation of the movable body (inner cylinder and jack) of the outrigger. It is.

  When trucks are equipped with relatively large equipment such as urea tanks (for exhaust gas purification catalysts) and large batteries (for hybrid vehicles), the excess space below the side of the vehicle body is used as the installation space for these equipments. However, many existing various base materials are installed in the excess space below the side of the vehicle body. Therefore, when newly installing the above equipment, it is desirable to use the space immediately below the outrigger jack (the float) as the installation space.

  As described above, for example, a work vehicle with an outrigger shown in FIG. 9 can be assumed as the equipment installation space using the space immediately below the outrigger jack (no float). In the work vehicle with an outrigger of FIG. 9, the outrigger 1 includes a pair of left and right slide beams 2, 2 configured to allow the inner cylinder 22 to slide in the left-right direction with respect to the outer cylinder 21 fixed to the body frame 8 side. It has jacks (a pair of left and right) 3, 3 attached to the tip of the inner cylinder 22. In FIG. 9, the structure and operation of the outrigger 1 will be described in the left part of FIG.

  The jack 3 uses a long jack (having a long stretchable portion at the top) and a lower portion of the jack outer body 31 cut to a predetermined length. Therefore, in the jack 3, a space having a considerable height H0 can be secured below the float 34 in the contracted state. A relatively large equipment 16 such as a urea tank or a large battery can be installed in the space below the float 34 of the jack 3, but the float 34 is located higher than the upper surface of the equipment 16 in the jack-reduced state. Even if the movable body 4 (inner cylinder 22 and jack 3) of the outrigger 1 is slid inward and outward, the entire jack 3 does not interfere with the equipment 16.

  By the way, in a state where the movable body 4 (inner cylinder 22 and jack 3) of the outrigger is extended outward (jack position B in FIG. 9), the jack 3 'is not contracted (for example, the height of the float 34' is high). In the intermediate extension state with a height of H1, the jack lifting / lowering portion 32 ′ (jack inner body 33 ′ and float 34 ′) is superposed in the height range and inward and outward directions of the equipment 16. When the jack 3 'is in the overhanging position B and in the intermediate extension state (for example, the float height is H1), the movable body 4' (inner cylinder 22 'and jack 3') is slid to the storage side. Then, at the jack position C just before the jack 3 'reaches the jack storage position A, the raising / lowering portion 32 "(float 34" in the state of FIG. 9) of the jack 3 "collides with the outer surface 16a of the equipment 16. Will occur.

  In addition, as this kind of arrangement in which equipment such as a tank is arranged directly under the jack float, there is one disclosed in, for example, Japanese Patent Application Laid-Open No. 2002-274783 (Patent Document 1). The thing of FIG. 6 uses what used the long jack and cut the lower half part of the jack as a jack (thing which can ensure a high space below the float in the jack contraction state). And even if it is a thing of this patent document 1 (FIG.5 and FIG.6), if a jack is slid to the storing side in an intermediate | middle extended state, the problem that a jack raising / lowering part (for example, float part) will collide with an equipment. Contains.

  By the way, as mentioned above, it is assumed that the trouble (the float 34 ″ collides with the equipment 16) caused by sliding the movable body (inner cylinder and jack) to the storage side while the jack is in the intermediate extension state is improved. It is easy to prevent the outrigger movable body (inner cylinder and jack) from sliding to the storage side when the reduction state of the jack is electrically detected by a detector and the detector does not detect the reduction state of the jack. For example, when the jack is contracted, the float at the lower end of the jack operates the limit switch (turns ON), and only when the limit switch is in the ON state, the storage side (reduction side) with respect to the slide cylinder Operation is permitted. Otherwise (limit switch is in OFF state), the retract side (reduction side) operation is performed with respect to the slide cylinder. It can be easily controlled to prohibit movement.

Japanese Patent Laid-Open No. 2002-274783 (especially FIGS. 5 and 6)

  However, in the case of electrically detecting the contracted state of the jack and electrically controlling the sliding operation of the outrigger movable body as described above, the structure becomes complicated and the cost is increased, and the failure of the detector It is also considered that malfunction may occur due to disconnection, short circuit, etc., and it is also necessary to design for repair in case of failure.

  Therefore, in the present invention, in a work vehicle in which large equipment is installed at a position directly below the lower end of the jack in a state in which the outrigger is retracted, the sliding movement of the movable body on the storage side is limited when the jack is extended. An object of the present invention is to provide an outrigger storage restriction device for a work vehicle.

  The present invention has the following configuration as means for solving the above problems. In the present invention, the movable body having the inner cylinder and the jack can be slid between the inner storage position and the outer protrusion position with respect to the outer cylinder fixed to the body frame. Further, the present invention is intended for a work vehicle in which the outrigger is used and the equipment is installed at a position directly below the lower end of the jack in a state where the movable body is positioned at the retracted position and the jack is contracted.

  By the way, as explained in the background section above, when a truck is equipped with relatively large equipment such as a urea tank (for exhaust gas purification catalyst) or a large battery (for hybrid vehicle), the equipment must be installed. It is desirable to use the space immediately below the outrigger jack (the float) as the space. In this way, when the space immediately below the outrigger jack (or its float) is used as the equipment installation space, the jack float is stored in the space immediately above the equipment in the outrigger retracted state.

  Further, in this way, with the jack float being stored in the space immediately above the above-mentioned equipment in the jack reduced state, in the state where the movable body (inner cylinder and jack) of the outrigger is extended outward When the jack is extended (including the intermediate extended state), the jack lifting part (jack interior and float) is superposed in the height range and inward and outward direction of the above equipment, so the jack extended state (intermediate extended state) If the movable body is slid to the storage side in the state (including the state), a problem occurs that the jack lifting portion collides with the outer surface of the equipment before the jack reaches the jack storage position.

  Therefore, in the present invention, in a work vehicle in which equipment is installed directly under the jack lower end (float) in the outrigger retracted state, the movable body is retracted from the extended position when the jack is in the extended state (including the intermediate extended state). An outrigger storage limiting device is provided that limits the sliding movement of the movable body on the storage side before the lifting portion of the jack interferes with the equipment.

  The outrigger storage restriction device of the present invention is configured as follows. That is, the movable body is detachably engaged with a fixed portion (for example, an appropriate position of the outer cylinder of the slide beam) fixed to the vehicle body side to allow or restrict the sliding movement of the movable body on the storage side. Slide limiting means is provided.

  The slide restricting means is physically operated in accordance with the vertical movement of the lifting / lowering portion of the jack, and when the jack is in the contracted state, the slide restricting means is positioned at a slide allowable position that allows the movable body to slide, while the jack is in the extended state. Then, when the movable body slides from the extended position side to the storage side, the movable body is positioned at a slide restriction position that restricts the movable body from sliding to the storage side until it interferes with the equipment.

  By the way, the slide limiting means used in the present application is attached to an appropriate position of the movable body (for example, the lower end portion of the jack exterior body), and is physically operated along with the vertical movement of the lifting and lowering portion of the jack. Although it is displaced to the slide permissible position and the slide restricting position according to each of the above conditions, specifically, the structure shown in each embodiment described later can be used.

  In the outrigger storage limiting device of the present invention, when the jack is in the extended state (including the intermediate extended state), the movable body is moved from the extended position side because the slide limiting means is located at the slide restricting position. The sliding movement of the movable body is restricted before the lifting part of the jack interferes with the equipment when sliding to the storage side.

  When the jack is in the contracted state, the slide restricting means is located at the slide allowable position, so that the movable body can be freely slid to the extended position side and the retracted position side.

  As described above, when the outrigger movable body is in the extended position and the jack is in the extended state (including the intermediate extended state), the outrigger storage restricting device of the present invention can Since the slide restricting means that is physically actuated is positioned at the slide restricting position, the following effects are obtained.

  That is, when the movable body is on the extended position side and the jack is in the extended state, the slide restricting means is located at the slide restricting position. There is an effect that it is possible to prevent the part from interfering with the equipment.

  Further, since the slide limiting means used in the present application is physically operated (physically interlocking) with the up-and-down movement of the lifting / lowering portion of the jack, the outrigger storage can be reliably limited. There is an effect.

  Furthermore, since the slide limiting means used in the present application is physically interlocked as described above, the structure is simpler and cheaper than, for example, an electric means. In addition, there is no effect of malfunction due to failure or disconnection, and there is an effect that the troublesomeness of designing for repair in case of such failure can be eliminated.

It is explanatory drawing of the outrigger part in the working vehicle which employ | adopted the outrigger storage restriction apparatus of 1st Embodiment of this application. It is the II section enlarged view of FIG. 1, and is principal part sectional drawing in the state which stored the outrigger. FIG. 3 is a state change view from FIG. 2, and is a cross-sectional view of a state where a movable body of an outrigger is extended outward. FIG. 4 is a state change view from FIG. 3, which is a cross-sectional view in a state where the movable body of the outrigger is slid to the storage side until the slide restricting unit functions. It is explanatory drawing of the outrigger part in the working vehicle which employ | adopted the outrigger storage restriction apparatus of 2nd Embodiment of this application. FIG. 6 is an enlarged view of a part VI in FIG. 5, which is a cross-sectional view of a main part in a state where an outrigger is stored. It is a state change figure from Drawing 6, and is a sectional view in the state where the movable body of an outrigger was made to project outward. FIG. 8 is a state change view from FIG. 7, which is a cross-sectional view in a state where the movable body of the outrigger is slid to the storage side until the slide restricting unit functions. FIG. 2 is a view corresponding to FIG. 1 and serving as a reference example (comparative) of the present application.

  Hereinafter, an outrigger storage restriction device for a working vehicle according to an embodiment of the present invention will be described with reference to FIGS. 1 to 8. FIGS. 1 to 4 show the first embodiment of the present application, and FIGS. 2nd Embodiment is shown.

  First, common parts of the first embodiment shown in FIGS. 1 to 4 and the second embodiment shown in FIGS. 5 to 8 will be described with reference to FIGS.

    Although FIG. 1 shows a work vehicle with an outrigger, the outrigger 1 used here is mainly installed between the front end portion of the truck bed and the rear surface of the cabin, and floats on the front side of the vehicle. Used for supporting the vehicle in an inclined state.

  The outrigger 1 has a pair of left and right slide beams 2, 2 including an outer cylinder 21 and an inner cylinder 22, and jacks 3, 3 provided at the distal end of each inner cylinder 22. Since the outrigger 1 is configured to be bilaterally symmetric with respect to the left and right center position, the left half in FIG. 1 will be described in the following description.

  The outrigger 1 is mounted on the body frame 8 in a left-right orientation. In the outrigger 1, the outer cylinder 21 of the slide beam 2 is fixed to the vehicle body frame 8, and the outer cylinder 21 corresponds to a fixing portion in claims.

  The slide operation of the inner tube 22 of the slide beam 2 is generally performed by a slide cylinder (not shown), but a slide operation by human power is also applicable. In the outrigger 1 of this embodiment, the jack 3 provided at the distal end portion of the inner cylinder 22 is positioned between the storage position A shown by a solid line in FIGS. 1 and 2 and the extended position B shown by a chain line (reference numeral 3 ′). It can be slid in the left, right, inside and outside directions. In the outrigger 1, the inner cylinder 22 and the jack 3 constitute the movable body 4 in the claims.

  A crane device 10 is mounted on the upper part of the outrigger 1. The crane apparatus 10 can perform crane work by attaching a telescopic boom 12 to the upper end of a post 11 that can be swiveled horizontally and lifting and lowering a hook (not shown) suspended from the tip of the boom with a winch 13. It is what I did.

  On the upper part of the outrigger 1, there are provided various operation levers 14, 14,... Such as a post turning operation lever, a boom raising / lowering operation lever, a boom telescopic operation lever, a winch operation lever, an outrigger slide operation lever, a jack expansion / contraction operation lever. . These various operation levers 14, 14,... Are provided in pairs on the left and right sides of the vehicle, and can be operated from either the left or right side.

  The jack 3 is configured such that the inner body 33 can be moved up and down by a jack cylinder (not shown) with respect to the outer body 31 fixed to the distal end portion of the inner cylinder 22. A float 34 is attached to the lower end portion of the interior body 33. The float 34 has a larger inward width, and can be placed on the lower end of a lifting / lowering rod 51 of a slide restricting means (stopper material) 5 to be described later on the upper surface of the width portion. Note that the interior body 33 and the float 34 in the jack 3 constitute the lifting portion 32 of the jack 3 in the claims.

  The jack 3 uses a long jack (having a long stretchable portion at the top) and a lower portion of the jack outer body 31 cut to a predetermined length. Therefore, in the jack 3, a space having a considerable height H0 can be secured immediately below the float 34 in the contracted state.

  In the working vehicle of this embodiment, as shown in FIG. 1, a urea tank (left side), a large battery (right side) and the like are placed in a space (in the height H0) immediately below the jack 3 (float 34) in a reduced state. The relatively large equipment 16 is installed.

  By the way, in the jack contracted state, the float 34 of the jack 3 is located higher than the upper surface of the equipment 16, so that the entire jack 3 can be moved even if the movable body 4 (inner cylinder 22 and jack 3) of the outrigger 1 is slid inward and outward. Does not interfere with the equipment 16.

  On the other hand, in a state in which the movable body 4 (inner cylinder 22 and jack 3) of the outrigger 1 is extended outward (jack position B in FIG. 1), the jack 3 'is not contracted (for example, the float in FIG. 1). In the intermediate extension state in which the height of 34 ′ is H 1, the jack elevating part 32 ′ (jack inner body 33 ′ and float 34 ′) is superposed in the height range of the equipment 16 and inward and outward directions. When the jack 3 'is in the overhanging position B and in the intermediate extension state (for example, the float height is H1), the movable body 4' (inner cylinder 22 'and jack 3') is slid to the storage side. 9, at the jack position C immediately before the jack 3 ′ reaches the jack storage position A, the lifting portion 32 ″ (float 34 ″ in the state of FIG. 9) of the jack 3 ″ is the outer surface of the equipment 16. The trouble of colliding with 16a occurs.

  Therefore, in each embodiment of the present application, when the jack 3 is in the extended state (including the intermediate extended state), the lifting / lowering portion 32 of the jack 3 interferes with the equipment 16 when the movable body 4 is stored from the extended position side. An outrigger storage limiting device that restricts sliding to the storage side. Hereinafter, each outrigger storage restriction device of the first embodiment of FIGS. 1 to 4 and the second embodiment of FIGS. 5 to 8 will be described individually.

[First Embodiment of FIGS. 1 to 4]
In the outrigger storage limiting device according to the first embodiment, the outer cylinder 21 serving as a fixing portion fixed to the vehicle body is detachably engaged with the outer cylinder 31 at the lower position of the outer casing 31 of the jack 3 serving as the movable body 4. Thus, there is provided a slide restricting means 5 for allowing or restricting the sliding movement of the movable body 4 on the storage side.

  The slide restricting means 5 used in the first embodiment includes, as shown in enlarged views in FIGS. 2 to 4, the inner cylinder 22 at the upper end of a bar 51 having a predetermined length in the vertical direction on the outrigger center side. An elevating stopper material is used in which a spacing member 52 that protrudes a predetermined length toward the inner side is fixed, and an engaging body 53 that projects downward is fixed to the inner side end of the spacing member 52. . The slide restricting means 5 and the stopper material are the same, and the slide restricting means may be referred to as the stopper material 5 in the following description.

  In this stopper material 5, the rod body 51 serves as a guide rod when the stopper material 5 is raised and lowered, and the spacing member 52 slides the movable body 4 to the storage side when the jack is extended as will be described later (FIG. 4). In this case, the jack lifting part (float 34) serves as a spacer for preventing the collision with the equipment 16 (outer end face 16a), and the engaging body 53 is then removed (in the state of FIG. 4). The movable body 4 is engaged with the tip of the cylinder 21 so that the movable body 4 can no longer slide to the storage side. As shown in FIG. 4, the length of the spacing member 52 is such that the lifting / lowering portion 32 (float 34) of the jack 3 in a state where the engaging body 53 is engaged with the distal end portion (bottom plate distal end surface 21a) of the outer cylinder 21. Is set to a length that can prevent further approaching the equipment 16 side.

  On the other hand, a vertically oriented guide body 55 that guides the stopper material 5 so as to be movable up and down is fixed to the inner surface near the lower end of the exterior body 31 of the jack 3. The guide body 55 is provided with a guide hole 56 through which the rod body 51 of the stopper material 5 is inserted vertically.

  Then, the stopper member 5 is inserted into the guide hole 56 of the guide body 55 from above by inserting the rod body 51 of the stopper member 5 so that the stopper member 5 can be moved up and down with respect to the guide body 55. ing. In addition, it is preferable that the rod body 51 of the stopper material 5 is not rotated with respect to the guide hole 56 of the guide body 55. Specifically, the rod 51 is not rotated in the guide hole 56 by fitting the rod 51 and the guide hole 56 into a quadrangular cross section.

  The stopper material 5 is moved downward by its own weight with respect to the guide body 55. The stopper material 5 is physically moved up and down as the elevating part 32 (float 34) of the jack 3 moves up and down to allow the movable body 4 of the outrigger to slide (FIG. 2). And a position (FIG. 4) that restricts sliding to the storage side. That is, in the contracted state of the jack 3, as shown in FIG. 2, the float 34 of the jack 3 pushes up the lower end portion of the rod body 51 of the stopper member 5, so that the lower surface height of the engaging body 53 is lowered to the outer cylinder 21. On the other hand, when the jack 3 is extended, the push-up action to the bar 51 is released and the stopper material 5 is released as shown in FIGS. 3 and 4 while being maintained above the upper surface of the bottom plate. It moves down by its own weight (at this time, the lower surface of the spacing member 52 contacts the upper surface of the bottom plate of the inner cylinder 22), and the engaging body 53 is positioned at the same height as the bottom plate front end surface 21a of the outer cylinder 21 (the slide regulating position Become). When the stopper member 5 moves up and down, the engaging body 53 moves up and down in a hole 23 provided in the bottom plate of the inner cylinder 22.

  The outrigger storage restriction device of the first embodiment shown in FIGS. 1 to 4 functions as follows. Note that equipment 16 such as a urea tank and a large battery is installed at a position directly below the jack 3 below the side of the vehicle body.

  First, when the outrigger 1 is not in use, the movable body 4 (inner cylinder 22 and jack 3) of the outrigger 1 is in the retracted position on the inner side and the jack 3 is contracted as shown by the solid line in FIGS. It is in a state. At this time, as shown in FIG. 2, the float 34 of the jack 3 is slightly higher than the upper surface of the equipment 16 installed below the side of the vehicle body, and the stopper material 5 sticks on the upper surface of the float 34. The body 51 is pushed upward to maintain the stopper material 5 at the slide allowable position. In a state where the stopper material 5 is in the slide allowable position, as shown in FIGS. 1 and 2, the movable body 4 (inner cylinder 22 and jack 3) is moved to the storage position A (solid line illustrated position) and the overhang position B ( The position can be freely slid between the position indicated by the chain line).

  Next, when the jack 3 is extended in a state where the movable body 4 is in the overhanging position B (the position 4 ′ in FIG. 2), the float 34 with respect to the stopper material 5 (rod body 51) as shown in FIG. The stopper member 5 is moved down by its own weight due to the loss of the supporting force due to the above, and the engaging body 53 protrudes downward from the bottom plate bottom surface of the inner cylinder 22 through the hole 23 of the bottom plate of the inner cylinder 22. When the engagement body 53 protrudes downward from the bottom surface of the bottom plate of the inner cylinder 22 in this way, the engagement body 53 comes to be positioned at the same height as the bottom plate front end surface 21a of the outer cylinder 21 (that is, the stopper material 5 slides). Located in a regulated position).

  By the way, as shown in FIG. 3, when the jack 3 is extended, the jack inner body 33 and the float 34 are aligned with the height range of the equipment 16 in the horizontal direction, and the movable body 4 is moved into the storage position A ( When sliding to FIG. 1), the float 34 collides with the outer surface 16 a of the equipment 16 as indicated by reference numeral 34 ″ in FIG. 9.

  However, in the case of using the slide restricting means (stopper material) 5 of the first embodiment, when the movable body 4 slides to the storage side from the state of FIG. 3, as shown in FIG. Before the float 34) collides with the outer side surface 16a of the equipment 16 (at the jack position D), the engaging body 53 of the stopper material 5 engages with the bottom plate front end surface 21a of the outer cylinder (fixed portion) 21, The movable body 4 cannot slide to the storage side any more.

  Accordingly, in the outrigger storage limiting device of the first embodiment shown in FIGS. 1 to 4, when the movable body 4 is in the extended position B and the jack 3 is in the extended state (FIG. 3), the slide limiting means (stopper) Since the material 5 is located at the slide restricting position, even if the movable body 4 is slid to the storage side, it is possible to prevent the lifting / lowering portion of the jack from interfering with the equipment. Further, since the slide restricting means (stopper material) 5 is physically actuated (physically interlocked) with the vertical movement of the jack lifting / lowering portion 32, the outrigger storage can be reliably restricted. . Furthermore, since the slide limiting means (stopper material) 5 is physically interlocked as described above, the structure is simple and inexpensive compared to, for example, an electrical means. In addition, there is no malfunction due to failure or disconnection, and the troublesomeness of designing for repair in case of such failure can be eliminated.

[Second Embodiment of FIGS. 5 to 8]
The outrigger storage limiting device of the second embodiment shows a modification of the slide limiting means (stopper material 5) in the first embodiment, and the slide limiting means 6 used in the second embodiment is as follows. The jack 3 is attached in a vertically swinging manner at the lower end portion of the exterior body 31.

  That is, the slide restricting means employed in the second embodiment shown in FIGS. 5 to 8 also uses the stopper member 6 to restrict the excessive sliding movement of the movable body 4. The stopper member 6 used in the second embodiment has a downward projecting portion 62 and an upward projecting portion 63 at the base end portion (outer end portion) of the horizontally long spacing member 61 having a predetermined length inward. And a locking step portion 64 for locking the bottom plate tip surface 21a of the outer cylinder 21 is provided at the tip (inner end) of the spacing member 61.

  The stopper member 6 is pivotally supported by a pin 66 on a bracket 65 provided on the inner surface near the lower portion of the exterior body 31 of the jack 3 so that the gap holding member 61 is supported by the pin 66. The pin 66 is supported so that it can swing up and down in the vertical plane around the pin 66. Further, the stopper member 6 is attached in a state in which the spacing member 61 is biased in the counterclockwise direction (the locking step portion 64 side is upward) about the pin 66 by a spring (hook spring) 67.

  Also in the second embodiment, the spacing member 61 of the stopper member 6 is equipped with a jack lifting / lowering part (float 34) when the movable body 4 slides to the storage side in the jack extended state as will be described later (FIG. 8). 16 (outer end surface 16a) serves as a spacer for preventing the collision.

  And the stopper material (slide restricting means) 6 of this 2nd Embodiment functions as follows.

  First, when the jack 3 is in the contracted state, the stopper material 6 assumes the posture shown in FIGS. That is, in the jack-reduced state, the upper surface of the float 34 of the jack 3 pushes the downward projecting portion 62 of the base end portion of the spacing member 61 from below against the urging force of the spring 67, and the spacing member 61 is pinned. By rotating clockwise about 66, the locking step 64 at the distal end of the spacing member is positioned below the bottom plate distal end surface 21a of the outer cylinder 21 (that is, the stopper member 6 is allowed to slide). Located). As shown in FIGS. 5 and 6, when the locking step 64 at the distal end of the spacing member is located below the bottom plate distal end surface 21 a of the outer cylinder 21, the movable body 4 (inner cylinder 22 and jack 3). Can slide freely over the entire stroke range.

  On the other hand, when the jack 3 is extended, the stopper material 6 assumes the posture shown in FIGS. In other words, in the jack extended state, when the float 34 moves downward, the push-up force with respect to the downward projecting portion 62 is released, and the spacing member 61 rotates counterclockwise by the biasing force of the spring 67. The upward projecting portion 63 of the end abuts against the side surface on the inner surface side of the jack exterior body 31 so that the locking step portion 64 at the distal end portion of the spacing member becomes the same height as the bottom plate distal end surface 21 a of the outer cylinder 21. (That is, the stopper material 6 is positioned at the slide restricting position).

  And when the latching step part 64 of a stopper material front-end | tip part is located in the same height as the bottom-plate front end surface 21a of the outer cylinder 21 in this way, the movable body 4 will be stored from the overhanging position B shown in FIG. 8, before the jack lifting / lowering portion 32 (float 34) collides with the outer surface 16 a of the equipment 16 (at the jack position D), as shown in FIG. The movable body 4 is brought into contact with the bottom plate front end surface 21a of the outer cylinder 21 which is a fixed portion so that the movable body 4 cannot slide further to the storage side.

  Accordingly, the outrigger storage limiting device according to the second embodiment shown in FIGS. 5 to 8 also has the following functions (effects) as in the first embodiment.

  That is, when the movable body 4 is in the extended position B and the jack 3 is in the extended state, the slide restricting means (stopper material 6) is located at the slide restricting position as shown in FIG. Even if it is slid to the storage side, it is possible to prevent the lifting portion of the jack from interfering with the equipment. Further, the slide restricting means (stopper material) 6 is physically actuated (physically interlocked) with the vertical movement of the jack lifting / lowering section 32, so that the outrigger storage can be reliably restricted. . Furthermore, since the slide limiting means (stopper material) 6 is physically interlocked as described above, the structure is simple and inexpensive compared to, for example, the one that takes into account electrical means. In addition, there is no malfunction due to failure or disconnection, and the troublesomeness of designing for repair in case of such failure can be eliminated.

  In addition to the first and second embodiments, the present invention can be implemented as follows.

  First, in each of the first and second embodiments, the slide restricting means (stopper materials 5 and 6) are installed in the jack exterior body 31 that is a part of the movable body 4, but in other embodiments, The slide restricting means (stopper materials 5 and 6) may be attached to the distal end portion of the inner cylinder 22 that is a part of the movable body 4.

  In each of the first and second embodiments, the bottom plate front end surface 21a of the outer cylinder 21 is used as a fixed portion fixed to the vehicle body for detachably engaging the slide restricting means (stopper materials 5 and 6). Although adopted, in other embodiments, the fixing portion may be any fixing portion fixed to the vehicle body.

  1 is an outrigger, 2 is a slide beam, 3 is a jack, 4 is a movable body (inner cylinder and jack), 5 is a slide restricting means (stopper material) of the first embodiment, and 6 is a slide restricting means of the second embodiment ( (Stopper material), 8 is a body frame, 16 is an accessory, 21 is an outer cylinder, 21a is a front end surface of a bottom plate serving as a fixing part, 22 is an inner cylinder, 31 is an exterior body of a jack, 32 is a lifting / lowering part of the jack, 33 is An interior body 34 of the jack is a float.

Claims (1)

For the outer cylinder fixed on the vehicle body side, using an outrigger that allows the movable body having the inner cylinder and the jack to slide between the retracted position on the inner side and the extended position on the outer side, Further, in a work vehicle in which the movable body is positioned at the storage position and the equipment is installed at a position directly below the lower end of the jack in a state where the jack is contracted,
The movable body is provided with a slide restricting means for allowing the movable body to be retracted by allowing the movable body to be detachably engaged with a fixed portion fixed to the vehicle body side,
The slide restricting means is physically operated in accordance with the vertical movement of the lifting / lowering portion of the jack, and is located at a slide allowable position that allows the movable body to slide when the jack is in a contracted state. In the extended state, when the movable body slides from the extended position side to the storage side, the movable body is positioned at a slide restriction position that restricts the movable body from sliding to the storage side until it interferes with the equipment. Yes,
An outrigger storage restriction device for a work vehicle.

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