JP2010265674A - Working machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a working machine which can easily conduct positioning of and fixedly operate a stand and/or a stand stay along with the change in the posture of the stand and which has enhanced workability. <P>SOLUTION: The working machine is provided with a lift cylinder 26 of which one end is connected to a hitch 22 of the working machine to be installed on a vehicle, a main beam 23 to which another end of the lift cylinder 26 is installed, and a boom 24 which is extended from the main beam 23 and on the tip end of which an attachment 25 is installed through an installing member, a stand 31 of which one end is pivotally connected by a rotating shaft 33 and which supports the working machine S by grounding another end in a stand fixing section 32 of the boom 24, a stand supporting body 41 which supports the stand 31 in the middle of the stand 31. The stand 31 is slidable in the longitudinal direction of the stand 31 through the rotating shaft 33 and a positioning member 36 is installed in a projected manner below the rotating shaft 33 while the stand fixing section 32 is provided with a cut 35 for storing position which fits the positioning member 36 at a storing position b of the stand 31 and a cut 34 for using position which fits the positioning member 36 at a using position a of the stand 31. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a work machine that is detachably attached to a front portion of a vehicle, and more specifically, a stand of the work machine is slidable in a longitudinal direction of the stand via a rotation shaft, and the rotation shaft The positioning member protrudes downward, and the stand fixing portion includes a storage position cutout portion for fixing the positioning member at the stand storage position and a use position cutout portion for fixing at the use position of the stand. Related to the machine.

  Conventionally, in a work machine such as a front loader that is detachably mounted on a work vehicle such as a tractor, when the work machine is attached to or detached from the vehicle, a stand provided in the work machine is moved and fixed to a use position or a storage position. However, in the fixing position of the stand, the engaging pin is inserted into the locking hole, the beta pin is inserted into the through hole of the engaging pin, and the stand is fixed (for example, Patent Document 1), or a stand stay is provided. When attaching and detaching the work implement to the vehicle using the stand, the stand stay tip and the stand tip at the stand storage position and the stand stay tip and the middle part of the stand by the boss with the pin insertion hole at the stand stay tip Are fixed with a fixing pin to fix the stand (Patent Document 2).

Japanese Patent Laid-Open No. 11-266605 JP 2000-170196 A

However, in a working machine such as Patent Document 1, when changing the position of the stand, there may be a problem that the operation and positioning of the engagement pin, which may require a tool, are troublesome and the workability is poor, and the stand is fixed. Since a stand stay for assisting is not provided, the support of the stand may be insufficient.
In addition, in the working machine such as Patent Document 2, although the stand can be stably supported by the stand stay, the diameter of the fixing pin and the pin insertion hole is substantially equal, so the position of the pin insertion hole and the fixing pin can be changed by changing the posture of the stand. Even when they are matched (positioning), it is difficult to fit the fixing pin into the pin insertion hole, and there is a problem that these operations are troublesome and workability is low.
SUMMARY OF THE INVENTION An object of the present invention is to provide a work machine with improved workability, which can easily perform positioning and fixing operations of a stand and a stand stay accompanying a change in stand posture.

  Therefore, the invention according to claim 1 is directed to a lift cylinder having one end connected to a hitch of a work machine attached to a vehicle, a main beam to which the other end of the lift cylinder is attached, and extending from the main beam. A boom having an attachment attached to the tip via an attachment member, and a stand for supporting the work implement by pivoting one end to a stand fixing portion of the boom with a rotating shaft and grounding the other end In the working machine having a stand support member for supporting the stand in the middle of the stand and detachably attached to the vehicle, the stand slides in the longitudinal direction of the stand via the rotating shaft. A positioning member that protrudes below the pivot shaft, and the stand fixing portion includes a notch for storage position that fits the positioning member at the storage position of the stand; Wherein the serial and a notch for use position is fitted in the position of use of the stand.

  According to a second aspect of the present invention, in the work machine according to the first aspect, the rotation shaft is formed on the stand by expansion and contraction of an elastic member provided between the rotation shaft and the positioning member. The inside of the elongated hole is rocked.

  According to a third aspect of the present invention, in the work machine according to the first aspect, a fixture provided at the other end of the stand support is attached to and detached from the storage position fixing portion and the use position fixing portion. While providing the free hole part, the said hole part consists of an entrance / exit part and a holding | maintenance part from which a magnitude | size differs.

  According to the first aspect of the present invention, the lift cylinder having one end connected to the hitch of the work machine attached to the vehicle, the main beam having the other end attached to the lift cylinder, and the main beam extending from the main beam. A boom with an attachment attached to the tip via an attachment member, and a stand for supporting the work machine by pivoting one end to the stand fixing part of the boom with a rotating shaft and grounding the other end. In a working machine that is provided with a stand support that supports the stand in the middle of the stand and is detachably mounted on the vehicle, the stand is slidable in the longitudinal direction of the stand via a rotating shaft, In addition, a positioning member protrudes below the rotating shaft, and the stand fixing portion is fitted at the position where the stand is used with a notch for storing position where the positioning member is fitted at the storage position of the stand. Because and a use position notches that, the operator simply by sliding and rotating the stand, without the need for such additional tools and fastener, the orientation position of the stand can be easily changed. Therefore, it is possible to provide a working machine with improved workability.

  According to the second aspect of the present invention, the rotating shaft swings in the elongated hole formed in the stand by the expansion and contraction of the elastic member provided between the rotating shaft and the positioning member. When the posture is changed, the stand before the change is easily slid to release the fitting of the positioning member from the notch, and after the change due to the rotation of the stand, the operator is released from the stand by the urging of the elastic member. Even if the hand is released, the positioning member can be automatically fitted into the notch. Therefore, it is possible to provide a working machine with improved workability.

  According to the third aspect of the present invention, the storage position fixing portion and the use position fixing portion are provided with the hole portion in which the fixture provided at the other end portion of the stand support body is detachable, and the hole portion. Is made up of an entry / exit part and a holding part of different sizes, so that when the fixture provided on the other end of the stand is fitted into the hole part of the fixing part provided on the boom, it is fixed by the entry / exit part of the fixing part. The tool can be easily inserted into and removed from the hole. Therefore, it is possible to provide a working machine with improved workability.

It is a left view of a wheel type tractor as an agricultural work vehicle concerning one example of the present invention. It is a left view of the wheel type tractor which attached the work machine to the front part. It is the left view of the front part of the body which expanded and showed the front work machine part. It is a left view of the front part of the front work machine which expands and shows a stand part. It is a rear view of a boom fixing | fixed part and a stand. It is a side view of the front part of the front work machine which fixed the stand provided with a stand support body in a use position. It is an expanded side view of the fixing | fixed part in a stand support body. It is a rear view of the fixing | fixed part in a stand support body. It is a side view of the front part of the front work machine which fixed the stand provided with a stand support body in the storing position. It is a left view of the front part of the front work machine which shows the stand support body which provided the rotating shaft in the boom side. It is a front view of the lock groove provided in the stand side which supports a stand support body.

Hereinafter, the best mode for carrying out the present invention will be described in detail with reference to the drawings.
FIG. 1 is a left side view of a wheel type tractor as a farm vehicle according to an embodiment of the present invention, and FIG. 2 is a left side view of the wheel type tractor with a work machine attached to the front part. In addition, the tractor illustrated in the figure is not limited to the wheel-type tractor of the lops specification, and may be a cabin specification, a crawler type, and the like. Furthermore, the tractor is not limited to the tractor, and a snowplow as a work vehicle, Any vehicle can be used as long as the work machine can be attached and detached, such as a construction work vehicle.

  As shown in FIGS. 1 and 2, the tractor 1, which is a working vehicle of this example, includes a front wheel 3 and a rear wheel 4 before and after the body frame 2, and forms a hood 5 above the front wheel 3. An engine 6 as a prime mover section and a clutch housing 7 are disposed behind the engine 6, and a transmission case 8 is disposed behind the clutch housing 7. Power from the engine 6 is transmitted to the front wheels 3 and the rear wheels. 4 is transmitted. A cabin 9 is provided on the body frame 2 continuously to the rear part of the bonnet 5.

  Next, an operating pedal such as a brake pedal and a clutch pedal 10, a steering handle 11, a seat 12, and the like are provided in the cabin 9 as a vehicle control unit.

  Furthermore, various operation levers 14 such as a main transmission lever, a sub transmission lever, and a PTO transmission lever are projected from the left and right fenders 13 provided on both sides of the seat 12. And the windshield 15, the rear glass 16, the door 17, the roof 18, etc. may be attached to the outer periphery of the cabin 9, respectively. The tractor 1 is not limited to the cabin specification described above, and may be a rops specification.

  The power from the engine 6 is applied to a work implement mounting device such as a universal joint or a three-point link type at the rear of the vehicle from a PTO shaft (not shown) protruding from the mission case 8 or via a hydraulic case (not shown). In addition to driving a rear working machine (not shown) mounted via the front, a front working machine S mounted on the front and rear of the vehicle via a pair of left and right hitches 21 installed at the front of the vehicle body is provided at the front of the vehicle. Driven.

  The hitch 21 is installed in a vertically rising manner via a pair of left and right stays 21a installed in the middle of the body frame 2, and is connected to the upper end of each hitch 21 in a generally portal-type connection frame 21b. Is straddled.

  Next, the specific configuration of the working machine, which is a feature of the present invention, will be described. 3 is a left side view of the front part of the machine body showing the enlarged front work machine part, FIG. 4 is a left side view of the front part of the front work machine showing the enlarged stand part, and FIG. 5 is a view of the boom fixing part and the stand. It is a rear view.

  First, as shown in FIG. 3, the front work machine S as an example of a front loader has a pair of left and right hitches 22 installed at the rear part of the front work machine S, and a base end portion pivotally supported by each hitch 22. A pair of left and right booms 24 with the main beam 23 interposed in the part, an attachment 25 such as a bucket detachably attached via an attachment member between the tips of the booms 24, and driving the booms 24 up and down. A pair of left and right lift cylinders 26 interposed between each main beam 23 and each hitch 22, and between the left and right sides of the attachment 25 for rotating the attachment 25 and the middle part of each lift arm 24. It comprises a pair of left and right attachment cylinders 27 and the like. In the figure, 28 is an attachment link (attachment member), 29 is an interlocking link (connecting member), and 30 is an interlocking rod (connecting member).

  In addition, a pair of left and right stands 31 for standing (raising) the front work machine S on the ground when the front work machine S described above is attached to and detached from the machine body are provided at the front end of each boom 24. It is installed so as to be rotatable in the longitudinal direction of the machine body around the moving shaft 33 (fulcrum pin). Note that the stand 31 may be provided on one of the left and right sides. 2 to 4, a stand stay (a stand support member to be described later) is omitted, but in the present invention, the front work machine S can be erected only by the stand 31.

  The stand 31 is formed in a rod shape with a substantially U-shaped cross-section and has a lower end at the front part of the boom 24 as shown in FIGS. The stand fixing part 32, which is a substantially U-shaped pivot support in the rear view with the lower part opened, is pivoted between the use position a and the storage position b via the rotation shaft 33. Worn.

  A use position notch 34 is formed at the use position a of the stand 31 in the stand fixing part 32, and a storage position notch 35 is formed at the storage position b of the stand 31.

  Further, the stand 31 is positioned on both side surfaces thereof, in the vicinity of the end of the pivot support 32, such as a metal pin that can be fitted into the notch 34 for use position and the notch 35 for storage position. The member 36 is protruded by welding or the like.

  As shown in FIG. 5, an elastic member 37 such as a spring is interposed between both ends of the rotation shaft 33 and the positioning member 36, and as shown in FIG. The hole that penetrates the rotation shaft 33 of the stand 31 is a long hole 38 that allows the rotation shaft 33 to rotate in the longitudinal direction of the stand 31.

  Accordingly, the positioning member 36 is normally fitted into the use position notch 34 or the storage position notch 35 in a state in which the positioning member 36 is always pulled toward the rotating shaft 33 by the urging force of the elastic member 37. Note that heads 39 that prevent the elastic member 37 from falling off may be formed at both ends of the rotation shaft 33 and the positioning member 36.

  Here, the front part of the machine body is moved in and out between the booms 24, and attachment or detachment between both hitches 21 and 22 is performed. When the front work machine S is detached, the stand 31 is rotated from the storage position b to the use position a. At this time, in a state where the attachment 25 is grounded, the operator first grasps the stand 31 held at the storage position b with his / her hand so that the stand 31 is directed toward the rear of the grounding portion at the lower end of the elastic member 37. Pull against the bias.

  As a result, the rotation shaft 33 located at the end of the long hole 38 on the lower end side (grounding portion) of the stand 31 is slid in the long hole 38 to the end of the long hole 38 on the upper end side of the stand 31. Since the positioning member 36 inserted into the storage position notch 35 moves outward from the storage position notch 35 and the stand fixing portion 32, the positioning member 36 is inserted into the storage position notch 35. The fixed state at the storage position b of the stand 31 is released.

  Next, the operator rotates the stand 31 to the use position a where the grounding portion of the stand 31 is grounded to the ground and the positioning member 36 is located in the vicinity of the use position notch 34 with the rotation shaft 33 as the rotation fulcrum. Move.

  Then, when the operator removes his / her hand from the stand 31, the positioning member 36 is pulled toward the rotating shaft 33 by the urging of the elastic member 37, so that the positioning member 36 is fitted into the use position notch 34. At the same time, the rotating shaft 33 slides to the end of the long hole 38 on the lower end side (grounding portion) of the stand 31. As a result, the stand 31 is fixed at the use position a by fitting the positioning member 36 into the use position notch 34.

  Next, when the front work machine S is mounted, when the stand 31 is rotated from the use position a to the storage position b, the worker holds the stand 31 at the use position a while the attachment 25 is grounded. By pulling the stand 31 against the urging force of the elastic member 37 toward the back of the grounding portion at the lower end by grasping with the hand in the same manner as described above, the rotation shaft 33 is moved to the use position within the elongated hole 38. The cutout 34 and the pivot support 32 are moved outward.

  Next, the stand 31 is rotated to the storage position b using the rotation shaft 33 as a rotation fulcrum, and the operator releases the hand from the stand 31, so that the stand 31 is positioned by the biasing of the elastic member 37. By being inserted into the notch 34 for use position 36, it is fixed at the use position a.

  With such a configuration, when changing the posture position of the stand 31, the operator does not need a tool and can easily operate, and a locking member for fixing the stand 31 at each posture position. Need not be used separately, and it is possible to omit the manufacturing process of losing the locking member or forming the locking portion of the locking member in the pre-work machine S.

  Note that the use posture of the stand 31 is not limited to the use position a described above, and by providing another notch portion in the positioning member 36 in accordance with the use angle of the stand 31, the stand 31 can be used at an appropriate use posture. Can be fixed.

  Next, in this invention, the stand 31 can be further stably supported on the stand 31 provided with the fixing method in each posture position described above using the stay. 6 is a side view of a front portion of the front work machine in which a stand provided with a stand support is fixed at a use position, FIG. 7 is an enlarged side view of a fixing portion of the stand support, and FIG. 8 stores a stand provided with the stand support. FIG. 9 is a front view of the fixing portion of the stand support body.

  First, as shown in FIG. 6, a stand support body 41 is provided between the stand 31 and the boom 24. The stand support body 41 is a thin metal plate having a thin thickness, and a rotating shaft 42 integrated with the stand support body 41 provided at one end is pivotally connected to the middle portion of the stand 31. .

  The other end of the stand support 41 has a cylindrical shape made of metal, and a fixture 43 such as a pin having a stopper s formed on the end is welded toward the inside of the front work machine S. Installed.

  Further, the position fixing portion 45 for use position for fixing the other end portion (rear end portion) of the stand support 41 to the front and rear portions of the lower end portion in the middle portion of the boom 24 behind the stand fixing portion 32. And the upper end part of the fixing | fixed part 46 for storage positions is attached by bolt fastening or welding.

  That is, at the use position a of the stand 31, the use position fixing portion 45 is attached to the lower end of the boom 24 where the other end of the stand support 41 is located, and at the storage position b of the stand 31, the stand support 41. A storage position fixing portion 46 is attached to the lower end portion of the boom 24 where the other end portion is located.

  These both fixing parts 45 and 46 are metal plate-like members, and, as shown in FIG. 7A, for example, a fixing tool 43 can be inserted into the center part of the fixing part 45. As shown in FIG. 7B, a fixing tool is provided in the hole portion 47 having a substantially bowl shape (not limited to the configuration described below) and the central portion of the fixing portion 46 arranged in the vertical direction. Holes 48 having a substantially bowl shape (which is not limited and may be any of the configurations described later) arranged in the lateral direction in a side view are formed so that 43 can be inserted.

  The holes 47 and 48 are formed such that the holding part c has a diameter substantially equal to the diameter of the fixture 43 and the entrance / exit part d has a larger diameter than the stopper s. Therefore, the holding part c and the entrance / exit part d of the holes 47 and 48 are in communication with each other, and the maximum width in the longitudinal direction of the entrance / exit part d is larger than that of the holding part c. Further, the fixed portion 45 is supported by a knob bolt (may be a butterfly bolt or the like) that allows the holding portion c and the entrance / exit portion d to be switched between a communication state and a blocking state on the back side (or the front side). A member 45a is provided.

  Here, as described above, when the stand 31 is moved from the storage position b to the use position a and the stand 31 is supported and fixed by the stand support 41, the stand 31 is fixed at the storage position b as shown in FIG. In addition, the other end portion of the stand support body 41 is fixed to the storage position fixing portion 46 by the fixing tool 43.

  At this time, in the storage position fixing portion 46, the fixture 43 of the stand support body 41 is locked by the holding portion c of the hole 48 that is substantially equal to the diameter of the fixture 43, so that the stand support body 41 is stored It is securely fixed to the position fixing part 46, and the stopper 43 of the fixing tool 43 prevents the fixing tool 43 from coming off from the holding part c in the storage position fixing part 46.

  Then, the operator pulls the stand 31 toward the rear of the front work machine S against the biasing force of the elastic member 37 as described above, so that the stand support body 41 is also interposed via the rotation shaft 42. Are slid toward the rear of the front work machine S.

  At this time, the fixture 43 of the stand support 41 fitted to the holding portion c in the hole 48 of the storage position fixing portion 46 is moved into the entrance / exit portion d, and the fixture 43 is moved from the entrance / exit portion d. Removed. When the stand 31 does not include the elastic member 37 as described above, a notch (not shown) that allows the rotation shaft 42 to slide can be provided in the middle of the stand 31.

  Next, as described above, the operator rotates the stand 31 from the storage position b to the use position a and rotates the stand support body 41 around the rotation shaft 42.

  Then, the fixture 43 of the stand support body 41 is inserted into the entrance / exit portion d of the use position fixture 45, but since the diameter of the entrance / exit portion d is larger than the diameter of the stopper s of the fixture 43, the fixture 43 can be easily penetrated into the access portion d.

  Next, the other end portion of the stand support body 41 is raised to the boom 24 side so that the fixing tool 43 is fitted into the holding portion c, and the support member 45a is rotated so as to be in the front-rear direction of the use position fixing portion 45. As shown in FIG. 7C, the holding part c and the entrance / exit part d are screwed into the positions through the hole 47. The stopper s of the fixing tool 43 prevents the fixing tool 43 from being detached from the holding part c.

  As a result, the fixture 43 can be easily fixed to the use position fixing portion 45 by being supported in the holding portion c by the support member 45a without falling into the access portion d. The stand 31 can be securely fixed.

  And an operator can perform the said operation | work easily, without using a tool and a separate detachable locking member. The support member 45 a is not limited to a bolt or the like, and may be a hook provided between the stand support body 41 and the boom 24.

  When the stand 31 is rotated from the use position a to the storage position b, contrary to the above, the support member 45a of the use position fixing part 45 is turned to hold the holding part c in the hole part 4; The blocking of the entrance / exit portion d by the support member 45a is released, and the stand 31 is pulled below the stand 31 against the urging force of the elastic member 37, so that the entrance / exit portion d below the holding portion c in the stand support 41 is provided. The fixing tool 43 moved to is removed from the hole 47 of the use position fixing part 45.

  Then, the stand 31 and the stand support 41 are rotated, and the stand 43 is pulled rearward of the front work machine S against the urging force of the elastic member 37 at the storage position b of the stand 31, thereby fixing the fixture 43. When the operator removes his / her hand from the stand 31 after penetrating the entrance / exit d in the hole 47 of the storage position fixing portion 46, the stand 31 slides toward the front of the front work machine S due to the urging of the elastic member 37. Therefore, as a result of the fixture 43 being slid and fitted into the holding portion c, the stand support body 41 is securely and easily stored and fixed.

  With such a configuration, when the stand support 41 is fixed to the use position fixing part 45 or the storage position fixing part 46 via the fixing tool 43, the fixing tool 43 is inserted into the holes 47 and 48. First, the fixing tool 43 is held in the holes 47 and 48 by easily moving the fixing tool 43 into the entrance / exit d having a diameter larger than the stopper s of the fixing tool 43 and then moving the fixing tool 43. It can be easily fitted to the part c.

  Therefore, when the fixing tool 43 is fitted in the holes 47 and 48 and the stand support 41 is fixed to the use position fixing part 45 or the storage position fixing part 46 via the fixing tool 43, a separate tool is used. It is not necessary, and the operator can easily fit and fix both.

  Further, the above-mentioned stand support body 41 can also fix and support the stand 31 at the use position “a” and the storage position “b” by a rotation shaft provided on the boom 24 side. FIG. 10 is a left side view of the front portion of the front work machine showing a stand support body provided with a rotation shaft on the boom side, and FIG. 11 is a front view of a lock groove provided on the stand side for supporting the stand support body.

  In this case, as shown in FIG. 10, a fixed portion 51 that pivotally supports the rotation shaft 55 of the stand support body 41 is provided at an appropriate position of the lower end portion in the middle portion of the boom 24. Further, the stand support body 41 is configured to be slightly swingable in the left-right direction of the boom 24 with the rotation shaft 55 as a base end.

  Further, the fixing portion 51 can slide the lower end of the boom 24 in the longitudinal direction of the machine body by fitting a convex portion provided on the outer surface of the fixing portion 51 into a groove (not shown) provided inside the boom 24, for example. Formed to be. In addition, the fixing | fixed part 51 is comprised so that it can latch in the appropriate position of the boom 24 lower end with the latching | locking part (configuration is not limited) provided in this fixing | fixed part 51.

  On the other hand, the front end portion of the stand support 41 is fitted into a slide groove 52 formed in the center of the back surface of the stand 31, and the use position a and the storage position b of the stand 31 are within the slide groove 52. 11 at the front end portion of the stand support body 41, which is formed toward the side of the sliding groove 52 (left and right direction of the boom 24) as shown in FIG. A side lock groove 53 and a storage side lock groove 54 are provided. The lock grooves 53 and 54 may be formed on either the left or right side or the left or right side of the sliding groove 52, respectively.

  Here, as described above, for example, when the stand 31 is rotated from the storage position b to the use position a, first, the front end portion of the stand support body 41 fitted in the storage-side lock groove 54 of the stand 31 is first used. Is moved into the sliding groove 52.

  Next, as the stand 31 rotates, the stand support 41 slides the fixing portion 51 toward the front portion of the boom 24, and uses the rotation shaft 42 ′ as the axis to make the front end of the stand support 41. Is slid along the slide groove 52 toward the upper side of the stand 31.

  And in the use position a of the stand 31, the fixing | fixed part 51 is locked to the lower end position of the boom 24 corresponding to this use position a with the said locking member etc., and the front-end part of the stand support body 41 is left or right Since the front end portion of the stand support body 41 is fixed in the use side lock groove 53 by being introduced into the one use side lock groove 53, the stay 31 can be stably supported by the stand support body 41.

  Further, when the stand 31 is rotated from the use position a to the storage position b, the stand support body 41 is slid in the same manner as described above and fixed to the storage side lock groove 54, and the stay 31 is fixed by the stand support body 41. It can be stably supported.

  With such a configuration, the stand support 41 that stably supports the stand 31 is locked, so that no additional tool or locking tool is required, and the operator slides the stand support 41 to support the stand. The body 41 can be easily fixed to the stand 31.

  As described in detail above, the working machine S of this example includes the lift cylinder 26 having one end connected to the hitch 22 of the working machine attached to the vehicle, and the main beam 23 to which the other end of the lift cylinder 26 is attached. A boom 24 that extends from the main beam 23 and has an attachment 25 attached to the tip thereof via an attachment member, and a stand fixing portion 32 of the boom 24, one end of which is pivotally connected by a rotary shaft 33, and the like. The stand 31 is grounded to support the work machine S, and a stand support body 41 that supports the stand 31 is provided in the middle of the stand 31. The stand 31 is connected to the stand 31 via the rotation shaft 33. The positioning member 36 protrudes below the rotation shaft 33 and is slidable in the longitudinal direction of the positioning shaft 31. In the storage position notch portion 35 is fitted, in which and a notch 34 for use position is fitted in the position of use a stand 31.

  In the above-described example, the wheel type tractor has been described as an example of the work vehicle on which the work machine is mounted. However, the present invention is not limited to this, and the work machine such as a crawler type tractor or a construction work vehicle may be used. Any device that can be detachably mounted may be used.

  In addition, the working machine has been described with the front working machine taking the front loader as an example. However, the working machine may be a rear working machine that is attached to the rear part of the machine body, and the attachment uses a fork other than the bucket example. It can be applied to any work machine.

24 Boom 31 Stand 32 Stand fixing portion 33, 42, 42 ′ Rotating shaft 34 Notch portion for use position 35 Notch portion for storage position 36 Positioning member 41 Stand support body 43 Fixing tool 47, 48 Hole portion 45 Fixing portion for use position 46 Storage position fixing part 51 Fixing part 52 Sliding groove 53 Use side lock groove 54 Storage side lock groove a Use position b Storage position c Holding part d Loading / unloading part S (front) Working machine s Stopper

Claims (3)

A lift cylinder having one end connected to a hitch of a work machine attached to the vehicle;
A main beam to which the other end of the lift cylinder is attached;
A boom extending from the main beam and having an attachment attached to the tip via an attachment member;
A stand for supporting the work machine by pivoting one end of the boom to the stand fixing portion and grounding the other end;
In the middle of the stand, a stand support that supports the stand;
In a working machine that is detachably mounted on a vehicle,
The stand is slidable in the longitudinal direction of the stand via the pivot shaft, and a positioning member is provided below the pivot shaft,
The working machine, wherein the stand fixing portion includes a storage position cutout portion for fixing the positioning member at the stand storage position, and a use position cutout portion for fixing at the use position of the stand.   The said rotation axis | shaft rocks | fluctuates within the long hole formed in the said stand by expansion-contraction of the elastic member provided between this rotation axis | shaft and the said positioning member. Work machine.   The storage position fixing portion and the use position fixing portion are provided with a hole portion in which a fixture provided at the other end portion of the stand support body is detachable, and the hole portions have different sizes. The working machine according to claim 1, comprising an access portion and a holding portion.

Images