JP6488804B2 - Outrigger storage lock device - Google Patents

Description

  The present invention relates to an outrigger mounted on a work vehicle such as an in-vehicle crane or an aerial work vehicle. More specifically, the movable portion (inner box and jack portion) of the outrigger is prevented from inadvertently jumping outward during traveling. The present invention relates to a storage lock device for an outrigger.

  When a work vehicle equipped with an outrigger is driven, it is necessary to lock the outrigger in a retracted state, and various storage lock devices have been developed. In addition, as a function of the outrigger storage lock device, it can be moved in the outrigger retracted state in addition to preventing the movable portion of the outrigger (inner box or jack) from popping outward when the outrigger is retracted. There is also a need to prevent the movable part from rattling with respect to the outer box.

  For example, Japanese Patent No. 4073590 (Patent Document 1) discloses a known example that can achieve both functions of preventing the movable part from popping out and preventing the movable part from rattling in the outrigger retracted state. The name of the invention of this patent document 1 is “outrigger backlash prevention device”.

  As shown in FIGS. 5 (A) and 5 (B), this known example (Patent Document 1) has an outrigger backlash prevention device in which an inner box (2) is slidably inserted into an outer box (1). In the outrigger in which the jack portion (3) is attached to the outer end portion of the inner box (2), the abutting portion where the outer case (1) and the jack portion (3) abut in the outrigger retracted state shown in FIG. Attach the elastic stopper (4) to the outer box (2) side (outer end surface of the bracket (11)), and attach the manual lever (5) with cam-type claw (53) to the outer box (1) side. The jack (3) is provided with a receiving seat (6) provided with a groove (55) for engaging the claw (53) of the lever (5). 5A corresponds to FIG. 6 of the publication of Patent Document 1, and FIG. 5B corresponds to FIG. 2 of the publication. 5A and 5B, those described in the gazette of Patent Document 1 are used as they are.

  In the outrigger backlash prevention device of Patent Document 1, first, as shown in FIG. 5 (A), the inner box (2) and the outer box (1) are unlocked with the lever (5) unlocked. When the movable part (2, 3) composed of the jack part (3) is moved inward to the most retracted position, the inner surface of the jack part (3) comes into contact with the elastic stopper (4). From this state, as shown in FIG. 5B, when the lever (5) is tilted to the lock side (right side), the claw (53) of the lever (5) is inserted into the groove (55) of the seat (6). While entering, the jack portion (3) is pulled inward through the seat (6), whereby the elastic stopper (4) is compressed and elastic force is generated in the elastic stopper (4).

  In the outrigger retracted state shown in FIG. 5B, the claw (53) of the lever (5) is engaged with the groove (55) of the seat (6). It is possible to prevent 3) from inadvertently jumping outward, and the elastic stopper (4) is compressed and has elasticity, so that the movable parts (2, 3) are attached to the outer box (1). On the other hand, there is a function that can prevent rattling.

Japanese Patent No. 4073590

  By the way, in the thing of the said patent document 1, after moving a movable part (2,3) inward with respect to an outer case (1) and setting it as the outrigger storing state shown to FIG. To lock 3), it is necessary to tilt the lever (5) to the locked position by manual operation.

  Therefore, in this Patent Document 1, manual locking by the lever (5) is performed after the outrigger retracting operation (inward pushing operation of the movable portion) to prevent the movable portion (2, 3) from rattling. There is a problem that the operation of locking the outrigger is troublesome because operation is necessary, and there is a risk that the movable parts (2, 3) will jump out when driving if you forget to lock the lever (5) was there.

  Therefore, when the outrigger is stored in the present invention, the movable part having the inner box and the jack part is pushed inwardly with respect to the outer box by a single operation. Outrigger storage lock device that can achieve both functions of prevention of popping-out and rattling, and can only reliably lock the movable part even if the inward pushing operation of the movable part is weak. It was made for the purpose of providing.

  The present invention has the following configuration as means for solving the above problems. The present invention is directed to an outrigger storage lock device for preventing the movable portion (inner box and jack portion) of the outrigger from inadvertently jumping outward when the work vehicle is traveling. In addition, although the name of the invention of the present application is “outrigger storage lock device”, in the following description, the name of the invention of the present application may be simply referred to as “storage lock device”.

  The storage lock device of the present invention is equipped with an outrigger that can slide a movable part having an inner box and a jack part between an extended position and a stored position with respect to an outer box. The storage lock device of the present invention has the following configurations.

  An elastic stopper that generates an elastic force by being compressed is provided on one of the contact portions where the movable portion and the outer box abut in the outrigger fully retracted state.

  A base portion of an engaging hook having a claw portion on the front side is pivotally supported on one of the movable portion and the outer box.

  An engagement receiver for engaging the claw portion of the engagement hook with the outrigger fully retracted is provided on either the movable portion or the outer box.

  The engagement hook is biased by a spring toward the side where the claw portion engages with the engagement receiver.

  The tip portion of the engagement hook is configured so that the claw portion can automatically engage with the engagement receiver when the movable portion is retracted to the vicinity of the most retracted position of the outrigger. doing.

  The claw portion of the engaging hook is engaged with the engagement receiving member when the elastic stopper is in the non-compressed state in the outrigger fully retracted state and prevents the movable portion from protruding outward from the outer box. When the outrigger is fully retracted until the elastic stopper is compressed, the engaging claw and the first engaging claw are engaged with the engaging receptacle to prevent the movable portion from rattling against the outer box. A second engaging claw. The first engagement claw is located on the shallow side from the front end of the engagement hook, and the second engagement claw is located on the deep side from the front end of the engagement hook.

  The storage lock device of the present invention functions as follows. In order to store the outrigger employed in the present application from the overhanging state, it is possible to push the inner box inward with respect to the outer box with a jack portion by human power.

  As described above, when the movable part is pushed to the vicinity of the most retracted position by the inward pushing operation (storage operation) of the movable part, the tip of the engagement hook gets over the engagement receiver, and the engagement hook The claw portion (the first engagement claw or the second engagement claw) at the tip portion automatically engages with the engagement receiver. In addition, even if it is in the state where either the first engagement claw or the second engagement claw on the engagement hook side is engaged with the engagement receiver, the engagement hook is moved to the claw portion engagement side by the spring. Therefore, the engagement between the claw portion and the engagement receiver is maintained in a stable state.

  By the way, when the movable part is pushed inward to the most retracted position, the other member (outer box or movable part) comes into contact with the front surface of the elastic stopper provided in the one member (movable part or outer box). become. Then, when the movable portion is pushed inward to the maximum retracted position, if the inward pushing force of the movable portion is weak and the elastic stopper cannot be compressed, the first engagement claw of the engagement hook and the engagement receiving member are pressed. When the inward pushing force of the movable part is strong and the elastic stopper is compressed, the second engaging claw of the engaging hook and the engaging receiver are engaged with each other. become.

  In the state where the first engagement claw of the engagement hook is engaged with the engagement receiver, the elastic stopper is in an uncompressed state (no elastic force is generated), so that there is no space between the movable portion and the outer box. Although there is a slight backlash, there is a function that can prevent the movable part from inadvertently jumping outward. On the other hand, in a state where the second engagement claw of the engagement hook is engaged with the engagement receiver, the elastic stopper is compressed (elasticity is generated), so that there is a gap between the movable portion and the outer box. It has a function that can prevent the rattling from being loosened and prevent the movable part from inadvertently jumping outward.

  Note that the locking state by the engagement hook can be released by manually operating a lock release lever, for example.

  The outrigger storage lock device of the present invention is an outrigger in which the movable part is slid between the extended position and the storage position with respect to the outer box. An engaging hook claw (first engaging claw) attached to one member (for example, the movable portion) by having a joint and a spring and pushing the movable portion to the most retracted position with respect to the outer box. Alternatively, the second engagement claw) and the engagement receiving member attached to the other member (for example, the outer box) are automatically engaged to maintain the outrigger in the locked state.

  Therefore, in the storage lock device of the present invention, since the outrigger can be automatically locked only by a single operation of pushing the movable portion inwardly with respect to the outer box, the outrigger can be stored easily and securely. There is an effect that can be done. That is, as in Patent Document 1, the present invention reduces the number of lock operation work steps and causes trouble due to forgetting to lock, compared to the one in which the outrigger is pushed to the most retracted position and then locked by a manual lever. Can solve the problem.

  Further, in the storage lock device of the present invention, the elastic stopper generates an elastic force in the most retracted state of the outrigger so that the play between the movable part and the outer box can be prevented. The generation of the force can be automatically achieved simply by pressing the movable part strongly against the outer box, so that there is also an effect that the operation for preventing the movable part from rattling with respect to the outer box is simple.

It is a partial side view of the outrigger which employ | adopted the storage lock apparatus of this-application Example. It is function explanatory drawing of the storage lock apparatus of FIG. It is explanatory drawing of the 1st usage pattern in the storage lock apparatus of FIG. It is explanatory drawing of the 2nd usage pattern in the storage lock apparatus of FIG. It is an outrigger storage lock apparatus of a prior art example, Comprising: (A) is the state before a lock | rock, (B) is the state after a lock | rock.

  Hereinafter, an embodiment of the present application will be described with reference to FIGS. 1 to 4. An outrigger storage lock device of this embodiment is an outrigger 1 when traveling in a work vehicle with an outrigger such as a vehicle-mounted crane or an aerial work vehicle. The movable part 3 is prevented from inadvertently jumping outward.

  Although FIG. 1 shows the vicinity of one jack portion of the outrigger 1, the outrigger 1 is movable with an inner box 31 and a jack portion 32 with respect to an outer box 2 fixed to a vehicle frame (not shown). The part 3 can be slid between the extended position and the retracted position. Further, the outrigger 1 used in this embodiment is such that the movable part 3 (the inner box 31 and the jack part 32) is manually slid with respect to the outer box 2.

  The jack portion 32 is attached to the outer end portion of the inner box 31 in a vertical orientation. And the connection part with the inner box 31 in this jack part 32 is using the case body 33 of the rectangular cylinder shape.

  In this embodiment, the storage lock device employed in the outrigger 1 includes an engagement hook 4 provided on the movable portion 3 (jack portion 32), an engagement receiver 5 provided on the outer box 2, and an outer box. The elastic stopper 6 is provided on the second side, and a spring 7 that biases a claw portion 40 (described later) of the engagement hook 4 toward the engagement side. In this embodiment, the engagement hook 4 is provided on the movable portion 3 and the engagement receiver 5 is provided on the outer box 2. However, in other embodiments, the engagement hook 4 and the engagement receiver 5 are provided. May be provided on the opposite member. The elastic stopper 6 may also be provided on the movable part 3 side in other embodiments.

  In this embodiment, the engagement receiver 5 is a short round bar, and the round bar 5 is mounted in a horizontal front and rear posture at a position near the lower part of the outer edge of the outer box 2. It is. The engagement receiver (round bar) 5 is attached to the side surface of the bracket 5 extended outward from the outer end edge of the outer box 2 in a lateral posture.

  The engagement hook 4 is a slightly horizontally long plate-like body, and a claw portion 40 described later is formed on the tip portion 4b side. And this engagement hook 4 has the base part 4a on the side surface of the case body 33 of the jack part 32 with the horizontal support axis | shaft 11 in the horizontal attitude | position which the front part 4b side faces inward (engagement receiving tool 5 side). It is pivotally supported. Further, the engagement hook 4 is common to the support 35 in which the base portion 4 a of the engagement hook 4 and the holder 12 are fixed to the side surface of the case body 33 in a state where the base portion 4 a is held in the holder 12. It is pivotally supported by the support shaft 11. The installation height of the support shaft 11 is substantially the same as the installation height of the engagement receiving member (round bar) 5.

  The engagement hook 4 can swing up and down with respect to the holder 12 with respect to the holder 12 while the front portion 4b side is pivoted about the pivotal support portion (support shaft 11) of the base portion 4a. The tip 4b side is biased to the side that swings downward. The engagement hook 4 has a substantially horizontal posture as shown in FIGS. 1 and 2 and the bottom surface near the base 4a abuts on a lateral locking stopper 14 provided in the holder 12, and the engagement hook 4 The hook 4 is prevented from further swinging downward with respect to the holder 12 on the front end 4b side.

  A lever 13 extending upward is attached to the holder 12, and the lever 13 is tilted leftward (in the direction of the arrow) as shown by reference numeral 13 'in FIG. 4 can be rotated in the counterclockwise direction about the support shaft 11. Then, as will be described later (FIGS. 3 and 4), when the engagement hook 4 is in the locked state, the lever 13 is tilted leftward as indicated by reference numeral 13 'in FIG. Can be in the unlocked state as indicated by reference numeral 4 ″, and the movable part 3 can be slid to the overhanging side while maintaining the unlocked state.

  The elastic stopper 6 is made of a material that generates a resilient force when compressed (for example, elastic rubber), is formed in a block shape having an appropriate thickness, and is provided on the lower surface near the outer end of the outer box 2. It is attached to the outer surface of the mounting base 61.

  When the movable portion 3 slides inward to the outrigger retracted position, the inner side surface 33a of the case body 33 of the jack portion 32 approaches (or substantially contacts) the outer surface of the elastic stopper 6 as shown in FIG. Alternatively, as shown in FIG. 4, the elastic stopper 6 can be compressed by a predetermined thickness on the inner side surface 33 a of the case body 33 of the jack portion 32.

  A claw portion 40 that engages with the engagement receiver 5 is provided at the tip portion 4 b of the engagement hook 4, and this claw portion 40 is located above the lower surface position of the tip portion 4 b of the engagement hook 4. It is formed in a recessed shape. The claw portion 40 includes a first engagement claw 41 located on the lower side and a front side (inward side), and an upper side of the first engagement claw 41 continuously to the first engagement claw 41. And a second engaging claw 42 located on the back side (outside side). The first engagement claw 41 and the second engagement claw 42 have arc shapes that are the same shape and size as the outer surface shape of the engagement receiver 5.

  The second engagement claw 42 of the claw portion 40 is positioned at the same height as the engagement receiver 5 in the natural state where the engagement hook 4 is urged by the spring 7 as shown in FIG. In addition, since the 1st engagement nail | claw 41 of the nail | claw part 40 is a position below the 2nd engagement nail | claw 42, naturally it is located below the installation height of the engagement receiver 5. FIG.

  When the first engagement claw 41 of the claw portion 40 is engaged with the engagement receiver 5 in the outrigger fully retracted state, the inner side surface 33a of the case body 33 of the jack portion 3 is elastic as shown in FIG. It is close to the outer surface of the stopper 6 with a slight gap S (or may be lightly in contact), and the elastic stopper 6 is in an uncompressed state. Therefore, in this state, no elastic force is generated in the elastic stopper 6. On the other hand, in a state where the first engagement claw 42 of the claw portion 40 is engaged with the engagement receiver 5, as shown in FIG. 4, the inner side surface 33a of the case body 33 of the jack portion 3 sets the elastic stopper 6 to a predetermined width ( Only the code T) is compressed. Accordingly, in this state, a resilient force is generated in the elastic stopper 6.

  A cam surface 43 is provided on the tip surface of the tip portion 4b of the engagement hook 4 so as to be inclined inwardly. As shown in FIG. 2, the cam surface (inclined surface) 43 is formed so that the front side of the engagement hook 4 extends along the cam surface when the movable portion 3 is slid inward and pressed against the engagement receiver 5. Thus, it automatically lifts upward (reference numeral 4 'in FIG. 2) so that the front side of the engagement hook 4 can smoothly get over the engagement receiver (reference numeral 5').

  The outrigger storage lock device of this embodiment functions as follows.

  First, in order to store the outrigger 1 from the extended state, the movable part 3 (the inner box 31 and the jack part 32) is pushed inward with respect to the outer box 2 by human power. When pushed to near the position, as shown in FIG. 2, the cam surface 43 of the tip portion 4 b of the engagement hook 4 comes into contact with the engagement receiver 5, and then the cam surface (inclined surface) 43 causes the engagement hook 4 to move. The front part 4b automatically gets over the engagement receiver 5 (state 4 '), and subsequently, as shown in FIG. 3 or 4, the claw part 40 (first first part) on the front part 4b of the engagement hook 4 The engagement claw 41 or the second engagement claw 42) automatically engages with the engagement receiver 5. At this time, regardless of which of the first engagement claw 41 or the second engagement claw 4 on the engagement hook 4 side is engaged with the engagement receiver 5, the engagement hook 4 is not spring-loaded. 7, the engagement between the claw 40 and the engagement receiver 5 is maintained in a stable state.

  By the way, when the movable part 3 is pushed inward to the most retracted position, a part of the movable part 3 (the case body 33 of the jack part) comes into contact with the elastic stopper 6 on the outer box 2 side. Then, when the movable portion 3 is pushed inward to the most retracted position, if the inward pushing force of the movable portion 3 is weak and the elastic stopper 6 cannot be compressed, as shown in FIG. When one engaging claw 41 engages with the engagement receiving member 5 and the inward pushing force of the movable portion 3 is strong and the elastic stopper is compressed, as shown in FIG. The two engagement claws 42 are engaged with the engagement receiver 5.

  As shown in FIG. 3, in a state where the first engagement claw 41 of the engagement hook 4 is engaged with the engagement receiver 5, the elastic stopper 6 is in an uncompressed state. Although there is a slight backlash between the case body 33) of the portion 32 and the outer box 2, the engagement hook 4 is biased toward the claw portion engagement side by the spring 7 (the lock is maintained). There is a function that can prevent the movable part 3 from inadvertently jumping outward. On the other hand, as shown in FIG. 4, in a state where the second engagement claw 42 of the engagement hook 4 is engaged with the engagement receiver 5, the elastic stopper 6 is compressed (elasticity is generated). Therefore, the play between the movable part 3 (the case body 33 of the jack part 32) and the outer box 2 can be prevented, and the movable part 3 can be prevented from inadvertently jumping outward.

  Therefore, in the storage lock device of this embodiment, the outrigger 1 can be automatically locked only by a single operation of pushing the movable part 3 inward with respect to the outer box 2, so that the storage operation of the outrigger 1 is simple. And can be locked securely. That is, as in Patent Document 1, the present invention reduces the number of lock operation work steps and causes trouble due to forgetting to lock, compared to the one in which the outrigger is pushed to the most retracted position and then locked by a manual lever. Can solve the problem.

  Further, in the storage lock device of this embodiment, the elastic stopper 6 is caused to generate elastic force in the most retracted state of the outrigger 1, thereby preventing play between the movable portion 3 and the outer box 2. In order to generate the elastic force of the elastic stopper 6, the elastic stopper 6 can be automatically achieved by simply pushing the movable part 3 strongly against the outer box 2, so that play between the movable part 3 and the outer box 2 can be prevented. Easy to operate.

  1 is an outrigger, 2 is an outer case, 3 is a movable part, 4 is an engagement hook, 4a is a base part, 4b is a front part, 5 is an engagement receiver, 6 is an elastic stopper, 7 is a spring, 11 is a support shaft, Reference numeral 31 denotes an inner box, 32 denotes a jack portion, 33 denotes a case body, 40 denotes a claw portion, 41 denotes a first engagement claw, 42 denotes a second engagement claw, and 43 denotes a cam surface.

Claims (1)

In the outrigger that can slide the movable part having the inner box and the jack part with respect to the outer box between the extended position and the storage position,
An elastic stopper is provided that generates an elastic force by being compressed to one of the abutting portions where the movable portion and the outer box abut in the outrigger most retracted state,
A base portion of an engagement hook having a claw portion on the front side of either the movable portion or the outer box is pivotally supported,
An engagement receiver for engaging the claw portion of the engagement hook in the most retracted state of the outrigger is provided on either the movable portion or the outer box,
The engagement hook is biased by a spring toward the side where the claw portion engages with the engagement receiver,
The tip portion of the engagement hook is configured so that the claw portion can automatically engage with the engagement receiver when the movable portion is retracted to the vicinity of the most retracted position of the outrigger. As well as
The claw portion of the engagement hook is engaged with the engagement receiving member when the elastic stopper is in an uncompressed state with the outrigger fully retracted to prevent the movable portion from popping out of the outer box. A first engaging claw that is engaged with the engagement receiving member when the outrigger is retracted until the elastic stopper is compressed. A second engaging claw for preventing play of the movable part;
An outrigger storage lock device characterized by the above.

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