JP2015009918A - Jack operation restriction device for outrigger device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make the operation of jack operation lever for extending and contracting jacks physically impossible when lock pins for slide locking are in lock release positions, in an outrigger device which has lock pin operation levers for operating the lock pins and the jack operation levers.SOLUTION: A jack operation restriction device for an outrigger device includes slide beams 2 comprised of outer cylinders 21 and inner cylinders 22, jacks 3 provided at the tips of inner boxes, lock pins 4 that make the sliding of the inner cylinders impossible, lock pin operation levers 5 that actuate the lock pins, and jack operation levers 6 that extend and contract the jacks. Between the jack operation lever 6 and the lock pin control lever 5, there is provided a jack operation lever locking means 7 which makes the operation of the jack operation lever physically impossible only when the lock pin control lever is in a state where the lock pin is actuated to the lock release position. This makes the operation of the jack operation lever impossible when the lock pin is in the lock release position.

Description

  The present invention relates to an outrigger apparatus having a slide beam and a jack composed of an outer cylinder and an inner cylinder, and the jack in the outrigger apparatus in which the extension operation of the jack cannot be performed when the inner cylinder of the slide beam is not slide-locked. The present invention relates to an operation restriction device.

  In an outrigger device having a slide beam and a jack, it is necessary to lock the inner cylinder of the slide beam so as not to slide with respect to the outer cylinder when the jack is extended. That is, if the jack is extended (jacked up) in a state where the inner cylinder is not slide-locked, it is dangerous because the inner cylinder may inadvertently slide relative to the outer cylinder. In particular, when carrying out crane work in the jack-up state, it is extremely dangerous if the inner cylinder of the slide beam slides carelessly.

  The slide lock of the inner cylinder is performed by inserting a lock pin into each pin insertion hole of the outer cylinder and the inner cylinder. This lock pin insertion operation is generally a manual operation by a lock pin operating lever. Is going on.

  However, in this manual lock pin insertion operation, the lock pin insertion operation may be forgotten, and if the jack extension operation is performed without forgetting to slide lock the inner cylinder, the inner cylinder is removed from the outer cylinder as described above. There is a danger of sliding inadvertently.

  By the way, when the slide lock state of the inner cylinder is electrically detected by the detector and the detector does not detect the slide lock state of the inner cylinder, the jack extension operation is not performed even if the jack extension operation is performed by the jack operation lever. It is easy to think about how to prevent it from being executed. In addition, as what controls a jack extension | expansion operation | movement electrically, for example, as disclosed by patent document 1 (Japanese Utility Model Publication No. 2-48284), a jack is displaced to a horizontal position and a vertical position (use position). , The detector detects that the jack is in a vertical position, and the jack can be extended only when a detection signal is emitted from the detector.

Japanese Utility Model Publication No. 2-48284

  However, in the case of controlling the jack extension operation by electrically detecting the slide lock state of the inner cylinder as described above, the structure becomes complicated and the cost is increased, and the detector is broken, broken or shorted. It is also considered that malfunction may occur due to the above, and it is also necessary to design such that it can be repaired in case of failure.

  Accordingly, the present invention provides an outrigger device having a lock pin operating lever for operating a lock pin for sliding lock of an inner cylinder and a jack operating lever for extending and retracting the jack. When the lock pin is in the unlocked position, the jack It is an object of the present invention to provide a jack operation restriction device that prevents the operation of the jack operation lever from being physically performed by causing the operation lever and the lock pin operation lever to interfere with each other.

  The present invention has the following configuration as means for solving the above problems.

  The present invention includes a slide beam composed of an outer box and an inner box, a jack provided at the tip of the inner box, a lock pin that makes the inner box non-slidable with respect to the outer box, and a lock pin that is locked and unlocked. It is intended for an outrigger device having a lock pin operating lever that is actuated and a jack operating lever that expands and contracts the jack. The outrigger device used in the present application supports a part or the whole of a vehicle body such as a crane truck or an aerial work vehicle in a state where it floats from the ground.

  By the way, even in the outrigger device which is the subject of the present invention, the jack extension operation can be caused by operating the jack operation lever to the jack extension side. If the jack is extended (jacked up) in a state where the slide is not locked, there is a risk that the inner cylinder may slide carelessly with respect to the outer cylinder.

  Therefore, in the present invention, the outrigger device includes a jack operation restriction device for preventing the jack from being extended in a state where the inner cylinder is not slide-locked with respect to the outer cylinder.

  In other words, the jack operation restriction device of the present invention physically operates the jack operation lever between the jack operation lever and the lock pin operation lever only when the lock pin operation lever operates the lock pin to the unlock position. It is characterized by providing a jack operation lever locking means which makes it impossible.

  By the way, the jack operation lever locking means used in the present application is interposed between the jack operation lever and the lock pin operation lever, and the lock pin operation lever operates the lock pin to the unlock position. Although an appropriate configuration can be adopted as long as the operation of the jack operation lever can be physically disabled only in the state, those shown in the following embodiments can be used as an example.

  In the jack operation restriction device of the present invention, in the state where the lock pin operation lever operates the lock pin to the unlock position, the jack operation lever lock means disables the operation of the jack operation lever. Even if the jack operating lever is operated in a state where the inner cylinder is not slide-locked, the jack operating lever does not operate (the jack cannot be extended or contracted).

  In the state where the lock pin operating lever operates the lock pin in the locked position, the jack operating lever locking means does not restrain the jack operating lever at all, so the jack operating lever can be operated (the jack is extended and retracted). Can be made).

  The jack operation restriction device according to the present invention is a jack operation lever lock provided between the jack operation lever and the lock pin operation lever in a state where the lock pin operation lever operates the lock pin to the unlock position as described above. Since the operation of the jack operating lever is physically disabled by the means, the following effects are obtained.

  In other words, the jack operation restriction device of the present invention has an effect that even if the lock pin is forgotten to be locked, a dangerous operation (jack extension operation) can be prevented in advance, and the jack operation lever lock means is a physical interlock. Therefore, there are an effect that the operation of the jack can be surely restricted, an effect that the failure is less than that of the electrically controlled device, and an effect that the device can be manufactured simply and inexpensively.

1 is an overall view of an outrigger device employing a jack operation restriction device according to an embodiment of the present application. It is the II section enlarged view of Drawing 1, and is a perspective view in the state where the lock pin operation lever was located in the lock position. FIG. 3 is a cross-sectional view of a lock pin portion in a state where a lock pin operation lever shown in FIG. 2 is positioned at a lock position. FIG. 3 is a perspective view in a state where a lock pin operation lever is positioned at a lock release position from the state of FIG. 2. It is sectional drawing of the lock pin part in the state which has located the lock pin operation lever shown in FIG. 4 in the lock release position.

  Hereinafter, with reference to FIGS. 1-5, the jack operation restriction apparatus in the outrigger apparatus of this embodiment is demonstrated.

  1 to 5 show an outrigger device 1 mounted on a small truck. This outrigger device 1 is mainly installed between a front end portion of a truck bed and a rear surface of a cabin, and It is used to float the front side (support the vehicle in an inclined state).

  A crane device 10 is mounted on the upper part of the outrigger device 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.

  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, and an outrigger slide operation lever are provided on the upper part of the outrigger device 1. 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 outrigger device 1 includes a pair of left and right slide beams 2, 2 including an outer cylinder 21 and an inner cylinder 22, a pair of left and right jacks 3, 3 provided at the distal ends of the inner cylinders 22, 22, and an inner cylinder 22. A lock pin 4 (see FIGS. 3 and 5) that cannot slide relative to the outer cylinder 21, and a lock pin operating lever that operates the lock pin 4 to a locked position (FIG. 3) and an unlocked position (FIG. 5). 5 and a jack operating lever 6 for expanding and contracting the jack 3.

  The slide operation of the inner cylinders 22, 22 of the slide beams 2, 2 is generally performed by a slide cylinder (not shown), but a slide operation by human power is also applicable. In the outrigger device 1 of this embodiment, the inner cylinders 22 and 22 can be slid in two stages (three positions). That is, as shown in FIG. 1, the jack 3 provided at the tip of each of the inner cylinders 22 and 22 has a storage position indicated by a solid line, an intermediate protruding position indicated by reference numeral 3 ', and a maximum indicated by reference numeral 3 ". It can be moved to the overhang position.

  The outer cylinder 21 and the inner cylinder 22 of each of the slide beams 2 and 2 are a jack storage position indicated by reference numeral 3 in FIG. 1, a jack intermediate extension position indicated by reference numeral 3 ', and a maximum jack extension indicated by reference numeral 3 ". 3, each can be locked in a non-slidable manner by the lock pin 4 as shown in Fig. 3. That is, one pin hole is provided at one position on the bottom plate near the outer end of the outer cylinder 21. 23, while the jack on the bottom plate of the inner cylinder 22 is overlapped with the pin hole 23 on the outer cylinder side in the state where the jack is positioned at the three slide positions (3, 3 ′, 3 ″). By providing pin holes 24 (in three places) on the inner cylinder side, as shown in FIG. 3, by inserting the lock pin 4 into both pin holes 23 and 24 overlapping from the lower surface side of the outer cylinder 22, Lock the inner cylinder 22 at each slide position It has become get way. One lock pin 4 is used for each of the left and right slide beams 2 and 2.

  The lock pins 4 on each side can be operated to the lock position shown in FIG. 3 and the lock release position shown in FIG. 5 by the lock pin operating levers 5 and 5 (FIG. 1), respectively. Each of the lock pin operating levers 5 and 5 pivots the tip 51a of the rod 51 to the lower end of the lock pin 4 as shown in FIG. 3, while the rod 51 as shown in FIGS. The intermediate portion is guided by a guide member 52.

  The guide member 52 is formed with a guide groove 53 that restricts the movement of the rod 51 of the lock pin operating lever 5. The guide groove 53 includes a vertical groove 53 a that guides the rod 51 up and down and the vertical groove 53 a. And a lateral groove 53b continuous to the upper end of the.

  On the other hand, the lock pin operating lever 5 abuts the upper surface of the rod 51 positioned between the guide member 52 and the lock pin 4 with the lower end of the protruding member 54 provided in a downward protruding state on the lower surface of the outer cylinder 21. ing. The projecting member 54 serves as a fulcrum when the lock pin operating lever 5 is swung up and down.

  The lock pin operating lever 5 has the lower end of the protruding member 54 as a fulcrum as shown in FIG. 3 when the rod 51 is positioned at the lower end of the longitudinal groove 53a of the guide groove 53 as shown in FIG. As shown in FIG. 4, the rod tip 51a moves upward to maintain the lock pin 4 in the locked position, while the lock pin operating lever 5 (grip 51b) is lifted upward from the locked state shown in FIGS. When operated to the arrow A side, as shown in FIG. 5, the rod tip 51a is moved downward with the lower end of the protruding member 54 as a fulcrum, and the lock pin 4 is unlocked (the tip of the lock pin 4 is the inner cylinder 22). The pin hole 24 is pulled out downward). When the rod 51 of the lock pin operating lever 5 is lifted up to the upper end of the longitudinal groove 53a of the guide groove 53 and then the rod 51 is advanced toward the lateral groove 53b, the rod 51 is moved as shown in FIGS. Since the position is held within the vertical width of the lateral groove 53b, the rod 51 cannot be swung up and down. Therefore, when the rod 51 enters the lateral groove 53b of the guide groove 53, the lock pin 4 is maintained at the unlock position as shown in FIG.

  As shown in FIGS. 4 and 5, when the rod 51 of the lock pin operating lever 5 is inserted into the lateral groove 53b of the guide groove 53, in order to install the jack operating lever locking means 7 described later, The rod 51 on the operation lever 5 side is positioned immediately below and relatively close to the rod 61 on the jack operation lever 6 side.

  Each of the jacks 3 and 3 is configured such that an inner body (an inner cylinder including the float 32 in FIG. 1) can be vertically expanded and contracted with respect to an outer body (outer cylinder) 31 by a jack cylinder (not shown). The jacks 3 and 3 can be operated to extend and retract the left and right jacks 3 and 3 at the same time by operating the jack operating lever 6 (rod 61) up and down to operate the jack cylinder expansion and contraction valve. It has become. A pair of the jack operating levers 6 are provided on the left and right sides of the vehicle, and are connected by links 62 so that the jack can be extended and retracted by operating either the left or right jack operating levers 6 and 6. ing. 1 to 5, the jack operating lever 6 is in the neutral position. When the grip 61a of the rod 61 is lifted upward from the neutral position, the jacks 3 and 3 are operated to the reduction side. On the other hand, when the grip 61a is pushed down, the jacks 3 and 3 are operated to the extension side.

  By the way, in the outrigger device 1 of this embodiment, the jacks 3 and 3 can be extended by operating the jack operating lever 6 downward, but the inner cylinder 22 of the slide beam 2 is the outer cylinder 21. If the jack 3 is extended in a state in which it is not slide-locked (unlocked state in FIG. 5), the inner cylinder 22 may inadvertently slide relative to the outer cylinder 21 after the jack is grounded, which is dangerous. .

  Therefore, in this embodiment, in the above-described outrigger device 1, the jack extension operation cannot be performed when the inner cylinder 22 is not slide-locked with respect to the outer cylinder 21 (the unlocked state in FIG. 5). A jack operation restriction device is provided.

  That is, in the jack operation limiting device of this embodiment, the lock pin operation lever 5 operates the lock pin 4 to the unlock position (FIGS. 4 and 5) between the jack operation lever 6 and the lock pin operation lever 5. The jack operation lever lock means 7 is provided so as to physically disable the operation of the jack operation lever 6 only when the jack operation lever 6 is in the closed state.

  As shown in FIGS. 2 to 5, the jack operating lever locking means 7 used in this embodiment is provided with a vertical locking plate 71 having a predetermined length (for example, a length of about 10 to 15 cm). I use it. The locking plate 71 is suspended downward with its upper portion fixed to the rod 61 of the jack operating lever 6. Further, a locking recess 72 having a lateral opening is formed at a position near the lower portion of the locking plate 71 so that the rod 51 of the lock pin operating lever 5 can be freely inserted and removed from the horizontal direction.

  As shown in FIGS. 2 and 3, the jack operating lever locking means 7 (locking plate 71) is configured such that the jack operating lever 6 operates in the neutral position and the lock pin operating lever 5 operates the lock pin 4 in the locked position. In the closed state (slide lock state), the rod 51 of the lock pin operating lever 5 has entered the lower end portion of the longitudinal groove 53a of the guide groove 53, and the rod 51 of the lock pin operating lever 5 is the locking plate. It is located below the outside of the locking recess 72 of 71. 2 and 3, the lock pin operating lever 5 and the jack operating lever 6 can be independently operated without interfering with each other.

  On the other hand, from the slide lock state shown in FIG. 2 and FIG. 3, the lock pin operating lever 5 is operated to the unlock side, that is, the rod 51 of the lock pin operating lever is moved upward from the position of the reference numeral 51 'shown in FIG. When (arrow A) and lateral movement (arrow B) are performed, the rod 51 of the lock pin operating lever 5 is automatically engaged in the locking recess 72 of the locking plate 71.

  4 and 5, the rod 51 of the lock pin operation lever 5 has entered the lateral groove 53b of the guide groove 53, so that the rod 51 of the lock pin operation lever 5 cannot swing up and down. Therefore, the rod 61 of the jack operation lever 6 cannot be swung up and down via the locking plate 71.

  Therefore, in the state where the inner cylinder 22 shown in FIGS. 4 and 5 is in the unlocked state, the jack operating lever 6 is also inoperable via the lock pin operating lever 5 and the locking plate 71 which cannot swing up and down (up and down). Therefore, when the inner cylinder 22 is in the unlocked state, the jack operating lever 5 does not move even if the jack operating lever 6 is operated by mistake (the jack 3 cannot be extended or contracted).

  As described above, in the jack operation restriction device of this embodiment, even if the lock pin 4 is forgotten to be locked, dangerous operation (extension operation of the jack 3) can be prevented in advance and reliably, and the jack operation restriction device can be There is an effect that it can be manufactured simply and inexpensively.

  When the lock pin operation lever 5 is operated to the slide lock position shown in FIGS. 2 and 3 from the inoperable state of the jack operation lever 6 shown in FIGS. 4 and 5, the lock pin 4 is locked and the jack Since the restraint of the operating lever 6 is released, the jack 3 can be safely extended and contracted by operating the jack operating lever 6.

  1 is an outrigger device, 2 is a slide beam, 3 is a jack, 4 is a lock pin, 5 is a lock pin operating lever, 6 is a jack operating lever, 7 is a jack operating lever locking means, 21 is an outer cylinder, 22 is an inner cylinder, 23 is an outer cylinder side pin hole, 24 is an inner cylinder side pin hole, 51 is a lock pin operating lever rod, 52 is a guide member, 53 is a guide groove, 61 is a jack operating lever rod, and 71 is a jack operating lever locking means. The locking plate 72 is a locking recess.

Claims (1)

A slide beam comprising an outer box and an inner box; a jack provided at the tip of the inner box; a lock pin that prevents the inner box from sliding relative to the outer box; and the lock pin in a locked position and an unlocked position. In an outrigger device having a lock pin operating lever that is actuated and a jack operating lever that expands and contracts the jack,
A jack between the jack operating lever and the lock pin operating lever that physically disables the operation of the jack operating lever only when the lock pin operating lever operates the lock pin to the unlocked position. Operation lever locking means is provided,
A jack operation limiting device in an outrigger device characterized by the above.

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