JP2007161397A - Bucket link with hook storage part - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To easily fix a hook stored in a hook storage part without looseness, in a bucket link with the hook storage part provided with the hook storage part for storing the hook for cargo hanging work. <P>SOLUTION: A fixing device 27 for fixing the hook 11 comprises a hook stopper part formed in a stopper body 29 fixed to the bucket link 15; a press body 30 sandwiching and fixing a hook part 26 of the hook 11 between the hook stopper part and the press body 30 by pressing the hook part 26 against the hook stopper part; and a clamp mechanism part 31 for displacing the press body 30 between a separation position separated from the hook part 26 and a pressing position pressing the hook part 26. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention belongs to the technical field of a bucket link with a hook storage portion in which a hook storage portion for storing a hook for hanging work is provided on a bucket link connecting a bucket and a bucket cylinder.

In general, there is a construction machine that performs excavation work and transportation work such as a hydraulic excavator and has a crane function to perform a relatively light suspended work. This is provided with a hook for suspending a suspended load. When performing other work other than the suspended work, the hook is prevented from interfering with other work and the hook is protected. Therefore, a bucket link with a hook storage portion in which a hook storage portion for storing a hook when not in use is provided on a bucket link that connects the bucket and the bucket cylinder is conventionally known.
By the way, it is necessary to fix the hook stored in the hook storage part of the bucket link so that it does not jump out or rattle during other work, and conventionally, it is fixed by being inserted into the hook inner diameter side of the hook. The hook is fixed using a pin and a retaining pin for retaining the fixing pin (see, for example, Patent Document 1).
However, this requires a work of inserting / removing a fixing pin or a retaining pin, which is troublesome and inferior in workability. In addition, such fixing with fixing pins cannot prevent the rattling of the hooks, which may cause noise and hook damage.
On the other hand, a latch member that can be advanced and retracted is provided at the advance position for fixing the stored hook and the retracted position that allows the hook to move, and the latch member automatically moves as the hook is stored in the hook storage portion. A technique has been proposed in which the hook is fixed by being displaced from the exit position to the advance position (see, for example, Patent Document 2). In this case, since the above-described fixing / removing operation of the fixing pin and the retaining pin is not required, improvement in workability can be expected.
JP 2000-95475 A Japanese Patent Laid-Open No. 2001-226078

However, in the thing of the said patent document 2, although a hook will be fixed between the obstruction board and latch member which form a bucket link, in this case, the dimension between an obstruction board and a latch member is set. If the hook thickness is not set with a margin, the latch member may not move smoothly. For this reason, the dimension is set with a margin. However, a gap is generated between the hook and the latch member or between the hook and the closing plate, and the hook becomes loose. Similar to the case of fixing with the fixed pin, there is a problem that the rattling of the hook cannot be prevented.
Moreover, in this thing, a hook is accommodated with the attitude | position which the hook hook part stands with respect to the obstruction board which connects the right and left link side plates which form a bucket link. For this reason, in order to store the hook in the hook storage portion of the bucket link, it is necessary to set the height dimension of the left and right link side plates to be equal to or higher than the height of the collar portion stored in the standing posture, There is a problem that the size of the link side plate must be increased, and the weight becomes heavier.

The present invention has been made in view of the above circumstances and has been created for the purpose of solving these problems, and the invention of claim 1 is provided with a bucket link that connects a bucket and a bucket cylinder. In a bucket link with a hook storage portion provided with a hook storage portion for storing a hook for use, a fixing device for fixing the hook stored in the hook storage portion is provided on the bucket link. A stopper fixed to the hook, a pressing body that clamps and fixes the hook between the stopper by pressing the hook of the hook against the stopper, and a separation position and a hook that separates the pressing body from the hook. A clamp mechanism that is displaced to a pressing position to be pressed, and at least one of the stopper and the pressing body is formed using an elastic material. It is a bucket link with hook-receiving portion and said.
And by doing in this way, the hook stored in the hook storage part is securely fixed by sandwiching and fixing the collar part between the pressing body and the stopper, in this case, At least one of the stopper and the pressing body is formed by using an elastic material, and thus, when performing an operation such as excavation, the hook does not rattle, and noise caused by rattling. And damage to the hook can be reliably prevented.
According to a second aspect of the present invention, the crank mechanism is provided with a clamp base fixed to the bucket link, a pressing body provided on the distal end side, and a proximal end side swingable on the clamp base via a first support shaft. A clamp lever to be supported, a handle portion provided on the distal end side, a proximal end side pivotably connected to an intermediate portion of the clamp lever via a second support shaft, and one end side of the clamp handle A clamp link is pivotally connected to the intermediate portion via a third support shaft, and the other end is supported by the clamp base so as to be swingable via a fourth support shaft, and the clamp handle is released. 2. The bucket with hook storage portion according to claim 1, wherein the pressing body is displaced to a separation position and a pressing position by swinging of a clamp lever linked to swinging operation to a position and a lock position. It is a link.
In this way, the pressing body can be displaced between the separation position and the pressing position with a simple operation of simply swinging the clamp handle, and thus the hook fixing work and the fixing release. The work can be performed easily and in a short time, which can greatly contribute to the improvement of workability.
The invention according to claim 3 is characterized in that, at the pressing position of the pressing body, the reaction force acting on the clamp lever from the stopper or the pressing body acts in a direction to hold the clamp handle in the lock position. The bucket link with a hook storage part according to 2.
And by doing in this way, a clamp handle can be reliably hold | maintained in a locked position, ie, a hook can be fixed reliably, and it can be set as a highly reliable fixing device.
According to a fourth aspect of the present invention, the third support shaft that connects the clamp link to the clamp handle clamps the clamp handle when the clamp handle that displaces the pressing body from the separated position to the pressed position is swung from the release position to the lock position. The clamp link moves from one side of the straight line connecting the second support shaft connected to the lever and the fourth support shaft supporting the clamp link to the clamp base, and the clamp link is moved to the other side. In a state where the third support shaft is located on the other side of the straight line, the reaction force acting on the clamp lever from the stopper or the pressing body acts in the direction to hold the clamp handle in the lock position. It is a bucket link with a hook storage part of Claim 3 characterized by these.
And by doing in this way, when a press body is a press position, it can comprise so that the reaction force which acts on a clamp lever from a stopper or a press body may act in the direction holding a clamp handle in a lock position. .
According to the invention of claim 5, the lever stopper portion that the clamp lever contacts in a pressing state when the clamp handle is in the locked position is formed using an elastic material, and the reaction force that acts on the clamp lever from the lever stopper portion is: The bucket link with a hook storage portion according to any one of claims 2 to 4, wherein the bucket handle is configured to act in a direction in which the clamp handle is held in a locked position.
By doing this, even if the load is being handled, that is, when the hook is not fixed by the fixing device, if the clamp handle is in the locked position, the reaction force that acts on the clamp lever from the lever stopper As a result, the clamp handle can be held in the locked position, so that it is possible to reliably avoid the possibility of the fixing device being damaged or hindering the work during the hanging work.
The invention according to claim 6 is the bucket link with a hook storage portion according to claim 5, wherein the lever stopper portion is integrally formed with the stopper.
In this way, the number of parts can be reduced.
According to the seventh aspect of the present invention, the second support shaft that connects the clamp handle to the clamp lever, the third support shaft that connects the clamp link to the clamp handle, and the clamp link are clamped immediately before the pressing body is positioned at the pressing position. The bucket link with a hook storage portion according to any one of claims 2 to 6, wherein the fourth support shaft supported by the base is set so as to be positioned in a straight line.
By doing so, immediately before the pressing body is positioned at the pressing position, a force larger than the operating force for swinging the clamp handle acts on the clamp lever so as to position the pressing body at the pressing position. Thus, the swinging operation of the clamp handle for setting the pressing body to the pressing position can be performed with a light operating force.
In the invention according to claim 8, the bucket link is configured using left and right link side plates and a link bottom plate that connects the left and right link side plates, and the hook storage portion is linked to the left and right link side plates. 8. The device according to claim 1, further comprising a space portion formed by a bottom plate, and the hook being housed in the hook housing portion in a posture of lying down with respect to the link bottom plate. It is a bucket link with a hook storage part of description.
And by doing in this way, since the hook is stored in the hook storage part in a posture to lie down with respect to the link bottom plate, the height of the left and right link side plates is as in the case of storing in the standing posture. The dimension does not need to be set high, and even a bucket link with a hook storage portion provided with a hook storage portion can contribute to miniaturization and weight reduction as much as possible.
The invention according to claim 9 is characterized in that the link bottom plate is provided with a positioning member which is disposed so as to be positioned inside the hook portion housed in the hook housing portion and positions the hook portion. It is a bucket link with a hook storage part as described in above.
And by doing in this way, it can fix more reliably, without the fixing position of a collar part shifting | deviating.

  Next, embodiments of the present invention will be described with reference to the drawings. In FIG. 1, reference numeral 1 denotes a hydraulic excavator with a crane function. The hydraulic excavator 1 includes a crawler type lower traveling body 2, an upper revolving body 3 that is pivotably mounted above the lower traveling body 2, The working device 4 is mounted on the upper swing body 3. The work device 4 further includes a boom 5 whose base end is swingably connected to the upper swing body 3, and a distal end portion of the boom 5. An arm 6 that is swingably connected to the arm 6, a bucket 7 that is swingably connected to the tip of the arm 6, a boom cylinder 8, an arm cylinder 9 that swings the boom 5, the arm 6, and the bucket 7, respectively. A member device such as a bucket cylinder 10 is provided, and a hook 11 described later is further provided.

The bucket 7 is connected to the tip of the arm 6 as follows, and is configured to swing with the expansion and contraction operation of the bucket cylinder 10.
That is, a pair of left and right mounting brackets 12 (only one of which is shown in FIG. 1) is integrally fixed to the base end portion of the bucket 7 by welding or the like. The other end side of the bucket link 15, which is swingably connected to the tip end portion of the arm 6 via 13, and whose one end side is swingably connected to the tip end portion of the bucket cylinder 10 via the second support shaft 14. In addition, it is connected through a third support shaft 16 in a swingable manner. Furthermore, the second support shaft 14 is connected to the other end of left and right connecting links 17 (only one of which is shown in FIG. 1) whose one end is swingably connected to the tip of the arm 6. Thus, the bucket 7 is configured to swing around the first support shaft 13 by the link operation of the bucket link 15 and the connecting link 17 accompanying the expansion and contraction operation of the bucket cylinder 10.

  As described above, one end of the bucket link 15 is swingably connected to the tip of the bucket cylinder 10 via the second support shaft 14, and the other end of the bucket link 15 is swinged to the bucket 7 via the third support shaft 16. It is a link that is movably connected, and the bucket 7 and the bucket cylinder 10 are connected by the bucket link 15, but as shown in FIGS. A cylinder connection shaft support portion 18 is formed on which the second support shaft 14 is rotatably supported, and a bucket connection shaft support portion on which the third support shaft 16 is rotatably supported on the other end side. 19 is formed.

  Here, the cylinder connection shaft support 18 and the bucket connection shaft support 19 are divided into left and right parts. Although not shown, the left and right connection links 17 are arranged on the left and right sides of the cylinder connection shaft support 18, while the tip of the bucket cylinder 10 is between the two divided cylinder connection shaft support portions 18. A cylinder shaft support portion (not shown) for pivotally supporting the portion on the second support shaft 14 is arranged. Further, the left and right mounting brackets 12 are disposed on the left and right sides of the bucket connecting shaft support 19, while the hook 11 is attached to the third support shaft 16 between the two divided bucket connecting shaft supports 19. A hook shaft support portion 20 for pivotally supporting is provided.

  Further, 21L and 21R are left and right link side plates that connect the cylinder connecting shaft support 18 and the bucket connection shaft support 19, and 22 is a link bottom plate that connects the left and right link side plates 21L and 21R. The left and right link side plates 21L and 21R and the link bottom plate 22 form a space portion having a substantially square cross section, and the space portion is a hook storage portion 23 in which the hook 11 is stored.

  The hook 11 includes a hook shaft support portion 20 that is rotatably supported by the third support shaft 16 described above, a support bracket 24 that is fixed to the hook shaft support portion 20, and a suspension ring that is supported by the support bracket 24. 25, a hook 26 is rotatably supported at the tip of the suspension ring 25 via a bearing (not shown). The hook is provided with a retaining member 26a for preventing a wire rope or the like from coming off from the flange 26. The hook 11 is moved from the hook housing portion 23 of the bucket link 15 by the hook shaft support portion 20 rotating about the third support shaft 16 (see FIG. 1). The hook 11 can be moved between the storage positions stored in the hook storage portion 23 (see FIGS. 2 and 3). The hook is stored in the hook storage unit 23 in a posture of lying down with respect to the face plate 22 (falling posture).

  On the other hand, as shown in FIGS. 2 to 5, a fixing device 27 for fixing the hook 11 in the storage position is attached to and supported by the mounting base 28 fixed to the link bottom plate 22. Although provided in a state, the fixing device 27 is configured by using a stopper body 29, a pressing body 30, a clamp mechanism portion 31 and the like which will be described later.

  The stopper body 29 is formed of an elastic material such as rubber or resin having elasticity, and is fixed to the mounting base 28. In this embodiment, the stopper body 29 is a hook. A stopper portion (corresponding to the stopper of the present invention) 29a and a lever stopper portion 29b are formed in a two-stage shape, and a hook storage portion is placed on the upper surface of the hook stopper portion 29a in a lying posture. 23, the hook portion 11 of the hook 11 housed in 23 is positioned so as to be placed.

  Here, as shown in FIGS. 4 and 5, the flange portion 26 is formed with a large inside diameter and a small outside diameter, and the outside small diameter portion 26a is an upper surface portion of the hook stopper portion 29a. It is supposed to be placed on.

  On the other hand, the clamp mechanism portion 31 includes a clamp base 32 attached to the mounting base 28, a proximal end side of the clamp lever 32 supported by the clamp base 32 in a swingable manner via the first support shaft 33, and a proximal end side of the clamp lever 32. The clamp handle 36 is swingably connected to the intermediate portion 34 via the second support shaft 35, and one end side is swingably connected to the intermediate portion of the clamp handle 36 via the third support shaft 37. The clamp base 32 is configured to use a clamp link 39 and the like that are supported by a clamp base 32 through a fourth support shaft 38 so as to be swingable.

  As described above, the clamp lever 34 is supported by the clamp base 32 so as to be swingable via the first support shaft 33 as described above, and the pressing body 30 is attached and supported on the distal end side of the clamp lever 34. Has been. The pressing body 30 is formed using an elastic material such as rubber or resin having elasticity, and the clamp lever 34 swings in conjunction with the swing operation of the clamp handle 36 as will be described later. It is displaced to a separation position that is separated from the flange portion 26 placed on the hook stopper portion 29a and a pressing position that presses the flange portion 26 toward the hook stopper portion 29a. In the state where the pressing body 30 is located at the separated position, the hook 11 can freely move between the storage position and the working position without the pressing body 30 interfering with the collar portion 26. (See FIGS. 2 and 4). On the other hand, in a state where the pressing body 30 is located at the pressing position, the flange portion 26 placed on the hook stopper portion 29a is sandwiched and fixed between the pressing body 30 and the hook stopper portion 29a. As a result, the hook 11 in the storage position can be fixed (see FIGS. 3 and 5). In this case, the pressing body 30 and the hook stopper portion 29a are in a slightly compressed state so as to elastically sandwich and fix the flange portion 26.

  On the other hand, as described above, the clamp handle 36 is slidably coupled to the intermediate portion of the clamp lever 34 via the second support shaft 35 as described above. A handle portion 40 that is operated to swing the handle 36 is provided. Further, as described above, one end side of the clamp link 39 is swingably connected to the intermediate portion of the clamp handle 36 via the third support shaft 37, and the other end side is connected to the clamp base 32 via the fourth support shaft 38. And is swingably supported. Then, the clamp handle 36 is linked to the swinging operation between the release position (see FIG. 4) standing up with respect to the link bottom plate 22 and the lock position (see FIG. 5). The clamp link 39 and the clamp lever 34 to be connected are swung so that the pressing body 30 can be displaced to the above-described separated position and pressing position.

  Here, the swing from the release position to the lock position of the clamp handle 36 that displaces the pressing body 30 between the separated position and the pressed position is a third operation for connecting the clamp link 39 to the clamp handle 36 as shown in FIG. A shaft P of the support shaft 37 connects a shaft P of the second support shaft 35 that connects the clamp handle 36 to the clamp lever 34 and a straight line P connecting the shaft center of the fourth support shaft 38 that supports the clamp link 39 to the clamp base 32. The clamp link 39 moving from one side to the other side is configured to be over dead center. Then, the clamp handle 36 is in the locked position, that is, the clamp link 39 is over the dead center and the axis of the third support shaft 37 is positioned on the other side of the straight line P (FIG. 6 ( In B), the reaction force acting on the clamp lever 34 from the pressing body 30 and the hook stopper portion 29a for clamping and fixing the collar portion 26 acts in a direction to hold the clamp handle 36 in the lock position. Thus, the clamp handle 39 in the locked position can be securely held.

  Further, the dead center of the clamp link 39 that accompanies the swing of the clamp handle 36 from the release position to the lock position is set to be performed immediately before the pressing body 30 is positioned at the pressing position. That is, when the clamp link 39 is located at the dead center, the second support shaft 35 that connects the clamp handle 36 to the clamp lever 34, the third support shaft 37 that connects the clamp link 39 to the clamp handle 36, and the clamp The fourth support shaft 38 that supports the link 39 on the clamp base 32 is positioned on a straight line. In this state, the swing direction of the clamp handle 36 and the swing direction of the clamp link 39 are the same. Therefore, a force larger than the operating force for swinging the clamp handle 36 acts as a force for swinging the clamp lever 34 to position the pressing body 30 at the pressing position. Thus, immediately before the pressing body 30 is positioned at the pressing position, a force larger than the operating force is applied to the clamp lever 34. Thus, in order to position the pressing body 30 at the pressing position, as described above. Even if it is accompanied by compression of the pressing body 30 and the hook stopper part 29a, it is comprised so that it can carry out with a light operation force.

  Further, as shown in FIGS. 5 and 6B, the clamp lever 36 is pressed against the lever stopper portion 29b of the stopper body 29 when the clamp handle 36 is positioned at the locked position. A stopper abutting portion 34a is provided to abut against the. The reaction force acting on the clamp lever 34 from the lever stopper portion 29b in the state where the clamp handle 36 is positioned at the lock position is the same as the reaction force acting on the clamp lever 34 from the hook stopper portion 29a and the pressing body 30 described above. In addition, it acts in a direction to hold the clamp handle 36 in the locked position. Thus, even if there is no reaction force acting on the clamp lever 34 from the hook stopper portion 29a and the pressing body 30, the clamp handle 36 is held in the locked position by the reaction force acting on the clamp lever 34 from the lever stopper portion 29b. ing.

  That is, the hook 11 is not fixed by the fixing device 27 in the state where the hook 11 is located at the working position where the hanging work is performed, but at this time, the release position where the clamp handle 36 stands up from the link bottom plate 22. 4, the distal ends of the clamp handle 36 and the clamp lever 34 protrude from the bucket link 15 (see FIG. 4), and the fixing device 27 is damaged or interferes with work due to rattling due to airframe vibration or the like. There is a fear. Therefore, it is preferable to hold the clamp handle 36 in the locked position even when the hook 11 is in the working position. In this case, since the hook portion 26 is not clamped and fixed, the hook stopper portion 29a and the press There is no reaction force acting on the clamp lever 34 from the body 30, and the clamp handle 36 cannot be held in the locked position by the reaction force. However, in this case, the clamp handle 36 can be held in the locked position by the reaction force acting on the clamp lever 34 from the lever stopper portion 29b, and thus the hook 11 is in the working position. Also, the clamp handle 36 can be held in the locked position.

  In the present embodiment configured as described, the bucket link 15 that connects the bucket 7 and the bucket cylinder 10 has a link bottom plate 22 that connects the left and right link side plates 21L and 21R and the left and right link side plates 21L and 21R. And the hook storage portion 23 having a substantially letter-shaped cross section is formed, and the hook 11 when not in use is stored in the hook storage portion 23. Is housed in the hook housing portion 23 in a lying posture in which it lies down with respect to the link bottom plate 22 and is fixed by the fixing device 27. The fixing device 27 presses the stopper body 29 fixed to the link bottom plate 22 of the bucket link 15 via the mounting base 28 and the hook portion 29 of the hook 11 against the hook stopper portion 29 a formed on the stopper body 29. Thus, a clamp 30 that clamps and fixes the collar portion 26 between the hook stopper portion 29a, and a clamp that displaces the pressure body 30 to a separated position that separates the collar portion 26 and a pressing position that presses the collar portion 26. In this case, the stopper body 29 and the pressing body 30 are formed using an elastic material.

  As a result, the hook 11 accommodated in the hook accommodating portion 23 is securely fixed by clamping the collar portion 26 between the pressing body 30 made of an elastic material and the hook stopper portion 29a, and excavation or the like. In such a case, it is possible to reliably prevent noise and damage to the hook 11 due to rattling without rattling.

  Moreover, in this case, the hook 11 is configured to be housed in the hook housing portion 23 in a lying posture in which the collar portion 26 lies down with respect to the link bottom plate 22. Thus, it is not necessary to set the height of the left and right link side plates 21L and 21R high, and even the bucket link 15 with the hook storage portion provided with the hook storage portion 23 is made as small as possible. Can contribute to weight reduction.

  The clamp mechanism 31 for displacing the pressing body 30 between the separation position and the pressing position includes a clamp base 32 fixed to the link bottom plate 22 of the bucket link 15 via the mounting base 28, and a pressing body on the tip side. 30, a clamp lever 34 whose base end side is swingably supported by the clamp base 32 via the first support shaft 33, and a handle portion 40 is provided on the tip end side, and the base end side is intermediate the clamp lever 34. A clamp handle 36 that is swingably connected to a part via a second support shaft 35, and one end side is swingably connected to an intermediate part of the clamp handle 36 via a third support shaft 37, and the other end side is clamped A clamp link 39 is supported on the base 32 through a fourth support shaft 38 so as to be swingable. The clamp handle 36 is swung between a release position and a lock position. It the pressing member 30 in the swing of the clamp lever 34 interlocking will be allowed to displace in the separated position and the pressing position to the.

  As a result, the pressing body 30 can be displaced between the separated position and the pressing position by a simple operation of simply swinging the clamp handle 36, and the hook 11 can be easily fixed and released. Moreover, it can be performed in a short time and can greatly contribute to the improvement of workability.

  Moreover, when the clamp handle 36 that displaces the pressing body 30 from the separated position to the pressed position is swung from the release position to the lock position, the third support shaft 37 that connects the clamp link 39 to the clamp handle 36 causes the clamp handle 36 to move. This is accompanied by exceeding the dead point of the clamp link 39 that moves from one side of the straight line P connecting the second support shaft 35 connected to the clamp lever 34 and the fourth support shaft 38 that supports the clamp link 39 to the clamp base 32. At the same time, when the clamp link 39 exceeds the dead point and the third support shaft 37 is located on the other side of the straight line P, the reaction force acting on the clamp lever 34 from the hook stopper portion 29a and the pressing body 30 is clamped. Since the handle 36 is configured to act in a direction to hold the handle 36 in the locked position, the clamp handle 36 is surely locked in the locked position. It can be held, that is supposed to hook 11 can be reliably fixed, can have high reliability fixing device 27.

  Furthermore, in this case, immediately before the pressing body 30 is positioned at the pressing position, a second support shaft 35 that connects the clamp handle 36 to the clamp lever 34, and a third support shaft 37 that connects the clamp link 39 to the clamp handle 36, The fourth support shaft 38 that supports the clamp link 39 on the clamp base 32 is set so as to be in a straight line. In this way, the second, third, and fourth support shafts 35, 37, and 38 are In a state where the clamp handle 36 is positioned in a straight line, the swing direction of the clamp handle 36 and the swing direction of the clamp link 39 coincide with each other. Therefore, a force larger than the operating force for swinging the clamp handle 36 is applied. Is operated to the clamp lever 34 in order to position the pressing body 30 at the pressing position, and thus the swinging operation of the clamp handle 36 for setting the pressing body 30 to the pressing position is a light operation. It can be carried out in.

  Further, when the clamp handle 36 is in the lock position, the stopper contact portion 34a of the clamp lever 34 contacts the lever stopper portion 29b formed on the stopper body 29 in a pressing state, and the lever stopper portion 29b extends from the clamp lever. The reaction force acting on 34 acts in a direction to hold the clamp handle 36 in the locked position. As a result, even when the lifting work is performed, that is, when the hook 11 is not fixed by the fixing device 27, if the clamp handle 36 is set to the locked position, the reaction force acting on the clamp lever 34 from the lever stopper portion 29b The clamp handle 36 can be held in the locked position, and thus the fixing device 27 can be prevented from protruding or rattling from the bucket link 15 during a lifting operation, and the fixing device 27 can be damaged. The possibility of getting in the way of work can be reliably avoided.

Of course, the present invention is not limited to the above embodiment, and in the above embodiment, the pressing body 30 and the hook stopper portion 29a are both formed of an elastic material, but at least one of them is an elastic material. If so, the present invention can be implemented.
Further, in the above embodiment, the hook stopper portion 29a and the lever stopper portion 29b are integrally formed to form the stopper body 29, thereby reducing the number of parts, but may be separate.
Further, a positioning member may be provided on the link bottom plate 22 so that the fixing position of the collar part 26 accommodated in the hook accommodating part 23 is not shifted. In this case, as shown in FIG. By positioning the positioning member 41 having a shape substantially conforming to the shape so as to be positioned inside the hook portion 26 in the lying posture stored in the hook storage portion 23, the fixing position of the hook portion 26 is shifted. And more secure fixing can be performed.

It is a side view of a hydraulic excavator with a crane function. It is a perspective view of a bucket link when a press body is located in a separation position. It is a perspective view of a bucket link when a press body is located in a press position. It is a principal part side view when a press body is located in a separation position. It is a principal part side view when a press body is located in a press position. (A), (B) is a figure which shows before and after exceeding the dead center of a clamp link. It is a perspective view of the bucket link which provided the positioning member.

Explanation of symbols

7 Bucket 10 Bucket Cylinder 11 Hook 15 Bucket Link 21L, 21R Link Side Plate 22 Link Bottom Plate 23 Hook Storage Part 26 Hook 27 Fixing Device 29 Stopper Body 29a Hook Stopper (Stopper)
29b Lever stopper portion 30 Press body 31 Clamp mechanism portion 32 Clamp base 33 First support shaft 34 Clamp lever 35 Second support shaft 36 Clamp handle 37 Third support shaft 38 Fourth support shaft 39 Clamp link 40 Handle portion 41 Positioning member 41

Claims (9)

  In a bucket link with a hook storage part in which a hook storage part for storing a hook for lifting work is provided on a bucket link that connects the bucket and the bucket cylinder, the hook stored in the hook storage part is attached to the bucket link. In providing a fixing device to be fixed, the fixing device includes a stopper fixed to the bucket link, and a pressing body that clamps and fixes the collar portion between the stopper by pressing the collar portion of the hook against the stopper, The pressing body is configured to include a clamp mechanism that displaces the pressing body away from the collar and a pressing position that presses the collar, and at least one of the stopper and the pressing body is made of an elastic material. A bucket link with a hook storage portion, characterized by being formed.   The crank mechanism portion includes a clamp base fixed to the bucket link, a clamp body that is provided with a pressing body on the distal end side, and a base end side of which is swingably supported by the clamp base via a first support shaft, A grip handle is provided on the distal end side, a proximal end side is pivotally connected to an intermediate portion of the clamp lever via a second support shaft, and one end side is a third support shaft on an intermediate portion of the clamp handle. And a clamp link that is pivotably supported by the clamp base via a fourth support shaft and swings the clamp handle to a release position and a lock position. The bucket link with a hook receiving portion according to claim 1, wherein the pressing body is displaced to a separation position and a pressing position by swinging of a clamp lever linked to the dynamic operation.   The hook storage portion according to claim 2, wherein a reaction force acting on the clamp lever from the stopper or the pressing body acts in a direction to hold the clamp handle in the lock position at the pressing position of the pressing body. With bucket link.   When the clamp handle is moved from the separated position to the pressed position, the clamp handle is pivoted from the release position to the locked position. The second support that connects the clamp handle to the clamp lever is connected to the second support that connects the clamp link to the clamp handle. The dead center of the clamp link moving from one side to the other side of the straight line connecting the shaft and the fourth support shaft supporting the clamp link to the clamp base is accompanied, and the clamp link exceeds the dead point and the third support shaft. 4. In a state where is located on the other side of the straight line, a reaction force acting on the clamp lever from the stopper or the pressing body acts in a direction to hold the clamp handle in the lock position. The bucket link with a hook storage part as described in 4.   The lever stopper part that presses against the clamp lever when the clamp handle is in the locked position is formed using an elastic material, and the reaction force that acts on the clamp lever from the lever stopper part holds the clamp handle in the locked position. The bucket link with a hook storage unit according to any one of claims 2 to 4, wherein the bucket link is configured to act in a direction in which the hook is stored.   6. The bucket link with a hook receiving portion according to claim 5, wherein the lever stopper portion is integrally formed with the stopper.   Immediately before the pressing body is positioned at the pressing position, the second support shaft that connects the clamp handle to the clamp lever, the third support shaft that connects the clamp link to the clamp handle, and the fourth support that supports the clamp link to the clamp base. The bucket link with a hook storage part according to any one of claims 2 to 6, wherein the bucket link is set so as to be positioned on a straight line.   The bucket link is configured by using left and right link side plates and a link bottom plate that connects the left and right link side plates, and a hook storage portion is formed by the left and right link side plates and the link bottom plate. 8. The bucket with hook receiving portion according to claim 1, further comprising a space portion, wherein the hook is stored in the hook storing portion in a posture of lying down with respect to the link bottom plate. 9. Link.   9. With the hook storage part according to claim 8, wherein a positioning member for positioning the collar part is provided on the link bottom plate so as to be positioned inside the collar part accommodated in the hook storage part. Bucket link.

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