JP2020159175A - Attachment mounting jig of construction machine and construction machine - Google Patents

Abstract

To sandwich a fixed jaw part side connection pin and a movable jaw part side connection pin which are provided on an attachment without manually operating a fixed jaw part side closing part and a movable jaw part side closing part by an operator.SOLUTION: A fixed jaw part side closing part 1a33 is provided with a fixed closing part side pin sandwiching part 1a33 that sandwiches a fixed jaw part side connection pin 2a between a fixed jaw part side pin sandwiching part 1a31 and the fixed closing part side pin sandwiching part 1a33, a fixed closing part side connection pin guiding surface 1a33b that is, at the time of contacting the fixed jaw part side connection pin 2a, rotated and guides the fixed jaw part side connection pin 2a to the sandwiching state between the fixed jaw part side pin sandwiching part 1a31 and the fixed closing part side pin sandwiching part 1a33 is provided, on the contrary, a movable jaw part side closing part 1b33 is also provided with a movable closing part side pin sandwiching part 1b35a, and a movable closing part side pin guiding surface 1b35b. In addition, a fixed jaw part 1a is provided with an engaged part 1a35, on the contrary, the movable jaw part side closing part 1b33 is provided with an engaging part 1b35 engaged with the engaged part 1a35 of the fixed jaw part 1a.SELECTED DRAWING: Figure 5

Description

The present invention relates to an attachment mounting jig for construction machinery such as a power shovel and construction machinery.

Conventionally, as an attachment attachment jig for construction machines such as power shovels, a fixed jaw portion with one end open and a movable jaw portion are engaged with two connecting pins provided at predetermined intervals on attachments such as buckets. After that, a mechanism that urges the movable jaw portion to separate from the fixed jaw portion by a restricting material and a coil spring (see, for example, Patent Document 1), or a mechanism that drives the screw or the like to fix the movable jaw portion. A mechanism for urging the movable jaw portion away from the fixed jaw portion (see, for example, Patent Document 3) by urging the movable jaw portion away from the fixed jaw portion by a dedicated bucket cylinder. It has also been proposed that the pin accommodating portion of the movable jaw portion and the fixed jaw portion is closed by the fixed jaw portion side closing portion and the movable jaw portion side closing portion (see, for example, Patent Documents 4 and 5). ..

Japanese Unexamined Patent Publication No. 2011-231505 Utility Model Registration No. 3134696 Japanese Unexamined Patent Publication No. 2006-169886 Japanese Patent No. 621324 Japanese Patent No. 6430671

However, in the attachment attachment jigs for construction machines disclosed in Patent Documents 1 to 5 described above, fixed jaw portion side connecting pins and movable jaw portion side connecting pins provided at predetermined intervals in various attachments such as buckets are respectively provided. After moving to the fixed jaw side pin accommodating part of the fixed jaw part attached to the tip of the operating arm of the construction machine and the movable jaw part side pin accommodating part of the movable jaw part, the worker closes the fixed jaw part side. It is necessary to manually rotate each of the movable jaw portion side closing portion and the movable jaw portion side connecting pin to sandwich the fixed jaw portion side connecting pin and the movable jaw portion side connecting pin, which causes a problem that the attachment mounting work is troublesome.

In particular, recently, due to the problem of labor shortage, there is a demand for attachment mounting jigs for construction machines that can easily perform attachment mounting work.

Further, in the attachment mounting jig for construction machinery described in Patent Documents 1 to 3 described above, after engaging a connecting pin with a fixed jaw portion and a movable jaw portion that are open at one end, a regulating material, a coil spring, a screw, or the like are used. Since a regulation mechanism is required to urge the movable jaw portion to separate from the fixed jaw portion by a bucket cylinder or the like, there is also a problem that the cost increases accordingly.

Therefore, the present invention has been made by paying attention to such a problem, and the fixed jaw provided on the attachment without the worker manually operating the fixed jaw side closing portion and the movable jaw portion side closing portion. It is an object of the present invention to provide a construction machine attachment mounting jig and a construction machine capable of sandwiching a part-side connecting pin and a movable jaw part-side connecting pin.

In order to solve the above problems, the attachment mounting jig for the construction machine according to the present invention has a power shovel or the like for each of the fixed jaw side connecting pin and the movable jaw side connecting pin provided at predetermined intervals in various attachments such as a bucket. A movable jaw connecting link is provided to the fixed jaw side pin accommodating portion of the fixed jaw portion attached to the tip of the operating arm of the construction machine and the tip of the piston that expands and contracts from the bucket cylinder provided on the operating arm of the construction machine. After accommodating the movable jaw portion side pin accommodating portion of the movable jaw portion attached to the movable jaw portion, the opening of the fixed jaw portion side pin accommodating portion and the opening of the movable jaw portion side pin accommodating portion are fixed. An attachment mounting jig for a construction machine that is closed by a portion-side closing portion and a movable jaw portion-side closing portion to attach an attachment, and the fixed jaw portion-side closing portion and the movable jaw portion-side closing portion are respectively the fixed jaw. It is rotatably supported by the portion and the movable jaw portion, and the fixed jaw portion side closing portion is formed when the fixed jaw portion side connecting pin is accommodated in the fixed jaw portion side pin accommodating portion. A fixed closing portion side pin holding portion for sandwiching the fixed jaw portion side connecting pin is provided between the fixed jaw portion side pin holding portion of the portion, and the fixed jaw portion side connecting pin is provided on the fixed jaw portion side. When the contact is made when the pin is not accommodated in the pin accommodating portion, the fixed jaw portion side closing portion is rotated so as to open, and the fixed jaw portion side connecting pin is accommodated in the fixed jaw portion side pin accommodating portion. While the fixed closing portion side connecting pin guide surface for guiding is provided, the movable jaw portion side closing portion is provided when the movable jaw portion side connecting pin is accommodated in the movable jaw portion side pin accommodating portion. A movable closing portion side pin holding portion for sandwiching the movable jaw portion side connecting pin is provided between the movable jaw portion and the movable jaw portion side holding portion, and the movable jaw portion side connecting pin is provided with the movable jaw portion side connecting pin. When the contact is made when the pin is not accommodated in the pin accommodating portion, the movable jaw portion side closing portion is rotated so as to open, and the movable jaw portion side connecting pin is accommodated in the movable jaw portion side pin accommodating portion. It is characterized in that a movable closing portion side pin guide surface for guiding the chin is provided.
Further, in the attachment mounting jig of the construction machine according to the present invention, the fixed jaw portion is provided with an engaged portion, while the movable jaw portion side closing portion is engaged with the fixed jaw portion. An engaging portion that engages with the portion is provided, and when the fixed jaw portion and the movable jaw portion are most closed, the engaged portion of the fixed jaw portion and the movable jaw portion side closing portion are engaged. The movable jaw portion is maintained in a closed state in which the movable jaw portion is not arbitrarily separated from the fixed jaw portion by engaging with the joint portion, and the movable jaw portion side connecting pin is accommodated in the movable jaw portion side pin accommodating portion. When the movable jaw portion side closing portion rotates, the engaged portion of the fixed jaw portion that was engaged and the engaging portion of the movable jaw portion side closing portion are disengaged, and the fixed jaw portion is described as described above. It is also characterized in that the movable jaw part is configured to open.
Further, in the attachment mounting jig of the construction machine according to the present invention, the movable jaw portion side closing portion is assisted by the movable jaw portion side connecting pin that guides the movable jaw portion side connecting pin to the movable jaw portion side pin guide surface. It is also characterized by being provided with a guide plate.
Further, in the attachment attachment jig for a construction machine according to the present invention, the fixed jaw portion side of the various attachments provided on the outside of the opening of the movable jaw portion side pin accommodating portion of the movable jaw portion and attached by the construction machine. The movable jaw portion side connecting pin having the smallest pin distance between the connecting pin and the movable jaw portion side connecting pin and the maximum movable jaw portion side connecting pin also come into contact with each other, and the movable jaw portion side connecting pin is the movable jaw portion side pin accommodating portion. After the fixed jaw portion side connecting pin is accommodated in the movable jaw portion side connecting pin guide surface and the fixed jaw portion side pin accommodating portion of the fixed jaw portion, the hydraulic cylinder of the construction machine or the like is operated. When the movable jaw portion is brought closer to the movable jaw portion side connecting pin and the movable jaw portion side connecting pin is accommodated in the movable jaw portion side pin accommodating portion of the movable jaw portion, the various attachments attached by the construction machine are attached. Among them, the movable jaw portion side connecting pin is the movable jaw portion side connecting pin even in the movable jaw portion side connecting pin having the minimum pin spacing and the maximum movable jaw portion side connecting pin between the fixed jaw portion side connecting pin and the movable jaw portion side connecting pin. It is also characterized by having jaws that prevent the movable jaws from being over-closed with respect to the fixed jaws so as to come into contact with the guide surface of the connecting pin on the portion side.
Further, the construction machine according to the present invention is characterized by having a bucket mounting structure of any of the above-mentioned construction machines.

In the attachment mounting jig and the construction machine of the construction machine according to the present invention, the fixed jaw portion side closing portion and the movable jaw portion side closing portion are rotatably supported by the fixed jaw portion and the movable jaw portion, respectively. It is configured to be closed before the attachment is attached, and the fixed jaw side closing part fixes the fixed jaw part when the fixed jaw part side connecting pin is accommodated in the fixed jaw part side pin accommodating part. A fixed closing part side pin holding part is provided to hold the fixed jaw part side connecting pin between the pin holding part and the fixed jaw part side connecting pin, and the fixed jaw part side connecting pin is housed in the fixed jaw part side pin accommodating part. If it comes into contact when it is not in contact, the fixed jaw side closing part is rotated so as to open, and then the fixed jaw part side connecting pin is accommodated and fixed in the fixed jaw part side pin accommodating part. A fixed closing side connecting pin guide surface is provided to guide the jaw portion side pin holding portion and the fixed closing portion side pin holding portion so as to be sandwiched, while the movable jaw portion side closing portion is provided on the movable jaw portion side. When the movable jaw portion side connecting pin is accommodated in the pin accommodating portion, a movable closing portion side pin holding portion for sandwiching the movable jaw portion side connecting pin with the movable jaw portion side holding portion of the movable jaw portion is provided. If the movable jaw portion side connecting pin comes into contact with the movable jaw portion side pin accommodating portion when it is not accommodated in the movable jaw portion side pin accommodating portion, the movable jaw portion side closing portion is rotated to open and then closed. Movable closed part side pin guide surface that guides the movable jaw part side connecting pin to be accommodated in the movable jaw part side pin accommodating part and sandwiched between the movable jaw part side pin holding part and the movable closing part side pin holding part. Is provided.
Therefore, according to the attachment mounting jig and the construction machine of the construction machine according to the present invention, the fixed jaw portion side connecting pin and the movable jaw portion side connecting pin provided at predetermined intervals on the attachment side are operated by the construction machine, respectively. Move to the fixed jaw side pin accommodating part of the fixed jaw part provided on the arm side and the movable jaw side pin accommodating part of the movable jaw part, and close and sandwich the fixed jaw part side closing part and the movable jaw part side closing part. At this time, the worker can sandwich the fixed jaw portion side closing portion and the movable jaw portion side closing portion without manually operating.

It is a front view which shows the state when the bucket is attached to the actuating arm via the attachment attachment jig of the construction machine of embodiment which concerns on this invention. It is a perspective view of the attachment attachment jig of the construction machine of embodiment which concerns on this invention. It is another perspective view of the attachment attachment jig of the construction machine of embodiment which concerns on this invention. It is a partial notch front view which shows the state which the engaging part of the movable jaw part side closing part is engaged with the engaged part of the fixed jaw part in the attachment attachment jig of the construction machine of embodiment which concerns on this invention. Partial cutout front view showing a state in which the engaged portion of the movable jaw portion side closed portion and the engaged portion of the fixed jaw portion are disengaged in the attachment mounting jig of the construction machine according to the present invention. Is. It is a perspective view which shows another structural example of the attachment attachment jig of the construction machine of embodiment which concerns on this invention. It is a perspective view which shows still another structural example of the attachment attachment jig of the construction machine of embodiment which concerns on this invention.

Hereinafter, the construction machine of the embodiment according to the present invention, the attachment attachment jig and the construction machine thereof will be described with reference to the drawings. However, the embodiments described below are merely examples of the present invention, and the present invention is not limited to the embodiments described below, and is appropriately within the scope of the technical idea of the present invention. It can be changed.

As shown in FIG. 1, the attachment attachment jig 1 of the construction machine according to the present invention has a fixed jaw portion side connecting pin 2a provided at a predetermined interval in the rear portion of a bucket 2 which is one of the attachments. And the movable jaw portion side connecting pin 2b are attached to the fixed jaw portion 1a attached to the tip of the operating arm 3a of a construction machine such as a power shovel (not shown) and the tip of the piston 3b1 that expands and contracts from the bucket cylinder 3b, respectively. Various attachments 2 such as a bucket, a hammer, a crusher (crusher), and a skeleton bucket (sieving bucket) are attached by engaging the movable jaw portion 1b attached via the movable jaw connecting link 3c.

In FIG. 1, 3d has a base end portion rotatably connected to the operating arm 3a, while the tip end portion of the piston 3b1 extending and contracting from the bucket cylinder 3b and the base end portion of the movable jaw connecting link 3c. Are rotatably connected arm links. Further, the configurations and connecting structures of the attachment 2 other than the attachment mounting jig 1, the operating arm 3a, the bucket cylinder 3b, the movable jaw connecting link 3c, the arm link 3d, and the like are the same as those of the conventional one and are well known.

<Structure of attachment mounting jig 1>
As shown in FIGS. 1 to 5, the attachment mounting jig 1 according to the embodiment of the present invention has a structure in which the fixed jaw portion 1a and the movable jaw portion 1b are rotatable between the jaw portions via a rotation shaft 1c. The fixed jaw portion 1a is connected to the fixed jaw portion side connecting pin 2a, while the movable jaw portion 1b is connected to the movable jaw portion side connecting pin 2b. In the attachment mounting jig 1 shown in FIGS. 2 and 3, the jaw portions rotating shaft 1c, the fixed jaw side rotating shaft 3a1, the movable jaw side rotating shaft 3c1, and the like are omitted.

(Fixed jaw part 1a)
In the fixed jaw portion 1a, as shown in FIGS. 1, 4 and 5, the fixed jaw side connecting plate 1a1 is rotatably connected to the tip end portion of the operating arm 3a of the construction machine via the fixed jaw side rotating shaft 3a1. A hook plate 1a3 on the fixed jaw portion side is provided at the lower end portion of the fixed side connecting plate 1a1 via a fixed side horizontal substrate 1a2. Therefore, as shown in FIGS. 2 and 3, the fixed jaw portions 1a are provided with annular jaw portions rotating bearing portions 1a4 and 1a4 that support the jaw portions rotating shaft 1c. An annular fixed jaw-side rotating bearing portion 1a5, 1a5 for supporting the fixed jaw-side rotating shaft 3a1 is provided, and the jaw portions rotate bearing portions 1a4, 1a4 and the fixed jaw-side rotating bearing portion 1a5, 1a5. Each of the jaw portions is provided with a through hole penetrating in the vertical direction so that a retaining pin (not shown) is inserted so that the rotation shaft 1c and the fixed jaw side rotation shaft 3a1 do not come off from each other. There is.

As shown in FIGS. 4 and 5, the fixed jaw side hook plate 1a3 has one end open to engage with the fixed jaw side connecting pin 2a and substantially corresponds to the outer peripheral surface of the fixed jaw side connecting pin 2a. Rotates via the fixed jaw side pin holding portion 1a31 forming the fixed jaw portion side pin accommodating portion 1a30 having a semi-arc-shaped cross section and the fixed jaw portion side closing portion rotating shaft 1a32 on the fixed jaw portion side hook plate 1a3. The fixed jaw side connecting pin 2a is accommodated in the fixed jaw side pin accommodating portion 1a30, and then the opening side of the fixed jaw portion side pin accommodating portion 1a30 is closed to close the fixed jaw portion side connecting pin 2a. The fixed jaw side closing portion 1a33 that prevents pinching and falling off and the fixed jaw portion side closing portion 1a33 as shown in FIG. 5 close the opening side of the fixed jaw portion side pin accommodating portion 1a30 and the fixed jaw portion side connecting pin 2a. A fixed jaw side lock pin insertion hole 1a34 into which a removable lock pin (not shown) is inserted so that the fixed jaw side closing portion 1a33 does not rotate freely after sandwiching the above, and various attachments such as a bucket. Engaged portion 1a35 that engages with the engaging portion 1b35 provided on the movable jaw portion side closing portion 1b33 in order to prevent the fixed jaw portion 1a and the movable jaw portion 1b from separating (opening) before being connected to 2. Etc. are provided.

The fixed jaw portion side closing portion 1a33 is formed in a substantially arcuate cross-sectional shape corresponding to the outer peripheral surface of the fixed jaw portion side connecting pin 2a, and when closed, the fixed jaw portion side with the fixed jaw portion side pin holding portion 1a31. A fixed closing portion side pin holding portion 1a33a for sandwiching the side connecting pin 2a is provided, and a fixed jaw portion is provided before the fixed jaw portion side connecting pin 2a is accommodated and sandwiched in the fixed jaw portion side pin accommodating portion 1a30. When the side connecting pin 2a comes into contact, the fixed jaw side closing portion 1a33 is rotated counterclockwise (β direction) to guide the fixed jaw portion side connecting pin 2a to the fixed jaw portion side pin accommodating portion 1a30. The closing portion side connecting pin guide surface 1a33b is provided.

Here, as shown in FIGS. 4 and 5, the rotation shaft 1a32 for the fixed jaw portion side closing portion is provided eccentrically to the upper left side of FIGS. 4 and 5 with respect to the center of gravity of the fixed jaw portion side closing portion 1a33. When the fixed jaw portion side connecting pin 2a is not accommodated in the fixed jaw portion side pin accommodating portion 1a30, the fixed jaw portion side closing portion 1a33 is set to the fixed jaw portion side closing portion 1a33 due to the weight of the fixed jaw portion side closing portion 1a33. It is configured to rotate clockwise (α direction) from the state shown in FIG. 4 around the rotation shaft 1a32. Therefore, at the lower end of the hook plate 1a3 on the fixed jaw portion side, the lower end portion of the closed portion 1a33 on the fixed jaw portion side is prevented from rotating clockwise (α direction) beyond the state shown in FIG. A fixed jaw portion side closing portion rotation stopper 1a36 is further provided to prevent the fixed jaw portion side closing portion 1a33 from rotating excessively in contact with the fixed jaw portion side closing portion 1a33. The fixed jaw portion side closing portion 1a33 is not the eccentricity of the fixed jaw portion side closing portion rotating shaft 1a32 and its weight, but the fixed jaw portion side connecting pin 2a that tends toward the fixed jaw portion side pin accommodating portion 1a30. May be configured to rotate clockwise (α direction) by pushing the side of the fixed jaw portion side closing portion 1a33 facing the fixed closing portion side pin holding portion 1a33a.

The engaged portion 1a35 is formed by bending a steel plate having a predetermined width into a front view fishing hook shape as shown in FIGS. 4 and 5, so that the tip portion thereof is elastically deformed, and the movable jaw portion is formed. The engaging portion 1b35 provided on the side closing portion 1b33 is configured to engage reliably and elastically.

That is, as shown in FIG. 4, the fixed jaw portion 1a and the movable jaw portion 1b are in the most closed state, and the movable jaw portion side closing portion 1b33 rotates counterclockwise (β direction) to close the movable jaw portion side. When the engaging portion 1b35 provided on the portion 1b33 comes into contact with the engaged portion 1a35 of the fixed jaw portion 1a, the engaged portion 1a35 elastically deforms and the engaging portion 1b35 provided on the movable jaw portion side closing portion 1b33 While the fixed jaw portion 1a is engaged with the engaged portion 1a35 of the fixed jaw portion 1a and the fixed jaw portion 1a and the movable jaw portion 1b are maintained in the most closed state, the movable jaw portion side closing portion 1b33 is clockwise (in that state). When rotated in the α direction), the engaging portion 1b35 provided on the movable jaw portion side closing portion 1b33 is disengaged from the engaged portion 1a35 of the fixed jaw portion 1a, and the engaging portion 1b35 and the jaw of the movable jaw portion side closing portion 1b33. The engaged portion 1a35 of the portion 1a is not engaged, and the movable jaw portion 1b is opened with respect to the fixed jaw portion 1a.

(Movable jaw part 1b)
As shown in FIGS. 1, 4 and 5, the movable jaw portion 1b is attached to the tip of the piston 3b1 that expands and contracts from the bucket cylinder 3b via the movable jaw connecting link 3c, and the jaw portions rotate with respect to the fixed jaw portion 1a. It is rotatably provided around the moving shaft 1c, and as shown in FIG. 5, the movable jaw connecting portion 1b1 rotates at the tip of the movable jaw connecting link 3c via the movable jaw side rotating shaft 3c1. The movable jaw portion side hook plate 1b3 is provided at the lower end portion of the movable side connecting portion 1b1 via the movable side horizontal substrate 1b2.

Therefore, as shown in FIGS. 4 and 5, the movable jaw portions 1b are provided with jaw portions rotating shaft hole portions 1b4, 1b4 into which the jaw portions rotating shafts 1c are inserted, and are movable. An annular movable jaw-side rotating bearing portion 1b5, 1b5 for supporting the jaw-side rotating shaft 3c1 is provided, and the movable jaw-side rotating bearing portions 1b5, 1b5 are provided with the movable jaw-side rotating shaft 3c1 respectively. A through hole is provided to penetrate in the vertical direction so that a retaining pin (not shown) can be inserted so that the bearing does not come off.

As shown in FIGS. 4 and 5, the movable jaw portion side hook plate 1b3 has a substantially cross section corresponding to the outer peripheral surface of the movable jaw portion side connecting pin 2b with one end open to sandwich the movable jaw portion side connecting pin 2b. The movable jaw portion side pin holding portion 1b31 forming the semi-arc-shaped movable jaw portion side pin accommodating portion 1b30 and the movable jaw portion side hook plate 1b3 can be rotated via the movable jaw portion side closing portion rotating shaft 1b32. The movable jaw portion side connecting pin 2b is accommodated in the movable jaw portion side pin accommodating portion 1b30, and then the opening side of the movable jaw portion side pin accommodating portion 1b30 is closed to sandwich the movable jaw portion side connecting pin 2b. The movable jaw portion side closing portion 1b33 and the movable jaw portion side closing portion 1b33 as shown in FIG. 5 close the opening side of the movable jaw portion side pin accommodating portion 1b30 to close the movable jaw portion side connecting pin 2b. It is provided with a lock pin insertion hole 1b34 or the like into which a removable lock pin (not shown) is inserted so that the movable jaw portion side closing portion 1b33 does not rotate arbitrarily after being sandwiched.

The movable jaw portion side closing portion 1b33 is formed in a substantially arcuate cross section corresponding to the outer peripheral surface of the movable jaw portion side connecting pin 2b, and when closed, the movable jaw portion is connected to the movable jaw portion side pin holding portion 1b31. A movable closing portion side pin holding portion 1b33a for sandwiching the side connecting pin 2b is provided, and a movable jaw portion is provided before the movable jaw portion side connecting pin 2b is accommodated and sandwiched in the movable jaw portion side pin accommodating portion 1b30. When the side connecting pin 2b comes into contact, the movable jaw side closing portion 1b33 is rotated counterclockwise (β direction) to guide the movable jaw portion side connecting pin 2b to the movable jaw portion side pin accommodating portion 1b30. A pin guide surface 1b33b on the closing portion side is provided.

Here, as shown in FIGS. 4 and 5, the movable jaw portion side closing portion rotating shaft 1b32 is provided eccentrically to the upper right side of FIG. 5 with respect to the center of gravity of the movable jaw portion side closing portion 1b33, and is movable. When the movable jaw portion side connecting pin 2b is not accommodated in the jaw portion side pin accommodating portion 1b30, the movable jaw portion side closing portion 1b33 rotates for the movable jaw portion side closing portion due to the weight of the movable jaw portion side closing portion 1b33. It is configured to rotate counterclockwise (β direction) from the state shown in FIG. 5 around the shaft 1b32. Therefore, at the lower end of the movable jaw portion side hook plate 1b3, the lower end of the movable jaw portion side closing portion 1b33 is prevented from rotating counterclockwise (β direction) beyond the state shown in FIG. Further provided is a movable jaw portion side closing portion rotation stopper 1b36 that abuts on the portion and prevents the movable jaw portion side closing portion 1b33 from rotating excessively. The movable jaw portion side closing portion 1b33 is not the eccentricity of the movable jaw portion side closing portion rotating shaft 1b32 and its weight, but the movable jaw portion side connecting pin 2b that tends toward the movable jaw portion side pin accommodating portion 1b30. May be configured to rotate counterclockwise (β direction) by pushing the side of the movable jaw portion side closing portion 1b33 facing the movable closing portion side pin holding portion 1b33a.

Further, an engaging portion 1b35 that engages with the engaged portion 1a35 of the fixed jaw portion 1a is provided on the side surface of the movable jaw portion side closing portion 1b33 on the fixed jaw portion 1a side.

The engaging portion 1b35 of the movable jaw portion side closing portion 1b33 is the engaged portion 1a35 of the fixed jaw portion 1a and the movable jaw portion side closing portion 1b33 when the fixed jaw portion 1a and the movable jaw portion 1b are most closed. The movable jaw portion 1b is not separated from the fixed jaw portion 1a by engaging with the engaging portion 1b35, and the movable jaw portion 1b is maintained in a closed state, and the movable jaw portion side connecting pin 2b is on the movable closing portion side in order to attach the attachment 2. When a contact with the pin guide surface 1b33b or the movable jaw portion side connecting pin auxiliary guide plate 1b33c described later, the movable jaw portion side closing portion 1b33 was rotated clockwise (in the α direction) in FIG. 4 and engaged. The engaged portion 1a35 of the fixed jaw portion 1a and the engaging portion 1b35 of the movable jaw portion side closing portion 1b33 are disengaged, the movable jaw portion 1b opens with respect to the fixed jaw portion 1a, and the movable jaw portion side connecting pin 2b is moved. It is accommodated in the portion side pin accommodating portion 1b30 and is configured to be accommodated between the movable jaw portion side pin holding portion 1b31 and the movable closing portion side pin holding portion 1b33a. That is, the movable closing portion side pin guide surface 1b33b and the movable jaw portion side connecting pin auxiliary guide plate 1b33c are brought into contact with the movable jaw portion side connecting pin 2b so that the engaged portion 1a35 and the movable jaw portion side of the fixed jaw portion 1a come into contact with each other. It functions as a switch for releasing the engagement state of the closing portion 1b33 with the engaging portion 1b35.

The engaging portion 1b35 is formed in an L shape in a plan view as shown in FIG. 3 and the like, and as shown in FIG. 4, the movable jaw portion 1b is in a state where the fixed jaw portion 1a and the movable jaw portion 1b are most closed. If the side closing portion 1b33 rotates counterclockwise (β direction) and the engaging portion 1b35 provided on the movable jaw portion side closing portion 1b33 comes into contact with the engaged portion 1a35 of the fixed jaw portion 1a, the engaged portion 1a35 is elastically deformed and the engaging portion 1b35 provided on the movable jaw portion side closing portion 1b33 engages with the engaged portion 1a35 of the fixed jaw portion 1a, while the movable jaw portion side closing portion 1b33 rotates clockwise in that state. When rotated in the (α direction), the engaging portion 1b35 provided on the movable jaw portion side closing portion 1b33 is configured to be disengaged from the engaged portion 1a35 of the fixed jaw portion 1a.

Further, since the movable jaw portion 1b is provided with the movable jaw portion side connecting pin guide surface 1b39 disclosed in detail in Patent Document 5 (Japanese Patent No. 6430671), the movable jaw portion side closing portion 1b33 is movable. The movable jaw portion side connecting pin 2b abuts before the jaw portion side connecting pin guide surface 1b39, and the movable jaw portion side closing portion 1b33 is rotated clockwise (in the α direction) in FIG. 4 as described above to engage. The engaged portion 1a35 of the fixed jaw portion 1a and the engaging portion 1b35 of the movable jaw portion side closing portion 1b33 are removed to open the movable jaw portion 1b with respect to the fixed jaw portion 1a, and the movable jaw portion side. A movable jaw portion side connecting pin auxiliary guide plate 1b33c extending to the tip of the movable jaw portion side connecting pin guide surface 1b39 is attached so that the connecting pin 2b can be reliably guided to the movable closing portion side pin guide surface 1b33b.

<How to attach the attachment 2 using the attachment attachment jig 1 of the construction machine>
Next, using the attachment attachment jig 1 of the construction machine configured as described above, the attachment 2 to be connected to the fixed jaw portion side connecting pin 2a and the movable jaw portion side connecting pin 2b of the attachment 2 is attached. The method will be described.

First, in a state where the fixed jaw portion side connecting pin 2a and the movable jaw portion side connecting pin 2b are not connected to the attachment mounting jig 1, as shown in FIG. 4, the engaging portion provided on the movable jaw portion side closing portion 1b33. The 1b35 is engaged with the engaged portion 1a35 of the fixed jaw portion 1a, and the movable jaw portion 1b is maintained in a closed state with respect to the fixed jaw portion 1a.

Therefore, as will be described later, even if the pin spacing between the fixed jaw portion side connecting pin 2a and the movable jaw portion side connecting pin 2b is, for example, the minimum attachment 2 of about 320 mm, the movable jaw portion 1b opens with respect to the fixed jaw portion 1a. To prevent passing, insert the fixed jaw side hook plate 1a3 tip and the movable jaw side hook plate 1b3 tip between the fixed jaw side connecting pin 2a and the movable jaw side connecting pin 2b, and fix the jaw. The part-side connecting pin 2a can be brought into contact with the fixed closing-side connecting pin guide surface 1a33b of the fixed jaw-side closing portion 1a33, while the movable jaw-side connecting pin 2b is the movable jaw of the movable jaw-side closing portion 1b33. It can be brought into contact with the portion-side connecting pin auxiliary guide plate 1b33c or the movable closing portion-side connecting pin guide surface 1b33b.

Then, the work vehicle operates a construction machine such as a power shovel (not shown), and the engaging portion 1b35 of the movable jaw portion side closing portion 1b33 engages with the engaged portion 1a35 of the fixed jaw portion 1a, and Fixed jaw part side hook plate 1a3 tip part and movable jaw part side hook between the fixed jaw part side connecting pin 2a and the movable jaw part side connecting pin 2b in the state where the fixed jaw part 1a and the movable jaw part 1b are most closed. The tip of the plate 1b3 is inserted, and the fixed jaw side connecting pin 2a is brought into contact with the fixed closing side connecting pin guide surface 1a33b of the fixed jaw side closing part 1a33, while the movable jaw part side connecting pin 2b is the movable jaw part. The movable jaw portion side connecting pin auxiliary guide plate 1b33c of the side closing portion 1b33 or the movable closing portion side connecting pin guide surface 1b33b is brought into contact with each other.

When the fixed jaw portion side connecting pin 2a comes into contact with the fixed jaw portion side connecting pin guide surface 1a33b, the fixed jaw portion side closing portion 1a33 is counterclockwise (β direction) about the rotation shaft 1a32 for the fixed jaw portion side closing portion. ), The fixed jaw portion side connecting pin 2a is guided in the direction of the fixed jaw portion side pin accommodating portion 1a30.

When the fixed jaw portion side connecting pin 2a exceeds the corner portion which is the boundary portion between the fixed closing portion side connecting pin guide surface 1a33b and the fixed closing portion side pin holding portion 1a33a, the fixed jaw portion side closing portion 1a33 has its weight or The fixed jaw side connecting pin 2a rotates clockwise (α direction) around the fixed jaw side closing portion rotating shaft 1a32 by pushing the fixed jaw portion side closing portion 1a33 itself, and the fixed jaw portion side hook. Fixed jaw part side pin holding part 1a31 of plate 1a3 and fixed jaw part side closing part 1a33 fixed between fixed jaw part side pin holding part 1a33a The jaw part side connecting pin 2a is automatically fixed, that is, manually fixed by the operator. The jaw portion side closing portion 1a33 can be sandwiched without rotating or the like.

Work after sandwiching the fixed jaw side connecting pin 2a between the fixed jaw side pin holding portion 1a31 of the fixed jaw side hook plate 1a3 and the fixed closing side pin holding portion 1a33a of the fixed jaw portion side closing portion 1a33. The person inserts a removable lock pin (not shown) into the fixed jaw portion side lock pin insertion hole 1a34 so that the fixed jaw portion side closing portion 1a33 does not rotate arbitrarily.

On the other hand, when the movable jaw portion side connecting pin 2b comes into contact with the movable jaw portion side connecting pin auxiliary guide plate 1b33c of the movable jaw portion side closing portion 1b33 or the movable closing portion side connecting pin guide surface 1b33b, it is movable as shown in FIG. The jaw portion side closing portion 1b33 rotates counterclockwise (β direction), and the movable closing portion side pin guide surface 1b33b or the movable jaw portion side connecting pin auxiliary guide plate 1b33c is movable with the engaged portion 1a35 of the fixed jaw portion 1a. Since it functions as a switch for releasing the engagement state of the jaw portion side closing portion 1b33 with the engaging portion 1b35, the engagement of the movable jaw portion side closing portion 1b33 that was engaged with the engaged portion 1a35 of the fixed jaw portion 1a. The joint portion 1b35 is disengaged from the engaged portion 1a35 of the fixed jaw portion 1a, and as shown in FIG. 5, the engaging portion 1b35 of the movable jaw portion side closing portion 1b33 and the engaged portion 1a35 of the jaw portion 1a are not engaged. In this state, the movable jaw portion 1b opens with respect to the fixed jaw portion 1a.

Then, the movable jaw portion side connecting pin 2b abuts and is guided by the movable jaw portion side connecting pin guide surface 1b39 of the movable jaw portion 1b3, and the movable jaw portion side connecting pin 2b is fixed to the attachment 2 and therefore does not move. When the movable jaw portion 1b opens with respect to the fixed jaw portion 1a, it moves relatively in the direction of the movable jaw portion side pin accommodating portion 1b30 and comes into contact with the movable closing portion side pin guide surface 1b33b.

The guide operation of the movable jaw portion side connecting pin 2b by the movable jaw portion side connecting pin guide surface 1b39 of the movable jaw portion 1b3 is disclosed in detail in Patent Document 5 (Japanese Patent No. 6430671). Although a detailed explanation is omitted, even in the case of an attachment 2 such as a small bucket in which the pin spacing between the fixed jaw portion side connecting pin 2a and the movable jaw portion side connecting pin 2b is, for example, about 320 mm, the pin spacing is about 580 mm, for example. Even in the case of the attachment 2 such as the giant crusher of the above, the opening operation of the movable jaw portion 1b with respect to the fixed jaw portion 1a and its opening angle, etc. by the guiding operation of the movable jaw portion side connecting pin 2b by the movable jaw portion side connecting pin guide surface 1b39, etc. It is possible to connect in the same manner as described above only by operating the construction machine without providing a regulating mechanism such as a screw or a hydraulic cylinder to regulate the above and without bothering the operator.

When the movable jaw portion side connecting pin 2b comes into contact with the movable closing portion side pin guide surface 1b33b, the movable jaw portion side closing portion 1b33 is further rotated clockwise (α direction), and the movable closing portion side pin guide surface 1b33b is further rotated. When the corner portion that is the boundary between the movable jaw portion side pin holding portion 1b33a and the movable jaw portion side closing portion 1b33a is exceeded, the movable jaw portion side closing portion 1b33 pushes its weight or the movable jaw portion side connecting pin 2b pushes the movable jaw portion side closing portion 1b33 itself. As a result, it rotates counterclockwise (β direction) around the rotation shaft 1b32 for the movable jaw portion side closing portion, and the movable jaw portion side pin holding portion 1b31 and the movable jaw portion side closing of the movable jaw portion side hook plate 1b3. The movable jaw portion side connecting pin 2b can be automatically sandwiched between the movable closing portion side pin holding portion 1b33a of the portion 1b33, that is, the operator can manually sandwich the movable jaw portion side closing portion 1b33 without rotating or the like.

Work after sandwiching the movable jaw side connecting pin 2b between the fixed jaw side pin holding portion 1a31 of the movable jaw portion side hook plate 1b3 and the movable closing portion side pin holding portion 1b33a of the movable jaw portion side closing portion 1b33. The person inserts a removable lock pin (not shown) into the lock pin insertion hole 1b34 so that the movable jaw portion side closing portion 1b33 does not rotate arbitrarily.

With this, among the various attachments 2 attached by this construction machine, even if the pin spacing between the fixed jaw portion side connecting pin 2a and the movable jaw portion side connecting pin 2b is, for example, the minimum attachment 2 of about 320 mm, the movable jaw portion Since the engaging portion 1b35 provided on the side closing portion 1b33 engages with the engaged portion 1a35 of the fixed jaw portion 1a and the movable jaw portion 1b and the fixed jaw portion 1a are maintained in the most closed state, the worker can perform the operation. The attachment 2 can be attached without pressing the movable jaw portion 1b or the like.

<Main effects of the attachment mounting jig 1 of the construction machine of this embodiment>
As described above, in the attachment mounting jig 1 of the construction machine according to the embodiment of the present invention, the fixed jaw portion side closing portion 1a33 and the movable jaw portion side closing portion 1b33 are the fixed jaw portion 1a and the movable jaw portion 1b, respectively. When the fixed jaw portion side connecting pin 2a is accommodated in the fixed jaw portion side pin accommodating portion 1a30, the fixed jaw portion side closing portion 1a33 is supported by the fixed jaw portion side hook plate 1a3. A fixed jaw side pin holding portion 1a33a for sandwiching the fixed jaw side connecting pin 2a is provided between the fixed jaw portion side pin holding portion 1a31, and the fixed jaw portion side connecting pin 2a is used as the fixed jaw portion side pin accommodating portion 1a30. When the fixed jaw portion side connecting pin 2a comes into contact with the fixed jaw portion side connecting pin 2a, the fixed jaw portion side connecting pin 2a is opened and sandwiched between the fixed jaw portion side pin holding portion 1a31 and the fixed closing portion side pin holding portion 1a33a. While the fixed closing portion side connecting pin guide surface 1a33b for guiding to the state is provided, the movable jaw portion side closing portion 1b33 is movable when the movable jaw portion side connecting pin 2b is accommodated in the movable jaw portion side pin accommodating portion 1b30. A movable jaw portion side pin holding portion 1b35a for sandwiching the movable jaw portion side connecting pin 2b is provided between the movable jaw portion side pin holding portion 1b31 of the jaw portion side hook plate 1b3, and the movable jaw portion side connecting pin 2b is movable. When the movable jaw portion side connecting pin 2b comes into contact with the movable jaw portion side connecting pin 2b when it is not accommodated in the jaw portion side pin accommodating portion 1b30, the movable jaw portion side connecting pin 2b is opened and the movable closing portion side pin holding portion 1b33a and the movable closing portion side A pin guide surface 1b35b on the movable closing portion side that guides the pin to the pin holding portion 1b35a is provided.

Therefore, according to the attachment attachment jig 1 and the construction machine of the construction machine according to the embodiment of the present invention, the fixed jaw portion side connecting pin 2a and the movable jaw portion side connecting pin 2b provided at predetermined intervals on the attachment 2 side. And are moved to the fixed jaw side pin accommodating portion 1a30 of the fixed jaw portion 1a provided on the operating arm 3a side of the construction machine and the movable jaw portion side pin accommodating portion 1b30 of the movable jaw portion 1b, respectively. When sandwiching between the closed portion 1a33 and the movable jaw portion side closing portion 1b33, the worker can sandwich the fixed jaw portion side closing portion 1a33 and the movable jaw portion side closing portion 1b33 without manually operating.

In particular, in the attachment mounting jig 1 of the construction machine according to the present invention, the fixed jaw portion 1a is provided with the engaged portion 1a35, while the movable jaw portion side closing portion 1b33 is engaged with the fixed jaw portion 1a. An engaging portion 1b35 that engages with the joint portion 1a35 is provided, and when the fixed jaw portion 1a and the movable jaw portion 1b are most closed, the engaged portion 1a35 of the fixed jaw portion 1a and the movable jaw portion side closing portion are provided. The movable jaw portion 1b is not separated from the fixed jaw portion 1a by engaging with the engaging portion 1b35 provided on the 1b33, and the movable jaw portion 1b is maintained in a closed state, and the movable jaw portion side connecting pin 2b is a movable jaw portion side connecting pin. When the movable jaw portion side closing portion 1b33 is rotated clockwise (α direction) in contact with the auxiliary guide plate 1b33c or the movable closing portion side connecting pin guide surface 1b33b, the engaged fixed jaw portion 1a is engaged. The engaging portion 1a35 and the engaging portion 1b35 of the movable jaw portion side closing portion 1b33 are disengaged, the engaging state between the engaging portion 1b35 and the engaging portion 1a35 is released, and the movable jaw portion 1b is moved with respect to the fixed jaw portion 1a. It is configured to open.

Therefore, according to the attachment mounting jig 1 and the construction machine of the construction machine according to the present invention, the pin spacing between the fixed jaw portion side connecting pin 2a and the movable jaw portion side connecting pin 2b is, for example, the minimum of about 320 mm. Even when the attachment 2 is attached, the engaging portion 1b35 provided on the movable jaw portion side closing portion 1b33 engages with the engaged portion 1a35 of the fixed jaw portion 1a, and the movable jaw portion 1b and the fixed jaw portion 1a are most closed. Since the state is maintained, the attachment 2 can be attached without the worker holding down the movable jaw portion 1b.

Further, in the attachment mounting jig 1 of the construction machine according to the present invention, the movable jaw portion side closing portion 1b33 extends to the tip of the movable jaw portion side connecting pin guide surface 1a39 of the movable jaw portion side hook plate 1b3 and is movable. A movable jaw portion side connecting pin auxiliary guide plate 1b33c for guiding the jaw portion side connecting pin 2b to the movable closing portion side pin guide surface 1b33b is provided.

Therefore, according to the attachment mounting jig 1 of the construction machine according to the embodiment of the present invention, even when the movable jaw portion side connecting pin guide surface 1a39 is provided on the movable jaw portion side hook plate 1b3, the movable jaw portion side connecting pin guide is provided. The movable jaw side connecting pin auxiliary guide plate 1b33c extending to the tip of the surface 1a39 abuts on the movable jaw side connecting pin 2b before the movable jaw side connecting pin guide surface 1a39, and the movable jaw side closing portion 1b33 is shown in FIG. In, rotate clockwise (in the α direction) to remove the engaged portion 1a35 of the fixed jaw portion 1a and the engaging portion 1b35 of the movable jaw portion side closing portion 1b33 with respect to the fixed jaw portion 1a. The movable jaw portion 1b can be opened, and the movable jaw portion side connecting pin 2b can be reliably guided to the movable closing portion side pin guide surface 1b33b, so that the worker does not have to press the movable jaw portion 1b. The attachment 2 can be attached securely and easily.

Further, in the attachment mounting jig 1 of the construction machine according to the present invention, the fixed jaw portion 1a is more than a state in which the fixed jaw portion side connecting pin 2a is sandwiched between the fixed jaw portion side pin holding portion 1a31. The fixed jaw side closing portion 1a33 is provided with the fixed jaw portion side closing portion rotation stopper 1a36 to prevent the fixed jaw portion side closing portion 1a33 from rotating excessively, while the movable jaw portion 1b is between the movable jaw portion side pin accommodating portion 1b30. A movable jaw portion side closing portion rotation stopper 1b36 is provided to prevent the movable jaw portion side closing portion 1b33 from rotating excessively beyond the state in which the movable jaw portion side connecting pin 2b is sandwiched.

Therefore, according to the attachment mounting jig 1 and the construction machine of the construction machine according to the embodiment of the present invention, the fixed jaw portion side closing portion 1a33 and the movable jaw portion side closing portion 1b33 are prevented from being over-closed, so that the fixed jaw portion side is prevented. The connecting pin 2a and the movable jaw side connecting pin 2b are securely brought into contact with the fixed closing side connecting pin guide surface 1a33b and the movable closing side pin guide surface 1b35b, respectively, and are movable with the fixed jaw side pin accommodating portion 1a30. The jaw portion 1b can be moved to the movable jaw portion side pin accommodating portion 1b30 and securely sandwiched.

Further, in the attachment attachment jig 1 of the construction machine according to the present invention, the movable jaw portion of the movable jaw portion 1b is similar to the attachment attachment jig 1 of the construction machine disclosed in Patent Document 5 (Japanese Patent No. 6430671). Of the various attachments 2 provided on the outside of the opening of the side pin accommodating portion 1b30 and attached by a construction machine, the movable jaw portion side connection with the minimum pin spacing between the fixed jaw portion side connecting pin 2a and the movable jaw portion side connecting pin 2b is provided. With the movable jaw part side connecting pin guide surface 1a39 that also contacts the pin 2b and the maximum movable jaw part side connecting pin 2b and guides the movable jaw part side connecting pin 2b until it is accommodated in the movable jaw part side pin accommodating part 1b30. After accommodating the fixed jaw side connecting pin 2a in the fixed jaw side pin accommodating portion 1a30 of the fixed jaw portion 1a, the movable jaw portion 1b is brought closer to the movable jaw portion side connecting pin 2b by the operation of the hydraulic cylinder of the construction machine or the like. When accommodating the movable jaw portion side connecting pin 2b in the movable jaw portion side pin accommodating portion 1b30 of the movable jaw portion 1b, among various attachments 2, the fixed jaw portion side connecting pin 2a and the movable jaw portion side connecting pin 2b Even with the movable jaw part side connecting pin 2b with the minimum pin spacing and the maximum movable jaw part side connecting pin 2b, the movable jaw part side connecting pin 2b is fixed so that the movable jaw part side connecting pin guide surface 1a39 abuts. When the movable jaws 1b are too open and the movable jaws 1b are too open, the movable jaws 1b are in contact with each other to prevent the movable jaws 1b from being over-closed. It has a jaw-to-jaw over-opening prevention portion 1e and the like to prevent over-opening of 1b.

Therefore, the attachment mounting jig 1 of the construction machine of the present embodiment does not require a regulation mechanism such as a screw or a hydraulic cylinder 3b that regulates the opening operation of the movable jaw portion 1b with respect to the fixed jaw portion 1a and the opening angle thereof, thus reducing the cost. At the same time, it is possible to reliably prevent the connecting pin from coming off from the fixed jaw portion 1a and the movable jaw portion 1b, and the connecting pin can be accommodated in each of the pin accommodating portions of the fixed jaw portion 1a and the movable jaw portion 1b.

In the description of the above embodiment, the attachment attachment jig of the construction machine of Patent Document 5 (Patent No. 6430671) in which the movable jaw portion side connecting pin guide surface 1a39 and the like are provided on the movable jaw portion side hook plate 1b3 is used as a base. As described above, the present invention can also be applied to an attachment mounting jig for construction machinery in which the movable jaw portion side hook plate 1b3 is not provided with the movable jaw portion side connecting pin guide surface 1a39. In this case, the fixed jaw portion 1a side. Similarly, the movable jaw portion side connecting pin auxiliary guide plate 1b33c may be omitted.

Further, in the description of the above embodiment, the fixed jaw portion 1a is provided with the engaged portion 1a35, while the movable jaw portion side closing portion 1b33 is provided with the engaging portion 1b35, but the present invention is not limited to this. While the engaging portion 1a35 is provided on the fixed jaw portion 1a side, the engaged portion 1a35 may be provided on the movable jaw portion side closed portion 1b33 side, and the shapes of the engaging portion 1b35 and the engaged portion 1a35 are also described above. The present invention is not limited to that of the embodiment, and the fixed jaw portion 1a and the movable jaw portion 1b are maintained in the most closed state, and the movable jaw portion side connecting pin 2b is the movable jaw portion side closed portion 1b33. The engagement between the engaging portion 1b35 and the engaged portion 1a35 when the movable jaw portion side closing portion 1b33 abuts on the movable jaw portion side connecting pin auxiliary guide plate 1b33c or the movable closing portion side connecting pin guide surface 1b33b and rotates. Since it is sufficient if the configuration is such that the engaged portion is released, a strong electromagnet or the like can also be used as the engaging portion 1b35 and the engaged portion 1a35.

Further, in the description of the above embodiment, the fixed jaw portion 1a side is provided with the jaws over-close prevention portion 1d and the fixed jaw portion side closing portion rotation stopper 1a36, while the movable jaw portion 1b side is provided with the jaws over-opening prevention portion. Although 1e and the movable jaw portion side closing portion rotation stopper 1b36 have been described, in the present invention, the jaws over-closing prevention portion 1d, the fixed jaw portion side closing portion rotation stopper 1a36, and the jaws over-opening prevention portion 1e The shape and installation location of the movable jaw portion side closing portion rotation stopper 1b36 are not limited to those of the above embodiment, and for example, the fixed jaw portion side closing portion rotation stopper 1a36 is used as a movable jaw portion side closing portion rotation stopper. It may be formed in a cubic shape such as 1b36, or the movable jaw portion side closing portion rotating stopper 1b36 may be formed in a cylindrical shape such as the fixed jaw portion side closing portion rotating stopper 1a36, and the installation location may be changed. It may be changed, and the installation positions of the jaw-to-jaw over-close prevention unit 1d and the jaw-to-jaw over-opening prevention unit 1e may be changed as described in the attachment attachment jig for construction machinery of Patent Document 5 (Japanese Patent No. 6430671). It may be changed to the installation position, and these jaws over-close prevention part 1d and fixed jaw part side closing part rotation stopper 1a36, jaws over-opening prevention part 1e and movable jaw part side closing part rotation stopper 1b36 And may be omitted.

Further, in the attachment mounting jig 1 of the above-described embodiment, the fixed jaw portion 1a and the movable jaw portion 1b are such that the jaw portions rotating shafts 1c passed through the rotating bearing portions 1a4, 1a4, 1b4, 1b4. Although the three-axis type has been described so as to rotate around the center to open and close, the present invention is not limited to this, and for example, as shown in FIGS. 6 and 7, the jaw portions rotation shaft 1c is omitted. It can also be applied to shaft type attachment mounting jigs 1', 1 ".

For example, in the case of the attachment mounting jig 1'shown in FIG. 6, the movable jaw side rotation shaft 3c1 on the movable jaw portion 1b'side is shared as a rotation shaft between the jaw portions. Therefore, the jaw portions of the fixed jaw portion 1a'are formed so as to extend to the movable jaw side rotary bearing portion 1b5 (see FIG. 3), and the jaw portions of the fixed jaw portion 1a' are formed to extend to each other. The movable jaw side rotating shaft 3c1 passed through the movable jaw side rotating bearing portion 1b5 (see FIG. 3) of 1a4'and the movable jaw portion 1b' serves as a rotating shaft between the jaw portions and becomes a movable jaw side rotating shaft. The movable jaw portion 1b'operates so as to open with respect to the fixed jaw portion 1a'centering on 3c1. The other configurations and operations are the same as those of the attachment mounting jig 1 shown in FIGS. 1 to 5.

On the other hand, in the case of the attachment mounting jig 1 "shown in FIG. 7, the fixed jaw side rotating shaft 3a1 on the fixed jaw portion 1a" side is shared as a rotating shaft between the jaw portions. Therefore, the jaw portions of the movable jaw portion 1b "are formed so as to extend to the fixed jaw side rotary bearing portion 1a5, and the jaw portions of the movable jaw portion 1b" are fixed to the rotary bearing portion. The fixed jaw side rotating shaft 3a1 passed through the fixed jaw side rotating bearing portion 1a5 of the jaw portion 1a "becomes a rotating shaft between the jaw portions, and is fixed around the fixed jaw side rotating shaft 3a1 to the fixed jaw portion 1a". On the other hand, the movable jaw portion 1b "operates so as to open. Other configurations and operations are the same as in the case of the attachment mounting jig 1'shown in FIG. 6, with the attachment mounting jig 1 shown in FIGS. 1 to 5. The same is true.

1,1', 1 "Attachment mounting jig 1a, 1a', 1a" Fixed jaw part 1a1 Fixed side connecting plate 1a2 Fixed side horizontal board 1a3 Fixed jaw part side hook plate 1a30 Fixed jaw part side Pin accommodating part 1a31 Fixed jaw part side Pin holding part 1a32 Rotating shaft for fixed jaw part side closing part 1a33 Fixed jaw part side closing part 1a34 Fixed jaw part side lock pin insertion hole 1a35 Engagement part 1a36 Fixed jaw part side closing part Rotating stopper 1a4, 1a4 jaw part Mutual rotating bearing part 1a5, 1a5 Fixed jaw side rotating bearing part 1b, 1b', 1b "Movable jaw part 1b1 Movable side connecting part 1b2 Slide board 1b3 Movable jaw part side hook plate 1b30 Movable jaw part side pin accommodating part 1b31 Movable Jaw side pin holding part 1b32 Movable jaw part side closing part Rotating shaft 1b33 Movable jaw part side closing part 1b34 Movable jaw part side lock pin insertion hole 1b35 Engagement part 1b36 Movable jaw part side closing part Rotating stopper 1b39 Movable Jaw-side connecting pin guide surface 1c Jaw-to-chin rotation shaft 1d Jaw-to-jaw over-close prevention part 1e Jaw-to-jaw over-opening prevention part 2 Attachment 2a Fixed jaw-side connecting pin 2b Movable jaw-side connecting pin 3a Activating arm 3a1 Fixed jaw Side rotation shaft 3b Bucket cylinder 3b1 Piston 3c Movable jaw connection link 3c1 Movable jaw side rotation shaft 3d Arm link

Claims (5)

The fixed jaw side connecting pin and the movable jaw side connecting pin provided at various attachments such as buckets at predetermined intervals are attached to the tip of the operating arm of a construction machine such as a power shovel. It is accommodated in the side pin accommodating portion and the movable jaw portion side pin accommodating portion of the movable jaw portion attached to the tip of the piston that expands and contracts from the bucket cylinder provided on the operating arm of the construction machine via the movable jaw connecting link. After that, the opening of the fixed jaw side pin accommodating portion and the opening of the movable jaw portion side pin accommodating portion are closed by the fixed jaw portion side closing portion and the movable jaw portion side closing portion, respectively, and the attachment is attached. Machine attachment mounting jig
The fixed jaw portion side closing portion and the movable jaw portion side closing portion are rotatably supported by the fixed jaw portion and the movable jaw portion, respectively.
When the fixed jaw portion side connecting pin is accommodated in the fixed jaw portion side pin accommodating portion, the fixed jaw portion side closing portion is connected to the fixed jaw portion side pin holding portion of the fixed jaw portion. When the fixed closing portion side pin holding portion for sandwiching the portion side connecting pin is provided and the fixed jaw portion side connecting pin comes into contact with the fixed jaw portion side pin accommodating portion when it is not accommodated in the fixed jaw portion side pin accommodating portion. A fixed closing portion side connecting pin guide surface is provided which is rotated so as to open the fixed jaw portion side closing portion and guides the fixed jaw portion side connecting pin so as to be accommodated in the fixed jaw portion side pin accommodating portion. On the other hand
When the movable jaw portion side connecting pin is accommodated in the movable jaw portion side pin accommodating portion, the movable jaw portion side closing portion is connected to the movable jaw portion side holding portion of the movable jaw portion. Movable closing portion that sandwiches the side connecting pin When the side pin holding portion is provided and the movable jaw portion side connecting pin comes into contact with the movable jaw portion side pin accommodating portion when it is not accommodated, the movable jaw portion side connecting pin is movable. A movable closing portion side pin guide surface is provided that rotates the jaw portion side closing portion so as to open and guides the movable jaw portion side connecting pin so that the movable jaw portion side connecting pin is accommodated in the movable jaw portion side pin accommodating portion. Attachment mounting jaws for construction machinery featuring. In the attachment mounting jig for construction machinery according to claim 1,
The fixed jaw portion is provided with an engaged portion, while the movable jaw portion side closing portion is provided with an engaging portion that engages with the engaged portion of the fixed jaw portion. When the fixed jaw portion and the movable jaw portion are most closed, the engaged portion of the fixed jaw portion and the engaging portion of the movable jaw portion side closing portion engage with each other with respect to the fixed jaw portion. Maintaining a closed state in which the movable jaw portion does not separate by itself,
When the movable jaw portion side closing portion is rotated so that the movable jaw portion side connecting pin is accommodated in the movable jaw portion side pin accommodating portion, the engaged portion of the fixed jaw portion and the movable portion are engaged. An attachment attachment jig for a construction machine, characterized in that the movable jaw portion is configured to be disengaged from the engaging portion of the jaw portion side closing portion and the movable jaw portion is opened with respect to the fixed jaw portion. In the attachment mounting jig of the construction machine according to claim 1 or 2.
A construction machine characterized in that the movable jaw portion side closing portion is provided with a movable jaw portion side connecting pin auxiliary guide plate for guiding the movable jaw portion side connecting pin to the movable jaw portion side pin guide surface. Attachment mounting jig. In the attachment mounting jig for construction machinery according to any one of claims 1 to 3.
Among the various attachments provided on the outside of the opening of the movable jaw portion side pin accommodating portion of the movable jaw portion and attached by the construction machine, the pin spacing between the fixed jaw portion side connecting pin and the movable jaw portion side connecting pin is the smallest. Movable jaw side connecting pin guide that also contacts the movable jaw part side connecting pin and the maximum movable jaw part side connecting pin to guide the movable jaw part side connecting pin until it is accommodated in the movable jaw part side pin accommodating part. Face and
After accommodating the fixed jaw portion side connecting pin in the fixed jaw portion side pin accommodating portion of the fixed jaw portion, the movable jaw portion is brought closer to the movable jaw portion side connecting pin by the operation of the hydraulic cylinder or the like of the construction machine. When the movable jaw portion side connecting pin is accommodated in the movable jaw portion side pin accommodating portion of the movable jaw portion, among the various attachments attached by the construction machine, the fixed jaw portion side connecting pin and the movable jaw portion side connecting pin Even in the movable jaw portion side connecting pin having the minimum pin spacing and the movable jaw portion side connecting pin having the maximum pin spacing, the movable jaw portion side connecting pin is contacted with the movable jaw portion side connecting pin guide surface with respect to the fixed jaw portion. The jaws that prevent the movable jaws from closing too much, and the jaws that prevent the jaws from closing too much,
Attachment mounting jig for construction machinery, characterized by having. A construction machine comprising the attachment attachment jig for the construction machine according to claim 1 to 4.

Images