JP3232525U - Construction Machinery Attachment Mounting Jigs and Construction Machinery - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an attachment mounting jig for a construction machine capable of easily executing an attachment mounting work. SOLUTION: A fixed jaw side pin accommodating portion 1a30 and a movable jaw side pin accommodating portion 1b30 are opened so as to accommodate a fixed jaw side connecting pin and a movable jaw side connecting pin from the same side, respectively. The side closing body 1a33 and the movable jaw side closing body 1b33 are rotatably supported by the fixed jaw body 1a and the movable jaw body 1b, and the fixed jaw side connecting pin is closed on the fixed jaw side closing body on the fixed jaw side closing body. The body pin contact portion 1a33c is pushed and rotated to sandwich the fixed jaw side connecting pin, while the movable jaw side connecting pin is in contact with the movable jaw side closed body pin on the movable jaw side closed body. The part is pushed and rotated so as to sandwich the movable jaw side connecting pin. [Selection diagram] Fig. 2

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 mounting jig for construction machines such as power shovels, a fixed jaw body with one end open and a movable jaw body are engaged with two connecting pins provided at a predetermined interval in an attachment such as a bucket. After that, a mechanism for urging the movable jaw body to separate from the fixed jaw body by a restricting material and a coil spring (see, for example, Patent Document 1), or a mechanism for driving the screw or the like to fix the movable jaw body. A mechanism for urging the movable jaw body away from the fixed jaw body by a dedicated bucket cylinder (see, for example, Patent Document 3) or a mechanism for urging the movable jaw body away from the fixed jaw body (see, for example, Patent Document 3). It has also been proposed that the pin accommodating portions of the movable jaw body and the fixed jaw body are closed by the fixed jaw side closed body and the movable jaw side closed body (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 side connecting pins and movable jaw side connecting pins provided at predetermined intervals in various attachments such as buckets are constructed. After moving to the fixed jaw side pin housing part of the fixed jaw body attached to the tip of the operating arm of the machine and the movable jaw side pin housing part of the movable jaw body, the worker closes the fixed jaw side and the movable jaw side. It is necessary to manually rotate each of the body to sandwich the fixed jaw side connecting pin and the movable jaw side connecting pin, and there is 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 of the construction machine described in Patent Documents 1 to 3 described above, after engaging the connecting pin with the fixed jaw body and the movable jaw body which are open at one end, the restricting material and the coil spring, the screw, or the screw Since a regulation mechanism is required to urge the movable jig body to separate from the fixed jig body 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 side connecting pin and the movable jaw side connecting pin provided at predetermined intervals on the attachment side are respectively provided on the operating arm side of the construction machine. When the fixed jaw side pin housing and the movable jaw side pin housing of the movable jaw body are moved to the fixed jaw body and the fixed jaw side closed body and the movable jaw side closed body are closed and pinched, the worker is fixed. It is an object of the present invention to provide a construction machine attachment attachment jig and a construction machine capable of sandwiching a jaw-side closed body and a movable jaw-side closed body without manual operation.

In order to solve the above problems, the attachment mounting jig for the construction machine according to the present invention has a fixed jaw side connecting pin and a movable jaw side connecting pin provided at predetermined intervals on various attachments such as a bucket, respectively, as an operating arm of the construction machine. A movable jaw body attached to a fixed jaw side pin accommodating portion of a fixed jaw body attached to the tip portion and a piston tip portion extending and contracting from a bucket cylinder provided on the operating arm of the construction machine via a piston side link. After accommodating in the movable jaw side pin accommodating portion, the opening of the fixed jaw side pin accommodating portion and the opening of the movable jaw side pin accommodating portion are fixed by the fixed jaw side closed body and the movable jaw side closed body, respectively. An attachment mounting jig for a construction machine that is closed to attach an attachment, and the fixed jaw side pin accommodating portion and the movable jaw side pin accommodating portion have the fixed jaw side connecting pin and the movable jaw side connecting pin on the same side, respectively. The fixed jaw side closed body and the movable jaw side closed body are rotatably supported by the fixed jaw body and the movable jaw body, respectively, and the fixed jaw side closed body and the movable jaw side closed body are rotatably supported by the fixed jaw body. In the side closed body, when the fixed jaw side connecting pin is accommodated in the fixed jaw side pin accommodating portion, the fixed jaw side connecting pin that tends toward the fixed jaw side pin accommodating portion accommodates the fixed jaw side pin. The fixed jaw side closed body pin that is exposed to the portion is pushed and rotated to sandwich the fixed jaw side connecting pin with the fixed jaw side pin holding portion of the fixed jaw body. On the other hand, the movable jaw-side closed body is provided with a portion, and when the movable jaw-side connecting pin is accommodated in the movable jaw-side pin accommodating portion, the movable jaw-side closed body tends to face the movable jaw-side pin accommodating portion. The movable jaw side connecting pin pushes and rotates the movable jaw side closed body pin contact portion exposed to the movable jaw side pin accommodating portion, and the movable jaw side connection with the movable jaw side pin holding portion of the movable jaw body. It is characterized in that a movable jaw side closed body pin holding portion for holding the pin is provided.
Further, in the attachment mounting jig of the construction machine according to the present invention, the fixed jaw body is rotatably connected to the operating arm-side rotating shaft at the tip of the operating arm and the piston-side rotating shaft at the tip of the piston-side link. On the other hand, the movable jaw body is also characterized in that it is rotatably connected to the fixed jaw body and the piston side link via a piston side rotation shaft at the tip of the piston side link.
Further, in the attachment mounting jig of the construction machine according to the present invention, the movable jaw side pin is accommodated in the movable jaw side pin accommodating portion before and after the movable jaw side pin accommodating portion in the movable jaw body, respectively. It is also characterized in that a pin guide surface that is inclined so as to be lowered in the horizontal direction as the distance from the movable jaw side pin accommodating portion is provided in the absence state.
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 side pin accommodating portion and the movable jaw side pin accommodating portion accommodate the fixed jaw side connecting pin and the movable jaw side connecting pin from the same side, respectively. The fixed jaw side closed body and the movable jaw side closed body are rotatably supported by the fixed jaw body and the movable jaw body, respectively. When accommodating the fixed jaw side connecting pin in the pin accommodating portion, the fixed jaw side connecting pin that tends toward the fixed jaw side pin accommodating portion is exposed to the fixed jaw side pin accommodating portion in the fixed jaw side closed body. A fixed jaw side closed body pin holding part is provided to hold the fixed jaw side connecting pin between the fixed jaw side pin holding part and the fixed jaw side pin holding part by pushing and rotating the closed body pin contact portion, and the movable jaw side closed body is provided. When the movable jaw side connecting pin is accommodated in the movable jaw side pin accommodating portion, the movable jaw side connecting pin that tends toward the movable jaw side pin accommodating portion is the movable jaw side pin accommodating portion in the movable jaw side closed body. A movable jaw side closed body pin holding part is provided to hold the movable jaw side connecting pin between the movable jaw side closed body pin holding part and the movable jaw side closed body pin holding part that is exposed to the movable jaw side by pushing and rotating the pin contact portion. ing.
Therefore, according to the attachment mounting jig and the construction machine of the construction machine according to the present invention, the fixed jaw side connecting pin and the movable jaw side connecting pin provided on the attachment side are respectively provided on the operating arm side of the construction machine. When the fixed jaw side pin accommodating part of the body and the movable jaw side pin accommodating part of the movable jaw body are moved to close and pinch the fixed jaw side closed body and the movable jaw side closed body, the worker holds the fixed jaw side closed body. It is possible to hold the movable jaw side closed body without manually operating it, and it is possible to easily attach the attachment.

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 front view of the attachment attachment jig of the construction machine of embodiment which concerns on this invention. It is a right side view of the attachment attachment jig of the construction machine of embodiment which concerns on this invention. It is a left side view of the attachment attachment jig of the construction machine of embodiment which concerns on this invention. FIG. 5 is an enlarged front view of a main part showing a state in which the fixed jaw body of the attachment mounting jig of the construction machine according to the present invention is connected to the fixed jaw side connecting pin on the attachment side where the pin spacing is narrow. After being connected to the piston-side rotating shaft on the attachment side with a narrow pin spacing by the fixed jaw body of the attachment mounting jig of the construction machine according to the present invention, it was connected to the piston-side rotating shaft on the attachment side by the movable ago body. It is the enlarged front view of the main part which shows the state. FIG. 5 is an enlarged front view of a main part showing a state in which the fixed jaw body of the attachment mounting jig of the construction machine according to the present invention is connected to the fixed jaw side connecting pin on the attachment side having a wide pin spacing. After being connected to the piston-side rotating shaft on the attachment side with a wide pin spacing by the fixed jaw body of the attachment mounting jig of the construction machine according to the present invention, it was connected to the piston-side rotating shaft on the attachment side by the movable ago body. It is the enlarged front view of the main part which shows the state.

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 is specified at the rear portion of various attachments 2 such as a bucket, a hammer, a crusher (crusher), and a skeleton bucket (sieving bucket). The fixed jaw side connecting pin 2a and the movable jaw side connecting pin 2b provided at intervals are engaged with the fixed jaw body 1a and the movable jaw body 1b, respectively, to attach the attachment 2. Work up to the engagement work between the fixed jaw side connecting pin 2a and the movable jaw side connecting pin 2b before inserting the lock pin (not shown) into the lock pin insertion hole 1a34 and the movable jaw side lock pin insertion hole 1b34. It is configured so that the staff can do it while riding on the construction machine.

In FIG. 1, in 3d, the base end portion is rotatably connected to the operating arm 3a, while the tip end portion is connected to the tip end portion of the piston 3b1 that expands and contracts from the bucket cylinder 3b and the base end portion of the piston side link 3c. It is an arm link that is rotatably connected. Further, the configuration and connection structure of the attachment 2 other than the attachment attachment jig 1, the operating arm 3a, the bucket cylinder 3b, the piston side 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 4, the attachment mounting jig 1 of the embodiment according to the present invention is via the operating arm side rotating shaft 3a1 at the tip of the operating arm 3a and the piston side rotating shaft 3c1 at the tip of the piston side link 3c. A fixed jaw body 1a whose both ends are rotatably connected to each other and a movable jaw body 1b rotatably connected via a piston side rotation shaft 3c1 at the tip of the piston side link 3c are provided and fixed. The jaw body 1a is configured to be connected to the fixed jaw side connecting pin 2a, while the movable jaw body 1b is configured to be connected to the movable jaw side connecting pin 2b.

Here, in the attachment mounting jig 1 of the embodiment according to the present invention, both ends of the fixed jaw body 1a are connected to the operating arm side rotating shaft 3a1 and the piston side rotating shaft 3c1 even when they are not connected to the attachment 2. Since they are connected, a stable state such as a stable posture or angle is maintained, whereas when the movable ago body 1b is not connected to the attachment 2, the piston side rotation shaft 3c1 at the tip of the piston side link 3c is connected. Since it is only rotatably connected to the tip of the piston side link 3c via the piston side, it is unstable (free) that freely rotates clockwise or counterclockwise with the piston side rotation shaft 3c1 as the rotation axis. It is in a state.

(Fixed jaw body 1a)
As shown in FIGS. 1 to 4, the fixed jaw body 1a is rotatably connected to the tip end portion of the operating arm 3a of the construction machine via the operating arm side rotating shaft 3a1 at the rear end portion. On the other hand, the tip portion has a pair of fixed-side connecting plates 1a1, 1a1 rotatably connected to the tip of the piston-side link 3c via a piston-side rotating shaft 3c1, and the fixed-side connecting plate 1a1, 1a1 is provided. A pair of fixed jaw-side hook plates 1a3 and 1a3 are provided at the lower ends of the plates 1a1 and 1a1 via the fixed-side horizontal substrate 1a2. Therefore, as shown in FIGS. 2 and 3, the fixed jaw body 1a is provided with an annular operating arm-side rotating bearing portion 1a5, 1a5 that supports the operating arm-side rotating shaft 3a1 and operates. Each of the arm-side rotary bearing portions 1a5 and 1a5 is provided with a through hole through which a retaining pin 1a6 is inserted so that the actuating arm-side rotary shaft 3a1 does not come off.

As shown in FIGS. 1 to 4, each of the pair of fixed jaw side hook plates 1a3 and 1a3 has one end open to engage with the fixed jaw side connecting pin 2a and corresponds to the outer peripheral surface of the fixed jaw side connecting pin 2a. A fixed jaw side pin holding portion 1a31 for forming a fixed jaw side pin accommodating portion 1a30 having a substantially semi-arc shape is provided, and a fixed jaw side closed body is provided between a pair of fixed jaw side hook plates 1a3 and 1a3. It is rotatably provided via the rotation shaft 1a32, and after the fixed jaw side connecting pin 2a is accommodated in the fixed jaw side pin accommodating portion 1a30, the opening side of the fixed jaw side pin accommodating portion 1a30 is closed to close the fixed jaw. A fixed jaw-side closed body 1a33 that sandwiches the side connecting pin 2a and prevents it from falling off is provided.

Here, the fixed jaw side pin accommodating portion 1a30 is opened so that the fixed jaw side connecting pin 2a accommodates the movable jaw side pin accommodating portion 1b30 from the right direction in FIGS. 1 and 2 in the same manner as the movable jaw side pin accommodating portion 1b30.

The fixed jaw side closing body 1a33 is formed in a substantially arcuate cross section corresponding to the outer peripheral surface of the fixed jaw side connecting pin 2a, and when closed, the fixed jaw side connecting pin 2a is formed between the fixed jaw side connecting pin 2a and the fixed jaw side pin holding portion 1a31. The fixed jaw side closing body pin holding portion 1a33a is provided, and the fixed jaw side connecting pin 2a hits the fixed jaw side connecting pin 2a before the fixed jaw side connecting pin 2a is accommodated and sandwiched in the fixed jaw side pin accommodating portion 1a30. When in contact, the fixed jaw side closing body 1a33 is rotated counterclockwise (β direction) to guide the fixed jaw side connecting pin 2a to the fixed jaw side pin accommodating portion 1a30. Is provided.

Further, the fixed jaw side closed body 1a33 is exposed to the fixed jaw side pin accommodating portion 1a30 before accommodating the fixed jaw side connecting pin 2a in the fixed jaw side pin accommodating portion 1a30, and the fixed jaw side pin accommodating portion 1a30. When accommodating the fixed jaw side connecting pin 2a in the accommodating portion 1a30, the fixed jaw side connecting pin 2a that tends toward the fixed jaw side pin accommodating portion 1a30 abuts and pushes to push the fixed jaw side closing body 1a33 clockwise ( Rotate in the α direction) to sandwich the fixed jaw side connecting pin 2a between the fixed jaw side pin holding portion 1a31 of the fixed jaw body 1a3 and the fixed jaw side closing body 1a33 of the fixed jaw side closing body 1a33. A closed body pin contact portion 1a33c is provided.

As a result, in the attachment mounting jig 1 of the embodiment according to the present invention, after the fixed jaw side connecting pin 2a is accommodated in the fixed jaw side pin accommodating portion 1a30, the worker manually rotates the fixed jaw side closed body 1a33. The fixed jaw side connecting pin 2a facing the fixed jaw side pin accommodating portion 1a30 is exposed to the fixed jaw side pin accommodating portion 1a30 without sandwiching the fixed jaw side connecting pin 2a. By pushing the fixed jaw side closed body pin contact portion 1a33c in contact with the fixed jaw side closed body 1a33, the fixed jaw side closed body 1a33 is rotated clockwise (α direction) with the fixed jaw side pin holding portion 1a31 of the fixed jaw body 1a3. Since the fixed jaw side connecting pin 2a can be sandwiched between the fixed jaw side closing body 1a33 and the fixed jaw side closing body 1a33, the fixed jaw side connecting pin 2a is attached to the fixed jaw side pin accommodating portion 1a30 as in the prior art. It is not necessary for the worker to manually rotate the fixed jaw side closing body 1a33 or the like to pinch the fixed jaw side connecting pin 2a after accommodating the fixed jaw side, and the work efficiency can be improved.

Further, as shown in FIG. 5 and the like, the fixed jaw side closing body 1a33 closes the opening side of the fixed jaw side pin accommodating portion 1a30 and sandwiches the fixed jaw side connecting pin 2a on the pair of fixed jaw side hook plates 1a3 and 1a3. After that, the fixed jaw side lock pin insertion holes 1a34, 1a34 and the like are provided so that a removable lock pin (not shown) is inserted so that the fixed jaw side closed body 1a33 does not rotate arbitrarily.

In the state before the fixed jaw side connecting pin 2a is sandwiched between the pair of fixed jaw side hook plates 1a3 and 1a3 and the fixed jaw side closing body 1a33, the fixed jaw side closing body 1a33 is for the fixed jaw side closing body. As shown in FIG. 2, the rotating shaft 1a32 is stable in a state where the fixed jaw side closed body pin contact portion 1a33c is exposed to the fixed jaw side pin accommodating portion 1a30 due to its own weight, but the fixed jaw side closed body 1a33 A part of the upper part is exposed to the fixed jaw side lock pin insertion holes 1a34 and 1a34.

(Movable jaw body 1b)
As shown in FIGS. 1, 4 and 5, the movable jaw body 1b is rotatably provided on the piston side rotation shaft 3c1 that rotatably connects the tip end of the piston side link 3c and the tip end side of the fixed jaw body 1a. The annular piston-side rotary bearing portions 1b5 and 1b5 that support the piston-side rotary shaft 3c1 are provided, and the piston-side rotary bearing portions 1b5 and 1b5 are respectively provided with piston-side rotary bearing portions 1b5 and 1b5. A through hole is provided so as to insert a retaining pin (not shown) so that the shaft 3c1 does not come off, and a pair of movable jaw side hook plates 1b3 are provided via the movable side horizontal substrate 1b2. , 1b3 are provided.

As shown in the above, the pair of movable jaw-side hook plates 1b3 and 1b3 have a half-circle in cross section corresponding to the outer peripheral surface of the movable jaw-side connecting pin 2b with one end open to sandwich the movable jaw-side connecting pin 2b. The movable jaw side pin holding portion 1b31 forming the arc-shaped movable jaw side pin accommodating portion 1b30 and the movable jaw side hook plate 1b3 are rotatably provided via the movable jaw side closing body rotating shaft 1b32. After accommodating the side connecting pin 2b in the movable jaw side pin accommodating portion 1b30, the movable jaw side closing body that closes the opening side of the movable jaw side pin accommodating portion 1b30 to sandwich the movable jaw side connecting pin 2b and prevent it from falling off. It is equipped with 1b33.

Here, the movable jaw side pin accommodating portion 1b30 is opened so that the movable jaw side connecting pin 2b accommodates the movable jaw side connecting pin 2b from the right direction in FIGS. 1 and 2 in the same manner as the fixed jaw side pin accommodating portion 1a30. That is, the fixed jaw side pin accommodating portion 1a30 and the movable jaw side pin accommodating portion 1b30 are opened so as to accommodate the fixed jaw side connecting pin 2a and the movable jaw side connecting pin 2b, respectively.

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

Further, the movable jaw side closed body 1b33 is exposed to the movable jaw side pin accommodating portion 1b30 before accommodating the movable jaw side connecting pin 2b in the movable jaw side pin accommodating portion 1b30, and the movable jaw side pin accommodating portion 1b30. When accommodating the movable jaw side connecting pin 2b in the accommodating portion 1b30, the movable jaw side connecting pin 2b attempting to face the movable jaw side pin accommodating portion 1b30 abuts and pushes to rotate the movable jaw side closed body 1b33 clockwise ( The movable jaw side connecting pin 2b is sandwiched between the movable jaw side pin holding portion 1b31 of the movable jaw body 1b3 and the movable jaw side closing body 1b33 of the movable jaw side closing body 1b33 by rotating in the α direction). A closed body pin contact portion 1b33c is provided.

As a result, in the attachment mounting jig 1 of the embodiment according to the present invention, after the movable jaw side connecting pin 2b is accommodated in the movable jaw side pin accommodating portion 1b30, the worker manually rotates the movable jaw side closing body 1b33. The movable jaw side connecting pin 2b toward the movable jaw side pin accommodating portion 1b30 is exposed to the movable jaw side pin accommodating portion 1b30 without sandwiching the movable jaw side connecting pin 2b. By pushing the movable jaw side closed body pin contact portion 1b33c in contact with the movable jaw side closed body 1b33c, the movable jaw side closed body 1b33 is rotated clockwise (α direction) with the movable jaw side pin holding portion 1b31 of the movable jaw body 1b3. Since the movable jaw side connecting pin 2b can be sandwiched between the movable jaw side closing body 1b33 and the movable jaw side closing body 1b33, the movable jaw side connecting pin 2b is attached to the movable jaw side pin accommodating portion 1b30 as in the prior art. It is not necessary for the worker to manually rotate the movable jaw side closing body 1b33 to pinch the movable jaw side connecting pin 2b after accommodating the movable jaw side, and the work efficiency can be improved.

Further, as shown in FIG. 5, the movable jaw body 1b is a movable jaw side closed body after the movable jaw side closed body 1b33 closes the opening side of the movable jaw side pin accommodating portion 1b30 and sandwiches the movable jaw side connecting pin 2b. It is provided with movable jaw-side lock pin insertion holes 1b34 and 1b34 into which a removable lock pin (not shown) is inserted so that the 1b33 does not rotate freely.

In the state before the movable fixed jaw side connecting pin 2b is sandwiched between the pair of movable jaw side hook plates 1b3 and 1b3 and the movable jaw side closed body 1b33, the movable jaw side closed body 1b33 is a movable jaw side closed body. As shown in FIG. 2, the movable jaw side closed body pin contact portion 1b33c is stable in a state of being exposed to the movable jaw side pin accommodating portion 1b30 due to its own weight, but the movable jaw side closed body 1b33 A part of the upper part of the above is also exposed to the movable jaw side lock pin insertion holes 1b34 and 1b34.

Further, when the movable ago body 1b is not connected to the piston-side rotating shaft 3c1 on the attachment 2 side, it is basically movable because it is rotatably connected via the piston-side rotating shaft 3c1. Due to the weight of the jaw body 1b itself, the center of gravity is stopped at the lowest position, and the worker changes the angle of the movable jaw body 1b even if the piston 3b1 that expands and contracts from the operating arm 3a and the bucket cylinder 3b is operated. Can't.

Therefore, when the movable jaw body 1b whose angle cannot be adjusted while suspended from such a piston-side rotating shaft 3c1 comes into contact with the movable jaw-side connecting pin 2b, the movable jaw-side connecting pin 2b is changed to the movable jaw-side pin accommodating portion. Before and after the movable jaw side pin accommodating portion 1b30 of the movable jaw side hook plate 1b3 of the movable jaw body 1b so that it can be guided to 1b30, the movable jaw body 1b suspended from the piston side rotation shaft 3c1 is provided. While stopped at the position where the center of gravity is at the lowest position due to its own weight, the front and rear of the movable jaw side pin accommodating portion 1b30 are tilted so as to be lowered in the horizontal direction as the distance from the movable jaw side pin accommodating portion increases. The movable jaw side front pin guide surface 1b35 and the movable jaw side rear pin guide surface 1b36 are provided.

<How to attach the attachment 2 using the attachment attachment jig 1 of the construction machine>
Next, about a method of attaching the attachment 2 to be connected to the fixed jaw side connecting pin 2a and the movable jaw side connecting pin 2b of the attachment 2 by using the attachment attachment jig 1 of the construction machine configured as described above. explain.

(In the case of a small attachment with a narrow distance between the fixed jaw side connecting pin 2a and the movable jaw side connecting pin 2b)

(A state in which the fixed jaw side connecting pin 2a and the movable jaw side connecting pin 2b are not connected to the attachment mounting jig 1)
First, in a state where the fixed jaw side connecting pin 2a and the movable jaw side connecting pin 2b are not connected to the attachment mounting jig 1, as shown in FIG. 5, the rotation shaft for the fixed jaw side closed body is connected to the fixed jaw body 1a3. The fixed jaw side closed body 1a33 rotatably supported via 1a32 is stable in a state where the fixed jaw side closed body pin contact portion 1a33c is exposed to the fixed jaw side pin accommodating portion 1a30 due to its own weight.

At that time, a part of the upper part of the fixed jaw side closed body 1a33 is exposed from the fixed jaw side lock pin insertion hole 1a34.

Similarly, when the fixed jaw side connecting pin 2a and the movable jaw side connecting pin 2b are not connected to the attachment mounting jig 1, the movable jaw body 1b rotates on the tip side of the piston side link 3c and the tip side of the fixed jaw body 1a. The movable jaw side closing body 1b33 of the movable jaw body 1b is also rotatably supported via the piston side rotating shaft 3c1 that is movably connected to the movable jaw side hook plate 1b3. Since it is rotatably supported via 1b32, when the fixed jaw side connecting pin 2a and the movable jaw side connecting pin 2b are not connected, as shown in FIG. 5, the movable jaw is connected to the movable jaw body 1b3. In the movable jaw side closed body 1b33 rotatably supported via the side closed body rotating shaft 1b32, the movable jaw side closed body pin contact portion 1b33c is exposed to the movable jaw side pin accommodating portion 1b30 due to its own weight. It is stable in the state.

At that time, a part of the upper part of the movable jaw side closed body 1b33 is exposed from the movable jaw side lock pin insertion hole 1b34.

(The fixed jaw body 1a of the attachment mounting jig 1 is connected to the fixed jaw side connecting pin 2a)
Next, in the attachment mounting jig 1 of the embodiment according to the present invention, before connecting the movable jaw body 1b of the attachment mounting jig 1 to the fixed jaw side connecting pin 2b, first, as shown in FIG. 6, the fixed jaw body 1a Is connected to the fixed jaw side connecting pin 2a.

At that time, in the fixed jaw side closed body 1a33, the fixed jaw side closed body pin contact portion 1a33c accommodates the fixed jaw side pin in the state before the fixed jaw side connecting pin 2a is accommodated in the fixed jaw side pin accommodating portion 1a30. Since it is exposed to the portion 1a30, when the fixed jaw side connecting pin 2a is accommodated in the fixed jaw side pin accommodating portion 1a30, the fixed jaw side connecting pin 2a comes into contact with the fixed jaw side closed body pin contact portion 1a33c. By pushing the fixed jaw side closed body pin contact portion 1a33c, the fixed jaw side closed body 1a33 is rotated clockwise (α direction) to rotate the fixed jaw side closed body 1a3 with the fixed jaw side pin holding portion 1a31 and the fixed jaw side closed body. The fixed jaw side connecting pin 2a is sandwiched between the fixed jaw side closing body 1a33 of 1a33.

As a result, in the attachment mounting jig 1 of the embodiment according to the present invention, after the fixed jaw side connecting pin 2a is accommodated in the fixed jaw side pin accommodating portion 1a30, the worker manually rotates the fixed jaw side closed body 1a33. Then, without sandwiching the fixed jaw side connecting pin 2a, the fixed jaw side closing body 1a33 is rotated clockwise (α direction) by pushing the fixed jaw side closing body pin contact portion 1a33c with the fixed jaw side connecting pin 2a. Since the fixed jaw side connecting pin 2a can be sandwiched between the fixed jaw side pin holding portion 1a31 of the fixed jaw body 1a3 and the fixed jaw side closing body 1a33 of the fixed jaw side closing body 1a33 by moving, the prior art After accommodating the fixed jaw side connecting pin 2a in the fixed jaw side pin accommodating portion 1a30, it is no longer necessary for the worker to pinch the fixed jaw side connecting pin 2a by manually rotating the fixed jaw side closing body 1a33. , Work efficiency can be improved.

(Connect the movable jaw body 1b of the attachment mounting jig 1 to the movable jaw side connecting pin 2b)
Next, in order to connect the movable jaw side connecting pin 2b to the movable jaw body 1b, the operator operates the piston 3b1 that expands and contracts from the operating arm 3a and the bucket cylinder 3b of the construction machine 2 as shown in FIG. , The movable jaw body 1b is brought close to the movable jaw side connecting pin 2b provided at the rear portion of the attachment 2 at a predetermined interval.

At that time, since the fixed jaw side connecting pin 2a is sandwiched between the fixed jaw side pin holding portion 1a31 of the fixed jaw body 1a3 and the fixed jaw side closing body 1a33 of the fixed jaw side closing body 1a33, it is not shown in the drawing. However, the operator holds the fixed jaw side connecting pin 2a with the attachment mounting jig 1 by operating the construction machine 2, and connects the movable jaw body 1b to the movable jaw side connecting pin 2b with the attachment 2 floating from the ground. And good.

When the movable jaw body 1b is connected to the movable jaw side connecting pin 2b while the attachment 2 is floated from the ground by the fixed jaw side connecting pin 2a, not only the movable jaw body 1b but also the attachment 2 becomes free to rotate. Therefore, the work of connecting the movable jaw body 1b to the movable jaw side connecting pin 2b of the attachment 2 can be performed more smoothly. However, performing the work of connecting the movable jaw body 1b to the movable jaw side connecting pin 2b with the attachment 2 floating from the ground is an example, and is not an essential work in the present invention, and the attachment 2 is in a stable state on the ground. Although the attachment 2 is pulled up slightly via the fixed jaw side connecting pin 2a, the movable jaw body 1b can be connected to the movable jaw side connecting pin 2b of the attachment 2 while the tip of the attachment 2 is still on the ground. Of course you can go.

Even when the fixed jaw body 1a is not connected to the attachment 2, both ends thereof are connected to the operating arm side rotating shaft 3a1 and the piston side rotating shaft 3c1 to maintain a stable posture or angle. In order to maintain the position, even if the removable lock pin (not shown) is not inserted into the fixed jaw side lock pin insertion hole 1a34, the tip portion 1a31a side from the fixed jaw side pin holding portion 1a31 is tilted upward with respect to the horizontal direction. As long as it is, the fixed jaw side connecting pin 2a does not fall.

Here, in the attachment mounting jig 1 of the embodiment according to the present invention, when the movable jaw body 1b is not connected to the attachment 2, the piston side link 3c is passed through the piston side rotation shaft 3c1 at the tip of the piston side link 3c. Since it is rotatably connected to the tip, it is in an unstable (free) state in which it freely rotates clockwise or counterclockwise with the piston side rotation shaft 3c1 as the rotation axis. Although it rotates in response to the operation of the piston 3b1 that expands and contracts from the bucket cylinder 3b, it is basically stable in a state where its center of gravity is located at the lowest position due to the weight of the movable agony body 1b itself.

Then, when the movable jaw body 1b is lowered from the operating arm 3a or the bucket cylinder 3b to bring the movable jaw body 1b closer to the movable jaw side connecting pin 2b of the attachment 2, the angle of the movable jaw body 1b itself cannot be adjusted. A movable jaw side front pin guide surface 1b35 and a movable jaw side rear pin guide surface 1b36 are provided on the front and rear sides of the movable jaw side pin accommodating portion 1b30 so as to be inclined in the horizontal direction as the distance from the movable jaw side pin accommodating portion 1b30 increases. Therefore, the movable jaw body 1b is lowered by operating the piston 3b1 that expands and contracts from the operating arm 3a and the bucket cylinder 3b to move the movable jaw side to the front pin guide surface 1b35 on the movable jaw side or the rear pin guide surface 1b36 on the movable jaw side. When the connecting pin 2b comes into contact, the movable jaw side connecting pin 2b is guided to the movable jaw side front pin guide surface 1b35 or the movable jaw side rear pin guide surface 1b36, and the movable jaw body 1b is centered on the piston side rotation shaft 3c1. It descends while rotating and is accommodated in the movable jaw side pin accommodating portion 1b30.

Note that FIG. 6 shows the case of a small attachment 2 in which the distance between the fixed jaw side connecting pin 2a and the movable jaw side connecting pin 2b is narrow, so that the movable jaw body 1b is lowered so as to approach the movable jaw side connecting pin 2b. When made to move, the movable jaw side rear pin guide surface 1b36 of the movable jaw body 1b is in contact with the movable jaw side connecting pin 2b.

Therefore, when the movable jaw body 1b is further lowered from the contact state between the movable jaw side rear pin guide surface 1b36 and the movable jaw side connecting pin 2b of the movable jaw body 1b shown in FIG. 6, the movable jaw body 1b turns to the piston side. It rotates counterclockwise (β direction) with the moving shaft 3c1 as the rotation axis, and the movable jaw side connecting pin 2b is guided by the movable jaw side rear pin guide surface 1b36 toward the movable jaw side pin accommodating portion 1b30. ..

Here, since the movable jaw side connecting pin 2b is guided by the movable jaw side rear pin guide surface 1b36 and heads toward the movable jaw side pin accommodating portion 1b30, the tip of the movable jaw side closed body 1b33 is the movable jaw side rear pin guide surface. The movable jaw side closed body 1b33 is formed so as not to protrude from 1b36 and obstruct the guidance of the movable jaw side connecting pin 2b. However, even if the tip of the movable jaw side closed body 1b33 protrudes from the movable jaw side rear pin guide surface 1b36, the movable jaw side closed body 1b33 is rotatable, and the movable jaw side connecting pin 2b is closed on the movable jaw side. When the tip of the body 1b33 is pushed and rotated counterclockwise (β direction), the movable jaw side closed body 1b33's movable jaw side closed body pin contact portion 1b33c is exposed from the movable jaw side pin accommodating portion 1b30. Therefore, in the present invention, there is no problem even if the tip end portion of the movable jaw side closed body 1b33 protrudes from the movable jaw side rear pin guide surface 1b36.

Then, when the movable jaw side connecting pin 2b reaches the movable jaw side pin accommodating portion 1b30, the movable jaw side pin accommodating portion 1b30 is subjected to the movable jaw side of the movable jaw side closed body 1b33 as shown in FIGS. Since the closed body pin contact portion 1b33c is exposed, the movable jaw side connecting pin 2b abuts on the movable jaw side closed body pin contact portion 1b33c and pushes the movable jaw side closed body 1b33 clockwise (α direction). ), As shown in FIG. 7, the movable jaw side connecting pin 2b is sandwiched between the movable jaw side pin holding portion 1b31 of the movable jaw body 1b3 and the movable jaw side closing body 1b33 of the movable jaw side closing body 1b33. ..

As described above, in the attachment mounting jig 1 of the embodiment according to the present invention, the worker can get on the construction machine without directly touching and rotating the fixed jaw side closed body 1a33 and the movable jaw side closed body 1b33. By simply operating the operating arm 3a, the piston 3b1 that expands and contracts from the bucket cylinder 3b, etc., the fixed jaw side connecting pin 2a can be sandwiched between the fixed jaw side hook plate 1a3 and the fixed jaw side closing body 1a33, and the movable jaw side hook plate can be sandwiched. The movable jaw side connecting pin 2b can be sandwiched between the movable jaw side closing body 1b33 and the movable jaw side closing body 1b33.

However, in this state, since the fixed jaw side closed body 1a33 and the movable jaw side closed body 1b33 are not locked, the worker does not allow the fixed jaw side closed body 1a33 and the movable jaw side closed body 1b33 to rotate arbitrarily. A removable lock pin (not shown) is inserted into the fixed jaw side lock pin insertion hole 1a34 and the movable jaw side lock pin insertion hole 1b34, respectively, and the fixed jaw side hook plate 1a3 and the fixed jaw side closed body 1a33 are used. The holding state of the fixed jaw side connecting pin 2a is locked, and the holding state of the movable jaw side connecting pin 2b by the movable jaw side hook plate 1b3 and the movable jaw side closing body 1b33 is locked.

In the case of a large attachment 2 in which the distance between the fixed jaw side connecting pin 2a and the movable jaw side connecting pin 2b is wide, the fixed jaw side pin holding portion 1a31 of the fixed jaw body 1a3 and the fixed jaw side closing body 1a33 are fixed jaws. After the fixed jaw side connecting pin 2a is pinched by the side closing body 1a33, the movable jaw body 1b is lowered so as to approach the movable jaw side connecting pin 2b. The side front pin guide surface 1b35 comes into contact with the movable jaw side connecting pin 2b.

Then, when the movable jaw body 1b is further lowered from the contact state between the movable jaw side front pin guide surface 1b35 and the movable jaw side connecting pin 2b of the movable jaw body 1b shown in FIG. 8, the movable jaw body 1b turns to the piston side. Rotating clockwise (α direction) with the moving shaft 3c1 as the rotation axis, the movable jaw side connecting pin 2b is guided by the movable jaw side rear pin guide surface 1b36 and moves toward the movable jaw side pin accommodating portion 1b30. When the movable jaw side connecting pin 2b reaches the movable jaw side pin accommodating portion 1b30, as shown in FIG. 8, the movable jaw side closed body pin contact portion 1b33c exposed to the movable jaw side pin accommodating portion 1b30 has a movable jaw. The side connecting pin 2b abuts, and the movable jaw side connecting pin 2b pushes the movable jaw side closing body pin contact portion 1b33c to rotate the movable jaw side closing body 1b33 clockwise (α direction), as shown in FIG. As described above, the movable jaw side connecting pin 2b can be sandwiched between the movable jaw side pin holding portion 1b31 of the movable jaw body 1b3 and the movable jaw side closing body 1b33 of the movable jaw side closing body 1b33.

<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 present invention, the fixed jaw side pin accommodating portion 1a30 and the movable jaw side pin accommodating portion 1b30 are movable with the fixed jaw side connecting pin 2a, respectively. The fixed jaw side closing body 1a33 and the movable jaw side closing body 1b33 are opened so as to accommodate the jaw side connecting pin 2b from the right side in FIGS. 1 and 2 on the same side, respectively. It is rotatably supported by the body 1a and the movable jaw body 1b, and the fixed jaw side closed body 1a33 accommodates the fixed jaw side pin 2a when the fixed jaw side connecting pin 2a is accommodated in the fixed jaw side pin accommodating portion 1a30. The fixed jaw side connecting pin 2a facing the portion 1a30 pushes and rotates the fixed jaw side closed body pin contact portion 1a33c exposed to the fixed jaw side pin accommodating portion 1a30 in the fixed jaw side closed body 1a33 to rotate the fixed jaw. A fixed jaw-side closed body pin holding portion 1a33a for sandwiching the fixed jaw-side connecting pin 2a is provided between the body 1a and the fixed jaw-side pin holding portion, while the movable jaw-side closed body 1b33 has a movable jaw-side pin accommodating portion. When the movable jaw side connecting pin 2b is accommodated in 1b30, the movable jaw side connecting pin 2b that tends toward the movable jaw side pin accommodating portion 1b30 is exposed to the movable jaw side pin accommodating portion 1b30 in the movable jaw side closed body 1b33. Movable jaw side closed body pin holding portion 1b33a that pushes and rotates the movable jaw side closed body pin contact portion 1b33c to sandwich the movable jaw side connecting pin 2b with the movable jaw side pin holding portion 1b31 of the movable jaw body 1b. Is provided.

Therefore, according to the attachment mounting jig 1 and the construction machine of the construction machine according to the present invention, the fixed jaw side connecting pin 2a and the movable jaw side connecting pin 2b provided at predetermined intervals on the attachment 2 side are respectively. The fixed jaw side pin accommodating portion 1a30 of the fixed jaw body 1a provided on the operating arm 3a side of the construction machine and the movable jaw side pin accommodating portion 1b30 of the movable jaw body 1b are moved to the fixed jaw side closing body 1a33 and the movable jaw side closing. When the body 1b33 is closed and pinched, the worker simply operates the operating arm 3a, the piston 3b1 that expands and contracts from the bucket cylinder 3b, etc. while riding on the construction machine, and the fixed jaw side closed body 1a33 and the movable jaw side closed body 1b33. Can be pinched without manual operation, and the attachment work of the attachment attachment jig 1 and the attachment 2 can be easily performed.

Further, in the attachment mounting jig 1 of the construction machine according to the present invention, the movable jaw body 1b does not accommodate the movable jaw side pin in the movable jaw side pin accommodating portion 1b30, and the movable jaw body 1b is a fixed jaw body. In the state of hanging from 1a by its own weight, the front and rear of the movable jaw side pin accommodating portion 1b30 are movable jaw side pin guide surfaces inclined so as to be lowered in the horizontal direction as the distance from the movable jaw side pin accommodating portion 1b30 increases. A movable jaw side front pin guide surface 1b35 and a movable jaw side rear pin guide surface 1b36 are provided.

Therefore, the movable jaw body 1b hangs in a state where it can rotate around the fixed jaw body 1a around the movable jaw portion side lock pin insertion hole 1b34, and the worker cannot directly control the angle of the movable jaw body 1b, but the movable jaw body 1b cannot be directly controlled. When the body 1b is lowered so as to approach the movable jaw side connecting pin 2b, either the movable jaw side front pin guide surface 1b35 or the movable jaw side rear pin guide surface 1b36 abuts on the movable jaw side connecting pin 2b. Then, the movable jaw side connecting pin 2b is guided to the movable jaw side pin accommodating portion 1b30 by the movable jaw side front pin guide surface 1b35 or the movable jaw side rear pin guide surface 1b36, so that the worker manually guides the movable jaw body 1b. The movable jaw-side connecting pin 2b can be moved to the movable jaw-side pin accommodating portion 1b30 without any operation, and in this respect as well, the connection work between the attachment attachment jig 1 and the attachment 2 can be made more efficient.

In the description of the above embodiment, the two-axis type in which the rotating shafts are the operating arm side rotating shaft 3a1 and the piston side rotating shaft 3c1, that is, the fixed ago body 1a is on the operating arm side at the tip of the operating arm 3a. The movable agony body 3b connects the piston-side rotating shaft 3c1 at the tip of the piston-side link 3c to the piston-side rotating shaft 3c1 while the movable agony body 3b is rotatably connected at two points via the rotating shaft 3a1 and the piston-side rotating shaft 3c1 at the tip of the piston-side link 3c. Although it has been described by applying it to the attachment attachment jig 1 of a two-axis type construction machine rotatably connected to the fixed jaw body 1a and the piston side link 3c via the present invention, the present invention is not limited to this, and for example, the above-mentioned description is made. As shown in FIGS. 1 and 4 of Patent No. 643071 of Patent Document 5, the rotation shafts of the agos are rotating shafts 1c (see FIGS. 1 and 4 of Patent Document 5 of Patent No. 6430671). ), A three-axis type consisting of a rotating shaft 3a1 on the operating arm side and a rotating shaft 3c1 on the piston side, that is, a fixed jaw body 1a and a movable jaw body 1b are rotating shafts 1c between the jaw bodies (Patent of Patent Document 5). It is rotatably connected via FIGS. 1 and 4 of Japanese Patent Application Laid-Open No. 6430671, while the other end of the fixed jaw body 1a is connected to the operating arm side rotating shaft 3a1 at the tip of the operating arm 3a. Of course, the other end of the movable agony body 1b may also be applied to an attachment mounting jig of a 3-axis type construction machine configured to be connected to the piston-side rotating shaft 3c1 at the tip of the piston-side link 3c.

1 Attachment mounting jig 1a Fixed jaw body 1a1 Fixed jaw side connecting plate 1a2 Fixed jaw side horizontal board 1a3 Fixed jaw side hook plate 1a30 Fixed jaw side pin accommodating part 1a31 Fixed jaw side pin holding part 1a32 Fixed jaw side closing body Rotating shaft 1a33 Fixed Jaw side closed body 1a33a Fixed jaw side closed body pin holding part 1a33b Fixed jaw side closed body connecting pin guide surface 1a33c Fixed jaw side closed body pin contact part 1a34 Fixed jaw side lock pin insertion hole 1a5, 1a5 Acting arm side rotating bearing Part 1b Movable jaw body 1b1 Movable side connecting part 1b2 Slide board 1b3 Movable jaw side hook plate 1b30 Movable jaw side pin accommodating part 1b31 Movable jaw side pin holding part 1b32 Movable jaw side closing body Rotating shaft 1b33 Movable jaw side closing body 1b33a Movable jaw side closed body pin holding part 1b33b Movable jaw side closed body pin guide surface 1b33c Movable jaw side closed body pin contact part 1b34 Movable jaw side lock pin insertion hole 1b5, 1b5 Piston side rotating bearing part 2 Attachment 2a Fixed jaw side Connecting pin 2b Movable jaw side connecting pin 3a Acting arm 3a1 Acting arm side rotating shaft 3b Bucket cylinder 3b1 Piston 3c Piston side link 3c1 Piston side rotating shaft 3d Arm link

Claims (4)

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 the construction machine, respectively, and the fixed jaw side pin accommodating portion of the fixed jaw body and the above. After accommodating in the movable jaw side pin accommodating portion of the movable jaw body 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 piston side link, the fixed jaw side pin accommodating. It is an attachment attachment jig for construction machinery that attaches an attachment by closing the opening of the portion and the opening of the movable jaw side pin accommodating portion by a fixed jaw side closed body and a movable jaw side closed body, respectively.
The fixed jaw side pin accommodating portion and the movable jaw side pin accommodating portion are opened so as to accommodate the fixed jaw side connecting pin and the movable jaw side connecting pin from the same side, respectively.
The fixed jaw side closed body and the movable jaw side closed body are rotatably supported by the fixed jaw body and the movable jaw body, respectively.
In the fixed jaw side closed body, when the fixed jaw side connecting pin is accommodated in the fixed jaw side pin accommodating portion, the fixed jaw side connecting pin that tends to face the fixed jaw side pin accommodating portion is attached to the fixed jaw side connecting pin. Fixed jaw side closed body exposed to the side pin accommodating body Push and rotate the pin contact portion to hold the fixed jaw side connecting pin between the fixed jaw side pin holding part and the fixed jaw side closed body. While the body pin holding part is provided,
In the movable jaw side closed body, when the movable jaw side connecting pin is accommodated in the movable jaw side pin accommodating portion, the movable jaw side connecting pin that tends to face the movable jaw side pin accommodating portion is attached to the movable jaw side connecting pin. Movable jaw side closed body exposed to the side pin accommodating body Push and rotate the pin contact portion to sandwich the movable jaw side connecting pin with the movable jaw side pin holding part of the movable jaw body. An attachment mounting jig for construction machinery, which is characterized by being provided with a body pin holding portion. In the attachment mounting jig for construction machinery according to claim 1,
The fixed jaw body is rotatably connected to the operating arm-side rotating shaft at the tip of the operating arm and the piston-side rotating shaft at the tip of the piston-side link.
A construction machine characterized in that the movable jaw body is rotatably connected to the fixed jaw body and the piston side link via a piston side rotation shaft at the tip of the piston side link. In the attachment mounting jig for construction machinery according to claim 2.
Before and after the movable jaw side pin accommodating portion in the movable jaw body, when the movable jaw side pin is not accommodated in the movable jaw side pin accommodating portion, the movable jaw side pin accommodating portion is separated from the movable jaw side pin accommodating portion. Therefore, an attachment mounting jig for construction machinery, which is provided with a pin guide surface that is inclined so as to be lowered with respect to the horizontal direction. A construction machine comprising the attachment mounting jig for the construction machine according to claim 1 to 3.

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