JP3269800B2 - Jig for connecting pin insertion and connecting pin insertion method using the jig - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an insertion method for connecting a first member provided with an insertion hole and a second member with a pin, by aligning the insertion holes and inserting the pin into the insertion hole. The present invention relates to a jig for use and an alignment method using the jig.

[0002]

2. Description of the Related Art A construction machine, for example, a hydraulic shovel has a traveling body that can travel on a crawler belt. The revolving unit is provided with a working device including a boom, an arm, a bucket, and the like. In this working device, a boom, an arm, a bucket, and the like are rotatably connected to each other by pins to form a multi-joint, and these are driven by a hydraulic cylinder to perform work such as excavation.

[0003]

The working device described above is
The boom, the arm, and the bucket are each relatively rotatably connected by a pin.For example, when replacing a bucket connected to the tip of the arm for repair, the pin connecting the Withdrawing, disengaging them and removing the bucket from the arm are performed. When connecting the repaired bucket or a new bucket to the tip of the arm again, align the boss hole at the tip of the arm with the connection hole of the bucket, and connect the aligned boss hole to the bucket. It is necessary to insert a pin into the hole and connect it. However, the bucket is heavy and it is difficult to move freely for alignment, and the arm can be turned up and down, back and forth, and left and right by the hydraulic cylinder and swivel motion, but the connection between the boss hole and the bucket is not possible. It is difficult to perform fine operations such as alignment with holes. Therefore, it is difficult to align the boss hole of the arm with the connection hole of the bucket so that the pin can be inserted smoothly. For this reason, conventionally, the arm tip and the pivoting motion move the tip of the arm near the connection hole of the bucket placed on the ground, and one worker inserts an iron bar or the like to use the boss of the arm by this principle. The hole or the connecting hole of the bucket is moved to align the holes, and another worker performs a task of passing a pin toward the aligned boss hole and the bucket connecting hole. For this reason, labor and time are required for the worker, and the workability is deteriorated.

SUMMARY OF THE INVENTION The present invention solves the above-mentioned problems, and an operator can easily perform a pin hole alignment operation by himself, and can smoothly insert a pin into the aligned pin hole. An object of the present invention is to provide a jig for use and an insertion method using the jig.

[0005]

According to a first aspect of the present invention, there is provided a connecting pin insertion jig provided in a first insertion hole provided in a first member and in a second member. per the insertion of the connecting pin and a second insertion hole which is, to align the insertion hole of the first member and the second member Osamu
A tool, wherein a cylinder-shaped fitting portion having an outer diameter corresponding to the inner diameter of the insertion holes, tapers are formed in a tapered shape by the taper angle of the taper toward the tip portion from the fitting portion Part and a grip part extending in the axial direction from the fitting part
And provided on the grip portion and larger than the inner diameter of the insertion hole.
And an annular stopper having an outer diameter .

Accordingly, when the first member and the second member are connected by the pin, the first member and the second member are substantially aligned with each other. When the connecting pin insertion jig is inserted into the insertion holes, the outer peripheral portions of the first insertion hole and the insertion hole of the second member are moved by the wedge action of the tapered portion so as to coincide with each other. In a state in which the first and second insertion holes straddle the first member and the second member, the first and second insertion holes completely coincide with each other. The connecting pin can be inserted smoothly without shifting.

According to a second aspect of the present invention, there is provided a jig for inserting a connecting pin.
Per the insertion of the connecting pin and a second insertion hole provided in the first insertion hole and a second member provided on the first member
Ri, alignment of the insertion hole of the first member and the second member
A jig having a cylindrical shape having an outer diameter corresponding to the inner diameter of each of the insertion holes, and a taper shape formed by a taper angle tapering from the fitting portion toward the tip end. A first taper portion, and a second taper portion tapered from the first taper portion toward the tip at a taper angle larger than the taper angle of the first taper portion. A grip portion extending in the axial direction from the fitting portion
And provided on the grip portion and larger than the inner diameter of the insertion hole.
And an annular stopper having an outer diameter .

Accordingly, when the first member and the second member are connected by the pin, the first insertion hole of the first member and the insertion hole of the second member are almost aligned. When the jig for inserting the connecting pin is inserted into the insertion holes, the wedge action of the second tapered portion causes the first and second members to form an outer peripheral portion between the first insertion hole and the insertion hole of the second member. And the outer periphery of the first insertion hole and the outer periphery of the second insertion hole coincide with each other by the first tapered portion, so that the fitting portion becomes the first insertion hole and the second insertion hole. You will be guided to a position that straddles. The first and the second aligned by this
The connecting pin can be smoothly inserted without the second insertion hole being displaced.

According to a third aspect of the present invention, there is provided a jig for inserting a connecting pin.
A first insertion hole provided in a first member of the construction machine;
Per the insertion of the connecting pin and a second insertion hole provided in the member, the first member and the second member of the construction machine
A jig for positioning an insertion hole, wherein a cylindrical fitting portion having an outer diameter corresponding to an inner diameter of each of the insertion holes, and a taper angle tapering from the fitting portion toward a tip end portion. A tapered portion formed in a tapered shape, a grip portion extending in the axial direction from the fitting portion, provided on the grip portion ,
An annular stopper having an outer diameter larger than the inner diameter of the insertion hole
And

Accordingly, the first member and the second member of the construction machine
When connecting the first member and the second member, the jig for inserting the connecting pin is inserted into the insertion hole with the first insertion hole of the first member and the insertion hole of the second member being substantially aligned. Then, by the wedge action by the tapered portion, the outer peripheral portion of the first insertion hole and the outer peripheral portion of the insertion hole of the second member move so as to coincide with each other, and the fitting portion moves between the first member and the second member. In the state of straddling, the first and second insertion holes completely coincide with each other,
As a result, the connection pins can be smoothly inserted without the first and second insertion holes being aligned being displaced.

According to a fourth aspect of the present invention, there is provided a jig for inserting a connecting pin.
In the jig for connecting pin insertion, a hole is formed in the jig so as to penetrate in the axial direction.

This allows the air in the first insertion hole and the second insertion hole to be discharged from the holes when the jig for inserting the connecting pin is inserted, so that the jig for inserting the connecting pin can be smoothly inserted. Can do it.

According to a fifth aspect of the present invention, there is provided a method for inserting a connecting pin using a connecting pin inserting jig, wherein the first inserting hole provided in the first member and the second inserting hole provided in the second member. Is applied to a method of connecting the first member and the second member by inserting a connecting pin through the connecting portion, and is formed by a columnar body, and has an outer diameter dimension corresponding to the inner diameter of the insertion hole. And a taper portion formed in a tapered shape with a taper angle tapering from the fitting portion toward the distal end portion, and the taper portion of the connecting pin insertion jig having a grip portion provided in the fitting portion. The first insertion hole of the first member and the second insertion hole of the second member, which are substantially aligned, are inserted into the first through hole and the second insertion hole for inserting the connection pin into the second insertion hole. The connecting pin is inserted from the side opposite to the side where the jig is inserted.

Thus, the first insertion hole of the first member and the second insertion hole of the second member can be easily aligned, and the connecting pin can be smoothly inserted, thereby improving workability. I do.

According to a sixth aspect of the present invention, there is provided an insertion method using the connecting pin insertion jig, wherein the first pin is connected to the first insertion hole provided in the first member and the second insertion hole provided in the second member. The method is applied to a method of connecting the first member and the second member by inserting a pin, and is formed by a columnar body, and has a fitting portion having an outer diameter corresponding to an inner diameter of the insertion hole; A taper portion formed in a tapered shape with a taper angle tapering from the fitting portion to the tip portion, and a taper portion of the connecting pin insertion jig having a grip portion provided in the fitting portion are substantially aligned. Inserted into the first insertion hole of the first member and the second insertion hole of the second member, and the fitting portion is located at a position straddling the first member and the second member. The jig for inserting the connecting pin into the first insertion hole and the second insertion hole is held. The connecting pin is inserted from the side opposite to the inserted side.

Thus, the first insertion hole of the first member and the second insertion hole of the second member can be easily aligned, and the connecting pin can be smoothly inserted, thereby improving workability. I do.

[0017]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of a jig for inserting a connecting pin according to the present invention will be described with reference to FIGS. FIG. 1 is a configuration diagram showing the entire configuration of a hydraulic shovel using a connecting pin insertion jig of the present invention, FIG. 2 is an enlarged view of a main part in FIG.
FIG. 3 is a sectional view taken along the line EE in FIG. 2 and FIG.
Is an overall side view of the connecting pin insertion jig, FIG.
(C) is a view taken in the direction of the arrow F and G in FIG. 4 (a), and FIG. 4 (d) is a sectional view of the jig for inserting the connecting pin, FIG.
FIG. 6 is a state explanatory view showing a state in which the connecting pin insertion jig is used.

As shown in FIG. 1, a hydraulic excavator using the connecting pin insertion jig of the present invention is provided with a traveling body 2 having a crawler belt 1 and a rotatable swinging device on the traveling body 2 through a swivel device 3. A revolving body 4 provided, and a cab 5 provided on the revolving body 4,
It is roughly composed of the working device 6. Working device 6 described above
Are a boom 7 rotatably pin-connected to the revolving unit 4, an arm 8 rotatably pin-connected to the boom 7, an arm 8
A bucket 9 pivotally connected to the tip of the boom, a hydraulic boom cylinder 10, an arm cylinder 11, and a bucket cylinder 12 for rotating the boom 7, the arm 8, and the bucket 9;
One end is connected to an arm (first member) 8, and the other end is connected to a bucket (second member) 9 via links 13 and 14.
Linked to

As shown in FIG. 2, the bucket 9 has a pair of left and right bucket brackets 9a, 9a having insertion holes 9b, 9c at the upper portion thereof, which are connected to the arm 8 (only one is shown). Arm boss 8a at the tip
(See FIG. 3), and an insertion hole (not shown) for the link 13 provided near the arm boss 8a. The arm boss 8a is provided with a bush 8c forming an insertion hole 8b fitted therein. (See FIG. 3) The inner diameters of the insertion hole (first insertion hole) 8b and the insertion hole (second insertion hole) 9b are substantially the same. The other end of the bucket cylinder 12 is connected by a pin 17 together with the other end of a link 13 having one end connected to the arm 8 by a pin 15 and the other end of a link 14 having one end connected to the bucket bracket 9a by a pin 18. Then, it is connected to the bucket 9 via the links 13 and 14.

The structure of the connecting portion between the arm 8 and the bucket 9 will be described in further detail with reference to FIG. 3. The arm bosses 8a of the arm 8 are arranged between bucket brackets 9a, 9a provided on the left and right sides of the bucket 9, respectively. The pins 16 are inserted into the insertion holes 9b and 8b with the outer peripheral portions of the insertion holes 9b and 9b of the bucket brackets 9a and 9a and the insertion holes 8b of the arm boss 8a aligned. Then, in this state, the fixing bolt 20 is inserted through the fixing bolt insertion hole 9c provided in the one bucket bracket 9a and the fixing bolt insertion hole 16a provided in the pin 16, and the nut 21,
Fix by 21. This prevents the pin 16 from coming out of the insertion hole 9b and the insertion hole 8b and preventing the pin 16 from rotating in the insertion hole 9b and the insertion hole 8b.

Although the description is omitted in the present embodiment, the connecting portion includes a pin 16 and a bucket bracket 9.
A lubrication structure is provided for guiding a lubricant (grease) to the sliding part in order to prevent abrasion of the sliding part with the a, 9a and the arm boss 8a, and the lubrication supplied by the lubricating structure is provided. Material is filled in the gap between the arm boss 8a and the bucket brackets 9a, 9a, and the O-ring 22 prevents the lubricant from flowing out and dust from entering the sliding portion from the outside.

Next, the structure of the connecting jig used to connect the bucket 9 and the arm 8 will be described with reference to FIGS.
This will be described with reference to FIG.

The connecting jig 30 is formed of a cylindrical steel material as shown in FIGS. 4A to 4D, and has a straight cylindrical portion 30a formed at the center thereof and a distal end formed thereof. Second tapered portion 30c to be formed, and second tapered portion 30c
And a first tapered portion 30b formed between the first cylindrical portion 30a and the straight cylindrical portion 30a.
And a holding portion 30d extending from the holding portion. Straight column 3
0a is an outer diameter of the insertion hole 9 of the bucket bracket 9a.
b and the inner diameter of the insertion hole 8b of the arm boss 8a, and is formed in a substantially straight cylindrical shape without inclination in the axial direction, and the insertion of the insertion hole 9b of the bucket bracket 9a and the arm boss 8a shown in FIG. The length is set so as to straddle the bucket bracket 9a and the arm boss 8a when inserted into the hole 8b.

The outer diameter of the second tapered portion 30c is smaller than the inner diameter of the insertion hole 9b of the bucket bracket 9a and the inner diameter of the insertion hole 8b of the arm boss 8a, and extends from the second tapered portion 30c to the first tapered portion 30b. It is formed in a tapered shape inclined by the taper angle θ1. The first tapered portion 30b is separated from the second tapered portion 30c by the straight cylindrical portion 3
It is formed in a tapered shape inclined by the taper angle θ2 toward 0a. Note that the taper angle θ1 of the second taper portion 30c is set to be larger than the taper angle θ2 of the first taper portion 30b (θ1> θ2). Gripping part 3
0d is formed in a small-diameter cylindrical shape extending from the linear cylindrical portion 30a, and is set to a length that can be easily gripped by an operator. Further, in the present embodiment, in order to prevent the connecting jig 30 from being unnecessarily inserted into the insertion holes 8b and 9b,
An annular stopper 30g having an outer diameter larger than the inner diameter of the insertion hole 9b of the bucket bracket 9a is attached to the grip portion 30d.

As shown in FIG. 4 (d), the connecting jig 30 has an opening in the second tapered portion 30c at the center thereof, and has an opening 30e extending in the axial direction and an opening in the gripping portion 30d. A hole 30f having a portion and communicating with the hole 30e is provided.

Next, based on the connecting procedure between the bucket 9 and the arm 8 using the connecting jig 30 described above, the connecting jig 30
The operation of will be described.

In order to replace the bucket 9 or replace the bucket 9 removed for repair with the arm 8, first, the bucket 9 to be connected is placed on the ground or pallet near the body of the excavator, With the working device 6 in the posture illustrated in FIG. 1, the distal end portion of the arm 8 (the arm boss 8
a) is brought close to the insertion hole 9b of the bucket bracket 9a of the bucket 9, and the insertion hole 8b of the arm boss 8a and the insertion hole 9b of the bucket bracket 9a are aligned. This operation is performed by rotating the boom 7 and the arm 8 and turning the revolving unit 5.
It is performed by the turning operation of. Then, an iron pipe or a bur is inserted into the aligned insertion holes 8b and 9b, and these are temporarily connected.

Next, the boom 7 is slightly lifted from this state, so that the bucket 9 can be moved relative to the arm 8 by a play between the insertion holes 8b, 9b and the burl or iron pipe, so that a degree of freedom of positioning is provided. On the bucket cylinder 12
Of the link 14 connected to the tip of the bucket cylinder 12 and the insertion hole 9c of the bucket bracket 9a due to the expansion and contraction of the link 14 and the rotation of the link 14 about the pin 17. Roughly align
The above-described connecting jig 30 is inserted into these insertion holes. In this state, a slight displacement occurs between the insertion hole 9c and the insertion hole of the link 14 at the inner peripheral portion thereof.

Then, the insertion jig 30 is inserted into the insertion hole 9c of the bucket bracket 9a and the insertion hole of the link 14 corresponding to the outer periphery of the connection jig 30 by the operation described later by the insertion of the connection jig 30. Pin 1 from opposite side
8 is inserted, the connecting jig 30 is pulled out, and the connection between the bucket bracket 9a and the link 14 is completed.

Next, the boom 7 is lowered, the bucket 9 is grounded on the ground or on a pallet, and an iron pipe or burl inserted through the insertion hole 8b of the arm boss 8a and the insertion hole 9b of the bucket bracket 9a is pulled out. 30
Into the insertion holes 8b and 9b. In this case, the connecting jig 30 is used in the same manner as in the case of the above-mentioned connecting work between the bracket 9a and the link 14, but after this work, the operator holds the holding portion 30d of the connecting jig 30. In this state, the inner peripheral portion between the insertion hole 9b and the insertion hole 8b is slightly displaced, and the inserted connecting jig 30 is in its second position.
Is in contact with the vicinity of the opening of the insertion hole 8b of the arm boss 8a. By further pushing the connecting jig 30, the arm boss 8 a is inserted into the insertion hole 8 by a wedge action.
b and the outer peripheral surface of the straight cylindrical portion 30a are moved coaxially, guided by the second tapered portion 30c and the first tapered portion 30b, and inserted into the insertion hole 9b of the bucket bracket 9a. The arm boss 8a is positioned so that the inner periphery of the arm boss 8a and the insertion hole 8b coincide with each other.

When the straight cylindrical portion 30a straddles the bucket bracket 9a and the arm boss 8a, the insertion of the connecting jig 30 is stopped, and the bucket bracket 9a on the side opposite to the side where the connecting jig 30 is inserted is stopped. The pin 16 is inserted from the insertion hole 9b. Thereby, the insertion hole 8b of the arm boss 8a and the insertion hole 9b of the bucket bracket 9a
The pins 16 are aligned without displacement and the pins 16 are inserted smoothly. Then, while inserting the pin 16,
The connecting jig 30 is pulled out, and the pin 16 is fixed with the fixing bolt 20, whereby the connecting operation of the bucket 9 to the arm 8 is completed.

The same applies to the operation when the connecting jig 30 is inserted into the insertion hole of the link 14 and the insertion hole 9c of the bucket bracket 9a. Note that the bucket bracket 9
a in the insertion hole 9b and the insertion hole 8b in the arm boss 8a,
Grease, which is a lubricant, remains.
0, and the inner diameters of the insertion hole 9b and the insertion hole 8b are substantially the same.
When the a is inserted into the insertion hole 9b and the arm boss 8a into the insertion hole 8b, the air in the insertion hole 9b and the insertion hole 8b is hardly discharged to the outside, but the holes 30e and 30
The air in the insertion hole 9b and the insertion hole 8b can be released to the outside by f, whereby the connecting jig 30 is inserted smoothly.

As described above, in this embodiment, the connecting jig 3 having the first and second tapered portions 30b and 30c is used.
0, the insertion hole 8 of the arm boss 8a of the arm 8 is inserted.
b and the insertion hole 9b of the bucket bracket 9a of the bucket 9
Can be performed, the positioning operation becomes easy, and only one worker can perform the connecting operation to the arm of the bucket, thereby improving workability.

Since the connecting jig 30 is provided with the holding portion 30d, the connecting jig 30 is easy to handle and the connecting operation can be easily performed. Further, the connecting jig 30 has a hole 3
Since the connecting jigs 30e are provided, the connecting jig 30 can be inserted smoothly, and the weight can be reduced, so that the workability and the handleability of the operator can be further improved.

The connecting jig 30 described above is used by repeatedly inserting and removing the insertion hole 8b of the arm boss 8a and the insertion hole 9b of the bucket bracket 9a.
Considering this, it is desirable to use a wear-resistant material.

The length of the gripping portion 30d is also different from the outer surface of the bucket bracket 9a.
Is appropriately set in accordance with the distance between the inner surface of the arm and the outer surface of the arm boss 8a. Also, by attaching an annular stopper 30g having an outer diameter larger than the inner diameter of the insertion hole 9b of the bucket bracket 9a to the grip portion 30d, the connecting jig 30 can be inserted into the insertion holes 8b, 9b unnecessarily. Absent. The mounting position of the stopper 30g is shown in FIG.
As shown in FIG. 7, when the straight cylindrical portion 30a reaches a position straddling the bucket bracket 9a and the arm boss 8a, the straight cylindrical portion 30a comes into contact with the outer surface of the bucket bracket 9a.

The connecting jig 30 has a second tapered portion 3.
0c, the outer diameter of the first tapered portion 30b and the outer diameter of the straight cylindrical portion 30a are determined by the size of the insertion hole 8b of the arm boss 8a and the insertion hole 9b of the bucket bracket 9a.
Arm boss 8a and bucket bracket 9 of bucket 9
The distance is set as appropriate according to the distance to a. For example, those shown in FIGS. 7A to 7D are used. FIG.
(A) to (d) are drawn corresponding to FIGS. 4 (a) to (d), respectively. In the connecting jig 40 shown in FIGS. 7 (a) to (d), 40a to 40g are respectively 30a- 3
0g corresponds to each part. In addition, the holding portion 30d,
It is also possible to make the 40d with a pipe material in a separate structure from the straight cylindrical portions 30a, 40a, and to fix the gripping portions 30d, 40d and the straight cylindrical portions 30a, 40a by welding or the like.

In this embodiment, the connection between the bucket 9 and the arm 8 has been described. However, the present invention is not limited to this.
The connecting jig 30 is positioned by inserting through holes such as connecting the boom 7 to the revolving unit 4 and connecting the boom 7 to the arm 8.
It can be used for those that are pin-coupled.

[0039]

According to the present invention, the connecting pin inserting jig and the connecting pin inserting method using the jig according to the present invention are constructed as described above. The tool has a cylindrical fitting portion having an outer diameter corresponding to the inner diameter of the first and second insertion holes of the first member and the second member to be connected, and a tip from the fitting portion. a tapered portion formed in a tapered shape at a predetermined inclination angle towards, set the gripping portion
And an annular shape having an outer diameter larger than the inner diameter of the insertion hole.
When the first member and the second member are connected by a pin, the first insertion hole of the first member and the second insertion hole of the second member are provided. When the connecting pin insertion jig is inserted into these insertion holes in a state in which the first insertion hole and the second member are substantially aligned, the first member and the second member are connected to the first insertion hole and the second insertion hole by the wedge action of the tapered portion. The member is moved so that its center coincides with the insertion hole of the member, and when the fitting portion straddles the first member and the second member, the outer peripheral positions of the first insertion hole and the second insertion hole are equal. Accordingly, the connecting pin can be easily and smoothly inserted, and the workability can be improved because the first insertion hole and the second insertion hole which are aligned do not have a positional shift. In addition, the inside of the insertion hole
Since an annular stopper with an outer diameter larger than the diameter is provided,
The jig is not unnecessarily inserted into the insertion hole.

Further, in the connecting pin insertion jig according to the second aspect, the first tapered portion is formed in a tapered shape at a predetermined inclination angle from the fitting portion toward the distal end.
A second tapered portion formed in a tapered shape at a predetermined inclination angle larger than the inclination angle of the first tapered portion from the first tapered portion toward the tip end ;
Holding portion, having an outer diameter larger than the inner diameter of the insertion hole.
When the first member and the second member are connected to each other with a pin, a jig for inserting a connecting pin is inserted into the through holes when the first member and the second member are connected to each other. , The first and second members are moved such that the outer peripheral positions of the first through hole and the through hole of the second member coincide with each other.
While being moved so that the outer peripheral positions of the insertion hole and the second insertion hole coincide with each other, the second tapered portion smoothly guides the fitting portion to a position across the first member and the second member. Is done.

Thus, the connecting pin insertion jig can be smoothly inserted into the first and second insertion holes, and no misalignment occurs between the aligned first and second insertion holes. The connecting pin can be inserted smoothly and easily, and workability is improved. Also, larger than the inner diameter of the insertion hole in the gripper
An annular stopper with a large outer diameter is provided so that the jig can be inserted
No unnecessary insertion into the hole.

According to the third aspect of the present invention, there is provided a jig for inserting a connecting pin.
A first insertion hole provided in a first member of the construction machine;
It is applied to connecting the first member and the second member of the construction machine by inserting a connecting pin into a second insertion hole provided in the member, and for example, a bucket of a hydraulic shovel and At the time of connection with the arm, when the jig for inserting the connecting pin is inserted into the insertion hole in a state where the insertion hole of the bucket and the arm are substantially aligned, the wedge action of the tapered portion causes the first insertion hole and the first insertion hole to be in contact with each other. The first and second insertion holes are moved in a state where the outer periphery of the insertion hole of the second member coincides with the outer periphery of the second member, and the fitting portion straddles the first member and the second member. The connecting pins are completely matched, whereby the first and second insertion holes aligned with each other can be smoothly inserted without displacement. Also, the grip
An annular stopper with an outer diameter larger than the inner diameter of the insertion hole is installed.
The jig prevents unnecessary insertion of the jig into the insertion hole.
No.

According to a fourth aspect of the present invention, in the connecting pin inserting jig, a hole penetrating in the axial direction is formed in the connecting pin inserting jig so that the connecting pin inserting jig can be connected to the first and second members. At the time of insertion into each insertion hole, the air in the first insertion hole and the second insertion hole can be discharged from the holes to the outside, so that the resistance at the time of insertion due to the internal air can be reduced, and the connecting pin insertion jig can be reduced. The tool can be inserted smoothly.

According to a fifth aspect of the present invention, in the connecting pin inserting method using the connecting pin inserting jig, the first insertion hole of the first member and the second insertion hole of the second member are substantially aligned. Align, insert the tapered portion of the connecting pin insertion jig into the first insertion hole of the first member and the second insertion hole of the second member, and insert the first insertion hole and the second insertion hole. By inserting the connecting pin from the side of the second insertion hole opposite to the side where the connecting pin insertion jig is inserted, the first through hole of the first member and the second through hole of the second member are inserted. Alignment with the insertion hole can be easily performed, and the connecting pin can be smoothly inserted, so that workability is improved.

According to a sixth aspect of the present invention, there is provided a method of inserting a connecting pin using a connecting pin inserting jig, wherein the first inserting hole of the first member and the second inserting hole of the second member are connected to each other. And the first and second tapered portions of the connecting pin insertion jig are sequentially inserted into the respective insertion holes of the first and second members. The fitting portion is held at a position straddling the first member and the second member, and the jig for inserting the connection pin into the first insertion hole and the second insertion hole is inserted. By inserting the connection pin from the side opposite to the side, the insertion jig for the connection pin can be smoothly inserted, and the first insertion hole of the first member and the second insertion hole of the second member Can be easily adjusted, so that the connecting pin can be smoothly inserted, and the workability is improved.

[Brief description of the drawings]

FIG. 1 is an overall side view of a connecting pin insertion jig of the present invention and a hydraulic shovel employing a connecting pin insertion method using the jig.

FIG. 2 is an enlarged view of a main part of FIG.

FIG. 3 is an enlarged sectional view taken along the line EE in FIG. 2;

FIG. 4A is an overall side view of a jig for inserting a connecting pin according to an embodiment of the present invention, and FIGS. 4B and 4C are views taken along arrow F and G of FIG. (D) is a sectional view thereof.

FIG. 5 is a state explanatory view illustrating a procedure of a connecting pin inserting method using the connecting pin inserting jig of the present invention.

FIG. 6 is a state explanatory view illustrating a procedure of a connecting pin inserting method using the connecting pin inserting jig of the present invention.

FIG. 7A is an overall side view of a connecting pin insertion jig according to another embodiment of the present invention, and FIGS. 7B and 7C are views taken along arrows H and I of FIG. , (D) is a sectional view thereof.

[Explanation of symbols]

8: arm, 8a: arm boss, 8b: insertion hole, 9: bucket, 9a: bracket, 9b: insertion hole, 12: bucket cylinder, 13, 14: link, 15, 16, 1
7, 18: connecting pin, 30: connecting jig, 30a: straight cylindrical portion, 30b: second tapered portion, 30c: first tapered portion, 30d: gripping portion, 30e, 30f: hole.

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) E02F 9/00 E02F 3/36

Claims (6)

(57) [Claims] A first insertion hole provided in the first member and a first insertion hole;
The connecting pin is inserted into the second insertion hole provided in the second member.
DoHits the,The first member and the second memberOf the insertion hole
A jig for positioning,  A cylindrical body having an outer diameter corresponding to the inner diameter of each of the insertion holes
And a tapered angle that tapers from the fitting portion toward the tip end.
A tapered portion formed in a tapered shape, and a grip portion extending in the axial direction from the fitting portionWhen, An outer diameter provided on the grip portion, the outer diameter being larger than the inner diameter of the insertion hole;
With an annular stopper and A jig for inserting a connecting pin having: 2. A first insertion hole provided in a first member and a first insertion hole.
The connecting pin is inserted into the second insertion hole provided in the second member.
DoHits the,The first member and the second memberOf the insertion hole
A jig for positioning,  A cylindrical body having an outer diameter corresponding to the inner diameter of each of the insertion holes
And a tapered angle that tapers from the fitting portion toward the tip end.
A first tapered portion formed in a tapered shape; and a first tapered portion extending from the first tapered portion toward a distal end.
Taper at a taper angle greater than the taper angle of the
A second tapered portion formed in a tapered shape, and a grip portion extending in the axial direction from the fitting portion.When, An outer diameter provided on the grip portion, the outer diameter being larger than the inner diameter of the insertion hole;
With an annular stopper and A jig for inserting a connecting pin having: 3. A first device provided on a first member of a construction machine.
Connected to the insertion hole and the second insertion hole provided in the second member
Insert a pinHits the,A first member of the construction machine;
Second memberJig for positioning the insertion hole of  A cylindrical body having an outer diameter corresponding to the inner diameter of each of the insertion holes
And a tapered angle that tapers from the fitting portion toward the tip end.
A tapered portion formed in a tapered shape, and a grip portion extending in the axial direction from the fitting portionWhen, An outer diameter provided on the grip portion, the outer diameter being larger than the inner diameter of the insertion hole;
With an annular stopper and A jig for inserting a connecting pin having: 4. A jig for inserting a connecting pin according to claim 1, wherein said jig is formed with a hole penetrating in an axial direction. 5. The first member and the second member are connected by inserting a connecting pin into a first insertion hole provided in the first member and a second insertion hole provided in the second member. A method of connecting, comprising: a fitting portion formed of a columnar body and having an outer diameter dimension corresponding to the inner diameter of the insertion hole; and a taper shape tapering from the fitting portion toward a tip end with a taper angle. The first pin having a tapered portion formed, and a tapered portion of the connecting pin insertion jig having a grip portion provided at the fitting portion, the tapered portion being substantially aligned.
The first insertion hole of the member and the second insertion hole of the second member are inserted into the first insertion hole and the second insertion hole of the second insertion hole on which the connecting pin insertion jig is inserted. A connecting pin insertion method using a connecting pin insertion jig for inserting a connecting pin from the opposite side of the connecting pin. 6. The first member and the second member are inserted by inserting a connecting pin into a first insertion hole provided in the first member and a second insertion hole provided in the second member. A method of connecting, comprising: a fitting portion formed of a columnar body and having an outer diameter dimension corresponding to the inner diameter of the insertion hole; and a taper shape tapering from the fitting portion toward a tip end with a taper angle. The first pin having a tapered portion formed, and a tapered portion of the connecting pin insertion jig having a grip portion provided at the fitting portion, the tapered portion being substantially aligned.
A first insertion hole of the member and a second insertion hole of the second member, and the fitting portion is held at a position straddling the first member and the second member; The first insertion hole and the second
A connecting pin insertion method using a connecting pin inserting jig for inserting a connecting pin from a side of the insertion hole opposite to a side where the connecting pin inserting jig is inserted.