KR20100081945A - Device for joining two members - Google Patents

Abstract

PURPOSE: A device for connecting two members is provided to improve workability by rapidly and safely performing a detaching work of a connection pin. CONSTITUTION: A device for connecting two members comprises first members(12,13), first pin insertion holes(12C,13C), second members(14,15), second pin insertion holes(14A,15A), left and right connection pins(16,17), and a pin attaching/detaching unit(18). The first members face each other. The first pin insertion holes are formed in the first members. The second members face with the first members. The second pin insertion holes are formed in the second members and can be overlapped with the first pin insertion holes. The left connection pin is inserted into the left first and second pin insertion holes. The right connection pin is inserted into the right first and second pin insertion holes. The pin attaching/detaching unit is arranged between the first members.

Description

2-member connecting device {DEVICE FOR JOINING TWO MEMBERS}

The present invention relates to a two member connecting device which is suitably used to connect two members such as a plurality of booms used in a hydraulic excavator, for example.

In general, when dismantling a structure having a large ground height, such as a high-rise building, a hydraulic excavator provided with a work device for dismantling work is suitably used. The work device for dismantling work usually has a plurality of booleans called multi-boobs, and an arm is provided at the tip side of the uppermost boolean of each of the booleans, and a work tool such as a crusher and a grapple is installed at the tip side of the arm. Will be.

In addition, the multi-buy for dismantling work is configured in a desired length by connecting a plurality of buoys to each other, and each buoy is configured to be connected using a two-member connecting device.

The two-member connecting device according to the prior art connects the left and right brackets provided at one of the two buoys connected to each other with the left and right brackets provided at the other buoy by means of left and right connecting pins. .

In this case, one end side of the left and right links is pivotally coupled to the left and right link pins, respectively, and the other end side of these left and right links is pivoted using a support pin on a support member protruding from the bracket, respectively. It is possibly pinned. And both ends of the hydraulic cylinder are connected to the intermediate part of the longitudinal direction of the left and right links, and when this hydraulic cylinder is expanded and contracted, one end of the link moves to the left and right directions about the support pin, It is the structure which can attach or detach a connection pin with respect to a bracket (patent document 1: Unexamined-Japanese-Patent No. 2005-249185).

However, in the above-described prior art, the support member is fixed to the left and right brackets, and the other end side of the left and right links is rotatably supported by the support member. For this reason, there exists a problem that the work which fixes a support member to a bracket using means, such as welding, is cumbersome.

Moreover, when fixing the support member which supports the other end side of a link to a bracket using means, such as welding, it is difficult to correctly position a support member with respect to the pin hole for connection pins provided in the bracket. Thereby, there exists a problem that it is difficult to attach / detach the connection pin couple | bonded at the one end side of a link to the pin hole of a bracket smoothly according to expansion and contraction of a hydraulic cylinder.

In addition, at one end side of the link, when the link is rotated about the support pin, an elongated hole for horizontally moving the connecting pin is formed, and one end side of the link and the connecting pin are passed through the pin inserted into the long hole. It is configured to connect. Therefore, in order to form a long hole in one end side of the link, complicated processing such as end mill processing is required, and there is a problem that the manufacturing cost of the entire two-member connecting device including the link increases. Moreover, when a long hole is formed in one end side of a link, there exists a problem that the pin inserted in the long hole always wears by sliding contact with the inner peripheral edge of the said long hole.

The present invention has been made in view of the above-described problems of the prior art, and an object thereof is to provide a two-member connecting device that enables a detachable operation of the connecting pin to the first and second members to be smoothly performed.

(One). MEANS TO SOLVE THE PROBLEM In order to solve the said subject, this invention provides the 1st left and right member which face in the left and right directions, the 1st pin insertion hole of the left and right provided in each said 1st member, and the said 1st left and right The left and right second members facing the member, the left and right second pin insertion holes provided in the respective second members and overlapping with each other in the same axis as the first pin insertion hole, and the left first pin insertion. A left connecting pin inserted into the hole and the left second pin insertion hole, a right connecting pin inserted into the right first pin insertion hole and the right second pin insertion hole, and the left and right first members The left connecting pin is detached from the left first pin insertion hole and the left second pin insertion hole, and the right connecting pin is connected to the right first pin insertion hole and the right second pin insertion hole. Detachable pin With a de-mechanism to apply the second member connecting device comprising.

A feature of the present invention is that the pin detachment mechanism is configured such that the pin detachment mechanism has a hydraulic cylinder disposed at a position spaced apart from a position of an axis line of the left and right connecting pins, and a position of an axis line of the left and right connecting pins. A floating link disposed in a floating state capable of moving at least in a direction orthogonal to the axis of the left and right connecting pins at a position spaced in the same direction as the hydraulic cylinder, and the left connecting pin and the hydraulic cylinder via the floating link. And a left link rotatably connected therebetween, and a right link rotatably connected between the right connecting pin and the hydraulic cylinder via the floating link, according to an extended state or a reduced state of the hydraulic cylinder. The first and second members of the left and right are respectively connected to or separated from each other by the connecting pins of the left and right via the left and right links. One way is to configure.

(2). Moreover, in this invention, the said left link and the said right link are provided in the said left and right connection pins, The said hydraulic cylinder and the said floating link are the 1st, 2nd member of the said left side, and the 1st, 1st of the said right side It is arrange | positioned in the state which can move at least in the direction orthogonal to the axis line of the said left and right connection pin between two members, The said pin attachment / detachment mechanism is a structure which cantilever is supported by the said left and right connection pin.

(3). Moreover, in the present invention, the left connection pin is abutted between the first member on the left side and the first member on the right side at a position where the left connection pin comes out of the left second pin insertion hole, and the right connection pin is on the right side. The stopper which abuts at the position which escaped from the right 2nd pin insertion hole was provided.

(4). Moreover, this invention is set as the structure which provided the anti-rotation member which regulates that the said floating link rotates about the said left and right connection pins in the said 1st left and right member.

(5). In addition, the present invention, the hydraulic cylinder is arranged to be stretchable in the same direction as the axis of the connecting pins of the left and right, and the left and right links, the hydraulic cylinder and the floating link with respect to the left and right connecting pins. It consists of one link which connects, respectively.

(6). In addition, the present invention is a configuration in which the floating link is disposed between the left and right connecting pins and the hydraulic cylinder.

(7). In addition, the present invention is a configuration in which the floating link is disposed on the side opposite to the left and right connecting pins with the hydraulic cylinder interposed therebetween.

(8). Moreover, in this invention, the said hydraulic cylinder is arrange | positioned so that it can expand and contract in the direction orthogonal to the axis line of the connecting pin of the left and right, the said floating link is connected to one end of the said hydraulic cylinder, and the said left and right link is said, It consists of the 1st left and right links which connect between a connection pin and the said floating link, and the 2nd left and right links which connect between the other end of the said hydraulic cylinder, and the middle part of the said 1st link, respectively.

(9). Moreover, this invention is set as the structure which connects the said left and right 2nd link and the other end of the said hydraulic cylinder using one common pin.

(10). In addition, the present invention, any one of the left and right second link and the other end of the hydraulic cylinder is connected using one pin, and between the left and right second link and the position of the one pin Is in the configuration to connect using different pins in different positions.

According to the first invention, when the hydraulic cylinder is stretched, the left and right links rotate in the left and right directions with the floating link as a support point, and the left and right connecting pins connected to the left and right links move in the left and right directions. Thus, the left and right connecting pins can be attached to or detached from the first and second members. In this way, the attaching / detaching work of the connecting pins to the first and second members can be easily performed using a hydraulic cylinder, thereby improving workability when connecting or disconnecting the first and second members. Can be. Moreover, since the attachment / detachment operation | movement of the connection pin with respect to a 1st, 2nd member does not need to be performed manually, this attachment and removal operation of this connection pin can be performed quickly and safely.

In this case, the floating link, which is a support point when the left and right connecting pins rotate, is floating with respect to the left and right first members. For this reason, the link is moved in accordance with the expansion or contraction operation of the hydraulic cylinder, so that the left connecting pin connected to the left link can be horizontally moved along the axis lines of the left first pin insertion hole and the left second pin insertion hole. Also, the right connecting pin connected to the right link can be horizontally moved along the axis line between the right first pin insertion hole and the right second pin insertion hole. As a result, the left connecting pin can be smoothly attached and detached from the left first pin insertion hole and the left second pin insertion hole, and the right connecting pin is smoothly attached to the right first pin insertion hole and the right second pin insertion hole. can do.

In addition, by making the floating link serving as the support point of the left and right links floating with respect to the left and right first members, it is not necessary to fix the support points of the left and right links to the left and right first members, respectively. As a result, the operation | work which attaches the support point of each link to a 1st member can be made unnecessary, and the workability at the time of providing a pin attachment / detachment mechanism between 1st member of a left and a right can be improved.

In addition, the floating link connecting the left and right links is made floating with respect to the left and right first members, so that the left and the right link and the right link and the right connecting pin are connected to each other. There is no need to install long holes for horizontally moving the right pin. As a result, manufacturing cost of a left and a right link can be suppressed, and also the wear of the pin etc. which can connect rotatably between a link and a connection pin can be suppressed, and the life of a left and right link can be extended.

According to the second invention, the pin detachment mechanism can can be supported by the left and right connecting pins. Thereby, the member for providing a pin attachment / detachment mechanism between a 1st, 2nd member of a left side and the 1st, 2nd member of a right side can be made unnecessary, and workability at the time of providing a pin attachment / detachment mechanism can be improved. .

According to the third aspect of the invention, the left connecting pin abuts on the stopper at a position exiting from the left second pin insertion hole, and the left connecting pin can be prevented from exiting from the left first pin insertion hole. On the other hand, the right connecting pin also comes into contact with the stopper at the position exited from the right second pin insertion hole, and the right connecting pin can be prevented from exiting from the right first pin insertion hole. Thereby, while the left connecting pin is inserted into the left first pin insertion hole and the right connecting pin is inserted into the right first pin insertion hole, the pin detachment mechanism is held between the left and right first members. Can be.

According to the fourth aspect of the present invention, the pin detachment mechanism can be prevented from protruding to the outside of the left and right first members to interfere with an obstacle or the like and protect the pin detachment mechanism.

According to the fifth aspect of the present invention, when the hydraulic cylinder is stretched and contracted in the same direction as the axis of the left and right connecting pins, the left and right links rotate the left and right connecting pins by rotating the left and right connecting pins as the supporting points. It can be attached or detached from the right second pin insertion hole.

According to the sixth invention, when the hydraulic cylinder is extended, the left and right connecting pins can be pulled out from the left and right second pin insertion holes, and when the hydraulic cylinder is reduced, the left and right connecting pins are connected to the left and right second pins. Can be inserted into the pin insertion hole.

According to the seventh aspect of the invention, when the hydraulic cylinder is reduced, the left and right connecting pins can be pulled out from the left and right second pin insertion holes. When the hydraulic cylinder is extended, the left and right connecting pins are connected to the left and right second pins. Can be inserted into the pin insertion hole.

According to the eighth aspect of the invention, the hydraulic cylinders constituting the pin detachment mechanism are arranged so as to be extensible in a direction orthogonal to the axis lines of the left and right connecting pins, so that even when the distance between the first and the left and right first members is narrow, The pin attachment / detachment mechanism containing a hydraulic cylinder can be easily arrange | positioned between the 1st member of the right side.

According to the ninth aspect of the invention, the number of parts of the pin attachment / detachment mechanism can be reduced by connecting the left and right second links and the three members of the other end of the hydraulic cylinder coaxially using one common pin.

According to the tenth invention, the length of one pin connecting one of the left and right second links and the other end of the hydraulic cylinder and the other pin connecting the left and right second links can be shortened. The strength of these two pins can be increased to extend the life of the pin detachment mechanism.

1 is a front view showing a multi-buoy hydraulic excavator to which a two-member connecting device according to a first embodiment of the present invention is applied;
2 is a front view illustrating a state in which a joint buoy is connected to a lower buoy;
FIG. 3 is a partially broken sectional view of the two-member connecting device according to the first embodiment as seen from arrow III-III in FIG. 2;
Figure 4 is a cross-sectional view of the two-member connecting device in the direction of the arrow IV-IV in Figure 3,
5 is a cross-sectional view similar to FIG. 3 showing a state in which the left and right connecting pins are removed from the left and right second brackets;
6 is a cross-sectional view similar to FIG. 3 showing a state in which the left connecting pin is in contact with the stopper;
7 is a partially broken perspective view showing a pin attachment mechanism and the like according to the first embodiment;
8 is a sectional view similar to FIG. 3 showing a two-member connecting device according to a second embodiment;
9 is a cross-sectional view similar to FIG. 8 showing a state in which the left and right connecting pins are removed from the left and right second brackets;
10 is a cross-sectional view of the floating link, the anti-rotation member, and the like seen from the direction of arrow XX in FIG. 8;
FIG. 11 is a partially broken perspective view showing a pin attachment mechanism and the like according to a second embodiment; FIG.
12 is a sectional view similar to FIG. 3 showing a two member connecting device according to a third embodiment;
FIG. 13 is a cross-sectional view similar to FIG. 12 illustrating a state in which the left and right connecting pins are removed from the left and right second brackets;
FIG. 14 is a cross-sectional view of the floating link, the rotation stop member, and the like seen in the direction of arrow XIV-XIV in FIG. 12;
15 is a cross-sectional view showing a two member connecting device according to a fourth embodiment;
16 is a cross-sectional view of the two-member connecting device viewed in the direction of arrow XVI-XVI in FIG. 15;
17 is a cross-sectional view showing a state in which the left and right connecting pins are removed from the left and right second brackets;
18 is a cross-sectional view showing a state in which the left connecting pin is in contact with the stopper;
19 is a partially broken perspective view illustrating a pin detachment mechanism or the like according to a fourth embodiment;
20 is a cross-sectional view showing a two member connecting device according to a fifth embodiment;
21 is a cross-sectional view showing a state in which the left and right connecting pins are pulled out from the left and right second brackets;
FIG. 22 is a cross-sectional view of the floating link, the first link, the second link, the hydraulic cylinder, one pin, the other pin, and the like in the direction of arrows XXII-XXII in FIG. 20;
23 is a cross-sectional view showing a two member connecting device according to a sixth embodiment;
24 is a cross-sectional view showing a state in which the left and right connecting pins are removed from the left and right second brackets;
It is sectional drawing which shows the modification of a 1st bracket of left and right.

EMBODIMENT OF THE INVENTION Hereinafter, embodiment of the 2 member connection apparatus which concerns on this invention is described in detail, referring an accompanying drawing, taking the case of connecting between the 2nd buoys which comprise the multibooth of a hydraulic excavator as an example.

1 to 10 show a first embodiment of the two-member connecting device according to the present invention.

In the drawing, 1 is a hydraulic excavator, and the hydraulic excavator 1 is a crawler-type lower traveling body 2 which is often possible, and an upper swinging body 3 which is pivotally mounted on the lower traveling body 2. And the multi-boosting work device 4 provided on the front portion side of the upper swing structure 3 so that it can float. The hydraulic excavator 1 is suitably used for dismantling a structure having a large ground height, such as a high-rise building.

Here, the work device 4 is a buoy 5 composed of a lower buoy 5A, a joint buoy 5B, and an upper buoy 5C provided rotatably on the front portion side of the upper swinging body 3, and an upper portion. An arm 7 composed of a middle arm 6 rotatably installed at the distal end side of the buoy 5C, a lower arm 7A and an upper arm 7B rotatably provided at the distal end side of the middle arm 6; It is roughly comprised by the crusher 8 as a work tool provided so that rotation was possible in the front end side of the upper arm 7B.

Here, in the case of installing the joint boom 5B in the lower boom 5A of the boom 5, for example, as shown in FIG. 2, the joint boom 5B is hung by using the hydraulic crane 9 or the like. Raise and connect the lower part 5A and the joint part 5B using the two-member connecting device 11 described later, while the joint part 5B is arranged on the tip side of the lower part 5A. It is.

Next, the two-member connecting device 11 according to the first embodiment will be described in detail. That is, 11 denotes a two-member connecting device provided between the lower pour 5A and the joint pour 5B, and the two-member connecting device 11 is formed at the distal end of the lower pour 5A. It is to connect the proximal side. As shown in Figs. 3 to 7, the two-member connecting device 11 includes the left and right first brackets 12 and 13, the left and right first pin insertion holes 12C and 13C, It consists of the left and right second brackets 14 and 15, the left and right second pin insertion holes 14A and 15A, the left connecting pin 16, the right connecting pin 17, the pin detachment mechanism 18 and the like. have.

12 is a left first bracket serving as a left first member provided on the left side of the tip end portion of the lower portion 5A, and the left first bracket 12 faces the left inner first bracket at regular intervals in the left and right directions. It consists of 12A and the left outer 1st bracket 12B. Here, the left inner first bracket 12A and the left outer first bracket 12B are each formed using a thick steel plate or the like, and are fixed to the distal end of the lower pour 5A by means of welding or the like. It is.

And between the left inner 1st bracket 12A and the left outer 1st bracket 12B, the left 2nd bracket 14 demonstrated later is arrange | positioned. In addition, the left first pin insertion hole 12C, on both ends of the left inner first bracket 12A and the left outer first bracket 12B in the longitudinal direction (the upper and lower directions in FIGS. 3 and 4). 12C) are respectively formed, and the left connecting pin 16 described later is inserted into this left first pin insertion hole 12C in a detachable manner.

13 is a right first bracket as a right first member provided on the right side of the front end portion of the lower portion 5A, and the right first bracket 13 faces the right inner first bracket at regular intervals in the left and right directions. It consists of 13A and the right outer 1st bracket 13B. Here, the right inner first bracket 13A and the right outer first bracket 13B are each formed using a thick steel plate or the like, and are fixed to the distal end of the lower pour 5A by means of welding or the like. It is.

The right second bracket 15 described later is disposed between the right inner first bracket 13A and the right outer first bracket 13B. In addition, the right first pin insertion hole 13C, on both ends of the right inner first bracket 13A and the right outer first bracket 13B in the longitudinal direction (upper and lower directions in FIGS. 3 and 4). 13C) are formed, respectively, and the right connecting pin 17 described later is inserted in these right 1st pin insertion holes 13C so that attachment or detachment is possible.

In this case, the left first pin insertion hole 12C provided in the left inner first bracket 12A and the left outer first bracket 12B of the left first bracket 12, and the right first bracket 13 The right first pin insertion hole 13C provided in the right inner first bracket 13A and the right outer first bracket 13B is disposed on the same axis OO (see FIG. 5).

14 is a left second bracket as a left second member provided on the left side of the proximal end of the joint pour 5B, and the left second bracket 14 is formed by using a thick steel sheet or the like, and the joint pour 5B. Is fixed to the proximal end of the substrate by means of welding or the like. The left second bracket 14 is interposed between the left inner first bracket 12A of the left first bracket 12 and the left outer first bracket 12B. As a result, the left second bracket 14 faces the left inner first bracket 12A and the left outer first bracket 12B in the left and right directions. In addition, the left second pin insertion hole 14A is provided in the left second bracket 14 at a position corresponding to the left first pin insertion hole 12C of the left first bracket 12.

15 is a right 2nd bracket as a 2nd member of the right side provided in the right side of the base end part of the joint pour 5B, This right 2nd bracket 15 is formed using the thick steel plate etc., and the joint pour 5B is shown. Is fixed to the proximal end of the substrate by means of welding or the like. And the right 2nd bracket 15 is interposed between the right inner 1st bracket 13A and the right outer 1st bracket 13B of the right 1st bracket 13, and is arrange | positioned. As a result, the right second bracket 15 faces the right inner first bracket 13A and the right outer first bracket 13B in the left and right directions. The right second pin insertion hole 15A is provided in the right second bracket 15 at a position corresponding to the right first pin insertion hole 13C of the right first bracket 13.

As shown in FIG. 5, the left second pin insertion hole 14A of the left second bracket 14 and the right second pin insertion hole 15A of the right second bracket 15 are the first left. The left axis 1 pin insertion hole 12C of the bracket 12 and the right axis 1 pin insertion hole 13C of the right side 1 bracket 13 are made to overlap with the same axis line (0-0).

16 is a left connecting pin connecting the left first bracket 12 and the left second bracket 14, the left connecting pin 16 is formed in a circumferential shape extending in the left and right directions, 1 is detachably inserted into the left first pin insertion hole 12C of the bracket 12 and the left second pin insertion hole 14A of the left second bracket 14. Therefore, the axis line of the left side connection pin 16 can overlap with the axis line 0-0 same as the left 1st pin insertion hole 12C of the left side 1st bracket 12. As shown in FIG. Here, at the base end side of the left connecting pin 16, a link in which a flange portion 16A having a diameter larger than the hole diameter of the left first pin insertion hole 12C and the left link 21 described later are rotatably provided. The mounting portion 16B is provided.

17 is a right connecting pin for connecting between the right first bracket 13 and the right second bracket 15, and the right connecting pin 17 is formed in a circumferential shape extending in the left and right directions, 1 is detachably inserted into the right first pin insertion hole 13C of the bracket 13 and the right second pin insertion hole 15A of the right second bracket 15. Therefore, the axis line of the right side connection pin 17 can overlap with the axis line O-O same as 13 C of right side 1st pin insertion holes of the right side 1st bracket 13. As shown in FIG. Here, at the proximal end of the right connecting pin 17, a link in which a flange portion 17A having a diameter larger than the hole diameter of the right first pin insertion hole 13C and the right link 24 described later are rotatably provided. The mounting portion 17B is provided.

Next, the pin attachment / detachment mechanism 18 which attaches and detaches two sets of connecting pins 16 and 17 which are arrange | positioned in the up-down direction is demonstrated.

That is, 18 represents two sets of pin detachment mechanisms disposed up and down between the left first bracket 12 and the right first bracket 13, and these pin detachment mechanisms 18 are the first left brackets. The left connecting pin 16 is detached from the left first pin insertion hole 12C of the 12 and the left second pin insertion hole 14A of the left second bracket 14, and the right first bracket ( The right connecting pin 17 is detached from the right first pin insertion hole 13C of the right side 13 and the right second pin insertion hole 15A of the right second bracket 15. And the pin demounting mechanism 18 is comprised by the hydraulic cylinder 19, the floating link 20, the left link 21, the right link 24, etc. which are demonstrated later.

19 is a hydraulic cylinder constituting the pin detachment mechanism 18. The hydraulic cylinder 19 includes a tube 19A, a piston (not shown), a proximal end fixed to the piston, and a distal end side of the tube 19A. It is comprised by the rod 19B which protruded from. In addition, the hydraulic cylinder 19 is separated from the position of the axis OO of the left and right connecting pins 16 and 17, that is, from the axis OO of each of the connecting pins 16 and 17, up and down. It is arrange | positioned in the state separated from the direction in the state which can expand and contract in the same direction as the axis line O-0 of the connecting pins 16 and 17 of the left and right.

In addition, the hydraulic cylinder 19 expands and contracts the rod 19B by supplying pressure oil from the hydraulic source (not shown), and through the left and right links 21 and 24 to be described later, the left and right connecting pins ( 16 and 17) to move left and right.

20 shows a floating link disposed at a position spaced apart up and down from the positions of the connecting pins 16 and 17 on the left and right sides at the axis O-O positions of the connecting pins 16 and 17, respectively. That is, the floating link 20 is arrange | positioned adjacent to the hydraulic cylinder 19, and is parallel. Here, the floating link 20 is not provided at any of the left and right first brackets 12 and 13, and is floating with respect to the left and right first brackets 12 and 13, It extends in the right direction. The floating link 20 moves the left and right connecting pins 16 and 17 connected to the left and right links 21 and 24 described later in the left and right directions along the expansion and contraction of the hydraulic cylinder 19. It is to construct a support point to make it.

Here, the floating link 20 is formed in the shape of an angular column extending in the left and right directions, and the length dimension L of the floating link 20 is the left inner first bracket 12A and the right inner first bracket. It is set slightly smaller than the space | interval of 13A (refer FIG. 3). And the floating link 20 is arrange | positioned between the left and right connecting pins 16 and 17 and the hydraulic cylinder 19, One side (left side) of the left and right direction of the floating link 20 is described later on the left side. It is rotatably connected to the middle position of the link 21 in the longitudinal direction, and the other (right side) of the left and right directions of the floating link 20 rotates to the middle position of the longitudinal direction of the right link 24 demonstrated later. It is possible to connect the configuration.

21 is a left link connecting the left connecting pin 16 and the hydraulic cylinder 19 via the floating link 20, and the left link 21 is along the left and right first brackets 12 and 13. It is formed by two board bodies extended in the direction (upper and lower direction) orthogonal to the axis line OO of each connecting pin 16 and 17 (refer FIG. 7). A pin hole 21B is provided at one end 21A of the left link 21, and the pin 22 is inserted into the link mounting portion 16B of the pin hole 21B and the left connecting pin 16. As a result, one end 21A of the left link 21 is rotatably connected to the left connecting pin 16. The other end 21C of the left link 21 is rotatably connected to the distal end side of the rod 19B constituting the hydraulic cylinder 19 by using the pin 23.

24 is a right link which connects between the right connecting pin 17 and the hydraulic cylinder 19 via the floating link 20, The said right link 24 is the 1st left and right side like the left link 21, too. It is formed by two plate bodies extended upward and downward along the brackets 12 and 13. And pin hole 24B is provided in 24A of one end side of the right link 24, and the pin 25 is inserted in the link installation part 17B of this pin hole 24B and the right connecting pin 17. As shown in FIG. Thereby, one end side 24A of the right side link 24 is connected to the right side connection pin 17 so that rotation is possible. Moreover, the other end side 24C of the right side link 24 is connected so that rotation is possible using the pin 26 to the bottom side of the tube 19A which comprises the hydraulic cylinder 19. As shown in FIG.

Then, one of the left and right directions (left side) of the floating link 20 is pivotally connected to the middle portion in the longitudinal direction of the left link 21 using the pins 27, and the floating link 20 The other (right side) of the left and right directions is rotatably connected to the middle part of the longitudinal direction of the right link 24 using the pin 28.

In this state, a slight gap is formed between the left end of the floating link 20 and the left inner first bracket 12A, and between the right end of the floating link 20 and the right inner first bracket 13A, respectively. The floating link 20 is configured to move between the left inner first bracket 12A and the right inner first bracket 13A in accordance with the expansion and contraction of the hydraulic cylinder 19. In addition, two spacers 29 are disposed between the floating link 20 and the left link 21, and between the floating link 20 and the right link 24 with the floating link 20 interposed therebetween.

Therefore, when the hydraulic cylinder 19 is expanded and contracted, one end side 21A of the left link 21 rotates in the left and right directions using the connecting portion (pin 27) of the floating link 20 as a supporting point. Together, one end 24A of the right link 24 rotates in the left and right directions using the connecting portion (pin 28) of the floating link 20 as a support point.

As a result, when the hydraulic cylinder 19 is reduced, as shown in FIG. 3, the left connecting pin 16 has a left first pin insertion hole 12C and a left second bracket of the left first bracket 12. It is inserted into 14A of 2nd pin insertion holes of the left side. In addition, the right connecting pin 17 is inserted into the right first pin insertion hole 13C of the right first bracket 13 and the right second pin insertion hole 15A of the right second bracket 15. As a result, the left and right first brackets 12 and 13 and the left and right second brackets 14 and 15 can be connected.

On the other hand, when the hydraulic cylinder 19 is extended, as shown in FIG. 5, the left connecting pin 16 is pulled out from the left 2nd pin insertion hole 14A of the left 2nd bracket 14, and is connected to the right side. The pin 17 is pulled out from the right second pin insertion hole 15A of the right second bracket 15. As a result, the left and right second brackets 14 and 15 can be separated from the left and right first brackets 12 and 13.

30 is a stopper which is located in the vicinity of the left and right connecting pins 16 and 17 and is provided between the left first bracket 12 and the right first bracket 13, and the stopper 30 is shown in FIG. Similarly, the left connecting pin 16 abuts at the position exiting from the left second pin insertion hole 14A, and the right connecting pin 17 abuts at the position exiting from the right second pin insertion hole 15A. will be. Here, the stopper 30 is a plate-shaped base plate 30A crossed between the left inner first bracket 12A and the right inner first bracket 13A, and the left and right sides of the base plate 30A. It is comprised by the contact plate 30B which protrudes in the center part of the direction, and is in contact with the link installation part 16B of the left connection pin 16, and the link installation part 17B of the right connection pin 17.

Then, when the hydraulic cylinder 19 extends and the left connecting pin 16 comes out of the left second pin insertion hole 14A, the link installing portion 16B of the left connecting pin 16 is connected to the stopper 30. By contacting the contact plate 30B, the left connecting pin 16 is restrained from exiting from the left first pin insertion hole 12C of the left inner first bracket 12A. In addition, when the hydraulic cylinder 19 extends and the right connecting pin 17 comes out of the right second pin insertion hole 15A, the link mounting portion 17B of the right connecting pin 17 is connected to the stopper 30. By contacting the contact plate 30B, the right connecting pin 17 is configured to suppress the exit from the right first pin insertion hole 13C of the right inner first bracket 13A.

Here, as shown in FIG. 5, when the link installation parts 16B and 17B of the left and right connection pins 16 and 17 contacted the contact plate 30B of the stopper 30, respectively, the left connection is carried out. The pin 16 is inserted only in the left first pin insertion hole 12C of the left inner first bracket 12A, and the right connecting pin 17 inserts the right first pin of the right inner first bracket 13A. The state inserted only in the hole 13C is maintained. Accordingly, the pin detachment mechanism 18 is configured to be held between the left inner first bracket 12A and the right inner first bracket 13A via the left and right connecting pins 16 and 17.

The two-member connecting device 11 according to the first embodiment has the same configuration as described above. Next, the two-member connecting device 11 is used to configure the buoy 5 of the hydraulic excavator 1 using the two-member connecting device 11. The case where the joint pour 5B is provided on the front end side of the lower pour 5A will be described.

First, as shown in FIG. 2, the joint boom 5B is suspended using the hydraulic crane 9, and the base end side of this joint boom 5B is the upper pivot 3 side of the hydraulic excavator 1 side. It is arrange | positioned at the front end side of 5 A of lower pours provided in this.

At this time, as shown in FIG. 5, the pin detachment mechanism 18 inserts the left connecting pin 16 into the left first pin of the left inner first bracket 12A while the hydraulic cylinder 19 is extended. The right connecting pin 17 is inserted into the right first pin insertion hole 13C of the right inner first bracket 13A. As a result, the pin detachment mechanism 18 is held between the left inner first bracket 12A and the right inner first bracket 13A via the left and right connecting pins 16 and 17.

As shown in FIG. 5, between the left inner first bracket 12A and the left outer first bracket 12B provided in the lower pour 5A, the left second bracket 14 provided in the joint pour 5B. ), And between the right inner first bracket 13A and the right outer first bracket 13B installed in the lower boom 5A, the right second bracket 15 provided in the joint pour 5B is inserted. Insert it. In addition, the left second pin insertion hole 14A of the left second bracket 14 and the right second pin insertion hole 15A of the right second bracket 15 are used as the left first of the left first bracket 12. The pin insertion hole 12C and the right first pin insertion hole 13C of the right first bracket 13 overlap on the same axis 0-0.

In this state, as shown in FIG. 3, the hydraulic cylinder 19 is reduced by supplying pressure oil from a hydraulic source (not shown) with respect to the hydraulic cylinder 19 of the pin attachment / detachment mechanism 18. As shown in FIG. Thereby, since the left link 21 rotates counterclockwise by making the connection part (pin 27) of the floating link 20 into a support point, it is connected to one end 21A of this left link 21. The left connecting pin 16 can be inserted into the left first pin insertion hole 12C of the left first bracket 12 and the left second pin insertion hole 14A of the left second bracket 14. On the other hand, since the right link 24 rotates clockwise with the connection site (pin 28) of the floating link 20 as a supporting point, the right link connected to one end 24A of the right link 24 is rotated. The pin 17 can be inserted into the right first pin insertion hole 13C of the right first bracket 13 and the right second pin insertion hole 15A of the right second bracket 15.

In this case, one end 21A of the left link 21 moves in an arc shape around the pin 27. However, the floating link 20 which is floating with respect to the left and right first brackets 12 and 13 can move in accordance with the reduction operation of the hydraulic cylinder 19. As a result, the left connecting pin 16 connected to one end 21A of the left link 21 using the pin 22 has a left first pin insertion hole 12C and a left second pin insertion hole 14A. It can be moved horizontally along the axis OO of. Similarly to this, one end side 24A of the right link 24 moves in an arc shape around the pin 28. However, the floating link 20 in the floating state can move in accordance with the reduction operation of the hydraulic cylinder 19. As a result, the right connecting pin 17 connected to the one end 24A of the right link 24 using the pin 25 has a right first pin insertion hole 13C and a right second pin insertion hole 15A. It can be moved horizontally along the axis OO of.

Then, the left connecting pin 16 is inserted into the left first pin insertion hole 12C and the left second pin insertion hole 14A, so that the left connecting pin 16 is connected to the left first bracket 12 and the left first pin insertion hole 14A. The left second bracket 14 can be connected. In addition, the right connecting pin 17 is inserted into the right first pin insertion hole 13C and the right second pin insertion hole 15A, whereby the right first pin 13 and the right first pin 13 are connected. The second right bracket 15 can be connected.

As a result, the left and right first brackets 12 and 13 installed on the front end side of the lower boom 5A and the left and right second brackets 14 and 15 provided on the proximal side of the joint boom 5B are mounted. , Can be connected by the left and right connecting pins 16 and 17, and the joint buoy 5B can be installed on the tip side of the lower buoy 5A.

Next, in order to remove the joint pour 5B from the front end side of the lower pour 5A, the left and right first brackets 12 and 13 and the joint pour 5B provided on the front end side of the lower pour 5A. The case where the left and right connecting pins 16 and 17 are pulled out from the left and right second brackets 14 and 15 provided on the base end side will be described.

In this case, as shown in FIG. 2, the hydraulic cylinder 19 of the pin demounting mechanism 18 in the state which supported the joint pour 5B provided in the front end side of 5 A of lower pours with the hydraulic crane 9 is shown. E)).

Thereby, as shown in FIG. 5, since the left link 21 rotates clockwise by making the connection site | part (pin 27) of the floating link 20 into a support point, one side of this left link 21 is carried out. The left connecting pin 16 connected to the end side 21A can be taken out from the left second pin insertion hole 14A of the left second bracket 14. On the other hand, since the right link 24 rotates counterclockwise with the connection site (pin 28) of the floating link 20 as a support point, the right link 24 is connected to one end 24A of the right link 24. The connecting pin 17 can be taken out from the right second pin insertion hole 15A of the right second bracket 15.

In this case, for example, the frictional force generated between the right connecting pin 17 and the right second pin insertion hole 15A as compared to the frictional force generated between the left connecting pin 16 and the left second pin insertion hole 14A. In this large case, as shown in FIG. 6, the left connecting pin 16 comes out of the left second pin insertion hole 14A before the right connecting pin 17. At this time, when the link installation portion 16B of the left connecting pin 16 abuts on the contact plate 30B of the stopper 30, the left connecting pin 16 is moved in the extraction direction beyond that. The front end side of the left connecting pin 16 can be inserted into the left first pin insertion hole 12C of the left inner first bracket 12A.

In this way, when the link installation portion 16B of the left connecting pin 16 contacts the abutting plate 30B of the stopper 30, the force when the hydraulic cylinder 19 extends is the right link 24. ), The right connecting pin 17 can be reliably pulled out from the right second pin insertion hole 15A. And the link installation part 17B of the right connecting pin 17 abuts against the contact plate 30B of the stopper 30, and the front end side of the right connecting pin 17 is a right inner 1st bracket ( It can be inserted into 13C of 1st right pin insertion holes of 13A).

In this manner, as shown in FIG. 5, the left connecting pin 16 is pulled out from the left second pin insertion hole 14A of the left second bracket 14, and the right connecting pin 17 is pulled from the right second. It can be pulled out from the right 2nd pin insertion hole 15A of the bracket 15. FIG. As a result, the left and right second brackets 14 and 15 can be separated from the left and right first brackets 12 and 13, and the joint pour 5B can be detached from the lower pour 5A. .

If the joint pour 5B is removed from the lower pour 5A, the hydraulic cylinder 19 is left as it is. That is, the left connecting pin 16 is inserted into the left first pin insertion hole 12C of the left inner first bracket 12A, and the right connecting pin 17 is inserted into the right first of the right inner first bracket 13A. Insert into the pin insertion hole 13C. As a result, the pin detachment mechanism 18 is held in a suspended state between the left inner first bracket 12A and the right inner first bracket 13A via the left and right connecting pins 16 and 17.

In this manner, according to the first embodiment, the pin detachment mechanisms 18 provided between the left and right first brackets 12 and 13 are separated from the left and right connecting pins 16 and 17, and these left and right sides are separated. , Floating floating between the hydraulic cylinder (19) arranged in the same direction as the axis (OO) of the connecting pins (16, 17) on the right and the first brackets (12, 13) on the left and right The link 20, the left link 21 connected between the left connecting pin 16 and the hydraulic cylinder 19 via the floating link 20, and the right connecting pin 17 via the floating link 20. The right link 24 which connected between the hydraulic cylinders 19 is comprised.

Thus, when the hydraulic oil is rapidly delivered and expanded to the hydraulic cylinder 19, one end side 21A, 24A of the left and right links 21, 24 rotates with the floating link 20 as a support point, and these left and right sides are rotated. Left and right connecting pins 16 and 17 connected to one end 21A and 24A of the links 21 and 24 move left and right. Thereby, the left and right connecting pins 16 and 17 can be attached to or detached from the left and right first brackets 12 and 13 and the left and right second brackets 14 and 15.

In this case, since the attachment / detachment work of the left and right connecting pins 16 and 17 can be easily performed using the hydraulic cylinder 19, the first brackets 12 and 13 on the left and right and the second on the left and right sides. Workability at the time of connecting or disconnecting the brackets 14 and 15 can be improved. In addition, since the attachment / detachment work of the left and right connecting pins 16 and 17 does not need to be performed manually, the attachment and detachment work can be performed quickly and safely.

In addition, since the floating link 20, which is a support point when the left and right connecting pins 16 and 17 move, is in a floating state movable with respect to the left and right first brackets 12 and 13, the floating link 20 is floating. The link 20 can move freely in accordance with the expanding or contracting operation of the hydraulic cylinder 19. As a result, the left link pin 16 and the left link pin 16 are rotated relative to the center of the pin 22, so that the left link pin 16 is formed by the left first pin insertion hole 12C and the left first. It is possible to move horizontally along the axis OO of the two-pin insertion hole 14A. In addition, the right link pin 17 and the right second pin insertion hole 13C and the right second pin are formed only by the right link 24 and the right link pin 17 rotating relative to the pin 25. It can move horizontally along the axis line OO of the pin insertion hole 15A. As a result, the left and right connecting pins 16 and 17 can be smoothly attached to and detached from the left and right first brackets 12 and 13 and the left and right second brackets 14 and 15.

In addition, by floating the floating link 20 with respect to the left and right first brackets 12 and 13, the entire pin detachment mechanism 18 can be supported by the left and right connecting pins 16 and 17. Can be. This eliminates the need to fix the support points of the left and right links 21 and 24 to the left and right first brackets 12 and 13 fixedly. As a result, complicated work of providing support points of the left and right links 21 and 24 on the left and right first brackets 12 and 13 of the lower boom 5A, which is a large structure, can be made unnecessary. And workability at the time of installing the pin attachment / detachment mechanism 18 between the right 1st brackets 12 and 13 can be improved.

In addition, the floating link 20 is floated with respect to the left and right first brackets 12 and 13 so that the left link 21 and the left connecting pin 16 are rotated relative to the pin 22. Since only the left connecting pin 16 can be inserted into the left first pin insertion hole 12C and the left second pin insertion hole 14A, it is provided at one end 21A of the left link 21. It is not necessary to make the pin hole 21B into a long hole. In addition, the right link pin 17 and the right link pin 17 are rotated relative to each other around the pin 25, so that the right link pin 17 is connected to the right first pin insertion hole 13C and the right second pin. Since the insertion hole can be inserted into the insertion hole 15A, the pin hole 24B provided on one end 24A of the right link 24 does not need to be a long hole.

As a result, wear of the pin hole 21B formed in the left link 21, the pin 22 inserted into the pin hole 21B, etc. can be suppressed, and the life of the left link 21 can be extended. The wear of the pin hole 24B formed in the right link 24 and the pin 25 inserted into the pin hole 24B can be suppressed to extend the life of the right link 24. In addition, the manufacturing cost of the left and right links 21 and 24 can be reduced as long holes need not be formed in one end side 21A, 24A of the left and right links 21 and 24 by end milling or the like. Can be.

8 to 11 show a second embodiment of the present invention. The feature of this second embodiment is that a rotation preventing member for restricting the rotation of the floating link around the left and right connecting pins is provided. In addition, in 2nd Embodiment, the same code | symbol is attached | subjected to the same component as 1st Embodiment mentioned above, and the description is abbreviate | omitted.

In the figure, 31 denotes a two-member connecting device according to the second embodiment, and the two-member connecting device 31 is substantially the same as the first bracket 12 according to the first embodiment described above. 13) left and right first pin insertion holes 12C and 13C, left and right second brackets 14 and 15, left and right second pin insertion holes 14A and 15A, left connecting pin 16, Although it is comprised by the right connecting pin 17 and the pin detachment mechanism 32 etc. which are demonstrated later, the structure of the pin detachment mechanism 32 differs from the thing by 1st Embodiment.

32 is a pin detachment mechanism arrange | positioned between the left 1st bracket 12 and the right 1st bracket 13, The said pin detachment mechanism 32 is a 2nd instead of the pin detachment mechanism 18 which concerns on 1st Embodiment. It is used for embodiment. And the pin demounting mechanism 32 is comprised by the hydraulic cylinder 19, the left link 21, the right link 24, the floating link 33 demonstrated later, the rotation prevention member 34, etc.

33 represents a floating link disposed at a position spaced apart from the left and right connecting pins 16 and 17 in an upward and downward direction, and the floating link 33 is disposed between the left and right first brackets 12 and 13. It is floating and extends in the left and right directions. In addition, the floating link 33 has left and right connecting pins 16 and 17 connected to one end side 21A and 24A of the left and right links 21 and 24 along the expansion and contraction of the hydraulic cylinder 19. In other words, it constitutes a support point for moving in the right direction.

Here, the floating link 33 is formed in the shape of an angular pillar extending in the left and right directions, and the length dimension of the floating link 33 is the left inner first bracket 12A and the right inner first bracket 13A. It is set slightly smaller than the interval of. Then, one of the left and right directions of the floating link 33 is connected to the middle portion in the longitudinal direction of the left link 21 using the pin 27, and the other of the left and right directions connects the pin 28. It is connected to the middle part of the longitudinal direction of the right link 24 by using it. As shown in Fig. 10 and the like, concave groove portions 33A and 33A cut into bifurcations are formed at both ends of the left and right directions of the floating link 33, respectively. And the rotation preventing member 34 to be described later.

34 is a left and right rotation prevention member provided in the left and right 1st brackets 12 and 13, respectively, These rotation prevention members 34 are provided between the left and right 1st brackets 12 and 13, respectively. The floating link 33 restricts the rotation around the left and right connecting pins 16 and 17.

Here, the anti-rotation member 34 is formed by an angled pillar body extending upward and downward along the left and right first brackets 12 and 13. In addition, the anti-rotation member 34 includes a portion of the inner surface of the left inner first bracket 12A facing the left end of the floating link 33 and a floating link among the inner surfaces of the right inner second bracket 13A. It is fixed to the site | part facing the right end part of (33) using means, such as welding, respectively.

As a result, as shown in FIG. 10, 33A of left and right recessed groove parts provided in the both ends of the floating link 33 engage with the rotation prevention member 34 of the left and right directions, respectively, and the floating link 33 ) Moves freely in the up and down directions along the rotation preventing member 34. That is, the floating link 33 moves between the left and right first brackets 12 and 13 in a direction orthogonal to the axes of the connecting pins 16 and 17 (up and down directions in FIGS. 8 and 9). Can be placed in a floating state.

Therefore, when the hydraulic cylinder 19 of the pin attachment / detachment mechanism 32 expands and contracts, the left and right links 21 and 24 rotate to the left and right directions using the floating link 33 as a support point, and this left and right links Left and right connecting pins 16 and 17 connected to 21 and 24 move left and right. At this time, the floating link 33 is positioned between the left and right first brackets 12 and 13 in a state in which the recessed grooves 33A formed at both ends thereof are engaged with the rotation preventing member 34. It is configured to move to.

The two-member connecting device 31 according to the second embodiment has the configuration as described above, and the basic operation is not significantly different from the two-member connecting device 11 according to the first embodiment.

By the way, in the 2 member connection apparatus 31 which concerns on 2nd Embodiment, the anti-rotation member 34 is provided in the left and right 1st brackets 12 and 13, and the floating link which comprises the pin detachment mechanism 32 is provided. The concave groove portion 33A provided at both ends of (33) is configured to engage the anti-rotation member 34. Thereby, although the floating link 33 can move freely in an up and down direction, it can restrict | limit rotating in arbitrary directions centering on the connecting pins 16 and 17 of the left and right.

12 to 14 show a third embodiment of the present invention. The feature of this third embodiment lies in that the floating link is arranged on the side opposite to the left and right connecting pins with the hydraulic cylinder interposed therebetween. In addition, in 3rd Embodiment, the same code | symbol is attached | subjected to the same component as above-mentioned 1st Embodiment, and the description is abbreviate | omitted.

In the figure, 41 shows a two-member connecting device according to a third embodiment. The two-member connecting device 41 is substantially the same as the first embodiment described above, and the left and right first brackets 12 and 13, the left and right first pin insertion holes 12C and 13C, and the left. By the second bracket 14 and 15 on the right, the second pin insertion holes 14A and 15A on the left and right, the left connecting pin 16, the right connecting pin 17, and the pin detachment mechanism 42 described later. Although it is comprised, the structure of the pin demounting mechanism 42 differs from the thing by 1st Embodiment.

42 is a pin attachment / detachment mechanism arrange | positioned between the left 1st bracket 12 and the right 1st bracket 13, The said pin detachment mechanism 42 is 3rd instead of the pin detachment mechanism 18 which concerns on 1st Embodiment. It is used for embodiment. And the pin demounting mechanism 42 is comprised by the hydraulic cylinder 19, the floating link 43 demonstrated later, the left link 44, the right link 45, the rotation prevention member 47, etc.

43 represents a floating link disposed at a position spaced apart from the left and right connecting pins 16 and 17 in an upward and downward direction, and the floating link 43 is disposed between the left and right first brackets 12 and 13. It is floating and extends in the left and right directions. The floating link 43 moves the left and right connecting pins 16 and 17 connected to the left and right links 44 and 45 to be described later in the left and right directions along the expansion and contraction of the hydraulic cylinder 19. It constitutes a support point to make.

Here, the floating link 43 is formed in the shape of an angular column extending in the left and right directions, and the length dimension of the floating link 43 is a left inner first bracket 12A and a right inner first bracket 13A. It is set slightly smaller than the interval of. The floating link 43 is arranged on the side opposite to the left and right connecting pins 16 and 17 with the hydraulic cylinder 19 interposed therebetween.

44 is a left link connecting between the left connecting pin 16 and the hydraulic cylinder 19 via the floating link 43, and the left link 44 is along the left and right first brackets 12 and 13; It is formed of two plate bodies extending upward and downward. Then, a pin hole 44B is provided at one end side 44A of the left link 44, and the pin mounting hole 16B and the pin 22 of the pin hole 44B and the left connecting pin 16 are inserted. Thus, one end side 44A of the left link 44 is connected to the left connecting pin 16 so as to be rotatable.

Moreover, the other end side 44C of the left link 44 is rotatably connected to the one (left) of the left and right directions of the floating link 43 using the pin 27. Moreover, the intermediate part of the longitudinal direction of the left link 44 is connected to the front end side of the rod 19B which comprises the hydraulic cylinder 19 so that rotation is possible using the pin 23. As shown in FIG.

45 is a right link connecting the right connecting pin 17 and the hydraulic cylinder 19 via the floating link 43, and the right link 45 also follows the first brackets 12 and 13 on the left and right sides. It is formed of two plate bodies extending upward and downward. A pin hole 45B is provided at one end 45A of the right link 45, and the pin 25 is inserted into the link hole 17B of the pin hole 45B and the right connecting pin 17. Thereby, one end side 45A of the right side link 45 is connected to the right side connection pin 17 so that rotation is possible.

The other end 45C of the right link 45 is rotatably connected to the other (right side) in the left and right directions of the floating link 43 using the pin 28. Moreover, the intermediate part of the longitudinal direction of the right link 45 is connected to the bottom side of the tube 19A which comprises the hydraulic cylinder 19 so that rotation is possible using the pin 25. As shown in FIG. In addition, two spacers 46 are arranged between the floating link 43 and the left link 44, and between the floating link 43 and the right link 45 with the floating link 43 interposed therebetween.

Therefore, when the hydraulic cylinder 19 is extended, as shown in FIG. 12, the left connecting pin 16 has the left first pin insertion hole 12C of the left first bracket 12 and the left second bracket ( 14 is inserted into the left second pin insertion hole 14A. In addition, the right connecting pin 17 is inserted into the right first pin insertion hole 13C of the right first bracket 13 and the right second pin insertion hole 15A of the right second bracket 15. Thereby, the left and right first brackets 12 and 13 and the left and right second brackets 14 and 15 can be connected.

On the other hand, when the hydraulic cylinder 19 is reduced, as shown in FIG. 13, the left connecting pin 16 is pulled out from the left second pin insertion hole 14A of the left second bracket 14, and the right connection is performed. The pin 17 is pulled out from the right second pin insertion hole 15A of the right second bracket 15. As a result, the left and right second brackets 14 and 15 can be separated from the left and right first brackets 12 and 13.

47 is a left and right rotation prevention member provided in the left and right 1st brackets 12 and 13, respectively, These rotation prevention members 47 are provided between the left and right 1st brackets 12 and 13, respectively. The floating link 43 of the pin attachment / detachment mechanism 42 restricts rotation about the left and right connecting pins 16 and 17.

Here, the anti-rotation member 47 has a concave groove portion 47A having a U-shaped cross section as shown in FIG. 14. The anti-rotation member 47 is fixed to the inner surface of the left inner first bracket 12A and the inner surface of the right inner first bracket 13A by means of welding or the like, respectively. It extends upward and downward along the first brackets 12 and 13. The left and right ends of the floating link 43 are engaged with the recessed groove portions 47A of the anti-rotation member 47 in the left and right directions, respectively, and the floating link 43 is the anti-rotation member 47. It can be freely moved with respect to the up and down directions along.

The two-member connecting device 41 according to the third embodiment has the configuration as described above, and the basic operation thereof is not significantly different from the two-member connecting device 11 according to the first embodiment.

However, in the two-member connecting device 41 according to the third embodiment, the floating link 43 is disposed on the side opposite to the left and right connecting pins 16 and 17 with the hydraulic cylinder 19 interposed therebetween. . For this reason, by extending the hydraulic cylinder 19, as shown in FIG. 12, the left and right connecting pins 16 and 17 are moved to the left and right first brackets 12 and 13 and the left and right second brackets 14. , 15). On the other hand, by reducing the hydraulic cylinder 19, as shown in FIG. 13, the left and right connecting pins 16 and 17 can be taken out from the 2nd bracket 14 and 15 of the left and right sides.

In this way, when the hydraulic cylinder 19 with greater force acts on the left and right connecting pins 16 and 17, the left and right connecting pins 16 and 17 are moved to the left and right first brackets 12. , 13) and the left and right first brackets 12 and 13 and the left and right second brackets 14 and 15 can be inserted into the left and right second brackets 14 and 15. Connection pins 16 and 17 can be used for reliable connection.

In addition, the two-member connecting device 41 according to the third embodiment is provided with both ends of the floating link 43 constituting the pin attachment / detachment mechanism 42 on the left and right first brackets 12 and 13. By engaging the recessed groove portion 47A of the rotation preventing member 47, it is possible to reliably regulate that the pin detachment mechanism 42 rotates in any direction around the left and right connecting pins 16 and 17. have.

Next, Figs. 15 to 19 show a fourth embodiment of the present invention. A feature of the fourth embodiment lies in that the hydraulic cylinder is arranged to be extensible in a direction orthogonal to the axis lines of the left and right connecting pins. In addition, in 4th Embodiment, the same code | symbol is attached | subjected to the same component as 1st Embodiment mentioned above, and the description is abbreviate | omitted.

In the figure, 51 denotes a two-member connecting device according to a fourth embodiment. The two-member connecting device 51 is substantially the same as the first embodiment described above, and the left and right first brackets 12 and 13, the left and right first pin insertion holes 12C and 13C and the left. By the second bracket 14, 15 on the right, the second pin insertion holes 14A, 15A on the left and right, the left connecting pin 16, the right connecting pin 17, and the pin detachment mechanism 52 described later. Consists of. However, in 4th Embodiment, the structure of the pin attachment / detachment mechanism 52 differs from the thing by 1st Embodiment.

52 denotes a pin attachment / detachment mechanism disposed between the left first bracket 12 and the right first bracket 13. This pin detachment mechanism 52 is used for 4th embodiment instead of the pin detachment mechanism 18 which concerns on 1st Embodiment. The pin attachment / detachment mechanism 52 is formed by the hydraulic cylinder 53, the floating link 54, the left and right first links 56 and 62, the left and right second links 59 and 65 described later. Consists of.

53 is a hydraulic cylinder, and this hydraulic cylinder 53 is arrange | positioned at the position spaced apart up and down from the position of the axis line O-O of the left and right connection pins 16 and 17. FIG. And the hydraulic cylinder 53 is comprised by the tube 53A, the piston (not shown), and the rod 53B, and pressure oil is supplied and drained from a hydraulic source (not shown), and the connecting pins 16 and 17 are carried out. It expands and contracts in the direction orthogonal to the axis OO.

54 is a floating link disposed at a position spaced apart upward and downward from the positions of the left and right connecting pins 16 and 17, and the floating link 54 is formed of the first and second brackets 12 and 13 of the left and right sides. It is not provided in any of them, and is floating with respect to these left and right 1st brackets 12 and 13.

Here, the floating link 54 is formed of two triangular plate bodies facing each other with spacers (not shown) having a width larger than the outer diameter of the hydraulic cylinder 53 (tube 53A). . In addition, the length dimension L of the left and right directions of the floating link 54 is set slightly smaller than the space | interval of the left inner 1st bracket 12A and the right inner 1st bracket 13A, and the floating link 54 A slight gap is formed between the left end of the side and the left inner first bracket 12A, and between the right end of the floating link 54 and the right inner first bracket 13A (see FIG. 15). Accordingly, the floating link 54 is configured to move between the left inner first bracket 12A and the right inner first bracket 13A in accordance with the expansion and contraction of the hydraulic cylinder 53.

The bottom side of the tube 53A serving as one end of the hydraulic cylinder 53 is rotatably connected to the intermediate portion in the left and right directions of the floating link 54 via the pin 55. Moreover, the other end side 56B, 62B of the left and right 1st links 56 and 62 demonstrated later are connected to both ends of the left and right direction of the floating link 54 so that rotation is possible, respectively. Reference numeral 54 constitutes a support point of these left and right first links 56 and 62.

56 is a left first link connecting the left connecting pin 16 and the floating link 54, and the left first link 56, together with the left second link 59 described later, relates to the present invention. It constitutes the left link. Here, the left first link 56 is formed of two plates extending upward and downward along the left and right first brackets 12 and 13 (see FIG. 19). One end side 56A in the longitudinal direction of the left first link 56 is connected to the link attachment portion 16B of the left connecting pin 16 via the pin 57. Moreover, the other end side 56B in the longitudinal direction of the left first link 56 is connected to the floating link 54 via the pin 58.

59 is a left 2nd link which connects between the middle part 56C of the longitudinal direction of the left 1st link 56, and the front-end | tip of the rod 53B of the hydraulic cylinder 53, The said left 2nd link 59 Is a transmission force of the hydraulic cylinder 53 to the left first link 56, and is formed of two plates extending in the left and right directions while facing each other at a constant interval (see Fig. 19).

Here, one end side 59A in the longitudinal direction of the left second link 59 is connected to the middle portion 56C of the left first link 56 via the pin 60, and the left second link 59 is connected. The other end side 59B of the longitudinal direction of is connected to the front-end | tip of the rod 53B which is the other end of the hydraulic cylinder 53 via the pin 61.

62 is a right first link connecting the right connecting pin 17 and the floating link 54, and the right first link 62 forms a right link together with the right second link 65 described later. It is. Here, the right 1st link 62 is formed by the two board bodies extended in the longitudinal direction of the left and right 1st brackets 12 and 13. One end side 62A in the longitudinal direction of the right first link 62 is connected to the link attachment portion 17B of the right connecting pin 17 via the pin 63. In addition, the other end side 62B in the longitudinal direction of the right first link 62 is connected to the floating link 54 via the pin 64.

65 is a right 2nd link which connects between the middle part 62C of the longitudinal direction of the right 1st link 62, and the front-end | tip of the rod 53B of the hydraulic cylinder 53, The said right 2nd link 65 is By transmitting the stretching force of the hydraulic cylinder 53 to the right first link 62, similarly to the left second link 59, by means of two plates extending in the left and right directions while facing each other at regular intervals. Formed.

Here, one end side 65A of the longitudinal direction of the right side 2nd link 65 is connected to the middle part 62C of the right side 1st link 62 via the pin 66, and the right side 2nd link 65 The other end side 65B of the longitudinal direction of is connected to the tip of the rod 53B which is the other end of the hydraulic cylinder 53 via the pin 61.

In the fourth embodiment, the other end side 59B of the left second link 59, the other end side 65B of the right second link 65, and the rod 53B of the hydraulic cylinder 53 are provided. Three members of the tip are configured to be rotatably connected via one common pin 61.

Therefore, when the hydraulic cylinder 53 is expanded and contracted, the stretching force of the hydraulic cylinder 53 is transmitted to the left first link 56 via the left second link 59 and via the right second link 65. It is delivered to the right first link 62. For this reason, the left first link 56 rotates in the left and right directions using the connecting portion (pin 58) of the floating link 54 as a supporting point, and the right first link 62 is the floating link. The connecting portion (pin 64) of 54 is rotated in the left and right directions as a supporting point.

Accordingly, when the hydraulic cylinder 53 is reduced, as shown in FIG. 15, the left connecting pin 16 connected to one end 56A of the left first link 56 is the left first bracket 12. Is inserted into the left first pin insertion hole 12C and the left second pin insertion hole 14A of the left second bracket 14. In addition, the right connecting pin 17 connected to one end side 62A of the right first link 62 has a right first pin insertion hole 13C and a right second bracket 15 of the right first bracket 13. Is inserted into the right second pin insertion hole 15A. As a result, the left and right first brackets 12 and 13 and the left and right second brackets 14 and 15 can be connected.

On the other hand, when the hydraulic cylinder 53 is extended, as shown in FIG. 17, the left connecting pin 16 is pulled out from the left 2nd pin insertion hole 14A of the left 2nd bracket 14, and is connected to the right side. The pin 17 is pulled out from the right second pin insertion hole 15A of the right second bracket 15. As a result, the left and right second brackets 14 and 15 can be separated from the left and right first brackets 12 and 13.

Then, when the hydraulic cylinder 53 extends and the left connecting pin 16 comes out of the left second pin insertion hole 14A, the link installing portion 16B of the left connecting pin 16 is connected to the stopper 30. Abuts on the contact plate 30B. As a result, the left connecting pin 16 is kept inserted only in the left first pin insertion hole 12C of the left inner first bracket 12A. In addition, when the hydraulic cylinder 53 extends and the right connecting pin 17 comes out of the right second pin insertion hole 15A, the link mounting portion 17B of the right connecting pin 17 is connected to the stopper 30. Abuts on the contact plate 30B. As a result, the right connecting pin 17 is kept inserted only in the right first pin insertion hole 13C of the right inner first bracket 13A. Accordingly, the pin detachment mechanism 52 is configured to be held between the left inner first bracket 12A and the right inner first bracket 13A while the cantilever is supported by the left and right connecting pins 16 and 17. It is.

67 is a left and right rotation prevention member provided in the left and right 1st brackets 12 and 13, respectively, These each rotation prevention member 67 is the floating link 54 of the pin attachment / detachment mechanism 52, It is to regulate the rotation around the left and right connecting pins (16, 17).

Here, the anti-rotation member 67 is formed of an angled pillar extending upward and downward along the left and right first brackets 12 and 13, and the inner and right inner side of the left inner first bracket 12A. It is fixed to the inner surface of 13 A of 2nd brackets using means, such as welding, respectively. And the two plate bodies which comprise the floating link 54 fit the left and right rotation prevention member 67, respectively, and the floating link 54 engages with the rotation prevention member 67 in the state. It is configured to move upward and downward along the rotation preventing member 67.

The two-member connecting device 51 according to the fourth embodiment has the configuration as described above, and the basic operation thereof is not significantly different from the two-member connecting device 11 according to the first embodiment.

By the way, the two-member connecting device 51 according to the fourth embodiment is a direction in which the hydraulic cylinder 53 of the pin detachment mechanism 52 is perpendicular to the axis OO of the left and right connecting pins 16 and 17. It is set as the structure arrange | positioned so that expansion and contraction is possible (upward and downward direction of FIG. 15, FIG. 16). Thereby, even when the space | interval of the left and right 1st brackets 12 and 13 is narrow, the pin attachment / detachment mechanism 52 which includes the hydraulic cylinder 53 between these left and right 1st brackets l2 and 13 is carried out. Can be easily arranged.

Moreover, the other end side 59B of the left side 2nd link 59, the other end side 65B of the right side 2nd link 65, and the three members of the front end of the rod 53B of the hydraulic cylinder 53, By connecting coaxially via one common pin 61, the component score of the pin detachment mechanism 52 can be reduced.

20 to 22 show a fifth embodiment of the present invention. A characteristic of this fifth embodiment is that one of the left and right second links and the other end of the hydraulic cylinder are connected using one pin, and the left and right second links are connected using different pins. Is in. In addition, in 5th Embodiment, the same code | symbol is attached | subjected to the same component as 1st Embodiment mentioned above, and the description is abbreviate | omitted.

In the figure, 71 denotes a two-member connecting device according to a fifth embodiment, and the two-member connecting device 71 includes the first brackets 12 and 13 on the left and right, and the first pin insertion holes 12C on the left and right. , 13C), left and right second brackets 14 and l5, left and right second pin insertion holes 14A and 15A, left connecting pin 16, right connecting pin 17, and pin detachment mechanisms described later. 72, etc. are comprised.

72 is a pin detachment mechanism in accordance with the fifth embodiment, and the pin detachment mechanism 72 includes a hydraulic cylinder 73, a floating link 74, left and right first links 76 and 81, and a left side described later. And the second links 79 and 84 on the right side.

73 is a hydraulic cylinder, and this hydraulic cylinder 73 is comprised by the tube 73A, the piston (not shown), and the rod 73B, and the pressure oil is supplied to the hydraulic cylinder 73 from the hydraulic source, and is left. , Stretching in a direction orthogonal to the axis of the connecting pins (16, 17) of the right.

74 is a floating link which is arrange | positioned at the position separated | separated up and down from the position of the left and right connection pins 16 and 17, The said floating link 74 is attached to the 1st bracket 12 and 13 of the left and right sides. Is floating. Here, similarly to the fourth embodiment, the floating link 74 is formed of two triangular plate bodies facing each other with the hydraulic cylinder 73 interposed therebetween, and the left and right directions of the floating link 74 are positioned. The bottom side of the tube 73A of the hydraulic cylinder 73 is connected to the intermediate part via the pin 75.

76 is a left first link connecting the left connecting pin 16 and the floating link 74, and the left first link 76 forms a left link together with the left second link 79 described later. It is. Here, one end side 76A in the longitudinal direction of the left first link 76 is connected to the link attachment portion 16B of the left connecting pin 16 via the pin 77. Moreover, the other end side 76B in the longitudinal direction of the left first link 76 is connected to the floating link 74 via the pin 78.

79 is a left second link connecting between the left first link 76 and the rod 73B of the hydraulic cylinder 73, and one end side 79A in the longitudinal direction of the left second link 79 is formed of the left first link. The middle portion 76C of the one link 76 is connected via the pin 80. In addition, the other end side 79B in the longitudinal direction of the left second link 79 is connected to the right second link 84 described later via another pin 87.

81 is a right first link connecting the right connecting pin 17 and the floating link 74, and the right first link 81 forms a right link together with the right second link 84 described later. It is. Here, one end side 81A in the longitudinal direction of the right first link 81 is connected to the link attachment portion 17B of the right connecting pin 17 via the pin 82. In addition, the other end side 81B in the longitudinal direction of the right first link 81 is connected to the floating link 74 via the pin 83.

84 is a right 2nd link which connects between the right 1st link 81 and the rod 73B of the hydraulic cylinder 73, and one end side 84A of the longitudinal direction of the said right 2nd link 84 is a right side The middle portion 81C of the first link 81 is connected via a pin 85. Moreover, the middle part 84B of the longitudinal direction of the right 2nd link 84 is connected to the front-end | tip of the rod 73B of the hydraulic cylinder 73 via one pin 86, and the right 2nd link 84 The other end side 84C in the longitudinal direction of is connected to the other end side 79B of the left second link 79 via the other pin 87.

That is, in the fifth embodiment, the rod 73B of the hydraulic cylinder 73 and the two members of the right second link 84 are connected via one pin 86, and the left second link 79 and the right side are connected. Two members of the second link 84 are connected via another pin 87 at a position different from the one pin 86. Thereby, as shown in FIG. 22, the length dimension S of each pin 86 and 87 can be shortened.

88 is a left and right rotation prevention member provided in the left and right 1st brackets 12 and 13, respectively, These rotation prevention members 88 are the inner side and the right inner side of the left inner 1st bracket 12A. It is fixed to the inner surface of the second bracket 13A. Each rotation preventing member 88 is configured to guide the floating link 74 so as to be movable upward and downward.

The two-member connecting device 71 according to the fifth embodiment has the configuration as described above, and the basic operation thereof is not significantly different from the two-member connecting device 11 according to the first embodiment.

By the way, the pin attachment / detachment mechanism 72 of the two-member connecting device 71 according to the fifth embodiment uses two pins of the rod 73B of the hydraulic cylinder 73 and the right second link 84 as one pin ( 86, and two members of the left second link 79 and the right second link 84 are connected via the other pin 87. For this reason, for example, the three ends of the rod 73B of the hydraulic cylinder 73, the left second link 79 and the right second link 84 are connected to each other by one long pin. In comparison with the case, the length dimension S of each pin 86 and 87 can be shortened. As a result, the strength of the pins 86 and 87 can be increased, and the life of the pin detachment mechanism 72 can be extended.

23 and 24 show a sixth embodiment of the present invention. A characteristic of the sixth embodiment is that, when the hydraulic cylinder is extended in contrast to the above-described fourth and fifth embodiments, when the left and right connecting pins are inserted into the left and right second pin insertion holes, the hydraulic cylinder is reduced. The left and right connecting pins are drawn out from the left and right second pin insertion holes. In addition, in 6th Embodiment, the same code | symbol is attached | subjected to the same component as above-mentioned 1st Embodiment, and the description is abbreviate | omitted.

In the drawing, 91 denotes a two-member connecting device according to a sixth embodiment, and the two-member connecting device 91 is the first bracket 12, 13 on the left and right, and the first pin insertion holes 12C on the left and right. 13C), left and right second brackets 14 and 15, left and right second pin insertion holes 14A and 15A, left connecting pin 16, right connecting pin 17, and the pin detachment mechanism (92) and the like.

92 is a pin attachment / detachment mechanism according to a sixth embodiment, and the pin attachment / detachment mechanism 92 is a hydraulic cylinder 93, a floating link 94, left and right first links 96 and 102, left, described later. And the second links 99 and 105 on the right side.

93 is a hydraulic cylinder, and this hydraulic cylinder 93 is comprised by the tube 93A, the piston (not shown), and the rod 93B, and the connecting pin 16 of the left and right by supplying pressure oil from a hydraulic source is drained. , 17) to stretch in a direction perpendicular to the axis.

94 is a floating link disposed at a position spaced apart upward and downward from the positions of the left and right connecting pins 16 and 17, and the floating link 94 is a face facing each other with a hydraulic cylinder 93 interposed therebetween. It is formed of a triangular plate body of a hawk and is floating with respect to the left and right first brackets 12 and 13. And the bottom side of the tube 93A of the hydraulic cylinder 93 is connected to the intermediate part of the left and right direction of the floating link 94 via the pin 95.

96 is a left first link connecting between the left connecting pin 16 and the floating link 94, and the left first link 96 forms a left link together with the left second link 99 described later. It is. Here, one end side 96A of the left first link 96 is connected to the link attachment portion 16B of the left connection pin 16 via the pin 97. Moreover, the other end side 96B of the left first link 96 is connected to the floating link 94 via the pin 98.

99 is a left second link connecting the left first link 96 and the rod 93B of the hydraulic cylinder 93, and one end side 99A of the left second link 99 is the left first link. The middle part 96C is connected to the part 96C via the pin 100, and the other end side 99B is connected to the tip of the rod 93B of the hydraulic cylinder 93 via the pin 101.

102 is a right first link connecting the right connecting pin 17 and the floating link 94. The right first link 102 connects the right link together with the right second link 105 described later. To construct. Here, one end side 102A of the right first link 102 is connected to the link attachment portion 17B of the right connecting pin 17 via the pin 103. The other end 102B of the right first link 102 is connected to the floating link 94 via the pin 104.

105 is a right second link connecting between the right first link 102 and the rod 93B of the hydraulic cylinder 93, and one end side 105A of the right second link 105 is the right first link. The middle part 102 is connected to the site 102C via the pin 106, and the other end side 105B is connected to the tip of the rod 93B of the hydraulic cylinder 93 via the pin 101.

Therefore, when the hydraulic cylinder 93 is extended, as shown in FIG. 23, the left connecting pin 16 has the left first pin insertion hole l2C and the left second bracket (of the left first bracket 12). 14 is inserted into the left second pin insertion hole 14A. The right connecting pin 17 is inserted into the right first pin insertion hole 13C of the right first bracket 13 and the right second pin insertion hole 15A of the right second bracket 15. It is.

On the other hand, when the hydraulic cylinder 93 is reduced, as shown in FIG. 24, the left connecting pin 16 is pulled out from the left second pin insertion hole 14A of the left second bracket 14, and the right connection is performed. The pin 17 is configured to be pulled out from the right second pin insertion hole 15A of the right second bracket 15.

In addition, 107 is a left and right rotation prevention member provided in the left and right 1st brackets 12 and 13, respectively, These each rotation prevention member 107 has the floating link 94 whose left and right connection pins ( 16, 17) to regulate the rotation.

The two member connecting device 91 according to the sixth embodiment has the configuration as described above, and the basic operation thereof is not significantly different from the two member connecting device 11 according to the first embodiment.

By the way, the pin attachment / detachment mechanism 92 of the two-member connecting device 91 according to the sixth embodiment, in contrast to the above-described fourth and fifth embodiments, has the left and right sides at the time of the expansion of the hydraulic cylinder 93. Left and right connection to the first pin insertion holes 12C and 13C of the first brackets 12 and 13 and the second pin insertion holes 14A and 15A of the left and right second brackets 14 and 15. Pins 16 and 17 can be inserted.

In addition, in said 1st Embodiment, the left 1st bracket 12 is comprised by two board bodies, the left inner 1st bracket 12A and the left outer 1st bracket 12B, and the right 1st bracket The case where (13) is comprised with two board bodies, a right inner side 1st bracket 13A and a right outer side 1st bracket 13B, is illustrated. However, this invention is not limited to this, For example, like the modification shown in FIG. 25, the left 1st bracket 12 'and the right 1st bracket 13' comprised by one board body are used. You may also do it. This also applies to the second to sixth embodiments.

In addition, the two-member connecting device 11 according to the first embodiment described above is the lower pour 5A, the joint pour 5B, and the upper pour 5C constituting the pour 5 of the hydraulic excavator 1. The case where it is used for the connection part of the lower part 5A and the joint part 5B is illustrated. However, the two-member connecting device 11 according to the present invention is not limited to this, and for example, the lower arm 7A constituting the connecting portion of the joint pour 5B and the upper pour 5C, and the arm 7. ) And the upper arm 7B may be used. This also applies to the second to sixth embodiments.

In each of the above-described embodiments, the left and right first brackets 12 and 13 are provided on the lower pour 5A constituting the pour 5 of the hydraulic excavator 1, and the left pour 5B is provided. The case where the right 2nd brackets 14 and 15 are installed is illustrated. However, the present invention is not limited to this, and for example, the first brackets 12 and 13 on the left and right sides are provided at the joint pour 5B, and the second brackets 14 on the left and right are attached to the lower pour 5A. 15) may be provided.

In addition, in said 1st, 2nd, 3rd embodiment, the case where the hydraulic cylinder 19 which expands and contracts in the same direction as the axis line OO of the left and right connection pins 16 and 17 is illustrated, In the fourth, fifth, and sixth embodiments, the case where the hydraulic cylinders 53, 73, 93 which expand and contract in the direction orthogonal to the axis OO of the left and right connecting pins 16, 17 is illustrated. have. However, this invention is not limited to this, For example, you may make it the structure which uses the hydraulic cylinder which expands and contracts with respect to the axis O-O of the left and right connection pins 16 and 17. FIG.

11, 31, 41, 51, 71, 91: two-member connecting device
12, 12 ': left first bracket (left first member)
12C: Left first pin insertion hole
13, 13 ': Right 1st bracket (right 1st member)
13C: Right first pin insertion hole
14: left second bracket (left second member)
14A: Left second pin insertion hole
15: right second bracket (right second member)
15A: Right 2nd pin insertion hole 16: Left connection pin
17: Right connecting pin
18, 32, 42, 52, 72, 92: pin release mechanism
19, 53, 73, 93: hydraulic cylinder
20, 33, 43, 54, 74, 94: floating link
21, 44: left link 24, 45: right link
30: stopper
34, 47, 67, 88, 107: anti-rotation member
56, 76, 96: left first link (left link)
59, 79, 99: left second link (left link)
62, 81, and 102: right first link (right link)
65, 84, 105: right second link (right link)
86: one pin 87: another pin

Claims (10)

A first member of left and right facing in the left and right directions, a first pin insertion hole of left and right provided in each of the first members, and a second member of left and right facing the first member of the left and right; In the left and right second pin insertion holes provided in the respective second members and overlapping with each other on the same axis as the first pin insertion hole, and in the left first pin insertion hole and the left second pin insertion hole. A left connection pin to be inserted, a right connection pin inserted into the right first pin insertion hole and the right second pin insertion hole, and a first member of the left and right sides, the left first pin insertion hole and And a pin detachment mechanism for detaching the left connecting pin from the left second pin insertion hole and detaching the right connecting pin from the right first pin insertion hole and the right second pin insertion hole. absence In the connection device,
The pin detachment mechanism,
A hydraulic cylinder disposed elastically at a position separated from the positions of the axes of the left and right connecting pins;
A floating link disposed in a floating state capable of moving at least in a direction orthogonal to the axis of the left and right connecting pins, at a position spaced apart from the axis of the left and right connecting pins in the same direction as the hydraulic cylinder;
A left link rotatably connected between the left connecting pin and the hydraulic cylinder via the floating link;
A right link rotatably connected between the right connecting pin and the hydraulic cylinder via the floating link,
The first and second members of the left and right are connected to or separated from each other by the connecting pins of the left and right via the left and right links according to the extended state or the reduced state of the hydraulic cylinder. 2 member connecting device. The method of claim 1,
The left link and the right link are provided on the left and right connecting pins, and the hydraulic cylinder and the floating link are at least between the first and second members on the left side and the first and second members on the right side. And a pin detachment mechanism configured to support the cantilever by the left and right connecting pins, wherein the pin detachment mechanism is configured to be movable in a direction orthogonal to the axis of the left and right connecting pins. The method of claim 1,
Between the first member on the left side and the first member on the right side, the left connection pin abuts at a position out of the left second pin insertion hole, and the right connection pin is on the right second pin insertion hole. A two-member connecting device, characterized in that the stopper abuts at a position exited from the configuration. The method of claim 1,
And the anti-rotation member for restricting the floating link from rotating around the left and right connecting pins in the left and right first members. The method of claim 1,
The hydraulic cylinder is arranged to be stretchable in the same direction as the axis of the connecting pins of the left and right,
And the left and right links are constituted by one link connecting the hydraulic cylinder and the floating link to the left and right connecting pins, respectively. 6. The method of claim 5,
And the floating link is configured to be disposed between the left and right connecting pins and the hydraulic cylinder. 6. The method of claim 5,
The floating link is a two-member connecting device, characterized in that configured to be positioned on the opposite side to the left and right connecting pins with the hydraulic cylinder between. The method of claim 1,
The hydraulic cylinder is arranged to be stretchable in a direction orthogonal to the axis lines of the left and right connecting pins,
The floating link connects to one end of the hydraulic cylinder,
The left and right links are the left and right first links connecting the connecting pins and the floating link, and the left and right second links connecting the other end of the hydraulic cylinder and the intermediate portion of the first link. A two-member connecting device, each of which is configured by a link. The method of claim 8,
The left and right second links and the other end of the hydraulic cylinder are configured to be connected by using one common pin. The method of claim 8,
One of the left and right second links and the other end of the hydraulic cylinder are connected using one pin, and the left and right second links are different from each other at a position different from the position of the one pin. Two-member connecting device, characterized in that the configuration is made using a connection.

Images