JP2859146B2 - Connector for construction work machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a construction vehicle having a working boom, such as a hydraulic shovel, for easily and quickly attaching or detaching various working attachments such as crushers and buckets to and from a boom tip. The present invention relates to a connection tool for a construction work machine that can be used.

[0002]

2. Description of the Related Art Hitherto, a connecting tool has been used for attaching or detaching various work attachments such as a crusher, a bucket, etc. to a boom tip of a construction vehicle having a work boom such as a hydraulic shovel. ing.

[0003] The main structure of the connecting device is composed of two members: a boom-side connecting device that is mounted on the front end side of the construction boom, and an attachment-side connecting device that is mounted on an attachment side such as a bucket or a crusher. The claw is appropriately moved by the operation of the boom side and is engaged with the shaft through an engagement means comprising a shaft and a movable hook-shaped claw engaged with the shaft. The boom-side connection tool and the attachment-side connection tool are configured to engage with each other, and the claws are operated by a hydraulic cylinder or a spring.

[0004] Further, as another connecting structure between the boom-side connecting tool and the attachment-side connecting tool, a shaft that moves in the axial direction is provided on one side, and a shaft through which the shaft passes or is locked is provided on the other side. A penetrating portion is formed, and the shaft rod penetrates the shaft penetrating portion to complete the connection between the boom-side coupler and the attachment-side coupler, and the boom-side coupler and the attachment-side coupler are separated from each other by the shaft rod. Is removed from the shaft through portion.

[0005]

In order to confirm whether or not the boom-side connector and the attachment-side connector have been securely connected, it is extremely difficult to check from the driver's seat of the construction vehicle. Yes, a worker is required to confirm. In addition, when separating the boom-side connecting tool and the attachment-side connecting tool, the connecting structure is distorted or deformed due to an impact during the work, and the two cannot be easily separated from each other. This is troublesome and time-consuming, and the working efficiency may be extremely reduced.

[0006]

In order to solve the above-mentioned problems, the inventor of the present invention has made intensive studies, and as a result, has found that a locking rod urged by an elastic body is connected to a rear end of the locking rod. A main connecting body provided with an unlocking means comprising a drum for winding the wire wound up and moving the locking rod in a direction opposite to the biasing direction, and a connected body. A boom tip of a construction vehicle having a working boom such as a hydraulic shovel, by using a connecting rod for a construction work machine in which a tip end of a locking rod protrudes toward a connected object side and penetrates and engages by contact. It is possible to easily and quickly attach or remove various work attachments such as crushers, buckets, etc., and to make the attachment state extremely strong.
The present invention has solved the above problem.

[0007]

The main body A is mounted on the tip of the boom b of the construction vehicle, and the body B is mounted on various attachments such as shovels. The locking rod A urged by the elastic body 7 by engaging the main connected body A and the connected body B at a predetermined position and bringing the main connected body A and the connected body B into full contact with each other. ₁
Protrudes and penetrates through the connected object B side and resiliently engages to complete the connection. Further, in order to separate the main connecting member A from the connected member B, the drum 10 is rotated to move the locking rod A ₁ via the wire 11 in the direction opposite to the biasing direction of the elastic member 7. the rod a ₁ tip removed from a predetermined portion of the coupling body B.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings. The present invention comprises a main body A and a body B to be connected, and the main body A is a shovel or the like. The connected object B is mounted on the attachment a side of a digging bucket, a crusher, etc., and the connection between the boom b and the attachment a is connected to the main connected body A with the main connected body A. This is carried out via the connecting body B [FIG.
7 (a) and (b) FIGS. 25 (a) and 25 (b)].

[0009] As shown in FIG.
Locking rod A ₁ and unlocking means A ₂ and the like on one side of the main substrate 1 is mounted, a main mounting portion 26 is formed to be mounted on the boom b tip construction for a vehicle on the other side. Each locking rod A ₁ is 1, 3, 4, 6
As shown in FIG. 7 and the like, the lock head 2 is composed of a lock head 2, a stop flange 3, and a guide tube 4, and the stop flange 3 partially protrudes from the lock head 2. As shown in FIG. 6, the lock head 2 is formed in a rectangular cross section, specifically, a cubic having a rectangular cross section. Some embodiments are formed in a circular shape.

[0010] The locking rod A ₁ is axially substantially parallel to the on the surface of the main substrate 1, and so that the slidable in the axial direction, the locking rod A ₁ is supported by the guide member 6 ,
The said guide member 6 is formed a guide through-hole 6a, the guide tube portion 4 the locking rod A ₁ is inserted slidably. Each locking rod A ₁ is provided with a guide body 6
Is obtained by the support and configured to be reciprocated in the axial direction, the outer periphery of the locking rod A ₁ of the guide tube portion 4, 1, 3, 4, as shown in FIGS. 6 and 7, etc. To
An elastic body 7 such as a coil spring is provided.
Has one end in the longitudinal direction abutting on the corresponding guide body 6, the other end abutting on the stop flange 3, and the stop flange 3 is constantly pressed by the elastic force of the elastic body 7.

The guide body 6 has a locking arm 8 pivotally supported by a pin or the like so as to be freely rotatable. The pivot point is referred to as a pivot point 8p. The locking arm 8 is shown in FIGS.
As shown in FIG. 12 or the like, the locking recess 8a of the notch shape on the end side in the longitudinal direction is formed, locked portion 5 engaging recess 8a is provided in each of the locking rod A ₁ engaged in, against the locking rod a ₁ to the elastic force of the elastic member 7 is intended to be stopped at a predetermined position. Further, the engaging arm 8 is formed with an abutted portion 8b at an appropriate position in the longitudinal direction, and the abutting portion 8b is pressed from the outside, whereby the engaging arm 8 is pivoted. rotates about the fulcrum 8p, disengaged from the engaging portion 5 of the locking rod a _1, moves in the axial direction in the elastic force of the elastic body 7, the the connection between the connecting member B is performed.

As shown in FIGS. 1, 4 and the like, the contacted portion 8b is formed in a protruding shape from an appropriate portion of the locking arm 8, and a push-up portion 25 for releasing the connected member B described later. Contact and press. The locking arm 8 is
As shown in FIGS. 1, 4, and 12, between the main substrate 1 and
Locking spring 9 is provided, be locked in a pressed state by locking spring 9 engaging recess 8a of the locking arm 8 is in the locked portion 5 of each lock rod A ₁ It is always energized to be able to. The lock rod A ₁
Are arranged in parallel on the surface of the main substrate 1, and each locking rod A ₁ is supported by the guide body 6,
It is urged by the elastic body 7 and can be stopped by the locking arm 8 in the unlocked state.

[0013] Next, the unlocking means A ₂ are those pulling back in a direction to release the locking rod A ₁ once was locked state from the lock state. The structure of the unlocking means A ₂ is such that the wire 11 is wound around the drum 10, and by rotating the drum 10, the locking rod A ₁ is pulled in a direction opposite to the biasing direction of the elastic body 7. . The wire 11 is preferably made of steel,
Further, a rope made of a fibrous material or a synthetic resin may be used as long as it has a high tension. The wire 11
Is fixed to the wire fixing hole 10a of the drum 10, the locking head 2 at its other end of the wire 11 the rear end (the axial direction of the locking rod A ₁ of the guide tube portion 4 the locking rod A ₁ And the opposite side). In the connection structure, a through-hole is formed in a connection protrusion 4a protruding from the rear end of the guide cylinder 4, and as shown in FIGS. 1 and 7, the wire 11 is connected to the through-hole in a ring shape. Is what is done.

A drum shaft 13 is formed on the drum 10, and the drum shaft 13 is supported by drum bearings 12, 12, so that the drum 10 is rotatable. Further, the drum shaft 13 is connected to a gear mechanism 14 (see FIG. 2). The gear mechanism 14 is configured such that a large gear 14a and a small gear 14b having different numbers of teeth mesh with each other. By applying a rotational force to the large gear 14a from the small gear 14b side, the gear mechanism 14 has a small force. thereby making it possible to provide a rotational force to pull the locking rod a ₁ in the drum 10 (see FIGS. 7 and 11).

A drive shaft 15 is provided on a small gear 14b of the gear mechanism 14, and the drive shaft 15 is provided with an auxiliary lock mechanism A _5.
Is continuous. The auxiliary lock mechanism A ₅ are the control gear 1
6, a rotation regulating cam 17 and a pressing cylinder 18. The control gear 16 has a large number of regulating teeth 16a,
16a are formed. The rotation regulating cam 17
Are formed with a regulating protrusion 17a, a regulated pressed surface 17b, and an engaging recess 17c. One end of each regulating tooth 16a in the circumferential direction is formed in an arc shape, and the other end is formed substantially perpendicular to the circumference. When the control gear 16 rotates in the direction in which the regulating teeth 16a are formed in an arc shape, the control gear 16 rotates by pushing away the regulating protrusion 17a of the rotation regulating cam 17. Then, even if the control gear 16 attempts to rotate in the direction in which the control tooth 16a is formed vertically, the control tooth 16
The rotation of the control gear 16 is stopped by the engagement of the control projection 16a with the regulating projection 17a. As described above, the control gear 16 can be rotated only in a specific direction, and the rotation in the opposite direction can be stopped only when the rotation regulating cam 17 meshes. Accordingly, when winding the wire 11 to rotate the drum 10 via the gear mechanism 14, the auxiliary lock mechanism A ₅ by the drum 10 to perform the rotation of the winding only, is to lock the rotation of the opposite ( See FIG. 8).

Also, the regulated pressed surface 1 of the rotation regulating cam 17.
The pressing head 18a of the pressing cylinder 18 is brought into contact with the pressing head 7b with an appropriate pressing force. The pressing state causes the restricting projection 17a to always maintain the meshing state with the restricting tooth 16a of the control gear 16. It has become. Only when the control gear 16 rotates in a specific direction, each regulating tooth 16
a pushes up the regulating protrusion 17a and rotates. The pressing head 18a of the pressing cylinder 18 is housed in the cylinder of the pressing cylinder 18 and resiliently protrudes by an elastic body such as a spring (see FIGS. 8 and 9).

The rotation regulating cam 17 has an engagement recess 17.
c, the rotation restricting cam 17 is forcibly rotated to engage the pressing head 18a of the pressing cylinder 18 with the engaging concave portion 17c, so that the restricting projection 17a of the rotation restricting cam 17 and the control gear 16 are formed. Is released (see FIG. 9), and the released state is maintained. In such a released state, the locking rod A
_While the drum 10 in the free state is freely rotated via the wire 11 by the elasticity of the elastic body 7, the locking rod A
₁ can move to the bias of the elastic body 7.

The control gear 16 is provided with a lock release shaft 19, and the rotation regulating cam 17 is provided with an auxiliary lock release shaft 20. The lock release shaft 19 and the auxiliary lock release shaft 20 are provided at their shaft ends. Input portions 19a and 20a are formed, and the input portions 19a and 20a have a structure in which a handle H is detachable from the outside of the apparatus (see FIGS. 3, 7, and 11).

Further, the drum 10 is provided with a winding portion 11w on which the wire 11 is wound a plurality of times in advance (see FIGS. 3, 7, 13 and the like). Specifically, the drum 10
The wire 11 is wound about three times, and the end of the wire 11 is inserted into a wire fixing hole 10 a formed in the drum 10, and the wire 11 is wound around the drum 10 from the wire fixing hole 10 a. It is wound spirally. Since the wire 11 is provided with the wrapping portion 11w, the wrapping portion has a uniform frictional force with respect to the outer peripheral side surface of the drum 10, and the wire 11
The stress can be prevented from being concentrated only on the wire fixing hole 10a, and the durability of the wire 11 can be improved.

Further, there is an embodiment in which a pressing plate 33 is provided on the winding portion 11w of the wire 11 of the drum 10 so as to press the winding portion 11w to an appropriate pressing force. Specifically, the presser plate 33 is formed in a flat plate shape and is fixed to the drum 10 with a fixing tool such as a screw, so that the winding portion 11w is loosened even when the wire 11 is loosened. And maintain a state in which the friction between the wire 11 and the outer peripheral side surface of the drum 10 at the winding portion 11w is always constant [FIG.
(See (a) and (b))].

[0021] than those auxiliary lock mechanism A ₅ to the unlocking means A ₂ as described above is provided, are also present embodiments auxiliary lock mechanism A ₅ in the unlocked unit A ₂ is not provided. Direct unlocking shaft 19 to the drive shaft 15 of the pinion 14b of the gear mechanism 14 in the unlocking means A ₂ in the embodiment is connected (see Fig. 16). Further, in addition to the embodiment in which the axial direction of the drum 10 is mounted horizontally with respect to the main connector A, as shown in FIG.
There is also an embodiment in which the mounting is performed with the 0 axis direction vertical.
In this embodiment, the gear mechanism 14 includes a wheel 14c and a worm 14d. The wheel 14c is provided on the drum shaft 13, and the worm 14d is provided on the drive shaft 15.

[0022] The device provided on the main substrate 1 of the locking such rod A ₁ and unlocking means A ₂ described above, as shown in FIG. 2, are covered and protected by the cover member A _3, specifically housing portion 21 covering member A ₃ is formed in a cubic box shape in
Are formed on the main substrate 1 so as to cover the locking rod A ₁ and the unlocking means A ₂ , and the housing 21 has a lock head as shown in FIGS. Lock head guide through hole 2 so that part 2 can slide freely.
2 are formed.

Further, as shown in FIGS. 1, 4 and the like, a locking connecting plate 28 of the connected object B, which will be described later, is loosely attached to the side wall plate of the housing 21 in which the lock head guide through hole 22 is formed. A flat insertion groove 23 that can be inserted is formed. A release through-hole 24 is formed on the top plate of the housing portion 21, and a contacted portion 8 b of the locking arm 8 exists at a position corresponding to a location where the release through-hole 24 is formed. , The push-up portion 25 for releasing the connected object B through the release through-hole 24.
Has a structure capable of inserting and pressing the contacted portion 8b of the locking arm 8 (see FIG. 5).

A main mounting portion 26 is provided on the main board 1 of the main connector A. More specifically, as shown in FIG. Mounting plate 2
6a, 26a are formed, and mounting holes 26b, 26b are formed in the mounting plates 26a, 26a. When mounting to the end of the boom b, the connecting shaft is connected to the mounting holes 2a, 26a.
6b and 26b and attached to the tip of the boom b.

Next, locking connecting plate 28 on one side of the connecting body sub-base 27 at B is formed, locking head 2 of the locking rod A ₁ is insertable in the locking connection plate 28 Are formed. More specifically, when the main connecting member A and the coupled body B and a proper connection state, the locking connection hole 28a is, as shown in FIGS. 3 and 4, etc., of the locking rod A ₁ perpendicular to the axial direction, and the locking connection hole 28a is in a state opposed to the locking head 2, the locking rod a ₁ is when moving in the axial direction, the locking head 2 passes through the locking coupling hole 28a You can do it.

The release board 25 is provided on the slave board 27.
There is formed, the releasing push-up unit 25 is moved to the covering body A ₃ direction of the main coupling body A, via the release through hole 24 of the cover body A _3, the abutment of the locking arm 8 The configuration is such that the portion 8b can be pressed. In addition, a sub-mounting portion 29 is formed on the sub-substrate 27. Specifically, as shown in FIG. 2, the sub-mounting portion 29 has sub-mounting plates 29a, 29a formed on both sides in the width direction of the sub-substrate 27. , The secondary mounting plates 29a, 29
A is formed with sub-mounting holes 29b, 29b, and when mounted on the attachment a, the connecting shaft is passed through the sub-mounting holes 29b, 29b and mounted on the attachment a.

An engaging body A ₄ is provided on the main connecting body A and the connected body B, and one embodiment of the engaging body A ₄ includes a connecting shaft 30 and a hook 31. Either the main connecting body A or the connected body B is provided with a connecting shaft 30 and the other is provided with a hook 31 which is engageable with the connecting shaft 30 and has an insertion opening 31a. It was done.

In the embodiments shown in FIGS. 1 and 2, a hook 31 is provided on the main connecting member A side, and a connecting shaft 30 is provided on the connecting member B.
The connecting rod 30 has a large diameter and is installed on the same surface of the main board 1 on which the locking rod A ₁ and the lock releasing means A ₂ are provided. The shaft support plates 32 are provided at appropriate intervals from the surface of the main substrate 1. Further, in contrast to the above, there is an embodiment in which a connecting shaft 30 is provided on the main connecting body A side and a hook 31 is provided on the connected body B side (see FIG. 24).

First, the main connecting member A is mounted on the end of the construction vehicle on the boom b side, and the connected object B is connected to the attachment a of a shovel, a crusher or the like. Attach to At this time, in the main connector A,
As shown in FIG. 1, the locking rod A ₁ is left in the state of being fixed to the lock release position by the locking arm 8.

Next, as shown in FIG. 17A, the attachment a side is fixed on the ground, and the boom b is operated from the cab of the construction vehicle to attach the hooks 31, 31 of the main connecting body A to the attachment. The connecting rod 30 is guided from the insertion opening portion 31a of the hook 31 to the connection rod 30 of the connected body B of FIG.

Next, as shown in FIG. 17B, the boom b is operated so that the main connected body A is substantially parallel to the connected body B around the connecting shaft 30. When the main connecting member A comes into contact with the connected object B substantially in parallel, the locking connecting plate 28 of the connected object B fits into the flat insertion groove 23 of the main connecting member A. And connecting hole 28 for locking
a and the lock head 2 face each other, and the lock head 2 can be inserted into the lock connection hole 28a.

[0032] At the substantially same time, the push-up unit 25 for releasing of the coupling body B side, inserted to the release through hole 24 formed in the covering member A ₃ of the main connecting body A, the releasing push-up portion 25 is engaged against the contacted portion 8b of the locking arm 8, remove the locking arm 8 from the engaged portion 5 of the locking rod a _1, the fixed locking rod a ₁ is released, the locking rod a ₁ Is moved in the axial direction by the elastic force of the elastic body 7, the lock head 2 is inserted into the lock connection hole 28a, and the main body A and the body B are connected.
Is completed (see FIGS. 4 and 5).

Next, the connected main body A and the connected body B
The attachment a is placed on the ground in a stable state, the handle H is attached to the input portion 19a of the unlock shaft 19, the unlock shaft 19 is rotated, and the drum The wire 11 is rotated in the winding direction, and the locking rod A _{1 is}
To the side opposite to the biasing direction of the elastic body 7, and FIG.
As shown in FIG. ₁ , the lock head 2 of the lock rod A1 is pulled out from the lock connection hole 28a.

The locking recess 8a of the locking arm 8
When the locked portion 5 of the locking rod A ₁ reaches the location and the main linked body A and the linked body B are separated from each other while rotating about the connecting shaft 30 as shown in FIG. The release push-up portion 25 is separated from the abutted portion 8b of the locking arm 8, and the locking recess 8a and the locked portion 5 are locked,
Locking rod A ₁ is fixed in the unlocked position, the main coupling body separation between A and the coupled body B is completed. Also,
In order to couple the object to be coupled body B is mainly linked body A again, the auxiliary lock mechanism A rotation restricting cam 17 ₅ Remove from the control gear 16 and a release state control gear 16 to a free state.
As a result, the gear mechanism 14 and the drum 10 are also in a free state, and in such a state, when the main connecting body A and the connected body B are connected, the locking rod A ₁ is attached by the elasticity of the elastic body 7. It can move freely in the power direction.

Furthermore, as shown in FIG. 16, the unlocking in the example in section A ₂ is an auxiliary lock mechanism A ₅ is not provided, by rotating the lock release shaft 19 in the handle H drive shaft 15 and the gear mechanism The main connecting member A and the connected member B are separated from each other around the connecting shaft 30 while pulling the drum 10 to the side opposite to the urging direction of the locking rod A ₁ through the connecting rod 14. _{This is} to lock the locking concave portion 8a of the locking arm 8 with the locked portion 5 of FIG. At this time, since the drum 10 is always in a free state, when the locking rod A ₁ moves in the biasing direction by the elastic body 7 when the main connecting body A and the connected body B are connected, the drum 11 is automatically pulled by the wire 11. The drum 10 is designed to rotate.

As described above, the main connecting member A is mounted on the end of the boom b, and the connected member B is mounted on the attachment a side in many cases. However, the present invention is not necessarily limited to this embodiment. The main connected body A may be mounted on the attachment a, and the connected body B may be mounted on the tip of the boom b. Further, the main linked body A and the linked body B are shown in FIG.
As shown in the figure, the end of the boom b and the attachment a
In some cases, it is formed integrally.

Next, on the outer peripheral surface of the lock head 2 of the locking rod A ₁ are present embodiment lubrication groove 2a is formed. By filling the lubrication groove 2a with grease, the lock head 2 can be slid very well into the lock head guide through-hole 22 and the lock connection hole 28a (see FIGS. 19 to 21). . Further, as a means for injecting grease into the lubrication groove 2a, a lubrication port 2b is provided at the tip of the lock head 2, and an lubrication path 2c is formed inside the lock head 2 so that the lubrication port 2b is lubricated. The groove 2a communicates with the groove 2a via an oil passage 2c. Then, when grease is injected from the lubrication port 2b, the lubrication groove 2a around the lock head 2 via the lubrication passage 2c.
It can be filled with grease.

Next, the release through hole 24 of the main connector A
Has an embodiment in which a flexible protective film 35 is provided (see FIGS. 19, 22, and 23). The protective film 35 is provided so as to close the release through-hole 24, and the release push-up 25 of the body B is connected to the protective film 3.
5, the contact portion 8b of the locking arm 8 can be pressed via the protective film 35.
By providing the protective film 35 in the release through-hole 24, dust, dust, moisture, and the like can be prevented from entering the inside of the main connector A from the outside, and the locking arm 8 can be connected to the target B. It can be protected from the shock at the time of connection.

Next, the locking rod A ₁ is present is the embodiment of the type in which the guide tube portion 4 is not provided. In this embodiment, the shaft 34 penetrates through the stop flange 3 of the lock head 2 and both ends in the axial direction of the shaft 34 protrude from the stop flange 3 (FIG. 18). To FIG. 21). Tubular locked portions 5, 5 are mounted on both protruding portions of the shaft 34. The tubular locked portions 5 and 5 may be idle with respect to the shaft 34 or may be fixed. Furthermore, shaft 3
The projecting portion 4 may be used as the locked portions 5 and 5 as they are. The stopping flange 3 is formed with a hollow portion 3a having an opening, and the shaft 34 passes through the hollow portion 3a (see FIGS. 19 and 20).

The shaft 34 that passes through the hollow portion 3a
The stop 11 and the lock head 2 can be moved in the axial direction by the wire 11. Also, the locking arm 8 as described above, the main locking spring 9 is provided between the substrate 1, the locking portion 5 of constantly engaging recesses 8a are each lock rod A ₁
Is biased in a direction to lock in a pressed state. The locking arm 8 has a protruding piece formed near the abutted portion 8b, and a locking spring 9 is connected to the protruding piece. Further, as another embodiment, FIG. 21 (a),
As shown in FIGS. 22 and 23, a compression type locking spring 9 is mounted on the opposite side of the locking concave portion 8a of the locking arm 8, and the locking concave portion 8a is brought into contact with the locked portion 5. It is biased in the direction of contact. In this embodiment, a connecting projection 8c for connecting to the locking spring 9 is formed on the side of the locking arm 8 opposite to the locking recess 8a.

[0041] By way of further example of the unlocking means A ₂ configuration, the unlocking means A _2, which is formed from the drum 10 and the lock releasing shaft 19. The shaft in the same direction as the drum 10 Is provided with a lock release shaft 19. The input portion 19a of the lock release shaft 19 protrudes outside the main connector A. By inserting the handle H into the input portion 19a and operating the handle H,
The rotation of the lock release shaft 19 and the rotation of the drum 10 can be performed (see FIG. 21A).

[0042] In the auxiliary lock mechanism A ₅ in the above embodiment, the unlocking shaft 19 provided with the control gear 16 is directly connected to the drum 10. Then, the auxiliary lock mechanism A ₅ similarly to the rotation restricting cam 17 described above is provided with the auxiliary lock release shaft 20, the input unit 19a to the shaft end of the unlocking shaft 19 and the auxiliary lock releasing shaft 20, 20a is The input portions 19a and 20a are formed so that a handle H can be attached to and detached from the outside of the device (see FIG. 21B).

The top surface portion 28b of the locking connecting plate 28 of the connected object B is configured to abut on the upper surface portion 23a of the flat insertion groove 23 of the main connecting member A. That is, the top of the flat insertion groove 23 is the upper surface 23a,
The top surface portion 28b of the lock connecting plate 28 is in contact with the lock connection plate 3a, and in this state, the lock head 2 penetrates the lock connecting hole 28a.

In the direction in which the main connecting member A and the connected member B are in contact with each other, the top surface portion 28b of the locking connecting plate 28 is always in contact with the upper surface portion 23a of the flat insertion groove 23, and the locking head is locked. The shear force of the flat insertion groove 23 and the lock connecting plate 28 does not act on the portion 2. Therefore, a shearing force acts on the lock head 2 only in a direction in which the main connecting body A and the connected body B separate from each other, so that the load of the external load on the lock head 2 is extremely reduced ( 22 and 23). FIG. 25 shows another type of connection structure between the main connected body A and the connected body B shown in FIG. That is, the main body A and the body A ₄ of the body B to be connected are mounted on the front side of the attachment a.

[0045]

In claim 1, according to the present invention includes a locking rod A ₁ which urges an elastic member 7, the locking rod A ₁ hoisting wire 11 which is connected to the rear end of the locking rod A ₁ Drum 10 for moving in the direction opposite to the biasing direction
A main connecting body A provided the unlocking means A ₂ consisting of,
Consists of a mated coupler body B, the main coupling body A and the lock rod A ₁ tip at the contact with the to-be-connected body B is engaged resilient engagement projecting and penetrating into the connecting member B side construction machine By using the connecting tool, it is possible to efficiently connect and disconnect the main connecting body A and the connected body B, secondly, the connecting strength can be extremely strong, and thirdly, the attachment a Various effects such as being able to be well adapted to a crushing machine or the like that moves violently are exhibited.

To explain the above effect in detail, the locking rod A ₁ provided on the main connected body A is such that when the main connected body A comes into contact with the connected body B, the locking rod A ₁ moves to the connected body B side. By protruding and penetrating, the connection between the main connected body A and the connected body B can be performed almost instantaneously. Further, a drum 10 is provided at a rear portion of the locking rod A ₁ , and the wire 11 wound around the drum 10 is connected to a rear end of the locking rod A ₁ , so that the drum 10 is rotated. it is possible to perform release of the locking rod a ₁ very simply and rapidly. In a state where such a lock rod A ₁ tip by the is engaged resiliently engaging projecting and penetrating into the connecting member B side, even if the engagement has been performed extremely tightly, the rotation of the drum 10 The force becomes extremely large with respect to the engaged state, and can be easily removed.

[0047] Furthermore, connection work between the main coupling body A and the connecting member B, the protruding locking rod A ₁ is in the coupled body B side at only to simply contact the main coupling body A and the object to be coupled body B In addition, it is penetrating, and its operation can be extremely simplified, and reliable connection is possible, so that it is not necessary to check the connection state, and it is also possible to eliminate the need for workers involved in the connection.

The connecting state is such that the locking rod A ₁ provided on the main connecting member A projects and penetrates the connected member B side,
Is intended to perform the connection and therefore is very robust against vibration impact in the horizontal direction and the vertical direction to the axial direction of the locking rod A _1, it can be provided with a durability. Also, it does not act on the work on the generated external force to loosen the locking rod A ₁ (pull direction) direction, to can never loosen apparatus is simplified, lightweight and it is without safe departing.

The biasing in claim 2, the locking rod A ₁ which urges an elastic member 7, the locking rod A ₁ hoisting wire 11 which is connected to the rear end of the locking rod A ₁ and unlocking means a ₂ consisting of the drum 10 is moved in the direction opposite to the direction, and the main connecting body a and the connecting member B provided an auxiliary lock mechanism a ₅ appropriately fixed and air-rotatably controlling the drum 10 consists, as a main connecting member a and the coupled body B locking rod a ₁ tip at contact with is engaged resilient engagement projecting and penetrating into the connecting member B side construction machine for coupling it allows to release the locking rod a ₁ from the locked state and the main connecting body a was released from the connection locked state between the coupling body B, and work to further lockable state again very easily.

[0050] That is, the unlocking means A ₂ the drum 10 for moving the locking rod A ₁ hoisting wire 11 which is connected to the rear end of the locking rod A ₁ in the opposite direction biasing direction, the drum 10 are those constructed from appropriately fixed and idling controllable auxiliary lock mechanism a ₅ Prefecture,
When separating the main connected body A and the connected body B, the drum 1
When the operation of winding 0 is performed, the drum 10 is rotated only in the winding direction, and the rotation in the opposite direction is stopped, so that the winding operation can be efficiently performed. By releasing the auxiliary lock mechanism A _5, the drum 10 is in a free state, the locking rod A ₁ which is biased by the elastic member 7, the main coupling body A and the connecting work between the connecting member B Sometimes it can move in the biasing direction.

[0051] In the third aspect, by which the said unlocking means constantly drum 10 of A ₂ is provided with a winding portion 11w that the wire 11 and multiple turn the construction machine for coupling, the drum 10 Since the wound portion 11w of the wire 11 wound around a plurality of times is in contact with the outer peripheral surface of the drum 10 at a uniform pressure, the wire 11 of the wound portion 11w that contacts the outer peripheral surface of the drum 10 The frictional force becomes uniform, and the durability of the wire 11 can be improved.

[0052] In claim 4, wherein normally the unlocking means A ₂ of the drum 10 the winding portion 11w that the wire 11 and multiple turn provided, and the take-hook 11w position by fixing the holding plate 33 By using the connecting tool for a construction work machine, the holding plate 33 is fixed to the plurality of winding portions 11w of the wire 11 with respect to the drum 10, so that the state of the wire 11 at the winding portion can be maintained in an orderly manner. At the same time, when no tension is applied to the wire 11, loosening of the winding portion 11w of the wire 11 can be prevented, and the durability of the wire 11 can be further improved.

In the fifth aspect, the locking rod A ₁
Since the tip portion is a connecting tool for a construction work machine having a square cross section, rattling at the time of locking can be minimized and a stable connecting state can be achieved.

According to claim 6, in claim 2,
It said unlocking means A ₂ consists unlocking shaft 19 for directly connected to the drum 10 and the drum 10, the auxiliary lock mechanism A ₅ are thereby the control gear 16, the rotation restricting cam 17 and the rotation restricting cam 17 is movable or fixed The control gear 16 is composed of a pressing cylinder 18, and the control gear 16 is a connecting tool for a construction work machine provided on an unlocking shaft 19, so that the internal structure can be simplified and the number of parts can be reduced. , Can be provided at a low price. In addition, by reducing the number of components as described above, a failure or the like is less likely to occur, and even if a failure occurs, replacement of components and the like can be performed easily and quickly.

Next, in claim 7, the outer peripheral surface of the lock head 2 of the locking rod A ₁ to form a lubricating groove 2a, the oil port 2b is provided the lock head 2 distal end, the locking head 2 By providing a lubrication groove 2a communicating from the inside to the lubrication groove 2a, the lubrication groove 2a is filled with grease to thereby provide the lock head 2 with the lubrication groove 2a.
The lock head guide through hole 22 and the lock connection hole 28
a can be slid very well on
Even if the lock head 2 is pressed down by applying a load to the lock head 2, a lubricant such as grease in the lubricating groove 2a acts to enable good sliding.

In the eighth aspect, in the first aspect, a flexible protective film is provided in the release through-hole 24 into which the release push-up 25 of the connected body B is inserted. By providing a connecting device for construction work machines provided with 35, it is possible to prevent dust, moisture and the like from entering the inside of the main connecting member A, and to provide a device such as a locking arm 8 inside the main connecting member A. Can be protected from an impact when the main body A and the body B are connected.

Next, in claim 9 according to claim 1, the top surface 28b of the locking connecting plate 28 of the object B
Is a construction work machine connecting tool abutting on the upper surface portion 23a of the flat insertion groove 23 of the main connecting body A, so that the durability and life of the lock head 2 can be improved. That is, the top surface 2 of the locking connecting plate 28 of the object B
8b is an upper surface portion 23a of the flat insertion groove 23 of the main connector A.
The structure is in contact with That is, the top of the flat insertion groove 23 is an upper surface 23a, and the top surface 28b of the locking connecting plate 28 abuts on the upper surface 23a. Connection hole 28
a. In the direction in which the main connecting body A and the connected body B are in contact with each other, the top surface portion 28b of the locking connecting plate 28 is always in contact with the upper surface portion 23a of the flat insertion groove 23, and On the other hand, flat insertion groove 2
3 and the locking connecting plate 28 do not act on the shearing force. Therefore, the main connecting body A is provided on the lock head 2.
The shear force acts only in a direction in which the lock body 2 and the connected body B are separated from each other, so that the load of the external load on the lock head 2 is extremely reduced.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional side view of a main connected body and a connected body.

FIG. 2 is a schematic perspective view showing a state where a main connected body and a connected body are separated.

FIG. 3 is a vertical sectional view of the present invention.

FIG. 4 is a longitudinal sectional side view showing a state in which a main coupling body and a coupled body are engaged at an engaging body portion.

FIG. 5 is a vertical cross-sectional side view showing a state in which a locking rod protrudes and penetrates a connected object side.

FIG. 6 is a sectional perspective view of a locking rod.

FIG. 7 is a schematic perspective view showing a configuration of a lock rod, a lock release unit, and an auxiliary lock mechanism.

FIG. 8 is a schematic diagram showing a state in which a control gear and a rotation regulating cam are engaged in an auxiliary lock mechanism.

FIG. 9 is a schematic view showing a state in which the engagement of the rotation restricting cam from the control gear is released in the auxiliary lock mechanism.

FIG. 10 is a vertical cross-sectional side view showing that a locking rod moves in a direction opposite to a biasing direction.

FIG. 11 is a longitudinal sectional side view showing a state in which the locking rod has moved in a direction opposite to the biasing direction.

FIG. 12 is a side view showing a state in which the locking rod moves to the side opposite to the biasing direction and is fixed by the locking arm;

13 (a) is a perspective view of a portion where the drum is wrapped, and FIG. 13 (b) is a vertical sectional front view of the portion where the drum is wrapped.

14A is a perspective view of a state in which a holding plate is attached to a winding portion of the drum, and FIG. 14B is a vertical sectional side view of a portion where the drum is wound;

FIG. 15 is a schematic perspective view showing an unlocking means of another embodiment.

FIG. 16 is a longitudinal sectional plan view of an embodiment in which an auxiliary lock mechanism is not mounted.

17A is a schematic view showing a state in which an attachment is attached to a boom according to the present invention. FIG. 17B is a schematic view of an embodiment in which the attachment and the connected body are integrated.

18A is a longitudinal side view showing a main connected body of another embodiment. FIG. 18B is a longitudinal side view showing a connected body of another embodiment.

FIG. 19 is a longitudinal sectional side view showing a state where the main connected body and the connected body of another embodiment are connected to each other.

FIG. 20 is a vertical sectional view showing a main connector of another embodiment.

FIG. 21 (a) is a partially sectional perspective view showing an unlocking means of another embodiment, and (b) is a sectional view showing an auxiliary lock mechanism.

FIG. 22 is an essential part cross-sectional view showing a locked state of the main connected body and the connected body;

FIG. 23 is an essential part cross-sectional view showing an unlocked state between the main connected body and the connected body;

FIG. 24 is a schematic perspective view of an embodiment in which a main connecting body is provided with a connecting shaft and a connected body is provided with a hook.

FIG. 25A is a schematic view showing a state where an attachment is attached to a boom in an embodiment different from FIG. 17; FIG. 25B is a diagram showing a state in which the attachment and the connected body are integrated in an embodiment different from FIG. FIG.

[Explanation of symbols]

A: Main connecting body A ₁ : Locking rod 2 a: Lubrication groove 2 b: Lubrication port 2 c: Lubrication path 7: Elastic body A ₂ : Lock release means 10: Drum 11: Wire 11 w ... Wrapping part A ₅ : Auxiliary lock mechanism DESCRIPTION OF SYMBOLS 16 ... Control gear 17 ... Rotation regulating cam 18 ... Pressing cylinder 19 ... Lock release shaft 20 ... Auxiliary lock release shaft 24 ... Release through hole 25 ... Release push-up 23 ... Flat insertion groove 23a ... Upper surface part B ... Connected Body 28: Locking connection plate 28b: Top surface 33: Holding plate 35: Protective film

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Tomoaki Yamada 314 Chikusa-cho, Hanamigawa-ku, Chiba Co., Ltd. (72) Inventor Kunihiko Matsui 314 Chikusa-cho, Hanamigawa-ku, Chiba Co., Ltd. 72) Inventor Isamu Nagayoshi 314 Chikusa-cho, Hanamigawa-ku, Chiba-shi Inside the Sakado Corporation (72) Inventor Toshiyuki Kuno 314 Chikusa-cho, Hanamigawa-ku, Chiba-shi Inside the Sakado Corporation (58) Cl. ⁶ , DB name) E02F 3/36 E02F 3/40

Claims (9)

(57) [Claims] A locking rod biased by an elastic body;
A main connected body provided with a lock releasing means comprising a drum for winding the wire connected to the rear end of the locking rod and moving the locking rod in a direction opposite to the biasing direction, and a connected body; A coupling for a construction work machine, wherein a tip end of a locking rod projects and penetrates into and out of the connected body by contact between the main connected body and the connected body. 2. A locking rod biased by an elastic body,
Unlocking means comprising a drum for winding up a wire connected to the rear end of the locking rod and moving the locking rod in a direction opposite to the biasing direction, and an auxiliary lock for controlling the drum to be appropriately fixed and idlely rotatable. A main connecting body provided with a mechanism and a connected body, wherein the tip of the locking rod projects and penetrates the connected body side and elastically engages when the main connecting body and the connected body come into contact with each other. A coupling tool for construction work machines characterized by the following. 3. The connection device for a construction work machine according to claim 1, wherein the drum of the unlocking means is provided with a winding portion which is always formed by winding a plurality of wires. 4. A drum according to claim 1 or 2, wherein the drum of the unlocking means is provided with a wrapping portion in which a plurality of wires are normally wound, and a holding plate is fixed to the wrapping portion. A coupling tool for construction work machines characterized by the following. 5. The connecting device for a construction work machine according to claim 1, wherein the locking rod tip has a rectangular cross section. 6. The device according to claim 2, wherein the unlocking means comprises a drum and an unlocking shaft directly connected to the drum, wherein the auxiliary locking mechanism rotates a control gear and the control gear rotates only in a predetermined direction. The control gear is fixed to a lock release shaft, and the rotation control cam is pivotally operated from outside the main coupling body via an auxiliary lock release shaft. A coupling for a construction work machine, characterized in that it is made possible. 7. The lock rod according to claim 1, wherein a lubrication groove is formed on an outer peripheral surface of a lock head of the lock rod, a lubrication port is provided from an end of the lock head, and the lubrication is performed from inside the lock head. A connection tool for a construction work machine, wherein a lubrication passage communicating with a groove is formed. 8. The method of claim 1 or claim 2 Oite, in the main connecting member, the releasing through hole pushing portion for releasing the coupled body is inserted, to become a protective film having flexibility A coupling tool for construction work machines characterized by the following. 9. The construction work according to claim 1, wherein a top surface of the locking connection plate of the connected body comes into contact with an upper surface of the flat insertion groove of the main connection body. Mechanical coupling.