JP3116350U - Pinching device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a clamping device capable of suppressing an impact force acting on an arm when an upper nail and a lower nail are closed and preventing breakage of the arm.
A clamping device 10 includes an upper claw 13 and a lower claw 14 and is attached to a tip portion of an arm 15 of a power shovel. The arm 15 is connected to an inner side of an intermediate position of a base half of the lower claw 14 with a first pin. 16, the outside of the intermediate position of the base half of the upper claw 13 and the tip of the hydraulic cylinder 20 are attached by the second pin 22, and the upper claw 13 and the lower claw 14 are the upper claw members 28 and 29, the lower claw member 25 to 27, and the upper claw members 28 and 29 and the front claw members 25 to 27 are connected at the middle of the front claw members 28 and 29 and the lower claw members 25 to 27. Member 32 and front side lower claw connecting members 30 and 31, and when the upper claw 13 and lower claw 14 are closed, the upper claw members 28 and 29 come into contact with the front side lower claw connecting members 30 and 31, or the lower claw member 26 is It contacts the front upper claw connecting member 32.
[Selection] Figure 1

Description

The present invention relates to a clamping device that includes an upper claw and a lower claw that open and close, and is attached to the tip of an arm of a power shovel.

The thing of the form of FIG. 4 is known as a conventional clamping apparatus (for example, refer patent document 1).
The clamping device 170 includes an upper claw 173 and a lower claw 174 that have base end portions 171 and 172 rotatably connected to each other, bent in a bow shape when viewed from the side, and arranged to face each other. An intermediate position of the proximal half of the upper claw 173 is attached to a distal end portion of an arm 175 of a power shovel (not shown) via a pin 176, and an intermediate position of the proximal half of the upper claw 173 is attached to the distal end of the arm 175. It attaches to the front-end | tip part of the hydraulic cylinder (not shown) attached to this via the pin 177. As shown in FIG. 4, when the upper claw 173 and the lower claw 174 are positioned by closing the hydraulic cylinder, a stopper 178 provided inside the intermediate position of the base half of the upper claw 173 The stopper 179 provided inside the intermediate position of the base half of the lower claw 174 comes into contact.

Design Registration No. 912266

However, in the conventional clamping device 170, the positions of the stoppers 178 and 179 for positioning when the upper claw 173 and the lower claw 174 are closed are intermediate positions between the base halves of the upper claw 173 and the lower claw 174. The impact of the cylinder on the arm 175 via the upper claw 173 and the lower claw 174 when the stoppers 178 and 179 collide when the upper claw 173 and the lower claw 174 are closed due to the short distance from the pin 177. As a result, there is a problem that the arm 175 is broken.

The present invention has been made in view of such circumstances, and it is an object of the present invention to provide a clamping device capable of suppressing the impact force acting on the arm when the upper and lower claws are closed, and preventing the arm from being bent or broken. To do.

A holding device according to the present invention that meets the above-described object includes an upper claw and a lower claw that are pivotally connected to each other and bent in a bow shape when viewed from the side, and are disposed opposite to each other. A clamping device to be attached to the tip of the upper nail, wherein an arm connecting portion to be attached to the arm via a first pin protrudes from an intermediate position of a base half of the lower nail, and a base side of the upper nail A cylinder connecting portion for attaching a distal end portion of a hydraulic cylinder whose base end portion is attached to the intermediate position of the arm through a second pin is provided outside the half intermediate position, and the upper and lower claws are flat with respect to each other. The upper claw member and the lower claw member each having a plurality of positions that are different from each other when viewed, and the adjacent upper claw member and the lower claw member are disposed at intermediate positions of the front half of the upper claw member and the lower claw member. Front upper nail connection to connect nail members Material and a front lower claw connecting member, and when the upper claw and the lower claw are closed, the upper claw member contacts the front lower claw connecting member or the lower claw member is the front upper claw connecting member Abut.

In the clamping device according to the present invention, it is preferable that the upper claw member and the lower claw member each have a box structure, and the front side upper claw connecting member and the front side lower claw connecting member are each formed by a pipe.

In the clamping device according to claim 1 and 2, the upper claw and the lower claw provided at the tip of the arm have a plurality of upper claw members and lower claw members that are different from each other in a plan view. The upper nail and the lower nail are provided with a front upper nail connecting member and a front lower nail connecting member for connecting the adjacent upper nail member and the lower nail member at an intermediate position between the front half of the upper nail member and the lower nail member. Since the upper claw member abuts on the front lower claw coupling member or the lower claw member abuts on the front upper claw coupling member at the time of closing, a plurality of upper claws are mainly formed even if they are impacted. Due to the elastic deformation of the member, the lower claw member, the front upper claw coupling member, and the front lower claw coupling member, the impact energy is absorbed and the transmission of a large impact force to the arm via the upper claw and the lower claw is suppressed. As a result, it is possible to prevent the arm from being bent or broken.

Particularly, in the clamping device according to claim 2, since the upper claw member and the lower claw member have a box structure and the front side upper claw connecting member and the front side lower claw connecting member are formed of pipes, Since the torsional rigidity is large, even if a torsional moment due to an unbalanced load is applied, the amount of deformation of the upper and lower claws can be kept small, and as a result, the period of use can be extended.

Next, embodiments of the present invention will be described with reference to the accompanying drawings for understanding of the present invention.
Here, FIG. 1 is an explanatory view of a holding device according to an embodiment of the present invention, and FIGS. 2A and 2B are a plan view, a side view, and FIG. ) And (B) are a plan view and a side view of the upper claw of the clamping device, respectively.

As shown in FIG. 1 to FIG. 3, a clamping device 10 according to an embodiment of the present invention has base end portions 11 and 12 that are pivotally connected via a pin 11 a, and each has a bow as viewed from the side. The device includes an upper claw 13 and a lower claw 14 that are bent and arranged to face each other, and is attached to the tip of an arm 15 of a power shovel (not shown).

In the clamping device 10, a pair of arm connecting portions 17 and 18 that are attached to the distal end portion of the arm 15 via the first pin 16 are provided on the inner side of the intermediate position of the base half of the lower claw 14. A cylinder connecting portion that is a pair for attaching the distal end portion of the rod 21 of the hydraulic cylinder 20 to which the proximal end portion 19 is attached to the intermediate position of the arm 15 outside the intermediate position of the proximal half of the claw 13 via the second pin 22. 23 and 24 are provided so as to protrude.

In the clamping device 10, the upper claw 13 and the lower claw 14 have a plurality of upper claw members 28 and 29 and lower claw members 25 to 27 that are different in position when viewed from above. , 29 and the lower claw members 25 to 27, the front upper claw connecting member 32 and the adjacent lower claw members 25 to 27, which are pipes connecting the adjacent upper claw members 28 and 29, are provided at intermediate positions of the front side halves. The lower claw connecting members 30 and 31 made of pipes to be connected are provided, and the lower claw member 26 is configured to come into contact with the front upper claw connecting member 32 when the upper claw 13 and the lower claw 14 are closed. These will be described in detail below.

As shown in FIG. 1, the arm 15 has a box structure and is tapered when viewed from the side. A pin 33 is provided at a distal end portion of a swivel post (not shown) of a power shovel at a proximal end portion. A post connecting portion 34 that is rotatably connected to the post is attached. Under the arm 15, in the vicinity of the post connecting portion 34, a tip end portion of a lifting hydraulic cylinder in which a base end portion is provided on the swivel post is rotatably connected via a pin 35. With this configuration, the arm 15 can be lifted and lowered with respect to the turning post by driving the lifting hydraulic cylinder.

A base end portion 19 of the hydraulic cylinder 20 is rotatably connected to a bearing bracket 36 provided on the upper surface of the arm 15 via a pin 37. The proximal end portion of the operating link 38 is rotatably connected to the distal end side of the arm 15 via a pin 38 a, and the distal end portion of the operating link 38 is connected to the distal end portion of the rod 21 of the hydraulic cylinder 20. It is connected via a pin 22 so as to be rotatable.

As shown in FIGS. 2A and 2B, the lower claw 14 is arranged in a direction perpendicular to the longitudinal direction of the lower claw members 25 to 27 and the lower claw members 25 to 27 that are arranged in parallel at intervals. A base side lower claw connecting member 39 made of a pipe that is horizontally disposed and connects the base ends of the lower claw members 25 to 27 and a lower front side that horizontally connects the distal ends of the adjacent lower claw members 25 to 27. Claw coupling members 30, 31 and lower claw side coupling portions 40, 41 which form pairs extending on opposite sides of the lower claw members 25-27 on both sides in the longitudinal direction of the base side lower claw coupling member 39; A pair of arm connecting portions 17, 18 that are arranged with a space between the lower nail side connecting portions 40, 41 and project to the upper nail 13 side (inner side) and provided on the base side lower nail connecting member 39. I have.

The tip of the arm 15 is sandwiched between the arm connecting portions 17 and 18 that form a pair.
At the tip part bent to the upper claw 13 side (inner side) of the lower claw members 25 to 27, tip claw blocks 42 to 44 made of a removable wear-resistant material having a substantially triangular shape with a sharp tip when viewed from the side are provided. It has been.

The lower claw member 25 (same for 26 and 27) has a box structure, is arranged vertically with a space between them, and is elongated in a plan view and has a base end on the outer periphery of the base side lower claw connecting member 39. The inner plate 45 and the outer plate 46 fixed to the upper end portion and the lower end portion, respectively, and both ends in the width direction of the inner plate 45 and the outer plate 46 are vertically connected, and the base end of the base side lower claw connecting member 39 is connected. And side plates 47 and 48 fixed to substantially one half of the outer periphery. On the inner plate 45 on the front side of the lower claw member 25 (same for 26 and 27), friction bars 49 are provided at intervals along the width direction of the inner plate 45.

Each of the arm connecting portions 17 and 18 has a base end disposed substantially in the half of the outer periphery of the base side lower claw connecting member 39 and spaced in the longitudinal direction of the base side lower claw connecting member 39, and the first pin 16 is Mounting plates 51 and 52 in which holes 50 to be inserted are formed, and reinforcing rings 54 and 55 which are fixed to the mounting plates 51 and 52 and in which holes 53 having the same diameter as the holes 50 through which the first pins 16 are inserted are formed. And have.

Each of the lower claw side connecting portions 40 and 41 has a hole 56 through which a pin 11a for connecting the base end portion 11 of the upper claw 13, that is, the upper claw side connecting portions 68 and 69 (see FIG. 3), is formed at the distal end portion. A hole having the same diameter as the hole 56, which is fixed to both ends of the base-side lower claw coupling member 39 in parallel with the mounting plates 57, 58 and the mounting plates 57, 58 through which the pin 11 a is inserted. There are mounting plates 60 and 61 in which 59 is formed, and pinning rings 63 and 64 in which holes 62 having the same diameter as the holes 59 are formed at the distal ends of the mounting plates 60 and 61. Between the mounting plate 60 (61) of the lower claw side connecting portion 40 (41) and the mounting plate 51 (52) of the arm connecting portion 17 (18), the mounting plate 57 of the lower claw side connecting portion 40 (41). A reinforcing member 65 (66) made of a solid round bar is horizontally provided through the center of (58).

As shown in FIGS. 3A and 3B, the upper claw 13 is arranged in a direction orthogonal to the longitudinal direction of the upper claw members 28 and 29 and the upper claw members 28 and 29 that are arranged in parallel at intervals. It is arranged horizontally and consists of a base side upper claw coupling member 67 consisting of a pipe that connects the base ends of the upper claw members 28 and 29, and a pipe that horizontally connects the tip side of the adjacent upper claw members 28 and 29. A pair of upper nail side connecting portions 68 and 69 extending on opposite sides of the upper nail members 28 and 29 on both sides in the longitudinal direction of the front side upper nail connecting member 32 and the base side upper nail connecting member 67 The upper nail side connection portions 68 and 69 are disposed with a space therebetween, and are provided with cylinder connection portions 23 and 24 that form a pair and are provided on the base side upper nail connection member 67 so as to protrude outward. End claw blocks 70 and 71 made of a removable wear-resistant material having a substantially triangular shape with a pointed end when viewed from the side are provided at the end bent to the lower claw 14 side (inside) of the upper claw members 28 and 29. It has been.

The upper claw member 28 (29 is also the same) has a box structure, and is arranged vertically with a space between them. The lower end portion of the outer periphery of the base-side upper claw coupling member 67 has a rectangular shape in plan view and a base end. The inner plate 72 and the outer plate 73 fixed to the upper end portion and the widthwise ends of the inner plate 72 and the outer plate 73 are connected to each other vertically, and the base end is the outer periphery of the base side upper claw connecting member 67. It has side plates 74 and 75 fixed to approximately one half. On the front side of the upper claw member 28 (29 is the same) on the inner plate 72, friction bars 76 are provided at intervals along the width direction of the inner plate 72.

The cylinder connecting portions 23 and 24 are respectively provided with mounting plates 77 and 78 whose base ends are arranged in the longitudinal direction of the base-side upper claw connecting member 67 at substantially one half of the outer periphery of the base-side upper claw connecting member 67. And pin receiving rings 80 and 81 which are fixed to the tips of the mounting plates 77 and 78 and in which a hole 79 through which the second pin 22 is inserted is formed.

Each of the upper claw side connecting portions 68 and 69 has a base end portion fixed to both ends in the longitudinal direction of the base side upper claw connecting member 67, and a base end portion 12 of the lower claw 14, that is, the lower claw side connecting portion 40. , 41 are provided with attachment holes 83 and 84 in a side view formed with holes 82 through which the pins 11a are inserted, and holes 85 and 86 communicating with the holes 82 on both sides of the front ends of the attachment plates 83 and 84. Has reinforcing rings 87 and 88 formed respectively. Between the attachment plate 83 and the attachment plate 84 of the upper claw side connection portions 68 and 69, a reinforcing material 89 made of a pipe is passed through substantially the center of the attachment plates 77 and 78 of the cylinder connection portions 23 and 24. It is provided horizontally.

Further, the upper claws 13 are fixed to the outer surfaces 90 of the mounting plates 77 and 78 provided to face each other, and the rectangular reinforcing plates 91 that connect the upper portions of the base-side upper claw connecting members 67 and the reinforcing members 89, 92 is provided. The reinforcing rings 87 and 88 of the upper claw side connecting portion 68 (69) are sandwiched between the mounting plate 57 (58) and the mounting plate 60 (61) of the lower claw side connecting portion 40 (41). In FIG. 3A, reference numeral 93 denotes a substantially rectangular reinforcing plate fixed to the outer periphery of the base-side upper claw connecting member 67 while connecting the upper ends of the upper claw members 28 and 29 on the base end side. Represents.

Next, the usage method and operation of the clamping device 10 according to an embodiment of the present invention will be described with reference to FIG.
The upper claw 13 and the lower claw 14 having the base end portions 11 and 12 connected to each other via the pin 11a are connected to the distal end portion of the arm 15 of the power shovel, and the arm connecting portions 17 and 18 of the lower claw 14 to the first pin. 16, the tip of the rod 21 of the hydraulic cylinder 20, the cylinder connecting portions 23 and 24 of the upper claw 13, and the tip of the operating link 38 are connected by the second pin 22, and the base of the operating link 38 is connected. The end is connected to the arm 15 by a pin 38a.

The rod 21 of the hydraulic cylinder 20 is reduced and the upper and lower claws 13 and 14 are fully opened as shown by the solid lines.
The power shovel is operated to move to a predetermined work place, and the arm 15 is operated to place the upper claw 13 and the lower claw 14 at a predetermined clamping position.
The rod 21 of the hydraulic cylinder 20 is extended, and the upper claw 13 and the lower claw 14 are closed from the fully open state while being guided by the operation link 38, and the hydraulic cylinder 20 is held and held at a predetermined opening degree before reaching the fully closed state. The object is clamped, and the excavator and the arm 15 are operated to move to a predetermined place to release the clamped object.

However, when the object to be clamped is clamped, for example, when there are few objects to be clamped or when the objects to be clamped are easily deformed, the upper claws 13 and the lower claws 14 are lowered at the fully closed position indicated by the two-dot chain line. The claw member 26 comes into contact with the front-side upper claw connecting member 32. FIG. 1 shows the most recent state in which the upper claw 13 and the claw 14 come into contact with each other. Since the contact position T is far from the point where the hydraulic cylinder 20 acts, that is, from the second pin 22 as compared with the conventional case, the lower claw member 26 is the front upper claw connecting member 32. The upper claw member 26 and the lower claw member 26 connected to the lower claw member 26 and the lower claw member 25 and 27 connected to the lower claw member 26 via the front side lower claw connection members 30 and 31 Due to the elastic deformation of the claw members 28 and 29, the impact energy is absorbed and a large impact force is prevented from being transmitted to the arm 15 via the upper claw 13 and the lower claw 14, and as a result, the arm 15 is prevented from being broken. be able to. Further, since the surface of the inner plate 45 bent in a concave shape of the lower claw member 26 and the outer periphery of the front upper claw coupling member 32 having a circular cross section come into contact with each other, the local stress at the contact portion can be reduced.

The present invention is not limited to the above-described embodiments, and can be modified without changing the gist of the present invention. For example, some or all of the above-described embodiments and modifications can be made. The combination of the pinching devices of the present invention is also included in the scope of the present invention.
In the present embodiment, the lower claw member 26 is configured to come into contact with the front-side upper claw connecting member 32. However, the present invention is not limited to this, and if necessary, the upper claw member is connected to the front-side lower claw connection. It can also be configured to abut against the member.

The upper claw members 28 and 29 and the lower claw members 25 to 27 have a box structure, and the front side upper claw connecting member 32 and the front side lower claw connecting members 30 and 31 are formed by pipes. Accordingly, it can be formed by other than the box structure and the pipe.
The upper nail 13 is provided with two upper nail members 28 and 29, and the lower nail 14 is provided with three lower nail members 25 to 27. However, the upper nail 13 is not limited thereto. The upper nail member can be provided with two lower nail members on the lower nail, and the upper nail can be provided with three or more upper nail members, and the lower nail can be provided with four or more lower nail members.

It is explanatory drawing of the clamping apparatus which concerns on one embodiment of this invention. (A), (B) is the top view and side view of the lower nail | claw of the clamping device, respectively. (A), (B) is the top view and side view of an upper nail | claw of the same clamping device, respectively. It is explanatory drawing which shows the state at the time of fully closing of the upper nail | claw and lower nail | claw of the clamping apparatus which concerns on a prior art example.

Explanation of symbols

10: clamping device, 11: proximal end portion, 11a: pin, 12: proximal end portion, 13: upper nail, 14: lower nail, 15: arm, 16: first pin, 17, 18: arm connecting portion, 19: Base end portion, 20: Hydraulic cylinder, 21: Rod, 22: Second pin, 23, 24: Cylinder connecting portion, 25-27: Lower claw member, 28, 29: Upper claw member, 30, 31: Front side lower claw connecting member, 32: Front side upper claw connecting member, 33: Pin, 34: Post connecting part, 35: Pin, 36: Bearing bracket, 37: Pin, 38: Operating link, 38a: Pin, 39: Base side lower claw connecting member, 40, 41: Lower claw side connecting portion, 42 to 44: Tip claw block, 45: Inner plate, 46: Outer plate, 47, 48: Side plate, 49: Bar, 50: Hole, 51, 52: Mounting plate, 53: Hole, 54, 55: Reinforcing ring, 56: Hole, 57, 5 : Mounting plate, 59: Hole, 60, 61: Mounting plate, 62: Hole, 63, 64: Pinning rimming, 65, 66: Reinforcing material, 67: Base side upper nail connecting member, 68, 69: Upper nail side Connecting part, 70, 71: Tip claw block, 72: Inner plate, 73: Outer plate, 74, 75: Side plate, 76: Bar material, 77, 78: Mounting plate, 79: Hole, 80, 81: Pin receiving ring , 82: hole, 83, 84: mounting plate, 85, 86: hole, 87, 88: reinforcing ring, 89: reinforcing material, 90: outer surface, 91, 92: reinforcing plate, 93: reinforcing plate

Claims (2)

A base device is provided with an upper claw and a lower claw that are pivotally connected to each other, bent in a bow shape in side view, and are arranged to face each other, and is attached to the tip of an arm of a power shovel,
An arm connecting portion that is attached to the arm via a first pin protrudes from the middle position of the base half of the lower claw, and a base end portion is disposed outside the middle position of the base half of the upper claw. Protruding a cylinder connecting portion for attaching the tip of a hydraulic cylinder attached to the intermediate position of the arm via a second pin;
The upper nail and the lower nail have a plurality of upper nail members and a lower nail member that are different from each other in plan view, and an intermediate position between the front half of the upper nail member and the lower nail member, A front side upper claw connecting member and a front side lower claw connecting member that connect the adjacent upper claw member and the lower claw member, and the upper claw member is connected to the front lower claw when the upper claw and the lower claw are closed; A holding apparatus that contacts a connecting member or the lower claw member contacts the front upper claw connecting member. 2. The clamping device according to claim 1, wherein the upper claw member and the lower claw member each have a box structure, and the front side upper claw connecting member and the front side lower claw connecting member are each formed by a pipe. A clamping device characterized by the above.

Images