JPH086151Y2 - Clamp device - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a clamp device for gripping a long pillar material for gripping and transferring a solid or hollow long pillar material having various diameters, and particularly to a pipe for oil drilling equipment. The present invention relates to a clamp device suitable for gripping.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 17, a bridge crane 101 which is movable above a pipe 103 of a pipe storage provided on a pipe rack 102 on one side of a drilling tower 100 is provided.
18 has hooks 104 that can be moved up and down as shown in FIG. 18, and has hook-type pipe clamp devices that engage the hooks 104 with both ends of the pipe 103 to suspend and convey the pipe 103. Pipe transfer device and Fig. 1
As shown in FIG. 9, a clamp for pipe pipes 105A, 105B, and 105C for clamping pipes 103 having different diameters is provided on the bridge crane 101 so that the pipes can be moved up and down, and the pipe 103 is clamped and conveyed by a pipe clamp device suitable for the diameter. A pipe conveying device having a continuous pipe clamp device has been put into practical use.

Japanese Laid-Open Patent Publication No. 55-161191 discloses two types of pipe clamp devices provided in an oil drilling rig and capable of clamping pipes of various diameters. In the pipe clamp device of FIGS. 20 and 21 of this publication, a pair of left and right jaw members are attached to the clamp body so as to be openable and closable,
These jaw members can be opened and closed by a hydraulic motor via a rack and pinion mechanism, and the pipe is clamped by the pair of jaw members. In the pipe clamp device of FIGS. 32 and 33 of the above publication, a pair of left and right jaw members are attached to the clamp body so as to be openable and closable, and a V-shaped pipe pressing portion is formed on one jaw member. A jaw metal is hinged to the tip of the other jaw member on the other side which is short, and the pair of jaw members can be opened and closed by a hydraulic motor via a rack and pinion mechanism. It is configured to clamp the pipe with.

Japanese Utility Model Application Laid-Open No. 50-119209 discloses a clamp device which is attached to an undulating beam of a civil construction work vehicle and is used for carrying wood or the like. In this clamp device, a pair of left and right curved root-side claw members are attached to the lower ends of the clamp bodies so as to be openable and closable via front and rear pins, respectively, and a curved tip is provided at the lower ends of the respective root-side claw members. A left and right side 1 that attaches side claw members to open and close by swinging through front and rear pins and drives a pair of left and right root side claw members to open and close
A pair of hydraulic cylinders for opening and closing are provided, and a relative bending hydraulic cylinder for swingingly driving the tip side claw member with respect to each root side claw member is provided.

Japanese Utility Model Publication No. 3-24711 discloses a pipe clamp device for clamping pipes of various diameters in an oil rig. In this pipe clamp device, the clamp body is provided with the first, second and third clamp bodies.
A pair of left and right parallel link mechanisms composed of link members is provided, a sliding member is attached to the second link member so as to be vertically swingable, and a clamp member is connected to the lower end of the sliding member so as to be rotatable about the longitudinal axis. A pair of left and right hydraulic cylinders for opening and closing the parallel link mechanism, a hydraulic cylinder for vertically swinging the sliding member, and a pair of hydraulic cylinders for rotationally driving the clamp member are provided at the lower end of the clamp body. The abutting portion and the pair of left and right clamp members are configured to grip the pipe.

[0006]

In the hook-type pipe clamp device, when the hook is engaged with the end of the pipe, the protective cap for protecting the connecting screw portion provided at the end of the pipe is removed or the hook is removed. Is required to be engaged with the end of the pipe, which requires a great deal of labor and time, is dangerous, and is likely to damage the threaded portion with the hook. The clamp-equipped pipe clamp device has a problem in that the number of types and the number of installed pipe clamp devices increase, and the equipment cost becomes very expensive. JP-A-55-161191
In the pipe clamp device of the publication, since the distance from the pipe pressing portion of the pair of jaw members to the clamp body is not variable, it is not possible to increase the fluctuation range of the diameter of the pipe to be clamped so much. The total width of the pipe clamp device increases in proportion to the maximum diameter of the pipe to be clamped, the manufacturing cost becomes expensive because high precision mechanical parts are used for the rack and pinion mechanism and the sliding guide part, and the jaw member Since the hollow shape of the pipe gripping part is fixed, it is not suitable for gripping a non-circular external pillar material other than the pipe.

In the clamp device disclosed in Japanese Utility Model Laid-Open No. 50-119209, the minimum diameter of the pipe that can be reliably gripped by using both the root-side claw member and the tip-side claw member is determined by the installation interval of the root-side claw members. Since it is limited, the pipe having a diameter smaller than this is grasped at two points between the curved portions of the base side claw member and cannot be firmly and surely grasped. In addition, depending on the diameter of the pipe, the tip side claw member may not be useful at all, and the gripping point of the pipe is 2 to 5 points depending on the diameter so that pipes of various diameters can be reliably and stably gripped. Is difficult. Moreover, it is difficult to symmetrically drive the left and right claw members in a symmetrical manner, and the hydraulic control system becomes complicated in order to perform the synchronous drive. In the pipe clamp device disclosed in Japanese Utility Model Publication No. 3-24711, the manufacturing cost is high because the structure is complicated as a whole, and a minimum of four hydraulic cylinders are required to grip pipes of various diameters. Therefore, the hydraulic system and its control system are complicated, and the distance between the center of the pipe and the center of the clamp body changes depending on the diameter of the pipe, which complicates the position control of the clamp body when gripping the pipe. . The object of the present invention is to provide a large variable width of the long column member to be clamped,
It can be firmly gripped at 3 points, the mechanical structure is simple and small,
The purpose of the present invention is to provide a clamp device having a simple driving means.

[0008]

A clamp device according to a first aspect of the present invention is a clamp device for gripping a long pillar material for gripping and transferring solid or hollow long pillar materials having various diameters. A vertically oriented guide portion is formed in the center of the main body, and a sliding member is provided in the guide portion so that the sliding member can be raised and lowered between a position where the sliding member protrudes downward by a predetermined length and a position where the sliding member retracts upward. the upper pressing member for pressing the top of the long pillar to the lower end portion is provided in the left and right pair of clamp jaws members for opening and closing the left and right is pin-coupled at each upper portion on the left side lower part and the right-side lower portion of the clamp body And a lower pressing portion for pressing the lower parts of both side portions of the long column member at the lower part of these clamp claw members.
A line connecting the upper end and the lower retainer in the middle of the upper half member
Connecting part that protrudes a certain distance to the side opposite to the upper pressing member
And a pair of left and right synchronizing link members that respectively connect the connecting portions of the pair of left and right clamp claw members to the lower end portion of the sliding member, each of which is an upper pressing member according to downward movement or upward movement of the sliding member. And a pair of left and right synchronizing link members for synchronously operating the upper pressing member and the pair of clamp claw members so that the pair of left and right lower pressing portions approach and separate from each other, and the sliding member is vertically moved with respect to the clamp body. It is characterized in that a driving means for doing so is provided.

A clamp device according to a second aspect of the present invention is a clamp device for gripping a long pillar material for gripping and transferring a solid or hollow long pillar material having various diameters. Vertical guide parts are formed, and sliding members of inverted gate type in front view are provided on these guide parts so as to be able to move up and down between a position protruding a predetermined length downward from the guide part and a position retracted upward, and sliding. the upper pressing member for the lower central portion of the member holding the upper portion of the long pillar provided on the respective vertical middle portion in the left-side lower part and the right-side lower portion of the clamp body
A pair of left and right clamp claw members that are pin-connected to each other to open and close to the left and right are provided, and lower presser portions for pressing the lower parts of both sides of the long column member are provided below the clamp claw members.
At the upper end of the pair of clamp claw members, the pin connecting part
Predetermined distance to the side opposite to the upper presser member from the line connecting the foot
The protruding coupling part is provided respectively, a synchronous link member pair of left and right respectively connected to an upper end portion of the right and left sliding members connecting portions of the left and right pair of clamp jaws members, movement and upward movement downwards of the sliding member According to the above, a pair of left and right synchronizing link members for synchronously operating the upper pressing member and the pair of clamp claw members are provided so that the upper pressing member and the pair of left and right lower pressing portions approach and separate from each other. On the other hand, a driving means for raising and lowering the sliding member is provided.

[0010]

In the clamp device according to the first aspect of the present invention, when the sliding member provided on the vertical guide portion of the clamp body so as to be able to move up and down is driven downward by the drive means, the sliding member descends, A pair of left and right clamp claw members connected to the sliding member by a pair of left and right synchronizing link members move in the closing direction in synchronization with the sliding member, and the left and right upper pressing member provided at the lower end of the sliding member Since the pair of left and right lower presser parts of the pair of clamp claw members come close to each other, the upper presser member holds the upper part of the long pillar member and the left and right pair of lower presser parts holds the lower part of both sides of the long pillar member. Each of them can be clamped, and it is possible to firmly clamp at three positions of the outer periphery of the long column member at approximately three equal positions. Moreover, since the upper pressing member and the pair of left and right lower pressing portions are configured to approach and separate from each other, both the small-diameter long column member and the large-diameter long column member can be reliably clamped in the same state. On the other hand, when the sliding member is driven upward by the driving means with respect to the clamp body, the upper holding member and the pair of left and right lower holding portions are separated from each other, which is opposite to the above, and thus the clamp can be released. A pair of clans
The upper end of the claw member to the lower left and lower right of the clamp body.
Since the pins are connected to each other, the pair of clamp claw members are closed.
When the pair of clamp claw members and the clamp body are
Don't cross In the middle of the upper half of the pair of left and right clamp claw members
Section above the line that connects the upper end and the lower presser
Each connecting part was provided with a certain distance projecting to the side opposite the material.
Therefore, make the length of the synchronization link member sufficiently large, and
Amplify the amount of movement of the connecting part in the opening / closing direction at the position of the lower presser part
Increase the amplification effect and increase the variable width of the long column diameter.
can do. In this way, it is possible to clamp from a long pillar material having a diameter of about twice the lifting stroke of the sliding member to a long pillar material having a sufficiently small diameter, so that the variable width of the diameter of the long pillar material to be clamped can be made sufficiently large. Clamp body,
Since the number of parts such as the sliding member, the upper pressing member, the pair of left and right clamp claw members, and the pair of left and right synchronizing link members is small, the structure of the clamp device can be remarkably simplified and downsized, and the drive means A simple structure in which the sliding member is driven up and down is sufficient, and its control system is also simple.

In the clamp device according to claim 2,
Basically, it operates in the same manner as the clamp device of claim 1. That is, when the inverted gate type sliding member, which is vertically movable on the left and right sides of the clamp body, is driven downward by the drive means with respect to the clamp body, the sliding member descends, The pair of left and right clamp claw members connected by the pair of left and right synchronizing link members move in the closing direction in synchronization with the sliding member, and the pair of left and right upper pressing members provided at the center of the lower end of the sliding member and the pair of left and right members. Since the pair of lower left and right lower pressing parts of the clamp claw member come close to each other, the upper pressing member clamps the upper part of the long column member, and the pair of left and right lower pressing parts clamps the lower parts of both sides of the long column member respectively. Therefore, it is possible to firmly clamp the three places of the outer circumference of the long column member at approximately three equal positions. Moreover, since the upper pressing member and the pair of left and right lower pressing portions are configured to approach and separate from each other, it is possible to reliably clamp the small-diameter long column member and the large-diameter long column member in the same state.
Especially on the middle part of the vertical direction of the pair of left and right clamp claw members.
Pin on the lower left side and the lower right side of the clamp body, respectively.
One pair of left and right clamp claw members because they are connected
Pair of clamp claws when the clamp claw members are closed
Material does not interfere with the clamp body. And a pair of left and right
At the upper end of the clamp claw member,
Project a predetermined distance from the line connecting
And connecting the left and right pair of clamp claw members.
One pair on the left and right on the upper end of the sliding member
Since they are connected with each other by the synchronization link members,
Make the length of the material large enough, and
Greater amplification effect that amplifies the amount of movement at the position of the lower presser
It is possible to increase the variable width of the long column diameter.
It The synchronizing link member of claim 1 functions as a tension member during clamping, whereas the synchronizing link member of the present invention functions as a compression member during clamping. The other operations are also the same as those in claim 1, and therefore the description thereof will be omitted.

[0012]

As described in the above section, the following effects can be obtained. According to the clamp device of the first aspect, by providing the clamp body, the guide portion, the sliding member, the upper pressing member, the pair of left and right clamp claw members, the pair of left and right synchronizing link members, and the driving means, The upper part of the long pillar material can be clamped by the upper pressing member and the lower parts of both sides of the long pillar material can be clamped by the pair of left and right lower pressing parts respectively, and the three positions of the outer circumference of the long pillar material can be firmly divided into approximately three equal parts. The upper holding member and the pair of left and right lower holding portions are configured to approach and separate from each other.
It can be reliably clamped even the state long columnar member having a diameter larger length pillar of small diameter, a pair of the clamp claw member and the clamp body
Prevent interference, increase the length of the synchronization link, and open the connection.
Amplification function that amplifies the amount of movement in the closing direction at the position of the lower presser
Since it is made large, the variable width of the diameter of the long pillar material to be clamped can be made sufficiently large, the clamp body, the sliding member, the upper pressing member, the pair of left and right clamp claw members,
Since there are few parts such as a pair of left and right synchronization link members,
Effects such that the structure of the clamp device can be remarkably simplified and downsized, the drive means can be of a simple structure that only vertically moves the sliding member, and the control system thereof can be simple. Is obtained.

According to the clamp device of the second aspect, the same effect as that of the first aspect can be obtained.

[0014]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic overall perspective view of an oil rig installed on a work table for offshore oilfield drilling. A pipe rack 2 (pipe storage) is arranged in front of a drilling tower 1, and a pipe 3 is installed in the pipe rack 2. (Casing pipes, riser pipes, etc.) are sorted by type and diameter and stocked, and the pipes 3 are supplied from the pipe rack 2 to the pipe hangers 5 of the drilling tower 1 by the pipe transfer device 4. The pipe transfer device 4 is a self-propelled pipe transfer device configured to reciprocate on two rails 6 laid along the pipe rack 2 between the pipe rack 2 and the drilling tower 1. The pipe transporting device 4 has a carriage 7 traveling on a rail 6, a swing base 8 mounted on the carriage 7 so as to be horizontally swingable, and swing driven by a swing drive means, and a lower end of the swing carriage 8 is hinged. A multi-joint arm 10 that is coupled and swingably driven up and down by a hydraulic cylinder 9 serving as a swing driving means, and two sets of pipe clamp devices 20 provided on the arm on the distal end side of the multi-joint arm 10 are provided. There is.

The multi-joint arm 10 comprises a first arm member 11, a second arm member 12 and a third arm member 13, the lower end of the first arm member 11 being the upper part of the swivel base 1.
A pair of brackets is hinged to each other by a horizontal spindle, and is configured to be rockably driven by a hydraulic cylinder 9 mounted on the front part of the swivel base 8 and the middle part of the first arm member 11. There is. The lower end of the second arm member 12 is hinged to the upper end of the first arm member 11 by a support shaft 12a parallel to the support shaft, and the tip (upper end) of the second arm member 12 is connected.
The base end (lower end) of the third arm member 13 is attached to the spindle 12.
The first arm is a hydraulic cylinder 18 which is hinged by a support shaft parallel to a and is bridged over the upper portion of the first arm member 11 and the tip end side portion of the second arm member 12 on the front surface side of the arm 10. The member 11 and the second arm member 12 are driven to bend and extend relatively, and the distal end portion of the second arm member 12 and the third arm member 13 on the rear surface side of the arm 10.
The second arm member 12 and the third arm member 13 are relatively flexed and oscillated by a hydraulic cylinder 19 that is mounted over the base end side portion thereof. With the above structure, the articulated arm 10 is flexibly driven by the hydraulic cylinders 9, 18, and 19 in the vertical plane, and the inclination of the third arm member 13 and the distance from the swivel base 8 are freely adjusted.

Next, the pipe clamp device 20 attached to the tip end side portion of the third arm member 13 and the middle portion in the length direction will be described. However, since both pipe clamp devices 20 have the same configuration, the third arm member 1
The pipe clamp device 20 attached to the distal end side portion of 3 will be described on the assumption that the third arm member 13 is held in the horizontal posture. As shown in FIGS. 2 to 4, a square hole 21 is formed in a vertically penetrating manner at a central portion in the width direction of a third arm member 13 (hereinafter referred to as a clamp body) corresponding to the clamp body. Guide grooves 22a are provided at four corners of 21.
The guide member 22 formed with the
2 is attached to the inner surface of the square hole 21 and attached at the lower end 2
It is fixed to the clamp body 13 via 2b, and the pair of left and right guide grooves 22a face each other. The sliding member 23 includes a pair of front and rear plate members 24 and a pair of left and right connecting plates 25 connecting the plate members 24 to each other.
The guided portions 26 at the four corners of the sliding member 23 are engaged with the corresponding guide grooves 22a so as to be vertically slidable.

The upper end of the cylinder body of the double-acting hydraulic cylinder 27 vertically arranged at the center of the sliding member 23 is pin-connected to the clamp body 13 by a horizontal support shaft 28 oriented in the front-rear direction. The lower end portion of the rod 27 a of 27 is connected to the lower end portion of the sliding member 23 by a horizontal support shaft 29 facing forward and backward. In addition, the pair of oil chambers of the hydraulic cylinder 27 is connected to the pipe transfer device 4
Is connected to a hydraulic pressure supply device provided in the machine room via a hydraulic hose, and is operated from the operation panel on the cockpit of the pipe transport device 4. Upper pressing member 30 for pressing the upper end of the pipe 3
Is a connecting portion 31 and an upper holding portion 32 fixed to the lower end thereof.
The connecting portion 31 is fixedly connected to the lower end portion of the rod 27a, the support shaft 29 is inserted through the connecting portion 31, and the curved lower surface of the upper pressing portion 32 has a pad 33 made of, for example, hard rubber. Is provided.

Therefore, the sliding member 23 is vertically moved up and down by the hydraulic cylinder 27 so that the sliding member 23 is clamped as shown in FIG.
It is possible to drive up and down over a position where it projects largely below the lower surface of the plate and a position where it recedes upward as shown in FIG.
The pair of left and right clamp claw members 34 are for pressing the lower portions of both left and right side portions of the pipe 3, and the clamp claw members 3 are provided.
Reference numeral 4 denotes a pair of clamp claw main bodies 35 which are spaced apart from each other in the front-rear direction, and a spacer 36 for connecting the bent portions of both clamp claw main bodies 35.
A connecting shaft 37 that is connected via a
Of the support shaft 38 that connects the upper end of the clamp body 13 to the bracket 13A of the clamp body 13 and a gently curved lower pressing member 39 fixed to the lower ends of the clamp claw main bodies 35. The lower pressing members 39 face each other. A pad made of hard rubber, for example, is provided on the lower pressing portion 40 on the inner side.

The upper end of the left clamp claw member 34 is located at the lower end of the left side of the clamp body 13 and is a pair of front and rear brackets 1.
3A is rotatably connected by a support shaft 38, and the upper end of the right clamp claw member 34 is connected by a support shaft 38 to a pair of front and rear brackets 13A at the lower end of the right side of the clamp body 13. The left and right clamp claw members 34 are
It is symmetrical to the left and right, and has a shape that is substantially "F" -shaped when viewed from the front, and its lower end portion is formed in a gentle curved shape toward the center side. Connected with the connecting shaft 37 of each clamp claw member 34.
The connecting portion to be connected is located in the middle of the upper half of the clamp claw member 34.
Is formed, and the connecting portion is connected to the upper end portion of the clamp claw member 34.
The upper pressing member 30 and the upper pressing member 30 are connected to the line connecting the lower pressing member 39.
It projects a certain distance to the opposite side. Incidentally, the bracket 13A
Is a member corresponding to a part of the clamp body 13. Further, the sliding member 23 and the left and right clamp claw members 34 are provided so that the clamp body 13 can be reliably gripped in a substantially constant position from the small diameter pipe 3 to the large diameter pipe 3. As described below, they are interlockingly connected via a pair of left and right synchronizing link members 44. The left-side synchronization link member 44 includes a pair of front and rear clamp claw bodies 3 on the left side.
5 is composed of a pair of front and rear link plate members 44a arranged close to each other, and the right end portions (inner end portions) of both link plate members 44a are rotatably connected to the support shaft 29, The left end (outer end) of both link plate members 44a is rotatably connected to the connecting shaft 37 of the bent portion of the corresponding clamp claw main body 35 on the left side. The right-side synchronization link member 44, like the left-side link member 44, includes a pair of front and rear clamp claw bodies 35 on the right side.
The front and rear sides of the link plate member 44a are arranged close to each other, and the left end portions (inner end portions) of both link plate members 44a are rotatably connected to the support shaft 29. The right end (outer end) of both link plate members 44a is rotatably connected to the connecting shaft 37 of the bent portion of the corresponding clamp claw main body 35 on the right side.

The dimensions and shapes of the left and right clamp claw members 34, the dimensions of the left and right synchronizing link members 44, etc. are set appropriately, and when the sliding member 23 descends, it is synchronized with the descending of the sliding member 23. The left and right clamp claw members 34 swing in the closing direction, the upper pressing part 32 and the left and right lower pressing parts 40 approach the center of the pipe 3 to be clamped, and the sliding member 23 moves. When ascending, the left and right clamp claw members 34 swing in the opening direction in synchronization with the ascending of the sliding member 23, and the upper holding portion 32 and the left and right lower holding portions 4
0 and 0 are arranged so as to be separated from the center of the pipe 3 at a substantially equal distance in a direction away from the center of the pipe 3. As shown in FIG. 5, when the small-diameter pipe 3 is gripped, the left and right lower pressing portions 40 can intersect with each other. Therefore, the left lower pressing portion 40 and the right lower pressing portion 40 are not symmetrical. As shown in FIG. 4 and FIG. 12, a cutout 4 is formed at the center of the lower end of the lower pressing portion 40 on the left side.
1 is formed, and a cutout portion 45 is formed in the front end portion and the rear end portion of the lower pressing portion 40 on the right side.

The operation of the pipe clamp device 20 described above will be described. When the pipe 3 is gripped by the pair of pipe clamp devices 20 in order to transport the pipe 3 by the pipe transport device 4 or when the grip is released, the pipe clamp device 20 is operated as follows. First, when gripping the pipe 3, the sliding member 23 is held at, for example, the upper limit position via the hydraulic cylinder 27, the clamp body 13 of the pipe clamp device 20 is positioned above the pipe 3, and the upper pressing portion 32 is fixed. When hydraulic pressure is supplied to the upper oil chamber of the hydraulic cylinder 27 to move the sliding member 23 downward while the pipe 3 is approached, the left and right clamp claw members 34 swing in the closing direction in synchronization with this. However, since the upper pressing portion 32 and the left and right lower pressing portions 40 approach the center of the pipe 3 at substantially equal distances,
As shown in FIG. 2, the upper portion of the pipe 3 and the lower portions of the left and right side portions can be gripped at the outer circumference of the pipe 3 at substantially equal positions.

The state in which the pipe 3 is gripped in this way is as shown in FIGS. 5 to 8 according to the diameter of the pipe 3, and it can be reliably gripped from the small diameter pipe 3 to the large diameter pipe 3. Further, since it is possible to hold the pipe 3 so that the center of the pipe 3 is at a fixed position with respect to the clamp body 13 regardless of the diameter of the pipe 3, the grip of the pipe 3 is also released when the pipe 3 is held. Sometimes convenient. Next, when the grip of the pipe 3 is released after the pipe 3 is conveyed, when hydraulic pressure is supplied to the lower oil chamber of the hydraulic cylinder 27 to raise the sliding member 23, the left and right parts are synchronized with this. The clamp claw member 34 swings in the opening direction, and the upper pressing portion 32 and the left and right lower pressing portions 40 are separated from the center of the pipe 3 by a substantially equal distance in the direction away from each other, so that the pipe 3 can be released from the clamp. .

In the pipe clamp device 20,
A pair of left and right clamp claw members 34 are interlockingly connected to a sliding member 23, which is driven up and down by a single hydraulic cylinder 27, via a pair of left and right synchronizing link members 44, and the upper portion is synchronized with the vertical movement of the sliding member 23. Since the pressing portion 32 and the left and right lower pressing portions 40 are configured so as to approach and separate from each other at substantially equal distances, the pipe 3 can be reliably gripped at the outer peripheral approximately three-divided position, and the pipe 3 that can be clamped. The variable width of the bore can be made large, the number of members is small, the configuration is simple and the size and weight can be reduced, the hydraulic supply system and control system of the hydraulic cylinder 27 can be simplified, and as a result, the manufacturing cost of the pipe clamp device 20 can be reduced. It is possible to obtain significant effects such as significant reduction.

Another Embodiment: See FIGS. 9 to 16 Next, a pipe clamp device 20A according to another embodiment will be described. Assuming a state in which the same clamp body 13 is held in a horizontal posture as described above, as shown in FIGS. 9 to 12, a vertical circular hole 51 is penetratingly formed in the lateral center portion of the clamp body 13. This circular hole 5 is formed in
1 is provided with a hydraulic cylinder 52, and the hydraulic cylinder 52
The upper end of the cylinder body is connected to a pair of front and rear brackets 53 fixed to the upper end of the clamp body 13 via a support shaft 54. The left and right sides of the circular hole 51 are connected to the left and right side portions of the clamp body 13. A pair of front and rear vertical guide members 55 are fixed to each other, and a wide and shallow guide groove 56 is formed in the vertical direction between the front and rear guide members 55 and the side surface of the clamp body 13. The sliding member 57 mounted in the left and right guide grooves 56 so as to be movable up and down is an inverted gate type in a front view, and the sliding member 57 is the left member 5.
8 and the right side member 59, and a connecting member 60 that fixedly connects the lower end portions thereof, the left side member 58 and the right side member 59 are respectively a plate member 61 fitted in the guide groove 56 and the front and rear portions 1 fixed to the plate member 61. The connecting member 60 is composed of a pair of reinforcing plates 62.
Is composed of a pair of front and rear plate members, and the lower end of the rod 52a of the hydraulic cylinder 52 is provided at the center of the connecting member 60 with the support shaft 6
3, the hydraulic cylinder 52 drives the sliding member 57 up and down to move the sliding member 57.
13 is configured to be able to move up and down over a position where it projects downward from the lower end of the clamp body 13 as shown in FIG. 13 and a position where it retreats upward as shown in FIG.

Further, a curved upper pressing member 64 is fixed to the lower end of the central portion of the connecting member 60 of the sliding member 57, and the upper pressing member 64 is provided with a pad made of, for example, hard rubber. Is provided. The pair of left and right clamp claw members 68 are for pressing the lower portions of both side portions of the pipe 3, and the left side clamp claw member 68 is a pair of front and rear clamp claw main bodies 69 and both clamp claw main bodies 69.
And a curved lower holding member 72 fixed to the right side surfaces of the lower ends of the clamp claw main bodies 69. Similarly, the right side clamp claw member 68 includes a pair of front and rear clamp claw main bodies 69, a support shaft 70 that connects both clamp claw main bodies 69 and is pivotally supported by a pivot support bracket 71 of the clamp body 13, and both clamp claws. It is composed of a curved lower pressing member 72 fixed to the left side surface of the lower end of the main body 69. The left and right lower pressing members 72 are provided with a lower pressing portion 73 provided with a pad made of hard rubber, for example.

A pair of front and rear pivot brackets 71 for pivotally supporting the left clamp claw member 68 are fixed to the lower end of the clamp main body 13 at positions on the front and rear sides of the left member 58 of the sliding member 57. Of the clamp claw member 68 on the left side, the upper part of the middle part of the clamp claw member 68 is attached to the lower end of the pivot support bracket 71.
It is pivotally supported by 0. Similarly, a pair of front and rear pivot brackets 71 for pivotally supporting the right clamp claw member 68 are fixed to the lower end of the clamp body 13 at positions on the front and rear sides of the right member 59 of the sliding member 57 and clamped. The upper part of the middle step portion of the right clamp claw member 68, which projects rightward from the right end surface of the main body 13, is rotatably supported by the support shaft 70 on the lower ends of the pivot support brackets 71. The left and right pivot brackets 71 are integrally formed at their upper ends, and the pivot brackets 71 are members corresponding to a part of the clamp body 13.

A pair of left and right synchronizing link members 74 for interlockingly connecting the left and right clamp claw members 68 to the sliding member 57 are provided.
Each of which is composed of a pair of front and rear link plate members 75, and the upper end of the left synchronizing link member 74 is rotatably connected to the upper end of the reinforcing plate 62 of the left member 58 by a connecting shaft 76. The lower end is rotatably connected to the upper end of the left clamp claw member 68 by a connecting shaft 77. Similarly, the upper end of the right synchronizing link member 74 is rotatably connected to the upper end of the reinforcing plate 62 of the right member 59 by the connecting shaft 76, and the lower end thereof is the right clamp claw member 68. Is rotatably connected to the upper end of the shaft by a connecting shaft 77. The left and right clamp claw members 68 are symmetrical to each other in the left-right direction, and are formed in a substantially "V" shape in a front view, and the lower end portions thereof are formed in a gently curved shape toward the center side. Each class
Of the synchronization link member 7 with the connecting shaft 77 of the pump claw member 68.
The connecting part connected to 4 is a pin connecting which is connected by the support shaft 70.
Upper presser member 6 than the line connecting the joint and the lower presser member 72
It protrudes to the opposite side from 4 by a predetermined distance. The dimensions and shapes of the left and right clamp claw members 68, the dimensions of the left and right synchronizing link members 74, and the like are set appropriately, and when the sliding member 57 descends, it is synchronized with the descending of the sliding member 57. Left and right clamp claw members 68
Oscillates in the closing direction, the upper pressing portion 65 and the left and right lower pressing portions 73 relatively approach each other at substantially equal distances toward the center of the pipe 3 to be clamped, and when the sliding member 57 rises, the sliding member In synchronization with the rise of 57, the left and right clamp claw members 68 swing in the opening direction,
The upper pressing portion 65 and the left and right lower pressing portions 73 are configured so as to be separated from the center of the pipe 3 by a substantially equal distance in a direction away from the center of the pipe 3. As shown in FIG. 13, when the small-diameter pipe 3 is gripped, the left and right lower pressing portions 73 can intersect with each other. Therefore, the left lower pressing portion 73 and the right lower pressing portion 73 are not symmetrical. As shown in FIGS. 11 and 12, a cutout portion 78 is formed in the central portion of the lower end portion of the right lower pressing portion 73, and a cutout portion 79 is formed at the front end portion and the rear end portion of the left lower pressing portion 73. Are formed.

The operation of the pipe clamp device 20A described above will be described. A pair of pipe clamp devices 20A for transporting the pipe 3 by the pipe transport device 4
When gripping the pipe 3 or releasing the grip,
The pipe clamp device 20A is operated as follows. First, when gripping the pipe 3, the sliding member 57 is held at the upper limit position via the hydraulic cylinder 52 as shown in FIG. 16, and the clamp body 13 of the pipe clamp device 20A is positioned above the pipe 3. When the upper pressing portion 65 is brought close to above the pipe 3, hydraulic pressure is supplied to the upper oil chamber of the hydraulic cylinder 52 to lower the sliding member 57, and the left and right clamp claw members are synchronized with this. 68 swings in the closing direction, and the upper holding portion 65 and the left and right lower holding portions 73 approach the center of the pipe 3 at substantially equal distances, so that as shown in FIG. The outer circumference of the pipe 3 is approximately 3
It can be gripped at equal positions. The state in which the pipe 3 is gripped in this manner is shown in FIG.
As shown in FIG. 15, the small diameter pipe 3 can be reliably gripped over the large diameter pipe 3, and the center of the pipe 3 is at a fixed position with respect to the clamp body 13 regardless of the diameter of the pipe 3. Since it can be gripped as described above, it is convenient both when gripping the pipe 3 and when releasing the grip of the pipe 3.

Next, when the grip of the pipe 3 is released after the pipe 3 is conveyed, the hydraulic pressure is supplied to the lower oil chamber of the hydraulic cylinder 52 to raise the sliding member 57, and in synchronization with this. And the left and right clamp claw members 68 swing in the opening direction, and the upper holding portion 65 and the left and right lower holding portions 73 are separated from the center of the pipe 3 by a substantially equal distance, so that the pipe 3 is released. be able to. According to the pipe clamp device 20A described above, the same effect as that of the clamp device 20 of the above-described embodiment can be obtained.
The description is omitted. The pipe clamp device 2 of the present application
0 and 20A are various pipes other than pipes used in oil rigs, various hollow cylindrical long column materials other than pipes, various solid steel materials and woods, various hollow or solid non-shaped materials. Of course, the present invention can also be applied to a clamp such as a long pillar material having a circular cross section.

[Brief description of drawings]

FIG. 1 is an overall schematic perspective view of an oil rig including a pipe transport device.

FIG. 2 is a vertical sectional front view of the pipe clamp device according to the embodiment.

FIG. 3 is a plan view of the pipe clamp device.

FIG. 4 is a vertical sectional side view of the pipe clamp device.

FIG. 5 is an operation explanatory view of the pipe clamp device.

FIG. 6 is an operation explanatory view of the pipe clamp device.

FIG. 7 is an operation explanatory view of the pipe clamp device.

FIG. 8 is an operation explanatory view of the pipe clamp device.

FIG. 9 is a vertical sectional front view of a pipe clamp device according to another embodiment.

FIG. 10 is a plan view of the pipe clamp device.

FIG. 11 is a side view of the pipe clamp device.

FIG. 12 is a side view of the lower end portion of the left clamp claw member.

FIG. 13 is an operation explanatory view of the pipe clamp device.

FIG. 14 is an operation explanatory view of the pipe clamp device.

FIG. 15 is an operation explanatory view of the pipe clamp device.

FIG. 16 is an operation explanatory view of the pipe clamp device.

FIG. 17 is an overall perspective view of a conventional oil drilling rig.

FIG. 18 is a front view of a bridge crane according to the related art.

FIG. 19 is a front view of a conventional bridge crane.

[Explanation of symbols]

 13 Clamp Main Body (Third Arm Member) 20, 20A Pipe Clamp Device 23, 57 Sliding Member 27, 52 Hydraulic Cylinder 30, 64 Upper Pressing Member 32, 65 Upper Pressing Part 34, 68 Clamping Claw Member 40, 73 Lower Pressing Part 44 , 74 Link members for synchronization

Claims (2)

[Scope of utility model registration request] 1. A clamp device for gripping a long pillar material for gripping and transferring solid or hollow long pillar materials having various diameters, wherein a vertically-oriented guide portion is formed in a central portion of a clamp body. , A sliding member is provided in this guide portion so as to be able to move up and down between a position protruding downward from the guide portion by a predetermined length and a position retracted upward, and a sliding member for pressing the upper portion of the long pillar member on the lower end portion of the sliding member. the upper pressing member disposed, left side of the clamp body
The pair of left and right clamp claw member for opening and closing is pinned to the left and right in each upper end at the bottom and the right-side lower portion is provided, the lower presser for pressing the lower part of both sides of the long pillar at the bottom of the clamping claw member Part is provided, and the upper end part is provided at an intermediate part of the upper half part of the pair of left and right clamp claw members.
To the side opposite to the upper presser member than the line connecting the lower presser and
A pair of left and right synchronizing link members for connecting the connecting portions of the pair of left and right clamp claw members to the lower end portion of the sliding member, respectively, for downward movement and upward movement of the sliding member. Accordingly, a pair of left and right synchronizing link members for synchronously operating the upper pressing member and the pair of clamp claw members are provided so that the upper pressing member and the pair of left and right lower pressing portions approach and separate from each other. And a driving device for vertically moving the sliding member. 2. A clamp device for gripping a long pillar material for gripping and transferring solid or hollow long pillar materials having various diameters, wherein vertical guide portions are formed on both left and right sides of a clamp body. However, these guide parts are provided with a sliding member of an inverted gate in front view so that it can be lifted and lowered between a position projecting downward by a predetermined length from the guide part and a position retracting upward, and it is long at the center of the lower end of the sliding member. the upper pressing member for pressing the top of the column member is provided, the right and left pair of clamp jaws members are pin-connected at the top of each vertical middle portion to open and close the left and right to the left side lower part and the right-side lower portion of the clamp body Provided below the clamp claw members are lower pressing portions for pressing the lower parts of both side portions of the long pillar material. The upper and lower ends of the pair of left and right clamp claw members are provided with a pin connecting portion and a lower portion.
Given by the line connecting the part holding unit and the remote upper pressing member to the other side
Distance connecting portion respectively provided protruding, a synchronous link member pair of left and right respectively connected to an upper end portion of the right and left sliding members connecting portions of the left and right pair of clamp jaws members, downward movement, the upper sliding member The clamp main body is provided with a pair of left and right synchronizing link members that synchronously actuate the upper pressing member and the pair of clamp claw members so that the upper pressing member and the pair of left and right lower pressing portions approach and separate according to the movement. The clamp device is provided with a drive means for vertically moving the sliding member.