JPH1072183A - Suspending gripping device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suspend a block or the like, and directly transport/install it to/in an installing position by interlocking an opening/closing regulating mechanism in synchronism with extensible/contractible operation of an extensible/ contractible actuating body, and alternately gripping and releasing a heavy cargo by alternately regulating opening/closing operation of left and right swinging bodies. SOLUTION: An opening adjusting part 47 is arranged in the tip vicinity of a left swinging body 42, and an opening/closing regulating mechanism 44 is arranged in a tip upper part of a right swinging body 43. When these opening/ closing regulating mechanism 44 and opening adjusting part 47 are operated in cooperation with each other, the left swinging body 42 and the right swinging body 43 can fix or release an opening angle (an angle at which the left swinging body 42 and the right swinging body 43 are raised upward like wings are spread) in opening/closing operation with a through pin 45 as the center. The opening/ closing regulating mechanism 44 can perform switching operation to engage with or release from the opening adjusting part 47 by interlocking with an extensible/contractible actuating body of an extensible/contractible actuating body 41.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an attaching / detaching apparatus which is suspended by a hanging hook of a crane or the like and automatically performs an operation of clamping a concrete block or the like and an operation of releasing the clamping by a lifting operation.

[0002]

2. Description of the Related Art Conventionally, when lifting a block or the like, the holding arm is opened when the lifted block or the like is lowered to a predetermined position, and when the block is lifted, the holding arm is automatically opened and held. The mizo cam mechanism that is very commonly used in push-type switches, so that when the holding arm is lowered again to the block etc., the open holding of the holding arm is released, and when it is lifted again, the holding arm is held up while holding the block etc. Gives a stop position to the reciprocating linear motion
An apparatus for automatically opening and closing a pantograph holding arm by a method of generating a sliding amount in stages is used.
A structure in which the mizo cam mechanism is improved to a rotary gate type cam as in -191786 has been proposed.

[0003]

In the structure of the prior art, the opening / closing amount of the holding arm is determined by the arm-to-leg ratio of the pantograph and the cam shape. The amount is not constant.

[0004] Therefore, in the case of installation and the like, since the total of the insertion width of the holding piece and the moving amount of the holding arm for holding the opening is equal to or more than the predetermined amount of the mortar joint gap, the use is limited to rough lifting and carrying work. After the temporary placement of the blocks and the like, an operation of moving to the installation position by manual work or the like is required.

[0005] Further, the size of the apparatus is increased due to the pantograph, and the cost cannot be denied.

Accordingly, an object of the present invention is to provide an inexpensive lifting and holding apparatus which can lift a block or the like, directly transport it to an installation position, and install it.

[0007]

According to the present invention, in order to achieve the above object, a cam (3) is provided on the inner surface of an outer cylinder (2) vertically suspended below a hanging rod (1), and A hook (7) engaging with the cam (3) is supported on the inner cylinder (4), and the outer cylinder (2)
A cam sliding body provided as a sliding opposite corner by engaging with a connecting rod (5) and a long hole (6) provided in parallel with an inner cylinder (4);
A pair of left and right holding arms (8) are supported at the lower end of the inner cylinder (4), and a holding arm closing angle adjustment unit (16) is provided on the holding arm (8), and a screw is provided in the longitudinal direction of the holding arm (8). Feeder (1
A guide (10) that slides so as to be positionable in 1) is provided on the holding arm (8), and a holding body having a holding piece (9) opposed to a lower portion of the guide (10); An inclined slide guide (12) is provided on the outer surface, and a bearing portion (14) slidable in a direction orthogonal to the longitudinal direction of one of the holding arms (8) is provided near one of the holding arms (8). And a driven member (13) that is disposed and engaged with the bearing portion (14) and the inclined slide guide (12), and a holding arm opening angle adjusting portion (17) provided on the holding arm (8). ), The bearing-side sliding locking portion (15) of the driven member (13) is locked in conjunction with the sliding movement of the outer cylinder (2), and the locking is released. It is provided and configured in such a manner.

According to the present invention, the telescopic operating body comprises a vertically extending telescopic operating body, one swinging body slightly oriented in the horizontal direction, and the other swinging body oriented slightly in the horizontal direction. The lower end of the body, the tip of one oscillator, and the tip of the other oscillator are combined to form an inverted T-shape by connecting the three members rotatably from the side with a rotation axis. A contact claw is provided on each lower surface of the moving body, each contact claw is brought into close contact with the left and right side surfaces of the heavy object, and the left and right rocking bodies connected to the lower end thereof are lifted up by raising and lowering the telescopic operating body to form contact claw on both sides. The lifting and contracting device is capable of being pressed against the left and right side surfaces of the heavy object to pinch and lift the heavy object. Time and position when reduced And an opening / closing regulating mechanism provided on any one of the rocking bodies to restrict the left and right rocking bodies from rotating downward about the rotation axis. The open / close regulating mechanism is interlocked in synchronism with the expansion / contraction operation of the swinging body, and alternately regulates the opening / closing operation of the right and left rocking bodies, thereby alternately holding and releasing a heavy object. It is.

According to the present invention, the telescopic operating body comprises a vertically extending telescopic operating body, one swinging body slightly oriented in a horizontal direction, and the other swinging body oriented slightly in a horizontal direction. The lower end of the body, the tip of one oscillator, and the tip of the other oscillator are combined to form an inverted T-shape by connecting the three members rotatably from the side with a rotation axis. A contact claw is provided on each lower surface of the moving body, the respective contact claws are brought into close contact with the left and right side surfaces of the heavy object, and the left and right rocking bodies connected to the lower ends thereof are lifted up by extending and retracting the telescopic operating body, thereby forming the contact claws on both sides. The lifting and contracting device is capable of pressing and lifting the heavy object by pressing against the left and right side surfaces of the heavy object. Connect the tips of a pair of oscillators with a shaft, and The lower elastic body is slidably combined in the length direction, and a sliding guide body having a cam surface is fixed to the upper elastic body, and the lower elastic body is formed along the cam surface of the sliding guide body. And a position stop mechanism is formed by the sliding guide body and the contact moving body, and the left and right oscillating bodies are rotated downward about the rotation axis in any of the oscillating bodies. An opening / closing control mechanism is provided to control the expansion and contraction of the upper telescopic body and the lower telescopic body, and the position of the telescopic operating body is set to either the shortest or the longest by the position stop mechanism. The opening / closing control mechanism is interlocked in synchronization with the expansion / contraction operation of the telescopic operating body, and alternately regulates the opening / closing operation of the left and right rocking bodies, thereby alternately holding and releasing heavy objects. An object of the present invention is to provide a lifting and holding apparatus that can perform the operation.

According to the present invention, the telescopic operating body comprises a vertically extending telescopic operating body, one rocking body slightly oriented in a horizontal direction, and the other swinging body oriented slightly in a horizontal direction. The lower end of the body, the tip of one oscillator, and the tip of the other oscillator are combined to form an inverted T-shape by connecting the three members rotatably from the side with a rotation axis. A contact claw is provided on each lower surface of the moving body, each contact claw is brought into close contact with the left and right side surfaces of the heavy object, and the left and right rocking bodies connected to the lower end thereof are lifted up by raising and lowering the telescopic operating body to form contact claw on both sides. The lifting and contracting device is capable of being pressed against the left and right side surfaces of the heavy object to pinch and lift the heavy object. Time and position when reduced A horizontal slide that slides in a direction perpendicular to the length direction of the rocker in accordance with the operation of the telescopic actuator is provided on one rocker, and the horizontal slide is contacted depending on the position of the horizontal slide. , An opening adjustment portion for regulating rotation about the rotation axis is provided on the other rocking body, and the horizontal slide body is moved in a direction perpendicular to the length direction of the rocking body in synchronization with the expansion and contraction operation of the expansion and contraction operation body When the opening adjustment section comes into contact with the moved horizontal slide body, the left and right rockers are prevented from rotating downward about the rotation axis, and the opening and closing operation of the rocker is alternately controlled. The present invention is to provide a lifting and holding device capable of alternately holding and releasing a heavy object.

According to the present invention, the telescopic operating member comprises a vertically extending telescopic operating member, one rocking member slightly oriented in the horizontal direction, and the other rocking member oriented slightly in the horizontal direction. The lower end of the body, the tip of one oscillator and the tip of the other oscillator are combined to form an inverted T-shape by connecting the three members so as to be rotatable from the side by a rotation axis. A contact claw is provided on each lower surface of the moving body, the respective contact claws are brought into close contact with the left and right side surfaces of the heavy object, and the left and right rocking bodies connected to the lower ends thereof are lifted up by extending and retracting the telescopic operating body, thereby forming contact mountains on both sides. The lifting and contracting device is capable of pressing and lifting the heavy object by pressing against the left and right side surfaces of the heavy object. Connect the tips of a pair of oscillators with a shaft, and The lower elastic body is slidably combined in the longitudinal direction, and a sliding guide body having a cam surface is fixed to the upper elastic body, and the lower elastic body is arranged along the cam surface of the sliding guide body. The sliding guide body and the contact moving body form a position stop mechanism, which interlocks with the operation of the telescopic operating body and slides in a direction perpendicular to the length direction of the rocking body. A slide body is provided on one rocking body, and an opening adjustment unit that contacts the position of the horizontal slide body and regulates rotation about the rotation axis is provided on the other rocking body, synchronized with the expansion and contraction operation of the expansion and contraction operation body Then, the horizontal slide body is moved in a direction perpendicular to the length direction of the rocking body, and the opening adjustment unit comes into contact with the moved horizontal slide body, so that the left and right rocking bodies are directed downward around the rotation axis. Rotation of the swinging body, and alternately regulate the opening and closing operation of the oscillator. There is provided a lifting clamping device capable of alternately perform clamping original release of more heavy.

In the present invention, the above-mentioned position stop mechanism is composed of a sliding guide and a contact moving body, and the sliding guide has a flat plate shape and has an upper portion on the side surface thereof. The cam part is formed, the middle cam part is formed in the shape of an island in the center of the side slightly, and the lower cam part has the lower circular cam surface and the lower linear cam surface formed downward. The lower circular cam surface and the lower linear cam surface are formed in a continuous sawtooth blade shape, and the junction between the lower circular cam surface and the lower linear cam surface is located almost at the center of the sliding guide and protrudes downward. The middle cam portion has an island shape having a cam surface formed on the outer periphery thereof, and has an upper circular cam surface curved downward on its upper surface,
The lower surface forms a lower linear cam surface inclined toward the lower circular cam surface, and the lowermost position of the upper circular cam surface is closer to the lower linear cam surface than the junction between the lower circular cam surface and the lower linear cam surface. The contact moving body is a swinging claw body whose base is swingably attached to the lower telescopic body, and the upper end of the swinging claw body is bent at a right angle into a hook shape. Have nails,
The guide claw is in contact with the cam surface of the sliding guide body, and the upper claw and lower crest are contracted so that the guide claw comes into contact with the upper arc cam surface, and the upper crest and lower crest are extended. As a result, the guide claw contacts the upper circular cam surface and stops extending any further, and then the upper claw and the lower crest are contracted so that the guide claw contacts the lower linear cam surface and follows the inclination thereof. The guide claw moves below the middle cam portion by the movement of the upper and lower telescopic members by the movement of the upper and lower telescopic members by the movement of the upper and lower telescopic members. The guide claw comes into contact with the lower straight cam surface of the middle cam portion by the operation of reducing the lower elastic member and guides it to the lower circular cam surface, and the cycle of this cam causes the upper elastic member and the lower elastic member to move. In the telescopic movement, temporarily stop the length either long or short It is intended to provide a lifting clamping device according to claim.

In the present invention, the opening / closing restricting mechanism described above is composed of a thrust acting body provided on the upper telescopic body and a horizontal slide body provided on one of the rocking bodies, and the thrust acting body is provided below the upper telescopic body. The upper and lower telescoping body is composed of a pair of inclined rails that are spaced apart from each other in the direction in which the telescopic operation of the upper telescopic body is inclined. An upper telescopic body and a lower telescopic body, each of which comprises a sliding shaft held so as to be slidable in the direction, and an engaging claw fixed to the sliding shaft and having its tip engaged between a pair of inclined rails. Is extended and contracted, the engaging claw meshed between the pair of inclined rails is pushed in a direction perpendicular to the length direction of the rocking body, and the sliding shaft is moved by the engaging claw, so that the other is moved. The sliding shaft can move toward and away from the rocking body, When the sliding shaft does not contact the other oscillator, it does not prevent both oscillators from rotating downward. The present invention provides a lifting and holding device characterized in that:

In the present invention, the above-mentioned telescopic operating body has an inner cylinder whose lower end is connected to the distal ends of the left and right rockers by a rotating shaft.
A connecting pin fixed to the lower portion of the outer cylinder, the outer cylinder sliding in the length direction with respect to the inner cylinder; Is inserted into the elongated hole to connect the inner cylinder and the outer cylinder so that they can be extended and contracted in the longitudinal direction. The upper part of the inner cylinder protrudes upward and has a guide claw whose tip is bent like a hook. A lifting pinching device characterized in that a moving claw body is rotatably supported on a shaft, and a flat cam plate having a cam surface with which a guide claw contacts is fixed to an inner surface of an upper part of an outer cylinder. It is.

In the present invention, the above-mentioned rocking body comprises an elongated arm and a slide inserted so as to be movable in the longitudinal direction of the arm. A long bolt with a thread formed on the outer periphery is provided, and the slide body has an insertion hole through which the long bolt can be inserted, and a contact claw is fixed to the lower surface of the slide body. At the same time as inserting the slide body into the arm body, insert a long bolt into the insertion hole, and fix the slide body to the arm body by sandwiching the left and right sides of the slide body with nuts screwed into the long bolt, and adjust the position of the contact claw It is intended to provide a lifting and holding apparatus characterized in that it can be used.

According to the present invention, the closing adjuster is fixed to one of the above-mentioned rocking members, and the right and left rocking members are rotated by a certain angle or more by the contact of the closing adjusting member with the other rocking member. It is an object of the present invention to provide a lifting and holding device characterized in that it is prevented from rotating downward about an axis.

[0017]

According to the present invention, the holding arm opening angle adjusting section (1) is provided.
7) and the sliding-locking portion (15) on the bearing side are locked, and the lifting and holding device, which is lifted and held with the distance between the holding pieces slightly wider than the holding object, is moved onto the holding object and lowered. Then, the lower center portion of the lifting and holding device and the upper mounting portion of the holding piece (9) abut on the upper surface of the holding object.

Next, when the lifting / holding device is lifted, the outer cylinder (2) slides up with respect to the inner cylinder (4), and moves to the inclined slide guide (12) provided on the outer surface of the outer cylinder (2). The engaged driven member (13) is interlocked, and the engagement between the holding arm opening angle adjusting section (17) and the sliding engagement section (15) on the bearing side is released. When the lifting device is further lifted, the lower central portion of the lifting and holding device is separated from the holding object, and the holding portion of the holding piece (9) presses and holds the holding object.

In this state, the lifting / holding device is moved to the installation position, the holding object is set at a predetermined position, and the lifting / holding device is further lowered, so that the outer cylinder (2) slides on the inner cylinder (4). It falls and moves, and the lower center part of the lifting holding device abuts on the upper surface of the holding object by its own weight, and the holding piece releases the holding object. At the same time, the driven member (13) engaged with the inclined slide guide (12) provided on the outer surface of the outer cylinder (2) works together, and the holding arm opening angle adjusting section (17) and the bearing section side. The sliding locking portion (15) is locked.

Next, when the lifting / holding device is lifted, the lifting / holding device is lifted and held in a state where the distance between the holding pieces is slightly wider than the holding object. Thereafter, he engages in a series of installation work through the same operation as described above.

The sum of the insertion width of the holding piece and the opening amount of the holding arm on one side is determined by the holding arm opening angle adjusting section (17) and the screw feeder (11). Since it can be adjusted to be smaller than about 8 to 10 mm, it can be installed without a temporary placing step.

Further, since the holding arm closing angle adjusting portion (16) is provided so as to suppress the closing of the holding piece too much, the holding piece in the closed state without the holding object is attached to the lifting and holding device, and By lowering it again and raising it again, it is possible to return to a state in which it is slightly wider than the above-mentioned holding object.

[0023]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to the drawings, an embodiment will be described with reference to the accompanying drawings. The connecting rod (5) is engaged with the elongated hole (6) provided in the state through the outer cylinder (2).
And the outer cylinder (2) and the inner cylinder (4) are slid on opposite corners, and a hook (7) engaging with the cam (3) is provided on the upper part of the long hole of the inner cylinder (4). It is a cam sliding body.

The trajectory of the cam and the hook engaging portion follows a substantially heart-shaped path in a fixed direction.
Shown in Although the structure of the cam prime mover can be a rotary gate type, in this embodiment, the groove cam is screwed to the outer cylinder (2). The connecting rod (5) is arranged so as to engage with the lower part of the elongated hole (6) and to be directly connected to the inner cylinder (4) when the outer cylinder (2) is raised in the sandwiched state.

At the lower end of the inner cylinder (4), a pair of left and right holding arms (8) are rotatably supported, and one of the holding arms (8) is provided with a screw-adjustable engaging portion. A clamping arm closing angle adjusting section (16) is provided, which is fixed to the clamping arm and is arranged so as to suppress excessive closing of the clamping arm. This pinching arm (8)
A guide (10) that slides so as to be positionable by a screw feeder (11) is provided in the longitudinal direction of the screw feeder (11). At the lower part of the guide (10), a holding piece (9) composed of an upper mounting portion that comes into contact with the upper surface of the holding object and a holding portion that comes into contact with the side surface is opposed to each other to form a holding body.

An inclined slide guide (12) is provided on the outer surface of the outer cylinder (2). A slidable bearing part (14) is disposed on the driven member (1) engaged with the bearing part (14) and the slide guide (12).
3) is provided.

When the inclined sliding guide (12) is cut into a thin outer cylinder in a groove shape, the holding arm and the driven member (13) are swung with respect to the outer cylinder (2). The member (13) is separately provided on the outer surface of the outer cylinder (2) in order to come off or interfere with the inner cylinder to cause a malfunction. A guide for holding the driven member (13) substantially vertically is attached to the bearing (14), and is engaged with the inclined slide guide (12) so as to be detachable therefrom. As a result, only the cam sliding member can be folded as shown in FIG. 8, and packing and storage are facilitated.

The sliding engagement portion (15) of the driven member (13) on the bearing portion side is substantially above the holding arm opening angle adjusting portion (17) provided on the holding arm (8), and the outer cylinder (2). It is provided so as to be interlocked with the sliding up and down movement and released.

The screw feeder (11) guides a male screw (1) attached to the holding arm in a cantilever manner to slide on the holding arm.
0), it is fastened by female screws, and it is positioned so that it can advance and retreat, and can be adjusted and used for various holding objects having different lengths. In addition, the weight balance determined by the arrangement of parts and the weight balance generated due to manufacturing variations can be adjusted by the screw feeder (11), and the stability of the lifting state can be measured.

By adjusting the holding arm opening angle adjusting section (17) and the screw feeder (11), the lower center of the apparatus body and the holding piece can be moved from the long holding object (FIG. 5) to the short holding object (FIG. Up to 6), it can be set so as to abut the holding object almost simultaneously, so that the holding arm does not move unnecessarily when attaching / detaching to / from the holding object. Therefore, not only the installation of the blocks and the like, but also various lifting and holding in a narrow place can be set as work targets.

Next, the present embodiment will be described in more detail with reference to FIGS.

[Explanation of the whole apparatus]

FIG. 10 shows an embodiment of the lifting and holding device 40 according to the present invention as viewed obliquely from the upper right, and FIG. 11 shows a state opposite to FIG. 10 viewed obliquely from the upper left. It shows. The lifting and holding device 40 is roughly divided into a telescopic operating body 41 and a left rocking body 4 as one rocking body.
2. It is composed of three members, a right rocking body 43 as the other rocking body, and the telescopic operating body 41, the left rocking body 42, and the right rocking body 43 integrally assemble the lifting and holding device 40. Have been. The telescopic body 41 can expand and contract up and down, and its total length can be automatically adjusted with a click-stop function, and its outer shape is an elongated tubular shape. The left oscillating body 42 has a long side wall parallel to each other and has an elongated frame shape opened vertically, and the left oscillating body 42 has a slide body 62 that can move along its length direction. It has been inserted. The right oscillating body 43 has a symmetrical shape with respect to the left oscillating body 42, and has a side wall parallel to each other, and has an elongated frame shape which is opened up and down. The slide body 82 which can move along the direction is inserted. The lower portion of the telescopic operating body 41 and the tip of the left swinging body 42 (FIG. 10)
And the front end of the right rocking body 43 (the left front end in FIG. 10, the right front end in FIG. 11), and the through pin 45 as a rotation shaft is attached to the side surface of the overlapped portion. It is assembled by inserting. Thus, the telescopic operating body 41, the left rocking body 42, and the right rocking body 43 are assembled in an inverted T-shape as shown in FIGS. 10 and 11, and each can rotate around the through pin 45. At the upper end of the telescopic operating body 41, a ring-shaped suspension ring 46 for hooking the entire lifting and holding device 40 on a wire or a chain of a crane is fixed by welding or the like.

Next, as shown in FIG. 10, an opening adjustment portion 47 is provided near the tip of the left rocking member 42, and the right rocking member 4
An opening / closing restricting mechanism 44 is provided at an upper portion of the tip of the device 3. When the opening / closing control mechanism 44 and the opening adjustment unit 47 operate in cooperation with each other, the opening angle (the left swinging body 42 and the right swinging body) is set in the operation of opening and closing the left swinging body 42 and the right swinging body 43 around the through pin 45. The angle at which the moving body 43 is lifted upward as if the blades were spread) can be fixed or released. The opening / closing restricting mechanism 44 can perform an operation of switching between engaging and disengaging with the opening adjustment unit 47 in conjunction with the expansion and contraction operation of the expansion and contraction operation body 41.
Further, as shown in FIG. 11, a close adjusting section 48 is provided near the tip of the left swinging body 42. The distal end of the closing adjustment portion 48 can be brought into contact with or separated from the front surface (the right front edge in FIG. 11) of the distal end of the right rocking body 43, and the left rocking body 42 and the right rocking body 43 open and close around the through pin 45. In this operation, the closing angle (the angle at which the left rocking body 42 and the right rocking body 43 hang down) can be regulated (these operations will be described in detail later).

[Explanation of each part of disassembled device]

FIG. 12 is an exploded view of each of the members constituting the lifting and holding device 40, as viewed from the same line of sight as the state of FIG. 10 described above.

[[Structure of Telescopic Actuator 41]]

The above-mentioned telescopic operating body 41 is composed of members of an outer cylinder 51 as an upper telescopic body and an inner cylinder 52 as a lower telescopic body. A ring-shaped suspension ring 46 is fixedly attached to the plane of the closed upper end. The inner cylinder 52 is in the shape of a square pipe having a hollow rectangular cross section with an opening between the upper and lower sides, and the outer shape is formed smaller than the inner diameter of the outer cylinder 51. It is slidably inserted from the lower end opening. A pin hole 53 is opened in the horizontal direction on the side surface of the lower end of the inner cylinder 52,
In the center of the side surface of the inner cylinder 52, a vertically elongated hole 54 is opened. To assemble the outer cylinder 51 and the inner cylinder 52, a bolt 55 as a connecting pin is inserted from a lower side surface of the outer cylinder 51, and the bolt 55 is inserted into the oblong hole 5 of the inner cylinder 52.
4 so that the inner tube 52 can slide up and down with respect to the outer tube 51 in the length direction thereof. The outer cylinder 51
A sliding action body 106 is provided below the surface of the side surface of which is perpendicular to the surface where the bolt 55 is inserted. The sliding action body 106 is composed of a pair of slender metal pieces, which are inclined rails 109, and each of the inclined rails 109 is arranged in parallel at a predetermined interval. It is arranged so as to be inclined so as to have a gentle angle with the height direction.

[[Configuration of Left Oscillator 42]]

The above-mentioned left rocking body 42 comprises an arm 61 and a slide 62. The arm 61 comprises a rail arm 63, a reinforcing plate 64, a bolt fixing plate 66, a long bolt 67 and the like. .

The rail arm 63 is formed by bending an elongated steel plate so as to have a slightly U-shape. Opposing side walls are arranged so as to be parallel at intervals. A reinforcing plate 64 is fixed at a position close to the opening having a U-shape so as to straddle between the inner walls of both side walls. For this reason, the arm body 61 is
3 and the reinforcing plate 64 are closed in a U-shape, and have an elongated frame shape that is opened vertically. Near the center of the rail arm 63 and between the insides of its side walls,
The bolt fixing plate 66 is fixed so as to protrude upward so as to straddle the inner surfaces of both side walls. This bolt fixing plate 6
Reference numeral 6 denotes a thin steel plate, the upper half of which is exposed from the upper surface of the rail arm 63, and the head of an elongated bolt 67 is fixed to the bolt fixing plate 66. This long bolt 67 has its length direction aligned so as to be parallel to the length direction of the rail arm 63, and its screw portion is
12 toward the rear (in FIG. 12, the back left direction). A nut 68 which can be moved in the length direction of the long bolt 67 by being rotated is screwed into the long bolt 67.

Next, the slide body 62 is inserted into the above-described arm body 61, and can be freely moved in the length direction of the arm body 61. This slide body 62
The main member is a slide frame 74 having a square cross-section and a hollow inside with a hollow shape, and the inner opening shape of this slide frame 74 is set slightly larger than the outer shape of the rail arm 63 described above. The opening of the slide frame 74 can be inserted from the rear end of the rail arm 63 (the rear left side in FIG. 12). This slide frame 74
A contact claw 75 is fixed to the lower end of the slide claw so as to protrude downward at the rear end (the left rear side in FIG. 12). They are arranged at right angles. A positioning plate 76 made of a thin steel plate is fixed vertically on the front side (the right front side in FIG. 12) of the upper surface of the slide frame 74. An insertion hole 77 is opened in the upper part of the positioning plate 76, and a long bolt 67 is inserted into the insertion hole 77 from the tip side thereof.
By screwing the double nut 69 from the tip of the long bolt 67 that has passed through the insertion hole 77, the positioning plate 76 can be tightened with the nut 68 and the double nut 69, and the slide body 62 can be fixed to the arm body 61. The rail arm 6
A pair of pin holes 65 are opened in the side surface of the tip end (the right front side in FIG. 12) of the third arm 3 so that its axis is perpendicular to the length direction of the rail arm 63.

[[Structure of Opening Adjustment Section 47]]

Next, the opening adjusting section 47 is composed of a fixing nut 71 and an adjusting bolt 72. A fixing nut 71 is fixed to the upper and lower edges of one end (right front side in FIG. 12) of the rail arm 63 by welding or the like. The fixing nut 71 has a screw hole formed at the center thereof and has a threaded hole. An adjusting bolt 72 is screwed into the opening of the fixing nut 71 from above, and the height position of the head of the adjusting bolt 72 can be adjusted by the length of the screwing of the adjusting bolt 72. .

[[Configuration of Right Oscillator 43]]

The right oscillating body 43 is formed substantially symmetrically with the left oscillating body 42, and the right oscillating body 43 is composed of an arm body 81 and a slide body 82. The arm body 81 is a rail arm 83. And a reinforcing plate 84, a bolt fixing plate 86, a long bolt 87 and the like.

The rail arm 83 is formed by bending a long and thin steel plate so as to have a slightly U-shape. At a position close to the opening having a U-shape, a reinforcing plate 84 is fixed so as to straddle between the inner walls of both side walls. For this reason, the arm body 81 is
And a reinforcing plate 84, the shape of which is "U" -shaped is closed, and a vertically elongated frame-like structure is provided. Near the center of the rail arm 83 and between the insides of its side walls,
The bolt fixing plate 86 is fixed so as to protrude upward so as to straddle the inner surfaces of both side walls. This bolt fixing plate 8
Numeral 6 is formed of a thin steel plate, the upper half of which is exposed from the upper surface of the rail arm 83, and the head of an elongated bolt 87 is fixed to the bolt fixing plate 86. The long bolt 87 has its length direction aligned so as to be parallel to the length direction of the rail arm 83, and its screw portion is
12 is directed toward the rear (rightward in FIG. 12). A nut 88 which can be moved in the length direction of the long bolt 87 by being rotated is screwed into the long bolt 87.

Next, the slide body 82 is inserted into the above-described arm body 81, and can be freely moved in the length direction of the arm body 81. This slide body 82
The main member is a slide frame 96 having a square cross-section and a hollow inside having a “U” shape. The internal opening shape of the slide frame 96 is set slightly larger than the outer shape of the rail arm 83 described above. The opening of the slide frame 96 can be inserted from the rear end of the rail arm 83 (the right front side in FIG. 12). This slide frame 9
6, a contact claw 97 is fixed to the rear end (right front side in FIG. 12) so as to protrude downward.
The side surface of the contact claw 97 is disposed so as to be perpendicular to the length direction of the slide frame 96. And slide frame 9
A positioning plate 98 made of a thin steel plate is fixed to the front side (the rear left side in FIG. 12) of the upper surface of 6 so as to be vertical. At the top of the positioning plate 98, an insertion hole 99 is opened,
By inserting the long bolt 87 into the insertion hole 99 from the tip end side and screwing the double nut 89 from the end of the long bolt 87 passing through the insertion hole 99, the positioning plate 98 is tightened with the nut 88 and the double nut 89, Slide body 82
Can be fixed to the arm body 81. Note that a pair of pin holes 85 are opened on the side surface of the tip of the rail arm 83 (the left rear side in FIG. 12) so that its axis is perpendicular to the length direction of the rail arm 83.

[[Configuration of Opening / Closing Control Mechanism 44]]

The opening / closing restricting mechanism 44 is composed of the above-mentioned slide action body 106 and the horizontal slide body 105, and can have one function by being engaged with each other. The slide action body 106 is fixed to the outer cylinder 51 as described above, but the horizontal slide body 105 is arranged on the rail arm 83.

A slightly semicircular shaft projection 90 is formed on one upper edge of the above-mentioned rail arm 83 at the tip end (the left side in FIG. 12). A shaft hole 91 is opened. The upper end of the other end of the rail arm 83 (the left rear side in FIG. 12)
On the opposite side, a shaft pipe 9 cut from a round pipe
2 is fixed, and a shaft hole 93 is opened at the center of the shaft pipe 92. The axis of the shaft hole 91 and the axis of the shaft hole 93 are aligned so as to be straight, and both axes are arranged so as to be perpendicular to the length direction of the rail arm 83.

A horizontal slide body 105 is movably inserted into the shaft holes 91 and 93. The horizontal slide body 105 includes an elongated shaft-shaped sliding shaft 107 and an engaging claw 10 fixed to a substantially central side surface of the sliding shaft 107.
8. The engaging claw 108 is formed by bending a round bar at a right angle at the center thereof and has a slightly L-shaped shape. One side of the L-shape is perpendicular to the center of the sliding shaft 107. It is stuck to. This sliding shaft 1
07 is inserted into the shaft hole 91 and the other is inserted into the shaft hole 93, so that the horizontal slide body 105 is movably held in a direction perpendicular to the length direction of the rail arm 83. At this time, the engagement claw 108 fixed to the sliding shaft 107 is located between the shaft projection 90 and the shaft pipe 92, and the engagement claw 108
Can move between the two. In addition, the engaging claw 10
The axis of 8 is perpendicular to the axis of the sliding shaft 107, and the L-shaped bent end of the engaging claw 108 meshes with the space between the pair of inclined rails 109.

[[Configuration of the Closing Adjustment Section 48]]

Next, FIG. 13 illustrates the close adjusting section 48 in detail. FIG. 13 is an exploded perspective view in which the vicinity of the close adjustment section 48 in FIG.

A position adjuster 154 is fixed near the tip of one side surface of the rail arm 63 (on the left front side in FIG. 13).
5 has a through opening. The position adjusting body 154 is fixed so as to protrude on the side surface of the rail arm 63, and is provided with a screw hole 1.
The axis of 55 is parallel to the length direction of the rail arm 63 and is located slightly below the axis of the pin hole 65.
An adjusting bolt 156 can be screwed into the screw hole 155, and the length of the head of the adjusting bolt 156 can be adjusted by the length of the screwing of the adjusting bolt 156. The position adjusting body 154 and the adjusting bolt 156 constitute a closing adjusting section 48.

As described above, the pin hole 65 is opened at the tip of the rail arm 63, and the pin hole 85 is opened at the tip of the other rail arm 83. By inserting the through pin 45 with the center axes of the pin holes 65 and 85 aligned, the rail arm 63 and the rail arm 83 are rotatably connected to each other. At this time, the axis of the screw hole 155 and the axis of the pin hole 65 are vertically spaced apart from each other.
The center axis M of the adjustment bolt 156 screwed into the hole 5 is the pin hole 8
5 is spaced apart from the central axis N of the vertical direction. Since the center axes M and N are vertically separated from each other in this manner, the head of the adjustment bolt 156 comes into contact with the lower part of the distal end edge (right rear side in FIG. 13) of the rail arm 83, and
3 and the rail arm 83 can rotate about the through pin 45, the lower surface of the leading edge of the rail arm 83 contacts the head of the adjustment bolt 156, and the rail arm 63 and the rail arm 8
No. 3 regulates that it will not rotate any more. That is, even if the rail arm 63 and the rail arm 83 are suspended by the telescopic operating body 41, the rail arm 63 and the rail arm 83 have a "C" shape that hangs down slightly, and the closing angle does not become narrower beyond that. The angle at which the rail arm 63 and the rail arm 83 are closed downward can be changed by adjusting the amount by which the adjustment bolt 156 is screwed into the screw hole 155 and moving the position of the head of the adjustment bolt 156.

[Assembly of the lifting and holding device 40]

The telescopic operating member 41, the left rocking member 42, and the right rocking member 43 are thus constituted. To assemble them as an integral lifting and holding device 40, the distal end of the rail arm 63 (see FIG. 12 on the right front side) and the rail arm 83
Are alternately fitted to each other (the left rear side in FIG. 12) so that the positions of the pin holes 65 and 85 match. Thereafter, the lower end of the inner cylinder 52 is fitted into the space between the rail arm 63 and the rail arm 83, and the pin holes 53 are aligned with the positions of the pin holes 65 and 85. Then, through the side of the rail arm 63, the through pin 4
5 can be inserted into the pin holes 53, 65, and 85, and a nut can be screwed into the end of the through pin 45 to connect these three members. These telescopic operating body 41 and left swinging body 4
2. The right oscillating body 43 is combined with a through pin 45, and each can rotate around the through pin 45.

[Structure of Telescopic Actuator 41]

FIG. 14 is an exploded perspective view showing the construction of the telescopic operating body 41 described above in detail and exploding and showing each member.

As described above, the expansion / contraction member 41 is roughly composed of members of the outer cylinder 51 and the inner cylinder 52.
The outer cylinder 51 is in the shape of a square pipe having a closed upper end and a hollow interior, and the internal space has a square cross section. A ring-shaped suspension ring 46 is fixed to the closed upper end surface of the outer cylinder 51 by welding or the like, and the outer cylinder 51 and the inner cylinder 52 can be suspended by a wire or the like by the suspension ring 46. A cam plate 113 as a sliding guide is inserted into the upper part of the inner side surface of the outer cylinder 51 (the surface on the far right side in FIG. 14). A screw hole 114 is opened on each of the upper left and right sides and the lower side of the cam plate 113. The cam plate 113 is inserted into the outer cylinder 5 by screwing the screws 120 into the screw holes 114 respectively.
1 can be fixed. Further, an insertion hole 115 is opened at a lower side of the side surface of the outer cylinder 51 so as to be perpendicular to the longitudinal direction of the outer cylinder 51. 14, a pair of inclined rails 109 are fixed to the lower side surface of the outer cylinder 51, which is at a right angle to the insertion hole 115. This inclined rail 109 is
A pair of elongated metal pieces are arranged so as to be parallel at intervals, and each axis of each inclined rail 109 is inclined with respect to the axis in the longitudinal direction of the outer cylinder 51.

Next, the inner cylinder 52 has the shape of an elongated square pipe having an open top and bottom and a hollow inside.
Is set to be slightly smaller than the internal cross-sectional space of the outer cylinder 51 described above. A pin hole 53 is opened in a lower side surface of the inner cylinder 52, and the axis of the pin hole 53 is disposed so as to be perpendicular to the longitudinal direction of the inner cylinder 52 (in FIG. 53, one is shown, but it is similarly open on the opposite side not shown). At the center of the side surface of the inner cylinder 52 and above the pin hole 53, an elongated hole 54 having a vertically elongated shape is opened (in FIG. 14, only one elongated hole 54 is shown). , On the opposite side not shown). A pin 118 is inserted through and fixed to the upper side surface of the inner cylinder 52, and the pin 118 is positioned so as to be perpendicular to the length direction of the inner cylinder 52. With this pin 118, a support shaft is formed near the upper end opening of the inner cylinder 52,
A rocking claw 117 as a contact moving body is pivotally supported on the pin 118 so as to be able to swing to the left and right while being located inside the upper end opening of the inner cylinder 52.
Has been inserted. The swinging pawl 117 projects upward from the upper end opening of the inner cylinder 52, has an L-shape as a whole, and has a pin 118 which is bent and hooked. It is arranged so that it may become parallel. The coil spring 119 inserted into the pin 118 always presses the swinging pawl body 117 against the inner wall surface of the inner cylinder 52 due to its elasticity. It acts to maintain its angular position so that it does not fall to one side due to its own weight. That is, the swinging pawl body 117 is pressed against the inner wall surface of the inner cylinder 52 by the coil spring 119, and is maintained at the angular position unless any force is applied.

The outer cylinder 51 and the inner cylinder 52 form the telescopic operating body 41.
To assemble, the upper end of the inner cylinder 52 is inserted through the lower opening of the outer cylinder 51, the position of the elongated hole 54 and the insertion hole 115 is adjusted, and the bolt 55 is inserted into the insertion hole 115 from the side surface of the outer cylinder 51. The tip of the bolt 55 is inserted into the insertion hole 115 and the slot 5
After passing through the outer cylinder 51, the outer cylinder 51 projects to the rear surface of the outer cylinder 51, so that the nut 116 can be screwed into the tip of the bolt 55 to connect the outer cylinder 51 and the inner cylinder 52. When assembled in this manner, the bolt 55 is fixed to the outer cylinder 51, but since the bolt 55 is inserted into the elongated hole 54 of the inner cylinder 52, the inner cylinder 52 is It can slide up and down within a range of up and down lengths. When the inner cylinder 52 is inserted into the outer cylinder 51 in this manner, the swing claw 11
The L-shaped bent hook-shaped tip of 7 is brought into contact with the cam surface of the cam plate 113 fixed to the inner surface of the outer cylinder 51.

[Structure of Position Stop Mechanism 130]

The position stop mechanism 130 can temporarily hold the position by the extended or contracted position in the expansion and contraction movement of the outer cylinder 51 and the inner cylinder 52. By this position stop mechanism 130, when the inner cylinder 52 is inserted into the innermost part of the outer cylinder 51, its position is temporarily held, so that the inner cylinder 52 can be prevented from extending even if the inner cylinder 52 is pulled from the outer cylinder 51. And, again, the inner cylinder 52
Is inserted into the outer cylinder 51 to release the engagement.
Can be extended from the outer cylinder 51, and the inner cylinder 5
By expanding and contracting the outer cylinder 2 to the outer cylinder 51, the outer cylinder 51 has a function of alternately maintaining the minimum length of expansion and contraction and the maximum length of expansion. This position stop mechanism 130 is
3 and the swinging pawl body 117. Hereinafter, the position stop mechanism 130 will be described in detail with reference to FIG.

A pair of pin holes 123 are opened on the upper side surface of the inner cylinder 52, and the axis of the pin hole 123 is positioned so as to be perpendicular to the longitudinal direction of the inner cylinder 52. A round bar-shaped pin 118 can be inserted into each of the pin holes 123. Insert this pin 118 into the pin hole 12
3, the pin hole 123 is located at the center of the upper opening of the inner cylinder 52, and is arranged so as to form a “sun” shape. The above-mentioned swinging pawl body 117 has an L-shaped key shape as a whole, and the lower part thereof has a disc-shaped large turning diameter portion 124.
In the center of the large-diameter turning portion 124, the swing shaft hole 1 is provided.
25 has a through opening. The inner diameter of the swing shaft hole 125 is larger than the outer diameter of the pin 118, and
8, the swinging pawl body 117 can freely rotate. A linear swing strut 126 is connected to the upper part of the outer periphery of the large-diameter turning portion 124 so as to extend upward, and the upper end of the swing strut 126 has a guide claw bent at a right angle. 127 are connected. The swinging pawl body 117 and the guide claw 127 form a slightly L-shaped swinging pawl body 117 when viewed from the side. The coil spring 119 has a helical spring-like elastic force, and the pin 118 can be inserted into the center opening of the coil spring 119.

The swinging pawl body 117 and the coil spring 119
In order to assemble into the inner cylinder 52, the axis of the pivot shaft hole 125 is aligned with the axis of the pin hole 123, and one side surface of the large-diameter turning portion 124 is brought into close contact with the inner wall of the inner cylinder 52. Then, the turning diameter large portion 1
24 and the inner wall of the inner cylinder 52 between the coil spring 119
, The pin 118 is inserted linearly into the pin hole 123, the swing shaft hole 125, and the coil spring 119. This pin 118 allows the swinging pawl body 117 and the coil spring 119
Are held by the inner cylinder 52. In this case, the coil spring 119 constantly presses the other side surface of the large-diameter portion 124 by its elastic force, and one side surface of the large-diameter portion 124 is pressed against the inner wall of the inner cylinder 52 by elasticity. Due to this elastic force, a frictional force is generated between the inner wall of the inner cylinder 52 on one side surface of the large-diameter turning portion 124, and the swing pawl body 117 is
Does not roll due to its own weight, and is held at the raised position (the last angular position in which it touches the swinging pawl body 117 and is inclined with respect to the pin 118). It does not change the angular position.

The cam plate 113 is formed by forming a cam surface by cutting a side surface of a thick metal plate (for example, a material such as brass) with a milling machine or the like. On the side surface of the cam plate 113, a cam curve having a special shape is formed, and the guide pawl 127 is made to follow the cam curve according to the cam curve. It is made to oscillate at a constant cycle around the center.

The cam plate 113 has a flat cam substrate 134 serving as a base. The cam substrate 134 is a portion obtained by cutting a thick metal plate by milling or the like. An upper cam portion 135 projects from an upper portion of the side surface of the cam substrate 134, a middle cam portion 136 projects from the center of the side surface of the cam substrate 134, and a lower portion of the side surface of the cam substrate 134. A lower cam portion 137 protrudes from one side (the left front side in FIG. 15). As described above, by cutting the side surface of the metal plate by milling or the like, a flat cam is formed on the side surface of the metal plate, leaving the upper cam portion 135, the middle cam portion 136, and the lower cam portion 137 in an island shape. Substrate 13
4 can be formed. The left and right sides of the upper cam portion 135 and the center of the lower cam portion 137 are opened through screw holes 114, and female screws are formed on the inner periphery of each screw hole 114. Screws 120 can be screwed into the respective screw holes 114, and these screws 120 allow the cam plate 11 to be screwed.
3 is fixed to the inner wall of the outer cylinder 51.

[[Shape of the cam plate 113]]

Next, the cam surfaces formed on the upper cam portion 135, the middle cam portion 136, and the lower cam portion 137 of the cam plate 113 will be described in detail with reference to FIG.

The above-described upper cam portion 135 has a lower surface (FIG. 1).
6, a lower surface is defined as a lower surface), and a lower circular cam surface 141 is formed on the right side and a lower linear cam surface 142 is formed on the left side with respect to the center of the lower surface of the upper cam portion 135 as a boundary. Both are continuous. The cam surface of the lower arc cam surface 141 is in the shape of a letter "", which is inverted, and one of the cam surfaces has a straight surface inclined downward and leftward in FIG. It is curved, and the other has a straight surface that faces vertically downward at the center of the upper cam portion 135.
The lower straight cam surface 142 has a linear lower surface, one of which is located on the upper cam portion 135, and the other is on the upper cam portion 135.
It is located on the left side, and is gently inclined from lower right to upper left. The junction point A at both ends of the lower arc cam surface 141 and the lower linear cam surface 142 is located substantially at the center of the upper cam portion 135, and the vertex of the lower arc cam surface 141 in the semicircular shape is formed. B is located slightly to the right of the center of the upper cam portion 135.

Next, the middle cam portion 136 has a cam surface formed entirely on its outer periphery, and projects in an island shape at the center of the cam substrate 134. The upper portion of the middle cam portion 136 is formed with an upper circular cam surface 143 shaped like a tray that is open upward, and is inclined right and left upward with respect to the bottom C of the upper circular cam surface 143. A straight surface is formed. The left side surface of the middle cam portion 136 in FIG.
44 are formed, and the joining point between the upper arc cam surface 143 and the side linear cam surface 144 is D. This cam part 13
In the lower left portion of FIG. 6, a linear lower linear cam surface 145 inclined toward the lower right direction in FIG. 16 is formed. The junction is E. The length of the lower linear cam surface 145 is a short cam surface, and the lower linear cam surface 146 is provided below the middle cam portion 136 so as to be continuous with the lower end of the lower linear cam surface 145.
Is formed in a straight line inclining toward the upper right. The joining point of the lower linear cam surface 145 and the lower linear cam surface 146 is F
It has become.

The length of the lower straight cam surface 146 is short,
The lower straight cam surface 14 is provided on the lower right side of the middle cam portion 136.
A linear lower straight cam surface 147 is formed continuously at the upper end of 6. The lower linear cam surface 147 is
5 and 146, the length of the lower straight cam surface 14
The angle of inclination of the lower linear cam surface 146 and the lower linear cam surface 147 is G in comparison with the angle of inclination of FIG. . Then, on the right side surface of the middle cam portion 136 in FIG.
A side linear cam surface 148 that is linear so as to be continuous with the end of the lower linear cam surface 147 is formed vertically. The length of the lower linear cam surface 147 is short, and the joining point between the lower linear cam surface 147 and the side linear cam surface 148 is H. The upper end of the side straight cam surface 148 is continuous with the upper right end of the above-mentioned upper circular cam surface 143, and the joining point between them is J. The upper straight cam surface 149 is provided at the lower left corner of the substrate 134 in FIG.
An upper linear cam surface 149 is formed on the upper surface of the upper linear cam surface and is inclined toward the lower right. The right end of the upper linear cam surface 149 is a vertex K having an acute angle.

[[Positional relationship of cam surface]]

The cam surfaces of the upper cam portion 135, the middle cam portion 136, and the lower cam portion 137 are formed as described above. The positional relationship between the respective cam surfaces will be described.

FIG. 16 shows the arrangement and positional relationship of each cam surface. In this figure, the bottom portion C is located on the left side of the joint A, and the joint A is
Of the cam plate 113 is eccentric to the left of the center of the cam plate 113. The junctions D and E are arranged at positions vertically perpendicular to each other, and the junctions D and E are located on the left side of the bottom C. The junction F is located slightly to the right of the junction E and slightly to the left of the vertex K. Next, the joining points H and J are arranged at vertical positions vertically, and the vertex B is arranged at a position between the joining points J and A. That is, when the main positions of the cam surface are shown in order from the right side in FIG.
(H), a vertex B, a junction point A, a junction point G, a bottom part C, a vertex K, a junction point F, and a junction point D (E) are left and right positional relationships. Also, the main positions of the cam surface in the vertical direction will be described with reference to FIG.
(G), a junction point F, and a vertex K are arranged in this order. With such an arrangement, the guide claws 127 sliding on the respective cam surfaces are provided.
The trajectory of the movement can be determined.

The guide claws 127 shown by broken lines in FIG.
The following describes how the guide claw 127 moves from this position. When the guide claw 127 is moved upward in FIG. 16, the guide claw 127 is first moved to the lower straight cam surface 1.
It slides in contact with 46 and is moved to the upper right in the figure.
When the guide claw 127 passes through the joint point G, it then contacts the lower linear cam surface 147 and moves to the joint point H while sliding on the surface of the lower linear cam surface 147. It moves to the position of the joining point J. Guide claws 12
7 moves further upward, the lower arc cam surface 1
41, and the guide claw 127 is moved to the lower circular cam surface 14.
It moves leftward in FIG. 16 along the inclined surface 1.
Then, it finally moves to the position of the vertex B of the lower arc cam surface 141, and stops at this position.

Next, when the guide claw 127 is pulled down with respect to the cam plate 113, the guide claw 127 is separated from the point B,
It contacts the inclined surface between the bottom portion C of the upper circular cam surface 143 and the junction point J. The guide claw 1 is provided on the inclined surface of the upper circular cam surface 143.
When the guide claw 127 is brought down by contact with the guide claw 127,
Is moved to the left in FIG. 16 along the inclination,
Move to the bottom C of the slope. When the guide claw 127 is slid to the bottom C, the guide claw 127 stops at that position and cannot move downward any further.
In this state, the guide claw 127 is locked to the upper circular cam surface 143 of the middle cam portion 136, and the swing claw body 117 including the guide claw 127 in FIG. 15 and the inner cylinder 52 are suspended. Will be.

When the guide claw 127 is pushed upward with respect to the cam plate 113, the guide claw 127 is separated from the bottom point C and comes into contact with the lower surface of the lower linear cam surface 142. Since the bottom C is located on the left side of the junction A in FIG. 16, the raised guide claw 127 does not contact in the direction of the vertex B. The guide claw 127 in contact with the inclined surface of the lower straight cam surface 142 is pushed up and moved leftward in FIG. 16 along the inclination. When the guide claw 127 is pulled down with respect to the cam plate 113 after moving to the left to some extent, the guide claw 127 is located on the left side of the joining point B, so that the guide claw 127 becomes a vertical side straight line. It contacts the side surface of the cam surface 144 and moves downward, and finally contacts the upper surface of the upper linear cam surface 149. When the guide claw 127 comes into contact with the upper linear cam surface 149, the guide claw 127 is moved rightward in FIG. This vertex K
If the guide claw 127 moves downward, the guide claw 1
27 is located on the right side of the junction point F in FIG.

When the guide claw 127 is at such a position, the guide claw 127 is pushed upward again with respect to the cam plate 113, and the guide claw 127 is located on the left side of the joining point F. It does not contact the linear cam surface 145 but contacts the lower surface of the lower linear cam surface 146. Thereafter, the same exercise as described above is performed. Thus, the guide claw 127
When the guide claw 127 is moved up and down with respect to the cam plate 113, the guide claw 127 is moved to rotate counterclockwise around the middle cam portion 136, and this movement cycle is repeatedly performed in conjunction with the up and down movement. Will be The locus of movement of the guide claw 127 is shown in FIG.
It is represented by X in 6.

Next, referring to FIG. 17 to FIG. 23, a heavy object W is lifted by using the lifting / holding device 40 according to the embodiment of the present invention.
An operation in the case of automatically setting and canceling the pinching when lifting is performed will be described. In the description of this operation, the heavy object W is, for example, a groove cover or a block body made of concrete, weighs several tens of kilograms, and has a projection around the periphery thereof serving as a clue for lifting. It has a shape that cannot be grasped. This configuration is cumbersome to attempt to lift manually.

<Adjustment of Length Using Slides 62 and 82>

In order to grasp the heavy object W by the lifting and holding device 40, the telescopic operating body 41, the left swing body 42, and the right swing body 43
10 are connected by through pins 45, and FIG.
It is used in a form that forms an inverted T-shape as shown in FIG. In this drawing, the telescopic operating body 41 is used upright, and the left rocking body 42 and the right rocking body 43 are arranged in a straight line slightly to the left and right. By inserting a wire or a chain through a suspension ring 46 at the top of the telescopic operating body 41 and lifting the wire or chain with a crane or the like, the entire lifting and holding device 40 can be lifted.

Before using the lifting and holding device 40,
First, the positions of the slide bodies 62 and 82 are adjusted,
The space between 5 and 97 must be prepared to match the length of the weight W. The adjustment of the length can be performed by operating the nuts 68 and 88 and the double nuts 69 and 89. As shown in FIG. 12, a slide body 62 is slidably inserted into the rail arm 63,
At the same time, a long bolt 67 is inserted into the insertion hole 77,
The position of the slide body 62 with respect to the rail arm 63 can be freely moved. When the nut 68 screwed into the long bolt 67 is rotated, the position of the nut 68 can be moved in the length direction by the pitch of the long bolt 67, and is stopped at a required position. When the positioning plate 76 comes into contact with the nut 68, the slide body 62 cannot move further to the inner side of the rail arm 63 any more, and the position of the slide body 62 can be set.
Next, the double nut 69 is screwed in from the tip of the long bolt 67, and the positioning plate 76 is sandwiched between the nut 68 and the double nut 69 to fix the slide body 62 at that position.

Similarly, as shown in FIG. 12, a slide body 82 is slidably inserted through the rail arm 83.
At the same time, a long bolt 87 is inserted through the insertion hole 99,
The position of the slide body 82 with respect to the rail arm 83 can be freely moved. When the nut 88 screwed into the long bolt 87 is rotated, the position of the nut 88 can be moved in the length direction by the pitch of the nut 88, and is stopped at a required position. This nut 8
When the positioning plate 98 comes into contact with the slide arm 8, the slide body 82 cannot move further to the inner side of the rail arm 83 any more, and the position of the slide body 82 can be set. Next, a double nut 89 is screwed in from the tip of the long bolt 87, and the positioning plate 98 is sandwiched between the nut 88 and the double nut 89 to fix the slide body 82 at that position. In this position adjustment, by moving the slide members 62 and 82, the contact claws 7 protruding from the lower surface are moved.
The interval between 5 and 97 is set to be slightly longer than the length of the heavy object W. Furthermore, the distance between the contact pins 75 and 97 from the through pin 45 is set to be equal. By this adjustment, the right and left weight distribution centering on the through pin 45 becomes equal, and the left rocking body 42 and the right rocking body 4
3 can be hung while maintaining the horizontal without tilting.

<Gripping of heavy object W by contact claws 75 and 97>

Next, the operation of grasping the left and right side surfaces of the heavy object W by the lifting and holding device 40 will be described with reference to FIGS. In the figure, the heavy object W is disposed horizontally on the ground, and the lifting and holding device 40 is gently lowered in the Y direction from above the heavy object W, and the center of the lifting and holding device 40 (the telescopic operating body 41,
The contact pawls 75 and 97 can grip the side surface of the heavy object W by bringing the left rocking member 42 and the right rocking member 43 into contact with each other. At the time of this gripping operation, the length of the telescopic operating body 41 is reduced, and the inner cylinder 52 is inserted into the outer cylinder 51 in advance. In this state, since the opening / closing control mechanism 44 is engaged with the opening adjustment unit 47, the left rocking body 42 and the right rocking body 43 are kept at a position slightly inclined upward from horizontal as if the blades were spread left and right. Is held.
Further, the telescopic operating body 41 maintains a state in which its length is reduced.

<< Maintaining the state in which the inner cylinder 52 is inserted into the outer cylinder 51 >>

The relationship between the opening / closing regulating mechanism 44 and the opening adjustment portion 47 and the relationship between the swinging pawl body 117 and the cam plate 113 in this state will be described with reference to FIG.

First, a pair of inclined rails 109 are fixed to the lower part of the side surface of the outer cylinder 51.
Is inclined with respect to the length direction of the outer cylinder 51. For this reason,
Engagement claw 108 fitted between both inclined rails 109
, An acting force is generated on one of the outer cylinders 51 (the left front direction in FIG. 21). Since this acting force is transmitted to the sliding shaft 107 to which the engaging claw 108 is fixed, the sliding shaft 107 is
1, 93 are moved in the Q direction in FIG. Then, one end of the sliding shaft 107 protrudes from the side surface of the shaft projection 90, and the tip of the sliding shaft 107 is located above the adjustment bolt 72. For this reason, the head of the adjustment bolt 72 comes into contact with the lower surface of the distal end of the slide shaft 107, and the rails 63 and 83 rotate about the through pin 45 because the adjustment bolt 72 interferes. Regulate what you do. In this manner, the rail arms 63 and 83 (that is, the left rocking body 42 and the right rocking body 43) cannot rotate further downward with the through pin 45 as the center of rotation, and the right and left as if the blades were expanded. 17 is held in an open state (the state shown in FIG. 17).

The positional relationship between the swinging pawl body 117 and the cam plate 113 inside the outer cylinder 51 at this time will be described with reference to FIG. Inner tube 5 inside outer tube 51
2, the swinging pawl 117 is pushed up above the outer cylinder 51, and the guide pawl 127 at the upper end of the swinging pawl 117 is located between the upper cam portion 135 and the middle cam portion 136. Located in space. As described above, since the outer cylinder 51 is hung by the wire or chain hung on the suspension ring 46, the guide claw 127 is in contact with the bottom C of the upper arc cam surface 143, and the guide claw 127 is Cam surface 14
3 and is suspended. For this reason, the guide claw 1
27, a pin 118, an inner cylinder 52,
Are suspended in the same manner as the guide claws 127, and the inner cylinder 52 is held in a state of being inserted into the upper part of the outer cylinder 51.

In this state, when the suspension ring 46 is lifted by a wire hooked on a crane or the like, the telescopic operating body 41, the left rocking body 42, and the right rocking body 43 in the contracted state are lifted upward. Next, it moves above the heavy object W which is going to grab the whole lifted holding device 40,
As shown in FIG. 17, the lifting holding device 40 is gently lowered in the Y direction. At this time, the left swinging body 42, which is open left and right,
The length direction of the right rocking body 43 is made to coincide with the length direction of the heavy object W, and the heavy object W is disposed between the left and right contact claws 75 and 97. This state is shown in FIG.
Since the slide shaft 107 is in contact with the adjustment bolt 72 as described above, the left and right ends of the rail arms 63 and 83 of the lifting and holding device 40 are slightly above the position of the through pin 45. And is inclined in the direction of the through pin 45. For this reason, the contact claws 75 and 9 arranged on the left and right
7 is enlarged downward so as to have a slightly “C” shape, and the left and right corners of the heavy object W are positioned so as to be easily inserted into the lower surfaces of the rail arms 63 and 83.

<< Operation of Extending Inner Tube 52 from Outer Tube 51 >>

When the entire lifting and holding device 40 is lowered in the Y direction as shown in FIG. 18, the vicinity of the lower portion of the center through pin 45 comes into contact with the upper surface of the heavy object W, and then the rail arms 63 and 83 The lower surface contacts the surface of the heavy object W, and the rail arms 63 and 83 rotate about the through pin 45 so as to be linear. Even after the lower surface of the rail arms 63 and 83 comes into contact with the surface of the heavy object W and the lifting and holding device 40 is placed, the outer cylinder 51 is still lowered downward (when the wire suspended by the crane is lowered, The outer cylinder 51 is automatically lowered by its own weight), the outer cylinder 51 is lowered downward with respect to the inner cylinder 52, and the swinging pawl 117 provided inside the inner cylinder 52 is relatively moved to the outer cylinder 51. It will move upward. Then, Figure 1
As shown by 6, the guide claw 127 is released from contact with the bottom C of the upper arc cam surface 143, and the guide claw 127 moves upward.

That is, when the outer cylinder 51 is lowered with respect to the inner cylinder 52, the guide pawl 1 is relatively moved together with the swing pawl body 117.
The guide pawl 127 moves vertically away from the bottom C shown in FIG. 16 and comes into contact with the lower surface of the lower linear cam surface 142. The guide claw 127 in contact with the lower surface of the lower linear cam surface 142 is moved upward in FIG. 16 according to the inclination of the cam surface by being pressed upward, and the swing claw body 117 is centered on the pin 118. Will be rotated.

As described above, when the inner cylinder 52 is inserted into the outer cylinder 51 and the outer cylinder 51 is lowered to the lowermost position, the swing claw 11
7 is rotated, and the guide claw 127 is moved to the left. As described above, once the outer cylinder 51 is lowered to the lowermost position, an operation of lifting the suspension ring 46 again by a wire hung on a crane or the like is performed. Then, the outer cylinder 51 is pulled upward with respect to the inner cylinder 52, and the telescopic operating body 41 is extended.
Of the rocking claw 11
7 and the guide claws 127 are lowered with respect to the cam plate 113. Then, in the previous operation, since the guide claw 127 has been moved to the left in FIG. 16 and stopped at that position, the guide claw 127 is moved to the upper arc cam surface 143.
Without vertically contacting the upper surface of the side linear cam surface 144. When the outer cylinder 51 is further raised with respect to the inner cylinder 52, the guide claws 12
7 comes into contact with the upper surface of the upper straight cam surface 149.

Since the upper linear cam surface 149 is inclined from the upper left to the lower right as shown in FIG. The claw 11 is moved to the right,
7 is rotated clockwise about the pin 118. Still further, when the outer cylinder 51 is raised with respect to the inner cylinder 52,
The guide claw 127 moves to the right from the vertex K at the tip of the upper linear cam surface 149, and the contact between the upper linear cam surface 149 and the guide claw 127 is released. In such a state, the guide claw 127 does not come into contact with any of the cam surfaces of the cam plate 113, and the swing claw body 117 remains slightly vertical. In this state, there is no restriction on the expansion and contraction movement of the outer cylinder 51, and the outer cylinder 51 can be further pulled up with respect to the inner cylinder 52. As shown in FIG. Can rise. The telescopic operating body 41 assembled by the outer cylinder 51 and the inner cylinder 52 has a longer overall length, and extends until the bolt 55 engages with the upper inner edge of the elongated hole 54. In this state, the force lifted by the wire hung on the crane, etc.
6. The outer cylinder 51, the bolt 55, and the long hole 54 are transmitted in this order.
The inner cylinder 52 can be lifted. And the inner cylinder 52
The left rocking body 42 and the right rocking body 43 are also lifted at the same time by the through pin 45 inserted into the pin hole 53.

<< Release of restriction on rotation of left rocking body 42 and right rocking body 43 >>

When the outer cylinder 51 is pulled up with respect to the inner cylinder 52, the inclined rail 109 fixed to the side surface of the outer cylinder 51 is also pulled up with respect to the inner cylinder 52. Then, the engaging claw 108 meshed between the pair of inclined rails 109 is relatively stopped because it is on the inner cylinder 52 side, and the engaging claw 108 is attached to the outer cylinder 51 according to the inclination angle of the inclined rail 109. The acting force acts in a direction perpendicular to the direction in which is lifted. For this reason, the engaging claw 1
The sliding shaft 107 to which 08 is fixed is moved in the R direction in FIG. 22, and the sliding shaft 107 slides in the shaft holes 91 and 93. For this reason, one end of the sliding shaft 107 (the front left side in FIG. 22) is retracted inside the shaft projection 90, and the sliding shaft 107
No longer protrudes from the side surface of the shaft projection 90, and the adjusting bolt 7
2 will not be covered. By the operation of retracting the sliding shaft 107, the sliding shaft 1 is attached to the head of the adjustment bolt 72.
07 comes into contact, and the state in which the rail arms 63 and 83 are restricted from rotating around the through pin 45 is released. Then, the rail arms 63 and 83 can rotate in the downward P direction in FIG. 22, respectively, and the rail arms 63 and 83 can freely rotate around the through pin 45.

The rail arms 63 and 83 on both sides are fitted with the through pins 45.
20, the contact claws 75 and 97 fixed to the slide bodies 62 and 82 can contact the left and right side surfaces of the heavy object W as shown in FIG. Becomes

<Lifting of heavy object W>

As described above, the sliding shaft 107 and the adjusting bolt 7
After the restriction of the rotation of the rail arms 63 and 83 by the second arm 2 is released, as shown in FIG. It is firmly grasped by the right and left contact claws 75 and 97 and is pulled up in the Z direction. This operation will be described below.

As described above, when the suspension ring 46 is pulled up by a wire hung on a crane or the like, the outer tube 51 is pulled up, the inner tube 52 is pulled up through the bolt 55, and the rail arm 63 is passed through the through pin 45. And 83 will be lifted. Since the regulation of the rotation of the rail arms 63 and 83 by the sliding shaft 107 and the adjustment bolt 72 has been released, when the through pin 45 rises in the Z direction, the tips of the rail arms 63 and 83 are first pulled up, and The rear ends of the rail arms 63 and 83 (right front side and left rear side in FIG. 19, left and right ends in FIG. 20) are left as they are. Then, in FIG. 20, the rail arm 63 rotates counterclockwise about the through pin 45, and the rail arm 83 rotates clockwise about the through pin 45.
The rear end of each of the rail arms 63 and 83 is located below the through pin 45 and is deformed into a "F" shape. Then, the contact claw 75 of the slide body 62 to which the rail arm 63 is fixed is in close contact with the left side surface of the heavy object W, and the contact claw 95 of the slide body 82 to which the rail arm 83 is fixed is in contact with the right side surface of the heavy object W. Will be in close contact with This is because the space between the contact claws 75 and 95 is slightly longer than the length of the upper part of the heavy object W, so that a gap (play) occurs between the upper surface of the heavy object W and the tip of the rail arm 63, 83. Because.

When the telescopic operating body 41 is pulled up in the Z direction as shown in FIGS. 20 and 21 in a state where the insides of the contact claws 75 and 95 are in close contact with the left and right side surfaces of the heavy object W in this Z direction, The lifting force is a component force on the left and right rail arms 63 and 83, and acts so as to press the contact claws 75 and 95 against the side surface of the heavy object W with a strong force. This is the rail arm 63, 8
This is because there is an acute angle between the length direction of the contact 3 and the length direction of the heavy object W, and the component force around the through pin 45 is boosted more than the lifting force in the Z direction. And 95
By holding the side of the heavy object W with strong force,
The heavy object W is held without sliding down from the contact claws 75 and 95, and is lifted in the Z direction together with the telescopic actuator 41. In this way, the heavy object W can be grabbed and lifted, and the hanging ring 46 is moved in a horizontal direction by a wire hung on a crane, and the wire is gently lowered at the moved place. The heavy object W can be moved while being automatically grabbed.

<Automatic release of heavy object W>

As described above, the heavy object W is grasped,
After moving to a predetermined location, the heavy object W must be lowered at that location to release the gripping. This operation is automatically performed by placing the lower surface of the heavy object W on the ground or the like in a state where the suspension ring 46 is lifted by a wire hung on a crane, and moving only the suspension ring 46 and the outer cylinder 51 downward. be able to.

<< Change in engagement of swing pawl body 117 with cam plate 113 >>

When the heavy object W is suspended, the lower surfaces of the left rocking member 42 and the right rocking member 43 are separated from the surface of the heavy member W as shown in FIG. I have. When the telescopic operating body 41 suspended by the suspension ring 46 is lowered, the lower surface of the heavy object W is in close contact with the ground or the like and does not descend any further. The rail arm 63 and the arm 83 rotate around the through pin 45 and the lower surfaces of the rail arm 63 and the arm 83 come into close contact with the surface of the heavy object W. In this state, the inner cylinder 52 connected to the rail arm 63 and the arm 83 stops at that position without lowering further.

When the suspension ring 46 is further lowered by lowering the wire hung on the crane, the outer cylinder 51 is still lowered by its own weight, and the inner cylinder 52 acts so as to be pushed inside the outer cylinder 51, and the expansion and contraction operation is performed. Body 41 changes such that its overall length is shortened. Since the outer cylinder 51 descends, the inner cylinder 5
2 relatively rises, the swinging pawl 117 connected to the inner cylinder 52 moves above the outer casing 51, and the guide pawl 127 of the pivoting pawl 117 contacts the cam surface of the cam plate 113. Will be. This state of contact will be described with reference to FIG. 16. When the guide claws 127 located below the cam plate 113 rise relatively with the lowering of the outer cylinder 51, the guide claws 127 become lower surfaces of the lower linear cam surface 146. And contact with the head. Then, the guide claw 127 is moved rightward in FIG. 16 by the inclination of the lower linear cam surface 146. After passing through the joint point G, it comes into contact with the lower linear cam surface 147 and is further moved rightward by the inclination. Can be Then, the guide claw 127 is connected to the joining point H.
, The guide claw 127 does not move to the right any further, but rises upward in FIG. 16 along the side surface of the side linear cam surface 148 with the relative rise of the inner cylinder 52. When the guide claw 127 rises linearly in this way, the guide claw 1
27 is in contact with the lower surface of the lower arc cam surface 141,
7 is moved to the left in FIG. 16 according to the cam curve of the lower arc cam surface 141. When the outer cylinder 51 descends to the lowermost position, the guide claw 127 moves to the vertex B, which is the uppermost position of the lower circular cam surface 141, and stops at this position (the lower circular cam surface 141 is inverted). , The guide claw 127 cannot move any further.)

<<< Swinging Claw Body 11 to Upper Arc Cam Surface 143>
Lock of 7 >>

By lowering the outer cylinder 51, the outer cylinder 5
Once the inner cylinder 52 has been inserted into the inside of
When the suspension ring 46 is lifted by a wire hung on a crane or the like, the outer cylinder 51 rises. With the rise of the outer cylinder 51, the cam plate 113 also rises at the same time, and the guide pawl 127
Is relatively lowered, and the position at which the guide claw 127 contacts the cam plate 113 changes. First,
When the cam plate 113 rises in FIG. 16, the guide claw 127 is stopped and the guide claw 127 is relatively lowered in the figure, but the guide claw 127 has a cam curve of the lower arc cam surface 141. It has been moved to the left and is located to the left of the junction J. Therefore, when the guide claw 127 moves vertically downward as it is, it comes into contact with the upper surface of the upper arc cam surface 143, and when the guide claw 127 is lowered in FIG. Moved in the direction. Further, when the guide claw 127 is lowered in FIG. 16, the guide claw 127 comes into contact with the lower portion C at the lowest position of the upper arc cam surface 143 and is locked at that position. When the guide claw 127 is locked to the lower part C of the upper arc cam surface 143, the guide claw 127 cannot be further lowered, and at the same time, the swinging claw body 11 to which the guide claw 127 is connected.
7, the pin 118, and the inner cylinder 52 cannot be lowered in the same manner, and in this state, the outer cylinder 51 cannot be pulled out from the inner cylinder 52 and stops. When the suspension ring 46 is further lifted, the inner cylinder 52 is housed in the outer cylinder 51 and
The through pin 45 is pulled up in a state where 1 is reduced, and the left rocking body 42 and the right rocking body 43 are lifted by the through pin 45.

<< Regulation of Rotation of Rail Arms 63 and 83 >>

As described above, when the outer cylinder 51 is lowered and the inner cylinder 52 is inserted therein, the inclined rail 109 fixed to the side surface of the outer cylinder 51 is simultaneously lowered as shown in FIG. become. Since the engaging claw 108 is engaged between the pair of inclined rails 109, the inclined rail 1
The downward movement of 09 causes the engaging claw 108 to act on the front left of FIG. 21 to move the sliding shaft 107 to which the engaging claw 108 is fixed in the Q direction in the figure.
When the sliding shaft 107 slides in the shaft holes 91 and 93 and moves in the Q direction, the tip of the sliding shaft 107 (left front side in FIG. 21)
Protrudes from the side surface of the shaft projection 90 and stops at that position. An adjusting bolt 72 is provided below the sliding shaft 107.
Is located, the head of the adjustment bolt 72 comes into contact with the lower surface of the protruding tip portion of the sliding shaft 107. Thus, when the head of the adjustment bolt 72 comes into contact with the lower surface of the sliding shaft 107, the rail arm 63 and the rail arm 83 are connected to the through pin 4
5 cannot rotate around the center of rotation, and its opening angle remains fixed. That is, FIGS.
As shown by, the left and right rail arms 63 and 83 open each end slightly upward, and are maintained in a state where the blades are spread.

<Uplifting of the lifting and holding device 40>

In this state, as shown in FIG. 18, the insides of the contact claws 75 and 97 are separated from both side surfaces of the heavy object W. The entire holding device 40 is separated from the heavy object W, and the engagement between the lifting holding device 40 and the heavy object W is automatically released.

By performing the above operation, the suspension ring 46 can be lifted by a wire or the like hung on a crane,
With the operation of suspending, the operation of grasping, suspending, moving, and releasing the grasp of the heavy object W can be performed. This cycle can be performed repeatedly.

<Adjustment of the closing angle of the rail arms 63 and 83>

As described above, the entire lifting and holding device 40 can be moved up and down by a wire or the like hung on a crane. However, in some cases, the heavy object W cannot be grasped by the contact claws 75 and 97. (For example, contact nail 75,
97 slips, etc.). 20 while the regulation of the rotation of the rail arms 63 and 83 by the opening / closing regulation mechanism 44 is released.
When the lifting and holding device 40 is pulled up in the Z direction as it is, the contact arms 75 and 97 are not in contact with the heavy object W, so that the rail arms 63 and 83 rotate downward about the through pin 45 as they are. Then, the rear ends of the rail arms 63 and 83 (the sides to which the slide bodies 62 and 82 are attached) collide. In such a state, the operation of automatically grasping, lifting, and automatically releasing the heavy object W by the lifting and holding device 40 cannot be performed. In order to prevent such a state, the closing adjustment section 48 regulates the angle at which the rail arms 63 and 83 hang down around the through pin 45 so that the angle can be finely adjusted. Has become.

As shown in FIG. 13, a position adjusting member 154 is fixed to the side surface of the tip of the rail arm 63, and an adjusting bolt 156 is screwed into a screw hole 155 of the position adjusting member 154. The axis of this adjustment bolt 156 is pin hole 8
5 is located below the axis of the rail arm 63.
And 83 rotate around the through pin 45, the head of the adjustment bolt 156 comes into contact with the lower portion of the tip end surface of the rail arm 83, and further restricts the rail arms 63 and 83 from rotating. I have. Therefore, even if the opening / closing control mechanism 44 is released and the rail arms 63 and 83 can rotate freely downward, the adjustment bolt 156 sets the limit of the angle at which the two can be lowered into a “C” shape. be able to. The adjustment of the closing angle of the rail arms 63 and 83 is performed by adjusting the adjustment bolt 156.
Can be varied by the length of screwing into the screw hole 155.

[0121]

According to the present invention, since the present invention is constructed as described above, a block or the like is lifted and directly transported to the installation position.
In addition, it becomes an inexpensive lifting and holding device that can be installed.

According to the present invention, the telescopic operating body can expand and contract its entire length along its length direction, and temporarily stops at that position when it is fully extended and when it is reduced to the minimum. be able to. Then, the opening / closing restricting mechanism operates in conjunction with the maximum and minimum positions, so that the swinging body extending left and right can be restricted from moving downward about the rotation axis. For this reason, it is possible to keep the left and right swinging members open by the opening / closing control mechanism by reducing the telescopic operating member. In this state, approach the heavy object and bring the opened contact claws into contact with both side surfaces thereof. Can be. Then, when the telescopic operating body is pulled up and extended, the downward rotation of the rocking body by the opening / closing restricting mechanism is released, so that the right and left contact claws press against both side surfaces of the heavy object, and as the telescopic operating body is pulled up. Heavy objects can be lifted by the contact claws. In addition, the opening / closing regulating mechanism regulates downward rotation of the oscillating body in accordance with the operation of hanging down a heavy object to reduce the telescopic operating body, and maintains the swinging body in a state of being opened right and left. The engagement of the object can be automatically released. This operation can be performed in conjunction with the operation of lifting or suspending the telescopic operating body with a crane or the like. This eliminates the need for a worker to set and release the engagement, thereby saving labor. In addition, since it is not necessary to arrange an operator near a heavy object that is likely to cause an accident when a person falls down, danger can be prevented beforehand.

A mechanism for temporarily stopping the expansion and contraction operation when the expansion and contraction member is extended and contracted is performed by a sliding guide fixed to the upper expansion and contraction and a contact moving member provided to the lower expansion and contraction. It is simplified and does not require other power such as an electric signal or air pressure, thereby saving energy.

The rotation of the left and right rockers can be restricted by a horizontal slide that moves in a direction perpendicular to the length direction of the rocker. Can slide left and right. For this reason, the regulation can be set and released by the contact of the horizontal slide body that comes and goes with the opening adjustment section fixed to the other swinging body, and the regulation can be reliably performed.

Further, the temporary stop operation when the telescopic operating member is extended and contracted is performed by a sliding guide having a cam surface and a contact moving member having a swinging pawl body contacting the cam surface. be able to. This cam surface is formed on a plurality of cam portions, and by alternately contacting the respective cam surfaces of the upper cam portion and the middle cam portion, the swinging pawl body can move on a predetermined locus. By the movement of the telescopic operating body, the length can be alternately held in an extended state and a contracted state.

The opening / closing restricting mechanism is composed of a thrust action body and a horizontal slide body. The thrust action body is fixed diagonally to the upper telescopic body with a pair of inclined rails at intervals. The structure comprises a sliding shaft and an engagement claw, and the engagement claw is fitted between the inclined rails. With this configuration, it is ensured that the vertical movement of the upper telescopic body is converted to the movement perpendicular to the sliding shaft via the inclined rail, and the structure is simplified.

[0127] The telescopic operating body is composed of an inner cylinder and an outer cylinder, and both are telescopically combined.
An elongated hole is opened on the side surface of the inner cylinder, and the inner cylinder and the outer cylinder can be connected by inserting a connecting pin fixed to the outer cylinder into the elongated hole. In this connection, the connection pin can be engaged with the upper part of the long hole to support the load when it is extended to the maximum length. Is not added, and the mechanism can be prevented from being deformed.

Further, the rocking body is composed of an arm body and a slide body, and the slide body can slide freely with respect to the arm body, and its position can be changed. Therefore, it is possible to easily perform the fine adjustment with respect to the size of the heavy object to be pressed by moving the contact claw fixed to the slide body. Further, the slide body can be fixed at that position by screwing the nut into the long bolt, and the position fixation after the adjustment is simplified.

Note that the left and right rockers can rotate downward about the rotation axis, but when the closing adjustment portion fixed to one rocker contacts the other rocker, the two rockers are closed. The angle can be regulated. For this reason, even when the left and right oscillating bodies are lifted by the telescopic operating body, the left and right oscillating bodies do not close at a predetermined angle or more, and the operation is simplified.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an embodiment of a lifting and holding device.

FIG. 2 is a cam diagram showing an embodiment of a cam sliding body.

FIG. 3 is a partial cross-sectional view showing an embodiment of an interlocking state of a cam sliding body and a driven member when a holding arm is held open.

FIG. 4 is a partial cross-sectional view showing an embodiment of an interlocking state of a cam sliding body and a driven member when a holding arm presses and holds a holding object.

FIG. 5 is a side view showing an embodiment in an adjustment state of holding open with a long holding object.

FIG. 6 is a side view showing an embodiment in an adjusted state of holding open with a short holding object.

FIG. 7 is a side view showing an embodiment of a holding arm closing angle adjustment unit.

FIG. 8 is a side view showing an embodiment in a folded state of the cam sliding body.

FIG. 9 is a state diagram showing a construction example of the lifting and holding device.

FIG. 10 is a perspective view showing one embodiment of the lifting and holding device of the present invention, as viewed from the opening adjustment unit side.

FIG. 11 is a perspective view showing one embodiment of the lifting and holding device of the present invention, as viewed from the closing adjustment unit side.

FIG. 12 is an exploded perspective view showing an embodiment of the lifting and holding apparatus of the present invention, in which members constituting the whole are separated and shown.

FIG. 13 is an exploded perspective view showing an embodiment of the lifting and holding device of the present invention, in which the vicinity of a closing adjustment unit is enlarged.

FIG. 14 is an exploded perspective view showing an embodiment of a lifting and holding device of the present invention, in which members constituting a telescopic operating body are exploded.

FIG. 15 is an exploded perspective view showing an embodiment of a lifting and holding device of the present invention, in which an arrangement of a position stop mechanism provided on a telescopic operating body is disassembled.

FIG. 16 is a plan view showing one embodiment of the lifting and holding device of the present invention, showing a cam surface shape of a cam plate constituting a position stop mechanism.

FIG. 17 is a perspective view showing a state before holding, for explaining an operation of lifting a heavy object according to the embodiment of the lifting holding device of the present invention.

FIG. 18 is an explanatory view showing a state before clamping, from a side, for describing an operation of lifting a heavy object according to the embodiment of the lifting clamping device of the present invention.

FIG. 19 is a perspective view showing a state after holding, for explaining an operation of lifting a heavy object according to the embodiment of the lifting holding device of the present invention.

FIG. 20 is an explanatory view showing a state after the holding from the side, for describing an operation of lifting a heavy object according to the embodiment of the lifting holding device of the present invention.

FIG. 21 is a perspective view for illustrating a state in which the rotation of the left and right rail arms is regulated by the opening / closing regulating mechanism according to the embodiment of the lifting and holding device of the present invention.

FIG. 22 is a perspective view for illustrating a state in which the rotation of the left and right rail arms is released by the opening / closing control mechanism according to the embodiment of the lifting and holding device of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Suspended rod 2 Outer cylinder 3 Cam 4 Inner cylinder 5 Connecting rod 6 Elongated hole 7 Hook 8 Nipping arm 9 Nipping piece 10 Guide 11 Screw feeder 12 Slant sliding guide 13 Driven member 14 Bearing part 15 Bearing part sliding Locking portion 16 Nipping arm closing angle adjusting portion 17 Nipping arm opening angle adjusting portion 18 Nipping object 19 Mortar 20 Joint gap 40 Lifting holding device 41 Telescopic operating member 42 Left rocking member as one rocking member 43 As the other rocking member Right swinging body 44 opening / closing regulating mechanism 45 through pin as a rotating shaft 47 opening adjusting part 48 closing adjusting part 51 outer cylinder as upper elastic body 52 inner cylinder as lower elastic body 54 long hole 55 bolt as connecting pin 61 Arm body 62 Slide body 67 Long bolt 68 Nut 77 Insertion hole 75 Contact claw 81 Arm body 82 Slide body 87 Long bolt 88 Nut 97 Contact claw 9 through hole 113 in the swing claw member 130 positioned stop mechanism 135 on the cam portion 136 of the cam plate 117 contacts the moving member as a sliding guide member cam portion

Claims (9)

[Claims] The telescopic operating body comprises a telescopic operating body which is raised slightly vertically, one rocking body which is oriented slightly horizontally, and another rocking body which is oriented slightly horizontally. Combining the lower end, the tip of one oscillator, and the tip of the other oscillator, and connecting the three members rotatably from the side surface with a rotation axis to form an inverted T-shape. Contact claw is provided on each lower surface, each contact claw is brought into close contact with the left and right sides of the heavy object, and the right and left rocking body connected to the lower end is lifted up by lifting the telescopic operating body, and the contact claws on both sides are weighted. In a lifting and holding device that can be pressed against the left and right side surfaces of an object to pinch and lift a heavy object, the expansion and contraction operating body can expand and contract in its length direction. Stopped at the position when reduced And an opening / closing restricting mechanism provided on any of the rocking members to restrict the left and right rocking members from rotating around the rotation axis. A lifting / holding device capable of alternately controlling the opening / closing operation of the left and right rockers in synchronization with the operation, thereby alternately holding and releasing a heavy object. 2. The telescopic operating body comprises a telescopic operating body raised slightly vertically, one rocking body oriented slightly in a horizontal direction, and another rocking body oriented slightly in a horizontal direction. The lower end, the tip of one oscillator, and the tip of the other oscillator are combined to form an inverted T-shape by connecting the three members rotatably from the side with a rotation axis. Contact claw is provided on each lower surface, each contact claw is brought into close contact with the left and right sides of the heavy object, and the right and left rocking body connected to the lower end is lifted up by lifting the telescopic operating body, and the contact claws on both sides are weighted. In a lifting and holding device that can be pressed against the left and right side surfaces of an object to pinch and lift a heavy object, the expansion and contraction operating body is composed of an upper and lower elastic body, and a rotation shaft is attached to a lower end of the lower elastic body. Connect the tip of a pair of oscillators, and change the upper telescopic body to the lower telescopic body A sliding guide body having a cam surface is fixed to the upper elastic body, and a contact moving along the cam surface of the sliding guide body to the lower elastic body. A moving body is provided, and a position stop mechanism is formed by the sliding guide body and the contact moving body, and one of the rocking bodies restricts the left and right rocking bodies from rotating downward about the rotation axis. An opening / closing restricting mechanism is provided, and the entire length of the telescopic operating body is alternately stopped at either the shortest length or the longest length by the position stop mechanism when the upper telescopic body and the lower telescopic body are expanded and contracted. The opening and closing control mechanism is interlocked in synchronization with the expansion and contraction operation of the expansion and contraction operation body, and the opening and closing operation of the left and right rocking bodies is alternately controlled, so that the holding and release of the heavy object can be performed alternately. Lifting holding device. 3. A telescopic operating body which is raised up vertically, one rocking body slightly oriented in a horizontal direction, and another rocking body oriented slightly in a horizontal direction. Combining the lower end, the tip of one oscillator, and the tip of the other oscillator, and connecting the three members rotatably from the side surface with a rotation axis to form an inverted T-shape. Contact claw is provided on each lower surface, each contact claw is brought into close contact with the left and right sides of the heavy object, and the right and left rocking body connected to the lower end is lifted up by lifting the telescopic operating body, and the contact claws on both sides are weighted. In a lifting and holding device that can be pressed against the left and right side surfaces of an object to pinch and lift a heavy object, the expansion and contraction operating body can expand and contract in its length direction. Stopped at the position when reduced A horizontal slide that slides in a direction perpendicular to the longitudinal direction of the rocker in conjunction with the operation of the telescopic operating body is provided on one rocker, and contacts with the position of the horizontal slide to rotate. An opening adjustment portion for regulating rotation about the moving axis is provided on the other rocking body, and the horizontal slide body is moved in a direction perpendicular to the length direction of the rocking body in synchronization with the expansion and contraction operation of the telescopic operating body, When the opening adjustment section comes into contact with the moved horizontal slide body, the left and right rockers are prevented from rotating downward around the rotation axis, and the opening and closing operations of the rockers are alternately controlled. A lifting and clamping device capable of alternately clamping and releasing a heavy object. 4. A telescopic operating body which is raised slightly vertically, one rocking body oriented slightly in a horizontal direction, and the other rocking body oriented slightly in a horizontal direction. Combining the lower end, the tip of one oscillator, and the tip of the other oscillator, and connecting the three members rotatably from the side surface with a rotation axis to form an inverted T-shape. Contact claw is provided on each lower surface, each contact claw is brought into close contact with the left and right sides of the heavy object, and the right and left rocking body connected to the lower end is lifted up by lifting the telescopic operating body, and the contact claws on both sides are weighted. In a lifting and holding device that can be pressed against the left and right side surfaces of an object to pinch and lift a heavy object, the expansion and contraction operating body is composed of an upper and lower elastic body, and a rotating shaft is attached to the lower end of the lower elastic body. Connect the tip of a pair of oscillators, and change the upper telescopic body to the lower telescopic body A sliding guide body with a cam surface is fixed to the upper telescopic body, and a contact that moves along the cam surface of the sliding guide body to the lower telescopic body. A moving body is provided, and a position stop mechanism is formed by a sliding guide body and a contact moving body, and a horizontal slide body that slides in a direction perpendicular to the length direction of the rocking body in conjunction with the operation of the telescopic operating body. Is provided on the other rocking body, and an opening adjustment section that contacts the position of the horizontal slide body and regulates rotation about the rotation axis is provided on the other rocking body, and the horizontal slide is synchronized with the expansion and contraction operation of the expansion and contraction body. The body is moved in the direction perpendicular to the length direction of the rocking body, and the left and right rocking bodies are rotated downward about the rotation axis by the opening adjustment section contacting the moved horizontal slide body. By regulating the opening and closing operation of the oscillator alternately. Lifting clamping apparatus capable of clamping the original release of the object alternately. 5. The above-mentioned position stop mechanism comprises a sliding guide and a contact moving body, and the sliding guide has a flat plate-like shape, and an upper cam portion is provided on an upper portion of a side surface thereof. The middle cam part is formed in the shape of an island in the center of the side surface slightly, and the upper cam part has a lower circular cam surface and a lower linear cam surface formed downward. The arcuate cam surface and the lower linear cam surface are formed in a continuous saw blade shape, and the junction between the lower arcuate cam surface and the lower linear cam surface is located almost at the center of the sliding guide and protrudes downward. The middle cam portion has an island shape with a cam surface formed on its outer periphery, and has an upper arcuate cam surface curved downward on its upper surface, and its lower surface is inclined downward toward the lower arc cam surface. A straight cam surface is formed, and the lowermost position of the upper arc cam surface is the junction between the lower arc cam surface and the lower linear cam surface. The contact movable body is a swinging pawl body whose base is swingably attached to the lower telescopic body, and the upper end of the swinging pawl is hook-shaped. The guide claw is brought into contact with the cam surface of the sliding guide, and the guide claw is brought into contact with the upper arc cam surface by the operation of reducing the upper elastic body and the lower elastic body. The guide claw contacts the upper arcuate cam surface by the action of contact and the extension of the upper elastic body and the lower elastic body, and stops extending any further. The guide claw contacts the lower straight cam surface, moves according to its inclination, is deviated to a position deviating from the vertical position of the middle cam portion, and then the guide claw is moved by the operation of the upper elastic body and the lower elastic body extending. The guide claw moves to the lower part, and the guide claw moves The upper and lower telescopic members are moved by contact with the lower linear cam surface and guided by the lower circular cam surface. The lifting and holding device according to claim 2 or 4, wherein the suspension is temporarily stopped. 6. The opening / closing control mechanism described above comprises a thrust acting body provided on the upper telescopic body and a horizontal slide body provided on one of the oscillating bodies, and the thrust acting body is fixed to a lower portion of the upper telescopic body. The extension and contraction operation direction of the upper telescopic body is composed of a pair of inclined rails arranged at a distance in the direction inclined, and the horizontal slide body is attached to one of the rockers in a direction perpendicular to its length direction. It consists of a sliding shaft held so as to be slidable, and an engaging claw fixed to the sliding shaft and having its tip engaged between a pair of inclined rails. As a result, the engaging claw meshed between the pair of inclined rails is pushed in a direction perpendicular to the length direction of the rocking body, and the sliding shaft is moved by the engaging claw, thereby causing the other rocking body to move. Can come and go,
When the sliding shaft comes into contact with the other oscillator, both oscillators are prevented from rotating downward, and when the sliding shaft does not contact the other oscillator, both oscillators rotate downward. The lifting and holding device according to claim 1 or 2, wherein the lifting and holding device operates so as not to hinder the operation. 7. The telescopic operating body described above comprises an inner cylinder whose lower end is connected to the distal ends of left and right rockers by a rotating shaft, and an outer cylinder which slides in the longitudinal direction with respect to the inner cylinder. The inner cylinder has an elongated hole in the side surface of the inner cylinder in the length direction.By inserting a connecting pin fixed to the lower part of the outer cylinder through the elongated hole, the inner cylinder and the outer cylinder are aligned in the length direction. The swinging claw body having a guide claw whose tip is bent into a hook shape is rotatably supported at the upper part of the inner cylinder, and is rotatably supported at the upper part of the inner cylinder. 2. A flat cam plate having a cam surface with which a guide claw is contacted is fixed to the plate.
The lifting holding device according to 2, 3, or 4. 8. The above-mentioned oscillating body includes an elongated arm body and a slide body inserted so as to be movable in the length direction of the arm body. A long bolt with a thread formed on the outer periphery with the axis oriented is provided. An insertion hole through which the long bolt can be inserted is opened in the slide body, and a contact claw is fixed to the lower surface of the slide body. At the same time as inserting the slide body through the body, insert the long bolt into the insertion hole, sandwich the left and right sides of the slide body with nuts screwed into the long bolt, fix the slide body to the arm body, and adjust the position of the contact claw The lifting and holding device according to claim 1, 2, 3, 4, 5, or 7, wherein the lifting and holding device can be used. 9. A closing adjustment section is fixed to one of the above-mentioned rocking bodies, and the closing adjustment section comes into contact with the other rocking body, so that the left and right rocking bodies rotate the rotation shaft by a certain angle or more. The lifting and holding device according to claim 1, 2, 3, 4, 5, or 7, wherein the lifting and holding device is restricted from rotating downward about the center.